--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include <boost/lexical_cast.hpp>
+#include "include/assert.h" // lexical_cast includes system assert.h
+
+#include <boost/config/warning_disable.hpp>
+#include <boost/fusion/include/std_pair.hpp>
+
+#include "MDSRank.h"
+#include "Server.h"
+#include "Locker.h"
+#include "MDCache.h"
+#include "MDLog.h"
+#include "Migrator.h"
+#include "MDBalancer.h"
+#include "InoTable.h"
+#include "SnapClient.h"
+#include "Mutation.h"
+
+#include "msg/Messenger.h"
+
+#include "osdc/Objecter.h"
+
+#include "messages/MClientSession.h"
+#include "messages/MClientRequest.h"
+#include "messages/MClientReply.h"
+#include "messages/MClientReconnect.h"
+#include "messages/MClientCaps.h"
+#include "messages/MClientSnap.h"
+
+#include "messages/MMDSSlaveRequest.h"
+
+#include "messages/MLock.h"
+
+#include "events/EUpdate.h"
+#include "events/ESlaveUpdate.h"
+#include "events/ESession.h"
+#include "events/EOpen.h"
+#include "events/ECommitted.h"
+
+#include "include/filepath.h"
+#include "common/errno.h"
+#include "common/Timer.h"
+#include "common/perf_counters.h"
+#include "include/compat.h"
+#include "osd/OSDMap.h"
+
+#include <errno.h>
+
+#include <list>
+#include <iostream>
+using namespace std;
+
+#include "common/config.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_mds
+#undef dout_prefix
+#define dout_prefix *_dout << "mds." << mds->get_nodeid() << ".server "
+
+class ServerContext : public MDSInternalContextBase {
+ protected:
+ Server *server;
+ MDSRank *get_mds() override
+ {
+ return server->mds;
+ }
+
+ public:
+ explicit ServerContext(Server *s) : server(s) {
+ assert(server != NULL);
+ }
+};
+
+class ServerLogContext : public MDSLogContextBase {
+protected:
+ Server *server;
+ MDSRank *get_mds() override
+ {
+ return server->mds;
+ }
+
+ MDRequestRef mdr;
+ void pre_finish(int r) override {
+ if (mdr)
+ mdr->mark_event("journal_committed: ");
+ }
+public:
+ explicit ServerLogContext(Server *s) : server(s) {
+ assert(server != NULL);
+ }
+ explicit ServerLogContext(Server *s, MDRequestRef& r) : server(s), mdr(r) {
+ assert(server != NULL);
+ }
+};
+
+void Server::create_logger()
+{
+ PerfCountersBuilder plb(g_ceph_context, "mds_server", l_mdss_first, l_mdss_last);
+ plb.add_u64_counter(l_mdss_handle_client_request,"handle_client_request",
+ "Client requests", "hcr", PerfCountersBuilder::PRIO_INTERESTING);
+ plb.add_u64_counter(l_mdss_handle_slave_request, "handle_slave_request",
+ "Slave requests", "hsr", PerfCountersBuilder::PRIO_INTERESTING);
+ plb.add_u64_counter(l_mdss_handle_client_session, "handle_client_session",
+ "Client session messages", "hcs", PerfCountersBuilder::PRIO_INTERESTING);
+ plb.add_u64_counter(l_mdss_dispatch_client_request, "dispatch_client_request", "Client requests dispatched");
+ plb.add_u64_counter(l_mdss_dispatch_slave_request, "dispatch_server_request", "Server requests dispatched");
+ plb.add_u64_counter(l_mdss_req_lookuphash, "req_lookuphash",
+ "Request type lookup hash of inode");
+ plb.add_u64_counter(l_mdss_req_lookupino, "req_lookupino",
+ "Request type lookup inode");
+ plb.add_u64_counter(l_mdss_req_lookupparent, "req_lookupparent",
+ "Request type lookup parent");
+ plb.add_u64_counter(l_mdss_req_lookupname, "req_lookupname",
+ "Request type lookup name");
+ plb.add_u64_counter(l_mdss_req_lookup, "req_lookup",
+ "Request type lookup");
+ plb.add_u64_counter(l_mdss_req_lookupsnap, "req_lookupsnap",
+ "Request type lookup snapshot");
+ plb.add_u64_counter(l_mdss_req_getattr, "req_getattr",
+ "Request type get attribute");
+ plb.add_u64_counter(l_mdss_req_setattr, "req_setattr",
+ "Request type set attribute");
+ plb.add_u64_counter(l_mdss_req_setlayout, "req_setlayout",
+ "Request type set file layout");
+ plb.add_u64_counter(l_mdss_req_setdirlayout, "req_setdirlayout",
+ "Request type set directory layout");
+ plb.add_u64_counter(l_mdss_req_setxattr, "req_setxattr",
+ "Request type set extended attribute");
+ plb.add_u64_counter(l_mdss_req_rmxattr, "req_rmxattr",
+ "Request type remove extended attribute");
+ plb.add_u64_counter(l_mdss_req_readdir, "req_readdir",
+ "Request type read directory");
+ plb.add_u64_counter(l_mdss_req_setfilelock, "req_setfilelock",
+ "Request type set file lock");
+ plb.add_u64_counter(l_mdss_req_getfilelock, "req_getfilelock",
+ "Request type get file lock");
+ plb.add_u64_counter(l_mdss_req_create, "req_create",
+ "Request type create");
+ plb.add_u64_counter(l_mdss_req_open, "req_open",
+ "Request type open");
+ plb.add_u64_counter(l_mdss_req_mknod, "req_mknod",
+ "Request type make node");
+ plb.add_u64_counter(l_mdss_req_link, "req_link",
+ "Request type link");
+ plb.add_u64_counter(l_mdss_req_unlink, "req_unlink",
+ "Request type unlink");
+ plb.add_u64_counter(l_mdss_req_rmdir, "req_rmdir",
+ "Request type remove directory");
+ plb.add_u64_counter(l_mdss_req_rename, "req_rename",
+ "Request type rename");
+ plb.add_u64_counter(l_mdss_req_mkdir, "req_mkdir",
+ "Request type make directory");
+ plb.add_u64_counter(l_mdss_req_symlink, "req_symlink",
+ "Request type symbolic link");
+ plb.add_u64_counter(l_mdss_req_lssnap, "req_lssnap",
+ "Request type list snapshot");
+ plb.add_u64_counter(l_mdss_req_mksnap, "req_mksnap",
+ "Request type make snapshot");
+ plb.add_u64_counter(l_mdss_req_rmsnap, "req_rmsnap",
+ "Request type remove snapshot");
+ plb.add_u64_counter(l_mdss_req_renamesnap, "req_renamesnap",
+ "Request type rename snapshot");
+ logger = plb.create_perf_counters();
+ g_ceph_context->get_perfcounters_collection()->add(logger);
+}
+
+Server::Server(MDSRank *m) :
+ mds(m),
+ mdcache(mds->mdcache), mdlog(mds->mdlog),
+ logger(0),
+ is_full(false),
+ reconnect_done(NULL),
+ failed_reconnects(0),
+ reconnect_evicting(false),
+ terminating_sessions(false)
+{
+}
+
+
+/* This function DOES put the passed message before returning*/
+void Server::dispatch(Message *m)
+{
+ switch (m->get_type()) {
+ case CEPH_MSG_CLIENT_RECONNECT:
+ handle_client_reconnect(static_cast<MClientReconnect*>(m));
+ return;
+ }
+
+ // active?
+ if (!mds->is_active() &&
+ !(mds->is_stopping() && m->get_source().is_mds())) {
+ if (m->get_type() == CEPH_MSG_CLIENT_REQUEST &&
+ (mds->is_reconnect() || mds->get_want_state() == CEPH_MDS_STATE_RECONNECT)) {
+ MClientRequest *req = static_cast<MClientRequest*>(m);
+ Session *session = get_session(req);
+ if (!session || session->is_closed()) {
+ dout(5) << "session is closed, dropping " << req->get_reqid() << dendl;
+ req->put();
+ return;
+ }
+ bool queue_replay = false;
+ if (req->is_replay()) {
+ dout(3) << "queuing replayed op" << dendl;
+ queue_replay = true;
+ } else if (req->get_retry_attempt()) {
+ // process completed request in clientreplay stage. The completed request
+ // might have created new file/directorie. This guarantees MDS sends a reply
+ // to client before other request modifies the new file/directorie.
+ if (session->have_completed_request(req->get_reqid().tid, NULL)) {
+ dout(3) << "queuing completed op" << dendl;
+ queue_replay = true;
+ }
+ // this request was created before the cap reconnect message, drop any embedded
+ // cap releases.
+ req->releases.clear();
+ }
+ if (queue_replay) {
+ req->mark_queued_for_replay();
+ mds->enqueue_replay(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+ }
+
+ bool wait_for_active = true;
+ if (m->get_type() == MSG_MDS_SLAVE_REQUEST) {
+ // handle_slave_request() will wait if necessary
+ wait_for_active = false;
+ } else if (mds->is_clientreplay()) {
+ // session open requests need to be handled during replay,
+ // close requests need to be delayed
+ if ((m->get_type() == CEPH_MSG_CLIENT_SESSION &&
+ (static_cast<MClientSession*>(m))->get_op() != CEPH_SESSION_REQUEST_CLOSE)) {
+ wait_for_active = false;
+ } else if (m->get_type() == CEPH_MSG_CLIENT_REQUEST) {
+ MClientRequest *req = static_cast<MClientRequest*>(m);
+ if (req->is_queued_for_replay()) {
+ wait_for_active = false;
+ }
+ }
+ }
+ if (wait_for_active) {
+ dout(3) << "not active yet, waiting" << dendl;
+ mds->wait_for_active(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+ }
+
+ switch (m->get_type()) {
+ case CEPH_MSG_CLIENT_SESSION:
+ handle_client_session(static_cast<MClientSession*>(m));
+ return;
+ case CEPH_MSG_CLIENT_REQUEST:
+ handle_client_request(static_cast<MClientRequest*>(m));
+ return;
+ case MSG_MDS_SLAVE_REQUEST:
+ handle_slave_request(static_cast<MMDSSlaveRequest*>(m));
+ return;
+ default:
+ derr << "server unknown message " << m->get_type() << dendl;
+ assert(0 == "server unknown message");
+ }
+}
+
+
+
+// ----------------------------------------------------------
+// SESSION management
+
+class C_MDS_session_finish : public ServerLogContext {
+ Session *session;
+ uint64_t state_seq;
+ bool open;
+ version_t cmapv;
+ interval_set<inodeno_t> inos;
+ version_t inotablev;
+ Context *fin;
+public:
+ C_MDS_session_finish(Server *srv, Session *se, uint64_t sseq, bool s, version_t mv, Context *fin_ = NULL) :
+ ServerLogContext(srv), session(se), state_seq(sseq), open(s), cmapv(mv), inotablev(0), fin(fin_) { }
+ C_MDS_session_finish(Server *srv, Session *se, uint64_t sseq, bool s, version_t mv, interval_set<inodeno_t>& i, version_t iv, Context *fin_ = NULL) :
+ ServerLogContext(srv), session(se), state_seq(sseq), open(s), cmapv(mv), inos(i), inotablev(iv), fin(fin_) { }
+ void finish(int r) override {
+ assert(r == 0);
+ server->_session_logged(session, state_seq, open, cmapv, inos, inotablev);
+ if (fin) {
+ fin->complete(r);
+ }
+ }
+};
+
+Session *Server::get_session(Message *m)
+{
+ Session *session = static_cast<Session *>(m->get_connection()->get_priv());
+ if (session) {
+ dout(20) << "get_session have " << session << " " << session->info.inst
+ << " state " << session->get_state_name() << dendl;
+ session->put(); // not carry ref
+ } else {
+ dout(20) << "get_session dne for " << m->get_source_inst() << dendl;
+ }
+ return session;
+}
+
+/* This function DOES put the passed message before returning*/
+void Server::handle_client_session(MClientSession *m)
+{
+ version_t pv;
+ bool blacklisted = false;
+ Session *session = get_session(m);
+
+ dout(3) << "handle_client_session " << *m << " from " << m->get_source() << dendl;
+ assert(m->get_source().is_client()); // should _not_ come from an mds!
+
+ if (!session) {
+ dout(0) << " ignoring sessionless msg " << *m << dendl;
+ m->put();
+ return;
+ }
+
+ if (logger)
+ logger->inc(l_mdss_handle_client_session);
+
+ uint64_t sseq = 0;
+ switch (m->get_op()) {
+ case CEPH_SESSION_REQUEST_OPEN:
+ if (session->is_opening() ||
+ session->is_open() ||
+ session->is_stale() ||
+ session->is_killing()) {
+ dout(10) << "currently open|opening|stale|killing, dropping this req" << dendl;
+ // set client metadata for session opened by prepare_force_open_sessions
+ if (!m->client_meta.empty())
+ session->set_client_metadata(m->client_meta);
+ m->put();
+ return;
+ }
+ assert(session->is_closed() ||
+ session->is_closing());
+
+ blacklisted = mds->objecter->with_osdmap(
+ [session](const OSDMap &osd_map) -> bool {
+ return osd_map.is_blacklisted(session->info.inst.addr);
+ });
+
+ if (blacklisted) {
+ dout(10) << "ignoring blacklisted client " << session->info.inst.addr << dendl;
+ m->put();
+ return;
+ }
+
+ session->set_client_metadata(m->client_meta);
+ dout(20) << __func__ << " CEPH_SESSION_REQUEST_OPEN "
+ << session->info.client_metadata.size() << " metadata entries:" << dendl;
+ for (map<string, string>::iterator i = session->info.client_metadata.begin();
+ i != session->info.client_metadata.end(); ++i) {
+ dout(20) << " " << i->first << ": " << i->second << dendl;
+ }
+
+ // Special case for the 'root' metadata path; validate that the claimed
+ // root is actually within the caps of the session
+ if (session->info.client_metadata.count("root")) {
+ const auto claimed_root = session->info.client_metadata.at("root");
+ // claimed_root has a leading "/" which we strip before passing
+ // into caps check
+ if (claimed_root.empty() || claimed_root[0] != '/' ||
+ !session->auth_caps.path_capable(claimed_root.substr(1))) {
+ derr << __func__ << " forbidden path claimed as mount root: "
+ << claimed_root << " by " << m->get_source() << dendl;
+ // Tell the client we're rejecting their open
+ mds->send_message_client(new MClientSession(CEPH_SESSION_REJECT), session);
+ mds->clog->warn() << "client session with invalid root '" <<
+ claimed_root << "' denied (" << session->info.inst << ")";
+ session->clear();
+ // Drop out; don't record this session in SessionMap or journal it.
+ break;
+ }
+ }
+
+ if (session->is_closed())
+ mds->sessionmap.add_session(session);
+
+ pv = mds->sessionmap.mark_projected(session);
+ sseq = mds->sessionmap.set_state(session, Session::STATE_OPENING);
+ mds->sessionmap.touch_session(session);
+ mdlog->start_submit_entry(new ESession(m->get_source_inst(), true, pv, m->client_meta),
+ new C_MDS_session_finish(this, session, sseq, true, pv));
+ mdlog->flush();
+ break;
+
+ case CEPH_SESSION_REQUEST_RENEWCAPS:
+ if (session->is_open() ||
+ session->is_stale()) {
+ mds->sessionmap.touch_session(session);
+ if (session->is_stale()) {
+ mds->sessionmap.set_state(session, Session::STATE_OPEN);
+ mds->locker->resume_stale_caps(session);
+ mds->sessionmap.touch_session(session);
+ }
+ m->get_connection()->send_message(new MClientSession(CEPH_SESSION_RENEWCAPS, m->get_seq()));
+ } else {
+ dout(10) << "ignoring renewcaps on non open|stale session (" << session->get_state_name() << ")" << dendl;
+ }
+ break;
+
+ case CEPH_SESSION_REQUEST_CLOSE:
+ {
+ if (session->is_closed() ||
+ session->is_closing() ||
+ session->is_killing()) {
+ dout(10) << "already closed|closing|killing, dropping this req" << dendl;
+ m->put();
+ return;
+ }
+ if (session->is_importing()) {
+ dout(10) << "ignoring close req on importing session" << dendl;
+ m->put();
+ return;
+ }
+ assert(session->is_open() ||
+ session->is_stale() ||
+ session->is_opening());
+ if (m->get_seq() < session->get_push_seq()) {
+ dout(10) << "old push seq " << m->get_seq() << " < " << session->get_push_seq()
+ << ", dropping" << dendl;
+ m->put();
+ return;
+ }
+ // We are getting a seq that is higher than expected.
+ // Handle the same as any other seqn error.
+ //
+ if (m->get_seq() != session->get_push_seq()) {
+ dout(0) << "old push seq " << m->get_seq() << " != " << session->get_push_seq()
+ << ", BUGGY!" << dendl;
+ mds->clog->warn() << "incorrect push seq " << m->get_seq() << " != "
+ << session->get_push_seq() << ", dropping" << " from client : " << session->get_human_name();
+ m->put();
+ return;
+ }
+ journal_close_session(session, Session::STATE_CLOSING, NULL);
+ }
+ break;
+
+ case CEPH_SESSION_FLUSHMSG_ACK:
+ finish_flush_session(session, m->get_seq());
+ break;
+
+ case CEPH_SESSION_REQUEST_FLUSH_MDLOG:
+ mdlog->flush();
+ break;
+
+ default:
+ ceph_abort();
+ }
+ m->put();
+}
+
+void Server::flush_client_sessions(set<client_t>& client_set, MDSGatherBuilder& gather)
+{
+ for (set<client_t>::iterator p = client_set.begin(); p != client_set.end(); ++p) {
+ Session *session = mds->sessionmap.get_session(entity_name_t::CLIENT(p->v));
+ assert(session);
+ if (!session->is_open() ||
+ !session->connection.get() ||
+ !session->connection->has_feature(CEPH_FEATURE_EXPORT_PEER))
+ continue;
+ version_t seq = session->wait_for_flush(gather.new_sub());
+ mds->send_message_client(new MClientSession(CEPH_SESSION_FLUSHMSG, seq), session);
+ }
+}
+
+void Server::finish_flush_session(Session *session, version_t seq)
+{
+ list<MDSInternalContextBase*> finished;
+ session->finish_flush(seq, finished);
+ mds->queue_waiters(finished);
+}
+
+void Server::_session_logged(Session *session, uint64_t state_seq, bool open, version_t pv,
+ interval_set<inodeno_t>& inos, version_t piv)
+{
+ dout(10) << "_session_logged " << session->info.inst << " state_seq " << state_seq << " " << (open ? "open":"close")
+ << " " << pv << dendl;
+
+ if (piv) {
+ assert(session->is_closing() || session->is_killing() ||
+ session->is_opening()); // re-open closing session
+ session->info.prealloc_inos.subtract(inos);
+ mds->inotable->apply_release_ids(inos);
+ assert(mds->inotable->get_version() == piv);
+ }
+
+ mds->sessionmap.mark_dirty(session);
+
+ // apply
+ if (session->get_state_seq() != state_seq) {
+ dout(10) << " journaled state_seq " << state_seq << " != current " << session->get_state_seq()
+ << ", noop" << dendl;
+ // close must have been canceled (by an import?), or any number of other things..
+ } else if (open) {
+ assert(session->is_opening());
+ mds->sessionmap.set_state(session, Session::STATE_OPEN);
+ mds->sessionmap.touch_session(session);
+ assert(session->connection != NULL);
+ session->connection->send_message(new MClientSession(CEPH_SESSION_OPEN));
+ if (mdcache->is_readonly())
+ session->connection->send_message(new MClientSession(CEPH_SESSION_FORCE_RO));
+ } else if (session->is_closing() ||
+ session->is_killing()) {
+ // kill any lingering capabilities, leases, requests
+ while (!session->caps.empty()) {
+ Capability *cap = session->caps.front();
+ CInode *in = cap->get_inode();
+ dout(20) << " killing capability " << ccap_string(cap->issued()) << " on " << *in << dendl;
+ mds->locker->remove_client_cap(in, session->info.inst.name.num());
+ }
+ while (!session->leases.empty()) {
+ ClientLease *r = session->leases.front();
+ CDentry *dn = static_cast<CDentry*>(r->parent);
+ dout(20) << " killing client lease of " << *dn << dendl;
+ dn->remove_client_lease(r, mds->locker);
+ }
+ if (client_reconnect_gather.count(session->info.get_client())) {
+ dout(20) << " removing client from reconnect set" << dendl;
+ client_reconnect_gather.erase(session->info.get_client());
+
+ if (client_reconnect_gather.empty()) {
+ dout(7) << " client " << session->info.inst << " was last reconnect, finishing" << dendl;
+ reconnect_gather_finish();
+ }
+ }
+
+ if (session->is_closing()) {
+ // mark con disposable. if there is a fault, we will get a
+ // reset and clean it up. if the client hasn't received the
+ // CLOSE message yet, they will reconnect and get an
+ // ms_handle_remote_reset() and realize they had in fact closed.
+ // do this *before* sending the message to avoid a possible
+ // race.
+ if (session->connection != NULL) {
+ // Conditional because terminate_sessions will indiscrimately
+ // put sessions in CLOSING whether they ever had a conn or not.
+ session->connection->mark_disposable();
+ }
+
+ // reset session
+ mds->send_message_client(new MClientSession(CEPH_SESSION_CLOSE), session);
+ mds->sessionmap.set_state(session, Session::STATE_CLOSED);
+ session->clear();
+ mds->sessionmap.remove_session(session);
+ } else if (session->is_killing()) {
+ // destroy session, close connection
+ if (session->connection != NULL) {
+ session->connection->mark_down();
+ }
+ mds->sessionmap.remove_session(session);
+ } else {
+ ceph_abort();
+ }
+ } else {
+ ceph_abort();
+ }
+}
+
+/**
+ * Inject sessions from some source other than actual connections.
+ *
+ * For example:
+ * - sessions inferred from journal replay
+ * - sessions learned from other MDSs during rejoin
+ * - sessions learned from other MDSs during dir/caps migration
+ * - sessions learned from other MDSs during a cross-MDS rename
+ */
+version_t Server::prepare_force_open_sessions(map<client_t,entity_inst_t>& cm,
+ map<client_t,uint64_t>& sseqmap)
+{
+ version_t pv = mds->sessionmap.get_projected();
+
+ dout(10) << "prepare_force_open_sessions " << pv
+ << " on " << cm.size() << " clients"
+ << dendl;
+ for (map<client_t,entity_inst_t>::iterator p = cm.begin(); p != cm.end(); ++p) {
+
+ Session *session = mds->sessionmap.get_or_add_session(p->second);
+ pv = mds->sessionmap.mark_projected(session);
+ if (session->is_closed() ||
+ session->is_closing() ||
+ session->is_killing())
+ sseqmap[p->first] = mds->sessionmap.set_state(session, Session::STATE_OPENING);
+ else
+ assert(session->is_open() ||
+ session->is_opening() ||
+ session->is_stale());
+ session->inc_importing();
+ }
+ return pv;
+}
+
+void Server::finish_force_open_sessions(map<client_t,entity_inst_t>& cm,
+ map<client_t,uint64_t>& sseqmap,
+ bool dec_import)
+{
+ /*
+ * FIXME: need to carefully consider the race conditions between a
+ * client trying to close a session and an MDS doing an import
+ * trying to force open a session...
+ */
+ dout(10) << "finish_force_open_sessions on " << cm.size() << " clients,"
+ << " initial v " << mds->sessionmap.get_version() << dendl;
+
+
+ for (map<client_t,entity_inst_t>::iterator p = cm.begin(); p != cm.end(); ++p) {
+
+ Session *session = mds->sessionmap.get_session(p->second.name);
+ assert(session);
+
+ if (sseqmap.count(p->first)) {
+ uint64_t sseq = sseqmap[p->first];
+ if (session->get_state_seq() != sseq) {
+ dout(10) << "force_open_sessions skipping changed " << session->info.inst << dendl;
+ } else {
+ dout(10) << "force_open_sessions opened " << session->info.inst << dendl;
+ mds->sessionmap.set_state(session, Session::STATE_OPEN);
+ mds->sessionmap.touch_session(session);
+ mds->send_message_client(new MClientSession(CEPH_SESSION_OPEN), session);
+ if (mdcache->is_readonly())
+ mds->send_message_client(new MClientSession(CEPH_SESSION_FORCE_RO), session);
+ }
+ } else {
+ dout(10) << "force_open_sessions skipping already-open " << session->info.inst << dendl;
+ assert(session->is_open() || session->is_stale());
+ }
+
+ if (dec_import) {
+ session->dec_importing();
+ }
+
+ mds->sessionmap.mark_dirty(session);
+ }
+
+ dout(10) << __func__ << ": final v " << mds->sessionmap.get_version() << dendl;
+}
+
+class C_MDS_TerminatedSessions : public ServerContext {
+ void finish(int r) override {
+ server->terminating_sessions = false;
+ }
+ public:
+ explicit C_MDS_TerminatedSessions(Server *s) : ServerContext(s) {}
+};
+
+void Server::terminate_sessions()
+{
+ dout(2) << "terminate_sessions" << dendl;
+
+ terminating_sessions = true;
+
+ // kill them off. clients will retry etc.
+ set<Session*> sessions;
+ mds->sessionmap.get_client_session_set(sessions);
+ for (set<Session*>::const_iterator p = sessions.begin();
+ p != sessions.end();
+ ++p) {
+ Session *session = *p;
+ if (session->is_closing() ||
+ session->is_killing() ||
+ session->is_closed())
+ continue;
+ journal_close_session(session, Session::STATE_CLOSING, NULL);
+ }
+
+ mdlog->wait_for_safe(new C_MDS_TerminatedSessions(this));
+}
+
+
+void Server::find_idle_sessions()
+{
+ dout(10) << "find_idle_sessions. laggy until " << mds->get_laggy_until() << dendl;
+
+ // timeout/stale
+ // (caps go stale, lease die)
+ utime_t now = ceph_clock_now();
+ utime_t cutoff = now;
+ cutoff -= g_conf->mds_session_timeout;
+ while (1) {
+ Session *session = mds->sessionmap.get_oldest_session(Session::STATE_OPEN);
+ if (!session) break;
+ dout(20) << "laggiest active session is " << session->info.inst << dendl;
+ if (session->last_cap_renew >= cutoff) {
+ dout(20) << "laggiest active session is " << session->info.inst << " and sufficiently new ("
+ << session->last_cap_renew << ")" << dendl;
+ break;
+ }
+
+ dout(10) << "new stale session " << session->info.inst << " last " << session->last_cap_renew << dendl;
+ mds->sessionmap.set_state(session, Session::STATE_STALE);
+ mds->locker->revoke_stale_caps(session);
+ mds->locker->remove_stale_leases(session);
+ mds->send_message_client(new MClientSession(CEPH_SESSION_STALE, session->get_push_seq()), session);
+ finish_flush_session(session, session->get_push_seq());
+ }
+
+ // autoclose
+ cutoff = now;
+ cutoff -= g_conf->mds_session_autoclose;
+
+ // don't kick clients if we've been laggy
+ if (mds->get_laggy_until() > cutoff) {
+ dout(10) << " laggy_until " << mds->get_laggy_until() << " > cutoff " << cutoff
+ << ", not kicking any clients to be safe" << dendl;
+ return;
+ }
+
+ if (mds->sessionmap.get_sessions().size() == 1 &&
+ mds->mdsmap->get_num_in_mds() == 1) {
+ dout(20) << "not evicting a slow client, because there is only one"
+ << dendl;
+ return;
+ }
+
+ // Collect a list of sessions exceeding the autoclose threshold
+ std::vector<Session *> to_evict;
+ const auto sessions_p = mds->sessionmap.by_state.find(Session::STATE_STALE);
+ if (sessions_p == mds->sessionmap.by_state.end() || sessions_p->second->empty()) {
+ return;
+ }
+ const auto &stale_sessions = sessions_p->second;
+ assert(stale_sessions != nullptr);
+
+ for (const auto &session: *stale_sessions) {
+ if (session->is_importing()) {
+ dout(10) << "stopping at importing session " << session->info.inst << dendl;
+ break;
+ }
+ assert(session->is_stale());
+ if (session->last_cap_renew >= cutoff) {
+ dout(20) << "oldest stale session is " << session->info.inst << " and sufficiently new ("
+ << session->last_cap_renew << ")" << dendl;
+ break;
+ }
+
+ to_evict.push_back(session);
+ }
+
+ for (const auto &session: to_evict) {
+ utime_t age = now;
+ age -= session->last_cap_renew;
+ mds->clog->warn() << "evicting unresponsive client " << *session
+ << ", after " << age << " seconds";
+ dout(10) << "autoclosing stale session " << session->info.inst << " last "
+ << session->last_cap_renew << dendl;
+
+ if (g_conf->mds_session_blacklist_on_timeout) {
+ std::stringstream ss;
+ mds->evict_client(session->info.inst.name.num(), false, true,
+ ss, nullptr);
+ } else {
+ kill_session(session, NULL);
+ }
+ }
+}
+
+/*
+ * XXX bump in the interface here, not using an MDSInternalContextBase here
+ * because all the callers right now happen to use a SaferCond
+ */
+void Server::kill_session(Session *session, Context *on_safe)
+{
+ assert(mds->mds_lock.is_locked_by_me());
+
+ if ((session->is_opening() ||
+ session->is_open() ||
+ session->is_stale()) &&
+ !session->is_importing()) {
+ dout(10) << "kill_session " << session << dendl;
+ journal_close_session(session, Session::STATE_KILLING, on_safe);
+ } else {
+ dout(10) << "kill_session importing or already closing/killing " << session << dendl;
+ assert(session->is_closing() ||
+ session->is_closed() ||
+ session->is_killing() ||
+ session->is_importing());
+ if (on_safe) {
+ on_safe->complete(0);
+ }
+ }
+}
+
+size_t Server::apply_blacklist(const std::set<entity_addr_t> &blacklist)
+{
+ std::list<Session*> victims;
+ const auto sessions = mds->sessionmap.get_sessions();
+ for (const auto p : sessions) {
+ if (!p.first.is_client()) {
+ // Do not apply OSDMap blacklist to MDS daemons, we find out
+ // about their death via MDSMap.
+ continue;
+ }
+
+ Session *s = p.second;
+ if (blacklist.count(s->info.inst.addr)) {
+ victims.push_back(s);
+ }
+ }
+
+ for (const auto s : victims) {
+ kill_session(s, nullptr);
+ }
+
+ dout(10) << "apply_blacklist: killed " << victims.size() << dendl;
+
+ return victims.size();
+}
+
+void Server::journal_close_session(Session *session, int state, Context *on_safe)
+{
+ uint64_t sseq = mds->sessionmap.set_state(session, state);
+ version_t pv = mds->sessionmap.mark_projected(session);
+ version_t piv = 0;
+
+ // release alloc and pending-alloc inos for this session
+ // and wipe out session state, in case the session close aborts for some reason
+ interval_set<inodeno_t> both;
+ both.insert(session->info.prealloc_inos);
+ both.insert(session->pending_prealloc_inos);
+ if (both.size()) {
+ mds->inotable->project_release_ids(both);
+ piv = mds->inotable->get_projected_version();
+ } else
+ piv = 0;
+
+ mdlog->start_submit_entry(new ESession(session->info.inst, false, pv, both, piv),
+ new C_MDS_session_finish(this, session, sseq, false, pv, both, piv, on_safe));
+ mdlog->flush();
+
+ // clean up requests, too
+ elist<MDRequestImpl*>::iterator p =
+ session->requests.begin(member_offset(MDRequestImpl,
+ item_session_request));
+ while (!p.end()) {
+ MDRequestRef mdr = mdcache->request_get((*p)->reqid);
+ ++p;
+ mdcache->request_kill(mdr);
+ }
+
+ finish_flush_session(session, session->get_push_seq());
+}
+
+void Server::reconnect_clients(MDSInternalContext *reconnect_done_)
+{
+ reconnect_done = reconnect_done_;
+ mds->sessionmap.get_client_set(client_reconnect_gather);
+
+ if (client_reconnect_gather.empty()) {
+ dout(7) << "reconnect_clients -- no sessions, doing nothing." << dendl;
+ reconnect_gather_finish();
+ return;
+ }
+
+ // clients will get the mdsmap and discover we're reconnecting via the monitor.
+
+ reconnect_start = ceph_clock_now();
+ dout(1) << "reconnect_clients -- " << client_reconnect_gather.size() << " sessions" << dendl;
+ mds->sessionmap.dump();
+}
+
+/* This function DOES put the passed message before returning*/
+void Server::handle_client_reconnect(MClientReconnect *m)
+{
+ dout(7) << "handle_client_reconnect " << m->get_source() << dendl;
+ client_t from = m->get_source().num();
+ Session *session = get_session(m);
+ assert(session);
+
+ if (!mds->is_reconnect() && mds->get_want_state() == CEPH_MDS_STATE_RECONNECT) {
+ dout(10) << " we're almost in reconnect state (mdsmap delivery race?); waiting" << dendl;
+ mds->wait_for_reconnect(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+
+ utime_t delay = ceph_clock_now();
+ delay -= reconnect_start;
+ dout(10) << " reconnect_start " << reconnect_start << " delay " << delay << dendl;
+
+ bool deny = false;
+ if (!mds->is_reconnect()) {
+ // XXX maybe in the future we can do better than this?
+ dout(1) << " no longer in reconnect state, ignoring reconnect, sending close" << dendl;
+ mds->clog->info() << "denied reconnect attempt (mds is "
+ << ceph_mds_state_name(mds->get_state())
+ << ") from " << m->get_source_inst()
+ << " after " << delay << " (allowed interval " << g_conf->mds_reconnect_timeout << ")";
+ deny = true;
+ } else if (session->is_closed()) {
+ dout(1) << " session is closed, ignoring reconnect, sending close" << dendl;
+ mds->clog->info() << "denied reconnect attempt (mds is "
+ << ceph_mds_state_name(mds->get_state())
+ << ") from " << m->get_source_inst() << " (session is closed)";
+ deny = true;
+ } else if (mdcache->is_readonly()) {
+ dout(1) << " read-only FS, ignoring reconnect, sending close" << dendl;
+ mds->clog->info() << "denied reconnect attempt (mds is read-only)";
+ deny = true;
+ }
+
+ if (deny) {
+ m->get_connection()->send_message(new MClientSession(CEPH_SESSION_CLOSE));
+ m->put();
+ return;
+ }
+
+ // notify client of success with an OPEN
+ m->get_connection()->send_message(new MClientSession(CEPH_SESSION_OPEN));
+ session->last_cap_renew = ceph_clock_now();
+ mds->clog->debug() << "reconnect by " << session->info.inst << " after " << delay;
+
+ // snaprealms
+ for (vector<ceph_mds_snaprealm_reconnect>::iterator p = m->realms.begin();
+ p != m->realms.end();
+ ++p) {
+ CInode *in = mdcache->get_inode(inodeno_t(p->ino));
+ if (in && in->state_test(CInode::STATE_PURGING))
+ continue;
+ if (in) {
+ assert(in->snaprealm);
+ if (in->snaprealm->have_past_parents_open()) {
+ dout(15) << "open snaprealm (w/ past parents) on " << *in << dendl;
+ mdcache->finish_snaprealm_reconnect(from, in->snaprealm, snapid_t(p->seq));
+ } else {
+ dout(15) << "open snaprealm (w/o past parents) on " << *in << dendl;
+ mdcache->add_reconnected_snaprealm(from, inodeno_t(p->ino), snapid_t(p->seq));
+ }
+ } else {
+ dout(15) << "open snaprealm (w/o inode) on " << inodeno_t(p->ino)
+ << " seq " << p->seq << dendl;
+ mdcache->add_reconnected_snaprealm(from, inodeno_t(p->ino), snapid_t(p->seq));
+ }
+ }
+
+ // caps
+ for (map<inodeno_t, cap_reconnect_t>::iterator p = m->caps.begin();
+ p != m->caps.end();
+ ++p) {
+ // make sure our last_cap_id is MAX over all issued caps
+ if (p->second.capinfo.cap_id > mdcache->last_cap_id)
+ mdcache->last_cap_id = p->second.capinfo.cap_id;
+
+ CInode *in = mdcache->get_inode(p->first);
+ if (in && in->state_test(CInode::STATE_PURGING))
+ continue;
+ if (in && in->is_auth()) {
+ // we recovered it, and it's ours. take note.
+ dout(15) << "open cap realm " << inodeno_t(p->second.capinfo.snaprealm)
+ << " on " << *in << dendl;
+ in->reconnect_cap(from, p->second, session);
+ mdcache->add_reconnected_cap(from, p->first, p->second);
+ recover_filelocks(in, p->second.flockbl, m->get_orig_source().num());
+ continue;
+ }
+
+ if (in && !in->is_auth()) {
+ // not mine.
+ dout(10) << "non-auth " << *in << ", will pass off to authority" << dendl;
+ // add to cap export list.
+ p->second.path.clear(); // we don't need path
+ mdcache->rejoin_export_caps(p->first, from, p->second,
+ in->authority().first);
+ } else {
+ // don't know if the inode is mine
+ dout(10) << "missing ino " << p->first << ", will load later" << dendl;
+ p->second.path.clear(); // we don't need path
+ mdcache->rejoin_recovered_caps(p->first, from, p->second, MDS_RANK_NONE);
+ }
+ }
+
+ // remove from gather set
+ client_reconnect_gather.erase(from);
+ if (client_reconnect_gather.empty())
+ reconnect_gather_finish();
+
+ m->put();
+}
+
+
+
+void Server::reconnect_gather_finish()
+{
+ dout(7) << "reconnect_gather_finish. failed on " << failed_reconnects << " clients" << dendl;
+ assert(reconnect_done);
+ reconnect_done->complete(0);
+ reconnect_done = NULL;
+}
+
+void Server::reconnect_tick()
+{
+ if (reconnect_evicting) {
+ dout(4) << "reconnect_tick: waiting for evictions" << dendl;
+ return;
+ }
+
+ utime_t reconnect_end = reconnect_start;
+ reconnect_end += g_conf->mds_reconnect_timeout;
+ if (ceph_clock_now() >= reconnect_end &&
+ !client_reconnect_gather.empty()) {
+ dout(10) << "reconnect timed out" << dendl;
+
+ // If we're doing blacklist evictions, use this to wait for them before
+ // proceeding to reconnect_gather_finish
+ MDSGatherBuilder gather(g_ceph_context);
+
+ for (set<client_t>::iterator p = client_reconnect_gather.begin();
+ p != client_reconnect_gather.end();
+ ++p) {
+ Session *session = mds->sessionmap.get_session(entity_name_t::CLIENT(p->v));
+ assert(session);
+ dout(1) << "reconnect gave up on " << session->info.inst << dendl;
+
+ mds->clog->warn() << "evicting unresponsive client " << *session
+ << ", after waiting " << g_conf->mds_reconnect_timeout
+ << " seconds during MDS startup";
+
+ if (g_conf->mds_session_blacklist_on_timeout) {
+ std::stringstream ss;
+ mds->evict_client(session->info.inst.name.num(), false, true, ss,
+ gather.new_sub());
+ } else {
+ kill_session(session, NULL);
+ }
+
+ failed_reconnects++;
+ }
+ client_reconnect_gather.clear();
+
+ if (gather.has_subs()) {
+ dout(1) << "reconnect will complete once clients are evicted" << dendl;
+ gather.set_finisher(new MDSInternalContextWrapper(mds, new FunctionContext(
+ [this](int r){reconnect_gather_finish();})));
+ gather.activate();
+ reconnect_evicting = true;
+ } else {
+ reconnect_gather_finish();
+ }
+ }
+}
+
+void Server::recover_filelocks(CInode *in, bufferlist locks, int64_t client)
+{
+ if (!locks.length()) return;
+ int numlocks;
+ ceph_filelock lock;
+ bufferlist::iterator p = locks.begin();
+ ::decode(numlocks, p);
+ for (int i = 0; i < numlocks; ++i) {
+ ::decode(lock, p);
+ lock.client = client;
+ in->get_fcntl_lock_state()->held_locks.insert(pair<uint64_t, ceph_filelock>(lock.start, lock));
+ ++in->get_fcntl_lock_state()->client_held_lock_counts[client];
+ }
+ ::decode(numlocks, p);
+ for (int i = 0; i < numlocks; ++i) {
+ ::decode(lock, p);
+ lock.client = client;
+ in->get_flock_lock_state()->held_locks.insert(pair<uint64_t, ceph_filelock> (lock.start, lock));
+ ++in->get_flock_lock_state()->client_held_lock_counts[client];
+ }
+}
+
+
+/**
+ * Call this when the MDCache is oversized, to send requests to the clients
+ * to trim some caps, and consequently unpin some inodes in the MDCache so
+ * that it can trim too.
+ */
+void Server::recall_client_state(void)
+{
+ /* try to recall at least 80% of all caps */
+ uint64_t max_caps_per_client = Capability::count() * g_conf->get_val<double>("mds_max_ratio_caps_per_client");
+ uint64_t min_caps_per_client = g_conf->get_val<uint64_t>("mds_min_caps_per_client");
+ if (max_caps_per_client < min_caps_per_client) {
+ dout(0) << "max_caps_per_client " << max_caps_per_client
+ << " < min_caps_per_client " << min_caps_per_client << dendl;
+ max_caps_per_client = min_caps_per_client + 1;
+ }
+
+ /* unless this ratio is smaller: */
+ /* ratio: determine the amount of caps to recall from each client. Use
+ * percentage full over the cache reservation. Cap the ratio at 80% of client
+ * caps. */
+ double ratio = 1.0-fmin(0.80, mdcache->cache_toofull_ratio());
+
+ dout(10) << "recall_client_state " << ratio
+ << ", caps per client " << min_caps_per_client << "-" << max_caps_per_client
+ << dendl;
+
+ set<Session*> sessions;
+ mds->sessionmap.get_client_session_set(sessions);
+ for (auto &session : sessions) {
+ if (!session->is_open() ||
+ !session->info.inst.name.is_client())
+ continue;
+
+ dout(10) << " session " << session->info.inst
+ << " caps " << session->caps.size()
+ << ", leases " << session->leases.size()
+ << dendl;
+
+ uint64_t newlim = MAX(MIN((session->caps.size() * ratio), max_caps_per_client), min_caps_per_client);
+ if (session->caps.size() > newlim) {
+ MClientSession *m = new MClientSession(CEPH_SESSION_RECALL_STATE);
+ m->head.max_caps = newlim;
+ mds->send_message_client(m, session);
+ session->notify_recall_sent(newlim);
+ }
+ }
+}
+
+void Server::force_clients_readonly()
+{
+ dout(10) << "force_clients_readonly" << dendl;
+ set<Session*> sessions;
+ mds->sessionmap.get_client_session_set(sessions);
+ for (set<Session*>::const_iterator p = sessions.begin();
+ p != sessions.end();
+ ++p) {
+ Session *session = *p;
+ if (!session->info.inst.name.is_client() ||
+ !(session->is_open() || session->is_stale()))
+ continue;
+ mds->send_message_client(new MClientSession(CEPH_SESSION_FORCE_RO), session);
+ }
+}
+
+/*******
+ * some generic stuff for finishing off requests
+ */
+void Server::journal_and_reply(MDRequestRef& mdr, CInode *in, CDentry *dn, LogEvent *le, MDSLogContextBase *fin)
+{
+ dout(10) << "journal_and_reply tracei " << in << " tracedn " << dn << dendl;
+ assert(!mdr->has_completed);
+
+ // note trace items for eventual reply.
+ mdr->tracei = in;
+ if (in)
+ mdr->pin(in);
+
+ mdr->tracedn = dn;
+ if (dn)
+ mdr->pin(dn);
+
+ early_reply(mdr, in, dn);
+
+ mdr->committing = true;
+ submit_mdlog_entry(le, fin, mdr, __func__);
+
+ if (mdr->client_request && mdr->client_request->is_queued_for_replay()) {
+ if (mds->queue_one_replay()) {
+ dout(10) << " queued next replay op" << dendl;
+ } else {
+ dout(10) << " journaled last replay op, flushing" << dendl;
+ mdlog->flush();
+ }
+ } else if (mdr->did_early_reply)
+ mds->locker->drop_rdlocks(mdr.get());
+ else
+ mdlog->flush();
+}
+
+void Server::submit_mdlog_entry(LogEvent *le, MDSLogContextBase *fin, MDRequestRef& mdr,
+ const char *event)
+{
+ if (mdr) {
+ string event_str("submit entry: ");
+ event_str += event;
+ mdr->mark_event_string(event_str);
+ }
+ mdlog->submit_entry(le, fin);
+}
+
+/*
+ * send response built from mdr contents and error code; clean up mdr
+ */
+void Server::respond_to_request(MDRequestRef& mdr, int r)
+{
+ if (mdr->client_request) {
+ reply_client_request(mdr, new MClientReply(mdr->client_request, r));
+
+ // add here to avoid counting ops multiple times (e.g., locks, loading)
+ switch(mdr->client_request->get_op()) {
+ case CEPH_MDS_OP_LOOKUPHASH:
+ logger->inc(l_mdss_req_lookuphash);
+ break;
+ case CEPH_MDS_OP_LOOKUPINO:
+ logger->inc(l_mdss_req_lookupino);
+ break;
+ case CEPH_MDS_OP_LOOKUPPARENT:
+ logger->inc(l_mdss_req_lookupparent);
+ break;
+ case CEPH_MDS_OP_LOOKUPNAME:
+ logger->inc(l_mdss_req_lookupname);
+ break;
+ case CEPH_MDS_OP_LOOKUP:
+ logger->inc(l_mdss_req_lookup);
+ break;
+ case CEPH_MDS_OP_LOOKUPSNAP:
+ logger->inc(l_mdss_req_lookupsnap);
+ break;
+ case CEPH_MDS_OP_GETATTR:
+ logger->inc(l_mdss_req_getattr);
+ break;
+ case CEPH_MDS_OP_SETATTR:
+ logger->inc(l_mdss_req_setattr);
+ break;
+ case CEPH_MDS_OP_SETLAYOUT:
+ logger->inc(l_mdss_req_setlayout);
+ break;
+ case CEPH_MDS_OP_SETDIRLAYOUT:
+ logger->inc(l_mdss_req_setdirlayout);
+ break;
+ case CEPH_MDS_OP_SETXATTR:
+ logger->inc(l_mdss_req_setxattr);
+ break;
+ case CEPH_MDS_OP_RMXATTR:
+ logger->inc(l_mdss_req_rmxattr);
+ break;
+ case CEPH_MDS_OP_READDIR:
+ logger->inc(l_mdss_req_readdir);
+ break;
+ case CEPH_MDS_OP_SETFILELOCK:
+ logger->inc(l_mdss_req_setfilelock);
+ break;
+ case CEPH_MDS_OP_GETFILELOCK:
+ logger->inc(l_mdss_req_getfilelock);
+ break;
+ case CEPH_MDS_OP_CREATE:
+ logger->inc(l_mdss_req_create);
+ case CEPH_MDS_OP_OPEN:
+ logger->inc(l_mdss_req_open);
+ break;
+ case CEPH_MDS_OP_MKNOD:
+ logger->inc(l_mdss_req_mknod);
+ break;
+ case CEPH_MDS_OP_LINK:
+ logger->inc(l_mdss_req_link);
+ break;
+ case CEPH_MDS_OP_UNLINK:
+ logger->inc(l_mdss_req_unlink);
+ break;
+ case CEPH_MDS_OP_RMDIR:
+ logger->inc(l_mdss_req_rmdir);
+ break;
+ case CEPH_MDS_OP_RENAME:
+ logger->inc(l_mdss_req_rename);
+ break;
+ case CEPH_MDS_OP_MKDIR:
+ logger->inc(l_mdss_req_mkdir);
+ break;
+ case CEPH_MDS_OP_SYMLINK:
+ logger->inc(l_mdss_req_symlink);
+ break;
+ case CEPH_MDS_OP_LSSNAP:
+ logger->inc(l_mdss_req_lssnap);
+ break;
+ case CEPH_MDS_OP_MKSNAP:
+ logger->inc(l_mdss_req_mksnap);
+ break;
+ case CEPH_MDS_OP_RMSNAP:
+ logger->inc(l_mdss_req_rmsnap);
+ break;
+ case CEPH_MDS_OP_RENAMESNAP:
+ logger->inc(l_mdss_req_renamesnap);
+ break;
+ }
+ } else if (mdr->internal_op > -1) {
+ dout(10) << "respond_to_request on internal request " << mdr << dendl;
+ if (!mdr->internal_op_finish)
+ assert(0 == "trying to respond to internal op without finisher");
+ mdr->internal_op_finish->complete(r);
+ mdcache->request_finish(mdr);
+ }
+}
+
+void Server::early_reply(MDRequestRef& mdr, CInode *tracei, CDentry *tracedn)
+{
+ if (!g_conf->mds_early_reply)
+ return;
+
+ if (mdr->has_more() && mdr->more()->has_journaled_slaves) {
+ dout(10) << "early_reply - there are journaled slaves, not allowed." << dendl;
+ return;
+ }
+
+ if (mdr->alloc_ino) {
+ dout(10) << "early_reply - allocated ino, not allowed" << dendl;
+ return;
+ }
+
+ MClientRequest *req = mdr->client_request;
+ entity_inst_t client_inst = req->get_source_inst();
+ if (client_inst.name.is_mds())
+ return;
+
+ if (req->is_replay()) {
+ dout(10) << " no early reply on replay op" << dendl;
+ return;
+ }
+
+
+ MClientReply *reply = new MClientReply(req, 0);
+ reply->set_unsafe();
+
+ // mark xlocks "done", indicating that we are exposing uncommitted changes.
+ //
+ //_rename_finish() does not send dentry link/unlink message to replicas.
+ // so do not set xlocks on dentries "done", the xlocks prevent dentries
+ // that have projected linkages from getting new replica.
+ mds->locker->set_xlocks_done(mdr.get(), req->get_op() == CEPH_MDS_OP_RENAME);
+
+ dout(10) << "early_reply " << reply->get_result()
+ << " (" << cpp_strerror(reply->get_result())
+ << ") " << *req << dendl;
+
+ if (tracei || tracedn) {
+ if (tracei)
+ mdr->cap_releases.erase(tracei->vino());
+ if (tracedn)
+ mdr->cap_releases.erase(tracedn->get_dir()->get_inode()->vino());
+
+ set_trace_dist(mdr->session, reply, tracei, tracedn, mdr->snapid,
+ req->get_dentry_wanted(), mdr);
+ }
+
+ reply->set_extra_bl(mdr->reply_extra_bl);
+ req->get_connection()->send_message(reply);
+
+ mdr->did_early_reply = true;
+
+ mds->logger->inc(l_mds_reply);
+ utime_t lat = ceph_clock_now() - req->get_recv_stamp();
+ mds->logger->tinc(l_mds_reply_latency, lat);
+ dout(20) << "lat " << lat << dendl;
+
+ mdr->mark_event("early_replied");
+}
+
+/*
+ * send given reply
+ * include a trace to tracei
+ * Clean up mdr
+ */
+void Server::reply_client_request(MDRequestRef& mdr, MClientReply *reply)
+{
+ assert(mdr.get());
+ MClientRequest *req = mdr->client_request;
+
+ dout(7) << "reply_client_request " << reply->get_result()
+ << " (" << cpp_strerror(reply->get_result())
+ << ") " << *req << dendl;
+
+ mdr->mark_event("replying");
+
+ Session *session = mdr->session;
+
+ // note successful request in session map?
+ //
+ // setfilelock requests are special, they only modify states in MDS memory.
+ // The states get lost when MDS fails. If Client re-send a completed
+ // setfilelock request, it means that client did not receive corresponding
+ // setfilelock reply. So MDS should re-execute the setfilelock request.
+ if (req->may_write() && req->get_op() != CEPH_MDS_OP_SETFILELOCK &&
+ reply->get_result() == 0 && session) {
+ inodeno_t created = mdr->alloc_ino ? mdr->alloc_ino : mdr->used_prealloc_ino;
+ session->add_completed_request(mdr->reqid.tid, created);
+ if (mdr->ls) {
+ mdr->ls->touched_sessions.insert(session->info.inst.name);
+ }
+ }
+
+ // give any preallocated inos to the session
+ apply_allocated_inos(mdr, session);
+
+ // get tracei/tracedn from mdr?
+ snapid_t snapid = mdr->snapid;
+ CInode *tracei = mdr->tracei;
+ CDentry *tracedn = mdr->tracedn;
+
+ bool is_replay = mdr->client_request->is_replay();
+ bool did_early_reply = mdr->did_early_reply;
+ entity_inst_t client_inst = req->get_source_inst();
+ int dentry_wanted = req->get_dentry_wanted();
+
+ if (!did_early_reply && !is_replay) {
+
+ mds->logger->inc(l_mds_reply);
+ utime_t lat = ceph_clock_now() - mdr->client_request->get_recv_stamp();
+ mds->logger->tinc(l_mds_reply_latency, lat);
+ dout(20) << "lat " << lat << dendl;
+
+ if (tracei)
+ mdr->cap_releases.erase(tracei->vino());
+ if (tracedn)
+ mdr->cap_releases.erase(tracedn->get_dir()->get_inode()->vino());
+ }
+
+ // drop non-rdlocks before replying, so that we can issue leases
+ mdcache->request_drop_non_rdlocks(mdr);
+
+ // reply at all?
+ if (client_inst.name.is_mds() || !session) {
+ reply->put(); // mds doesn't need a reply
+ reply = 0;
+ } else {
+ // send reply.
+ if (!did_early_reply && // don't issue leases if we sent an earlier reply already
+ (tracei || tracedn)) {
+ if (is_replay) {
+ if (tracei)
+ mdcache->try_reconnect_cap(tracei, session);
+ } else {
+ // include metadata in reply
+ set_trace_dist(session, reply, tracei, tracedn,
+ snapid, dentry_wanted,
+ mdr);
+ }
+ }
+
+ // We can set the extra bl unconditionally: if it's already been sent in the
+ // early_reply, set_extra_bl will have claimed it and reply_extra_bl is empty
+ reply->set_extra_bl(mdr->reply_extra_bl);
+
+ reply->set_mdsmap_epoch(mds->mdsmap->get_epoch());
+ req->get_connection()->send_message(reply);
+ }
+
+ if (req->is_queued_for_replay() &&
+ (mdr->has_completed || reply->get_result() < 0)) {
+ if (reply->get_result() < 0) {
+ int r = reply->get_result();
+ derr << "reply_client_request: failed to replay " << *req
+ << " error " << r << " (" << cpp_strerror(r) << ")" << dendl;
+ mds->clog->warn() << "failed to replay " << req->get_reqid() << " error " << r;
+ }
+ mds->queue_one_replay();
+ }
+
+ // clean up request
+ mdcache->request_finish(mdr);
+
+ // take a closer look at tracei, if it happens to be a remote link
+ if (tracei &&
+ tracedn &&
+ tracedn->get_projected_linkage()->is_remote()) {
+ mdcache->eval_remote(tracedn);
+ }
+}
+
+
+void Server::encode_empty_dirstat(bufferlist& bl)
+{
+ static DirStat empty;
+ empty.encode(bl);
+}
+
+void Server::encode_infinite_lease(bufferlist& bl)
+{
+ LeaseStat e;
+ e.seq = 0;
+ e.mask = -1;
+ e.duration_ms = -1;
+ ::encode(e, bl);
+ dout(20) << "encode_infinite_lease " << e << dendl;
+}
+
+void Server::encode_null_lease(bufferlist& bl)
+{
+ LeaseStat e;
+ e.seq = 0;
+ e.mask = 0;
+ e.duration_ms = 0;
+ ::encode(e, bl);
+ dout(20) << "encode_null_lease " << e << dendl;
+}
+
+
+/*
+ * pass inode OR dentry (not both, or we may get confused)
+ *
+ * trace is in reverse order (i.e. root inode comes last)
+ */
+void Server::set_trace_dist(Session *session, MClientReply *reply,
+ CInode *in, CDentry *dn,
+ snapid_t snapid,
+ int dentry_wanted,
+ MDRequestRef& mdr)
+{
+ // skip doing this for debugging purposes?
+ if (g_conf->mds_inject_traceless_reply_probability &&
+ mdr->ls && !mdr->o_trunc &&
+ (rand() % 10000 < g_conf->mds_inject_traceless_reply_probability * 10000.0)) {
+ dout(5) << "deliberately skipping trace for " << *reply << dendl;
+ return;
+ }
+
+ // inode, dentry, dir, ..., inode
+ bufferlist bl;
+ mds_rank_t whoami = mds->get_nodeid();
+ client_t client = session->get_client();
+ utime_t now = ceph_clock_now();
+
+ dout(20) << "set_trace_dist snapid " << snapid << dendl;
+
+ //assert((bool)dn == (bool)dentry_wanted); // not true for snapshot lookups
+
+ // realm
+ if (snapid == CEPH_NOSNAP) {
+ SnapRealm *realm;
+ if (in)
+ realm = in->find_snaprealm();
+ else
+ realm = dn->get_dir()->get_inode()->find_snaprealm();
+ reply->snapbl = realm->get_snap_trace();
+ dout(10) << "set_trace_dist snaprealm " << *realm << " len=" << reply->snapbl.length() << dendl;
+ }
+
+ // dir + dentry?
+ if (dn) {
+ reply->head.is_dentry = 1;
+ CDir *dir = dn->get_dir();
+ CInode *diri = dir->get_inode();
+
+ diri->encode_inodestat(bl, session, NULL, snapid);
+ dout(20) << "set_trace_dist added diri " << *diri << dendl;
+
+#ifdef MDS_VERIFY_FRAGSTAT
+ if (dir->is_complete())
+ dir->verify_fragstat();
+#endif
+ dir->encode_dirstat(bl, whoami);
+ dout(20) << "set_trace_dist added dir " << *dir << dendl;
+
+ ::encode(dn->get_name(), bl);
+ if (snapid == CEPH_NOSNAP)
+ mds->locker->issue_client_lease(dn, client, bl, now, session);
+ else
+ encode_null_lease(bl);
+ dout(20) << "set_trace_dist added dn " << snapid << " " << *dn << dendl;
+ } else
+ reply->head.is_dentry = 0;
+
+ // inode
+ if (in) {
+ in->encode_inodestat(bl, session, NULL, snapid, 0, mdr->getattr_caps);
+ dout(20) << "set_trace_dist added in " << *in << dendl;
+ reply->head.is_target = 1;
+ } else
+ reply->head.is_target = 0;
+
+ reply->set_trace(bl);
+}
+
+
+
+
+/***
+ * process a client request
+ * This function DOES put the passed message before returning
+ */
+void Server::handle_client_request(MClientRequest *req)
+{
+ dout(4) << "handle_client_request " << *req << dendl;
+
+ if (mds->logger)
+ mds->logger->inc(l_mds_request);
+ if (logger)
+ logger->inc(l_mdss_handle_client_request);
+
+ if (!mdcache->is_open()) {
+ dout(5) << "waiting for root" << dendl;
+ mdcache->wait_for_open(new C_MDS_RetryMessage(mds, req));
+ return;
+ }
+
+ // active session?
+ Session *session = 0;
+ if (req->get_source().is_client()) {
+ session = get_session(req);
+ if (!session) {
+ dout(5) << "no session for " << req->get_source() << ", dropping" << dendl;
+ } else if (session->is_closed() ||
+ session->is_closing() ||
+ session->is_killing()) {
+ dout(5) << "session closed|closing|killing, dropping" << dendl;
+ session = NULL;
+ }
+ if (!session) {
+ if (req->is_queued_for_replay())
+ mds->queue_one_replay();
+ req->put();
+ return;
+ }
+ }
+
+ // old mdsmap?
+ if (req->get_mdsmap_epoch() < mds->mdsmap->get_epoch()) {
+ // send it? hrm, this isn't ideal; they may get a lot of copies if
+ // they have a high request rate.
+ }
+
+ // completed request?
+ bool has_completed = false;
+ if (req->is_replay() || req->get_retry_attempt()) {
+ assert(session);
+ inodeno_t created;
+ if (session->have_completed_request(req->get_reqid().tid, &created)) {
+ has_completed = true;
+ // Don't send traceless reply if the completed request has created
+ // new inode. Treat the request as lookup request instead.
+ if (req->is_replay() ||
+ ((created == inodeno_t() || !mds->is_clientreplay()) &&
+ req->get_op() != CEPH_MDS_OP_OPEN &&
+ req->get_op() != CEPH_MDS_OP_CREATE)) {
+ dout(5) << "already completed " << req->get_reqid() << dendl;
+ MClientReply *reply = new MClientReply(req, 0);
+ if (created != inodeno_t()) {
+ bufferlist extra;
+ ::encode(created, extra);
+ reply->set_extra_bl(extra);
+ }
+ req->get_connection()->send_message(reply);
+
+ if (req->is_queued_for_replay())
+ mds->queue_one_replay();
+
+ req->put();
+ return;
+ }
+ if (req->get_op() != CEPH_MDS_OP_OPEN &&
+ req->get_op() != CEPH_MDS_OP_CREATE) {
+ dout(10) << " completed request which created new inode " << created
+ << ", convert it to lookup request" << dendl;
+ req->head.op = req->get_dentry_wanted() ? CEPH_MDS_OP_LOOKUP : CEPH_MDS_OP_GETATTR;
+ req->head.args.getattr.mask = CEPH_STAT_CAP_INODE_ALL;
+ }
+ }
+ }
+
+ // trim completed_request list
+ if (req->get_oldest_client_tid() > 0) {
+ dout(15) << " oldest_client_tid=" << req->get_oldest_client_tid() << dendl;
+ assert(session);
+ if (session->trim_completed_requests(req->get_oldest_client_tid())) {
+ // Sessions 'completed_requests' was dirtied, mark it to be
+ // potentially flushed at segment expiry.
+ mdlog->get_current_segment()->touched_sessions.insert(session->info.inst.name);
+
+ if (session->get_num_trim_requests_warnings() > 0 &&
+ session->get_num_completed_requests() * 2 < g_conf->mds_max_completed_requests)
+ session->reset_num_trim_requests_warnings();
+ } else {
+ if (session->get_num_completed_requests() >=
+ (g_conf->mds_max_completed_requests << session->get_num_trim_requests_warnings())) {
+ session->inc_num_trim_requests_warnings();
+ stringstream ss;
+ ss << "client." << session->get_client() << " does not advance its oldest_client_tid ("
+ << req->get_oldest_client_tid() << "), "
+ << session->get_num_completed_requests()
+ << " completed requests recorded in session\n";
+ mds->clog->warn() << ss.str();
+ dout(20) << __func__ << " " << ss.str() << dendl;
+ }
+ }
+ }
+
+ // register + dispatch
+ MDRequestRef mdr = mdcache->request_start(req);
+ if (!mdr.get())
+ return;
+
+ if (session) {
+ mdr->session = session;
+ session->requests.push_back(&mdr->item_session_request);
+ }
+
+ if (has_completed)
+ mdr->has_completed = true;
+
+ // process embedded cap releases?
+ // (only if NOT replay!)
+ if (!req->releases.empty() && req->get_source().is_client() && !req->is_replay()) {
+ client_t client = req->get_source().num();
+ for (vector<MClientRequest::Release>::iterator p = req->releases.begin();
+ p != req->releases.end();
+ ++p)
+ mds->locker->process_request_cap_release(mdr, client, p->item, p->dname);
+ req->releases.clear();
+ }
+
+ dispatch_client_request(mdr);
+ return;
+}
+
+void Server::handle_osd_map()
+{
+ /* Note that we check the OSDMAP_FULL flag directly rather than
+ * using osdmap_full_flag(), because we want to know "is the flag set"
+ * rather than "does the flag apply to us?" */
+ mds->objecter->with_osdmap([this](const OSDMap& o) {
+ is_full = o.test_flag(CEPH_OSDMAP_FULL);
+ dout(7) << __func__ << ": full = " << is_full << " epoch = "
+ << o.get_epoch() << dendl;
+ });
+}
+
+void Server::dispatch_client_request(MDRequestRef& mdr)
+{
+ // we shouldn't be waiting on anyone.
+ assert(!mdr->has_more() || mdr->more()->waiting_on_slave.empty());
+
+ if (mdr->killed) {
+ dout(10) << "request " << *mdr << " was killed" << dendl;
+ return;
+ }
+
+ MClientRequest *req = mdr->client_request;
+
+ if (logger) logger->inc(l_mdss_dispatch_client_request);
+
+ dout(7) << "dispatch_client_request " << *req << dendl;
+
+ if (req->may_write()) {
+ if (mdcache->is_readonly()) {
+ dout(10) << " read-only FS" << dendl;
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ if (mdr->has_more() && mdr->more()->slave_error) {
+ dout(10) << " got error from slaves" << dendl;
+ respond_to_request(mdr, mdr->more()->slave_error);
+ return;
+ }
+ }
+
+ if (is_full) {
+ if (req->get_op() == CEPH_MDS_OP_SETLAYOUT ||
+ req->get_op() == CEPH_MDS_OP_SETDIRLAYOUT ||
+ req->get_op() == CEPH_MDS_OP_SETLAYOUT ||
+ req->get_op() == CEPH_MDS_OP_RMXATTR ||
+ req->get_op() == CEPH_MDS_OP_SETXATTR ||
+ req->get_op() == CEPH_MDS_OP_CREATE ||
+ req->get_op() == CEPH_MDS_OP_SYMLINK ||
+ req->get_op() == CEPH_MDS_OP_MKSNAP ||
+ ((req->get_op() == CEPH_MDS_OP_LINK ||
+ req->get_op() == CEPH_MDS_OP_RENAME) &&
+ (!mdr->has_more() || mdr->more()->witnessed.empty())) // haven't started slave request
+ ) {
+
+ dout(20) << __func__ << ": full, responding ENOSPC to op " << ceph_mds_op_name(req->get_op()) << dendl;
+ respond_to_request(mdr, -ENOSPC);
+ return;
+ } else {
+ dout(20) << __func__ << ": full, permitting op " << ceph_mds_op_name(req->get_op()) << dendl;
+ }
+ }
+
+ switch (req->get_op()) {
+ case CEPH_MDS_OP_LOOKUPHASH:
+ case CEPH_MDS_OP_LOOKUPINO:
+ handle_client_lookup_ino(mdr, false, false);
+ break;
+ case CEPH_MDS_OP_LOOKUPPARENT:
+ handle_client_lookup_ino(mdr, true, false);
+ break;
+ case CEPH_MDS_OP_LOOKUPNAME:
+ handle_client_lookup_ino(mdr, false, true);
+ break;
+
+ // inodes ops.
+ case CEPH_MDS_OP_LOOKUP:
+ handle_client_getattr(mdr, true);
+ break;
+
+ case CEPH_MDS_OP_LOOKUPSNAP:
+ // lookupsnap does not reference a CDentry; treat it as a getattr
+ case CEPH_MDS_OP_GETATTR:
+ handle_client_getattr(mdr, false);
+ break;
+
+ case CEPH_MDS_OP_SETATTR:
+ handle_client_setattr(mdr);
+ break;
+ case CEPH_MDS_OP_SETLAYOUT:
+ handle_client_setlayout(mdr);
+ break;
+ case CEPH_MDS_OP_SETDIRLAYOUT:
+ handle_client_setdirlayout(mdr);
+ break;
+ case CEPH_MDS_OP_SETXATTR:
+ handle_client_setxattr(mdr);
+ break;
+ case CEPH_MDS_OP_RMXATTR:
+ handle_client_removexattr(mdr);
+ break;
+
+ case CEPH_MDS_OP_READDIR:
+ handle_client_readdir(mdr);
+ break;
+
+ case CEPH_MDS_OP_SETFILELOCK:
+ handle_client_file_setlock(mdr);
+ break;
+
+ case CEPH_MDS_OP_GETFILELOCK:
+ handle_client_file_readlock(mdr);
+ break;
+
+ // funky.
+ case CEPH_MDS_OP_CREATE:
+ if (mdr->has_completed)
+ handle_client_open(mdr); // already created.. just open
+ else
+ handle_client_openc(mdr);
+ break;
+
+ case CEPH_MDS_OP_OPEN:
+ handle_client_open(mdr);
+ break;
+
+ // namespace.
+ // no prior locks.
+ case CEPH_MDS_OP_MKNOD:
+ handle_client_mknod(mdr);
+ break;
+ case CEPH_MDS_OP_LINK:
+ handle_client_link(mdr);
+ break;
+ case CEPH_MDS_OP_UNLINK:
+ case CEPH_MDS_OP_RMDIR:
+ handle_client_unlink(mdr);
+ break;
+ case CEPH_MDS_OP_RENAME:
+ handle_client_rename(mdr);
+ break;
+ case CEPH_MDS_OP_MKDIR:
+ handle_client_mkdir(mdr);
+ break;
+ case CEPH_MDS_OP_SYMLINK:
+ handle_client_symlink(mdr);
+ break;
+
+
+ // snaps
+ case CEPH_MDS_OP_LSSNAP:
+ handle_client_lssnap(mdr);
+ break;
+ case CEPH_MDS_OP_MKSNAP:
+ handle_client_mksnap(mdr);
+ break;
+ case CEPH_MDS_OP_RMSNAP:
+ handle_client_rmsnap(mdr);
+ break;
+ case CEPH_MDS_OP_RENAMESNAP:
+ handle_client_renamesnap(mdr);
+ break;
+
+ default:
+ dout(1) << " unknown client op " << req->get_op() << dendl;
+ respond_to_request(mdr, -EOPNOTSUPP);
+ }
+}
+
+
+// ---------------------------------------
+// SLAVE REQUESTS
+
+/* This function DOES put the passed message before returning*/
+void Server::handle_slave_request(MMDSSlaveRequest *m)
+{
+ dout(4) << "handle_slave_request " << m->get_reqid() << " from " << m->get_source() << dendl;
+ mds_rank_t from = mds_rank_t(m->get_source().num());
+
+ if (logger) logger->inc(l_mdss_handle_slave_request);
+
+ // reply?
+ if (m->is_reply())
+ return handle_slave_request_reply(m);
+
+ // the purpose of rename notify is enforcing causal message ordering. making sure
+ // bystanders have received all messages from rename srcdn's auth MDS.
+ if (m->get_op() == MMDSSlaveRequest::OP_RENAMENOTIFY) {
+ MMDSSlaveRequest *reply = new MMDSSlaveRequest(m->get_reqid(), m->get_attempt(),
+ MMDSSlaveRequest::OP_RENAMENOTIFYACK);
+ mds->send_message(reply, m->get_connection());
+ m->put();
+ return;
+ }
+
+ CDentry *straydn = NULL;
+ if (m->stray.length() > 0) {
+ straydn = mdcache->add_replica_stray(m->stray, from);
+ assert(straydn);
+ m->stray.clear();
+ }
+
+ // am i a new slave?
+ MDRequestRef mdr;
+ if (mdcache->have_request(m->get_reqid())) {
+ // existing?
+ mdr = mdcache->request_get(m->get_reqid());
+
+ // is my request newer?
+ if (mdr->attempt > m->get_attempt()) {
+ dout(10) << "local request " << *mdr << " attempt " << mdr->attempt << " > " << m->get_attempt()
+ << ", dropping " << *m << dendl;
+ m->put();
+ return;
+ }
+
+
+ if (mdr->attempt < m->get_attempt()) {
+ // mine is old, close it out
+ dout(10) << "local request " << *mdr << " attempt " << mdr->attempt << " < " << m->get_attempt()
+ << ", closing out" << dendl;
+ mdcache->request_finish(mdr);
+ mdr.reset();
+ } else if (mdr->slave_to_mds != from) {
+ dout(10) << "local request " << *mdr << " not slave to mds." << from << dendl;
+ m->put();
+ return;
+ }
+
+ if (m->get_op() == MMDSSlaveRequest::OP_FINISH && m->is_abort()) {
+ mdr->aborted = true;
+ if (mdr->slave_request) {
+ // only abort on-going xlock, wrlock and auth pin
+ assert(!mdr->slave_did_prepare());
+ } else {
+ mdcache->request_finish(mdr);
+ }
+ return;
+ }
+ }
+ if (!mdr.get()) {
+ // new?
+ if (m->get_op() == MMDSSlaveRequest::OP_FINISH) {
+ dout(10) << "missing slave request for " << m->get_reqid()
+ << " OP_FINISH, must have lost race with a forward" << dendl;
+ m->put();
+ return;
+ }
+ mdr = mdcache->request_start_slave(m->get_reqid(), m->get_attempt(), m);
+ mdr->set_op_stamp(m->op_stamp);
+ }
+ assert(mdr->slave_request == 0); // only one at a time, please!
+
+ if (straydn) {
+ mdr->pin(straydn);
+ mdr->straydn = straydn;
+ }
+
+ if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) {
+ dout(3) << "not clientreplay|active yet, waiting" << dendl;
+ mds->wait_for_replay(new C_MDS_RetryMessage(mds, m));
+ return;
+ } else if (mds->is_clientreplay() && !mds->mdsmap->is_clientreplay(from) &&
+ mdr->locks.empty()) {
+ dout(3) << "not active yet, waiting" << dendl;
+ mds->wait_for_active(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+
+ mdr->slave_request = m;
+
+ dispatch_slave_request(mdr);
+}
+
+/* This function DOES put the passed message before returning*/
+void Server::handle_slave_request_reply(MMDSSlaveRequest *m)
+{
+ mds_rank_t from = mds_rank_t(m->get_source().num());
+
+ if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) {
+ metareqid_t r = m->get_reqid();
+ if (!mdcache->have_uncommitted_master(r, from)) {
+ dout(10) << "handle_slave_request_reply ignoring slave reply from mds."
+ << from << " reqid " << r << dendl;
+ m->put();
+ return;
+ }
+ dout(3) << "not clientreplay|active yet, waiting" << dendl;
+ mds->wait_for_replay(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+
+ if (m->get_op() == MMDSSlaveRequest::OP_COMMITTED) {
+ metareqid_t r = m->get_reqid();
+ mdcache->committed_master_slave(r, from);
+ m->put();
+ return;
+ }
+
+ MDRequestRef mdr = mdcache->request_get(m->get_reqid());
+ if (m->get_attempt() != mdr->attempt) {
+ dout(10) << "handle_slave_request_reply " << *mdr << " ignoring reply from other attempt "
+ << m->get_attempt() << dendl;
+ m->put();
+ return;
+ }
+
+ switch (m->get_op()) {
+ case MMDSSlaveRequest::OP_XLOCKACK:
+ {
+ // identify lock, master request
+ SimpleLock *lock = mds->locker->get_lock(m->get_lock_type(),
+ m->get_object_info());
+ mdr->more()->slaves.insert(from);
+ dout(10) << "got remote xlock on " << *lock << " on " << *lock->get_parent() << dendl;
+ mdr->xlocks.insert(lock);
+ mdr->locks.insert(lock);
+ mdr->finish_locking(lock);
+ lock->get_xlock(mdr, mdr->get_client());
+
+ assert(mdr->more()->waiting_on_slave.count(from));
+ mdr->more()->waiting_on_slave.erase(from);
+ assert(mdr->more()->waiting_on_slave.empty());
+ mdcache->dispatch_request(mdr);
+ }
+ break;
+
+ case MMDSSlaveRequest::OP_WRLOCKACK:
+ {
+ // identify lock, master request
+ SimpleLock *lock = mds->locker->get_lock(m->get_lock_type(),
+ m->get_object_info());
+ mdr->more()->slaves.insert(from);
+ dout(10) << "got remote wrlock on " << *lock << " on " << *lock->get_parent() << dendl;
+ mdr->remote_wrlocks[lock] = from;
+ mdr->locks.insert(lock);
+ mdr->finish_locking(lock);
+
+ assert(mdr->more()->waiting_on_slave.count(from));
+ mdr->more()->waiting_on_slave.erase(from);
+ assert(mdr->more()->waiting_on_slave.empty());
+ mdcache->dispatch_request(mdr);
+ }
+ break;
+
+ case MMDSSlaveRequest::OP_AUTHPINACK:
+ handle_slave_auth_pin_ack(mdr, m);
+ break;
+
+ case MMDSSlaveRequest::OP_LINKPREPACK:
+ handle_slave_link_prep_ack(mdr, m);
+ break;
+
+ case MMDSSlaveRequest::OP_RMDIRPREPACK:
+ handle_slave_rmdir_prep_ack(mdr, m);
+ break;
+
+ case MMDSSlaveRequest::OP_RENAMEPREPACK:
+ handle_slave_rename_prep_ack(mdr, m);
+ break;
+
+ case MMDSSlaveRequest::OP_RENAMENOTIFYACK:
+ handle_slave_rename_notify_ack(mdr, m);
+ break;
+
+ default:
+ ceph_abort();
+ }
+
+ // done with reply.
+ m->put();
+}
+
+/* This function DOES put the mdr->slave_request before returning*/
+void Server::dispatch_slave_request(MDRequestRef& mdr)
+{
+ dout(7) << "dispatch_slave_request " << *mdr << " " << *mdr->slave_request << dendl;
+
+ if (mdr->aborted) {
+ dout(7) << " abort flag set, finishing" << dendl;
+ mdcache->request_finish(mdr);
+ return;
+ }
+
+ if (logger) logger->inc(l_mdss_dispatch_slave_request);
+
+ int op = mdr->slave_request->get_op();
+ switch (op) {
+ case MMDSSlaveRequest::OP_XLOCK:
+ case MMDSSlaveRequest::OP_WRLOCK:
+ {
+ // identify object
+ SimpleLock *lock = mds->locker->get_lock(mdr->slave_request->get_lock_type(),
+ mdr->slave_request->get_object_info());
+
+ if (!lock) {
+ dout(10) << "don't have object, dropping" << dendl;
+ ceph_abort(); // can this happen, if we auth pinned properly.
+ }
+ if (op == MMDSSlaveRequest::OP_XLOCK && !lock->get_parent()->is_auth()) {
+ dout(10) << "not auth for remote xlock attempt, dropping on "
+ << *lock << " on " << *lock->get_parent() << dendl;
+ } else {
+ // use acquire_locks so that we get auth_pinning.
+ set<SimpleLock*> rdlocks;
+ set<SimpleLock*> wrlocks = mdr->wrlocks;
+ set<SimpleLock*> xlocks = mdr->xlocks;
+
+ int replycode = 0;
+ switch (op) {
+ case MMDSSlaveRequest::OP_XLOCK:
+ xlocks.insert(lock);
+ replycode = MMDSSlaveRequest::OP_XLOCKACK;
+ break;
+ case MMDSSlaveRequest::OP_WRLOCK:
+ wrlocks.insert(lock);
+ replycode = MMDSSlaveRequest::OP_WRLOCKACK;
+ break;
+ }
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ // ack
+ MMDSSlaveRequest *r = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, replycode);
+ r->set_lock_type(lock->get_type());
+ lock->get_parent()->set_object_info(r->get_object_info());
+ mds->send_message(r, mdr->slave_request->get_connection());
+ }
+
+ // done.
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ }
+ break;
+
+ case MMDSSlaveRequest::OP_UNXLOCK:
+ case MMDSSlaveRequest::OP_UNWRLOCK:
+ {
+ SimpleLock *lock = mds->locker->get_lock(mdr->slave_request->get_lock_type(),
+ mdr->slave_request->get_object_info());
+ assert(lock);
+ bool need_issue = false;
+ switch (op) {
+ case MMDSSlaveRequest::OP_UNXLOCK:
+ mds->locker->xlock_finish(lock, mdr.get(), &need_issue);
+ break;
+ case MMDSSlaveRequest::OP_UNWRLOCK:
+ mds->locker->wrlock_finish(lock, mdr.get(), &need_issue);
+ break;
+ }
+ if (need_issue)
+ mds->locker->issue_caps(static_cast<CInode*>(lock->get_parent()));
+
+ // done. no ack necessary.
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ }
+ break;
+
+ case MMDSSlaveRequest::OP_DROPLOCKS:
+ mds->locker->drop_locks(mdr.get());
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ break;
+
+ case MMDSSlaveRequest::OP_AUTHPIN:
+ handle_slave_auth_pin(mdr);
+ break;
+
+ case MMDSSlaveRequest::OP_LINKPREP:
+ case MMDSSlaveRequest::OP_UNLINKPREP:
+ handle_slave_link_prep(mdr);
+ break;
+
+ case MMDSSlaveRequest::OP_RMDIRPREP:
+ handle_slave_rmdir_prep(mdr);
+ break;
+
+ case MMDSSlaveRequest::OP_RENAMEPREP:
+ handle_slave_rename_prep(mdr);
+ break;
+
+ case MMDSSlaveRequest::OP_FINISH:
+ // information about rename imported caps
+ if (mdr->slave_request->inode_export.length() > 0)
+ mdr->more()->inode_import.claim(mdr->slave_request->inode_export);
+ // finish off request.
+ mdcache->request_finish(mdr);
+ break;
+
+ default:
+ ceph_abort();
+ }
+}
+
+/* This function DOES put the mdr->slave_request before returning*/
+void Server::handle_slave_auth_pin(MDRequestRef& mdr)
+{
+ dout(10) << "handle_slave_auth_pin " << *mdr << dendl;
+
+ // build list of objects
+ list<MDSCacheObject*> objects;
+ CInode *auth_pin_freeze = NULL;
+ bool fail = false, wouldblock = false, readonly = false;
+
+ if (mdcache->is_readonly()) {
+ dout(10) << " read-only FS" << dendl;
+ readonly = true;
+ fail = true;
+ }
+
+ if (!fail) {
+ for (vector<MDSCacheObjectInfo>::iterator p = mdr->slave_request->get_authpins().begin();
+ p != mdr->slave_request->get_authpins().end();
+ ++p) {
+ MDSCacheObject *object = mdcache->get_object(*p);
+ if (!object) {
+ dout(10) << " don't have " << *p << dendl;
+ fail = true;
+ break;
+ }
+
+ objects.push_back(object);
+ if (*p == mdr->slave_request->get_authpin_freeze())
+ auth_pin_freeze = static_cast<CInode*>(object);
+ }
+ }
+
+ // can we auth pin them?
+ if (!fail) {
+ for (list<MDSCacheObject*>::iterator p = objects.begin();
+ p != objects.end();
+ ++p) {
+ if (!(*p)->is_auth()) {
+ dout(10) << " not auth for " << **p << dendl;
+ fail = true;
+ break;
+ }
+ if (mdr->is_auth_pinned(*p))
+ continue;
+ if (!mdr->can_auth_pin(*p)) {
+ if (mdr->slave_request->is_nonblock()) {
+ dout(10) << " can't auth_pin (freezing?) " << **p << " nonblocking" << dendl;
+ fail = true;
+ wouldblock = true;
+ break;
+ }
+ // wait
+ dout(10) << " waiting for authpinnable on " << **p << dendl;
+ (*p)->add_waiter(CDir::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr));
+ mdr->drop_local_auth_pins();
+
+ mds->locker->notify_freeze_waiter(*p);
+ return;
+ }
+ }
+ }
+
+ // auth pin!
+ if (fail) {
+ mdr->drop_local_auth_pins(); // just in case
+ } else {
+ /* freeze authpin wrong inode */
+ if (mdr->has_more() && mdr->more()->is_freeze_authpin &&
+ mdr->more()->rename_inode != auth_pin_freeze)
+ mdr->unfreeze_auth_pin(true);
+
+ /* handle_slave_rename_prep() call freeze_inode() to wait for all other operations
+ * on the source inode to complete. This happens after all locks for the rename
+ * operation are acquired. But to acquire locks, we need auth pin locks' parent
+ * objects first. So there is an ABBA deadlock if someone auth pins the source inode
+ * after locks are acquired and before Server::handle_slave_rename_prep() is called.
+ * The solution is freeze the inode and prevent other MDRequests from getting new
+ * auth pins.
+ */
+ if (auth_pin_freeze) {
+ dout(10) << " freezing auth pin on " << *auth_pin_freeze << dendl;
+ if (!mdr->freeze_auth_pin(auth_pin_freeze)) {
+ auth_pin_freeze->add_waiter(CInode::WAIT_FROZEN, new C_MDS_RetryRequest(mdcache, mdr));
+ mds->mdlog->flush();
+ return;
+ }
+ }
+ for (list<MDSCacheObject*>::iterator p = objects.begin();
+ p != objects.end();
+ ++p) {
+ dout(10) << "auth_pinning " << **p << dendl;
+ mdr->auth_pin(*p);
+ }
+ }
+
+ // ack!
+ MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, MMDSSlaveRequest::OP_AUTHPINACK);
+
+ // return list of my auth_pins (if any)
+ for (set<MDSCacheObject*>::iterator p = mdr->auth_pins.begin();
+ p != mdr->auth_pins.end();
+ ++p) {
+ MDSCacheObjectInfo info;
+ (*p)->set_object_info(info);
+ reply->get_authpins().push_back(info);
+ if (*p == (MDSCacheObject*)auth_pin_freeze)
+ auth_pin_freeze->set_object_info(reply->get_authpin_freeze());
+ }
+
+ if (wouldblock)
+ reply->mark_error_wouldblock();
+ if (readonly)
+ reply->mark_error_rofs();
+
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+
+ // clean up this request
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ return;
+}
+
+/* This function DOES NOT put the passed ack before returning*/
+void Server::handle_slave_auth_pin_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack)
+{
+ dout(10) << "handle_slave_auth_pin_ack on " << *mdr << " " << *ack << dendl;
+ mds_rank_t from = mds_rank_t(ack->get_source().num());
+
+ // added auth pins?
+ set<MDSCacheObject*> pinned;
+ for (vector<MDSCacheObjectInfo>::iterator p = ack->get_authpins().begin();
+ p != ack->get_authpins().end();
+ ++p) {
+ MDSCacheObject *object = mdcache->get_object(*p);
+ assert(object); // we pinned it
+ dout(10) << " remote has pinned " << *object << dendl;
+ if (!mdr->is_auth_pinned(object))
+ mdr->remote_auth_pins[object] = from;
+ if (*p == ack->get_authpin_freeze())
+ mdr->set_remote_frozen_auth_pin(static_cast<CInode *>(object));
+ pinned.insert(object);
+ }
+
+ // removed frozen auth pin ?
+ if (mdr->more()->is_remote_frozen_authpin &&
+ ack->get_authpin_freeze() == MDSCacheObjectInfo()) {
+ auto p = mdr->remote_auth_pins.find(mdr->more()->rename_inode);
+ assert(p != mdr->remote_auth_pins.end());
+ if (p->second == from) {
+ mdr->more()->is_remote_frozen_authpin = false;
+ }
+ }
+
+ // removed auth pins?
+ map<MDSCacheObject*, mds_rank_t>::iterator p = mdr->remote_auth_pins.begin();
+ while (p != mdr->remote_auth_pins.end()) {
+ MDSCacheObject* object = p->first;
+ if (p->second == from && pinned.count(object) == 0) {
+ dout(10) << " remote has unpinned " << *object << dendl;
+ mdr->remote_auth_pins.erase(p++);
+ } else {
+ ++p;
+ }
+ }
+
+ if (ack->is_error_rofs()) {
+ mdr->more()->slave_error = -EROFS;
+ mdr->aborted = true;
+ } else if (ack->is_error_wouldblock()) {
+ mdr->more()->slave_error = -EWOULDBLOCK;
+ mdr->aborted = true;
+ }
+
+ // note slave
+ mdr->more()->slaves.insert(from);
+
+ // clear from waiting list
+ assert(mdr->more()->waiting_on_slave.count(from));
+ mdr->more()->waiting_on_slave.erase(from);
+
+ // go again?
+ if (mdr->more()->waiting_on_slave.empty())
+ mdcache->dispatch_request(mdr);
+ else
+ dout(10) << "still waiting on slaves " << mdr->more()->waiting_on_slave << dendl;
+}
+
+
+// ---------------------------------------
+// HELPERS
+
+
+/**
+ * check whether we are permitted to complete a request
+ *
+ * Check whether we have permission to perform the operation specified
+ * by mask on the given inode, based on the capability in the mdr's
+ * session.
+ */
+bool Server::check_access(MDRequestRef& mdr, CInode *in, unsigned mask)
+{
+ if (mdr->session) {
+ int r = mdr->session->check_access(
+ in, mask,
+ mdr->client_request->get_caller_uid(),
+ mdr->client_request->get_caller_gid(),
+ &mdr->client_request->get_caller_gid_list(),
+ mdr->client_request->head.args.setattr.uid,
+ mdr->client_request->head.args.setattr.gid);
+ if (r < 0) {
+ respond_to_request(mdr, r);
+ return false;
+ }
+ }
+ return true;
+}
+
+/**
+ * check whether fragment has reached maximum size
+ *
+ */
+bool Server::check_fragment_space(MDRequestRef &mdr, CDir *in)
+{
+ const auto size = in->get_frag_size();
+ if (size >= g_conf->mds_bal_fragment_size_max) {
+ dout(10) << "fragment " << *in << " size exceeds " << g_conf->mds_bal_fragment_size_max << " (ENOSPC)" << dendl;
+ respond_to_request(mdr, -ENOSPC);
+ return false;
+ }
+
+ return true;
+}
+
+
+/** validate_dentry_dir
+ *
+ * verify that the dir exists and would own the dname.
+ * do not check if the dentry exists.
+ */
+CDir *Server::validate_dentry_dir(MDRequestRef& mdr, CInode *diri, const string& dname)
+{
+ // make sure parent is a dir?
+ if (!diri->is_dir()) {
+ dout(7) << "validate_dentry_dir: not a dir" << dendl;
+ respond_to_request(mdr, -ENOTDIR);
+ return NULL;
+ }
+
+ // which dirfrag?
+ frag_t fg = diri->pick_dirfrag(dname);
+ CDir *dir = try_open_auth_dirfrag(diri, fg, mdr);
+ if (!dir)
+ return 0;
+
+ // frozen?
+ if (dir->is_frozen()) {
+ dout(7) << "dir is frozen " << *dir << dendl;
+ dir->add_waiter(CDir::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr));
+ return NULL;
+ }
+
+ return dir;
+}
+
+
+/** prepare_null_dentry
+ * prepare a null (or existing) dentry in given dir.
+ * wait for any dn lock.
+ */
+CDentry* Server::prepare_null_dentry(MDRequestRef& mdr, CDir *dir, const string& dname, bool okexist)
+{
+ dout(10) << "prepare_null_dentry " << dname << " in " << *dir << dendl;
+ assert(dir->is_auth());
+
+ client_t client = mdr->get_client();
+
+ // does it already exist?
+ CDentry *dn = dir->lookup(dname);
+ if (dn) {
+ /*
+ if (dn->lock.is_xlocked_by_other(mdr)) {
+ dout(10) << "waiting on xlocked dentry " << *dn << dendl;
+ dn->lock.add_waiter(SimpleLock::WAIT_RD, new C_MDS_RetryRequest(mdcache, mdr));
+ return 0;
+ }
+ */
+ if (!dn->get_linkage(client, mdr)->is_null()) {
+ // name already exists
+ dout(10) << "dentry " << dname << " exists in " << *dir << dendl;
+ if (!okexist) {
+ respond_to_request(mdr, -EEXIST);
+ return 0;
+ }
+ } else {
+ dn->first = dir->inode->find_snaprealm()->get_newest_seq() + 1;
+ }
+
+ return dn;
+ }
+
+ // make sure dir is complete
+ if (!dir->is_complete() && (!dir->has_bloom() || dir->is_in_bloom(dname))) {
+ dout(7) << " incomplete dir contents for " << *dir << ", fetching" << dendl;
+ dir->fetch(new C_MDS_RetryRequest(mdcache, mdr));
+ return 0;
+ }
+
+ // create
+ dn = dir->add_null_dentry(dname, dir->inode->find_snaprealm()->get_newest_seq() + 1);
+ dn->mark_new();
+ dout(10) << "prepare_null_dentry added " << *dn << dendl;
+ return dn;
+}
+
+CDentry* Server::prepare_stray_dentry(MDRequestRef& mdr, CInode *in)
+{
+ CDentry *straydn = mdr->straydn;
+ if (straydn) {
+ string straydname;
+ in->name_stray_dentry(straydname);
+ if (straydn->get_name() == straydname)
+ return straydn;
+
+ assert(!mdr->done_locking);
+ mdr->unpin(straydn);
+ }
+
+ CDir *straydir = mdcache->get_stray_dir(in);
+
+ if (!mdr->client_request->is_replay() &&
+ !check_fragment_space(mdr, straydir))
+ return NULL;
+
+ straydn = mdcache->get_or_create_stray_dentry(in);
+ mdr->straydn = straydn;
+ mdr->pin(straydn);
+ return straydn;
+}
+
+/** prepare_new_inode
+ *
+ * create a new inode. set c/m/atime. hit dir pop.
+ */
+CInode* Server::prepare_new_inode(MDRequestRef& mdr, CDir *dir, inodeno_t useino, unsigned mode,
+ file_layout_t *layout)
+{
+ CInode *in = new CInode(mdcache);
+
+ // Server::prepare_force_open_sessions() can re-open session in closing
+ // state. In that corner case, session's prealloc_inos are being freed.
+ // To simplify the code, we disallow using/refilling session's prealloc_ino
+ // while session is opening.
+ bool allow_prealloc_inos = !mdr->session->is_opening();
+
+ // assign ino
+ if (allow_prealloc_inos &&
+ mdr->session->info.prealloc_inos.size()) {
+ mdr->used_prealloc_ino =
+ in->inode.ino = mdr->session->take_ino(useino); // prealloc -> used
+ mds->sessionmap.mark_projected(mdr->session);
+
+ dout(10) << "prepare_new_inode used_prealloc " << mdr->used_prealloc_ino
+ << " (" << mdr->session->info.prealloc_inos
+ << ", " << mdr->session->info.prealloc_inos.size() << " left)"
+ << dendl;
+ } else {
+ mdr->alloc_ino =
+ in->inode.ino = mds->inotable->project_alloc_id();
+ dout(10) << "prepare_new_inode alloc " << mdr->alloc_ino << dendl;
+ }
+
+ if (useino && useino != in->inode.ino) {
+ dout(0) << "WARNING: client specified " << useino << " and i allocated " << in->inode.ino << dendl;
+ mds->clog->error() << mdr->client_request->get_source()
+ << " specified ino " << useino
+ << " but mds." << mds->get_nodeid() << " allocated " << in->inode.ino;
+ //ceph_abort(); // just for now.
+ }
+
+ if (allow_prealloc_inos &&
+ mdr->session->get_num_projected_prealloc_inos() < g_conf->mds_client_prealloc_inos / 2) {
+ int need = g_conf->mds_client_prealloc_inos - mdr->session->get_num_projected_prealloc_inos();
+ mds->inotable->project_alloc_ids(mdr->prealloc_inos, need);
+ assert(mdr->prealloc_inos.size()); // or else fix projected increment semantics
+ mdr->session->pending_prealloc_inos.insert(mdr->prealloc_inos);
+ mds->sessionmap.mark_projected(mdr->session);
+ dout(10) << "prepare_new_inode prealloc " << mdr->prealloc_inos << dendl;
+ }
+
+ in->inode.version = 1;
+ in->inode.xattr_version = 1;
+ in->inode.nlink = 1; // FIXME
+
+ in->inode.mode = mode;
+
+ memset(&in->inode.dir_layout, 0, sizeof(in->inode.dir_layout));
+ if (in->inode.is_dir()) {
+ in->inode.dir_layout.dl_dir_hash = g_conf->mds_default_dir_hash;
+ } else if (layout) {
+ in->inode.layout = *layout;
+ } else {
+ in->inode.layout = mdcache->default_file_layout;
+ }
+
+ in->inode.truncate_size = -1ull; // not truncated, yet!
+ in->inode.truncate_seq = 1; /* starting with 1, 0 is kept for no-truncation logic */
+
+ CInode *diri = dir->get_inode();
+
+ dout(10) << oct << " dir mode 0" << diri->inode.mode << " new mode 0" << mode << dec << dendl;
+
+ if (diri->inode.mode & S_ISGID) {
+ dout(10) << " dir is sticky" << dendl;
+ in->inode.gid = diri->inode.gid;
+ if (S_ISDIR(mode)) {
+ dout(10) << " new dir also sticky" << dendl;
+ in->inode.mode |= S_ISGID;
+ }
+ } else
+ in->inode.gid = mdr->client_request->get_caller_gid();
+
+ in->inode.uid = mdr->client_request->get_caller_uid();
+
+ in->inode.btime = in->inode.ctime = in->inode.mtime = in->inode.atime =
+ mdr->get_op_stamp();
+
+ in->inode.change_attr = 0;
+
+ MClientRequest *req = mdr->client_request;
+ if (req->get_data().length()) {
+ bufferlist::iterator p = req->get_data().begin();
+
+ // xattrs on new inode?
+ map<string,bufferptr> xattrs;
+ ::decode(xattrs, p);
+ for (map<string,bufferptr>::iterator p = xattrs.begin(); p != xattrs.end(); ++p) {
+ dout(10) << "prepare_new_inode setting xattr " << p->first << dendl;
+ in->xattrs[p->first] = p->second;
+ }
+ }
+
+ if (!mds->mdsmap->get_inline_data_enabled() ||
+ !mdr->session->connection->has_feature(CEPH_FEATURE_MDS_INLINE_DATA))
+ in->inode.inline_data.version = CEPH_INLINE_NONE;
+
+ mdcache->add_inode(in); // add
+ dout(10) << "prepare_new_inode " << *in << dendl;
+ return in;
+}
+
+void Server::journal_allocated_inos(MDRequestRef& mdr, EMetaBlob *blob)
+{
+ dout(20) << "journal_allocated_inos sessionmapv " << mds->sessionmap.get_projected()
+ << " inotablev " << mds->inotable->get_projected_version()
+ << dendl;
+ blob->set_ino_alloc(mdr->alloc_ino,
+ mdr->used_prealloc_ino,
+ mdr->prealloc_inos,
+ mdr->client_request->get_source(),
+ mds->sessionmap.get_projected(),
+ mds->inotable->get_projected_version());
+}
+
+void Server::apply_allocated_inos(MDRequestRef& mdr, Session *session)
+{
+ dout(10) << "apply_allocated_inos " << mdr->alloc_ino
+ << " / " << mdr->prealloc_inos
+ << " / " << mdr->used_prealloc_ino << dendl;
+
+ if (mdr->alloc_ino) {
+ mds->inotable->apply_alloc_id(mdr->alloc_ino);
+ }
+ if (mdr->prealloc_inos.size()) {
+ assert(session);
+ session->pending_prealloc_inos.subtract(mdr->prealloc_inos);
+ session->info.prealloc_inos.insert(mdr->prealloc_inos);
+ mds->sessionmap.mark_dirty(session);
+ mds->inotable->apply_alloc_ids(mdr->prealloc_inos);
+ }
+ if (mdr->used_prealloc_ino) {
+ assert(session);
+ session->info.used_inos.erase(mdr->used_prealloc_ino);
+ mds->sessionmap.mark_dirty(session);
+ }
+}
+
+class C_MDS_TryFindInode : public ServerContext {
+ MDRequestRef mdr;
+public:
+ C_MDS_TryFindInode(Server *s, MDRequestRef& r) : ServerContext(s), mdr(r) {}
+ void finish(int r) override {
+ if (r == -ESTALE) // :( find_ino_peers failed
+ server->respond_to_request(mdr, r);
+ else
+ server->dispatch_client_request(mdr);
+ }
+};
+
+CDir *Server::traverse_to_auth_dir(MDRequestRef& mdr, vector<CDentry*> &trace, filepath refpath)
+{
+ // figure parent dir vs dname
+ if (refpath.depth() == 0) {
+ dout(7) << "can't do that to root" << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return 0;
+ }
+ string dname = refpath.last_dentry();
+ refpath.pop_dentry();
+
+ dout(10) << "traverse_to_auth_dir dirpath " << refpath << " dname " << dname << dendl;
+
+ // traverse to parent dir
+ CInode *diri;
+ int r = mdcache->path_traverse(mdr, NULL, NULL, refpath, &trace, &diri, MDS_TRAVERSE_FORWARD);
+ if (r > 0) return 0; // delayed
+ if (r < 0) {
+ if (r == -ESTALE) {
+ dout(10) << "FAIL on ESTALE but attempting recovery" << dendl;
+ mdcache->find_ino_peers(refpath.get_ino(), new C_MDS_TryFindInode(this, mdr));
+ return 0;
+ }
+ respond_to_request(mdr, r);
+ return 0;
+ }
+
+ // is it an auth dir?
+ CDir *dir = validate_dentry_dir(mdr, diri, dname);
+ if (!dir)
+ return 0; // forwarded or waiting for freeze
+
+ dout(10) << "traverse_to_auth_dir " << *dir << dendl;
+ return dir;
+}
+
+/* If this returns null, the request has been handled
+ * as appropriate: forwarded on, or the client's been replied to */
+CInode* Server::rdlock_path_pin_ref(MDRequestRef& mdr, int n,
+ set<SimpleLock*> &rdlocks,
+ bool want_auth,
+ bool no_want_auth, /* for readdir, who doesn't want auth _even_if_ it's
+ a snapped dir */
+ file_layout_t **layout,
+ bool no_lookup) // true if we cannot return a null dentry lease
+{
+ const filepath& refpath = n ? mdr->get_filepath2() : mdr->get_filepath();
+ dout(10) << "rdlock_path_pin_ref " << *mdr << " " << refpath << dendl;
+
+ if (mdr->done_locking)
+ return mdr->in[n];
+
+ // traverse
+ int r = mdcache->path_traverse(mdr, NULL, NULL, refpath, &mdr->dn[n], &mdr->in[n], MDS_TRAVERSE_FORWARD);
+ if (r > 0)
+ return NULL; // delayed
+ if (r < 0) { // error
+ if (r == -ENOENT && n == 0 && mdr->dn[n].size()) {
+ if (!no_lookup)
+ mdr->tracedn = mdr->dn[n][mdr->dn[n].size()-1];
+ respond_to_request(mdr, r);
+ } else if (r == -ESTALE) {
+ dout(10) << "FAIL on ESTALE but attempting recovery" << dendl;
+ MDSInternalContextBase *c = new C_MDS_TryFindInode(this, mdr);
+ mdcache->find_ino_peers(refpath.get_ino(), c);
+ } else {
+ dout(10) << "FAIL on error " << r << dendl;
+ respond_to_request(mdr, r);
+ }
+ return 0;
+ }
+ CInode *ref = mdr->in[n];
+ dout(10) << "ref is " << *ref << dendl;
+
+ // fw to inode auth?
+ if (mdr->snapid != CEPH_NOSNAP && !no_want_auth)
+ want_auth = true;
+
+ if (want_auth) {
+ if (ref->is_ambiguous_auth()) {
+ dout(10) << "waiting for single auth on " << *ref << dendl;
+ ref->add_waiter(CInode::WAIT_SINGLEAUTH, new C_MDS_RetryRequest(mdcache, mdr));
+ return 0;
+ }
+ if (!ref->is_auth()) {
+ dout(10) << "fw to auth for " << *ref << dendl;
+ mdcache->request_forward(mdr, ref->authority().first);
+ return 0;
+ }
+
+ // auth_pin?
+ // do NOT proceed if freezing, as cap release may defer in that case, and
+ // we could deadlock when we try to lock @ref.
+ // if we're already auth_pinned, continue; the release has already been processed.
+ if (ref->is_frozen() || ref->is_frozen_auth_pin() ||
+ (ref->is_freezing() && !mdr->is_auth_pinned(ref))) {
+ dout(7) << "waiting for !frozen/authpinnable on " << *ref << dendl;
+ ref->add_waiter(CInode::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr));
+ /* If we have any auth pins, this will deadlock.
+ * But the only way to get here if we've already got auth pins
+ * is because we're on an inode with snapshots that got updated
+ * between dispatches of this request. So we're going to drop
+ * our locks and our auth pins and reacquire them later.
+ *
+ * This is safe since we're only in this function when working on
+ * a single MDS request; otherwise we'd be in
+ * rdlock_path_xlock_dentry.
+ */
+ mds->locker->drop_locks(mdr.get(), NULL);
+ mdr->drop_local_auth_pins();
+ if (!mdr->remote_auth_pins.empty())
+ mds->locker->notify_freeze_waiter(ref);
+ return 0;
+ }
+
+ mdr->auth_pin(ref);
+ }
+
+ for (int i=0; i<(int)mdr->dn[n].size(); i++)
+ rdlocks.insert(&mdr->dn[n][i]->lock);
+ if (layout)
+ mds->locker->include_snap_rdlocks_wlayout(rdlocks, ref, layout);
+ else
+ mds->locker->include_snap_rdlocks(rdlocks, ref);
+
+ // set and pin ref
+ mdr->pin(ref);
+ return ref;
+}
+
+
+/** rdlock_path_xlock_dentry
+ * traverse path to the directory that could/would contain dentry.
+ * make sure i am auth for that dentry, forward as necessary.
+ * create null dentry in place (or use existing if okexist).
+ * get rdlocks on traversed dentries, xlock on new dentry.
+ */
+CDentry* Server::rdlock_path_xlock_dentry(MDRequestRef& mdr, int n,
+ set<SimpleLock*>& rdlocks, set<SimpleLock*>& wrlocks, set<SimpleLock*>& xlocks,
+ bool okexist, bool mustexist, bool alwaysxlock,
+ file_layout_t **layout)
+{
+ const filepath& refpath = n ? mdr->get_filepath2() : mdr->get_filepath();
+
+ dout(10) << "rdlock_path_xlock_dentry " << *mdr << " " << refpath << dendl;
+
+ client_t client = mdr->get_client();
+
+ if (mdr->done_locking)
+ return mdr->dn[n].back();
+
+ CDir *dir = traverse_to_auth_dir(mdr, mdr->dn[n], refpath);
+ if (!dir) return 0;
+
+ CInode *diri = dir->get_inode();
+ if (!mdr->reqid.name.is_mds()) {
+ if (diri->is_system() && !diri->is_root()) {
+ respond_to_request(mdr, -EROFS);
+ return 0;
+ }
+ }
+ if (!diri->is_base() && diri->get_projected_parent_dir()->inode->is_stray()) {
+ respond_to_request(mdr, -ENOENT);
+ return 0;
+ }
+
+ // make a null dentry?
+ const string &dname = refpath.last_dentry();
+ CDentry *dn;
+ if (mustexist) {
+ dn = dir->lookup(dname);
+
+ // make sure dir is complete
+ if (!dn && !dir->is_complete() &&
+ (!dir->has_bloom() || dir->is_in_bloom(dname))) {
+ dout(7) << " incomplete dir contents for " << *dir << ", fetching" << dendl;
+ dir->fetch(new C_MDS_RetryRequest(mdcache, mdr));
+ return 0;
+ }
+
+ // readable?
+ if (dn && !dn->lock.can_read(client) && dn->lock.get_xlock_by() != mdr) {
+ dout(10) << "waiting on xlocked dentry " << *dn << dendl;
+ dn->lock.add_waiter(SimpleLock::WAIT_RD, new C_MDS_RetryRequest(mdcache, mdr));
+ return 0;
+ }
+
+ // exists?
+ if (!dn || dn->get_linkage(client, mdr)->is_null()) {
+ dout(7) << "dentry " << dname << " dne in " << *dir << dendl;
+ respond_to_request(mdr, -ENOENT);
+ return 0;
+ }
+ } else {
+ dn = prepare_null_dentry(mdr, dir, dname, okexist);
+ if (!dn)
+ return 0;
+ }
+
+ mdr->dn[n].push_back(dn);
+ CDentry::linkage_t *dnl = dn->get_linkage(client, mdr);
+ mdr->in[n] = dnl->get_inode();
+
+ // -- lock --
+ // NOTE: rename takes the same set of locks for srcdn
+ for (int i=0; i<(int)mdr->dn[n].size(); i++)
+ rdlocks.insert(&mdr->dn[n][i]->lock);
+ if (alwaysxlock || dnl->is_null())
+ xlocks.insert(&dn->lock); // new dn, xlock
+ else
+ rdlocks.insert(&dn->lock); // existing dn, rdlock
+ wrlocks.insert(&dn->get_dir()->inode->filelock); // also, wrlock on dir mtime
+ wrlocks.insert(&dn->get_dir()->inode->nestlock); // also, wrlock on dir mtime
+ if (layout)
+ mds->locker->include_snap_rdlocks_wlayout(rdlocks, dn->get_dir()->inode, layout);
+ else
+ mds->locker->include_snap_rdlocks(rdlocks, dn->get_dir()->inode);
+
+ return dn;
+}
+
+
+
+
+
+/**
+ * try_open_auth_dirfrag -- open dirfrag, or forward to dirfrag auth
+ *
+ * @param diri base inode
+ * @param fg the exact frag we want
+ * @param mdr request
+ * @returns the pointer, or NULL if it had to be delayed (but mdr is taken care of)
+ */
+CDir* Server::try_open_auth_dirfrag(CInode *diri, frag_t fg, MDRequestRef& mdr)
+{
+ CDir *dir = diri->get_dirfrag(fg);
+
+ // not open and inode not mine?
+ if (!dir && !diri->is_auth()) {
+ mds_rank_t inauth = diri->authority().first;
+ dout(7) << "try_open_auth_dirfrag: not open, not inode auth, fw to mds." << inauth << dendl;
+ mdcache->request_forward(mdr, inauth);
+ return 0;
+ }
+
+ // not open and inode frozen?
+ if (!dir && diri->is_frozen()) {
+ dout(10) << "try_open_auth_dirfrag: dir inode is frozen, waiting " << *diri << dendl;
+ assert(diri->get_parent_dir());
+ diri->add_waiter(CInode::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr));
+ return 0;
+ }
+
+ // invent?
+ if (!dir)
+ dir = diri->get_or_open_dirfrag(mdcache, fg);
+
+ // am i auth for the dirfrag?
+ if (!dir->is_auth()) {
+ mds_rank_t auth = dir->authority().first;
+ dout(7) << "try_open_auth_dirfrag: not auth for " << *dir
+ << ", fw to mds." << auth << dendl;
+ mdcache->request_forward(mdr, auth);
+ return 0;
+ }
+
+ return dir;
+}
+
+
+// ===============================================================================
+// STAT
+
+void Server::handle_client_getattr(MDRequestRef& mdr, bool is_lookup)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ if (req->get_filepath().depth() == 0 && is_lookup) {
+ // refpath can't be empty for lookup but it can for
+ // getattr (we do getattr with empty refpath for mount of '/')
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ CInode *ref = rdlock_path_pin_ref(mdr, 0, rdlocks, false, false, NULL, !is_lookup);
+ if (!ref) return;
+
+ /*
+ * if client currently holds the EXCL cap on a field, do not rdlock
+ * it; client's stat() will result in valid info if _either_ EXCL
+ * cap is held or MDS rdlocks and reads the value here.
+ *
+ * handling this case here is easier than weakening rdlock
+ * semantics... that would cause problems elsewhere.
+ */
+ client_t client = mdr->get_client();
+ int issued = 0;
+ Capability *cap = ref->get_client_cap(client);
+ if (cap && (mdr->snapid == CEPH_NOSNAP ||
+ mdr->snapid <= cap->client_follows))
+ issued = cap->issued();
+
+ int mask = req->head.args.getattr.mask;
+ if ((mask & CEPH_CAP_LINK_SHARED) && (issued & CEPH_CAP_LINK_EXCL) == 0) rdlocks.insert(&ref->linklock);
+ if ((mask & CEPH_CAP_AUTH_SHARED) && (issued & CEPH_CAP_AUTH_EXCL) == 0) rdlocks.insert(&ref->authlock);
+ if ((mask & CEPH_CAP_FILE_SHARED) && (issued & CEPH_CAP_FILE_EXCL) == 0) rdlocks.insert(&ref->filelock);
+ if ((mask & CEPH_CAP_XATTR_SHARED) && (issued & CEPH_CAP_XATTR_EXCL) == 0) rdlocks.insert(&ref->xattrlock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, ref, MAY_READ))
+ return;
+
+ // note which caps are requested, so we return at least a snapshot
+ // value for them. (currently this matters for xattrs and inline data)
+ mdr->getattr_caps = mask;
+
+ mds->balancer->hit_inode(ceph_clock_now(), ref, META_POP_IRD,
+ req->get_source().num());
+
+ // reply
+ dout(10) << "reply to stat on " << *req << dendl;
+ mdr->tracei = ref;
+ if (is_lookup)
+ mdr->tracedn = mdr->dn[0].back();
+ respond_to_request(mdr, 0);
+}
+
+struct C_MDS_LookupIno2 : public ServerContext {
+ MDRequestRef mdr;
+ C_MDS_LookupIno2(Server *s, MDRequestRef& r) : ServerContext(s), mdr(r) {}
+ void finish(int r) override {
+ server->_lookup_ino_2(mdr, r);
+ }
+};
+
+/* This function DOES clean up the mdr before returning*/
+/*
+ * filepath: ino
+ */
+void Server::handle_client_lookup_ino(MDRequestRef& mdr,
+ bool want_parent, bool want_dentry)
+{
+ MClientRequest *req = mdr->client_request;
+
+ inodeno_t ino = req->get_filepath().get_ino();
+ CInode *in = mdcache->get_inode(ino);
+ if (in && in->state_test(CInode::STATE_PURGING)) {
+ respond_to_request(mdr, -ESTALE);
+ return;
+ }
+ if (!in) {
+ mdcache->open_ino(ino, (int64_t)-1, new C_MDS_LookupIno2(this, mdr), false);
+ return;
+ }
+
+ if (mdr && in->snaprealm && !in->snaprealm->is_open() &&
+ !in->snaprealm->open_parents(new C_MDS_RetryRequest(mdcache, mdr))) {
+ return;
+ }
+
+ // check for nothing (not read or write); this still applies the
+ // path check.
+ if (!check_access(mdr, in, 0))
+ return;
+
+ CDentry *dn = in->get_projected_parent_dn();
+ CInode *diri = dn ? dn->get_dir()->inode : NULL;
+
+ set<SimpleLock*> rdlocks;
+ if (dn && (want_parent || want_dentry)) {
+ mdr->pin(dn);
+ rdlocks.insert(&dn->lock);
+ }
+
+ unsigned mask = req->head.args.getattr.mask;
+ if (mask) {
+ Capability *cap = in->get_client_cap(mdr->get_client());
+ int issued = 0;
+ if (cap && (mdr->snapid == CEPH_NOSNAP || mdr->snapid <= cap->client_follows))
+ issued = cap->issued();
+ // permission bits, ACL/security xattrs
+ if ((mask & CEPH_CAP_AUTH_SHARED) && (issued & CEPH_CAP_AUTH_EXCL) == 0)
+ rdlocks.insert(&in->authlock);
+ if ((mask & CEPH_CAP_XATTR_SHARED) && (issued & CEPH_CAP_XATTR_EXCL) == 0)
+ rdlocks.insert(&in->xattrlock);
+
+ mdr->getattr_caps = mask;
+ }
+
+ if (!rdlocks.empty()) {
+ set<SimpleLock*> wrlocks, xlocks;
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (diri != NULL) {
+ // need read access to directory inode
+ if (!check_access(mdr, diri, MAY_READ))
+ return;
+ }
+ }
+
+ if (want_parent) {
+ if (in->is_base()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (!diri || diri->is_stray()) {
+ respond_to_request(mdr, -ESTALE);
+ return;
+ }
+ dout(10) << "reply to lookup_parent " << *in << dendl;
+ mdr->tracei = diri;
+ respond_to_request(mdr, 0);
+ } else {
+ if (want_dentry) {
+ inodeno_t dirino = req->get_filepath2().get_ino();
+ if (!diri || (dirino != inodeno_t() && diri->ino() != dirino)) {
+ respond_to_request(mdr, -ENOENT);
+ return;
+ }
+ dout(10) << "reply to lookup_name " << *in << dendl;
+ } else
+ dout(10) << "reply to lookup_ino " << *in << dendl;
+
+ mdr->tracei = in;
+ if (want_dentry)
+ mdr->tracedn = dn;
+ respond_to_request(mdr, 0);
+ }
+}
+
+void Server::_lookup_ino_2(MDRequestRef& mdr, int r)
+{
+ inodeno_t ino = mdr->client_request->get_filepath().get_ino();
+ dout(10) << "_lookup_ino_2 " << mdr.get() << " ino " << ino << " r=" << r << dendl;
+
+ // `r` is a rank if >=0, else an error code
+ if (r >= 0) {
+ mds_rank_t dest_rank(r);
+ if (dest_rank == mds->get_nodeid())
+ dispatch_client_request(mdr);
+ else
+ mdcache->request_forward(mdr, dest_rank);
+ return;
+ }
+
+ // give up
+ if (r == -ENOENT || r == -ENODATA)
+ r = -ESTALE;
+ respond_to_request(mdr, r);
+}
+
+
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_open(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ dout(7) << "open on " << req->get_filepath() << dendl;
+
+ int flags = req->head.args.open.flags;
+ int cmode = ceph_flags_to_mode(flags);
+ if (cmode < 0) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ bool need_auth = !file_mode_is_readonly(cmode) ||
+ (flags & (CEPH_O_TRUNC | CEPH_O_DIRECTORY));
+
+ if ((cmode & CEPH_FILE_MODE_WR) && mdcache->is_readonly()) {
+ dout(7) << "read-only FS" << dendl;
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, need_auth);
+ if (!cur)
+ return;
+
+ if (cur->is_frozen() || cur->state_test(CInode::STATE_EXPORTINGCAPS)) {
+ assert(!need_auth);
+ mdr->done_locking = false;
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur)
+ return;
+ }
+
+ if (!cur->inode.is_file()) {
+ // can only open non-regular inode with mode FILE_MODE_PIN, at least for now.
+ cmode = CEPH_FILE_MODE_PIN;
+ // the inode is symlink and client wants to follow it, ignore the O_TRUNC flag.
+ if (cur->inode.is_symlink() && !(flags & CEPH_O_NOFOLLOW))
+ flags &= ~CEPH_O_TRUNC;
+ }
+
+ dout(10) << "open flags = " << flags
+ << ", filemode = " << cmode
+ << ", need_auth = " << need_auth
+ << dendl;
+
+ // regular file?
+ /*if (!cur->inode.is_file() && !cur->inode.is_dir()) {
+ dout(7) << "not a file or dir " << *cur << dendl;
+ respond_to_request(mdr, -ENXIO); // FIXME what error do we want?
+ return;
+ }*/
+ if ((flags & CEPH_O_DIRECTORY) && !cur->inode.is_dir() && !cur->inode.is_symlink()) {
+ dout(7) << "specified O_DIRECTORY on non-directory " << *cur << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ if ((flags & CEPH_O_TRUNC) && !cur->inode.is_file()) {
+ dout(7) << "specified O_TRUNC on !(file|symlink) " << *cur << dendl;
+ // we should return -EISDIR for directory, return -EINVAL for other non-regular
+ respond_to_request(mdr, cur->inode.is_dir() ? -EISDIR : -EINVAL);
+ return;
+ }
+
+ if (cur->inode.inline_data.version != CEPH_INLINE_NONE &&
+ !mdr->session->connection->has_feature(CEPH_FEATURE_MDS_INLINE_DATA)) {
+ dout(7) << "old client cannot open inline data file " << *cur << dendl;
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ // snapped data is read only
+ if (mdr->snapid != CEPH_NOSNAP &&
+ ((cmode & CEPH_FILE_MODE_WR) || req->may_write())) {
+ dout(7) << "snap " << mdr->snapid << " is read-only " << *cur << dendl;
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ unsigned mask = req->head.args.open.mask;
+ if (mask) {
+ Capability *cap = cur->get_client_cap(mdr->get_client());
+ int issued = 0;
+ if (cap && (mdr->snapid == CEPH_NOSNAP || mdr->snapid <= cap->client_follows))
+ issued = cap->issued();
+ // permission bits, ACL/security xattrs
+ if ((mask & CEPH_CAP_AUTH_SHARED) && (issued & CEPH_CAP_AUTH_EXCL) == 0)
+ rdlocks.insert(&cur->authlock);
+ if ((mask & CEPH_CAP_XATTR_SHARED) && (issued & CEPH_CAP_XATTR_EXCL) == 0)
+ rdlocks.insert(&cur->xattrlock);
+
+ mdr->getattr_caps = mask;
+ }
+
+ // O_TRUNC
+ if ((flags & CEPH_O_TRUNC) && !mdr->has_completed) {
+ assert(cur->is_auth());
+
+ xlocks.insert(&cur->filelock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, cur, MAY_WRITE))
+ return;
+
+ // wait for pending truncate?
+ const inode_t *pi = cur->get_projected_inode();
+ if (pi->is_truncating()) {
+ dout(10) << " waiting for pending truncate from " << pi->truncate_from
+ << " to " << pi->truncate_size << " to complete on " << *cur << dendl;
+ mds->locker->drop_locks(mdr.get());
+ mdr->drop_local_auth_pins();
+ cur->add_waiter(CInode::WAIT_TRUNC, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+
+ do_open_truncate(mdr, cmode);
+ return;
+ }
+
+ // sync filelock if snapped.
+ // this makes us wait for writers to flushsnaps, ensuring we get accurate metadata,
+ // and that data itself is flushed so that we can read the snapped data off disk.
+ if (mdr->snapid != CEPH_NOSNAP && !cur->is_dir()) {
+ rdlocks.insert(&cur->filelock);
+ }
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ mask = MAY_READ;
+ if (cmode & CEPH_FILE_MODE_WR)
+ mask |= MAY_WRITE;
+ if (!check_access(mdr, cur, mask))
+ return;
+
+ if (cur->is_file() || cur->is_dir()) {
+ if (mdr->snapid == CEPH_NOSNAP) {
+ // register new cap
+ Capability *cap = mds->locker->issue_new_caps(cur, cmode, mdr->session, 0, req->is_replay());
+ if (cap)
+ dout(12) << "open issued caps " << ccap_string(cap->pending())
+ << " for " << req->get_source()
+ << " on " << *cur << dendl;
+ } else {
+ int caps = ceph_caps_for_mode(cmode);
+ dout(12) << "open issued IMMUTABLE SNAP caps " << ccap_string(caps)
+ << " for " << req->get_source()
+ << " snapid " << mdr->snapid
+ << " on " << *cur << dendl;
+ mdr->snap_caps = caps;
+ }
+ }
+
+ // increase max_size?
+ if (cmode & CEPH_FILE_MODE_WR)
+ mds->locker->check_inode_max_size(cur);
+
+ // make sure this inode gets into the journal
+ if (cur->is_auth() && cur->last == CEPH_NOSNAP &&
+ !cur->item_open_file.is_on_list()) {
+ LogSegment *ls = mds->mdlog->get_current_segment();
+ EOpen *le = new EOpen(mds->mdlog);
+ mdlog->start_entry(le);
+ le->add_clean_inode(cur);
+ ls->open_files.push_back(&cur->item_open_file);
+ mdlog->submit_entry(le);
+ }
+
+ // hit pop
+ if (cmode & CEPH_FILE_MODE_WR)
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), cur, META_POP_IWR);
+ else
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), cur, META_POP_IRD,
+ mdr->client_request->get_source().num());
+
+ CDentry *dn = 0;
+ if (req->get_dentry_wanted()) {
+ assert(mdr->dn[0].size());
+ dn = mdr->dn[0].back();
+ }
+
+ mdr->tracei = cur;
+ mdr->tracedn = dn;
+ respond_to_request(mdr, 0);
+}
+
+class C_MDS_openc_finish : public ServerLogContext {
+ CDentry *dn;
+ CInode *newi;
+ snapid_t follows;
+public:
+ C_MDS_openc_finish(Server *s, MDRequestRef& r, CDentry *d, CInode *ni, snapid_t f) :
+ ServerLogContext(s, r), dn(d), newi(ni), follows(f) {}
+ void finish(int r) override {
+ assert(r == 0);
+
+ dn->pop_projected_linkage();
+
+ // dirty inode, dn, dir
+ newi->inode.version--; // a bit hacky, see C_MDS_mknod_finish
+ newi->mark_dirty(newi->inode.version+1, mdr->ls);
+ newi->_mark_dirty_parent(mdr->ls, true);
+
+ mdr->apply();
+
+ get_mds()->locker->share_inode_max_size(newi);
+
+ MDRequestRef null_ref;
+ get_mds()->mdcache->send_dentry_link(dn, null_ref);
+
+ get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), newi, META_POP_IWR);
+
+ server->respond_to_request(mdr, 0);
+
+ assert(g_conf->mds_kill_openc_at != 1);
+ }
+};
+
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_openc(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ client_t client = mdr->get_client();
+
+ dout(7) << "open w/ O_CREAT on " << req->get_filepath() << dendl;
+
+ int cmode = ceph_flags_to_mode(req->head.args.open.flags);
+ if (cmode < 0) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ bool excl = req->head.args.open.flags & CEPH_O_EXCL;
+
+ if (!excl) {
+ int r = mdcache->path_traverse(mdr, NULL, NULL, req->get_filepath(),
+ &mdr->dn[0], NULL, MDS_TRAVERSE_FORWARD);
+ if (r > 0) return;
+ if (r == 0) {
+ // it existed.
+ handle_client_open(mdr);
+ return;
+ }
+ if (r < 0 && r != -ENOENT) {
+ if (r == -ESTALE) {
+ dout(10) << "FAIL on ESTALE but attempting recovery" << dendl;
+ MDSInternalContextBase *c = new C_MDS_TryFindInode(this, mdr);
+ mdcache->find_ino_peers(req->get_filepath().get_ino(), c);
+ } else {
+ dout(10) << "FAIL on error " << r << dendl;
+ respond_to_request(mdr, r);
+ }
+ return;
+ }
+ }
+
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ file_layout_t *dir_layout = NULL;
+ CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks,
+ !excl, false, false, &dir_layout);
+ if (!dn) return;
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ // set layout
+ file_layout_t layout;
+ if (dir_layout)
+ layout = *dir_layout;
+ else
+ layout = mdcache->default_file_layout;
+
+ // What kind of client caps are required to complete this operation
+ uint64_t access = MAY_WRITE;
+
+ const auto default_layout = layout;
+
+ // fill in any special params from client
+ if (req->head.args.open.stripe_unit)
+ layout.stripe_unit = req->head.args.open.stripe_unit;
+ if (req->head.args.open.stripe_count)
+ layout.stripe_count = req->head.args.open.stripe_count;
+ if (req->head.args.open.object_size)
+ layout.object_size = req->head.args.open.object_size;
+ if (req->get_connection()->has_feature(CEPH_FEATURE_CREATEPOOLID) &&
+ (__s32)req->head.args.open.pool >= 0) {
+ layout.pool_id = req->head.args.open.pool;
+
+ // make sure we have as new a map as the client
+ if (req->get_mdsmap_epoch() > mds->mdsmap->get_epoch()) {
+ mds->wait_for_mdsmap(req->get_mdsmap_epoch(), new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ }
+
+ // If client doesn't have capability to modify layout pools, then
+ // only permit this request if the requested pool matches what the
+ // file would have inherited anyway from its parent.
+ if (default_layout != layout) {
+ access |= MAY_SET_VXATTR;
+ }
+
+ if (!layout.is_valid()) {
+ dout(10) << " invalid initial file layout" << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (!mds->mdsmap->is_data_pool(layout.pool_id)) {
+ dout(10) << " invalid data pool " << layout.pool_id << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ // created null dn.
+ CDir *dir = dn->get_dir();
+ CInode *diri = dir->get_inode();
+ rdlocks.insert(&diri->authlock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, access))
+ return;
+
+ if (!check_fragment_space(mdr, dir))
+ return;
+
+ CDentry::linkage_t *dnl = dn->get_projected_linkage();
+
+ if (!dnl->is_null()) {
+ // it existed.
+ assert(req->head.args.open.flags & CEPH_O_EXCL);
+ dout(10) << "O_EXCL, target exists, failing with -EEXIST" << dendl;
+ mdr->tracei = dnl->get_inode();
+ mdr->tracedn = dn;
+ respond_to_request(mdr, -EEXIST);
+ return;
+ }
+
+ // create inode.
+ SnapRealm *realm = diri->find_snaprealm(); // use directory's realm; inode isn't attached yet.
+ snapid_t follows = realm->get_newest_seq();
+
+ CInode *in = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino),
+ req->head.args.open.mode | S_IFREG, &layout);
+ assert(in);
+
+ // it's a file.
+ dn->push_projected_linkage(in);
+
+ in->inode.version = dn->pre_dirty();
+ if (layout.pool_id != mdcache->default_file_layout.pool_id)
+ in->inode.add_old_pool(mdcache->default_file_layout.pool_id);
+ in->inode.update_backtrace();
+ if (cmode & CEPH_FILE_MODE_WR) {
+ in->inode.client_ranges[client].range.first = 0;
+ in->inode.client_ranges[client].range.last = in->inode.get_layout_size_increment();
+ in->inode.client_ranges[client].follows = follows;
+ }
+ in->inode.rstat.rfiles = 1;
+
+ assert(dn->first == follows+1);
+ in->first = dn->first;
+
+ // prepare finisher
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "openc");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ journal_allocated_inos(mdr, &le->metablob);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, in, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1);
+ le->metablob.add_primary_dentry(dn, in, true, true, true);
+
+ // do the open
+ mds->locker->issue_new_caps(in, cmode, mdr->session, realm, req->is_replay());
+ in->authlock.set_state(LOCK_EXCL);
+ in->xattrlock.set_state(LOCK_EXCL);
+
+ // make sure this inode gets into the journal
+ le->metablob.add_opened_ino(in->ino());
+ LogSegment *ls = mds->mdlog->get_current_segment();
+ ls->open_files.push_back(&in->item_open_file);
+
+ C_MDS_openc_finish *fin = new C_MDS_openc_finish(this, mdr, dn, in, follows);
+
+ if (mdr->client_request->get_connection()->has_feature(CEPH_FEATURE_REPLY_CREATE_INODE)) {
+ dout(10) << "adding ino to reply to indicate inode was created" << dendl;
+ // add the file created flag onto the reply if create_flags features is supported
+ ::encode(in->inode.ino, mdr->reply_extra_bl);
+ }
+
+ journal_and_reply(mdr, in, dn, le, fin);
+
+ // We hit_dir (via hit_inode) in our finish callback, but by then we might
+ // have overshot the split size (multiple opencs in flight), so here is
+ // an early chance to split the dir if this openc makes it oversized.
+ mds->balancer->maybe_fragment(dir, false);
+}
+
+
+
+void Server::handle_client_readdir(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ client_t client = req->get_source().num();
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CInode *diri = rdlock_path_pin_ref(mdr, 0, rdlocks, false, true);
+ if (!diri) return;
+
+ // it's a directory, right?
+ if (!diri->is_dir()) {
+ // not a dir
+ dout(10) << "reply to " << *req << " readdir -ENOTDIR" << dendl;
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+
+ rdlocks.insert(&diri->filelock);
+ rdlocks.insert(&diri->dirfragtreelock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_READ))
+ return;
+
+ // which frag?
+ frag_t fg = (__u32)req->head.args.readdir.frag;
+ unsigned req_flags = (__u32)req->head.args.readdir.flags;
+ string offset_str = req->get_path2();
+
+ __u32 offset_hash = 0;
+ if (!offset_str.empty())
+ offset_hash = ceph_frag_value(diri->hash_dentry_name(offset_str));
+ else
+ offset_hash = (__u32)req->head.args.readdir.offset_hash;
+
+ dout(10) << " frag " << fg << " offset '" << offset_str << "'"
+ << " offset_hash " << offset_hash << " flags " << req_flags << dendl;
+
+ // does the frag exist?
+ if (diri->dirfragtree[fg.value()] != fg) {
+ frag_t newfg;
+ if (req_flags & CEPH_READDIR_REPLY_BITFLAGS) {
+ if (fg.contains((unsigned)offset_hash)) {
+ newfg = diri->dirfragtree[offset_hash];
+ } else {
+ // client actually wants next frag
+ newfg = diri->dirfragtree[fg.value()];
+ }
+ } else {
+ offset_str.clear();
+ newfg = diri->dirfragtree[fg.value()];
+ }
+ dout(10) << " adjust frag " << fg << " -> " << newfg << " " << diri->dirfragtree << dendl;
+ fg = newfg;
+ }
+
+ CDir *dir = try_open_auth_dirfrag(diri, fg, mdr);
+ if (!dir) return;
+
+ // ok!
+ dout(10) << "handle_client_readdir on " << *dir << dendl;
+ assert(dir->is_auth());
+
+ if (!dir->is_complete()) {
+ if (dir->is_frozen()) {
+ dout(7) << "dir is frozen " << *dir << dendl;
+ mds->locker->drop_locks(mdr.get());
+ mdr->drop_local_auth_pins();
+ dir->add_waiter(CDir::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ // fetch
+ dout(10) << " incomplete dir contents for readdir on " << *dir << ", fetching" << dendl;
+ dir->fetch(new C_MDS_RetryRequest(mdcache, mdr), true);
+ return;
+ }
+
+#ifdef MDS_VERIFY_FRAGSTAT
+ dir->verify_fragstat();
+#endif
+
+ utime_t now = ceph_clock_now();
+ mdr->set_mds_stamp(now);
+
+ snapid_t snapid = mdr->snapid;
+ dout(10) << "snapid " << snapid << dendl;
+
+ SnapRealm *realm = diri->find_snaprealm();
+
+ unsigned max = req->head.args.readdir.max_entries;
+ if (!max)
+ max = dir->get_num_any(); // whatever, something big.
+ unsigned max_bytes = req->head.args.readdir.max_bytes;
+ if (!max_bytes)
+ // make sure at least one item can be encoded
+ max_bytes = (512 << 10) + g_conf->mds_max_xattr_pairs_size;
+
+ // start final blob
+ bufferlist dirbl;
+ dir->encode_dirstat(dirbl, mds->get_nodeid());
+
+ // count bytes available.
+ // this isn't perfect, but we should capture the main variable/unbounded size items!
+ int front_bytes = dirbl.length() + sizeof(__u32) + sizeof(__u8)*2;
+ int bytes_left = max_bytes - front_bytes;
+ bytes_left -= realm->get_snap_trace().length();
+
+ // build dir contents
+ bufferlist dnbl;
+ __u32 numfiles = 0;
+ bool start = !offset_hash && offset_str.empty();
+ // skip all dns < dentry_key_t(snapid, offset_str, offset_hash)
+ dentry_key_t skip_key(snapid, offset_str.c_str(), offset_hash);
+ auto it = start ? dir->begin() : dir->lower_bound(skip_key);
+ bool end = (it == dir->end());
+ for (; !end && numfiles < max; end = (it == dir->end())) {
+ CDentry *dn = it->second;
+ ++it;
+
+ if (dn->state_test(CDentry::STATE_PURGING))
+ continue;
+
+ bool dnp = dn->use_projected(client, mdr);
+ CDentry::linkage_t *dnl = dnp ? dn->get_projected_linkage() : dn->get_linkage();
+
+ if (dnl->is_null())
+ continue;
+
+ if (dn->last < snapid || dn->first > snapid) {
+ dout(20) << "skipping non-overlapping snap " << *dn << dendl;
+ continue;
+ }
+
+ if (!start) {
+ dentry_key_t offset_key(dn->last, offset_str.c_str(), offset_hash);
+ if (!(offset_key < dn->key()))
+ continue;
+ }
+
+ CInode *in = dnl->get_inode();
+
+ if (in && in->ino() == CEPH_INO_CEPH)
+ continue;
+
+ // remote link?
+ // better for the MDS to do the work, if we think the client will stat any of these files.
+ if (dnl->is_remote() && !in) {
+ in = mdcache->get_inode(dnl->get_remote_ino());
+ if (in) {
+ dn->link_remote(dnl, in);
+ } else if (dn->state_test(CDentry::STATE_BADREMOTEINO)) {
+ dout(10) << "skipping bad remote ino on " << *dn << dendl;
+ continue;
+ } else {
+ // touch everything i _do_ have
+ for (CDir::map_t::iterator p = dir->begin(); p != dir->end(); ++p)
+ if (!p->second->get_linkage()->is_null())
+ mdcache->lru.lru_touch(p->second);
+
+ // already issued caps and leases, reply immediately.
+ if (dnbl.length() > 0) {
+ mdcache->open_remote_dentry(dn, dnp, new C_MDSInternalNoop);
+ dout(10) << " open remote dentry after caps were issued, stopping at "
+ << dnbl.length() << " < " << bytes_left << dendl;
+ break;
+ }
+
+ mds->locker->drop_locks(mdr.get());
+ mdr->drop_local_auth_pins();
+ mdcache->open_remote_dentry(dn, dnp, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ }
+ assert(in);
+
+ if ((int)(dnbl.length() + dn->name.length() + sizeof(__u32) + sizeof(LeaseStat)) > bytes_left) {
+ dout(10) << " ran out of room, stopping at " << dnbl.length() << " < " << bytes_left << dendl;
+ break;
+ }
+
+ unsigned start_len = dnbl.length();
+
+ // dentry
+ dout(12) << "including dn " << *dn << dendl;
+ ::encode(dn->name, dnbl);
+ mds->locker->issue_client_lease(dn, client, dnbl, now, mdr->session);
+
+ // inode
+ dout(12) << "including inode " << *in << dendl;
+ int r = in->encode_inodestat(dnbl, mdr->session, realm, snapid, bytes_left - (int)dnbl.length());
+ if (r < 0) {
+ // chop off dn->name, lease
+ dout(10) << " ran out of room, stopping at " << start_len << " < " << bytes_left << dendl;
+ bufferlist keep;
+ keep.substr_of(dnbl, 0, start_len);
+ dnbl.swap(keep);
+ break;
+ }
+ assert(r >= 0);
+ numfiles++;
+
+ // touch dn
+ mdcache->lru.lru_touch(dn);
+ }
+
+ __u16 flags = 0;
+ if (end) {
+ flags = CEPH_READDIR_FRAG_END;
+ if (start)
+ flags |= CEPH_READDIR_FRAG_COMPLETE; // FIXME: what purpose does this serve
+ }
+ // client only understand END and COMPLETE flags ?
+ if (req_flags & CEPH_READDIR_REPLY_BITFLAGS) {
+ flags |= CEPH_READDIR_HASH_ORDER | CEPH_READDIR_OFFSET_HASH;
+ }
+
+ // finish final blob
+ ::encode(numfiles, dirbl);
+ ::encode(flags, dirbl);
+ dirbl.claim_append(dnbl);
+
+ // yay, reply
+ dout(10) << "reply to " << *req << " readdir num=" << numfiles
+ << " bytes=" << dirbl.length()
+ << " start=" << (int)start
+ << " end=" << (int)end
+ << dendl;
+ mdr->reply_extra_bl = dirbl;
+
+ // bump popularity. NOTE: this doesn't quite capture it.
+ mds->balancer->hit_dir(now, dir, META_POP_IRD, -1, numfiles);
+
+ // reply
+ mdr->tracei = diri;
+ respond_to_request(mdr, 0);
+}
+
+
+
+// ===============================================================================
+// INODE UPDATES
+
+
+/*
+ * finisher for basic inode updates
+ */
+class C_MDS_inode_update_finish : public ServerLogContext {
+ CInode *in;
+ bool truncating_smaller, changed_ranges;
+public:
+ C_MDS_inode_update_finish(Server *s, MDRequestRef& r, CInode *i,
+ bool sm=false, bool cr=false) :
+ ServerLogContext(s, r), in(i), truncating_smaller(sm), changed_ranges(cr) { }
+ void finish(int r) override {
+ assert(r == 0);
+
+ // apply
+ in->pop_and_dirty_projected_inode(mdr->ls);
+ mdr->apply();
+
+ // notify any clients
+ if (truncating_smaller && in->inode.is_truncating()) {
+ get_mds()->locker->issue_truncate(in);
+ get_mds()->mdcache->truncate_inode(in, mdr->ls);
+ }
+
+ get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), in, META_POP_IWR);
+
+ server->respond_to_request(mdr, 0);
+
+ if (changed_ranges)
+ get_mds()->locker->share_inode_max_size(in);
+ }
+};
+
+void Server::handle_client_file_setlock(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ // get the inode to operate on, and set up any locks needed for that
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur)
+ return;
+
+ xlocks.insert(&cur->flocklock);
+ /* acquire_locks will return true if it gets the locks. If it fails,
+ it will redeliver this request at a later date, so drop the request.
+ */
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) {
+ dout(10) << "handle_client_file_setlock could not get locks!" << dendl;
+ return;
+ }
+
+ // copy the lock change into a ceph_filelock so we can store/apply it
+ ceph_filelock set_lock;
+ set_lock.start = req->head.args.filelock_change.start;
+ set_lock.length = req->head.args.filelock_change.length;
+ set_lock.client = req->get_orig_source().num();
+ set_lock.owner = req->head.args.filelock_change.owner;
+ set_lock.pid = req->head.args.filelock_change.pid;
+ set_lock.type = req->head.args.filelock_change.type;
+ bool will_wait = req->head.args.filelock_change.wait;
+
+ dout(10) << "handle_client_file_setlock: " << set_lock << dendl;
+
+ ceph_lock_state_t *lock_state = NULL;
+ bool interrupt = false;
+
+ // get the appropriate lock state
+ switch (req->head.args.filelock_change.rule) {
+ case CEPH_LOCK_FLOCK_INTR:
+ interrupt = true;
+ // fall-thru
+ case CEPH_LOCK_FLOCK:
+ lock_state = cur->get_flock_lock_state();
+ break;
+
+ case CEPH_LOCK_FCNTL_INTR:
+ interrupt = true;
+ // fall-thru
+ case CEPH_LOCK_FCNTL:
+ lock_state = cur->get_fcntl_lock_state();
+ break;
+
+ default:
+ dout(10) << "got unknown lock type " << set_lock.type
+ << ", dropping request!" << dendl;
+ respond_to_request(mdr, -EOPNOTSUPP);
+ return;
+ }
+
+ dout(10) << " state prior to lock change: " << *lock_state << dendl;
+ if (CEPH_LOCK_UNLOCK == set_lock.type) {
+ list<ceph_filelock> activated_locks;
+ list<MDSInternalContextBase*> waiters;
+ if (lock_state->is_waiting(set_lock)) {
+ dout(10) << " unlock removing waiting lock " << set_lock << dendl;
+ lock_state->remove_waiting(set_lock);
+ cur->take_waiting(CInode::WAIT_FLOCK, waiters);
+ } else if (!interrupt) {
+ dout(10) << " unlock attempt on " << set_lock << dendl;
+ lock_state->remove_lock(set_lock, activated_locks);
+ cur->take_waiting(CInode::WAIT_FLOCK, waiters);
+ }
+ mds->queue_waiters(waiters);
+
+ respond_to_request(mdr, 0);
+ } else {
+ dout(10) << " lock attempt on " << set_lock << dendl;
+ bool deadlock = false;
+ if (mdr->more()->flock_was_waiting &&
+ !lock_state->is_waiting(set_lock)) {
+ dout(10) << " was waiting for lock but not anymore, must have been canceled " << set_lock << dendl;
+ respond_to_request(mdr, -EINTR);
+ } else if (!lock_state->add_lock(set_lock, will_wait, mdr->more()->flock_was_waiting, &deadlock)) {
+ dout(10) << " it failed on this attempt" << dendl;
+ // couldn't set lock right now
+ if (deadlock) {
+ respond_to_request(mdr, -EDEADLK);
+ } else if (!will_wait) {
+ respond_to_request(mdr, -EWOULDBLOCK);
+ } else {
+ dout(10) << " added to waiting list" << dendl;
+ assert(lock_state->is_waiting(set_lock));
+ mdr->more()->flock_was_waiting = true;
+ mds->locker->drop_locks(mdr.get());
+ mdr->drop_local_auth_pins();
+ cur->add_waiter(CInode::WAIT_FLOCK, new C_MDS_RetryRequest(mdcache, mdr));
+ }
+ } else
+ respond_to_request(mdr, 0);
+ }
+ dout(10) << " state after lock change: " << *lock_state << dendl;
+}
+
+void Server::handle_client_file_readlock(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ // get the inode to operate on, and set up any locks needed for that
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur)
+ return;
+
+ /* acquire_locks will return true if it gets the locks. If it fails,
+ it will redeliver this request at a later date, so drop the request.
+ */
+ rdlocks.insert(&cur->flocklock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) {
+ dout(10) << "handle_client_file_readlock could not get locks!" << dendl;
+ return;
+ }
+
+ // copy the lock change into a ceph_filelock so we can store/apply it
+ ceph_filelock checking_lock;
+ checking_lock.start = req->head.args.filelock_change.start;
+ checking_lock.length = req->head.args.filelock_change.length;
+ checking_lock.client = req->get_orig_source().num();
+ checking_lock.owner = req->head.args.filelock_change.owner;
+ checking_lock.pid = req->head.args.filelock_change.pid;
+ checking_lock.type = req->head.args.filelock_change.type;
+
+ // get the appropriate lock state
+ ceph_lock_state_t *lock_state = NULL;
+ switch (req->head.args.filelock_change.rule) {
+ case CEPH_LOCK_FLOCK:
+ lock_state = cur->get_flock_lock_state();
+ break;
+
+ case CEPH_LOCK_FCNTL:
+ lock_state = cur->get_fcntl_lock_state();
+ break;
+
+ default:
+ dout(10) << "got unknown lock type " << checking_lock.type << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ lock_state->look_for_lock(checking_lock);
+
+ bufferlist lock_bl;
+ ::encode(checking_lock, lock_bl);
+
+ mdr->reply_extra_bl = lock_bl;
+ respond_to_request(mdr, 0);
+}
+
+void Server::handle_client_setattr(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur) return;
+
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ if (cur->ino() < MDS_INO_SYSTEM_BASE && !cur->is_base()) {
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ __u32 mask = req->head.args.setattr.mask;
+ __u32 access_mask = MAY_WRITE;
+
+ // xlock inode
+ if (mask & (CEPH_SETATTR_MODE|CEPH_SETATTR_UID|CEPH_SETATTR_GID|CEPH_SETATTR_BTIME|CEPH_SETATTR_KILL_SGUID))
+ xlocks.insert(&cur->authlock);
+ if (mask & (CEPH_SETATTR_MTIME|CEPH_SETATTR_ATIME|CEPH_SETATTR_SIZE))
+ xlocks.insert(&cur->filelock);
+ if (mask & CEPH_SETATTR_CTIME)
+ wrlocks.insert(&cur->versionlock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if ((mask & CEPH_SETATTR_UID) && (cur->inode.uid != req->head.args.setattr.uid))
+ access_mask |= MAY_CHOWN;
+
+ if ((mask & CEPH_SETATTR_GID) && (cur->inode.gid != req->head.args.setattr.gid))
+ access_mask |= MAY_CHGRP;
+
+ if (!check_access(mdr, cur, access_mask))
+ return;
+
+ // trunc from bigger -> smaller?
+ inode_t *pi = cur->get_projected_inode();
+
+ uint64_t old_size = MAX(pi->size, req->head.args.setattr.old_size);
+
+ // ENOSPC on growing file while full, but allow shrinks
+ if (is_full && req->head.args.setattr.size > old_size) {
+ dout(20) << __func__ << ": full, responding ENOSPC to setattr with larger size" << dendl;
+ respond_to_request(mdr, -ENOSPC);
+ return;
+ }
+
+ bool truncating_smaller = false;
+ if (mask & CEPH_SETATTR_SIZE) {
+ truncating_smaller = req->head.args.setattr.size < old_size;
+ if (truncating_smaller && pi->is_truncating()) {
+ dout(10) << " waiting for pending truncate from " << pi->truncate_from
+ << " to " << pi->truncate_size << " to complete on " << *cur << dendl;
+ mds->locker->drop_locks(mdr.get());
+ mdr->drop_local_auth_pins();
+ cur->add_waiter(CInode::WAIT_TRUNC, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ }
+
+ bool changed_ranges = false;
+
+ // project update
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "setattr");
+ mdlog->start_entry(le);
+
+ pi = cur->project_inode();
+
+ if (mask & CEPH_SETATTR_UID)
+ pi->uid = req->head.args.setattr.uid;
+ if (mask & CEPH_SETATTR_GID)
+ pi->gid = req->head.args.setattr.gid;
+
+ if (mask & CEPH_SETATTR_MODE)
+ pi->mode = (pi->mode & ~07777) | (req->head.args.setattr.mode & 07777);
+ else if ((mask & (CEPH_SETATTR_UID|CEPH_SETATTR_GID|CEPH_SETATTR_KILL_SGUID)) &&
+ S_ISREG(pi->mode) &&
+ (pi->mode & (S_IXUSR|S_IXGRP|S_IXOTH))) {
+ pi->mode &= ~(S_ISUID|S_ISGID);
+ }
+
+ if (mask & CEPH_SETATTR_MTIME)
+ pi->mtime = req->head.args.setattr.mtime;
+ if (mask & CEPH_SETATTR_ATIME)
+ pi->atime = req->head.args.setattr.atime;
+ if (mask & CEPH_SETATTR_BTIME)
+ pi->btime = req->head.args.setattr.btime;
+ if (mask & (CEPH_SETATTR_ATIME | CEPH_SETATTR_MTIME | CEPH_SETATTR_BTIME))
+ pi->time_warp_seq++; // maybe not a timewarp, but still a serialization point.
+ if (mask & CEPH_SETATTR_SIZE) {
+ if (truncating_smaller) {
+ pi->truncate(old_size, req->head.args.setattr.size);
+ le->metablob.add_truncate_start(cur->ino());
+ } else {
+ pi->size = req->head.args.setattr.size;
+ pi->rstat.rbytes = pi->size;
+ }
+ pi->mtime = mdr->get_op_stamp();
+
+ // adjust client's max_size?
+ map<client_t,client_writeable_range_t> new_ranges;
+ bool max_increased = false;
+ mds->locker->calc_new_client_ranges(cur, pi->size, &new_ranges, &max_increased);
+ if (pi->client_ranges != new_ranges) {
+ dout(10) << " client_ranges " << pi->client_ranges << " -> " << new_ranges << dendl;
+ pi->client_ranges = new_ranges;
+ changed_ranges = true;
+ }
+ }
+
+ pi->version = cur->pre_dirty();
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+
+ // log + wait
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur,
+ truncating_smaller, changed_ranges));
+
+ // flush immediately if there are readers/writers waiting
+ if (xlocks.count(&cur->filelock) &&
+ (cur->get_caps_wanted() & (CEPH_CAP_FILE_RD|CEPH_CAP_FILE_WR)))
+ mds->mdlog->flush();
+}
+
+/* Takes responsibility for mdr */
+void Server::do_open_truncate(MDRequestRef& mdr, int cmode)
+{
+ CInode *in = mdr->in[0];
+ client_t client = mdr->get_client();
+ assert(in);
+
+ dout(10) << "do_open_truncate " << *in << dendl;
+
+ SnapRealm *realm = in->find_snaprealm();
+ mds->locker->issue_new_caps(in, cmode, mdr->session, realm, mdr->client_request->is_replay());
+
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "open_truncate");
+ mdlog->start_entry(le);
+
+ // prepare
+ inode_t *pi = in->project_inode();
+ pi->version = in->pre_dirty();
+ pi->mtime = pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+
+ uint64_t old_size = MAX(pi->size, mdr->client_request->head.args.open.old_size);
+ if (old_size > 0) {
+ pi->truncate(old_size, 0);
+ le->metablob.add_truncate_start(in->ino());
+ }
+
+ bool changed_ranges = false;
+ if (cmode & CEPH_FILE_MODE_WR) {
+ pi->client_ranges[client].range.first = 0;
+ pi->client_ranges[client].range.last = pi->get_layout_size_increment();
+ pi->client_ranges[client].follows = in->find_snaprealm()->get_newest_seq();
+ changed_ranges = true;
+ }
+
+ le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid());
+
+ mdcache->predirty_journal_parents(mdr, &le->metablob, in, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, in);
+
+ // make sure ino gets into the journal
+ le->metablob.add_opened_ino(in->ino());
+ LogSegment *ls = mds->mdlog->get_current_segment();
+ ls->open_files.push_back(&in->item_open_file);
+
+ mdr->o_trunc = true;
+
+ CDentry *dn = 0;
+ if (mdr->client_request->get_dentry_wanted()) {
+ assert(mdr->dn[0].size());
+ dn = mdr->dn[0].back();
+ }
+
+ journal_and_reply(mdr, in, dn, le, new C_MDS_inode_update_finish(this, mdr, in, old_size > 0,
+ changed_ranges));
+ // Although the `open` part can give an early reply, the truncation won't
+ // happen until our EUpdate is persistent, to give the client a prompt
+ // response we must also flush that event.
+ mdlog->flush();
+}
+
+
+/* This function cleans up the passed mdr */
+void Server::handle_client_setlayout(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur) return;
+
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ if (!cur->is_file()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (cur->get_projected_inode()->size ||
+ cur->get_projected_inode()->truncate_seq > 1) {
+ respond_to_request(mdr, -ENOTEMPTY);
+ return;
+ }
+
+ // validate layout
+ file_layout_t layout = cur->get_projected_inode()->layout;
+ // save existing layout for later
+ const auto old_layout = layout;
+
+ int access = MAY_WRITE;
+
+ if (req->head.args.setlayout.layout.fl_object_size > 0)
+ layout.object_size = req->head.args.setlayout.layout.fl_object_size;
+ if (req->head.args.setlayout.layout.fl_stripe_unit > 0)
+ layout.stripe_unit = req->head.args.setlayout.layout.fl_stripe_unit;
+ if (req->head.args.setlayout.layout.fl_stripe_count > 0)
+ layout.stripe_count=req->head.args.setlayout.layout.fl_stripe_count;
+ if (req->head.args.setlayout.layout.fl_pg_pool > 0) {
+ layout.pool_id = req->head.args.setlayout.layout.fl_pg_pool;
+
+ // make sure we have as new a map as the client
+ if (req->get_mdsmap_epoch() > mds->mdsmap->get_epoch()) {
+ mds->wait_for_mdsmap(req->get_mdsmap_epoch(), new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ }
+
+ // Don't permit layout modifications without 'p' caps
+ if (layout != old_layout) {
+ access |= MAY_SET_VXATTR;
+ }
+
+ if (!layout.is_valid()) {
+ dout(10) << "bad layout" << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (!mds->mdsmap->is_data_pool(layout.pool_id)) {
+ dout(10) << " invalid data pool " << layout.pool_id << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ xlocks.insert(&cur->filelock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, cur, access))
+ return;
+
+ // project update
+ inode_t *pi = cur->project_inode();
+ pi->layout = layout;
+ // add the old pool to the inode
+ pi->add_old_pool(old_layout.pool_id);
+ pi->version = cur->pre_dirty();
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+
+ // log + wait
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "setlayout");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur));
+}
+
+void Server::handle_client_setdirlayout(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ file_layout_t *dir_layout = NULL;
+ CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true, false, &dir_layout);
+ if (!cur) return;
+
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ if (!cur->is_dir()) {
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+
+ xlocks.insert(&cur->policylock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ // validate layout
+ const inode_t *old_pi = cur->get_projected_inode();
+ file_layout_t layout;
+ if (old_pi->has_layout())
+ layout = old_pi->layout;
+ else if (dir_layout)
+ layout = *dir_layout;
+ else
+ layout = mdcache->default_file_layout;
+
+ // Level of access required to complete
+ int access = MAY_WRITE;
+
+ const auto old_layout = layout;
+
+ if (req->head.args.setlayout.layout.fl_object_size > 0)
+ layout.object_size = req->head.args.setlayout.layout.fl_object_size;
+ if (req->head.args.setlayout.layout.fl_stripe_unit > 0)
+ layout.stripe_unit = req->head.args.setlayout.layout.fl_stripe_unit;
+ if (req->head.args.setlayout.layout.fl_stripe_count > 0)
+ layout.stripe_count=req->head.args.setlayout.layout.fl_stripe_count;
+ if (req->head.args.setlayout.layout.fl_pg_pool > 0) {
+ layout.pool_id = req->head.args.setlayout.layout.fl_pg_pool;
+ // make sure we have as new a map as the client
+ if (req->get_mdsmap_epoch() > mds->mdsmap->get_epoch()) {
+ mds->wait_for_mdsmap(req->get_mdsmap_epoch(), new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ }
+
+ if (layout != old_layout) {
+ access |= MAY_SET_VXATTR;
+ }
+
+ if (!layout.is_valid()) {
+ dout(10) << "bad layout" << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (!mds->mdsmap->is_data_pool(layout.pool_id)) {
+ dout(10) << " invalid data pool " << layout.pool_id << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ if (!check_access(mdr, cur, access))
+ return;
+
+ inode_t *pi = cur->project_inode();
+ pi->layout = layout;
+ pi->version = cur->pre_dirty();
+
+ // log + wait
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "setlayout");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur));
+}
+
+// XATTRS
+
+int Server::parse_layout_vxattr(string name, string value, const OSDMap& osdmap,
+ file_layout_t *layout, bool validate)
+{
+ dout(20) << "parse_layout_vxattr name " << name << " value '" << value << "'" << dendl;
+ try {
+ if (name == "layout") {
+ string::iterator begin = value.begin();
+ string::iterator end = value.end();
+ keys_and_values<string::iterator> p; // create instance of parser
+ std::map<string, string> m; // map to receive results
+ if (!qi::parse(begin, end, p, m)) { // returns true if successful
+ return -EINVAL;
+ }
+ string left(begin, end);
+ dout(10) << " parsed " << m << " left '" << left << "'" << dendl;
+ if (begin != end)
+ return -EINVAL;
+ for (map<string,string>::iterator q = m.begin(); q != m.end(); ++q) {
+ // Skip validation on each attr, we do it once at the end (avoid
+ // rejecting intermediate states if the overall result is ok)
+ int r = parse_layout_vxattr(string("layout.") + q->first, q->second,
+ osdmap, layout, false);
+ if (r < 0)
+ return r;
+ }
+ } else if (name == "layout.object_size") {
+ layout->object_size = boost::lexical_cast<unsigned>(value);
+ } else if (name == "layout.stripe_unit") {
+ layout->stripe_unit = boost::lexical_cast<unsigned>(value);
+ } else if (name == "layout.stripe_count") {
+ layout->stripe_count = boost::lexical_cast<unsigned>(value);
+ } else if (name == "layout.pool") {
+ try {
+ layout->pool_id = boost::lexical_cast<unsigned>(value);
+ } catch (boost::bad_lexical_cast const&) {
+ int64_t pool = osdmap.lookup_pg_pool_name(value);
+ if (pool < 0) {
+ dout(10) << " unknown pool " << value << dendl;
+ return -ENOENT;
+ }
+ layout->pool_id = pool;
+ }
+ } else if (name == "layout.pool_namespace") {
+ layout->pool_ns = value;
+ } else {
+ dout(10) << " unknown layout vxattr " << name << dendl;
+ return -EINVAL;
+ }
+ } catch (boost::bad_lexical_cast const&) {
+ dout(10) << "bad vxattr value, unable to parse int for " << name << dendl;
+ return -EINVAL;
+ }
+
+ if (validate && !layout->is_valid()) {
+ dout(10) << "bad layout" << dendl;
+ return -EINVAL;
+ }
+ if (!mds->mdsmap->is_data_pool(layout->pool_id)) {
+ dout(10) << " invalid data pool " << layout->pool_id << dendl;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int Server::parse_quota_vxattr(string name, string value, quota_info_t *quota)
+{
+ dout(20) << "parse_quota_vxattr name " << name << " value '" << value << "'" << dendl;
+ try {
+ if (name == "quota") {
+ string::iterator begin = value.begin();
+ string::iterator end = value.end();
+ keys_and_values<string::iterator> p; // create instance of parser
+ std::map<string, string> m; // map to receive results
+ if (!qi::parse(begin, end, p, m)) { // returns true if successful
+ return -EINVAL;
+ }
+ string left(begin, end);
+ dout(10) << " parsed " << m << " left '" << left << "'" << dendl;
+ if (begin != end)
+ return -EINVAL;
+ for (map<string,string>::iterator q = m.begin(); q != m.end(); ++q) {
+ int r = parse_quota_vxattr(string("quota.") + q->first, q->second, quota);
+ if (r < 0)
+ return r;
+ }
+ } else if (name == "quota.max_bytes") {
+ int64_t q = boost::lexical_cast<int64_t>(value);
+ if (q < 0)
+ return -EINVAL;
+ quota->max_bytes = q;
+ } else if (name == "quota.max_files") {
+ int64_t q = boost::lexical_cast<int64_t>(value);
+ if (q < 0)
+ return -EINVAL;
+ quota->max_files = q;
+ } else {
+ dout(10) << " unknown quota vxattr " << name << dendl;
+ return -EINVAL;
+ }
+ } catch (boost::bad_lexical_cast const&) {
+ dout(10) << "bad vxattr value, unable to parse int for " << name << dendl;
+ return -EINVAL;
+ }
+
+ if (!quota->is_valid()) {
+ dout(10) << "bad quota" << dendl;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Verify that the file layout attribute carried by client
+ * is well-formatted.
+ * Return 0 on success, otherwise this function takes
+ * responsibility for the passed mdr.
+ */
+int Server::check_layout_vxattr(MDRequestRef& mdr,
+ string name,
+ string value,
+ file_layout_t *layout)
+{
+ MClientRequest *req = mdr->client_request;
+ epoch_t epoch;
+ int r;
+
+ mds->objecter->with_osdmap([&](const OSDMap& osdmap) {
+ r = parse_layout_vxattr(name, value, osdmap, layout);
+ epoch = osdmap.get_epoch();
+ });
+
+ if (r == -ENOENT) {
+
+ // we don't have the specified pool, make sure our map
+ // is newer than or as new as the client.
+ epoch_t req_epoch = req->get_osdmap_epoch();
+
+ if (req_epoch > epoch) {
+
+ // well, our map is older. consult mds.
+ Context *fin = new C_IO_Wrapper(mds, new C_MDS_RetryRequest(mdcache, mdr));
+
+ if (!mds->objecter->wait_for_map(req_epoch, fin))
+ return r; // wait, fin will retry this request later
+
+ delete fin;
+
+ // now we have at least as new a map as the client, try again.
+ mds->objecter->with_osdmap([&](const OSDMap& osdmap) {
+ r = parse_layout_vxattr(name, value, osdmap, layout);
+ epoch = osdmap.get_epoch();
+ });
+
+ assert(epoch >= req_epoch); // otherwise wait_for_map() told a lie
+
+ } else if (req_epoch == 0 && !mdr->waited_for_osdmap) {
+
+ // For compatibility with client w/ old code, we still need get the
+ // latest map. One day if COMPACT_VERSION of MClientRequest >=3,
+ // we can remove those code.
+ mdr->waited_for_osdmap = true;
+ mds->objecter->wait_for_latest_osdmap(new C_IO_Wrapper(
+ mds, new C_MDS_RetryRequest(mdcache, mdr)));
+ return r;
+ }
+ }
+
+ if (r < 0) {
+
+ if (r == -ENOENT)
+ r = -EINVAL;
+
+ respond_to_request(mdr, r);
+ return r;
+ }
+
+ // all is well
+ return 0;
+}
+
+void Server::handle_set_vxattr(MDRequestRef& mdr, CInode *cur,
+ file_layout_t *dir_layout,
+ set<SimpleLock*> rdlocks,
+ set<SimpleLock*> wrlocks,
+ set<SimpleLock*> xlocks)
+{
+ MClientRequest *req = mdr->client_request;
+ string name(req->get_path2());
+ bufferlist bl = req->get_data();
+ string value (bl.c_str(), bl.length());
+ dout(10) << "handle_set_vxattr " << name
+ << " val " << value.length()
+ << " bytes on " << *cur
+ << dendl;
+
+ inode_t *pi = NULL;
+ string rest;
+
+ if (!check_access(mdr, cur, MAY_SET_VXATTR)) {
+ return;
+ }
+
+ if (name.compare(0, 15, "ceph.dir.layout") == 0) {
+ if (!cur->is_dir()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ file_layout_t layout;
+ if (cur->get_projected_inode()->has_layout())
+ layout = cur->get_projected_inode()->layout;
+ else if (dir_layout)
+ layout = *dir_layout;
+ else
+ layout = mdcache->default_file_layout;
+
+ rest = name.substr(name.find("layout"));
+ if (check_layout_vxattr(mdr, rest, value, &layout) < 0)
+ return;
+
+ xlocks.insert(&cur->policylock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ pi = cur->project_inode();
+ pi->layout = layout;
+ } else if (name.compare(0, 16, "ceph.file.layout") == 0) {
+ if (!cur->is_file()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (cur->get_projected_inode()->size ||
+ cur->get_projected_inode()->truncate_seq > 1) {
+ respond_to_request(mdr, -ENOTEMPTY);
+ return;
+ }
+ file_layout_t layout = cur->get_projected_inode()->layout;
+ rest = name.substr(name.find("layout"));
+ if (check_layout_vxattr(mdr, rest, value, &layout) < 0)
+ return;
+
+ xlocks.insert(&cur->filelock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ pi = cur->project_inode();
+ int64_t old_pool = pi->layout.pool_id;
+ pi->add_old_pool(old_pool);
+ pi->layout = layout;
+ pi->ctime = mdr->get_op_stamp();
+ } else if (name.compare(0, 10, "ceph.quota") == 0) {
+ if (!cur->is_dir() || cur->is_root()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ quota_info_t quota = cur->get_projected_inode()->quota;
+
+ rest = name.substr(name.find("quota"));
+ int r = parse_quota_vxattr(rest, value, "a);
+ if (r < 0) {
+ respond_to_request(mdr, r);
+ return;
+ }
+
+ xlocks.insert(&cur->policylock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ pi = cur->project_inode();
+ pi->quota = quota;
+ } else if (name.find("ceph.dir.pin") == 0) {
+ if (!cur->is_dir() || cur->is_root()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ mds_rank_t rank;
+ try {
+ rank = boost::lexical_cast<mds_rank_t>(value);
+ if (rank < 0) rank = MDS_RANK_NONE;
+ } catch (boost::bad_lexical_cast const&) {
+ dout(10) << "bad vxattr value, unable to parse int for " << name << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ xlocks.insert(&cur->policylock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ pi = cur->project_inode();
+ cur->set_export_pin(rank);
+ } else {
+ dout(10) << " unknown vxattr " << name << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ pi->change_attr++;
+ pi->ctime = mdr->get_op_stamp();
+ pi->version = cur->pre_dirty();
+ if (cur->is_file())
+ pi->update_backtrace();
+
+ // log + wait
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "set vxattr layout");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur));
+ return;
+}
+
+void Server::handle_remove_vxattr(MDRequestRef& mdr, CInode *cur,
+ file_layout_t *dir_layout,
+ set<SimpleLock*> rdlocks,
+ set<SimpleLock*> wrlocks,
+ set<SimpleLock*> xlocks)
+{
+ MClientRequest *req = mdr->client_request;
+ string name(req->get_path2());
+
+ dout(10) << __func__ << " " << name << " on " << *cur << dendl;
+
+ if (name == "ceph.dir.layout") {
+ if (!cur->is_dir()) {
+ respond_to_request(mdr, -ENODATA);
+ return;
+ }
+ if (cur->is_root()) {
+ dout(10) << "can't remove layout policy on the root directory" << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ if (!cur->get_projected_inode()->has_layout()) {
+ respond_to_request(mdr, -ENODATA);
+ return;
+ }
+
+ xlocks.insert(&cur->policylock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ inode_t *pi = cur->project_inode();
+ pi->clear_layout();
+ pi->version = cur->pre_dirty();
+
+ // log + wait
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "remove dir layout vxattr");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur));
+ return;
+ } else if (name == "ceph.dir.layout.pool_namespace"
+ || name == "ceph.file.layout.pool_namespace") {
+ // Namespace is the only layout field that has a meaningful
+ // null/none value (empty string, means default layout). Is equivalent
+ // to a setxattr with empty string: pass through the empty payload of
+ // the rmxattr request to do this.
+ handle_set_vxattr(mdr, cur, dir_layout, rdlocks, wrlocks, xlocks);
+ return;
+ }
+
+ respond_to_request(mdr, -ENODATA);
+}
+
+class C_MDS_inode_xattr_update_finish : public ServerLogContext {
+ CInode *in;
+public:
+
+ C_MDS_inode_xattr_update_finish(Server *s, MDRequestRef& r, CInode *i) :
+ ServerLogContext(s, r), in(i) { }
+ void finish(int r) override {
+ assert(r == 0);
+
+ // apply
+ in->pop_and_dirty_projected_inode(mdr->ls);
+
+ mdr->apply();
+
+ get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), in, META_POP_IWR);
+
+ server->respond_to_request(mdr, 0);
+ }
+};
+
+void Server::handle_client_setxattr(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ string name(req->get_path2());
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CInode *cur;
+
+ file_layout_t *dir_layout = NULL;
+ if (name.compare(0, 15, "ceph.dir.layout") == 0)
+ cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true, false, &dir_layout);
+ else
+ cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur)
+ return;
+
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ int flags = req->head.args.setxattr.flags;
+
+ // magic ceph.* namespace?
+ if (name.compare(0, 5, "ceph.") == 0) {
+ handle_set_vxattr(mdr, cur, dir_layout, rdlocks, wrlocks, xlocks);
+ return;
+ }
+
+ xlocks.insert(&cur->xattrlock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, cur, MAY_WRITE))
+ return;
+
+ map<string, bufferptr> *pxattrs = cur->get_projected_xattrs();
+ size_t len = req->get_data().length();
+ size_t inc = len + name.length();
+
+ // check xattrs kv pairs size
+ size_t cur_xattrs_size = 0;
+ for (const auto& p : *pxattrs) {
+ if ((flags & CEPH_XATTR_REPLACE) && (name.compare(p.first) == 0)) {
+ continue;
+ }
+ cur_xattrs_size += p.first.length() + p.second.length();
+ }
+
+ if (((cur_xattrs_size + inc) > g_conf->mds_max_xattr_pairs_size)) {
+ dout(10) << "xattr kv pairs size too big. cur_xattrs_size "
+ << cur_xattrs_size << ", inc " << inc << dendl;
+ respond_to_request(mdr, -ENOSPC);
+ return;
+ }
+
+ if ((flags & CEPH_XATTR_CREATE) && pxattrs->count(name)) {
+ dout(10) << "setxattr '" << name << "' XATTR_CREATE and EEXIST on " << *cur << dendl;
+ respond_to_request(mdr, -EEXIST);
+ return;
+ }
+ if ((flags & CEPH_XATTR_REPLACE) && !pxattrs->count(name)) {
+ dout(10) << "setxattr '" << name << "' XATTR_REPLACE and ENODATA on " << *cur << dendl;
+ respond_to_request(mdr, -ENODATA);
+ return;
+ }
+
+ dout(10) << "setxattr '" << name << "' len " << len << " on " << *cur << dendl;
+
+ // project update
+ map<string,bufferptr> *px = new map<string,bufferptr>;
+ inode_t *pi = cur->project_inode(px);
+ pi->version = cur->pre_dirty();
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+ pi->xattr_version++;
+ px->erase(name);
+ if (!(flags & CEPH_XATTR_REMOVE)) {
+ (*px)[name] = buffer::create(len);
+ if (len)
+ req->get_data().copy(0, len, (*px)[name].c_str());
+ }
+
+ // log + wait
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "setxattr");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur));
+}
+
+void Server::handle_client_removexattr(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ string name(req->get_path2());
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ file_layout_t *dir_layout = NULL;
+ CInode *cur;
+ if (name == "ceph.dir.layout")
+ cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true, false, &dir_layout);
+ else
+ cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true);
+ if (!cur)
+ return;
+
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ if (name.compare(0, 5, "ceph.") == 0) {
+ handle_remove_vxattr(mdr, cur, dir_layout, rdlocks, wrlocks, xlocks);
+ return;
+ }
+
+ xlocks.insert(&cur->xattrlock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ map<string, bufferptr> *pxattrs = cur->get_projected_xattrs();
+ if (pxattrs->count(name) == 0) {
+ dout(10) << "removexattr '" << name << "' and ENODATA on " << *cur << dendl;
+ respond_to_request(mdr, -ENODATA);
+ return;
+ }
+
+ dout(10) << "removexattr '" << name << "' on " << *cur << dendl;
+
+ // project update
+ map<string,bufferptr> *px = new map<string,bufferptr>;
+ inode_t *pi = cur->project_inode(px);
+ pi->version = cur->pre_dirty();
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+ pi->xattr_version++;
+ px->erase(name);
+
+ // log + wait
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "removexattr");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur);
+
+ journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur));
+}
+
+
+// =================================================================
+// DIRECTORY and NAMESPACE OPS
+
+
+// ------------------------------------------------
+
+// MKNOD
+
+class C_MDS_mknod_finish : public ServerLogContext {
+ CDentry *dn;
+ CInode *newi;
+public:
+ C_MDS_mknod_finish(Server *s, MDRequestRef& r, CDentry *d, CInode *ni) :
+ ServerLogContext(s, r), dn(d), newi(ni) {}
+ void finish(int r) override {
+ assert(r == 0);
+
+ // link the inode
+ dn->pop_projected_linkage();
+
+ // be a bit hacky with the inode version, here.. we decrement it
+ // just to keep mark_dirty() happen. (we didn't bother projecting
+ // a new version of hte inode since it's just been created)
+ newi->inode.version--;
+ newi->mark_dirty(newi->inode.version + 1, mdr->ls);
+ newi->_mark_dirty_parent(mdr->ls, true);
+
+ // mkdir?
+ if (newi->inode.is_dir()) {
+ CDir *dir = newi->get_dirfrag(frag_t());
+ assert(dir);
+ dir->fnode.version--;
+ dir->mark_dirty(dir->fnode.version + 1, mdr->ls);
+ dir->mark_new(mdr->ls);
+ }
+
+ mdr->apply();
+
+ MDRequestRef null_ref;
+ get_mds()->mdcache->send_dentry_link(dn, null_ref);
+
+ if (newi->inode.is_file())
+ get_mds()->locker->share_inode_max_size(newi);
+
+ // hit pop
+ get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), newi, META_POP_IWR);
+
+ // reply
+ server->respond_to_request(mdr, 0);
+ }
+};
+
+
+void Server::handle_client_mknod(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ client_t client = mdr->get_client();
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ file_layout_t *dir_layout = NULL;
+ CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false,
+ &dir_layout);
+ if (!dn) return;
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ CInode *diri = dn->get_dir()->get_inode();
+ rdlocks.insert(&diri->authlock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+
+ if (!check_fragment_space(mdr, dn->get_dir()))
+ return;
+
+ unsigned mode = req->head.args.mknod.mode;
+ if ((mode & S_IFMT) == 0)
+ mode |= S_IFREG;
+
+ // set layout
+ file_layout_t layout;
+ if (dir_layout && S_ISREG(mode))
+ layout = *dir_layout;
+ else
+ layout = mdcache->default_file_layout;
+
+ SnapRealm *realm = dn->get_dir()->inode->find_snaprealm();
+ snapid_t follows = realm->get_newest_seq();
+ CInode *newi = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino),
+ mode, &layout);
+ assert(newi);
+
+ dn->push_projected_linkage(newi);
+
+ newi->inode.rdev = req->head.args.mknod.rdev;
+ newi->inode.version = dn->pre_dirty();
+ newi->inode.rstat.rfiles = 1;
+ if (layout.pool_id != mdcache->default_file_layout.pool_id)
+ newi->inode.add_old_pool(mdcache->default_file_layout.pool_id);
+ newi->inode.update_backtrace();
+
+ // if the client created a _regular_ file via MKNOD, it's highly likely they'll
+ // want to write to it (e.g., if they are reexporting NFS)
+ if (S_ISREG(newi->inode.mode)) {
+ dout(15) << " setting a client_range too, since this is a regular file" << dendl;
+ newi->inode.client_ranges[client].range.first = 0;
+ newi->inode.client_ranges[client].range.last = newi->inode.get_layout_size_increment();
+ newi->inode.client_ranges[client].follows = follows;
+
+ // issue a cap on the file
+ int cmode = CEPH_FILE_MODE_RDWR;
+ Capability *cap = mds->locker->issue_new_caps(newi, cmode, mdr->session, realm, req->is_replay());
+ if (cap) {
+ cap->set_wanted(0);
+
+ // put locks in excl mode
+ newi->filelock.set_state(LOCK_EXCL);
+ newi->authlock.set_state(LOCK_EXCL);
+ newi->xattrlock.set_state(LOCK_EXCL);
+ }
+ }
+
+ assert(dn->first == follows + 1);
+ newi->first = dn->first;
+
+ dout(10) << "mknod mode " << newi->inode.mode << " rdev " << newi->inode.rdev << dendl;
+
+ // prepare finisher
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "mknod");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ journal_allocated_inos(mdr, &le->metablob);
+
+ mdcache->predirty_journal_parents(mdr, &le->metablob, newi, dn->get_dir(),
+ PREDIRTY_PRIMARY|PREDIRTY_DIR, 1);
+ le->metablob.add_primary_dentry(dn, newi, true, true, true);
+
+ journal_and_reply(mdr, newi, dn, le, new C_MDS_mknod_finish(this, mdr, dn, newi));
+}
+
+
+
+// MKDIR
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_mkdir(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false);
+ if (!dn) return;
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ CDir *dir = dn->get_dir();
+ CInode *diri = dir->get_inode();
+ rdlocks.insert(&diri->authlock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ // mkdir check access
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+
+ if (!check_fragment_space(mdr, dir))
+ return;
+
+ // new inode
+ SnapRealm *realm = dn->get_dir()->inode->find_snaprealm();
+ snapid_t follows = realm->get_newest_seq();
+
+ unsigned mode = req->head.args.mkdir.mode;
+ mode &= ~S_IFMT;
+ mode |= S_IFDIR;
+ CInode *newi = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino), mode);
+ assert(newi);
+
+ // it's a directory.
+ dn->push_projected_linkage(newi);
+
+ newi->inode.version = dn->pre_dirty();
+ newi->inode.rstat.rsubdirs = 1;
+ newi->inode.update_backtrace();
+
+ dout(12) << " follows " << follows << dendl;
+ assert(dn->first == follows + 1);
+ newi->first = dn->first;
+
+ // ...and that new dir is empty.
+ CDir *newdir = newi->get_or_open_dirfrag(mdcache, frag_t());
+ newdir->state_set(CDir::STATE_CREATING);
+ newdir->mark_complete();
+ newdir->fnode.version = newdir->pre_dirty();
+
+ // prepare finisher
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "mkdir");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ journal_allocated_inos(mdr, &le->metablob);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, newi, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1);
+ le->metablob.add_primary_dentry(dn, newi, true, true);
+ le->metablob.add_new_dir(newdir); // dirty AND complete AND new
+
+ // issue a cap on the directory
+ int cmode = CEPH_FILE_MODE_RDWR;
+ Capability *cap = mds->locker->issue_new_caps(newi, cmode, mdr->session, realm, req->is_replay());
+ if (cap) {
+ cap->set_wanted(0);
+
+ // put locks in excl mode
+ newi->filelock.set_state(LOCK_EXCL);
+ newi->authlock.set_state(LOCK_EXCL);
+ newi->xattrlock.set_state(LOCK_EXCL);
+ }
+
+ // make sure this inode gets into the journal
+ le->metablob.add_opened_ino(newi->ino());
+ LogSegment *ls = mds->mdlog->get_current_segment();
+ ls->open_files.push_back(&newi->item_open_file);
+
+ journal_and_reply(mdr, newi, dn, le, new C_MDS_mknod_finish(this, mdr, dn, newi));
+}
+
+
+// SYMLINK
+
+void Server::handle_client_symlink(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false);
+ if (!dn) return;
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ CDir *dir = dn->get_dir();
+ CInode *diri = dir->get_inode();
+ rdlocks.insert(&diri->authlock);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+
+ if (!check_fragment_space(mdr, dir))
+ return;
+
+ unsigned mode = S_IFLNK | 0777;
+ CInode *newi = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino), mode);
+ assert(newi);
+
+ // it's a symlink
+ dn->push_projected_linkage(newi);
+
+ newi->symlink = req->get_path2();
+ newi->inode.size = newi->symlink.length();
+ newi->inode.rstat.rbytes = newi->inode.size;
+ newi->inode.rstat.rfiles = 1;
+ newi->inode.version = dn->pre_dirty();
+ newi->inode.update_backtrace();
+
+ newi->first = dn->first;
+
+ // prepare finisher
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "symlink");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ journal_allocated_inos(mdr, &le->metablob);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, newi, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1);
+ le->metablob.add_primary_dentry(dn, newi, true, true);
+
+ journal_and_reply(mdr, newi, dn, le, new C_MDS_mknod_finish(this, mdr, dn, newi));
+}
+
+
+
+
+
+// LINK
+
+void Server::handle_client_link(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+
+ dout(7) << "handle_client_link " << req->get_filepath()
+ << " to " << req->get_filepath2()
+ << dendl;
+
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false);
+ if (!dn) return;
+ CInode *targeti = rdlock_path_pin_ref(mdr, 1, rdlocks, false);
+ if (!targeti) return;
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ CDir *dir = dn->get_dir();
+ dout(7) << "handle_client_link link " << dn->get_name() << " in " << *dir << dendl;
+ dout(7) << "target is " << *targeti << dendl;
+ if (targeti->is_dir()) {
+ // if srcdn is replica, need to make sure its linkage is correct
+ vector<CDentry*>& trace = mdr->dn[1];
+ if (trace.empty() ||
+ trace.back()->is_auth() ||
+ trace.back()->lock.can_read(mdr->get_client())) {
+ dout(7) << "target is a dir, failing..." << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ }
+
+ xlocks.insert(&targeti->linklock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if ((!mdr->has_more() || mdr->more()->witnessed.empty())) {
+ if (!check_access(mdr, targeti, MAY_WRITE))
+ return;
+
+ if (!check_access(mdr, dir->get_inode(), MAY_WRITE))
+ return;
+
+ if (!check_fragment_space(mdr, dir))
+ return;
+ }
+
+ // go!
+ assert(g_conf->mds_kill_link_at != 1);
+
+ // local or remote?
+ if (targeti->is_auth())
+ _link_local(mdr, dn, targeti);
+ else
+ _link_remote(mdr, true, dn, targeti);
+}
+
+
+class C_MDS_link_local_finish : public ServerLogContext {
+ CDentry *dn;
+ CInode *targeti;
+ version_t dnpv;
+ version_t tipv;
+public:
+ C_MDS_link_local_finish(Server *s, MDRequestRef& r, CDentry *d, CInode *ti,
+ version_t dnpv_, version_t tipv_) :
+ ServerLogContext(s, r), dn(d), targeti(ti),
+ dnpv(dnpv_), tipv(tipv_) { }
+ void finish(int r) override {
+ assert(r == 0);
+ server->_link_local_finish(mdr, dn, targeti, dnpv, tipv);
+ }
+};
+
+
+void Server::_link_local(MDRequestRef& mdr, CDentry *dn, CInode *targeti)
+{
+ dout(10) << "_link_local " << *dn << " to " << *targeti << dendl;
+
+ mdr->ls = mdlog->get_current_segment();
+
+ // predirty NEW dentry
+ version_t dnpv = dn->pre_dirty();
+ version_t tipv = targeti->pre_dirty();
+
+ // project inode update
+ inode_t *pi = targeti->project_inode();
+ pi->nlink++;
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+ pi->version = tipv;
+
+ // log + wait
+ EUpdate *le = new EUpdate(mdlog, "link_local");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid());
+ mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, dn->get_dir(), PREDIRTY_DIR, 1); // new dn
+ mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, 0, PREDIRTY_PRIMARY); // targeti
+ le->metablob.add_remote_dentry(dn, true, targeti->ino(), targeti->d_type()); // new remote
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, targeti);
+
+ // do this after predirty_*, to avoid funky extra dnl arg
+ dn->push_projected_linkage(targeti->ino(), targeti->d_type());
+
+ journal_and_reply(mdr, targeti, dn, le, new C_MDS_link_local_finish(this, mdr, dn, targeti, dnpv, tipv));
+}
+
+void Server::_link_local_finish(MDRequestRef& mdr, CDentry *dn, CInode *targeti,
+ version_t dnpv, version_t tipv)
+{
+ dout(10) << "_link_local_finish " << *dn << " to " << *targeti << dendl;
+
+ // link and unlock the NEW dentry
+ CDentry::linkage_t *dnl = dn->pop_projected_linkage();
+ if (!dnl->get_inode())
+ dn->link_remote(dnl, targeti);
+ dn->mark_dirty(dnpv, mdr->ls);
+
+ // target inode
+ targeti->pop_and_dirty_projected_inode(mdr->ls);
+
+ mdr->apply();
+
+ MDRequestRef null_ref;
+ mdcache->send_dentry_link(dn, null_ref);
+
+ // bump target popularity
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), targeti, META_POP_IWR);
+ mds->balancer->hit_dir(mdr->get_mds_stamp(), dn->get_dir(), META_POP_IWR);
+
+ // reply
+ respond_to_request(mdr, 0);
+}
+
+
+// link / unlink remote
+
+class C_MDS_link_remote_finish : public ServerLogContext {
+ bool inc;
+ CDentry *dn;
+ CInode *targeti;
+ version_t dpv;
+public:
+ C_MDS_link_remote_finish(Server *s, MDRequestRef& r, bool i, CDentry *d, CInode *ti) :
+ ServerLogContext(s, r), inc(i), dn(d), targeti(ti),
+ dpv(d->get_projected_version()) {}
+ void finish(int r) override {
+ assert(r == 0);
+ server->_link_remote_finish(mdr, inc, dn, targeti, dpv);
+ }
+};
+
+void Server::_link_remote(MDRequestRef& mdr, bool inc, CDentry *dn, CInode *targeti)
+{
+ dout(10) << "_link_remote "
+ << (inc ? "link ":"unlink ")
+ << *dn << " to " << *targeti << dendl;
+
+ // 1. send LinkPrepare to dest (journal nlink++ prepare)
+ mds_rank_t linkauth = targeti->authority().first;
+ if (mdr->more()->witnessed.count(linkauth) == 0) {
+ if (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(linkauth)) {
+ dout(10) << " targeti auth mds." << linkauth << " is not active" << dendl;
+ if (mdr->more()->waiting_on_slave.empty())
+ mds->wait_for_active_peer(linkauth, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+
+ dout(10) << " targeti auth must prepare nlink++/--" << dendl;
+ int op;
+ if (inc)
+ op = MMDSSlaveRequest::OP_LINKPREP;
+ else
+ op = MMDSSlaveRequest::OP_UNLINKPREP;
+ MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, op);
+ targeti->set_object_info(req->get_object_info());
+ req->op_stamp = mdr->get_op_stamp();
+ mds->send_message_mds(req, linkauth);
+
+ assert(mdr->more()->waiting_on_slave.count(linkauth) == 0);
+ mdr->more()->waiting_on_slave.insert(linkauth);
+ return;
+ }
+ dout(10) << " targeti auth has prepared nlink++/--" << dendl;
+
+ assert(g_conf->mds_kill_link_at != 2);
+
+ mdr->set_mds_stamp(ceph_clock_now());
+
+ // add to event
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, inc ? "link_remote":"unlink_remote");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid());
+ if (!mdr->more()->witnessed.empty()) {
+ dout(20) << " noting uncommitted_slaves " << mdr->more()->witnessed << dendl;
+ le->reqid = mdr->reqid;
+ le->had_slaves = true;
+ mdcache->add_uncommitted_master(mdr->reqid, mdr->ls, mdr->more()->witnessed);
+ }
+
+ if (inc) {
+ dn->pre_dirty();
+ mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, dn->get_dir(), PREDIRTY_DIR, 1);
+ le->metablob.add_remote_dentry(dn, true, targeti->ino(), targeti->d_type()); // new remote
+ dn->push_projected_linkage(targeti->ino(), targeti->d_type());
+ } else {
+ dn->pre_dirty();
+ mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, dn->get_dir(), PREDIRTY_DIR, -1);
+ mdcache->journal_cow_dentry(mdr.get(), &le->metablob, dn);
+ le->metablob.add_null_dentry(dn, true);
+ dn->push_projected_linkage();
+ }
+
+ journal_and_reply(mdr, targeti, dn, le, new C_MDS_link_remote_finish(this, mdr, inc, dn, targeti));
+}
+
+void Server::_link_remote_finish(MDRequestRef& mdr, bool inc,
+ CDentry *dn, CInode *targeti,
+ version_t dpv)
+{
+ dout(10) << "_link_remote_finish "
+ << (inc ? "link ":"unlink ")
+ << *dn << " to " << *targeti << dendl;
+
+ assert(g_conf->mds_kill_link_at != 3);
+
+ if (!mdr->more()->witnessed.empty())
+ mdcache->logged_master_update(mdr->reqid);
+
+ if (inc) {
+ // link the new dentry
+ CDentry::linkage_t *dnl = dn->pop_projected_linkage();
+ if (!dnl->get_inode())
+ dn->link_remote(dnl, targeti);
+ dn->mark_dirty(dpv, mdr->ls);
+ } else {
+ // unlink main dentry
+ dn->get_dir()->unlink_inode(dn);
+ dn->pop_projected_linkage();
+ dn->mark_dirty(dn->get_projected_version(), mdr->ls); // dirty old dentry
+ }
+
+ mdr->apply();
+
+ MDRequestRef null_ref;
+ if (inc)
+ mdcache->send_dentry_link(dn, null_ref);
+ else
+ mdcache->send_dentry_unlink(dn, NULL, null_ref);
+
+ // bump target popularity
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), targeti, META_POP_IWR);
+ mds->balancer->hit_dir(mdr->get_mds_stamp(), dn->get_dir(), META_POP_IWR);
+
+ // reply
+ respond_to_request(mdr, 0);
+
+ if (!inc)
+ // removing a new dn?
+ dn->get_dir()->try_remove_unlinked_dn(dn);
+}
+
+
+// remote linking/unlinking
+
+class C_MDS_SlaveLinkPrep : public ServerLogContext {
+ CInode *targeti;
+public:
+ C_MDS_SlaveLinkPrep(Server *s, MDRequestRef& r, CInode *t) :
+ ServerLogContext(s, r), targeti(t) { }
+ void finish(int r) override {
+ assert(r == 0);
+ server->_logged_slave_link(mdr, targeti);
+ }
+};
+
+class C_MDS_SlaveLinkCommit : public ServerContext {
+ MDRequestRef mdr;
+ CInode *targeti;
+public:
+ C_MDS_SlaveLinkCommit(Server *s, MDRequestRef& r, CInode *t) :
+ ServerContext(s), mdr(r), targeti(t) { }
+ void finish(int r) override {
+ server->_commit_slave_link(mdr, r, targeti);
+ }
+};
+
+/* This function DOES put the mdr->slave_request before returning*/
+void Server::handle_slave_link_prep(MDRequestRef& mdr)
+{
+ dout(10) << "handle_slave_link_prep " << *mdr
+ << " on " << mdr->slave_request->get_object_info()
+ << dendl;
+
+ assert(g_conf->mds_kill_link_at != 4);
+
+ CInode *targeti = mdcache->get_inode(mdr->slave_request->get_object_info().ino);
+ assert(targeti);
+ dout(10) << "targeti " << *targeti << dendl;
+ CDentry *dn = targeti->get_parent_dn();
+ CDentry::linkage_t *dnl = dn->get_linkage();
+ assert(dnl->is_primary());
+
+ mdr->set_op_stamp(mdr->slave_request->op_stamp);
+
+ mdr->auth_pin(targeti);
+
+ //ceph_abort(); // test hack: make sure master can handle a slave that fails to prepare...
+ assert(g_conf->mds_kill_link_at != 5);
+
+ // journal it
+ mdr->ls = mdlog->get_current_segment();
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_link_prep", mdr->reqid, mdr->slave_to_mds,
+ ESlaveUpdate::OP_PREPARE, ESlaveUpdate::LINK);
+ mdlog->start_entry(le);
+
+ inode_t *pi = dnl->get_inode()->project_inode();
+
+ // update journaled target inode
+ bool inc;
+ if (mdr->slave_request->get_op() == MMDSSlaveRequest::OP_LINKPREP) {
+ inc = true;
+ pi->nlink++;
+ } else {
+ inc = false;
+ pi->nlink--;
+ }
+
+ link_rollback rollback;
+ rollback.reqid = mdr->reqid;
+ rollback.ino = targeti->ino();
+ rollback.old_ctime = targeti->inode.ctime; // we hold versionlock xlock; no concorrent projections
+ const fnode_t *pf = targeti->get_parent_dn()->get_dir()->get_projected_fnode();
+ rollback.old_dir_mtime = pf->fragstat.mtime;
+ rollback.old_dir_rctime = pf->rstat.rctime;
+ rollback.was_inc = inc;
+ ::encode(rollback, le->rollback);
+ mdr->more()->rollback_bl = le->rollback;
+
+ pi->ctime = mdr->get_op_stamp();
+ pi->version = targeti->pre_dirty();
+
+ dout(10) << " projected inode " << pi << " v " << pi->version << dendl;
+
+ // commit case
+ mdcache->predirty_journal_parents(mdr, &le->commit, dnl->get_inode(), 0, PREDIRTY_SHALLOW|PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->commit, targeti);
+
+ // set up commit waiter
+ mdr->more()->slave_commit = new C_MDS_SlaveLinkCommit(this, mdr, targeti);
+
+ mdr->more()->slave_update_journaled = true;
+ submit_mdlog_entry(le, new C_MDS_SlaveLinkPrep(this, mdr, targeti),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_logged_slave_link(MDRequestRef& mdr, CInode *targeti)
+{
+ dout(10) << "_logged_slave_link " << *mdr
+ << " " << *targeti << dendl;
+
+ assert(g_conf->mds_kill_link_at != 6);
+
+ // update the target
+ targeti->pop_and_dirty_projected_inode(mdr->ls);
+ mdr->apply();
+
+ // hit pop
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), targeti, META_POP_IWR);
+
+ // done.
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+
+ // ack
+ if (!mdr->aborted) {
+ MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_LINKPREPACK);
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+ } else {
+ dout(10) << " abort flag set, finishing" << dendl;
+ mdcache->request_finish(mdr);
+ }
+}
+
+
+struct C_MDS_CommittedSlave : public ServerLogContext {
+ C_MDS_CommittedSlave(Server *s, MDRequestRef& m) : ServerLogContext(s, m) {}
+ void finish(int r) override {
+ server->_committed_slave(mdr);
+ }
+};
+
+void Server::_commit_slave_link(MDRequestRef& mdr, int r, CInode *targeti)
+{
+ dout(10) << "_commit_slave_link " << *mdr
+ << " r=" << r
+ << " " << *targeti << dendl;
+
+ assert(g_conf->mds_kill_link_at != 7);
+
+ if (r == 0) {
+ // drop our pins, etc.
+ mdr->cleanup();
+
+ // write a commit to the journal
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_link_commit", mdr->reqid, mdr->slave_to_mds,
+ ESlaveUpdate::OP_COMMIT, ESlaveUpdate::LINK);
+ mdlog->start_entry(le);
+ submit_mdlog_entry(le, new C_MDS_CommittedSlave(this, mdr), mdr, __func__);
+ mdlog->flush();
+ } else {
+ do_link_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr);
+ }
+}
+
+void Server::_committed_slave(MDRequestRef& mdr)
+{
+ dout(10) << "_committed_slave " << *mdr << dendl;
+
+ assert(g_conf->mds_kill_link_at != 8);
+
+ MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_COMMITTED);
+ mds->send_message_mds(req, mdr->slave_to_mds);
+ mdcache->request_finish(mdr);
+}
+
+struct C_MDS_LoggedLinkRollback : public ServerLogContext {
+ MutationRef mut;
+ C_MDS_LoggedLinkRollback(Server *s, MutationRef& m, MDRequestRef& r) : ServerLogContext(s, r), mut(m) {}
+ void finish(int r) override {
+ server->_link_rollback_finish(mut, mdr);
+ }
+};
+
+void Server::do_link_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr)
+{
+ link_rollback rollback;
+ bufferlist::iterator p = rbl.begin();
+ ::decode(rollback, p);
+
+ dout(10) << "do_link_rollback on " << rollback.reqid
+ << (rollback.was_inc ? " inc":" dec")
+ << " ino " << rollback.ino
+ << dendl;
+
+ assert(g_conf->mds_kill_link_at != 9);
+
+ mdcache->add_rollback(rollback.reqid, master); // need to finish this update before resolve finishes
+ assert(mdr || mds->is_resolve());
+
+ MutationRef mut(new MutationImpl(nullptr, utime_t(), rollback.reqid));
+ mut->ls = mds->mdlog->get_current_segment();
+
+ CInode *in = mdcache->get_inode(rollback.ino);
+ assert(in);
+ dout(10) << " target is " << *in << dendl;
+ assert(!in->is_projected()); // live slave request hold versionlock xlock.
+
+ inode_t *pi = in->project_inode();
+ pi->version = in->pre_dirty();
+ mut->add_projected_inode(in);
+
+ // parent dir rctime
+ CDir *parent = in->get_projected_parent_dn()->get_dir();
+ fnode_t *pf = parent->project_fnode();
+ mut->add_projected_fnode(parent);
+ pf->version = parent->pre_dirty();
+ if (pf->fragstat.mtime == pi->ctime) {
+ pf->fragstat.mtime = rollback.old_dir_mtime;
+ if (pf->rstat.rctime == pi->ctime)
+ pf->rstat.rctime = rollback.old_dir_rctime;
+ mut->add_updated_lock(&parent->get_inode()->filelock);
+ mut->add_updated_lock(&parent->get_inode()->nestlock);
+ }
+
+ // inode
+ pi->ctime = rollback.old_ctime;
+ if (rollback.was_inc)
+ pi->nlink--;
+ else
+ pi->nlink++;
+
+ // journal it
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_link_rollback", rollback.reqid, master,
+ ESlaveUpdate::OP_ROLLBACK, ESlaveUpdate::LINK);
+ mdlog->start_entry(le);
+ le->commit.add_dir_context(parent);
+ le->commit.add_dir(parent, true);
+ le->commit.add_primary_dentry(in->get_projected_parent_dn(), 0, true);
+
+ submit_mdlog_entry(le, new C_MDS_LoggedLinkRollback(this, mut, mdr),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_link_rollback_finish(MutationRef& mut, MDRequestRef& mdr)
+{
+ dout(10) << "_link_rollback_finish" << dendl;
+
+ assert(g_conf->mds_kill_link_at != 10);
+
+ mut->apply();
+ if (mdr)
+ mdcache->request_finish(mdr);
+
+ mdcache->finish_rollback(mut->reqid);
+
+ mut->cleanup();
+}
+
+
+/* This function DOES NOT put the passed message before returning*/
+void Server::handle_slave_link_prep_ack(MDRequestRef& mdr, MMDSSlaveRequest *m)
+{
+ dout(10) << "handle_slave_link_prep_ack " << *mdr
+ << " " << *m << dendl;
+ mds_rank_t from = mds_rank_t(m->get_source().num());
+
+ assert(g_conf->mds_kill_link_at != 11);
+
+ // note slave
+ mdr->more()->slaves.insert(from);
+
+ // witnessed!
+ assert(mdr->more()->witnessed.count(from) == 0);
+ mdr->more()->witnessed.insert(from);
+ assert(!m->is_not_journaled());
+ mdr->more()->has_journaled_slaves = true;
+
+ // remove from waiting list
+ assert(mdr->more()->waiting_on_slave.count(from));
+ mdr->more()->waiting_on_slave.erase(from);
+
+ assert(mdr->more()->waiting_on_slave.empty());
+
+ dispatch_client_request(mdr); // go again!
+}
+
+
+
+
+
+// UNLINK
+
+void Server::handle_client_unlink(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ client_t client = mdr->get_client();
+
+ // rmdir or unlink?
+ bool rmdir = false;
+ if (req->get_op() == CEPH_MDS_OP_RMDIR) rmdir = true;
+
+ if (req->get_filepath().depth() == 0) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ // traverse to path
+ vector<CDentry*> trace;
+ CInode *in;
+ int r = mdcache->path_traverse(mdr, NULL, NULL, req->get_filepath(), &trace, &in, MDS_TRAVERSE_FORWARD);
+ if (r > 0) return;
+ if (r < 0) {
+ if (r == -ESTALE) {
+ dout(10) << "FAIL on ESTALE but attempting recovery" << dendl;
+ mdcache->find_ino_peers(req->get_filepath().get_ino(), new C_MDS_TryFindInode(this, mdr));
+ return;
+ }
+ respond_to_request(mdr, r);
+ return;
+ }
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+
+ CDentry *dn = trace[trace.size()-1];
+ assert(dn);
+ if (!dn->is_auth()) {
+ mdcache->request_forward(mdr, dn->authority().first);
+ return;
+ }
+
+ CInode *diri = dn->get_dir()->get_inode();
+
+ CDentry::linkage_t *dnl = dn->get_linkage(client, mdr);
+ assert(!dnl->is_null());
+
+ if (rmdir) {
+ dout(7) << "handle_client_rmdir on " << *dn << dendl;
+ } else {
+ dout(7) << "handle_client_unlink on " << *dn << dendl;
+ }
+ dout(7) << "dn links to " << *in << dendl;
+
+ // rmdir vs is_dir
+ if (in->is_dir()) {
+ if (rmdir) {
+ // do empty directory checks
+ if (_dir_is_nonempty_unlocked(mdr, in)) {
+ respond_to_request(mdr, -ENOTEMPTY);
+ return;
+ }
+ } else {
+ dout(7) << "handle_client_unlink on dir " << *in << ", returning error" << dendl;
+ respond_to_request(mdr, -EISDIR);
+ return;
+ }
+ } else {
+ if (rmdir) {
+ // unlink
+ dout(7) << "handle_client_rmdir on non-dir " << *in << ", returning error" << dendl;
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+ }
+
+ // -- create stray dentry? --
+ CDentry *straydn = NULL;
+ if (dnl->is_primary()) {
+ straydn = prepare_stray_dentry(mdr, dnl->get_inode());
+ if (!straydn)
+ return;
+ dout(10) << " straydn is " << *straydn << dendl;
+ } else if (mdr->straydn) {
+ mdr->unpin(mdr->straydn);
+ mdr->straydn = NULL;
+ }
+
+ // lock
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ for (int i=0; i<(int)trace.size()-1; i++)
+ rdlocks.insert(&trace[i]->lock);
+ xlocks.insert(&dn->lock);
+ wrlocks.insert(&diri->filelock);
+ wrlocks.insert(&diri->nestlock);
+ xlocks.insert(&in->linklock);
+ if (straydn) {
+ wrlocks.insert(&straydn->get_dir()->inode->filelock);
+ wrlocks.insert(&straydn->get_dir()->inode->nestlock);
+ xlocks.insert(&straydn->lock);
+ }
+ if (in->is_dir())
+ rdlocks.insert(&in->filelock); // to verify it's empty
+ mds->locker->include_snap_rdlocks(rdlocks, dnl->get_inode());
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (in->is_dir() &&
+ _dir_is_nonempty(mdr, in)) {
+ respond_to_request(mdr, -ENOTEMPTY);
+ return;
+ }
+
+ if ((!mdr->has_more() || mdr->more()->witnessed.empty())) {
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+ }
+
+ // yay!
+ if (in->is_dir() && in->has_subtree_root_dirfrag()) {
+ // subtree root auths need to be witnesses
+ set<mds_rank_t> witnesses;
+ in->list_replicas(witnesses);
+ dout(10) << " witnesses " << witnesses << ", have " << mdr->more()->witnessed << dendl;
+
+ for (set<mds_rank_t>::iterator p = witnesses.begin();
+ p != witnesses.end();
+ ++p) {
+ if (mdr->more()->witnessed.count(*p)) {
+ dout(10) << " already witnessed by mds." << *p << dendl;
+ } else if (mdr->more()->waiting_on_slave.count(*p)) {
+ dout(10) << " already waiting on witness mds." << *p << dendl;
+ } else {
+ if (!_rmdir_prepare_witness(mdr, *p, trace, straydn))
+ return;
+ }
+ }
+ if (!mdr->more()->waiting_on_slave.empty())
+ return; // we're waiting for a witness.
+ }
+
+ // ok!
+ if (dnl->is_remote() && !dnl->get_inode()->is_auth())
+ _link_remote(mdr, false, dn, dnl->get_inode());
+ else
+ _unlink_local(mdr, dn, straydn);
+}
+
+class C_MDS_unlink_local_finish : public ServerLogContext {
+ CDentry *dn;
+ CDentry *straydn;
+ version_t dnpv; // deleted dentry
+public:
+ C_MDS_unlink_local_finish(Server *s, MDRequestRef& r, CDentry *d, CDentry *sd) :
+ ServerLogContext(s, r), dn(d), straydn(sd),
+ dnpv(d->get_projected_version()) {}
+ void finish(int r) override {
+ assert(r == 0);
+ server->_unlink_local_finish(mdr, dn, straydn, dnpv);
+ }
+};
+
+void Server::_unlink_local(MDRequestRef& mdr, CDentry *dn, CDentry *straydn)
+{
+ dout(10) << "_unlink_local " << *dn << dendl;
+
+ CDentry::linkage_t *dnl = dn->get_projected_linkage();
+ CInode *in = dnl->get_inode();
+
+ SnapRealm *realm = in->find_snaprealm();
+ snapid_t follows = realm->get_newest_seq();
+
+ // ok, let's do it.
+ mdr->ls = mdlog->get_current_segment();
+
+ // prepare log entry
+ EUpdate *le = new EUpdate(mdlog, "unlink_local");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid());
+ if (!mdr->more()->witnessed.empty()) {
+ dout(20) << " noting uncommitted_slaves " << mdr->more()->witnessed << dendl;
+ le->reqid = mdr->reqid;
+ le->had_slaves = true;
+ mdcache->add_uncommitted_master(mdr->reqid, mdr->ls, mdr->more()->witnessed);
+ }
+
+ if (straydn) {
+ assert(dnl->is_primary());
+ straydn->push_projected_linkage(in);
+ straydn->first = follows + 1;
+ }
+
+ // the unlinked dentry
+ dn->pre_dirty();
+
+ inode_t *pi = in->project_inode();
+ dn->make_path_string(pi->stray_prior_path, true);
+ mdr->add_projected_inode(in); // do this _after_ my dn->pre_dirty().. we apply that one manually.
+ pi->version = in->pre_dirty();
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+ pi->nlink--;
+ if (pi->nlink == 0)
+ in->state_set(CInode::STATE_ORPHAN);
+
+ if (dnl->is_primary()) {
+ // primary link. add stray dentry.
+ assert(straydn);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, in, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, -1);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, in, straydn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1);
+
+ // project snaprealm, too
+ if (in->snaprealm || follows + 1 > in->get_oldest_snap())
+ in->project_past_snaprealm_parent(straydn->get_dir()->inode->find_snaprealm());
+
+ pi->update_backtrace();
+ le->metablob.add_primary_dentry(straydn, in, true, true);
+ } else {
+ // remote link. update remote inode.
+ mdcache->predirty_journal_parents(mdr, &le->metablob, in, dn->get_dir(), PREDIRTY_DIR, -1);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, in, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, in);
+ }
+
+ mdcache->journal_cow_dentry(mdr.get(), &le->metablob, dn);
+ le->metablob.add_null_dentry(dn, true);
+
+ if (in->is_dir()) {
+ dout(10) << " noting renamed (unlinked) dir ino " << in->ino() << " in metablob" << dendl;
+ le->metablob.renamed_dirino = in->ino();
+ }
+
+ dn->push_projected_linkage();
+
+ if (in->is_dir()) {
+ assert(straydn);
+ mdcache->project_subtree_rename(in, dn->get_dir(), straydn->get_dir());
+ }
+
+ journal_and_reply(mdr, 0, dn, le, new C_MDS_unlink_local_finish(this, mdr, dn, straydn));
+}
+
+void Server::_unlink_local_finish(MDRequestRef& mdr,
+ CDentry *dn, CDentry *straydn,
+ version_t dnpv)
+{
+ dout(10) << "_unlink_local_finish " << *dn << dendl;
+
+ if (!mdr->more()->witnessed.empty())
+ mdcache->logged_master_update(mdr->reqid);
+
+ // unlink main dentry
+ dn->get_dir()->unlink_inode(dn);
+ dn->pop_projected_linkage();
+
+ // relink as stray? (i.e. was primary link?)
+ CInode *strayin = NULL;
+ bool snap_is_new = false;
+ if (straydn) {
+ dout(20) << " straydn is " << *straydn << dendl;
+ CDentry::linkage_t *straydnl = straydn->pop_projected_linkage();
+ strayin = straydnl->get_inode();
+
+ snap_is_new = strayin->snaprealm ? true : false;
+ mdcache->touch_dentry_bottom(straydn);
+ }
+
+ dn->mark_dirty(dnpv, mdr->ls);
+ mdr->apply();
+
+ if (snap_is_new) //only new if strayin exists
+ mdcache->do_realm_invalidate_and_update_notify(strayin, CEPH_SNAP_OP_SPLIT, true);
+
+ mdcache->send_dentry_unlink(dn, straydn, mdr);
+
+ // update subtree map?
+ if (straydn && strayin->is_dir())
+ mdcache->adjust_subtree_after_rename(strayin, dn->get_dir(), true);
+
+ // bump pop
+ mds->balancer->hit_dir(mdr->get_mds_stamp(), dn->get_dir(), META_POP_IWR);
+
+ // reply
+ respond_to_request(mdr, 0);
+
+ // removing a new dn?
+ dn->get_dir()->try_remove_unlinked_dn(dn);
+
+ // clean up ?
+ // respond_to_request() drops locks. So stray reintegration can race with us.
+ if (straydn && !straydn->get_projected_linkage()->is_null()) {
+ // Tip off the MDCache that this dentry is a stray that
+ // might be elegible for purge.
+ mdcache->notify_stray(straydn);
+ }
+}
+
+bool Server::_rmdir_prepare_witness(MDRequestRef& mdr, mds_rank_t who, vector<CDentry*>& trace, CDentry *straydn)
+{
+ if (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(who)) {
+ dout(10) << "_rmdir_prepare_witness mds." << who << " is not active" << dendl;
+ if (mdr->more()->waiting_on_slave.empty())
+ mds->wait_for_active_peer(who, new C_MDS_RetryRequest(mdcache, mdr));
+ return false;
+ }
+
+ dout(10) << "_rmdir_prepare_witness mds." << who << dendl;
+ MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_RMDIRPREP);
+ req->srcdnpath = filepath(trace.front()->get_dir()->ino());
+ for (auto dn : trace)
+ req->srcdnpath.push_dentry(dn->name);
+ mdcache->replicate_stray(straydn, who, req->stray);
+
+ req->op_stamp = mdr->get_op_stamp();
+ mds->send_message_mds(req, who);
+
+ assert(mdr->more()->waiting_on_slave.count(who) == 0);
+ mdr->more()->waiting_on_slave.insert(who);
+ return true;
+}
+
+struct C_MDS_SlaveRmdirPrep : public ServerLogContext {
+ CDentry *dn, *straydn;
+ C_MDS_SlaveRmdirPrep(Server *s, MDRequestRef& r, CDentry *d, CDentry *st)
+ : ServerLogContext(s, r), dn(d), straydn(st) {}
+ void finish(int r) override {
+ server->_logged_slave_rmdir(mdr, dn, straydn);
+ }
+};
+
+struct C_MDS_SlaveRmdirCommit : public ServerContext {
+ MDRequestRef mdr;
+ CDentry *straydn;
+ C_MDS_SlaveRmdirCommit(Server *s, MDRequestRef& r, CDentry *sd)
+ : ServerContext(s), mdr(r), straydn(sd) { }
+ void finish(int r) override {
+ server->_commit_slave_rmdir(mdr, r, straydn);
+ }
+};
+
+void Server::handle_slave_rmdir_prep(MDRequestRef& mdr)
+{
+ dout(10) << "handle_slave_rmdir_prep " << *mdr
+ << " " << mdr->slave_request->srcdnpath
+ << " to " << mdr->slave_request->destdnpath
+ << dendl;
+
+ vector<CDentry*> trace;
+ filepath srcpath(mdr->slave_request->srcdnpath);
+ dout(10) << " src " << srcpath << dendl;
+ CInode *in;
+ int r = mdcache->path_traverse(mdr, NULL, NULL, srcpath, &trace, &in, MDS_TRAVERSE_DISCOVERXLOCK);
+ if (r > 0) return;
+ if (r == -ESTALE) {
+ mdcache->find_ino_peers(srcpath.get_ino(), new C_MDS_RetryRequest(mdcache, mdr),
+ mdr->slave_to_mds);
+ return;
+ }
+ assert(r == 0);
+ CDentry *dn = trace[trace.size()-1];
+ dout(10) << " dn " << *dn << dendl;
+ mdr->pin(dn);
+
+ assert(mdr->straydn);
+ CDentry *straydn = mdr->straydn;
+ dout(10) << " straydn " << *straydn << dendl;
+
+ mdr->set_op_stamp(mdr->slave_request->op_stamp);
+
+ rmdir_rollback rollback;
+ rollback.reqid = mdr->reqid;
+ rollback.src_dir = dn->get_dir()->dirfrag();
+ rollback.src_dname = dn->name;
+ rollback.dest_dir = straydn->get_dir()->dirfrag();
+ rollback.dest_dname = straydn->name;
+ ::encode(rollback, mdr->more()->rollback_bl);
+ dout(20) << " rollback is " << mdr->more()->rollback_bl.length() << " bytes" << dendl;
+
+ // set up commit waiter
+ mdr->more()->slave_commit = new C_MDS_SlaveRmdirCommit(this, mdr, straydn);
+
+ if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) {
+ dout(10) << " no auth subtree in " << *in << ", skipping journal" << dendl;
+ dn->get_dir()->unlink_inode(dn);
+ straydn->get_dir()->link_primary_inode(straydn, in);
+
+ assert(straydn->first >= in->first);
+ in->first = straydn->first;
+
+ mdcache->adjust_subtree_after_rename(in, dn->get_dir(), false);
+
+ MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_RMDIRPREPACK);
+ reply->mark_not_journaled();
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+
+ // send caps to auth (if we're not already)
+ if (in->is_any_caps() && !in->state_test(CInode::STATE_EXPORTINGCAPS))
+ mdcache->migrator->export_caps(in);
+
+ mdcache->touch_dentry_bottom(straydn); // move stray to end of lru
+
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ mdr->straydn = 0;
+ return;
+ }
+
+ straydn->push_projected_linkage(in);
+ dn->push_projected_linkage();
+
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rmdir", mdr->reqid, mdr->slave_to_mds,
+ ESlaveUpdate::OP_PREPARE, ESlaveUpdate::RMDIR);
+ mdlog->start_entry(le);
+ le->rollback = mdr->more()->rollback_bl;
+
+ le->commit.add_dir_context(straydn->get_dir());
+ le->commit.add_primary_dentry(straydn, in, true);
+ // slave: no need to journal original dentry
+
+ dout(10) << " noting renamed (unlinked) dir ino " << in->ino() << " in metablob" << dendl;
+ le->commit.renamed_dirino = in->ino();
+
+ mdcache->project_subtree_rename(in, dn->get_dir(), straydn->get_dir());
+
+ mdr->more()->slave_update_journaled = true;
+ submit_mdlog_entry(le, new C_MDS_SlaveRmdirPrep(this, mdr, dn, straydn),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_logged_slave_rmdir(MDRequestRef& mdr, CDentry *dn, CDentry *straydn)
+{
+ dout(10) << "_logged_slave_rmdir " << *mdr << " on " << *dn << dendl;
+
+ // update our cache now, so we are consistent with what is in the journal
+ // when we journal a subtree map
+ CInode *in = dn->get_linkage()->get_inode();
+ dn->get_dir()->unlink_inode(dn);
+ straydn->pop_projected_linkage();
+ dn->pop_projected_linkage();
+ mdcache->adjust_subtree_after_rename(in, dn->get_dir(), true);
+
+ // done.
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ mdr->straydn = 0;
+
+ if (!mdr->aborted) {
+ MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_RMDIRPREPACK);
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+ } else {
+ dout(10) << " abort flag set, finishing" << dendl;
+ mdcache->request_finish(mdr);
+ }
+}
+
+void Server::handle_slave_rmdir_prep_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack)
+{
+ dout(10) << "handle_slave_rmdir_prep_ack " << *mdr
+ << " " << *ack << dendl;
+
+ mds_rank_t from = mds_rank_t(ack->get_source().num());
+
+ mdr->more()->slaves.insert(from);
+ mdr->more()->witnessed.insert(from);
+ if (!ack->is_not_journaled())
+ mdr->more()->has_journaled_slaves = true;
+
+ // remove from waiting list
+ assert(mdr->more()->waiting_on_slave.count(from));
+ mdr->more()->waiting_on_slave.erase(from);
+
+ if (mdr->more()->waiting_on_slave.empty())
+ dispatch_client_request(mdr); // go again!
+ else
+ dout(10) << "still waiting on slaves " << mdr->more()->waiting_on_slave << dendl;
+}
+
+void Server::_commit_slave_rmdir(MDRequestRef& mdr, int r, CDentry *straydn)
+{
+ dout(10) << "_commit_slave_rmdir " << *mdr << " r=" << r << dendl;
+
+ if (r == 0) {
+ if (mdr->more()->slave_update_journaled) {
+ CInode *strayin = straydn->get_projected_linkage()->get_inode();
+ if (strayin && !strayin->snaprealm)
+ mdcache->clear_dirty_bits_for_stray(strayin);
+ }
+
+ mdr->cleanup();
+
+ if (mdr->more()->slave_update_journaled) {
+ // write a commit to the journal
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rmdir_commit", mdr->reqid,
+ mdr->slave_to_mds, ESlaveUpdate::OP_COMMIT,
+ ESlaveUpdate::RMDIR);
+ mdlog->start_entry(le);
+ submit_mdlog_entry(le, new C_MDS_CommittedSlave(this, mdr), mdr, __func__);
+ mdlog->flush();
+ } else {
+ _committed_slave(mdr);
+ }
+ } else {
+ // abort
+ do_rmdir_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr);
+ }
+}
+
+struct C_MDS_LoggedRmdirRollback : public ServerLogContext {
+ metareqid_t reqid;
+ CDentry *dn;
+ CDentry *straydn;
+ C_MDS_LoggedRmdirRollback(Server *s, MDRequestRef& m, metareqid_t mr, CDentry *d, CDentry *st)
+ : ServerLogContext(s, m), reqid(mr), dn(d), straydn(st) {}
+ void finish(int r) override {
+ server->_rmdir_rollback_finish(mdr, reqid, dn, straydn);
+ }
+};
+
+void Server::do_rmdir_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr)
+{
+ // unlink the other rollback methods, the rmdir rollback is only
+ // needed to record the subtree changes in the journal for inode
+ // replicas who are auth for empty dirfrags. no actual changes to
+ // the file system are taking place here, so there is no Mutation.
+
+ rmdir_rollback rollback;
+ bufferlist::iterator p = rbl.begin();
+ ::decode(rollback, p);
+
+ dout(10) << "do_rmdir_rollback on " << rollback.reqid << dendl;
+ mdcache->add_rollback(rollback.reqid, master); // need to finish this update before resolve finishes
+ assert(mdr || mds->is_resolve());
+
+ CDir *dir = mdcache->get_dirfrag(rollback.src_dir);
+ if (!dir)
+ dir = mdcache->get_dirfrag(rollback.src_dir.ino, rollback.src_dname);
+ assert(dir);
+ CDentry *dn = dir->lookup(rollback.src_dname);
+ assert(dn);
+ dout(10) << " dn " << *dn << dendl;
+ dir = mdcache->get_dirfrag(rollback.dest_dir);
+ assert(dir);
+ CDentry *straydn = dir->lookup(rollback.dest_dname);
+ assert(straydn);
+ dout(10) << " straydn " << *dn << dendl;
+ CInode *in = straydn->get_linkage()->get_inode();
+
+ if (mdr && !mdr->more()->slave_update_journaled) {
+ assert(!in->has_subtree_root_dirfrag(mds->get_nodeid()));
+
+ straydn->get_dir()->unlink_inode(straydn);
+ dn->get_dir()->link_primary_inode(dn, in);
+
+ mdcache->adjust_subtree_after_rename(in, straydn->get_dir(), false);
+
+ mdcache->request_finish(mdr);
+ mdcache->finish_rollback(rollback.reqid);
+ return;
+ }
+
+ dn->push_projected_linkage(in);
+ straydn->push_projected_linkage();
+
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rmdir_rollback", rollback.reqid, master,
+ ESlaveUpdate::OP_ROLLBACK, ESlaveUpdate::RMDIR);
+ mdlog->start_entry(le);
+
+ le->commit.add_dir_context(dn->get_dir());
+ le->commit.add_primary_dentry(dn, in, true);
+ // slave: no need to journal straydn
+
+ dout(10) << " noting renamed (unlinked) dir ino " << in->ino() << " in metablob" << dendl;
+ le->commit.renamed_dirino = in->ino();
+
+ mdcache->project_subtree_rename(in, straydn->get_dir(), dn->get_dir());
+
+ submit_mdlog_entry(le,
+ new C_MDS_LoggedRmdirRollback(this, mdr,rollback.reqid,
+ dn, straydn),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_rmdir_rollback_finish(MDRequestRef& mdr, metareqid_t reqid, CDentry *dn, CDentry *straydn)
+{
+ dout(10) << "_rmdir_rollback_finish " << reqid << dendl;
+
+ straydn->get_dir()->unlink_inode(straydn);
+ dn->pop_projected_linkage();
+ straydn->pop_projected_linkage();
+
+ CInode *in = dn->get_linkage()->get_inode();
+ mdcache->adjust_subtree_after_rename(in, straydn->get_dir(), true);
+ if (mds->is_resolve()) {
+ CDir *root = mdcache->get_subtree_root(straydn->get_dir());
+ mdcache->try_trim_non_auth_subtree(root);
+ }
+
+ if (mdr)
+ mdcache->request_finish(mdr);
+
+ mdcache->finish_rollback(reqid);
+}
+
+
+/** _dir_is_nonempty[_unlocked]
+ *
+ * check if a directory is non-empty (i.e. we can rmdir it).
+ *
+ * the unlocked varient this is a fastpath check. we can't really be
+ * sure until we rdlock the filelock.
+ */
+bool Server::_dir_is_nonempty_unlocked(MDRequestRef& mdr, CInode *in)
+{
+ dout(10) << "dir_is_nonempty_unlocked " << *in << dendl;
+ assert(in->is_auth());
+
+ if (in->snaprealm && in->snaprealm->srnode.snaps.size())
+ return true; // in a snapshot!
+
+ list<CDir*> ls;
+ in->get_dirfrags(ls);
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ CDir *dir = *p;
+ // is the frag obviously non-empty?
+ if (dir->is_auth()) {
+ if (dir->get_projected_fnode()->fragstat.size()) {
+ dout(10) << "dir_is_nonempty_unlocked dirstat has "
+ << dir->get_projected_fnode()->fragstat.size() << " items " << *dir << dendl;
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+bool Server::_dir_is_nonempty(MDRequestRef& mdr, CInode *in)
+{
+ dout(10) << "dir_is_nonempty " << *in << dendl;
+ assert(in->is_auth());
+ assert(in->filelock.can_read(mdr->get_client()));
+
+ frag_info_t dirstat;
+ version_t dirstat_version = in->get_projected_inode()->dirstat.version;
+
+ list<CDir*> ls;
+ in->get_dirfrags(ls);
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ CDir *dir = *p;
+ const fnode_t *pf = dir->get_projected_fnode();
+ if (pf->fragstat.size()) {
+ dout(10) << "dir_is_nonempty dirstat has "
+ << pf->fragstat.size() << " items " << *dir << dendl;
+ return true;
+ }
+
+ if (pf->accounted_fragstat.version == dirstat_version)
+ dirstat.add(pf->accounted_fragstat);
+ else
+ dirstat.add(pf->fragstat);
+ }
+
+ return dirstat.size() != in->get_projected_inode()->dirstat.size();
+}
+
+
+// ======================================================
+
+
+class C_MDS_rename_finish : public ServerLogContext {
+ CDentry *srcdn;
+ CDentry *destdn;
+ CDentry *straydn;
+public:
+ C_MDS_rename_finish(Server *s, MDRequestRef& r,
+ CDentry *sdn, CDentry *ddn, CDentry *stdn) :
+ ServerLogContext(s, r),
+ srcdn(sdn), destdn(ddn), straydn(stdn) { }
+ void finish(int r) override {
+ assert(r == 0);
+ server->_rename_finish(mdr, srcdn, destdn, straydn);
+ }
+};
+
+
+/** handle_client_rename
+ *
+ * rename master is the destdn auth. this is because cached inodes
+ * must remain connected. thus, any replica of srci, must also
+ * replicate destdn, and possibly straydn, so that srci (and
+ * destdn->inode) remain connected during the rename.
+ *
+ * to do this, we freeze srci, then master (destdn auth) verifies that
+ * all other nodes have also replciated destdn and straydn. note that
+ * destdn replicas need not also replicate srci. this only works when
+ * destdn is master.
+ *
+ * This function takes responsibility for the passed mdr.
+ */
+void Server::handle_client_rename(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ dout(7) << "handle_client_rename " << *req << dendl;
+
+ filepath destpath = req->get_filepath();
+ filepath srcpath = req->get_filepath2();
+ if (destpath.depth() == 0 || srcpath.depth() == 0) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ const string &destname = destpath.last_dentry();
+
+ vector<CDentry*>& srctrace = mdr->dn[1];
+ vector<CDentry*>& desttrace = mdr->dn[0];
+
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ CDentry *destdn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, true, false, true);
+ if (!destdn) return;
+ dout(10) << " destdn " << *destdn << dendl;
+ if (mdr->snapid != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ CDentry::linkage_t *destdnl = destdn->get_projected_linkage();
+ CDir *destdir = destdn->get_dir();
+ assert(destdir->is_auth());
+
+ int r = mdcache->path_traverse(mdr, NULL, NULL, srcpath, &srctrace, NULL, MDS_TRAVERSE_DISCOVER);
+ if (r > 0)
+ return; // delayed
+ if (r < 0) {
+ if (r == -ESTALE) {
+ dout(10) << "FAIL on ESTALE but attempting recovery" << dendl;
+ mdcache->find_ino_peers(srcpath.get_ino(), new C_MDS_TryFindInode(this, mdr));
+ } else {
+ dout(10) << "FAIL on error " << r << dendl;
+ respond_to_request(mdr, r);
+ }
+ return;
+
+ }
+ assert(!srctrace.empty());
+ CDentry *srcdn = srctrace[srctrace.size()-1];
+ dout(10) << " srcdn " << *srcdn << dendl;
+ if (srcdn->last != CEPH_NOSNAP) {
+ respond_to_request(mdr, -EROFS);
+ return;
+ }
+ CDentry::linkage_t *srcdnl = srcdn->get_projected_linkage();
+ CInode *srci = srcdnl->get_inode();
+ dout(10) << " srci " << *srci << dendl;
+
+ CInode *oldin = 0;
+ if (!destdnl->is_null()) {
+ //dout(10) << "dest dn exists " << *destdn << dendl;
+ oldin = mdcache->get_dentry_inode(destdn, mdr, true);
+ if (!oldin) return;
+ dout(10) << " oldin " << *oldin << dendl;
+
+ // non-empty dir? do trivial fast unlocked check, do another check later with read locks
+ if (oldin->is_dir() && _dir_is_nonempty_unlocked(mdr, oldin)) {
+ respond_to_request(mdr, -ENOTEMPTY);
+ return;
+ }
+
+ // if srcdn is replica, need to make sure its linkage is correct
+ if (srcdn->is_auth() ||
+ srcdn->lock.can_read(mdr->get_client()) ||
+ (srcdn->lock.is_xlocked() && srcdn->lock.get_xlock_by() == mdr)) {
+ // mv /some/thing /to/some/existing_other_thing
+ if (oldin->is_dir() && !srci->is_dir()) {
+ respond_to_request(mdr, -EISDIR);
+ return;
+ }
+ if (!oldin->is_dir() && srci->is_dir()) {
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+ if (srci == oldin && !srcdn->get_dir()->inode->is_stray()) {
+ respond_to_request(mdr, 0); // no-op. POSIX makes no sense.
+ return;
+ }
+ }
+ }
+
+ // -- some sanity checks --
+
+ // src+dest traces _must_ share a common ancestor for locking to prevent orphans
+ if (destpath.get_ino() != srcpath.get_ino() &&
+ !(req->get_source().is_mds() &&
+ MDS_INO_IS_MDSDIR(srcpath.get_ino()))) { // <-- mds 'rename' out of stray dir is ok!
+ CInode *srcbase = srctrace[0]->get_dir()->get_inode();
+ CInode *destbase = desttrace[0]->get_dir()->get_inode();
+ // ok, extend srctrace toward root until it is an ancestor of desttrace.
+ while (srcbase != destbase &&
+ !srcbase->is_projected_ancestor_of(destbase)) {
+ CDentry *pdn = srcbase->get_projected_parent_dn();
+ srctrace.insert(srctrace.begin(), pdn);
+ dout(10) << "rename prepending srctrace with " << *pdn << dendl;
+ srcbase = pdn->get_dir()->get_inode();
+ }
+
+ // then, extend destpath until it shares the same parent inode as srcpath.
+ while (destbase != srcbase) {
+ CDentry *pdn = destbase->get_projected_parent_dn();
+ desttrace.insert(desttrace.begin(), pdn);
+ rdlocks.insert(&pdn->lock);
+ dout(10) << "rename prepending desttrace with " << *pdn << dendl;
+ destbase = pdn->get_dir()->get_inode();
+ }
+ dout(10) << "rename src and dest traces now share common ancestor " << *destbase << dendl;
+ }
+
+ // src == dest?
+ if (srcdn->get_dir() == destdir && srcdn->name == destname) {
+ dout(7) << "rename src=dest, noop" << dendl;
+ respond_to_request(mdr, 0);
+ return;
+ }
+
+ // dest a child of src?
+ // e.g. mv /usr /usr/foo
+ CDentry *pdn = destdir->inode->get_projected_parent_dn();
+ while (pdn) {
+ if (pdn == srcdn) {
+ dout(7) << "cannot rename item to be a child of itself" << dendl;
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ pdn = pdn->get_dir()->inode->parent;
+ }
+
+ // is this a stray migration, reintegration or merge? (sanity checks!)
+ if (mdr->reqid.name.is_mds() &&
+ !(MDS_INO_IS_MDSDIR(srcpath.get_ino()) &&
+ MDS_INO_IS_MDSDIR(destpath.get_ino())) &&
+ !(destdnl->is_remote() &&
+ destdnl->get_remote_ino() == srci->ino())) {
+ respond_to_request(mdr, -EINVAL); // actually, this won't reply, but whatev.
+ return;
+ }
+
+ bool linkmerge = (srcdnl->get_inode() == destdnl->get_inode() &&
+ (srcdnl->is_primary() || destdnl->is_primary()));
+ if (linkmerge)
+ dout(10) << " this is a link merge" << dendl;
+
+ // -- create stray dentry? --
+ CDentry *straydn = NULL;
+ if (destdnl->is_primary() && !linkmerge) {
+ straydn = prepare_stray_dentry(mdr, destdnl->get_inode());
+ if (!straydn)
+ return;
+ dout(10) << " straydn is " << *straydn << dendl;
+ } else if (mdr->straydn) {
+ mdr->unpin(mdr->straydn);
+ mdr->straydn = NULL;
+ }
+
+ // -- prepare witness list --
+ /*
+ * NOTE: we use _all_ replicas as witnesses.
+ * this probably isn't totally necessary (esp for file renames),
+ * but if/when we change that, we have to make sure rejoin is
+ * sufficiently robust to handle strong rejoins from survivors
+ * with totally wrong dentry->inode linkage.
+ * (currently, it can ignore rename effects, because the resolve
+ * stage will sort them out.)
+ */
+ set<mds_rank_t> witnesses = mdr->more()->extra_witnesses;
+ if (srcdn->is_auth())
+ srcdn->list_replicas(witnesses);
+ else
+ witnesses.insert(srcdn->authority().first);
+ if (srcdnl->is_remote() && !srci->is_auth())
+ witnesses.insert(srci->authority().first);
+ destdn->list_replicas(witnesses);
+ if (destdnl->is_remote() && !oldin->is_auth())
+ witnesses.insert(oldin->authority().first);
+ dout(10) << " witnesses " << witnesses << ", have " << mdr->more()->witnessed << dendl;
+
+
+ // -- locks --
+ map<SimpleLock*, mds_rank_t> remote_wrlocks;
+
+ // srctrace items. this mirrors locks taken in rdlock_path_xlock_dentry
+ for (int i=0; i<(int)srctrace.size(); i++)
+ rdlocks.insert(&srctrace[i]->lock);
+ xlocks.insert(&srcdn->lock);
+ mds_rank_t srcdirauth = srcdn->get_dir()->authority().first;
+ if (srcdirauth != mds->get_nodeid()) {
+ dout(10) << " will remote_wrlock srcdir scatterlocks on mds." << srcdirauth << dendl;
+ remote_wrlocks[&srcdn->get_dir()->inode->filelock] = srcdirauth;
+ remote_wrlocks[&srcdn->get_dir()->inode->nestlock] = srcdirauth;
+ if (srci->is_dir())
+ rdlocks.insert(&srci->dirfragtreelock);
+ } else {
+ wrlocks.insert(&srcdn->get_dir()->inode->filelock);
+ wrlocks.insert(&srcdn->get_dir()->inode->nestlock);
+ }
+ mds->locker->include_snap_rdlocks(rdlocks, srcdn->get_dir()->inode);
+
+ // straydn?
+ if (straydn) {
+ wrlocks.insert(&straydn->get_dir()->inode->filelock);
+ wrlocks.insert(&straydn->get_dir()->inode->nestlock);
+ xlocks.insert(&straydn->lock);
+ }
+
+ // xlock versionlock on dentries if there are witnesses.
+ // replicas can't see projected dentry linkages, and will get
+ // confused if we try to pipeline things.
+ if (!witnesses.empty()) {
+ // take xlock on all projected ancestor dentries for srcdn and destdn.
+ // this ensures the srcdn and destdn can be traversed to by the witnesses.
+ for (int i= 0; i<(int)srctrace.size(); i++) {
+ if (srctrace[i]->is_auth() && srctrace[i]->is_projected())
+ xlocks.insert(&srctrace[i]->versionlock);
+ }
+ for (int i=0; i<(int)desttrace.size(); i++) {
+ if (desttrace[i]->is_auth() && desttrace[i]->is_projected())
+ xlocks.insert(&desttrace[i]->versionlock);
+ }
+ // xlock srci and oldin's primary dentries, so witnesses can call
+ // open_remote_ino() with 'want_locked=true' when the srcdn or destdn
+ // is traversed.
+ if (srcdnl->is_remote())
+ xlocks.insert(&srci->get_projected_parent_dn()->lock);
+ if (destdnl->is_remote())
+ xlocks.insert(&oldin->get_projected_parent_dn()->lock);
+ }
+
+ // we need to update srci's ctime. xlock its least contended lock to do that...
+ xlocks.insert(&srci->linklock);
+
+ // xlock oldin (for nlink--)
+ if (oldin) {
+ xlocks.insert(&oldin->linklock);
+ if (oldin->is_dir())
+ rdlocks.insert(&oldin->filelock);
+ }
+ if (srcdnl->is_primary() && srci->is_dir())
+ // FIXME: this should happen whenever we are renamning between
+ // realms, regardless of the file type
+ // FIXME: If/when this changes, make sure to update the
+ // "allowance" in handle_slave_rename_prep
+ xlocks.insert(&srci->snaplock); // FIXME: an auth bcast could be sufficient?
+ else
+ rdlocks.insert(&srci->snaplock);
+
+ CInode *auth_pin_freeze = !srcdn->is_auth() && srcdnl->is_primary() ? srci : NULL;
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks,
+ &remote_wrlocks, auth_pin_freeze))
+ return;
+
+ if ((!mdr->has_more() || mdr->more()->witnessed.empty())) {
+ if (!check_access(mdr, srcdn->get_dir()->get_inode(), MAY_WRITE))
+ return;
+
+ if (!check_access(mdr, destdn->get_dir()->get_inode(), MAY_WRITE))
+ return;
+
+ if (!check_fragment_space(mdr, destdn->get_dir()))
+ return;
+
+ if (!check_access(mdr, srci, MAY_WRITE))
+ return;
+ }
+
+ // with read lock, really verify oldin is empty
+ if (oldin &&
+ oldin->is_dir() &&
+ _dir_is_nonempty(mdr, oldin)) {
+ respond_to_request(mdr, -ENOTEMPTY);
+ return;
+ }
+
+ /* project_past_snaprealm_parent() will do this job
+ *
+ // moving between snaprealms?
+ if (srcdnl->is_primary() && srci->is_multiversion() && !srci->snaprealm) {
+ SnapRealm *srcrealm = srci->find_snaprealm();
+ SnapRealm *destrealm = destdn->get_dir()->inode->find_snaprealm();
+ if (srcrealm != destrealm &&
+ (srcrealm->get_newest_seq() + 1 > srcdn->first ||
+ destrealm->get_newest_seq() + 1 > srcdn->first)) {
+ dout(10) << " renaming between snaprealms, creating snaprealm for " << *srci << dendl;
+ mdcache->snaprealm_create(mdr, srci);
+ return;
+ }
+ }
+ */
+
+ assert(g_conf->mds_kill_rename_at != 1);
+
+ // -- open all srcdn inode frags, if any --
+ // we need these open so that auth can properly delegate from inode to dirfrags
+ // after the inode is _ours_.
+ if (srcdnl->is_primary() &&
+ !srcdn->is_auth() &&
+ srci->is_dir()) {
+ dout(10) << "srci is remote dir, setting stickydirs and opening all frags" << dendl;
+ mdr->set_stickydirs(srci);
+
+ list<frag_t> frags;
+ srci->dirfragtree.get_leaves(frags);
+ for (list<frag_t>::iterator p = frags.begin();
+ p != frags.end();
+ ++p) {
+ CDir *dir = srci->get_dirfrag(*p);
+ if (!dir) {
+ dout(10) << " opening " << *p << " under " << *srci << dendl;
+ mdcache->open_remote_dirfrag(srci, *p, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ }
+ }
+
+ // -- prepare witnesses --
+
+ // do srcdn auth last
+ mds_rank_t last = MDS_RANK_NONE;
+ if (!srcdn->is_auth()) {
+ last = srcdn->authority().first;
+ mdr->more()->srcdn_auth_mds = last;
+ // ask auth of srci to mark srci as ambiguous auth if more than two MDS
+ // are involved in the rename operation.
+ if (srcdnl->is_primary() && !mdr->more()->is_ambiguous_auth) {
+ dout(10) << " preparing ambiguous auth for srci" << dendl;
+ assert(mdr->more()->is_remote_frozen_authpin);
+ assert(mdr->more()->rename_inode == srci);
+ _rename_prepare_witness(mdr, last, witnesses, srctrace, desttrace, straydn);
+ return;
+ }
+ }
+
+ for (set<mds_rank_t>::iterator p = witnesses.begin();
+ p != witnesses.end();
+ ++p) {
+ if (*p == last) continue; // do it last!
+ if (mdr->more()->witnessed.count(*p)) {
+ dout(10) << " already witnessed by mds." << *p << dendl;
+ } else if (mdr->more()->waiting_on_slave.count(*p)) {
+ dout(10) << " already waiting on witness mds." << *p << dendl;
+ } else {
+ if (!_rename_prepare_witness(mdr, *p, witnesses, srctrace, desttrace, straydn))
+ return;
+ }
+ }
+ if (!mdr->more()->waiting_on_slave.empty())
+ return; // we're waiting for a witness.
+
+ if (last != MDS_RANK_NONE && mdr->more()->witnessed.count(last) == 0) {
+ dout(10) << " preparing last witness (srcdn auth)" << dendl;
+ assert(mdr->more()->waiting_on_slave.count(last) == 0);
+ _rename_prepare_witness(mdr, last, witnesses, srctrace, desttrace, straydn);
+ return;
+ }
+
+ // test hack: bail after slave does prepare, so we can verify it's _live_ rollback.
+ if (!mdr->more()->slaves.empty() && !srci->is_dir())
+ assert(g_conf->mds_kill_rename_at != 3);
+ if (!mdr->more()->slaves.empty() && srci->is_dir())
+ assert(g_conf->mds_kill_rename_at != 4);
+
+ // -- declare now --
+ mdr->set_mds_stamp(ceph_clock_now());
+
+ // -- prepare journal entry --
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "rename");
+ mdlog->start_entry(le);
+ le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid());
+ if (!mdr->more()->witnessed.empty()) {
+ dout(20) << " noting uncommitted_slaves " << mdr->more()->witnessed << dendl;
+
+ le->reqid = mdr->reqid;
+ le->had_slaves = true;
+
+ mdcache->add_uncommitted_master(mdr->reqid, mdr->ls, mdr->more()->witnessed);
+ // no need to send frozen auth pin to recovring auth MDS of srci
+ mdr->more()->is_remote_frozen_authpin = false;
+ }
+
+ _rename_prepare(mdr, &le->metablob, &le->client_map, srcdn, destdn, straydn);
+ if (le->client_map.length())
+ le->cmapv = mds->sessionmap.get_projected();
+
+ // -- commit locally --
+ C_MDS_rename_finish *fin = new C_MDS_rename_finish(this, mdr, srcdn, destdn, straydn);
+
+ journal_and_reply(mdr, srci, destdn, le, fin);
+}
+
+
+void Server::_rename_finish(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn)
+{
+ dout(10) << "_rename_finish " << *mdr << dendl;
+
+ if (!mdr->more()->witnessed.empty())
+ mdcache->logged_master_update(mdr->reqid);
+
+ // apply
+ _rename_apply(mdr, srcdn, destdn, straydn);
+
+ mdcache->send_dentry_link(destdn, mdr);
+
+ CDentry::linkage_t *destdnl = destdn->get_linkage();
+ CInode *in = destdnl->get_inode();
+ bool need_eval = mdr->more()->cap_imports.count(in);
+
+ // test hack: test slave commit
+ if (!mdr->more()->slaves.empty() && !in->is_dir())
+ assert(g_conf->mds_kill_rename_at != 5);
+ if (!mdr->more()->slaves.empty() && in->is_dir())
+ assert(g_conf->mds_kill_rename_at != 6);
+
+ // bump popularity
+ mds->balancer->hit_dir(mdr->get_mds_stamp(), srcdn->get_dir(), META_POP_IWR);
+ if (destdnl->is_remote() && in->is_auth())
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), in, META_POP_IWR);
+
+ // did we import srci? if so, explicitly ack that import that, before we unlock and reply.
+
+ assert(g_conf->mds_kill_rename_at != 7);
+
+ // reply
+ respond_to_request(mdr, 0);
+
+ if (need_eval)
+ mds->locker->eval(in, CEPH_CAP_LOCKS, true);
+
+ // clean up?
+ // respond_to_request() drops locks. So stray reintegration can race with us.
+ if (straydn && !straydn->get_projected_linkage()->is_null()) {
+ mdcache->notify_stray(straydn);
+ }
+}
+
+
+
+// helpers
+
+bool Server::_rename_prepare_witness(MDRequestRef& mdr, mds_rank_t who, set<mds_rank_t> &witnesse,
+ vector<CDentry*>& srctrace, vector<CDentry*>& dsttrace, CDentry *straydn)
+{
+ if (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(who)) {
+ dout(10) << "_rename_prepare_witness mds." << who << " is not active" << dendl;
+ if (mdr->more()->waiting_on_slave.empty())
+ mds->wait_for_active_peer(who, new C_MDS_RetryRequest(mdcache, mdr));
+ return false;
+ }
+
+ dout(10) << "_rename_prepare_witness mds." << who << dendl;
+ MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_RENAMEPREP);
+
+ req->srcdnpath = filepath(srctrace.front()->get_dir()->ino());
+ for (auto dn : srctrace)
+ req->srcdnpath.push_dentry(dn->name);
+ req->destdnpath = filepath(dsttrace.front()->get_dir()->ino());
+ for (auto dn : dsttrace)
+ req->destdnpath.push_dentry(dn->name);
+ if (straydn)
+ mdcache->replicate_stray(straydn, who, req->stray);
+
+ req->srcdn_auth = mdr->more()->srcdn_auth_mds;
+
+ // srcdn auth will verify our current witness list is sufficient
+ req->witnesses = witnesse;
+
+ req->op_stamp = mdr->get_op_stamp();
+ mds->send_message_mds(req, who);
+
+ assert(mdr->more()->waiting_on_slave.count(who) == 0);
+ mdr->more()->waiting_on_slave.insert(who);
+ return true;
+}
+
+version_t Server::_rename_prepare_import(MDRequestRef& mdr, CDentry *srcdn, bufferlist *client_map_bl)
+{
+ version_t oldpv = mdr->more()->inode_import_v;
+
+ CDentry::linkage_t *srcdnl = srcdn->get_linkage();
+
+ /* import node */
+ bufferlist::iterator blp = mdr->more()->inode_import.begin();
+
+ // imported caps
+ ::decode(mdr->more()->imported_client_map, blp);
+ ::encode(mdr->more()->imported_client_map, *client_map_bl,
+ mds->mdsmap->get_up_features());
+ prepare_force_open_sessions(mdr->more()->imported_client_map, mdr->more()->sseq_map);
+
+ list<ScatterLock*> updated_scatterlocks;
+ mdcache->migrator->decode_import_inode(srcdn, blp, srcdn->authority().first, mdr->ls,
+ mdr->more()->cap_imports, updated_scatterlocks);
+
+ // hack: force back to !auth and clean, temporarily
+ srcdnl->get_inode()->state_clear(CInode::STATE_AUTH);
+ srcdnl->get_inode()->mark_clean();
+
+ return oldpv;
+}
+
+bool Server::_need_force_journal(CInode *diri, bool empty)
+{
+ list<CDir*> ls;
+ diri->get_dirfrags(ls);
+
+ bool force_journal = false;
+ if (empty) {
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ if ((*p)->is_subtree_root() && (*p)->get_dir_auth().first == mds->get_nodeid()) {
+ dout(10) << " frag " << (*p)->get_frag() << " is auth subtree dirfrag, will force journal" << dendl;
+ force_journal = true;
+ break;
+ } else
+ dout(20) << " frag " << (*p)->get_frag() << " is not auth subtree dirfrag" << dendl;
+ }
+ } else {
+ // see if any children of our frags are auth subtrees.
+ list<CDir*> subtrees;
+ mdcache->list_subtrees(subtrees);
+ dout(10) << " subtrees " << subtrees << " frags " << ls << dendl;
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ CDir *dir = *p;
+ for (list<CDir*>::iterator q = subtrees.begin(); q != subtrees.end(); ++q) {
+ if (dir->contains(*q)) {
+ if ((*q)->get_dir_auth().first == mds->get_nodeid()) {
+ dout(10) << " frag " << (*p)->get_frag() << " contains (maybe) auth subtree, will force journal "
+ << **q << dendl;
+ force_journal = true;
+ break;
+ } else
+ dout(20) << " frag " << (*p)->get_frag() << " contains but isn't auth for " << **q << dendl;
+ } else
+ dout(20) << " frag " << (*p)->get_frag() << " does not contain " << **q << dendl;
+ }
+ if (force_journal)
+ break;
+ }
+ }
+ return force_journal;
+}
+
+void Server::_rename_prepare(MDRequestRef& mdr,
+ EMetaBlob *metablob, bufferlist *client_map_bl,
+ CDentry *srcdn, CDentry *destdn, CDentry *straydn)
+{
+ dout(10) << "_rename_prepare " << *mdr << " " << *srcdn << " " << *destdn << dendl;
+ if (straydn)
+ dout(10) << " straydn " << *straydn << dendl;
+
+ CDentry::linkage_t *srcdnl = srcdn->get_projected_linkage();
+ CDentry::linkage_t *destdnl = destdn->get_projected_linkage();
+ CInode *srci = srcdnl->get_inode();
+ CInode *oldin = destdnl->get_inode();
+
+ // primary+remote link merge?
+ bool linkmerge = (srci == destdnl->get_inode() &&
+ (srcdnl->is_primary() || destdnl->is_primary()));
+ bool silent = srcdn->get_dir()->inode->is_stray();
+
+ bool force_journal_dest = false;
+ if (srci->is_dir() && !destdn->is_auth()) {
+ if (srci->is_auth()) {
+ // if we are auth for srci and exporting it, force journal because journal replay needs
+ // the source inode to create auth subtrees.
+ dout(10) << " we are exporting srci, will force journal destdn" << dendl;
+ force_journal_dest = true;
+ } else
+ force_journal_dest = _need_force_journal(srci, false);
+ }
+
+ bool force_journal_stray = false;
+ if (oldin && oldin->is_dir() && straydn && !straydn->is_auth())
+ force_journal_stray = _need_force_journal(oldin, true);
+
+ if (linkmerge)
+ dout(10) << " merging remote and primary links to the same inode" << dendl;
+ if (silent)
+ dout(10) << " reintegrating stray; will avoid changing nlink or dir mtime" << dendl;
+ if (force_journal_dest)
+ dout(10) << " forcing journal destdn because we (will) have auth subtrees nested beneath it" << dendl;
+ if (force_journal_stray)
+ dout(10) << " forcing journal straydn because we (will) have auth subtrees nested beneath it" << dendl;
+
+ if (srci->is_dir() && (destdn->is_auth() || force_journal_dest)) {
+ dout(10) << " noting renamed dir ino " << srci->ino() << " in metablob" << dendl;
+ metablob->renamed_dirino = srci->ino();
+ } else if (oldin && oldin->is_dir() && force_journal_stray) {
+ dout(10) << " noting rename target dir " << oldin->ino() << " in metablob" << dendl;
+ metablob->renamed_dirino = oldin->ino();
+ }
+
+ // prepare
+ inode_t *pi = 0; // renamed inode
+ inode_t *tpi = 0; // target/overwritten inode
+
+ // target inode
+ if (!linkmerge) {
+ if (destdnl->is_primary()) {
+ assert(straydn); // moving to straydn.
+ // link--, and move.
+ if (destdn->is_auth()) {
+ tpi = oldin->project_inode(); //project_snaprealm
+ tpi->version = straydn->pre_dirty(tpi->version);
+ tpi->update_backtrace();
+ }
+ straydn->push_projected_linkage(oldin);
+ } else if (destdnl->is_remote()) {
+ // nlink-- targeti
+ if (oldin->is_auth()) {
+ tpi = oldin->project_inode();
+ tpi->version = oldin->pre_dirty();
+ }
+ }
+ }
+
+ // dest
+ if (srcdnl->is_remote()) {
+ if (!linkmerge) {
+ // destdn
+ if (destdn->is_auth())
+ mdr->more()->pvmap[destdn] = destdn->pre_dirty();
+ destdn->push_projected_linkage(srcdnl->get_remote_ino(), srcdnl->get_remote_d_type());
+ // srci
+ if (srci->is_auth()) {
+ pi = srci->project_inode();
+ pi->version = srci->pre_dirty();
+ }
+ } else {
+ dout(10) << " will merge remote onto primary link" << dendl;
+ if (destdn->is_auth()) {
+ pi = oldin->project_inode();
+ pi->version = mdr->more()->pvmap[destdn] = destdn->pre_dirty(oldin->inode.version);
+ }
+ }
+ } else { // primary
+ if (destdn->is_auth()) {
+ version_t oldpv;
+ if (srcdn->is_auth())
+ oldpv = srci->get_projected_version();
+ else {
+ oldpv = _rename_prepare_import(mdr, srcdn, client_map_bl);
+
+ // note which dirfrags have child subtrees in the journal
+ // event, so that we can open those (as bounds) during replay.
+ if (srci->is_dir()) {
+ list<CDir*> ls;
+ srci->get_dirfrags(ls);
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ CDir *dir = *p;
+ if (!dir->is_auth())
+ metablob->renamed_dir_frags.push_back(dir->get_frag());
+ }
+ dout(10) << " noting renamed dir open frags " << metablob->renamed_dir_frags << dendl;
+ }
+ }
+ pi = srci->project_inode(); // project snaprealm if srcdnl->is_primary
+ // & srcdnl->snaprealm
+ pi->version = mdr->more()->pvmap[destdn] = destdn->pre_dirty(oldpv);
+ pi->update_backtrace();
+ }
+ destdn->push_projected_linkage(srci);
+ }
+
+ // src
+ if (srcdn->is_auth())
+ mdr->more()->pvmap[srcdn] = srcdn->pre_dirty();
+ srcdn->push_projected_linkage(); // push null linkage
+
+ if (!silent) {
+ if (pi) {
+ pi->ctime = mdr->get_op_stamp();
+ pi->change_attr++;
+ if (linkmerge)
+ pi->nlink--;
+ }
+ if (tpi) {
+ tpi->ctime = mdr->get_op_stamp();
+ tpi->change_attr++;
+ destdn->make_path_string(tpi->stray_prior_path, true);
+ tpi->nlink--;
+ if (tpi->nlink == 0)
+ oldin->state_set(CInode::STATE_ORPHAN);
+ }
+ }
+
+ // prepare nesting, mtime updates
+ int predirty_dir = silent ? 0:PREDIRTY_DIR;
+
+ // guarantee stray dir is processed first during journal replay. unlink the old inode,
+ // then link the source inode to destdn
+ if (destdnl->is_primary()) {
+ assert(straydn);
+ if (straydn->is_auth()) {
+ metablob->add_dir_context(straydn->get_dir());
+ metablob->add_dir(straydn->get_dir(), true);
+ }
+ }
+
+ // sub off target
+ if (destdn->is_auth() && !destdnl->is_null()) {
+ mdcache->predirty_journal_parents(mdr, metablob, oldin, destdn->get_dir(),
+ (destdnl->is_primary() ? PREDIRTY_PRIMARY:0)|predirty_dir, -1);
+ if (destdnl->is_primary()) {
+ assert(straydn);
+ mdcache->predirty_journal_parents(mdr, metablob, oldin, straydn->get_dir(),
+ PREDIRTY_PRIMARY|PREDIRTY_DIR, 1);
+ }
+ }
+
+ // move srcdn
+ int predirty_primary = (srcdnl->is_primary() && srcdn->get_dir() != destdn->get_dir()) ? PREDIRTY_PRIMARY:0;
+ int flags = predirty_dir | predirty_primary;
+ if (srcdn->is_auth())
+ mdcache->predirty_journal_parents(mdr, metablob, srci, srcdn->get_dir(), PREDIRTY_SHALLOW|flags, -1);
+ if (destdn->is_auth())
+ mdcache->predirty_journal_parents(mdr, metablob, srci, destdn->get_dir(), flags, 1);
+
+ SnapRealm *src_realm = srci->find_snaprealm();
+ SnapRealm *dest_realm = destdn->get_dir()->inode->find_snaprealm();
+ snapid_t next_dest_snap = dest_realm->get_newest_seq() + 1;
+
+ // add it all to the metablob
+ // target inode
+ if (!linkmerge) {
+ if (destdnl->is_primary()) {
+ assert(straydn);
+ if (destdn->is_auth()) {
+ // project snaprealm, too
+ if (oldin->snaprealm || dest_realm->get_newest_seq() + 1 > oldin->get_oldest_snap())
+ oldin->project_past_snaprealm_parent(straydn->get_dir()->inode->find_snaprealm());
+ straydn->first = MAX(oldin->first, next_dest_snap);
+ metablob->add_primary_dentry(straydn, oldin, true, true);
+ } else if (force_journal_stray) {
+ dout(10) << " forced journaling straydn " << *straydn << dendl;
+ metablob->add_dir_context(straydn->get_dir());
+ metablob->add_primary_dentry(straydn, oldin, true);
+ }
+ } else if (destdnl->is_remote()) {
+ if (oldin->is_auth()) {
+ // auth for targeti
+ metablob->add_dir_context(oldin->get_projected_parent_dir());
+ mdcache->journal_cow_dentry(mdr.get(), metablob, oldin->get_projected_parent_dn(),
+ CEPH_NOSNAP, 0, destdnl);
+ metablob->add_primary_dentry(oldin->get_projected_parent_dn(), oldin, true);
+ }
+ }
+ }
+
+ // dest
+ if (srcdnl->is_remote()) {
+ if (!linkmerge) {
+ if (destdn->is_auth() && !destdnl->is_null())
+ mdcache->journal_cow_dentry(mdr.get(), metablob, destdn, CEPH_NOSNAP, 0, destdnl);
+ else
+ destdn->first = MAX(destdn->first, next_dest_snap);
+
+ if (destdn->is_auth())
+ metablob->add_remote_dentry(destdn, true, srcdnl->get_remote_ino(), srcdnl->get_remote_d_type());
+ if (srci->get_projected_parent_dn()->is_auth()) { // it's remote
+ metablob->add_dir_context(srci->get_projected_parent_dir());
+ mdcache->journal_cow_dentry(mdr.get(), metablob, srci->get_projected_parent_dn(), CEPH_NOSNAP, 0, srcdnl);
+ metablob->add_primary_dentry(srci->get_projected_parent_dn(), srci, true);
+ }
+ } else {
+ if (destdn->is_auth() && !destdnl->is_null())
+ mdcache->journal_cow_dentry(mdr.get(), metablob, destdn, CEPH_NOSNAP, 0, destdnl);
+ else
+ destdn->first = MAX(destdn->first, next_dest_snap);
+
+ if (destdn->is_auth())
+ metablob->add_primary_dentry(destdn, destdnl->get_inode(), true, true);
+ }
+ } else if (srcdnl->is_primary()) {
+ // project snap parent update?
+ if (destdn->is_auth() && src_realm != dest_realm &&
+ (srci->snaprealm || src_realm->get_newest_seq() + 1 > srci->get_oldest_snap()))
+ srci->project_past_snaprealm_parent(dest_realm);
+
+ if (destdn->is_auth() && !destdnl->is_null())
+ mdcache->journal_cow_dentry(mdr.get(), metablob, destdn, CEPH_NOSNAP, 0, destdnl);
+ else
+ destdn->first = MAX(destdn->first, next_dest_snap);
+
+ if (destdn->is_auth())
+ metablob->add_primary_dentry(destdn, srci, true, true);
+ else if (force_journal_dest) {
+ dout(10) << " forced journaling destdn " << *destdn << dendl;
+ metablob->add_dir_context(destdn->get_dir());
+ metablob->add_primary_dentry(destdn, srci, true);
+ if (srcdn->is_auth() && srci->is_dir()) {
+ // journal new subtrees root dirfrags
+ list<CDir*> ls;
+ srci->get_dirfrags(ls);
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ CDir *dir = *p;
+ if (dir->is_auth())
+ metablob->add_dir(dir, true);
+ }
+ }
+ }
+ }
+
+ // src
+ if (srcdn->is_auth()) {
+ dout(10) << " journaling srcdn " << *srcdn << dendl;
+ mdcache->journal_cow_dentry(mdr.get(), metablob, srcdn, CEPH_NOSNAP, 0, srcdnl);
+ // also journal the inode in case we need do slave rename rollback. It is Ok to add
+ // both primary and NULL dentries. Because during journal replay, null dentry is
+ // processed after primary dentry.
+ if (srcdnl->is_primary() && !srci->is_dir() && !destdn->is_auth())
+ metablob->add_primary_dentry(srcdn, srci, true);
+ metablob->add_null_dentry(srcdn, true);
+ } else
+ dout(10) << " NOT journaling srcdn " << *srcdn << dendl;
+
+ // make renamed inode first track the dn
+ if (srcdnl->is_primary() && destdn->is_auth())
+ srci->first = destdn->first;
+
+ if (oldin && oldin->is_dir()) {
+ assert(straydn);
+ mdcache->project_subtree_rename(oldin, destdn->get_dir(), straydn->get_dir());
+ }
+ if (srci->is_dir())
+ mdcache->project_subtree_rename(srci, srcdn->get_dir(), destdn->get_dir());
+
+}
+
+
+void Server::_rename_apply(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn)
+{
+ dout(10) << "_rename_apply " << *mdr << " " << *srcdn << " " << *destdn << dendl;
+ dout(10) << " pvs " << mdr->more()->pvmap << dendl;
+
+ CDentry::linkage_t *srcdnl = srcdn->get_linkage();
+ CDentry::linkage_t *destdnl = destdn->get_linkage();
+
+ CInode *oldin = destdnl->get_inode();
+
+ // primary+remote link merge?
+ bool linkmerge = (srcdnl->get_inode() == destdnl->get_inode() &&
+ (srcdnl->is_primary() || destdnl->is_primary()));
+
+ // target inode
+ if (!linkmerge) {
+ if (destdnl->is_primary()) {
+ assert(straydn);
+ dout(10) << "straydn is " << *straydn << dendl;
+ destdn->get_dir()->unlink_inode(destdn, false);
+
+ straydn->pop_projected_linkage();
+ if (mdr->is_slave() && !mdr->more()->slave_update_journaled)
+ assert(!straydn->is_projected()); // no other projected
+
+ mdcache->touch_dentry_bottom(straydn); // drop dn as quickly as possible.
+
+ // nlink-- targeti
+ if (destdn->is_auth()) {
+ bool hadrealm = (oldin->snaprealm ? true : false);
+ oldin->pop_and_dirty_projected_inode(mdr->ls);
+ if (oldin->snaprealm && !hadrealm)
+ mdcache->do_realm_invalidate_and_update_notify(oldin, CEPH_SNAP_OP_SPLIT);
+ } else {
+ // FIXME this snaprealm is not filled out correctly
+ //oldin->open_snaprealm(); might be sufficient..
+ }
+ } else if (destdnl->is_remote()) {
+ destdn->get_dir()->unlink_inode(destdn, false);
+ if (oldin->is_auth())
+ oldin->pop_and_dirty_projected_inode(mdr->ls);
+ }
+ }
+
+ // unlink src before we relink it at dest
+ CInode *in = srcdnl->get_inode();
+ assert(in);
+
+ bool srcdn_was_remote = srcdnl->is_remote();
+ srcdn->get_dir()->unlink_inode(srcdn);
+
+ // dest
+ if (srcdn_was_remote) {
+ if (!linkmerge) {
+ // destdn
+ destdnl = destdn->pop_projected_linkage();
+ if (mdr->is_slave() && !mdr->more()->slave_update_journaled)
+ assert(!destdn->is_projected()); // no other projected
+
+ destdn->link_remote(destdnl, in);
+ if (destdn->is_auth())
+ destdn->mark_dirty(mdr->more()->pvmap[destdn], mdr->ls);
+ // in
+ if (in->is_auth())
+ in->pop_and_dirty_projected_inode(mdr->ls);
+ } else {
+ dout(10) << "merging remote onto primary link" << dendl;
+ oldin->pop_and_dirty_projected_inode(mdr->ls);
+ }
+ } else { // primary
+ if (linkmerge) {
+ dout(10) << "merging primary onto remote link" << dendl;
+ destdn->get_dir()->unlink_inode(destdn, false);
+ }
+ destdnl = destdn->pop_projected_linkage();
+ if (mdr->is_slave() && !mdr->more()->slave_update_journaled)
+ assert(!destdn->is_projected()); // no other projected
+
+ // srcdn inode import?
+ if (!srcdn->is_auth() && destdn->is_auth()) {
+ assert(mdr->more()->inode_import.length() > 0);
+
+ map<client_t,Capability::Import> imported_caps;
+
+ // finish cap imports
+ finish_force_open_sessions(mdr->more()->imported_client_map, mdr->more()->sseq_map);
+ if (mdr->more()->cap_imports.count(destdnl->get_inode())) {
+ mdcache->migrator->finish_import_inode_caps(destdnl->get_inode(),
+ mdr->more()->srcdn_auth_mds, true,
+ mdr->more()->cap_imports[destdnl->get_inode()],
+ imported_caps);
+ }
+
+ mdr->more()->inode_import.clear();
+ ::encode(imported_caps, mdr->more()->inode_import);
+
+ /* hack: add an auth pin for each xlock we hold. These were
+ * remote xlocks previously but now they're local and
+ * we're going to try and unpin when we xlock_finish. */
+ for (set<SimpleLock *>::iterator i = mdr->xlocks.begin();
+ i != mdr->xlocks.end();
+ ++i)
+ if ((*i)->get_parent() == destdnl->get_inode() &&
+ !(*i)->is_locallock())
+ mds->locker->xlock_import(*i);
+
+ // hack: fix auth bit
+ in->state_set(CInode::STATE_AUTH);
+
+ mdr->clear_ambiguous_auth();
+ }
+
+ if (destdn->is_auth()) {
+ in->pop_and_dirty_projected_inode(mdr->ls);
+
+ } else {
+ // FIXME: fix up snaprealm!
+ }
+ }
+
+ // src
+ if (srcdn->is_auth())
+ srcdn->mark_dirty(mdr->more()->pvmap[srcdn], mdr->ls);
+ srcdn->pop_projected_linkage();
+ if (mdr->is_slave() && !mdr->more()->slave_update_journaled)
+ assert(!srcdn->is_projected()); // no other projected
+
+ // apply remaining projected inodes (nested)
+ mdr->apply();
+
+ // update subtree map?
+ if (destdnl->is_primary() && in->is_dir())
+ mdcache->adjust_subtree_after_rename(in, srcdn->get_dir(), true);
+
+ if (straydn && oldin->is_dir())
+ mdcache->adjust_subtree_after_rename(oldin, destdn->get_dir(), true);
+
+ // removing a new dn?
+ if (srcdn->is_auth())
+ srcdn->get_dir()->try_remove_unlinked_dn(srcdn);
+}
+
+
+
+// ------------
+// SLAVE
+
+class C_MDS_SlaveRenamePrep : public ServerLogContext {
+ CDentry *srcdn, *destdn, *straydn;
+public:
+ C_MDS_SlaveRenamePrep(Server *s, MDRequestRef& m, CDentry *sr, CDentry *de, CDentry *st) :
+ ServerLogContext(s, m), srcdn(sr), destdn(de), straydn(st) {}
+ void finish(int r) override {
+ server->_logged_slave_rename(mdr, srcdn, destdn, straydn);
+ }
+};
+
+class C_MDS_SlaveRenameCommit : public ServerContext {
+ MDRequestRef mdr;
+ CDentry *srcdn, *destdn, *straydn;
+public:
+ C_MDS_SlaveRenameCommit(Server *s, MDRequestRef& m, CDentry *sr, CDentry *de, CDentry *st) :
+ ServerContext(s), mdr(m), srcdn(sr), destdn(de), straydn(st) {}
+ void finish(int r) override {
+ server->_commit_slave_rename(mdr, r, srcdn, destdn, straydn);
+ }
+};
+
+class C_MDS_SlaveRenameSessionsFlushed : public ServerContext {
+ MDRequestRef mdr;
+public:
+ C_MDS_SlaveRenameSessionsFlushed(Server *s, MDRequestRef& r) :
+ ServerContext(s), mdr(r) {}
+ void finish(int r) override {
+ server->_slave_rename_sessions_flushed(mdr);
+ }
+};
+
+/* This function DOES put the mdr->slave_request before returning*/
+void Server::handle_slave_rename_prep(MDRequestRef& mdr)
+{
+ dout(10) << "handle_slave_rename_prep " << *mdr
+ << " " << mdr->slave_request->srcdnpath
+ << " to " << mdr->slave_request->destdnpath
+ << dendl;
+
+ if (mdr->slave_request->is_interrupted()) {
+ dout(10) << " slave request interrupted, sending noop reply" << dendl;
+ MMDSSlaveRequest *reply= new MMDSSlaveRequest(mdr->reqid, mdr->attempt, MMDSSlaveRequest::OP_RENAMEPREPACK);
+ reply->mark_interrupted();
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ return;
+ }
+
+ // discover destdn
+ filepath destpath(mdr->slave_request->destdnpath);
+ dout(10) << " dest " << destpath << dendl;
+ vector<CDentry*> trace;
+ int r = mdcache->path_traverse(mdr, NULL, NULL, destpath, &trace, NULL, MDS_TRAVERSE_DISCOVERXLOCK);
+ if (r > 0) return;
+ if (r == -ESTALE) {
+ mdcache->find_ino_peers(destpath.get_ino(), new C_MDS_RetryRequest(mdcache, mdr),
+ mdr->slave_to_mds);
+ return;
+ }
+ assert(r == 0); // we shouldn't get an error here!
+
+ CDentry *destdn = trace[trace.size()-1];
+ CDentry::linkage_t *destdnl = destdn->get_projected_linkage();
+ dout(10) << " destdn " << *destdn << dendl;
+ mdr->pin(destdn);
+
+ // discover srcdn
+ filepath srcpath(mdr->slave_request->srcdnpath);
+ dout(10) << " src " << srcpath << dendl;
+ CInode *srci = nullptr;
+ r = mdcache->path_traverse(mdr, NULL, NULL, srcpath, &trace, &srci, MDS_TRAVERSE_DISCOVERXLOCK);
+ if (r > 0) return;
+ assert(r == 0);
+
+ // srcpath must not point to a null dentry
+ assert(srci != nullptr);
+
+ CDentry *srcdn = trace[trace.size()-1];
+ CDentry::linkage_t *srcdnl = srcdn->get_projected_linkage();
+ dout(10) << " srcdn " << *srcdn << dendl;
+ mdr->pin(srcdn);
+ mdr->pin(srci);
+
+ // stray?
+ bool linkmerge = (srcdnl->get_inode() == destdnl->get_inode() &&
+ (srcdnl->is_primary() || destdnl->is_primary()));
+ CDentry *straydn = mdr->straydn;
+ if (destdnl->is_primary() && !linkmerge)
+ assert(straydn);
+
+ mdr->set_op_stamp(mdr->slave_request->op_stamp);
+ mdr->more()->srcdn_auth_mds = srcdn->authority().first;
+
+ // set up commit waiter (early, to clean up any freezing etc we do)
+ if (!mdr->more()->slave_commit)
+ mdr->more()->slave_commit = new C_MDS_SlaveRenameCommit(this, mdr, srcdn, destdn, straydn);
+
+ // am i srcdn auth?
+ if (srcdn->is_auth()) {
+ set<mds_rank_t> srcdnrep;
+ srcdn->list_replicas(srcdnrep);
+
+ bool reply_witness = false;
+ if (srcdnl->is_primary() && !srcdnl->get_inode()->state_test(CInode::STATE_AMBIGUOUSAUTH)) {
+ // freeze?
+ // we need this to
+ // - avoid conflicting lock state changes
+ // - avoid concurrent updates to the inode
+ // (this could also be accomplished with the versionlock)
+ int allowance = 2; // 1 for the mdr auth_pin, 1 for the link lock
+ allowance += srcdnl->get_inode()->is_dir(); // for the snap lock
+ dout(10) << " freezing srci " << *srcdnl->get_inode() << " with allowance " << allowance << dendl;
+ bool frozen_inode = srcdnl->get_inode()->freeze_inode(allowance);
+
+ // unfreeze auth pin after freezing the inode to avoid queueing waiters
+ if (srcdnl->get_inode()->is_frozen_auth_pin())
+ mdr->unfreeze_auth_pin();
+
+ if (!frozen_inode) {
+ srcdnl->get_inode()->add_waiter(CInode::WAIT_FROZEN, new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+
+ /*
+ * set ambiguous auth for srci
+ * NOTE: we don't worry about ambiguous cache expire as we do
+ * with subtree migrations because all slaves will pin
+ * srcdn->get_inode() for duration of this rename.
+ */
+ mdr->set_ambiguous_auth(srcdnl->get_inode());
+
+ // just mark the source inode as ambiguous auth if more than two MDS are involved.
+ // the master will send another OP_RENAMEPREP slave request later.
+ if (mdr->slave_request->witnesses.size() > 1) {
+ dout(10) << " set srci ambiguous auth; providing srcdn replica list" << dendl;
+ reply_witness = true;
+ }
+
+ // make sure bystanders have received all lock related messages
+ for (set<mds_rank_t>::iterator p = srcdnrep.begin(); p != srcdnrep.end(); ++p) {
+ if (*p == mdr->slave_to_mds ||
+ (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(*p)))
+ continue;
+ MMDSSlaveRequest *notify = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_RENAMENOTIFY);
+ mds->send_message_mds(notify, *p);
+ mdr->more()->waiting_on_slave.insert(*p);
+ }
+
+ // make sure clients have received all cap related messages
+ set<client_t> export_client_set;
+ mdcache->migrator->get_export_client_set(srcdnl->get_inode(), export_client_set);
+
+ MDSGatherBuilder gather(g_ceph_context);
+ flush_client_sessions(export_client_set, gather);
+ if (gather.has_subs()) {
+ mdr->more()->waiting_on_slave.insert(MDS_RANK_NONE);
+ gather.set_finisher(new C_MDS_SlaveRenameSessionsFlushed(this, mdr));
+ gather.activate();
+ }
+ }
+
+ // is witness list sufficient?
+ for (set<mds_rank_t>::iterator p = srcdnrep.begin(); p != srcdnrep.end(); ++p) {
+ if (*p == mdr->slave_to_mds ||
+ mdr->slave_request->witnesses.count(*p)) continue;
+ dout(10) << " witness list insufficient; providing srcdn replica list" << dendl;
+ reply_witness = true;
+ break;
+ }
+
+ if (reply_witness) {
+ assert(!srcdnrep.empty());
+ MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_RENAMEPREPACK);
+ reply->witnesses.swap(srcdnrep);
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ return;
+ }
+ dout(10) << " witness list sufficient: includes all srcdn replicas" << dendl;
+ if (!mdr->more()->waiting_on_slave.empty()) {
+ dout(10) << " still waiting for rename notify acks from "
+ << mdr->more()->waiting_on_slave << dendl;
+ return;
+ }
+ } else if (srcdnl->is_primary() && srcdn->authority() != destdn->authority()) {
+ // set ambiguous auth for srci on witnesses
+ mdr->set_ambiguous_auth(srcdnl->get_inode());
+ }
+
+ // encode everything we'd need to roll this back... basically, just the original state.
+ rename_rollback rollback;
+
+ rollback.reqid = mdr->reqid;
+
+ rollback.orig_src.dirfrag = srcdn->get_dir()->dirfrag();
+ rollback.orig_src.dirfrag_old_mtime = srcdn->get_dir()->get_projected_fnode()->fragstat.mtime;
+ rollback.orig_src.dirfrag_old_rctime = srcdn->get_dir()->get_projected_fnode()->rstat.rctime;
+ rollback.orig_src.dname = srcdn->name;
+ if (srcdnl->is_primary())
+ rollback.orig_src.ino = srcdnl->get_inode()->ino();
+ else {
+ assert(srcdnl->is_remote());
+ rollback.orig_src.remote_ino = srcdnl->get_remote_ino();
+ rollback.orig_src.remote_d_type = srcdnl->get_remote_d_type();
+ }
+
+ rollback.orig_dest.dirfrag = destdn->get_dir()->dirfrag();
+ rollback.orig_dest.dirfrag_old_mtime = destdn->get_dir()->get_projected_fnode()->fragstat.mtime;
+ rollback.orig_dest.dirfrag_old_rctime = destdn->get_dir()->get_projected_fnode()->rstat.rctime;
+ rollback.orig_dest.dname = destdn->name;
+ if (destdnl->is_primary())
+ rollback.orig_dest.ino = destdnl->get_inode()->ino();
+ else if (destdnl->is_remote()) {
+ rollback.orig_dest.remote_ino = destdnl->get_remote_ino();
+ rollback.orig_dest.remote_d_type = destdnl->get_remote_d_type();
+ }
+
+ if (straydn) {
+ rollback.stray.dirfrag = straydn->get_dir()->dirfrag();
+ rollback.stray.dirfrag_old_mtime = straydn->get_dir()->get_projected_fnode()->fragstat.mtime;
+ rollback.stray.dirfrag_old_rctime = straydn->get_dir()->get_projected_fnode()->rstat.rctime;
+ rollback.stray.dname = straydn->name;
+ }
+ ::encode(rollback, mdr->more()->rollback_bl);
+ dout(20) << " rollback is " << mdr->more()->rollback_bl.length() << " bytes" << dendl;
+
+ // journal.
+ mdr->ls = mdlog->get_current_segment();
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rename_prep", mdr->reqid, mdr->slave_to_mds,
+ ESlaveUpdate::OP_PREPARE, ESlaveUpdate::RENAME);
+ mdlog->start_entry(le);
+ le->rollback = mdr->more()->rollback_bl;
+
+ bufferlist blah; // inode import data... obviously not used if we're the slave
+ _rename_prepare(mdr, &le->commit, &blah, srcdn, destdn, straydn);
+
+ if (le->commit.empty()) {
+ dout(10) << " empty metablob, skipping journal" << dendl;
+ mdlog->cancel_entry(le);
+ mdr->ls = NULL;
+ _logged_slave_rename(mdr, srcdn, destdn, straydn);
+ } else {
+ mdr->more()->slave_update_journaled = true;
+ submit_mdlog_entry(le, new C_MDS_SlaveRenamePrep(this, mdr, srcdn, destdn, straydn),
+ mdr, __func__);
+ mdlog->flush();
+ }
+}
+
+void Server::_logged_slave_rename(MDRequestRef& mdr,
+ CDentry *srcdn, CDentry *destdn, CDentry *straydn)
+{
+ dout(10) << "_logged_slave_rename " << *mdr << dendl;
+
+ // prepare ack
+ MMDSSlaveRequest *reply = NULL;
+ if (!mdr->aborted) {
+ reply= new MMDSSlaveRequest(mdr->reqid, mdr->attempt, MMDSSlaveRequest::OP_RENAMEPREPACK);
+ if (!mdr->more()->slave_update_journaled)
+ reply->mark_not_journaled();
+ }
+
+ CDentry::linkage_t *srcdnl = srcdn->get_linkage();
+ CDentry::linkage_t *destdnl = NULL;
+ //CDentry::linkage_t *straydnl = straydn ? straydn->get_linkage() : 0;
+
+ // export srci?
+ if (srcdn->is_auth() && srcdnl->is_primary()) {
+ // set export bounds for CInode::encode_export()
+ list<CDir*> bounds;
+ if (srcdnl->get_inode()->is_dir()) {
+ srcdnl->get_inode()->get_dirfrags(bounds);
+ for (list<CDir*>::iterator p = bounds.begin(); p != bounds.end(); ++p)
+ (*p)->state_set(CDir::STATE_EXPORTBOUND);
+ }
+
+ map<client_t,entity_inst_t> exported_client_map;
+ bufferlist inodebl;
+ mdcache->migrator->encode_export_inode(srcdnl->get_inode(), inodebl,
+ exported_client_map);
+
+ for (list<CDir*>::iterator p = bounds.begin(); p != bounds.end(); ++p)
+ (*p)->state_clear(CDir::STATE_EXPORTBOUND);
+
+ if (reply) {
+ ::encode(exported_client_map, reply->inode_export, mds->mdsmap->get_up_features());
+ reply->inode_export.claim_append(inodebl);
+ reply->inode_export_v = srcdnl->get_inode()->inode.version;
+ }
+
+ // remove mdr auth pin
+ mdr->auth_unpin(srcdnl->get_inode());
+ mdr->more()->is_inode_exporter = true;
+
+ if (srcdnl->get_inode()->is_dirty())
+ srcdnl->get_inode()->mark_clean();
+
+ dout(10) << " exported srci " << *srcdnl->get_inode() << dendl;
+ }
+
+ // apply
+ _rename_apply(mdr, srcdn, destdn, straydn);
+
+ destdnl = destdn->get_linkage();
+
+ // bump popularity
+ mds->balancer->hit_dir(mdr->get_mds_stamp(), srcdn->get_dir(), META_POP_IWR);
+ if (destdnl->get_inode() && destdnl->get_inode()->is_auth())
+ mds->balancer->hit_inode(mdr->get_mds_stamp(), destdnl->get_inode(),
+ META_POP_IWR);
+
+ // done.
+ mdr->slave_request->put();
+ mdr->slave_request = 0;
+ mdr->straydn = 0;
+
+ if (reply) {
+ mds->send_message_mds(reply, mdr->slave_to_mds);
+ } else {
+ assert(mdr->aborted);
+ dout(10) << " abort flag set, finishing" << dendl;
+ mdcache->request_finish(mdr);
+ }
+}
+
+void Server::_commit_slave_rename(MDRequestRef& mdr, int r,
+ CDentry *srcdn, CDentry *destdn, CDentry *straydn)
+{
+ dout(10) << "_commit_slave_rename " << *mdr << " r=" << r << dendl;
+
+ CDentry::linkage_t *destdnl = destdn->get_linkage();
+
+ list<MDSInternalContextBase*> finished;
+ if (r == 0) {
+ // unfreeze+singleauth inode
+ // hmm, do i really need to delay this?
+ if (mdr->more()->is_inode_exporter) {
+
+ CInode *in = destdnl->get_inode();
+
+ // drop our pins
+ // we exported, clear out any xlocks that we moved to another MDS
+ set<SimpleLock*>::iterator i = mdr->xlocks.begin();
+ while (i != mdr->xlocks.end()) {
+ SimpleLock *lock = *i++;
+
+ // we only care about xlocks on the exported inode
+ if (lock->get_parent() == in &&
+ !lock->is_locallock())
+ mds->locker->xlock_export(lock, mdr.get());
+ }
+
+ map<client_t,Capability::Import> peer_imported;
+ bufferlist::iterator bp = mdr->more()->inode_import.begin();
+ ::decode(peer_imported, bp);
+
+ dout(10) << " finishing inode export on " << *destdnl->get_inode() << dendl;
+ mdcache->migrator->finish_export_inode(destdnl->get_inode(),
+ mdr->get_mds_stamp(),
+ mdr->slave_to_mds, peer_imported, finished);
+ mds->queue_waiters(finished); // this includes SINGLEAUTH waiters.
+
+ // unfreeze
+ assert(destdnl->get_inode()->is_frozen_inode());
+ destdnl->get_inode()->unfreeze_inode(finished);
+ }
+
+ // singleauth
+ if (mdr->more()->is_ambiguous_auth) {
+ mdr->more()->rename_inode->clear_ambiguous_auth(finished);
+ mdr->more()->is_ambiguous_auth = false;
+ }
+
+ if (straydn && mdr->more()->slave_update_journaled) {
+ CInode *strayin = straydn->get_projected_linkage()->get_inode();
+ if (strayin && !strayin->snaprealm)
+ mdcache->clear_dirty_bits_for_stray(strayin);
+ }
+
+ mds->queue_waiters(finished);
+ mdr->cleanup();
+
+ if (mdr->more()->slave_update_journaled) {
+ // write a commit to the journal
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rename_commit", mdr->reqid,
+ mdr->slave_to_mds, ESlaveUpdate::OP_COMMIT,
+ ESlaveUpdate::RENAME);
+ mdlog->start_entry(le);
+ submit_mdlog_entry(le, new C_MDS_CommittedSlave(this, mdr), mdr, __func__);
+ mdlog->flush();
+ } else {
+ _committed_slave(mdr);
+ }
+ } else {
+
+ // abort
+ // rollback_bl may be empty if we froze the inode but had to provide an expanded
+ // witness list from the master, and they failed before we tried prep again.
+ if (mdr->more()->rollback_bl.length()) {
+ if (mdr->more()->is_inode_exporter) {
+ dout(10) << " reversing inode export of " << *destdnl->get_inode() << dendl;
+ destdnl->get_inode()->abort_export();
+ }
+ if (mdcache->is_ambiguous_slave_update(mdr->reqid, mdr->slave_to_mds)) {
+ mdcache->remove_ambiguous_slave_update(mdr->reqid, mdr->slave_to_mds);
+ // rollback but preserve the slave request
+ do_rename_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr, false);
+ mdr->more()->rollback_bl.clear();
+ } else
+ do_rename_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr, true);
+ } else {
+ dout(10) << " rollback_bl empty, not rollback back rename (master failed after getting extra witnesses?)" << dendl;
+ // singleauth
+ if (mdr->more()->is_ambiguous_auth) {
+ if (srcdn->is_auth())
+ mdr->more()->rename_inode->unfreeze_inode(finished);
+
+ mdr->more()->rename_inode->clear_ambiguous_auth(finished);
+ mdr->more()->is_ambiguous_auth = false;
+ }
+ mds->queue_waiters(finished);
+ mdcache->request_finish(mdr);
+ }
+ }
+}
+
+void _rollback_repair_dir(MutationRef& mut, CDir *dir, rename_rollback::drec &r, utime_t ctime,
+ bool isdir, int linkunlink, nest_info_t &rstat)
+{
+ fnode_t *pf;
+ pf = dir->project_fnode();
+ mut->add_projected_fnode(dir);
+ pf->version = dir->pre_dirty();
+
+ if (isdir) {
+ pf->fragstat.nsubdirs += linkunlink;
+ } else {
+ pf->fragstat.nfiles += linkunlink;
+ }
+ if (r.ino) {
+ pf->rstat.rbytes += linkunlink * rstat.rbytes;
+ pf->rstat.rfiles += linkunlink * rstat.rfiles;
+ pf->rstat.rsubdirs += linkunlink * rstat.rsubdirs;
+ pf->rstat.rsnaprealms += linkunlink * rstat.rsnaprealms;
+ }
+ if (pf->fragstat.mtime == ctime) {
+ pf->fragstat.mtime = r.dirfrag_old_mtime;
+ if (pf->rstat.rctime == ctime)
+ pf->rstat.rctime = r.dirfrag_old_rctime;
+ }
+ mut->add_updated_lock(&dir->get_inode()->filelock);
+ mut->add_updated_lock(&dir->get_inode()->nestlock);
+}
+
+struct C_MDS_LoggedRenameRollback : public ServerLogContext {
+ MutationRef mut;
+ CDentry *srcdn;
+ version_t srcdnpv;
+ CDentry *destdn;
+ CDentry *straydn;
+ bool finish_mdr;
+ C_MDS_LoggedRenameRollback(Server *s, MutationRef& m, MDRequestRef& r,
+ CDentry *sd, version_t pv, CDentry *dd,
+ CDentry *st, bool f) :
+ ServerLogContext(s, r), mut(m), srcdn(sd), srcdnpv(pv), destdn(dd),
+ straydn(st), finish_mdr(f) {}
+ void finish(int r) override {
+ server->_rename_rollback_finish(mut, mdr, srcdn, srcdnpv,
+ destdn, straydn, finish_mdr);
+ }
+};
+
+void Server::do_rename_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr,
+ bool finish_mdr)
+{
+ rename_rollback rollback;
+ bufferlist::iterator p = rbl.begin();
+ ::decode(rollback, p);
+
+ dout(10) << "do_rename_rollback on " << rollback.reqid << dendl;
+ // need to finish this update before sending resolve to claim the subtree
+ mdcache->add_rollback(rollback.reqid, master);
+
+ MutationRef mut(new MutationImpl(nullptr, utime_t(), rollback.reqid));
+ mut->ls = mds->mdlog->get_current_segment();
+
+ CDentry *srcdn = NULL;
+ CDir *srcdir = mdcache->get_dirfrag(rollback.orig_src.dirfrag);
+ if (!srcdir)
+ srcdir = mdcache->get_dirfrag(rollback.orig_src.dirfrag.ino, rollback.orig_src.dname);
+ if (srcdir) {
+ dout(10) << " srcdir " << *srcdir << dendl;
+ srcdn = srcdir->lookup(rollback.orig_src.dname);
+ if (srcdn) {
+ dout(10) << " srcdn " << *srcdn << dendl;
+ assert(srcdn->get_linkage()->is_null());
+ } else
+ dout(10) << " srcdn not found" << dendl;
+ } else
+ dout(10) << " srcdir not found" << dendl;
+
+ CDentry *destdn = NULL;
+ CDir *destdir = mdcache->get_dirfrag(rollback.orig_dest.dirfrag);
+ if (!destdir)
+ destdir = mdcache->get_dirfrag(rollback.orig_dest.dirfrag.ino, rollback.orig_dest.dname);
+ if (destdir) {
+ dout(10) << " destdir " << *destdir << dendl;
+ destdn = destdir->lookup(rollback.orig_dest.dname);
+ if (destdn)
+ dout(10) << " destdn " << *destdn << dendl;
+ else
+ dout(10) << " destdn not found" << dendl;
+ } else
+ dout(10) << " destdir not found" << dendl;
+
+ CInode *in = NULL;
+ if (rollback.orig_src.ino) {
+ in = mdcache->get_inode(rollback.orig_src.ino);
+ if (in && in->is_dir())
+ assert(srcdn && destdn);
+ } else
+ in = mdcache->get_inode(rollback.orig_src.remote_ino);
+
+ CDir *straydir = NULL;
+ CDentry *straydn = NULL;
+ if (rollback.stray.dirfrag.ino) {
+ straydir = mdcache->get_dirfrag(rollback.stray.dirfrag);
+ if (straydir) {
+ dout(10) << "straydir " << *straydir << dendl;
+ straydn = straydir->lookup(rollback.stray.dname);
+ if (straydn) {
+ dout(10) << " straydn " << *straydn << dendl;
+ assert(straydn->get_linkage()->is_primary());
+ } else
+ dout(10) << " straydn not found" << dendl;
+ } else
+ dout(10) << "straydir not found" << dendl;
+ }
+
+ CInode *target = NULL;
+ if (rollback.orig_dest.ino) {
+ target = mdcache->get_inode(rollback.orig_dest.ino);
+ if (target)
+ assert(destdn && straydn);
+ } else if (rollback.orig_dest.remote_ino)
+ target = mdcache->get_inode(rollback.orig_dest.remote_ino);
+
+ // can't use is_auth() in the resolve stage
+ mds_rank_t whoami = mds->get_nodeid();
+ // slave
+ assert(!destdn || destdn->authority().first != whoami);
+ assert(!straydn || straydn->authority().first != whoami);
+
+ bool force_journal_src = false;
+ bool force_journal_dest = false;
+ if (in && in->is_dir() && srcdn->authority().first != whoami)
+ force_journal_src = _need_force_journal(in, false);
+ if (in && target && target->is_dir())
+ force_journal_dest = _need_force_journal(in, true);
+
+ version_t srcdnpv = 0;
+ // repair src
+ if (srcdn) {
+ if (srcdn->authority().first == whoami)
+ srcdnpv = srcdn->pre_dirty();
+ if (rollback.orig_src.ino) {
+ assert(in);
+ srcdn->push_projected_linkage(in);
+ } else
+ srcdn->push_projected_linkage(rollback.orig_src.remote_ino,
+ rollback.orig_src.remote_d_type);
+ }
+
+ inode_t *pi = 0;
+ if (in) {
+ if (in->authority().first == whoami) {
+ pi = in->project_inode();
+ mut->add_projected_inode(in);
+ pi->version = in->pre_dirty();
+ } else
+ pi = in->get_projected_inode();
+ if (pi->ctime == rollback.ctime)
+ pi->ctime = rollback.orig_src.old_ctime;
+ }
+
+ if (srcdn && srcdn->authority().first == whoami) {
+ nest_info_t blah;
+ _rollback_repair_dir(mut, srcdir, rollback.orig_src, rollback.ctime,
+ in ? in->is_dir() : false, 1, pi ? pi->accounted_rstat : blah);
+ }
+
+ // repair dest
+ if (destdn) {
+ if (rollback.orig_dest.ino && target) {
+ destdn->push_projected_linkage(target);
+ } else if (rollback.orig_dest.remote_ino) {
+ destdn->push_projected_linkage(rollback.orig_dest.remote_ino,
+ rollback.orig_dest.remote_d_type);
+ } else {
+ // the dentry will be trimmed soon, it's ok to have wrong linkage
+ if (rollback.orig_dest.ino)
+ assert(mds->is_resolve());
+ destdn->push_projected_linkage();
+ }
+ }
+
+ if (straydn)
+ straydn->push_projected_linkage();
+
+ if (target) {
+ inode_t *ti = NULL;
+ if (target->authority().first == whoami) {
+ ti = target->project_inode();
+ mut->add_projected_inode(target);
+ ti->version = target->pre_dirty();
+ } else
+ ti = target->get_projected_inode();
+ if (ti->ctime == rollback.ctime)
+ ti->ctime = rollback.orig_dest.old_ctime;
+ if (MDS_INO_IS_STRAY(rollback.orig_src.dirfrag.ino)) {
+ if (MDS_INO_IS_STRAY(rollback.orig_dest.dirfrag.ino))
+ assert(!rollback.orig_dest.ino && !rollback.orig_dest.remote_ino);
+ else
+ assert(rollback.orig_dest.remote_ino &&
+ rollback.orig_dest.remote_ino == rollback.orig_src.ino);
+ } else
+ ti->nlink++;
+ }
+
+ if (srcdn)
+ dout(0) << " srcdn back to " << *srcdn << dendl;
+ if (in)
+ dout(0) << " srci back to " << *in << dendl;
+ if (destdn)
+ dout(0) << " destdn back to " << *destdn << dendl;
+ if (target)
+ dout(0) << " desti back to " << *target << dendl;
+
+ // journal it
+ ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rename_rollback", rollback.reqid, master,
+ ESlaveUpdate::OP_ROLLBACK, ESlaveUpdate::RENAME);
+ mdlog->start_entry(le);
+
+ if (srcdn && (srcdn->authority().first == whoami || force_journal_src)) {
+ le->commit.add_dir_context(srcdir);
+ if (rollback.orig_src.ino)
+ le->commit.add_primary_dentry(srcdn, 0, true);
+ else
+ le->commit.add_remote_dentry(srcdn, true);
+ }
+
+ if (!rollback.orig_src.ino && // remote linkage
+ in && in->authority().first == whoami) {
+ le->commit.add_dir_context(in->get_projected_parent_dir());
+ le->commit.add_primary_dentry(in->get_projected_parent_dn(), in, true);
+ }
+
+ if (force_journal_dest) {
+ assert(rollback.orig_dest.ino);
+ le->commit.add_dir_context(destdir);
+ le->commit.add_primary_dentry(destdn, 0, true);
+ }
+
+ // slave: no need to journal straydn
+
+ if (target && target != in && target->authority().first == whoami) {
+ assert(rollback.orig_dest.remote_ino);
+ le->commit.add_dir_context(target->get_projected_parent_dir());
+ le->commit.add_primary_dentry(target->get_projected_parent_dn(), target, true);
+ }
+
+ if (in && in->is_dir() && (srcdn->authority().first == whoami || force_journal_src)) {
+ dout(10) << " noting renamed dir ino " << in->ino() << " in metablob" << dendl;
+ le->commit.renamed_dirino = in->ino();
+ if (srcdn->authority().first == whoami) {
+ list<CDir*> ls;
+ in->get_dirfrags(ls);
+ for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) {
+ CDir *dir = *p;
+ if (!dir->is_auth())
+ le->commit.renamed_dir_frags.push_back(dir->get_frag());
+ }
+ dout(10) << " noting renamed dir open frags " << le->commit.renamed_dir_frags << dendl;
+ }
+ } else if (force_journal_dest) {
+ dout(10) << " noting rename target ino " << target->ino() << " in metablob" << dendl;
+ le->commit.renamed_dirino = target->ino();
+ }
+
+ if (target && target->is_dir()) {
+ assert(destdn);
+ mdcache->project_subtree_rename(target, straydir, destdir);
+ }
+
+ if (in && in->is_dir()) {
+ assert(srcdn);
+ mdcache->project_subtree_rename(in, destdir, srcdir);
+ }
+
+ if (mdr && !mdr->more()->slave_update_journaled) {
+ assert(le->commit.empty());
+ mdlog->cancel_entry(le);
+ mut->ls = NULL;
+ _rename_rollback_finish(mut, mdr, srcdn, srcdnpv, destdn, straydn, finish_mdr);
+ } else {
+ assert(!le->commit.empty());
+ if (mdr)
+ mdr->more()->slave_update_journaled = false;
+ MDSLogContextBase *fin = new C_MDS_LoggedRenameRollback(this, mut, mdr, srcdn, srcdnpv,
+ destdn, straydn, finish_mdr);
+ submit_mdlog_entry(le, fin, mdr, __func__);
+ mdlog->flush();
+ }
+}
+
+void Server::_rename_rollback_finish(MutationRef& mut, MDRequestRef& mdr, CDentry *srcdn,
+ version_t srcdnpv, CDentry *destdn,
+ CDentry *straydn, bool finish_mdr)
+{
+ dout(10) << "_rename_rollback_finish " << mut->reqid << dendl;
+
+ if (straydn) {
+ straydn->get_dir()->unlink_inode(straydn);
+ straydn->pop_projected_linkage();
+ }
+ if (destdn) {
+ destdn->get_dir()->unlink_inode(destdn);
+ destdn->pop_projected_linkage();
+ }
+ if (srcdn) {
+ srcdn->pop_projected_linkage();
+ if (srcdn->authority().first == mds->get_nodeid())
+ srcdn->mark_dirty(srcdnpv, mut->ls);
+ }
+
+ mut->apply();
+
+ if (srcdn && srcdn->get_linkage()->is_primary()) {
+ CInode *in = srcdn->get_linkage()->get_inode();
+ if (srcdn->authority().first == mds->get_nodeid())
+ in->state_set(CInode::STATE_AUTH);
+ // update subtree map?
+ if (in && in->is_dir()) {
+ assert(destdn);
+ mdcache->adjust_subtree_after_rename(in, destdn->get_dir(), true);
+ }
+ }
+
+ if (destdn) {
+ CInode *oldin = destdn->get_linkage()->get_inode();
+ // update subtree map?
+ if (oldin && oldin->is_dir()) {
+ assert(straydn);
+ mdcache->adjust_subtree_after_rename(oldin, straydn->get_dir(), true);
+ }
+ }
+
+ if (mds->is_resolve()) {
+ CDir *root = NULL;
+ if (straydn)
+ root = mdcache->get_subtree_root(straydn->get_dir());
+ else if (destdn)
+ root = mdcache->get_subtree_root(destdn->get_dir());
+ if (root)
+ mdcache->try_trim_non_auth_subtree(root);
+ }
+
+ if (mdr) {
+ list<MDSInternalContextBase*> finished;
+ if (mdr->more()->is_ambiguous_auth) {
+ if (srcdn->is_auth())
+ mdr->more()->rename_inode->unfreeze_inode(finished);
+
+ mdr->more()->rename_inode->clear_ambiguous_auth(finished);
+ mdr->more()->is_ambiguous_auth = false;
+ }
+ mds->queue_waiters(finished);
+ if (finish_mdr || mdr->aborted)
+ mdcache->request_finish(mdr);
+ else
+ mdr->more()->slave_rolling_back = false;
+ }
+
+ mdcache->finish_rollback(mut->reqid);
+
+ mut->cleanup();
+}
+
+/* This function DOES put the passed message before returning*/
+void Server::handle_slave_rename_prep_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack)
+{
+ dout(10) << "handle_slave_rename_prep_ack " << *mdr
+ << " witnessed by " << ack->get_source()
+ << " " << *ack << dendl;
+ mds_rank_t from = mds_rank_t(ack->get_source().num());
+
+ // note slave
+ mdr->more()->slaves.insert(from);
+ if (mdr->more()->srcdn_auth_mds == from &&
+ mdr->more()->is_remote_frozen_authpin &&
+ !mdr->more()->is_ambiguous_auth) {
+ mdr->set_ambiguous_auth(mdr->more()->rename_inode);
+ }
+
+ // witnessed? or add extra witnesses?
+ assert(mdr->more()->witnessed.count(from) == 0);
+ if (ack->is_interrupted()) {
+ dout(10) << " slave request interrupted, noop" << dendl;
+ } else if (ack->witnesses.empty()) {
+ mdr->more()->witnessed.insert(from);
+ if (!ack->is_not_journaled())
+ mdr->more()->has_journaled_slaves = true;
+ } else {
+ dout(10) << " extra witnesses (srcdn replicas) are " << ack->witnesses << dendl;
+ mdr->more()->extra_witnesses.swap(ack->witnesses);
+ mdr->more()->extra_witnesses.erase(mds->get_nodeid()); // not me!
+ }
+
+ // srci import?
+ if (ack->inode_export.length()) {
+ dout(10) << " got srci import" << dendl;
+ mdr->more()->inode_import.claim(ack->inode_export);
+ mdr->more()->inode_import_v = ack->inode_export_v;
+ }
+
+ // remove from waiting list
+ assert(mdr->more()->waiting_on_slave.count(from));
+ mdr->more()->waiting_on_slave.erase(from);
+
+ if (mdr->more()->waiting_on_slave.empty())
+ dispatch_client_request(mdr); // go again!
+ else
+ dout(10) << "still waiting on slaves " << mdr->more()->waiting_on_slave << dendl;
+}
+
+void Server::handle_slave_rename_notify_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack)
+{
+ dout(10) << "handle_slave_rename_notify_ack " << *mdr << " from mds."
+ << ack->get_source() << dendl;
+ assert(mdr->is_slave());
+ mds_rank_t from = mds_rank_t(ack->get_source().num());
+
+ if (mdr->more()->waiting_on_slave.count(from)) {
+ mdr->more()->waiting_on_slave.erase(from);
+
+ if (mdr->more()->waiting_on_slave.empty()) {
+ if (mdr->slave_request)
+ dispatch_slave_request(mdr);
+ } else
+ dout(10) << " still waiting for rename notify acks from "
+ << mdr->more()->waiting_on_slave << dendl;
+ }
+}
+
+void Server::_slave_rename_sessions_flushed(MDRequestRef& mdr)
+{
+ dout(10) << "_slave_rename_sessions_flushed " << *mdr << dendl;
+
+ if (mdr->more()->waiting_on_slave.count(MDS_RANK_NONE)) {
+ mdr->more()->waiting_on_slave.erase(MDS_RANK_NONE);
+
+ if (mdr->more()->waiting_on_slave.empty()) {
+ if (mdr->slave_request)
+ dispatch_slave_request(mdr);
+ } else
+ dout(10) << " still waiting for rename notify acks from "
+ << mdr->more()->waiting_on_slave << dendl;
+ }
+}
+
+// snaps
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_lssnap(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+
+ // traverse to path
+ CInode *diri = mdcache->get_inode(req->get_filepath().get_ino());
+ if (!diri || diri->state_test(CInode::STATE_PURGING)) {
+ respond_to_request(mdr, -ESTALE);
+ return;
+ }
+ if (!diri->is_auth()) {
+ mdcache->request_forward(mdr, diri->authority().first);
+ return;
+ }
+ if (!diri->is_dir()) {
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+ dout(10) << "lssnap on " << *diri << dendl;
+
+ // lock snap
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ mds->locker->include_snap_rdlocks(rdlocks, diri);
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_READ))
+ return;
+
+ SnapRealm *realm = diri->find_snaprealm();
+ map<snapid_t,SnapInfo*> infomap;
+ realm->get_snap_info(infomap, diri->get_oldest_snap());
+
+ unsigned max_entries = req->head.args.readdir.max_entries;
+ if (!max_entries)
+ max_entries = infomap.size();
+ int max_bytes = req->head.args.readdir.max_bytes;
+ if (!max_bytes)
+ // make sure at least one item can be encoded
+ max_bytes = (512 << 10) + g_conf->mds_max_xattr_pairs_size;
+
+ __u64 last_snapid = 0;
+ string offset_str = req->get_path2();
+ if (!offset_str.empty())
+ last_snapid = realm->resolve_snapname(offset_str, diri->ino());
+
+ bufferlist dirbl;
+ encode_empty_dirstat(dirbl);
+
+ max_bytes -= dirbl.length() - sizeof(__u32) + sizeof(__u8) * 2;
+
+ __u32 num = 0;
+ bufferlist dnbl;
+ map<snapid_t,SnapInfo*>::iterator p = infomap.upper_bound(last_snapid);
+ for (; p != infomap.end() && num < max_entries; ++p) {
+ dout(10) << p->first << " -> " << *p->second << dendl;
+
+ // actual
+ string snap_name;
+ if (p->second->ino == diri->ino())
+ snap_name = p->second->name;
+ else
+ snap_name = p->second->get_long_name();
+
+ unsigned start_len = dnbl.length();
+ if (int(start_len + snap_name.length() + sizeof(__u32) + sizeof(LeaseStat)) > max_bytes)
+ break;
+
+ ::encode(snap_name, dnbl);
+ encode_infinite_lease(dnbl);
+
+ int r = diri->encode_inodestat(dnbl, mdr->session, realm, p->first, max_bytes - (int)dnbl.length());
+ if (r < 0) {
+ bufferlist keep;
+ keep.substr_of(dnbl, 0, start_len);
+ dnbl.swap(keep);
+ break;
+ }
+ ++num;
+ }
+
+ ::encode(num, dirbl);
+ __u16 flags = 0;
+ if (p == infomap.end()) {
+ flags = CEPH_READDIR_FRAG_END;
+ if (last_snapid == 0)
+ flags |= CEPH_READDIR_FRAG_COMPLETE;
+ }
+ ::encode(flags, dirbl);
+ dirbl.claim_append(dnbl);
+
+ mdr->reply_extra_bl = dirbl;
+ mdr->tracei = diri;
+ respond_to_request(mdr, 0);
+}
+
+
+// MKSNAP
+
+struct C_MDS_mksnap_finish : public ServerLogContext {
+ CInode *diri;
+ SnapInfo info;
+ C_MDS_mksnap_finish(Server *s, MDRequestRef& r, CInode *di, SnapInfo &i) :
+ ServerLogContext(s, r), diri(di), info(i) {}
+ void finish(int r) override {
+ server->_mksnap_finish(mdr, diri, info);
+ }
+};
+
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_mksnap(MDRequestRef& mdr)
+{
+ if (!mds->mdsmap->allows_snaps()) {
+ // you can't make snapshots until you set an option right now
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ MClientRequest *req = mdr->client_request;
+ CInode *diri = mdcache->get_inode(req->get_filepath().get_ino());
+ if (!diri || diri->state_test(CInode::STATE_PURGING)) {
+ respond_to_request(mdr, -ESTALE);
+ return;
+ }
+
+ if (!diri->is_auth()) { // fw to auth?
+ mdcache->request_forward(mdr, diri->authority().first);
+ return;
+ }
+
+ // dir only
+ if (!diri->is_dir()) {
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+ if (diri->is_system() && !diri->is_root()) {
+ // no snaps in system dirs (root is ok)
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ const string &snapname = req->get_filepath().last_dentry();
+
+ if (mdr->client_request->get_caller_uid() < g_conf->mds_snap_min_uid || mdr->client_request->get_caller_uid() > g_conf->mds_snap_max_uid) {
+ dout(20) << "mksnap " << snapname << " on " << *diri << " denied to uid " << mdr->client_request->get_caller_uid() << dendl;
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ dout(10) << "mksnap " << snapname << " on " << *diri << dendl;
+
+ // lock snap
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ mds->locker->include_snap_rdlocks(rdlocks, diri);
+ rdlocks.erase(&diri->snaplock);
+ xlocks.insert(&diri->snaplock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+
+ // make sure name is unique
+ if (diri->snaprealm &&
+ diri->snaprealm->exists(snapname)) {
+ respond_to_request(mdr, -EEXIST);
+ return;
+ }
+ if (snapname.length() == 0 ||
+ snapname[0] == '_') {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ // allocate a snapid
+ if (!mdr->more()->stid) {
+ // prepare an stid
+ mds->snapclient->prepare_create(diri->ino(), snapname,
+ mdr->get_mds_stamp(),
+ &mdr->more()->stid, &mdr->more()->snapidbl,
+ new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+
+ version_t stid = mdr->more()->stid;
+ snapid_t snapid;
+ bufferlist::iterator p = mdr->more()->snapidbl.begin();
+ ::decode(snapid, p);
+ dout(10) << " stid " << stid << " snapid " << snapid << dendl;
+
+ // journal
+ SnapInfo info;
+ info.ino = diri->ino();
+ info.snapid = snapid;
+ info.name = snapname;
+ info.stamp = mdr->get_op_stamp();
+
+ inode_t *pi = diri->project_inode();
+ pi->ctime = info.stamp;
+ pi->version = diri->pre_dirty();
+
+ // project the snaprealm
+ sr_t *newsnap = diri->project_snaprealm(snapid);
+ newsnap->snaps[snapid] = info;
+ newsnap->seq = snapid;
+ newsnap->last_created = snapid;
+
+ // journal the inode changes
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "mksnap");
+ mdlog->start_entry(le);
+
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ le->metablob.add_table_transaction(TABLE_SNAP, stid);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, diri, 0, PREDIRTY_PRIMARY, false);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, diri);
+
+ // journal the snaprealm changes
+ submit_mdlog_entry(le, new C_MDS_mksnap_finish(this, mdr, diri, info),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_mksnap_finish(MDRequestRef& mdr, CInode *diri, SnapInfo &info)
+{
+ dout(10) << "_mksnap_finish " << *mdr << " " << info << dendl;
+
+ int op = (diri->snaprealm? CEPH_SNAP_OP_CREATE : CEPH_SNAP_OP_SPLIT);
+
+ diri->pop_and_dirty_projected_inode(mdr->ls);
+ mdr->apply();
+
+ mds->snapclient->commit(mdr->more()->stid, mdr->ls);
+
+ // create snap
+ dout(10) << "snaprealm now " << *diri->snaprealm << dendl;
+
+ mdcache->do_realm_invalidate_and_update_notify(diri, op);
+
+ // yay
+ mdr->in[0] = diri;
+ mdr->snapid = info.snapid;
+ mdr->tracei = diri;
+ respond_to_request(mdr, 0);
+}
+
+
+// RMSNAP
+
+struct C_MDS_rmsnap_finish : public ServerLogContext {
+ CInode *diri;
+ snapid_t snapid;
+ C_MDS_rmsnap_finish(Server *s, MDRequestRef& r, CInode *di, snapid_t sn) :
+ ServerLogContext(s, r), diri(di), snapid(sn) {}
+ void finish(int r) override {
+ server->_rmsnap_finish(mdr, diri, snapid);
+ }
+};
+
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_rmsnap(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+
+ CInode *diri = mdcache->get_inode(req->get_filepath().get_ino());
+ if (!diri || diri->state_test(CInode::STATE_PURGING)) {
+ respond_to_request(mdr, -ESTALE);
+ return;
+ }
+ if (!diri->is_auth()) { // fw to auth?
+ mdcache->request_forward(mdr, diri->authority().first);
+ return;
+ }
+ if (!diri->is_dir()) {
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+
+ const string &snapname = req->get_filepath().last_dentry();
+
+ if (mdr->client_request->get_caller_uid() < g_conf->mds_snap_min_uid || mdr->client_request->get_caller_uid() > g_conf->mds_snap_max_uid) {
+ dout(20) << "rmsnap " << snapname << " on " << *diri << " denied to uid " << mdr->client_request->get_caller_uid() << dendl;
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ dout(10) << "rmsnap " << snapname << " on " << *diri << dendl;
+
+ // does snap exist?
+ if (snapname.length() == 0 || snapname[0] == '_') {
+ respond_to_request(mdr, -EINVAL); // can't prune a parent snap, currently.
+ return;
+ }
+ if (!diri->snaprealm || !diri->snaprealm->exists(snapname)) {
+ respond_to_request(mdr, -ENOENT);
+ return;
+ }
+ snapid_t snapid = diri->snaprealm->resolve_snapname(snapname, diri->ino());
+ dout(10) << " snapname " << snapname << " is " << snapid << dendl;
+
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+ mds->locker->include_snap_rdlocks(rdlocks, diri);
+ rdlocks.erase(&diri->snaplock);
+ xlocks.insert(&diri->snaplock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+
+ // prepare
+ if (!mdr->more()->stid) {
+ mds->snapclient->prepare_destroy(diri->ino(), snapid,
+ &mdr->more()->stid, &mdr->more()->snapidbl,
+ new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+ version_t stid = mdr->more()->stid;
+ bufferlist::iterator p = mdr->more()->snapidbl.begin();
+ snapid_t seq;
+ ::decode(seq, p);
+ dout(10) << " stid is " << stid << ", seq is " << seq << dendl;
+
+ // journal
+ inode_t *pi = diri->project_inode();
+ pi->version = diri->pre_dirty();
+ pi->ctime = mdr->get_op_stamp();
+
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "rmsnap");
+ mdlog->start_entry(le);
+
+ // project the snaprealm
+ sr_t *newnode = diri->project_snaprealm();
+ newnode->snaps.erase(snapid);
+ newnode->seq = seq;
+ newnode->last_destroyed = seq;
+
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ le->metablob.add_table_transaction(TABLE_SNAP, stid);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, diri, 0, PREDIRTY_PRIMARY, false);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, diri);
+
+ submit_mdlog_entry(le, new C_MDS_rmsnap_finish(this, mdr, diri, snapid),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_rmsnap_finish(MDRequestRef& mdr, CInode *diri, snapid_t snapid)
+{
+ dout(10) << "_rmsnap_finish " << *mdr << " " << snapid << dendl;
+ snapid_t stid = mdr->more()->stid;
+ bufferlist::iterator p = mdr->more()->snapidbl.begin();
+ snapid_t seq;
+ ::decode(seq, p);
+
+ diri->pop_and_dirty_projected_inode(mdr->ls);
+ mdr->apply();
+
+ mds->snapclient->commit(stid, mdr->ls);
+
+ dout(10) << "snaprealm now " << *diri->snaprealm << dendl;
+
+ mdcache->do_realm_invalidate_and_update_notify(diri, CEPH_SNAP_OP_DESTROY);
+
+ // yay
+ mdr->in[0] = diri;
+ respond_to_request(mdr, 0);
+
+ // purge snapshot data
+ if (diri->snaprealm->have_past_parents_open())
+ diri->purge_stale_snap_data(diri->snaprealm->get_snaps());
+}
+
+struct C_MDS_renamesnap_finish : public ServerLogContext {
+ CInode *diri;
+ snapid_t snapid;
+ C_MDS_renamesnap_finish(Server *s, MDRequestRef& r, CInode *di, snapid_t sn) :
+ ServerLogContext(s, r), diri(di), snapid(sn) {}
+ void finish(int r) override {
+ server->_renamesnap_finish(mdr, diri, snapid);
+ }
+};
+
+/* This function takes responsibility for the passed mdr*/
+void Server::handle_client_renamesnap(MDRequestRef& mdr)
+{
+ MClientRequest *req = mdr->client_request;
+ if (req->get_filepath().get_ino() != req->get_filepath2().get_ino()) {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+
+ CInode *diri = mdcache->get_inode(req->get_filepath().get_ino());
+ if (!diri || diri->state_test(CInode::STATE_PURGING)) {
+ respond_to_request(mdr, -ESTALE);
+ return;
+ }
+
+ if (!diri->is_auth()) { // fw to auth?
+ mdcache->request_forward(mdr, diri->authority().first);
+ return;
+ }
+
+ if (!diri->is_dir()) { // dir only
+ respond_to_request(mdr, -ENOTDIR);
+ return;
+ }
+
+ if (mdr->client_request->get_caller_uid() < g_conf->mds_snap_min_uid ||
+ mdr->client_request->get_caller_uid() > g_conf->mds_snap_max_uid) {
+ respond_to_request(mdr, -EPERM);
+ return;
+ }
+
+ const string &dstname = req->get_filepath().last_dentry();
+ const string &srcname = req->get_filepath2().last_dentry();
+ dout(10) << "renamesnap " << srcname << "->" << dstname << " on " << *diri << dendl;
+
+ if (srcname.length() == 0 || srcname[0] == '_') {
+ respond_to_request(mdr, -EINVAL); // can't rename a parent snap.
+ return;
+ }
+ if (!diri->snaprealm || !diri->snaprealm->exists(srcname)) {
+ respond_to_request(mdr, -ENOENT);
+ return;
+ }
+ if (dstname.length() == 0 || dstname[0] == '_') {
+ respond_to_request(mdr, -EINVAL);
+ return;
+ }
+ if (diri->snaprealm->exists(dstname)) {
+ respond_to_request(mdr, -EEXIST);
+ return;
+ }
+
+ snapid_t snapid = diri->snaprealm->resolve_snapname(srcname, diri->ino());
+ dout(10) << " snapname " << srcname << " is " << snapid << dendl;
+
+ // lock snap
+ set<SimpleLock*> rdlocks, wrlocks, xlocks;
+
+ mds->locker->include_snap_rdlocks(rdlocks, diri);
+ rdlocks.erase(&diri->snaplock);
+ xlocks.insert(&diri->snaplock);
+
+ if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
+ return;
+
+ if (!check_access(mdr, diri, MAY_WRITE))
+ return;
+
+ // prepare
+ if (!mdr->more()->stid) {
+ mds->snapclient->prepare_update(diri->ino(), snapid, dstname, utime_t(),
+ &mdr->more()->stid, &mdr->more()->snapidbl,
+ new C_MDS_RetryRequest(mdcache, mdr));
+ return;
+ }
+
+ version_t stid = mdr->more()->stid;
+ bufferlist::iterator p = mdr->more()->snapidbl.begin();
+ snapid_t seq;
+ ::decode(seq, p);
+ dout(10) << " stid is " << stid << ", seq is " << seq << dendl;
+
+ // journal
+ inode_t *pi = diri->project_inode();
+ pi->ctime = mdr->get_op_stamp();
+ pi->version = diri->pre_dirty();
+
+ // project the snaprealm
+ sr_t *newsnap = diri->project_snaprealm();
+ assert(newsnap->snaps.count(snapid));
+ newsnap->snaps[snapid].name = dstname;
+
+ // journal the inode changes
+ mdr->ls = mdlog->get_current_segment();
+ EUpdate *le = new EUpdate(mdlog, "renamesnap");
+ mdlog->start_entry(le);
+
+ le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid());
+ le->metablob.add_table_transaction(TABLE_SNAP, stid);
+ mdcache->predirty_journal_parents(mdr, &le->metablob, diri, 0, PREDIRTY_PRIMARY, false);
+ mdcache->journal_dirty_inode(mdr.get(), &le->metablob, diri);
+
+ // journal the snaprealm changes
+ submit_mdlog_entry(le, new C_MDS_renamesnap_finish(this, mdr, diri, snapid),
+ mdr, __func__);
+ mdlog->flush();
+}
+
+void Server::_renamesnap_finish(MDRequestRef& mdr, CInode *diri, snapid_t snapid)
+{
+ dout(10) << "_renamesnap_finish " << *mdr << " " << snapid << dendl;
+
+ diri->pop_and_dirty_projected_inode(mdr->ls);
+ mdr->apply();
+
+ mds->snapclient->commit(mdr->more()->stid, mdr->ls);
+
+ dout(10) << "snaprealm now " << *diri->snaprealm << dendl;
+
+ mdcache->do_realm_invalidate_and_update_notify(diri, CEPH_SNAP_OP_UPDATE, true);
+
+ // yay
+ mdr->in[0] = diri;
+ mdr->tracei = diri;
+ mdr->snapid = snapid;
+ respond_to_request(mdr, 0);
+}
+
+/**
+ * Return true if server is in state RECONNECT and this
+ * client has not yet reconnected.
+ */
+bool Server::waiting_for_reconnect(client_t c) const
+{
+ return client_reconnect_gather.count(c) > 0;
+}
+
+void Server::dump_reconnect_status(Formatter *f) const
+{
+ f->open_object_section("reconnect_status");
+ f->dump_stream("client_reconnect_gather") << client_reconnect_gather;
+ f->close_section();
+}
Code Review / stor4nfv.git / blobdiff