--- /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) 2015 Red Hat
+ *
+ * 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 "common/debug.h"
+#include "common/errno.h"
+
+#include "messages/MClientRequestForward.h"
+#include "messages/MMDSLoadTargets.h"
+#include "messages/MMDSMap.h"
+#include "messages/MMDSTableRequest.h"
+#include "messages/MCommand.h"
+#include "messages/MCommandReply.h"
+
+#include "MDSDaemon.h"
+#include "MDSMap.h"
+#include "SnapClient.h"
+#include "SnapServer.h"
+#include "MDBalancer.h"
+#include "Locker.h"
+#include "Server.h"
+#include "InoTable.h"
+#include "mon/MonClient.h"
+#include "common/HeartbeatMap.h"
+#include "ScrubStack.h"
+
+
+#include "MDSRank.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_mds
+#undef dout_prefix
+#define dout_prefix *_dout << "mds." << whoami << '.' << incarnation << ' '
+
+MDSRank::MDSRank(
+ mds_rank_t whoami_,
+ Mutex &mds_lock_,
+ LogChannelRef &clog_,
+ SafeTimer &timer_,
+ Beacon &beacon_,
+ MDSMap *& mdsmap_,
+ Messenger *msgr,
+ MonClient *monc_,
+ Context *respawn_hook_,
+ Context *suicide_hook_)
+ :
+ whoami(whoami_), incarnation(0),
+ mds_lock(mds_lock_), clog(clog_), timer(timer_),
+ mdsmap(mdsmap_),
+ objecter(new Objecter(g_ceph_context, msgr, monc_, nullptr, 0, 0)),
+ server(NULL), mdcache(NULL), locker(NULL), mdlog(NULL),
+ balancer(NULL), scrubstack(NULL),
+ damage_table(whoami_),
+ inotable(NULL), snapserver(NULL), snapclient(NULL),
+ sessionmap(this), logger(NULL), mlogger(NULL),
+ op_tracker(g_ceph_context, g_conf->mds_enable_op_tracker,
+ g_conf->osd_num_op_tracker_shard),
+ last_state(MDSMap::STATE_BOOT),
+ state(MDSMap::STATE_BOOT),
+ cluster_degraded(false), stopping(false),
+ purge_queue(g_ceph_context, whoami_,
+ mdsmap_->get_metadata_pool(), objecter,
+ new FunctionContext(
+ [this](int r){
+ // Purge Queue operates inside mds_lock when we're calling into
+ // it, and outside when in background, so must handle both cases.
+ if (mds_lock.is_locked_by_me()) {
+ damaged();
+ } else {
+ damaged_unlocked();
+ }
+ }
+ )
+ ),
+ progress_thread(this), dispatch_depth(0),
+ hb(NULL), last_tid(0), osd_epoch_barrier(0), beacon(beacon_),
+ mds_slow_req_count(0),
+ last_client_mdsmap_bcast(0),
+ messenger(msgr), monc(monc_),
+ respawn_hook(respawn_hook_),
+ suicide_hook(suicide_hook_),
+ standby_replaying(false)
+{
+ hb = g_ceph_context->get_heartbeat_map()->add_worker("MDSRank", pthread_self());
+
+ purge_queue.update_op_limit(*mdsmap);
+
+ objecter->unset_honor_osdmap_full();
+
+ finisher = new Finisher(msgr->cct);
+
+ mdcache = new MDCache(this, purge_queue);
+ mdlog = new MDLog(this);
+ balancer = new MDBalancer(this, messenger, monc);
+
+ scrubstack = new ScrubStack(mdcache, finisher);
+
+ inotable = new InoTable(this);
+ snapserver = new SnapServer(this, monc);
+ snapclient = new SnapClient(this);
+
+ server = new Server(this);
+ locker = new Locker(this, mdcache);
+
+ op_tracker.set_complaint_and_threshold(msgr->cct->_conf->mds_op_complaint_time,
+ msgr->cct->_conf->mds_op_log_threshold);
+ op_tracker.set_history_size_and_duration(msgr->cct->_conf->mds_op_history_size,
+ msgr->cct->_conf->mds_op_history_duration);
+}
+
+MDSRank::~MDSRank()
+{
+ if (hb) {
+ g_ceph_context->get_heartbeat_map()->remove_worker(hb);
+ }
+
+ if (scrubstack) { delete scrubstack; scrubstack = NULL; }
+ if (mdcache) { delete mdcache; mdcache = NULL; }
+ if (mdlog) { delete mdlog; mdlog = NULL; }
+ if (balancer) { delete balancer; balancer = NULL; }
+ if (inotable) { delete inotable; inotable = NULL; }
+ if (snapserver) { delete snapserver; snapserver = NULL; }
+ if (snapclient) { delete snapclient; snapclient = NULL; }
+ if (mdsmap) { delete mdsmap; mdsmap = 0; }
+
+ if (server) { delete server; server = 0; }
+ if (locker) { delete locker; locker = 0; }
+
+ if (logger) {
+ g_ceph_context->get_perfcounters_collection()->remove(logger);
+ delete logger;
+ logger = 0;
+ }
+ if (mlogger) {
+ g_ceph_context->get_perfcounters_collection()->remove(mlogger);
+ delete mlogger;
+ mlogger = 0;
+ }
+
+ delete finisher;
+ finisher = NULL;
+
+ delete suicide_hook;
+ suicide_hook = NULL;
+
+ delete respawn_hook;
+ respawn_hook = NULL;
+
+ delete objecter;
+ objecter = nullptr;
+}
+
+void MDSRankDispatcher::init()
+{
+ objecter->init();
+ messenger->add_dispatcher_head(objecter);
+
+ objecter->start();
+
+ update_log_config();
+ create_logger();
+
+ // Expose the OSDMap (already populated during MDS::init) to anyone
+ // who is interested in it.
+ handle_osd_map();
+
+ progress_thread.create("mds_rank_progr");
+
+ purge_queue.init();
+
+ finisher->start();
+}
+
+void MDSRank::update_targets(utime_t now)
+{
+ // get MonMap's idea of my export_targets
+ const set<mds_rank_t>& map_targets = mdsmap->get_mds_info(get_nodeid()).export_targets;
+
+ dout(20) << "updating export targets, currently " << map_targets.size() << " ranks are targets" << dendl;
+
+ bool send = false;
+ set<mds_rank_t> new_map_targets;
+
+ auto it = export_targets.begin();
+ while (it != export_targets.end()) {
+ mds_rank_t rank = it->first;
+ double val = it->second.get(now);
+ dout(20) << "export target mds." << rank << " value is " << val << " @ " << now << dendl;
+
+ if (val <= 0.01) {
+ dout(15) << "export target mds." << rank << " is no longer an export target" << dendl;
+ export_targets.erase(it++);
+ send = true;
+ continue;
+ }
+ if (!map_targets.count(rank)) {
+ dout(15) << "export target mds." << rank << " not in map's export_targets" << dendl;
+ send = true;
+ }
+ new_map_targets.insert(rank);
+ it++;
+ }
+ if (new_map_targets.size() < map_targets.size()) {
+ dout(15) << "export target map holds stale targets, sending update" << dendl;
+ send = true;
+ }
+
+ if (send) {
+ dout(15) << "updating export_targets, now " << new_map_targets.size() << " ranks are targets" << dendl;
+ MMDSLoadTargets* m = new MMDSLoadTargets(mds_gid_t(monc->get_global_id()), new_map_targets);
+ monc->send_mon_message(m);
+ }
+}
+
+void MDSRank::hit_export_target(utime_t now, mds_rank_t rank, double amount)
+{
+ double rate = g_conf->mds_bal_target_decay;
+ if (amount < 0.0) {
+ amount = 100.0/g_conf->mds_bal_target_decay; /* a good default for "i am trying to keep this export_target active" */
+ }
+ auto em = export_targets.emplace(std::piecewise_construct, std::forward_as_tuple(rank), std::forward_as_tuple(now, DecayRate(rate)));
+ if (em.second) {
+ dout(15) << "hit export target (new) " << amount << " @ " << now << dendl;
+ } else {
+ dout(15) << "hit export target " << amount << " @ " << now << dendl;
+ }
+ em.first->second.hit(now, amount);
+}
+
+void MDSRankDispatcher::tick()
+{
+ heartbeat_reset();
+
+ if (beacon.is_laggy()) {
+ dout(5) << "tick bailing out since we seem laggy" << dendl;
+ return;
+ }
+
+ check_ops_in_flight();
+
+ // Wake up thread in case we use to be laggy and have waiting_for_nolaggy
+ // messages to progress.
+ progress_thread.signal();
+
+ // make sure mds log flushes, trims periodically
+ mdlog->flush();
+
+ if (is_active() || is_stopping()) {
+ mdcache->trim();
+ mdcache->trim_client_leases();
+ mdcache->check_memory_usage();
+ mdlog->trim(); // NOT during recovery!
+ }
+
+ // log
+ mds_load_t load = balancer->get_load(ceph_clock_now());
+
+ if (logger) {
+ logger->set(l_mds_load_cent, 100 * load.mds_load());
+ logger->set(l_mds_dispatch_queue_len, messenger->get_dispatch_queue_len());
+ logger->set(l_mds_subtrees, mdcache->num_subtrees());
+
+ mdcache->log_stat();
+ }
+
+ // ...
+ if (is_clientreplay() || is_active() || is_stopping()) {
+ server->find_idle_sessions();
+ locker->tick();
+ }
+
+ if (is_reconnect())
+ server->reconnect_tick();
+
+ if (is_active()) {
+ balancer->tick();
+ mdcache->find_stale_fragment_freeze();
+ mdcache->migrator->find_stale_export_freeze();
+ if (snapserver)
+ snapserver->check_osd_map(false);
+ }
+
+ if (is_active() || is_stopping()) {
+ update_targets(ceph_clock_now());
+ }
+
+ // shut down?
+ if (is_stopping()) {
+ mdlog->trim();
+ if (mdcache->shutdown_pass()) {
+ uint64_t pq_progress = 0 ;
+ uint64_t pq_total = 0;
+ size_t pq_in_flight = 0;
+ if (!purge_queue.drain(&pq_progress, &pq_total, &pq_in_flight)) {
+ dout(7) << "shutdown_pass=true, but still waiting for purge queue"
+ << dendl;
+ // This takes unbounded time, so we must indicate progress
+ // to the administrator: we do it in a slightly imperfect way
+ // by sending periodic (tick frequency) clog messages while
+ // in this state.
+ clog->info() << "MDS rank " << whoami << " waiting for purge queue ("
+ << std::dec << pq_progress << "/" << pq_total << " " << pq_in_flight
+ << " files purging" << ")";
+ } else {
+ dout(7) << "shutdown_pass=true, finished w/ shutdown, moving to "
+ "down:stopped" << dendl;
+ stopping_done();
+ }
+ }
+ else {
+ dout(7) << "shutdown_pass=false" << dendl;
+ }
+ }
+
+ // Expose ourselves to Beacon to update health indicators
+ beacon.notify_health(this);
+}
+
+void MDSRankDispatcher::shutdown()
+{
+ // It should never be possible for shutdown to get called twice, because
+ // anyone picking up mds_lock checks if stopping is true and drops
+ // out if it is.
+ assert(stopping == false);
+ stopping = true;
+
+ dout(1) << __func__ << ": shutting down rank " << whoami << dendl;
+
+ timer.shutdown();
+
+ // MDLog has to shut down before the finisher, because some of its
+ // threads block on IOs that require finisher to complete.
+ mdlog->shutdown();
+
+ // shut down cache
+ mdcache->shutdown();
+
+ purge_queue.shutdown();
+
+ mds_lock.Unlock();
+ finisher->stop(); // no flushing
+ mds_lock.Lock();
+
+ if (objecter->initialized)
+ objecter->shutdown();
+
+ monc->shutdown();
+
+ op_tracker.on_shutdown();
+
+ progress_thread.shutdown();
+
+ // release mds_lock for finisher/messenger threads (e.g.
+ // MDSDaemon::ms_handle_reset called from Messenger).
+ mds_lock.Unlock();
+
+ // shut down messenger
+ messenger->shutdown();
+
+ mds_lock.Lock();
+
+ // Workaround unclean shutdown: HeartbeatMap will assert if
+ // worker is not removed (as we do in ~MDS), but ~MDS is not
+ // always called after suicide.
+ if (hb) {
+ g_ceph_context->get_heartbeat_map()->remove_worker(hb);
+ hb = NULL;
+ }
+}
+
+/**
+ * Helper for simple callbacks that call a void fn with no args.
+ */
+class C_MDS_VoidFn : public MDSInternalContext
+{
+ typedef void (MDSRank::*fn_ptr)();
+ protected:
+ fn_ptr fn;
+ public:
+ C_MDS_VoidFn(MDSRank *mds_, fn_ptr fn_)
+ : MDSInternalContext(mds_), fn(fn_)
+ {
+ assert(mds_);
+ assert(fn_);
+ }
+
+ void finish(int r) override
+ {
+ (mds->*fn)();
+ }
+};
+
+int64_t MDSRank::get_metadata_pool()
+{
+ return mdsmap->get_metadata_pool();
+}
+
+MDSTableClient *MDSRank::get_table_client(int t)
+{
+ switch (t) {
+ case TABLE_ANCHOR: return NULL;
+ case TABLE_SNAP: return snapclient;
+ default: ceph_abort();
+ }
+}
+
+MDSTableServer *MDSRank::get_table_server(int t)
+{
+ switch (t) {
+ case TABLE_ANCHOR: return NULL;
+ case TABLE_SNAP: return snapserver;
+ default: ceph_abort();
+ }
+}
+
+void MDSRank::suicide()
+{
+ if (suicide_hook) {
+ suicide_hook->complete(0);
+ suicide_hook = NULL;
+ }
+}
+
+void MDSRank::respawn()
+{
+ if (respawn_hook) {
+ respawn_hook->complete(0);
+ respawn_hook = NULL;
+ }
+}
+
+void MDSRank::damaged()
+{
+ assert(whoami != MDS_RANK_NONE);
+ assert(mds_lock.is_locked_by_me());
+
+ beacon.set_want_state(mdsmap, MDSMap::STATE_DAMAGED);
+ monc->flush_log(); // Flush any clog error from before we were called
+ beacon.notify_health(this); // Include latest status in our swan song
+ beacon.send_and_wait(g_conf->mds_mon_shutdown_timeout);
+
+ // It's okay if we timed out and the mon didn't get our beacon, because
+ // another daemon (or ourselves after respawn) will eventually take the
+ // rank and report DAMAGED again when it hits same problem we did.
+
+ respawn(); // Respawn into standby in case mon has other work for us
+}
+
+void MDSRank::damaged_unlocked()
+{
+ Mutex::Locker l(mds_lock);
+ damaged();
+}
+
+void MDSRank::handle_write_error(int err)
+{
+ if (err == -EBLACKLISTED) {
+ derr << "we have been blacklisted (fenced), respawning..." << dendl;
+ respawn();
+ return;
+ }
+
+ if (g_conf->mds_action_on_write_error >= 2) {
+ derr << "unhandled write error " << cpp_strerror(err) << ", suicide..." << dendl;
+ respawn();
+ } else if (g_conf->mds_action_on_write_error == 1) {
+ derr << "unhandled write error " << cpp_strerror(err) << ", force readonly..." << dendl;
+ mdcache->force_readonly();
+ } else {
+ // ignore;
+ derr << "unhandled write error " << cpp_strerror(err) << ", ignore..." << dendl;
+ }
+}
+
+void *MDSRank::ProgressThread::entry()
+{
+ Mutex::Locker l(mds->mds_lock);
+ while (true) {
+ while (!mds->stopping &&
+ mds->finished_queue.empty() &&
+ (mds->waiting_for_nolaggy.empty() || mds->beacon.is_laggy())) {
+ cond.Wait(mds->mds_lock);
+ }
+
+ if (mds->stopping) {
+ break;
+ }
+
+ mds->_advance_queues();
+ }
+
+ return NULL;
+}
+
+
+void MDSRank::ProgressThread::shutdown()
+{
+ assert(mds->mds_lock.is_locked_by_me());
+ assert(mds->stopping);
+
+ if (am_self()) {
+ // Stopping is set, we will fall out of our main loop naturally
+ } else {
+ // Kick the thread to notice mds->stopping, and join it
+ cond.Signal();
+ mds->mds_lock.Unlock();
+ if (is_started())
+ join();
+ mds->mds_lock.Lock();
+ }
+}
+
+bool MDSRankDispatcher::ms_dispatch(Message *m)
+{
+ bool ret;
+ inc_dispatch_depth();
+ ret = _dispatch(m, true);
+ dec_dispatch_depth();
+ return ret;
+}
+
+/* If this function returns true, it recognizes the message and has taken the
+ * reference. If it returns false, it has done neither. */
+bool MDSRank::_dispatch(Message *m, bool new_msg)
+{
+ if (is_stale_message(m)) {
+ m->put();
+ return true;
+ }
+
+ if (beacon.is_laggy()) {
+ dout(10) << " laggy, deferring " << *m << dendl;
+ waiting_for_nolaggy.push_back(m);
+ } else if (new_msg && !waiting_for_nolaggy.empty()) {
+ dout(10) << " there are deferred messages, deferring " << *m << dendl;
+ waiting_for_nolaggy.push_back(m);
+ } else {
+ if (!handle_deferrable_message(m)) {
+ dout(0) << "unrecognized message " << *m << dendl;
+ return false;
+ }
+
+ heartbeat_reset();
+ }
+
+ if (dispatch_depth > 1)
+ return true;
+
+ // finish any triggered contexts
+ _advance_queues();
+
+ if (beacon.is_laggy()) {
+ // We've gone laggy during dispatch, don't do any
+ // more housekeeping
+ return true;
+ }
+
+ // done with all client replayed requests?
+ if (is_clientreplay() &&
+ mdcache->is_open() &&
+ replay_queue.empty() &&
+ beacon.get_want_state() == MDSMap::STATE_CLIENTREPLAY) {
+ int num_requests = mdcache->get_num_client_requests();
+ dout(10) << " still have " << num_requests << " active replay requests" << dendl;
+ if (num_requests == 0)
+ clientreplay_done();
+ }
+
+ // hack: thrash exports
+ static utime_t start;
+ utime_t now = ceph_clock_now();
+ if (start == utime_t())
+ start = now;
+ /*double el = now - start;
+ if (el > 30.0 &&
+ el < 60.0)*/
+ for (int i=0; i<g_conf->mds_thrash_exports; i++) {
+ set<mds_rank_t> s;
+ if (!is_active()) break;
+ mdsmap->get_mds_set(s, MDSMap::STATE_ACTIVE);
+ if (s.size() < 2 || CInode::count() < 10)
+ break; // need peers for this to work.
+ if (mdcache->migrator->get_num_exporting() > g_conf->mds_thrash_exports * 5 ||
+ mdcache->migrator->get_export_queue_size() > g_conf->mds_thrash_exports * 10)
+ break;
+
+ dout(7) << "mds thrashing exports pass " << (i+1) << "/" << g_conf->mds_thrash_exports << dendl;
+
+ // pick a random dir inode
+ CInode *in = mdcache->hack_pick_random_inode();
+
+ list<CDir*> ls;
+ in->get_dirfrags(ls);
+ if (!ls.empty()) { // must be an open dir.
+ list<CDir*>::iterator p = ls.begin();
+ int n = rand() % ls.size();
+ while (n--)
+ ++p;
+ CDir *dir = *p;
+ if (!dir->get_parent_dir()) continue; // must be linked.
+ if (!dir->is_auth()) continue; // must be auth.
+
+ mds_rank_t dest;
+ do {
+ int k = rand() % s.size();
+ set<mds_rank_t>::iterator p = s.begin();
+ while (k--) ++p;
+ dest = *p;
+ } while (dest == whoami);
+ mdcache->migrator->export_dir_nicely(dir,dest);
+ }
+ }
+ // hack: thrash fragments
+ for (int i=0; i<g_conf->mds_thrash_fragments; i++) {
+ if (!is_active()) break;
+ if (mdcache->get_num_fragmenting_dirs() > 5 * g_conf->mds_thrash_fragments) break;
+ dout(7) << "mds thrashing fragments pass " << (i+1) << "/" << g_conf->mds_thrash_fragments << dendl;
+
+ // pick a random dir inode
+ CInode *in = mdcache->hack_pick_random_inode();
+
+ list<CDir*> ls;
+ in->get_dirfrags(ls);
+ if (ls.empty()) continue; // must be an open dir.
+ CDir *dir = ls.front();
+ if (!dir->get_parent_dir()) continue; // must be linked.
+ if (!dir->is_auth()) continue; // must be auth.
+ frag_t fg = dir->get_frag();
+ if (mdsmap->allows_dirfrags()) {
+ if ((fg == frag_t() || (rand() % (1 << fg.bits()) == 0))) {
+ mdcache->split_dir(dir, 1);
+ } else {
+ balancer->queue_merge(dir);
+ }
+ }
+ }
+
+ // hack: force hash root?
+ /*
+ if (false &&
+ mdcache->get_root() &&
+ mdcache->get_root()->dir &&
+ !(mdcache->get_root()->dir->is_hashed() ||
+ mdcache->get_root()->dir->is_hashing())) {
+ dout(0) << "hashing root" << dendl;
+ mdcache->migrator->hash_dir(mdcache->get_root()->dir);
+ }
+ */
+
+ update_mlogger();
+ return true;
+}
+
+void MDSRank::update_mlogger()
+{
+ if (mlogger) {
+ mlogger->set(l_mdm_ino, CInode::count());
+ mlogger->set(l_mdm_dir, CDir::count());
+ mlogger->set(l_mdm_dn, CDentry::count());
+ mlogger->set(l_mdm_cap, Capability::count());
+ mlogger->set(l_mdm_inoa, CInode::increments());
+ mlogger->set(l_mdm_inos, CInode::decrements());
+ mlogger->set(l_mdm_dira, CDir::increments());
+ mlogger->set(l_mdm_dirs, CDir::decrements());
+ mlogger->set(l_mdm_dna, CDentry::increments());
+ mlogger->set(l_mdm_dns, CDentry::decrements());
+ mlogger->set(l_mdm_capa, Capability::increments());
+ mlogger->set(l_mdm_caps, Capability::decrements());
+ mlogger->set(l_mdm_buf, buffer::get_total_alloc());
+ }
+}
+
+/*
+ * lower priority messages we defer if we seem laggy
+ */
+bool MDSRank::handle_deferrable_message(Message *m)
+{
+ int port = m->get_type() & 0xff00;
+
+ switch (port) {
+ case MDS_PORT_CACHE:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS);
+ mdcache->dispatch(m);
+ break;
+
+ case MDS_PORT_MIGRATOR:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS);
+ mdcache->migrator->dispatch(m);
+ break;
+
+ default:
+ switch (m->get_type()) {
+ // SERVER
+ case CEPH_MSG_CLIENT_SESSION:
+ case CEPH_MSG_CLIENT_RECONNECT:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_CLIENT);
+ // fall-thru
+ case CEPH_MSG_CLIENT_REQUEST:
+ server->dispatch(m);
+ break;
+ case MSG_MDS_SLAVE_REQUEST:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS);
+ server->dispatch(m);
+ break;
+
+ case MSG_MDS_HEARTBEAT:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS);
+ balancer->proc_message(m);
+ break;
+
+ case MSG_MDS_TABLE_REQUEST:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS);
+ {
+ MMDSTableRequest *req = static_cast<MMDSTableRequest*>(m);
+ if (req->op < 0) {
+ MDSTableClient *client = get_table_client(req->table);
+ client->handle_request(req);
+ } else {
+ MDSTableServer *server = get_table_server(req->table);
+ server->handle_request(req);
+ }
+ }
+ break;
+
+ case MSG_MDS_LOCK:
+ case MSG_MDS_INODEFILECAPS:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS);
+ locker->dispatch(m);
+ break;
+
+ case CEPH_MSG_CLIENT_CAPS:
+ case CEPH_MSG_CLIENT_CAPRELEASE:
+ case CEPH_MSG_CLIENT_LEASE:
+ ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_CLIENT);
+ locker->dispatch(m);
+ break;
+
+ default:
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/**
+ * Advance finished_queue and waiting_for_nolaggy.
+ *
+ * Usually drain both queues, but may not drain waiting_for_nolaggy
+ * if beacon is currently laggy.
+ */
+void MDSRank::_advance_queues()
+{
+ assert(mds_lock.is_locked_by_me());
+
+ while (!finished_queue.empty()) {
+ dout(7) << "mds has " << finished_queue.size() << " queued contexts" << dendl;
+ dout(10) << finished_queue << dendl;
+ list<MDSInternalContextBase*> ls;
+ ls.swap(finished_queue);
+ while (!ls.empty()) {
+ dout(10) << " finish " << ls.front() << dendl;
+ ls.front()->complete(0);
+ ls.pop_front();
+
+ heartbeat_reset();
+ }
+ }
+
+ while (!waiting_for_nolaggy.empty()) {
+ // stop if we're laggy now!
+ if (beacon.is_laggy())
+ break;
+
+ Message *old = waiting_for_nolaggy.front();
+ waiting_for_nolaggy.pop_front();
+
+ if (is_stale_message(old)) {
+ old->put();
+ } else {
+ dout(7) << " processing laggy deferred " << *old << dendl;
+ if (!handle_deferrable_message(old)) {
+ dout(0) << "unrecognized message " << *old << dendl;
+ old->put();
+ }
+ }
+
+ heartbeat_reset();
+ }
+}
+
+/**
+ * Call this when you take mds_lock, or periodically if you're going to
+ * hold the lock for a long time (e.g. iterating over clients/inodes)
+ */
+void MDSRank::heartbeat_reset()
+{
+ // Any thread might jump into mds_lock and call us immediately
+ // after a call to suicide() completes, in which case MDSRank::hb
+ // has been freed and we are a no-op.
+ if (!hb) {
+ assert(stopping);
+ return;
+ }
+
+ // NB not enabling suicide grace, because the mon takes care of killing us
+ // (by blacklisting us) when we fail to send beacons, and it's simpler to
+ // only have one way of dying.
+ g_ceph_context->get_heartbeat_map()->reset_timeout(hb, g_conf->mds_beacon_grace, 0);
+}
+
+bool MDSRank::is_stale_message(Message *m) const
+{
+ // from bad mds?
+ if (m->get_source().is_mds()) {
+ mds_rank_t from = mds_rank_t(m->get_source().num());
+ if (!mdsmap->have_inst(from) ||
+ mdsmap->get_inst(from) != m->get_source_inst() ||
+ mdsmap->is_down(from)) {
+ // bogus mds?
+ if (m->get_type() == CEPH_MSG_MDS_MAP) {
+ dout(5) << "got " << *m << " from old/bad/imposter mds " << m->get_source()
+ << ", but it's an mdsmap, looking at it" << dendl;
+ } else if (m->get_type() == MSG_MDS_CACHEEXPIRE &&
+ mdsmap->get_inst(from) == m->get_source_inst()) {
+ dout(5) << "got " << *m << " from down mds " << m->get_source()
+ << ", but it's a cache_expire, looking at it" << dendl;
+ } else {
+ dout(5) << "got " << *m << " from down/old/bad/imposter mds " << m->get_source()
+ << ", dropping" << dendl;
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+
+void MDSRank::send_message(Message *m, Connection *c)
+{
+ assert(c);
+ c->send_message(m);
+}
+
+
+void MDSRank::send_message_mds(Message *m, mds_rank_t mds)
+{
+ if (!mdsmap->is_up(mds)) {
+ dout(10) << "send_message_mds mds." << mds << " not up, dropping " << *m << dendl;
+ m->put();
+ return;
+ }
+
+ // send mdsmap first?
+ if (mds != whoami && peer_mdsmap_epoch[mds] < mdsmap->get_epoch()) {
+ messenger->send_message(new MMDSMap(monc->get_fsid(), mdsmap),
+ mdsmap->get_inst(mds));
+ peer_mdsmap_epoch[mds] = mdsmap->get_epoch();
+ }
+
+ // send message
+ messenger->send_message(m, mdsmap->get_inst(mds));
+}
+
+void MDSRank::forward_message_mds(Message *m, mds_rank_t mds)
+{
+ assert(mds != whoami);
+
+ // client request?
+ if (m->get_type() == CEPH_MSG_CLIENT_REQUEST &&
+ (static_cast<MClientRequest*>(m))->get_source().is_client()) {
+ MClientRequest *creq = static_cast<MClientRequest*>(m);
+ creq->inc_num_fwd(); // inc forward counter
+
+ /*
+ * don't actually forward if non-idempotent!
+ * client has to do it. although the MDS will ignore duplicate requests,
+ * the affected metadata may migrate, in which case the new authority
+ * won't have the metareq_id in the completed request map.
+ */
+ // NEW: always make the client resend!
+ bool client_must_resend = true; //!creq->can_forward();
+
+ // tell the client where it should go
+ messenger->send_message(new MClientRequestForward(creq->get_tid(), mds, creq->get_num_fwd(),
+ client_must_resend),
+ creq->get_source_inst());
+
+ if (client_must_resend) {
+ m->put();
+ return;
+ }
+ }
+
+ // these are the only types of messages we should be 'forwarding'; they
+ // explicitly encode their source mds, which gets clobbered when we resend
+ // them here.
+ assert(m->get_type() == MSG_MDS_DIRUPDATE ||
+ m->get_type() == MSG_MDS_EXPORTDIRDISCOVER);
+
+ // send mdsmap first?
+ if (peer_mdsmap_epoch[mds] < mdsmap->get_epoch()) {
+ messenger->send_message(new MMDSMap(monc->get_fsid(), mdsmap),
+ mdsmap->get_inst(mds));
+ peer_mdsmap_epoch[mds] = mdsmap->get_epoch();
+ }
+
+ messenger->send_message(m, mdsmap->get_inst(mds));
+}
+
+
+
+void MDSRank::send_message_client_counted(Message *m, client_t client)
+{
+ Session *session = sessionmap.get_session(entity_name_t::CLIENT(client.v));
+ if (session) {
+ send_message_client_counted(m, session);
+ } else {
+ dout(10) << "send_message_client_counted no session for client." << client << " " << *m << dendl;
+ }
+}
+
+void MDSRank::send_message_client_counted(Message *m, Connection *connection)
+{
+ Session *session = static_cast<Session *>(connection->get_priv());
+ if (session) {
+ session->put(); // do not carry ref
+ send_message_client_counted(m, session);
+ } else {
+ dout(10) << "send_message_client_counted has no session for " << m->get_source_inst() << dendl;
+ // another Connection took over the Session
+ }
+}
+
+void MDSRank::send_message_client_counted(Message *m, Session *session)
+{
+ version_t seq = session->inc_push_seq();
+ dout(10) << "send_message_client_counted " << session->info.inst.name << " seq "
+ << seq << " " << *m << dendl;
+ if (session->connection) {
+ session->connection->send_message(m);
+ } else {
+ session->preopen_out_queue.push_back(m);
+ }
+}
+
+void MDSRank::send_message_client(Message *m, Session *session)
+{
+ dout(10) << "send_message_client " << session->info.inst << " " << *m << dendl;
+ if (session->connection) {
+ session->connection->send_message(m);
+ } else {
+ session->preopen_out_queue.push_back(m);
+ }
+}
+
+/**
+ * This is used whenever a RADOS operation has been cancelled
+ * or a RADOS client has been blacklisted, to cause the MDS and
+ * any clients to wait for this OSD epoch before using any new caps.
+ *
+ * See doc/cephfs/eviction
+ */
+void MDSRank::set_osd_epoch_barrier(epoch_t e)
+{
+ dout(4) << __func__ << ": epoch=" << e << dendl;
+ osd_epoch_barrier = e;
+}
+
+void MDSRank::retry_dispatch(Message *m)
+{
+ inc_dispatch_depth();
+ _dispatch(m, false);
+ dec_dispatch_depth();
+}
+
+utime_t MDSRank::get_laggy_until() const
+{
+ return beacon.get_laggy_until();
+}
+
+bool MDSRank::is_daemon_stopping() const
+{
+ return stopping;
+}
+
+void MDSRank::request_state(MDSMap::DaemonState s)
+{
+ dout(3) << "request_state " << ceph_mds_state_name(s) << dendl;
+ beacon.set_want_state(mdsmap, s);
+ beacon.send();
+}
+
+
+class C_MDS_BootStart : public MDSInternalContext {
+ MDSRank::BootStep nextstep;
+public:
+ C_MDS_BootStart(MDSRank *m, MDSRank::BootStep n)
+ : MDSInternalContext(m), nextstep(n) {}
+ void finish(int r) override {
+ mds->boot_start(nextstep, r);
+ }
+};
+
+
+void MDSRank::boot_start(BootStep step, int r)
+{
+ // Handle errors from previous step
+ if (r < 0) {
+ if (is_standby_replay() && (r == -EAGAIN)) {
+ dout(0) << "boot_start encountered an error EAGAIN"
+ << ", respawning since we fell behind journal" << dendl;
+ respawn();
+ } else if (r == -EINVAL || r == -ENOENT) {
+ // Invalid or absent data, indicates damaged on-disk structures
+ clog->error() << "Error loading MDS rank " << whoami << ": "
+ << cpp_strerror(r);
+ damaged();
+ assert(r == 0); // Unreachable, damaged() calls respawn()
+ } else {
+ // Completely unexpected error, give up and die
+ dout(0) << "boot_start encountered an error, failing" << dendl;
+ suicide();
+ return;
+ }
+ }
+
+ assert(is_starting() || is_any_replay());
+
+ switch(step) {
+ case MDS_BOOT_INITIAL:
+ {
+ mdcache->init_layouts();
+
+ MDSGatherBuilder gather(g_ceph_context,
+ new C_MDS_BootStart(this, MDS_BOOT_OPEN_ROOT));
+ dout(2) << "boot_start " << step << ": opening inotable" << dendl;
+ inotable->set_rank(whoami);
+ inotable->load(gather.new_sub());
+
+ dout(2) << "boot_start " << step << ": opening sessionmap" << dendl;
+ sessionmap.set_rank(whoami);
+ sessionmap.load(gather.new_sub());
+
+ dout(2) << "boot_start " << step << ": opening mds log" << dendl;
+ mdlog->open(gather.new_sub());
+
+ if (is_starting()) {
+ dout(2) << "boot_start " << step << ": opening purge queue" << dendl;
+ purge_queue.open(new C_IO_Wrapper(this, gather.new_sub()));
+ } else if (!standby_replaying) {
+ dout(2) << "boot_start " << step << ": opening purge queue (async)" << dendl;
+ purge_queue.open(NULL);
+ }
+
+ if (mdsmap->get_tableserver() == whoami) {
+ dout(2) << "boot_start " << step << ": opening snap table" << dendl;
+ snapserver->set_rank(whoami);
+ snapserver->load(gather.new_sub());
+ }
+
+ gather.activate();
+ }
+ break;
+ case MDS_BOOT_OPEN_ROOT:
+ {
+ dout(2) << "boot_start " << step << ": loading/discovering base inodes" << dendl;
+
+ MDSGatherBuilder gather(g_ceph_context,
+ new C_MDS_BootStart(this, MDS_BOOT_PREPARE_LOG));
+
+ mdcache->open_mydir_inode(gather.new_sub());
+
+ if (is_starting() ||
+ whoami == mdsmap->get_root()) { // load root inode off disk if we are auth
+ mdcache->open_root_inode(gather.new_sub());
+ } else {
+ // replay. make up fake root inode to start with
+ (void)mdcache->create_root_inode();
+ }
+ gather.activate();
+ }
+ break;
+ case MDS_BOOT_PREPARE_LOG:
+ if (is_any_replay()) {
+ dout(2) << "boot_start " << step << ": replaying mds log" << dendl;
+ MDSGatherBuilder gather(g_ceph_context,
+ new C_MDS_BootStart(this, MDS_BOOT_REPLAY_DONE));
+
+ if (!standby_replaying) {
+ dout(2) << "boot_start " << step << ": waiting for purge queue recovered" << dendl;
+ purge_queue.wait_for_recovery(new C_IO_Wrapper(this, gather.new_sub()));
+ }
+
+ mdlog->replay(gather.new_sub());
+ gather.activate();
+ } else {
+ dout(2) << "boot_start " << step << ": positioning at end of old mds log" << dendl;
+ mdlog->append();
+ starting_done();
+ }
+ break;
+ case MDS_BOOT_REPLAY_DONE:
+ assert(is_any_replay());
+
+ // Sessiontable and inotable should be in sync after replay, validate
+ // that they are consistent.
+ validate_sessions();
+
+ replay_done();
+ break;
+ }
+}
+
+void MDSRank::validate_sessions()
+{
+ assert(mds_lock.is_locked_by_me());
+ std::vector<Session*> victims;
+
+ // Identify any sessions which have state inconsistent with other,
+ // after they have been loaded from rados during startup.
+ // Mitigate bugs like: http://tracker.ceph.com/issues/16842
+ const auto &sessions = sessionmap.get_sessions();
+ for (const auto &i : sessions) {
+ Session *session = i.second;
+ interval_set<inodeno_t> badones;
+ if (inotable->intersects_free(session->info.prealloc_inos, &badones)) {
+ clog->error() << "Client session loaded with invalid preallocated "
+ "inodes, evicting session " << *session;
+
+ // Make the session consistent with inotable so that it can
+ // be cleanly torn down
+ session->info.prealloc_inos.subtract(badones);
+
+ victims.push_back(session);
+ }
+ }
+
+ for (const auto &session: victims) {
+ server->kill_session(session, nullptr);
+ }
+}
+
+void MDSRank::starting_done()
+{
+ dout(3) << "starting_done" << dendl;
+ assert(is_starting());
+ request_state(MDSMap::STATE_ACTIVE);
+
+ mdcache->open_root();
+
+ if (mdcache->is_open()) {
+ mdlog->start_new_segment();
+ } else {
+ mdcache->wait_for_open(new MDSInternalContextWrapper(this,
+ new FunctionContext([this] (int r) {
+ mdlog->start_new_segment();
+ })));
+ }
+}
+
+
+void MDSRank::calc_recovery_set()
+{
+ // initialize gather sets
+ set<mds_rank_t> rs;
+ mdsmap->get_recovery_mds_set(rs);
+ rs.erase(whoami);
+ mdcache->set_recovery_set(rs);
+
+ dout(1) << " recovery set is " << rs << dendl;
+}
+
+
+void MDSRank::replay_start()
+{
+ dout(1) << "replay_start" << dendl;
+
+ if (is_standby_replay())
+ standby_replaying = true;
+
+ calc_recovery_set();
+
+ // Check if we need to wait for a newer OSD map before starting
+ Context *fin = new C_IO_Wrapper(this, new C_MDS_BootStart(this, MDS_BOOT_INITIAL));
+ bool const ready = objecter->wait_for_map(
+ mdsmap->get_last_failure_osd_epoch(),
+ fin);
+
+ if (ready) {
+ delete fin;
+ boot_start();
+ } else {
+ dout(1) << " waiting for osdmap " << mdsmap->get_last_failure_osd_epoch()
+ << " (which blacklists prior instance)" << dendl;
+ }
+}
+
+
+class MDSRank::C_MDS_StandbyReplayRestartFinish : public MDSIOContext {
+ uint64_t old_read_pos;
+public:
+ C_MDS_StandbyReplayRestartFinish(MDSRank *mds_, uint64_t old_read_pos_) :
+ MDSIOContext(mds_), old_read_pos(old_read_pos_) {}
+ void finish(int r) override {
+ mds->_standby_replay_restart_finish(r, old_read_pos);
+ }
+};
+
+void MDSRank::_standby_replay_restart_finish(int r, uint64_t old_read_pos)
+{
+ if (old_read_pos < mdlog->get_journaler()->get_trimmed_pos()) {
+ dout(0) << "standby MDS fell behind active MDS journal's expire_pos, restarting" << dendl;
+ respawn(); /* we're too far back, and this is easier than
+ trying to reset everything in the cache, etc */
+ } else {
+ mdlog->standby_trim_segments();
+ boot_start(MDS_BOOT_PREPARE_LOG, r);
+ }
+}
+
+class MDSRank::C_MDS_StandbyReplayRestart : public MDSInternalContext {
+public:
+ explicit C_MDS_StandbyReplayRestart(MDSRank *m) : MDSInternalContext(m) {}
+ void finish(int r) override {
+ assert(!r);
+ mds->standby_replay_restart();
+ }
+};
+
+void MDSRank::standby_replay_restart()
+{
+ if (standby_replaying) {
+ /* Go around for another pass of replaying in standby */
+ dout(4) << "standby_replay_restart (as standby)" << dendl;
+ mdlog->get_journaler()->reread_head_and_probe(
+ new C_MDS_StandbyReplayRestartFinish(
+ this,
+ mdlog->get_journaler()->get_read_pos()));
+ } else {
+ /* We are transitioning out of standby: wait for OSD map update
+ before making final pass */
+ dout(1) << "standby_replay_restart (final takeover pass)" << dendl;
+ Context *fin = new C_IO_Wrapper(this, new C_MDS_StandbyReplayRestart(this));
+ bool ready = objecter->wait_for_map(mdsmap->get_last_failure_osd_epoch(), fin);
+ if (ready) {
+ delete fin;
+ mdlog->get_journaler()->reread_head_and_probe(
+ new C_MDS_StandbyReplayRestartFinish(
+ this,
+ mdlog->get_journaler()->get_read_pos()));
+
+ dout(1) << " opening purge queue (async)" << dendl;
+ purge_queue.open(NULL);
+ } else {
+ dout(1) << " waiting for osdmap " << mdsmap->get_last_failure_osd_epoch()
+ << " (which blacklists prior instance)" << dendl;
+ }
+ }
+}
+
+void MDSRank::replay_done()
+{
+ dout(1) << "replay_done" << (standby_replaying ? " (as standby)" : "") << dendl;
+
+ if (is_standby_replay()) {
+ // The replay was done in standby state, and we are still in that state
+ assert(standby_replaying);
+ dout(10) << "setting replay timer" << dendl;
+ timer.add_event_after(g_conf->mds_replay_interval,
+ new C_MDS_StandbyReplayRestart(this));
+ return;
+ } else if (standby_replaying) {
+ // The replay was done in standby state, we have now _left_ that state
+ dout(10) << " last replay pass was as a standby; making final pass" << dendl;
+ standby_replaying = false;
+ standby_replay_restart();
+ return;
+ } else {
+ // Replay is complete, journal read should be up to date
+ assert(mdlog->get_journaler()->get_read_pos() == mdlog->get_journaler()->get_write_pos());
+ assert(!is_standby_replay());
+
+ // Reformat and come back here
+ if (mdlog->get_journaler()->get_stream_format() < g_conf->mds_journal_format) {
+ dout(4) << "reformatting journal on standbyreplay->replay transition" << dendl;
+ mdlog->reopen(new C_MDS_BootStart(this, MDS_BOOT_REPLAY_DONE));
+ return;
+ }
+ }
+
+ dout(1) << "making mds journal writeable" << dendl;
+ mdlog->get_journaler()->set_writeable();
+ mdlog->get_journaler()->trim_tail();
+
+ if (g_conf->mds_wipe_sessions) {
+ dout(1) << "wiping out client sessions" << dendl;
+ sessionmap.wipe();
+ sessionmap.save(new C_MDSInternalNoop);
+ }
+ if (g_conf->mds_wipe_ino_prealloc) {
+ dout(1) << "wiping out ino prealloc from sessions" << dendl;
+ sessionmap.wipe_ino_prealloc();
+ sessionmap.save(new C_MDSInternalNoop);
+ }
+ if (g_conf->mds_skip_ino) {
+ inodeno_t i = g_conf->mds_skip_ino;
+ dout(1) << "skipping " << i << " inodes" << dendl;
+ inotable->skip_inos(i);
+ inotable->save(new C_MDSInternalNoop);
+ }
+
+ if (mdsmap->get_num_in_mds() == 1 &&
+ mdsmap->get_num_failed_mds() == 0) { // just me!
+ dout(2) << "i am alone, moving to state reconnect" << dendl;
+ request_state(MDSMap::STATE_RECONNECT);
+ } else {
+ dout(2) << "i am not alone, moving to state resolve" << dendl;
+ request_state(MDSMap::STATE_RESOLVE);
+ }
+}
+
+void MDSRank::reopen_log()
+{
+ dout(1) << "reopen_log" << dendl;
+ mdcache->rollback_uncommitted_fragments();
+}
+
+
+void MDSRank::resolve_start()
+{
+ dout(1) << "resolve_start" << dendl;
+
+ reopen_log();
+
+ mdcache->resolve_start(new C_MDS_VoidFn(this, &MDSRank::resolve_done));
+ finish_contexts(g_ceph_context, waiting_for_resolve);
+}
+void MDSRank::resolve_done()
+{
+ dout(1) << "resolve_done" << dendl;
+ request_state(MDSMap::STATE_RECONNECT);
+}
+
+void MDSRank::reconnect_start()
+{
+ dout(1) << "reconnect_start" << dendl;
+
+ if (last_state == MDSMap::STATE_REPLAY) {
+ reopen_log();
+ }
+
+ // Drop any blacklisted clients from the SessionMap before going
+ // into reconnect, so that we don't wait for them.
+ objecter->enable_blacklist_events();
+ std::set<entity_addr_t> blacklist;
+ epoch_t epoch = 0;
+ objecter->with_osdmap([this, &blacklist, &epoch](const OSDMap& o) {
+ o.get_blacklist(&blacklist);
+ epoch = o.get_epoch();
+ });
+ auto killed = server->apply_blacklist(blacklist);
+ dout(4) << "reconnect_start: killed " << killed << " blacklisted sessions ("
+ << blacklist.size() << " blacklist entries, "
+ << sessionmap.get_sessions().size() << ")" << dendl;
+ if (killed) {
+ set_osd_epoch_barrier(epoch);
+ }
+
+ server->reconnect_clients(new C_MDS_VoidFn(this, &MDSRank::reconnect_done));
+ finish_contexts(g_ceph_context, waiting_for_reconnect);
+}
+void MDSRank::reconnect_done()
+{
+ dout(1) << "reconnect_done" << dendl;
+ request_state(MDSMap::STATE_REJOIN); // move to rejoin state
+}
+
+void MDSRank::rejoin_joint_start()
+{
+ dout(1) << "rejoin_joint_start" << dendl;
+ mdcache->rejoin_send_rejoins();
+}
+void MDSRank::rejoin_start()
+{
+ dout(1) << "rejoin_start" << dendl;
+ mdcache->rejoin_start(new C_MDS_VoidFn(this, &MDSRank::rejoin_done));
+}
+void MDSRank::rejoin_done()
+{
+ dout(1) << "rejoin_done" << dendl;
+ mdcache->show_subtrees();
+ mdcache->show_cache();
+
+ // funny case: is our cache empty? no subtrees?
+ if (!mdcache->is_subtrees()) {
+ if (whoami == 0) {
+ // The root should always have a subtree!
+ clog->error() << "No subtrees found for root MDS rank!";
+ damaged();
+ assert(mdcache->is_subtrees());
+ } else {
+ dout(1) << " empty cache, no subtrees, leaving cluster" << dendl;
+ request_state(MDSMap::STATE_STOPPED);
+ }
+ return;
+ }
+
+ if (replay_queue.empty())
+ request_state(MDSMap::STATE_ACTIVE);
+ else
+ request_state(MDSMap::STATE_CLIENTREPLAY);
+}
+
+void MDSRank::clientreplay_start()
+{
+ dout(1) << "clientreplay_start" << dendl;
+ finish_contexts(g_ceph_context, waiting_for_replay); // kick waiters
+ mdcache->start_files_to_recover();
+ queue_one_replay();
+}
+
+bool MDSRank::queue_one_replay()
+{
+ if (replay_queue.empty()) {
+ mdlog->wait_for_safe(new C_MDS_VoidFn(this, &MDSRank::clientreplay_done));
+ return false;
+ }
+ queue_waiter(replay_queue.front());
+ replay_queue.pop_front();
+ return true;
+}
+
+void MDSRank::clientreplay_done()
+{
+ dout(1) << "clientreplay_done" << dendl;
+ request_state(MDSMap::STATE_ACTIVE);
+}
+
+void MDSRank::active_start()
+{
+ dout(1) << "active_start" << dendl;
+
+ if (last_state == MDSMap::STATE_CREATING) {
+ mdcache->open_root();
+ }
+
+ mdcache->clean_open_file_lists();
+ mdcache->export_remaining_imported_caps();
+ finish_contexts(g_ceph_context, waiting_for_replay); // kick waiters
+ mdcache->start_files_to_recover();
+
+ mdcache->reissue_all_caps();
+ mdcache->activate_stray_manager();
+
+ finish_contexts(g_ceph_context, waiting_for_active); // kick waiters
+}
+
+void MDSRank::recovery_done(int oldstate)
+{
+ dout(1) << "recovery_done -- successful recovery!" << dendl;
+ assert(is_clientreplay() || is_active());
+
+ // kick snaptable (resent AGREEs)
+ if (mdsmap->get_tableserver() == whoami) {
+ set<mds_rank_t> active;
+ mdsmap->get_clientreplay_or_active_or_stopping_mds_set(active);
+ snapserver->finish_recovery(active);
+ }
+
+ if (oldstate == MDSMap::STATE_CREATING)
+ return;
+
+ mdcache->start_recovered_truncates();
+ mdcache->do_file_recover();
+
+ // tell connected clients
+ //bcast_mds_map(); // not anymore, they get this from the monitor
+
+ mdcache->populate_mydir();
+}
+
+void MDSRank::creating_done()
+{
+ dout(1)<< "creating_done" << dendl;
+ request_state(MDSMap::STATE_ACTIVE);
+}
+
+void MDSRank::boot_create()
+{
+ dout(3) << "boot_create" << dendl;
+
+ MDSGatherBuilder fin(g_ceph_context, new C_MDS_VoidFn(this, &MDSRank::creating_done));
+
+ mdcache->init_layouts();
+
+ snapserver->set_rank(whoami);
+ inotable->set_rank(whoami);
+ sessionmap.set_rank(whoami);
+
+ // start with a fresh journal
+ dout(10) << "boot_create creating fresh journal" << dendl;
+ mdlog->create(fin.new_sub());
+
+ // open new journal segment, but do not journal subtree map (yet)
+ mdlog->prepare_new_segment();
+
+ if (whoami == mdsmap->get_root()) {
+ dout(3) << "boot_create creating fresh hierarchy" << dendl;
+ mdcache->create_empty_hierarchy(fin.get());
+ }
+
+ dout(3) << "boot_create creating mydir hierarchy" << dendl;
+ mdcache->create_mydir_hierarchy(fin.get());
+
+ // fixme: fake out inotable (reset, pretend loaded)
+ dout(10) << "boot_create creating fresh inotable table" << dendl;
+ inotable->reset();
+ inotable->save(fin.new_sub());
+
+ // write empty sessionmap
+ sessionmap.save(fin.new_sub());
+
+ // Create empty purge queue
+ purge_queue.create(new C_IO_Wrapper(this, fin.new_sub()));
+
+ // initialize tables
+ if (mdsmap->get_tableserver() == whoami) {
+ dout(10) << "boot_create creating fresh snaptable" << dendl;
+ snapserver->reset();
+ snapserver->save(fin.new_sub());
+ }
+
+ assert(g_conf->mds_kill_create_at != 1);
+
+ // ok now journal it
+ mdlog->journal_segment_subtree_map(fin.new_sub());
+ mdlog->flush();
+
+ // Usually we do this during reconnect, but creation skips that.
+ objecter->enable_blacklist_events();
+
+ fin.activate();
+}
+
+void MDSRank::stopping_start()
+{
+ dout(2) << "stopping_start" << dendl;
+
+ if (mdsmap->get_num_in_mds() == 1 && !sessionmap.empty()) {
+ // we're the only mds up!
+ dout(0) << "we are the last MDS, and have mounted clients: we cannot flush our journal. suicide!" << dendl;
+ suicide();
+ }
+
+ mdcache->shutdown_start();
+}
+
+void MDSRank::stopping_done()
+{
+ dout(2) << "stopping_done" << dendl;
+
+ // tell monitor we shut down cleanly.
+ request_state(MDSMap::STATE_STOPPED);
+}
+
+void MDSRankDispatcher::handle_mds_map(
+ MMDSMap *m,
+ MDSMap *oldmap)
+{
+ // I am only to be passed MDSMaps in which I hold a rank
+ assert(whoami != MDS_RANK_NONE);
+
+ MDSMap::DaemonState oldstate = state;
+ mds_gid_t mds_gid = mds_gid_t(monc->get_global_id());
+ state = mdsmap->get_state_gid(mds_gid);
+ if (state != oldstate) {
+ last_state = oldstate;
+ incarnation = mdsmap->get_inc_gid(mds_gid);
+ }
+
+ version_t epoch = m->get_epoch();
+
+ // note source's map version
+ if (m->get_source().is_mds() &&
+ peer_mdsmap_epoch[mds_rank_t(m->get_source().num())] < epoch) {
+ dout(15) << " peer " << m->get_source()
+ << " has mdsmap epoch >= " << epoch
+ << dendl;
+ peer_mdsmap_epoch[mds_rank_t(m->get_source().num())] = epoch;
+ }
+
+ // Validate state transitions while I hold a rank
+ if (!MDSMap::state_transition_valid(oldstate, state)) {
+ derr << "Invalid state transition " << ceph_mds_state_name(oldstate)
+ << "->" << ceph_mds_state_name(state) << dendl;
+ respawn();
+ }
+
+ if (oldstate != state) {
+ // update messenger.
+ if (state == MDSMap::STATE_STANDBY_REPLAY) {
+ dout(1) << "handle_mds_map i am now mds." << mds_gid << "." << incarnation
+ << " replaying mds." << whoami << "." << incarnation << dendl;
+ messenger->set_myname(entity_name_t::MDS(mds_gid));
+ } else {
+ dout(1) << "handle_mds_map i am now mds." << whoami << "." << incarnation << dendl;
+ messenger->set_myname(entity_name_t::MDS(whoami));
+ }
+ }
+
+ // tell objecter my incarnation
+ if (objecter->get_client_incarnation() != incarnation)
+ objecter->set_client_incarnation(incarnation);
+
+ // for debug
+ if (g_conf->mds_dump_cache_on_map)
+ mdcache->dump_cache();
+
+ // did it change?
+ if (oldstate != state) {
+ dout(1) << "handle_mds_map state change "
+ << ceph_mds_state_name(oldstate) << " --> "
+ << ceph_mds_state_name(state) << dendl;
+ beacon.set_want_state(mdsmap, state);
+
+ if (oldstate == MDSMap::STATE_STANDBY_REPLAY) {
+ dout(10) << "Monitor activated us! Deactivating replay loop" << dendl;
+ assert (state == MDSMap::STATE_REPLAY);
+ } else {
+ // did i just recover?
+ if ((is_active() || is_clientreplay()) &&
+ (oldstate == MDSMap::STATE_CREATING ||
+ oldstate == MDSMap::STATE_REJOIN ||
+ oldstate == MDSMap::STATE_RECONNECT))
+ recovery_done(oldstate);
+
+ if (is_active()) {
+ active_start();
+ } else if (is_any_replay()) {
+ replay_start();
+ } else if (is_resolve()) {
+ resolve_start();
+ } else if (is_reconnect()) {
+ reconnect_start();
+ } else if (is_rejoin()) {
+ rejoin_start();
+ } else if (is_clientreplay()) {
+ clientreplay_start();
+ } else if (is_creating()) {
+ boot_create();
+ } else if (is_starting()) {
+ boot_start();
+ } else if (is_stopping()) {
+ assert(oldstate == MDSMap::STATE_ACTIVE);
+ stopping_start();
+ }
+ }
+ }
+
+ // RESOLVE
+ // is someone else newly resolving?
+ if (is_resolve() || is_reconnect() || is_rejoin() ||
+ is_clientreplay() || is_active() || is_stopping()) {
+ if (!oldmap->is_resolving() && mdsmap->is_resolving()) {
+ set<mds_rank_t> resolve;
+ mdsmap->get_mds_set(resolve, MDSMap::STATE_RESOLVE);
+ dout(10) << " resolve set is " << resolve << dendl;
+ calc_recovery_set();
+ mdcache->send_resolves();
+ }
+ }
+
+ // REJOIN
+ // is everybody finally rejoining?
+ if (is_starting() || is_rejoin() || is_clientreplay() || is_active() || is_stopping()) {
+ // did we start?
+ if (!oldmap->is_rejoining() && mdsmap->is_rejoining())
+ rejoin_joint_start();
+
+ // did we finish?
+ if (g_conf->mds_dump_cache_after_rejoin &&
+ oldmap->is_rejoining() && !mdsmap->is_rejoining())
+ mdcache->dump_cache(); // for DEBUG only
+
+ if (oldstate >= MDSMap::STATE_REJOIN ||
+ oldstate == MDSMap::STATE_STARTING) {
+ // ACTIVE|CLIENTREPLAY|REJOIN => we can discover from them.
+ set<mds_rank_t> olddis, dis;
+ oldmap->get_mds_set(olddis, MDSMap::STATE_ACTIVE);
+ oldmap->get_mds_set(olddis, MDSMap::STATE_CLIENTREPLAY);
+ oldmap->get_mds_set(olddis, MDSMap::STATE_REJOIN);
+ mdsmap->get_mds_set(dis, MDSMap::STATE_ACTIVE);
+ mdsmap->get_mds_set(dis, MDSMap::STATE_CLIENTREPLAY);
+ mdsmap->get_mds_set(dis, MDSMap::STATE_REJOIN);
+ for (set<mds_rank_t>::iterator p = dis.begin(); p != dis.end(); ++p)
+ if (*p != whoami && // not me
+ olddis.count(*p) == 0) { // newly so?
+ mdcache->kick_discovers(*p);
+ mdcache->kick_open_ino_peers(*p);
+ }
+ }
+ }
+
+ cluster_degraded = mdsmap->is_degraded();
+ if (oldmap->is_degraded() && !cluster_degraded && state >= MDSMap::STATE_ACTIVE) {
+ dout(1) << "cluster recovered." << dendl;
+ auto it = waiting_for_active_peer.find(MDS_RANK_NONE);
+ if (it != waiting_for_active_peer.end()) {
+ queue_waiters(it->second);
+ waiting_for_active_peer.erase(it);
+ }
+ }
+
+ // did someone go active?
+ if (oldstate >= MDSMap::STATE_CLIENTREPLAY &&
+ (is_clientreplay() || is_active() || is_stopping())) {
+ set<mds_rank_t> oldactive, active;
+ oldmap->get_mds_set(oldactive, MDSMap::STATE_ACTIVE);
+ oldmap->get_mds_set(oldactive, MDSMap::STATE_CLIENTREPLAY);
+ mdsmap->get_mds_set(active, MDSMap::STATE_ACTIVE);
+ mdsmap->get_mds_set(active, MDSMap::STATE_CLIENTREPLAY);
+ for (set<mds_rank_t>::iterator p = active.begin(); p != active.end(); ++p)
+ if (*p != whoami && // not me
+ oldactive.count(*p) == 0) // newly so?
+ handle_mds_recovery(*p);
+ }
+
+ // did someone fail?
+ // new down?
+ {
+ set<mds_rank_t> olddown, down;
+ oldmap->get_down_mds_set(&olddown);
+ mdsmap->get_down_mds_set(&down);
+ for (set<mds_rank_t>::iterator p = down.begin(); p != down.end(); ++p) {
+ if (oldmap->have_inst(*p) && olddown.count(*p) == 0) {
+ messenger->mark_down(oldmap->get_inst(*p).addr);
+ handle_mds_failure(*p);
+ }
+ }
+ }
+
+ // did someone fail?
+ // did their addr/inst change?
+ {
+ set<mds_rank_t> up;
+ mdsmap->get_up_mds_set(up);
+ for (set<mds_rank_t>::iterator p = up.begin(); p != up.end(); ++p) {
+ if (oldmap->have_inst(*p) &&
+ oldmap->get_inst(*p) != mdsmap->get_inst(*p)) {
+ messenger->mark_down(oldmap->get_inst(*p).addr);
+ handle_mds_failure(*p);
+ }
+ }
+ }
+
+ if (is_clientreplay() || is_active() || is_stopping()) {
+ // did anyone stop?
+ set<mds_rank_t> oldstopped, stopped;
+ oldmap->get_stopped_mds_set(oldstopped);
+ mdsmap->get_stopped_mds_set(stopped);
+ for (set<mds_rank_t>::iterator p = stopped.begin(); p != stopped.end(); ++p)
+ if (oldstopped.count(*p) == 0) // newly so?
+ mdcache->migrator->handle_mds_failure_or_stop(*p);
+ }
+
+ {
+ map<epoch_t,list<MDSInternalContextBase*> >::iterator p = waiting_for_mdsmap.begin();
+ while (p != waiting_for_mdsmap.end() && p->first <= mdsmap->get_epoch()) {
+ list<MDSInternalContextBase*> ls;
+ ls.swap(p->second);
+ waiting_for_mdsmap.erase(p++);
+ finish_contexts(g_ceph_context, ls);
+ }
+ }
+
+ if (is_active()) {
+ // Before going active, set OSD epoch barrier to latest (so that
+ // we don't risk handing out caps to clients with old OSD maps that
+ // might not include barriers from the previous incarnation of this MDS)
+ set_osd_epoch_barrier(objecter->with_osdmap(
+ std::mem_fn(&OSDMap::get_epoch)));
+ }
+
+ if (is_active()) {
+ bool found = false;
+ MDSMap::mds_info_t info = mdsmap->get_info(whoami);
+
+ for (map<mds_gid_t,MDSMap::mds_info_t>::const_iterator p = mdsmap->get_mds_info().begin();
+ p != mdsmap->get_mds_info().end();
+ ++p) {
+ if (p->second.state == MDSMap::STATE_STANDBY_REPLAY &&
+ (p->second.standby_for_rank == whoami ||(info.name.length() && p->second.standby_for_name == info.name))) {
+ found = true;
+ break;
+ }
+ if (found)
+ mdlog->set_write_iohint(0);
+ else
+ mdlog->set_write_iohint(CEPH_OSD_OP_FLAG_FADVISE_DONTNEED);
+ }
+ }
+
+ if (oldmap->get_max_mds() != mdsmap->get_max_mds()) {
+ purge_queue.update_op_limit(*mdsmap);
+ }
+}
+
+void MDSRank::handle_mds_recovery(mds_rank_t who)
+{
+ dout(5) << "handle_mds_recovery mds." << who << dendl;
+
+ mdcache->handle_mds_recovery(who);
+
+ if (mdsmap->get_tableserver() == whoami) {
+ snapserver->handle_mds_recovery(who);
+ }
+
+ queue_waiters(waiting_for_active_peer[who]);
+ waiting_for_active_peer.erase(who);
+}
+
+void MDSRank::handle_mds_failure(mds_rank_t who)
+{
+ if (who == whoami) {
+ dout(5) << "handle_mds_failure for myself; not doing anything" << dendl;
+ return;
+ }
+ dout(5) << "handle_mds_failure mds." << who << dendl;
+
+ mdcache->handle_mds_failure(who);
+
+ snapclient->handle_mds_failure(who);
+}
+
+bool MDSRankDispatcher::handle_asok_command(
+ std::string command, cmdmap_t& cmdmap, Formatter *f,
+ std::ostream& ss)
+{
+ if (command == "dump_ops_in_flight" ||
+ command == "ops") {
+ if (!op_tracker.dump_ops_in_flight(f)) {
+ ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \
+ please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards.";
+ }
+ } else if (command == "dump_blocked_ops") {
+ if (!op_tracker.dump_ops_in_flight(f, true)) {
+ ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \
+ Please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards.";
+ }
+ } else if (command == "dump_historic_ops") {
+ if (!op_tracker.dump_historic_ops(f)) {
+ ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \
+ please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards.";
+ }
+ } else if (command == "dump_historic_ops_by_duration") {
+ if (!op_tracker.dump_historic_ops(f, true)) {
+ ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \
+ please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards.";
+ }
+ } else if (command == "osdmap barrier") {
+ int64_t target_epoch = 0;
+ bool got_val = cmd_getval(g_ceph_context, cmdmap, "target_epoch", target_epoch);
+
+ if (!got_val) {
+ ss << "no target epoch given";
+ return true;
+ }
+
+ mds_lock.Lock();
+ set_osd_epoch_barrier(target_epoch);
+ mds_lock.Unlock();
+
+ C_SaferCond cond;
+ bool already_got = objecter->wait_for_map(target_epoch, &cond);
+ if (!already_got) {
+ dout(4) << __func__ << ": waiting for OSD epoch " << target_epoch << dendl;
+ cond.wait();
+ }
+ } else if (command == "session ls") {
+ Mutex::Locker l(mds_lock);
+
+ heartbeat_reset();
+
+ dump_sessions(SessionFilter(), f);
+ } else if (command == "session evict") {
+ std::string client_id;
+ const bool got_arg = cmd_getval(g_ceph_context, cmdmap, "client_id", client_id);
+ if(!got_arg) {
+ ss << "Invalid client_id specified";
+ return true;
+ }
+
+ mds_lock.Lock();
+ std::stringstream dss;
+ bool evicted = evict_client(strtol(client_id.c_str(), 0, 10), true,
+ g_conf->mds_session_blacklist_on_evict, dss);
+ if (!evicted) {
+ dout(15) << dss.str() << dendl;
+ ss << dss.str();
+ }
+ mds_lock.Unlock();
+ } else if (command == "scrub_path") {
+ string path;
+ vector<string> scrubop_vec;
+ cmd_getval(g_ceph_context, cmdmap, "scrubops", scrubop_vec);
+ cmd_getval(g_ceph_context, cmdmap, "path", path);
+ command_scrub_path(f, path, scrubop_vec);
+ } else if (command == "tag path") {
+ string path;
+ cmd_getval(g_ceph_context, cmdmap, "path", path);
+ string tag;
+ cmd_getval(g_ceph_context, cmdmap, "tag", tag);
+ command_tag_path(f, path, tag);
+ } else if (command == "flush_path") {
+ string path;
+ cmd_getval(g_ceph_context, cmdmap, "path", path);
+ command_flush_path(f, path);
+ } else if (command == "flush journal") {
+ command_flush_journal(f);
+ } else if (command == "get subtrees") {
+ command_get_subtrees(f);
+ } else if (command == "export dir") {
+ string path;
+ if(!cmd_getval(g_ceph_context, cmdmap, "path", path)) {
+ ss << "malformed path";
+ return true;
+ }
+ int64_t rank;
+ if(!cmd_getval(g_ceph_context, cmdmap, "rank", rank)) {
+ ss << "malformed rank";
+ return true;
+ }
+ command_export_dir(f, path, (mds_rank_t)rank);
+ } else if (command == "dump cache") {
+ Mutex::Locker l(mds_lock);
+ string path;
+ int r;
+ if(!cmd_getval(g_ceph_context, cmdmap, "path", path)) {
+ r = mdcache->dump_cache(f);
+ } else {
+ r = mdcache->dump_cache(path);
+ }
+
+ if (r != 0) {
+ ss << "Failed to dump cache: " << cpp_strerror(r);
+ f->reset();
+ }
+ } else if (command == "cache status") {
+ Mutex::Locker l(mds_lock);
+ int r = mdcache->cache_status(f);
+ if (r != 0) {
+ ss << "Failed to get cache status: " << cpp_strerror(r);
+ }
+ } else if (command == "dump tree") {
+ string root;
+ int64_t depth;
+ cmd_getval(g_ceph_context, cmdmap, "root", root);
+ if (!cmd_getval(g_ceph_context, cmdmap, "depth", depth))
+ depth = -1;
+ {
+ Mutex::Locker l(mds_lock);
+ int r = mdcache->dump_cache(root, depth, f);
+ if (r != 0) {
+ ss << "Failed to dump tree: " << cpp_strerror(r);
+ f->reset();
+ }
+ }
+ } else if (command == "force_readonly") {
+ Mutex::Locker l(mds_lock);
+ mdcache->force_readonly();
+ } else if (command == "dirfrag split") {
+ command_dirfrag_split(cmdmap, ss);
+ } else if (command == "dirfrag merge") {
+ command_dirfrag_merge(cmdmap, ss);
+ } else if (command == "dirfrag ls") {
+ command_dirfrag_ls(cmdmap, ss, f);
+ } else {
+ return false;
+ }
+
+ return true;
+}
+
+class C_MDS_Send_Command_Reply : public MDSInternalContext
+{
+protected:
+ MCommand *m;
+public:
+ C_MDS_Send_Command_Reply(MDSRank *_mds, MCommand *_m) :
+ MDSInternalContext(_mds), m(_m) { m->get(); }
+ void send (int r, const std::string& out_str) {
+ bufferlist bl;
+ MDSDaemon::send_command_reply(m, mds, r, bl, out_str);
+ m->put();
+ }
+ void finish (int r) override {
+ send(r, "");
+ }
+};
+
+/**
+ * This function drops the mds_lock, so don't do anything with
+ * MDSRank after calling it (we could have gone into shutdown): just
+ * send your result back to the calling client and finish.
+ */
+void MDSRankDispatcher::evict_clients(const SessionFilter &filter, MCommand *m)
+{
+ C_MDS_Send_Command_Reply *reply = new C_MDS_Send_Command_Reply(this, m);
+
+ if (is_any_replay()) {
+ reply->send(-EAGAIN, "MDS is replaying log");
+ delete reply;
+ return;
+ }
+
+ std::list<Session*> victims;
+ const auto sessions = sessionmap.get_sessions();
+ for (const auto p : sessions) {
+ if (!p.first.is_client()) {
+ continue;
+ }
+
+ Session *s = p.second;
+
+ if (filter.match(*s, std::bind(&Server::waiting_for_reconnect, server, std::placeholders::_1))) {
+ victims.push_back(s);
+ }
+ }
+
+ dout(20) << __func__ << " matched " << victims.size() << " sessions" << dendl;
+
+ if (victims.empty()) {
+ reply->send(0, "");
+ delete reply;
+ return;
+ }
+
+ C_GatherBuilder gather(g_ceph_context, reply);
+ for (const auto s : victims) {
+ std::stringstream ss;
+ evict_client(s->info.inst.name.num(), false,
+ g_conf->mds_session_blacklist_on_evict, ss, gather.new_sub());
+ }
+ gather.activate();
+}
+
+void MDSRankDispatcher::dump_sessions(const SessionFilter &filter, Formatter *f) const
+{
+ // Dump sessions, decorated with recovery/replay status
+ f->open_array_section("sessions");
+ const ceph::unordered_map<entity_name_t, Session*> session_map = sessionmap.get_sessions();
+ for (ceph::unordered_map<entity_name_t,Session*>::const_iterator p = session_map.begin();
+ p != session_map.end();
+ ++p) {
+ if (!p->first.is_client()) {
+ continue;
+ }
+
+ Session *s = p->second;
+
+ if (!filter.match(*s, std::bind(&Server::waiting_for_reconnect, server, std::placeholders::_1))) {
+ continue;
+ }
+
+ f->open_object_section("session");
+ f->dump_int("id", p->first.num());
+
+ f->dump_int("num_leases", s->leases.size());
+ f->dump_int("num_caps", s->caps.size());
+
+ f->dump_string("state", s->get_state_name());
+ f->dump_int("replay_requests", is_clientreplay() ? s->get_request_count() : 0);
+ f->dump_unsigned("completed_requests", s->get_num_completed_requests());
+ f->dump_bool("reconnecting", server->waiting_for_reconnect(p->first.num()));
+ f->dump_stream("inst") << s->info.inst;
+ f->open_object_section("client_metadata");
+ for (map<string, string>::const_iterator i = s->info.client_metadata.begin();
+ i != s->info.client_metadata.end(); ++i) {
+ f->dump_string(i->first.c_str(), i->second);
+ }
+ f->close_section(); // client_metadata
+ f->close_section(); //session
+ }
+ f->close_section(); //sessions
+}
+
+void MDSRank::command_scrub_path(Formatter *f, const string& path, vector<string>& scrubop_vec)
+{
+ bool force = false;
+ bool recursive = false;
+ bool repair = false;
+ for (vector<string>::iterator i = scrubop_vec.begin() ; i != scrubop_vec.end(); ++i) {
+ if (*i == "force")
+ force = true;
+ else if (*i == "recursive")
+ recursive = true;
+ else if (*i == "repair")
+ repair = true;
+ }
+ C_SaferCond scond;
+ {
+ Mutex::Locker l(mds_lock);
+ mdcache->enqueue_scrub(path, "", force, recursive, repair, f, &scond);
+ }
+ scond.wait();
+ // scrub_dentry() finishers will dump the data for us; we're done!
+}
+
+void MDSRank::command_tag_path(Formatter *f,
+ const string& path, const std::string &tag)
+{
+ C_SaferCond scond;
+ {
+ Mutex::Locker l(mds_lock);
+ mdcache->enqueue_scrub(path, tag, true, true, false, f, &scond);
+ }
+ scond.wait();
+}
+
+void MDSRank::command_flush_path(Formatter *f, const string& path)
+{
+ C_SaferCond scond;
+ {
+ Mutex::Locker l(mds_lock);
+ mdcache->flush_dentry(path, &scond);
+ }
+ int r = scond.wait();
+ f->open_object_section("results");
+ f->dump_int("return_code", r);
+ f->close_section(); // results
+}
+
+/**
+ * Wrapper around _command_flush_journal that
+ * handles serialization of result
+ */
+void MDSRank::command_flush_journal(Formatter *f)
+{
+ assert(f != NULL);
+
+ std::stringstream ss;
+ const int r = _command_flush_journal(&ss);
+ f->open_object_section("result");
+ f->dump_string("message", ss.str());
+ f->dump_int("return_code", r);
+ f->close_section();
+}
+
+/**
+ * Implementation of "flush journal" asok command.
+ *
+ * @param ss
+ * Optionally populate with a human readable string describing the
+ * reason for any unexpected return status.
+ */
+int MDSRank::_command_flush_journal(std::stringstream *ss)
+{
+ assert(ss != NULL);
+
+ Mutex::Locker l(mds_lock);
+
+ if (mdcache->is_readonly()) {
+ dout(5) << __func__ << ": read-only FS" << dendl;
+ return -EROFS;
+ }
+
+ if (!is_active()) {
+ dout(5) << __func__ << ": MDS not active, no-op" << dendl;
+ return 0;
+ }
+
+ // I need to seal off the current segment, and then mark all previous segments
+ // for expiry
+ mdlog->start_new_segment();
+ int r = 0;
+
+ // Flush initially so that all the segments older than our new one
+ // will be elegible for expiry
+ {
+ C_SaferCond mdlog_flushed;
+ mdlog->flush();
+ mdlog->wait_for_safe(new MDSInternalContextWrapper(this, &mdlog_flushed));
+ mds_lock.Unlock();
+ r = mdlog_flushed.wait();
+ mds_lock.Lock();
+ if (r != 0) {
+ *ss << "Error " << r << " (" << cpp_strerror(r) << ") while flushing journal";
+ return r;
+ }
+ }
+
+ // Because we may not be the last wait_for_safe context on MDLog, and
+ // subsequent contexts might wake up in the middle of our later trim_all
+ // and interfere with expiry (by e.g. marking dirs/dentries dirty
+ // on previous log segments), we run a second wait_for_safe here.
+ // See #10368
+ {
+ C_SaferCond mdlog_cleared;
+ mdlog->wait_for_safe(new MDSInternalContextWrapper(this, &mdlog_cleared));
+ mds_lock.Unlock();
+ r = mdlog_cleared.wait();
+ mds_lock.Lock();
+ if (r != 0) {
+ *ss << "Error " << r << " (" << cpp_strerror(r) << ") while flushing journal";
+ return r;
+ }
+ }
+
+ // Put all the old log segments into expiring or expired state
+ dout(5) << __func__ << ": beginning segment expiry" << dendl;
+ r = mdlog->trim_all();
+ if (r != 0) {
+ *ss << "Error " << r << " (" << cpp_strerror(r) << ") while trimming log";
+ return r;
+ }
+
+ // Attach contexts to wait for all expiring segments to expire
+ MDSGatherBuilder expiry_gather(g_ceph_context);
+
+ const std::set<LogSegment*> &expiring_segments = mdlog->get_expiring_segments();
+ for (std::set<LogSegment*>::const_iterator i = expiring_segments.begin();
+ i != expiring_segments.end(); ++i) {
+ (*i)->wait_for_expiry(expiry_gather.new_sub());
+ }
+ dout(5) << __func__ << ": waiting for " << expiry_gather.num_subs_created()
+ << " segments to expire" << dendl;
+
+ if (expiry_gather.has_subs()) {
+ C_SaferCond cond;
+ expiry_gather.set_finisher(new MDSInternalContextWrapper(this, &cond));
+ expiry_gather.activate();
+
+ // Drop mds_lock to allow progress until expiry is complete
+ mds_lock.Unlock();
+ int r = cond.wait();
+ mds_lock.Lock();
+
+ assert(r == 0); // MDLog is not allowed to raise errors via wait_for_expiry
+ }
+
+ dout(5) << __func__ << ": expiry complete, expire_pos/trim_pos is now " << std::hex <<
+ mdlog->get_journaler()->get_expire_pos() << "/" <<
+ mdlog->get_journaler()->get_trimmed_pos() << dendl;
+
+ // Now everyone I'm interested in is expired
+ mdlog->trim_expired_segments();
+
+ dout(5) << __func__ << ": trim complete, expire_pos/trim_pos is now " << std::hex <<
+ mdlog->get_journaler()->get_expire_pos() << "/" <<
+ mdlog->get_journaler()->get_trimmed_pos() << dendl;
+
+ // Flush the journal header so that readers will start from after the flushed region
+ C_SaferCond wrote_head;
+ mdlog->get_journaler()->write_head(&wrote_head);
+ mds_lock.Unlock(); // Drop lock to allow messenger dispatch progress
+ r = wrote_head.wait();
+ mds_lock.Lock();
+ if (r != 0) {
+ *ss << "Error " << r << " (" << cpp_strerror(r) << ") while writing header";
+ return r;
+ }
+
+ dout(5) << __func__ << ": write_head complete, all done!" << dendl;
+
+ return 0;
+}
+
+
+void MDSRank::command_get_subtrees(Formatter *f)
+{
+ assert(f != NULL);
+ Mutex::Locker l(mds_lock);
+
+ std::list<CDir*> subtrees;
+ mdcache->list_subtrees(subtrees);
+
+ f->open_array_section("subtrees");
+ for (std::list<CDir*>::iterator i = subtrees.begin(); i != subtrees.end(); ++i) {
+ const CDir *dir = *i;
+
+ f->open_object_section("subtree");
+ {
+ f->dump_bool("is_auth", dir->is_auth());
+ f->dump_int("auth_first", dir->get_dir_auth().first);
+ f->dump_int("auth_second", dir->get_dir_auth().second);
+ f->dump_int("export_pin", dir->inode->get_export_pin());
+ f->open_object_section("dir");
+ dir->dump(f);
+ f->close_section();
+ }
+ f->close_section();
+ }
+ f->close_section();
+}
+
+
+void MDSRank::command_export_dir(Formatter *f,
+ const std::string &path,
+ mds_rank_t target)
+{
+ int r = _command_export_dir(path, target);
+ f->open_object_section("results");
+ f->dump_int("return_code", r);
+ f->close_section(); // results
+}
+
+int MDSRank::_command_export_dir(
+ const std::string &path,
+ mds_rank_t target)
+{
+ Mutex::Locker l(mds_lock);
+ filepath fp(path.c_str());
+
+ if (target == whoami || !mdsmap->is_up(target) || !mdsmap->is_in(target)) {
+ derr << "bad MDS target " << target << dendl;
+ return -ENOENT;
+ }
+
+ CInode *in = mdcache->cache_traverse(fp);
+ if (!in) {
+ derr << "Bath path '" << path << "'" << dendl;
+ return -ENOENT;
+ }
+ CDir *dir = in->get_dirfrag(frag_t());
+ if (!dir || !(dir->is_auth())) {
+ derr << "bad export_dir path dirfrag frag_t() or dir not auth" << dendl;
+ return -EINVAL;
+ }
+
+ mdcache->migrator->export_dir(dir, target);
+ return 0;
+}
+
+CDir *MDSRank::_command_dirfrag_get(
+ const cmdmap_t &cmdmap,
+ std::ostream &ss)
+{
+ std::string path;
+ bool got = cmd_getval(g_ceph_context, cmdmap, "path", path);
+ if (!got) {
+ ss << "missing path argument";
+ return NULL;
+ }
+
+ std::string frag_str;
+ if (!cmd_getval(g_ceph_context, cmdmap, "frag", frag_str)) {
+ ss << "missing frag argument";
+ return NULL;
+ }
+
+ CInode *in = mdcache->cache_traverse(filepath(path.c_str()));
+ if (!in) {
+ // TODO really we should load something in if it's not in cache,
+ // but the infrastructure is harder, and we might still be unable
+ // to act on it if someone else is auth.
+ ss << "directory '" << path << "' inode not in cache";
+ return NULL;
+ }
+
+ frag_t fg;
+
+ if (!fg.parse(frag_str.c_str())) {
+ ss << "frag " << frag_str << " failed to parse";
+ return NULL;
+ }
+
+ CDir *dir = in->get_dirfrag(fg);
+ if (!dir) {
+ ss << "frag 0x" << std::hex << in->ino() << "/" << fg << " not in cache ("
+ "use `dirfrag ls` to see if it should exist)";
+ return NULL;
+ }
+
+ if (!dir->is_auth()) {
+ ss << "frag " << dir->dirfrag() << " not auth (auth = "
+ << dir->authority() << ")";
+ return NULL;
+ }
+
+ return dir;
+}
+
+bool MDSRank::command_dirfrag_split(
+ cmdmap_t cmdmap,
+ std::ostream &ss)
+{
+ Mutex::Locker l(mds_lock);
+ if (!mdsmap->allows_dirfrags()) {
+ ss << "dirfrags are disallowed by the mds map!";
+ return false;
+ }
+
+ int64_t by = 0;
+ if (!cmd_getval(g_ceph_context, cmdmap, "bits", by)) {
+ ss << "missing bits argument";
+ return false;
+ }
+
+ if (by <= 0) {
+ ss << "must split by >0 bits";
+ return false;
+ }
+
+ CDir *dir = _command_dirfrag_get(cmdmap, ss);
+ if (!dir) {
+ return false;
+ }
+
+ mdcache->split_dir(dir, by);
+
+ return true;
+}
+
+bool MDSRank::command_dirfrag_merge(
+ cmdmap_t cmdmap,
+ std::ostream &ss)
+{
+ Mutex::Locker l(mds_lock);
+ std::string path;
+ bool got = cmd_getval(g_ceph_context, cmdmap, "path", path);
+ if (!got) {
+ ss << "missing path argument";
+ return false;
+ }
+
+ std::string frag_str;
+ if (!cmd_getval(g_ceph_context, cmdmap, "frag", frag_str)) {
+ ss << "missing frag argument";
+ return false;
+ }
+
+ CInode *in = mdcache->cache_traverse(filepath(path.c_str()));
+ if (!in) {
+ ss << "directory '" << path << "' inode not in cache";
+ return false;
+ }
+
+ frag_t fg;
+ if (!fg.parse(frag_str.c_str())) {
+ ss << "frag " << frag_str << " failed to parse";
+ return false;
+ }
+
+ mdcache->merge_dir(in, fg);
+
+ return true;
+}
+
+bool MDSRank::command_dirfrag_ls(
+ cmdmap_t cmdmap,
+ std::ostream &ss,
+ Formatter *f)
+{
+ Mutex::Locker l(mds_lock);
+ std::string path;
+ bool got = cmd_getval(g_ceph_context, cmdmap, "path", path);
+ if (!got) {
+ ss << "missing path argument";
+ return false;
+ }
+
+ CInode *in = mdcache->cache_traverse(filepath(path.c_str()));
+ if (!in) {
+ ss << "directory inode not in cache";
+ return false;
+ }
+
+ f->open_array_section("frags");
+ std::list<frag_t> frags;
+ // NB using get_leaves_under instead of get_dirfrags to give
+ // you the list of what dirfrags may exist, not which are in cache
+ in->dirfragtree.get_leaves_under(frag_t(), frags);
+ for (std::list<frag_t>::iterator i = frags.begin();
+ i != frags.end(); ++i) {
+ f->open_object_section("frag");
+ f->dump_int("value", i->value());
+ f->dump_int("bits", i->bits());
+ std::ostringstream frag_str;
+ frag_str << std::hex << i->value() << "/" << std::dec << i->bits();
+ f->dump_string("str", frag_str.str());
+ f->close_section();
+ }
+ f->close_section();
+
+ return true;
+}
+
+void MDSRank::dump_status(Formatter *f) const
+{
+ if (state == MDSMap::STATE_REPLAY ||
+ state == MDSMap::STATE_STANDBY_REPLAY) {
+ mdlog->dump_replay_status(f);
+ } else if (state == MDSMap::STATE_RESOLVE) {
+ mdcache->dump_resolve_status(f);
+ } else if (state == MDSMap::STATE_RECONNECT) {
+ server->dump_reconnect_status(f);
+ } else if (state == MDSMap::STATE_REJOIN) {
+ mdcache->dump_rejoin_status(f);
+ } else if (state == MDSMap::STATE_CLIENTREPLAY) {
+ dump_clientreplay_status(f);
+ }
+}
+
+void MDSRank::dump_clientreplay_status(Formatter *f) const
+{
+ f->open_object_section("clientreplay_status");
+ f->dump_unsigned("clientreplay_queue", replay_queue.size());
+ f->dump_unsigned("active_replay", mdcache->get_num_client_requests());
+ f->close_section();
+}
+
+void MDSRankDispatcher::update_log_config()
+{
+ map<string,string> log_to_monitors;
+ map<string,string> log_to_syslog;
+ map<string,string> log_channel;
+ map<string,string> log_prio;
+ map<string,string> log_to_graylog;
+ map<string,string> log_to_graylog_host;
+ map<string,string> log_to_graylog_port;
+ uuid_d fsid;
+ string host;
+
+ if (parse_log_client_options(g_ceph_context, log_to_monitors, log_to_syslog,
+ log_channel, log_prio, log_to_graylog,
+ log_to_graylog_host, log_to_graylog_port,
+ fsid, host) == 0)
+ clog->update_config(log_to_monitors, log_to_syslog,
+ log_channel, log_prio, log_to_graylog,
+ log_to_graylog_host, log_to_graylog_port,
+ fsid, host);
+ dout(10) << __func__ << " log_to_monitors " << log_to_monitors << dendl;
+}
+
+void MDSRank::create_logger()
+{
+ dout(10) << "create_logger" << dendl;
+ {
+ PerfCountersBuilder mds_plb(g_ceph_context, "mds", l_mds_first, l_mds_last);
+
+ mds_plb.add_u64_counter(
+ l_mds_request, "request", "Requests", "req",
+ PerfCountersBuilder::PRIO_CRITICAL);
+ mds_plb.add_u64_counter(l_mds_reply, "reply", "Replies");
+ mds_plb.add_time_avg(
+ l_mds_reply_latency, "reply_latency", "Reply latency", "rlat",
+ PerfCountersBuilder::PRIO_CRITICAL);
+ mds_plb.add_u64_counter(
+ l_mds_forward, "forward", "Forwarding request", "fwd",
+ PerfCountersBuilder::PRIO_INTERESTING);
+ mds_plb.add_u64_counter(l_mds_dir_fetch, "dir_fetch", "Directory fetch");
+ mds_plb.add_u64_counter(l_mds_dir_commit, "dir_commit", "Directory commit");
+ mds_plb.add_u64_counter(l_mds_dir_split, "dir_split", "Directory split");
+ mds_plb.add_u64_counter(l_mds_dir_merge, "dir_merge", "Directory merge");
+
+ mds_plb.add_u64(l_mds_inode_max, "inode_max", "Max inodes, cache size");
+ mds_plb.add_u64(l_mds_inodes, "inodes", "Inodes", "inos",
+ PerfCountersBuilder::PRIO_CRITICAL);
+ mds_plb.add_u64(l_mds_inodes_top, "inodes_top", "Inodes on top");
+ mds_plb.add_u64(l_mds_inodes_bottom, "inodes_bottom", "Inodes on bottom");
+ mds_plb.add_u64(
+ l_mds_inodes_pin_tail, "inodes_pin_tail", "Inodes on pin tail");
+ mds_plb.add_u64(l_mds_inodes_pinned, "inodes_pinned", "Inodes pinned");
+ mds_plb.add_u64(l_mds_inodes_expired, "inodes_expired", "Inodes expired");
+ mds_plb.add_u64(
+ l_mds_inodes_with_caps, "inodes_with_caps", "Inodes with capabilities");
+ mds_plb.add_u64(l_mds_caps, "caps", "Capabilities", "caps",
+ PerfCountersBuilder::PRIO_INTERESTING);
+ mds_plb.add_u64(l_mds_subtrees, "subtrees", "Subtrees");
+
+ mds_plb.add_u64_counter(l_mds_traverse, "traverse", "Traverses");
+ mds_plb.add_u64_counter(l_mds_traverse_hit, "traverse_hit", "Traverse hits");
+ mds_plb.add_u64_counter(l_mds_traverse_forward, "traverse_forward",
+ "Traverse forwards");
+ mds_plb.add_u64_counter(l_mds_traverse_discover, "traverse_discover",
+ "Traverse directory discovers");
+ mds_plb.add_u64_counter(l_mds_traverse_dir_fetch, "traverse_dir_fetch",
+ "Traverse incomplete directory content fetchings");
+ mds_plb.add_u64_counter(l_mds_traverse_remote_ino, "traverse_remote_ino",
+ "Traverse remote dentries");
+ mds_plb.add_u64_counter(l_mds_traverse_lock, "traverse_lock",
+ "Traverse locks");
+
+ mds_plb.add_u64(l_mds_load_cent, "load_cent", "Load per cent");
+ mds_plb.add_u64(l_mds_dispatch_queue_len, "q", "Dispatch queue length");
+
+ mds_plb.add_u64_counter(l_mds_exported, "exported", "Exports");
+ mds_plb.add_u64_counter(
+ l_mds_exported_inodes, "exported_inodes", "Exported inodes", "exi",
+ PerfCountersBuilder::PRIO_INTERESTING);
+ mds_plb.add_u64_counter(l_mds_imported, "imported", "Imports");
+ mds_plb.add_u64_counter(
+ l_mds_imported_inodes, "imported_inodes", "Imported inodes", "imi",
+ PerfCountersBuilder::PRIO_INTERESTING);
+ logger = mds_plb.create_perf_counters();
+ g_ceph_context->get_perfcounters_collection()->add(logger);
+ }
+
+ {
+ PerfCountersBuilder mdm_plb(g_ceph_context, "mds_mem", l_mdm_first, l_mdm_last);
+ mdm_plb.add_u64(l_mdm_ino, "ino", "Inodes");
+ mdm_plb.add_u64_counter(l_mdm_inoa, "ino+", "Inodes opened");
+ mdm_plb.add_u64_counter(l_mdm_inos, "ino-", "Inodes closed");
+ mdm_plb.add_u64(l_mdm_dir, "dir", "Directories");
+ mdm_plb.add_u64_counter(l_mdm_dira, "dir+", "Directories opened");
+ mdm_plb.add_u64_counter(l_mdm_dirs, "dir-", "Directories closed");
+ mdm_plb.add_u64(l_mdm_dn, "dn", "Dentries");
+ mdm_plb.add_u64_counter(l_mdm_dna, "dn+", "Dentries opened");
+ mdm_plb.add_u64_counter(l_mdm_dns, "dn-", "Dentries closed");
+ mdm_plb.add_u64(l_mdm_cap, "cap", "Capabilities");
+ mdm_plb.add_u64_counter(l_mdm_capa, "cap+", "Capabilities added");
+ mdm_plb.add_u64_counter(l_mdm_caps, "cap-", "Capabilities removed");
+ mdm_plb.add_u64(l_mdm_rss, "rss", "RSS");
+ mdm_plb.add_u64(l_mdm_heap, "heap", "Heap size");
+ mdm_plb.add_u64(l_mdm_buf, "buf", "Buffer size");
+ mlogger = mdm_plb.create_perf_counters();
+ g_ceph_context->get_perfcounters_collection()->add(mlogger);
+ }
+
+ mdlog->create_logger();
+ server->create_logger();
+ purge_queue.create_logger();
+ sessionmap.register_perfcounters();
+ mdcache->register_perfcounters();
+}
+
+void MDSRank::check_ops_in_flight()
+{
+ vector<string> warnings;
+ int slow = 0;
+ if (op_tracker.check_ops_in_flight(warnings, &slow)) {
+ for (vector<string>::iterator i = warnings.begin();
+ i != warnings.end();
+ ++i) {
+ clog->warn() << *i;
+ }
+ }
+
+ // set mds slow request count
+ mds_slow_req_count = slow;
+ return;
+}
+
+void MDSRankDispatcher::handle_osd_map()
+{
+ if (is_active() && snapserver) {
+ snapserver->check_osd_map(true);
+ }
+
+ server->handle_osd_map();
+
+ purge_queue.update_op_limit(*mdsmap);
+
+ std::set<entity_addr_t> newly_blacklisted;
+ objecter->consume_blacklist_events(&newly_blacklisted);
+ auto epoch = objecter->with_osdmap([](const OSDMap &o){return o.get_epoch();});
+ dout(4) << "handle_osd_map epoch " << epoch << ", "
+ << newly_blacklisted.size() << " new blacklist entries" << dendl;
+ auto victims = server->apply_blacklist(newly_blacklisted);
+ if (victims) {
+ set_osd_epoch_barrier(epoch);
+ }
+
+
+ // By default the objecter only requests OSDMap updates on use,
+ // we would like to always receive the latest maps in order to
+ // apply policy based on the FULL flag.
+ objecter->maybe_request_map();
+}
+
+bool MDSRank::evict_client(int64_t session_id,
+ bool wait, bool blacklist, std::stringstream& err_ss,
+ Context *on_killed)
+{
+ assert(mds_lock.is_locked_by_me());
+
+ // Mutually exclusive args
+ assert(!(wait && on_killed != nullptr));
+
+ if (is_any_replay()) {
+ err_ss << "MDS is replaying log";
+ return false;
+ }
+
+ Session *session = sessionmap.get_session(
+ entity_name_t(CEPH_ENTITY_TYPE_CLIENT, session_id));
+ if (!session) {
+ err_ss << "session " << session_id << " not in sessionmap!";
+ return false;
+ }
+
+ dout(4) << "Preparing blacklist command... (wait=" << wait << ")" << dendl;
+ stringstream ss;
+ ss << "{\"prefix\":\"osd blacklist\", \"blacklistop\":\"add\",";
+ ss << "\"addr\":\"";
+ ss << session->info.inst.addr;
+ ss << "\"}";
+ std::string tmp = ss.str();
+ std::vector<std::string> cmd = {tmp};
+
+ auto kill_mds_session = [this, session_id, on_killed](){
+ assert(mds_lock.is_locked_by_me());
+ Session *session = sessionmap.get_session(
+ entity_name_t(CEPH_ENTITY_TYPE_CLIENT, session_id));
+ if (session) {
+ if (on_killed) {
+ server->kill_session(session, on_killed);
+ } else {
+ C_SaferCond on_safe;
+ server->kill_session(session, &on_safe);
+
+ mds_lock.Unlock();
+ on_safe.wait();
+ mds_lock.Lock();
+ }
+ } else {
+ dout(1) << "session " << session_id << " was removed while we waited "
+ "for blacklist" << dendl;
+
+ // Even though it wasn't us that removed it, kick our completion
+ // as the session has been removed.
+ if (on_killed) {
+ on_killed->complete(0);
+ }
+ }
+ };
+
+ auto background_blacklist = [this, session_id, cmd](std::function<void ()> fn){
+ assert(mds_lock.is_locked_by_me());
+
+ Context *on_blacklist_done = new FunctionContext([this, session_id, fn](int r) {
+ objecter->wait_for_latest_osdmap(
+ new C_OnFinisher(
+ new FunctionContext([this, session_id, fn](int r) {
+ Mutex::Locker l(mds_lock);
+ auto epoch = objecter->with_osdmap([](const OSDMap &o){
+ return o.get_epoch();
+ });
+
+ set_osd_epoch_barrier(epoch);
+
+ fn();
+ }), finisher)
+ );
+ });
+
+ dout(4) << "Sending mon blacklist command: " << cmd[0] << dendl;
+ monc->start_mon_command(cmd, {}, nullptr, nullptr, on_blacklist_done);
+ };
+
+ auto blocking_blacklist = [this, cmd, &err_ss, background_blacklist](){
+ C_SaferCond inline_ctx;
+ background_blacklist([&inline_ctx](){inline_ctx.complete(0);});
+ mds_lock.Unlock();
+ inline_ctx.wait();
+ mds_lock.Lock();
+ };
+
+ if (wait) {
+ if (blacklist) {
+ blocking_blacklist();
+ }
+
+ // We dropped mds_lock, so check that session still exists
+ session = sessionmap.get_session(entity_name_t(CEPH_ENTITY_TYPE_CLIENT,
+ session_id));
+ if (!session) {
+ dout(1) << "session " << session_id << " was removed while we waited "
+ "for blacklist" << dendl;
+ return true;
+ }
+ kill_mds_session();
+ } else {
+ if (blacklist) {
+ background_blacklist(kill_mds_session);
+ } else {
+ kill_mds_session();
+ }
+ }
+
+ return true;
+}
+
+void MDSRank::bcast_mds_map()
+{
+ dout(7) << "bcast_mds_map " << mdsmap->get_epoch() << dendl;
+
+ // share the map with mounted clients
+ set<Session*> clients;
+ sessionmap.get_client_session_set(clients);
+ for (set<Session*>::const_iterator p = clients.begin();
+ p != clients.end();
+ ++p)
+ (*p)->connection->send_message(new MMDSMap(monc->get_fsid(), mdsmap));
+ last_client_mdsmap_bcast = mdsmap->get_epoch();
+}
+
+MDSRankDispatcher::MDSRankDispatcher(
+ mds_rank_t whoami_,
+ Mutex &mds_lock_,
+ LogChannelRef &clog_,
+ SafeTimer &timer_,
+ Beacon &beacon_,
+ MDSMap *& mdsmap_,
+ Messenger *msgr,
+ MonClient *monc_,
+ Context *respawn_hook_,
+ Context *suicide_hook_)
+ : MDSRank(whoami_, mds_lock_, clog_, timer_, beacon_, mdsmap_,
+ msgr, monc_, respawn_hook_, suicide_hook_)
+{}
+
+bool MDSRankDispatcher::handle_command(
+ const cmdmap_t &cmdmap,
+ MCommand *m,
+ int *r,
+ std::stringstream *ds,
+ std::stringstream *ss,
+ bool *need_reply)
+{
+ assert(r != nullptr);
+ assert(ds != nullptr);
+ assert(ss != nullptr);
+
+ *need_reply = true;
+
+ std::string prefix;
+ cmd_getval(g_ceph_context, cmdmap, "prefix", prefix);
+
+ if (prefix == "session ls" || prefix == "client ls") {
+ std::vector<std::string> filter_args;
+ cmd_getval(g_ceph_context, cmdmap, "filters", filter_args);
+
+ SessionFilter filter;
+ *r = filter.parse(filter_args, ss);
+ if (*r != 0) {
+ return true;
+ }
+
+ Formatter *f = new JSONFormatter(true);
+ dump_sessions(filter, f);
+ f->flush(*ds);
+ delete f;
+ return true;
+ } else if (prefix == "session evict" || prefix == "client evict") {
+ std::vector<std::string> filter_args;
+ cmd_getval(g_ceph_context, cmdmap, "filters", filter_args);
+
+ SessionFilter filter;
+ *r = filter.parse(filter_args, ss);
+ if (*r != 0) {
+ return true;
+ }
+
+ evict_clients(filter, m);
+
+ *need_reply = false;
+ return true;
+ } else if (prefix == "damage ls") {
+ Formatter *f = new JSONFormatter(true);
+ damage_table.dump(f);
+ f->flush(*ds);
+ delete f;
+ return true;
+ } else if (prefix == "damage rm") {
+ damage_entry_id_t id = 0;
+ bool got = cmd_getval(g_ceph_context, cmdmap, "damage_id", (int64_t&)id);
+ if (!got) {
+ *r = -EINVAL;
+ return true;
+ }
+
+ damage_table.erase(id);
+ return true;
+ } else {
+ return false;
+ }
+}
+
+epoch_t MDSRank::get_osd_epoch() const
+{
+ return objecter->with_osdmap(std::mem_fn(&OSDMap::get_epoch));
+}
+
Code Review / stor4nfv.git / blobdiff