--- /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 "MDSRank.h"
+#include "MDCache.h"
+#include "Locker.h"
+#include "CInode.h"
+#include "CDir.h"
+#include "CDentry.h"
+#include "Mutation.h"
+#include "MDSContext.h"
+
+#include "MDLog.h"
+#include "MDSMap.h"
+
+#include "events/EUpdate.h"
+#include "events/EOpen.h"
+
+#include "msg/Messenger.h"
+#include "osdc/Objecter.h"
+
+#include "messages/MInodeFileCaps.h"
+#include "messages/MLock.h"
+#include "messages/MClientLease.h"
+#include "messages/MClientReply.h"
+#include "messages/MClientCaps.h"
+#include "messages/MClientCapRelease.h"
+
+#include "messages/MMDSSlaveRequest.h"
+
+#include <errno.h>
+
+#include "common/config.h"
+
+
+#define dout_subsys ceph_subsys_mds
+#undef dout_prefix
+#define dout_context g_ceph_context
+#define dout_prefix _prefix(_dout, mds)
+static ostream& _prefix(std::ostream *_dout, MDSRank *mds) {
+ return *_dout << "mds." << mds->get_nodeid() << ".locker ";
+}
+
+
+class LockerContext : public MDSInternalContextBase {
+protected:
+ Locker *locker;
+ MDSRank *get_mds() override
+ {
+ return locker->mds;
+ }
+
+public:
+ explicit LockerContext(Locker *locker_) : locker(locker_) {
+ assert(locker != NULL);
+ }
+};
+
+class LockerLogContext : public MDSLogContextBase {
+protected:
+ Locker *locker;
+ MDSRank *get_mds() override
+ {
+ return locker->mds;
+ }
+
+public:
+ explicit LockerLogContext(Locker *locker_) : locker(locker_) {
+ assert(locker != NULL);
+ }
+};
+
+/* This function DOES put the passed message before returning */
+void Locker::dispatch(Message *m)
+{
+
+ switch (m->get_type()) {
+
+ // inter-mds locking
+ case MSG_MDS_LOCK:
+ handle_lock(static_cast<MLock*>(m));
+ break;
+ // inter-mds caps
+ case MSG_MDS_INODEFILECAPS:
+ handle_inode_file_caps(static_cast<MInodeFileCaps*>(m));
+ break;
+
+ // client sync
+ case CEPH_MSG_CLIENT_CAPS:
+ handle_client_caps(static_cast<MClientCaps*>(m));
+
+ break;
+ case CEPH_MSG_CLIENT_CAPRELEASE:
+ handle_client_cap_release(static_cast<MClientCapRelease*>(m));
+ break;
+ case CEPH_MSG_CLIENT_LEASE:
+ handle_client_lease(static_cast<MClientLease*>(m));
+ break;
+
+ default:
+ derr << "locker unknown message " << m->get_type() << dendl;
+ assert(0 == "locker unknown message");
+ }
+}
+
+void Locker::tick()
+{
+ scatter_tick();
+ caps_tick();
+}
+
+/*
+ * locks vs rejoin
+ *
+ *
+ *
+ */
+
+void Locker::send_lock_message(SimpleLock *lock, int msg)
+{
+ for (const auto &it : lock->get_parent()->get_replicas()) {
+ if (mds->is_cluster_degraded() &&
+ mds->mdsmap->get_state(it.first) < MDSMap::STATE_REJOIN)
+ continue;
+ MLock *m = new MLock(lock, msg, mds->get_nodeid());
+ mds->send_message_mds(m, it.first);
+ }
+}
+
+void Locker::send_lock_message(SimpleLock *lock, int msg, const bufferlist &data)
+{
+ for (const auto &it : lock->get_parent()->get_replicas()) {
+ if (mds->is_cluster_degraded() &&
+ mds->mdsmap->get_state(it.first) < MDSMap::STATE_REJOIN)
+ continue;
+ MLock *m = new MLock(lock, msg, mds->get_nodeid());
+ m->set_data(data);
+ mds->send_message_mds(m, it.first);
+ }
+}
+
+
+
+
+void Locker::include_snap_rdlocks(set<SimpleLock*>& rdlocks, CInode *in)
+{
+ // rdlock ancestor snaps
+ CInode *t = in;
+ rdlocks.insert(&in->snaplock);
+ while (t->get_projected_parent_dn()) {
+ t = t->get_projected_parent_dn()->get_dir()->get_inode();
+ rdlocks.insert(&t->snaplock);
+ }
+}
+
+void Locker::include_snap_rdlocks_wlayout(set<SimpleLock*>& rdlocks, CInode *in,
+ file_layout_t **layout)
+{
+ //rdlock ancestor snaps
+ CInode *t = in;
+ rdlocks.insert(&in->snaplock);
+ rdlocks.insert(&in->policylock);
+ bool found_layout = false;
+ while (t) {
+ rdlocks.insert(&t->snaplock);
+ if (!found_layout) {
+ rdlocks.insert(&t->policylock);
+ if (t->get_projected_inode()->has_layout()) {
+ *layout = &t->get_projected_inode()->layout;
+ found_layout = true;
+ }
+ }
+ if (t->get_projected_parent_dn() &&
+ t->get_projected_parent_dn()->get_dir())
+ t = t->get_projected_parent_dn()->get_dir()->get_inode();
+ else t = NULL;
+ }
+}
+
+struct MarkEventOnDestruct {
+ MDRequestRef& mdr;
+ const char* message;
+ bool mark_event;
+ MarkEventOnDestruct(MDRequestRef& _mdr,
+ const char *_message) : mdr(_mdr),
+ message(_message),
+ mark_event(true) {}
+ ~MarkEventOnDestruct() {
+ if (mark_event)
+ mdr->mark_event(message);
+ }
+};
+
+/* If this function returns false, the mdr has been placed
+ * on the appropriate wait list */
+bool Locker::acquire_locks(MDRequestRef& mdr,
+ set<SimpleLock*> &rdlocks,
+ set<SimpleLock*> &wrlocks,
+ set<SimpleLock*> &xlocks,
+ map<SimpleLock*,mds_rank_t> *remote_wrlocks,
+ CInode *auth_pin_freeze,
+ bool auth_pin_nonblock)
+{
+ if (mdr->done_locking &&
+ !mdr->is_slave()) { // not on slaves! master requests locks piecemeal.
+ dout(10) << "acquire_locks " << *mdr << " - done locking" << dendl;
+ return true; // at least we had better be!
+ }
+ dout(10) << "acquire_locks " << *mdr << dendl;
+
+ MarkEventOnDestruct marker(mdr, "failed to acquire_locks");
+
+ client_t client = mdr->get_client();
+
+ set<SimpleLock*, SimpleLock::ptr_lt> sorted; // sort everything we will lock
+ set<MDSCacheObject*> mustpin; // items to authpin
+
+ // xlocks
+ for (set<SimpleLock*>::iterator p = xlocks.begin(); p != xlocks.end(); ++p) {
+ dout(20) << " must xlock " << **p << " " << *(*p)->get_parent() << dendl;
+ sorted.insert(*p);
+ mustpin.insert((*p)->get_parent());
+
+ // augment xlock with a versionlock?
+ if ((*p)->get_type() == CEPH_LOCK_DN) {
+ CDentry *dn = (CDentry*)(*p)->get_parent();
+ if (!dn->is_auth())
+ continue;
+
+ if (xlocks.count(&dn->versionlock))
+ continue; // we're xlocking the versionlock too; don't wrlock it!
+
+ if (mdr->is_master()) {
+ // master. wrlock versionlock so we can pipeline dentry updates to journal.
+ wrlocks.insert(&dn->versionlock);
+ } else {
+ // slave. exclusively lock the dentry version (i.e. block other journal updates).
+ // this makes rollback safe.
+ xlocks.insert(&dn->versionlock);
+ sorted.insert(&dn->versionlock);
+ }
+ }
+ if ((*p)->get_type() > CEPH_LOCK_IVERSION) {
+ // inode version lock?
+ CInode *in = (CInode*)(*p)->get_parent();
+ if (!in->is_auth())
+ continue;
+ if (mdr->is_master()) {
+ // master. wrlock versionlock so we can pipeline inode updates to journal.
+ wrlocks.insert(&in->versionlock);
+ } else {
+ // slave. exclusively lock the inode version (i.e. block other journal updates).
+ // this makes rollback safe.
+ xlocks.insert(&in->versionlock);
+ sorted.insert(&in->versionlock);
+ }
+ }
+ }
+
+ // wrlocks
+ for (set<SimpleLock*>::iterator p = wrlocks.begin(); p != wrlocks.end(); ++p) {
+ MDSCacheObject *object = (*p)->get_parent();
+ dout(20) << " must wrlock " << **p << " " << *object << dendl;
+ sorted.insert(*p);
+ if (object->is_auth())
+ mustpin.insert(object);
+ else if (!object->is_auth() &&
+ !(*p)->can_wrlock(client) && // we might have to request a scatter
+ !mdr->is_slave()) { // if we are slave (remote_wrlock), the master already authpinned
+ dout(15) << " will also auth_pin " << *object
+ << " in case we need to request a scatter" << dendl;
+ mustpin.insert(object);
+ }
+ }
+
+ // remote_wrlocks
+ if (remote_wrlocks) {
+ for (map<SimpleLock*,mds_rank_t>::iterator p = remote_wrlocks->begin(); p != remote_wrlocks->end(); ++p) {
+ MDSCacheObject *object = p->first->get_parent();
+ dout(20) << " must remote_wrlock on mds." << p->second << " "
+ << *p->first << " " << *object << dendl;
+ sorted.insert(p->first);
+ mustpin.insert(object);
+ }
+ }
+
+ // rdlocks
+ for (set<SimpleLock*>::iterator p = rdlocks.begin();
+ p != rdlocks.end();
+ ++p) {
+ MDSCacheObject *object = (*p)->get_parent();
+ dout(20) << " must rdlock " << **p << " " << *object << dendl;
+ sorted.insert(*p);
+ if (object->is_auth())
+ mustpin.insert(object);
+ else if (!object->is_auth() &&
+ !(*p)->can_rdlock(client)) { // we might have to request an rdlock
+ dout(15) << " will also auth_pin " << *object
+ << " in case we need to request a rdlock" << dendl;
+ mustpin.insert(object);
+ }
+ }
+
+
+ // AUTH PINS
+ map<mds_rank_t, set<MDSCacheObject*> > mustpin_remote; // mds -> (object set)
+
+ // can i auth pin them all now?
+ marker.message = "failed to authpin local pins";
+ for (set<MDSCacheObject*>::iterator p = mustpin.begin();
+ p != mustpin.end();
+ ++p) {
+ MDSCacheObject *object = *p;
+
+ dout(10) << " must authpin " << *object << dendl;
+
+ if (mdr->is_auth_pinned(object)) {
+ if (object != (MDSCacheObject*)auth_pin_freeze)
+ continue;
+ if (mdr->more()->is_remote_frozen_authpin) {
+ if (mdr->more()->rename_inode == auth_pin_freeze)
+ continue;
+ // unfreeze auth pin for the wrong inode
+ mustpin_remote[mdr->more()->rename_inode->authority().first].size();
+ }
+ }
+
+ if (!object->is_auth()) {
+ if (!mdr->locks.empty())
+ drop_locks(mdr.get());
+ if (object->is_ambiguous_auth()) {
+ // wait
+ dout(10) << " ambiguous auth, waiting to authpin " << *object << dendl;
+ object->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_MDS_RetryRequest(mdcache, mdr));
+ mdr->drop_local_auth_pins();
+ return false;
+ }
+ mustpin_remote[object->authority().first].insert(object);
+ continue;
+ }
+ if (!object->can_auth_pin()) {
+ // wait
+ drop_locks(mdr.get());
+ mdr->drop_local_auth_pins();
+ if (auth_pin_nonblock) {
+ dout(10) << " can't auth_pin (freezing?) " << *object << ", nonblocking" << dendl;
+ mdr->aborted = true;
+ return false;
+ }
+ dout(10) << " can't auth_pin (freezing?), waiting to authpin " << *object << dendl;
+ object->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr));
+
+ if (!mdr->remote_auth_pins.empty())
+ notify_freeze_waiter(object);
+
+ return false;
+ }
+ }
+
+ // ok, grab local auth pins
+ for (set<MDSCacheObject*>::iterator p = mustpin.begin();
+ p != mustpin.end();
+ ++p) {
+ MDSCacheObject *object = *p;
+ if (mdr->is_auth_pinned(object)) {
+ dout(10) << " already auth_pinned " << *object << dendl;
+ } else if (object->is_auth()) {
+ dout(10) << " auth_pinning " << *object << dendl;
+ mdr->auth_pin(object);
+ }
+ }
+
+ // request remote auth_pins
+ if (!mustpin_remote.empty()) {
+ marker.message = "requesting remote authpins";
+ for (map<MDSCacheObject*,mds_rank_t>::iterator p = mdr->remote_auth_pins.begin();
+ p != mdr->remote_auth_pins.end();
+ ++p) {
+ if (mustpin.count(p->first)) {
+ assert(p->second == p->first->authority().first);
+ map<mds_rank_t, set<MDSCacheObject*> >::iterator q = mustpin_remote.find(p->second);
+ if (q != mustpin_remote.end())
+ q->second.insert(p->first);
+ }
+ }
+ for (map<mds_rank_t, set<MDSCacheObject*> >::iterator p = mustpin_remote.begin();
+ p != mustpin_remote.end();
+ ++p) {
+ dout(10) << "requesting remote auth_pins from mds." << p->first << dendl;
+
+ // wait for active auth
+ if (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(p->first)) {
+ dout(10) << " mds." << p->first << " is not active" << dendl;
+ if (mdr->more()->waiting_on_slave.empty())
+ mds->wait_for_active_peer(p->first, new C_MDS_RetryRequest(mdcache, mdr));
+ return false;
+ }
+
+ MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt,
+ MMDSSlaveRequest::OP_AUTHPIN);
+ for (set<MDSCacheObject*>::iterator q = p->second.begin();
+ q != p->second.end();
+ ++q) {
+ dout(10) << " req remote auth_pin of " << **q << dendl;
+ MDSCacheObjectInfo info;
+ (*q)->set_object_info(info);
+ req->get_authpins().push_back(info);
+ if (*q == auth_pin_freeze)
+ (*q)->set_object_info(req->get_authpin_freeze());
+ mdr->pin(*q);
+ }
+ if (auth_pin_nonblock)
+ req->mark_nonblock();
+ mds->send_message_mds(req, p->first);
+
+ // put in waiting list
+ assert(mdr->more()->waiting_on_slave.count(p->first) == 0);
+ mdr->more()->waiting_on_slave.insert(p->first);
+ }
+ return false;
+ }
+
+ // caps i'll need to issue
+ set<CInode*> issue_set;
+ bool result = false;
+
+ // acquire locks.
+ // make sure they match currently acquired locks.
+ set<SimpleLock*, SimpleLock::ptr_lt>::iterator existing = mdr->locks.begin();
+ for (set<SimpleLock*, SimpleLock::ptr_lt>::iterator p = sorted.begin();
+ p != sorted.end();
+ ++p) {
+ bool need_wrlock = !!wrlocks.count(*p);
+ bool need_remote_wrlock = !!(remote_wrlocks && remote_wrlocks->count(*p));
+
+ // already locked?
+ if (existing != mdr->locks.end() && *existing == *p) {
+ // right kind?
+ SimpleLock *have = *existing;
+ ++existing;
+ if (xlocks.count(have) && mdr->xlocks.count(have)) {
+ dout(10) << " already xlocked " << *have << " " << *have->get_parent() << dendl;
+ continue;
+ }
+ if (mdr->remote_wrlocks.count(have)) {
+ if (!need_remote_wrlock ||
+ mdr->remote_wrlocks[have] != (*remote_wrlocks)[have]) {
+ dout(10) << " unlocking remote_wrlock on wrong mds." << mdr->remote_wrlocks[have]
+ << " " << *have << " " << *have->get_parent() << dendl;
+ remote_wrlock_finish(have, mdr->remote_wrlocks[have], mdr.get());
+ }
+ }
+ if (need_wrlock || need_remote_wrlock) {
+ if (need_wrlock == !!mdr->wrlocks.count(have) &&
+ need_remote_wrlock == !!mdr->remote_wrlocks.count(have)) {
+ if (need_wrlock)
+ dout(10) << " already wrlocked " << *have << " " << *have->get_parent() << dendl;
+ if (need_remote_wrlock)
+ dout(10) << " already remote_wrlocked " << *have << " " << *have->get_parent() << dendl;
+ continue;
+ }
+ }
+ if (rdlocks.count(have) && mdr->rdlocks.count(have)) {
+ dout(10) << " already rdlocked " << *have << " " << *have->get_parent() << dendl;
+ continue;
+ }
+ }
+
+ // hose any stray locks
+ if (existing != mdr->locks.end() && *existing == *p) {
+ assert(need_wrlock || need_remote_wrlock);
+ SimpleLock *lock = *existing;
+ if (mdr->wrlocks.count(lock)) {
+ if (!need_wrlock)
+ dout(10) << " unlocking extra " << *lock << " " << *lock->get_parent() << dendl;
+ else if (need_remote_wrlock) // acquire remote_wrlock first
+ dout(10) << " unlocking out-of-order " << *lock << " " << *lock->get_parent() << dendl;
+ bool need_issue = false;
+ wrlock_finish(lock, mdr.get(), &need_issue);
+ if (need_issue)
+ issue_set.insert(static_cast<CInode*>(lock->get_parent()));
+ }
+ ++existing;
+ }
+ while (existing != mdr->locks.end()) {
+ SimpleLock *stray = *existing;
+ ++existing;
+ dout(10) << " unlocking out-of-order " << *stray << " " << *stray->get_parent() << dendl;
+ bool need_issue = false;
+ if (mdr->xlocks.count(stray)) {
+ xlock_finish(stray, mdr.get(), &need_issue);
+ } else if (mdr->rdlocks.count(stray)) {
+ rdlock_finish(stray, mdr.get(), &need_issue);
+ } else {
+ // may have acquired both wrlock and remore wrlock
+ if (mdr->wrlocks.count(stray))
+ wrlock_finish(stray, mdr.get(), &need_issue);
+ if (mdr->remote_wrlocks.count(stray))
+ remote_wrlock_finish(stray, mdr->remote_wrlocks[stray], mdr.get());
+ }
+ if (need_issue)
+ issue_set.insert(static_cast<CInode*>(stray->get_parent()));
+ }
+
+ // lock
+ if (mdr->locking && *p != mdr->locking) {
+ cancel_locking(mdr.get(), &issue_set);
+ }
+ if (xlocks.count(*p)) {
+ marker.message = "failed to xlock, waiting";
+ if (!xlock_start(*p, mdr))
+ goto out;
+ dout(10) << " got xlock on " << **p << " " << *(*p)->get_parent() << dendl;
+ } else if (need_wrlock || need_remote_wrlock) {
+ if (need_remote_wrlock && !mdr->remote_wrlocks.count(*p)) {
+ marker.message = "waiting for remote wrlocks";
+ remote_wrlock_start(*p, (*remote_wrlocks)[*p], mdr);
+ goto out;
+ }
+ if (need_wrlock && !mdr->wrlocks.count(*p)) {
+ marker.message = "failed to wrlock, waiting";
+ if (need_remote_wrlock && !(*p)->can_wrlock(mdr->get_client())) {
+ marker.message = "failed to wrlock, dropping remote wrlock and waiting";
+ // can't take the wrlock because the scatter lock is gathering. need to
+ // release the remote wrlock, so that the gathering process can finish.
+ remote_wrlock_finish(*p, mdr->remote_wrlocks[*p], mdr.get());
+ remote_wrlock_start(*p, (*remote_wrlocks)[*p], mdr);
+ goto out;
+ }
+ // nowait if we have already gotten remote wrlock
+ if (!wrlock_start(*p, mdr, need_remote_wrlock))
+ goto out;
+ dout(10) << " got wrlock on " << **p << " " << *(*p)->get_parent() << dendl;
+ }
+ } else {
+ assert(mdr->is_master());
+ if ((*p)->is_scatterlock()) {
+ ScatterLock *slock = static_cast<ScatterLock *>(*p);
+ if (slock->is_rejoin_mix()) {
+ // If there is a recovering mds who replcated an object when it failed
+ // and scatterlock in the object was in MIX state, It's possible that
+ // the recovering mds needs to take wrlock on the scatterlock when it
+ // replays unsafe requests. So this mds should delay taking rdlock on
+ // the scatterlock until the recovering mds finishes replaying unsafe.
+ // Otherwise unsafe requests may get replayed after current request.
+ //
+ // For example:
+ // The recovering mds is auth mds of a dirfrag, this mds is auth mds
+ // of correspinding inode. when 'rm -rf' the direcotry, this mds should
+ // delay the rmdir request until the recovering mds has replayed unlink
+ // requests.
+ if (mds->is_cluster_degraded()) {
+ if (!mdr->is_replay()) {
+ drop_locks(mdr.get());
+ mds->wait_for_cluster_recovered(new C_MDS_RetryRequest(mdcache, mdr));
+ dout(10) << " rejoin mix scatterlock " << *slock << " " << *(*p)->get_parent()
+ << ", waiting for cluster recovered" << dendl;
+ marker.message = "rejoin mix scatterlock, waiting for cluster recovered";
+ return false;
+ }
+ } else {
+ slock->clear_rejoin_mix();
+ }
+ }
+ }
+
+ marker.message = "failed to rdlock, waiting";
+ if (!rdlock_start(*p, mdr))
+ goto out;
+ dout(10) << " got rdlock on " << **p << " " << *(*p)->get_parent() << dendl;
+ }
+ }
+
+ // any extra unneeded locks?
+ while (existing != mdr->locks.end()) {
+ SimpleLock *stray = *existing;
+ ++existing;
+ dout(10) << " unlocking extra " << *stray << " " << *stray->get_parent() << dendl;
+ bool need_issue = false;
+ if (mdr->xlocks.count(stray)) {
+ xlock_finish(stray, mdr.get(), &need_issue);
+ } else if (mdr->rdlocks.count(stray)) {
+ rdlock_finish(stray, mdr.get(), &need_issue);
+ } else {
+ // may have acquired both wrlock and remore wrlock
+ if (mdr->wrlocks.count(stray))
+ wrlock_finish(stray, mdr.get(), &need_issue);
+ if (mdr->remote_wrlocks.count(stray))
+ remote_wrlock_finish(stray, mdr->remote_wrlocks[stray], mdr.get());
+ }
+ if (need_issue)
+ issue_set.insert(static_cast<CInode*>(stray->get_parent()));
+ }
+
+ mdr->done_locking = true;
+ mdr->set_mds_stamp(ceph_clock_now());
+ result = true;
+ marker.message = "acquired locks";
+
+ out:
+ issue_caps_set(issue_set);
+ return result;
+}
+
+void Locker::notify_freeze_waiter(MDSCacheObject *o)
+{
+ CDir *dir = NULL;
+ if (CInode *in = dynamic_cast<CInode*>(o)) {
+ if (!in->is_root())
+ dir = in->get_parent_dir();
+ } else if (CDentry *dn = dynamic_cast<CDentry*>(o)) {
+ dir = dn->get_dir();
+ } else {
+ dir = dynamic_cast<CDir*>(o);
+ assert(dir);
+ }
+ if (dir) {
+ if (dir->is_freezing_dir())
+ mdcache->fragment_freeze_inc_num_waiters(dir);
+ if (dir->is_freezing_tree()) {
+ while (!dir->is_freezing_tree_root())
+ dir = dir->get_parent_dir();
+ mdcache->migrator->export_freeze_inc_num_waiters(dir);
+ }
+ }
+}
+
+void Locker::set_xlocks_done(MutationImpl *mut, bool skip_dentry)
+{
+ for (set<SimpleLock*>::iterator p = mut->xlocks.begin();
+ p != mut->xlocks.end();
+ ++p) {
+ MDSCacheObject *object = (*p)->get_parent();
+ assert(object->is_auth());
+ if (skip_dentry &&
+ ((*p)->get_type() == CEPH_LOCK_DN || (*p)->get_type() == CEPH_LOCK_DVERSION))
+ continue;
+ dout(10) << "set_xlocks_done on " << **p << " " << *object << dendl;
+ (*p)->set_xlock_done();
+ }
+}
+
+void Locker::_drop_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue)
+{
+ while (!mut->rdlocks.empty()) {
+ bool ni = false;
+ MDSCacheObject *p = (*mut->rdlocks.begin())->get_parent();
+ rdlock_finish(*mut->rdlocks.begin(), mut, &ni);
+ if (ni)
+ pneed_issue->insert(static_cast<CInode*>(p));
+ }
+}
+
+void Locker::_drop_non_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue)
+{
+ set<mds_rank_t> slaves;
+
+ while (!mut->xlocks.empty()) {
+ SimpleLock *lock = *mut->xlocks.begin();
+ MDSCacheObject *p = lock->get_parent();
+ if (!p->is_auth()) {
+ assert(lock->get_sm()->can_remote_xlock);
+ slaves.insert(p->authority().first);
+ lock->put_xlock();
+ mut->locks.erase(lock);
+ mut->xlocks.erase(lock);
+ continue;
+ }
+ bool ni = false;
+ xlock_finish(lock, mut, &ni);
+ if (ni)
+ pneed_issue->insert(static_cast<CInode*>(p));
+ }
+
+ while (!mut->remote_wrlocks.empty()) {
+ map<SimpleLock*,mds_rank_t>::iterator p = mut->remote_wrlocks.begin();
+ slaves.insert(p->second);
+ if (mut->wrlocks.count(p->first) == 0)
+ mut->locks.erase(p->first);
+ mut->remote_wrlocks.erase(p);
+ }
+
+ while (!mut->wrlocks.empty()) {
+ bool ni = false;
+ MDSCacheObject *p = (*mut->wrlocks.begin())->get_parent();
+ wrlock_finish(*mut->wrlocks.begin(), mut, &ni);
+ if (ni)
+ pneed_issue->insert(static_cast<CInode*>(p));
+ }
+
+ for (set<mds_rank_t>::iterator p = slaves.begin(); p != slaves.end(); ++p) {
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->get_state(*p) >= MDSMap::STATE_REJOIN) {
+ dout(10) << "_drop_non_rdlocks dropping remote locks on mds." << *p << dendl;
+ MMDSSlaveRequest *slavereq = new MMDSSlaveRequest(mut->reqid, mut->attempt,
+ MMDSSlaveRequest::OP_DROPLOCKS);
+ mds->send_message_mds(slavereq, *p);
+ }
+ }
+}
+
+void Locker::cancel_locking(MutationImpl *mut, set<CInode*> *pneed_issue)
+{
+ SimpleLock *lock = mut->locking;
+ assert(lock);
+ dout(10) << "cancel_locking " << *lock << " on " << *mut << dendl;
+
+ if (lock->get_parent()->is_auth()) {
+ bool need_issue = false;
+ if (lock->get_state() == LOCK_PREXLOCK) {
+ _finish_xlock(lock, -1, &need_issue);
+ } else if (lock->get_state() == LOCK_LOCK_XLOCK &&
+ lock->get_num_xlocks() == 0) {
+ lock->set_state(LOCK_XLOCKDONE);
+ eval_gather(lock, true, &need_issue);
+ }
+ if (need_issue)
+ pneed_issue->insert(static_cast<CInode *>(lock->get_parent()));
+ }
+ mut->finish_locking(lock);
+}
+
+void Locker::drop_locks(MutationImpl *mut, set<CInode*> *pneed_issue)
+{
+ // leftover locks
+ set<CInode*> my_need_issue;
+ if (!pneed_issue)
+ pneed_issue = &my_need_issue;
+
+ if (mut->locking)
+ cancel_locking(mut, pneed_issue);
+ _drop_non_rdlocks(mut, pneed_issue);
+ _drop_rdlocks(mut, pneed_issue);
+
+ if (pneed_issue == &my_need_issue)
+ issue_caps_set(*pneed_issue);
+ mut->done_locking = false;
+}
+
+void Locker::drop_non_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue)
+{
+ set<CInode*> my_need_issue;
+ if (!pneed_issue)
+ pneed_issue = &my_need_issue;
+
+ _drop_non_rdlocks(mut, pneed_issue);
+
+ if (pneed_issue == &my_need_issue)
+ issue_caps_set(*pneed_issue);
+}
+
+void Locker::drop_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue)
+{
+ set<CInode*> my_need_issue;
+ if (!pneed_issue)
+ pneed_issue = &my_need_issue;
+
+ _drop_rdlocks(mut, pneed_issue);
+
+ if (pneed_issue == &my_need_issue)
+ issue_caps_set(*pneed_issue);
+}
+
+
+// generics
+
+void Locker::eval_gather(SimpleLock *lock, bool first, bool *pneed_issue, list<MDSInternalContextBase*> *pfinishers)
+{
+ dout(10) << "eval_gather " << *lock << " on " << *lock->get_parent() << dendl;
+ assert(!lock->is_stable());
+
+ int next = lock->get_next_state();
+
+ CInode *in = 0;
+ bool caps = lock->get_cap_shift();
+ if (lock->get_type() != CEPH_LOCK_DN)
+ in = static_cast<CInode *>(lock->get_parent());
+
+ bool need_issue = false;
+
+ int loner_issued = 0, other_issued = 0, xlocker_issued = 0;
+ assert(!caps || in != NULL);
+ if (caps && in->is_head()) {
+ in->get_caps_issued(&loner_issued, &other_issued, &xlocker_issued,
+ lock->get_cap_shift(), lock->get_cap_mask());
+ dout(10) << " next state is " << lock->get_state_name(next)
+ << " issued/allows loner " << gcap_string(loner_issued)
+ << "/" << gcap_string(lock->gcaps_allowed(CAP_LONER, next))
+ << " xlocker " << gcap_string(xlocker_issued)
+ << "/" << gcap_string(lock->gcaps_allowed(CAP_XLOCKER, next))
+ << " other " << gcap_string(other_issued)
+ << "/" << gcap_string(lock->gcaps_allowed(CAP_ANY, next))
+ << dendl;
+
+ if (first && ((~lock->gcaps_allowed(CAP_ANY, next) & other_issued) ||
+ (~lock->gcaps_allowed(CAP_LONER, next) & loner_issued) ||
+ (~lock->gcaps_allowed(CAP_XLOCKER, next) & xlocker_issued)))
+ need_issue = true;
+ }
+
+#define IS_TRUE_AND_LT_AUTH(x, auth) (x && ((auth && x <= AUTH) || (!auth && x < AUTH)))
+ bool auth = lock->get_parent()->is_auth();
+ if (!lock->is_gathering() &&
+ (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_rdlock, auth) || !lock->is_rdlocked()) &&
+ (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_wrlock, auth) || !lock->is_wrlocked()) &&
+ (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_xlock, auth) || !lock->is_xlocked()) &&
+ (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_lease, auth) || !lock->is_leased()) &&
+ !(lock->get_parent()->is_auth() && lock->is_flushing()) && // i.e. wait for scatter_writebehind!
+ (!caps || ((~lock->gcaps_allowed(CAP_ANY, next) & other_issued) == 0 &&
+ (~lock->gcaps_allowed(CAP_LONER, next) & loner_issued) == 0 &&
+ (~lock->gcaps_allowed(CAP_XLOCKER, next) & xlocker_issued) == 0)) &&
+ lock->get_state() != LOCK_SYNC_MIX2 && // these states need an explicit trigger from the auth mds
+ lock->get_state() != LOCK_MIX_SYNC2
+ ) {
+ dout(7) << "eval_gather finished gather on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+
+ if (lock->get_sm() == &sm_filelock) {
+ assert(in);
+ if (in->state_test(CInode::STATE_RECOVERING)) {
+ dout(7) << "eval_gather finished gather, but still recovering" << dendl;
+ return;
+ } else if (in->state_test(CInode::STATE_NEEDSRECOVER)) {
+ dout(7) << "eval_gather finished gather, but need to recover" << dendl;
+ mds->mdcache->queue_file_recover(in);
+ mds->mdcache->do_file_recover();
+ return;
+ }
+ }
+
+ if (!lock->get_parent()->is_auth()) {
+ // replica: tell auth
+ mds_rank_t auth = lock->get_parent()->authority().first;
+
+ if (lock->get_parent()->is_rejoining() &&
+ mds->mdsmap->get_state(auth) == MDSMap::STATE_REJOIN) {
+ dout(7) << "eval_gather finished gather, but still rejoining "
+ << *lock->get_parent() << dendl;
+ return;
+ }
+
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->get_state(auth) >= MDSMap::STATE_REJOIN) {
+ switch (lock->get_state()) {
+ case LOCK_SYNC_LOCK:
+ mds->send_message_mds(new MLock(lock, LOCK_AC_LOCKACK, mds->get_nodeid()),
+ auth);
+ break;
+
+ case LOCK_MIX_SYNC:
+ {
+ MLock *reply = new MLock(lock, LOCK_AC_SYNCACK, mds->get_nodeid());
+ lock->encode_locked_state(reply->get_data());
+ mds->send_message_mds(reply, auth);
+ next = LOCK_MIX_SYNC2;
+ (static_cast<ScatterLock *>(lock))->start_flush();
+ }
+ break;
+
+ case LOCK_MIX_SYNC2:
+ (static_cast<ScatterLock *>(lock))->finish_flush();
+ (static_cast<ScatterLock *>(lock))->clear_flushed();
+
+ case LOCK_SYNC_MIX2:
+ // do nothing, we already acked
+ break;
+
+ case LOCK_SYNC_MIX:
+ {
+ MLock *reply = new MLock(lock, LOCK_AC_MIXACK, mds->get_nodeid());
+ mds->send_message_mds(reply, auth);
+ next = LOCK_SYNC_MIX2;
+ }
+ break;
+
+ case LOCK_MIX_LOCK:
+ {
+ bufferlist data;
+ lock->encode_locked_state(data);
+ mds->send_message_mds(new MLock(lock, LOCK_AC_LOCKACK, mds->get_nodeid(), data), auth);
+ (static_cast<ScatterLock *>(lock))->start_flush();
+ // we'll get an AC_LOCKFLUSHED to complete
+ }
+ break;
+
+ default:
+ ceph_abort();
+ }
+ }
+ } else {
+ // auth
+
+ // once the first (local) stage of mix->lock gather complete we can
+ // gather from replicas
+ if (lock->get_state() == LOCK_MIX_LOCK &&
+ lock->get_parent()->is_replicated()) {
+ dout(10) << " finished (local) gather for mix->lock, now gathering from replicas" << dendl;
+ send_lock_message(lock, LOCK_AC_LOCK);
+ lock->init_gather();
+ lock->set_state(LOCK_MIX_LOCK2);
+ return;
+ }
+
+ if (lock->is_dirty() && !lock->is_flushed()) {
+ scatter_writebehind(static_cast<ScatterLock *>(lock));
+ mds->mdlog->flush();
+ return;
+ }
+ lock->clear_flushed();
+
+ switch (lock->get_state()) {
+ // to mixed
+ case LOCK_TSYN_MIX:
+ case LOCK_SYNC_MIX:
+ case LOCK_EXCL_MIX:
+ in->start_scatter(static_cast<ScatterLock *>(lock));
+ if (lock->get_parent()->is_replicated()) {
+ bufferlist softdata;
+ lock->encode_locked_state(softdata);
+ send_lock_message(lock, LOCK_AC_MIX, softdata);
+ }
+ (static_cast<ScatterLock *>(lock))->clear_scatter_wanted();
+ break;
+
+ case LOCK_XLOCK:
+ case LOCK_XLOCKDONE:
+ if (next != LOCK_SYNC)
+ break;
+ // fall-thru
+
+ // to sync
+ case LOCK_EXCL_SYNC:
+ case LOCK_LOCK_SYNC:
+ case LOCK_MIX_SYNC:
+ case LOCK_XSYN_SYNC:
+ if (lock->get_parent()->is_replicated()) {
+ bufferlist softdata;
+ lock->encode_locked_state(softdata);
+ send_lock_message(lock, LOCK_AC_SYNC, softdata);
+ }
+ break;
+ }
+
+ }
+
+ lock->set_state(next);
+
+ if (lock->get_parent()->is_auth() &&
+ lock->is_stable())
+ lock->get_parent()->auth_unpin(lock);
+
+ // drop loner before doing waiters
+ if (caps &&
+ in->is_head() &&
+ in->is_auth() &&
+ in->get_wanted_loner() != in->get_loner()) {
+ dout(10) << " trying to drop loner" << dendl;
+ if (in->try_drop_loner()) {
+ dout(10) << " dropped loner" << dendl;
+ need_issue = true;
+ }
+ }
+
+ if (pfinishers)
+ lock->take_waiting(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_WR|SimpleLock::WAIT_RD|SimpleLock::WAIT_XLOCK,
+ *pfinishers);
+ else
+ lock->finish_waiters(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_WR|SimpleLock::WAIT_RD|SimpleLock::WAIT_XLOCK);
+
+ if (caps && in->is_head())
+ need_issue = true;
+
+ if (lock->get_parent()->is_auth() &&
+ lock->is_stable())
+ try_eval(lock, &need_issue);
+ }
+
+ if (need_issue) {
+ if (pneed_issue)
+ *pneed_issue = true;
+ else if (in->is_head())
+ issue_caps(in);
+ }
+
+}
+
+bool Locker::eval(CInode *in, int mask, bool caps_imported)
+{
+ bool need_issue = caps_imported;
+ list<MDSInternalContextBase*> finishers;
+
+ dout(10) << "eval " << mask << " " << *in << dendl;
+
+ // choose loner?
+ if (in->is_auth() && in->is_head()) {
+ if (in->choose_ideal_loner() >= 0) {
+ if (in->try_set_loner()) {
+ dout(10) << "eval set loner to client." << in->get_loner() << dendl;
+ need_issue = true;
+ mask = -1;
+ } else
+ dout(10) << "eval want loner client." << in->get_wanted_loner() << " but failed to set it" << dendl;
+ } else
+ dout(10) << "eval doesn't want loner" << dendl;
+ }
+
+ retry:
+ if (mask & CEPH_LOCK_IFILE)
+ eval_any(&in->filelock, &need_issue, &finishers, caps_imported);
+ if (mask & CEPH_LOCK_IAUTH)
+ eval_any(&in->authlock, &need_issue, &finishers, caps_imported);
+ if (mask & CEPH_LOCK_ILINK)
+ eval_any(&in->linklock, &need_issue, &finishers, caps_imported);
+ if (mask & CEPH_LOCK_IXATTR)
+ eval_any(&in->xattrlock, &need_issue, &finishers, caps_imported);
+ if (mask & CEPH_LOCK_INEST)
+ eval_any(&in->nestlock, &need_issue, &finishers, caps_imported);
+ if (mask & CEPH_LOCK_IFLOCK)
+ eval_any(&in->flocklock, &need_issue, &finishers, caps_imported);
+ if (mask & CEPH_LOCK_IPOLICY)
+ eval_any(&in->policylock, &need_issue, &finishers, caps_imported);
+
+ // drop loner?
+ if (in->is_auth() && in->is_head() && in->get_wanted_loner() != in->get_loner()) {
+ dout(10) << " trying to drop loner" << dendl;
+ if (in->try_drop_loner()) {
+ dout(10) << " dropped loner" << dendl;
+ need_issue = true;
+
+ if (in->get_wanted_loner() >= 0) {
+ if (in->try_set_loner()) {
+ dout(10) << "eval end set loner to client." << in->get_loner() << dendl;
+ mask = -1;
+ goto retry;
+ } else {
+ dout(10) << "eval want loner client." << in->get_wanted_loner() << " but failed to set it" << dendl;
+ }
+ }
+ }
+ }
+
+ finish_contexts(g_ceph_context, finishers);
+
+ if (need_issue && in->is_head())
+ issue_caps(in);
+
+ dout(10) << "eval done" << dendl;
+ return need_issue;
+}
+
+class C_Locker_Eval : public LockerContext {
+ MDSCacheObject *p;
+ int mask;
+public:
+ C_Locker_Eval(Locker *l, MDSCacheObject *pp, int m) : LockerContext(l), p(pp), mask(m) {
+ // We are used as an MDSCacheObject waiter, so should
+ // only be invoked by someone already holding the big lock.
+ assert(locker->mds->mds_lock.is_locked_by_me());
+ p->get(MDSCacheObject::PIN_PTRWAITER);
+ }
+ void finish(int r) override {
+ locker->try_eval(p, mask);
+ p->put(MDSCacheObject::PIN_PTRWAITER);
+ }
+};
+
+void Locker::try_eval(MDSCacheObject *p, int mask)
+{
+ // unstable and ambiguous auth?
+ if (p->is_ambiguous_auth()) {
+ dout(7) << "try_eval ambiguous auth, waiting on " << *p << dendl;
+ p->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_Locker_Eval(this, p, mask));
+ return;
+ }
+
+ if (p->is_auth() && p->is_frozen()) {
+ dout(7) << "try_eval frozen, waiting on " << *p << dendl;
+ p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_Eval(this, p, mask));
+ return;
+ }
+
+ if (mask & CEPH_LOCK_DN) {
+ assert(mask == CEPH_LOCK_DN);
+ bool need_issue = false; // ignore this, no caps on dentries
+ CDentry *dn = static_cast<CDentry *>(p);
+ eval_any(&dn->lock, &need_issue);
+ } else {
+ CInode *in = static_cast<CInode *>(p);
+ eval(in, mask);
+ }
+}
+
+void Locker::try_eval(SimpleLock *lock, bool *pneed_issue)
+{
+ MDSCacheObject *p = lock->get_parent();
+
+ // unstable and ambiguous auth?
+ if (p->is_ambiguous_auth()) {
+ dout(7) << "try_eval " << *lock << " ambiguousauth, waiting on " << *p << dendl;
+ p->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_Locker_Eval(this, p, lock->get_type()));
+ return;
+ }
+
+ if (!p->is_auth()) {
+ dout(7) << "try_eval " << *lock << " not auth for " << *p << dendl;
+ return;
+ }
+
+ if (p->is_frozen()) {
+ dout(7) << "try_eval " << *lock << " frozen, waiting on " << *p << dendl;
+ p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_Eval(this, p, lock->get_type()));
+ return;
+ }
+
+ /*
+ * We could have a situation like:
+ *
+ * - mds A authpins item on mds B
+ * - mds B starts to freeze tree containing item
+ * - mds A tries wrlock_start on A, sends REQSCATTER to B
+ * - mds B lock is unstable, sets scatter_wanted
+ * - mds B lock stabilizes, calls try_eval.
+ *
+ * We can defer while freezing without causing a deadlock. Honor
+ * scatter_wanted flag here. This will never get deferred by the
+ * checks above due to the auth_pin held by the master.
+ */
+ if (lock->is_scatterlock()) {
+ ScatterLock *slock = static_cast<ScatterLock *>(lock);
+ if (slock->get_scatter_wanted() &&
+ slock->get_state() != LOCK_MIX) {
+ scatter_mix(slock, pneed_issue);
+ if (!lock->is_stable())
+ return;
+ } else if (slock->get_unscatter_wanted() &&
+ slock->get_state() != LOCK_LOCK) {
+ simple_lock(slock, pneed_issue);
+ if (!lock->is_stable()) {
+ return;
+ }
+ }
+ }
+
+ if (lock->get_type() != CEPH_LOCK_DN && p->is_freezing()) {
+ dout(7) << "try_eval " << *lock << " freezing, waiting on " << *p << dendl;
+ p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_Eval(this, p, lock->get_type()));
+ return;
+ }
+
+ eval(lock, pneed_issue);
+}
+
+void Locker::eval_cap_gather(CInode *in, set<CInode*> *issue_set)
+{
+ bool need_issue = false;
+ list<MDSInternalContextBase*> finishers;
+
+ // kick locks now
+ if (!in->filelock.is_stable())
+ eval_gather(&in->filelock, false, &need_issue, &finishers);
+ if (!in->authlock.is_stable())
+ eval_gather(&in->authlock, false, &need_issue, &finishers);
+ if (!in->linklock.is_stable())
+ eval_gather(&in->linklock, false, &need_issue, &finishers);
+ if (!in->xattrlock.is_stable())
+ eval_gather(&in->xattrlock, false, &need_issue, &finishers);
+
+ if (need_issue && in->is_head()) {
+ if (issue_set)
+ issue_set->insert(in);
+ else
+ issue_caps(in);
+ }
+
+ finish_contexts(g_ceph_context, finishers);
+}
+
+void Locker::eval_scatter_gathers(CInode *in)
+{
+ bool need_issue = false;
+ list<MDSInternalContextBase*> finishers;
+
+ dout(10) << "eval_scatter_gathers " << *in << dendl;
+
+ // kick locks now
+ if (!in->filelock.is_stable())
+ eval_gather(&in->filelock, false, &need_issue, &finishers);
+ if (!in->nestlock.is_stable())
+ eval_gather(&in->nestlock, false, &need_issue, &finishers);
+ if (!in->dirfragtreelock.is_stable())
+ eval_gather(&in->dirfragtreelock, false, &need_issue, &finishers);
+
+ if (need_issue && in->is_head())
+ issue_caps(in);
+
+ finish_contexts(g_ceph_context, finishers);
+}
+
+void Locker::eval(SimpleLock *lock, bool *need_issue)
+{
+ switch (lock->get_type()) {
+ case CEPH_LOCK_IFILE:
+ return file_eval(static_cast<ScatterLock*>(lock), need_issue);
+ case CEPH_LOCK_IDFT:
+ case CEPH_LOCK_INEST:
+ return scatter_eval(static_cast<ScatterLock*>(lock), need_issue);
+ default:
+ return simple_eval(lock, need_issue);
+ }
+}
+
+
+// ------------------
+// rdlock
+
+bool Locker::_rdlock_kick(SimpleLock *lock, bool as_anon)
+{
+ // kick the lock
+ if (lock->is_stable()) {
+ if (lock->get_parent()->is_auth()) {
+ if (lock->get_sm() == &sm_scatterlock) {
+ // not until tempsync is fully implemented
+ //if (lock->get_parent()->is_replicated())
+ //scatter_tempsync((ScatterLock*)lock);
+ //else
+ simple_sync(lock);
+ } else if (lock->get_sm() == &sm_filelock) {
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ if (lock->get_state() == LOCK_EXCL &&
+ in->get_target_loner() >= 0 &&
+ !in->is_dir() && !as_anon) // as_anon => caller wants SYNC, not XSYN
+ file_xsyn(lock);
+ else
+ simple_sync(lock);
+ } else
+ simple_sync(lock);
+ return true;
+ } else {
+ // request rdlock state change from auth
+ mds_rank_t auth = lock->get_parent()->authority().first;
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) {
+ dout(10) << "requesting rdlock from auth on "
+ << *lock << " on " << *lock->get_parent() << dendl;
+ mds->send_message_mds(new MLock(lock, LOCK_AC_REQRDLOCK, mds->get_nodeid()), auth);
+ }
+ return false;
+ }
+ }
+ if (lock->get_type() == CEPH_LOCK_IFILE) {
+ CInode *in = static_cast<CInode *>(lock->get_parent());
+ if (in->state_test(CInode::STATE_RECOVERING)) {
+ mds->mdcache->recovery_queue.prioritize(in);
+ }
+ }
+
+ return false;
+}
+
+bool Locker::rdlock_try(SimpleLock *lock, client_t client, MDSInternalContextBase *con)
+{
+ dout(7) << "rdlock_try on " << *lock << " on " << *lock->get_parent() << dendl;
+
+ // can read? grab ref.
+ if (lock->can_rdlock(client))
+ return true;
+
+ _rdlock_kick(lock, false);
+
+ if (lock->can_rdlock(client))
+ return true;
+
+ // wait!
+ if (con) {
+ dout(7) << "rdlock_try waiting on " << *lock << " on " << *lock->get_parent() << dendl;
+ lock->add_waiter(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_RD, con);
+ }
+ return false;
+}
+
+bool Locker::rdlock_start(SimpleLock *lock, MDRequestRef& mut, bool as_anon)
+{
+ dout(7) << "rdlock_start on " << *lock << " on " << *lock->get_parent() << dendl;
+
+ // client may be allowed to rdlock the same item it has xlocked.
+ // UNLESS someone passes in as_anon, or we're reading snapped version here.
+ if (mut->snapid != CEPH_NOSNAP)
+ as_anon = true;
+ client_t client = as_anon ? -1 : mut->get_client();
+
+ CInode *in = 0;
+ if (lock->get_type() != CEPH_LOCK_DN)
+ in = static_cast<CInode *>(lock->get_parent());
+
+ /*
+ if (!lock->get_parent()->is_auth() &&
+ lock->fw_rdlock_to_auth()) {
+ mdcache->request_forward(mut, lock->get_parent()->authority().first);
+ return false;
+ }
+ */
+
+ while (1) {
+ // can read? grab ref.
+ if (lock->can_rdlock(client)) {
+ lock->get_rdlock();
+ mut->rdlocks.insert(lock);
+ mut->locks.insert(lock);
+ return true;
+ }
+
+ // hmm, wait a second.
+ if (in && !in->is_head() && in->is_auth() &&
+ lock->get_state() == LOCK_SNAP_SYNC) {
+ // okay, we actually need to kick the head's lock to get ourselves synced up.
+ CInode *head = mdcache->get_inode(in->ino());
+ assert(head);
+ SimpleLock *hlock = head->get_lock(CEPH_LOCK_IFILE);
+ if (hlock->get_state() == LOCK_SYNC)
+ hlock = head->get_lock(lock->get_type());
+
+ if (hlock->get_state() != LOCK_SYNC) {
+ dout(10) << "rdlock_start trying head inode " << *head << dendl;
+ if (!rdlock_start(hlock, mut, true)) // ** as_anon, no rdlock on EXCL **
+ return false;
+ // oh, check our lock again then
+ }
+ }
+
+ if (!_rdlock_kick(lock, as_anon))
+ break;
+ }
+
+ // wait!
+ int wait_on;
+ if (lock->get_parent()->is_auth() && lock->is_stable())
+ wait_on = SimpleLock::WAIT_RD;
+ else
+ wait_on = SimpleLock::WAIT_STABLE; // REQRDLOCK is ignored if lock is unstable, so we need to retry.
+ dout(7) << "rdlock_start waiting on " << *lock << " on " << *lock->get_parent() << dendl;
+ lock->add_waiter(wait_on, new C_MDS_RetryRequest(mdcache, mut));
+ nudge_log(lock);
+ return false;
+}
+
+void Locker::nudge_log(SimpleLock *lock)
+{
+ dout(10) << "nudge_log " << *lock << " on " << *lock->get_parent() << dendl;
+ if (lock->get_parent()->is_auth() && lock->is_unstable_and_locked()) // as with xlockdone, or cap flush
+ mds->mdlog->flush();
+}
+
+void Locker::rdlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue)
+{
+ // drop ref
+ lock->put_rdlock();
+ if (mut) {
+ mut->rdlocks.erase(lock);
+ mut->locks.erase(lock);
+ }
+
+ dout(7) << "rdlock_finish on " << *lock << " on " << *lock->get_parent() << dendl;
+
+ // last one?
+ if (!lock->is_rdlocked()) {
+ if (!lock->is_stable())
+ eval_gather(lock, false, pneed_issue);
+ else if (lock->get_parent()->is_auth())
+ try_eval(lock, pneed_issue);
+ }
+}
+
+
+bool Locker::can_rdlock_set(set<SimpleLock*>& locks)
+{
+ dout(10) << "can_rdlock_set " << locks << dendl;
+ for (set<SimpleLock*>::iterator p = locks.begin(); p != locks.end(); ++p)
+ if (!(*p)->can_rdlock(-1)) {
+ dout(10) << "can_rdlock_set can't rdlock " << *p << " on " << *(*p)->get_parent() << dendl;
+ return false;
+ }
+ return true;
+}
+
+bool Locker::rdlock_try_set(set<SimpleLock*>& locks)
+{
+ dout(10) << "rdlock_try_set " << locks << dendl;
+ for (set<SimpleLock*>::iterator p = locks.begin(); p != locks.end(); ++p)
+ if (!rdlock_try(*p, -1, NULL)) {
+ dout(10) << "rdlock_try_set can't rdlock " << *p << " on " << *(*p)->get_parent() << dendl;
+ return false;
+ }
+ return true;
+}
+
+void Locker::rdlock_take_set(set<SimpleLock*>& locks, MutationRef& mut)
+{
+ dout(10) << "rdlock_take_set " << locks << dendl;
+ for (set<SimpleLock*>::iterator p = locks.begin(); p != locks.end(); ++p) {
+ (*p)->get_rdlock();
+ mut->rdlocks.insert(*p);
+ mut->locks.insert(*p);
+ }
+}
+
+// ------------------
+// wrlock
+
+void Locker::wrlock_force(SimpleLock *lock, MutationRef& mut)
+{
+ if (lock->get_type() == CEPH_LOCK_IVERSION ||
+ lock->get_type() == CEPH_LOCK_DVERSION)
+ return local_wrlock_grab(static_cast<LocalLock*>(lock), mut);
+
+ dout(7) << "wrlock_force on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ lock->get_wrlock(true);
+ mut->wrlocks.insert(lock);
+ mut->locks.insert(lock);
+}
+
+bool Locker::wrlock_start(SimpleLock *lock, MDRequestRef& mut, bool nowait)
+{
+ if (lock->get_type() == CEPH_LOCK_IVERSION ||
+ lock->get_type() == CEPH_LOCK_DVERSION)
+ return local_wrlock_start(static_cast<LocalLock*>(lock), mut);
+
+ dout(10) << "wrlock_start " << *lock << " on " << *lock->get_parent() << dendl;
+
+ CInode *in = static_cast<CInode *>(lock->get_parent());
+ client_t client = mut->get_client();
+ bool want_scatter = !nowait && lock->get_parent()->is_auth() &&
+ (in->has_subtree_or_exporting_dirfrag() ||
+ static_cast<ScatterLock*>(lock)->get_scatter_wanted());
+
+ while (1) {
+ // wrlock?
+ if (lock->can_wrlock(client) &&
+ (!want_scatter || lock->get_state() == LOCK_MIX)) {
+ lock->get_wrlock();
+ mut->wrlocks.insert(lock);
+ mut->locks.insert(lock);
+ return true;
+ }
+
+ if (lock->get_type() == CEPH_LOCK_IFILE &&
+ in->state_test(CInode::STATE_RECOVERING)) {
+ mds->mdcache->recovery_queue.prioritize(in);
+ }
+
+ if (!lock->is_stable())
+ break;
+
+ if (in->is_auth()) {
+ // don't do nested lock state change if we have dirty scatterdata and
+ // may scatter_writebehind or start_scatter, because nowait==true implies
+ // that the caller already has a log entry open!
+ if (nowait && lock->is_dirty())
+ return false;
+
+ if (want_scatter)
+ scatter_mix(static_cast<ScatterLock*>(lock));
+ else
+ simple_lock(lock);
+
+ if (nowait && !lock->can_wrlock(client))
+ return false;
+
+ } else {
+ // replica.
+ // auth should be auth_pinned (see acquire_locks wrlock weird mustpin case).
+ mds_rank_t auth = lock->get_parent()->authority().first;
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) {
+ dout(10) << "requesting scatter from auth on "
+ << *lock << " on " << *lock->get_parent() << dendl;
+ mds->send_message_mds(new MLock(lock, LOCK_AC_REQSCATTER, mds->get_nodeid()), auth);
+ }
+ break;
+ }
+ }
+
+ if (!nowait) {
+ dout(7) << "wrlock_start waiting on " << *lock << " on " << *lock->get_parent() << dendl;
+ lock->add_waiter(SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut));
+ nudge_log(lock);
+ }
+
+ return false;
+}
+
+void Locker::wrlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue)
+{
+ if (lock->get_type() == CEPH_LOCK_IVERSION ||
+ lock->get_type() == CEPH_LOCK_DVERSION)
+ return local_wrlock_finish(static_cast<LocalLock*>(lock), mut);
+
+ dout(7) << "wrlock_finish on " << *lock << " on " << *lock->get_parent() << dendl;
+ lock->put_wrlock();
+ if (mut) {
+ mut->wrlocks.erase(lock);
+ if (mut->remote_wrlocks.count(lock) == 0)
+ mut->locks.erase(lock);
+ }
+
+ if (!lock->is_wrlocked()) {
+ if (!lock->is_stable())
+ eval_gather(lock, false, pneed_issue);
+ else if (lock->get_parent()->is_auth())
+ try_eval(lock, pneed_issue);
+ }
+}
+
+
+// remote wrlock
+
+void Locker::remote_wrlock_start(SimpleLock *lock, mds_rank_t target, MDRequestRef& mut)
+{
+ dout(7) << "remote_wrlock_start mds." << target << " on " << *lock << " on " << *lock->get_parent() << dendl;
+
+ // wait for active target
+ if (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(target)) {
+ dout(7) << " mds." << target << " is not active" << dendl;
+ if (mut->more()->waiting_on_slave.empty())
+ mds->wait_for_active_peer(target, new C_MDS_RetryRequest(mdcache, mut));
+ return;
+ }
+
+ // send lock request
+ mut->start_locking(lock, target);
+ mut->more()->slaves.insert(target);
+ MMDSSlaveRequest *r = new MMDSSlaveRequest(mut->reqid, mut->attempt,
+ MMDSSlaveRequest::OP_WRLOCK);
+ r->set_lock_type(lock->get_type());
+ lock->get_parent()->set_object_info(r->get_object_info());
+ mds->send_message_mds(r, target);
+
+ assert(mut->more()->waiting_on_slave.count(target) == 0);
+ mut->more()->waiting_on_slave.insert(target);
+}
+
+void Locker::remote_wrlock_finish(SimpleLock *lock, mds_rank_t target,
+ MutationImpl *mut)
+{
+ // drop ref
+ mut->remote_wrlocks.erase(lock);
+ if (mut->wrlocks.count(lock) == 0)
+ mut->locks.erase(lock);
+
+ dout(7) << "remote_wrlock_finish releasing remote wrlock on mds." << target
+ << " " << *lock->get_parent() << dendl;
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->get_state(target) >= MDSMap::STATE_REJOIN) {
+ MMDSSlaveRequest *slavereq = new MMDSSlaveRequest(mut->reqid, mut->attempt,
+ MMDSSlaveRequest::OP_UNWRLOCK);
+ slavereq->set_lock_type(lock->get_type());
+ lock->get_parent()->set_object_info(slavereq->get_object_info());
+ mds->send_message_mds(slavereq, target);
+ }
+}
+
+
+// ------------------
+// xlock
+
+bool Locker::xlock_start(SimpleLock *lock, MDRequestRef& mut)
+{
+ if (lock->get_type() == CEPH_LOCK_IVERSION ||
+ lock->get_type() == CEPH_LOCK_DVERSION)
+ return local_xlock_start(static_cast<LocalLock*>(lock), mut);
+
+ dout(7) << "xlock_start on " << *lock << " on " << *lock->get_parent() << dendl;
+ client_t client = mut->get_client();
+
+ // auth?
+ if (lock->get_parent()->is_auth()) {
+ // auth
+ while (1) {
+ if (lock->can_xlock(client)) {
+ lock->set_state(LOCK_XLOCK);
+ lock->get_xlock(mut, client);
+ mut->xlocks.insert(lock);
+ mut->locks.insert(lock);
+ mut->finish_locking(lock);
+ return true;
+ }
+
+ if (lock->get_type() == CEPH_LOCK_IFILE) {
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ if (in->state_test(CInode::STATE_RECOVERING)) {
+ mds->mdcache->recovery_queue.prioritize(in);
+ }
+ }
+
+ if (!lock->is_stable() && (lock->get_state() != LOCK_XLOCKDONE ||
+ lock->get_xlock_by_client() != client ||
+ lock->is_waiter_for(SimpleLock::WAIT_STABLE)))
+ break;
+
+ if (lock->get_state() == LOCK_LOCK || lock->get_state() == LOCK_XLOCKDONE) {
+ mut->start_locking(lock);
+ simple_xlock(lock);
+ } else {
+ simple_lock(lock);
+ }
+ }
+
+ lock->add_waiter(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut));
+ nudge_log(lock);
+ return false;
+ } else {
+ // replica
+ assert(lock->get_sm()->can_remote_xlock);
+ assert(!mut->slave_request);
+
+ // wait for single auth
+ if (lock->get_parent()->is_ambiguous_auth()) {
+ lock->get_parent()->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH,
+ new C_MDS_RetryRequest(mdcache, mut));
+ return false;
+ }
+
+ // wait for active auth
+ mds_rank_t auth = lock->get_parent()->authority().first;
+ if (mds->is_cluster_degraded() &&
+ !mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) {
+ dout(7) << " mds." << auth << " is not active" << dendl;
+ if (mut->more()->waiting_on_slave.empty())
+ mds->wait_for_active_peer(auth, new C_MDS_RetryRequest(mdcache, mut));
+ return false;
+ }
+
+ // send lock request
+ mut->more()->slaves.insert(auth);
+ mut->start_locking(lock, auth);
+ MMDSSlaveRequest *r = new MMDSSlaveRequest(mut->reqid, mut->attempt,
+ MMDSSlaveRequest::OP_XLOCK);
+ r->set_lock_type(lock->get_type());
+ lock->get_parent()->set_object_info(r->get_object_info());
+ mds->send_message_mds(r, auth);
+
+ assert(mut->more()->waiting_on_slave.count(auth) == 0);
+ mut->more()->waiting_on_slave.insert(auth);
+
+ return false;
+ }
+}
+
+void Locker::_finish_xlock(SimpleLock *lock, client_t xlocker, bool *pneed_issue)
+{
+ assert(!lock->is_stable());
+ if (lock->get_num_rdlocks() == 0 &&
+ lock->get_num_wrlocks() == 0 &&
+ lock->get_num_client_lease() == 0 &&
+ lock->get_state() != LOCK_XLOCKSNAP &&
+ lock->get_type() != CEPH_LOCK_DN) {
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ client_t loner = in->get_target_loner();
+ if (loner >= 0 && (xlocker < 0 || xlocker == loner)) {
+ lock->set_state(LOCK_EXCL);
+ lock->get_parent()->auth_unpin(lock);
+ lock->finish_waiters(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_WR|SimpleLock::WAIT_RD);
+ if (lock->get_cap_shift())
+ *pneed_issue = true;
+ if (lock->get_parent()->is_auth() &&
+ lock->is_stable())
+ try_eval(lock, pneed_issue);
+ return;
+ }
+ }
+ // the xlocker may have CEPH_CAP_GSHARED, need to revoke it if next state is LOCK_LOCK
+ eval_gather(lock, lock->get_state() != LOCK_XLOCKSNAP, pneed_issue);
+}
+
+void Locker::xlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue)
+{
+ if (lock->get_type() == CEPH_LOCK_IVERSION ||
+ lock->get_type() == CEPH_LOCK_DVERSION)
+ return local_xlock_finish(static_cast<LocalLock*>(lock), mut);
+
+ dout(10) << "xlock_finish on " << *lock << " " << *lock->get_parent() << dendl;
+
+ client_t xlocker = lock->get_xlock_by_client();
+
+ // drop ref
+ lock->put_xlock();
+ assert(mut);
+ mut->xlocks.erase(lock);
+ mut->locks.erase(lock);
+
+ bool do_issue = false;
+
+ // remote xlock?
+ if (!lock->get_parent()->is_auth()) {
+ assert(lock->get_sm()->can_remote_xlock);
+
+ // tell auth
+ dout(7) << "xlock_finish releasing remote xlock on " << *lock->get_parent() << dendl;
+ mds_rank_t auth = lock->get_parent()->authority().first;
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->get_state(auth) >= MDSMap::STATE_REJOIN) {
+ MMDSSlaveRequest *slavereq = new MMDSSlaveRequest(mut->reqid, mut->attempt,
+ MMDSSlaveRequest::OP_UNXLOCK);
+ slavereq->set_lock_type(lock->get_type());
+ lock->get_parent()->set_object_info(slavereq->get_object_info());
+ mds->send_message_mds(slavereq, auth);
+ }
+ // others waiting?
+ lock->finish_waiters(SimpleLock::WAIT_STABLE |
+ SimpleLock::WAIT_WR |
+ SimpleLock::WAIT_RD, 0);
+ } else {
+ if (lock->get_num_xlocks() == 0) {
+ if (lock->get_state() == LOCK_LOCK_XLOCK)
+ lock->set_state(LOCK_XLOCKDONE);
+ _finish_xlock(lock, xlocker, &do_issue);
+ }
+ }
+
+ if (do_issue) {
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ if (in->is_head()) {
+ if (pneed_issue)
+ *pneed_issue = true;
+ else
+ issue_caps(in);
+ }
+ }
+}
+
+void Locker::xlock_export(SimpleLock *lock, MutationImpl *mut)
+{
+ dout(10) << "xlock_export on " << *lock << " " << *lock->get_parent() << dendl;
+
+ lock->put_xlock();
+ mut->xlocks.erase(lock);
+ mut->locks.erase(lock);
+
+ MDSCacheObject *p = lock->get_parent();
+ assert(p->state_test(CInode::STATE_AMBIGUOUSAUTH)); // we are exporting this (inode)
+
+ if (!lock->is_stable())
+ lock->get_parent()->auth_unpin(lock);
+
+ lock->set_state(LOCK_LOCK);
+}
+
+void Locker::xlock_import(SimpleLock *lock)
+{
+ dout(10) << "xlock_import on " << *lock << " " << *lock->get_parent() << dendl;
+ lock->get_parent()->auth_pin(lock);
+}
+
+
+
+// file i/o -----------------------------------------
+
+version_t Locker::issue_file_data_version(CInode *in)
+{
+ dout(7) << "issue_file_data_version on " << *in << dendl;
+ return in->inode.file_data_version;
+}
+
+class C_Locker_FileUpdate_finish : public LockerLogContext {
+ CInode *in;
+ MutationRef mut;
+ bool share_max;
+ bool need_issue;
+ client_t client;
+ MClientCaps *ack;
+public:
+ C_Locker_FileUpdate_finish(Locker *l, CInode *i, MutationRef& m,
+ bool sm=false, bool ni=false, client_t c=-1,
+ MClientCaps *ac = 0)
+ : LockerLogContext(l), in(i), mut(m), share_max(sm), need_issue(ni),
+ client(c), ack(ac) {
+ in->get(CInode::PIN_PTRWAITER);
+ }
+ void finish(int r) override {
+ locker->file_update_finish(in, mut, share_max, need_issue, client, ack);
+ in->put(CInode::PIN_PTRWAITER);
+ }
+};
+
+void Locker::file_update_finish(CInode *in, MutationRef& mut, bool share_max, bool issue_client_cap,
+ client_t client, MClientCaps *ack)
+{
+ dout(10) << "file_update_finish on " << *in << dendl;
+ in->pop_and_dirty_projected_inode(mut->ls);
+
+ mut->apply();
+
+ if (ack) {
+ Session *session = mds->get_session(client);
+ if (session) {
+ // "oldest flush tid" > 0 means client uses unique TID for each flush
+ if (ack->get_oldest_flush_tid() > 0)
+ session->add_completed_flush(ack->get_client_tid());
+ mds->send_message_client_counted(ack, session);
+ } else {
+ dout(10) << " no session for client." << client << " " << *ack << dendl;
+ ack->put();
+ }
+ }
+
+ set<CInode*> need_issue;
+ drop_locks(mut.get(), &need_issue);
+
+ if (!in->is_head() && !in->client_snap_caps.empty()) {
+ dout(10) << " client_snap_caps " << in->client_snap_caps << dendl;
+ // check for snap writeback completion
+ bool gather = false;
+ compact_map<int,set<client_t> >::iterator p = in->client_snap_caps.begin();
+ while (p != in->client_snap_caps.end()) {
+ SimpleLock *lock = in->get_lock(p->first);
+ assert(lock);
+ dout(10) << " completing client_snap_caps for " << ccap_string(p->first)
+ << " lock " << *lock << " on " << *in << dendl;
+ lock->put_wrlock();
+
+ p->second.erase(client);
+ if (p->second.empty()) {
+ gather = true;
+ in->client_snap_caps.erase(p++);
+ } else
+ ++p;
+ }
+ if (gather) {
+ if (in->client_snap_caps.empty())
+ in->item_open_file.remove_myself();
+ eval_cap_gather(in, &need_issue);
+ }
+ } else {
+ if (issue_client_cap && need_issue.count(in) == 0) {
+ Capability *cap = in->get_client_cap(client);
+ if (cap && (cap->wanted() & ~cap->pending()))
+ issue_caps(in, cap);
+ }
+
+ if (share_max && in->is_auth() &&
+ (in->filelock.gcaps_allowed(CAP_LONER) & (CEPH_CAP_GWR|CEPH_CAP_GBUFFER)))
+ share_inode_max_size(in);
+ }
+ issue_caps_set(need_issue);
+
+ // auth unpin after issuing caps
+ mut->cleanup();
+}
+
+Capability* Locker::issue_new_caps(CInode *in,
+ int mode,
+ Session *session,
+ SnapRealm *realm,
+ bool is_replay)
+{
+ dout(7) << "issue_new_caps for mode " << mode << " on " << *in << dendl;
+ bool is_new;
+
+ // if replay, try to reconnect cap, and otherwise do nothing.
+ if (is_replay) {
+ mds->mdcache->try_reconnect_cap(in, session);
+ return 0;
+ }
+
+ // my needs
+ assert(session->info.inst.name.is_client());
+ client_t my_client = session->info.inst.name.num();
+ int my_want = ceph_caps_for_mode(mode);
+
+ // register a capability
+ Capability *cap = in->get_client_cap(my_client);
+ if (!cap) {
+ // new cap
+ cap = in->add_client_cap(my_client, session, realm);
+ cap->set_wanted(my_want);
+ cap->mark_new();
+ cap->inc_suppress(); // suppress file cap messages for new cap (we'll bundle with the open() reply)
+ is_new = true;
+ } else {
+ is_new = false;
+ // make sure it wants sufficient caps
+ if (my_want & ~cap->wanted()) {
+ // augment wanted caps for this client
+ cap->set_wanted(cap->wanted() | my_want);
+ }
+ }
+
+ if (in->is_auth()) {
+ // [auth] twiddle mode?
+ eval(in, CEPH_CAP_LOCKS);
+
+ if (_need_flush_mdlog(in, my_want))
+ mds->mdlog->flush();
+
+ } else {
+ // [replica] tell auth about any new caps wanted
+ request_inode_file_caps(in);
+ }
+
+ // issue caps (pot. incl new one)
+ //issue_caps(in); // note: _eval above may have done this already...
+
+ // re-issue whatever we can
+ //cap->issue(cap->pending());
+
+ if (is_new)
+ cap->dec_suppress();
+
+ return cap;
+}
+
+
+void Locker::issue_caps_set(set<CInode*>& inset)
+{
+ for (set<CInode*>::iterator p = inset.begin(); p != inset.end(); ++p)
+ issue_caps(*p);
+}
+
+bool Locker::issue_caps(CInode *in, Capability *only_cap)
+{
+ // allowed caps are determined by the lock mode.
+ int all_allowed = in->get_caps_allowed_by_type(CAP_ANY);
+ int loner_allowed = in->get_caps_allowed_by_type(CAP_LONER);
+ int xlocker_allowed = in->get_caps_allowed_by_type(CAP_XLOCKER);
+
+ client_t loner = in->get_loner();
+ if (loner >= 0) {
+ dout(7) << "issue_caps loner client." << loner
+ << " allowed=" << ccap_string(loner_allowed)
+ << ", xlocker allowed=" << ccap_string(xlocker_allowed)
+ << ", others allowed=" << ccap_string(all_allowed)
+ << " on " << *in << dendl;
+ } else {
+ dout(7) << "issue_caps allowed=" << ccap_string(all_allowed)
+ << ", xlocker allowed=" << ccap_string(xlocker_allowed)
+ << " on " << *in << dendl;
+ }
+
+ assert(in->is_head());
+
+ // count conflicts with
+ int nissued = 0;
+
+ // client caps
+ map<client_t, Capability*>::iterator it;
+ if (only_cap)
+ it = in->client_caps.find(only_cap->get_client());
+ else
+ it = in->client_caps.begin();
+ for (; it != in->client_caps.end(); ++it) {
+ Capability *cap = it->second;
+ if (cap->is_stale())
+ continue;
+
+ // do not issue _new_ bits when size|mtime is projected
+ int allowed;
+ if (loner == it->first)
+ allowed = loner_allowed;
+ else
+ allowed = all_allowed;
+
+ // add in any xlocker-only caps (for locks this client is the xlocker for)
+ allowed |= xlocker_allowed & in->get_xlocker_mask(it->first);
+
+ Session *session = mds->get_session(it->first);
+ if (in->inode.inline_data.version != CEPH_INLINE_NONE &&
+ !(session && session->connection &&
+ session->connection->has_feature(CEPH_FEATURE_MDS_INLINE_DATA)))
+ allowed &= ~(CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR);
+
+ int pending = cap->pending();
+ int wanted = cap->wanted();
+
+ dout(20) << " client." << it->first
+ << " pending " << ccap_string(pending)
+ << " allowed " << ccap_string(allowed)
+ << " wanted " << ccap_string(wanted)
+ << dendl;
+
+ if (!(pending & ~allowed)) {
+ // skip if suppress or new, and not revocation
+ if (cap->is_new() || cap->is_suppress()) {
+ dout(20) << " !revoke and new|suppressed, skipping client." << it->first << dendl;
+ continue;
+ }
+ }
+
+ // notify clients about deleted inode, to make sure they release caps ASAP.
+ if (in->inode.nlink == 0)
+ wanted |= CEPH_CAP_LINK_SHARED;
+
+ // are there caps that the client _wants_ and can have, but aren't pending?
+ // or do we need to revoke?
+ if (((wanted & allowed) & ~pending) || // missing wanted+allowed caps
+ (pending & ~allowed)) { // need to revoke ~allowed caps.
+ // issue
+ nissued++;
+
+ // include caps that clients generally like, while we're at it.
+ int likes = in->get_caps_liked();
+ int before = pending;
+ long seq;
+ if (pending & ~allowed)
+ seq = cap->issue((wanted|likes) & allowed & pending); // if revoking, don't issue anything new.
+ else
+ seq = cap->issue((wanted|likes) & allowed);
+ int after = cap->pending();
+
+ if (cap->is_new()) {
+ // haven't send caps to client yet
+ if (before & ~after)
+ cap->confirm_receipt(seq, after);
+ } else {
+ dout(7) << " sending MClientCaps to client." << it->first
+ << " seq " << cap->get_last_seq()
+ << " new pending " << ccap_string(after) << " was " << ccap_string(before)
+ << dendl;
+
+ int op = (before & ~after) ? CEPH_CAP_OP_REVOKE : CEPH_CAP_OP_GRANT;
+ if (op == CEPH_CAP_OP_REVOKE) {
+ revoking_caps.push_back(&cap->item_revoking_caps);
+ revoking_caps_by_client[cap->get_client()].push_back(&cap->item_client_revoking_caps);
+ cap->set_last_revoke_stamp(ceph_clock_now());
+ cap->reset_num_revoke_warnings();
+ }
+
+ MClientCaps *m = new MClientCaps(op, in->ino(),
+ in->find_snaprealm()->inode->ino(),
+ cap->get_cap_id(), cap->get_last_seq(),
+ after, wanted, 0,
+ cap->get_mseq(),
+ mds->get_osd_epoch_barrier());
+ in->encode_cap_message(m, cap);
+
+ mds->send_message_client_counted(m, it->first);
+ }
+ }
+
+ if (only_cap)
+ break;
+ }
+
+ return (nissued == 0); // true if no re-issued, no callbacks
+}
+
+void Locker::issue_truncate(CInode *in)
+{
+ dout(7) << "issue_truncate on " << *in << dendl;
+
+ for (map<client_t, Capability*>::iterator it = in->client_caps.begin();
+ it != in->client_caps.end();
+ ++it) {
+ Capability *cap = it->second;
+ MClientCaps *m = new MClientCaps(CEPH_CAP_OP_TRUNC,
+ in->ino(),
+ in->find_snaprealm()->inode->ino(),
+ cap->get_cap_id(), cap->get_last_seq(),
+ cap->pending(), cap->wanted(), 0,
+ cap->get_mseq(),
+ mds->get_osd_epoch_barrier());
+ in->encode_cap_message(m, cap);
+ mds->send_message_client_counted(m, it->first);
+ }
+
+ // should we increase max_size?
+ if (in->is_auth() && in->is_file())
+ check_inode_max_size(in);
+}
+
+
+void Locker::revoke_stale_caps(Capability *cap)
+{
+ CInode *in = cap->get_inode();
+ if (in->state_test(CInode::STATE_EXPORTINGCAPS)) {
+ // if export succeeds, the cap will be removed. if export fails, we need to
+ // revoke the cap if it's still stale.
+ in->state_set(CInode::STATE_EVALSTALECAPS);
+ return;
+ }
+
+ int issued = cap->issued();
+ if (issued & ~CEPH_CAP_PIN) {
+ dout(10) << " revoking " << ccap_string(issued) << " on " << *in << dendl;
+ cap->revoke();
+
+ if (in->is_auth() &&
+ in->inode.client_ranges.count(cap->get_client()))
+ in->state_set(CInode::STATE_NEEDSRECOVER);
+
+ if (!in->filelock.is_stable()) eval_gather(&in->filelock);
+ if (!in->linklock.is_stable()) eval_gather(&in->linklock);
+ if (!in->authlock.is_stable()) eval_gather(&in->authlock);
+ if (!in->xattrlock.is_stable()) eval_gather(&in->xattrlock);
+
+ if (in->is_auth()) {
+ try_eval(in, CEPH_CAP_LOCKS);
+ } else {
+ request_inode_file_caps(in);
+ }
+ }
+}
+
+void Locker::revoke_stale_caps(Session *session)
+{
+ dout(10) << "revoke_stale_caps for " << session->info.inst.name << dendl;
+
+ for (xlist<Capability*>::iterator p = session->caps.begin(); !p.end(); ++p) {
+ Capability *cap = *p;
+ cap->mark_stale();
+ revoke_stale_caps(cap);
+ }
+}
+
+void Locker::resume_stale_caps(Session *session)
+{
+ dout(10) << "resume_stale_caps for " << session->info.inst.name << dendl;
+
+ for (xlist<Capability*>::iterator p = session->caps.begin(); !p.end(); ++p) {
+ Capability *cap = *p;
+ CInode *in = cap->get_inode();
+ assert(in->is_head());
+ if (cap->is_stale()) {
+ dout(10) << " clearing stale flag on " << *in << dendl;
+ cap->clear_stale();
+
+ if (in->state_test(CInode::STATE_EXPORTINGCAPS)) {
+ // if export succeeds, the cap will be removed. if export fails,
+ // we need to re-issue the cap if it's not stale.
+ in->state_set(CInode::STATE_EVALSTALECAPS);
+ continue;
+ }
+
+ if (!in->is_auth() || !eval(in, CEPH_CAP_LOCKS))
+ issue_caps(in, cap);
+ }
+ }
+}
+
+void Locker::remove_stale_leases(Session *session)
+{
+ dout(10) << "remove_stale_leases for " << session->info.inst.name << dendl;
+ xlist<ClientLease*>::iterator p = session->leases.begin();
+ while (!p.end()) {
+ ClientLease *l = *p;
+ ++p;
+ CDentry *parent = static_cast<CDentry*>(l->parent);
+ dout(15) << " removing lease on " << *parent << dendl;
+ parent->remove_client_lease(l, this);
+ }
+}
+
+
+class C_MDL_RequestInodeFileCaps : public LockerContext {
+ CInode *in;
+public:
+ C_MDL_RequestInodeFileCaps(Locker *l, CInode *i) : LockerContext(l), in(i) {
+ in->get(CInode::PIN_PTRWAITER);
+ }
+ void finish(int r) override {
+ if (!in->is_auth())
+ locker->request_inode_file_caps(in);
+ in->put(CInode::PIN_PTRWAITER);
+ }
+};
+
+void Locker::request_inode_file_caps(CInode *in)
+{
+ assert(!in->is_auth());
+
+ int wanted = in->get_caps_wanted() & ~CEPH_CAP_PIN;
+ if (wanted != in->replica_caps_wanted) {
+ // wait for single auth
+ if (in->is_ambiguous_auth()) {
+ in->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH,
+ new C_MDL_RequestInodeFileCaps(this, in));
+ return;
+ }
+
+ mds_rank_t auth = in->authority().first;
+ if (mds->is_cluster_degraded() &&
+ mds->mdsmap->get_state(auth) == MDSMap::STATE_REJOIN) {
+ mds->wait_for_active_peer(auth, new C_MDL_RequestInodeFileCaps(this, in));
+ return;
+ }
+
+ dout(7) << "request_inode_file_caps " << ccap_string(wanted)
+ << " was " << ccap_string(in->replica_caps_wanted)
+ << " on " << *in << " to mds." << auth << dendl;
+
+ in->replica_caps_wanted = wanted;
+
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->is_clientreplay_or_active_or_stopping(auth))
+ mds->send_message_mds(new MInodeFileCaps(in->ino(), in->replica_caps_wanted),
+ auth);
+ }
+}
+
+/* This function DOES put the passed message before returning */
+void Locker::handle_inode_file_caps(MInodeFileCaps *m)
+{
+ // nobody should be talking to us during recovery.
+ assert(mds->is_clientreplay() || mds->is_active() || mds->is_stopping());
+
+ // ok
+ CInode *in = mdcache->get_inode(m->get_ino());
+ mds_rank_t from = mds_rank_t(m->get_source().num());
+
+ assert(in);
+ assert(in->is_auth());
+
+ dout(7) << "handle_inode_file_caps replica mds." << from << " wants caps " << ccap_string(m->get_caps()) << " on " << *in << dendl;
+
+ if (m->get_caps())
+ in->mds_caps_wanted[from] = m->get_caps();
+ else
+ in->mds_caps_wanted.erase(from);
+
+ try_eval(in, CEPH_CAP_LOCKS);
+ m->put();
+}
+
+
+class C_MDL_CheckMaxSize : public LockerContext {
+ CInode *in;
+ uint64_t new_max_size;
+ uint64_t newsize;
+ utime_t mtime;
+
+public:
+ C_MDL_CheckMaxSize(Locker *l, CInode *i, uint64_t _new_max_size,
+ uint64_t _newsize, utime_t _mtime) :
+ LockerContext(l), in(i),
+ new_max_size(_new_max_size), newsize(_newsize), mtime(_mtime)
+ {
+ in->get(CInode::PIN_PTRWAITER);
+ }
+ void finish(int r) override {
+ if (in->is_auth())
+ locker->check_inode_max_size(in, false, new_max_size, newsize, mtime);
+ in->put(CInode::PIN_PTRWAITER);
+ }
+};
+
+uint64_t Locker::calc_new_max_size(inode_t *pi, uint64_t size)
+{
+ uint64_t new_max = (size + 1) << 1;
+ uint64_t max_inc = g_conf->mds_client_writeable_range_max_inc_objs;
+ if (max_inc > 0) {
+ max_inc *= pi->get_layout_size_increment();
+ new_max = MIN(new_max, size + max_inc);
+ }
+ return ROUND_UP_TO(new_max, pi->get_layout_size_increment());
+}
+
+void Locker::calc_new_client_ranges(CInode *in, uint64_t size,
+ map<client_t,client_writeable_range_t> *new_ranges,
+ bool *max_increased)
+{
+ inode_t *latest = in->get_projected_inode();
+ uint64_t ms;
+ if(latest->has_layout()) {
+ ms = calc_new_max_size(latest, size);
+ } else {
+ // Layout-less directories like ~mds0/, have zero size
+ ms = 0;
+ }
+
+ // increase ranges as appropriate.
+ // shrink to 0 if no WR|BUFFER caps issued.
+ for (map<client_t,Capability*>::iterator p = in->client_caps.begin();
+ p != in->client_caps.end();
+ ++p) {
+ if ((p->second->issued() | p->second->wanted()) & (CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER)) {
+ client_writeable_range_t& nr = (*new_ranges)[p->first];
+ nr.range.first = 0;
+ if (latest->client_ranges.count(p->first)) {
+ client_writeable_range_t& oldr = latest->client_ranges[p->first];
+ if (ms > oldr.range.last)
+ *max_increased = true;
+ nr.range.last = MAX(ms, oldr.range.last);
+ nr.follows = oldr.follows;
+ } else {
+ *max_increased = true;
+ nr.range.last = ms;
+ nr.follows = in->first - 1;
+ }
+ }
+ }
+}
+
+bool Locker::check_inode_max_size(CInode *in, bool force_wrlock,
+ uint64_t new_max_size, uint64_t new_size,
+ utime_t new_mtime)
+{
+ assert(in->is_auth());
+ assert(in->is_file());
+
+ inode_t *latest = in->get_projected_inode();
+ map<client_t, client_writeable_range_t> new_ranges;
+ uint64_t size = latest->size;
+ bool update_size = new_size > 0;
+ bool update_max = false;
+ bool max_increased = false;
+
+ if (update_size) {
+ new_size = size = MAX(size, new_size);
+ new_mtime = MAX(new_mtime, latest->mtime);
+ if (latest->size == new_size && latest->mtime == new_mtime)
+ update_size = false;
+ }
+
+ calc_new_client_ranges(in, max(new_max_size, size), &new_ranges, &max_increased);
+
+ if (max_increased || latest->client_ranges != new_ranges)
+ update_max = true;
+
+ if (!update_size && !update_max) {
+ dout(20) << "check_inode_max_size no-op on " << *in << dendl;
+ return false;
+ }
+
+ dout(10) << "check_inode_max_size new_ranges " << new_ranges
+ << " update_size " << update_size
+ << " on " << *in << dendl;
+
+ if (in->is_frozen()) {
+ dout(10) << "check_inode_max_size frozen, waiting on " << *in << dendl;
+ C_MDL_CheckMaxSize *cms = new C_MDL_CheckMaxSize(this, in,
+ new_max_size,
+ new_size,
+ new_mtime);
+ in->add_waiter(CInode::WAIT_UNFREEZE, cms);
+ return false;
+ }
+ if (!force_wrlock && !in->filelock.can_wrlock(in->get_loner())) {
+ // lock?
+ if (in->filelock.is_stable()) {
+ if (in->get_target_loner() >= 0)
+ file_excl(&in->filelock);
+ else
+ simple_lock(&in->filelock);
+ }
+ if (!in->filelock.can_wrlock(in->get_loner())) {
+ // try again later
+ C_MDL_CheckMaxSize *cms = new C_MDL_CheckMaxSize(this, in,
+ new_max_size,
+ new_size,
+ new_mtime);
+
+ in->filelock.add_waiter(SimpleLock::WAIT_STABLE, cms);
+ dout(10) << "check_inode_max_size can't wrlock, waiting on " << *in << dendl;
+ return false;
+ }
+ }
+
+ MutationRef mut(new MutationImpl());
+ mut->ls = mds->mdlog->get_current_segment();
+
+ inode_t *pi = in->project_inode();
+ pi->version = in->pre_dirty();
+
+ if (update_max) {
+ dout(10) << "check_inode_max_size client_ranges " << pi->client_ranges << " -> " << new_ranges << dendl;
+ pi->client_ranges = new_ranges;
+ }
+
+ if (update_size) {
+ dout(10) << "check_inode_max_size size " << pi->size << " -> " << new_size << dendl;
+ pi->size = new_size;
+ pi->rstat.rbytes = new_size;
+ dout(10) << "check_inode_max_size mtime " << pi->mtime << " -> " << new_mtime << dendl;
+ pi->mtime = new_mtime;
+ }
+
+ // use EOpen if the file is still open; otherwise, use EUpdate.
+ // this is just an optimization to push open files forward into
+ // newer log segments.
+ LogEvent *le;
+ EMetaBlob *metablob;
+ if (in->is_any_caps_wanted() && in->last == CEPH_NOSNAP) {
+ EOpen *eo = new EOpen(mds->mdlog);
+ eo->add_ino(in->ino());
+ metablob = &eo->metablob;
+ le = eo;
+ mut->ls->open_files.push_back(&in->item_open_file);
+ } else {
+ EUpdate *eu = new EUpdate(mds->mdlog, "check_inode_max_size");
+ metablob = &eu->metablob;
+ le = eu;
+ }
+ mds->mdlog->start_entry(le);
+ if (update_size) { // FIXME if/when we do max_size nested accounting
+ mdcache->predirty_journal_parents(mut, metablob, in, 0, PREDIRTY_PRIMARY);
+ // no cow, here!
+ CDentry *parent = in->get_projected_parent_dn();
+ metablob->add_primary_dentry(parent, in, true);
+ } else {
+ metablob->add_dir_context(in->get_projected_parent_dn()->get_dir());
+ mdcache->journal_dirty_inode(mut.get(), metablob, in);
+ }
+ mds->mdlog->submit_entry(le,
+ new C_Locker_FileUpdate_finish(this, in, mut, true));
+ wrlock_force(&in->filelock, mut); // wrlock for duration of journal
+ mut->auth_pin(in);
+
+ // make max_size _increase_ timely
+ if (max_increased)
+ mds->mdlog->flush();
+
+ return true;
+}
+
+
+void Locker::share_inode_max_size(CInode *in, Capability *only_cap)
+{
+ /*
+ * only share if currently issued a WR cap. if client doesn't have it,
+ * file_max doesn't matter, and the client will get it if/when they get
+ * the cap later.
+ */
+ dout(10) << "share_inode_max_size on " << *in << dendl;
+ map<client_t, Capability*>::iterator it;
+ if (only_cap)
+ it = in->client_caps.find(only_cap->get_client());
+ else
+ it = in->client_caps.begin();
+ for (; it != in->client_caps.end(); ++it) {
+ const client_t client = it->first;
+ Capability *cap = it->second;
+ if (cap->is_suppress())
+ continue;
+ if (cap->pending() & (CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER)) {
+ dout(10) << "share_inode_max_size with client." << client << dendl;
+ cap->inc_last_seq();
+ MClientCaps *m = new MClientCaps(CEPH_CAP_OP_GRANT,
+ in->ino(),
+ in->find_snaprealm()->inode->ino(),
+ cap->get_cap_id(), cap->get_last_seq(),
+ cap->pending(), cap->wanted(), 0,
+ cap->get_mseq(),
+ mds->get_osd_epoch_barrier());
+ in->encode_cap_message(m, cap);
+ mds->send_message_client_counted(m, client);
+ }
+ if (only_cap)
+ break;
+ }
+}
+
+bool Locker::_need_flush_mdlog(CInode *in, int wanted)
+{
+ /* flush log if caps are wanted by client but corresponding lock is unstable and locked by
+ * pending mutations. */
+ if (((wanted & (CEPH_CAP_FILE_RD|CEPH_CAP_FILE_WR|CEPH_CAP_FILE_SHARED|CEPH_CAP_FILE_EXCL)) &&
+ in->filelock.is_unstable_and_locked()) ||
+ ((wanted & (CEPH_CAP_AUTH_SHARED|CEPH_CAP_AUTH_EXCL)) &&
+ in->authlock.is_unstable_and_locked()) ||
+ ((wanted & (CEPH_CAP_LINK_SHARED|CEPH_CAP_LINK_EXCL)) &&
+ in->linklock.is_unstable_and_locked()) ||
+ ((wanted & (CEPH_CAP_XATTR_SHARED|CEPH_CAP_XATTR_EXCL)) &&
+ in->xattrlock.is_unstable_and_locked()))
+ return true;
+ return false;
+}
+
+void Locker::adjust_cap_wanted(Capability *cap, int wanted, int issue_seq)
+{
+ if (ceph_seq_cmp(issue_seq, cap->get_last_issue()) == 0) {
+ dout(10) << " wanted " << ccap_string(cap->wanted())
+ << " -> " << ccap_string(wanted) << dendl;
+ cap->set_wanted(wanted);
+ } else if (wanted & ~cap->wanted()) {
+ dout(10) << " wanted " << ccap_string(cap->wanted())
+ << " -> " << ccap_string(wanted)
+ << " (added caps even though we had seq mismatch!)" << dendl;
+ cap->set_wanted(wanted | cap->wanted());
+ } else {
+ dout(10) << " NOT changing wanted " << ccap_string(cap->wanted())
+ << " -> " << ccap_string(wanted)
+ << " (issue_seq " << issue_seq << " != last_issue "
+ << cap->get_last_issue() << ")" << dendl;
+ return;
+ }
+
+ CInode *cur = cap->get_inode();
+ if (!cur->is_auth()) {
+ request_inode_file_caps(cur);
+ return;
+ }
+
+ if (cap->wanted() == 0) {
+ if (cur->item_open_file.is_on_list() &&
+ !cur->is_any_caps_wanted()) {
+ dout(10) << " removing unwanted file from open file list " << *cur << dendl;
+ cur->item_open_file.remove_myself();
+ }
+ } else {
+ if (cur->state_test(CInode::STATE_RECOVERING) &&
+ (cap->wanted() & (CEPH_CAP_FILE_RD |
+ CEPH_CAP_FILE_WR))) {
+ mds->mdcache->recovery_queue.prioritize(cur);
+ }
+
+ if (!cur->item_open_file.is_on_list()) {
+ dout(10) << " adding to open file list " << *cur << dendl;
+ assert(cur->last == CEPH_NOSNAP);
+ LogSegment *ls = mds->mdlog->get_current_segment();
+ EOpen *le = new EOpen(mds->mdlog);
+ mds->mdlog->start_entry(le);
+ le->add_clean_inode(cur);
+ ls->open_files.push_back(&cur->item_open_file);
+ mds->mdlog->submit_entry(le);
+ }
+ }
+}
+
+
+
+void Locker::_do_null_snapflush(CInode *head_in, client_t client, snapid_t last)
+{
+ dout(10) << "_do_null_snapflush client." << client << " on " << *head_in << dendl;
+ for (auto p = head_in->client_need_snapflush.begin();
+ p != head_in->client_need_snapflush.end() && p->first < last; ) {
+ snapid_t snapid = p->first;
+ set<client_t>& clients = p->second;
+ ++p; // be careful, q loop below depends on this
+
+ if (clients.count(client)) {
+ dout(10) << " doing async NULL snapflush on " << snapid << " from client." << client << dendl;
+ CInode *sin = mdcache->get_inode(head_in->ino(), snapid);
+ if (!sin) {
+ // hrm, look forward until we find the inode.
+ // (we can only look it up by the last snapid it is valid for)
+ dout(10) << " didn't have " << head_in->ino() << " snapid " << snapid << dendl;
+ for (compact_map<snapid_t, set<client_t> >::iterator q = p; // p is already at next entry
+ q != head_in->client_need_snapflush.end();
+ ++q) {
+ dout(10) << " trying snapid " << q->first << dendl;
+ sin = mdcache->get_inode(head_in->ino(), q->first);
+ if (sin) {
+ assert(sin->first <= snapid);
+ break;
+ }
+ dout(10) << " didn't have " << head_in->ino() << " snapid " << q->first << dendl;
+ }
+ if (!sin && head_in->is_multiversion())
+ sin = head_in;
+ assert(sin);
+ }
+ _do_snap_update(sin, snapid, 0, sin->first - 1, client, NULL, NULL);
+ head_in->remove_need_snapflush(sin, snapid, client);
+ }
+ }
+}
+
+
+bool Locker::should_defer_client_cap_frozen(CInode *in)
+{
+ /*
+ * This policy needs to be AT LEAST as permissive as allowing a client request
+ * to go forward, or else a client request can release something, the release
+ * gets deferred, but the request gets processed and deadlocks because when the
+ * caps can't get revoked.
+ *
+ * Currently, a request wait if anything locked is freezing (can't
+ * auth_pin), which would avoid any deadlock with cap release. Thus @in
+ * _MUST_ be in the lock/auth_pin set.
+ *
+ * auth_pins==0 implies no unstable lock and not auth pinnned by
+ * client request, otherwise continue even it's freezing.
+ */
+ return (in->is_freezing() && in->get_num_auth_pins() == 0) || in->is_frozen();
+}
+
+/*
+ * This function DOES put the passed message before returning
+ */
+void Locker::handle_client_caps(MClientCaps *m)
+{
+ Session *session = static_cast<Session *>(m->get_connection()->get_priv());
+ client_t client = m->get_source().num();
+
+ snapid_t follows = m->get_snap_follows();
+ dout(7) << "handle_client_caps "
+ << ((m->flags & CLIENT_CAPS_SYNC) ? "sync" : "async")
+ << " on " << m->get_ino()
+ << " tid " << m->get_client_tid() << " follows " << follows
+ << " op " << ceph_cap_op_name(m->get_op()) << dendl;
+
+ if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) {
+ if (!session) {
+ dout(5) << " no session, dropping " << *m << dendl;
+ m->put();
+ return;
+ }
+ if (session->is_closed() ||
+ session->is_closing() ||
+ session->is_killing()) {
+ dout(7) << " session closed|closing|killing, dropping " << *m << dendl;
+ m->put();
+ return;
+ }
+ if (mds->is_reconnect() &&
+ m->get_dirty() && m->get_client_tid() > 0 &&
+ !session->have_completed_flush(m->get_client_tid())) {
+ mdcache->set_reconnected_dirty_caps(client, m->get_ino(), m->get_dirty());
+ }
+ mds->wait_for_replay(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+
+ if (m->get_client_tid() > 0 && session &&
+ session->have_completed_flush(m->get_client_tid())) {
+ dout(7) << "handle_client_caps already flushed tid " << m->get_client_tid()
+ << " for client." << client << dendl;
+ MClientCaps *ack;
+ if (m->get_op() == CEPH_CAP_OP_FLUSHSNAP) {
+ ack = new MClientCaps(CEPH_CAP_OP_FLUSHSNAP_ACK, m->get_ino(), 0, 0, 0, 0, 0,
+ m->get_dirty(), 0, mds->get_osd_epoch_barrier());
+ } else {
+ ack = new MClientCaps(CEPH_CAP_OP_FLUSH_ACK, m->get_ino(), 0, m->get_cap_id(),
+ m->get_seq(), m->get_caps(), 0, m->get_dirty(), 0,
+ mds->get_osd_epoch_barrier());
+ }
+ ack->set_snap_follows(follows);
+ ack->set_client_tid(m->get_client_tid());
+ mds->send_message_client_counted(ack, m->get_connection());
+ if (m->get_op() == CEPH_CAP_OP_FLUSHSNAP) {
+ m->put();
+ return;
+ } else {
+ // fall-thru because the message may release some caps
+ m->clear_dirty();
+ m->set_op(CEPH_CAP_OP_UPDATE);
+ }
+ }
+
+ // "oldest flush tid" > 0 means client uses unique TID for each flush
+ if (m->get_oldest_flush_tid() > 0 && session) {
+ if (session->trim_completed_flushes(m->get_oldest_flush_tid())) {
+ mds->mdlog->get_current_segment()->touched_sessions.insert(session->info.inst.name);
+
+ if (session->get_num_trim_flushes_warnings() > 0 &&
+ session->get_num_completed_flushes() * 2 < g_conf->mds_max_completed_flushes)
+ session->reset_num_trim_flushes_warnings();
+ } else {
+ if (session->get_num_completed_flushes() >=
+ (g_conf->mds_max_completed_flushes << session->get_num_trim_flushes_warnings())) {
+ session->inc_num_trim_flushes_warnings();
+ stringstream ss;
+ ss << "client." << session->get_client() << " does not advance its oldest_flush_tid ("
+ << m->get_oldest_flush_tid() << "), "
+ << session->get_num_completed_flushes()
+ << " completed flushes recorded in session";
+ mds->clog->warn() << ss.str();
+ dout(20) << __func__ << " " << ss.str() << dendl;
+ }
+ }
+ }
+
+ CInode *head_in = mdcache->get_inode(m->get_ino());
+ if (!head_in) {
+ if (mds->is_clientreplay()) {
+ dout(7) << "handle_client_caps on unknown ino " << m->get_ino()
+ << ", will try again after replayed client requests" << dendl;
+ mdcache->wait_replay_cap_reconnect(m->get_ino(), new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+ dout(1) << "handle_client_caps on unknown ino " << m->get_ino() << ", dropping" << dendl;
+ m->put();
+ return;
+ }
+
+ if (m->osd_epoch_barrier && !mds->objecter->have_map(m->osd_epoch_barrier)) {
+ // Pause RADOS operations until we see the required epoch
+ mds->objecter->set_epoch_barrier(m->osd_epoch_barrier);
+ }
+
+ if (mds->get_osd_epoch_barrier() < m->osd_epoch_barrier) {
+ // Record the barrier so that we will retransmit it to clients
+ mds->set_osd_epoch_barrier(m->osd_epoch_barrier);
+ }
+
+ CInode *in = head_in;
+ if (follows > 0) {
+ in = mdcache->pick_inode_snap(head_in, follows);
+ if (in != head_in)
+ dout(10) << " head inode " << *head_in << dendl;
+ }
+ dout(10) << " cap inode " << *in << dendl;
+
+ Capability *cap = 0;
+ cap = in->get_client_cap(client);
+ if (!cap && in != head_in)
+ cap = head_in->get_client_cap(client);
+ if (!cap) {
+ dout(7) << "handle_client_caps no cap for client." << client << " on " << *in << dendl;
+ m->put();
+ return;
+ }
+ assert(cap);
+
+ // freezing|frozen?
+ if (should_defer_client_cap_frozen(in)) {
+ dout(7) << "handle_client_caps freezing|frozen on " << *in << dendl;
+ in->add_waiter(CInode::WAIT_UNFREEZE, new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+ if (ceph_seq_cmp(m->get_mseq(), cap->get_mseq()) < 0) {
+ dout(7) << "handle_client_caps mseq " << m->get_mseq() << " < " << cap->get_mseq()
+ << ", dropping" << dendl;
+ m->put();
+ return;
+ }
+
+ int op = m->get_op();
+
+ // flushsnap?
+ if (op == CEPH_CAP_OP_FLUSHSNAP) {
+ if (!in->is_auth()) {
+ dout(7) << " not auth, ignoring flushsnap on " << *in << dendl;
+ goto out;
+ }
+
+ SnapRealm *realm = in->find_snaprealm();
+ snapid_t snap = realm->get_snap_following(follows);
+ dout(10) << " flushsnap follows " << follows << " -> snap " << snap << dendl;
+
+ // we can prepare the ack now, since this FLUSHEDSNAP is independent of any
+ // other cap ops. (except possibly duplicate FLUSHSNAP requests, but worst
+ // case we get a dup response, so whatever.)
+ MClientCaps *ack = 0;
+ if (m->get_dirty()) {
+ ack = new MClientCaps(CEPH_CAP_OP_FLUSHSNAP_ACK, in->ino(), 0, 0, 0, 0, 0, m->get_dirty(), 0, mds->get_osd_epoch_barrier());
+ ack->set_snap_follows(follows);
+ ack->set_client_tid(m->get_client_tid());
+ ack->set_oldest_flush_tid(m->get_oldest_flush_tid());
+ }
+
+ if (in == head_in ||
+ (head_in->client_need_snapflush.count(snap) &&
+ head_in->client_need_snapflush[snap].count(client))) {
+ dout(7) << " flushsnap snap " << snap
+ << " client." << client << " on " << *in << dendl;
+
+ // this cap now follows a later snap (i.e. the one initiating this flush, or later)
+ if (in == head_in)
+ cap->client_follows = snap < CEPH_NOSNAP ? snap : realm->get_newest_seq();
+ else if (head_in->client_need_snapflush.begin()->first < snap)
+ _do_null_snapflush(head_in, client, snap);
+
+ _do_snap_update(in, snap, m->get_dirty(), follows, client, m, ack);
+
+ if (in != head_in)
+ head_in->remove_need_snapflush(in, snap, client);
+
+ } else {
+ dout(7) << " not expecting flushsnap " << snap << " from client." << client << " on " << *in << dendl;
+ if (ack)
+ mds->send_message_client_counted(ack, m->get_connection());
+ }
+ goto out;
+ }
+
+ if (cap->get_cap_id() != m->get_cap_id()) {
+ dout(7) << " ignoring client capid " << m->get_cap_id() << " != my " << cap->get_cap_id() << dendl;
+ } else {
+ // intermediate snap inodes
+ while (in != head_in) {
+ assert(in->last != CEPH_NOSNAP);
+ if (in->is_auth() && m->get_dirty()) {
+ dout(10) << " updating intermediate snapped inode " << *in << dendl;
+ _do_cap_update(in, NULL, m->get_dirty(), follows, m);
+ }
+ in = mdcache->pick_inode_snap(head_in, in->last);
+ }
+
+ // head inode, and cap
+ MClientCaps *ack = 0;
+
+ int caps = m->get_caps();
+ if (caps & ~cap->issued()) {
+ dout(10) << " confirming not issued caps " << ccap_string(caps & ~cap->issued()) << dendl;
+ caps &= cap->issued();
+ }
+
+ cap->confirm_receipt(m->get_seq(), caps);
+ dout(10) << " follows " << follows
+ << " retains " << ccap_string(m->get_caps())
+ << " dirty " << ccap_string(m->get_dirty())
+ << " on " << *in << dendl;
+
+
+ // missing/skipped snapflush?
+ // The client MAY send a snapflush if it is issued WR/EXCL caps, but
+ // presently only does so when it has actual dirty metadata. But, we
+ // set up the need_snapflush stuff based on the issued caps.
+ // We can infer that the client WONT send a FLUSHSNAP once they have
+ // released all WR/EXCL caps (the FLUSHSNAP always comes before the cap
+ // update/release).
+ if (!head_in->client_need_snapflush.empty()) {
+ if ((cap->issued() & CEPH_CAP_ANY_FILE_WR) == 0) {
+ _do_null_snapflush(head_in, client);
+ } else {
+ dout(10) << " revocation in progress, not making any conclusions about null snapflushes" << dendl;
+ }
+ }
+
+ if (m->get_dirty() && in->is_auth()) {
+ dout(7) << " flush client." << client << " dirty " << ccap_string(m->get_dirty())
+ << " seq " << m->get_seq() << " on " << *in << dendl;
+ ack = new MClientCaps(CEPH_CAP_OP_FLUSH_ACK, in->ino(), 0, cap->get_cap_id(), m->get_seq(),
+ m->get_caps(), 0, m->get_dirty(), 0, mds->get_osd_epoch_barrier());
+ ack->set_client_tid(m->get_client_tid());
+ ack->set_oldest_flush_tid(m->get_oldest_flush_tid());
+ }
+
+ // filter wanted based on what we could ever give out (given auth/replica status)
+ bool need_flush = m->flags & CLIENT_CAPS_SYNC;
+ int new_wanted = m->get_wanted() & head_in->get_caps_allowed_ever();
+ if (new_wanted != cap->wanted()) {
+ if (!need_flush && (new_wanted & ~cap->pending())) {
+ // exapnding caps. make sure we aren't waiting for a log flush
+ need_flush = _need_flush_mdlog(head_in, new_wanted & ~cap->pending());
+ }
+
+ adjust_cap_wanted(cap, new_wanted, m->get_issue_seq());
+ }
+
+ if (in->is_auth() &&
+ _do_cap_update(in, cap, m->get_dirty(), follows, m, ack, &need_flush)) {
+ // updated
+ eval(in, CEPH_CAP_LOCKS);
+
+ if (!need_flush && (cap->wanted() & ~cap->pending()))
+ need_flush = _need_flush_mdlog(in, cap->wanted() & ~cap->pending());
+ } else {
+ // no update, ack now.
+ if (ack)
+ mds->send_message_client_counted(ack, m->get_connection());
+
+ bool did_issue = eval(in, CEPH_CAP_LOCKS);
+ if (!did_issue && (cap->wanted() & ~cap->pending()))
+ issue_caps(in, cap);
+
+ if (cap->get_last_seq() == 0 &&
+ (cap->pending() & (CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER))) {
+ cap->issue_norevoke(cap->issued());
+ share_inode_max_size(in, cap);
+ }
+ }
+
+ if (need_flush)
+ mds->mdlog->flush();
+ }
+
+ out:
+ m->put();
+}
+
+
+class C_Locker_RetryRequestCapRelease : public LockerContext {
+ client_t client;
+ ceph_mds_request_release item;
+public:
+ C_Locker_RetryRequestCapRelease(Locker *l, client_t c, const ceph_mds_request_release& it) :
+ LockerContext(l), client(c), item(it) { }
+ void finish(int r) override {
+ string dname;
+ MDRequestRef null_ref;
+ locker->process_request_cap_release(null_ref, client, item, dname);
+ }
+};
+
+void Locker::process_request_cap_release(MDRequestRef& mdr, client_t client, const ceph_mds_request_release& item,
+ const string &dname)
+{
+ inodeno_t ino = (uint64_t)item.ino;
+ uint64_t cap_id = item.cap_id;
+ int caps = item.caps;
+ int wanted = item.wanted;
+ int seq = item.seq;
+ int issue_seq = item.issue_seq;
+ int mseq = item.mseq;
+
+ CInode *in = mdcache->get_inode(ino);
+ if (!in)
+ return;
+
+ if (dname.length()) {
+ frag_t fg = in->pick_dirfrag(dname);
+ CDir *dir = in->get_dirfrag(fg);
+ if (dir) {
+ CDentry *dn = dir->lookup(dname);
+ if (dn) {
+ ClientLease *l = dn->get_client_lease(client);
+ if (l) {
+ dout(10) << "process_cap_release removing lease on " << *dn << dendl;
+ dn->remove_client_lease(l, this);
+ } else {
+ dout(7) << "process_cap_release client." << client
+ << " doesn't have lease on " << *dn << dendl;
+ }
+ } else {
+ dout(7) << "process_cap_release client." << client << " released lease on dn "
+ << dir->dirfrag() << "/" << dname << " which dne" << dendl;
+ }
+ }
+ }
+
+ Capability *cap = in->get_client_cap(client);
+ if (!cap)
+ return;
+
+ dout(10) << "process_cap_release client." << client << " " << ccap_string(caps) << " on " << *in
+ << (mdr ? "" : " (DEFERRED, no mdr)")
+ << dendl;
+
+ if (ceph_seq_cmp(mseq, cap->get_mseq()) < 0) {
+ dout(7) << " mseq " << mseq << " < " << cap->get_mseq() << ", dropping" << dendl;
+ return;
+ }
+
+ if (cap->get_cap_id() != cap_id) {
+ dout(7) << " cap_id " << cap_id << " != " << cap->get_cap_id() << ", dropping" << dendl;
+ return;
+ }
+
+ if (should_defer_client_cap_frozen(in)) {
+ dout(7) << " frozen, deferring" << dendl;
+ in->add_waiter(CInode::WAIT_UNFREEZE, new C_Locker_RetryRequestCapRelease(this, client, item));
+ return;
+ }
+
+ if (caps & ~cap->issued()) {
+ dout(10) << " confirming not issued caps " << ccap_string(caps & ~cap->issued()) << dendl;
+ caps &= cap->issued();
+ }
+ cap->confirm_receipt(seq, caps);
+
+ if (!in->client_need_snapflush.empty() &&
+ (cap->issued() & CEPH_CAP_ANY_FILE_WR) == 0) {
+ _do_null_snapflush(in, client);
+ }
+
+ adjust_cap_wanted(cap, wanted, issue_seq);
+
+ if (mdr)
+ cap->inc_suppress();
+ eval(in, CEPH_CAP_LOCKS);
+ if (mdr)
+ cap->dec_suppress();
+
+ // take note; we may need to reissue on this cap later
+ if (mdr)
+ mdr->cap_releases[in->vino()] = cap->get_last_seq();
+}
+
+class C_Locker_RetryKickIssueCaps : public LockerContext {
+ CInode *in;
+ client_t client;
+ ceph_seq_t seq;
+public:
+ C_Locker_RetryKickIssueCaps(Locker *l, CInode *i, client_t c, ceph_seq_t s) :
+ LockerContext(l), in(i), client(c), seq(s) {
+ in->get(CInode::PIN_PTRWAITER);
+ }
+ void finish(int r) override {
+ locker->kick_issue_caps(in, client, seq);
+ in->put(CInode::PIN_PTRWAITER);
+ }
+};
+
+void Locker::kick_issue_caps(CInode *in, client_t client, ceph_seq_t seq)
+{
+ Capability *cap = in->get_client_cap(client);
+ if (!cap || cap->get_last_sent() != seq)
+ return;
+ if (in->is_frozen()) {
+ dout(10) << "kick_issue_caps waiting for unfreeze on " << *in << dendl;
+ in->add_waiter(CInode::WAIT_UNFREEZE,
+ new C_Locker_RetryKickIssueCaps(this, in, client, seq));
+ return;
+ }
+ dout(10) << "kick_issue_caps released at current seq " << seq
+ << ", reissuing" << dendl;
+ issue_caps(in, cap);
+}
+
+void Locker::kick_cap_releases(MDRequestRef& mdr)
+{
+ client_t client = mdr->get_client();
+ for (map<vinodeno_t,ceph_seq_t>::iterator p = mdr->cap_releases.begin();
+ p != mdr->cap_releases.end();
+ ++p) {
+ CInode *in = mdcache->get_inode(p->first);
+ if (!in)
+ continue;
+ kick_issue_caps(in, client, p->second);
+ }
+}
+
+/**
+ * m and ack might be NULL, so don't dereference them unless dirty != 0
+ */
+void Locker::_do_snap_update(CInode *in, snapid_t snap, int dirty, snapid_t follows, client_t client, MClientCaps *m, MClientCaps *ack)
+{
+ dout(10) << "_do_snap_update dirty " << ccap_string(dirty)
+ << " follows " << follows << " snap " << snap
+ << " on " << *in << dendl;
+
+ if (snap == CEPH_NOSNAP) {
+ // hmm, i guess snap was already deleted? just ack!
+ dout(10) << " wow, the snap following " << follows
+ << " was already deleted. nothing to record, just ack." << dendl;
+ if (ack)
+ mds->send_message_client_counted(ack, m->get_connection());
+ return;
+ }
+
+ EUpdate *le = new EUpdate(mds->mdlog, "snap flush");
+ mds->mdlog->start_entry(le);
+ MutationRef mut = new MutationImpl();
+ mut->ls = mds->mdlog->get_current_segment();
+
+ // normal metadata updates that we can apply to the head as well.
+
+ // update xattrs?
+ bool xattrs = false;
+ map<string,bufferptr> *px = 0;
+ if ((dirty & CEPH_CAP_XATTR_EXCL) &&
+ m->xattrbl.length() &&
+ m->head.xattr_version > in->get_projected_inode()->xattr_version)
+ xattrs = true;
+
+ old_inode_t *oi = 0;
+ if (in->is_multiversion()) {
+ oi = in->pick_old_inode(snap);
+ }
+
+ inode_t *pi;
+ if (oi) {
+ dout(10) << " writing into old inode" << dendl;
+ pi = in->project_inode();
+ pi->version = in->pre_dirty();
+ if (snap > oi->first)
+ in->split_old_inode(snap);
+ pi = &oi->inode;
+ if (xattrs)
+ px = &oi->xattrs;
+ } else {
+ if (xattrs)
+ px = new map<string,bufferptr>;
+ pi = in->project_inode(px);
+ pi->version = in->pre_dirty();
+ }
+
+ _update_cap_fields(in, dirty, m, pi);
+
+ // xattr
+ if (px) {
+ dout(7) << " xattrs v" << pi->xattr_version << " -> " << m->head.xattr_version
+ << " len " << m->xattrbl.length() << dendl;
+ pi->xattr_version = m->head.xattr_version;
+ bufferlist::iterator p = m->xattrbl.begin();
+ ::decode(*px, p);
+ }
+
+ if (pi->client_ranges.count(client)) {
+ if (in->last == snap) {
+ dout(10) << " removing client_range entirely" << dendl;
+ pi->client_ranges.erase(client);
+ } else {
+ dout(10) << " client_range now follows " << snap << dendl;
+ pi->client_ranges[client].follows = snap;
+ }
+ }
+
+ mut->auth_pin(in);
+ mdcache->predirty_journal_parents(mut, &le->metablob, in, 0, PREDIRTY_PRIMARY, 0, follows);
+ mdcache->journal_dirty_inode(mut.get(), &le->metablob, in, follows);
+
+ // "oldest flush tid" > 0 means client uses unique TID for each flush
+ if (ack && ack->get_oldest_flush_tid() > 0)
+ le->metablob.add_client_flush(metareqid_t(m->get_source(), ack->get_client_tid()),
+ ack->get_oldest_flush_tid());
+
+ mds->mdlog->submit_entry(le, new C_Locker_FileUpdate_finish(this, in, mut, false, false,
+ client, ack));
+}
+
+void Locker::_update_cap_fields(CInode *in, int dirty, MClientCaps *m, inode_t *pi)
+{
+ if (dirty == 0)
+ return;
+
+ /* m must be valid if there are dirty caps */
+ assert(m);
+ uint64_t features = m->get_connection()->get_features();
+
+ if (m->get_ctime() > pi->ctime) {
+ dout(7) << " ctime " << pi->ctime << " -> " << m->get_ctime()
+ << " for " << *in << dendl;
+ pi->ctime = m->get_ctime();
+ }
+
+ if ((features & CEPH_FEATURE_FS_CHANGE_ATTR) &&
+ m->get_change_attr() > pi->change_attr) {
+ dout(7) << " change_attr " << pi->change_attr << " -> " << m->get_change_attr()
+ << " for " << *in << dendl;
+ pi->change_attr = m->get_change_attr();
+ }
+
+ // file
+ if (dirty & (CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR)) {
+ utime_t atime = m->get_atime();
+ utime_t mtime = m->get_mtime();
+ uint64_t size = m->get_size();
+ version_t inline_version = m->inline_version;
+
+ if (((dirty & CEPH_CAP_FILE_WR) && mtime > pi->mtime) ||
+ ((dirty & CEPH_CAP_FILE_EXCL) && mtime != pi->mtime)) {
+ dout(7) << " mtime " << pi->mtime << " -> " << mtime
+ << " for " << *in << dendl;
+ pi->mtime = mtime;
+ }
+ if (in->inode.is_file() && // ONLY if regular file
+ size > pi->size) {
+ dout(7) << " size " << pi->size << " -> " << size
+ << " for " << *in << dendl;
+ pi->size = size;
+ pi->rstat.rbytes = size;
+ }
+ if (in->inode.is_file() &&
+ (dirty & CEPH_CAP_FILE_WR) &&
+ inline_version > pi->inline_data.version) {
+ pi->inline_data.version = inline_version;
+ if (inline_version != CEPH_INLINE_NONE && m->inline_data.length() > 0)
+ pi->inline_data.get_data() = m->inline_data;
+ else
+ pi->inline_data.free_data();
+ }
+ if ((dirty & CEPH_CAP_FILE_EXCL) && atime != pi->atime) {
+ dout(7) << " atime " << pi->atime << " -> " << atime
+ << " for " << *in << dendl;
+ pi->atime = atime;
+ }
+ if ((dirty & CEPH_CAP_FILE_EXCL) &&
+ ceph_seq_cmp(pi->time_warp_seq, m->get_time_warp_seq()) < 0) {
+ dout(7) << " time_warp_seq " << pi->time_warp_seq << " -> " << m->get_time_warp_seq()
+ << " for " << *in << dendl;
+ pi->time_warp_seq = m->get_time_warp_seq();
+ }
+ }
+ // auth
+ if (dirty & CEPH_CAP_AUTH_EXCL) {
+ if (m->head.uid != pi->uid) {
+ dout(7) << " uid " << pi->uid
+ << " -> " << m->head.uid
+ << " for " << *in << dendl;
+ pi->uid = m->head.uid;
+ }
+ if (m->head.gid != pi->gid) {
+ dout(7) << " gid " << pi->gid
+ << " -> " << m->head.gid
+ << " for " << *in << dendl;
+ pi->gid = m->head.gid;
+ }
+ if (m->head.mode != pi->mode) {
+ dout(7) << " mode " << oct << pi->mode
+ << " -> " << m->head.mode << dec
+ << " for " << *in << dendl;
+ pi->mode = m->head.mode;
+ }
+ if ((features & CEPH_FEATURE_FS_BTIME) && m->get_btime() != pi->btime) {
+ dout(7) << " btime " << oct << pi->btime
+ << " -> " << m->get_btime() << dec
+ << " for " << *in << dendl;
+ pi->btime = m->get_btime();
+ }
+ }
+}
+
+/*
+ * update inode based on cap flush|flushsnap|wanted.
+ * adjust max_size, if needed.
+ * if we update, return true; otherwise, false (no updated needed).
+ */
+bool Locker::_do_cap_update(CInode *in, Capability *cap,
+ int dirty, snapid_t follows,
+ MClientCaps *m, MClientCaps *ack,
+ bool *need_flush)
+{
+ dout(10) << "_do_cap_update dirty " << ccap_string(dirty)
+ << " issued " << ccap_string(cap ? cap->issued() : 0)
+ << " wanted " << ccap_string(cap ? cap->wanted() : 0)
+ << " on " << *in << dendl;
+ assert(in->is_auth());
+ client_t client = m->get_source().num();
+ inode_t *latest = in->get_projected_inode();
+
+ // increase or zero max_size?
+ uint64_t size = m->get_size();
+ bool change_max = false;
+ uint64_t old_max = latest->client_ranges.count(client) ? latest->client_ranges[client].range.last : 0;
+ uint64_t new_max = old_max;
+
+ if (in->is_file()) {
+ bool forced_change_max = false;
+ dout(20) << "inode is file" << dendl;
+ if (cap && ((cap->issued() | cap->wanted()) & CEPH_CAP_ANY_FILE_WR)) {
+ dout(20) << "client has write caps; m->get_max_size="
+ << m->get_max_size() << "; old_max=" << old_max << dendl;
+ if (m->get_max_size() > new_max) {
+ dout(10) << "client requests file_max " << m->get_max_size()
+ << " > max " << old_max << dendl;
+ change_max = true;
+ forced_change_max = true;
+ new_max = calc_new_max_size(latest, m->get_max_size());
+ } else {
+ new_max = calc_new_max_size(latest, size);
+
+ if (new_max > old_max)
+ change_max = true;
+ else
+ new_max = old_max;
+ }
+ } else {
+ if (old_max) {
+ change_max = true;
+ new_max = 0;
+ }
+ }
+
+ if (in->last == CEPH_NOSNAP &&
+ change_max &&
+ !in->filelock.can_wrlock(client) &&
+ !in->filelock.can_force_wrlock(client)) {
+ dout(10) << " i want to change file_max, but lock won't allow it (yet)" << dendl;
+ if (in->filelock.is_stable()) {
+ bool need_issue = false;
+ if (cap)
+ cap->inc_suppress();
+ if (in->mds_caps_wanted.empty() &&
+ (in->get_loner() >= 0 || (in->get_wanted_loner() >= 0 && in->try_set_loner()))) {
+ if (in->filelock.get_state() != LOCK_EXCL)
+ file_excl(&in->filelock, &need_issue);
+ } else
+ simple_lock(&in->filelock, &need_issue);
+ if (need_issue)
+ issue_caps(in);
+ if (cap)
+ cap->dec_suppress();
+ }
+ if (!in->filelock.can_wrlock(client) &&
+ !in->filelock.can_force_wrlock(client)) {
+ C_MDL_CheckMaxSize *cms = new C_MDL_CheckMaxSize(this, in,
+ forced_change_max ? new_max : 0,
+ 0, utime_t());
+
+ in->filelock.add_waiter(SimpleLock::WAIT_STABLE, cms);
+ change_max = false;
+ }
+ }
+ }
+
+ if (m->flockbl.length()) {
+ int32_t num_locks;
+ bufferlist::iterator bli = m->flockbl.begin();
+ ::decode(num_locks, bli);
+ for ( int i=0; i < num_locks; ++i) {
+ ceph_filelock decoded_lock;
+ ::decode(decoded_lock, bli);
+ in->get_fcntl_lock_state()->held_locks.
+ insert(pair<uint64_t, ceph_filelock>(decoded_lock.start, decoded_lock));
+ ++in->get_fcntl_lock_state()->client_held_lock_counts[(client_t)(decoded_lock.client)];
+ }
+ ::decode(num_locks, bli);
+ for ( int i=0; i < num_locks; ++i) {
+ ceph_filelock decoded_lock;
+ ::decode(decoded_lock, bli);
+ in->get_flock_lock_state()->held_locks.
+ insert(pair<uint64_t, ceph_filelock>(decoded_lock.start, decoded_lock));
+ ++in->get_flock_lock_state()->client_held_lock_counts[(client_t)(decoded_lock.client)];
+ }
+ }
+
+ if (!dirty && !change_max)
+ return false;
+
+ Session *session = static_cast<Session *>(m->get_connection()->get_priv());
+ if (session->check_access(in, MAY_WRITE,
+ m->caller_uid, m->caller_gid, NULL, 0, 0) < 0) {
+ session->put();
+ dout(10) << "check_access failed, dropping cap update on " << *in << dendl;
+ return false;
+ }
+ session->put();
+
+ // do the update.
+ EUpdate *le = new EUpdate(mds->mdlog, "cap update");
+ mds->mdlog->start_entry(le);
+
+ // xattrs update?
+ map<string,bufferptr> *px = 0;
+ if ((dirty & CEPH_CAP_XATTR_EXCL) &&
+ m->xattrbl.length() &&
+ m->head.xattr_version > in->get_projected_inode()->xattr_version)
+ px = new map<string,bufferptr>;
+
+ inode_t *pi = in->project_inode(px);
+ pi->version = in->pre_dirty();
+
+ MutationRef mut(new MutationImpl());
+ mut->ls = mds->mdlog->get_current_segment();
+
+ _update_cap_fields(in, dirty, m, pi);
+
+ if (change_max) {
+ dout(7) << " max_size " << old_max << " -> " << new_max
+ << " for " << *in << dendl;
+ if (new_max) {
+ pi->client_ranges[client].range.first = 0;
+ pi->client_ranges[client].range.last = new_max;
+ pi->client_ranges[client].follows = in->first - 1;
+ } else
+ pi->client_ranges.erase(client);
+ }
+
+ if (change_max || (dirty & (CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR)))
+ wrlock_force(&in->filelock, mut); // wrlock for duration of journal
+
+ // auth
+ if (dirty & CEPH_CAP_AUTH_EXCL)
+ wrlock_force(&in->authlock, mut);
+
+ // xattr
+ if (px) {
+ dout(7) << " xattrs v" << pi->xattr_version << " -> " << m->head.xattr_version << dendl;
+ pi->xattr_version = m->head.xattr_version;
+ bufferlist::iterator p = m->xattrbl.begin();
+ ::decode(*px, p);
+
+ wrlock_force(&in->xattrlock, mut);
+ }
+
+ mut->auth_pin(in);
+ mdcache->predirty_journal_parents(mut, &le->metablob, in, 0, PREDIRTY_PRIMARY, 0, follows);
+ mdcache->journal_dirty_inode(mut.get(), &le->metablob, in, follows);
+
+ // "oldest flush tid" > 0 means client uses unique TID for each flush
+ if (ack && ack->get_oldest_flush_tid() > 0)
+ le->metablob.add_client_flush(metareqid_t(m->get_source(), ack->get_client_tid()),
+ ack->get_oldest_flush_tid());
+
+ mds->mdlog->submit_entry(le, new C_Locker_FileUpdate_finish(this, in, mut,
+ change_max, !!cap,
+ client, ack));
+ if (need_flush && !*need_flush &&
+ ((change_max && new_max) || // max INCREASE
+ _need_flush_mdlog(in, dirty)))
+ *need_flush = true;
+
+ return true;
+}
+
+/* This function DOES put the passed message before returning */
+void Locker::handle_client_cap_release(MClientCapRelease *m)
+{
+ client_t client = m->get_source().num();
+ dout(10) << "handle_client_cap_release " << *m << dendl;
+
+ if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) {
+ mds->wait_for_replay(new C_MDS_RetryMessage(mds, m));
+ return;
+ }
+
+ if (m->osd_epoch_barrier && !mds->objecter->have_map(m->osd_epoch_barrier)) {
+ // Pause RADOS operations until we see the required epoch
+ mds->objecter->set_epoch_barrier(m->osd_epoch_barrier);
+ }
+
+ if (mds->get_osd_epoch_barrier() < m->osd_epoch_barrier) {
+ // Record the barrier so that we will retransmit it to clients
+ mds->set_osd_epoch_barrier(m->osd_epoch_barrier);
+ }
+
+ Session *session = static_cast<Session *>(m->get_connection()->get_priv());
+
+ for (vector<ceph_mds_cap_item>::iterator p = m->caps.begin(); p != m->caps.end(); ++p) {
+ _do_cap_release(client, inodeno_t((uint64_t)p->ino) , p->cap_id, p->migrate_seq, p->seq);
+ }
+
+ if (session) {
+ session->notify_cap_release(m->caps.size());
+ }
+
+ m->put();
+}
+
+class C_Locker_RetryCapRelease : public LockerContext {
+ client_t client;
+ inodeno_t ino;
+ uint64_t cap_id;
+ ceph_seq_t migrate_seq;
+ ceph_seq_t issue_seq;
+public:
+ C_Locker_RetryCapRelease(Locker *l, client_t c, inodeno_t i, uint64_t id,
+ ceph_seq_t mseq, ceph_seq_t seq) :
+ LockerContext(l), client(c), ino(i), cap_id(id), migrate_seq(mseq), issue_seq(seq) {}
+ void finish(int r) override {
+ locker->_do_cap_release(client, ino, cap_id, migrate_seq, issue_seq);
+ }
+};
+
+void Locker::_do_cap_release(client_t client, inodeno_t ino, uint64_t cap_id,
+ ceph_seq_t mseq, ceph_seq_t seq)
+{
+ CInode *in = mdcache->get_inode(ino);
+ if (!in) {
+ dout(7) << "_do_cap_release missing ino " << ino << dendl;
+ return;
+ }
+ Capability *cap = in->get_client_cap(client);
+ if (!cap) {
+ dout(7) << "_do_cap_release no cap for client" << client << " on "<< *in << dendl;
+ return;
+ }
+
+ dout(7) << "_do_cap_release for client." << client << " on "<< *in << dendl;
+ if (cap->get_cap_id() != cap_id) {
+ dout(7) << " capid " << cap_id << " != " << cap->get_cap_id() << ", ignore" << dendl;
+ return;
+ }
+ if (ceph_seq_cmp(mseq, cap->get_mseq()) < 0) {
+ dout(7) << " mseq " << mseq << " < " << cap->get_mseq() << ", ignore" << dendl;
+ return;
+ }
+ if (should_defer_client_cap_frozen(in)) {
+ dout(7) << " freezing|frozen, deferring" << dendl;
+ in->add_waiter(CInode::WAIT_UNFREEZE,
+ new C_Locker_RetryCapRelease(this, client, ino, cap_id, mseq, seq));
+ return;
+ }
+ if (seq != cap->get_last_issue()) {
+ dout(7) << " issue_seq " << seq << " != " << cap->get_last_issue() << dendl;
+ // clean out any old revoke history
+ cap->clean_revoke_from(seq);
+ eval_cap_gather(in);
+ return;
+ }
+ remove_client_cap(in, client);
+}
+
+/* This function DOES put the passed message before returning */
+
+void Locker::remove_client_cap(CInode *in, client_t client)
+{
+ // clean out any pending snapflush state
+ if (!in->client_need_snapflush.empty())
+ _do_null_snapflush(in, client);
+
+ in->remove_client_cap(client);
+
+ if (in->is_auth()) {
+ // make sure we clear out the client byte range
+ if (in->get_projected_inode()->client_ranges.count(client) &&
+ !(in->inode.nlink == 0 && !in->is_any_caps())) // unless it's unlink + stray
+ check_inode_max_size(in);
+ } else {
+ request_inode_file_caps(in);
+ }
+
+ try_eval(in, CEPH_CAP_LOCKS);
+}
+
+
+/**
+ * Return true if any currently revoking caps exceed the
+ * mds_revoke_cap_timeout threshold.
+ */
+bool Locker::any_late_revoking_caps(xlist<Capability*> const &revoking) const
+{
+ xlist<Capability*>::const_iterator p = revoking.begin();
+ if (p.end()) {
+ // No revoking caps at the moment
+ return false;
+ } else {
+ utime_t now = ceph_clock_now();
+ utime_t age = now - (*p)->get_last_revoke_stamp();
+ if (age <= g_conf->mds_revoke_cap_timeout) {
+ return false;
+ } else {
+ return true;
+ }
+ }
+}
+
+
+void Locker::get_late_revoking_clients(std::list<client_t> *result) const
+{
+ if (!any_late_revoking_caps(revoking_caps)) {
+ // Fast path: no misbehaving clients, execute in O(1)
+ return;
+ }
+
+ // Slow path: execute in O(N_clients)
+ std::map<client_t, xlist<Capability*> >::const_iterator client_rc_iter;
+ for (client_rc_iter = revoking_caps_by_client.begin();
+ client_rc_iter != revoking_caps_by_client.end(); ++client_rc_iter) {
+ xlist<Capability*> const &client_rc = client_rc_iter->second;
+ bool any_late = any_late_revoking_caps(client_rc);
+ if (any_late) {
+ result->push_back(client_rc_iter->first);
+ }
+ }
+}
+
+// Hard-code instead of surfacing a config settings because this is
+// really a hack that should go away at some point when we have better
+// inspection tools for getting at detailed cap state (#7316)
+#define MAX_WARN_CAPS 100
+
+void Locker::caps_tick()
+{
+ utime_t now = ceph_clock_now();
+
+ dout(20) << __func__ << " " << revoking_caps.size() << " revoking caps" << dendl;
+
+ int i = 0;
+ for (xlist<Capability*>::iterator p = revoking_caps.begin(); !p.end(); ++p) {
+ Capability *cap = *p;
+
+ utime_t age = now - cap->get_last_revoke_stamp();
+ dout(20) << __func__ << " age = " << age << cap->get_client() << "." << cap->get_inode()->ino() << dendl;
+ if (age <= g_conf->mds_revoke_cap_timeout) {
+ dout(20) << __func__ << " age below timeout " << g_conf->mds_revoke_cap_timeout << dendl;
+ break;
+ } else {
+ ++i;
+ if (i > MAX_WARN_CAPS) {
+ dout(1) << __func__ << " more than " << MAX_WARN_CAPS << " caps are late"
+ << "revoking, ignoring subsequent caps" << dendl;
+ break;
+ }
+ }
+ // exponential backoff of warning intervals
+ if (age > g_conf->mds_revoke_cap_timeout * (1 << cap->get_num_revoke_warnings())) {
+ cap->inc_num_revoke_warnings();
+ stringstream ss;
+ ss << "client." << cap->get_client() << " isn't responding to mclientcaps(revoke), ino "
+ << cap->get_inode()->ino() << " pending " << ccap_string(cap->pending())
+ << " issued " << ccap_string(cap->issued()) << ", sent " << age << " seconds ago";
+ mds->clog->warn() << ss.str();
+ dout(20) << __func__ << " " << ss.str() << dendl;
+ } else {
+ dout(20) << __func__ << " silencing log message (backoff) for " << cap->get_client() << "." << cap->get_inode()->ino() << dendl;
+ }
+ }
+}
+
+
+void Locker::handle_client_lease(MClientLease *m)
+{
+ dout(10) << "handle_client_lease " << *m << dendl;
+
+ assert(m->get_source().is_client());
+ client_t client = m->get_source().num();
+
+ CInode *in = mdcache->get_inode(m->get_ino(), m->get_last());
+ if (!in) {
+ dout(7) << "handle_client_lease don't have ino " << m->get_ino() << "." << m->get_last() << dendl;
+ m->put();
+ return;
+ }
+ CDentry *dn = 0;
+
+ frag_t fg = in->pick_dirfrag(m->dname);
+ CDir *dir = in->get_dirfrag(fg);
+ if (dir)
+ dn = dir->lookup(m->dname);
+ if (!dn) {
+ dout(7) << "handle_client_lease don't have dn " << m->get_ino() << " " << m->dname << dendl;
+ m->put();
+ return;
+ }
+ dout(10) << " on " << *dn << dendl;
+
+ // replica and lock
+ ClientLease *l = dn->get_client_lease(client);
+ if (!l) {
+ dout(7) << "handle_client_lease didn't have lease for client." << client << " of " << *dn << dendl;
+ m->put();
+ return;
+ }
+
+ switch (m->get_action()) {
+ case CEPH_MDS_LEASE_REVOKE_ACK:
+ case CEPH_MDS_LEASE_RELEASE:
+ if (l->seq != m->get_seq()) {
+ dout(7) << "handle_client_lease release - seq " << l->seq << " != provided " << m->get_seq() << dendl;
+ } else {
+ dout(7) << "handle_client_lease client." << client
+ << " on " << *dn << dendl;
+ dn->remove_client_lease(l, this);
+ }
+ m->put();
+ break;
+
+ case CEPH_MDS_LEASE_RENEW:
+ {
+ dout(7) << "handle_client_lease client." << client << " renew on " << *dn
+ << (!dn->lock.can_lease(client)?", revoking lease":"") << dendl;
+ if (dn->lock.can_lease(client)) {
+ int pool = 1; // fixme.. do something smart!
+ m->h.duration_ms = (int)(1000 * mdcache->client_lease_durations[pool]);
+ m->h.seq = ++l->seq;
+ m->clear_payload();
+
+ utime_t now = ceph_clock_now();
+ now += mdcache->client_lease_durations[pool];
+ mdcache->touch_client_lease(l, pool, now);
+
+ mds->send_message_client_counted(m, m->get_connection());
+ }
+ }
+ break;
+
+ default:
+ ceph_abort(); // implement me
+ break;
+ }
+}
+
+
+void Locker::issue_client_lease(CDentry *dn, client_t client,
+ bufferlist &bl, utime_t now, Session *session)
+{
+ CInode *diri = dn->get_dir()->get_inode();
+ if (!diri->is_stray() && // do not issue dn leases in stray dir!
+ ((!diri->filelock.can_lease(client) &&
+ (diri->get_client_cap_pending(client) & (CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL)) == 0)) &&
+ dn->lock.can_lease(client)) {
+ int pool = 1; // fixme.. do something smart!
+ // issue a dentry lease
+ ClientLease *l = dn->add_client_lease(client, session);
+ session->touch_lease(l);
+
+ now += mdcache->client_lease_durations[pool];
+ mdcache->touch_client_lease(l, pool, now);
+
+ LeaseStat e;
+ e.mask = 1 | CEPH_LOCK_DN; // old and new bit values
+ e.seq = ++l->seq;
+ e.duration_ms = (int)(1000 * mdcache->client_lease_durations[pool]);
+ ::encode(e, bl);
+ dout(20) << "issue_client_lease seq " << e.seq << " dur " << e.duration_ms << "ms "
+ << " on " << *dn << dendl;
+ } else {
+ // null lease
+ LeaseStat e;
+ e.mask = 0;
+ e.seq = 0;
+ e.duration_ms = 0;
+ ::encode(e, bl);
+ dout(20) << "issue_client_lease no/null lease on " << *dn << dendl;
+ }
+}
+
+
+void Locker::revoke_client_leases(SimpleLock *lock)
+{
+ int n = 0;
+ CDentry *dn = static_cast<CDentry*>(lock->get_parent());
+ for (map<client_t, ClientLease*>::iterator p = dn->client_lease_map.begin();
+ p != dn->client_lease_map.end();
+ ++p) {
+ ClientLease *l = p->second;
+
+ n++;
+ assert(lock->get_type() == CEPH_LOCK_DN);
+
+ CDentry *dn = static_cast<CDentry*>(lock->get_parent());
+ int mask = 1 | CEPH_LOCK_DN; // old and new bits
+
+ // i should also revoke the dir ICONTENT lease, if they have it!
+ CInode *diri = dn->get_dir()->get_inode();
+ mds->send_message_client_counted(new MClientLease(CEPH_MDS_LEASE_REVOKE, l->seq,
+ mask,
+ diri->ino(),
+ diri->first, CEPH_NOSNAP,
+ dn->get_name()),
+ l->client);
+ }
+ assert(n == lock->get_num_client_lease());
+}
+
+
+
+// locks ----------------------------------------------------------------
+
+SimpleLock *Locker::get_lock(int lock_type, MDSCacheObjectInfo &info)
+{
+ switch (lock_type) {
+ case CEPH_LOCK_DN:
+ {
+ // be careful; info.dirfrag may have incorrect frag; recalculate based on dname.
+ CInode *diri = mdcache->get_inode(info.dirfrag.ino);
+ frag_t fg;
+ CDir *dir = 0;
+ CDentry *dn = 0;
+ if (diri) {
+ fg = diri->pick_dirfrag(info.dname);
+ dir = diri->get_dirfrag(fg);
+ if (dir)
+ dn = dir->lookup(info.dname, info.snapid);
+ }
+ if (!dn) {
+ dout(7) << "get_lock don't have dn " << info.dirfrag.ino << " " << info.dname << dendl;
+ return 0;
+ }
+ return &dn->lock;
+ }
+
+ case CEPH_LOCK_IAUTH:
+ case CEPH_LOCK_ILINK:
+ case CEPH_LOCK_IDFT:
+ case CEPH_LOCK_IFILE:
+ case CEPH_LOCK_INEST:
+ case CEPH_LOCK_IXATTR:
+ case CEPH_LOCK_ISNAP:
+ case CEPH_LOCK_IFLOCK:
+ case CEPH_LOCK_IPOLICY:
+ {
+ CInode *in = mdcache->get_inode(info.ino, info.snapid);
+ if (!in) {
+ dout(7) << "get_lock don't have ino " << info.ino << dendl;
+ return 0;
+ }
+ switch (lock_type) {
+ case CEPH_LOCK_IAUTH: return &in->authlock;
+ case CEPH_LOCK_ILINK: return &in->linklock;
+ case CEPH_LOCK_IDFT: return &in->dirfragtreelock;
+ case CEPH_LOCK_IFILE: return &in->filelock;
+ case CEPH_LOCK_INEST: return &in->nestlock;
+ case CEPH_LOCK_IXATTR: return &in->xattrlock;
+ case CEPH_LOCK_ISNAP: return &in->snaplock;
+ case CEPH_LOCK_IFLOCK: return &in->flocklock;
+ case CEPH_LOCK_IPOLICY: return &in->policylock;
+ }
+ }
+
+ default:
+ dout(7) << "get_lock don't know lock_type " << lock_type << dendl;
+ ceph_abort();
+ break;
+ }
+
+ return 0;
+}
+
+/* This function DOES put the passed message before returning */
+void Locker::handle_lock(MLock *m)
+{
+ // nobody should be talking to us during recovery.
+ assert(mds->is_rejoin() || mds->is_clientreplay() || mds->is_active() || mds->is_stopping());
+
+ SimpleLock *lock = get_lock(m->get_lock_type(), m->get_object_info());
+ if (!lock) {
+ dout(10) << "don't have object " << m->get_object_info() << ", must have trimmed, dropping" << dendl;
+ m->put();
+ return;
+ }
+
+ switch (lock->get_type()) {
+ case CEPH_LOCK_DN:
+ case CEPH_LOCK_IAUTH:
+ case CEPH_LOCK_ILINK:
+ case CEPH_LOCK_ISNAP:
+ case CEPH_LOCK_IXATTR:
+ case CEPH_LOCK_IFLOCK:
+ case CEPH_LOCK_IPOLICY:
+ handle_simple_lock(lock, m);
+ break;
+
+ case CEPH_LOCK_IDFT:
+ case CEPH_LOCK_INEST:
+ //handle_scatter_lock((ScatterLock*)lock, m);
+ //break;
+
+ case CEPH_LOCK_IFILE:
+ handle_file_lock(static_cast<ScatterLock*>(lock), m);
+ break;
+
+ default:
+ dout(7) << "handle_lock got otype " << m->get_lock_type() << dendl;
+ ceph_abort();
+ break;
+ }
+}
+
+
+
+
+
+// ==========================================================================
+// simple lock
+
+/** This function may take a reference to m if it needs one, but does
+ * not put references. */
+void Locker::handle_reqrdlock(SimpleLock *lock, MLock *m)
+{
+ MDSCacheObject *parent = lock->get_parent();
+ if (parent->is_auth() &&
+ lock->get_state() != LOCK_SYNC &&
+ !parent->is_frozen()) {
+ dout(7) << "handle_reqrdlock got rdlock request on " << *lock
+ << " on " << *parent << dendl;
+ assert(parent->is_auth()); // replica auth pinned if they're doing this!
+ if (lock->is_stable()) {
+ simple_sync(lock);
+ } else {
+ dout(7) << "handle_reqrdlock delaying request until lock is stable" << dendl;
+ lock->add_waiter(SimpleLock::WAIT_STABLE | MDSCacheObject::WAIT_UNFREEZE,
+ new C_MDS_RetryMessage(mds, m->get()));
+ }
+ } else {
+ dout(7) << "handle_reqrdlock dropping rdlock request on " << *lock
+ << " on " << *parent << dendl;
+ // replica should retry
+ }
+}
+
+/* This function DOES put the passed message before returning */
+void Locker::handle_simple_lock(SimpleLock *lock, MLock *m)
+{
+ int from = m->get_asker();
+
+ dout(10) << "handle_simple_lock " << *m
+ << " on " << *lock << " " << *lock->get_parent() << dendl;
+
+ if (mds->is_rejoin()) {
+ if (lock->get_parent()->is_rejoining()) {
+ dout(7) << "handle_simple_lock still rejoining " << *lock->get_parent()
+ << ", dropping " << *m << dendl;
+ m->put();
+ return;
+ }
+ }
+
+ switch (m->get_action()) {
+ // -- replica --
+ case LOCK_AC_SYNC:
+ assert(lock->get_state() == LOCK_LOCK);
+ lock->decode_locked_state(m->get_data());
+ lock->set_state(LOCK_SYNC);
+ lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE);
+ break;
+
+ case LOCK_AC_LOCK:
+ assert(lock->get_state() == LOCK_SYNC);
+ lock->set_state(LOCK_SYNC_LOCK);
+ if (lock->is_leased())
+ revoke_client_leases(lock);
+ eval_gather(lock, true);
+ if (lock->is_unstable_and_locked())
+ mds->mdlog->flush();
+ break;
+
+
+ // -- auth --
+ case LOCK_AC_LOCKACK:
+ assert(lock->get_state() == LOCK_SYNC_LOCK ||
+ lock->get_state() == LOCK_SYNC_EXCL);
+ assert(lock->is_gathering(from));
+ lock->remove_gather(from);
+
+ if (lock->is_gathering()) {
+ dout(7) << "handle_simple_lock " << *lock << " on " << *lock->get_parent() << " from " << from
+ << ", still gathering " << lock->get_gather_set() << dendl;
+ } else {
+ dout(7) << "handle_simple_lock " << *lock << " on " << *lock->get_parent() << " from " << from
+ << ", last one" << dendl;
+ eval_gather(lock);
+ }
+ break;
+
+ case LOCK_AC_REQRDLOCK:
+ handle_reqrdlock(lock, m);
+ break;
+
+ }
+
+ m->put();
+}
+
+/* unused, currently.
+
+class C_Locker_SimpleEval : public Context {
+ Locker *locker;
+ SimpleLock *lock;
+public:
+ C_Locker_SimpleEval(Locker *l, SimpleLock *lk) : locker(l), lock(lk) {}
+ void finish(int r) {
+ locker->try_simple_eval(lock);
+ }
+};
+
+void Locker::try_simple_eval(SimpleLock *lock)
+{
+ // unstable and ambiguous auth?
+ if (!lock->is_stable() &&
+ lock->get_parent()->is_ambiguous_auth()) {
+ dout(7) << "simple_eval not stable and ambiguous auth, waiting on " << *lock->get_parent() << dendl;
+ //if (!lock->get_parent()->is_waiter(MDSCacheObject::WAIT_SINGLEAUTH))
+ lock->get_parent()->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_Locker_SimpleEval(this, lock));
+ return;
+ }
+
+ if (!lock->get_parent()->is_auth()) {
+ dout(7) << "try_simple_eval not auth for " << *lock->get_parent() << dendl;
+ return;
+ }
+
+ if (!lock->get_parent()->can_auth_pin()) {
+ dout(7) << "try_simple_eval can't auth_pin, waiting on " << *lock->get_parent() << dendl;
+ //if (!lock->get_parent()->is_waiter(MDSCacheObject::WAIT_SINGLEAUTH))
+ lock->get_parent()->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_SimpleEval(this, lock));
+ return;
+ }
+
+ if (lock->is_stable())
+ simple_eval(lock);
+}
+*/
+
+
+void Locker::simple_eval(SimpleLock *lock, bool *need_issue)
+{
+ dout(10) << "simple_eval " << *lock << " on " << *lock->get_parent() << dendl;
+
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+
+ if (lock->get_parent()->is_freezing_or_frozen()) {
+ // dentry lock in unreadable state can block path traverse
+ if ((lock->get_type() != CEPH_LOCK_DN ||
+ lock->get_state() == LOCK_SYNC ||
+ lock->get_parent()->is_frozen()))
+ return;
+ }
+
+ if (mdcache->is_readonly()) {
+ if (lock->get_state() != LOCK_SYNC) {
+ dout(10) << "simple_eval read-only FS, syncing " << *lock << " on " << *lock->get_parent() << dendl;
+ simple_sync(lock, need_issue);
+ }
+ return;
+ }
+
+ CInode *in = 0;
+ int wanted = 0;
+ if (lock->get_type() != CEPH_LOCK_DN) {
+ in = static_cast<CInode*>(lock->get_parent());
+ in->get_caps_wanted(&wanted, NULL, lock->get_cap_shift());
+ }
+
+ // -> excl?
+ if (lock->get_state() != LOCK_EXCL &&
+ in && in->get_target_loner() >= 0 &&
+ (wanted & CEPH_CAP_GEXCL)) {
+ dout(7) << "simple_eval stable, going to excl " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ simple_excl(lock, need_issue);
+ }
+
+ // stable -> sync?
+ else if (lock->get_state() != LOCK_SYNC &&
+ !lock->is_wrlocked() &&
+ ((!(wanted & CEPH_CAP_GEXCL) && !lock->is_waiter_for(SimpleLock::WAIT_WR)) ||
+ (lock->get_state() == LOCK_EXCL && in && in->get_target_loner() < 0))) {
+ dout(7) << "simple_eval stable, syncing " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ simple_sync(lock, need_issue);
+ }
+}
+
+
+// mid
+
+bool Locker::simple_sync(SimpleLock *lock, bool *need_issue)
+{
+ dout(7) << "simple_sync on " << *lock << " on " << *lock->get_parent() << dendl;
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+
+ CInode *in = 0;
+ if (lock->get_cap_shift())
+ in = static_cast<CInode *>(lock->get_parent());
+
+ int old_state = lock->get_state();
+
+ if (old_state != LOCK_TSYN) {
+
+ switch (lock->get_state()) {
+ case LOCK_MIX: lock->set_state(LOCK_MIX_SYNC); break;
+ case LOCK_LOCK: lock->set_state(LOCK_LOCK_SYNC); break;
+ case LOCK_XSYN: lock->set_state(LOCK_XSYN_SYNC); break;
+ case LOCK_EXCL: lock->set_state(LOCK_EXCL_SYNC); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_wrlocked())
+ gather++;
+
+ if (lock->get_parent()->is_replicated() && old_state == LOCK_MIX) {
+ send_lock_message(lock, LOCK_AC_SYNC);
+ lock->init_gather();
+ gather++;
+ }
+
+ if (in && in->is_head()) {
+ if (in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+ }
+
+ bool need_recover = false;
+ if (lock->get_type() == CEPH_LOCK_IFILE) {
+ assert(in);
+ if (in->state_test(CInode::STATE_NEEDSRECOVER)) {
+ mds->mdcache->queue_file_recover(in);
+ need_recover = true;
+ gather++;
+ }
+ }
+
+ if (!gather && lock->is_dirty()) {
+ lock->get_parent()->auth_pin(lock);
+ scatter_writebehind(static_cast<ScatterLock*>(lock));
+ mds->mdlog->flush();
+ return false;
+ }
+
+ if (gather) {
+ lock->get_parent()->auth_pin(lock);
+ if (need_recover)
+ mds->mdcache->do_file_recover();
+ return false;
+ }
+ }
+
+ if (lock->get_parent()->is_replicated()) { // FIXME
+ bufferlist data;
+ lock->encode_locked_state(data);
+ send_lock_message(lock, LOCK_AC_SYNC, data);
+ }
+ lock->set_state(LOCK_SYNC);
+ lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE);
+ if (in && in->is_head()) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+ return true;
+}
+
+void Locker::simple_excl(SimpleLock *lock, bool *need_issue)
+{
+ dout(7) << "simple_excl on " << *lock << " on " << *lock->get_parent() << dendl;
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+
+ CInode *in = 0;
+ if (lock->get_cap_shift())
+ in = static_cast<CInode *>(lock->get_parent());
+
+ switch (lock->get_state()) {
+ case LOCK_LOCK: lock->set_state(LOCK_LOCK_EXCL); break;
+ case LOCK_SYNC: lock->set_state(LOCK_SYNC_EXCL); break;
+ case LOCK_XSYN: lock->set_state(LOCK_XSYN_EXCL); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_rdlocked())
+ gather++;
+ if (lock->is_wrlocked())
+ gather++;
+
+ if (lock->get_parent()->is_replicated() &&
+ lock->get_state() != LOCK_LOCK_EXCL &&
+ lock->get_state() != LOCK_XSYN_EXCL) {
+ send_lock_message(lock, LOCK_AC_LOCK);
+ lock->init_gather();
+ gather++;
+ }
+
+ if (in && in->is_head()) {
+ if (in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+ }
+
+ if (gather) {
+ lock->get_parent()->auth_pin(lock);
+ } else {
+ lock->set_state(LOCK_EXCL);
+ lock->finish_waiters(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE);
+ if (in) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+ }
+}
+
+void Locker::simple_lock(SimpleLock *lock, bool *need_issue)
+{
+ dout(7) << "simple_lock on " << *lock << " on " << *lock->get_parent() << dendl;
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+ assert(lock->get_state() != LOCK_LOCK);
+
+ CInode *in = 0;
+ if (lock->get_cap_shift())
+ in = static_cast<CInode *>(lock->get_parent());
+
+ int old_state = lock->get_state();
+
+ switch (lock->get_state()) {
+ case LOCK_SYNC: lock->set_state(LOCK_SYNC_LOCK); break;
+ case LOCK_XSYN:
+ file_excl(static_cast<ScatterLock*>(lock), need_issue);
+ if (lock->get_state() != LOCK_EXCL)
+ return;
+ // fall-thru
+ case LOCK_EXCL: lock->set_state(LOCK_EXCL_LOCK); break;
+ case LOCK_MIX: lock->set_state(LOCK_MIX_LOCK);
+ (static_cast<ScatterLock *>(lock))->clear_unscatter_wanted();
+ break;
+ case LOCK_TSYN: lock->set_state(LOCK_TSYN_LOCK); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_leased()) {
+ gather++;
+ revoke_client_leases(lock);
+ }
+ if (lock->is_rdlocked())
+ gather++;
+ if (in && in->is_head()) {
+ if (in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+ }
+
+ bool need_recover = false;
+ if (lock->get_type() == CEPH_LOCK_IFILE) {
+ assert(in);
+ if(in->state_test(CInode::STATE_NEEDSRECOVER)) {
+ mds->mdcache->queue_file_recover(in);
+ need_recover = true;
+ gather++;
+ }
+ }
+
+ if (lock->get_parent()->is_replicated() &&
+ lock->get_state() == LOCK_MIX_LOCK &&
+ gather) {
+ dout(10) << " doing local stage of mix->lock gather before gathering from replicas" << dendl;
+ } else {
+ // move to second stage of gather now, so we don't send the lock action later.
+ if (lock->get_state() == LOCK_MIX_LOCK)
+ lock->set_state(LOCK_MIX_LOCK2);
+
+ if (lock->get_parent()->is_replicated() &&
+ lock->get_sm()->states[old_state].replica_state != LOCK_LOCK) { // replica may already be LOCK
+ gather++;
+ send_lock_message(lock, LOCK_AC_LOCK);
+ lock->init_gather();
+ }
+ }
+
+ if (!gather && lock->is_dirty()) {
+ lock->get_parent()->auth_pin(lock);
+ scatter_writebehind(static_cast<ScatterLock*>(lock));
+ mds->mdlog->flush();
+ return;
+ }
+
+ if (gather) {
+ lock->get_parent()->auth_pin(lock);
+ if (need_recover)
+ mds->mdcache->do_file_recover();
+ } else {
+ lock->set_state(LOCK_LOCK);
+ lock->finish_waiters(ScatterLock::WAIT_XLOCK|ScatterLock::WAIT_WR|ScatterLock::WAIT_STABLE);
+ }
+}
+
+
+void Locker::simple_xlock(SimpleLock *lock)
+{
+ dout(7) << "simple_xlock on " << *lock << " on " << *lock->get_parent() << dendl;
+ assert(lock->get_parent()->is_auth());
+ //assert(lock->is_stable());
+ assert(lock->get_state() != LOCK_XLOCK);
+
+ CInode *in = 0;
+ if (lock->get_cap_shift())
+ in = static_cast<CInode *>(lock->get_parent());
+
+ if (lock->is_stable())
+ lock->get_parent()->auth_pin(lock);
+
+ switch (lock->get_state()) {
+ case LOCK_LOCK:
+ case LOCK_XLOCKDONE: lock->set_state(LOCK_LOCK_XLOCK); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_rdlocked())
+ gather++;
+ if (lock->is_wrlocked())
+ gather++;
+
+ if (in && in->is_head()) {
+ if (in->issued_caps_need_gather(lock)) {
+ issue_caps(in);
+ gather++;
+ }
+ }
+
+ if (!gather) {
+ lock->set_state(LOCK_PREXLOCK);
+ //assert("shouldn't be called if we are already xlockable" == 0);
+ }
+}
+
+
+
+
+
+// ==========================================================================
+// scatter lock
+
+/*
+
+Some notes on scatterlocks.
+
+ - The scatter/gather is driven by the inode lock. The scatter always
+ brings in the latest metadata from the fragments.
+
+ - When in a scattered/MIX state, fragments are only allowed to
+ update/be written to if the accounted stat matches the inode's
+ current version.
+
+ - That means, on gather, we _only_ assimilate diffs for frag metadata
+ that match the current version, because those are the only ones
+ written during this scatter/gather cycle. (Others didn't permit
+ it.) We increment the version and journal this to disk.
+
+ - When possible, we also simultaneously update our local frag
+ accounted stats to match.
+
+ - On scatter, the new inode info is broadcast to frags, both local
+ and remote. If possible (auth and !frozen), the dirfrag auth
+ should update the accounted state (if it isn't already up to date).
+ Note that this may occur on both the local inode auth node and
+ inode replicas, so there are two potential paths. If it is NOT
+ possible, they need to mark_stale to prevent any possible writes.
+
+ - A scatter can be to MIX (potentially writeable) or to SYNC (read
+ only). Both are opportunities to update the frag accounted stats,
+ even though only the MIX case is affected by a stale dirfrag.
+
+ - Because many scatter/gather cycles can potentially go by without a
+ frag being able to update its accounted stats (due to being frozen
+ by exports/refragments in progress), the frag may have (even very)
+ old stat versions. That's fine. If when we do want to update it,
+ we can update accounted_* and the version first.
+
+*/
+
+class C_Locker_ScatterWB : public LockerLogContext {
+ ScatterLock *lock;
+ MutationRef mut;
+public:
+ C_Locker_ScatterWB(Locker *l, ScatterLock *sl, MutationRef& m) :
+ LockerLogContext(l), lock(sl), mut(m) {}
+ void finish(int r) override {
+ locker->scatter_writebehind_finish(lock, mut);
+ }
+};
+
+void Locker::scatter_writebehind(ScatterLock *lock)
+{
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ dout(10) << "scatter_writebehind " << in->inode.mtime << " on " << *lock << " on " << *in << dendl;
+
+ // journal
+ MutationRef mut(new MutationImpl());
+ mut->ls = mds->mdlog->get_current_segment();
+
+ // forcefully take a wrlock
+ lock->get_wrlock(true);
+ mut->wrlocks.insert(lock);
+ mut->locks.insert(lock);
+
+ in->pre_cow_old_inode(); // avoid cow mayhem
+
+ inode_t *pi = in->project_inode();
+ pi->version = in->pre_dirty();
+
+ in->finish_scatter_gather_update(lock->get_type());
+ lock->start_flush();
+
+ EUpdate *le = new EUpdate(mds->mdlog, "scatter_writebehind");
+ mds->mdlog->start_entry(le);
+
+ mdcache->predirty_journal_parents(mut, &le->metablob, in, 0, PREDIRTY_PRIMARY);
+ mdcache->journal_dirty_inode(mut.get(), &le->metablob, in);
+
+ in->finish_scatter_gather_update_accounted(lock->get_type(), mut, &le->metablob);
+
+ mds->mdlog->submit_entry(le, new C_Locker_ScatterWB(this, lock, mut));
+}
+
+void Locker::scatter_writebehind_finish(ScatterLock *lock, MutationRef& mut)
+{
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ dout(10) << "scatter_writebehind_finish on " << *lock << " on " << *in << dendl;
+ in->pop_and_dirty_projected_inode(mut->ls);
+
+ lock->finish_flush();
+
+ // if replicas may have flushed in a mix->lock state, send another
+ // message so they can finish_flush().
+ if (in->is_replicated()) {
+ switch (lock->get_state()) {
+ case LOCK_MIX_LOCK:
+ case LOCK_MIX_LOCK2:
+ case LOCK_MIX_EXCL:
+ case LOCK_MIX_TSYN:
+ send_lock_message(lock, LOCK_AC_LOCKFLUSHED);
+ }
+ }
+
+ mut->apply();
+ drop_locks(mut.get());
+ mut->cleanup();
+
+ if (lock->is_stable())
+ lock->finish_waiters(ScatterLock::WAIT_STABLE);
+
+ //scatter_eval_gather(lock);
+}
+
+void Locker::scatter_eval(ScatterLock *lock, bool *need_issue)
+{
+ dout(10) << "scatter_eval " << *lock << " on " << *lock->get_parent() << dendl;
+
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+
+ if (lock->get_parent()->is_freezing_or_frozen()) {
+ dout(20) << " freezing|frozen" << dendl;
+ return;
+ }
+
+ if (mdcache->is_readonly()) {
+ if (lock->get_state() != LOCK_SYNC) {
+ dout(10) << "scatter_eval read-only FS, syncing " << *lock << " on " << *lock->get_parent() << dendl;
+ simple_sync(lock, need_issue);
+ }
+ return;
+ }
+
+ if (!lock->is_rdlocked() &&
+ lock->get_state() != LOCK_MIX &&
+ lock->get_scatter_wanted()) {
+ dout(10) << "scatter_eval scatter_wanted, bump to mix " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ scatter_mix(lock, need_issue);
+ return;
+ }
+
+ if (lock->get_type() == CEPH_LOCK_INEST) {
+ // in general, we want to keep INEST writable at all times.
+ if (!lock->is_rdlocked()) {
+ if (lock->get_parent()->is_replicated()) {
+ if (lock->get_state() != LOCK_MIX)
+ scatter_mix(lock, need_issue);
+ } else {
+ if (lock->get_state() != LOCK_LOCK)
+ simple_lock(lock, need_issue);
+ }
+ }
+ return;
+ }
+
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ if (!in->has_subtree_or_exporting_dirfrag() || in->is_base()) {
+ // i _should_ be sync.
+ if (!lock->is_wrlocked() &&
+ lock->get_state() != LOCK_SYNC) {
+ dout(10) << "scatter_eval no wrlocks|xlocks, not subtree root inode, syncing" << dendl;
+ simple_sync(lock, need_issue);
+ }
+ }
+}
+
+
+/*
+ * mark a scatterlock to indicate that the dir fnode has some dirty data
+ */
+void Locker::mark_updated_scatterlock(ScatterLock *lock)
+{
+ lock->mark_dirty();
+ if (lock->get_updated_item()->is_on_list()) {
+ dout(10) << "mark_updated_scatterlock " << *lock
+ << " - already on list since " << lock->get_update_stamp() << dendl;
+ } else {
+ updated_scatterlocks.push_back(lock->get_updated_item());
+ utime_t now = ceph_clock_now();
+ lock->set_update_stamp(now);
+ dout(10) << "mark_updated_scatterlock " << *lock
+ << " - added at " << now << dendl;
+ }
+}
+
+/*
+ * this is called by scatter_tick and LogSegment::try_to_trim() when
+ * trying to flush dirty scattered data (i.e. updated fnode) back to
+ * the inode.
+ *
+ * we need to lock|scatter in order to push fnode changes into the
+ * inode.dirstat.
+ */
+void Locker::scatter_nudge(ScatterLock *lock, MDSInternalContextBase *c, bool forcelockchange)
+{
+ CInode *p = static_cast<CInode *>(lock->get_parent());
+
+ if (p->is_frozen() || p->is_freezing()) {
+ dout(10) << "scatter_nudge waiting for unfreeze on " << *p << dendl;
+ if (c)
+ p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, c);
+ else
+ // just requeue. not ideal.. starvation prone..
+ updated_scatterlocks.push_back(lock->get_updated_item());
+ return;
+ }
+
+ if (p->is_ambiguous_auth()) {
+ dout(10) << "scatter_nudge waiting for single auth on " << *p << dendl;
+ if (c)
+ p->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, c);
+ else
+ // just requeue. not ideal.. starvation prone..
+ updated_scatterlocks.push_back(lock->get_updated_item());
+ return;
+ }
+
+ if (p->is_auth()) {
+ int count = 0;
+ while (true) {
+ if (lock->is_stable()) {
+ // can we do it now?
+ // (only if we're not replicated.. if we are, we really do need
+ // to nudge the lock state!)
+ /*
+ actually, even if we're not replicated, we can't stay in MIX, because another mds
+ could discover and replicate us at any time. if that happens while we're flushing,
+ they end up in MIX but their inode has the old scatterstat version.
+
+ if (!forcelockchange && !lock->get_parent()->is_replicated() && lock->can_wrlock(-1)) {
+ dout(10) << "scatter_nudge auth, propagating " << *lock << " on " << *p << dendl;
+ scatter_writebehind(lock);
+ if (c)
+ lock->add_waiter(SimpleLock::WAIT_STABLE, c);
+ return;
+ }
+ */
+
+ if (mdcache->is_readonly()) {
+ if (lock->get_state() != LOCK_SYNC) {
+ dout(10) << "scatter_nudge auth, read-only FS, syncing " << *lock << " on " << *p << dendl;
+ simple_sync(static_cast<ScatterLock*>(lock));
+ }
+ break;
+ }
+
+ // adjust lock state
+ dout(10) << "scatter_nudge auth, scatter/unscattering " << *lock << " on " << *p << dendl;
+ switch (lock->get_type()) {
+ case CEPH_LOCK_IFILE:
+ if (p->is_replicated() && lock->get_state() != LOCK_MIX)
+ scatter_mix(static_cast<ScatterLock*>(lock));
+ else if (lock->get_state() != LOCK_LOCK)
+ simple_lock(static_cast<ScatterLock*>(lock));
+ else
+ simple_sync(static_cast<ScatterLock*>(lock));
+ break;
+
+ case CEPH_LOCK_IDFT:
+ case CEPH_LOCK_INEST:
+ if (p->is_replicated() && lock->get_state() != LOCK_MIX)
+ scatter_mix(lock);
+ else if (lock->get_state() != LOCK_LOCK)
+ simple_lock(lock);
+ else
+ simple_sync(lock);
+ break;
+ default:
+ ceph_abort();
+ }
+ ++count;
+ if (lock->is_stable() && count == 2) {
+ dout(10) << "scatter_nudge oh, stable after two cycles." << dendl;
+ // this should only realy happen when called via
+ // handle_file_lock due to AC_NUDGE, because the rest of the
+ // time we are replicated or have dirty data and won't get
+ // called. bailing here avoids an infinite loop.
+ assert(!c);
+ break;
+ }
+ } else {
+ dout(10) << "scatter_nudge auth, waiting for stable " << *lock << " on " << *p << dendl;
+ if (c)
+ lock->add_waiter(SimpleLock::WAIT_STABLE, c);
+ return;
+ }
+ }
+ } else {
+ dout(10) << "scatter_nudge replica, requesting scatter/unscatter of "
+ << *lock << " on " << *p << dendl;
+ // request unscatter?
+ mds_rank_t auth = lock->get_parent()->authority().first;
+ if (!mds->is_cluster_degraded() ||
+ mds->mdsmap->is_clientreplay_or_active_or_stopping(auth))
+ mds->send_message_mds(new MLock(lock, LOCK_AC_NUDGE, mds->get_nodeid()), auth);
+
+ // wait...
+ if (c)
+ lock->add_waiter(SimpleLock::WAIT_STABLE, c);
+
+ // also, requeue, in case we had wrong auth or something
+ updated_scatterlocks.push_back(lock->get_updated_item());
+ }
+}
+
+void Locker::scatter_tick()
+{
+ dout(10) << "scatter_tick" << dendl;
+
+ // updated
+ utime_t now = ceph_clock_now();
+ int n = updated_scatterlocks.size();
+ while (!updated_scatterlocks.empty()) {
+ ScatterLock *lock = updated_scatterlocks.front();
+
+ if (n-- == 0) break; // scatter_nudge() may requeue; avoid looping
+
+ if (!lock->is_dirty()) {
+ updated_scatterlocks.pop_front();
+ dout(10) << " removing from updated_scatterlocks "
+ << *lock << " " << *lock->get_parent() << dendl;
+ continue;
+ }
+ if (now - lock->get_update_stamp() < g_conf->mds_scatter_nudge_interval)
+ break;
+ updated_scatterlocks.pop_front();
+ scatter_nudge(lock, 0);
+ }
+ mds->mdlog->flush();
+}
+
+
+void Locker::scatter_tempsync(ScatterLock *lock, bool *need_issue)
+{
+ dout(10) << "scatter_tempsync " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+
+ assert(0 == "not fully implemented, at least not for filelock");
+
+ CInode *in = static_cast<CInode *>(lock->get_parent());
+
+ switch (lock->get_state()) {
+ case LOCK_SYNC: ceph_abort(); // this shouldn't happen
+ case LOCK_LOCK: lock->set_state(LOCK_LOCK_TSYN); break;
+ case LOCK_MIX: lock->set_state(LOCK_MIX_TSYN); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_wrlocked())
+ gather++;
+
+ if (lock->get_cap_shift() &&
+ in->is_head() &&
+ in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+
+ if (lock->get_state() == LOCK_MIX_TSYN &&
+ in->is_replicated()) {
+ lock->init_gather();
+ send_lock_message(lock, LOCK_AC_LOCK);
+ gather++;
+ }
+
+ if (gather) {
+ in->auth_pin(lock);
+ } else {
+ // do tempsync
+ lock->set_state(LOCK_TSYN);
+ lock->finish_waiters(ScatterLock::WAIT_RD|ScatterLock::WAIT_STABLE);
+ if (lock->get_cap_shift()) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+ }
+}
+
+
+
+// ==========================================================================
+// local lock
+
+void Locker::local_wrlock_grab(LocalLock *lock, MutationRef& mut)
+{
+ dout(7) << "local_wrlock_grab on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+
+ assert(lock->get_parent()->is_auth());
+ assert(lock->can_wrlock());
+ assert(!mut->wrlocks.count(lock));
+ lock->get_wrlock(mut->get_client());
+ mut->wrlocks.insert(lock);
+ mut->locks.insert(lock);
+}
+
+bool Locker::local_wrlock_start(LocalLock *lock, MDRequestRef& mut)
+{
+ dout(7) << "local_wrlock_start on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+
+ assert(lock->get_parent()->is_auth());
+ if (lock->can_wrlock()) {
+ assert(!mut->wrlocks.count(lock));
+ lock->get_wrlock(mut->get_client());
+ mut->wrlocks.insert(lock);
+ mut->locks.insert(lock);
+ return true;
+ } else {
+ lock->add_waiter(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut));
+ return false;
+ }
+}
+
+void Locker::local_wrlock_finish(LocalLock *lock, MutationImpl *mut)
+{
+ dout(7) << "local_wrlock_finish on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ lock->put_wrlock();
+ mut->wrlocks.erase(lock);
+ mut->locks.erase(lock);
+ if (lock->get_num_wrlocks() == 0) {
+ lock->finish_waiters(SimpleLock::WAIT_STABLE |
+ SimpleLock::WAIT_WR |
+ SimpleLock::WAIT_RD);
+ }
+}
+
+bool Locker::local_xlock_start(LocalLock *lock, MDRequestRef& mut)
+{
+ dout(7) << "local_xlock_start on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+
+ assert(lock->get_parent()->is_auth());
+ if (!lock->can_xlock_local()) {
+ lock->add_waiter(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut));
+ return false;
+ }
+
+ lock->get_xlock(mut, mut->get_client());
+ mut->xlocks.insert(lock);
+ mut->locks.insert(lock);
+ return true;
+}
+
+void Locker::local_xlock_finish(LocalLock *lock, MutationImpl *mut)
+{
+ dout(7) << "local_xlock_finish on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ lock->put_xlock();
+ mut->xlocks.erase(lock);
+ mut->locks.erase(lock);
+
+ lock->finish_waiters(SimpleLock::WAIT_STABLE |
+ SimpleLock::WAIT_WR |
+ SimpleLock::WAIT_RD);
+}
+
+
+
+// ==========================================================================
+// file lock
+
+
+void Locker::file_eval(ScatterLock *lock, bool *need_issue)
+{
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ int loner_wanted, other_wanted;
+ int wanted = in->get_caps_wanted(&loner_wanted, &other_wanted, CEPH_CAP_SFILE);
+ dout(7) << "file_eval wanted=" << gcap_string(wanted)
+ << " loner_wanted=" << gcap_string(loner_wanted)
+ << " other_wanted=" << gcap_string(other_wanted)
+ << " filelock=" << *lock << " on " << *lock->get_parent()
+ << dendl;
+
+ assert(lock->get_parent()->is_auth());
+ assert(lock->is_stable());
+
+ if (lock->get_parent()->is_freezing_or_frozen())
+ return;
+
+ if (mdcache->is_readonly()) {
+ if (lock->get_state() != LOCK_SYNC) {
+ dout(10) << "file_eval read-only FS, syncing " << *lock << " on " << *lock->get_parent() << dendl;
+ simple_sync(lock, need_issue);
+ }
+ return;
+ }
+
+ // excl -> *?
+ if (lock->get_state() == LOCK_EXCL) {
+ dout(20) << " is excl" << dendl;
+ int loner_issued, other_issued, xlocker_issued;
+ in->get_caps_issued(&loner_issued, &other_issued, &xlocker_issued, CEPH_CAP_SFILE);
+ dout(7) << "file_eval loner_issued=" << gcap_string(loner_issued)
+ << " other_issued=" << gcap_string(other_issued)
+ << " xlocker_issued=" << gcap_string(xlocker_issued)
+ << dendl;
+ if (!((loner_wanted|loner_issued) & (CEPH_CAP_GEXCL|CEPH_CAP_GWR|CEPH_CAP_GBUFFER)) ||
+ (other_wanted & (CEPH_CAP_GEXCL|CEPH_CAP_GWR|CEPH_CAP_GRD)) ||
+ (in->inode.is_dir() && in->multiple_nonstale_caps())) { // FIXME.. :/
+ dout(20) << " should lose it" << dendl;
+ // we should lose it.
+ // loner other want
+ // R R SYNC
+ // R R|W MIX
+ // R W MIX
+ // R|W R MIX
+ // R|W R|W MIX
+ // R|W W MIX
+ // W R MIX
+ // W R|W MIX
+ // W W MIX
+ // -> any writer means MIX; RD doesn't matter.
+ if (((other_wanted|loner_wanted) & CEPH_CAP_GWR) ||
+ lock->is_waiter_for(SimpleLock::WAIT_WR))
+ scatter_mix(lock, need_issue);
+ else if (!lock->is_wrlocked()) // let excl wrlocks drain first
+ simple_sync(lock, need_issue);
+ else
+ dout(10) << " waiting for wrlock to drain" << dendl;
+ }
+ }
+
+ // * -> excl?
+ else if (lock->get_state() != LOCK_EXCL &&
+ !lock->is_rdlocked() &&
+ //!lock->is_waiter_for(SimpleLock::WAIT_WR) &&
+ ((wanted & (CEPH_CAP_GWR|CEPH_CAP_GBUFFER)) ||
+ (in->inode.is_dir() && !in->has_subtree_or_exporting_dirfrag())) &&
+ in->get_target_loner() >= 0) {
+ dout(7) << "file_eval stable, bump to loner " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ file_excl(lock, need_issue);
+ }
+
+ // * -> mixed?
+ else if (lock->get_state() != LOCK_MIX &&
+ !lock->is_rdlocked() &&
+ //!lock->is_waiter_for(SimpleLock::WAIT_WR) &&
+ (lock->get_scatter_wanted() ||
+ (in->get_wanted_loner() < 0 && (wanted & CEPH_CAP_GWR)))) {
+ dout(7) << "file_eval stable, bump to mixed " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ scatter_mix(lock, need_issue);
+ }
+
+ // * -> sync?
+ else if (lock->get_state() != LOCK_SYNC &&
+ !lock->is_wrlocked() && // drain wrlocks first!
+ !lock->is_waiter_for(SimpleLock::WAIT_WR) &&
+ !(wanted & (CEPH_CAP_GWR|CEPH_CAP_GBUFFER)) &&
+ !((lock->get_state() == LOCK_MIX) &&
+ in->is_dir() && in->has_subtree_or_exporting_dirfrag()) // if we are a delegation point, stay where we are
+ //((wanted & CEPH_CAP_RD) ||
+ //in->is_replicated() ||
+ //lock->get_num_client_lease() ||
+ //(!loner && lock->get_state() == LOCK_EXCL)) &&
+ ) {
+ dout(7) << "file_eval stable, bump to sync " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ simple_sync(lock, need_issue);
+ }
+}
+
+
+
+void Locker::scatter_mix(ScatterLock *lock, bool *need_issue)
+{
+ dout(7) << "scatter_mix " << *lock << " on " << *lock->get_parent() << dendl;
+
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ assert(in->is_auth());
+ assert(lock->is_stable());
+
+ if (lock->get_state() == LOCK_LOCK) {
+ in->start_scatter(lock);
+ if (in->is_replicated()) {
+ // data
+ bufferlist softdata;
+ lock->encode_locked_state(softdata);
+
+ // bcast to replicas
+ send_lock_message(lock, LOCK_AC_MIX, softdata);
+ }
+
+ // change lock
+ lock->set_state(LOCK_MIX);
+ lock->clear_scatter_wanted();
+ if (lock->get_cap_shift()) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+ } else {
+ // gather?
+ switch (lock->get_state()) {
+ case LOCK_SYNC: lock->set_state(LOCK_SYNC_MIX); break;
+ case LOCK_XSYN:
+ file_excl(lock, need_issue);
+ if (lock->get_state() != LOCK_EXCL)
+ return;
+ // fall-thru
+ case LOCK_EXCL: lock->set_state(LOCK_EXCL_MIX); break;
+ case LOCK_TSYN: lock->set_state(LOCK_TSYN_MIX); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_rdlocked())
+ gather++;
+ if (in->is_replicated()) {
+ if (lock->get_state() != LOCK_EXCL_MIX && // EXCL replica is already LOCK
+ lock->get_state() != LOCK_XSYN_EXCL) { // XSYN replica is already LOCK; ** FIXME here too!
+ send_lock_message(lock, LOCK_AC_MIX);
+ lock->init_gather();
+ gather++;
+ }
+ }
+ if (lock->is_leased()) {
+ revoke_client_leases(lock);
+ gather++;
+ }
+ if (lock->get_cap_shift() &&
+ in->is_head() &&
+ in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+ bool need_recover = false;
+ if (in->state_test(CInode::STATE_NEEDSRECOVER)) {
+ mds->mdcache->queue_file_recover(in);
+ need_recover = true;
+ gather++;
+ }
+
+ if (gather) {
+ lock->get_parent()->auth_pin(lock);
+ if (need_recover)
+ mds->mdcache->do_file_recover();
+ } else {
+ in->start_scatter(lock);
+ lock->set_state(LOCK_MIX);
+ lock->clear_scatter_wanted();
+ if (in->is_replicated()) {
+ bufferlist softdata;
+ lock->encode_locked_state(softdata);
+ send_lock_message(lock, LOCK_AC_MIX, softdata);
+ }
+ if (lock->get_cap_shift()) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+ }
+ }
+}
+
+
+void Locker::file_excl(ScatterLock *lock, bool *need_issue)
+{
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ dout(7) << "file_excl " << *lock << " on " << *lock->get_parent() << dendl;
+
+ assert(in->is_auth());
+ assert(lock->is_stable());
+
+ assert((in->get_loner() >= 0 && in->mds_caps_wanted.empty()) ||
+ (lock->get_state() == LOCK_XSYN)); // must do xsyn -> excl -> <anything else>
+
+ switch (lock->get_state()) {
+ case LOCK_SYNC: lock->set_state(LOCK_SYNC_EXCL); break;
+ case LOCK_MIX: lock->set_state(LOCK_MIX_EXCL); break;
+ case LOCK_LOCK: lock->set_state(LOCK_LOCK_EXCL); break;
+ case LOCK_XSYN: lock->set_state(LOCK_XSYN_EXCL); break;
+ default: ceph_abort();
+ }
+ int gather = 0;
+
+ if (lock->is_rdlocked())
+ gather++;
+ if (lock->is_wrlocked())
+ gather++;
+
+ if (in->is_replicated() &&
+ lock->get_state() != LOCK_LOCK_EXCL &&
+ lock->get_state() != LOCK_XSYN_EXCL) { // if we were lock, replicas are already lock.
+ send_lock_message(lock, LOCK_AC_LOCK);
+ lock->init_gather();
+ gather++;
+ }
+ if (lock->is_leased()) {
+ revoke_client_leases(lock);
+ gather++;
+ }
+ if (in->is_head() &&
+ in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+ bool need_recover = false;
+ if (in->state_test(CInode::STATE_NEEDSRECOVER)) {
+ mds->mdcache->queue_file_recover(in);
+ need_recover = true;
+ gather++;
+ }
+
+ if (gather) {
+ lock->get_parent()->auth_pin(lock);
+ if (need_recover)
+ mds->mdcache->do_file_recover();
+ } else {
+ lock->set_state(LOCK_EXCL);
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+}
+
+void Locker::file_xsyn(SimpleLock *lock, bool *need_issue)
+{
+ dout(7) << "file_xsyn on " << *lock << " on " << *lock->get_parent() << dendl;
+ CInode *in = static_cast<CInode *>(lock->get_parent());
+ assert(in->is_auth());
+ assert(in->get_loner() >= 0 && in->mds_caps_wanted.empty());
+
+ switch (lock->get_state()) {
+ case LOCK_EXCL: lock->set_state(LOCK_EXCL_XSYN); break;
+ default: ceph_abort();
+ }
+
+ int gather = 0;
+ if (lock->is_wrlocked())
+ gather++;
+
+ if (in->is_head() &&
+ in->issued_caps_need_gather(lock)) {
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ gather++;
+ }
+
+ if (gather) {
+ lock->get_parent()->auth_pin(lock);
+ } else {
+ lock->set_state(LOCK_XSYN);
+ lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE);
+ if (need_issue)
+ *need_issue = true;
+ else
+ issue_caps(in);
+ }
+}
+
+void Locker::file_recover(ScatterLock *lock)
+{
+ CInode *in = static_cast<CInode *>(lock->get_parent());
+ dout(7) << "file_recover " << *lock << " on " << *in << dendl;
+
+ assert(in->is_auth());
+ //assert(lock->is_stable());
+ assert(lock->get_state() == LOCK_PRE_SCAN); // only called from MDCache::start_files_to_recover()
+
+ int gather = 0;
+
+ /*
+ if (in->is_replicated()
+ lock->get_sm()->states[oldstate].replica_state != LOCK_LOCK) {
+ send_lock_message(lock, LOCK_AC_LOCK);
+ lock->init_gather();
+ gather++;
+ }
+ */
+ if (in->is_head() &&
+ in->issued_caps_need_gather(lock)) {
+ issue_caps(in);
+ gather++;
+ }
+
+ lock->set_state(LOCK_SCAN);
+ if (gather)
+ in->state_set(CInode::STATE_NEEDSRECOVER);
+ else
+ mds->mdcache->queue_file_recover(in);
+}
+
+
+// messenger
+/* This function DOES put the passed message before returning */
+void Locker::handle_file_lock(ScatterLock *lock, MLock *m)
+{
+ CInode *in = static_cast<CInode*>(lock->get_parent());
+ int from = m->get_asker();
+
+ if (mds->is_rejoin()) {
+ if (in->is_rejoining()) {
+ dout(7) << "handle_file_lock still rejoining " << *in
+ << ", dropping " << *m << dendl;
+ m->put();
+ return;
+ }
+ }
+
+ dout(7) << "handle_file_lock a=" << get_lock_action_name(m->get_action())
+ << " on " << *lock
+ << " from mds." << from << " "
+ << *in << dendl;
+
+ bool caps = lock->get_cap_shift();
+
+ switch (m->get_action()) {
+ // -- replica --
+ case LOCK_AC_SYNC:
+ assert(lock->get_state() == LOCK_LOCK ||
+ lock->get_state() == LOCK_MIX ||
+ lock->get_state() == LOCK_MIX_SYNC2);
+
+ if (lock->get_state() == LOCK_MIX) {
+ lock->set_state(LOCK_MIX_SYNC);
+ eval_gather(lock, true);
+ if (lock->is_unstable_and_locked())
+ mds->mdlog->flush();
+ break;
+ }
+
+ (static_cast<ScatterLock *>(lock))->finish_flush();
+ (static_cast<ScatterLock *>(lock))->clear_flushed();
+
+ // ok
+ lock->decode_locked_state(m->get_data());
+ lock->set_state(LOCK_SYNC);
+
+ lock->get_rdlock();
+ if (caps)
+ issue_caps(in);
+ lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE);
+ lock->put_rdlock();
+ break;
+
+ case LOCK_AC_LOCK:
+ switch (lock->get_state()) {
+ case LOCK_SYNC: lock->set_state(LOCK_SYNC_LOCK); break;
+ case LOCK_MIX: lock->set_state(LOCK_MIX_LOCK); break;
+ default: ceph_abort();
+ }
+
+ eval_gather(lock, true);
+ if (lock->is_unstable_and_locked())
+ mds->mdlog->flush();
+
+ break;
+
+ case LOCK_AC_LOCKFLUSHED:
+ (static_cast<ScatterLock *>(lock))->finish_flush();
+ (static_cast<ScatterLock *>(lock))->clear_flushed();
+ // wake up scatter_nudge waiters
+ if (lock->is_stable())
+ lock->finish_waiters(SimpleLock::WAIT_STABLE);
+ break;
+
+ case LOCK_AC_MIX:
+ assert(lock->get_state() == LOCK_SYNC ||
+ lock->get_state() == LOCK_LOCK ||
+ lock->get_state() == LOCK_SYNC_MIX2);
+
+ if (lock->get_state() == LOCK_SYNC) {
+ // MIXED
+ lock->set_state(LOCK_SYNC_MIX);
+ eval_gather(lock, true);
+ if (lock->is_unstable_and_locked())
+ mds->mdlog->flush();
+ break;
+ }
+
+ // ok
+ lock->set_state(LOCK_MIX);
+ lock->decode_locked_state(m->get_data());
+
+ if (caps)
+ issue_caps(in);
+
+ lock->finish_waiters(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE);
+ break;
+
+
+ // -- auth --
+ case LOCK_AC_LOCKACK:
+ assert(lock->get_state() == LOCK_SYNC_LOCK ||
+ lock->get_state() == LOCK_MIX_LOCK ||
+ lock->get_state() == LOCK_MIX_LOCK2 ||
+ lock->get_state() == LOCK_MIX_EXCL ||
+ lock->get_state() == LOCK_SYNC_EXCL ||
+ lock->get_state() == LOCK_SYNC_MIX ||
+ lock->get_state() == LOCK_MIX_TSYN);
+ assert(lock->is_gathering(from));
+ lock->remove_gather(from);
+
+ if (lock->get_state() == LOCK_MIX_LOCK ||
+ lock->get_state() == LOCK_MIX_LOCK2 ||
+ lock->get_state() == LOCK_MIX_EXCL ||
+ lock->get_state() == LOCK_MIX_TSYN) {
+ lock->decode_locked_state(m->get_data());
+ // replica is waiting for AC_LOCKFLUSHED, eval_gather() should not
+ // delay calling scatter_writebehind().
+ lock->clear_flushed();
+ }
+
+ if (lock->is_gathering()) {
+ dout(7) << "handle_file_lock " << *in << " from " << from
+ << ", still gathering " << lock->get_gather_set() << dendl;
+ } else {
+ dout(7) << "handle_file_lock " << *in << " from " << from
+ << ", last one" << dendl;
+ eval_gather(lock);
+ }
+ break;
+
+ case LOCK_AC_SYNCACK:
+ assert(lock->get_state() == LOCK_MIX_SYNC);
+ assert(lock->is_gathering(from));
+ lock->remove_gather(from);
+
+ lock->decode_locked_state(m->get_data());
+
+ if (lock->is_gathering()) {
+ dout(7) << "handle_file_lock " << *in << " from " << from
+ << ", still gathering " << lock->get_gather_set() << dendl;
+ } else {
+ dout(7) << "handle_file_lock " << *in << " from " << from
+ << ", last one" << dendl;
+ eval_gather(lock);
+ }
+ break;
+
+ case LOCK_AC_MIXACK:
+ assert(lock->get_state() == LOCK_SYNC_MIX);
+ assert(lock->is_gathering(from));
+ lock->remove_gather(from);
+
+ if (lock->is_gathering()) {
+ dout(7) << "handle_file_lock " << *in << " from " << from
+ << ", still gathering " << lock->get_gather_set() << dendl;
+ } else {
+ dout(7) << "handle_file_lock " << *in << " from " << from
+ << ", last one" << dendl;
+ eval_gather(lock);
+ }
+ break;
+
+
+ // requests....
+ case LOCK_AC_REQSCATTER:
+ if (lock->is_stable()) {
+ /* NOTE: we can do this _even_ if !can_auth_pin (i.e. freezing)
+ * because the replica should be holding an auth_pin if they're
+ * doing this (and thus, we are freezing, not frozen, and indefinite
+ * starvation isn't an issue).
+ */
+ dout(7) << "handle_file_lock got scatter request on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ if (lock->get_state() != LOCK_MIX) // i.e., the reqscatter didn't race with an actual mix/scatter
+ scatter_mix(lock);
+ } else {
+ dout(7) << "handle_file_lock got scatter request, !stable, marking scatter_wanted on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ lock->set_scatter_wanted();
+ }
+ break;
+
+ case LOCK_AC_REQUNSCATTER:
+ if (lock->is_stable()) {
+ /* NOTE: we can do this _even_ if !can_auth_pin (i.e. freezing)
+ * because the replica should be holding an auth_pin if they're
+ * doing this (and thus, we are freezing, not frozen, and indefinite
+ * starvation isn't an issue).
+ */
+ dout(7) << "handle_file_lock got unscatter request on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ if (lock->get_state() == LOCK_MIX) // i.e., the reqscatter didn't race with an actual mix/scatter
+ simple_lock(lock); // FIXME tempsync?
+ } else {
+ dout(7) << "handle_file_lock ignoring unscatter request on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ lock->set_unscatter_wanted();
+ }
+ break;
+
+ case LOCK_AC_REQRDLOCK:
+ handle_reqrdlock(lock, m);
+ break;
+
+ case LOCK_AC_NUDGE:
+ if (!lock->get_parent()->is_auth()) {
+ dout(7) << "handle_file_lock IGNORING nudge on non-auth " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ } else if (!lock->get_parent()->is_replicated()) {
+ dout(7) << "handle_file_lock IGNORING nudge on non-replicated " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ } else {
+ dout(7) << "handle_file_lock trying nudge on " << *lock
+ << " on " << *lock->get_parent() << dendl;
+ scatter_nudge(lock, 0, true);
+ mds->mdlog->flush();
+ }
+ break;
+
+ default:
+ ceph_abort();
+ }
+
+ m->put();
+}
+
+
+
+
+
+
Code Review / stor4nfv.git / blobdiff