X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Fmds%2FMDSRank.cc;fp=src%2Fceph%2Fsrc%2Fmds%2FMDSRank.cc;h=0000000000000000000000000000000000000000;hb=7da45d65be36d36b880cc55c5036e96c24b53f00;hp=51ae378947f57f30fbb44557670b2ce98e36a775;hpb=691462d09d0987b47e112d6ee8740375df3c51b2;p=stor4nfv.git diff --git a/src/ceph/src/mds/MDSRank.cc b/src/ceph/src/mds/MDSRank.cc deleted file mode 100644 index 51ae378..0000000 --- a/src/ceph/src/mds/MDSRank.cc +++ /dev/null @@ -1,2895 +0,0 @@ -// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- -// vim: ts=8 sw=2 smarttab -/* - * Ceph - scalable distributed file system - * - * Copyright (C) 2015 Red Hat - * - * This is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License version 2.1, as published by the Free Software - * Foundation. See file COPYING. - * - */ - -#include "common/debug.h" -#include "common/errno.h" - -#include "messages/MClientRequestForward.h" -#include "messages/MMDSLoadTargets.h" -#include "messages/MMDSMap.h" -#include "messages/MMDSTableRequest.h" -#include "messages/MCommand.h" -#include "messages/MCommandReply.h" - -#include "MDSDaemon.h" -#include "MDSMap.h" -#include "SnapClient.h" -#include "SnapServer.h" -#include "MDBalancer.h" -#include "Locker.h" -#include "Server.h" -#include "InoTable.h" -#include "mon/MonClient.h" -#include "common/HeartbeatMap.h" -#include "ScrubStack.h" - - -#include "MDSRank.h" - -#define dout_context g_ceph_context -#define dout_subsys ceph_subsys_mds -#undef dout_prefix -#define dout_prefix *_dout << "mds." << whoami << '.' << incarnation << ' ' - -MDSRank::MDSRank( - mds_rank_t whoami_, - Mutex &mds_lock_, - LogChannelRef &clog_, - SafeTimer &timer_, - Beacon &beacon_, - MDSMap *& mdsmap_, - Messenger *msgr, - MonClient *monc_, - Context *respawn_hook_, - Context *suicide_hook_) - : - whoami(whoami_), incarnation(0), - mds_lock(mds_lock_), clog(clog_), timer(timer_), - mdsmap(mdsmap_), - objecter(new Objecter(g_ceph_context, msgr, monc_, nullptr, 0, 0)), - server(NULL), mdcache(NULL), locker(NULL), mdlog(NULL), - balancer(NULL), scrubstack(NULL), - damage_table(whoami_), - inotable(NULL), snapserver(NULL), snapclient(NULL), - sessionmap(this), logger(NULL), mlogger(NULL), - op_tracker(g_ceph_context, g_conf->mds_enable_op_tracker, - g_conf->osd_num_op_tracker_shard), - last_state(MDSMap::STATE_BOOT), - state(MDSMap::STATE_BOOT), - cluster_degraded(false), stopping(false), - purge_queue(g_ceph_context, whoami_, - mdsmap_->get_metadata_pool(), objecter, - new FunctionContext( - [this](int r){ - // Purge Queue operates inside mds_lock when we're calling into - // it, and outside when in background, so must handle both cases. - if (mds_lock.is_locked_by_me()) { - damaged(); - } else { - damaged_unlocked(); - } - } - ) - ), - progress_thread(this), dispatch_depth(0), - hb(NULL), last_tid(0), osd_epoch_barrier(0), beacon(beacon_), - mds_slow_req_count(0), - last_client_mdsmap_bcast(0), - messenger(msgr), monc(monc_), - respawn_hook(respawn_hook_), - suicide_hook(suicide_hook_), - standby_replaying(false) -{ - hb = g_ceph_context->get_heartbeat_map()->add_worker("MDSRank", pthread_self()); - - purge_queue.update_op_limit(*mdsmap); - - objecter->unset_honor_osdmap_full(); - - finisher = new Finisher(msgr->cct); - - mdcache = new MDCache(this, purge_queue); - mdlog = new MDLog(this); - balancer = new MDBalancer(this, messenger, monc); - - scrubstack = new ScrubStack(mdcache, finisher); - - inotable = new InoTable(this); - snapserver = new SnapServer(this, monc); - snapclient = new SnapClient(this); - - server = new Server(this); - locker = new Locker(this, mdcache); - - op_tracker.set_complaint_and_threshold(msgr->cct->_conf->mds_op_complaint_time, - msgr->cct->_conf->mds_op_log_threshold); - op_tracker.set_history_size_and_duration(msgr->cct->_conf->mds_op_history_size, - msgr->cct->_conf->mds_op_history_duration); -} - -MDSRank::~MDSRank() -{ - if (hb) { - g_ceph_context->get_heartbeat_map()->remove_worker(hb); - } - - if (scrubstack) { delete scrubstack; scrubstack = NULL; } - if (mdcache) { delete mdcache; mdcache = NULL; } - if (mdlog) { delete mdlog; mdlog = NULL; } - if (balancer) { delete balancer; balancer = NULL; } - if (inotable) { delete inotable; inotable = NULL; } - if (snapserver) { delete snapserver; snapserver = NULL; } - if (snapclient) { delete snapclient; snapclient = NULL; } - if (mdsmap) { delete mdsmap; mdsmap = 0; } - - if (server) { delete server; server = 0; } - if (locker) { delete locker; locker = 0; } - - if (logger) { - g_ceph_context->get_perfcounters_collection()->remove(logger); - delete logger; - logger = 0; - } - if (mlogger) { - g_ceph_context->get_perfcounters_collection()->remove(mlogger); - delete mlogger; - mlogger = 0; - } - - delete finisher; - finisher = NULL; - - delete suicide_hook; - suicide_hook = NULL; - - delete respawn_hook; - respawn_hook = NULL; - - delete objecter; - objecter = nullptr; -} - -void MDSRankDispatcher::init() -{ - objecter->init(); - messenger->add_dispatcher_head(objecter); - - objecter->start(); - - update_log_config(); - create_logger(); - - // Expose the OSDMap (already populated during MDS::init) to anyone - // who is interested in it. - handle_osd_map(); - - progress_thread.create("mds_rank_progr"); - - purge_queue.init(); - - finisher->start(); -} - -void MDSRank::update_targets(utime_t now) -{ - // get MonMap's idea of my export_targets - const set& map_targets = mdsmap->get_mds_info(get_nodeid()).export_targets; - - dout(20) << "updating export targets, currently " << map_targets.size() << " ranks are targets" << dendl; - - bool send = false; - set new_map_targets; - - auto it = export_targets.begin(); - while (it != export_targets.end()) { - mds_rank_t rank = it->first; - double val = it->second.get(now); - dout(20) << "export target mds." << rank << " value is " << val << " @ " << now << dendl; - - if (val <= 0.01) { - dout(15) << "export target mds." << rank << " is no longer an export target" << dendl; - export_targets.erase(it++); - send = true; - continue; - } - if (!map_targets.count(rank)) { - dout(15) << "export target mds." << rank << " not in map's export_targets" << dendl; - send = true; - } - new_map_targets.insert(rank); - it++; - } - if (new_map_targets.size() < map_targets.size()) { - dout(15) << "export target map holds stale targets, sending update" << dendl; - send = true; - } - - if (send) { - dout(15) << "updating export_targets, now " << new_map_targets.size() << " ranks are targets" << dendl; - MMDSLoadTargets* m = new MMDSLoadTargets(mds_gid_t(monc->get_global_id()), new_map_targets); - monc->send_mon_message(m); - } -} - -void MDSRank::hit_export_target(utime_t now, mds_rank_t rank, double amount) -{ - double rate = g_conf->mds_bal_target_decay; - if (amount < 0.0) { - amount = 100.0/g_conf->mds_bal_target_decay; /* a good default for "i am trying to keep this export_target active" */ - } - auto em = export_targets.emplace(std::piecewise_construct, std::forward_as_tuple(rank), std::forward_as_tuple(now, DecayRate(rate))); - if (em.second) { - dout(15) << "hit export target (new) " << amount << " @ " << now << dendl; - } else { - dout(15) << "hit export target " << amount << " @ " << now << dendl; - } - em.first->second.hit(now, amount); -} - -void MDSRankDispatcher::tick() -{ - heartbeat_reset(); - - if (beacon.is_laggy()) { - dout(5) << "tick bailing out since we seem laggy" << dendl; - return; - } - - check_ops_in_flight(); - - // Wake up thread in case we use to be laggy and have waiting_for_nolaggy - // messages to progress. - progress_thread.signal(); - - // make sure mds log flushes, trims periodically - mdlog->flush(); - - if (is_active() || is_stopping()) { - mdcache->trim(); - mdcache->trim_client_leases(); - mdcache->check_memory_usage(); - mdlog->trim(); // NOT during recovery! - } - - // log - mds_load_t load = balancer->get_load(ceph_clock_now()); - - if (logger) { - logger->set(l_mds_load_cent, 100 * load.mds_load()); - logger->set(l_mds_dispatch_queue_len, messenger->get_dispatch_queue_len()); - logger->set(l_mds_subtrees, mdcache->num_subtrees()); - - mdcache->log_stat(); - } - - // ... - if (is_clientreplay() || is_active() || is_stopping()) { - server->find_idle_sessions(); - locker->tick(); - } - - if (is_reconnect()) - server->reconnect_tick(); - - if (is_active()) { - balancer->tick(); - mdcache->find_stale_fragment_freeze(); - mdcache->migrator->find_stale_export_freeze(); - if (snapserver) - snapserver->check_osd_map(false); - } - - if (is_active() || is_stopping()) { - update_targets(ceph_clock_now()); - } - - // shut down? - if (is_stopping()) { - mdlog->trim(); - if (mdcache->shutdown_pass()) { - uint64_t pq_progress = 0 ; - uint64_t pq_total = 0; - size_t pq_in_flight = 0; - if (!purge_queue.drain(&pq_progress, &pq_total, &pq_in_flight)) { - dout(7) << "shutdown_pass=true, but still waiting for purge queue" - << dendl; - // This takes unbounded time, so we must indicate progress - // to the administrator: we do it in a slightly imperfect way - // by sending periodic (tick frequency) clog messages while - // in this state. - clog->info() << "MDS rank " << whoami << " waiting for purge queue (" - << std::dec << pq_progress << "/" << pq_total << " " << pq_in_flight - << " files purging" << ")"; - } else { - dout(7) << "shutdown_pass=true, finished w/ shutdown, moving to " - "down:stopped" << dendl; - stopping_done(); - } - } - else { - dout(7) << "shutdown_pass=false" << dendl; - } - } - - // Expose ourselves to Beacon to update health indicators - beacon.notify_health(this); -} - -void MDSRankDispatcher::shutdown() -{ - // It should never be possible for shutdown to get called twice, because - // anyone picking up mds_lock checks if stopping is true and drops - // out if it is. - assert(stopping == false); - stopping = true; - - dout(1) << __func__ << ": shutting down rank " << whoami << dendl; - - timer.shutdown(); - - // MDLog has to shut down before the finisher, because some of its - // threads block on IOs that require finisher to complete. - mdlog->shutdown(); - - // shut down cache - mdcache->shutdown(); - - purge_queue.shutdown(); - - mds_lock.Unlock(); - finisher->stop(); // no flushing - mds_lock.Lock(); - - if (objecter->initialized) - objecter->shutdown(); - - monc->shutdown(); - - op_tracker.on_shutdown(); - - progress_thread.shutdown(); - - // release mds_lock for finisher/messenger threads (e.g. - // MDSDaemon::ms_handle_reset called from Messenger). - mds_lock.Unlock(); - - // shut down messenger - messenger->shutdown(); - - mds_lock.Lock(); - - // Workaround unclean shutdown: HeartbeatMap will assert if - // worker is not removed (as we do in ~MDS), but ~MDS is not - // always called after suicide. - if (hb) { - g_ceph_context->get_heartbeat_map()->remove_worker(hb); - hb = NULL; - } -} - -/** - * Helper for simple callbacks that call a void fn with no args. - */ -class C_MDS_VoidFn : public MDSInternalContext -{ - typedef void (MDSRank::*fn_ptr)(); - protected: - fn_ptr fn; - public: - C_MDS_VoidFn(MDSRank *mds_, fn_ptr fn_) - : MDSInternalContext(mds_), fn(fn_) - { - assert(mds_); - assert(fn_); - } - - void finish(int r) override - { - (mds->*fn)(); - } -}; - -int64_t MDSRank::get_metadata_pool() -{ - return mdsmap->get_metadata_pool(); -} - -MDSTableClient *MDSRank::get_table_client(int t) -{ - switch (t) { - case TABLE_ANCHOR: return NULL; - case TABLE_SNAP: return snapclient; - default: ceph_abort(); - } -} - -MDSTableServer *MDSRank::get_table_server(int t) -{ - switch (t) { - case TABLE_ANCHOR: return NULL; - case TABLE_SNAP: return snapserver; - default: ceph_abort(); - } -} - -void MDSRank::suicide() -{ - if (suicide_hook) { - suicide_hook->complete(0); - suicide_hook = NULL; - } -} - -void MDSRank::respawn() -{ - if (respawn_hook) { - respawn_hook->complete(0); - respawn_hook = NULL; - } -} - -void MDSRank::damaged() -{ - assert(whoami != MDS_RANK_NONE); - assert(mds_lock.is_locked_by_me()); - - beacon.set_want_state(mdsmap, MDSMap::STATE_DAMAGED); - monc->flush_log(); // Flush any clog error from before we were called - beacon.notify_health(this); // Include latest status in our swan song - beacon.send_and_wait(g_conf->mds_mon_shutdown_timeout); - - // It's okay if we timed out and the mon didn't get our beacon, because - // another daemon (or ourselves after respawn) will eventually take the - // rank and report DAMAGED again when it hits same problem we did. - - respawn(); // Respawn into standby in case mon has other work for us -} - -void MDSRank::damaged_unlocked() -{ - Mutex::Locker l(mds_lock); - damaged(); -} - -void MDSRank::handle_write_error(int err) -{ - if (err == -EBLACKLISTED) { - derr << "we have been blacklisted (fenced), respawning..." << dendl; - respawn(); - return; - } - - if (g_conf->mds_action_on_write_error >= 2) { - derr << "unhandled write error " << cpp_strerror(err) << ", suicide..." << dendl; - respawn(); - } else if (g_conf->mds_action_on_write_error == 1) { - derr << "unhandled write error " << cpp_strerror(err) << ", force readonly..." << dendl; - mdcache->force_readonly(); - } else { - // ignore; - derr << "unhandled write error " << cpp_strerror(err) << ", ignore..." << dendl; - } -} - -void *MDSRank::ProgressThread::entry() -{ - Mutex::Locker l(mds->mds_lock); - while (true) { - while (!mds->stopping && - mds->finished_queue.empty() && - (mds->waiting_for_nolaggy.empty() || mds->beacon.is_laggy())) { - cond.Wait(mds->mds_lock); - } - - if (mds->stopping) { - break; - } - - mds->_advance_queues(); - } - - return NULL; -} - - -void MDSRank::ProgressThread::shutdown() -{ - assert(mds->mds_lock.is_locked_by_me()); - assert(mds->stopping); - - if (am_self()) { - // Stopping is set, we will fall out of our main loop naturally - } else { - // Kick the thread to notice mds->stopping, and join it - cond.Signal(); - mds->mds_lock.Unlock(); - if (is_started()) - join(); - mds->mds_lock.Lock(); - } -} - -bool MDSRankDispatcher::ms_dispatch(Message *m) -{ - bool ret; - inc_dispatch_depth(); - ret = _dispatch(m, true); - dec_dispatch_depth(); - return ret; -} - -/* If this function returns true, it recognizes the message and has taken the - * reference. If it returns false, it has done neither. */ -bool MDSRank::_dispatch(Message *m, bool new_msg) -{ - if (is_stale_message(m)) { - m->put(); - return true; - } - - if (beacon.is_laggy()) { - dout(10) << " laggy, deferring " << *m << dendl; - waiting_for_nolaggy.push_back(m); - } else if (new_msg && !waiting_for_nolaggy.empty()) { - dout(10) << " there are deferred messages, deferring " << *m << dendl; - waiting_for_nolaggy.push_back(m); - } else { - if (!handle_deferrable_message(m)) { - dout(0) << "unrecognized message " << *m << dendl; - return false; - } - - heartbeat_reset(); - } - - if (dispatch_depth > 1) - return true; - - // finish any triggered contexts - _advance_queues(); - - if (beacon.is_laggy()) { - // We've gone laggy during dispatch, don't do any - // more housekeeping - return true; - } - - // done with all client replayed requests? - if (is_clientreplay() && - mdcache->is_open() && - replay_queue.empty() && - beacon.get_want_state() == MDSMap::STATE_CLIENTREPLAY) { - int num_requests = mdcache->get_num_client_requests(); - dout(10) << " still have " << num_requests << " active replay requests" << dendl; - if (num_requests == 0) - clientreplay_done(); - } - - // hack: thrash exports - static utime_t start; - utime_t now = ceph_clock_now(); - if (start == utime_t()) - start = now; - /*double el = now - start; - if (el > 30.0 && - el < 60.0)*/ - for (int i=0; imds_thrash_exports; i++) { - set s; - if (!is_active()) break; - mdsmap->get_mds_set(s, MDSMap::STATE_ACTIVE); - if (s.size() < 2 || CInode::count() < 10) - break; // need peers for this to work. - if (mdcache->migrator->get_num_exporting() > g_conf->mds_thrash_exports * 5 || - mdcache->migrator->get_export_queue_size() > g_conf->mds_thrash_exports * 10) - break; - - dout(7) << "mds thrashing exports pass " << (i+1) << "/" << g_conf->mds_thrash_exports << dendl; - - // pick a random dir inode - CInode *in = mdcache->hack_pick_random_inode(); - - list ls; - in->get_dirfrags(ls); - if (!ls.empty()) { // must be an open dir. - list::iterator p = ls.begin(); - int n = rand() % ls.size(); - while (n--) - ++p; - CDir *dir = *p; - if (!dir->get_parent_dir()) continue; // must be linked. - if (!dir->is_auth()) continue; // must be auth. - - mds_rank_t dest; - do { - int k = rand() % s.size(); - set::iterator p = s.begin(); - while (k--) ++p; - dest = *p; - } while (dest == whoami); - mdcache->migrator->export_dir_nicely(dir,dest); - } - } - // hack: thrash fragments - for (int i=0; imds_thrash_fragments; i++) { - if (!is_active()) break; - if (mdcache->get_num_fragmenting_dirs() > 5 * g_conf->mds_thrash_fragments) break; - dout(7) << "mds thrashing fragments pass " << (i+1) << "/" << g_conf->mds_thrash_fragments << dendl; - - // pick a random dir inode - CInode *in = mdcache->hack_pick_random_inode(); - - list ls; - in->get_dirfrags(ls); - if (ls.empty()) continue; // must be an open dir. - CDir *dir = ls.front(); - if (!dir->get_parent_dir()) continue; // must be linked. - if (!dir->is_auth()) continue; // must be auth. - frag_t fg = dir->get_frag(); - if (mdsmap->allows_dirfrags()) { - if ((fg == frag_t() || (rand() % (1 << fg.bits()) == 0))) { - mdcache->split_dir(dir, 1); - } else { - balancer->queue_merge(dir); - } - } - } - - // hack: force hash root? - /* - if (false && - mdcache->get_root() && - mdcache->get_root()->dir && - !(mdcache->get_root()->dir->is_hashed() || - mdcache->get_root()->dir->is_hashing())) { - dout(0) << "hashing root" << dendl; - mdcache->migrator->hash_dir(mdcache->get_root()->dir); - } - */ - - update_mlogger(); - return true; -} - -void MDSRank::update_mlogger() -{ - if (mlogger) { - mlogger->set(l_mdm_ino, CInode::count()); - mlogger->set(l_mdm_dir, CDir::count()); - mlogger->set(l_mdm_dn, CDentry::count()); - mlogger->set(l_mdm_cap, Capability::count()); - mlogger->set(l_mdm_inoa, CInode::increments()); - mlogger->set(l_mdm_inos, CInode::decrements()); - mlogger->set(l_mdm_dira, CDir::increments()); - mlogger->set(l_mdm_dirs, CDir::decrements()); - mlogger->set(l_mdm_dna, CDentry::increments()); - mlogger->set(l_mdm_dns, CDentry::decrements()); - mlogger->set(l_mdm_capa, Capability::increments()); - mlogger->set(l_mdm_caps, Capability::decrements()); - mlogger->set(l_mdm_buf, buffer::get_total_alloc()); - } -} - -/* - * lower priority messages we defer if we seem laggy - */ -bool MDSRank::handle_deferrable_message(Message *m) -{ - int port = m->get_type() & 0xff00; - - switch (port) { - case MDS_PORT_CACHE: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS); - mdcache->dispatch(m); - break; - - case MDS_PORT_MIGRATOR: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS); - mdcache->migrator->dispatch(m); - break; - - default: - switch (m->get_type()) { - // SERVER - case CEPH_MSG_CLIENT_SESSION: - case CEPH_MSG_CLIENT_RECONNECT: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_CLIENT); - // fall-thru - case CEPH_MSG_CLIENT_REQUEST: - server->dispatch(m); - break; - case MSG_MDS_SLAVE_REQUEST: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS); - server->dispatch(m); - break; - - case MSG_MDS_HEARTBEAT: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS); - balancer->proc_message(m); - break; - - case MSG_MDS_TABLE_REQUEST: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS); - { - MMDSTableRequest *req = static_cast(m); - if (req->op < 0) { - MDSTableClient *client = get_table_client(req->table); - client->handle_request(req); - } else { - MDSTableServer *server = get_table_server(req->table); - server->handle_request(req); - } - } - break; - - case MSG_MDS_LOCK: - case MSG_MDS_INODEFILECAPS: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_MDS); - locker->dispatch(m); - break; - - case CEPH_MSG_CLIENT_CAPS: - case CEPH_MSG_CLIENT_CAPRELEASE: - case CEPH_MSG_CLIENT_LEASE: - ALLOW_MESSAGES_FROM(CEPH_ENTITY_TYPE_CLIENT); - locker->dispatch(m); - break; - - default: - return false; - } - } - - return true; -} - -/** - * Advance finished_queue and waiting_for_nolaggy. - * - * Usually drain both queues, but may not drain waiting_for_nolaggy - * if beacon is currently laggy. - */ -void MDSRank::_advance_queues() -{ - assert(mds_lock.is_locked_by_me()); - - while (!finished_queue.empty()) { - dout(7) << "mds has " << finished_queue.size() << " queued contexts" << dendl; - dout(10) << finished_queue << dendl; - list ls; - ls.swap(finished_queue); - while (!ls.empty()) { - dout(10) << " finish " << ls.front() << dendl; - ls.front()->complete(0); - ls.pop_front(); - - heartbeat_reset(); - } - } - - while (!waiting_for_nolaggy.empty()) { - // stop if we're laggy now! - if (beacon.is_laggy()) - break; - - Message *old = waiting_for_nolaggy.front(); - waiting_for_nolaggy.pop_front(); - - if (is_stale_message(old)) { - old->put(); - } else { - dout(7) << " processing laggy deferred " << *old << dendl; - if (!handle_deferrable_message(old)) { - dout(0) << "unrecognized message " << *old << dendl; - old->put(); - } - } - - heartbeat_reset(); - } -} - -/** - * Call this when you take mds_lock, or periodically if you're going to - * hold the lock for a long time (e.g. iterating over clients/inodes) - */ -void MDSRank::heartbeat_reset() -{ - // Any thread might jump into mds_lock and call us immediately - // after a call to suicide() completes, in which case MDSRank::hb - // has been freed and we are a no-op. - if (!hb) { - assert(stopping); - return; - } - - // NB not enabling suicide grace, because the mon takes care of killing us - // (by blacklisting us) when we fail to send beacons, and it's simpler to - // only have one way of dying. - g_ceph_context->get_heartbeat_map()->reset_timeout(hb, g_conf->mds_beacon_grace, 0); -} - -bool MDSRank::is_stale_message(Message *m) const -{ - // from bad mds? - if (m->get_source().is_mds()) { - mds_rank_t from = mds_rank_t(m->get_source().num()); - if (!mdsmap->have_inst(from) || - mdsmap->get_inst(from) != m->get_source_inst() || - mdsmap->is_down(from)) { - // bogus mds? - if (m->get_type() == CEPH_MSG_MDS_MAP) { - dout(5) << "got " << *m << " from old/bad/imposter mds " << m->get_source() - << ", but it's an mdsmap, looking at it" << dendl; - } else if (m->get_type() == MSG_MDS_CACHEEXPIRE && - mdsmap->get_inst(from) == m->get_source_inst()) { - dout(5) << "got " << *m << " from down mds " << m->get_source() - << ", but it's a cache_expire, looking at it" << dendl; - } else { - dout(5) << "got " << *m << " from down/old/bad/imposter mds " << m->get_source() - << ", dropping" << dendl; - return true; - } - } - } - return false; -} - - -void MDSRank::send_message(Message *m, Connection *c) -{ - assert(c); - c->send_message(m); -} - - -void MDSRank::send_message_mds(Message *m, mds_rank_t mds) -{ - if (!mdsmap->is_up(mds)) { - dout(10) << "send_message_mds mds." << mds << " not up, dropping " << *m << dendl; - m->put(); - return; - } - - // send mdsmap first? - if (mds != whoami && peer_mdsmap_epoch[mds] < mdsmap->get_epoch()) { - messenger->send_message(new MMDSMap(monc->get_fsid(), mdsmap), - mdsmap->get_inst(mds)); - peer_mdsmap_epoch[mds] = mdsmap->get_epoch(); - } - - // send message - messenger->send_message(m, mdsmap->get_inst(mds)); -} - -void MDSRank::forward_message_mds(Message *m, mds_rank_t mds) -{ - assert(mds != whoami); - - // client request? - if (m->get_type() == CEPH_MSG_CLIENT_REQUEST && - (static_cast(m))->get_source().is_client()) { - MClientRequest *creq = static_cast(m); - creq->inc_num_fwd(); // inc forward counter - - /* - * don't actually forward if non-idempotent! - * client has to do it. although the MDS will ignore duplicate requests, - * the affected metadata may migrate, in which case the new authority - * won't have the metareq_id in the completed request map. - */ - // NEW: always make the client resend! - bool client_must_resend = true; //!creq->can_forward(); - - // tell the client where it should go - messenger->send_message(new MClientRequestForward(creq->get_tid(), mds, creq->get_num_fwd(), - client_must_resend), - creq->get_source_inst()); - - if (client_must_resend) { - m->put(); - return; - } - } - - // these are the only types of messages we should be 'forwarding'; they - // explicitly encode their source mds, which gets clobbered when we resend - // them here. - assert(m->get_type() == MSG_MDS_DIRUPDATE || - m->get_type() == MSG_MDS_EXPORTDIRDISCOVER); - - // send mdsmap first? - if (peer_mdsmap_epoch[mds] < mdsmap->get_epoch()) { - messenger->send_message(new MMDSMap(monc->get_fsid(), mdsmap), - mdsmap->get_inst(mds)); - peer_mdsmap_epoch[mds] = mdsmap->get_epoch(); - } - - messenger->send_message(m, mdsmap->get_inst(mds)); -} - - - -void MDSRank::send_message_client_counted(Message *m, client_t client) -{ - Session *session = sessionmap.get_session(entity_name_t::CLIENT(client.v)); - if (session) { - send_message_client_counted(m, session); - } else { - dout(10) << "send_message_client_counted no session for client." << client << " " << *m << dendl; - } -} - -void MDSRank::send_message_client_counted(Message *m, Connection *connection) -{ - Session *session = static_cast(connection->get_priv()); - if (session) { - session->put(); // do not carry ref - send_message_client_counted(m, session); - } else { - dout(10) << "send_message_client_counted has no session for " << m->get_source_inst() << dendl; - // another Connection took over the Session - } -} - -void MDSRank::send_message_client_counted(Message *m, Session *session) -{ - version_t seq = session->inc_push_seq(); - dout(10) << "send_message_client_counted " << session->info.inst.name << " seq " - << seq << " " << *m << dendl; - if (session->connection) { - session->connection->send_message(m); - } else { - session->preopen_out_queue.push_back(m); - } -} - -void MDSRank::send_message_client(Message *m, Session *session) -{ - dout(10) << "send_message_client " << session->info.inst << " " << *m << dendl; - if (session->connection) { - session->connection->send_message(m); - } else { - session->preopen_out_queue.push_back(m); - } -} - -/** - * This is used whenever a RADOS operation has been cancelled - * or a RADOS client has been blacklisted, to cause the MDS and - * any clients to wait for this OSD epoch before using any new caps. - * - * See doc/cephfs/eviction - */ -void MDSRank::set_osd_epoch_barrier(epoch_t e) -{ - dout(4) << __func__ << ": epoch=" << e << dendl; - osd_epoch_barrier = e; -} - -void MDSRank::retry_dispatch(Message *m) -{ - inc_dispatch_depth(); - _dispatch(m, false); - dec_dispatch_depth(); -} - -utime_t MDSRank::get_laggy_until() const -{ - return beacon.get_laggy_until(); -} - -bool MDSRank::is_daemon_stopping() const -{ - return stopping; -} - -void MDSRank::request_state(MDSMap::DaemonState s) -{ - dout(3) << "request_state " << ceph_mds_state_name(s) << dendl; - beacon.set_want_state(mdsmap, s); - beacon.send(); -} - - -class C_MDS_BootStart : public MDSInternalContext { - MDSRank::BootStep nextstep; -public: - C_MDS_BootStart(MDSRank *m, MDSRank::BootStep n) - : MDSInternalContext(m), nextstep(n) {} - void finish(int r) override { - mds->boot_start(nextstep, r); - } -}; - - -void MDSRank::boot_start(BootStep step, int r) -{ - // Handle errors from previous step - if (r < 0) { - if (is_standby_replay() && (r == -EAGAIN)) { - dout(0) << "boot_start encountered an error EAGAIN" - << ", respawning since we fell behind journal" << dendl; - respawn(); - } else if (r == -EINVAL || r == -ENOENT) { - // Invalid or absent data, indicates damaged on-disk structures - clog->error() << "Error loading MDS rank " << whoami << ": " - << cpp_strerror(r); - damaged(); - assert(r == 0); // Unreachable, damaged() calls respawn() - } else { - // Completely unexpected error, give up and die - dout(0) << "boot_start encountered an error, failing" << dendl; - suicide(); - return; - } - } - - assert(is_starting() || is_any_replay()); - - switch(step) { - case MDS_BOOT_INITIAL: - { - mdcache->init_layouts(); - - MDSGatherBuilder gather(g_ceph_context, - new C_MDS_BootStart(this, MDS_BOOT_OPEN_ROOT)); - dout(2) << "boot_start " << step << ": opening inotable" << dendl; - inotable->set_rank(whoami); - inotable->load(gather.new_sub()); - - dout(2) << "boot_start " << step << ": opening sessionmap" << dendl; - sessionmap.set_rank(whoami); - sessionmap.load(gather.new_sub()); - - dout(2) << "boot_start " << step << ": opening mds log" << dendl; - mdlog->open(gather.new_sub()); - - if (is_starting()) { - dout(2) << "boot_start " << step << ": opening purge queue" << dendl; - purge_queue.open(new C_IO_Wrapper(this, gather.new_sub())); - } else if (!standby_replaying) { - dout(2) << "boot_start " << step << ": opening purge queue (async)" << dendl; - purge_queue.open(NULL); - } - - if (mdsmap->get_tableserver() == whoami) { - dout(2) << "boot_start " << step << ": opening snap table" << dendl; - snapserver->set_rank(whoami); - snapserver->load(gather.new_sub()); - } - - gather.activate(); - } - break; - case MDS_BOOT_OPEN_ROOT: - { - dout(2) << "boot_start " << step << ": loading/discovering base inodes" << dendl; - - MDSGatherBuilder gather(g_ceph_context, - new C_MDS_BootStart(this, MDS_BOOT_PREPARE_LOG)); - - mdcache->open_mydir_inode(gather.new_sub()); - - if (is_starting() || - whoami == mdsmap->get_root()) { // load root inode off disk if we are auth - mdcache->open_root_inode(gather.new_sub()); - } else { - // replay. make up fake root inode to start with - (void)mdcache->create_root_inode(); - } - gather.activate(); - } - break; - case MDS_BOOT_PREPARE_LOG: - if (is_any_replay()) { - dout(2) << "boot_start " << step << ": replaying mds log" << dendl; - MDSGatherBuilder gather(g_ceph_context, - new C_MDS_BootStart(this, MDS_BOOT_REPLAY_DONE)); - - if (!standby_replaying) { - dout(2) << "boot_start " << step << ": waiting for purge queue recovered" << dendl; - purge_queue.wait_for_recovery(new C_IO_Wrapper(this, gather.new_sub())); - } - - mdlog->replay(gather.new_sub()); - gather.activate(); - } else { - dout(2) << "boot_start " << step << ": positioning at end of old mds log" << dendl; - mdlog->append(); - starting_done(); - } - break; - case MDS_BOOT_REPLAY_DONE: - assert(is_any_replay()); - - // Sessiontable and inotable should be in sync after replay, validate - // that they are consistent. - validate_sessions(); - - replay_done(); - break; - } -} - -void MDSRank::validate_sessions() -{ - assert(mds_lock.is_locked_by_me()); - std::vector victims; - - // Identify any sessions which have state inconsistent with other, - // after they have been loaded from rados during startup. - // Mitigate bugs like: http://tracker.ceph.com/issues/16842 - const auto &sessions = sessionmap.get_sessions(); - for (const auto &i : sessions) { - Session *session = i.second; - interval_set badones; - if (inotable->intersects_free(session->info.prealloc_inos, &badones)) { - clog->error() << "Client session loaded with invalid preallocated " - "inodes, evicting session " << *session; - - // Make the session consistent with inotable so that it can - // be cleanly torn down - session->info.prealloc_inos.subtract(badones); - - victims.push_back(session); - } - } - - for (const auto &session: victims) { - server->kill_session(session, nullptr); - } -} - -void MDSRank::starting_done() -{ - dout(3) << "starting_done" << dendl; - assert(is_starting()); - request_state(MDSMap::STATE_ACTIVE); - - mdcache->open_root(); - - if (mdcache->is_open()) { - mdlog->start_new_segment(); - } else { - mdcache->wait_for_open(new MDSInternalContextWrapper(this, - new FunctionContext([this] (int r) { - mdlog->start_new_segment(); - }))); - } -} - - -void MDSRank::calc_recovery_set() -{ - // initialize gather sets - set rs; - mdsmap->get_recovery_mds_set(rs); - rs.erase(whoami); - mdcache->set_recovery_set(rs); - - dout(1) << " recovery set is " << rs << dendl; -} - - -void MDSRank::replay_start() -{ - dout(1) << "replay_start" << dendl; - - if (is_standby_replay()) - standby_replaying = true; - - calc_recovery_set(); - - // Check if we need to wait for a newer OSD map before starting - Context *fin = new C_IO_Wrapper(this, new C_MDS_BootStart(this, MDS_BOOT_INITIAL)); - bool const ready = objecter->wait_for_map( - mdsmap->get_last_failure_osd_epoch(), - fin); - - if (ready) { - delete fin; - boot_start(); - } else { - dout(1) << " waiting for osdmap " << mdsmap->get_last_failure_osd_epoch() - << " (which blacklists prior instance)" << dendl; - } -} - - -class MDSRank::C_MDS_StandbyReplayRestartFinish : public MDSIOContext { - uint64_t old_read_pos; -public: - C_MDS_StandbyReplayRestartFinish(MDSRank *mds_, uint64_t old_read_pos_) : - MDSIOContext(mds_), old_read_pos(old_read_pos_) {} - void finish(int r) override { - mds->_standby_replay_restart_finish(r, old_read_pos); - } -}; - -void MDSRank::_standby_replay_restart_finish(int r, uint64_t old_read_pos) -{ - if (old_read_pos < mdlog->get_journaler()->get_trimmed_pos()) { - dout(0) << "standby MDS fell behind active MDS journal's expire_pos, restarting" << dendl; - respawn(); /* we're too far back, and this is easier than - trying to reset everything in the cache, etc */ - } else { - mdlog->standby_trim_segments(); - boot_start(MDS_BOOT_PREPARE_LOG, r); - } -} - -class MDSRank::C_MDS_StandbyReplayRestart : public MDSInternalContext { -public: - explicit C_MDS_StandbyReplayRestart(MDSRank *m) : MDSInternalContext(m) {} - void finish(int r) override { - assert(!r); - mds->standby_replay_restart(); - } -}; - -void MDSRank::standby_replay_restart() -{ - if (standby_replaying) { - /* Go around for another pass of replaying in standby */ - dout(4) << "standby_replay_restart (as standby)" << dendl; - mdlog->get_journaler()->reread_head_and_probe( - new C_MDS_StandbyReplayRestartFinish( - this, - mdlog->get_journaler()->get_read_pos())); - } else { - /* We are transitioning out of standby: wait for OSD map update - before making final pass */ - dout(1) << "standby_replay_restart (final takeover pass)" << dendl; - Context *fin = new C_IO_Wrapper(this, new C_MDS_StandbyReplayRestart(this)); - bool ready = objecter->wait_for_map(mdsmap->get_last_failure_osd_epoch(), fin); - if (ready) { - delete fin; - mdlog->get_journaler()->reread_head_and_probe( - new C_MDS_StandbyReplayRestartFinish( - this, - mdlog->get_journaler()->get_read_pos())); - - dout(1) << " opening purge queue (async)" << dendl; - purge_queue.open(NULL); - } else { - dout(1) << " waiting for osdmap " << mdsmap->get_last_failure_osd_epoch() - << " (which blacklists prior instance)" << dendl; - } - } -} - -void MDSRank::replay_done() -{ - dout(1) << "replay_done" << (standby_replaying ? " (as standby)" : "") << dendl; - - if (is_standby_replay()) { - // The replay was done in standby state, and we are still in that state - assert(standby_replaying); - dout(10) << "setting replay timer" << dendl; - timer.add_event_after(g_conf->mds_replay_interval, - new C_MDS_StandbyReplayRestart(this)); - return; - } else if (standby_replaying) { - // The replay was done in standby state, we have now _left_ that state - dout(10) << " last replay pass was as a standby; making final pass" << dendl; - standby_replaying = false; - standby_replay_restart(); - return; - } else { - // Replay is complete, journal read should be up to date - assert(mdlog->get_journaler()->get_read_pos() == mdlog->get_journaler()->get_write_pos()); - assert(!is_standby_replay()); - - // Reformat and come back here - if (mdlog->get_journaler()->get_stream_format() < g_conf->mds_journal_format) { - dout(4) << "reformatting journal on standbyreplay->replay transition" << dendl; - mdlog->reopen(new C_MDS_BootStart(this, MDS_BOOT_REPLAY_DONE)); - return; - } - } - - dout(1) << "making mds journal writeable" << dendl; - mdlog->get_journaler()->set_writeable(); - mdlog->get_journaler()->trim_tail(); - - if (g_conf->mds_wipe_sessions) { - dout(1) << "wiping out client sessions" << dendl; - sessionmap.wipe(); - sessionmap.save(new C_MDSInternalNoop); - } - if (g_conf->mds_wipe_ino_prealloc) { - dout(1) << "wiping out ino prealloc from sessions" << dendl; - sessionmap.wipe_ino_prealloc(); - sessionmap.save(new C_MDSInternalNoop); - } - if (g_conf->mds_skip_ino) { - inodeno_t i = g_conf->mds_skip_ino; - dout(1) << "skipping " << i << " inodes" << dendl; - inotable->skip_inos(i); - inotable->save(new C_MDSInternalNoop); - } - - if (mdsmap->get_num_in_mds() == 1 && - mdsmap->get_num_failed_mds() == 0) { // just me! - dout(2) << "i am alone, moving to state reconnect" << dendl; - request_state(MDSMap::STATE_RECONNECT); - } else { - dout(2) << "i am not alone, moving to state resolve" << dendl; - request_state(MDSMap::STATE_RESOLVE); - } -} - -void MDSRank::reopen_log() -{ - dout(1) << "reopen_log" << dendl; - mdcache->rollback_uncommitted_fragments(); -} - - -void MDSRank::resolve_start() -{ - dout(1) << "resolve_start" << dendl; - - reopen_log(); - - mdcache->resolve_start(new C_MDS_VoidFn(this, &MDSRank::resolve_done)); - finish_contexts(g_ceph_context, waiting_for_resolve); -} -void MDSRank::resolve_done() -{ - dout(1) << "resolve_done" << dendl; - request_state(MDSMap::STATE_RECONNECT); -} - -void MDSRank::reconnect_start() -{ - dout(1) << "reconnect_start" << dendl; - - if (last_state == MDSMap::STATE_REPLAY) { - reopen_log(); - } - - // Drop any blacklisted clients from the SessionMap before going - // into reconnect, so that we don't wait for them. - objecter->enable_blacklist_events(); - std::set blacklist; - epoch_t epoch = 0; - objecter->with_osdmap([this, &blacklist, &epoch](const OSDMap& o) { - o.get_blacklist(&blacklist); - epoch = o.get_epoch(); - }); - auto killed = server->apply_blacklist(blacklist); - dout(4) << "reconnect_start: killed " << killed << " blacklisted sessions (" - << blacklist.size() << " blacklist entries, " - << sessionmap.get_sessions().size() << ")" << dendl; - if (killed) { - set_osd_epoch_barrier(epoch); - } - - server->reconnect_clients(new C_MDS_VoidFn(this, &MDSRank::reconnect_done)); - finish_contexts(g_ceph_context, waiting_for_reconnect); -} -void MDSRank::reconnect_done() -{ - dout(1) << "reconnect_done" << dendl; - request_state(MDSMap::STATE_REJOIN); // move to rejoin state -} - -void MDSRank::rejoin_joint_start() -{ - dout(1) << "rejoin_joint_start" << dendl; - mdcache->rejoin_send_rejoins(); -} -void MDSRank::rejoin_start() -{ - dout(1) << "rejoin_start" << dendl; - mdcache->rejoin_start(new C_MDS_VoidFn(this, &MDSRank::rejoin_done)); -} -void MDSRank::rejoin_done() -{ - dout(1) << "rejoin_done" << dendl; - mdcache->show_subtrees(); - mdcache->show_cache(); - - // funny case: is our cache empty? no subtrees? - if (!mdcache->is_subtrees()) { - if (whoami == 0) { - // The root should always have a subtree! - clog->error() << "No subtrees found for root MDS rank!"; - damaged(); - assert(mdcache->is_subtrees()); - } else { - dout(1) << " empty cache, no subtrees, leaving cluster" << dendl; - request_state(MDSMap::STATE_STOPPED); - } - return; - } - - if (replay_queue.empty()) - request_state(MDSMap::STATE_ACTIVE); - else - request_state(MDSMap::STATE_CLIENTREPLAY); -} - -void MDSRank::clientreplay_start() -{ - dout(1) << "clientreplay_start" << dendl; - finish_contexts(g_ceph_context, waiting_for_replay); // kick waiters - mdcache->start_files_to_recover(); - queue_one_replay(); -} - -bool MDSRank::queue_one_replay() -{ - if (replay_queue.empty()) { - mdlog->wait_for_safe(new C_MDS_VoidFn(this, &MDSRank::clientreplay_done)); - return false; - } - queue_waiter(replay_queue.front()); - replay_queue.pop_front(); - return true; -} - -void MDSRank::clientreplay_done() -{ - dout(1) << "clientreplay_done" << dendl; - request_state(MDSMap::STATE_ACTIVE); -} - -void MDSRank::active_start() -{ - dout(1) << "active_start" << dendl; - - if (last_state == MDSMap::STATE_CREATING) { - mdcache->open_root(); - } - - mdcache->clean_open_file_lists(); - mdcache->export_remaining_imported_caps(); - finish_contexts(g_ceph_context, waiting_for_replay); // kick waiters - mdcache->start_files_to_recover(); - - mdcache->reissue_all_caps(); - mdcache->activate_stray_manager(); - - finish_contexts(g_ceph_context, waiting_for_active); // kick waiters -} - -void MDSRank::recovery_done(int oldstate) -{ - dout(1) << "recovery_done -- successful recovery!" << dendl; - assert(is_clientreplay() || is_active()); - - // kick snaptable (resent AGREEs) - if (mdsmap->get_tableserver() == whoami) { - set active; - mdsmap->get_clientreplay_or_active_or_stopping_mds_set(active); - snapserver->finish_recovery(active); - } - - if (oldstate == MDSMap::STATE_CREATING) - return; - - mdcache->start_recovered_truncates(); - mdcache->do_file_recover(); - - // tell connected clients - //bcast_mds_map(); // not anymore, they get this from the monitor - - mdcache->populate_mydir(); -} - -void MDSRank::creating_done() -{ - dout(1)<< "creating_done" << dendl; - request_state(MDSMap::STATE_ACTIVE); -} - -void MDSRank::boot_create() -{ - dout(3) << "boot_create" << dendl; - - MDSGatherBuilder fin(g_ceph_context, new C_MDS_VoidFn(this, &MDSRank::creating_done)); - - mdcache->init_layouts(); - - snapserver->set_rank(whoami); - inotable->set_rank(whoami); - sessionmap.set_rank(whoami); - - // start with a fresh journal - dout(10) << "boot_create creating fresh journal" << dendl; - mdlog->create(fin.new_sub()); - - // open new journal segment, but do not journal subtree map (yet) - mdlog->prepare_new_segment(); - - if (whoami == mdsmap->get_root()) { - dout(3) << "boot_create creating fresh hierarchy" << dendl; - mdcache->create_empty_hierarchy(fin.get()); - } - - dout(3) << "boot_create creating mydir hierarchy" << dendl; - mdcache->create_mydir_hierarchy(fin.get()); - - // fixme: fake out inotable (reset, pretend loaded) - dout(10) << "boot_create creating fresh inotable table" << dendl; - inotable->reset(); - inotable->save(fin.new_sub()); - - // write empty sessionmap - sessionmap.save(fin.new_sub()); - - // Create empty purge queue - purge_queue.create(new C_IO_Wrapper(this, fin.new_sub())); - - // initialize tables - if (mdsmap->get_tableserver() == whoami) { - dout(10) << "boot_create creating fresh snaptable" << dendl; - snapserver->reset(); - snapserver->save(fin.new_sub()); - } - - assert(g_conf->mds_kill_create_at != 1); - - // ok now journal it - mdlog->journal_segment_subtree_map(fin.new_sub()); - mdlog->flush(); - - // Usually we do this during reconnect, but creation skips that. - objecter->enable_blacklist_events(); - - fin.activate(); -} - -void MDSRank::stopping_start() -{ - dout(2) << "stopping_start" << dendl; - - if (mdsmap->get_num_in_mds() == 1 && !sessionmap.empty()) { - // we're the only mds up! - dout(0) << "we are the last MDS, and have mounted clients: we cannot flush our journal. suicide!" << dendl; - suicide(); - } - - mdcache->shutdown_start(); -} - -void MDSRank::stopping_done() -{ - dout(2) << "stopping_done" << dendl; - - // tell monitor we shut down cleanly. - request_state(MDSMap::STATE_STOPPED); -} - -void MDSRankDispatcher::handle_mds_map( - MMDSMap *m, - MDSMap *oldmap) -{ - // I am only to be passed MDSMaps in which I hold a rank - assert(whoami != MDS_RANK_NONE); - - MDSMap::DaemonState oldstate = state; - mds_gid_t mds_gid = mds_gid_t(monc->get_global_id()); - state = mdsmap->get_state_gid(mds_gid); - if (state != oldstate) { - last_state = oldstate; - incarnation = mdsmap->get_inc_gid(mds_gid); - } - - version_t epoch = m->get_epoch(); - - // note source's map version - if (m->get_source().is_mds() && - peer_mdsmap_epoch[mds_rank_t(m->get_source().num())] < epoch) { - dout(15) << " peer " << m->get_source() - << " has mdsmap epoch >= " << epoch - << dendl; - peer_mdsmap_epoch[mds_rank_t(m->get_source().num())] = epoch; - } - - // Validate state transitions while I hold a rank - if (!MDSMap::state_transition_valid(oldstate, state)) { - derr << "Invalid state transition " << ceph_mds_state_name(oldstate) - << "->" << ceph_mds_state_name(state) << dendl; - respawn(); - } - - if (oldstate != state) { - // update messenger. - if (state == MDSMap::STATE_STANDBY_REPLAY) { - dout(1) << "handle_mds_map i am now mds." << mds_gid << "." << incarnation - << " replaying mds." << whoami << "." << incarnation << dendl; - messenger->set_myname(entity_name_t::MDS(mds_gid)); - } else { - dout(1) << "handle_mds_map i am now mds." << whoami << "." << incarnation << dendl; - messenger->set_myname(entity_name_t::MDS(whoami)); - } - } - - // tell objecter my incarnation - if (objecter->get_client_incarnation() != incarnation) - objecter->set_client_incarnation(incarnation); - - // for debug - if (g_conf->mds_dump_cache_on_map) - mdcache->dump_cache(); - - // did it change? - if (oldstate != state) { - dout(1) << "handle_mds_map state change " - << ceph_mds_state_name(oldstate) << " --> " - << ceph_mds_state_name(state) << dendl; - beacon.set_want_state(mdsmap, state); - - if (oldstate == MDSMap::STATE_STANDBY_REPLAY) { - dout(10) << "Monitor activated us! Deactivating replay loop" << dendl; - assert (state == MDSMap::STATE_REPLAY); - } else { - // did i just recover? - if ((is_active() || is_clientreplay()) && - (oldstate == MDSMap::STATE_CREATING || - oldstate == MDSMap::STATE_REJOIN || - oldstate == MDSMap::STATE_RECONNECT)) - recovery_done(oldstate); - - if (is_active()) { - active_start(); - } else if (is_any_replay()) { - replay_start(); - } else if (is_resolve()) { - resolve_start(); - } else if (is_reconnect()) { - reconnect_start(); - } else if (is_rejoin()) { - rejoin_start(); - } else if (is_clientreplay()) { - clientreplay_start(); - } else if (is_creating()) { - boot_create(); - } else if (is_starting()) { - boot_start(); - } else if (is_stopping()) { - assert(oldstate == MDSMap::STATE_ACTIVE); - stopping_start(); - } - } - } - - // RESOLVE - // is someone else newly resolving? - if (is_resolve() || is_reconnect() || is_rejoin() || - is_clientreplay() || is_active() || is_stopping()) { - if (!oldmap->is_resolving() && mdsmap->is_resolving()) { - set resolve; - mdsmap->get_mds_set(resolve, MDSMap::STATE_RESOLVE); - dout(10) << " resolve set is " << resolve << dendl; - calc_recovery_set(); - mdcache->send_resolves(); - } - } - - // REJOIN - // is everybody finally rejoining? - if (is_starting() || is_rejoin() || is_clientreplay() || is_active() || is_stopping()) { - // did we start? - if (!oldmap->is_rejoining() && mdsmap->is_rejoining()) - rejoin_joint_start(); - - // did we finish? - if (g_conf->mds_dump_cache_after_rejoin && - oldmap->is_rejoining() && !mdsmap->is_rejoining()) - mdcache->dump_cache(); // for DEBUG only - - if (oldstate >= MDSMap::STATE_REJOIN || - oldstate == MDSMap::STATE_STARTING) { - // ACTIVE|CLIENTREPLAY|REJOIN => we can discover from them. - set olddis, dis; - oldmap->get_mds_set(olddis, MDSMap::STATE_ACTIVE); - oldmap->get_mds_set(olddis, MDSMap::STATE_CLIENTREPLAY); - oldmap->get_mds_set(olddis, MDSMap::STATE_REJOIN); - mdsmap->get_mds_set(dis, MDSMap::STATE_ACTIVE); - mdsmap->get_mds_set(dis, MDSMap::STATE_CLIENTREPLAY); - mdsmap->get_mds_set(dis, MDSMap::STATE_REJOIN); - for (set::iterator p = dis.begin(); p != dis.end(); ++p) - if (*p != whoami && // not me - olddis.count(*p) == 0) { // newly so? - mdcache->kick_discovers(*p); - mdcache->kick_open_ino_peers(*p); - } - } - } - - cluster_degraded = mdsmap->is_degraded(); - if (oldmap->is_degraded() && !cluster_degraded && state >= MDSMap::STATE_ACTIVE) { - dout(1) << "cluster recovered." << dendl; - auto it = waiting_for_active_peer.find(MDS_RANK_NONE); - if (it != waiting_for_active_peer.end()) { - queue_waiters(it->second); - waiting_for_active_peer.erase(it); - } - } - - // did someone go active? - if (oldstate >= MDSMap::STATE_CLIENTREPLAY && - (is_clientreplay() || is_active() || is_stopping())) { - set oldactive, active; - oldmap->get_mds_set(oldactive, MDSMap::STATE_ACTIVE); - oldmap->get_mds_set(oldactive, MDSMap::STATE_CLIENTREPLAY); - mdsmap->get_mds_set(active, MDSMap::STATE_ACTIVE); - mdsmap->get_mds_set(active, MDSMap::STATE_CLIENTREPLAY); - for (set::iterator p = active.begin(); p != active.end(); ++p) - if (*p != whoami && // not me - oldactive.count(*p) == 0) // newly so? - handle_mds_recovery(*p); - } - - // did someone fail? - // new down? - { - set olddown, down; - oldmap->get_down_mds_set(&olddown); - mdsmap->get_down_mds_set(&down); - for (set::iterator p = down.begin(); p != down.end(); ++p) { - if (oldmap->have_inst(*p) && olddown.count(*p) == 0) { - messenger->mark_down(oldmap->get_inst(*p).addr); - handle_mds_failure(*p); - } - } - } - - // did someone fail? - // did their addr/inst change? - { - set up; - mdsmap->get_up_mds_set(up); - for (set::iterator p = up.begin(); p != up.end(); ++p) { - if (oldmap->have_inst(*p) && - oldmap->get_inst(*p) != mdsmap->get_inst(*p)) { - messenger->mark_down(oldmap->get_inst(*p).addr); - handle_mds_failure(*p); - } - } - } - - if (is_clientreplay() || is_active() || is_stopping()) { - // did anyone stop? - set oldstopped, stopped; - oldmap->get_stopped_mds_set(oldstopped); - mdsmap->get_stopped_mds_set(stopped); - for (set::iterator p = stopped.begin(); p != stopped.end(); ++p) - if (oldstopped.count(*p) == 0) // newly so? - mdcache->migrator->handle_mds_failure_or_stop(*p); - } - - { - map >::iterator p = waiting_for_mdsmap.begin(); - while (p != waiting_for_mdsmap.end() && p->first <= mdsmap->get_epoch()) { - list ls; - ls.swap(p->second); - waiting_for_mdsmap.erase(p++); - finish_contexts(g_ceph_context, ls); - } - } - - if (is_active()) { - // Before going active, set OSD epoch barrier to latest (so that - // we don't risk handing out caps to clients with old OSD maps that - // might not include barriers from the previous incarnation of this MDS) - set_osd_epoch_barrier(objecter->with_osdmap( - std::mem_fn(&OSDMap::get_epoch))); - } - - if (is_active()) { - bool found = false; - MDSMap::mds_info_t info = mdsmap->get_info(whoami); - - for (map::const_iterator p = mdsmap->get_mds_info().begin(); - p != mdsmap->get_mds_info().end(); - ++p) { - if (p->second.state == MDSMap::STATE_STANDBY_REPLAY && - (p->second.standby_for_rank == whoami ||(info.name.length() && p->second.standby_for_name == info.name))) { - found = true; - break; - } - if (found) - mdlog->set_write_iohint(0); - else - mdlog->set_write_iohint(CEPH_OSD_OP_FLAG_FADVISE_DONTNEED); - } - } - - if (oldmap->get_max_mds() != mdsmap->get_max_mds()) { - purge_queue.update_op_limit(*mdsmap); - } -} - -void MDSRank::handle_mds_recovery(mds_rank_t who) -{ - dout(5) << "handle_mds_recovery mds." << who << dendl; - - mdcache->handle_mds_recovery(who); - - if (mdsmap->get_tableserver() == whoami) { - snapserver->handle_mds_recovery(who); - } - - queue_waiters(waiting_for_active_peer[who]); - waiting_for_active_peer.erase(who); -} - -void MDSRank::handle_mds_failure(mds_rank_t who) -{ - if (who == whoami) { - dout(5) << "handle_mds_failure for myself; not doing anything" << dendl; - return; - } - dout(5) << "handle_mds_failure mds." << who << dendl; - - mdcache->handle_mds_failure(who); - - snapclient->handle_mds_failure(who); -} - -bool MDSRankDispatcher::handle_asok_command( - std::string command, cmdmap_t& cmdmap, Formatter *f, - std::ostream& ss) -{ - if (command == "dump_ops_in_flight" || - command == "ops") { - if (!op_tracker.dump_ops_in_flight(f)) { - ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \ - please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards."; - } - } else if (command == "dump_blocked_ops") { - if (!op_tracker.dump_ops_in_flight(f, true)) { - ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \ - Please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards."; - } - } else if (command == "dump_historic_ops") { - if (!op_tracker.dump_historic_ops(f)) { - ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \ - please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards."; - } - } else if (command == "dump_historic_ops_by_duration") { - if (!op_tracker.dump_historic_ops(f, true)) { - ss << "op_tracker tracking is not enabled now, so no ops are tracked currently, even those get stuck. \ - please enable \"osd_enable_op_tracker\", and the tracker will start to track new ops received afterwards."; - } - } else if (command == "osdmap barrier") { - int64_t target_epoch = 0; - bool got_val = cmd_getval(g_ceph_context, cmdmap, "target_epoch", target_epoch); - - if (!got_val) { - ss << "no target epoch given"; - return true; - } - - mds_lock.Lock(); - set_osd_epoch_barrier(target_epoch); - mds_lock.Unlock(); - - C_SaferCond cond; - bool already_got = objecter->wait_for_map(target_epoch, &cond); - if (!already_got) { - dout(4) << __func__ << ": waiting for OSD epoch " << target_epoch << dendl; - cond.wait(); - } - } else if (command == "session ls") { - Mutex::Locker l(mds_lock); - - heartbeat_reset(); - - dump_sessions(SessionFilter(), f); - } else if (command == "session evict") { - std::string client_id; - const bool got_arg = cmd_getval(g_ceph_context, cmdmap, "client_id", client_id); - if(!got_arg) { - ss << "Invalid client_id specified"; - return true; - } - - mds_lock.Lock(); - std::stringstream dss; - bool evicted = evict_client(strtol(client_id.c_str(), 0, 10), true, - g_conf->mds_session_blacklist_on_evict, dss); - if (!evicted) { - dout(15) << dss.str() << dendl; - ss << dss.str(); - } - mds_lock.Unlock(); - } else if (command == "scrub_path") { - string path; - vector scrubop_vec; - cmd_getval(g_ceph_context, cmdmap, "scrubops", scrubop_vec); - cmd_getval(g_ceph_context, cmdmap, "path", path); - command_scrub_path(f, path, scrubop_vec); - } else if (command == "tag path") { - string path; - cmd_getval(g_ceph_context, cmdmap, "path", path); - string tag; - cmd_getval(g_ceph_context, cmdmap, "tag", tag); - command_tag_path(f, path, tag); - } else if (command == "flush_path") { - string path; - cmd_getval(g_ceph_context, cmdmap, "path", path); - command_flush_path(f, path); - } else if (command == "flush journal") { - command_flush_journal(f); - } else if (command == "get subtrees") { - command_get_subtrees(f); - } else if (command == "export dir") { - string path; - if(!cmd_getval(g_ceph_context, cmdmap, "path", path)) { - ss << "malformed path"; - return true; - } - int64_t rank; - if(!cmd_getval(g_ceph_context, cmdmap, "rank", rank)) { - ss << "malformed rank"; - return true; - } - command_export_dir(f, path, (mds_rank_t)rank); - } else if (command == "dump cache") { - Mutex::Locker l(mds_lock); - string path; - int r; - if(!cmd_getval(g_ceph_context, cmdmap, "path", path)) { - r = mdcache->dump_cache(f); - } else { - r = mdcache->dump_cache(path); - } - - if (r != 0) { - ss << "Failed to dump cache: " << cpp_strerror(r); - f->reset(); - } - } else if (command == "cache status") { - Mutex::Locker l(mds_lock); - int r = mdcache->cache_status(f); - if (r != 0) { - ss << "Failed to get cache status: " << cpp_strerror(r); - } - } else if (command == "dump tree") { - string root; - int64_t depth; - cmd_getval(g_ceph_context, cmdmap, "root", root); - if (!cmd_getval(g_ceph_context, cmdmap, "depth", depth)) - depth = -1; - { - Mutex::Locker l(mds_lock); - int r = mdcache->dump_cache(root, depth, f); - if (r != 0) { - ss << "Failed to dump tree: " << cpp_strerror(r); - f->reset(); - } - } - } else if (command == "force_readonly") { - Mutex::Locker l(mds_lock); - mdcache->force_readonly(); - } else if (command == "dirfrag split") { - command_dirfrag_split(cmdmap, ss); - } else if (command == "dirfrag merge") { - command_dirfrag_merge(cmdmap, ss); - } else if (command == "dirfrag ls") { - command_dirfrag_ls(cmdmap, ss, f); - } else { - return false; - } - - return true; -} - -class C_MDS_Send_Command_Reply : public MDSInternalContext -{ -protected: - MCommand *m; -public: - C_MDS_Send_Command_Reply(MDSRank *_mds, MCommand *_m) : - MDSInternalContext(_mds), m(_m) { m->get(); } - void send (int r, const std::string& out_str) { - bufferlist bl; - MDSDaemon::send_command_reply(m, mds, r, bl, out_str); - m->put(); - } - void finish (int r) override { - send(r, ""); - } -}; - -/** - * This function drops the mds_lock, so don't do anything with - * MDSRank after calling it (we could have gone into shutdown): just - * send your result back to the calling client and finish. - */ -void MDSRankDispatcher::evict_clients(const SessionFilter &filter, MCommand *m) -{ - C_MDS_Send_Command_Reply *reply = new C_MDS_Send_Command_Reply(this, m); - - if (is_any_replay()) { - reply->send(-EAGAIN, "MDS is replaying log"); - delete reply; - return; - } - - std::list victims; - const auto sessions = sessionmap.get_sessions(); - for (const auto p : sessions) { - if (!p.first.is_client()) { - continue; - } - - Session *s = p.second; - - if (filter.match(*s, std::bind(&Server::waiting_for_reconnect, server, std::placeholders::_1))) { - victims.push_back(s); - } - } - - dout(20) << __func__ << " matched " << victims.size() << " sessions" << dendl; - - if (victims.empty()) { - reply->send(0, ""); - delete reply; - return; - } - - C_GatherBuilder gather(g_ceph_context, reply); - for (const auto s : victims) { - std::stringstream ss; - evict_client(s->info.inst.name.num(), false, - g_conf->mds_session_blacklist_on_evict, ss, gather.new_sub()); - } - gather.activate(); -} - -void MDSRankDispatcher::dump_sessions(const SessionFilter &filter, Formatter *f) const -{ - // Dump sessions, decorated with recovery/replay status - f->open_array_section("sessions"); - const ceph::unordered_map session_map = sessionmap.get_sessions(); - for (ceph::unordered_map::const_iterator p = session_map.begin(); - p != session_map.end(); - ++p) { - if (!p->first.is_client()) { - continue; - } - - Session *s = p->second; - - if (!filter.match(*s, std::bind(&Server::waiting_for_reconnect, server, std::placeholders::_1))) { - continue; - } - - f->open_object_section("session"); - f->dump_int("id", p->first.num()); - - f->dump_int("num_leases", s->leases.size()); - f->dump_int("num_caps", s->caps.size()); - - f->dump_string("state", s->get_state_name()); - f->dump_int("replay_requests", is_clientreplay() ? s->get_request_count() : 0); - f->dump_unsigned("completed_requests", s->get_num_completed_requests()); - f->dump_bool("reconnecting", server->waiting_for_reconnect(p->first.num())); - f->dump_stream("inst") << s->info.inst; - f->open_object_section("client_metadata"); - for (map::const_iterator i = s->info.client_metadata.begin(); - i != s->info.client_metadata.end(); ++i) { - f->dump_string(i->first.c_str(), i->second); - } - f->close_section(); // client_metadata - f->close_section(); //session - } - f->close_section(); //sessions -} - -void MDSRank::command_scrub_path(Formatter *f, const string& path, vector& scrubop_vec) -{ - bool force = false; - bool recursive = false; - bool repair = false; - for (vector::iterator i = scrubop_vec.begin() ; i != scrubop_vec.end(); ++i) { - if (*i == "force") - force = true; - else if (*i == "recursive") - recursive = true; - else if (*i == "repair") - repair = true; - } - C_SaferCond scond; - { - Mutex::Locker l(mds_lock); - mdcache->enqueue_scrub(path, "", force, recursive, repair, f, &scond); - } - scond.wait(); - // scrub_dentry() finishers will dump the data for us; we're done! -} - -void MDSRank::command_tag_path(Formatter *f, - const string& path, const std::string &tag) -{ - C_SaferCond scond; - { - Mutex::Locker l(mds_lock); - mdcache->enqueue_scrub(path, tag, true, true, false, f, &scond); - } - scond.wait(); -} - -void MDSRank::command_flush_path(Formatter *f, const string& path) -{ - C_SaferCond scond; - { - Mutex::Locker l(mds_lock); - mdcache->flush_dentry(path, &scond); - } - int r = scond.wait(); - f->open_object_section("results"); - f->dump_int("return_code", r); - f->close_section(); // results -} - -/** - * Wrapper around _command_flush_journal that - * handles serialization of result - */ -void MDSRank::command_flush_journal(Formatter *f) -{ - assert(f != NULL); - - std::stringstream ss; - const int r = _command_flush_journal(&ss); - f->open_object_section("result"); - f->dump_string("message", ss.str()); - f->dump_int("return_code", r); - f->close_section(); -} - -/** - * Implementation of "flush journal" asok command. - * - * @param ss - * Optionally populate with a human readable string describing the - * reason for any unexpected return status. - */ -int MDSRank::_command_flush_journal(std::stringstream *ss) -{ - assert(ss != NULL); - - Mutex::Locker l(mds_lock); - - if (mdcache->is_readonly()) { - dout(5) << __func__ << ": read-only FS" << dendl; - return -EROFS; - } - - if (!is_active()) { - dout(5) << __func__ << ": MDS not active, no-op" << dendl; - return 0; - } - - // I need to seal off the current segment, and then mark all previous segments - // for expiry - mdlog->start_new_segment(); - int r = 0; - - // Flush initially so that all the segments older than our new one - // will be elegible for expiry - { - C_SaferCond mdlog_flushed; - mdlog->flush(); - mdlog->wait_for_safe(new MDSInternalContextWrapper(this, &mdlog_flushed)); - mds_lock.Unlock(); - r = mdlog_flushed.wait(); - mds_lock.Lock(); - if (r != 0) { - *ss << "Error " << r << " (" << cpp_strerror(r) << ") while flushing journal"; - return r; - } - } - - // Because we may not be the last wait_for_safe context on MDLog, and - // subsequent contexts might wake up in the middle of our later trim_all - // and interfere with expiry (by e.g. marking dirs/dentries dirty - // on previous log segments), we run a second wait_for_safe here. - // See #10368 - { - C_SaferCond mdlog_cleared; - mdlog->wait_for_safe(new MDSInternalContextWrapper(this, &mdlog_cleared)); - mds_lock.Unlock(); - r = mdlog_cleared.wait(); - mds_lock.Lock(); - if (r != 0) { - *ss << "Error " << r << " (" << cpp_strerror(r) << ") while flushing journal"; - return r; - } - } - - // Put all the old log segments into expiring or expired state - dout(5) << __func__ << ": beginning segment expiry" << dendl; - r = mdlog->trim_all(); - if (r != 0) { - *ss << "Error " << r << " (" << cpp_strerror(r) << ") while trimming log"; - return r; - } - - // Attach contexts to wait for all expiring segments to expire - MDSGatherBuilder expiry_gather(g_ceph_context); - - const std::set &expiring_segments = mdlog->get_expiring_segments(); - for (std::set::const_iterator i = expiring_segments.begin(); - i != expiring_segments.end(); ++i) { - (*i)->wait_for_expiry(expiry_gather.new_sub()); - } - dout(5) << __func__ << ": waiting for " << expiry_gather.num_subs_created() - << " segments to expire" << dendl; - - if (expiry_gather.has_subs()) { - C_SaferCond cond; - expiry_gather.set_finisher(new MDSInternalContextWrapper(this, &cond)); - expiry_gather.activate(); - - // Drop mds_lock to allow progress until expiry is complete - mds_lock.Unlock(); - int r = cond.wait(); - mds_lock.Lock(); - - assert(r == 0); // MDLog is not allowed to raise errors via wait_for_expiry - } - - dout(5) << __func__ << ": expiry complete, expire_pos/trim_pos is now " << std::hex << - mdlog->get_journaler()->get_expire_pos() << "/" << - mdlog->get_journaler()->get_trimmed_pos() << dendl; - - // Now everyone I'm interested in is expired - mdlog->trim_expired_segments(); - - dout(5) << __func__ << ": trim complete, expire_pos/trim_pos is now " << std::hex << - mdlog->get_journaler()->get_expire_pos() << "/" << - mdlog->get_journaler()->get_trimmed_pos() << dendl; - - // Flush the journal header so that readers will start from after the flushed region - C_SaferCond wrote_head; - mdlog->get_journaler()->write_head(&wrote_head); - mds_lock.Unlock(); // Drop lock to allow messenger dispatch progress - r = wrote_head.wait(); - mds_lock.Lock(); - if (r != 0) { - *ss << "Error " << r << " (" << cpp_strerror(r) << ") while writing header"; - return r; - } - - dout(5) << __func__ << ": write_head complete, all done!" << dendl; - - return 0; -} - - -void MDSRank::command_get_subtrees(Formatter *f) -{ - assert(f != NULL); - Mutex::Locker l(mds_lock); - - std::list subtrees; - mdcache->list_subtrees(subtrees); - - f->open_array_section("subtrees"); - for (std::list::iterator i = subtrees.begin(); i != subtrees.end(); ++i) { - const CDir *dir = *i; - - f->open_object_section("subtree"); - { - f->dump_bool("is_auth", dir->is_auth()); - f->dump_int("auth_first", dir->get_dir_auth().first); - f->dump_int("auth_second", dir->get_dir_auth().second); - f->dump_int("export_pin", dir->inode->get_export_pin()); - f->open_object_section("dir"); - dir->dump(f); - f->close_section(); - } - f->close_section(); - } - f->close_section(); -} - - -void MDSRank::command_export_dir(Formatter *f, - const std::string &path, - mds_rank_t target) -{ - int r = _command_export_dir(path, target); - f->open_object_section("results"); - f->dump_int("return_code", r); - f->close_section(); // results -} - -int MDSRank::_command_export_dir( - const std::string &path, - mds_rank_t target) -{ - Mutex::Locker l(mds_lock); - filepath fp(path.c_str()); - - if (target == whoami || !mdsmap->is_up(target) || !mdsmap->is_in(target)) { - derr << "bad MDS target " << target << dendl; - return -ENOENT; - } - - CInode *in = mdcache->cache_traverse(fp); - if (!in) { - derr << "Bath path '" << path << "'" << dendl; - return -ENOENT; - } - CDir *dir = in->get_dirfrag(frag_t()); - if (!dir || !(dir->is_auth())) { - derr << "bad export_dir path dirfrag frag_t() or dir not auth" << dendl; - return -EINVAL; - } - - mdcache->migrator->export_dir(dir, target); - return 0; -} - -CDir *MDSRank::_command_dirfrag_get( - const cmdmap_t &cmdmap, - std::ostream &ss) -{ - std::string path; - bool got = cmd_getval(g_ceph_context, cmdmap, "path", path); - if (!got) { - ss << "missing path argument"; - return NULL; - } - - std::string frag_str; - if (!cmd_getval(g_ceph_context, cmdmap, "frag", frag_str)) { - ss << "missing frag argument"; - return NULL; - } - - CInode *in = mdcache->cache_traverse(filepath(path.c_str())); - if (!in) { - // TODO really we should load something in if it's not in cache, - // but the infrastructure is harder, and we might still be unable - // to act on it if someone else is auth. - ss << "directory '" << path << "' inode not in cache"; - return NULL; - } - - frag_t fg; - - if (!fg.parse(frag_str.c_str())) { - ss << "frag " << frag_str << " failed to parse"; - return NULL; - } - - CDir *dir = in->get_dirfrag(fg); - if (!dir) { - ss << "frag 0x" << std::hex << in->ino() << "/" << fg << " not in cache (" - "use `dirfrag ls` to see if it should exist)"; - return NULL; - } - - if (!dir->is_auth()) { - ss << "frag " << dir->dirfrag() << " not auth (auth = " - << dir->authority() << ")"; - return NULL; - } - - return dir; -} - -bool MDSRank::command_dirfrag_split( - cmdmap_t cmdmap, - std::ostream &ss) -{ - Mutex::Locker l(mds_lock); - if (!mdsmap->allows_dirfrags()) { - ss << "dirfrags are disallowed by the mds map!"; - return false; - } - - int64_t by = 0; - if (!cmd_getval(g_ceph_context, cmdmap, "bits", by)) { - ss << "missing bits argument"; - return false; - } - - if (by <= 0) { - ss << "must split by >0 bits"; - return false; - } - - CDir *dir = _command_dirfrag_get(cmdmap, ss); - if (!dir) { - return false; - } - - mdcache->split_dir(dir, by); - - return true; -} - -bool MDSRank::command_dirfrag_merge( - cmdmap_t cmdmap, - std::ostream &ss) -{ - Mutex::Locker l(mds_lock); - std::string path; - bool got = cmd_getval(g_ceph_context, cmdmap, "path", path); - if (!got) { - ss << "missing path argument"; - return false; - } - - std::string frag_str; - if (!cmd_getval(g_ceph_context, cmdmap, "frag", frag_str)) { - ss << "missing frag argument"; - return false; - } - - CInode *in = mdcache->cache_traverse(filepath(path.c_str())); - if (!in) { - ss << "directory '" << path << "' inode not in cache"; - return false; - } - - frag_t fg; - if (!fg.parse(frag_str.c_str())) { - ss << "frag " << frag_str << " failed to parse"; - return false; - } - - mdcache->merge_dir(in, fg); - - return true; -} - -bool MDSRank::command_dirfrag_ls( - cmdmap_t cmdmap, - std::ostream &ss, - Formatter *f) -{ - Mutex::Locker l(mds_lock); - std::string path; - bool got = cmd_getval(g_ceph_context, cmdmap, "path", path); - if (!got) { - ss << "missing path argument"; - return false; - } - - CInode *in = mdcache->cache_traverse(filepath(path.c_str())); - if (!in) { - ss << "directory inode not in cache"; - return false; - } - - f->open_array_section("frags"); - std::list frags; - // NB using get_leaves_under instead of get_dirfrags to give - // you the list of what dirfrags may exist, not which are in cache - in->dirfragtree.get_leaves_under(frag_t(), frags); - for (std::list::iterator i = frags.begin(); - i != frags.end(); ++i) { - f->open_object_section("frag"); - f->dump_int("value", i->value()); - f->dump_int("bits", i->bits()); - std::ostringstream frag_str; - frag_str << std::hex << i->value() << "/" << std::dec << i->bits(); - f->dump_string("str", frag_str.str()); - f->close_section(); - } - f->close_section(); - - return true; -} - -void MDSRank::dump_status(Formatter *f) const -{ - if (state == MDSMap::STATE_REPLAY || - state == MDSMap::STATE_STANDBY_REPLAY) { - mdlog->dump_replay_status(f); - } else if (state == MDSMap::STATE_RESOLVE) { - mdcache->dump_resolve_status(f); - } else if (state == MDSMap::STATE_RECONNECT) { - server->dump_reconnect_status(f); - } else if (state == MDSMap::STATE_REJOIN) { - mdcache->dump_rejoin_status(f); - } else if (state == MDSMap::STATE_CLIENTREPLAY) { - dump_clientreplay_status(f); - } -} - -void MDSRank::dump_clientreplay_status(Formatter *f) const -{ - f->open_object_section("clientreplay_status"); - f->dump_unsigned("clientreplay_queue", replay_queue.size()); - f->dump_unsigned("active_replay", mdcache->get_num_client_requests()); - f->close_section(); -} - -void MDSRankDispatcher::update_log_config() -{ - map log_to_monitors; - map log_to_syslog; - map log_channel; - map log_prio; - map log_to_graylog; - map log_to_graylog_host; - map log_to_graylog_port; - uuid_d fsid; - string host; - - if (parse_log_client_options(g_ceph_context, log_to_monitors, log_to_syslog, - log_channel, log_prio, log_to_graylog, - log_to_graylog_host, log_to_graylog_port, - fsid, host) == 0) - clog->update_config(log_to_monitors, log_to_syslog, - log_channel, log_prio, log_to_graylog, - log_to_graylog_host, log_to_graylog_port, - fsid, host); - dout(10) << __func__ << " log_to_monitors " << log_to_monitors << dendl; -} - -void MDSRank::create_logger() -{ - dout(10) << "create_logger" << dendl; - { - PerfCountersBuilder mds_plb(g_ceph_context, "mds", l_mds_first, l_mds_last); - - mds_plb.add_u64_counter( - l_mds_request, "request", "Requests", "req", - PerfCountersBuilder::PRIO_CRITICAL); - mds_plb.add_u64_counter(l_mds_reply, "reply", "Replies"); - mds_plb.add_time_avg( - l_mds_reply_latency, "reply_latency", "Reply latency", "rlat", - PerfCountersBuilder::PRIO_CRITICAL); - mds_plb.add_u64_counter( - l_mds_forward, "forward", "Forwarding request", "fwd", - PerfCountersBuilder::PRIO_INTERESTING); - mds_plb.add_u64_counter(l_mds_dir_fetch, "dir_fetch", "Directory fetch"); - mds_plb.add_u64_counter(l_mds_dir_commit, "dir_commit", "Directory commit"); - mds_plb.add_u64_counter(l_mds_dir_split, "dir_split", "Directory split"); - mds_plb.add_u64_counter(l_mds_dir_merge, "dir_merge", "Directory merge"); - - mds_plb.add_u64(l_mds_inode_max, "inode_max", "Max inodes, cache size"); - mds_plb.add_u64(l_mds_inodes, "inodes", "Inodes", "inos", - PerfCountersBuilder::PRIO_CRITICAL); - mds_plb.add_u64(l_mds_inodes_top, "inodes_top", "Inodes on top"); - mds_plb.add_u64(l_mds_inodes_bottom, "inodes_bottom", "Inodes on bottom"); - mds_plb.add_u64( - l_mds_inodes_pin_tail, "inodes_pin_tail", "Inodes on pin tail"); - mds_plb.add_u64(l_mds_inodes_pinned, "inodes_pinned", "Inodes pinned"); - mds_plb.add_u64(l_mds_inodes_expired, "inodes_expired", "Inodes expired"); - mds_plb.add_u64( - l_mds_inodes_with_caps, "inodes_with_caps", "Inodes with capabilities"); - mds_plb.add_u64(l_mds_caps, "caps", "Capabilities", "caps", - PerfCountersBuilder::PRIO_INTERESTING); - mds_plb.add_u64(l_mds_subtrees, "subtrees", "Subtrees"); - - mds_plb.add_u64_counter(l_mds_traverse, "traverse", "Traverses"); - mds_plb.add_u64_counter(l_mds_traverse_hit, "traverse_hit", "Traverse hits"); - mds_plb.add_u64_counter(l_mds_traverse_forward, "traverse_forward", - "Traverse forwards"); - mds_plb.add_u64_counter(l_mds_traverse_discover, "traverse_discover", - "Traverse directory discovers"); - mds_plb.add_u64_counter(l_mds_traverse_dir_fetch, "traverse_dir_fetch", - "Traverse incomplete directory content fetchings"); - mds_plb.add_u64_counter(l_mds_traverse_remote_ino, "traverse_remote_ino", - "Traverse remote dentries"); - mds_plb.add_u64_counter(l_mds_traverse_lock, "traverse_lock", - "Traverse locks"); - - mds_plb.add_u64(l_mds_load_cent, "load_cent", "Load per cent"); - mds_plb.add_u64(l_mds_dispatch_queue_len, "q", "Dispatch queue length"); - - mds_plb.add_u64_counter(l_mds_exported, "exported", "Exports"); - mds_plb.add_u64_counter( - l_mds_exported_inodes, "exported_inodes", "Exported inodes", "exi", - PerfCountersBuilder::PRIO_INTERESTING); - mds_plb.add_u64_counter(l_mds_imported, "imported", "Imports"); - mds_plb.add_u64_counter( - l_mds_imported_inodes, "imported_inodes", "Imported inodes", "imi", - PerfCountersBuilder::PRIO_INTERESTING); - logger = mds_plb.create_perf_counters(); - g_ceph_context->get_perfcounters_collection()->add(logger); - } - - { - PerfCountersBuilder mdm_plb(g_ceph_context, "mds_mem", l_mdm_first, l_mdm_last); - mdm_plb.add_u64(l_mdm_ino, "ino", "Inodes"); - mdm_plb.add_u64_counter(l_mdm_inoa, "ino+", "Inodes opened"); - mdm_plb.add_u64_counter(l_mdm_inos, "ino-", "Inodes closed"); - mdm_plb.add_u64(l_mdm_dir, "dir", "Directories"); - mdm_plb.add_u64_counter(l_mdm_dira, "dir+", "Directories opened"); - mdm_plb.add_u64_counter(l_mdm_dirs, "dir-", "Directories closed"); - mdm_plb.add_u64(l_mdm_dn, "dn", "Dentries"); - mdm_plb.add_u64_counter(l_mdm_dna, "dn+", "Dentries opened"); - mdm_plb.add_u64_counter(l_mdm_dns, "dn-", "Dentries closed"); - mdm_plb.add_u64(l_mdm_cap, "cap", "Capabilities"); - mdm_plb.add_u64_counter(l_mdm_capa, "cap+", "Capabilities added"); - mdm_plb.add_u64_counter(l_mdm_caps, "cap-", "Capabilities removed"); - mdm_plb.add_u64(l_mdm_rss, "rss", "RSS"); - mdm_plb.add_u64(l_mdm_heap, "heap", "Heap size"); - mdm_plb.add_u64(l_mdm_buf, "buf", "Buffer size"); - mlogger = mdm_plb.create_perf_counters(); - g_ceph_context->get_perfcounters_collection()->add(mlogger); - } - - mdlog->create_logger(); - server->create_logger(); - purge_queue.create_logger(); - sessionmap.register_perfcounters(); - mdcache->register_perfcounters(); -} - -void MDSRank::check_ops_in_flight() -{ - vector warnings; - int slow = 0; - if (op_tracker.check_ops_in_flight(warnings, &slow)) { - for (vector::iterator i = warnings.begin(); - i != warnings.end(); - ++i) { - clog->warn() << *i; - } - } - - // set mds slow request count - mds_slow_req_count = slow; - return; -} - -void MDSRankDispatcher::handle_osd_map() -{ - if (is_active() && snapserver) { - snapserver->check_osd_map(true); - } - - server->handle_osd_map(); - - purge_queue.update_op_limit(*mdsmap); - - std::set newly_blacklisted; - objecter->consume_blacklist_events(&newly_blacklisted); - auto epoch = objecter->with_osdmap([](const OSDMap &o){return o.get_epoch();}); - dout(4) << "handle_osd_map epoch " << epoch << ", " - << newly_blacklisted.size() << " new blacklist entries" << dendl; - auto victims = server->apply_blacklist(newly_blacklisted); - if (victims) { - set_osd_epoch_barrier(epoch); - } - - - // By default the objecter only requests OSDMap updates on use, - // we would like to always receive the latest maps in order to - // apply policy based on the FULL flag. - objecter->maybe_request_map(); -} - -bool MDSRank::evict_client(int64_t session_id, - bool wait, bool blacklist, std::stringstream& err_ss, - Context *on_killed) -{ - assert(mds_lock.is_locked_by_me()); - - // Mutually exclusive args - assert(!(wait && on_killed != nullptr)); - - if (is_any_replay()) { - err_ss << "MDS is replaying log"; - return false; - } - - Session *session = sessionmap.get_session( - entity_name_t(CEPH_ENTITY_TYPE_CLIENT, session_id)); - if (!session) { - err_ss << "session " << session_id << " not in sessionmap!"; - return false; - } - - dout(4) << "Preparing blacklist command... (wait=" << wait << ")" << dendl; - stringstream ss; - ss << "{\"prefix\":\"osd blacklist\", \"blacklistop\":\"add\","; - ss << "\"addr\":\""; - ss << session->info.inst.addr; - ss << "\"}"; - std::string tmp = ss.str(); - std::vector cmd = {tmp}; - - auto kill_mds_session = [this, session_id, on_killed](){ - assert(mds_lock.is_locked_by_me()); - Session *session = sessionmap.get_session( - entity_name_t(CEPH_ENTITY_TYPE_CLIENT, session_id)); - if (session) { - if (on_killed) { - server->kill_session(session, on_killed); - } else { - C_SaferCond on_safe; - server->kill_session(session, &on_safe); - - mds_lock.Unlock(); - on_safe.wait(); - mds_lock.Lock(); - } - } else { - dout(1) << "session " << session_id << " was removed while we waited " - "for blacklist" << dendl; - - // Even though it wasn't us that removed it, kick our completion - // as the session has been removed. - if (on_killed) { - on_killed->complete(0); - } - } - }; - - auto background_blacklist = [this, session_id, cmd](std::function fn){ - assert(mds_lock.is_locked_by_me()); - - Context *on_blacklist_done = new FunctionContext([this, session_id, fn](int r) { - objecter->wait_for_latest_osdmap( - new C_OnFinisher( - new FunctionContext([this, session_id, fn](int r) { - Mutex::Locker l(mds_lock); - auto epoch = objecter->with_osdmap([](const OSDMap &o){ - return o.get_epoch(); - }); - - set_osd_epoch_barrier(epoch); - - fn(); - }), finisher) - ); - }); - - dout(4) << "Sending mon blacklist command: " << cmd[0] << dendl; - monc->start_mon_command(cmd, {}, nullptr, nullptr, on_blacklist_done); - }; - - auto blocking_blacklist = [this, cmd, &err_ss, background_blacklist](){ - C_SaferCond inline_ctx; - background_blacklist([&inline_ctx](){inline_ctx.complete(0);}); - mds_lock.Unlock(); - inline_ctx.wait(); - mds_lock.Lock(); - }; - - if (wait) { - if (blacklist) { - blocking_blacklist(); - } - - // We dropped mds_lock, so check that session still exists - session = sessionmap.get_session(entity_name_t(CEPH_ENTITY_TYPE_CLIENT, - session_id)); - if (!session) { - dout(1) << "session " << session_id << " was removed while we waited " - "for blacklist" << dendl; - return true; - } - kill_mds_session(); - } else { - if (blacklist) { - background_blacklist(kill_mds_session); - } else { - kill_mds_session(); - } - } - - return true; -} - -void MDSRank::bcast_mds_map() -{ - dout(7) << "bcast_mds_map " << mdsmap->get_epoch() << dendl; - - // share the map with mounted clients - set clients; - sessionmap.get_client_session_set(clients); - for (set::const_iterator p = clients.begin(); - p != clients.end(); - ++p) - (*p)->connection->send_message(new MMDSMap(monc->get_fsid(), mdsmap)); - last_client_mdsmap_bcast = mdsmap->get_epoch(); -} - -MDSRankDispatcher::MDSRankDispatcher( - mds_rank_t whoami_, - Mutex &mds_lock_, - LogChannelRef &clog_, - SafeTimer &timer_, - Beacon &beacon_, - MDSMap *& mdsmap_, - Messenger *msgr, - MonClient *monc_, - Context *respawn_hook_, - Context *suicide_hook_) - : MDSRank(whoami_, mds_lock_, clog_, timer_, beacon_, mdsmap_, - msgr, monc_, respawn_hook_, suicide_hook_) -{} - -bool MDSRankDispatcher::handle_command( - const cmdmap_t &cmdmap, - MCommand *m, - int *r, - std::stringstream *ds, - std::stringstream *ss, - bool *need_reply) -{ - assert(r != nullptr); - assert(ds != nullptr); - assert(ss != nullptr); - - *need_reply = true; - - std::string prefix; - cmd_getval(g_ceph_context, cmdmap, "prefix", prefix); - - if (prefix == "session ls" || prefix == "client ls") { - std::vector filter_args; - cmd_getval(g_ceph_context, cmdmap, "filters", filter_args); - - SessionFilter filter; - *r = filter.parse(filter_args, ss); - if (*r != 0) { - return true; - } - - Formatter *f = new JSONFormatter(true); - dump_sessions(filter, f); - f->flush(*ds); - delete f; - return true; - } else if (prefix == "session evict" || prefix == "client evict") { - std::vector filter_args; - cmd_getval(g_ceph_context, cmdmap, "filters", filter_args); - - SessionFilter filter; - *r = filter.parse(filter_args, ss); - if (*r != 0) { - return true; - } - - evict_clients(filter, m); - - *need_reply = false; - return true; - } else if (prefix == "damage ls") { - Formatter *f = new JSONFormatter(true); - damage_table.dump(f); - f->flush(*ds); - delete f; - return true; - } else if (prefix == "damage rm") { - damage_entry_id_t id = 0; - bool got = cmd_getval(g_ceph_context, cmdmap, "damage_id", (int64_t&)id); - if (!got) { - *r = -EINVAL; - return true; - } - - damage_table.erase(id); - return true; - } else { - return false; - } -} - -epoch_t MDSRank::get_osd_epoch() const -{ - return objecter->with_osdmap(std::mem_fn(&OSDMap::get_epoch)); -} -