--- /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 "FSMap.h"
+
+#include <sstream>
+using std::stringstream;
+
+#include "mon/health_check.h"
+
+
+void Filesystem::dump(Formatter *f) const
+{
+ f->open_object_section("mdsmap");
+ mds_map.dump(f);
+ f->close_section();
+ f->dump_int("id", fscid);
+}
+
+void FSMap::dump(Formatter *f) const
+{
+ f->dump_int("epoch", epoch);
+
+ f->open_object_section("compat");
+ compat.dump(f);
+ f->close_section();
+
+ f->open_object_section("feature_flags");
+ f->dump_bool("enable_multiple", enable_multiple);
+ f->dump_bool("ever_enabled_multiple", ever_enabled_multiple);
+ f->close_section();
+
+ f->open_array_section("standbys");
+ for (const auto &i : standby_daemons) {
+ f->open_object_section("info");
+ i.second.dump(f);
+ f->dump_int("epoch", standby_epochs.at(i.first));
+ f->close_section();
+ }
+ f->close_section();
+
+ f->open_array_section("filesystems");
+ for (const auto &fs : filesystems) {
+ f->open_object_section("filesystem");
+ fs.second->dump(f);
+ f->close_section();
+ }
+ f->close_section();
+}
+
+void FSMap::generate_test_instances(list<FSMap*>& ls)
+{
+ FSMap *m = new FSMap();
+
+ std::list<MDSMap*> mds_map_instances;
+ MDSMap::generate_test_instances(mds_map_instances);
+
+ int k = 20;
+ for (auto i : mds_map_instances) {
+ auto fs = std::make_shared<Filesystem>();
+ fs->fscid = k++;
+ fs->mds_map = *i;
+ delete i;
+ m->filesystems[fs->fscid] = fs;
+ }
+ mds_map_instances.clear();
+
+ ls.push_back(m);
+}
+
+void FSMap::print(ostream& out) const
+{
+ out << "e" << epoch << std::endl;
+ out << "enable_multiple, ever_enabled_multiple: " << enable_multiple << ","
+ << ever_enabled_multiple << std::endl;
+ out << "compat: " << compat << std::endl;
+ out << "legacy client fscid: " << legacy_client_fscid << std::endl;
+ out << " " << std::endl;
+
+ if (filesystems.empty()) {
+ out << "No filesystems configured" << std::endl;
+ return;
+ }
+
+ for (const auto &fs : filesystems) {
+ fs.second->print(out);
+ out << " " << std::endl << " " << std::endl; // Space out a bit
+ }
+
+ if (!standby_daemons.empty()) {
+ out << "Standby daemons:" << std::endl << " " << std::endl;
+ }
+
+ for (const auto &p : standby_daemons) {
+ p.second.print_summary(out);
+ out << std::endl;
+ }
+}
+
+
+
+void FSMap::print_summary(Formatter *f, ostream *out) const
+{
+ map<mds_role_t,string> by_rank;
+ map<string,int> by_state;
+
+ if (f) {
+ f->dump_unsigned("epoch", get_epoch());
+ for (auto i : filesystems) {
+ auto fs = i.second;
+ f->dump_unsigned("id", fs->fscid);
+ f->dump_unsigned("up", fs->mds_map.up.size());
+ f->dump_unsigned("in", fs->mds_map.in.size());
+ f->dump_unsigned("max", fs->mds_map.max_mds);
+ }
+ } else {
+ for (auto i : filesystems) {
+ auto fs = i.second;
+ *out << fs->mds_map.fs_name << "-" << fs->mds_map.up.size() << "/"
+ << fs->mds_map.in.size() << "/" << fs->mds_map.max_mds << " up ";
+ }
+ }
+
+ if (f) {
+ f->open_array_section("by_rank");
+ }
+
+ const auto all_info = get_mds_info();
+ for (const auto &p : all_info) {
+ const auto &info = p.second;
+ string s = ceph_mds_state_name(info.state);
+ if (info.laggy()) {
+ s += "(laggy or crashed)";
+ }
+
+ const fs_cluster_id_t fscid = mds_roles.at(info.global_id);
+
+ if (info.rank != MDS_RANK_NONE &&
+ info.state != MDSMap::STATE_STANDBY_REPLAY) {
+ if (f) {
+ f->open_object_section("mds");
+ f->dump_unsigned("filesystem_id", fscid);
+ f->dump_unsigned("rank", info.rank);
+ f->dump_string("name", info.name);
+ f->dump_string("status", s);
+ f->close_section();
+ } else {
+ by_rank[mds_role_t(fscid, info.rank)] = info.name + "=" + s;
+ }
+ } else {
+ by_state[s]++;
+ }
+ }
+
+ if (f) {
+ f->close_section();
+ } else {
+ if (!by_rank.empty()) {
+ if (filesystems.size() > 1) {
+ // Disambiguate filesystems
+ std::map<std::string, std::string> pretty;
+ for (auto i : by_rank) {
+ const auto &fs_name = filesystems.at(i.first.fscid)->mds_map.fs_name;
+ std::ostringstream o;
+ o << "[" << fs_name << ":" << i.first.rank << "]";
+ pretty[o.str()] = i.second;
+ }
+ *out << " " << pretty;
+ } else {
+ // Omit FSCID in output when only one filesystem exists
+ std::map<mds_rank_t, std::string> shortened;
+ for (auto i : by_rank) {
+ shortened[i.first.rank] = i.second;
+ }
+ *out << " " << shortened;
+ }
+ }
+ }
+
+ for (map<string,int>::reverse_iterator p = by_state.rbegin(); p != by_state.rend(); ++p) {
+ if (f) {
+ f->dump_unsigned(p->first.c_str(), p->second);
+ } else {
+ *out << ", " << p->second << " " << p->first;
+ }
+ }
+
+ size_t failed = 0;
+ size_t damaged = 0;
+ for (auto i : filesystems) {
+ auto fs = i.second;
+ failed += fs->mds_map.failed.size();
+ damaged += fs->mds_map.damaged.size();
+ }
+
+ if (failed > 0) {
+ if (f) {
+ f->dump_unsigned("failed", failed);
+ } else {
+ *out << ", " << failed << " failed";
+ }
+ }
+
+ if (damaged > 0) {
+ if (f) {
+ f->dump_unsigned("damaged", damaged);
+ } else {
+ *out << ", " << damaged << " damaged";
+ }
+ }
+ //if (stopped.size())
+ //out << ", " << stopped.size() << " stopped";
+}
+
+
+void FSMap::create_filesystem(const std::string &name,
+ int64_t metadata_pool, int64_t data_pool,
+ uint64_t features)
+{
+ auto fs = std::make_shared<Filesystem>();
+ fs->mds_map.fs_name = name;
+ fs->mds_map.max_mds = 1;
+ fs->mds_map.data_pools.push_back(data_pool);
+ fs->mds_map.metadata_pool = metadata_pool;
+ fs->mds_map.cas_pool = -1;
+ fs->mds_map.max_file_size = g_conf->mds_max_file_size;
+ fs->mds_map.compat = compat;
+ fs->mds_map.created = ceph_clock_now();
+ fs->mds_map.modified = ceph_clock_now();
+ fs->mds_map.session_timeout = g_conf->mds_session_timeout;
+ fs->mds_map.session_autoclose = g_conf->mds_session_autoclose;
+ fs->mds_map.enabled = true;
+ if (features & CEPH_FEATURE_SERVER_JEWEL) {
+ fs->fscid = next_filesystem_id++;
+ // ANONYMOUS is only for upgrades from legacy mdsmaps, we should
+ // have initialized next_filesystem_id such that it's never used here.
+ assert(fs->fscid != FS_CLUSTER_ID_ANONYMOUS);
+ } else {
+ // Use anon fscid because this will get thrown away when encoding
+ // as legacy MDSMap for legacy mons.
+ assert(filesystems.empty());
+ fs->fscid = FS_CLUSTER_ID_ANONYMOUS;
+ }
+ filesystems[fs->fscid] = fs;
+
+ // Created first filesystem? Set it as the one
+ // for legacy clients to use
+ if (filesystems.size() == 1) {
+ legacy_client_fscid = fs->fscid;
+ }
+}
+
+void FSMap::reset_filesystem(fs_cluster_id_t fscid)
+{
+ auto fs = get_filesystem(fscid);
+ auto new_fs = std::make_shared<Filesystem>();
+
+ // Populate rank 0 as existing (so don't go into CREATING)
+ // but failed (so that next available MDS is assigned the rank)
+ new_fs->mds_map.in.insert(mds_rank_t(0));
+ new_fs->mds_map.failed.insert(mds_rank_t(0));
+
+ // Carry forward what makes sense
+ new_fs->fscid = fs->fscid;
+ new_fs->mds_map.inline_data_enabled = fs->mds_map.inline_data_enabled;
+ new_fs->mds_map.max_mds = 1;
+ new_fs->mds_map.data_pools = fs->mds_map.data_pools;
+ new_fs->mds_map.metadata_pool = fs->mds_map.metadata_pool;
+ new_fs->mds_map.cas_pool = fs->mds_map.cas_pool;
+ new_fs->mds_map.fs_name = fs->mds_map.fs_name;
+ new_fs->mds_map.max_file_size = g_conf->mds_max_file_size;
+ new_fs->mds_map.compat = compat;
+ new_fs->mds_map.created = ceph_clock_now();
+ new_fs->mds_map.modified = ceph_clock_now();
+ new_fs->mds_map.session_timeout = g_conf->mds_session_timeout;
+ new_fs->mds_map.session_autoclose = g_conf->mds_session_autoclose;
+ new_fs->mds_map.standby_count_wanted = fs->mds_map.standby_count_wanted;
+ new_fs->mds_map.enabled = true;
+
+ // Remember mds ranks that have ever started. (They should load old inotable
+ // instead of creating new one if they start again.)
+ new_fs->mds_map.stopped.insert(fs->mds_map.in.begin(), fs->mds_map.in.end());
+ new_fs->mds_map.stopped.insert(fs->mds_map.stopped.begin(), fs->mds_map.stopped.end());
+ new_fs->mds_map.stopped.erase(mds_rank_t(0));
+
+ // Persist the new FSMap
+ filesystems[new_fs->fscid] = new_fs;
+}
+
+void FSMap::get_health(list<pair<health_status_t,string> >& summary,
+ list<pair<health_status_t,string> > *detail) const
+{
+ mds_rank_t standby_count_wanted = 0;
+ for (const auto &i : filesystems) {
+ const auto &fs = i.second;
+
+ // TODO: move get_health up into here so that we can qualify
+ // all the messages with what filesystem they're talking about
+ fs->mds_map.get_health(summary, detail);
+
+ standby_count_wanted = std::max(standby_count_wanted, fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size()));
+ }
+
+ if (standby_count_wanted) {
+ std::ostringstream oss;
+ oss << "insufficient standby daemons available: have " << standby_daemons.size() << "; want " << standby_count_wanted << " more";
+ summary.push_back(make_pair(HEALTH_WARN, oss.str()));
+ }
+}
+
+bool FSMap::check_health(void)
+{
+ bool changed = false;
+ for (auto &i : filesystems) {
+ changed |= i.second->mds_map.check_health((mds_rank_t)standby_daemons.size());
+ }
+ return changed;
+}
+
+void FSMap::get_health_checks(health_check_map_t *checks) const
+{
+ mds_rank_t standby_count_wanted = 0;
+ for (const auto &i : filesystems) {
+ const auto &fs = i.second;
+ health_check_map_t fschecks;
+
+ fs->mds_map.get_health_checks(&fschecks);
+
+ // Some of the failed ranks might be transient (i.e. there are standbys
+ // ready to replace them). We will report only on "stuck" failed, i.e.
+ // ranks which are failed and have no standby replacement available.
+ std::set<mds_rank_t> stuck_failed;
+
+ for (const auto &rank : fs->mds_map.failed) {
+ const mds_gid_t replacement = find_replacement_for(
+ {fs->fscid, rank}, {}, g_conf->mon_force_standby_active);
+ if (replacement == MDS_GID_NONE) {
+ stuck_failed.insert(rank);
+ }
+ }
+
+ // FS_WITH_FAILED_MDS
+ if (!stuck_failed.empty()) {
+ health_check_t& fscheck = checks->get_or_add(
+ "FS_WITH_FAILED_MDS", HEALTH_WARN,
+ "%num% filesystem%plurals% %hasorhave% a failed mds daemon");
+ ostringstream ss;
+ ss << "fs " << fs->mds_map.fs_name << " has " << stuck_failed.size()
+ << " failed mds" << (stuck_failed.size() > 1 ? "s" : "");
+ fscheck.detail.push_back(ss.str()); }
+
+ checks->merge(fschecks);
+ standby_count_wanted = std::max(
+ standby_count_wanted,
+ fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size()));
+ }
+
+ // MDS_INSUFFICIENT_STANDBY
+ if (standby_count_wanted) {
+ std::ostringstream oss, dss;
+ oss << "insufficient standby MDS daemons available";
+ auto& d = checks->get_or_add("MDS_INSUFFICIENT_STANDBY", HEALTH_WARN, oss.str());
+ dss << "have " << standby_daemons.size() << "; want " << standby_count_wanted
+ << " more";
+ d.detail.push_back(dss.str());
+ }
+}
+
+void FSMap::encode(bufferlist& bl, uint64_t features) const
+{
+ if (features & CEPH_FEATURE_SERVER_JEWEL) {
+ ENCODE_START(7, 6, bl);
+ ::encode(epoch, bl);
+ ::encode(next_filesystem_id, bl);
+ ::encode(legacy_client_fscid, bl);
+ ::encode(compat, bl);
+ ::encode(enable_multiple, bl);
+ std::vector<Filesystem> fs_list;
+ for (auto i : filesystems) {
+ fs_list.push_back(*(i.second));
+ }
+ ::encode(fs_list, bl, features);
+ ::encode(mds_roles, bl);
+ ::encode(standby_daemons, bl, features);
+ ::encode(standby_epochs, bl);
+ ::encode(ever_enabled_multiple, bl);
+ ENCODE_FINISH(bl);
+ } else {
+ if (filesystems.empty()) {
+ MDSMap disabled_map;
+ disabled_map.epoch = epoch;
+ disabled_map.encode(bl, features);
+ } else {
+ // MDSMonitor should never have created multiple filesystems
+ // until the quorum features indicated Jewel
+ assert(filesystems.size() == 1);
+ auto fs = filesystems.begin()->second;
+
+ // Take the MDSMap for the enabled filesystem, and populated its
+ // mds_info with the standbys to get a pre-jewel-style mon MDSMap.
+ MDSMap full_mdsmap = fs->mds_map;
+ full_mdsmap.epoch = epoch;
+ for (const auto &p : standby_daemons) {
+ full_mdsmap.mds_info[p.first] = p.second;
+ }
+
+ // Old MDSMaps don't set rank on standby replay daemons
+ for (auto &i : full_mdsmap.mds_info) {
+ auto &info = i.second;
+ if (info.state == MDSMap::STATE_STANDBY_REPLAY) {
+ info.rank = MDS_RANK_NONE;
+ }
+ }
+
+ full_mdsmap.encode(bl, features);
+ }
+ }
+}
+
+void FSMap::decode(bufferlist::iterator& p)
+{
+ // The highest MDSMap encoding version before we changed the
+ // MDSMonitor to store an FSMap instead of an MDSMap was
+ // 5, so anything older than 6 is decoded as an MDSMap,
+ // and anything newer is decoded as an FSMap.
+ DECODE_START_LEGACY_COMPAT_LEN_16(7, 4, 4, p);
+ if (struct_v < 6) {
+ // Because the mon used to store an MDSMap where we now
+ // store an FSMap, FSMap knows how to decode the legacy
+ // MDSMap format (it never needs to encode it though).
+ MDSMap legacy_mds_map;
+
+ // Decoding an MDSMap (upgrade)
+ ::decode(epoch, p);
+ ::decode(legacy_mds_map.flags, p);
+ ::decode(legacy_mds_map.last_failure, p);
+ ::decode(legacy_mds_map.root, p);
+ ::decode(legacy_mds_map.session_timeout, p);
+ ::decode(legacy_mds_map.session_autoclose, p);
+ ::decode(legacy_mds_map.max_file_size, p);
+ ::decode(legacy_mds_map.max_mds, p);
+ ::decode(legacy_mds_map.mds_info, p);
+ if (struct_v < 3) {
+ __u32 n;
+ ::decode(n, p);
+ while (n--) {
+ __u32 m;
+ ::decode(m, p);
+ legacy_mds_map.data_pools.push_back(m);
+ }
+ __s32 s;
+ ::decode(s, p);
+ legacy_mds_map.cas_pool = s;
+ } else {
+ ::decode(legacy_mds_map.data_pools, p);
+ ::decode(legacy_mds_map.cas_pool, p);
+ }
+
+ // kclient ignores everything from here
+ __u16 ev = 1;
+ if (struct_v >= 2)
+ ::decode(ev, p);
+ if (ev >= 3)
+ ::decode(legacy_mds_map.compat, p);
+ else
+ legacy_mds_map.compat = get_mdsmap_compat_set_base();
+ if (ev < 5) {
+ __u32 n;
+ ::decode(n, p);
+ legacy_mds_map.metadata_pool = n;
+ } else {
+ ::decode(legacy_mds_map.metadata_pool, p);
+ }
+ ::decode(legacy_mds_map.created, p);
+ ::decode(legacy_mds_map.modified, p);
+ ::decode(legacy_mds_map.tableserver, p);
+ ::decode(legacy_mds_map.in, p);
+ std::map<mds_rank_t,int32_t> inc; // Legacy field, parse and drop
+ ::decode(inc, p);
+ ::decode(legacy_mds_map.up, p);
+ ::decode(legacy_mds_map.failed, p);
+ ::decode(legacy_mds_map.stopped, p);
+ if (ev >= 4)
+ ::decode(legacy_mds_map.last_failure_osd_epoch, p);
+ if (ev >= 6) {
+ if (ev < 10) {
+ // previously this was a bool about snaps, not a flag map
+ bool flag;
+ ::decode(flag, p);
+ legacy_mds_map.ever_allowed_features = flag ?
+ CEPH_MDSMAP_ALLOW_SNAPS : 0;
+ ::decode(flag, p);
+ legacy_mds_map.explicitly_allowed_features = flag ?
+ CEPH_MDSMAP_ALLOW_SNAPS : 0;
+ if (legacy_mds_map.max_mds > 1) {
+ legacy_mds_map.set_multimds_allowed();
+ }
+ } else {
+ ::decode(legacy_mds_map.ever_allowed_features, p);
+ ::decode(legacy_mds_map.explicitly_allowed_features, p);
+ }
+ } else {
+ legacy_mds_map.ever_allowed_features = CEPH_MDSMAP_ALLOW_CLASSICS;
+ legacy_mds_map.explicitly_allowed_features = 0;
+ if (legacy_mds_map.max_mds > 1) {
+ legacy_mds_map.set_multimds_allowed();
+ }
+ }
+ if (ev >= 7)
+ ::decode(legacy_mds_map.inline_data_enabled, p);
+
+ if (ev >= 8) {
+ assert(struct_v >= 5);
+ ::decode(legacy_mds_map.enabled, p);
+ ::decode(legacy_mds_map.fs_name, p);
+ } else {
+ legacy_mds_map.fs_name = "default";
+ if (epoch > 1) {
+ // If an MDS has ever been started, epoch will be greater than 1,
+ // assume filesystem is enabled.
+ legacy_mds_map.enabled = true;
+ } else {
+ // Upgrading from a cluster that never used an MDS, switch off
+ // filesystem until it's explicitly enabled.
+ legacy_mds_map.enabled = false;
+ }
+ }
+
+ if (ev >= 9) {
+ ::decode(legacy_mds_map.damaged, p);
+ }
+
+ // We're upgrading, populate filesystems from the legacy fields
+ filesystems.clear();
+ standby_daemons.clear();
+ standby_epochs.clear();
+ mds_roles.clear();
+ compat = legacy_mds_map.compat;
+ enable_multiple = false;
+
+ // Synthesise a Filesystem from legacy_mds_map, if enabled
+ if (legacy_mds_map.enabled) {
+ // Construct a Filesystem from the legacy MDSMap
+ auto migrate_fs = std::make_shared<Filesystem>();
+ migrate_fs->fscid = FS_CLUSTER_ID_ANONYMOUS;
+ migrate_fs->mds_map = legacy_mds_map;
+ migrate_fs->mds_map.epoch = epoch;
+ filesystems[migrate_fs->fscid] = migrate_fs;
+
+ // List of GIDs that had invalid states
+ std::set<mds_gid_t> drop_gids;
+
+ // Construct mds_roles, standby_daemons, and remove
+ // standbys from the MDSMap in the Filesystem.
+ for (auto &p : migrate_fs->mds_map.mds_info) {
+ if (p.second.state == MDSMap::STATE_STANDBY_REPLAY) {
+ // In legacy MDSMap, standby replay daemons don't have
+ // rank set, but since FSMap they do.
+ p.second.rank = p.second.standby_for_rank;
+ }
+ if (p.second.rank == MDS_RANK_NONE) {
+ if (p.second.state != MDSMap::STATE_STANDBY) {
+ // Old MDSMaps can have down:dne here, which
+ // is invalid in an FSMap (#17837)
+ drop_gids.insert(p.first);
+ } else {
+ insert(p.second); // into standby_daemons
+ }
+ } else {
+ mds_roles[p.first] = migrate_fs->fscid;
+ }
+ }
+ for (const auto &p : standby_daemons) {
+ // Erase from this Filesystem's MDSMap, because it has
+ // been copied into FSMap::Standby_daemons above
+ migrate_fs->mds_map.mds_info.erase(p.first);
+ }
+ for (const auto &gid : drop_gids) {
+ // Throw away all info for this MDS because it was identified
+ // as having invalid state above.
+ migrate_fs->mds_map.mds_info.erase(gid);
+ }
+
+ legacy_client_fscid = migrate_fs->fscid;
+ } else {
+ legacy_client_fscid = FS_CLUSTER_ID_NONE;
+ }
+ } else {
+ ::decode(epoch, p);
+ ::decode(next_filesystem_id, p);
+ ::decode(legacy_client_fscid, p);
+ ::decode(compat, p);
+ ::decode(enable_multiple, p);
+ std::vector<Filesystem> fs_list;
+ ::decode(fs_list, p);
+ filesystems.clear();
+ for (std::vector<Filesystem>::const_iterator fs = fs_list.begin(); fs != fs_list.end(); ++fs) {
+ filesystems[fs->fscid] = std::make_shared<Filesystem>(*fs);
+ }
+
+ ::decode(mds_roles, p);
+ ::decode(standby_daemons, p);
+ ::decode(standby_epochs, p);
+ if (struct_v >= 7) {
+ ::decode(ever_enabled_multiple, p);
+ }
+ }
+
+ DECODE_FINISH(p);
+}
+
+void FSMap::sanitize(std::function<bool(int64_t pool)> pool_exists)
+{
+ for (auto &fs : filesystems) {
+ fs.second->mds_map.sanitize(pool_exists);
+ }
+}
+
+void Filesystem::encode(bufferlist& bl, uint64_t features) const
+{
+ ENCODE_START(1, 1, bl);
+ ::encode(fscid, bl);
+ bufferlist mdsmap_bl;
+ mds_map.encode(mdsmap_bl, features);
+ ::encode(mdsmap_bl, bl);
+ ENCODE_FINISH(bl);
+}
+
+void Filesystem::decode(bufferlist::iterator& p)
+{
+ DECODE_START(1, p);
+ ::decode(fscid, p);
+ bufferlist mdsmap_bl;
+ ::decode(mdsmap_bl, p);
+ bufferlist::iterator mdsmap_bl_iter = mdsmap_bl.begin();
+ mds_map.decode(mdsmap_bl_iter);
+ DECODE_FINISH(p);
+}
+
+int FSMap::parse_filesystem(
+ std::string const &ns_str,
+ std::shared_ptr<const Filesystem> *result
+ ) const
+{
+ std::string ns_err;
+ fs_cluster_id_t fscid = strict_strtol(ns_str.c_str(), 10, &ns_err);
+ if (!ns_err.empty() || filesystems.count(fscid) == 0) {
+ for (auto &fs : filesystems) {
+ if (fs.second->mds_map.fs_name == ns_str) {
+ *result = std::const_pointer_cast<const Filesystem>(fs.second);
+ return 0;
+ }
+ }
+ return -ENOENT;
+ } else {
+ *result = get_filesystem(fscid);
+ return 0;
+ }
+}
+
+void Filesystem::print(std::ostream &out) const
+{
+ out << "Filesystem '" << mds_map.fs_name
+ << "' (" << fscid << ")" << std::endl;
+ mds_map.print(out);
+}
+
+mds_gid_t FSMap::find_standby_for(mds_role_t role, const std::string& name) const
+{
+ mds_gid_t result = MDS_GID_NONE;
+
+ // First see if we have a STANDBY_REPLAY
+ auto fs = get_filesystem(role.fscid);
+ for (const auto &i : fs->mds_map.mds_info) {
+ const auto &info = i.second;
+ if (info.rank == role.rank && info.state == MDSMap::STATE_STANDBY_REPLAY) {
+ return info.global_id;
+ }
+ }
+
+ // See if there are any STANDBY daemons available
+ for (const auto &i : standby_daemons) {
+ const auto &gid = i.first;
+ const auto &info = i.second;
+ assert(info.state == MDSMap::STATE_STANDBY);
+ assert(info.rank == MDS_RANK_NONE);
+
+ if (info.laggy()) {
+ continue;
+ }
+
+ // The mds_info_t may or may not tell us exactly which filesystem
+ // the standby_for_rank refers to: lookup via legacy_client_fscid
+ mds_role_t target_role = {
+ info.standby_for_fscid == FS_CLUSTER_ID_NONE ?
+ legacy_client_fscid : info.standby_for_fscid,
+ info.standby_for_rank};
+
+ if ((target_role.rank == role.rank && target_role.fscid == role.fscid)
+ || (name.length() && info.standby_for_name == name)) {
+ // It's a named standby for *me*, use it.
+ return gid;
+ } else if (
+ info.standby_for_rank < 0 && info.standby_for_name.length() == 0 &&
+ (info.standby_for_fscid == FS_CLUSTER_ID_NONE ||
+ info.standby_for_fscid == role.fscid)) {
+ // It's not a named standby for anyone, use it if we don't find
+ // a named standby for me later, unless it targets another FSCID.
+ result = gid;
+ }
+ }
+
+ return result;
+}
+
+mds_gid_t FSMap::find_unused_for(mds_role_t role,
+ bool force_standby_active) const {
+ for (const auto &i : standby_daemons) {
+ const auto &gid = i.first;
+ const auto &info = i.second;
+ assert(info.state == MDSMap::STATE_STANDBY);
+
+ if (info.laggy() || info.rank >= 0)
+ continue;
+
+ if (info.standby_for_fscid != FS_CLUSTER_ID_NONE &&
+ info.standby_for_fscid != role.fscid)
+ continue;
+ if (info.standby_for_rank != MDS_RANK_NONE &&
+ info.standby_for_rank != role.rank)
+ continue;
+
+ // To be considered 'unused' a daemon must either not
+ // be selected for standby-replay or the force_standby_active
+ // setting must be enabled to use replay daemons anyway.
+ if (!info.standby_replay || force_standby_active) {
+ return gid;
+ }
+ }
+ return MDS_GID_NONE;
+}
+
+mds_gid_t FSMap::find_replacement_for(mds_role_t role, const std::string& name,
+ bool force_standby_active) const {
+ const mds_gid_t standby = find_standby_for(role, name);
+ if (standby)
+ return standby;
+ else
+ return find_unused_for(role, force_standby_active);
+}
+
+void FSMap::sanity() const
+{
+ if (legacy_client_fscid != FS_CLUSTER_ID_NONE) {
+ assert(filesystems.count(legacy_client_fscid) == 1);
+ }
+
+ for (const auto &i : filesystems) {
+ auto fs = i.second;
+ assert(fs->mds_map.compat.compare(compat) == 0);
+ assert(fs->fscid == i.first);
+ for (const auto &j : fs->mds_map.mds_info) {
+ assert(j.second.rank != MDS_RANK_NONE);
+ assert(mds_roles.count(j.first) == 1);
+ assert(standby_daemons.count(j.first) == 0);
+ assert(standby_epochs.count(j.first) == 0);
+ assert(mds_roles.at(j.first) == i.first);
+ if (j.second.state != MDSMap::STATE_STANDBY_REPLAY) {
+ assert(fs->mds_map.up.at(j.second.rank) == j.first);
+ assert(fs->mds_map.failed.count(j.second.rank) == 0);
+ assert(fs->mds_map.damaged.count(j.second.rank) == 0);
+ }
+ }
+
+ for (const auto &j : fs->mds_map.up) {
+ mds_rank_t rank = j.first;
+ assert(fs->mds_map.in.count(rank) == 1);
+ mds_gid_t gid = j.second;
+ assert(fs->mds_map.mds_info.count(gid) == 1);
+ }
+ }
+
+ for (const auto &i : standby_daemons) {
+ assert(i.second.state == MDSMap::STATE_STANDBY);
+ assert(i.second.rank == MDS_RANK_NONE);
+ assert(i.second.global_id == i.first);
+ assert(standby_epochs.count(i.first) == 1);
+ assert(mds_roles.count(i.first) == 1);
+ assert(mds_roles.at(i.first) == FS_CLUSTER_ID_NONE);
+ }
+
+ for (const auto &i : standby_epochs) {
+ assert(standby_daemons.count(i.first) == 1);
+ }
+
+ for (const auto &i : mds_roles) {
+ if (i.second == FS_CLUSTER_ID_NONE) {
+ assert(standby_daemons.count(i.first) == 1);
+ } else {
+ assert(filesystems.count(i.second) == 1);
+ assert(filesystems.at(i.second)->mds_map.mds_info.count(i.first) == 1);
+ }
+ }
+}
+
+void FSMap::promote(
+ mds_gid_t standby_gid,
+ const std::shared_ptr<Filesystem> &filesystem,
+ mds_rank_t assigned_rank)
+{
+ assert(gid_exists(standby_gid));
+ bool is_standby_replay = mds_roles.at(standby_gid) != FS_CLUSTER_ID_NONE;
+ if (!is_standby_replay) {
+ assert(standby_daemons.count(standby_gid));
+ assert(standby_daemons.at(standby_gid).state == MDSMap::STATE_STANDBY);
+ }
+
+ MDSMap &mds_map = filesystem->mds_map;
+
+ // Insert daemon state to Filesystem
+ if (!is_standby_replay) {
+ mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid);
+ } else {
+ assert(mds_map.mds_info.count(standby_gid));
+ assert(mds_map.mds_info.at(standby_gid).state == MDSMap::STATE_STANDBY_REPLAY);
+ assert(mds_map.mds_info.at(standby_gid).rank == assigned_rank);
+ }
+ MDSMap::mds_info_t &info = mds_map.mds_info[standby_gid];
+
+ if (mds_map.stopped.erase(assigned_rank)) {
+ // The cluster is being expanded with a stopped rank
+ info.state = MDSMap::STATE_STARTING;
+ } else if (!mds_map.is_in(assigned_rank)) {
+ // The cluster is being expanded with a new rank
+ info.state = MDSMap::STATE_CREATING;
+ } else {
+ // An existing rank is being assigned to a replacement
+ info.state = MDSMap::STATE_REPLAY;
+ mds_map.failed.erase(assigned_rank);
+ }
+ info.rank = assigned_rank;
+ info.inc = epoch;
+ mds_roles[standby_gid] = filesystem->fscid;
+
+ // Update the rank state in Filesystem
+ mds_map.in.insert(assigned_rank);
+ mds_map.up[assigned_rank] = standby_gid;
+
+ // Remove from the list of standbys
+ if (!is_standby_replay) {
+ standby_daemons.erase(standby_gid);
+ standby_epochs.erase(standby_gid);
+ }
+
+ // Indicate that Filesystem has been modified
+ mds_map.epoch = epoch;
+}
+
+void FSMap::assign_standby_replay(
+ const mds_gid_t standby_gid,
+ const fs_cluster_id_t leader_ns,
+ const mds_rank_t leader_rank)
+{
+ assert(mds_roles.at(standby_gid) == FS_CLUSTER_ID_NONE);
+ assert(gid_exists(standby_gid));
+ assert(!gid_has_rank(standby_gid));
+ assert(standby_daemons.count(standby_gid));
+
+ // Insert to the filesystem
+ auto fs = filesystems.at(leader_ns);
+ fs->mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid);
+ fs->mds_map.mds_info[standby_gid].rank = leader_rank;
+ fs->mds_map.mds_info[standby_gid].state = MDSMap::STATE_STANDBY_REPLAY;
+ mds_roles[standby_gid] = leader_ns;
+
+ // Remove from the list of standbys
+ standby_daemons.erase(standby_gid);
+ standby_epochs.erase(standby_gid);
+
+ // Indicate that Filesystem has been modified
+ fs->mds_map.epoch = epoch;
+}
+
+void FSMap::erase(mds_gid_t who, epoch_t blacklist_epoch)
+{
+ if (mds_roles.at(who) == FS_CLUSTER_ID_NONE) {
+ standby_daemons.erase(who);
+ standby_epochs.erase(who);
+ } else {
+ auto &fs = filesystems.at(mds_roles.at(who));
+ const auto &info = fs->mds_map.mds_info.at(who);
+ if (info.state != MDSMap::STATE_STANDBY_REPLAY) {
+ if (info.state == MDSMap::STATE_CREATING) {
+ // If this gid didn't make it past CREATING, then forget
+ // the rank ever existed so that next time it's handed out
+ // to a gid it'll go back into CREATING.
+ fs->mds_map.in.erase(info.rank);
+ } else {
+ // Put this rank into the failed list so that the next available
+ // STANDBY will pick it up.
+ fs->mds_map.failed.insert(info.rank);
+ }
+ assert(fs->mds_map.up.at(info.rank) == info.global_id);
+ fs->mds_map.up.erase(info.rank);
+ }
+ fs->mds_map.mds_info.erase(who);
+ fs->mds_map.last_failure_osd_epoch = blacklist_epoch;
+ fs->mds_map.epoch = epoch;
+ }
+
+ mds_roles.erase(who);
+}
+
+void FSMap::damaged(mds_gid_t who, epoch_t blacklist_epoch)
+{
+ assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE);
+ auto fs = filesystems.at(mds_roles.at(who));
+ mds_rank_t rank = fs->mds_map.mds_info[who].rank;
+
+ erase(who, blacklist_epoch);
+ fs->mds_map.failed.erase(rank);
+ fs->mds_map.damaged.insert(rank);
+
+ assert(fs->mds_map.epoch == epoch);
+}
+
+/**
+ * Update to indicate that the rank `rank` is to be removed
+ * from the damaged list of the filesystem `fscid`
+ */
+bool FSMap::undamaged(const fs_cluster_id_t fscid, const mds_rank_t rank)
+{
+ auto fs = filesystems.at(fscid);
+
+ if (fs->mds_map.damaged.erase(rank)) {
+ fs->mds_map.failed.insert(rank);
+ fs->mds_map.epoch = epoch;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+void FSMap::insert(const MDSMap::mds_info_t &new_info)
+{
+ assert(new_info.state == MDSMap::STATE_STANDBY);
+ assert(new_info.rank == MDS_RANK_NONE);
+ mds_roles[new_info.global_id] = FS_CLUSTER_ID_NONE;
+ standby_daemons[new_info.global_id] = new_info;
+ standby_epochs[new_info.global_id] = epoch;
+}
+
+std::list<mds_gid_t> FSMap::stop(mds_gid_t who)
+{
+ assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE);
+ auto fs = filesystems.at(mds_roles.at(who));
+ const auto &info = fs->mds_map.mds_info.at(who);
+ fs->mds_map.up.erase(info.rank);
+ fs->mds_map.in.erase(info.rank);
+ fs->mds_map.stopped.insert(info.rank);
+
+ // Also drop any standby replays that were following this rank
+ std::list<mds_gid_t> standbys;
+ for (const auto &i : fs->mds_map.mds_info) {
+ const auto &other_gid = i.first;
+ const auto &other_info = i.second;
+ if (other_info.rank == info.rank
+ && other_info.state == MDSMap::STATE_STANDBY_REPLAY) {
+ standbys.push_back(other_gid);
+ erase(other_gid, 0);
+ }
+ }
+
+ fs->mds_map.mds_info.erase(who);
+ mds_roles.erase(who);
+
+ fs->mds_map.epoch = epoch;
+
+ return standbys;
+}
+
+
+/**
+ * Given one of the following forms:
+ * <fs name>:<rank>
+ * <fs id>:<rank>
+ * <rank>
+ *
+ * Parse into a mds_role_t. The rank-only form is only valid
+ * if legacy_client_ns is set.
+ */
+int FSMap::parse_role(
+ const std::string &role_str,
+ mds_role_t *role,
+ std::ostream &ss) const
+{
+ size_t colon_pos = role_str.find(":");
+ size_t rank_pos;
+ std::shared_ptr<const Filesystem> fs;
+ if (colon_pos == std::string::npos) {
+ if (legacy_client_fscid == FS_CLUSTER_ID_NONE) {
+ ss << "No filesystem selected";
+ return -ENOENT;
+ }
+ fs = get_filesystem(legacy_client_fscid);
+ rank_pos = 0;
+ } else {
+ if (parse_filesystem(role_str.substr(0, colon_pos), &fs) < 0) {
+ ss << "Invalid filesystem";
+ return -ENOENT;
+ }
+ rank_pos = colon_pos+1;
+ }
+
+ mds_rank_t rank;
+ std::string err;
+ std::string rank_str = role_str.substr(rank_pos);
+ long rank_i = strict_strtol(rank_str.c_str(), 10, &err);
+ if (rank_i < 0 || !err.empty()) {
+ ss << "Invalid rank '" << rank_str << "'";
+ return -EINVAL;
+ } else {
+ rank = rank_i;
+ }
+
+ if (fs->mds_map.in.count(rank) == 0) {
+ ss << "Rank '" << rank << "' not found";
+ return -ENOENT;
+ }
+
+ *role = {fs->fscid, rank};
+
+ return 0;
+}
Code Review / stor4nfv.git / blobdiff