--- /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.
+ *
+ */
+
+
+#ifndef CEPH_MDSMAP_H
+#define CEPH_MDSMAP_H
+
+#include <errno.h>
+
+#include "include/types.h"
+#include "common/Clock.h"
+#include "msg/Message.h"
+#include "include/health.h"
+
+#include <set>
+#include <map>
+#include <string>
+#include <algorithm>
+
+#include "common/config.h"
+
+#include "include/CompatSet.h"
+#include "include/ceph_features.h"
+#include "common/Formatter.h"
+#include "mds/mdstypes.h"
+
+/*
+
+ boot --> standby, creating, or starting.
+
+
+ dne ----> creating -----> active*
+ ^ ^___________/ / ^ ^
+ | / / |
+ destroying / / |
+ ^ / / |
+ | / / |
+ stopped <---- stopping* <-/ / |
+ \ / |
+ ----- starting* ----/ |
+ |
+ failed |
+ \ |
+ \--> replay* --> reconnect* --> rejoin*
+
+ * = can fail
+
+*/
+
+class CephContext;
+class health_check_map_t;
+
+extern CompatSet get_mdsmap_compat_set_all();
+extern CompatSet get_mdsmap_compat_set_default();
+extern CompatSet get_mdsmap_compat_set_base(); // pre v0.20
+
+#define MDS_FEATURE_INCOMPAT_BASE CompatSet::Feature(1, "base v0.20")
+#define MDS_FEATURE_INCOMPAT_CLIENTRANGES CompatSet::Feature(2, "client writeable ranges")
+#define MDS_FEATURE_INCOMPAT_FILELAYOUT CompatSet::Feature(3, "default file layouts on dirs")
+#define MDS_FEATURE_INCOMPAT_DIRINODE CompatSet::Feature(4, "dir inode in separate object")
+#define MDS_FEATURE_INCOMPAT_ENCODING CompatSet::Feature(5, "mds uses versioned encoding")
+#define MDS_FEATURE_INCOMPAT_OMAPDIRFRAG CompatSet::Feature(6, "dirfrag is stored in omap")
+#define MDS_FEATURE_INCOMPAT_INLINE CompatSet::Feature(7, "mds uses inline data")
+#define MDS_FEATURE_INCOMPAT_NOANCHOR CompatSet::Feature(8, "no anchor table")
+#define MDS_FEATURE_INCOMPAT_FILE_LAYOUT_V2 CompatSet::Feature(8, "file layout v2")
+
+#define MDS_FS_NAME_DEFAULT "cephfs"
+
+class MDSMap {
+public:
+ /* These states are the union of the set of possible states of an MDS daemon,
+ * and the set of possible states of an MDS rank */
+ typedef enum {
+ // States of an MDS daemon not currently holding a rank
+ // ====================================================
+ STATE_NULL = CEPH_MDS_STATE_NULL, // null value for fns returning this type.
+ STATE_BOOT = CEPH_MDS_STATE_BOOT, // up, boot announcement. destiny unknown.
+ STATE_STANDBY = CEPH_MDS_STATE_STANDBY, // up, idle. waiting for assignment by monitor.
+ STATE_STANDBY_REPLAY = CEPH_MDS_STATE_STANDBY_REPLAY, // up, replaying active node, ready to take over.
+
+ // States of an MDS rank, and of any MDS daemon holding that rank
+ // ==============================================================
+ STATE_STOPPED = CEPH_MDS_STATE_STOPPED, // down, once existed, but no subtrees. empty log. may not be held by a daemon.
+
+ STATE_CREATING = CEPH_MDS_STATE_CREATING, // up, creating MDS instance (new journal, idalloc..).
+ STATE_STARTING = CEPH_MDS_STATE_STARTING, // up, starting prior stopped MDS instance.
+
+ STATE_REPLAY = CEPH_MDS_STATE_REPLAY, // up, starting prior failed instance. scanning journal.
+ STATE_RESOLVE = CEPH_MDS_STATE_RESOLVE, // up, disambiguating distributed operations (import, rename, etc.)
+ STATE_RECONNECT = CEPH_MDS_STATE_RECONNECT, // up, reconnect to clients
+ STATE_REJOIN = CEPH_MDS_STATE_REJOIN, // up, replayed journal, rejoining distributed cache
+ STATE_CLIENTREPLAY = CEPH_MDS_STATE_CLIENTREPLAY, // up, active
+ STATE_ACTIVE = CEPH_MDS_STATE_ACTIVE, // up, active
+ STATE_STOPPING = CEPH_MDS_STATE_STOPPING, // up, exporting metadata (-> standby or out)
+ STATE_DNE = CEPH_MDS_STATE_DNE, // down, rank does not exist
+
+ // State which a daemon may send to MDSMonitor in its beacon
+ // to indicate that offline repair is required. Daemon must stop
+ // immediately after indicating this state.
+ STATE_DAMAGED = CEPH_MDS_STATE_DAMAGED
+
+ /*
+ * In addition to explicit states, an MDS rank implicitly in state:
+ * - STOPPED if it is not currently associated with an MDS daemon gid but it
+ * is in MDSMap::stopped
+ * - FAILED if it is not currently associated with an MDS daemon gid but it
+ * is in MDSMap::failed
+ * - DNE if it is not currently associated with an MDS daemon gid and it is
+ * missing from both MDSMap::failed and MDSMap::stopped
+ */
+ } DaemonState;
+
+ struct mds_info_t {
+ mds_gid_t global_id;
+ std::string name;
+ mds_rank_t rank;
+ int32_t inc;
+ MDSMap::DaemonState state;
+ version_t state_seq;
+ entity_addr_t addr;
+ utime_t laggy_since;
+ mds_rank_t standby_for_rank;
+ std::string standby_for_name;
+ fs_cluster_id_t standby_for_fscid;
+ bool standby_replay;
+ std::set<mds_rank_t> export_targets;
+ uint64_t mds_features = 0;
+
+ mds_info_t() : global_id(MDS_GID_NONE), rank(MDS_RANK_NONE), inc(0),
+ state(STATE_STANDBY), state_seq(0),
+ standby_for_rank(MDS_RANK_NONE),
+ standby_for_fscid(FS_CLUSTER_ID_NONE),
+ standby_replay(false)
+ { }
+
+ bool laggy() const { return !(laggy_since == utime_t()); }
+ void clear_laggy() { laggy_since = utime_t(); }
+
+ entity_inst_t get_inst() const { return entity_inst_t(entity_name_t::MDS(rank), addr); }
+
+ void encode(bufferlist& bl, uint64_t features) const {
+ if ((features & CEPH_FEATURE_MDSENC) == 0 ) encode_unversioned(bl);
+ else encode_versioned(bl, features);
+ }
+ void decode(bufferlist::iterator& p);
+ void dump(Formatter *f) const;
+ void print_summary(ostream &out) const;
+
+ // The long form name for use in cluster log messages`
+ std::string human_name() const;
+
+ static void generate_test_instances(list<mds_info_t*>& ls);
+ private:
+ void encode_versioned(bufferlist& bl, uint64_t features) const;
+ void encode_unversioned(bufferlist& bl) const;
+ };
+
+
+protected:
+ // base map
+ epoch_t epoch;
+ bool enabled;
+ std::string fs_name;
+ uint32_t flags; // flags
+ epoch_t last_failure; // mds epoch of last failure
+ epoch_t last_failure_osd_epoch; // osd epoch of last failure; any mds entering replay needs
+ // at least this osdmap to ensure the blacklist propagates.
+ utime_t created, modified;
+
+ mds_rank_t tableserver; // which MDS has snaptable
+ mds_rank_t root; // which MDS has root directory
+
+ __u32 session_timeout;
+ __u32 session_autoclose;
+ uint64_t max_file_size;
+
+ std::vector<int64_t> data_pools; // file data pools available to clients (via an ioctl). first is the default.
+ int64_t cas_pool; // where CAS objects go
+ int64_t metadata_pool; // where fs metadata objects go
+
+ /*
+ * in: the set of logical mds #'s that define the cluster. this is the set
+ * of mds's the metadata may be distributed over.
+ * up: map from logical mds #'s to the addrs filling those roles.
+ * failed: subset of @in that are failed.
+ * stopped: set of nodes that have been initialized, but are not active.
+ *
+ * @up + @failed = @in. @in * @stopped = {}.
+ */
+
+ mds_rank_t max_mds; /* The maximum number of active MDSes. Also, the maximum rank. */
+ mds_rank_t standby_count_wanted;
+ string balancer; /* The name/version of the mantle balancer (i.e. the rados obj name) */
+
+ std::set<mds_rank_t> in; // currently defined cluster
+
+ // which ranks are failed, stopped, damaged (i.e. not held by a daemon)
+ std::set<mds_rank_t> failed, stopped, damaged;
+ std::map<mds_rank_t, mds_gid_t> up; // who is in those roles
+ std::map<mds_gid_t, mds_info_t> mds_info;
+
+ uint8_t ever_allowed_features; //< bitmap of features the cluster has allowed
+ uint8_t explicitly_allowed_features; //< bitmap of features explicitly enabled
+
+ bool inline_data_enabled;
+
+ uint64_t cached_up_features;
+
+public:
+ CompatSet compat;
+
+ friend class MDSMonitor;
+ friend class Filesystem;
+ friend class FSMap;
+
+public:
+ MDSMap()
+ : epoch(0), enabled(false), fs_name(MDS_FS_NAME_DEFAULT),
+ flags(CEPH_MDSMAP_DEFAULTS), last_failure(0),
+ last_failure_osd_epoch(0),
+ tableserver(0), root(0),
+ session_timeout(0),
+ session_autoclose(0),
+ max_file_size(0),
+ cas_pool(-1),
+ metadata_pool(-1),
+ max_mds(0),
+ standby_count_wanted(-1),
+ ever_allowed_features(0),
+ explicitly_allowed_features(0),
+ inline_data_enabled(false),
+ cached_up_features(0)
+ { }
+
+ bool get_inline_data_enabled() const { return inline_data_enabled; }
+ void set_inline_data_enabled(bool enabled) { inline_data_enabled = enabled; }
+
+ utime_t get_session_timeout() const {
+ return utime_t(session_timeout,0);
+ }
+ uint64_t get_max_filesize() const { return max_file_size; }
+ void set_max_filesize(uint64_t m) { max_file_size = m; }
+
+ int get_flags() const { return flags; }
+ bool test_flag(int f) const { return flags & f; }
+ void set_flag(int f) { flags |= f; }
+ void clear_flag(int f) { flags &= ~f; }
+
+ const std::string &get_fs_name() const {return fs_name;}
+
+ void set_snaps_allowed() {
+ set_flag(CEPH_MDSMAP_ALLOW_SNAPS);
+ ever_allowed_features |= CEPH_MDSMAP_ALLOW_SNAPS;
+ explicitly_allowed_features |= CEPH_MDSMAP_ALLOW_SNAPS;
+ }
+ void clear_snaps_allowed() { clear_flag(CEPH_MDSMAP_ALLOW_SNAPS); }
+ bool allows_snaps() const { return test_flag(CEPH_MDSMAP_ALLOW_SNAPS); }
+
+ void set_multimds_allowed() {
+ set_flag(CEPH_MDSMAP_ALLOW_MULTIMDS);
+ ever_allowed_features |= CEPH_MDSMAP_ALLOW_MULTIMDS;
+ explicitly_allowed_features |= CEPH_MDSMAP_ALLOW_MULTIMDS;
+ }
+ void clear_multimds_allowed() { clear_flag(CEPH_MDSMAP_ALLOW_MULTIMDS); }
+ bool allows_multimds() const { return test_flag(CEPH_MDSMAP_ALLOW_MULTIMDS); }
+
+ void set_dirfrags_allowed() {
+ set_flag(CEPH_MDSMAP_ALLOW_DIRFRAGS);
+ ever_allowed_features |= CEPH_MDSMAP_ALLOW_DIRFRAGS;
+ explicitly_allowed_features |= CEPH_MDSMAP_ALLOW_DIRFRAGS;
+ }
+ void clear_dirfrags_allowed() { clear_flag(CEPH_MDSMAP_ALLOW_DIRFRAGS); }
+ bool allows_dirfrags() const { return test_flag(CEPH_MDSMAP_ALLOW_DIRFRAGS); }
+
+ epoch_t get_epoch() const { return epoch; }
+ void inc_epoch() { epoch++; }
+
+ bool get_enabled() const { return enabled; }
+
+ const utime_t& get_created() const { return created; }
+ void set_created(utime_t ct) { modified = created = ct; }
+ const utime_t& get_modified() const { return modified; }
+ void set_modified(utime_t mt) { modified = mt; }
+
+ epoch_t get_last_failure() const { return last_failure; }
+ epoch_t get_last_failure_osd_epoch() const { return last_failure_osd_epoch; }
+
+ mds_rank_t get_max_mds() const { return max_mds; }
+ void set_max_mds(mds_rank_t m) { max_mds = m; }
+
+ mds_rank_t get_standby_count_wanted(mds_rank_t standby_daemon_count) const {
+ assert(standby_daemon_count >= 0);
+ std::set<mds_rank_t> s;
+ get_standby_replay_mds_set(s);
+ mds_rank_t standbys_avail = (mds_rank_t)s.size()+standby_daemon_count;
+ mds_rank_t wanted = std::max(0, standby_count_wanted);
+ return wanted > standbys_avail ? wanted - standbys_avail : 0;
+ }
+ void set_standby_count_wanted(mds_rank_t n) { standby_count_wanted = n; }
+ bool check_health(mds_rank_t standby_daemon_count);
+
+ const std::string get_balancer() const { return balancer; }
+ void set_balancer(std::string val) { balancer.assign(val); }
+
+ mds_rank_t get_tableserver() const { return tableserver; }
+ mds_rank_t get_root() const { return root; }
+
+ const std::vector<int64_t> &get_data_pools() const { return data_pools; }
+ int64_t get_first_data_pool() const { return *data_pools.begin(); }
+ int64_t get_metadata_pool() const { return metadata_pool; }
+ bool is_data_pool(int64_t poolid) const {
+ auto p = std::find(data_pools.begin(), data_pools.end(), poolid);
+ if (p == data_pools.end())
+ return false;
+ return true;
+ }
+
+ bool pool_in_use(int64_t poolid) const {
+ return get_enabled() && (is_data_pool(poolid) || metadata_pool == poolid);
+ }
+
+ const std::map<mds_gid_t,mds_info_t>& get_mds_info() const { return mds_info; }
+ const mds_info_t& get_mds_info_gid(mds_gid_t gid) const {
+ return mds_info.at(gid);
+ }
+ const mds_info_t& get_mds_info(mds_rank_t m) const {
+ assert(up.count(m) && mds_info.count(up.at(m)));
+ return mds_info.at(up.at(m));
+ }
+ mds_gid_t find_mds_gid_by_name(const std::string& s) const {
+ for (std::map<mds_gid_t,mds_info_t>::const_iterator p = mds_info.begin();
+ p != mds_info.end();
+ ++p) {
+ if (p->second.name == s) {
+ return p->first;
+ }
+ }
+ return MDS_GID_NONE;
+ }
+
+ // counts
+ unsigned get_num_in_mds() const {
+ return in.size();
+ }
+ unsigned get_num_up_mds() const {
+ return up.size();
+ }
+ mds_rank_t get_last_in_mds() const {
+ auto p = in.rbegin();
+ return p == in.rend() ? MDS_RANK_NONE : *p;
+ }
+ int get_num_failed_mds() const {
+ return failed.size();
+ }
+ unsigned get_num_mds(int state) const {
+ unsigned n = 0;
+ for (std::map<mds_gid_t,mds_info_t>::const_iterator p = mds_info.begin();
+ p != mds_info.end();
+ ++p)
+ if (p->second.state == state) ++n;
+ return n;
+ }
+
+ // data pools
+ void add_data_pool(int64_t poolid) {
+ data_pools.push_back(poolid);
+ }
+ int remove_data_pool(int64_t poolid) {
+ std::vector<int64_t>::iterator p = std::find(data_pools.begin(), data_pools.end(), poolid);
+ if (p == data_pools.end())
+ return -ENOENT;
+ data_pools.erase(p);
+ return 0;
+ }
+
+ // sets
+ void get_mds_set(std::set<mds_rank_t>& s) const {
+ s = in;
+ }
+ void get_up_mds_set(std::set<mds_rank_t>& s) const {
+ for (std::map<mds_rank_t, mds_gid_t>::const_iterator p = up.begin();
+ p != up.end();
+ ++p)
+ s.insert(p->first);
+ }
+ void get_active_mds_set(std::set<mds_rank_t>& s) const {
+ get_mds_set(s, MDSMap::STATE_ACTIVE);
+ }
+ void get_standby_replay_mds_set(std::set<mds_rank_t>& s) const {
+ get_mds_set(s, MDSMap::STATE_STANDBY_REPLAY);
+ }
+ void get_failed_mds_set(std::set<mds_rank_t>& s) const {
+ s = failed;
+ }
+
+ // features
+ uint64_t get_up_features() {
+ if (!cached_up_features) {
+ bool first = true;
+ for (std::map<mds_rank_t, mds_gid_t>::const_iterator p = up.begin();
+ p != up.end();
+ ++p) {
+ std::map<mds_gid_t, mds_info_t>::const_iterator q =
+ mds_info.find(p->second);
+ assert(q != mds_info.end());
+ if (first) {
+ cached_up_features = q->second.mds_features;
+ first = false;
+ } else {
+ cached_up_features &= q->second.mds_features;
+ }
+ }
+ }
+ return cached_up_features;
+ }
+
+ /**
+ * Get MDS ranks which are in but not up.
+ */
+ void get_down_mds_set(std::set<mds_rank_t> *s) const
+ {
+ assert(s != NULL);
+ s->insert(failed.begin(), failed.end());
+ s->insert(damaged.begin(), damaged.end());
+ }
+
+ int get_failed() const {
+ if (!failed.empty()) return *failed.begin();
+ return -1;
+ }
+ void get_stopped_mds_set(std::set<mds_rank_t>& s) const {
+ s = stopped;
+ }
+ void get_recovery_mds_set(std::set<mds_rank_t>& s) const {
+ s = failed;
+ for (const auto& p : damaged)
+ s.insert(p);
+ for (const auto& p : mds_info)
+ if (p.second.state >= STATE_REPLAY && p.second.state <= STATE_STOPPING)
+ s.insert(p.second.rank);
+ }
+
+ void
+ get_clientreplay_or_active_or_stopping_mds_set(std::set<mds_rank_t>& s) const {
+ for (std::map<mds_gid_t, mds_info_t>::const_iterator p = mds_info.begin();
+ p != mds_info.end();
+ ++p)
+ if (p->second.state >= STATE_CLIENTREPLAY && p->second.state <= STATE_STOPPING)
+ s.insert(p->second.rank);
+ }
+ void get_mds_set(std::set<mds_rank_t>& s, DaemonState state) const {
+ for (std::map<mds_gid_t, mds_info_t>::const_iterator p = mds_info.begin();
+ p != mds_info.end();
+ ++p)
+ if (p->second.state == state)
+ s.insert(p->second.rank);
+ }
+
+ void get_health(list<pair<health_status_t,std::string> >& summary,
+ list<pair<health_status_t,std::string> > *detail) const;
+
+ void get_health_checks(health_check_map_t *checks) const;
+
+ typedef enum
+ {
+ AVAILABLE = 0,
+ TRANSIENT_UNAVAILABLE = 1,
+ STUCK_UNAVAILABLE = 2
+
+ } availability_t;
+
+ /**
+ * Return indication of whether cluster is available. This is a
+ * heuristic for clients to see if they should bother waiting to talk to
+ * MDSs, or whether they should error out at startup/mount.
+ *
+ * A TRANSIENT_UNAVAILABLE result indicates that the cluster is in a
+ * transition state like replaying, or is potentially about the fail over.
+ * Clients should wait for an updated map before making a final decision
+ * about whether the filesystem is mountable.
+ *
+ * A STUCK_UNAVAILABLE result indicates that we can't see a way that
+ * the cluster is about to recover on its own, so it'll probably require
+ * administrator intervention: clients should probaly not bother trying
+ * to mount.
+ */
+ availability_t is_cluster_available() const;
+
+ // mds states
+ bool is_down(mds_rank_t m) const { return up.count(m) == 0; }
+ bool is_up(mds_rank_t m) const { return up.count(m); }
+ bool is_in(mds_rank_t m) const { return up.count(m) || failed.count(m); }
+ bool is_out(mds_rank_t m) const { return !is_in(m); }
+
+ bool is_failed(mds_rank_t m) const { return failed.count(m); }
+ bool is_stopped(mds_rank_t m) const { return stopped.count(m); }
+
+ bool is_dne(mds_rank_t m) const { return in.count(m) == 0; }
+ bool is_dne_gid(mds_gid_t gid) const { return mds_info.count(gid) == 0; }
+
+ /**
+ * Get MDS rank state if the rank is up, else STATE_NULL
+ */
+ DaemonState get_state(mds_rank_t m) const {
+ std::map<mds_rank_t, mds_gid_t>::const_iterator u = up.find(m);
+ if (u == up.end())
+ return STATE_NULL;
+ return get_state_gid(u->second);
+ }
+
+ /**
+ * Get MDS daemon status by GID
+ */
+ DaemonState get_state_gid(mds_gid_t gid) const {
+ std::map<mds_gid_t,mds_info_t>::const_iterator i = mds_info.find(gid);
+ if (i == mds_info.end())
+ return STATE_NULL;
+ return i->second.state;
+ }
+
+ const mds_info_t& get_info(const mds_rank_t m) const {
+ return mds_info.at(up.at(m));
+ }
+ const mds_info_t& get_info_gid(const mds_gid_t gid) const {
+ return mds_info.at(gid);
+ }
+
+ bool is_boot(mds_rank_t m) const { return get_state(m) == STATE_BOOT; }
+ bool is_creating(mds_rank_t m) const { return get_state(m) == STATE_CREATING; }
+ bool is_starting(mds_rank_t m) const { return get_state(m) == STATE_STARTING; }
+ bool is_replay(mds_rank_t m) const { return get_state(m) == STATE_REPLAY; }
+ bool is_resolve(mds_rank_t m) const { return get_state(m) == STATE_RESOLVE; }
+ bool is_reconnect(mds_rank_t m) const { return get_state(m) == STATE_RECONNECT; }
+ bool is_rejoin(mds_rank_t m) const { return get_state(m) == STATE_REJOIN; }
+ bool is_clientreplay(mds_rank_t m) const { return get_state(m) == STATE_CLIENTREPLAY; }
+ bool is_active(mds_rank_t m) const { return get_state(m) == STATE_ACTIVE; }
+ bool is_stopping(mds_rank_t m) const { return get_state(m) == STATE_STOPPING; }
+ bool is_active_or_stopping(mds_rank_t m) const {
+ return is_active(m) || is_stopping(m);
+ }
+ bool is_clientreplay_or_active_or_stopping(mds_rank_t m) const {
+ return is_clientreplay(m) || is_active(m) || is_stopping(m);
+ }
+
+ bool is_followable(mds_rank_t m) const {
+ return (is_resolve(m) ||
+ is_replay(m) ||
+ is_rejoin(m) ||
+ is_clientreplay(m) ||
+ is_active(m) ||
+ is_stopping(m));
+ }
+
+ bool is_laggy_gid(mds_gid_t gid) const {
+ if (!mds_info.count(gid))
+ return false;
+ std::map<mds_gid_t,mds_info_t>::const_iterator p = mds_info.find(gid);
+ return p->second.laggy();
+ }
+
+ // degraded = some recovery in process. fixes active membership and
+ // recovery_set.
+ bool is_degraded() const {
+ if (!failed.empty() || !damaged.empty())
+ return true;
+ for (std::map<mds_gid_t,mds_info_t>::const_iterator p = mds_info.begin();
+ p != mds_info.end();
+ ++p)
+ if (p->second.state >= STATE_REPLAY && p->second.state <= STATE_CLIENTREPLAY)
+ return true;
+ return false;
+ }
+ bool is_any_failed() const {
+ return failed.size();
+ }
+ bool is_resolving() const {
+ return
+ get_num_mds(STATE_RESOLVE) > 0 &&
+ get_num_mds(STATE_REPLAY) == 0 &&
+ failed.empty() && damaged.empty();
+ }
+ bool is_rejoining() const {
+ // nodes are rejoining cache state
+ return
+ get_num_mds(STATE_REJOIN) > 0 &&
+ get_num_mds(STATE_REPLAY) == 0 &&
+ get_num_mds(STATE_RECONNECT) == 0 &&
+ get_num_mds(STATE_RESOLVE) == 0 &&
+ failed.empty() && damaged.empty();
+ }
+ bool is_stopped() const {
+ return up.empty();
+ }
+
+ /**
+ * Get whether a rank is 'up', i.e. has
+ * an MDS daemon's entity_inst_t associated
+ * with it.
+ */
+ bool have_inst(mds_rank_t m) const {
+ return up.count(m);
+ }
+
+ /**
+ * Get the MDS daemon entity_inst_t for a rank
+ * known to be up.
+ */
+ const entity_inst_t get_inst(mds_rank_t m) {
+ assert(up.count(m));
+ return mds_info[up[m]].get_inst();
+ }
+ const entity_addr_t get_addr(mds_rank_t m) {
+ assert(up.count(m));
+ return mds_info[up[m]].addr;
+ }
+
+ /**
+ * Get the MDS daemon entity_inst_t for a rank,
+ * if it is up.
+ *
+ * @return true if the rank was up and the inst
+ * was populated, else false.
+ */
+ bool get_inst(mds_rank_t m, entity_inst_t& inst) {
+ if (up.count(m)) {
+ inst = get_inst(m);
+ return true;
+ }
+ return false;
+ }
+
+ mds_rank_t get_rank_gid(mds_gid_t gid) const {
+ if (mds_info.count(gid)) {
+ return mds_info.at(gid).rank;
+ } else {
+ return MDS_RANK_NONE;
+ }
+ }
+
+ int get_inc_gid(mds_gid_t gid) const {
+ auto mds_info_entry = mds_info.find(gid);
+ if (mds_info_entry != mds_info.end())
+ return mds_info_entry->second.inc;
+ return -1;
+ }
+ void encode(bufferlist& bl, uint64_t features) const;
+ void decode(bufferlist::iterator& p);
+ void decode(bufferlist& bl) {
+ bufferlist::iterator p = bl.begin();
+ decode(p);
+ }
+ void sanitize(std::function<bool(int64_t pool)> pool_exists);
+
+ void print(ostream& out) const;
+ void print_summary(Formatter *f, ostream *out) const;
+
+ void dump(Formatter *f) const;
+ static void generate_test_instances(list<MDSMap*>& ls);
+
+ static bool state_transition_valid(DaemonState prev, DaemonState next);
+};
+WRITE_CLASS_ENCODER_FEATURES(MDSMap::mds_info_t)
+WRITE_CLASS_ENCODER_FEATURES(MDSMap)
+
+inline ostream& operator<<(ostream &out, const MDSMap &m) {
+ m.print_summary(NULL, &out);
+ return out;
+}
+
+#endif
Code Review / stor4nfv.git / blobdiff