diff options
Diffstat (limited to 'src/mds/MDSMap.h')
| -rw-r--r-- | src/mds/MDSMap.h | 686 |
1 files changed, 686 insertions, 0 deletions
diff --git a/src/mds/MDSMap.h b/src/mds/MDSMap.h new file mode 100644 index 00000000..031319da --- /dev/null +++ b/src/mds/MDSMap.h @@ -0,0 +1,686 @@ +// -*- 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 <algorithm> +#include <map> +#include <set> +#include <string> +#include <string_view> + +#include <errno.h> + +#include "include/types.h" +#include "common/Clock.h" +#include "include/health.h" + +#include "common/config.h" + +#include "include/CompatSet.h" +#include "include/ceph_features.h" +#include "common/Formatter.h" +#include "mds/mdstypes.h" + +class CephContext; +class health_check_map_t; + +#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(9, "file layout v2") +#define MDS_FEATURE_INCOMPAT_SNAPREALM_V2 CompatSet::Feature(10, "snaprealm 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. See + * doc/cephfs/mds-states.rst for state descriptions, + * doc/cephfs/mds-state-diagram.svg for a visual state diagram, and + * doc/cephfs/mds-state-diagram.dot to update mds-state-diagram.svg. + */ + 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 = MDS_GID_NONE; + std::string name; + mds_rank_t rank = MDS_RANK_NONE; + int32_t inc = 0; + MDSMap::DaemonState state = STATE_STANDBY; + version_t state_seq = 0; + entity_addrvec_t addrs; + utime_t laggy_since; + std::set<mds_rank_t> export_targets; + uint64_t mds_features = 0; + uint64_t flags = 0; + enum mds_flags : uint64_t { + FROZEN = 1 << 0, + }; + + mds_info_t() = default; + + bool laggy() const { return !(laggy_since == utime_t()); } + void clear_laggy() { laggy_since = utime_t(); } + + bool is_degraded() const { + return STATE_REPLAY <= state && state <= STATE_CLIENTREPLAY; + } + + void freeze() { flags |= mds_flags::FROZEN; } + void unfreeze() { flags &= ~mds_flags::FROZEN; } + bool is_frozen() const { return flags&mds_flags::FROZEN; } + + const entity_addrvec_t& get_addrs() const { + return addrs; + } + + 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::const_iterator& p); + void dump(Formatter *f) const; + void dump(std::ostream&) 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; + }; + + static CompatSet get_compat_set_all(); + static CompatSet get_compat_set_default(); + static CompatSet get_compat_set_base(); // pre v0.20 + +protected: + // base map + epoch_t epoch = 0; + bool enabled = false; + std::string fs_name = MDS_FS_NAME_DEFAULT; + uint32_t flags = CEPH_MDSMAP_DEFAULTS; // flags + epoch_t last_failure = 0; // mds epoch of last failure + epoch_t last_failure_osd_epoch = 0; // osd epoch of last failure; any mds entering replay needs + // at least this osdmap to ensure the blacklist propagates. + utime_t created; + utime_t modified; + + mds_rank_t tableserver = 0; // which MDS has snaptable + mds_rank_t root = 0; // which MDS has root directory + + __u32 session_timeout = 60; + __u32 session_autoclose = 300; + uint64_t max_file_size = 1ULL<<40; /* 1TB */ + + int8_t min_compat_client = -1; + + std::vector<int64_t> data_pools; // file data pools available to clients (via an ioctl). first is the default. + int64_t cas_pool = -1; // where CAS objects go + int64_t metadata_pool = -1; // 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 = 1; /* The maximum number of active MDSes. Also, the maximum rank. */ + mds_rank_t old_max_mds = 0; /* Value to restore when MDS cluster is marked up */ + mds_rank_t standby_count_wanted = -1; + 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 = 0; //< bitmap of features the cluster has allowed + uint8_t explicitly_allowed_features = 0; //< bitmap of features explicitly enabled + + bool inline_data_enabled = false; + + uint64_t cached_up_features = 0; + +public: + CompatSet compat; + + friend class MDSMonitor; + friend class Filesystem; + friend class FSMap; + +public: + 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); + } + void set_session_timeout(uint32_t t) { + session_timeout = t; + } + + utime_t get_session_autoclose() const { + return utime_t(session_autoclose, 0); + } + void set_session_autoclose(uint32_t t) { + session_autoclose = t; + } + + uint64_t get_max_filesize() const { return max_file_size; } + void set_max_filesize(uint64_t m) { max_file_size = m; } + + uint8_t get_min_compat_client() const { return min_compat_client; } + void set_min_compat_client(uint8_t version) { min_compat_client = version; } + + 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; } + + std::string_view 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); } + bool was_snaps_ever_allowed() const { return ever_allowed_features & CEPH_MDSMAP_ALLOW_SNAPS; } + + void set_standby_replay_allowed() { + set_flag(CEPH_MDSMAP_ALLOW_STANDBY_REPLAY); + ever_allowed_features |= CEPH_MDSMAP_ALLOW_STANDBY_REPLAY; + explicitly_allowed_features |= CEPH_MDSMAP_ALLOW_STANDBY_REPLAY; + } + void clear_standby_replay_allowed() { clear_flag(CEPH_MDSMAP_ALLOW_STANDBY_REPLAY); } + bool allows_standby_replay() const { return test_flag(CEPH_MDSMAP_ALLOW_STANDBY_REPLAY); } + bool was_standby_replay_ever_allowed() const { return ever_allowed_features & CEPH_MDSMAP_ALLOW_STANDBY_REPLAY; } + + void set_multimds_snaps_allowed() { + set_flag(CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS); + ever_allowed_features |= CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS; + explicitly_allowed_features |= CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS; + } + void clear_multimds_snaps_allowed() { clear_flag(CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS); } + bool allows_multimds_snaps() const { return test_flag(CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS); } + + 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; } + void set_old_max_mds() { old_max_mds = max_mds; } + mds_rank_t get_old_max_mds() const { return old_max_mds; } + + mds_rank_t get_standby_count_wanted(mds_rank_t standby_daemon_count) const { + ceph_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 auto& get_mds_info() const { return mds_info; } + const auto& 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 { + ceph_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(std::string_view s) const { + for (const auto& [gid, info] : mds_info) { + if (info.name == s) { + return gid; + } + } + 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); + ceph_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 + { + ceph_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_mds_set_lower_bound(std::set<mds_rank_t>& s, DaemonState first) 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 >= first && 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 probably not bother trying + * to mount. + */ + availability_t is_cluster_available() const; + + /** + * Return whether this MDSMap is suitable for resizing based on the state + * of the ranks. + */ + bool is_resizeable() const { + return !is_degraded() && + get_num_mds(CEPH_MDS_STATE_CREATING) == 0 && + get_num_mds(CEPH_MDS_STATE_STARTING) == 0 && + get_num_mds(CEPH_MDS_STATE_STOPPING) == 0; + } + + // 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 daemon status by GID + */ + auto get_state_gid(mds_gid_t gid) const { + auto it = mds_info.find(gid); + if (it == mds_info.end()) + return STATE_NULL; + return it->second.state; + } + + /** + * Get MDS rank state if the rank is up, else STATE_NULL + */ + auto get_state(mds_rank_t m) const { + auto it = up.find(m); + if (it == up.end()) + return STATE_NULL; + return get_state_gid(it->second); + } + + const auto& get_info(mds_rank_t m) const { + return mds_info.at(up.at(m)); + } + const auto& get_info_gid(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); + } + + mds_gid_t get_standby_replay(mds_rank_t r) const { + for (auto& [gid,info] : mds_info) { + if (info.rank == r && info.state == STATE_STANDBY_REPLAY) { + return gid; + } + } + return MDS_GID_NONE; + } + bool has_standby_replay(mds_rank_t r) const { + return get_standby_replay(r) != MDS_GID_NONE; + } + + bool is_followable(mds_rank_t r) const { + if (auto it1 = up.find(r); it1 != up.end()) { + if (auto it2 = mds_info.find(it1->second); it2 != mds_info.end()) { + auto& info = it2->second; + if (!info.is_degraded() && !has_standby_replay(r)) { + return true; + } + } + } + return false; + } + + bool is_laggy_gid(mds_gid_t gid) const { + auto it = mds_info.find(gid); + return it == mds_info.end() ? false : it->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 (const auto& p : mds_info) { + if (p.second.is_degraded()) + 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. + */ + entity_addrvec_t get_addrs(mds_rank_t m) const { + return mds_info.at(up.at(m)).get_addrs(); + } + + 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; + } + } + + /** + * Get MDS rank incarnation if the rank is up, else -1 + */ + mds_gid_t get_incarnation(mds_rank_t m) const { + std::map<mds_rank_t, mds_gid_t>::const_iterator u = up.find(m); + if (u == up.end()) + return MDS_GID_NONE; + return (mds_gid_t)get_inc_gid(u->second); + } + + 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::const_iterator& p); + void decode(const bufferlist& bl) { + auto p = bl.cbegin(); + decode(p); + } + void sanitize(const 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; +} + +inline std::ostream& operator<<(std::ostream& o, const MDSMap::mds_info_t& info) { + info.dump(o); + return o; +} + +#endif |