/
MDSMap.cc
1277 lines (1167 loc) · 37.8 KB
/
MDSMap.cc
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// -*- 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 <ostream>
#include "common/debug.h"
#include "mon/health_check.h"
#include "MDSMap.h"
using std::dec;
using std::hex;
using std::list;
using std::make_pair;
using std::map;
using std::multimap;
using std::ostream;
using std::pair;
using std::set;
using std::string;
using std::vector;
using ceph::bufferlist;
using ceph::Formatter;
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_
// features
CompatSet MDSMap::get_compat_set_all() {
CompatSet::FeatureSet feature_compat;
CompatSet::FeatureSet feature_ro_compat;
CompatSet::FeatureSet feature_incompat;
feature_incompat.insert(MDS_FEATURE_INCOMPAT_BASE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_CLIENTRANGES);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_FILELAYOUT);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_DIRINODE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_ENCODING);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_OMAPDIRFRAG);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_INLINE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_NOANCHOR);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_FILE_LAYOUT_V2);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_SNAPREALM_V2);
return CompatSet(feature_compat, feature_ro_compat, feature_incompat);
}
CompatSet MDSMap::get_compat_set_default() {
CompatSet::FeatureSet feature_compat;
CompatSet::FeatureSet feature_ro_compat;
CompatSet::FeatureSet feature_incompat;
feature_incompat.insert(MDS_FEATURE_INCOMPAT_BASE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_CLIENTRANGES);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_FILELAYOUT);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_DIRINODE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_ENCODING);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_OMAPDIRFRAG);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_NOANCHOR);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_FILE_LAYOUT_V2);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_SNAPREALM_V2);
return CompatSet(feature_compat, feature_ro_compat, feature_incompat);
}
// base (pre v0.20)
CompatSet MDSMap::get_compat_set_base() {
CompatSet::FeatureSet feature_compat_base;
CompatSet::FeatureSet feature_incompat_base;
feature_incompat_base.insert(MDS_FEATURE_INCOMPAT_BASE);
CompatSet::FeatureSet feature_ro_compat_base;
return CompatSet(feature_compat_base, feature_ro_compat_base, feature_incompat_base);
}
// pre-v16.2.5 CompatSet in MDS beacon
CompatSet MDSMap::get_compat_set_v16_2_4() {
CompatSet::FeatureSet feature_compat;
CompatSet::FeatureSet feature_ro_compat;
CompatSet::FeatureSet feature_incompat;
feature_incompat.insert(MDS_FEATURE_INCOMPAT_BASE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_CLIENTRANGES);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_FILELAYOUT);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_DIRINODE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_ENCODING);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_OMAPDIRFRAG);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_INLINE);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_NOANCHOR);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_FILE_LAYOUT_V2);
feature_incompat.insert(MDS_FEATURE_INCOMPAT_SNAPREALM_V2);
return CompatSet(feature_compat, feature_ro_compat, feature_incompat);
}
void MDSMap::mds_info_t::dump(Formatter *f) const
{
f->dump_unsigned("gid", global_id);
f->dump_string("name", name);
f->dump_int("rank", rank);
f->dump_int("incarnation", inc);
f->dump_stream("state") << ceph_mds_state_name(state);
f->dump_int("state_seq", state_seq);
f->dump_stream("addr") << addrs.get_legacy_str();
f->dump_object("addrs", addrs);
f->dump_int("join_fscid", join_fscid);
if (laggy_since != utime_t())
f->dump_stream("laggy_since") << laggy_since;
f->open_array_section("export_targets");
for (set<mds_rank_t>::iterator p = export_targets.begin();
p != export_targets.end(); ++p) {
f->dump_int("mds", *p);
}
f->close_section();
f->dump_unsigned("features", mds_features);
f->dump_unsigned("flags", flags);
f->dump_object("compat", compat);
}
void MDSMap::mds_info_t::dump(std::ostream& o) const
{
o << "[mds." << name << "{" << rank << ":" << global_id << "}"
<< " state " << ceph_mds_state_name(state)
<< " seq " << state_seq;
if (laggy()) {
o << " laggy since " << laggy_since;
}
if (!export_targets.empty()) {
o << " export targets " << export_targets;
}
if (is_frozen()) {
o << " frozen";
}
if (join_fscid != FS_CLUSTER_ID_NONE) {
o << " join_fscid=" << join_fscid;
}
o << " addr " << addrs;
o << " compat ";
compat.printlite(o);
o << "]";
}
void MDSMap::mds_info_t::generate_test_instances(std::list<mds_info_t*>& ls)
{
mds_info_t *sample = new mds_info_t();
ls.push_back(sample);
sample = new mds_info_t();
sample->global_id = 1;
sample->name = "test_instance";
sample->rank = 0;
ls.push_back(sample);
}
void MDSMap::dump(Formatter *f) const
{
f->dump_int("epoch", epoch);
f->dump_unsigned("flags", flags);
dump_flags_state(f);
f->dump_unsigned("ever_allowed_features", ever_allowed_features);
f->dump_unsigned("explicitly_allowed_features", explicitly_allowed_features);
f->dump_stream("created") << created;
f->dump_stream("modified") << modified;
f->dump_int("tableserver", tableserver);
f->dump_int("root", root);
f->dump_int("session_timeout", session_timeout);
f->dump_int("session_autoclose", session_autoclose);
f->open_object_section("required_client_features");
cephfs_dump_features(f, required_client_features);
f->close_section();
f->dump_int("max_file_size", max_file_size);
f->dump_int("last_failure", last_failure);
f->dump_int("last_failure_osd_epoch", last_failure_osd_epoch);
f->open_object_section("compat");
compat.dump(f);
f->close_section();
f->dump_int("max_mds", max_mds);
f->open_array_section("in");
for (set<mds_rank_t>::const_iterator p = in.begin(); p != in.end(); ++p)
f->dump_int("mds", *p);
f->close_section();
f->open_object_section("up");
for (map<mds_rank_t,mds_gid_t>::const_iterator p = up.begin(); p != up.end(); ++p) {
char s[14];
sprintf(s, "mds_%d", int(p->first));
f->dump_int(s, p->second);
}
f->close_section();
f->open_array_section("failed");
for (set<mds_rank_t>::const_iterator p = failed.begin(); p != failed.end(); ++p)
f->dump_int("mds", *p);
f->close_section();
f->open_array_section("damaged");
for (set<mds_rank_t>::const_iterator p = damaged.begin(); p != damaged.end(); ++p)
f->dump_int("mds", *p);
f->close_section();
f->open_array_section("stopped");
for (set<mds_rank_t>::const_iterator p = stopped.begin(); p != stopped.end(); ++p)
f->dump_int("mds", *p);
f->close_section();
f->open_object_section("info");
for (const auto& [gid, info] : mds_info) {
char s[25]; // 'gid_' + len(str(ULLONG_MAX)) + '\0'
sprintf(s, "gid_%llu", (long long unsigned)gid);
f->open_object_section(s);
info.dump(f);
f->close_section();
}
f->close_section();
f->open_array_section("data_pools");
for (const auto& p: data_pools)
f->dump_int("pool", p);
f->close_section();
f->dump_int("metadata_pool", metadata_pool);
f->dump_bool("enabled", enabled);
f->dump_string("fs_name", fs_name);
f->dump_string("balancer", balancer);
f->dump_string("bal_rank_mask", bal_rank_mask);
f->dump_int("standby_count_wanted", std::max(0, standby_count_wanted));
}
void MDSMap::dump_flags_state(Formatter *f) const
{
f->open_object_section("flags_state");
f->dump_bool(flag_display.at(CEPH_MDSMAP_NOT_JOINABLE), joinable());
f->dump_bool(flag_display.at(CEPH_MDSMAP_ALLOW_SNAPS), allows_snaps());
f->dump_bool(flag_display.at(CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS), allows_multimds_snaps());
f->dump_bool(flag_display.at(CEPH_MDSMAP_ALLOW_STANDBY_REPLAY), allows_standby_replay());
f->dump_bool(flag_display.at(CEPH_MDSMAP_REFUSE_CLIENT_SESSION), test_flag(CEPH_MDSMAP_REFUSE_CLIENT_SESSION));
f->close_section();
}
void MDSMap::generate_test_instances(std::list<MDSMap*>& ls)
{
MDSMap *m = new MDSMap();
m->max_mds = 1;
m->data_pools.push_back(0);
m->metadata_pool = 1;
m->cas_pool = 2;
m->compat = get_compat_set_all();
// these aren't the defaults, just in case anybody gets confused
m->session_timeout = 61;
m->session_autoclose = 301;
m->max_file_size = 1<<24;
ls.push_back(m);
}
void MDSMap::print(ostream& out) const
{
out << "fs_name\t" << fs_name << "\n";
out << "epoch\t" << epoch << "\n";
out << "flags\t" << hex << flags << dec;
print_flags(out);
out << "\n";
out << "created\t" << created << "\n";
out << "modified\t" << modified << "\n";
out << "tableserver\t" << tableserver << "\n";
out << "root\t" << root << "\n";
out << "session_timeout\t" << session_timeout << "\n"
<< "session_autoclose\t" << session_autoclose << "\n";
out << "max_file_size\t" << max_file_size << "\n";
out << "required_client_features\t" << cephfs_stringify_features(required_client_features) << "\n";
out << "last_failure\t" << last_failure << "\n"
<< "last_failure_osd_epoch\t" << last_failure_osd_epoch << "\n";
out << "compat\t" << compat << "\n";
out << "max_mds\t" << max_mds << "\n";
out << "in\t" << in << "\n"
<< "up\t" << up << "\n"
<< "failed\t" << failed << "\n"
<< "damaged\t" << damaged << "\n"
<< "stopped\t" << stopped << "\n";
out << "data_pools\t" << data_pools << "\n";
out << "metadata_pool\t" << metadata_pool << "\n";
out << "inline_data\t" << (inline_data_enabled ? "enabled" : "disabled") << "\n";
out << "balancer\t" << balancer << "\n";
out << "bal_rank_mask\t" << bal_rank_mask << "\n";
out << "standby_count_wanted\t" << std::max(0, standby_count_wanted) << "\n";
multimap< pair<mds_rank_t, unsigned>, mds_gid_t > foo;
for (const auto &p : mds_info) {
foo.insert(std::make_pair(
std::make_pair(p.second.rank, p.second.inc-1), p.first));
}
for (const auto &p : foo) {
out << mds_info.at(p.second) << "\n";
}
}
void MDSMap::print_summary(Formatter *f, ostream *out) const
{
map<mds_rank_t,string> by_rank;
map<string,int> by_state;
if (f) {
f->dump_unsigned("epoch", get_epoch());
f->dump_unsigned("up", up.size());
f->dump_unsigned("in", in.size());
f->dump_unsigned("max", max_mds);
} else {
*out << "e" << get_epoch() << ": " << up.size() << "/" << in.size() << "/" << max_mds << " up";
}
if (f)
f->open_array_section("by_rank");
for (const auto &p : mds_info) {
string s = ceph_mds_state_name(p.second.state);
if (p.second.laggy())
s += "(laggy or crashed)";
if (p.second.rank >= 0 && p.second.state != MDSMap::STATE_STANDBY_REPLAY) {
if (f) {
f->open_object_section("mds");
f->dump_unsigned("rank", p.second.rank);
f->dump_string("name", p.second.name);
f->dump_string("status", s);
f->close_section();
} else {
by_rank[p.second.rank] = p.second.name + "=" + s;
}
} else {
by_state[s]++;
}
}
if (f) {
f->close_section();
} else {
if (!by_rank.empty())
*out << " " << by_rank;
}
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;
}
}
if (!failed.empty()) {
if (f) {
f->dump_unsigned("failed", failed.size());
} else {
*out << ", " << failed.size() << " failed";
}
}
if (!damaged.empty()) {
if (f) {
f->dump_unsigned("damaged", damaged.size());
} else {
*out << ", " << damaged.size() << " damaged";
}
}
//if (stopped.size())
//out << ", " << stopped.size() << " stopped";
}
void MDSMap::print_flags(std::ostream& out) const {
if (joinable())
out << " " << flag_display.at(CEPH_MDSMAP_NOT_JOINABLE);
if (allows_snaps())
out << " " << flag_display.at(CEPH_MDSMAP_ALLOW_SNAPS);
if (allows_multimds_snaps())
out << " " << flag_display.at(CEPH_MDSMAP_ALLOW_MULTIMDS_SNAPS);
if (allows_standby_replay())
out << " " << flag_display.at(CEPH_MDSMAP_ALLOW_STANDBY_REPLAY);
if (test_flag(CEPH_MDSMAP_REFUSE_CLIENT_SESSION))
out << " " << flag_display.at(CEPH_MDSMAP_REFUSE_CLIENT_SESSION);
}
void MDSMap::get_health(list<pair<health_status_t,string> >& summary,
list<pair<health_status_t,string> > *detail) const
{
if (!failed.empty()) {
CachedStackStringStream css;
*css << "mds rank"
<< ((failed.size() > 1) ? "s ":" ")
<< failed
<< ((failed.size() > 1) ? " have":" has")
<< " failed";
summary.push_back(make_pair(HEALTH_ERR, css->str()));
if (detail) {
for (const auto& r : failed) {
CachedStackStringStream css;
*css << "mds." << r << " has failed";
detail->push_back(make_pair(HEALTH_ERR, css->str()));
}
}
}
if (!damaged.empty()) {
CachedStackStringStream css;
*css << "mds rank"
<< ((damaged.size() > 1) ? "s ":" ")
<< damaged
<< ((damaged.size() > 1) ? " are":" is")
<< " damaged";
summary.push_back(make_pair(HEALTH_ERR, css->str()));
if (detail) {
for (const auto& r : damaged) {
CachedStackStringStream css;
*css << "mds." << r << " is damaged";
detail->push_back(make_pair(HEALTH_ERR, css->str()));
}
}
}
if (is_degraded()) {
summary.push_back(make_pair(HEALTH_WARN, "mds cluster is degraded"));
if (detail) {
detail->push_back(make_pair(HEALTH_WARN, "mds cluster is degraded"));
for (mds_rank_t i = mds_rank_t(0); i< get_max_mds(); i++) {
if (!is_up(i))
continue;
mds_gid_t gid = up.find(i)->second;
const auto& info = mds_info.at(gid);
CachedStackStringStream css;
if (is_resolve(i))
*css << "mds." << info.name << " at " << info.addrs
<< " rank " << i << " is resolving";
if (is_replay(i))
*css << "mds." << info.name << " at " << info.addrs
<< " rank " << i << " is replaying journal";
if (is_rejoin(i))
*css << "mds." << info.name << " at " << info.addrs
<< " rank " << i << " is rejoining";
if (is_reconnect(i))
*css << "mds." << info.name << " at " << info.addrs
<< " rank " << i << " is reconnecting to clients";
if (css->strv().length())
detail->push_back(make_pair(HEALTH_WARN, css->str()));
}
}
}
{
CachedStackStringStream css;
*css << fs_name << " max_mds " << max_mds;
summary.push_back(make_pair(HEALTH_WARN, css->str()));
}
if ((mds_rank_t)up.size() < max_mds) {
CachedStackStringStream css;
*css << fs_name << " has " << up.size()
<< " active MDS(s), but has max_mds of " << max_mds;
summary.push_back(make_pair(HEALTH_WARN, css->str()));
}
set<string> laggy;
for (const auto &u : up) {
const auto& info = mds_info.at(u.second);
if (info.laggy()) {
laggy.insert(info.name);
if (detail) {
CachedStackStringStream css;
*css << "mds." << info.name << " at " << info.addrs
<< " is laggy/unresponsive";
detail->push_back(make_pair(HEALTH_WARN, css->str()));
}
}
}
if (!laggy.empty()) {
CachedStackStringStream css;
*css << "mds " << laggy
<< ((laggy.size() > 1) ? " are":" is")
<< " laggy";
summary.push_back(make_pair(HEALTH_WARN, css->str()));
}
if (get_max_mds() > 1 &&
was_snaps_ever_allowed() && !allows_multimds_snaps()) {
CachedStackStringStream css;
*css << "multi-active mds while there are snapshots possibly created by pre-mimic MDS";
summary.push_back(make_pair(HEALTH_WARN, css->str()));
}
}
void MDSMap::get_health_checks(health_check_map_t *checks) const
{
// MDS_DAMAGE
if (!damaged.empty()) {
health_check_t& check = checks->get_or_add("MDS_DAMAGE", HEALTH_ERR,
"%num% mds daemon%plurals% damaged",
damaged.size());
for (const auto& p : damaged) {
CachedStackStringStream css;
*css << "fs " << fs_name << " mds." << p << " is damaged";
check.detail.push_back(css->str());
}
}
// FS_DEGRADED
if (is_degraded()) {
health_check_t& fscheck = checks->get_or_add(
"FS_DEGRADED", HEALTH_WARN,
"%num% filesystem%plurals% %isorare% degraded", 1);
CachedStackStringStream css;
*css << "fs " << fs_name << " is degraded";
fscheck.detail.push_back(css->str());
list<string> detail;
for (mds_rank_t i = mds_rank_t(0); i< get_max_mds(); i++) {
if (!is_up(i))
continue;
mds_gid_t gid = up.find(i)->second;
const auto& info = mds_info.at(gid);
CachedStackStringStream css;
*css << "fs " << fs_name << " mds." << info.name << " at "
<< info.addrs << " rank " << i;
if (is_resolve(i))
*css << " is resolving";
if (is_replay(i))
*css << " is replaying journal";
if (is_rejoin(i))
*css << " is rejoining";
if (is_reconnect(i))
*css << " is reconnecting to clients";
if (css->strv().length())
detail.push_back(css->str());
}
}
// MDS_UP_LESS_THAN_MAX
if ((mds_rank_t)get_num_in_mds() < get_max_mds()) {
health_check_t& check = checks->add(
"MDS_UP_LESS_THAN_MAX", HEALTH_WARN,
"%num% filesystem%plurals% %isorare% online with fewer MDS than max_mds", 1);
CachedStackStringStream css;
*css << "fs " << fs_name << " has " << get_num_in_mds()
<< " MDS online, but wants " << get_max_mds();
check.detail.push_back(css->str());
}
// MDS_ALL_DOWN
if ((mds_rank_t)get_num_up_mds() == 0 && get_max_mds() > 0) {
health_check_t &check = checks->add(
"MDS_ALL_DOWN", HEALTH_ERR,
"%num% filesystem%plurals% %isorare% offline", 1);
CachedStackStringStream css;
*css << "fs " << fs_name << " is offline because no MDS is active for it.";
check.detail.push_back(css->str());
}
if (get_max_mds() > 1 &&
was_snaps_ever_allowed() && !allows_multimds_snaps()) {
health_check_t &check = checks->add(
"MULTIMDS_WITH_OLDSNAPS", HEALTH_ERR,
"%num% filesystem%plurals% %isorare% multi-active mds with old snapshots", 1);
CachedStackStringStream css;
*css << "multi-active mds while there are snapshots possibly created by pre-mimic MDS";
check.detail.push_back(css->str());
}
if (get_inline_data_enabled()) {
health_check_t &check = checks->add(
"FS_INLINE_DATA_DEPRECATED", HEALTH_WARN,
"%num% filesystem%plurals% with deprecated feature inline_data", 1);
CachedStackStringStream css;
*css << "fs " << fs_name << " has deprecated feature inline_data enabled.";
check.detail.push_back(css->str());
}
}
void MDSMap::mds_info_t::encode_versioned(bufferlist& bl, uint64_t features) const
{
__u8 v = 10;
if (!HAVE_FEATURE(features, SERVER_NAUTILUS)) {
v = 7;
}
ENCODE_START(v, 4, bl);
encode(global_id, bl);
encode(name, bl);
encode(rank, bl);
encode(inc, bl);
encode((int32_t)state, bl);
encode(state_seq, bl);
if (v < 8) {
encode(addrs.legacy_addr(), bl, features);
} else {
encode(addrs, bl, features);
}
encode(laggy_since, bl);
encode(MDS_RANK_NONE, bl); /* standby_for_rank */
encode(std::string(), bl); /* standby_for_name */
encode(export_targets, bl);
encode(mds_features, bl);
encode(join_fscid, bl); /* formerly: standby_for_fscid */
encode(false, bl);
if (v >= 9) {
encode(flags, bl);
}
if (v >= 10) {
encode(compat, bl);
}
ENCODE_FINISH(bl);
}
void MDSMap::mds_info_t::encode_unversioned(bufferlist& bl) const
{
__u8 struct_v = 3;
using ceph::encode;
encode(struct_v, bl);
encode(global_id, bl);
encode(name, bl);
encode(rank, bl);
encode(inc, bl);
encode((int32_t)state, bl);
encode(state_seq, bl);
encode(addrs.legacy_addr(), bl, 0);
encode(laggy_since, bl);
encode(MDS_RANK_NONE, bl);
encode(std::string(), bl);
encode(export_targets, bl);
}
void MDSMap::mds_info_t::decode(bufferlist::const_iterator& bl)
{
DECODE_START_LEGACY_COMPAT_LEN(10, 4, 4, bl);
decode(global_id, bl);
decode(name, bl);
decode(rank, bl);
decode(inc, bl);
int32_t raw_state;
decode(raw_state, bl);
state = (MDSMap::DaemonState)raw_state;
decode(state_seq, bl);
decode(addrs, bl);
decode(laggy_since, bl);
{
mds_rank_t standby_for_rank;
decode(standby_for_rank, bl);
}
{
std::string standby_for_name;
decode(standby_for_name, bl);
}
if (struct_v >= 2)
decode(export_targets, bl);
if (struct_v >= 5)
decode(mds_features, bl);
if (struct_v >= 6) {
decode(join_fscid, bl);
}
if (struct_v >= 7) {
bool standby_replay;
decode(standby_replay, bl);
}
if (struct_v >= 9) {
decode(flags, bl);
}
if (struct_v >= 10) {
decode(compat, bl);
} else {
compat = MDSMap::get_compat_set_v16_2_4();
}
DECODE_FINISH(bl);
}
std::string MDSMap::mds_info_t::human_name() const
{
// Like "daemon mds.myhost restarted", "Activating daemon mds.myhost"
CachedStackStringStream css;
*css << "daemon mds." << name;
return css->str();
}
void MDSMap::encode(bufferlist& bl, uint64_t features) const
{
std::map<mds_rank_t,int32_t> inc; // Legacy field, fake it so that
// old-mon peers have something sane
// during upgrade
for (const auto rank : in) {
inc.insert(std::make_pair(rank, epoch));
}
using ceph::encode;
if ((features & CEPH_FEATURE_PGID64) == 0) {
__u16 v = 2;
encode(v, bl);
encode(epoch, bl);
encode(flags, bl);
encode(last_failure, bl);
encode(root, bl);
encode(session_timeout, bl);
encode(session_autoclose, bl);
encode(max_file_size, bl);
encode(max_mds, bl);
__u32 n = mds_info.size();
encode(n, bl);
for (map<mds_gid_t, mds_info_t>::const_iterator i = mds_info.begin();
i != mds_info.end(); ++i) {
encode(i->first, bl);
encode(i->second, bl, features);
}
n = data_pools.size();
encode(n, bl);
for (const auto p: data_pools) {
n = p;
encode(n, bl);
}
int32_t m = cas_pool;
encode(m, bl);
return;
} else if ((features & CEPH_FEATURE_MDSENC) == 0) {
__u16 v = 3;
encode(v, bl);
encode(epoch, bl);
encode(flags, bl);
encode(last_failure, bl);
encode(root, bl);
encode(session_timeout, bl);
encode(session_autoclose, bl);
encode(max_file_size, bl);
encode(max_mds, bl);
__u32 n = mds_info.size();
encode(n, bl);
for (map<mds_gid_t, mds_info_t>::const_iterator i = mds_info.begin();
i != mds_info.end(); ++i) {
encode(i->first, bl);
encode(i->second, bl, features);
}
encode(data_pools, bl);
encode(cas_pool, bl);
__u16 ev = 5;
encode(ev, bl);
encode(compat, bl);
encode(metadata_pool, bl);
encode(created, bl);
encode(modified, bl);
encode(tableserver, bl);
encode(in, bl);
encode(inc, bl);
encode(up, bl);
encode(failed, bl);
encode(stopped, bl);
encode(last_failure_osd_epoch, bl);
return;
}
ENCODE_START(5, 4, bl);
encode(epoch, bl);
encode(flags, bl);
encode(last_failure, bl);
encode(root, bl);
encode(session_timeout, bl);
encode(session_autoclose, bl);
encode(max_file_size, bl);
encode(max_mds, bl);
encode(mds_info, bl, features);
encode(data_pools, bl);
encode(cas_pool, bl);
__u16 ev = 17;
encode(ev, bl);
encode(compat, bl);
encode(metadata_pool, bl);
encode(created, bl);
encode(modified, bl);
encode(tableserver, bl);
encode(in, bl);
encode(inc, bl);
encode(up, bl);
encode(failed, bl);
encode(stopped, bl);
encode(last_failure_osd_epoch, bl);
encode(ever_allowed_features, bl);
encode(explicitly_allowed_features, bl);
encode(inline_data_enabled, bl);
encode(enabled, bl);
encode(fs_name, bl);
encode(damaged, bl);
encode(balancer, bl);
encode(standby_count_wanted, bl);
encode(old_max_mds, bl);
{
ceph_release_t min_compat_client = ceph_release_t::unknown;
encode(min_compat_client, bl);
}
encode(required_client_features, bl);
encode(bal_rank_mask, bl);
ENCODE_FINISH(bl);
}
void MDSMap::sanitize(const std::function<bool(int64_t pool)>& pool_exists)
{
/* Before we did stricter checking, it was possible to remove a data pool
* without also deleting it from the MDSMap. Check for that here after
* decoding the data pools.
*/
for (auto it = data_pools.begin(); it != data_pools.end();) {
if (!pool_exists(*it)) {
dout(0) << "removed non-existant data pool " << *it << " from MDSMap" << dendl;
it = data_pools.erase(it);
} else {
it++;
}
}
}
void MDSMap::decode(bufferlist::const_iterator& p)
{
std::map<mds_rank_t,int32_t> inc; // Legacy field, parse and drop
cached_up_features = 0;
DECODE_START_LEGACY_COMPAT_LEN_16(5, 4, 4, p);
decode(epoch, p);
decode(flags, p);
decode(last_failure, p);
decode(root, p);
decode(session_timeout, p);
decode(session_autoclose, p);
decode(max_file_size, p);
decode(max_mds, p);
decode(mds_info, p);
if (struct_v < 3) {
__u32 n;
decode(n, p);
while (n--) {
__u32 m;
decode(m, p);
data_pools.push_back(m);
}
__s32 s;
decode(s, p);
cas_pool = s;
} else {
decode(data_pools, p);
decode(cas_pool, p);
}
// kclient ignores everything from here
__u16 ev = 1;
if (struct_v >= 2)
decode(ev, p);
if (ev >= 3)
decode(compat, p);
else
compat = get_compat_set_base();
if (ev < 5) {
__u32 n;
decode(n, p);
metadata_pool = n;
} else {
decode(metadata_pool, p);
}
decode(created, p);
decode(modified, p);
decode(tableserver, p);
decode(in, p);
decode(inc, p);
decode(up, p);
decode(failed, p);
decode(stopped, p);
if (ev >= 4)
decode(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);
ever_allowed_features = flag ? CEPH_MDSMAP_ALLOW_SNAPS : 0;
decode(flag, p);
explicitly_allowed_features = flag ? CEPH_MDSMAP_ALLOW_SNAPS : 0;
} else {
decode(ever_allowed_features, p);
decode(explicitly_allowed_features, p);
}
} else {
ever_allowed_features = 0;
explicitly_allowed_features = 0;
}
if (ev >= 7)
decode(inline_data_enabled, p);
if (ev >= 8) {
ceph_assert(struct_v >= 5);
decode(enabled, p);
decode(fs_name, p);
} else {
if (epoch > 1) {
// If an MDS has ever been started, epoch will be greater than 1,
// assume filesystem is enabled.
enabled = true;
} else {
// Upgrading from a cluster that never used an MDS, switch off
// filesystem until it's explicitly enabled.
enabled = false;
}
}
if (ev >= 9) {
decode(damaged, p);
}
if (ev >= 11) {
decode(balancer, p);
}
if (ev >= 12) {
decode(standby_count_wanted, p);
}
if (ev >= 13) {
decode(old_max_mds, p);
}
if (ev >= 14) {
ceph_release_t min_compat_client;
if (ev == 14) {
int8_t r;
decode(r, p);
if (r < 0) {
min_compat_client = ceph_release_t::unknown;
} else {
min_compat_client = ceph_release_t{static_cast<uint8_t>(r)};
}
} else if (ev >= 15) {
decode(min_compat_client, p);
}
if (ev >= 16) {
decode(required_client_features, p);
} else {
set_min_compat_client(min_compat_client);
}
}
if (ev >= 17) {
decode(bal_rank_mask, p);
}
/* All MDS since at least v14.0.0 understand INLINE */
/* TODO: remove after R is released */
compat.incompat.insert(MDS_FEATURE_INCOMPAT_INLINE);
for (auto& p: mds_info) {
static const CompatSet empty;
auto& info = p.second;
if (empty.compare(info.compat) == 0) {
/* bootstrap old compat; mds_info_t::decode does not have access to MDSMap */
info.compat = compat;
}
/* All MDS since at least v14.0.0 understand INLINE */
/* TODO: remove after R is released */
info.compat.incompat.insert(MDS_FEATURE_INCOMPAT_INLINE);
}
DECODE_FINISH(p);
}
MDSMap::availability_t MDSMap::is_cluster_available() const
{
if (epoch == 0) {
// If I'm a client, this means I'm looking at an MDSMap instance
// that was never actually initialized from the mons. Client should
// wait.
return TRANSIENT_UNAVAILABLE;
}
// If a rank is marked damage (unavailable until operator intervenes)
if (damaged.size()) {
return STUCK_UNAVAILABLE;
}
// If no ranks are created (filesystem not initialized)
if (in.empty()) {
return STUCK_UNAVAILABLE;
}
for (const auto rank : in) {
if (up.count(rank) && mds_info.at(up.at(rank)).laggy()) {
// This might only be transient, but because we can't see
// standbys, we have no way of knowing whether there is a
// standby available to replace the laggy guy.
return STUCK_UNAVAILABLE;
}
}
if (get_num_mds(CEPH_MDS_STATE_ACTIVE) > 0) {
// Nobody looks stuck, so indicate to client they should go ahead
// and try mounting if anybody is active. This may include e.g.
// one MDS failing over and another active: the client should
// proceed to start talking to the active one and let the
// transiently-unavailable guy catch up later.
return AVAILABLE;
} else {
// Nothing indicating we were stuck, but nobody active (yet)