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PG.cc
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PG.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 "PG.h"
// #include "msg/Messenger.h"
#include "messages/MOSDRepScrub.h"
// #include "common/cmdparse.h"
// #include "common/ceph_context.h"
#include "common/errno.h"
#include "common/config.h"
#include "OSD.h"
#include "OpRequest.h"
#include "ScrubStore.h"
#include "common/Timer.h"
#include "common/perf_counters.h"
#include "messages/MOSDOp.h"
#include "messages/MOSDPGNotify.h"
// #include "messages/MOSDPGLog.h"
#include "messages/MOSDPGRemove.h"
#include "messages/MOSDPGInfo.h"
#include "messages/MOSDPGTrim.h"
#include "messages/MOSDPGScan.h"
#include "messages/MOSDPGBackfill.h"
#include "messages/MBackfillReserve.h"
#include "messages/MRecoveryReserve.h"
#include "messages/MOSDPGPush.h"
#include "messages/MOSDPGPushReply.h"
#include "messages/MOSDPGPull.h"
#include "messages/MOSDECSubOpWrite.h"
#include "messages/MOSDECSubOpWriteReply.h"
#include "messages/MOSDECSubOpRead.h"
#include "messages/MOSDECSubOpReadReply.h"
#include "messages/MOSDPGUpdateLogMissing.h"
#include "messages/MOSDPGUpdateLogMissingReply.h"
#include "messages/MOSDSubOp.h"
#include "messages/MOSDRepOp.h"
#include "messages/MOSDSubOpReply.h"
#include "messages/MOSDRepOpReply.h"
#include "common/BackTrace.h"
#ifdef WITH_LTTNG
#define TRACEPOINT_DEFINE
#define TRACEPOINT_PROBE_DYNAMIC_LINKAGE
#include "tracing/pg.h"
#undef TRACEPOINT_PROBE_DYNAMIC_LINKAGE
#undef TRACEPOINT_DEFINE
#else
#define tracepoint(...)
#endif
#include <sstream>
#define dout_subsys ceph_subsys_osd
#undef dout_prefix
#define dout_prefix _prefix(_dout, this)
// prefix pgmeta_oid keys with _ so that PGLog::read_log_and_missing() can
// easily skip them
const string infover_key("_infover");
const string info_key("_info");
const string biginfo_key("_biginfo");
const string epoch_key("_epoch");
const string fastinfo_key("_fastinfo");
template <class T>
static ostream& _prefix(std::ostream *_dout, T *t)
{
return *_dout << t->gen_prefix();
}
MEMPOOL_DEFINE_OBJECT_FACTORY(PG::CephPeeringEvt, pg_peering_evt, osd);
void PG::get(const char* tag)
{
ref++;
#ifdef PG_DEBUG_REFS
Mutex::Locker l(_ref_id_lock);
_tag_counts[tag]++;
#endif
}
void PG::put(const char* tag)
{
#ifdef PG_DEBUG_REFS
{
Mutex::Locker l(_ref_id_lock);
auto tag_counts_entry = _tag_counts.find(tag);
assert(tag_counts_entry != _tag_counts.end());
--tag_counts_entry->second;
if (tag_counts_entry->second == 0) {
_tag_counts.erase(tag_counts_entry);
}
}
#endif
if (--ref== 0)
delete this;
}
#ifdef PG_DEBUG_REFS
uint64_t PG::get_with_id()
{
ref++;
Mutex::Locker l(_ref_id_lock);
uint64_t id = ++_ref_id;
BackTrace bt(0);
stringstream ss;
bt.print(ss);
dout(20) << __func__ << ": " << info.pgid << " got id " << id << " (new) ref==" << ref << dendl;
assert(!_live_ids.count(id));
_live_ids.insert(make_pair(id, ss.str()));
return id;
}
void PG::put_with_id(uint64_t id)
{
dout(20) << __func__ << ": " << info.pgid << " put id " << id << " (current) ref==" << ref << dendl;
{
Mutex::Locker l(_ref_id_lock);
assert(_live_ids.count(id));
_live_ids.erase(id);
}
if (--ref == 0)
delete this;
}
void PG::dump_live_ids()
{
Mutex::Locker l(_ref_id_lock);
dout(0) << "\t" << __func__ << ": " << info.pgid << " live ids:" << dendl;
for (map<uint64_t, string>::iterator i = _live_ids.begin();
i != _live_ids.end();
++i) {
dout(0) << "\t\tid: " << *i << dendl;
}
dout(0) << "\t" << __func__ << ": " << info.pgid << " live tags:" << dendl;
for (map<string, uint64_t>::iterator i = _tag_counts.begin();
i != _tag_counts.end();
++i) {
dout(0) << "\t\tid: " << *i << dendl;
}
}
#endif
void PGPool::update(OSDMapRef map)
{
const pg_pool_t *pi = map->get_pg_pool(id);
assert(pi);
info = *pi;
auid = pi->auid;
name = map->get_pool_name(id);
bool updated = false;
if ((map->get_epoch() != cached_epoch + 1) ||
(pi->get_snap_epoch() == map->get_epoch())) {
updated = true;
pi->build_removed_snaps(newly_removed_snaps);
interval_set<snapid_t> intersection;
intersection.intersection_of(newly_removed_snaps, cached_removed_snaps);
if (intersection == cached_removed_snaps) {
newly_removed_snaps.subtract(cached_removed_snaps);
cached_removed_snaps.union_of(newly_removed_snaps);
} else {
lgeneric_subdout(g_ceph_context, osd, 0) << __func__
<< " cached_removed_snaps shrank from " << cached_removed_snaps
<< " to " << newly_removed_snaps << dendl;
cached_removed_snaps = newly_removed_snaps;
newly_removed_snaps.clear();
}
snapc = pi->get_snap_context();
} else {
/* 1) map->get_epoch() == cached_epoch + 1 &&
* 2) pi->get_snap_epoch() != map->get_epoch()
*
* From the if branch, 1 && 2 must be true. From 2, we know that
* this map didn't change the set of removed snaps. From 1, we
* know that our cached_removed_snaps matches the previous map.
* Thus, from 1 && 2, cached_removed snaps matches the current
* set of removed snaps and all we have to do is clear
* newly_removed_snaps.
*/
newly_removed_snaps.clear();
}
cached_epoch = map->get_epoch();
lgeneric_subdout(g_ceph_context, osd, 20)
<< "PGPool::update cached_removed_snaps "
<< cached_removed_snaps
<< " newly_removed_snaps "
<< newly_removed_snaps
<< " snapc " << snapc
<< (updated ? " (updated)":" (no change)")
<< dendl;
}
PG::PG(OSDService *o, OSDMapRef curmap,
const PGPool &_pool, spg_t p) :
osd(o),
cct(o->cct),
osdriver(osd->store, coll_t(), OSD::make_snapmapper_oid()),
snap_mapper(
&osdriver,
p.ps(),
p.get_split_bits(curmap->get_pg_num(_pool.id)),
_pool.id,
p.shard),
map_lock("PG::map_lock"),
osdmap_ref(curmap), last_persisted_osdmap_ref(curmap), pool(_pool),
_lock("PG::_lock"),
#ifdef PG_DEBUG_REFS
_ref_id_lock("PG::_ref_id_lock"), _ref_id(0),
#endif
deleting(false), dirty_info(false), dirty_big_info(false),
info(p),
info_struct_v(0),
coll(p), pg_log(cct),
pgmeta_oid(p.make_pgmeta_oid()),
missing_loc(this),
stat_queue_item(this),
scrub_queued(false),
recovery_queued(false),
recovery_ops_active(0),
role(-1),
state(0),
send_notify(false),
pg_whoami(osd->whoami, p.shard),
need_up_thru(false),
last_peering_reset(0),
heartbeat_peer_lock("PG::heartbeat_peer_lock"),
backfill_reserved(false),
backfill_reserving(false),
flushes_in_progress(0),
pg_stats_publish_lock("PG::pg_stats_publish_lock"),
pg_stats_publish_valid(false),
osr(osd->osr_registry.lookup_or_create(p, (stringify(p)))),
finish_sync_event(NULL),
scrub_after_recovery(false),
active_pushes(0),
recovery_state(this),
pg_id(p),
peer_features(CEPH_FEATURES_SUPPORTED_DEFAULT),
acting_features(CEPH_FEATURES_SUPPORTED_DEFAULT),
upacting_features(CEPH_FEATURES_SUPPORTED_DEFAULT),
do_sort_bitwise(false),
last_epoch(0)
{
#ifdef PG_DEBUG_REFS
osd->add_pgid(p, this);
#endif
osr->shard_hint = p;
}
PG::~PG()
{
#ifdef PG_DEBUG_REFS
osd->remove_pgid(info.pgid, this);
#endif
}
void PG::lock_suspend_timeout(ThreadPool::TPHandle &handle)
{
handle.suspend_tp_timeout();
lock();
handle.reset_tp_timeout();
}
void PG::lock(bool no_lockdep) const
{
_lock.Lock(no_lockdep);
// if we have unrecorded dirty state with the lock dropped, there is a bug
assert(!dirty_info);
assert(!dirty_big_info);
dout(30) << "lock" << dendl;
}
std::string PG::gen_prefix() const
{
stringstream out;
OSDMapRef mapref = osdmap_ref;
if (_lock.is_locked_by_me()) {
out << "osd." << osd->whoami
<< " pg_epoch: " << (mapref ? mapref->get_epoch():0)
<< " " << *this << " ";
} else {
out << "osd." << osd->whoami
<< " pg_epoch: " << (mapref ? mapref->get_epoch():0)
<< " pg[" << info.pgid << "(unlocked)] ";
}
return out.str();
}
/********* PG **********/
void PG::proc_master_log(
ObjectStore::Transaction& t, pg_info_t &oinfo,
pg_log_t &olog, pg_missing_t& omissing, pg_shard_t from)
{
dout(10) << "proc_master_log for osd." << from << ": "
<< olog << " " << omissing << dendl;
assert(!is_peered() && is_primary());
// merge log into our own log to build master log. no need to
// make any adjustments to their missing map; we are taking their
// log to be authoritative (i.e., their entries are by definitely
// non-divergent).
merge_log(t, oinfo, olog, from);
peer_info[from] = oinfo;
dout(10) << " peer osd." << from << " now " << oinfo << " " << omissing << dendl;
might_have_unfound.insert(from);
// See doc/dev/osd_internals/last_epoch_started
if (oinfo.last_epoch_started > info.last_epoch_started) {
info.last_epoch_started = oinfo.last_epoch_started;
dirty_info = true;
}
if (info.history.merge(oinfo.history))
dirty_info = true;
assert(cct->_conf->osd_find_best_info_ignore_history_les ||
info.last_epoch_started >= info.history.last_epoch_started);
peer_missing[from].claim(omissing);
}
void PG::proc_replica_log(
ObjectStore::Transaction& t,
pg_info_t &oinfo, pg_log_t &olog, pg_missing_t& omissing,
pg_shard_t from)
{
dout(10) << "proc_replica_log for osd." << from << ": "
<< oinfo << " " << olog << " " << omissing << dendl;
pg_log.proc_replica_log(t, oinfo, olog, omissing, from);
peer_info[from] = oinfo;
dout(10) << " peer osd." << from << " now " << oinfo << " " << omissing << dendl;
might_have_unfound.insert(from);
for (map<hobject_t, pg_missing_item, hobject_t::ComparatorWithDefault>::const_iterator i =
omissing.get_items().begin();
i != omissing.get_items().end();
++i) {
dout(20) << " after missing " << i->first << " need " << i->second.need
<< " have " << i->second.have << dendl;
}
peer_missing[from].claim(omissing);
}
bool PG::proc_replica_info(
pg_shard_t from, const pg_info_t &oinfo, epoch_t send_epoch)
{
map<pg_shard_t, pg_info_t>::iterator p = peer_info.find(from);
if (p != peer_info.end() && p->second.last_update == oinfo.last_update) {
dout(10) << " got dup osd." << from << " info " << oinfo << ", identical to ours" << dendl;
return false;
}
if (!get_osdmap()->has_been_up_since(from.osd, send_epoch)) {
dout(10) << " got info " << oinfo << " from down osd." << from
<< " discarding" << dendl;
return false;
}
dout(10) << " got osd." << from << " " << oinfo << dendl;
assert(is_primary());
peer_info[from] = oinfo;
might_have_unfound.insert(from);
unreg_next_scrub();
if (info.history.merge(oinfo.history))
dirty_info = true;
reg_next_scrub();
// stray?
if (!is_up(from) && !is_acting(from)) {
dout(10) << " osd." << from << " has stray content: " << oinfo << dendl;
stray_set.insert(from);
if (is_clean()) {
purge_strays();
}
}
// was this a new info? if so, update peers!
if (p == peer_info.end())
update_heartbeat_peers();
return true;
}
void PG::remove_snap_mapped_object(
ObjectStore::Transaction &t, const hobject_t &soid)
{
t.remove(
coll,
ghobject_t(soid, ghobject_t::NO_GEN, pg_whoami.shard));
clear_object_snap_mapping(&t, soid);
}
void PG::clear_object_snap_mapping(
ObjectStore::Transaction *t, const hobject_t &soid)
{
OSDriver::OSTransaction _t(osdriver.get_transaction(t));
if (soid.snap < CEPH_MAXSNAP) {
int r = snap_mapper.remove_oid(
soid,
&_t);
if (!(r == 0 || r == -ENOENT)) {
derr << __func__ << ": remove_oid returned " << cpp_strerror(r) << dendl;
ceph_abort();
}
}
}
void PG::update_object_snap_mapping(
ObjectStore::Transaction *t, const hobject_t &soid, const set<snapid_t> &snaps)
{
OSDriver::OSTransaction _t(osdriver.get_transaction(t));
assert(soid.snap < CEPH_MAXSNAP);
int r = snap_mapper.remove_oid(
soid,
&_t);
if (!(r == 0 || r == -ENOENT)) {
derr << __func__ << ": remove_oid returned " << cpp_strerror(r) << dendl;
ceph_abort();
}
snap_mapper.add_oid(
soid,
snaps,
&_t);
}
void PG::merge_log(
ObjectStore::Transaction& t, pg_info_t &oinfo, pg_log_t &olog, pg_shard_t from)
{
PGLogEntryHandler rollbacker{this, &t};
pg_log.merge_log(
t, oinfo, olog, from, info, &rollbacker, dirty_info, dirty_big_info);
}
void PG::rewind_divergent_log(ObjectStore::Transaction& t, eversion_t newhead)
{
PGLogEntryHandler rollbacker{this, &t};
pg_log.rewind_divergent_log(
t, newhead, info, &rollbacker, dirty_info, dirty_big_info);
}
/*
* Process information from a replica to determine if it could have any
* objects that i need.
*
* TODO: if the missing set becomes very large, this could get expensive.
* Instead, we probably want to just iterate over our unfound set.
*/
bool PG::search_for_missing(
const pg_info_t &oinfo, const pg_missing_t &omissing,
pg_shard_t from,
RecoveryCtx *ctx)
{
unsigned num_unfound_before = missing_loc.num_unfound();
bool found_missing = missing_loc.add_source_info(
from, oinfo, omissing, get_sort_bitwise(), ctx->handle);
if (found_missing && num_unfound_before != missing_loc.num_unfound())
publish_stats_to_osd();
if (found_missing &&
(get_osdmap()->get_features(CEPH_ENTITY_TYPE_OSD, NULL) &
CEPH_FEATURE_OSD_ERASURE_CODES)) {
pg_info_t tinfo(oinfo);
tinfo.pgid.shard = pg_whoami.shard;
(*(ctx->info_map))[from.osd].push_back(
make_pair(
pg_notify_t(
from.shard, pg_whoami.shard,
get_osdmap()->get_epoch(),
get_osdmap()->get_epoch(),
tinfo),
past_intervals));
}
return found_missing;
}
bool PG::MissingLoc::readable_with_acting(
const hobject_t &hoid,
const set<pg_shard_t> &acting) const {
if (!needs_recovery(hoid)) return true;
auto missing_loc_entry = missing_loc.find(hoid);
if (missing_loc_entry == missing_loc.end()) return false;
const set<pg_shard_t> &locs = missing_loc_entry->second;
dout(10) << __func__ << ": locs:" << locs << dendl;
set<pg_shard_t> have_acting;
for (set<pg_shard_t>::const_iterator i = locs.begin();
i != locs.end();
++i) {
if (acting.count(*i))
have_acting.insert(*i);
}
return (*is_readable)(have_acting);
}
void PG::MissingLoc::add_batch_sources_info(
const set<pg_shard_t> &sources, ThreadPool::TPHandle* handle)
{
dout(10) << __func__ << ": adding sources in batch " << sources.size() << dendl;
unsigned loop = 0;
for (map<hobject_t, pg_missing_item, hobject_t::ComparatorWithDefault>::const_iterator i = needs_recovery_map.begin();
i != needs_recovery_map.end();
++i) {
if (handle && ++loop >= g_conf->osd_loop_before_reset_tphandle) {
handle->reset_tp_timeout();
loop = 0;
}
missing_loc[i->first].insert(sources.begin(), sources.end());
missing_loc_sources.insert(sources.begin(), sources.end());
}
}
bool PG::MissingLoc::add_source_info(
pg_shard_t fromosd,
const pg_info_t &oinfo,
const pg_missing_t &omissing,
bool sort_bitwise,
ThreadPool::TPHandle* handle)
{
bool found_missing = false;
unsigned loop = 0;
// found items?
for (map<hobject_t,pg_missing_item, hobject_t::ComparatorWithDefault>::const_iterator p = needs_recovery_map.begin();
p != needs_recovery_map.end();
++p) {
const hobject_t &soid(p->first);
eversion_t need = p->second.need;
if (handle && ++loop >= g_conf->osd_loop_before_reset_tphandle) {
handle->reset_tp_timeout();
loop = 0;
}
if (oinfo.last_update < need) {
dout(10) << "search_for_missing " << soid << " " << need
<< " also missing on osd." << fromosd
<< " (last_update " << oinfo.last_update << " < needed " << need << ")"
<< dendl;
continue;
}
if (!oinfo.last_backfill.is_max() &&
oinfo.last_backfill_bitwise != sort_bitwise) {
dout(10) << "search_for_missing " << soid << " " << need
<< " also missing on osd." << fromosd
<< " (last_backfill " << oinfo.last_backfill
<< " but with wrong sort order)"
<< dendl;
continue;
}
if (cmp(p->first, oinfo.last_backfill, sort_bitwise) >= 0) {
// FIXME: this is _probably_ true, although it could conceivably
// be in the undefined region! Hmm!
dout(10) << "search_for_missing " << soid << " " << need
<< " also missing on osd." << fromosd
<< " (past last_backfill " << oinfo.last_backfill << ")"
<< dendl;
continue;
}
if (oinfo.last_complete < need) {
if (omissing.is_missing(soid)) {
dout(10) << "search_for_missing " << soid << " " << need
<< " also missing on osd." << fromosd << dendl;
continue;
}
}
dout(10) << "search_for_missing " << soid << " " << need
<< " is on osd." << fromosd << dendl;
missing_loc[soid].insert(fromosd);
missing_loc_sources.insert(fromosd);
found_missing = true;
}
dout(20) << "needs_recovery_map missing " << needs_recovery_map << dendl;
return found_missing;
}
void PG::discover_all_missing(map<int, map<spg_t,pg_query_t> > &query_map)
{
auto &missing = pg_log.get_missing();
assert(have_unfound());
dout(10) << __func__ << " "
<< missing.num_missing() << " missing, "
<< get_num_unfound() << " unfound"
<< dendl;
std::set<pg_shard_t>::const_iterator m = might_have_unfound.begin();
std::set<pg_shard_t>::const_iterator mend = might_have_unfound.end();
for (; m != mend; ++m) {
pg_shard_t peer(*m);
if (!get_osdmap()->is_up(peer.osd)) {
dout(20) << __func__ << " skipping down osd." << peer << dendl;
continue;
}
map<pg_shard_t, pg_info_t>::const_iterator iter = peer_info.find(peer);
if (iter != peer_info.end() &&
(iter->second.is_empty() || iter->second.dne())) {
// ignore empty peers
continue;
}
// If we've requested any of this stuff, the pg_missing_t information
// should be on its way.
// TODO: coalsce requested_* into a single data structure
if (peer_missing.find(peer) != peer_missing.end()) {
dout(20) << __func__ << ": osd." << peer
<< ": we already have pg_missing_t" << dendl;
continue;
}
if (peer_log_requested.find(peer) != peer_log_requested.end()) {
dout(20) << __func__ << ": osd." << peer
<< ": in peer_log_requested" << dendl;
continue;
}
if (peer_missing_requested.find(peer) != peer_missing_requested.end()) {
dout(20) << __func__ << ": osd." << peer
<< ": in peer_missing_requested" << dendl;
continue;
}
// Request missing
dout(10) << __func__ << ": osd." << peer << ": requesting pg_missing_t"
<< dendl;
peer_missing_requested.insert(peer);
query_map[peer.osd][spg_t(info.pgid.pgid, peer.shard)] =
pg_query_t(
pg_query_t::FULLLOG,
peer.shard, pg_whoami.shard,
info.history, get_osdmap()->get_epoch());
}
}
/******* PG ***********/
bool PG::needs_recovery() const
{
assert(is_primary());
auto &missing = pg_log.get_missing();
if (missing.num_missing()) {
dout(10) << __func__ << " primary has " << missing.num_missing()
<< " missing" << dendl;
return true;
}
assert(!actingbackfill.empty());
set<pg_shard_t>::const_iterator end = actingbackfill.end();
set<pg_shard_t>::const_iterator a = actingbackfill.begin();
for (; a != end; ++a) {
if (*a == get_primary()) continue;
pg_shard_t peer = *a;
map<pg_shard_t, pg_missing_t>::const_iterator pm = peer_missing.find(peer);
if (pm == peer_missing.end()) {
dout(10) << __func__ << " osd." << peer << " doesn't have missing set"
<< dendl;
continue;
}
if (pm->second.num_missing()) {
dout(10) << __func__ << " osd." << peer << " has "
<< pm->second.num_missing() << " missing" << dendl;
return true;
}
}
dout(10) << __func__ << " is recovered" << dendl;
return false;
}
bool PG::needs_backfill() const
{
assert(is_primary());
// We can assume that only possible osds that need backfill
// are on the backfill_targets vector nodes.
set<pg_shard_t>::const_iterator end = backfill_targets.end();
set<pg_shard_t>::const_iterator a = backfill_targets.begin();
for (; a != end; ++a) {
pg_shard_t peer = *a;
map<pg_shard_t, pg_info_t>::const_iterator pi = peer_info.find(peer);
if (!pi->second.last_backfill.is_max()) {
dout(10) << __func__ << " osd." << peer << " has last_backfill " << pi->second.last_backfill << dendl;
return true;
}
}
dout(10) << __func__ << " does not need backfill" << dendl;
return false;
}
bool PG::_calc_past_interval_range(epoch_t *start, epoch_t *end, epoch_t oldest_map)
{
if (info.history.same_interval_since) {
*end = info.history.same_interval_since;
} else {
// PG must be imported, so let's calculate the whole range.
*end = osdmap_ref->get_epoch();
}
// Do we already have the intervals we want?
map<epoch_t,pg_interval_t>::const_iterator pif = past_intervals.begin();
if (pif != past_intervals.end()) {
if (pif->first <= info.history.last_epoch_clean) {
dout(10) << __func__ << ": already have past intervals back to "
<< info.history.last_epoch_clean << dendl;
return false;
}
*end = pif->first;
}
*start = MAX(MAX(info.history.epoch_created,
info.history.last_epoch_clean),
oldest_map);
if (*start >= *end) {
dout(10) << __func__ << " start epoch " << *start << " >= end epoch " << *end
<< ", nothing to do" << dendl;
return false;
}
return true;
}
void PG::generate_past_intervals()
{
epoch_t cur_epoch, end_epoch;
if (!_calc_past_interval_range(&cur_epoch, &end_epoch,
osd->get_superblock().oldest_map)) {
if (info.history.same_interval_since == 0) {
info.history.same_interval_since = end_epoch;
dirty_info = true;
}
return;
}
OSDMapRef last_map, cur_map;
int primary = -1;
int up_primary = -1;
vector<int> acting, up, old_acting, old_up;
cur_map = osd->get_map(cur_epoch);
cur_map->pg_to_up_acting_osds(
get_pgid().pgid, &up, &up_primary, &acting, &primary);
epoch_t same_interval_since = cur_epoch;
dout(10) << __func__ << " over epochs " << cur_epoch << "-"
<< end_epoch << dendl;
++cur_epoch;
for (; cur_epoch <= end_epoch; ++cur_epoch) {
int old_primary = primary;
int old_up_primary = up_primary;
last_map.swap(cur_map);
old_up.swap(up);
old_acting.swap(acting);
cur_map = osd->get_map(cur_epoch);
pg_t pgid = get_pgid().pgid;
if (last_map->get_pools().count(pgid.pool()))
pgid = pgid.get_ancestor(last_map->get_pg_num(pgid.pool()));
cur_map->pg_to_up_acting_osds(pgid, &up, &up_primary, &acting, &primary);
boost::scoped_ptr<IsPGRecoverablePredicate> recoverable(
get_is_recoverable_predicate());
std::stringstream debug;
bool new_interval = pg_interval_t::check_new_interval(
old_primary,
primary,
old_acting,
acting,
old_up_primary,
up_primary,
old_up,
up,
same_interval_since,
info.history.last_epoch_clean,
cur_map,
last_map,
pgid,
recoverable.get(),
&past_intervals,
&debug);
if (new_interval) {
dout(10) << debug.str() << dendl;
same_interval_since = cur_epoch;
}
}
// PG import needs recalculated same_interval_since
if (info.history.same_interval_since == 0) {
assert(same_interval_since);
dout(10) << __func__ << " fix same_interval_since " << same_interval_since << " pg " << *this << dendl;
dout(10) << __func__ << " past_intervals " << past_intervals << dendl;
// Fix it
info.history.same_interval_since = same_interval_since;
}
// record our work.
dirty_info = true;
dirty_big_info = true;
}
/*
* Trim past_intervals.
*
* This gets rid of all the past_intervals that happened before last_epoch_clean.
*/
void PG::trim_past_intervals()
{
std::map<epoch_t,pg_interval_t>::iterator pif = past_intervals.begin();
std::map<epoch_t,pg_interval_t>::iterator end = past_intervals.end();
while (pif != end) {
if (pif->second.last >= info.history.last_epoch_clean)
return;
dout(10) << __func__ << ": trimming " << pif->second << dendl;
past_intervals.erase(pif++);
dirty_big_info = true;
}
}
bool PG::adjust_need_up_thru(const OSDMapRef osdmap)
{
epoch_t up_thru = osdmap->get_up_thru(osd->whoami);
if (need_up_thru &&
up_thru >= info.history.same_interval_since) {
dout(10) << "adjust_need_up_thru now " << up_thru << ", need_up_thru now false" << dendl;
need_up_thru = false;
return true;
}
return false;
}
void PG::remove_down_peer_info(const OSDMapRef osdmap)
{
// Remove any downed osds from peer_info
bool removed = false;
map<pg_shard_t, pg_info_t>::iterator p = peer_info.begin();
while (p != peer_info.end()) {
if (!osdmap->is_up(p->first.osd)) {
dout(10) << " dropping down osd." << p->first << " info " << p->second << dendl;
peer_missing.erase(p->first);
peer_log_requested.erase(p->first);
peer_missing_requested.erase(p->first);
peer_info.erase(p++);
removed = true;
} else
++p;
}
// if we removed anyone, update peers (which include peer_info)
if (removed)
update_heartbeat_peers();
check_recovery_sources(osdmap);
}
/*
* Returns true unless there is a non-lost OSD in might_have_unfound.
*/
bool PG::all_unfound_are_queried_or_lost(const OSDMapRef osdmap) const
{
assert(is_primary());
set<pg_shard_t>::const_iterator peer = might_have_unfound.begin();
set<pg_shard_t>::const_iterator mend = might_have_unfound.end();
for (; peer != mend; ++peer) {
if (peer_missing.count(*peer))
continue;
map<pg_shard_t, pg_info_t>::const_iterator iter = peer_info.find(*peer);
if (iter != peer_info.end() &&
(iter->second.is_empty() || iter->second.dne()))
continue;
if (!osdmap->exists(peer->osd))
continue;
const osd_info_t &osd_info(osdmap->get_info(peer->osd));
if (osd_info.lost_at <= osd_info.up_from) {
// If there is even one OSD in might_have_unfound that isn't lost, we
// still might retrieve our unfound.
return false;
}
}
dout(10) << "all_unfound_are_queried_or_lost all of might_have_unfound " << might_have_unfound
<< " have been queried or are marked lost" << dendl;
return true;
}
void PG::build_prior(std::unique_ptr<PriorSet> &prior_set)
{
if (1) {
// sanity check
for (map<pg_shard_t,pg_info_t>::iterator it = peer_info.begin();
it != peer_info.end();
++it) {
assert(info.history.last_epoch_started >= it->second.history.last_epoch_started);
}
}
prior_set.reset(
new PriorSet(
pool.info.ec_pool(),
get_pgbackend()->get_is_recoverable_predicate(),
*get_osdmap(),
past_intervals,
up,
acting,
info,
this));
PriorSet &prior(*prior_set.get());
if (prior.pg_down) {
state_set(PG_STATE_DOWN);
}
if (get_osdmap()->get_up_thru(osd->whoami) < info.history.same_interval_since) {
dout(10) << "up_thru " << get_osdmap()->get_up_thru(osd->whoami)
<< " < same_since " << info.history.same_interval_since
<< ", must notify monitor" << dendl;
need_up_thru = true;
} else {
dout(10) << "up_thru " << get_osdmap()->get_up_thru(osd->whoami)
<< " >= same_since " << info.history.same_interval_since
<< ", all is well" << dendl;
need_up_thru = false;
}
set_probe_targets(prior_set->probe);
}
void PG::clear_primary_state()
{
dout(10) << "clear_primary_state" << dendl;
// clear peering state
stray_set.clear();
peer_log_requested.clear();
peer_missing_requested.clear();
peer_info.clear();
peer_missing.clear();
need_up_thru = false;
peer_last_complete_ondisk.clear();
peer_activated.clear();
min_last_complete_ondisk = eversion_t();
pg_trim_to = eversion_t();
might_have_unfound.clear();
projected_log = PGLog::IndexedLog();
last_update_ondisk = eversion_t();
snap_trimq.clear();
finish_sync_event = 0; // so that _finish_recovery doesn't go off in another thread
missing_loc.clear();
pg_log.reset_recovery_pointers();
scrubber.reserved_peers.clear();
scrub_after_recovery = false;
agent_clear();
}
PG::Scrubber::Scrubber()
: reserved(false), reserve_failed(false),
epoch_start(0),
active(false), queue_snap_trim(false),
waiting_on(0), shallow_errors(0), deep_errors(0), fixed(0),
must_scrub(false), must_deep_scrub(false), must_repair(false),
auto_repair(false),
num_digest_updates_pending(0),
state(INACTIVE),
deep(false),
seed(0)
{}
PG::Scrubber::~Scrubber() {}
/**
* find_best_info
*
* Returns an iterator to the best info in infos sorted by:
* 1) Prefer newer last_update
* 2) Prefer longer tail if it brings another info into contiguity
* 3) Prefer current primary
*/
map<pg_shard_t, pg_info_t>::const_iterator PG::find_best_info(
const map<pg_shard_t, pg_info_t> &infos,
bool restrict_to_up_acting,