/
PrimaryLogPG.cc
15407 lines (13832 loc) · 461 KB
/
PrimaryLogPG.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>
* Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
*
* Author: Loic Dachary <loic@dachary.org>
*
* 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 "boost/tuple/tuple.hpp"
#include "boost/intrusive_ptr.hpp"
#include "PG.h"
#include "PrimaryLogPG.h"
#include "OSD.h"
#include "OpRequest.h"
#include "ScrubStore.h"
#include "Session.h"
#include "objclass/objclass.h"
#include "common/errno.h"
#include "common/scrub_types.h"
#include "common/perf_counters.h"
#include "messages/MOSDOp.h"
#include "messages/MOSDBackoff.h"
#include "messages/MOSDPGTrim.h"
#include "messages/MOSDPGScan.h"
#include "messages/MOSDRepScrub.h"
#include "messages/MOSDPGBackfill.h"
#include "messages/MOSDPGBackfillRemove.h"
#include "messages/MOSDPGUpdateLogMissing.h"
#include "messages/MOSDPGUpdateLogMissingReply.h"
#include "messages/MCommandReply.h"
#include "messages/MOSDScrubReserve.h"
#include "mds/inode_backtrace.h" // Ugh
#include "common/EventTrace.h"
#include "common/config.h"
#include "include/compat.h"
#include "mon/MonClient.h"
#include "osdc/Objecter.h"
#include "json_spirit/json_spirit_value.h"
#include "json_spirit/json_spirit_reader.h"
#include "include/ceph_assert.h" // json_spirit clobbers it
#include "include/rados/rados_types.hpp"
#ifdef WITH_LTTNG
#include "tracing/osd.h"
#else
#define tracepoint(...)
#endif
#define dout_context cct
#define dout_subsys ceph_subsys_osd
#define DOUT_PREFIX_ARGS this, osd->whoami, get_osdmap()
#undef dout_prefix
#define dout_prefix _prefix(_dout, this)
template <typename T>
static ostream& _prefix(std::ostream *_dout, T *pg) {
return pg->gen_prefix(*_dout);
}
#include <sstream>
#include <utility>
#include <errno.h>
MEMPOOL_DEFINE_OBJECT_FACTORY(PrimaryLogPG, replicatedpg, osd);
PGLSFilter::PGLSFilter() : cct(nullptr)
{
}
PGLSFilter::~PGLSFilter()
{
}
/**
* The CopyCallback class defines an interface for completions to the
* copy_start code. Users of the copy infrastructure must implement
* one and give an instance of the class to start_copy.
*
* The implementer is responsible for making sure that the CopyCallback
* can associate itself with the correct copy operation.
*/
class PrimaryLogPG::CopyCallback : public GenContext<CopyCallbackResults> {
protected:
CopyCallback() {}
/**
* results.get<0>() is the return code: 0 for success; -ECANCELED if
* the operation was cancelled by the local OSD; -errno for other issues.
* results.get<1>() is a pointer to a CopyResults object, which you are
* responsible for deleting.
*/
void finish(CopyCallbackResults results_) override = 0;
public:
/// Provide the final size of the copied object to the CopyCallback
~CopyCallback() override {}
};
template <typename T>
class PrimaryLogPG::BlessedGenContext : public GenContext<T> {
PrimaryLogPGRef pg;
unique_ptr<GenContext<T>> c;
epoch_t e;
public:
BlessedGenContext(PrimaryLogPG *pg, GenContext<T> *c, epoch_t e)
: pg(pg), c(c), e(e) {}
void finish(T t) override {
pg->lock();
if (pg->pg_has_reset_since(e))
c.reset();
else
c.release()->complete(t);
pg->unlock();
}
bool sync_finish(T t) {
// we assume here all blessed/wrapped Contexts can complete synchronously.
c.release()->complete(t);
return true;
}
};
GenContext<ThreadPool::TPHandle&> *PrimaryLogPG::bless_gencontext(
GenContext<ThreadPool::TPHandle&> *c) {
return new BlessedGenContext<ThreadPool::TPHandle&>(
this, c, get_osdmap_epoch());
}
template <typename T>
class PrimaryLogPG::UnlockedBlessedGenContext : public GenContext<T> {
PrimaryLogPGRef pg;
unique_ptr<GenContext<T>> c;
epoch_t e;
public:
UnlockedBlessedGenContext(PrimaryLogPG *pg, GenContext<T> *c, epoch_t e)
: pg(pg), c(c), e(e) {}
void finish(T t) override {
if (pg->pg_has_reset_since(e))
c.reset();
else
c.release()->complete(t);
}
bool sync_finish(T t) {
// we assume here all blessed/wrapped Contexts can complete synchronously.
c.release()->complete(t);
return true;
}
};
GenContext<ThreadPool::TPHandle&> *PrimaryLogPG::bless_unlocked_gencontext(
GenContext<ThreadPool::TPHandle&> *c) {
return new UnlockedBlessedGenContext<ThreadPool::TPHandle&>(
this, c, get_osdmap_epoch());
}
class PrimaryLogPG::BlessedContext : public Context {
PrimaryLogPGRef pg;
unique_ptr<Context> c;
epoch_t e;
public:
BlessedContext(PrimaryLogPG *pg, Context *c, epoch_t e)
: pg(pg), c(c), e(e) {}
void finish(int r) override {
pg->lock();
if (pg->pg_has_reset_since(e))
c.reset();
else
c.release()->complete(r);
pg->unlock();
}
bool sync_finish(int r) {
// we assume here all blessed/wrapped Contexts can complete synchronously.
c.release()->complete(r);
return true;
}
};
Context *PrimaryLogPG::bless_context(Context *c) {
return new BlessedContext(this, c, get_osdmap_epoch());
}
class PrimaryLogPG::C_PG_ObjectContext : public Context {
PrimaryLogPGRef pg;
ObjectContext *obc;
public:
C_PG_ObjectContext(PrimaryLogPG *p, ObjectContext *o) :
pg(p), obc(o) {}
void finish(int r) override {
pg->object_context_destructor_callback(obc);
}
};
struct OnReadComplete : public Context {
PrimaryLogPG *pg;
PrimaryLogPG::OpContext *opcontext;
OnReadComplete(
PrimaryLogPG *pg,
PrimaryLogPG::OpContext *ctx) : pg(pg), opcontext(ctx) {}
void finish(int r) override {
opcontext->finish_read(pg);
}
~OnReadComplete() override {}
};
class PrimaryLogPG::C_OSD_AppliedRecoveredObject : public Context {
PrimaryLogPGRef pg;
ObjectContextRef obc;
public:
C_OSD_AppliedRecoveredObject(PrimaryLogPG *p, ObjectContextRef o) :
pg(p), obc(o) {}
bool sync_finish(int r) override {
pg->_applied_recovered_object(obc);
return true;
}
void finish(int r) override {
pg->lock();
pg->_applied_recovered_object(obc);
pg->unlock();
}
};
class PrimaryLogPG::C_OSD_CommittedPushedObject : public Context {
PrimaryLogPGRef pg;
epoch_t epoch;
eversion_t last_complete;
public:
C_OSD_CommittedPushedObject(
PrimaryLogPG *p, epoch_t epoch, eversion_t lc) :
pg(p), epoch(epoch), last_complete(lc) {
}
void finish(int r) override {
pg->_committed_pushed_object(epoch, last_complete);
}
};
class PrimaryLogPG::C_OSD_AppliedRecoveredObjectReplica : public Context {
PrimaryLogPGRef pg;
public:
explicit C_OSD_AppliedRecoveredObjectReplica(PrimaryLogPG *p) :
pg(p) {}
bool sync_finish(int r) override {
pg->_applied_recovered_object_replica();
return true;
}
void finish(int r) override {
pg->lock();
pg->_applied_recovered_object_replica();
pg->unlock();
}
};
// OpContext
void PrimaryLogPG::OpContext::start_async_reads(PrimaryLogPG *pg)
{
inflightreads = 1;
list<pair<boost::tuple<uint64_t, uint64_t, unsigned>,
pair<bufferlist*, Context*> > > in;
in.swap(pending_async_reads);
pg->pgbackend->objects_read_async(
obc->obs.oi.soid,
in,
new OnReadComplete(pg, this), pg->get_pool().fast_read);
}
void PrimaryLogPG::OpContext::finish_read(PrimaryLogPG *pg)
{
ceph_assert(inflightreads > 0);
--inflightreads;
if (async_reads_complete()) {
ceph_assert(pg->in_progress_async_reads.size());
ceph_assert(pg->in_progress_async_reads.front().second == this);
pg->in_progress_async_reads.pop_front();
// Restart the op context now that all reads have been
// completed. Read failures will be handled by the op finisher
pg->execute_ctx(this);
}
}
class CopyFromCallback : public PrimaryLogPG::CopyCallback {
public:
PrimaryLogPG::CopyResults *results = nullptr;
PrimaryLogPG::OpContext *ctx;
OSDOp &osd_op;
CopyFromCallback(PrimaryLogPG::OpContext *ctx, OSDOp &osd_op)
: ctx(ctx), osd_op(osd_op) {
}
~CopyFromCallback() override {}
void finish(PrimaryLogPG::CopyCallbackResults results_) override {
results = results_.get<1>();
int r = results_.get<0>();
// for finish_copyfrom
ctx->user_at_version = results->user_version;
if (r >= 0) {
ctx->pg->execute_ctx(ctx);
} else {
if (r != -ECANCELED) { // on cancel just toss it out; client resends
if (ctx->op)
ctx->pg->osd->reply_op_error(ctx->op, r);
} else if (results->should_requeue) {
if (ctx->op)
ctx->pg->requeue_op(ctx->op);
}
ctx->pg->close_op_ctx(ctx);
}
}
bool is_temp_obj_used() {
return results->started_temp_obj;
}
uint64_t get_data_size() {
return results->object_size;
}
};
struct CopyFromFinisher : public PrimaryLogPG::OpFinisher {
CopyFromCallback *copy_from_callback;
explicit CopyFromFinisher(CopyFromCallback *copy_from_callback)
: copy_from_callback(copy_from_callback) {
}
int execute() override {
// instance will be destructed after this method completes
copy_from_callback->ctx->pg->finish_copyfrom(copy_from_callback);
return 0;
}
};
// ======================
// PGBackend::Listener
void PrimaryLogPG::on_local_recover(
const hobject_t &hoid,
const ObjectRecoveryInfo &_recovery_info,
ObjectContextRef obc,
bool is_delete,
ObjectStore::Transaction *t
)
{
dout(10) << __func__ << ": " << hoid << dendl;
ObjectRecoveryInfo recovery_info(_recovery_info);
clear_object_snap_mapping(t, hoid);
if (!is_delete && recovery_info.soid.is_snap()) {
OSDriver::OSTransaction _t(osdriver.get_transaction(t));
set<snapid_t> snaps;
dout(20) << " snapset " << recovery_info.ss << dendl;
auto p = recovery_info.ss.clone_snaps.find(hoid.snap);
if (p != recovery_info.ss.clone_snaps.end()) {
snaps.insert(p->second.begin(), p->second.end());
dout(20) << " snaps " << snaps << dendl;
snap_mapper.add_oid(
recovery_info.soid,
snaps,
&_t);
} else {
derr << __func__ << " " << hoid << " had no clone_snaps" << dendl;
}
}
if (!is_delete && pg_log.get_missing().is_missing(recovery_info.soid) &&
pg_log.get_missing().get_items().find(recovery_info.soid)->second.need > recovery_info.version) {
ceph_assert(is_primary());
const pg_log_entry_t *latest = pg_log.get_log().objects.find(recovery_info.soid)->second;
if (latest->op == pg_log_entry_t::LOST_REVERT &&
latest->reverting_to == recovery_info.version) {
dout(10) << " got old revert version " << recovery_info.version
<< " for " << *latest << dendl;
recovery_info.version = latest->version;
// update the attr to the revert event version
recovery_info.oi.prior_version = recovery_info.oi.version;
recovery_info.oi.version = latest->version;
bufferlist bl;
encode(recovery_info.oi, bl,
get_osdmap()->get_features(CEPH_ENTITY_TYPE_OSD, nullptr));
ceph_assert(!pool.info.is_erasure());
t->setattr(coll, ghobject_t(recovery_info.soid), OI_ATTR, bl);
if (obc)
obc->attr_cache[OI_ATTR] = bl;
}
}
// keep track of active pushes for scrub
++active_pushes;
if (recovery_info.version > pg_log.get_can_rollback_to()) {
/* This can only happen during a repair, and even then, it would
* be one heck of a race. If we are repairing the object, the
* write in question must be fully committed, so it's not valid
* to roll it back anyway (and we'll be rolled forward shortly
* anyway) */
PGLogEntryHandler h{this, t};
pg_log.roll_forward_to(recovery_info.version, &h);
}
recover_got(recovery_info.soid, recovery_info.version);
if (is_primary()) {
if (!is_delete) {
obc->obs.exists = true;
bool got = obc->get_recovery_read();
ceph_assert(got);
ceph_assert(recovering.count(obc->obs.oi.soid));
recovering[obc->obs.oi.soid] = obc;
obc->obs.oi = recovery_info.oi; // may have been updated above
}
t->register_on_applied(new C_OSD_AppliedRecoveredObject(this, obc));
publish_stats_to_osd();
ceph_assert(missing_loc.needs_recovery(hoid));
if (!is_delete)
missing_loc.add_location(hoid, pg_whoami);
release_backoffs(hoid);
if (!is_unreadable_object(hoid)) {
auto unreadable_object_entry = waiting_for_unreadable_object.find(hoid);
if (unreadable_object_entry != waiting_for_unreadable_object.end()) {
dout(20) << " kicking unreadable waiters on " << hoid << dendl;
requeue_ops(unreadable_object_entry->second);
waiting_for_unreadable_object.erase(unreadable_object_entry);
}
}
} else {
t->register_on_applied(
new C_OSD_AppliedRecoveredObjectReplica(this));
}
t->register_on_commit(
new C_OSD_CommittedPushedObject(
this,
get_osdmap_epoch(),
info.last_complete));
// update pg
dirty_info = true;
write_if_dirty(*t);
}
void PrimaryLogPG::on_global_recover(
const hobject_t &soid,
const object_stat_sum_t &stat_diff,
bool is_delete)
{
info.stats.stats.sum.add(stat_diff);
missing_loc.recovered(soid);
publish_stats_to_osd();
dout(10) << "pushed " << soid << " to all replicas" << dendl;
map<hobject_t, ObjectContextRef>::iterator i = recovering.find(soid);
ceph_assert(i != recovering.end());
if (i->second && i->second->rwstate.recovery_read_marker) {
// recover missing won't have had an obc, but it gets filled in
// during on_local_recover
ceph_assert(i->second);
list<OpRequestRef> requeue_list;
i->second->drop_recovery_read(&requeue_list);
requeue_ops(requeue_list);
}
backfills_in_flight.erase(soid);
recovering.erase(i);
finish_recovery_op(soid);
release_backoffs(soid);
auto degraded_object_entry = waiting_for_degraded_object.find(soid);
if (degraded_object_entry != waiting_for_degraded_object.end()) {
dout(20) << " kicking degraded waiters on " << soid << dendl;
requeue_ops(degraded_object_entry->second);
waiting_for_degraded_object.erase(degraded_object_entry);
}
auto unreadable_object_entry = waiting_for_unreadable_object.find(soid);
if (unreadable_object_entry != waiting_for_unreadable_object.end()) {
dout(20) << " kicking unreadable waiters on " << soid << dendl;
requeue_ops(unreadable_object_entry->second);
waiting_for_unreadable_object.erase(unreadable_object_entry);
}
finish_degraded_object(soid);
}
void PrimaryLogPG::on_peer_recover(
pg_shard_t peer,
const hobject_t &soid,
const ObjectRecoveryInfo &recovery_info)
{
publish_stats_to_osd();
// done!
peer_missing[peer].got(soid, recovery_info.version);
missing_loc.add_location(soid, peer);
}
void PrimaryLogPG::begin_peer_recover(
pg_shard_t peer,
const hobject_t soid)
{
peer_missing[peer].revise_have(soid, eversion_t());
}
void PrimaryLogPG::schedule_recovery_work(
GenContext<ThreadPool::TPHandle&> *c)
{
osd->queue_recovery_context(this, c);
}
void PrimaryLogPG::send_message_osd_cluster(
int peer, Message *m, epoch_t from_epoch)
{
osd->send_message_osd_cluster(peer, m, from_epoch);
}
void PrimaryLogPG::send_message_osd_cluster(
Message *m, Connection *con)
{
osd->send_message_osd_cluster(m, con);
}
void PrimaryLogPG::send_message_osd_cluster(
Message *m, const ConnectionRef& con)
{
osd->send_message_osd_cluster(m, con);
}
void PrimaryLogPG::on_primary_error(
const hobject_t &oid,
eversion_t v)
{
dout(0) << __func__ << ": oid " << oid << " version " << v << dendl;
primary_failed(oid);
primary_error(oid, v);
backfill_add_missing(oid, v);
}
void PrimaryLogPG::backfill_add_missing(
const hobject_t &oid,
eversion_t v)
{
dout(0) << __func__ << ": oid " << oid << " version " << v << dendl;
backfills_in_flight.erase(oid);
missing_loc.add_missing(oid, v, eversion_t());
}
bool PrimaryLogPG::should_send_op(
pg_shard_t peer,
const hobject_t &hoid) {
if (peer == get_primary())
return true;
ceph_assert(peer_info.count(peer));
bool should_send =
hoid.pool != (int64_t)info.pgid.pool() ||
hoid <= last_backfill_started ||
hoid <= peer_info[peer].last_backfill;
if (!should_send) {
ceph_assert(is_backfill_targets(peer));
dout(10) << __func__ << " issue_repop shipping empty opt to osd." << peer
<< ", object " << hoid
<< " beyond std::max(last_backfill_started "
<< ", peer_info[peer].last_backfill "
<< peer_info[peer].last_backfill << ")" << dendl;
return should_send;
}
if (async_recovery_targets.count(peer) && peer_missing[peer].is_missing(hoid)) {
should_send = false;
dout(10) << __func__ << " issue_repop shipping empty opt to osd." << peer
<< ", object " << hoid
<< " which is pending recovery in async_recovery_targets" << dendl;
}
return should_send;
}
ConnectionRef PrimaryLogPG::get_con_osd_cluster(
int peer, epoch_t from_epoch)
{
return osd->get_con_osd_cluster(peer, from_epoch);
}
PerfCounters *PrimaryLogPG::get_logger()
{
return osd->logger;
}
// ====================
// missing objects
bool PrimaryLogPG::is_missing_object(const hobject_t& soid) const
{
return pg_log.get_missing().get_items().count(soid);
}
void PrimaryLogPG::maybe_kick_recovery(
const hobject_t &soid)
{
eversion_t v;
bool work_started = false;
if (!missing_loc.needs_recovery(soid, &v))
return;
map<hobject_t, ObjectContextRef>::const_iterator p = recovering.find(soid);
if (p != recovering.end()) {
dout(7) << "object " << soid << " v " << v << ", already recovering." << dendl;
} else if (missing_loc.is_unfound(soid)) {
dout(7) << "object " << soid << " v " << v << ", is unfound." << dendl;
} else {
dout(7) << "object " << soid << " v " << v << ", recovering." << dendl;
PGBackend::RecoveryHandle *h = pgbackend->open_recovery_op();
if (is_missing_object(soid)) {
recover_missing(soid, v, cct->_conf->osd_client_op_priority, h);
} else if (missing_loc.is_deleted(soid)) {
prep_object_replica_deletes(soid, v, h, &work_started);
} else {
prep_object_replica_pushes(soid, v, h, &work_started);
}
pgbackend->run_recovery_op(h, cct->_conf->osd_client_op_priority);
}
}
void PrimaryLogPG::wait_for_unreadable_object(
const hobject_t& soid, OpRequestRef op)
{
ceph_assert(is_unreadable_object(soid));
maybe_kick_recovery(soid);
waiting_for_unreadable_object[soid].push_back(op);
op->mark_delayed("waiting for missing object");
}
bool PrimaryLogPG::is_degraded_or_backfilling_object(const hobject_t& soid)
{
/* The conditions below may clear (on_local_recover, before we queue
* the transaction) before we actually requeue the degraded waiters
* in on_global_recover after the transaction completes.
*/
if (waiting_for_degraded_object.count(soid))
return true;
if (pg_log.get_missing().get_items().count(soid))
return true;
ceph_assert(!acting_recovery_backfill.empty());
for (set<pg_shard_t>::iterator i = acting_recovery_backfill.begin();
i != acting_recovery_backfill.end();
++i) {
if (*i == get_primary()) continue;
pg_shard_t peer = *i;
auto peer_missing_entry = peer_missing.find(peer);
// If an object is missing on an async_recovery_target, return false.
// This will not block the op and the object is async recovered later.
if (peer_missing_entry != peer_missing.end() &&
peer_missing_entry->second.get_items().count(soid)) {
if (async_recovery_targets.count(peer))
continue;
else
return true;
}
// Object is degraded if after last_backfill AND
// we are backfilling it
if (is_backfill_targets(peer) &&
peer_info[peer].last_backfill <= soid &&
last_backfill_started >= soid &&
backfills_in_flight.count(soid))
return true;
}
return false;
}
bool PrimaryLogPG::is_degraded_on_async_recovery_target(const hobject_t& soid)
{
for (auto &i: async_recovery_targets) {
auto peer_missing_entry = peer_missing.find(i);
if (peer_missing_entry != peer_missing.end() &&
peer_missing_entry->second.get_items().count(soid)) {
dout(30) << __func__ << " " << soid << dendl;
return true;
}
}
return false;
}
void PrimaryLogPG::wait_for_degraded_object(const hobject_t& soid, OpRequestRef op)
{
ceph_assert(is_degraded_or_backfilling_object(soid) || is_degraded_on_async_recovery_target(soid));
maybe_kick_recovery(soid);
waiting_for_degraded_object[soid].push_back(op);
op->mark_delayed("waiting for degraded object");
}
void PrimaryLogPG::block_write_on_full_cache(
const hobject_t& _oid, OpRequestRef op)
{
const hobject_t oid = _oid.get_head();
dout(20) << __func__ << ": blocking object " << oid
<< " on full cache" << dendl;
objects_blocked_on_cache_full.insert(oid);
waiting_for_cache_not_full.push_back(op);
op->mark_delayed("waiting for cache not full");
}
void PrimaryLogPG::block_for_clean(
const hobject_t& oid, OpRequestRef op)
{
dout(20) << __func__ << ": blocking object " << oid
<< " on primary repair" << dendl;
waiting_for_clean_to_primary_repair.push_back(op);
op->mark_delayed("waiting for clean to repair");
}
void PrimaryLogPG::block_write_on_snap_rollback(
const hobject_t& oid, ObjectContextRef obc, OpRequestRef op)
{
dout(20) << __func__ << ": blocking object " << oid.get_head()
<< " on snap promotion " << obc->obs.oi.soid << dendl;
// otherwise, we'd have blocked in do_op
ceph_assert(oid.is_head());
ceph_assert(objects_blocked_on_snap_promotion.count(oid) == 0);
objects_blocked_on_snap_promotion[oid] = obc;
wait_for_blocked_object(obc->obs.oi.soid, op);
}
void PrimaryLogPG::block_write_on_degraded_snap(
const hobject_t& snap, OpRequestRef op)
{
dout(20) << __func__ << ": blocking object " << snap.get_head()
<< " on degraded snap " << snap << dendl;
// otherwise, we'd have blocked in do_op
ceph_assert(objects_blocked_on_degraded_snap.count(snap.get_head()) == 0);
objects_blocked_on_degraded_snap[snap.get_head()] = snap.snap;
wait_for_degraded_object(snap, op);
}
bool PrimaryLogPG::maybe_await_blocked_head(
const hobject_t &hoid,
OpRequestRef op)
{
ObjectContextRef obc;
obc = object_contexts.lookup(hoid.get_head());
if (obc) {
if (obc->is_blocked()) {
wait_for_blocked_object(obc->obs.oi.soid, op);
return true;
} else {
return false;
}
}
return false;
}
void PrimaryLogPG::wait_for_blocked_object(const hobject_t& soid, OpRequestRef op)
{
dout(10) << __func__ << " " << soid << " " << op << dendl;
waiting_for_blocked_object[soid].push_back(op);
op->mark_delayed("waiting for blocked object");
}
void PrimaryLogPG::maybe_force_recovery()
{
// no force if not in degraded/recovery/backfill states
if (!is_degraded() &&
!state_test(PG_STATE_RECOVERING |
PG_STATE_RECOVERY_WAIT |
PG_STATE_BACKFILLING |
PG_STATE_BACKFILL_WAIT |
PG_STATE_BACKFILL_TOOFULL))
return;
if (pg_log.get_log().approx_size() <
cct->_conf->osd_max_pg_log_entries *
cct->_conf->osd_force_recovery_pg_log_entries_factor)
return;
// find the oldest missing object
version_t min_version = pg_log.get_log().head.version;
hobject_t soid;
if (!pg_log.get_missing().get_rmissing().empty()) {
min_version = pg_log.get_missing().get_rmissing().begin()->first;
soid = pg_log.get_missing().get_rmissing().begin()->second;
}
ceph_assert(!acting_recovery_backfill.empty());
for (set<pg_shard_t>::iterator it = acting_recovery_backfill.begin();
it != acting_recovery_backfill.end();
++it) {
if (*it == get_primary()) continue;
pg_shard_t peer = *it;
auto it_missing = peer_missing.find(peer);
if (it_missing != peer_missing.end() &&
!it_missing->second.get_rmissing().empty()) {
const auto& min_obj = peer_missing[peer].get_rmissing().begin();
dout(20) << __func__ << " peer " << peer << " min_version " << min_obj->first
<< " oid " << min_obj->second << dendl;
if (min_version > min_obj->first) {
min_version = min_obj->first;
soid = min_obj->second;
}
}
}
// recover it
if (soid != hobject_t())
maybe_kick_recovery(soid);
}
class PGLSPlainFilter : public PGLSFilter {
string val;
public:
int init(bufferlist::const_iterator ¶ms) override
{
try {
decode(xattr, params);
decode(val, params);
} catch (buffer::error &e) {
return -EINVAL;
}
return 0;
}
~PGLSPlainFilter() override {}
bool filter(const hobject_t &obj, bufferlist& xattr_data,
bufferlist& outdata) override;
};
class PGLSParentFilter : public PGLSFilter {
inodeno_t parent_ino;
public:
CephContext* cct;
explicit PGLSParentFilter(CephContext* cct) : cct(cct) {
xattr = "_parent";
}
int init(bufferlist::const_iterator ¶ms) override
{
try {
decode(parent_ino, params);
} catch (buffer::error &e) {
return -EINVAL;
}
generic_dout(0) << "parent_ino=" << parent_ino << dendl;
return 0;
}
~PGLSParentFilter() override {}
bool filter(const hobject_t &obj, bufferlist& xattr_data,
bufferlist& outdata) override;
};
bool PGLSParentFilter::filter(const hobject_t &obj,
bufferlist& xattr_data, bufferlist& outdata)
{
auto iter = xattr_data.cbegin();
inode_backtrace_t bt;
generic_dout(0) << "PGLSParentFilter::filter" << dendl;
decode(bt, iter);
vector<inode_backpointer_t>::iterator vi;
for (vi = bt.ancestors.begin(); vi != bt.ancestors.end(); ++vi) {
generic_dout(0) << "vi->dirino=" << vi->dirino << " parent_ino=" << parent_ino << dendl;
if (vi->dirino == parent_ino) {
encode(*vi, outdata);
return true;
}
}
return false;
}
bool PGLSPlainFilter::filter(const hobject_t &obj,
bufferlist& xattr_data, bufferlist& outdata)
{
if (val.size() != xattr_data.length())
return false;
if (memcmp(val.c_str(), xattr_data.c_str(), val.size()))
return false;
return true;
}
bool PrimaryLogPG::pgls_filter(PGLSFilter *filter, hobject_t& sobj, bufferlist& outdata)
{
bufferlist bl;
// If filter has expressed an interest in an xattr, load it.
if (!filter->get_xattr().empty()) {
int ret = pgbackend->objects_get_attr(
sobj,
filter->get_xattr(),
&bl);
dout(0) << "getattr (sobj=" << sobj << ", attr=" << filter->get_xattr() << ") returned " << ret << dendl;
if (ret < 0) {
if (ret != -ENODATA || filter->reject_empty_xattr()) {
return false;
}
}
}
return filter->filter(sobj, bl, outdata);
}
int PrimaryLogPG::get_pgls_filter(bufferlist::const_iterator& iter, PGLSFilter **pfilter)
{
string type;
PGLSFilter *filter;
try {
decode(type, iter);
}
catch (buffer::error& e) {
return -EINVAL;
}
if (type.compare("parent") == 0) {
filter = new PGLSParentFilter(cct);
} else if (type.compare("plain") == 0) {
filter = new PGLSPlainFilter();
} else {
std::size_t dot = type.find(".");
if (dot == std::string::npos || dot == 0 || dot == type.size() - 1) {
return -EINVAL;
}
const std::string class_name = type.substr(0, dot);
const std::string filter_name = type.substr(dot + 1);
ClassHandler::ClassData *cls = NULL;
int r = osd->class_handler->open_class(class_name, &cls);
if (r != 0) {
derr << "Error opening class '" << class_name << "': "
<< cpp_strerror(r) << dendl;
if (r != -EPERM) // propogate permission error
r = -EINVAL;
return r;
} else {
ceph_assert(cls);
}
ClassHandler::ClassFilter *class_filter = cls->get_filter(filter_name);
if (class_filter == NULL) {
derr << "Error finding filter '" << filter_name << "' in class "
<< class_name << dendl;
return -EINVAL;
}
filter = class_filter->fn();
if (!filter) {
// Object classes are obliged to return us something, but let's
// give an error rather than asserting out.
derr << "Buggy class " << class_name << " failed to construct "
"filter " << filter_name << dendl;
return -EINVAL;
}
}
ceph_assert(filter);
int r = filter->init(iter);
if (r < 0) {
derr << "Error initializing filter " << type << ": "
<< cpp_strerror(r) << dendl;
delete filter;
return -EINVAL;
} else {
// Successfully constructed and initialized, return it.
*pfilter = filter;
return 0;
}
}
// ==========================================================
int PrimaryLogPG::do_command(
cmdmap_t cmdmap,
ostream& ss,
bufferlist& idata,
bufferlist& odata,
ConnectionRef con,
ceph_tid_t tid)
{
string prefix;
string format;
cmd_getval(cct, cmdmap, "format", format);
boost::scoped_ptr<Formatter> f(Formatter::create(format, "json-pretty", "json"));
string command;
cmd_getval(cct, cmdmap, "cmd", command);
if (command == "query") {
f->open_object_section("pg");
f->dump_string("state", pg_state_string(get_state()));
f->dump_stream("snap_trimq") << snap_trimq;