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PGBackend.cc
1227 lines (1150 loc) · 36.8 KB
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PGBackend.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) 2013,2014 Inktank Storage, Inc.
* 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 "common/errno.h"
#include "common/scrub_types.h"
#include "ReplicatedBackend.h"
#include "ScrubStore.h"
#include "ECBackend.h"
#include "PGBackend.h"
#include "OSD.h"
#include "erasure-code/ErasureCodePlugin.h"
#include "OSDMap.h"
#include "PGLog.h"
#include "common/LogClient.h"
#include "messages/MOSDPGRecoveryDelete.h"
#include "messages/MOSDPGRecoveryDeleteReply.h"
#define dout_context cct
#define dout_subsys ceph_subsys_osd
#define DOUT_PREFIX_ARGS this
#undef dout_prefix
#define dout_prefix _prefix(_dout, this)
static ostream& _prefix(std::ostream *_dout, PGBackend *pgb) {
return pgb->get_parent()->gen_dbg_prefix(*_dout);
}
void PGBackend::recover_delete_object(const hobject_t &oid, eversion_t v,
RecoveryHandle *h)
{
assert(get_parent()->get_acting_recovery_backfill_shards().size() > 0);
for (const auto& shard : get_parent()->get_acting_recovery_backfill_shards()) {
if (shard == get_parent()->whoami_shard())
continue;
if (get_parent()->get_shard_missing(shard).is_missing(oid)) {
dout(20) << __func__ << " will remove " << oid << " " << v << " from "
<< shard << dendl;
h->deletes[shard].push_back(make_pair(oid, v));
get_parent()->begin_peer_recover(shard, oid);
}
}
}
void PGBackend::send_recovery_deletes(int prio,
const map<pg_shard_t, vector<pair<hobject_t, eversion_t> > > &deletes)
{
epoch_t min_epoch = get_parent()->get_last_peering_reset_epoch();
for (const auto& p : deletes) {
const auto& shard = p.first;
const auto& objects = p.second;
ConnectionRef con = get_parent()->get_con_osd_cluster(
shard.osd,
get_osdmap()->get_epoch());
if (!con)
continue;
auto it = objects.begin();
while (it != objects.end()) {
uint64_t cost = 0;
uint64_t deletes = 0;
spg_t target_pg = spg_t(get_parent()->get_info().pgid.pgid, shard.shard);
MOSDPGRecoveryDelete *msg =
new MOSDPGRecoveryDelete(get_parent()->whoami_shard(),
target_pg,
get_osdmap()->get_epoch(),
min_epoch);
msg->set_priority(prio);
while (it != objects.end() &&
cost < cct->_conf->osd_max_push_cost &&
deletes < cct->_conf->osd_max_push_objects) {
dout(20) << __func__ << ": sending recovery delete << " << it->first
<< " " << it->second << " to osd." << shard << dendl;
msg->objects.push_back(*it);
cost += cct->_conf->osd_push_per_object_cost;
++deletes;
++it;
}
msg->set_cost(cost);
get_parent()->send_message_osd_cluster(msg, con);
}
}
}
bool PGBackend::handle_message(OpRequestRef op)
{
switch (op->get_req()->get_type()) {
case MSG_OSD_PG_RECOVERY_DELETE:
handle_recovery_delete(op);
return true;
case MSG_OSD_PG_RECOVERY_DELETE_REPLY:
handle_recovery_delete_reply(op);
return true;
default:
break;
}
return _handle_message(op);
}
void PGBackend::handle_recovery_delete(OpRequestRef op)
{
const MOSDPGRecoveryDelete *m = static_cast<const MOSDPGRecoveryDelete *>(op->get_req());
assert(m->get_type() == MSG_OSD_PG_RECOVERY_DELETE);
dout(20) << __func__ << " " << op << dendl;
op->mark_started();
C_GatherBuilder gather(cct);
for (const auto &p : m->objects) {
get_parent()->remove_missing_object(p.first, p.second, gather.new_sub());
}
MOSDPGRecoveryDeleteReply *reply = new MOSDPGRecoveryDeleteReply;
reply->from = get_parent()->whoami_shard();
reply->set_priority(m->get_priority());
reply->pgid = spg_t(get_parent()->get_info().pgid.pgid, m->from.shard);
reply->map_epoch = m->map_epoch;
reply->min_epoch = m->min_epoch;
reply->objects = m->objects;
ConnectionRef conn = m->get_connection();
gather.set_finisher(new FunctionContext(
[=](int r) {
if (r != -EAGAIN) {
get_parent()->send_message_osd_cluster(reply, conn.get());
} else {
reply->put();
}
}));
gather.activate();
}
void PGBackend::handle_recovery_delete_reply(OpRequestRef op)
{
const MOSDPGRecoveryDeleteReply *m = static_cast<const MOSDPGRecoveryDeleteReply *>(op->get_req());
assert(m->get_type() == MSG_OSD_PG_RECOVERY_DELETE_REPLY);
dout(20) << __func__ << " " << op << dendl;
for (const auto &p : m->objects) {
ObjectRecoveryInfo recovery_info;
hobject_t oid = p.first;
recovery_info.version = p.second;
get_parent()->on_peer_recover(m->from, oid, recovery_info);
bool peers_recovered = true;
for (const auto& shard : get_parent()->get_acting_recovery_backfill_shards()) {
if (shard == get_parent()->whoami_shard())
continue;
if (get_parent()->get_shard_missing(shard).is_missing(oid)) {
dout(20) << __func__ << " " << oid << " still missing on at least "
<< shard << dendl;
peers_recovered = false;
break;
}
}
if (peers_recovered && !get_parent()->get_local_missing().is_missing(oid)) {
dout(20) << __func__ << " completed recovery, local_missing = "
<< get_parent()->get_local_missing() << dendl;
object_stat_sum_t stat_diff;
stat_diff.num_objects_recovered = 1;
get_parent()->on_global_recover(p.first, stat_diff, true);
}
}
}
void PGBackend::rollback(
const pg_log_entry_t &entry,
ObjectStore::Transaction *t)
{
struct RollbackVisitor : public ObjectModDesc::Visitor {
const hobject_t &hoid;
PGBackend *pg;
ObjectStore::Transaction t;
RollbackVisitor(
const hobject_t &hoid,
PGBackend *pg) : hoid(hoid), pg(pg) {}
void append(uint64_t old_size) override {
ObjectStore::Transaction temp;
pg->rollback_append(hoid, old_size, &temp);
temp.append(t);
temp.swap(t);
}
void setattrs(map<string, boost::optional<bufferlist> > &attrs) override {
ObjectStore::Transaction temp;
pg->rollback_setattrs(hoid, attrs, &temp);
temp.append(t);
temp.swap(t);
}
void rmobject(version_t old_version) override {
ObjectStore::Transaction temp;
pg->rollback_stash(hoid, old_version, &temp);
temp.append(t);
temp.swap(t);
}
void try_rmobject(version_t old_version) override {
ObjectStore::Transaction temp;
pg->rollback_try_stash(hoid, old_version, &temp);
temp.append(t);
temp.swap(t);
}
void create() override {
ObjectStore::Transaction temp;
pg->rollback_create(hoid, &temp);
temp.append(t);
temp.swap(t);
}
void update_snaps(const set<snapid_t> &snaps) override {
ObjectStore::Transaction temp;
pg->get_parent()->pgb_set_object_snap_mapping(hoid, snaps, &temp);
temp.append(t);
temp.swap(t);
}
void rollback_extents(
version_t gen,
const vector<pair<uint64_t, uint64_t> > &extents) override {
ObjectStore::Transaction temp;
pg->rollback_extents(gen, extents, hoid, &temp);
temp.append(t);
temp.swap(t);
}
};
assert(entry.mod_desc.can_rollback());
RollbackVisitor vis(entry.soid, this);
entry.mod_desc.visit(&vis);
t->append(vis.t);
}
struct Trimmer : public ObjectModDesc::Visitor {
const hobject_t &soid;
PGBackend *pg;
ObjectStore::Transaction *t;
Trimmer(
const hobject_t &soid,
PGBackend *pg,
ObjectStore::Transaction *t)
: soid(soid), pg(pg), t(t) {}
void rmobject(version_t old_version) override {
pg->trim_rollback_object(
soid,
old_version,
t);
}
// try_rmobject defaults to rmobject
void rollback_extents(
version_t gen,
const vector<pair<uint64_t, uint64_t> > &extents) override {
pg->trim_rollback_object(
soid,
gen,
t);
}
};
void PGBackend::rollforward(
const pg_log_entry_t &entry,
ObjectStore::Transaction *t)
{
auto dpp = get_parent()->get_dpp();
ldpp_dout(dpp, 20) << __func__ << ": entry=" << entry << dendl;
if (!entry.can_rollback())
return;
Trimmer trimmer(entry.soid, this, t);
entry.mod_desc.visit(&trimmer);
}
void PGBackend::trim(
const pg_log_entry_t &entry,
ObjectStore::Transaction *t)
{
if (!entry.can_rollback())
return;
Trimmer trimmer(entry.soid, this, t);
entry.mod_desc.visit(&trimmer);
}
void PGBackend::try_stash(
const hobject_t &hoid,
version_t v,
ObjectStore::Transaction *t)
{
t->try_rename(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
ghobject_t(hoid, v, get_parent()->whoami_shard().shard));
}
void PGBackend::remove(
const hobject_t &hoid,
ObjectStore::Transaction *t) {
assert(!hoid.is_temp());
t->remove(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard));
get_parent()->pgb_clear_object_snap_mapping(hoid, t);
}
void PGBackend::on_change_cleanup(ObjectStore::Transaction *t)
{
dout(10) << __func__ << dendl;
// clear temp
for (set<hobject_t>::iterator i = temp_contents.begin();
i != temp_contents.end();
++i) {
dout(10) << __func__ << ": Removing oid "
<< *i << " from the temp collection" << dendl;
t->remove(
coll,
ghobject_t(*i, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard));
}
temp_contents.clear();
}
int PGBackend::objects_list_partial(
const hobject_t &begin,
int min,
int max,
vector<hobject_t> *ls,
hobject_t *next)
{
assert(ls);
// Starts with the smallest generation to make sure the result list
// has the marker object (it might have multiple generations
// though, which would be filtered).
ghobject_t _next;
if (!begin.is_min())
_next = ghobject_t(begin, 0, get_parent()->whoami_shard().shard);
ls->reserve(max);
int r = 0;
if (min > max)
min = max;
while (!_next.is_max() && ls->size() < (unsigned)min) {
vector<ghobject_t> objects;
r = store->collection_list(
ch,
_next,
ghobject_t::get_max(),
max - ls->size(),
&objects,
&_next);
if (r != 0) {
derr << __func__ << " list collection " << ch << " got: " << cpp_strerror(r) << dendl;
break;
}
for (vector<ghobject_t>::iterator i = objects.begin();
i != objects.end();
++i) {
if (i->is_pgmeta() || i->hobj.is_temp()) {
continue;
}
if (i->is_no_gen()) {
ls->push_back(i->hobj);
}
}
}
if (r == 0)
*next = _next.hobj;
return r;
}
int PGBackend::objects_list_range(
const hobject_t &start,
const hobject_t &end,
vector<hobject_t> *ls,
vector<ghobject_t> *gen_obs)
{
assert(ls);
vector<ghobject_t> objects;
int r = store->collection_list(
ch,
ghobject_t(start, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
ghobject_t(end, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
INT_MAX,
&objects,
NULL);
ls->reserve(objects.size());
for (vector<ghobject_t>::iterator i = objects.begin();
i != objects.end();
++i) {
if (i->is_pgmeta() || i->hobj.is_temp()) {
continue;
}
if (i->is_no_gen()) {
ls->push_back(i->hobj);
} else if (gen_obs) {
gen_obs->push_back(*i);
}
}
return r;
}
int PGBackend::objects_get_attr(
const hobject_t &hoid,
const string &attr,
bufferlist *out)
{
bufferptr bp;
int r = store->getattr(
ch,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
attr.c_str(),
bp);
if (r >= 0 && out) {
out->clear();
out->push_back(std::move(bp));
}
return r;
}
int PGBackend::objects_get_attrs(
const hobject_t &hoid,
map<string, bufferlist> *out)
{
return store->getattrs(
ch,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
*out);
}
void PGBackend::rollback_setattrs(
const hobject_t &hoid,
map<string, boost::optional<bufferlist> > &old_attrs,
ObjectStore::Transaction *t) {
map<string, bufferlist> to_set;
assert(!hoid.is_temp());
for (map<string, boost::optional<bufferlist> >::iterator i = old_attrs.begin();
i != old_attrs.end();
++i) {
if (i->second) {
to_set[i->first] = i->second.get();
} else {
t->rmattr(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
i->first);
}
}
t->setattrs(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
to_set);
}
void PGBackend::rollback_append(
const hobject_t &hoid,
uint64_t old_size,
ObjectStore::Transaction *t) {
assert(!hoid.is_temp());
t->truncate(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
old_size);
}
void PGBackend::rollback_stash(
const hobject_t &hoid,
version_t old_version,
ObjectStore::Transaction *t) {
assert(!hoid.is_temp());
t->remove(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard));
t->collection_move_rename(
coll,
ghobject_t(hoid, old_version, get_parent()->whoami_shard().shard),
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard));
}
void PGBackend::rollback_try_stash(
const hobject_t &hoid,
version_t old_version,
ObjectStore::Transaction *t) {
assert(!hoid.is_temp());
t->remove(
coll,
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard));
t->try_rename(
coll,
ghobject_t(hoid, old_version, get_parent()->whoami_shard().shard),
ghobject_t(hoid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard));
}
void PGBackend::rollback_extents(
version_t gen,
const vector<pair<uint64_t, uint64_t> > &extents,
const hobject_t &hoid,
ObjectStore::Transaction *t) {
auto shard = get_parent()->whoami_shard().shard;
for (auto &&extent: extents) {
t->clone_range(
coll,
ghobject_t(hoid, gen, shard),
ghobject_t(hoid, ghobject_t::NO_GEN, shard),
extent.first,
extent.second,
extent.first);
}
t->remove(
coll,
ghobject_t(hoid, gen, shard));
}
void PGBackend::trim_rollback_object(
const hobject_t &hoid,
version_t old_version,
ObjectStore::Transaction *t) {
assert(!hoid.is_temp());
t->remove(
coll, ghobject_t(hoid, old_version, get_parent()->whoami_shard().shard));
}
PGBackend *PGBackend::build_pg_backend(
const pg_pool_t &pool,
const map<string,string>& profile,
Listener *l,
coll_t coll,
ObjectStore::CollectionHandle &ch,
ObjectStore *store,
CephContext *cct)
{
ErasureCodeProfile ec_profile = profile;
switch (pool.type) {
case pg_pool_t::TYPE_REPLICATED: {
return new ReplicatedBackend(l, coll, ch, store, cct);
}
case pg_pool_t::TYPE_ERASURE: {
ErasureCodeInterfaceRef ec_impl;
stringstream ss;
ceph::ErasureCodePluginRegistry::instance().factory(
profile.find("plugin")->second,
cct->_conf->get_val<std::string>("erasure_code_dir"),
ec_profile,
&ec_impl,
&ss);
assert(ec_impl);
return new ECBackend(
l,
coll,
ch,
store,
cct,
ec_impl,
pool.stripe_width);
}
default:
ceph_abort();
return NULL;
}
}
int PGBackend::be_scan_list(
ScrubMap &map,
ScrubMapBuilder &pos)
{
dout(10) << __func__ << " " << pos << dendl;
assert(!pos.done());
assert(pos.pos < pos.ls.size());
hobject_t& poid = pos.ls[pos.pos];
struct stat st;
int r = store->stat(
ch,
ghobject_t(
poid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
&st,
true);
if (r == 0) {
ScrubMap::object &o = map.objects[poid];
o.size = st.st_size;
assert(!o.negative);
store->getattrs(
ch,
ghobject_t(
poid, ghobject_t::NO_GEN, get_parent()->whoami_shard().shard),
o.attrs);
if (pos.deep) {
r = be_deep_scrub(poid, map, pos, o);
}
dout(25) << __func__ << " " << poid << dendl;
} else if (r == -ENOENT) {
dout(25) << __func__ << " " << poid << " got " << r
<< ", skipping" << dendl;
} else if (r == -EIO) {
dout(25) << __func__ << " " << poid << " got " << r
<< ", stat_error" << dendl;
ScrubMap::object &o = map.objects[poid];
o.stat_error = true;
} else {
derr << __func__ << " got: " << cpp_strerror(r) << dendl;
ceph_abort();
}
if (r == -EINPROGRESS) {
return -EINPROGRESS;
}
pos.next_object();
return 0;
}
bool PGBackend::be_compare_scrub_objects(
pg_shard_t auth_shard,
const ScrubMap::object &auth,
const object_info_t& auth_oi,
const ScrubMap::object &candidate,
shard_info_wrapper &shard_result,
inconsistent_obj_wrapper &obj_result,
ostream &errorstream)
{
enum { CLEAN, FOUND_ERROR } error = CLEAN;
if (candidate.stat_error) {
assert(shard_result.has_stat_error());
error = FOUND_ERROR;
errorstream << "candidate had a stat error";
}
if (candidate.read_error || candidate.ec_hash_mismatch || candidate.ec_size_mismatch) {
error = FOUND_ERROR;
errorstream << "candidate had a read error";
}
if (auth.digest_present && candidate.digest_present) {
if (auth.digest != candidate.digest) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "data_digest 0x" << std::hex << candidate.digest
<< " != data_digest 0x" << auth.digest << std::dec
<< " from shard " << auth_shard;
obj_result.set_data_digest_mismatch();
}
}
if (auth.omap_digest_present && candidate.omap_digest_present) {
if (auth.omap_digest != candidate.omap_digest) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "omap_digest 0x" << std::hex << candidate.omap_digest
<< " != omap_digest 0x" << auth.omap_digest << std::dec
<< " from shard " << auth_shard;
obj_result.set_omap_digest_mismatch();
}
}
if (parent->get_pool().is_replicated()) {
if (auth_oi.is_data_digest() && candidate.digest_present) {
if (auth_oi.data_digest != candidate.digest) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "data_digest 0x" << std::hex << candidate.digest
<< " != data_digest 0x" << auth_oi.data_digest << std::dec
<< " from auth oi " << auth_oi;
shard_result.set_data_digest_mismatch_info();
}
}
if (auth_oi.is_omap_digest() && candidate.omap_digest_present) {
if (auth_oi.omap_digest != candidate.omap_digest) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "omap_digest 0x" << std::hex << candidate.omap_digest
<< " != omap_digest 0x" << auth_oi.omap_digest << std::dec
<< " from auth oi " << auth_oi;
shard_result.set_omap_digest_mismatch_info();
}
}
}
if (candidate.stat_error)
return error == FOUND_ERROR;
uint64_t oi_size = be_get_ondisk_size(auth_oi.size);
if (oi_size != candidate.size) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "size " << candidate.size
<< " != size " << oi_size
<< " from auth oi " << auth_oi;
shard_result.set_size_mismatch_info();
}
if (auth.size != candidate.size) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "size " << candidate.size
<< " != size " << auth.size
<< " from shard " << auth_shard;
obj_result.set_size_mismatch();
}
for (map<string,bufferptr>::const_iterator i = auth.attrs.begin();
i != auth.attrs.end();
++i) {
// We check system keys seperately
if (i->first == OI_ATTR || i->first[0] != '_')
continue;
if (!candidate.attrs.count(i->first)) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "attr name mismatch '" << i->first << "'";
obj_result.set_attr_name_mismatch();
} else if (candidate.attrs.find(i->first)->second.cmp(i->second)) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "attr value mismatch '" << i->first << "'";
obj_result.set_attr_value_mismatch();
}
}
for (map<string,bufferptr>::const_iterator i = candidate.attrs.begin();
i != candidate.attrs.end();
++i) {
// We check system keys seperately
if (i->first == OI_ATTR || i->first[0] != '_')
continue;
if (!auth.attrs.count(i->first)) {
if (error != CLEAN)
errorstream << ", ";
error = FOUND_ERROR;
errorstream << "attr name mismatch '" << i->first << "'";
obj_result.set_attr_name_mismatch();
}
}
return error == FOUND_ERROR;
}
static int dcount(const object_info_t &oi, bool prioritize)
{
int count = 0;
// Prioritize bluestore objects when osd_distrust_data_digest is set
if (prioritize)
count += 1000;
if (oi.is_data_digest())
count++;
if (oi.is_omap_digest())
count++;
return count;
}
map<pg_shard_t, ScrubMap *>::const_iterator
PGBackend::be_select_auth_object(
const hobject_t &obj,
const map<pg_shard_t,ScrubMap*> &maps,
object_info_t *auth_oi,
map<pg_shard_t, shard_info_wrapper> &shard_map,
inconsistent_obj_wrapper &object_error,
bool &digest_match)
{
eversion_t auth_version;
bool auth_prio = false;
bufferlist first_oi_bl, first_ss_bl, first_hk_bl;
// Create list of shards with primary first so it will be auth copy all
// other things being equal.
list<pg_shard_t> shards;
for (map<pg_shard_t, ScrubMap *>::const_iterator j = maps.begin();
j != maps.end();
++j) {
if (j->first == get_parent()->whoami_shard())
continue;
shards.push_back(j->first);
}
shards.push_front(get_parent()->whoami_shard());
map<pg_shard_t, ScrubMap *>::const_iterator auth = maps.end();
digest_match = true;
for (auto &l : shards) {
bool oi_prio = false;
map<pg_shard_t, ScrubMap *>::const_iterator j = maps.find(l);
map<hobject_t, ScrubMap::object>::iterator i =
j->second->objects.find(obj);
if (i == j->second->objects.end()) {
continue;
}
string error_string;
auto& shard_info = shard_map[j->first];
if (j->first == get_parent()->whoami_shard())
shard_info.primary = true;
if (i->second.read_error) {
shard_info.set_read_error();
error_string += " read_error";
}
if (i->second.ec_hash_mismatch) {
shard_info.set_ec_hash_mismatch();
error_string += " ec_hash_mismatch";
}
if (i->second.ec_size_mismatch) {
shard_info.set_ec_size_mismatch();
error_string += " ec_size_mismatch";
}
object_info_t oi;
bufferlist bl;
map<string, bufferptr>::iterator k;
SnapSet ss;
bufferlist ss_bl, hk_bl;
if (i->second.stat_error) {
shard_info.set_stat_error();
error_string += " stat_error";
// With stat_error no further checking
// We don't need to also see a missing_object_info_attr
goto out;
}
// We won't pick an auth copy if the snapset is missing or won't decode.
assert(!obj.is_snapdir());
if (obj.is_head()) {
k = i->second.attrs.find(SS_ATTR);
if (k == i->second.attrs.end()) {
shard_info.set_snapset_missing();
error_string += " snapset_missing";
} else {
ss_bl.push_back(k->second);
try {
bufferlist::iterator bliter = ss_bl.begin();
decode(ss, bliter);
if (first_ss_bl.length() == 0) {
first_ss_bl.append(ss_bl);
} else if (!object_error.has_snapset_inconsistency() && !ss_bl.contents_equal(first_ss_bl)) {
object_error.set_snapset_inconsistency();
error_string += " snapset_inconsistency";
}
} catch (...) {
// invalid snapset, probably corrupt
shard_info.set_snapset_corrupted();
error_string += " snapset_corrupted";
}
}
}
if (parent->get_pool().is_erasure()) {
ECUtil::HashInfo hi;
k = i->second.attrs.find(ECUtil::get_hinfo_key());
if (k == i->second.attrs.end()) {
shard_info.set_hinfo_missing();
error_string += " hinfo_key_missing";
} else {
hk_bl.push_back(k->second);
try {
bufferlist::iterator bliter = hk_bl.begin();
decode(hi, bliter);
if (first_hk_bl.length() == 0) {
first_hk_bl.append(hk_bl);
} else if (!object_error.has_hinfo_inconsistency() && !hk_bl.contents_equal(first_hk_bl)) {
object_error.set_hinfo_inconsistency();
error_string += " hinfo_inconsistency";
}
} catch (...) {
// invalid snapset, probably corrupt
shard_info.set_hinfo_corrupted();
error_string += " hinfo_corrupted";
}
}
}
k = i->second.attrs.find(OI_ATTR);
if (k == i->second.attrs.end()) {
// no object info on object, probably corrupt
shard_info.set_info_missing();
error_string += " info_missing";
goto out;
}
bl.push_back(k->second);
try {
bufferlist::iterator bliter = bl.begin();
decode(oi, bliter);
} catch (...) {
// invalid object info, probably corrupt
shard_info.set_info_corrupted();
error_string += " info_corrupted";
goto out;
}
// This is automatically corrected in PG::_repair_oinfo_oid()
assert(oi.soid == obj);
if (first_oi_bl.length() == 0) {
first_oi_bl.append(bl);
} else if (!object_error.has_object_info_inconsistency() && !bl.contents_equal(first_oi_bl)) {
object_error.set_object_info_inconsistency();
error_string += " object_info_inconsistency";
}
if (i->second.size != be_get_ondisk_size(oi.size)) {
dout(5) << __func__ << " size " << i->second.size << " oi size " << oi.size << dendl;
shard_info.set_obj_size_info_mismatch();
error_string += " obj_size_info_mismatch";
}
// digest_match will only be true if computed digests are the same
if (auth_version != eversion_t()
&& auth->second->objects[obj].digest_present
&& i->second.digest_present
&& auth->second->objects[obj].digest != i->second.digest) {
digest_match = false;
dout(10) << __func__ << " digest_match = false, " << obj << " data_digest 0x" << std::hex << i->second.digest
<< " != data_digest 0x" << auth->second->objects[obj].digest << std::dec
<< dendl;
}
// Don't use this particular shard due to previous errors
// XXX: For now we can't pick one shard for repair and another's object info or snapset
if (shard_info.errors)
goto out;
// XXX: Do I want replicated only?
if (parent->get_pool().is_replicated() && cct->_conf->osd_distrust_data_digest) {
// This is a boost::optional<bool> so see if option set AND it has the value true
// We give priority to a replica where the ObjectStore like BlueStore has builtin checksum
if (j->second->has_builtin_csum && j->second->has_builtin_csum == true) {
oi_prio = true;
}
}
if (auth_version == eversion_t() || oi.version > auth_version ||
(oi.version == auth_version && dcount(oi, oi_prio) > dcount(*auth_oi, auth_prio))) {
auth = j;
*auth_oi = oi;
auth_version = oi.version;
auth_prio = oi_prio;
}
out:
// Check error_string because some errors already generated messages
if (error_string != "") {
dout(10) << __func__ << ": error(s) osd " << j->first
<< " for obj " << obj
<< "," << error_string
<< dendl;
}
// Keep scanning other shards
}
dout(10) << __func__ << ": selecting osd " << auth->first
<< " for obj " << obj
<< " with oi " << *auth_oi
<< dendl;
return auth;
}
void PGBackend::be_compare_scrubmaps(
const map<pg_shard_t,ScrubMap*> &maps,
const set<hobject_t> &master_set,
bool repair,
map<hobject_t, set<pg_shard_t>> &missing,
map<hobject_t, set<pg_shard_t>> &inconsistent,
map<hobject_t, list<pg_shard_t>> &authoritative,
map<hobject_t, pair<boost::optional<uint32_t>,
boost::optional<uint32_t>>> &missing_digest,
int &shallow_errors, int &deep_errors,
Scrub::Store *store,
const spg_t& pgid,
const vector<int> &acting,
ostream &errorstream)
{
utime_t now = ceph_clock_now();
// Check maps against master set and each other
for (set<hobject_t>::const_iterator k = master_set.begin();
k != master_set.end();
++k) {
object_info_t auth_oi;
map<pg_shard_t, shard_info_wrapper> shard_map;
inconsistent_obj_wrapper object_error{*k};
bool digest_match;
map<pg_shard_t, ScrubMap *>::const_iterator auth =
be_select_auth_object(*k, maps, &auth_oi, shard_map, object_error,
digest_match);
list<pg_shard_t> auth_list;
set<pg_shard_t> object_errors;
if (auth == maps.end()) {
object_error.set_version(0);
object_error.set_auth_missing(*k, maps, shard_map, shallow_errors,
deep_errors, get_parent()->whoami_shard());
if (object_error.has_deep_errors())
++deep_errors;
else if (object_error.has_shallow_errors())
++shallow_errors;
store->add_object_error(k->pool, object_error);
errorstream << pgid.pgid << " soid " << *k
<< ": failed to pick suitable object info\n";