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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "ScrubStore.h"
#include "osd/osd_types.h"
#include "common/scrub_types.h"
#include "include/rados/rados_types.hpp"
using std::ostringstream;
using std::string;
using std::vector;
using ceph::bufferlist;
namespace {
ghobject_t make_scrub_object(const spg_t& pgid)
{
ostringstream ss;
ss << "scrub_" << pgid;
return pgid.make_temp_ghobject(ss.str());
}
string first_object_key(int64_t pool)
{
auto hoid = hobject_t(object_t(),
"",
0,
0x00000000,
pool,
"");
hoid.build_hash_cache();
return "SCRUB_OBJ_" + hoid.to_str();
}
// the object_key should be unique across pools
string to_object_key(int64_t pool, const librados::object_id_t& oid)
{
auto hoid = hobject_t(object_t(oid.name),
oid.locator, // key
oid.snap,
0, // hash
pool,
oid.nspace);
hoid.build_hash_cache();
return "SCRUB_OBJ_" + hoid.to_str();
}
string last_object_key(int64_t pool)
{
auto hoid = hobject_t(object_t(),
"",
0,
0xffffffff,
pool,
"");
hoid.build_hash_cache();
return "SCRUB_OBJ_" + hoid.to_str();
}
string first_snap_key(int64_t pool)
{
// scrub object is per spg_t object, so we can misuse the hash (pg.seed) for
// the representing the minimal and maximum keys. and this relies on how
// hobject_t::to_str() works: hex(pool).hex(revhash).
auto hoid = hobject_t(object_t(),
"",
0,
0x00000000,
pool,
"");
hoid.build_hash_cache();
return "SCRUB_SS_" + hoid.to_str();
}
string to_snap_key(int64_t pool, const librados::object_id_t& oid)
{
auto hoid = hobject_t(object_t(oid.name),
oid.locator, // key
oid.snap,
0x77777777, // hash
pool,
oid.nspace);
hoid.build_hash_cache();
return "SCRUB_SS_" + hoid.to_str();
}
string last_snap_key(int64_t pool)
{
auto hoid = hobject_t(object_t(),
"",
0,
0xffffffff,
pool,
"");
hoid.build_hash_cache();
return "SCRUB_SS_" + hoid.to_str();
}
}
namespace Scrub {
Store*
Store::create(ObjectStore* store,
ObjectStore::Transaction* t,
const spg_t& pgid,
const coll_t& coll)
{
ceph_assert(store);
ceph_assert(t);
ghobject_t oid = make_scrub_object(pgid);
t->touch(coll, oid);
return new Store{coll, oid, store};
}
Store::Store(const coll_t& coll, const ghobject_t& oid, ObjectStore* store)
: coll(coll),
hoid(oid),
driver(store, coll, hoid),
backend(&driver)
{}
Store::~Store()
{
ceph_assert(results.empty());
}
void Store::add_error(int64_t pool, const inconsistent_obj_wrapper& e)
{
add_object_error(pool, e);
}
void Store::add_object_error(int64_t pool, const inconsistent_obj_wrapper& e)
{
bufferlist bl;
e.encode(bl);
results[to_object_key(pool, e.object)] = bl;
}
void Store::add_error(int64_t pool, const inconsistent_snapset_wrapper& e)
{
add_snap_error(pool, e);
}
void Store::add_snap_error(int64_t pool, const inconsistent_snapset_wrapper& e)
{
bufferlist bl;
e.encode(bl);
results[to_snap_key(pool, e.object)] = bl;
}
bool Store::empty() const
{
return results.empty();
}
void Store::flush(ObjectStore::Transaction* t)
{
if (t) {
OSDriver::OSTransaction txn = driver.get_transaction(t);
backend.set_keys(results, &txn);
}
results.clear();
}
void Store::cleanup(ObjectStore::Transaction* t)
{
t->remove(coll, hoid);
}
std::vector<bufferlist>
Store::get_snap_errors(int64_t pool,
const librados::object_id_t& start,
uint64_t max_return) const
{
const string begin = (start.name.empty() ?
first_snap_key(pool) : to_snap_key(pool, start));
const string end = last_snap_key(pool);
return get_errors(begin, end, max_return);
}
std::vector<bufferlist>
Store::get_object_errors(int64_t pool,
const librados::object_id_t& start,
uint64_t max_return) const
{
const string begin = (start.name.empty() ?
first_object_key(pool) : to_object_key(pool, start));
const string end = last_object_key(pool);
return get_errors(begin, end, max_return);
}
std::vector<bufferlist>
Store::get_errors(const string& begin,
const string& end,
uint64_t max_return) const
{
vector<bufferlist> errors;
auto next = std::make_pair(begin, bufferlist{});
while (max_return && !backend.get_next(next.first, &next)) {
if (next.first >= end)
break;
errors.push_back(next.second);
max_return--;
}
return errors;
}
} // namespace Scrub
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