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Implement blockstore rollback operation

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Rollback operation is required for the primary OSD to kill unstable
object versions in OSD peers so they don't occupy journal space
This commit is contained in:
Vitaliy Filippov
2020-01-24 20:18:14 +03:00
parent 98efdb78bd
commit 2b09710d6f
13 changed files with 291 additions and 55 deletions
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blockstore_flush.cpp
+3 -33
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@@ -438,7 +438,7 @@ bool journal_flusher_co::scan_dirty(int wait_base)
{
goto resume_0;
}
dirty_it = dirty_end;
dirty_it = dirty_start = dirty_end;
v.clear();
wait_count = 0;
copy_count = 0;
@@ -511,6 +511,7 @@ bool journal_flusher_co::scan_dirty(int wait_base)
);
throw std::runtime_error(err);
}
dirty_start = dirty_it;
if (dirty_it == bs->dirty_db.begin())
{
break;
@@ -593,38 +594,7 @@ void journal_flusher_co::update_clean_db()
.location = clean_loc,
};
}
dirty_it = dirty_end;
while (1)
{
if (IS_BIG_WRITE(dirty_it->second.state) && dirty_it->second.location != clean_loc)
{
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu\n", dirty_it->second.location >> bs->block_order);
#endif
bs->data_alloc->set(dirty_it->second.location >> bs->block_order, false);
}
#ifdef BLOCKSTORE_DEBUG
printf("remove usage of journal offset %lu by %lu:%lu v%lu\n", dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
int used = --bs->journal.used_sectors[dirty_it->second.journal_sector];
if (used == 0)
{
bs->journal.used_sectors.erase(dirty_it->second.journal_sector);
}
if (dirty_it == bs->dirty_db.begin())
{
break;
}
dirty_it--;
if (dirty_it->first.oid != cur.oid)
{
break;
}
}
// Then, basically, remove everything up to the current version from dirty_db...
if (dirty_it->first.oid != cur.oid)
dirty_it++;
bs->dirty_db.erase(dirty_it, std::next(dirty_end));
bs->erase_dirty(dirty_start, std::next(dirty_end), clean_loc);
}
bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)