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Add journal fsync to stabilize/rollback

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This commit is contained in:
Vitaliy Filippov
2020-03-09 00:35:58 +03:00
parent c863543bfe
commit c3737ae3ff
7 changed files with 193 additions and 103 deletions
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blockstore_rollback.cpp
+71 -29
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@@ -2,6 +2,10 @@
int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
{
if (PRIV(op)->op_state)
{
return continue_rollback(op);
}
obj_ver_id* v;
int i, todo = op->len;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
@@ -110,6 +114,70 @@ int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = 1;
return 1;
}
int blockstore_impl_t::continue_rollback(blockstore_op_t *op)
{
if (PRIV(op)->op_state == 2)
goto resume_2;
else if (PRIV(op)->op_state == 3)
goto resume_3;
else if (PRIV(op)->op_state == 5)
goto resume_5;
else
return 1;
resume_2:
// Release used journal sectors
release_journal_sectors(op);
resume_3:
if (!disable_journal_fsync)
{
io_uring_sqe *sqe = get_sqe();
if (!sqe)
{
return 0;
}
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = 4;
return 1;
}
resume_5:
obj_ver_id* v;
int i;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// Erase dirty_db entries
auto rm_end = dirty_db.lower_bound((obj_ver_id){
.oid = v->oid,
.version = UINT64_MAX,
});
rm_end--;
auto rm_start = rm_end;
while (1)
{
if (rm_end->first.oid != v->oid)
break;
else if (rm_end->first.version <= v->version)
break;
rm_start = rm_end;
if (rm_end == dirty_db.begin())
break;
rm_end--;
}
if (rm_end != rm_start)
erase_dirty(rm_start, rm_end, UINT64_MAX);
}
journal.trim();
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 1;
}
@@ -126,37 +194,11 @@ void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t
PRIV(op)->pending_ops--;
if (PRIV(op)->pending_ops == 0)
{
// Release used journal sectors
release_journal_sectors(op);
obj_ver_id* v;
int i;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
PRIV(op)->op_state++;
if (!continue_stable(op))
{
// Erase dirty_db entries
auto rm_end = dirty_db.lower_bound((obj_ver_id){
.oid = v->oid,
.version = UINT64_MAX,
});
rm_end--;
auto rm_start = rm_end;
while (1)
{
if (rm_end->first.oid != v->oid)
break;
else if (rm_end->first.version <= v->version)
break;
rm_start = rm_end;
if (rm_end == dirty_db.begin())
break;
rm_end--;
}
if (rm_end != rm_start)
erase_dirty(rm_start, rm_end, UINT64_MAX);
submit_queue.push_front(op);
}
journal.trim();
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
}
}