/*
* __txn_rollback_to_stable_btree_walk --
* Called for each open handle - choose to either skip or wipe the commits
*/
static int
__txn_rollback_to_stable_btree_walk(
WT_SESSION_IMPL *session, wt_timestamp_t *rollback_timestamp)
{
WT_DECL_RET;
WT_PAGE *page;
WT_REF *ref;
/* Walk the tree, marking commits aborted where appropriate. */
ref = NULL;
while ((ret = __wt_tree_walk_custom_skip(session, &ref,
__txn_rollback_to_stable_custom_skip,
NULL, WT_READ_NO_EVICT)) == 0 && ref != NULL) {
page = ref->page;
/* Review deleted page saved to the ref */
if (ref->page_del != NULL && __wt_timestamp_cmp(
rollback_timestamp, &ref->page_del->timestamp) < 0)
__wt_delete_page_rollback(session, ref);
if (!__wt_page_is_modified(page))
continue;
WT_RET(__txn_abort_newer_updates(
session, ref, rollback_timestamp));
}
return (ret);
}
/*
* __wt_txn_rollback --
* Roll back the current transaction.
*/
int
__wt_txn_rollback(WT_SESSION_IMPL *session, const char *cfg[])
{
WT_DECL_RET;
WT_TXN *txn;
WT_TXN_OP *op;
u_int i;
WT_UNUSED(cfg);
txn = &session->txn;
if (!F_ISSET(txn, WT_TXN_RUNNING))
WT_RET_MSG(session, EINVAL, "No transaction is active");
/* Rollback notification. */
if (txn->notify != NULL)
WT_TRET(txn->notify->notify(txn->notify, (WT_SESSION *)session,
txn->id, 0));
/* Rollback updates. */
for (i = 0, op = txn->mod; i < txn->mod_count; i++, op++) {
/* Metadata updates are never rolled back. */
if (op->fileid == WT_METAFILE_ID)
continue;
switch (op->type) {
case WT_TXN_OP_BASIC:
case WT_TXN_OP_INMEM:
WT_ASSERT(session, op->u.upd->txnid == txn->id);
op->u.upd->txnid = WT_TXN_ABORTED;
break;
case WT_TXN_OP_REF:
__wt_delete_page_rollback(session, op->u.ref);
break;
case WT_TXN_OP_TRUNCATE_COL:
case WT_TXN_OP_TRUNCATE_ROW:
/*
* Nothing to do: these operations are only logged for
* recovery. The in-memory changes will be rolled back
* with a combination of WT_TXN_OP_REF and
* WT_TXN_OP_INMEM operations.
*/
break;
}
/* Free any memory allocated for the operation. */
__wt_txn_op_free(session, op);
}
txn->mod_count = 0;
__wt_txn_release(session);
return (ret);
}
/*
* __wt_txn_rollback --
* Roll back the current transaction.
*/
int
__wt_txn_rollback(WT_SESSION_IMPL *session, const char *cfg[])
{
WT_DECL_RET;
WT_TXN *txn;
WT_TXN_OP *op;
u_int i;
bool readonly;
WT_UNUSED(cfg);
txn = &session->txn;
readonly = txn->mod_count == 0;
WT_ASSERT(session, F_ISSET(txn, WT_TXN_RUNNING));
/* Rollback notification. */
if (txn->notify != NULL)
WT_TRET(txn->notify->notify(txn->notify, (WT_SESSION *)session,
txn->id, 0));
/* Rollback updates. */
for (i = 0, op = txn->mod; i < txn->mod_count; i++, op++) {
/* Metadata updates are never rolled back. */
if (op->fileid == WT_METAFILE_ID)
continue;
switch (op->type) {
case WT_TXN_OP_BASIC:
case WT_TXN_OP_BASIC_TS:
case WT_TXN_OP_INMEM:
WT_ASSERT(session, op->u.upd->txnid == txn->id);
WT_ASSERT(session,
S2C(session)->cache->las_fileid == 0 ||
op->fileid != S2C(session)->cache->las_fileid);
op->u.upd->txnid = WT_TXN_ABORTED;
break;
case WT_TXN_OP_REF:
__wt_delete_page_rollback(session, op->u.ref);
break;
case WT_TXN_OP_TRUNCATE_COL:
case WT_TXN_OP_TRUNCATE_ROW:
/*
* Nothing to do: these operations are only logged for
* recovery. The in-memory changes will be rolled back
* with a combination of WT_TXN_OP_REF and
* WT_TXN_OP_INMEM operations.
*/
break;
}
/* Free any memory allocated for the operation. */
__wt_txn_op_free(session, op);
}
txn->mod_count = 0;
__wt_txn_release(session);
/*
* We're between transactions, if we need to block for eviction, it's
* a good time to do so. Note that we must ignore any error return
* because the user's data is committed.
*/
if (!readonly)
(void)__wt_cache_eviction_check(session, false, false, NULL);
return (ret);
}
