/*
* __wt_metadata_cursor_open --
* Opens a cursor on the metadata.
*/
int
__wt_metadata_cursor_open(
WT_SESSION_IMPL *session, const char *config, WT_CURSOR **cursorp)
{
WT_BTREE *btree;
WT_DECL_RET;
const char *open_cursor_cfg[] = {
WT_CONFIG_BASE(session, WT_SESSION_open_cursor), config, NULL };
WT_WITHOUT_DHANDLE(session, ret = __wt_open_cursor(
session, WT_METAFILE_URI, NULL, open_cursor_cfg, cursorp));
WT_RET(ret);
/*
* Retrieve the btree from the cursor, rather than the session because
* we don't always switch the metadata handle in to the session before
* entering this function.
*/
btree = ((WT_CURSOR_BTREE *)(*cursorp))->btree;
/*
* Special settings for metadata: skew eviction so metadata almost
* always stays in cache and make sure metadata is logged if possible.
*
* Test before setting so updates can't race in subsequent opens (the
* first update is safe because it's single-threaded from
* wiredtiger_open).
*/
if (btree->evict_priority == 0)
WT_WITH_BTREE(session, btree,
__wt_evict_priority_set(session, WT_EVICT_INT_SKEW));
if (F_ISSET(btree, WT_BTREE_NO_LOGGING))
F_CLR(btree, WT_BTREE_NO_LOGGING);
/* The metadata file always uses checkpoint IDs in visibility checks. */
btree->include_checkpoint_txn = true;
return (0);
}
/*
* __bloom_open_cursor --
* Open a cursor to read from a Bloom filter.
*/
static int
__bloom_open_cursor(WT_BLOOM *bloom, WT_CURSOR *owner)
{
WT_CURSOR *c;
WT_SESSION_IMPL *session;
const char *cfg[3];
if ((c = bloom->c) != NULL)
return (0);
session = bloom->session;
cfg[0] = WT_CONFIG_BASE(session, WT_SESSION_open_cursor);
cfg[1] = bloom->config;
cfg[2] = NULL;
c = NULL;
WT_RET(__wt_open_cursor(session, bloom->uri, owner, cfg, &c));
/* Bump the cache priority for Bloom filters. */
__wt_evict_priority_set(session, WT_EVICT_INT_SKEW);
bloom->c = c;
return (0);
}
