/*
* __wt_block_checkpoint_unload --
* Unload a checkpoint.
*/
int
__wt_block_checkpoint_unload(
WT_SESSION_IMPL *session, WT_BLOCK *block, bool checkpoint)
{
WT_DECL_RET;
/* Verify cleanup. */
if (block->verify)
WT_TRET(__wt_verify_ckpt_unload(session, block));
/*
* If it's the live system, truncate to discard any extended blocks and
* discard the active extent lists. Hold the lock even though we're
* unloading the live checkpoint, there could be readers active in
* other checkpoints.
*/
if (!checkpoint) {
/*
* The truncate might fail if there's a file mapping (if there's
* an open checkpoint on the file), that's OK.
*/
WT_TRET_BUSY_OK(
__wt_block_truncate(session, block->fh, block->fh->size));
__wt_spin_lock(session, &block->live_lock);
__wt_block_ckpt_destroy(session, &block->live);
__wt_spin_unlock(session, &block->live_lock);
}
return (ret);
}
/*
* __meta_btree_apply --
* Apply a function to all files listed in the metadata, apart from the
* metadata file.
*/
static inline int
__meta_btree_apply(WT_SESSION_IMPL *session, WT_CURSOR *cursor,
int (*file_func)(WT_SESSION_IMPL *, const char *[]),
int (*name_func)(WT_SESSION_IMPL *, const char *, bool *),
const char *cfg[])
{
WT_DECL_RET;
int t_ret;
const char *uri;
bool skip;
/*
* Accumulate errors but continue through to the end of the metadata.
*/
while ((t_ret = cursor->next(cursor)) == 0) {
if ((t_ret = cursor->get_key(cursor, &uri)) != 0 ||
strcmp(uri, WT_METAFILE_URI) == 0) {
WT_TRET(t_ret);
continue;
}
skip = false;
if (name_func != NULL &&
(t_ret = name_func(session, uri, &skip)) != 0) {
WT_TRET(t_ret);
continue;
}
if (file_func == NULL || skip || !WT_PREFIX_MATCH(uri, "file:"))
continue;
/*
* We need to pull the handle into the session handle cache
* and make sure it's referenced to stop other internal code
* dropping the handle (e.g in LSM when cleaning up obsolete
* chunks). Holding the schema lock isn't enough.
*
* Handles that are busy are skipped without the whole
* operation failing. This deals among other cases with
* checkpoint encountering handles that are locked (e.g., for
* bulk loads or verify operations).
*/
if ((t_ret = __wt_session_get_dhandle(
session, uri, NULL, NULL, 0)) != 0) {
WT_TRET_BUSY_OK(t_ret);
continue;
}
WT_SAVE_DHANDLE(session, WT_TRET(file_func(session, cfg)));
WT_TRET(__wt_session_release_dhandle(session));
}
WT_TRET_NOTFOUND_OK(t_ret);
return (ret);
}
