/*
* __truncate_file --
* WT_SESSION::truncate for a file.
*/
static int
__truncate_file(WT_SESSION_IMPL *session, const char *name)
{
WT_DECL_RET;
const char *filename;
uint32_t allocsize;
filename = name;
if (!WT_PREFIX_SKIP(filename, "file:"))
return (EINVAL);
/* Open and lock the file. */
WT_RET(__wt_session_get_btree(
session, name, NULL, NULL, WT_DHANDLE_EXCLUSIVE));
/* Get the allocation size. */
allocsize = S2BT(session)->allocsize;
WT_RET(__wt_session_release_btree(session));
/* Close any btree handles in the file. */
WT_WITH_DHANDLE_LOCK(session,
ret = __wt_conn_dhandle_close_all(session, name, 0));
WT_RET(ret);
/* Delete the root address and truncate the file. */
WT_RET(__wt_meta_checkpoint_clear(session, name));
WT_RET(__wt_block_manager_truncate(session, filename, allocsize));
return (0);
}
/*
* __wt_salvage --
* Salvage a single file.
*/
int
__wt_salvage(WT_SESSION_IMPL *session, const char *cfg[])
{
WT_CKPT *ckptbase;
WT_DATA_HANDLE *dhandle;
WT_DECL_RET;
dhandle = session->dhandle;
/*
* XXX
* The salvage process reads and discards previous checkpoints, so the
* underlying block manager has to ignore any previous checkpoint
* entries when creating a new checkpoint, in other words, we can't use
* the metadata checkpoint list, it has all of those checkpoint listed
* and we don't care about them. Build a clean checkpoint list and use
* it instead.
*
* Don't first clear the metadata checkpoint list and call the function
* to get a list of checkpoints: a crash between clearing the metadata
* checkpoint list and creating a new checkpoint list would look like a
* create or open of a file without a checkpoint to roll-forward from,
* and the contents of the file would be discarded.
*/
WT_RET(__wt_calloc_def(session, 2, &ckptbase));
WT_ERR(__wt_strdup(session, WT_CHECKPOINT, &ckptbase[0].name));
F_SET(&ckptbase[0], WT_CKPT_ADD);
WT_ERR(__wt_bt_salvage(session, ckptbase, cfg));
/*
* If no checkpoint was created, well, it's probably bad news, but there
* is nothing to do but clear any recorded checkpoints for the file. If
* a checkpoint was created, life is good, replace any existing list of
* checkpoints with the single new one.
*/
if (ckptbase[0].raw.data == NULL)
WT_ERR(__wt_meta_checkpoint_clear(session, dhandle->name));
else
WT_ERR(__wt_meta_ckptlist_set(
session, dhandle->name, ckptbase, NULL));
err: __wt_meta_ckptlist_free(session, &ckptbase);
return (ret);
}
/*
* __truncate_file --
* WT_SESSION::truncate for a file.
*/
static int
__truncate_file(WT_SESSION_IMPL *session, const char *name)
{
const char *filename;
filename = name;
if (!WT_PREFIX_SKIP(filename, "file:"))
return (EINVAL);
/* Close any btree handles in the file. */
WT_RET(__wt_conn_btree_close_all(session, name));
/* Delete the root address and truncate the file. */
WT_RET(__wt_meta_checkpoint_clear(session, name));
WT_RET(__wt_block_manager_truncate(session, filename));
return (0);
}
