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cifs: handle cache lookup errors different than -ENOENT

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lookup_cache_entry() might return an error different than -ENOENT
(e.g. from ->char2uni), so handle those as well in
cache_refresh_path().

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara 2023-01-17 19:00:41 -03:00 committed by Steve French
parent 8064f711c6
commit 3deddb77fd
1 changed files with 9 additions and 2 deletions
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11
fs/cifs/dfs_cache.c
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@ -644,7 +644,9 @@ static struct cache_entry *__lookup_cache_entry(const char *path, unsigned int h
*
* Use whole path components in the match. Must be called with htable_rw_lock held.
*
* Return cached entry if successful.
* Return ERR_PTR(-ENOENT) if the entry is not found.
* Return error ptr otherwise.
*/
static struct cache_entry *lookup_cache_entry(const char *path)
{
@ -789,8 +791,13 @@ static struct cache_entry *cache_refresh_path(const unsigned int xid,
down_read(&htable_rw_lock);
ce = lookup_cache_entry(path);
if (!IS_ERR(ce) && !force_refresh && !cache_entry_expired(ce))
if (!IS_ERR(ce)) {
if (!force_refresh && !cache_entry_expired(ce))
return ce;
} else if (PTR_ERR(ce) != -ENOENT) {
up_read(&htable_rw_lock);
return ce;
}
/*
* Unlock shared access as we don't want to hold any locks while getting
@ -822,7 +829,7 @@ static struct cache_entry *cache_refresh_path(const unsigned int xid,
if (rc)
ce = ERR_PTR(rc);
}
} else {
} else if (PTR_ERR(ce) == -ENOENT) {
ce = add_cache_entry_locked(refs, numrefs);
}