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cifs: return ENOENT for DFS lookup_cache_entry()

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EEXIST didn't make sense to use when dfs_cache_find() couldn't find a
cache entry nor retrieve a referral target.

It also doesn't make sense cifs_dfs_query_info_nonascii_quirk() to
emulate ENOENT anymore.

Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Enzo Matsumiya 2022-05-18 11:41:05 -03:00 committed by Steve French
parent 421ef3d565
commit 337b8b0e43
3 changed files with 8 additions and 10 deletions
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6
fs/cifs/connect.c
View File

@ -3420,8 +3420,9 @@ cifs_are_all_path_components_accessible(struct TCP_Server_Info *server,
}
/*
* Check if path is remote (e.g. a DFS share). Return -EREMOTE if it is,
* otherwise 0.
* Check if path is remote (i.e. a DFS share).
*
* Return -EREMOTE if it is, otherwise 0 or -errno.
*/
static int is_path_remote(struct mount_ctx *mnt_ctx)
{
@ -3711,6 +3712,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
if (!isdfs)
goto out;
/* proceed as DFS mount */
uuid_gen(&mnt_ctx.mount_id);
rc = connect_dfs_root(&mnt_ctx, &tl);
dfs_cache_free_tgts(&tl);

6
fs/cifs/dfs_cache.c
View File

@ -654,7 +654,7 @@ static struct cache_entry *__lookup_cache_entry(const char *path, unsigned int h
return ce;
}
}
return ERR_PTR(-EEXIST);
return ERR_PTR(-ENOENT);
}
/*
@ -662,7 +662,7 @@ 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 ERR_PTR(-EEXIST) if the entry is not found.
* Return ERR_PTR(-ENOENT) if the entry is not found.
*/
static struct cache_entry *lookup_cache_entry(const char *path)
{
@ -710,7 +710,7 @@ static struct cache_entry *lookup_cache_entry(const char *path)
while (e > s && *e != sep)
e--;
}
return ERR_PTR(-EEXIST);
return ERR_PTR(-ENOENT);
}
/**

6
fs/cifs/misc.c
View File

@ -1309,7 +1309,7 @@ int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix)
* for "\<server>\<dfsname>\<linkpath>" DFS reference,
* where <dfsname> contains non-ASCII unicode symbols.
*
* Check such DFS reference and emulate -ENOENT if it is actual.
* Check such DFS reference.
*/
int cifs_dfs_query_info_nonascii_quirk(const unsigned int xid,
struct cifs_tcon *tcon,
@ -1341,10 +1341,6 @@ int cifs_dfs_query_info_nonascii_quirk(const unsigned int xid,
cifs_dbg(FYI, "DFS ref '%s' is found, emulate -EREMOTE\n",
dfspath);
rc = -EREMOTE;
} else if (rc == -EEXIST) {
cifs_dbg(FYI, "DFS ref '%s' is not found, emulate -ENOENT\n",
dfspath);
rc = -ENOENT;
} else {
cifs_dbg(FYI, "%s: dfs_cache_find returned %d\n", __func__, rc);
}