TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ksmbd: retry iterate_dir in smb2_query_dir

Browse Source 
[ Upstream commit 2b904d61a9 ]

Some file systems do not ensure that the single call of iterate_dir
reaches the end of the directory. For example, FUSE fetches entries from
a daemon using 4KB buffer and stops fetching if entries exceed the
buffer. And then an actor of caller, KSMBD, is used to fill the entries
from the buffer.
Thus, pattern searching on FUSE, files located after the 4KB could not
be found and STATUS_NO_SUCH_FILE was returned.

Signed-off-by: Hobin Woo <hobin.woo@samsung.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Tested-by: Yoonho Shin <yoonho.shin@samsung.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hobin Woo
2024-12-05 11:31:19 +09:00
committed by Greg Kroah-Hartman
parent f53b37313a
commit 2f75da8294
2 changed files with 12 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/smb/server/smb2pdu.c
+11 -1
View File
@@ -4225,6 +4225,7 @@ static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
/* dot and dotdot entries are already reserved */
if (!strcmp(".", name) || !strcmp("..", name))
return true;
d_info->num_scan++;
if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
return true;
if (!match_pattern(name, namlen, priv->search_pattern))
@@ -4385,8 +4386,17 @@ int smb2_query_dir(struct ksmbd_work *work)
query_dir_private.info_level = req->FileInformationClass;
dir_fp->readdir_data.private = &query_dir_private;
set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
again:
d_info.num_scan = 0;
rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
/*
* num_entry can be 0 if the directory iteration stops before reaching
* the end of the directory and no file is matched with the search
* pattern.
*/
if (rc >= 0 && !d_info.num_entry && d_info.num_scan &&
d_info.out_buf_len > 0)
goto again;
/*
* req->OutputBufferLength is too small to contain even one entry.
* In this case, it immediately returns OutputBufferLength 0 to client.
fs/smb/server/vfs.h
+1
View File
@@ -43,6 +43,7 @@ struct ksmbd_dir_info {
char *rptr;
int name_len;
int out_buf_len;
int num_scan;
int num_entry;
int data_count;
int last_entry_offset;