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cifs: fix potential race with cifsd thread

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To avoid racing with demultiplex thread while it is handling data on
socket, use cifs_signal_cifsd_for_reconnect() helper for marking
current server to reconnect and let the demultiplex thread handle the
rest.

Fixes: dca65818c8 ("cifs: use a different reconnect helper for non-cifsd threads")
Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara 2022-03-31 15:01:50 -03:00 committed by Steve French
parent 3123109284
commit 687127c81a
2 changed files with 2 additions and 2 deletions
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2
fs/cifs/connect.c
View file

@ -4465,7 +4465,7 @@ static int tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *tco
*/
if (rc && server->current_fullpath != server->origin_fullpath) {
server->current_fullpath = server->origin_fullpath;
cifs_reconnect(tcon->ses->server, true);
cifs_signal_cifsd_for_reconnect(server, true);
}
dfs_cache_free_tgts(tl);

2
fs/cifs/netmisc.c
View file

@ -896,7 +896,7 @@ map_and_check_smb_error(struct mid_q_entry *mid, bool logErr)
if (class == ERRSRV && code == ERRbaduid) {
cifs_dbg(FYI, "Server returned 0x%x, reconnecting session...\n",
code);
cifs_reconnect(mid->server, false);
cifs_signal_cifsd_for_reconnect(mid->server, false);
}
}