From: Shyam Prasad N <sprasad@microsoft.com>
Date: Thu, 29 Apr 2021 07:53:18 +0000
Subject: [PATCH] cifs: detect dead connections only when echoes are enabled.
Git-commit: f4916649f98e2c7bdba38c6597a98c456c17317d
References: bsc#1190317
Patch-mainline: v5.13-rc1
We can detect server unresponsiveness only if echoes are enabled.
Echoes can be disabled under two scenarios:
1. The connection is low on credits, so we've disabled echoes/oplocks.
2. The connection has not seen any request till now (other than
negotiate/sess-setup), which is when we enable these two, based on
the credits available.
So this fix will check for dead connection, only when echo is enabled.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
CC: <stable@vger.kernel.org> # v5.8+
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
fs/cifs/connect.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 121d8b4535b0..becd5f807787 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -476,6 +476,7 @@ server_unresponsive(struct TCP_Server_Info *server)
*/
if ((server->tcpStatus == CifsGood ||
server->tcpStatus == CifsNeedNegotiate) &&
+ (!server->ops->can_echo || server->ops->can_echo(server)) &&
time_after(jiffies, server->lstrp + 3 * server->echo_interval)) {
cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n",
(3 * server->echo_interval) / HZ);
--
2.33.0