The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From a249cc8bc2e2fed680047d326eb9a50756724198 Mon Sep 17 00:00:00 2001
From: Aurelien Aptel <aaptel@xxxxxxxx>
Date: Thu, 4 Mar 2021 17:42:21 +0000
Subject: [PATCH] cifs: fix credit accounting for extra channel
With multichannel, operations like the queries
from "ls -lR" can cause all credits to be used and
errors to be returned since max_credits was not
being set correctly on the secondary channels and
thus the client was requesting 0 credits incorrectly
in some cases (which can lead to not having
enough credits to perform any operation on that
channel).
Signed-off-by: Aurelien Aptel <aaptel@xxxxxxxx>
CC: <stable@xxxxxxxxxxxxxxx> # v5.8+
Reviewed-by: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 112692300fb6..68642e3d4270 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1429,6 +1429,11 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx)
tcp_ses->min_offload = ctx->min_offload;
tcp_ses->tcpStatus = CifsNeedNegotiate;
+ if ((ctx->max_credits < 20) || (ctx->max_credits > 60000))
+ tcp_ses->max_credits = SMB2_MAX_CREDITS_AVAILABLE;
+ else
+ tcp_ses->max_credits = ctx->max_credits;
+
tcp_ses->nr_targets = 1;
tcp_ses->ignore_signature = ctx->ignore_signature;
/* thread spawned, put it on the list */
@@ -2832,11 +2837,6 @@ static int mount_get_conns(struct smb3_fs_context *ctx, struct cifs_sb_info *cif
*nserver = server;
- if ((ctx->max_credits < 20) || (ctx->max_credits > 60000))
- server->max_credits = SMB2_MAX_CREDITS_AVAILABLE;
- else
- server->max_credits = ctx->max_credits;
-
/* get a reference to a SMB session */
ses = cifs_get_smb_ses(server, ctx);
if (IS_ERR(ses)) {
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 183a3a868d7b..63d517b9f2ff 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -230,6 +230,7 @@ cifs_ses_add_channel(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses,
ctx.noautotune = ses->server->noautotune;
ctx.sockopt_tcp_nodelay = ses->server->tcp_nodelay;
ctx.echo_interval = ses->server->echo_interval / HZ;
+ ctx.max_credits = ses->server->max_credits;
/*
* This will be used for encoding/decoding user/domain/pw
