SMB1 mount fix from Paulo

SMB1 mount fix from Paulo

[Steve French]

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Fix from Paulo attached for SMB1 mount error (and merged into
cifs-2.6.git for-next).  See attached.

cifs.ko maps NT_STATUS_NOT_FOUND to -EIO when SMB1 servers couldn't
resolve referral paths.  Proceed to tree connect when we get -EIO from
dfs_get_referral() as well.


-- 
Thanks,

Steve

[-- Attachment #2: 0002-cifs-fix-smb1-mount-regression.patch --]
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From 52067f0ce38cf11dae51a3f99de99e1a3ebe94c5 Mon Sep 17 00:00:00 2001
From: Paulo Alcantara <pc@manguebit.com>
Date: Tue, 23 May 2023 17:38:38 -0300
Subject: [PATCH 2/6] cifs: fix smb1 mount regression

cifs.ko maps NT_STATUS_NOT_FOUND to -EIO when SMB1 servers couldn't
resolve referral paths.  Proceed to tree connect when we get -EIO from
dfs_get_referral() as well.

Reported-by: Kris Karas (Bug Reporting) <bugs-a21@moonlit-rail.com>
Fixes: 8e3554150d6c ("cifs: fix sharing of DFS connections")
Cc: stable@vger.kernel.org # v6.2+
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/cifs/dfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/dfs.c b/fs/cifs/dfs.c
index a93dbca1411b..2f93bf8c3325 100644
--- a/fs/cifs/dfs.c
+++ b/fs/cifs/dfs.c
@@ -303,7 +303,7 @@ int dfs_mount_share(struct cifs_mount_ctx *mnt_ctx, bool *isdfs)
 	if (!nodfs) {
 		rc = dfs_get_referral(mnt_ctx, ctx->UNC + 1, NULL, NULL);
 		if (rc) {
-			if (rc != -ENOENT && rc != -EOPNOTSUPP)
+			if (rc != -ENOENT && rc != -EOPNOTSUPP && rc != -EIO)
 				goto out;
 			nodfs = true;
 		}
-- 
2.34.1