From: Steve French <stfrench@microsoft.com>
Date: Mon, 19 Apr 2021 23:22:37 -0500
Subject: [PATCH] smb3: limit noisy error
Git-commit: 423333bcba248c6b65e7eac1a0b8eef57c9eac72
References: bsc#1190317
Patch-mainline: v5.13-rc1

For servers which don't support copy_range (SMB3 CopyChunk), the
logging of:
 CIFS: VFS: \\server\share refcpy ioctl error -95 getting resume key
can fill the client logs and make debugging real problems more
difficult.  Change the -EOPNOTSUPP on copy_range to a "warn once"

Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
 fs/cifs/smb2ops.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 5ccc36d98dad..dd0eb665b680 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1567,7 +1567,10 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 			NULL, 0 /* no input */, CIFSMaxBufSize,
 			(char **)&res_key, &ret_data_len);
 
-	if (rc) {
+	if (rc == -EOPNOTSUPP) {
+		pr_warn_once("Server share %s does not support copy range\n", tcon->treeName);
+		goto req_res_key_exit;
+	} else if (rc) {
 		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 		goto req_res_key_exit;
 	}
-- 
2.33.0