From: Steve French <stfrench@microsoft.com>
Date: Tue, 20 Apr 2021 04:22:37 +0000 (-0500)
Subject: smb3: limit noisy error
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=423333bcba248c6b65e7eac1a0b8eef57c9eac72;p=linux.git

smb3: limit noisy error

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>
---

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 5ccc36d98dadf..dd0eb665b680c 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;
 	}