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 5ccc36d..dd0eb66 100644 (file)
--- 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;
        }