3.16.40-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Steve French <smfrench@xxxxxxxxx> commit 18dd8e1a65ddae2351d0f0d6dd4a334f441fc5fa upstream. [CIFS] We had cases where we sent a SMB2/SMB3 setinfo request with all timestamp (and DOS attribute) fields marked as 0 (ie do not change) e.g. on chmod or chown. Signed-off-by: Steve French <steve.french@xxxxxxxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- fs/cifs/smb2inode.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -266,9 +266,15 @@ smb2_set_file_info(struct inode *inode, struct tcon_link *tlink; int rc; + if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && + (buf->LastWriteTime == 0) && (buf->ChangeTime) && + (buf->Attributes == 0)) + return 0; /* would be a no op, no sense sending this */ + tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) return PTR_ERR(tlink); + rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path, FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf, SMB2_OP_SET_INFO);