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authorSteve French <smfrench@gmail.com>2016-09-26 21:23:08 +0200
committerSteve French <smfrench@gmail.com>2016-10-14 02:46:51 +0200
commit18dd8e1a65ddae2351d0f0d6dd4a334f441fc5fa (patch)
treede8dd8e2fa23c3c11c12e5a46bbea8f359a059bf /fs/cifs/smb2inode.c
parentSMB3: Add mount parameter to allow user to override max credits (diff)
downloadlinux-18dd8e1a65ddae2351d0f0d6dd4a334f441fc5fa.tar.xz
linux-18dd8e1a65ddae2351d0f0d6dd4a334f441fc5fa.zip
Do not send SMB3 SET_INFO request if nothing is changing
[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@primarydata.com> CC: Stable <stable@vger.kernel.org>
Diffstat (limited to 'fs/cifs/smb2inode.c')
-rw-r--r--fs/cifs/smb2inode.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index 4f0231e685a9..1238cd3552f9 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -266,9 +266,15 @@ smb2_set_file_info(struct inode *inode, const char *full_path,
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);