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authorSteve French <stfrench@microsoft.com>2018-08-02 20:28:18 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-05 09:20:05 +0200
commit707b0d2d9d3ae4b9cde197ffa1b237e29833b2a1 (patch)
tree5698e4d651bf5de02728ab09c715de31bcf90f7c /fs/cifs
parenta94703ff8e3647f8a9a3a92a468450299a7b77e9 (diff)
smb3: Do not send SMB3 SET_INFO if nothing changed
commit fd09b7d3b352105f08b8e02f7afecf7e816380ef upstream. An earlier commit had a typo which prevented the optimization from working: commit 18dd8e1a65dd ("Do not send SMB3 SET_INFO request if nothing is changing") Thank you to Metze for noticing this. Also clear a reserved field in the FILE_BASIC_INFO struct we send that should be zero (all the other fields in that struct were set or cleared explicitly already in cifs_set_file_info). Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> CC: Stable <stable@vger.kernel.org> # 4.9.x+ Reported-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/inode.c2
-rw-r--r--fs/cifs/smb2inode.c2
2 files changed, 3 insertions, 1 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 24c19eb94fa3..a012f70bba5c 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1116,6 +1116,8 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid,
if (!server->ops->set_file_info)
return -ENOSYS;
+ info_buf.Pad = 0;
+
if (attrs->ia_valid & ATTR_ATIME) {
set_time = true;
info_buf.LastAccessTime =
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index 1238cd3552f9..0267d8cbc996 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -267,7 +267,7 @@ smb2_set_file_info(struct inode *inode, const char *full_path,
int rc;
if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
- (buf->LastWriteTime == 0) && (buf->ChangeTime) &&
+ (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
(buf->Attributes == 0))
return 0; /* would be a no op, no sense sending this */