smb3: fix mode passed in on create for modetosid mount option

When using the special SID to store the mode bits in an ACE (See
http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx)
which is enabled with mount parm "modefromsid" we were not
passing in the mode via SMB3 create (although chmod was enabled).
SMB3 create allows a security descriptor context to be passed
in (which is more atomic and thus preferable to setting the mode
bits after create via a setinfo).

This patch enables setting the mode bits on create when using
modefromsid mount option.  In addition it fixes an endian
error in the definition of the Control field flags in the SMB3
security descriptor. It also makes the ACE type of the special
SID better match the documentation (and behavior of servers
which use this to store mode bits in SMB3 ACLs).

Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index fa2533da316d..7b1c379fdf7a 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -25,6 +25,7 @@
 #define _SMB2PDU_H
 
 #include <net/sock.h>
+#include <cifsacl.h>
 
 /*
  * Note that, due to trying to use names similar to the protocol specifications,
@@ -855,6 +856,15 @@ struct crt_query_id_ctxt {
 	__u8	Name[8];
 } __packed;
 
+struct crt_sd_ctxt {
+	struct create_context ccontext;
+	__u8	Name[8];
+	struct smb3_sd sd;
+	struct smb3_acl acl;
+	/* Followed by at least 4 ACEs */
+} __packed;
+
+
 #define COPY_CHUNK_RES_KEY_SIZE	24
 struct resume_key_req {
 	char ResumeKey[COPY_CHUNK_RES_KEY_SIZE];