mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 15:43:59 +08:00
193cdd8a29
The authority fields are supposed to be represented by a single 48-bit value. It's also supposed to represent the value as hex if it's equal to or greater than 2^32. This is documented in MS-DTYP, section 2.4.2.1. Also, fix up the max string length to account for this fix. Acked-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
|
|
* fs/cifs/cifsacl.h
|
|
*
|
|
* Copyright (c) International Business Machines Corp., 2007
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _CIFSACL_H
|
|
#define _CIFSACL_H
|
|
|
|
|
|
#define NUM_AUTHS (6) /* number of authority fields */
|
|
#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
|
|
|
|
#define READ_BIT 0x4
|
|
#define WRITE_BIT 0x2
|
|
#define EXEC_BIT 0x1
|
|
|
|
#define UBITSHIFT 6
|
|
#define GBITSHIFT 3
|
|
|
|
#define ACCESS_ALLOWED 0
|
|
#define ACCESS_DENIED 1
|
|
|
|
#define SIDOWNER 1
|
|
#define SIDGROUP 2
|
|
|
|
/*
|
|
* Security Descriptor length containing DACL with 3 ACEs (one each for
|
|
* owner, group and world).
|
|
*/
|
|
#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
|
|
sizeof(struct cifs_acl) + \
|
|
(sizeof(struct cifs_ace) * 3))
|
|
|
|
/*
|
|
* Maximum size of a string representation of a SID:
|
|
*
|
|
* The fields are unsigned values in decimal. So:
|
|
*
|
|
* u8: max 3 bytes in decimal
|
|
* u32: max 10 bytes in decimal
|
|
*
|
|
* "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
|
|
*
|
|
* For authority field, max is when all 6 values are non-zero and it must be
|
|
* represented in hex. So "-0x" + 12 hex digits.
|
|
*
|
|
* Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
|
|
*/
|
|
#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
|
|
#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
|
|
|
|
struct cifs_ntsd {
|
|
__le16 revision; /* revision level */
|
|
__le16 type;
|
|
__le32 osidoffset;
|
|
__le32 gsidoffset;
|
|
__le32 sacloffset;
|
|
__le32 dacloffset;
|
|
} __attribute__((packed));
|
|
|
|
struct cifs_sid {
|
|
__u8 revision; /* revision level */
|
|
__u8 num_subauth;
|
|
__u8 authority[NUM_AUTHS];
|
|
__le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
|
|
} __attribute__((packed));
|
|
|
|
/* size of a struct cifs_sid, sans sub_auth array */
|
|
#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
|
|
|
|
struct cifs_acl {
|
|
__le16 revision; /* revision level */
|
|
__le16 size;
|
|
__le32 num_aces;
|
|
} __attribute__((packed));
|
|
|
|
struct cifs_ace {
|
|
__u8 type;
|
|
__u8 flags;
|
|
__le16 size;
|
|
__le32 access_req;
|
|
struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
|
|
} __attribute__((packed));
|
|
|
|
#endif /* _CIFSACL_H */
|