1/*
  2 *   fs/cifs/cifsacl.h
  3 *
  4 *   Copyright (c) International Business Machines  Corp., 2007
  5 *   Author(s): Steve French (sfrench@us.ibm.com)
  6 *
  7 *   This library is free software; you can redistribute it and/or modify
  8 *   it under the terms of the GNU Lesser General Public License as published
  9 *   by the Free Software Foundation; either version 2.1 of the License, or
 10 *   (at your option) any later version.
 11 *
 12 *   This library is distributed in the hope that it will be useful,
 13 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 14 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 15 *   the GNU Lesser General Public License for more details.
 16 *
 17 *   You should have received a copy of the GNU Lesser General Public License
 18 *   along with this library; if not, write to the Free Software
 19 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 20 */
 21
 22#ifndef _CIFSACL_H
 23#define _CIFSACL_H
 24
 25
 26#define NUM_AUTHS 6 /* number of authority fields */
 27#define NUM_SUBAUTHS 5 /* number of sub authority fields */
 28#define NUM_WK_SIDS 7 /* number of well known sids */
 29#define SIDNAMELENGTH 20 /* long enough for the ones we care about */
 30#define DEFSECDESCLEN 192 /* sec desc len contaiting a dacl with three aces */
 31
 32#define READ_BIT        0x4
 33#define WRITE_BIT       0x2
 34#define EXEC_BIT        0x1
 35
 36#define UBITSHIFT	6
 37#define GBITSHIFT	3
 38
 39#define ACCESS_ALLOWED	0
 40#define ACCESS_DENIED	1
 41
 42#define SIDOWNER 1
 43#define SIDGROUP 2
 44#define SIDLEN 150 /* S- 1 revision- 6 authorities- max 5 sub authorities */
 45
 46#define SID_ID_MAPPED 0
 47#define SID_ID_PENDING 1
 48#define SID_MAP_EXPIRE (3600 * HZ) /* map entry expires after one hour */
 49#define SID_MAP_RETRY (300 * HZ)   /* wait 5 minutes for next attempt to map */
 50
 51struct cifs_ntsd {
 52	__le16 revision; /* revision level */
 53	__le16 type;
 54	__le32 osidoffset;
 55	__le32 gsidoffset;
 56	__le32 sacloffset;
 57	__le32 dacloffset;
 58} __attribute__((packed));
 59
 60struct cifs_sid {
 61	__u8 revision; /* revision level */
 62	__u8 num_subauth;
 63	__u8 authority[6];
 64	__le32 sub_auth[5]; /* sub_auth[num_subauth] */
 65} __attribute__((packed));
 66
 67struct cifs_acl {
 68	__le16 revision; /* revision level */
 69	__le16 size;
 70	__le32 num_aces;
 71} __attribute__((packed));
 72
 73struct cifs_ace {
 74	__u8 type;
 75	__u8 flags;
 76	__le16 size;
 77	__le32 access_req;
 78	struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
 79} __attribute__((packed));
 80
 81struct cifs_wksid {
 82	struct cifs_sid cifssid;
 83	char sidname[SIDNAMELENGTH];
 84} __attribute__((packed));
 85
 86struct cifs_sid_id {
 87	unsigned int refcount; /* increment with spinlock, decrement without */
 88	unsigned long id;
 89	unsigned long time;
 90	unsigned long state;
 91	char *sidstr;
 92	struct rb_node rbnode;
 93	struct cifs_sid sid;
 94};
 95
 96#ifdef __KERNEL__
 97extern struct key_type cifs_idmap_key_type;
 98extern const struct cred *root_cred;
 99#endif /* KERNEL */
100
101extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
102
103#endif /* _CIFSACL_H */