fs/cifs/cifsacl.h

   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
  31 #define READ_BIT        0x4
  32 #define WRITE_BIT       0x2
  33 #define EXEC_BIT        0x1
  34
  35 #define UBITSHIFT       6
  36 #define GBITSHIFT       3
  37
  38 #define ACCESS_ALLOWED  0
  39 #define ACCESS_DENIED   1
  40
  41 struct cifs_ntsd {
  42         __le16 revision; /* revision level */
  43         __le16 type;
  44         __le32 osidoffset;
  45         __le32 gsidoffset;
  46         __le32 sacloffset;
  47         __le32 dacloffset;
  48 } __attribute__((packed));
  49
  50 struct cifs_sid {
  51         __u8 revision; /* revision level */
  52         __u8 num_subauth;
  53         __u8 authority[6];
  54         __le32 sub_auth[5]; /* sub_auth[num_subauth] */
  55 } __attribute__((packed));
  56
  57 struct cifs_acl {
  58         __le16 revision; /* revision level */
  59         __le16 size;
  60         __le32 num_aces;
  61 } __attribute__((packed));
  62
  63 struct cifs_ace {
  64         __u8 type;
  65         __u8 flags;
  66         __le16 size;
  67         __le32 access_req;
  68         struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
  69 } __attribute__((packed));
  70
  71 struct cifs_wksid {
  72         struct cifs_sid cifssid;
  73         char sidname[SIDNAMELENGTH];
  74 } __attribute__((packed));
  75
  76 #ifdef CONFIG_CIFS_EXPERIMENTAL
  77
  78 extern int match_sid(struct cifs_sid *);
  79 extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
  80
  81 #endif /*  CONFIG_CIFS_EXPERIMENTAL */
  82
  83 #endif /* _CIFSACL_H */