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 #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 struct cifs_ntsd {
  43         __le16 revision; /* revision level */
  44         __le16 type;
  45         __le32 osidoffset;
  46         __le32 gsidoffset;
  47         __le32 sacloffset;
  48         __le32 dacloffset;
  49 } __attribute__((packed));
  50
  51 struct cifs_sid {
  52         __u8 revision; /* revision level */
  53         __u8 num_subauth;
  54         __u8 authority[6];
  55         __le32 sub_auth[5]; /* sub_auth[num_subauth] */
  56 } __attribute__((packed));
  57
  58 struct cifs_acl {
  59         __le16 revision; /* revision level */
  60         __le16 size;
  61         __le32 num_aces;
  62 } __attribute__((packed));
  63
  64 struct cifs_ace {
  65         __u8 type;
  66         __u8 flags;
  67         __le16 size;
  68         __le32 access_req;
  69         struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
  70 } __attribute__((packed));
  71
  72 struct cifs_wksid {
  73         struct cifs_sid cifssid;
  74         char sidname[SIDNAMELENGTH];
  75 } __attribute__((packed));
  76
  77 extern int match_sid(struct cifs_sid *);
  78 extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
  79
  80 #endif /* _CIFSACL_H */