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 #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
  51 struct 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
  60 struct 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
  67 struct cifs_acl {
  68         __le16 revision; /* revision level */
  69         __le16 size;
  70         __le32 num_aces;
  71 } __attribute__((packed));
  72
  73 struct 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
  81 struct cifs_wksid {
  82         struct cifs_sid cifssid;
  83         char sidname[SIDNAMELENGTH];
  84 } __attribute__((packed));
  85
  86 struct 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__
  97 extern struct key_type cifs_idmap_key_type;
  98 extern const struct cred *root_cred;
  99 #endif /* KERNEL */
 100
 101 extern int match_sid(struct cifs_sid *);
 102 extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
 103
 104 #endif /* _CIFSACL_H */