fs/xfs/xfs_mac.h

   1 /*
   2  * Copyright (c) 2001-2002,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_MAC_H__
  19 #define __XFS_MAC_H__
  20
  21 /*
  22  * Mandatory Access Control
  23  *
  24  * Layout of a composite MAC label:
  25  * ml_list contains the list of categories (MSEN) followed by the list of
  26  * divisions (MINT). This is actually a header for the data structure which
  27  * will have an ml_list with more than one element.
  28  *
  29  *      -------------------------------
  30  *      | ml_msen_type | ml_mint_type |
  31  *      -------------------------------
  32  *      | ml_level     | ml_grade     |
  33  *      -------------------------------
  34  *      | ml_catcount                 |
  35  *      -------------------------------
  36  *      | ml_divcount                 |
  37  *      -------------------------------
  38  *      | category 1                  |
  39  *      | . . .                       |
  40  *      | category N                  | (where N = ml_catcount)
  41  *      -------------------------------
  42  *      | division 1                  |
  43  *      | . . .                       |
  44  *      | division M                  | (where M = ml_divcount)
  45  *      -------------------------------
  46  */
  47 #define XFS_MAC_MAX_SETS        250
  48 typedef struct xfs_mac_label {
  49         __uint8_t       ml_msen_type;   /* MSEN label type */
  50         __uint8_t       ml_mint_type;   /* MINT label type */
  51         __uint8_t       ml_level;       /* Hierarchical level */
  52         __uint8_t       ml_grade;       /* Hierarchical grade */
  53         __uint16_t      ml_catcount;    /* Category count */
  54         __uint16_t      ml_divcount;    /* Division count */
  55                                         /* Category set, then Division set */
  56         __uint16_t      ml_list[XFS_MAC_MAX_SETS];
  57 } xfs_mac_label_t;
  58
  59 /* MSEN label type names. Choose an upper case ASCII character.  */
  60 #define XFS_MSEN_ADMIN_LABEL    'A'     /* Admin: low<admin != tcsec<high */
  61 #define XFS_MSEN_EQUAL_LABEL    'E'     /* Wildcard - always equal */
  62 #define XFS_MSEN_HIGH_LABEL     'H'     /* System High - always dominates */
  63 #define XFS_MSEN_MLD_HIGH_LABEL 'I'     /* System High, multi-level dir */
  64 #define XFS_MSEN_LOW_LABEL      'L'     /* System Low - always dominated */
  65 #define XFS_MSEN_MLD_LABEL      'M'     /* TCSEC label on a multi-level dir */
  66 #define XFS_MSEN_MLD_LOW_LABEL  'N'     /* System Low, multi-level dir */
  67 #define XFS_MSEN_TCSEC_LABEL    'T'     /* TCSEC label */
  68 #define XFS_MSEN_UNKNOWN_LABEL  'U'     /* unknown label */
  69
  70 /* MINT label type names. Choose a lower case ASCII character.  */
  71 #define XFS_MINT_BIBA_LABEL     'b'     /* Dual of a TCSEC label */
  72 #define XFS_MINT_EQUAL_LABEL    'e'     /* Wildcard - always equal */
  73 #define XFS_MINT_HIGH_LABEL     'h'     /* High Grade - always dominates */
  74 #define XFS_MINT_LOW_LABEL      'l'     /* Low Grade - always dominated */
  75
  76 /* On-disk XFS extended attribute names */
  77 #define SGI_MAC_FILE    "SGI_MAC_FILE"
  78 #define SGI_MAC_FILE_SIZE       (sizeof(SGI_MAC_FILE)-1)
  79
  80
  81 #ifdef __KERNEL__
  82
  83 #ifdef CONFIG_FS_POSIX_MAC
  84
  85 /* NOT YET IMPLEMENTED */
  86
  87 #define MACEXEC         00100
  88 #define MACWRITE        00200
  89 #define MACREAD         00400
  90
  91 struct xfs_inode;
  92 extern int  xfs_mac_iaccess(struct xfs_inode *, mode_t, cred_t *);
  93
  94 #define _MAC_XFS_IACCESS(i,m,c) (xfs_mac_iaccess(i,m,c))
  95 #define _MAC_VACCESS(v,c,m)     (xfs_mac_vaccess(v,c,m))
  96 #define _MAC_EXISTS             xfs_mac_vhaslabel
  97
  98 #else
  99 #define _MAC_XFS_IACCESS(i,m,c) (0)
 100 #define _MAC_VACCESS(v,c,m)     (0)
 101 #define _MAC_EXISTS             (NULL)
 102 #endif
 103
 104 #endif  /* __KERNEL__ */
 105
 106 #endif  /* __XFS_MAC_H__ */