107 строки
3.8 KiB
C
107 строки
3.8 KiB
C
/*
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* Copyright (c) 2001-2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_MAC_H__
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#define __XFS_MAC_H__
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/*
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* Mandatory Access Control
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*
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* Layout of a composite MAC label:
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* ml_list contains the list of categories (MSEN) followed by the list of
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* divisions (MINT). This is actually a header for the data structure which
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* will have an ml_list with more than one element.
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*
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* -------------------------------
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* | ml_msen_type | ml_mint_type |
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* -------------------------------
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* | ml_level | ml_grade |
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* -------------------------------
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* | ml_catcount |
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* -------------------------------
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* | ml_divcount |
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* -------------------------------
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* | category 1 |
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* | . . . |
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* | category N | (where N = ml_catcount)
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* -------------------------------
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* | division 1 |
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* | . . . |
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* | division M | (where M = ml_divcount)
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* -------------------------------
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*/
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#define XFS_MAC_MAX_SETS 250
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typedef struct xfs_mac_label {
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__uint8_t ml_msen_type; /* MSEN label type */
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__uint8_t ml_mint_type; /* MINT label type */
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__uint8_t ml_level; /* Hierarchical level */
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__uint8_t ml_grade; /* Hierarchical grade */
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__uint16_t ml_catcount; /* Category count */
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__uint16_t ml_divcount; /* Division count */
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/* Category set, then Division set */
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__uint16_t ml_list[XFS_MAC_MAX_SETS];
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} xfs_mac_label_t;
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/* MSEN label type names. Choose an upper case ASCII character. */
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#define XFS_MSEN_ADMIN_LABEL 'A' /* Admin: low<admin != tcsec<high */
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#define XFS_MSEN_EQUAL_LABEL 'E' /* Wildcard - always equal */
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#define XFS_MSEN_HIGH_LABEL 'H' /* System High - always dominates */
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#define XFS_MSEN_MLD_HIGH_LABEL 'I' /* System High, multi-level dir */
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#define XFS_MSEN_LOW_LABEL 'L' /* System Low - always dominated */
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#define XFS_MSEN_MLD_LABEL 'M' /* TCSEC label on a multi-level dir */
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#define XFS_MSEN_MLD_LOW_LABEL 'N' /* System Low, multi-level dir */
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#define XFS_MSEN_TCSEC_LABEL 'T' /* TCSEC label */
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#define XFS_MSEN_UNKNOWN_LABEL 'U' /* unknown label */
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/* MINT label type names. Choose a lower case ASCII character. */
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#define XFS_MINT_BIBA_LABEL 'b' /* Dual of a TCSEC label */
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#define XFS_MINT_EQUAL_LABEL 'e' /* Wildcard - always equal */
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#define XFS_MINT_HIGH_LABEL 'h' /* High Grade - always dominates */
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#define XFS_MINT_LOW_LABEL 'l' /* Low Grade - always dominated */
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/* On-disk XFS extended attribute names */
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#define SGI_MAC_FILE "SGI_MAC_FILE"
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#define SGI_MAC_FILE_SIZE (sizeof(SGI_MAC_FILE)-1)
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#ifdef __KERNEL__
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#ifdef CONFIG_FS_POSIX_MAC
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/* NOT YET IMPLEMENTED */
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#define MACEXEC 00100
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#define MACWRITE 00200
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#define MACREAD 00400
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struct xfs_inode;
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extern int xfs_mac_iaccess(struct xfs_inode *, mode_t, cred_t *);
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#define _MAC_XFS_IACCESS(i,m,c) (xfs_mac_iaccess(i,m,c))
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#define _MAC_VACCESS(v,c,m) (xfs_mac_vaccess(v,c,m))
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#define _MAC_EXISTS xfs_mac_vhaslabel
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#else
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#define _MAC_XFS_IACCESS(i,m,c) (0)
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#define _MAC_VACCESS(v,c,m) (0)
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#define _MAC_EXISTS (NULL)
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#endif
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#endif /* __KERNEL__ */
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#endif /* __XFS_MAC_H__ */
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