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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#ifndef __XFS_CRED_H__
#define __XFS_CRED_H__
/*
* Access Control Lists
*/
typedef ushort xfs_acl_perm_t;
typedef int xfs_acl_type_t;
typedef int xfs_acl_tag_t;
typedef int xfs_acl_id_t;
#define XFS_ACL_MAX_ENTRIES 25
#define XFS_ACL_NOT_PRESENT (-1)
typedef struct xfs_acl_entry {
xfs_acl_tag_t ae_tag;
xfs_acl_id_t ae_id;
xfs_acl_perm_t ae_perm;
} xfs_acl_entry_t;
typedef struct xfs_acl {
int acl_cnt;
xfs_acl_entry_t acl_entry[XFS_ACL_MAX_ENTRIES];
} xfs_acl_t;
/*
* Capabilities
*/
typedef __uint64_t xfs_cap_value_t;
typedef struct xfs_cap_set {
xfs_cap_value_t cap_effective; /* use in capability checks */
xfs_cap_value_t cap_permitted; /* combined with file attrs */
xfs_cap_value_t cap_inheritable;/* pass through exec */
} xfs_cap_set_t;
/*
* Mandatory Access Control
*
* Layout of a composite MAC label:
* ml_list contains the list of categories (MSEN) followed by the list of
* divisions (MINT). This is actually a header for the data structure which
* will have an ml_list with more than one element.
*
* -------------------------------
* | ml_msen_type | ml_mint_type |
* -------------------------------
* | ml_level | ml_grade |
* -------------------------------
* | ml_catcount |
* -------------------------------
* | ml_divcount |
* -------------------------------
* | category 1 |
* | . . . |
* | category N | (where N = ml_catcount)
* -------------------------------
* | division 1 |
* | . . . |
* | division M | (where M = ml_divcount)
* -------------------------------
*/
#define XFS_MAC_MAX_SETS 250
typedef struct xfs_mac_label {
unsigned char ml_msen_type; /* MSEN label type */
unsigned char ml_mint_type; /* MINT label type */
unsigned char ml_level; /* Hierarchical level */
unsigned char ml_grade; /* Hierarchical grade */
unsigned short ml_catcount; /* Category count */
unsigned short ml_divcount; /* Division count */
/* Category set, then Division set */
unsigned short ml_list[XFS_MAC_MAX_SETS];
} xfs_mac_label_t;
/* On-disk XFS extended attribute names (access control lists) */
#define SGI_ACL_FILE "SGI_ACL_FILE"
#define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT"
#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
/* On-disk XFS extended attribute names (mandatory access control) */
#define SGI_MAC_FILE "SGI_MAC_FILE"
#define SGI_MAC_FILE_SIZE (sizeof(SGI_MAC_FILE)-1)
/* On-disk XFS extended attribute names (capabilities) */
#define SGI_CAP_FILE "SGI_CAP_FILE"
#define SGI_CAP_FILE_SIZE (sizeof(SGI_CAP_FILE)-1)
/* MSEN label type names. Choose an upper case ASCII character. */
#define MSEN_ADMIN_LABEL 'A' /* Admin: low<admin != tcsec<high */
#define MSEN_EQUAL_LABEL 'E' /* Wildcard - always equal */
#define MSEN_HIGH_LABEL 'H' /* System High - always dominates */
#define MSEN_MLD_HIGH_LABEL 'I' /* System High, multi-level dir */
#define MSEN_LOW_LABEL 'L' /* System Low - always dominated */
#define MSEN_MLD_LABEL 'M' /* TCSEC label on a multi-level dir */
#define MSEN_MLD_LOW_LABEL 'N' /* System Low, multi-level dir */
#define MSEN_TCSEC_LABEL 'T' /* TCSEC label */
#define MSEN_UNKNOWN_LABEL 'U' /* unknown label */
/* MINT label type names. Choose a lower case ASCII character. */
#define MINT_BIBA_LABEL 'b' /* Dual of a TCSEC label */
#define MINT_EQUAL_LABEL 'e' /* Wildcard - always equal */
#define MINT_HIGH_LABEL 'h' /* High Grade - always dominates */
#define MINT_LOW_LABEL 'l' /* Low Grade - always dominated */
#ifdef __KERNEL__
#include <asm/param.h> /* For NGROUPS */
#include <linux/capability.h>
#include <linux/sched.h>
/*
* Credentials
*/
typedef struct cred {
int cr_ref; /* reference count */
ushort cr_ngroups; /* number of groups in cr_groups */
uid_t cr_uid; /* effective user id */
gid_t cr_gid; /* effective group id */
uid_t cr_ruid; /* real user id */
gid_t cr_rgid; /* real group id */
uid_t cr_suid; /* "saved" user id (from exec) */
gid_t cr_sgid; /* "saved" group id (from exec) */
xfs_mac_label_t *cr_mac; /* MAC label for B1 and beyond */
xfs_cap_set_t cr_cap; /* capability (privilege) sets */
gid_t cr_groups[NGROUPS]; /* supplementary group list */
} cred_t;
#define VREAD 00400
#define VWRITE 00200
#define VEXEC 00100
#define MACEXEC 00100
#define MACWRITE 00200
#define MACREAD 00400
extern void cred_init(void);
static __inline cred_t *get_current_cred(void) { return NULL; }
/*
* XXX: tes
* This is a hack.
* It assumes that if cred is not null then it is sys_cred which
* has all capabilities.
* One solution may be to implement capable_cred based on linux' capable()
* and initialize all credentials in our xfs linvfs layer.
*/
static __inline int capable_cred(cred_t *cr, int cid) { return (cr==NULL) ? capable(cid) : 1; }
extern struct cred *sys_cred;
#endif /* __KERNEL__ */
#endif /* __XFS_CRED_H__ */
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