cifsacl.h

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/*
 *   fs/cifs/cifsacl.h
 *
 *   Copyright (c) International Business Machines  Corp., 2007
 *   Author(s): Steve French ([email protected])
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef _CIFSACL_H
#define _CIFSACL_H


#define NUM_AUTHS 6 /* number of authority fields */
#define NUM_SUBAUTHS 5 /* number of sub authority fields */
#define NUM_WK_SIDS 7 /* number of well known sids */
#define SIDNAMELENGTH 20 /* long enough for the ones we care about */
#define DEFSECDESCLEN 192 /* sec desc len contaiting a dacl with three aces */

#define READ_BIT        0x4
#define WRITE_BIT       0x2
#define EXEC_BIT        0x1

#define UBITSHIFT   6
#define GBITSHIFT   3

#define ACCESS_ALLOWED  0
#define ACCESS_DENIED   1

#define SIDOWNER 1
#define SIDGROUP 2
#define SIDLEN 150 /* S- 1 revision- 6 authorities- max 5 sub authorities */

#define SID_ID_MAPPED 0
#define SID_ID_PENDING 1
#define SID_MAP_EXPIRE (3600 * HZ) /* map entry expires after one hour */
#define SID_MAP_RETRY (300 * HZ)   /* wait 5 minutes for next attempt to map */

struct cifs_ntsd {
    __le16 revision; /* revision level */
    __le16 type;
    __le32 osidoffset;
    __le32 gsidoffset;
    __le32 sacloffset;
    __le32 dacloffset;
} __attribute__((packed));

struct cifs_sid {
    __u8 revision; /* revision level */
    __u8 num_subauth;
    __u8 authority[6];
    __le32 sub_auth[5]; /* sub_auth[num_subauth] */
} __attribute__((packed));

struct cifs_acl {
    __le16 revision; /* revision level */
    __le16 size;
    __le32 num_aces;
} __attribute__((packed));

struct cifs_ace {
    __u8 type;
    __u8 flags;
    __le16 size;
    __le32 access_req;
    struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
} __attribute__((packed));

struct cifs_wksid {
    struct cifs_sid cifssid;
    char sidname[SIDNAMELENGTH];
} __attribute__((packed));

struct cifs_sid_id {
    unsigned int refcount; /* increment with spinlock, decrement without */
    unsigned long id;
    unsigned long time;
    unsigned long state;
    char *sidstr;
    struct rb_node rbnode;
    struct cifs_sid sid;
};

#ifdef __KERNEL__
extern struct key_type cifs_idmap_key_type;
extern const struct cred *root_cred;
#endif /* KERNEL */

extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);

#endif /* _CIFSACL_H */