/*
   Copyright (c) 2011-2012 Red Hat, Inc. <http://www.redhat.com>
   This file is part of GlusterFS.

   This file is licensed to you under your choice of the GNU Lesser
   General Public License, version 3 or any later version (LGPLv3 or
   later), or the GNU General Public License, version 2 (GPLv2), in all
   cases as published by the Free Software Foundation.
*/

#ifndef _POSIX_ACL_H
#define _POSIX_ACL_H

#include <stdint.h>

#include "xlator.h"
#include "common-utils.h"
#include "byte-order.h"

#define POSIX_ACL_MINIMAL_ACE_COUNT 3

#define POSIX_ACL_READ                (0x04)
#define POSIX_ACL_WRITE               (0x02)
#define POSIX_ACL_EXECUTE             (0x01)

#define POSIX_ACL_UNDEFINED_TAG       (0x00)
#define POSIX_ACL_USER_OBJ            (0x01)
#define POSIX_ACL_USER                (0x02)
#define POSIX_ACL_GROUP_OBJ           (0x04)
#define POSIX_ACL_GROUP               (0x08)
#define POSIX_ACL_MASK                (0x10)
#define POSIX_ACL_OTHER               (0x20)

#define POSIX_ACL_UNDEFINED_ID        ((id_t)-1)


struct posix_ace {
        uint16_t     tag;
        uint16_t     perm;
        uint32_t     id;
};


struct posix_acl {
        int               refcnt;
        int               count;
        struct posix_ace  entries[];
};


struct posix_acl_ctx {
        uid_t             uid;
        gid_t             gid;
        mode_t            perm;
        struct posix_acl *acl_access;
        struct posix_acl *acl_default;
};


struct posix_acl_conf {
        gf_lock_t         acl_lock;
        uid_t             super_uid;
        struct posix_acl *minimal_acl;
};


struct posix_acl *posix_acl_new (xlator_t *this, int entry_count);
struct posix_acl *posix_acl_ref (xlator_t *this, struct posix_acl *acl);
void posix_acl_unref (xlator_t *this, struct posix_acl *acl);
void posix_acl_destroy (xlator_t *this, struct posix_acl *acl);
struct posix_acl_ctx *posix_acl_ctx_get (inode_t *inode, xlator_t *this);
int posix_acl_get (inode_t *inode, xlator_t *this,
                   struct posix_acl **acl_access_p,
                   struct posix_acl **acl_default_p);
int posix_acl_set (inode_t *inode, xlator_t *this, struct posix_acl *acl_access,
                   struct posix_acl *acl_default);

#endif /* !_POSIX_ACL_H */