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/*-
* Copyright (c) 1999 Robert N. M. Watson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Userland/kernel interface for Access Control Lists
*
* This code from the FreeBSD POSIX.1e implementation. Not all of the ACL
* code is committed yet; in order to use the library routines listed
* below, you'll need to download libposix1e_acl from the POSIX.1e
* implementation page, or possibly update to a more recent version of
* FreeBSD, as the code may have been committed.
*
* The POSIX.1e implementation page may be reached at:
* http://www.watson.org/fbsd-hardening/posix1e/
*
* However, all syscalls will pass through to appropriate VFS vnops, so
* file systems implementing the vnops are accessible through the syscalls.
*/
#ifndef _SYS_ACL_H
#define _SYS_ACL_H
/*
* POSIX.1e ACL types
*/
#define MAX_ACL_ENTRIES 32 /* maximum entries in an ACL */
#define _POSIX_ACL_PATH_MAX MAX_ACL_ENTRIES
typedef int acl_type_t;
typedef int acl_tag_t;
typedef mode_t acl_perm_t;
struct acl_entry {
acl_tag_t ae_tag;
uid_t ae_id;
acl_perm_t ae_perm;
};
typedef struct acl_entry *acl_entry_t;
struct acl {
int acl_cnt;
struct acl_entry acl_entry[MAX_ACL_ENTRIES];
};
typedef struct acl *acl_t;
/*
* Possible valid values for a_type of acl_entry_t
*/
#define ACL_USER_OBJ 0x00000001
#define ACL_USER 0x00000002
#define ACL_GROUP_OBJ 0x00000004
#define ACL_GROUP 0x00000008
#define ACL_MASK 0x00000010
#define ACL_OTHER 0x00000020
#define ACL_OTHER_OBJ ACL_OTHER
#define ACL_AFS_ID 0x00000040
#define ACL_TYPE_ACCESS 0x00000000
#define ACL_TYPE_DEFAULT 0x00000001
/*
* Possible flags in a_perm field
*/
#define ACL_PERM_EXEC 0x0001
#define ACL_PERM_WRITE 0x0002
#define ACL_PERM_READ 0x0004
#define ACL_PERM_NONE 0x0000
#define ACL_PERM_BITS (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
#define ACL_POSIX1E_BITS (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
#ifdef KERNEL
/*
* Storage for ACLs and support structures
*/
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_ACL);
#endif
/*
* Dummy declarations so that we can expose acl_access all over the place
* without worrying about including ucred and friends. vnode.h does the
* same thing.
*/
struct ucred;
struct proc;
/*
* POSIX.1e and generic kernel/vfs semantics functions--not currently in the
* base distribution, but will be soon.
*/
struct vattr;
struct vop_getacl_args;
struct vop_aclcheck_args;
int posix1e_acl_access(struct acl *a_acl, int a_mode, struct ucred *a_cred,
struct proc *a_p);
void generic_attr_to_posix1e_acl(struct acl *a_acl, struct vattr *vattr);
int generic_vop_getacl(struct vop_getacl_args *ap);
int generic_vop_aclcheck(struct vop_aclcheck_args *ap);
int posix1e_vop_aclcheck(struct vop_aclcheck_args *ap);
#else /* KERNEL */
/*
* Syscall interface -- use the library calls instead as the syscalls
* have strict acl entry ordering requirements
*/
int acl_syscall_get_file(char *path, acl_type_t type, struct acl *aclp);
int acl_syscall_set_file(char *path, acl_type_t type, struct acl *aclp);
int acl_syscall_get_fd(int filedes, acl_type_t type, struct acl *aclp);
int acl_syscall_set_fd(int filedes, acl_type_t type, struct acl *aclp);
int acl_syscall_delete_file(const char *path_p, acl_type_t type);
int acl_syscall_delete_fd(int filedes, acl_type_t type);
int acl_syscall_aclcheck_file(char *path, acl_type_t type,
struct acl *aclp);
int acl_syscall_aclcheck_fd(int filedes, acl_type_t type,
struct acl *aclp);
/*
* Supported POSIX.1e ACL manipulation and assignment/retrieval API
* These are currently provided by libposix1e_acl, which is not shipped
* with the base distribution, but will be soon. Some of these are
* from POSIX.1e-extensions.
*
* Not all POSIX.1e ACL functions are listed here yet, but more will
* be soon.
*/
int acl_calc_mask(acl_t *acl_p);
int acl_delete_def_file(const char *path_p);
int acl_delete_def_fd(int filedes);
acl_t acl_from_text(const char *buf_p);
acl_t acl_get_fd(int fd, acl_type_t type);
acl_t acl_get_file(const char *path_p, acl_type_t type);
acl_t acl_init(int count);
int acl_set_fd(int fd, acl_t acl, acl_type_t type);
int acl_set_file(const char *path_p, acl_type_t type, acl_t acl);
char *acl_to_text(acl_t acl, ssize_t *len_p);
int acl_valid(acl_t acl);
int acl_valid_file(const char *path_p, acl_type_t type, acl_t acl);
int acl_valid_fd(int fd, acl_type_t type, acl_t acl);
int acl_free(void *obj_p);
#endif /* KERNEL */
#endif /* _SYS_ACL_H */
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