249 lines
8.1 KiB
C
249 lines
8.1 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#ifndef _SYS_FS_ZFS_ACL_H
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#define _SYS_FS_ZFS_ACL_H
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#ifdef _KERNEL
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#include <sys/isa_defs.h>
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#include <sys/types32.h>
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#include <sys/xvattr.h>
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#endif
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#include <sys/acl.h>
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#include <sys/dmu.h>
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#include <sys/zfs_fuid.h>
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#include <sys/sa.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct znode_phys;
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#define ACE_SLOT_CNT 6
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#define ZFS_ACL_VERSION_INITIAL 0ULL
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#define ZFS_ACL_VERSION_FUID 1ULL
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#define ZFS_ACL_VERSION ZFS_ACL_VERSION_FUID
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/*
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* ZFS ACLs (Access Control Lists) are stored in various forms.
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*
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* Files created with ACL version ZFS_ACL_VERSION_INITIAL
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* will all be created with fixed length ACEs of type
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* zfs_oldace_t.
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*
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* Files with ACL version ZFS_ACL_VERSION_FUID will be created
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* with various sized ACEs. The abstraction entries will utilize
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* zfs_ace_hdr_t, normal user/group entries will use zfs_ace_t
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* and some specialized CIFS ACEs will use zfs_object_ace_t.
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*/
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/*
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* All ACEs have a common hdr. For
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* owner@, group@, and everyone@ this is all
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* that's needed.
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*/
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typedef struct zfs_ace_hdr {
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uint16_t z_type;
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uint16_t z_flags;
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uint32_t z_access_mask;
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} zfs_ace_hdr_t;
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typedef zfs_ace_hdr_t zfs_ace_abstract_t;
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/*
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* Standard ACE
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*/
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typedef struct zfs_ace {
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zfs_ace_hdr_t z_hdr;
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uint64_t z_fuid;
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} zfs_ace_t;
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/*
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* The following type only applies to ACE_ACCESS_ALLOWED|DENIED_OBJECT_ACE_TYPE
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* and will only be set/retrieved in a CIFS context.
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*/
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typedef struct zfs_object_ace {
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zfs_ace_t z_ace;
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uint8_t z_object_type[16]; /* object type */
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uint8_t z_inherit_type[16]; /* inherited object type */
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} zfs_object_ace_t;
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typedef struct zfs_oldace {
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uint32_t z_fuid; /* "who" */
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uint32_t z_access_mask; /* access mask */
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uint16_t z_flags; /* flags, i.e inheritance */
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uint16_t z_type; /* type of entry allow/deny */
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} zfs_oldace_t;
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typedef struct zfs_acl_phys_v0 {
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uint64_t z_acl_extern_obj; /* ext acl pieces */
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uint32_t z_acl_count; /* Number of ACEs */
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uint16_t z_acl_version; /* acl version */
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uint16_t z_acl_pad; /* pad */
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zfs_oldace_t z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */
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} zfs_acl_phys_v0_t;
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#define ZFS_ACE_SPACE (sizeof (zfs_oldace_t) * ACE_SLOT_CNT)
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/*
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* Size of ACL count is always 2 bytes.
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* Necessary to for dealing with both V0 ACL and V1 ACL layout
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*/
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#define ZFS_ACL_COUNT_SIZE (sizeof (uint16_t))
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typedef struct zfs_acl_phys {
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uint64_t z_acl_extern_obj; /* ext acl pieces */
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uint32_t z_acl_size; /* Number of bytes in ACL */
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uint16_t z_acl_version; /* acl version */
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uint16_t z_acl_count; /* ace count */
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uint8_t z_ace_data[ZFS_ACE_SPACE]; /* space for embedded ACEs */
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} zfs_acl_phys_t;
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typedef struct acl_ops {
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uint32_t (*ace_mask_get) (void *acep); /* get access mask */
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void (*ace_mask_set) (void *acep,
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uint32_t mask); /* set access mask */
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uint16_t (*ace_flags_get) (void *acep); /* get flags */
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void (*ace_flags_set) (void *acep,
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uint16_t flags); /* set flags */
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uint16_t (*ace_type_get)(void *acep); /* get type */
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void (*ace_type_set)(void *acep,
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uint16_t type); /* set type */
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uint64_t (*ace_who_get)(void *acep); /* get who/fuid */
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void (*ace_who_set)(void *acep,
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uint64_t who); /* set who/fuid */
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size_t (*ace_size)(void *acep); /* how big is this ace */
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size_t (*ace_abstract_size)(void); /* sizeof abstract entry */
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int (*ace_mask_off)(void); /* off of access mask in ace */
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/* ptr to data if any */
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int (*ace_data)(void *acep, void **datap);
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} acl_ops_t;
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/*
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* A zfs_acl_t structure is composed of a list of zfs_acl_node_t's.
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* Each node will have one or more ACEs associated with it. You will
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* only have multiple nodes during a chmod operation. Normally only
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* one node is required.
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*/
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typedef struct zfs_acl_node {
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list_node_t z_next; /* Next chunk of ACEs */
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void *z_acldata; /* pointer into actual ACE(s) */
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void *z_allocdata; /* pointer to kmem allocated memory */
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size_t z_allocsize; /* Size of blob in bytes */
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size_t z_size; /* length of ACL data */
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uint64_t z_ace_count; /* number of ACEs in this acl node */
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int z_ace_idx; /* ace iterator positioned on */
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} zfs_acl_node_t;
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typedef struct zfs_acl {
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uint64_t z_acl_count; /* Number of ACEs */
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size_t z_acl_bytes; /* Number of bytes in ACL */
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uint_t z_version; /* version of ACL */
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void *z_next_ace; /* pointer to next ACE */
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uint64_t z_hints; /* ACL hints (ZFS_INHERIT_ACE ...) */
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zfs_acl_node_t *z_curr_node; /* current node iterator is handling */
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list_t z_acl; /* chunks of ACE data */
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acl_ops_t *z_ops; /* ACL operations */
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} zfs_acl_t;
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typedef struct acl_locator_cb {
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zfs_acl_t *cb_aclp;
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zfs_acl_node_t *cb_acl_node;
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} zfs_acl_locator_cb_t;
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#define ACL_DATA_ALLOCED 0x1
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#define ZFS_ACL_SIZE(aclcnt) (sizeof (ace_t) * (aclcnt))
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struct zfs_fuid_info;
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typedef struct zfs_acl_ids {
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uint64_t z_fuid; /* file owner fuid */
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uint64_t z_fgid; /* file group owner fuid */
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uint64_t z_mode; /* mode to set on create */
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zfs_acl_t *z_aclp; /* ACL to create with file */
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struct zfs_fuid_info *z_fuidp; /* for tracking fuids for log */
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} zfs_acl_ids_t;
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/*
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* Property values for acl_mode and acl_inherit.
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*
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* acl_mode can take discard, noallow, groupmask and passthrough.
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* whereas acl_inherit has secure instead of groupmask.
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*/
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#define ZFS_ACL_DISCARD 0
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#define ZFS_ACL_NOALLOW 1
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#define ZFS_ACL_GROUPMASK 2
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#define ZFS_ACL_PASSTHROUGH 3
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#define ZFS_ACL_RESTRICTED 4
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#define ZFS_ACL_PASSTHROUGH_X 5
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struct znode;
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struct zfsvfs;
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#ifdef _KERNEL
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int zfs_acl_ids_create(struct znode *, int, vattr_t *,
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cred_t *, vsecattr_t *, zfs_acl_ids_t *);
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void zfs_acl_ids_free(zfs_acl_ids_t *);
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boolean_t zfs_acl_ids_overquota(struct zfsvfs *, zfs_acl_ids_t *, uint64_t);
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int zfs_getacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
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int zfs_setacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
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void zfs_acl_rele(void *);
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void zfs_oldace_byteswap(ace_t *, int);
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void zfs_ace_byteswap(void *, size_t, boolean_t);
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extern boolean_t zfs_has_access(struct znode *zp, cred_t *cr);
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extern int zfs_zaccess(struct znode *, int, int, boolean_t, cred_t *);
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int zfs_fastaccesschk_execute(struct znode *, cred_t *);
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extern int zfs_zaccess_rwx(struct znode *, mode_t, int, cred_t *);
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extern int zfs_zaccess_unix(struct znode *, mode_t, cred_t *);
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extern int zfs_acl_access(struct znode *, int, cred_t *);
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int zfs_acl_chmod_setattr(struct znode *, zfs_acl_t **, uint64_t);
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int zfs_zaccess_delete(struct znode *, struct znode *, cred_t *);
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int zfs_zaccess_rename(struct znode *, struct znode *,
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struct znode *, struct znode *, cred_t *cr);
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void zfs_acl_free(zfs_acl_t *);
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int zfs_vsec_2_aclp(struct zfsvfs *, umode_t, vsecattr_t *, cred_t *,
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struct zfs_fuid_info **, zfs_acl_t **);
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int zfs_aclset_common(struct znode *, zfs_acl_t *, cred_t *, dmu_tx_t *);
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uint64_t zfs_external_acl(struct znode *);
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int zfs_znode_acl_version(struct znode *);
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int zfs_acl_size(struct znode *, int *);
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zfs_acl_t *zfs_acl_alloc(int);
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zfs_acl_node_t *zfs_acl_node_alloc(size_t);
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void zfs_acl_xform(struct znode *, zfs_acl_t *, cred_t *);
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void zfs_acl_data_locator(void **, uint32_t *, uint32_t, boolean_t, void *);
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uint64_t zfs_mode_compute(uint64_t, zfs_acl_t *,
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uint64_t *, uint64_t, uint64_t);
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int zfs_acl_node_read(struct znode *, boolean_t, zfs_acl_t **, boolean_t);
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int zfs_acl_chown_setattr(struct znode *);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_FS_ZFS_ACL_H */
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