1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #ifndef _SYS_FS_ZFS_ACL_H
26 #define _SYS_FS_ZFS_ACL_H
27
28 #ifdef _KERNEL
29 #include <sys/isa_defs.h>
30 #include <sys/types32.h>
31 #endif
32 #include <sys/acl.h>
33 #include <sys/dmu.h>
34 #include <sys/zfs_fuid.h>
35 #include <sys/sa.h>
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
41 struct znode_phys;
42
43 #define ACE_SLOT_CNT 6
44 #define ZFS_ACL_VERSION_INITIAL 0ULL
45 #define ZFS_ACL_VERSION_FUID 1ULL
46 #define ZFS_ACL_VERSION ZFS_ACL_VERSION_FUID
47
48 /*
49 * ZFS ACLs (Access Control Lists) are stored in various forms.
50 *
51 * Files created with ACL version ZFS_ACL_VERSION_INITIAL
52 * will all be created with fixed length ACEs of type
53 * zfs_oldace_t.
54 *
55 * Files with ACL version ZFS_ACL_VERSION_FUID will be created
56 * with various sized ACEs. The abstraction entries will utilize
57 * zfs_ace_hdr_t, normal user/group entries will use zfs_ace_t
58 * and some specialized CIFS ACEs will use zfs_object_ace_t.
59 */
60
61 /*
62 * All ACEs have a common hdr. For
63 * owner@, group@, and everyone@ this is all
64 * thats needed.
65 */
66 typedef struct zfs_ace_hdr {
67 uint16_t z_type;
68 uint16_t z_flags;
69 uint32_t z_access_mask;
70 } zfs_ace_hdr_t;
71
72 typedef zfs_ace_hdr_t zfs_ace_abstract_t;
73
74 /*
75 * Standard ACE
76 */
77 typedef struct zfs_ace {
78 zfs_ace_hdr_t z_hdr;
79 uint64_t z_fuid;
80 } zfs_ace_t;
81
82 /*
83 * The following type only applies to ACE_ACCESS_ALLOWED|DENIED_OBJECT_ACE_TYPE
84 * and will only be set/retrieved in a CIFS context.
85 */
86
87 typedef struct zfs_object_ace {
88 zfs_ace_t z_ace;
89 uint8_t z_object_type[16]; /* object type */
90 uint8_t z_inherit_type[16]; /* inherited object type */
91 } zfs_object_ace_t;
92
93 typedef struct zfs_oldace {
94 uint32_t z_fuid; /* "who" */
95 uint32_t z_access_mask; /* access mask */
96 uint16_t z_flags; /* flags, i.e inheritance */
97 uint16_t z_type; /* type of entry allow/deny */
98 } zfs_oldace_t;
99
100 typedef struct zfs_acl_phys_v0 {
101 uint64_t z_acl_extern_obj; /* ext acl pieces */
102 uint32_t z_acl_count; /* Number of ACEs */
103 uint16_t z_acl_version; /* acl version */
104 uint16_t z_acl_pad; /* pad */
105 zfs_oldace_t z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */
106 } zfs_acl_phys_v0_t;
107
108 #define ZFS_ACE_SPACE (sizeof (zfs_oldace_t) * ACE_SLOT_CNT)
109
110 /*
111 * Size of ACL count is always 2 bytes.
112 * Necessary to for dealing with both V0 ACL and V1 ACL layout
113 */
114 #define ZFS_ACL_COUNT_SIZE (sizeof (uint16_t))
115
116 typedef struct zfs_acl_phys {
117 uint64_t z_acl_extern_obj; /* ext acl pieces */
118 uint32_t z_acl_size; /* Number of bytes in ACL */
119 uint16_t z_acl_version; /* acl version */
120 uint16_t z_acl_count; /* ace count */
121 uint8_t z_ace_data[ZFS_ACE_SPACE]; /* space for embedded ACEs */
122 } zfs_acl_phys_t;
123
124 typedef struct acl_ops {
125 uint32_t (*ace_mask_get) (void *acep); /* get access mask */
126 void (*ace_mask_set) (void *acep,
127 uint32_t mask); /* set access mask */
128 uint16_t (*ace_flags_get) (void *acep); /* get flags */
129 void (*ace_flags_set) (void *acep,
130 uint16_t flags); /* set flags */
131 uint16_t (*ace_type_get)(void *acep); /* get type */
132 void (*ace_type_set)(void *acep,
133 uint16_t type); /* set type */
134 uint64_t (*ace_who_get)(void *acep); /* get who/fuid */
135 void (*ace_who_set)(void *acep,
136 uint64_t who); /* set who/fuid */
137 size_t (*ace_size)(void *acep); /* how big is this ace */
138 size_t (*ace_abstract_size)(void); /* sizeof abstract entry */
139 int (*ace_mask_off)(void); /* off of access mask in ace */
140 /* ptr to data if any */
141 int (*ace_data)(void *acep, void **datap);
142 } acl_ops_t;
143
144 /*
145 * A zfs_acl_t structure is composed of a list of zfs_acl_node_t's.
146 * Each node will have one or more ACEs associated with it. You will
147 * only have multiple nodes during a chmod operation. Normally only
148 * one node is required.
149 */
150 typedef struct zfs_acl_node {
151 list_node_t z_next; /* Next chunk of ACEs */
152 void *z_acldata; /* pointer into actual ACE(s) */
153 void *z_allocdata; /* pointer to kmem allocated memory */
154 size_t z_allocsize; /* Size of blob in bytes */
155 size_t z_size; /* length of ACL data */
156 uint64_t z_ace_count; /* number of ACEs in this acl node */
157 int z_ace_idx; /* ace iterator positioned on */
158 } zfs_acl_node_t;
159
160 typedef struct zfs_acl {
161 uint64_t z_acl_count; /* Number of ACEs */
162 size_t z_acl_bytes; /* Number of bytes in ACL */
163 uint_t z_version; /* version of ACL */
164 void *z_next_ace; /* pointer to next ACE */
165 uint64_t z_hints; /* ACL hints (ZFS_INHERIT_ACE ...) */
166 zfs_acl_node_t *z_curr_node; /* current node iterator is handling */
167 list_t z_acl; /* chunks of ACE data */
168 acl_ops_t z_ops; /* ACL operations */
169 } zfs_acl_t;
170
171 typedef struct acl_locator_cb {
172 zfs_acl_t *cb_aclp;
173 zfs_acl_node_t *cb_acl_node;
174 } zfs_acl_locator_cb_t;
175
176 #define ACL_DATA_ALLOCED 0x1
177 #define ZFS_ACL_SIZE(aclcnt) (sizeof (ace_t) * (aclcnt))
178
179 struct zfs_fuid_info;
180
181 typedef struct zfs_acl_ids {
182 uint64_t z_fuid; /* file owner fuid */
183 uint64_t z_fgid; /* file group owner fuid */
184 uint64_t z_mode; /* mode to set on create */
185 zfs_acl_t *z_aclp; /* ACL to create with file */
186 struct zfs_fuid_info *z_fuidp; /* for tracking fuids for log */
187 } zfs_acl_ids_t;
188
189 /*
190 * Property values for acl_mode and acl_inherit.
191 *
192 * acl_mode can take discard, noallow, groupmask and passthrough.
193 * whereas acl_inherit has secure instead of groupmask.
194 */
195
196 #define ZFS_ACL_DISCARD 0
197 #define ZFS_ACL_NOALLOW 1
198 #define ZFS_ACL_GROUPMASK 2
199 #define ZFS_ACL_PASSTHROUGH 3
200 #define ZFS_ACL_RESTRICTED 4
201 #define ZFS_ACL_PASSTHROUGH_X 5
202
203 struct znode;
204 struct zfsvfs;
205
206 #ifdef _KERNEL
207 int zfs_acl_ids_create(struct znode *, int, vattr_t *,
208 cred_t *, vsecattr_t *, zfs_acl_ids_t *);
209 void zfs_acl_ids_free(zfs_acl_ids_t *);
210 boolean_t zfs_acl_ids_overquota(struct zfsvfs *, zfs_acl_ids_t *);
211 int zfs_getacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
212 int zfs_setacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
213 void zfs_acl_rele(void *);
214 void zfs_oldace_byteswap(ace_t *, int);
215 void zfs_ace_byteswap(void *, size_t, boolean_t);
216 extern boolean_t zfs_has_access(struct znode *zp, cred_t *cr);
217 extern int zfs_zaccess(struct znode *, int, int, boolean_t, cred_t *);
218 int zfs_fastaccesschk_execute(struct znode *, cred_t *);
219 extern int zfs_zaccess_rwx(struct znode *, mode_t, int, cred_t *);
220 extern int zfs_zaccess_unix(struct znode *, mode_t, cred_t *);
221 extern int zfs_acl_access(struct znode *, int, cred_t *);
222 int zfs_acl_chmod_setattr(struct znode *, zfs_acl_t **, uint64_t);
223 int zfs_zaccess_delete(struct znode *, struct znode *, cred_t *);
224 int zfs_zaccess_rename(struct znode *, struct znode *,
225 struct znode *, struct znode *, cred_t *cr);
226 void zfs_acl_free(zfs_acl_t *);
227 int zfs_vsec_2_aclp(struct zfsvfs *, vtype_t, vsecattr_t *, cred_t *,
228 struct zfs_fuid_info **, zfs_acl_t **);
229 int zfs_aclset_common(struct znode *, zfs_acl_t *, cred_t *, dmu_tx_t *);
230 uint64_t zfs_external_acl(struct znode *);
231 int zfs_znode_acl_version(struct znode *);
232 int zfs_acl_size(struct znode *, int *);
233 zfs_acl_t *zfs_acl_alloc(int);
234 zfs_acl_node_t *zfs_acl_node_alloc(size_t);
235 void zfs_acl_xform(struct znode *, zfs_acl_t *, cred_t *);
236 void zfs_acl_data_locator(void **, uint32_t *, uint32_t, boolean_t, void *);
237 uint64_t zfs_mode_compute(uint64_t, zfs_acl_t *,
238 uint64_t *, uint64_t, uint64_t);
239 int zfs_acl_chown_setattr(struct znode *);
240
241 #endif
242
243 #ifdef __cplusplus
244 }
245 #endif
246 #endif /* _SYS_FS_ZFS_ACL_H */