1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #ifndef _SYS_FS_ZFS_ACL_H 27 #define _SYS_FS_ZFS_ACL_H 28 29 #ifdef _KERNEL 30 #include <sys/isa_defs.h> 31 #include <sys/types32.h> 32 #include <sys/xvattr.h> 33 #endif 34 #include <sys/acl.h> 35 #include <sys/dmu.h> 36 #include <sys/zfs_fuid.h> 37 #include <sys/sa.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 struct znode_phys; 44 45 #define ACE_SLOT_CNT 6 46 #define ZFS_ACL_VERSION_INITIAL 0ULL 47 #define ZFS_ACL_VERSION_FUID 1ULL 48 #define ZFS_ACL_VERSION ZFS_ACL_VERSION_FUID 49 50 /* 51 * ZFS ACLs (Access Control Lists) are stored in various forms. 52 * 53 * Files created with ACL version ZFS_ACL_VERSION_INITIAL 54 * will all be created with fixed length ACEs of type 55 * zfs_oldace_t. 56 * 57 * Files with ACL version ZFS_ACL_VERSION_FUID will be created 58 * with various sized ACEs. The abstraction entries will utilize 59 * zfs_ace_hdr_t, normal user/group entries will use zfs_ace_t 60 * and some specialized CIFS ACEs will use zfs_object_ace_t. 61 */ 62 63 /* 64 * All ACEs have a common hdr. For 65 * owner@, group@, and everyone@ this is all 66 * that's needed. 67 */ 68 typedef struct zfs_ace_hdr { 69 uint16_t z_type; 70 uint16_t z_flags; 71 uint32_t z_access_mask; 72 } zfs_ace_hdr_t; 73 74 typedef zfs_ace_hdr_t zfs_ace_abstract_t; 75 76 /* 77 * Standard ACE 78 */ 79 typedef struct zfs_ace { 80 zfs_ace_hdr_t z_hdr; 81 uint64_t z_fuid; 82 } zfs_ace_t; 83 84 /* 85 * The following type only applies to ACE_ACCESS_ALLOWED|DENIED_OBJECT_ACE_TYPE 86 * and will only be set/retrieved in a CIFS context. 87 */ 88 89 typedef struct zfs_object_ace { 90 zfs_ace_t z_ace; 91 uint8_t z_object_type[16]; /* object type */ 92 uint8_t z_inherit_type[16]; /* inherited object type */ 93 } zfs_object_ace_t; 94 95 typedef struct zfs_oldace { 96 uint32_t z_fuid; /* "who" */ 97 uint32_t z_access_mask; /* access mask */ 98 uint16_t z_flags; /* flags, i.e inheritance */ 99 uint16_t z_type; /* type of entry allow/deny */ 100 } zfs_oldace_t; 101 102 typedef struct zfs_acl_phys_v0 { 103 uint64_t z_acl_extern_obj; /* ext acl pieces */ 104 uint32_t z_acl_count; /* Number of ACEs */ 105 uint16_t z_acl_version; /* acl version */ 106 uint16_t z_acl_pad; /* pad */ 107 zfs_oldace_t z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */ 108 } zfs_acl_phys_v0_t; 109 110 #define ZFS_ACE_SPACE (sizeof (zfs_oldace_t) * ACE_SLOT_CNT) 111 112 /* 113 * Size of ACL count is always 2 bytes. 114 * Necessary to for dealing with both V0 ACL and V1 ACL layout 115 */ 116 #define ZFS_ACL_COUNT_SIZE (sizeof (uint16_t)) 117 118 typedef struct zfs_acl_phys { 119 uint64_t z_acl_extern_obj; /* ext acl pieces */ 120 uint32_t z_acl_size; /* Number of bytes in ACL */ 121 uint16_t z_acl_version; /* acl version */ 122 uint16_t z_acl_count; /* ace count */ 123 uint8_t z_ace_data[ZFS_ACE_SPACE]; /* space for embedded ACEs */ 124 } zfs_acl_phys_t; 125 126 typedef struct acl_ops { 127 uint32_t (*ace_mask_get) (void *acep); /* get access mask */ 128 void (*ace_mask_set) (void *acep, 129 uint32_t mask); /* set access mask */ 130 uint16_t (*ace_flags_get) (void *acep); /* get flags */ 131 void (*ace_flags_set) (void *acep, 132 uint16_t flags); /* set flags */ 133 uint16_t (*ace_type_get)(void *acep); /* get type */ 134 void (*ace_type_set)(void *acep, 135 uint16_t type); /* set type */ 136 uint64_t (*ace_who_get)(void *acep); /* get who/fuid */ 137 void (*ace_who_set)(void *acep, 138 uint64_t who); /* set who/fuid */ 139 size_t (*ace_size)(void *acep); /* how big is this ace */ 140 size_t (*ace_abstract_size)(void); /* sizeof abstract entry */ 141 int (*ace_mask_off)(void); /* off of access mask in ace */ 142 /* ptr to data if any */ 143 int (*ace_data)(void *acep, void **datap); 144 } acl_ops_t; 145 146 /* 147 * A zfs_acl_t structure is composed of a list of zfs_acl_node_t's. 148 * Each node will have one or more ACEs associated with it. You will 149 * only have multiple nodes during a chmod operation. Normally only 150 * one node is required. 151 */ 152 typedef struct zfs_acl_node { 153 list_node_t z_next; /* Next chunk of ACEs */ 154 void *z_acldata; /* pointer into actual ACE(s) */ 155 void *z_allocdata; /* pointer to kmem allocated memory */ 156 size_t z_allocsize; /* Size of blob in bytes */ 157 size_t z_size; /* length of ACL data */ 158 uint64_t z_ace_count; /* number of ACEs in this acl node */ 159 int z_ace_idx; /* ace iterator positioned on */ 160 } zfs_acl_node_t; 161 162 typedef struct zfs_acl { 163 uint64_t z_acl_count; /* Number of ACEs */ 164 size_t z_acl_bytes; /* Number of bytes in ACL */ 165 uint_t z_version; /* version of ACL */ 166 void *z_next_ace; /* pointer to next ACE */ 167 uint64_t z_hints; /* ACL hints (ZFS_INHERIT_ACE ...) */ 168 zfs_acl_node_t *z_curr_node; /* current node iterator is handling */ 169 list_t z_acl; /* chunks of ACE data */ 170 const acl_ops_t *z_ops; /* ACL operations */ 171 } zfs_acl_t; 172 173 typedef struct acl_locator_cb { 174 zfs_acl_t *cb_aclp; 175 zfs_acl_node_t *cb_acl_node; 176 } zfs_acl_locator_cb_t; 177 178 #define ACL_DATA_ALLOCED 0x1 179 #define ZFS_ACL_SIZE(aclcnt) (sizeof (ace_t) * (aclcnt)) 180 181 struct zfs_fuid_info; 182 183 typedef struct zfs_acl_ids { 184 uint64_t z_fuid; /* file owner fuid */ 185 uint64_t z_fgid; /* file group owner fuid */ 186 uint64_t z_mode; /* mode to set on create */ 187 zfs_acl_t *z_aclp; /* ACL to create with file */ 188 struct zfs_fuid_info *z_fuidp; /* for tracking fuids for log */ 189 } zfs_acl_ids_t; 190 191 /* 192 * Property values for acl_mode and acl_inherit. 193 * 194 * acl_mode can take discard, noallow, groupmask and passthrough. 195 * whereas acl_inherit has secure instead of groupmask. 196 */ 197 198 #define ZFS_ACL_DISCARD 0 199 #define ZFS_ACL_NOALLOW 1 200 #define ZFS_ACL_GROUPMASK 2 201 #define ZFS_ACL_PASSTHROUGH 3 202 #define ZFS_ACL_RESTRICTED 4 203 #define ZFS_ACL_PASSTHROUGH_X 5 204 205 struct znode; 206 struct zfsvfs; 207 208 #ifdef _KERNEL 209 int zfs_acl_ids_create(struct znode *, int, vattr_t *, 210 cred_t *, vsecattr_t *, zfs_acl_ids_t *, zidmap_t *); 211 void zfs_acl_ids_free(zfs_acl_ids_t *); 212 boolean_t zfs_acl_ids_overquota(struct zfsvfs *, zfs_acl_ids_t *, uint64_t); 213 int zfs_getacl(struct znode *, vsecattr_t *, boolean_t, cred_t *); 214 int zfs_setacl(struct znode *, vsecattr_t *, boolean_t, cred_t *); 215 void zfs_acl_rele(void *); 216 void zfs_oldace_byteswap(ace_t *, int); 217 void zfs_ace_byteswap(void *, size_t, boolean_t); 218 extern boolean_t zfs_has_access(struct znode *zp, cred_t *cr); 219 extern int zfs_zaccess(struct znode *, int, int, boolean_t, cred_t *, 220 zidmap_t *); 221 int zfs_fastaccesschk_execute(struct znode *, cred_t *); 222 extern int zfs_zaccess_rwx(struct znode *, mode_t, int, cred_t *, zidmap_t *); 223 extern int zfs_zaccess_unix(void *, int, cred_t *); 224 extern int zfs_acl_access(struct znode *, int, cred_t *); 225 int zfs_acl_chmod_setattr(struct znode *, zfs_acl_t **, uint64_t); 226 int zfs_zaccess_delete(struct znode *, struct znode *, cred_t *, zidmap_t *); 227 int zfs_zaccess_rename(struct znode *, struct znode *, 228 struct znode *, struct znode *, cred_t *cr, zidmap_t *mnt_ns); 229 void zfs_acl_free(zfs_acl_t *); 230 int zfs_vsec_2_aclp(struct zfsvfs *, umode_t, vsecattr_t *, cred_t *, 231 struct zfs_fuid_info **, zfs_acl_t **); 232 int zfs_aclset_common(struct znode *, zfs_acl_t *, cred_t *, dmu_tx_t *); 233 uint64_t zfs_external_acl(struct znode *); 234 int zfs_znode_acl_version(struct znode *); 235 int zfs_acl_size(struct znode *, int *); 236 zfs_acl_t *zfs_acl_alloc(int); 237 zfs_acl_node_t *zfs_acl_node_alloc(size_t); 238 void zfs_acl_xform(struct znode *, zfs_acl_t *, cred_t *); 239 void zfs_acl_data_locator(void **, uint32_t *, uint32_t, boolean_t, void *); 240 uint64_t zfs_mode_compute(uint64_t, zfs_acl_t *, 241 uint64_t *, uint64_t, uint64_t); 242 int zfs_acl_node_read(struct znode *, boolean_t, zfs_acl_t **, boolean_t); 243 int zfs_acl_chown_setattr(struct znode *); 244 245 #endif 246 247 #ifdef __cplusplus 248 } 249 #endif 250 #endif /* _SYS_FS_ZFS_ACL_H */ 251