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 */ 247