zfs/lib/libzcommon/include/sys/zfs_acl.h

   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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_FS_ZFS_ACL_H
  27 #define _SYS_FS_ZFS_ACL_H
  28
  29 #pragma ident   "@(#)zfs_acl.h  1.9     08/04/08 SMI"
  30
  31 #ifdef _KERNEL
  32 #include <sys/isa_defs.h>
  33 #include <sys/types32.h>
  34 #endif
  35 #include <sys/acl.h>
  36 #include <sys/dmu.h>
  37 #include <sys/zfs_fuid.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 are store in various forms.
  52  * Files created with ACL version ZFS_ACL_VERSION_INITIAL
  53  * will all be created with fixed length ACEs of type
  54  * zfs_oldace_t.
  55  *
  56  * Files with ACL version ZFS_ACL_VERSION_FUID will be created
  57  * with various sized ACEs.  The abstraction entries will utilize
  58  * zfs_ace_hdr_t, normal user/group entries will use zfs_ace_t
  59  * and some specialized CIFS ACEs will use zfs_object_ace_t.
  60  */
  61
  62 /*
  63  * All ACEs have a common hdr.  For
  64  * owner@, group@, and everyone@ this is all
  65  * thats needed.
  66  */
  67 typedef struct zfs_ace_hdr {
  68         uint16_t z_type;
  69         uint16_t z_flags;
  70         uint32_t z_access_mask;
  71 } zfs_ace_hdr_t;
  72
  73 typedef zfs_ace_hdr_t zfs_ace_abstract_t;
  74
  75 /*
  76  * Standard ACE
  77  */
  78 typedef struct zfs_ace {
  79         zfs_ace_hdr_t   z_hdr;
  80         uint64_t        z_fuid;
  81 } zfs_ace_t;
  82
  83 /*
  84  * The following type only applies to ACE_ACCESS_ALLOWED|DENIED_OBJECT_ACE_TYPE
  85  * and will only be set/retrieved in a CIFS context.
  86  */
  87
  88 typedef struct zfs_object_ace {
  89         zfs_ace_t       z_ace;
  90         uint8_t         z_object_type[16]; /* object type */
  91         uint8_t         z_inherit_type[16]; /* inherited object type */
  92 } zfs_object_ace_t;
  93
  94 typedef struct zfs_oldace {
  95         uint32_t        z_fuid;         /* "who" */
  96         uint32_t        z_access_mask;  /* access mask */
  97         uint16_t        z_flags;        /* flags, i.e inheritance */
  98         uint16_t        z_type;         /* type of entry allow/deny */
  99 } zfs_oldace_t;
 100
 101 typedef struct zfs_acl_phys_v0 {
 102         uint64_t        z_acl_extern_obj;       /* ext acl pieces */
 103         uint32_t        z_acl_count;            /* Number of ACEs */
 104         uint16_t        z_acl_version;          /* acl version */
 105         uint16_t        z_acl_pad;              /* pad */
 106         zfs_oldace_t    z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */
 107 } zfs_acl_phys_v0_t;
 108
 109 #define ZFS_ACE_SPACE   (sizeof (zfs_oldace_t) * ACE_SLOT_CNT)
 110
 111 typedef struct zfs_acl_phys {
 112         uint64_t        z_acl_extern_obj;         /* ext acl pieces */
 113         uint32_t        z_acl_size;               /* Number of bytes in ACL */
 114         uint16_t        z_acl_version;            /* acl version */
 115         uint16_t        z_acl_count;              /* ace count */
 116         uint8_t         z_ace_data[ZFS_ACE_SPACE]; /* space for embedded ACEs */
 117 } zfs_acl_phys_t;
 118
 119
 120
 121 typedef struct acl_ops {
 122         uint32_t        (*ace_mask_get) (void *acep); /* get  access mask */
 123         void            (*ace_mask_set) (void *acep,
 124                             uint32_t mask); /* set access mask */
 125         uint16_t        (*ace_flags_get) (void *acep);  /* get flags */
 126         void            (*ace_flags_set) (void *acep,
 127                             uint16_t flags); /* set flags */
 128         uint16_t        (*ace_type_get)(void *acep); /* get type */
 129         void            (*ace_type_set)(void *acep,
 130                             uint16_t type); /* set type */
 131         uint64_t        (*ace_who_get)(void *acep); /* get who/fuid */
 132         void            (*ace_who_set)(void *acep,
 133                             uint64_t who); /* set who/fuid */
 134         size_t          (*ace_size)(void *acep); /* how big is this ace */
 135         size_t          (*ace_abstract_size)(void); /* sizeof abstract entry */
 136         int             (*ace_mask_off)(void); /* off of access mask in ace */
 137         int             (*ace_data)(void *acep, void **datap);
 138                             /* ptr to data if any */
 139 } acl_ops_t;
 140
 141 /*
 142  * A zfs_acl_t structure is composed of a list of zfs_acl_node_t's.
 143  * Each node will have one or more ACEs associated with it.  You will
 144  * only have multiple nodes during a chmod operation.   Normally only
 145  * one node is required.
 146  */
 147 typedef struct zfs_acl_node {
 148         list_node_t     z_next;         /* Next chunk of ACEs */
 149         void            *z_acldata;     /* pointer into actual ACE(s) */
 150         void            *z_allocdata;   /* pointer to kmem allocated memory */
 151         size_t          z_allocsize;    /* Size of blob in bytes */
 152         size_t          z_size;         /* length of ACL data */
 153         int             z_ace_count;    /* number of ACEs in this acl node */
 154         int             z_ace_idx;      /* ace iterator positioned on */
 155 } zfs_acl_node_t;
 156
 157 typedef struct zfs_acl {
 158         int             z_acl_count;    /* Number of ACEs */
 159         size_t          z_acl_bytes;    /* Number of bytes in ACL */
 160         uint_t          z_version;      /* version of ACL */
 161         void            *z_next_ace;    /* pointer to next ACE */
 162         int             z_hints;        /* ACL hints (ZFS_INHERIT_ACE ...) */
 163         zfs_acl_node_t  *z_curr_node;   /* current node iterator is handling */
 164         list_t          z_acl;          /* chunks of ACE data */
 165         acl_ops_t       z_ops;          /* ACL operations */
 166         boolean_t       z_has_fuids;    /* FUIDs present in ACL? */
 167 } zfs_acl_t;
 168
 169 #define ACL_DATA_ALLOCED        0x1
 170 #define ZFS_ACL_SIZE(aclcnt)    (sizeof (ace_t) * (aclcnt))
 171
 172 /*
 173  * Property values for acl_mode and acl_inherit.
 174  *
 175  * acl_mode can take discard, noallow, groupmask and passthrough.
 176  * whereas acl_inherit has secure instead of groupmask.
 177  */
 178
 179 #define ZFS_ACL_DISCARD         0
 180 #define ZFS_ACL_NOALLOW         1
 181 #define ZFS_ACL_GROUPMASK       2
 182 #define ZFS_ACL_PASSTHROUGH     3
 183 #define ZFS_ACL_RESTRICTED      4
 184
 185 struct znode;
 186 struct zfsvfs;
 187 struct zfs_fuid_info;
 188
 189 #ifdef _KERNEL
 190 void zfs_perm_init(struct znode *, struct znode *, int, vattr_t *,
 191     dmu_tx_t *, cred_t *, zfs_acl_t *, zfs_fuid_info_t **);
 192 int zfs_getacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
 193 int zfs_setacl(struct znode *, vsecattr_t *, boolean_t, cred_t *);
 194 void zfs_acl_rele(void *);
 195 void zfs_oldace_byteswap(ace_t *, int);
 196 void zfs_ace_byteswap(void *, size_t, boolean_t);
 197 extern int zfs_zaccess(struct znode *, int, int, boolean_t, cred_t *);
 198 extern int zfs_zaccess_rwx(struct znode *, mode_t, int, cred_t *);
 199 extern int zfs_zaccess_unix(struct znode *, mode_t, cred_t *);
 200 extern int zfs_acl_access(struct znode *, int, cred_t *);
 201 int zfs_acl_chmod_setattr(struct znode *, zfs_acl_t **, uint64_t);
 202 int zfs_zaccess_delete(struct znode *, struct znode *, cred_t *);
 203 int zfs_zaccess_rename(struct znode *, struct znode *,
 204     struct znode *, struct znode *, cred_t *cr);
 205 void zfs_acl_free(zfs_acl_t *);
 206 int zfs_vsec_2_aclp(struct zfsvfs *, vtype_t, vsecattr_t *, zfs_acl_t **);
 207 int zfs_aclset_common(struct znode *, zfs_acl_t *, cred_t *,
 208     struct zfs_fuid_info **, dmu_tx_t *);
 209
 210 #endif
 211
 212 #ifdef  __cplusplus
 213 }
 214 #endif
 215 #endif  /* _SYS_FS_ZFS_ACL_H */