2 * Convert ZFS/NFSv4 acls to NT acls and vice versa.
4 * Copyright (C) Jiri Sasek, 2007
5 * based on the foobar.c module which is copyrighted by Volker Lendecke
7 * Many thanks to Axel Apitz for help to fix the special ace's handling
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 #include "nfs4_acls.h"
29 #define DBGC_CLASS DBGC_VFS
31 #define ZFSACL_MODULE_NAME "zfsacl"
34 * read the local file's acls and return it in NT form
35 * using the NFSv4 format conversion
37 static NTSTATUS
zfs_get_nt_acl_common(const char *name
,
46 /* read the number of file aces */
47 if((naces
= acl(name
, ACE_GETACLCNT
, 0, NULL
)) == -1) {
49 DEBUG(9, ("acl(ACE_GETACLCNT, %s): Operation is not "
50 "supported on the filesystem where the file "
53 DEBUG(9, ("acl(ACE_GETACLCNT, %s): %s ", name
,
56 return map_nt_error_from_unix(errno
);
58 /* allocate the field of ZFS aces */
59 mem_ctx
= talloc_tos();
60 acebuf
= (ace_t
*) talloc_size(mem_ctx
, sizeof(ace_t
)*naces
);
62 return NT_STATUS_NO_MEMORY
;
64 /* read the aces into the field */
65 if(acl(name
, ACE_GETACL
, naces
, acebuf
) < 0) {
66 DEBUG(9, ("acl(ACE_GETACL, %s): %s ", name
,
68 return map_nt_error_from_unix(errno
);
70 /* create SMB4ACL data */
71 if((pacl
= smb_create_smb4acl()) == NULL
) {
72 return NT_STATUS_NO_MEMORY
;
74 for(i
=0; i
<naces
; i
++) {
75 SMB_ACE4PROP_T aceprop
;
77 aceprop
.aceType
= (uint32
) acebuf
[i
].a_type
;
78 aceprop
.aceFlags
= (uint32
) acebuf
[i
].a_flags
;
79 aceprop
.aceMask
= (uint32
) acebuf
[i
].a_access_mask
;
80 aceprop
.who
.id
= (uint32
) acebuf
[i
].a_who
;
82 if(aceprop
.aceFlags
& ACE_OWNER
) {
83 aceprop
.flags
= SMB_ACE4_ID_SPECIAL
;
84 aceprop
.who
.special_id
= SMB_ACE4_WHO_OWNER
;
85 } else if(aceprop
.aceFlags
& ACE_GROUP
) {
86 aceprop
.flags
= SMB_ACE4_ID_SPECIAL
;
87 aceprop
.who
.special_id
= SMB_ACE4_WHO_GROUP
;
88 } else if(aceprop
.aceFlags
& ACE_EVERYONE
) {
89 aceprop
.flags
= SMB_ACE4_ID_SPECIAL
;
90 aceprop
.who
.special_id
= SMB_ACE4_WHO_EVERYONE
;
94 if(smb_add_ace4(pacl
, &aceprop
) == NULL
)
95 return NT_STATUS_NO_MEMORY
;
102 /* call-back function processing the NT acl -> ZFS acl using NFSv4 conv. */
103 static bool zfs_process_smbacl(files_struct
*fsp
, SMB4ACL_T
*smbacl
)
105 int naces
= smb_get_naces(smbacl
), i
;
110 /* allocate the field of ZFS aces */
111 mem_ctx
= talloc_tos();
112 acebuf
= (ace_t
*) talloc_size(mem_ctx
, sizeof(ace_t
)*naces
);
117 /* handle all aces */
118 for(smbace
= smb_first_ace4(smbacl
), i
= 0;
120 smbace
= smb_next_ace4(smbace
), i
++) {
121 SMB_ACE4PROP_T
*aceprop
= smb_get_ace4(smbace
);
123 acebuf
[i
].a_type
= aceprop
->aceType
;
124 acebuf
[i
].a_flags
= aceprop
->aceFlags
;
125 acebuf
[i
].a_access_mask
= aceprop
->aceMask
;
126 acebuf
[i
].a_who
= aceprop
->who
.id
;
127 if(aceprop
->flags
& SMB_ACE4_ID_SPECIAL
) {
128 switch(aceprop
->who
.special_id
) {
129 case SMB_ACE4_WHO_EVERYONE
:
130 acebuf
[i
].a_flags
|= ACE_EVERYONE
;
132 case SMB_ACE4_WHO_OWNER
:
133 acebuf
[i
].a_flags
|= ACE_OWNER
;
135 case SMB_ACE4_WHO_GROUP
:
136 acebuf
[i
].a_flags
|= ACE_GROUP
;
139 DEBUG(8, ("unsupported special_id %d\n", \
140 aceprop
->who
.special_id
));
141 continue; /* don't add it !!! */
145 SMB_ASSERT(i
== naces
);
148 if(acl(fsp
->fsp_name
, ACE_SETACL
, naces
, acebuf
)) {
149 if(errno
== ENOSYS
) {
150 DEBUG(9, ("acl(ACE_SETACL, %s): Operation is not "
151 "supported on the filesystem where the file "
152 "reside", fsp
->fsp_name
));
154 DEBUG(9, ("acl(ACE_SETACL, %s): %s ", fsp
->fsp_name
,
164 * set the local file's acls obtaining it in NT form
165 * using the NFSv4 format conversion
167 static NTSTATUS
zfs_set_nt_acl(vfs_handle_struct
*handle
, files_struct
*fsp
,
168 uint32 security_info_sent
,
169 struct security_descriptor
*psd
)
171 return smb_set_nt_acl_nfs4(fsp
, security_info_sent
, psd
,
175 static NTSTATUS
zfsacl_fget_nt_acl(struct vfs_handle_struct
*handle
,
176 struct files_struct
*fsp
,
177 uint32 security_info
,
178 struct security_descriptor
**ppdesc
)
183 status
= zfs_get_nt_acl_common(fsp
->fsp_name
, security_info
, &pacl
);
184 if (!NT_STATUS_IS_OK(status
)) {
188 return smb_fget_nt_acl_nfs4(fsp
, security_info
, ppdesc
, pacl
);
191 static NTSTATUS
zfsacl_get_nt_acl(struct vfs_handle_struct
*handle
,
192 const char *name
, uint32 security_info
,
193 struct security_descriptor
**ppdesc
)
198 status
= zfs_get_nt_acl_common(name
, security_info
, &pacl
);
199 if (!NT_STATUS_IS_OK(status
)) {
203 return smb_get_nt_acl_nfs4(handle
->conn
, name
, security_info
, ppdesc
,
207 static NTSTATUS
zfsacl_fset_nt_acl(vfs_handle_struct
*handle
,
209 uint32 security_info_sent
,
212 return zfs_set_nt_acl(handle
, fsp
, security_info_sent
, psd
);
215 static NTSTATUS
zfsacl_set_nt_acl(vfs_handle_struct
*handle
,
217 const char *name
, uint32 security_info_sent
,
220 return zfs_set_nt_acl(handle
, fsp
, security_info_sent
, psd
);
223 /* nils.goroll@hamburg.de 2008-06-16 :
226 - https://bugzilla.samba.org/show_bug.cgi?id=5446
227 - http://bugs.opensolaris.org/view_bug.do?bug_id=6688240
229 Solaris supports NFSv4 and ZFS ACLs through a common system call, acl(2)
230 with ACE_SETACL / ACE_GETACL / ACE_GETACLCNT, which is being wrapped for
231 use by samba in this module.
233 As the acl(2) interface is identical for ZFS and for NFS, this module,
234 vfs_zfsacl, can not only be used for ZFS, but also for sharing NFSv4
237 But while "traditional" POSIX DRAFT ACLs (using acl(2) with SETACL
238 / GETACL / GETACLCNT) fail for ZFS, the Solaris NFS client
239 implemets a compatibility wrapper, which will make calls to
240 traditional ACL calls though vfs_solarisacl succeed. As the
241 compatibility wrapper's implementation is (by design) incomplete,
242 we want to make sure that it is never being called.
244 As long as Samba does not support an exiplicit method for a module
245 to define conflicting vfs methods, we should override all conflicting
248 For this to work, we need to make sure that this module is initialised
249 *after* vfs_solarisacl
251 Function declarations taken from vfs_solarisacl
254 SMB_ACL_T
zfsacl_fail__sys_acl_get_file(vfs_handle_struct
*handle
,
258 return (SMB_ACL_T
)NULL
;
260 SMB_ACL_T
zfsacl_fail__sys_acl_get_fd(vfs_handle_struct
*handle
,
264 return (SMB_ACL_T
)NULL
;
267 int zfsacl_fail__sys_acl_set_file(vfs_handle_struct
*handle
,
275 int zfsacl_fail__sys_acl_set_fd(vfs_handle_struct
*handle
,
277 int fd
, SMB_ACL_T theacl
)
282 int zfsacl_fail__sys_acl_delete_def_file(vfs_handle_struct
*handle
,
288 /* VFS operations structure */
290 static vfs_op_tuple zfsacl_ops
[] = {
291 /* invalidate conflicting VFS methods */
292 {SMB_VFS_OP(zfsacl_fail__sys_acl_get_file
),
293 SMB_VFS_OP_SYS_ACL_GET_FILE
,
294 SMB_VFS_LAYER_OPAQUE
},
295 {SMB_VFS_OP(zfsacl_fail__sys_acl_get_fd
),
296 SMB_VFS_OP_SYS_ACL_GET_FD
,
297 SMB_VFS_LAYER_OPAQUE
},
298 {SMB_VFS_OP(zfsacl_fail__sys_acl_set_file
),
299 SMB_VFS_OP_SYS_ACL_SET_FILE
,
300 SMB_VFS_LAYER_OPAQUE
},
301 {SMB_VFS_OP(zfsacl_fail__sys_acl_set_fd
),
302 SMB_VFS_OP_SYS_ACL_SET_FD
,
303 SMB_VFS_LAYER_OPAQUE
},
304 {SMB_VFS_OP(zfsacl_fail__sys_acl_delete_def_file
),
305 SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE
,
306 SMB_VFS_LAYER_OPAQUE
},
309 {SMB_VFS_OP(zfsacl_fget_nt_acl
), SMB_VFS_OP_FGET_NT_ACL
,
310 SMB_VFS_LAYER_OPAQUE
},
311 {SMB_VFS_OP(zfsacl_get_nt_acl
), SMB_VFS_OP_GET_NT_ACL
,
312 SMB_VFS_LAYER_OPAQUE
},
313 {SMB_VFS_OP(zfsacl_fset_nt_acl
), SMB_VFS_OP_FSET_NT_ACL
,
314 SMB_VFS_LAYER_OPAQUE
},
315 {SMB_VFS_OP(zfsacl_set_nt_acl
), SMB_VFS_OP_SET_NT_ACL
,
316 SMB_VFS_LAYER_OPAQUE
},
317 {SMB_VFS_OP(NULL
), SMB_VFS_OP_NOOP
, SMB_VFS_LAYER_NOOP
}
320 NTSTATUS
vfs_zfsacl_init(void);
321 NTSTATUS
vfs_zfsacl_init(void)
323 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "zfsacl",