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 "system/filesys.h"
27 #include "smbd/smbd.h"
28 #include "nfs4_acls.h"
30 #if HAVE_FREEBSD_SUNACL_H
35 #define DBGC_CLASS DBGC_VFS
37 #define ZFSACL_MODULE_NAME "zfsacl"
40 * read the local file's acls and return it in NT form
41 * using the NFSv4 format conversion
43 static NTSTATUS
zfs_get_nt_acl_common(TALLOC_CTX
*mem_ctx
,
45 struct SMB4ACL_T
**ppacl
)
49 struct SMB4ACL_T
*pacl
;
51 /* read the number of file aces */
52 if((naces
= acl(name
, ACE_GETACLCNT
, 0, NULL
)) == -1) {
54 DEBUG(9, ("acl(ACE_GETACLCNT, %s): Operation is not "
55 "supported on the filesystem where the file "
58 DEBUG(9, ("acl(ACE_GETACLCNT, %s): %s ", name
,
61 return map_nt_error_from_unix(errno
);
63 /* allocate the field of ZFS aces */
64 mem_ctx
= talloc_tos();
65 acebuf
= (ace_t
*) talloc_size(mem_ctx
, sizeof(ace_t
)*naces
);
67 return NT_STATUS_NO_MEMORY
;
69 /* read the aces into the field */
70 if(acl(name
, ACE_GETACL
, naces
, acebuf
) < 0) {
71 DEBUG(9, ("acl(ACE_GETACL, %s): %s ", name
,
73 return map_nt_error_from_unix(errno
);
75 /* create SMB4ACL data */
76 if((pacl
= smb_create_smb4acl(mem_ctx
)) == NULL
) {
77 return NT_STATUS_NO_MEMORY
;
79 for(i
=0; i
<naces
; i
++) {
80 SMB_ACE4PROP_T aceprop
;
82 aceprop
.aceType
= (uint32_t) acebuf
[i
].a_type
;
83 aceprop
.aceFlags
= (uint32_t) acebuf
[i
].a_flags
;
84 aceprop
.aceMask
= (uint32_t) acebuf
[i
].a_access_mask
;
85 aceprop
.who
.id
= (uint32_t) acebuf
[i
].a_who
;
87 if(aceprop
.aceFlags
& ACE_OWNER
) {
88 aceprop
.flags
= SMB_ACE4_ID_SPECIAL
;
89 aceprop
.who
.special_id
= SMB_ACE4_WHO_OWNER
;
90 } else if(aceprop
.aceFlags
& ACE_GROUP
) {
91 aceprop
.flags
= SMB_ACE4_ID_SPECIAL
;
92 aceprop
.who
.special_id
= SMB_ACE4_WHO_GROUP
;
93 } else if(aceprop
.aceFlags
& ACE_EVERYONE
) {
94 aceprop
.flags
= SMB_ACE4_ID_SPECIAL
;
95 aceprop
.who
.special_id
= SMB_ACE4_WHO_EVERYONE
;
99 if(smb_add_ace4(pacl
, &aceprop
) == NULL
)
100 return NT_STATUS_NO_MEMORY
;
107 /* call-back function processing the NT acl -> ZFS acl using NFSv4 conv. */
108 static bool zfs_process_smbacl(vfs_handle_struct
*handle
, files_struct
*fsp
,
109 struct SMB4ACL_T
*smbacl
)
111 int naces
= smb_get_naces(smbacl
), i
;
113 struct SMB4ACE_T
*smbace
;
115 bool have_special_id
= false;
117 /* allocate the field of ZFS aces */
118 mem_ctx
= talloc_tos();
119 acebuf
= (ace_t
*) talloc_size(mem_ctx
, sizeof(ace_t
)*naces
);
124 /* handle all aces */
125 for(smbace
= smb_first_ace4(smbacl
), i
= 0;
127 smbace
= smb_next_ace4(smbace
), i
++) {
128 SMB_ACE4PROP_T
*aceprop
= smb_get_ace4(smbace
);
130 acebuf
[i
].a_type
= aceprop
->aceType
;
131 acebuf
[i
].a_flags
= aceprop
->aceFlags
;
132 acebuf
[i
].a_access_mask
= aceprop
->aceMask
;
133 /* SYNC on acls is a no-op on ZFS.
135 acebuf
[i
].a_access_mask
&= ~SMB_ACE4_SYNCHRONIZE
;
136 acebuf
[i
].a_who
= aceprop
->who
.id
;
137 if(aceprop
->flags
& SMB_ACE4_ID_SPECIAL
) {
138 switch(aceprop
->who
.special_id
) {
139 case SMB_ACE4_WHO_EVERYONE
:
140 acebuf
[i
].a_flags
|= ACE_EVERYONE
;
142 case SMB_ACE4_WHO_OWNER
:
143 acebuf
[i
].a_flags
|= ACE_OWNER
;
145 case SMB_ACE4_WHO_GROUP
:
146 acebuf
[i
].a_flags
|= ACE_GROUP
|ACE_IDENTIFIER_GROUP
;
149 DEBUG(8, ("unsupported special_id %d\n", \
150 aceprop
->who
.special_id
));
151 continue; /* don't add it !!! */
153 have_special_id
= true;
158 && lp_parm_bool(fsp
->conn
->params
->service
, "zfsacl",
159 "denymissingspecial", false)) {
164 SMB_ASSERT(i
== naces
);
167 if(acl(fsp
->fsp_name
->base_name
, ACE_SETACL
, naces
, acebuf
)) {
168 if(errno
== ENOSYS
) {
169 DEBUG(9, ("acl(ACE_SETACL, %s): Operation is not "
170 "supported on the filesystem where the file "
171 "reside", fsp_str_dbg(fsp
)));
173 DEBUG(9, ("acl(ACE_SETACL, %s): %s ", fsp_str_dbg(fsp
),
183 * set the local file's acls obtaining it in NT form
184 * using the NFSv4 format conversion
186 static NTSTATUS
zfs_set_nt_acl(vfs_handle_struct
*handle
, files_struct
*fsp
,
187 uint32_t security_info_sent
,
188 const struct security_descriptor
*psd
)
190 return smb_set_nt_acl_nfs4(handle
, fsp
, security_info_sent
, psd
,
194 static NTSTATUS
zfsacl_fget_nt_acl(struct vfs_handle_struct
*handle
,
195 struct files_struct
*fsp
,
196 uint32_t security_info
,
198 struct security_descriptor
**ppdesc
)
200 struct SMB4ACL_T
*pacl
;
202 TALLOC_CTX
*frame
= talloc_stackframe();
204 status
= zfs_get_nt_acl_common(frame
,
205 fsp
->fsp_name
->base_name
,
207 if (!NT_STATUS_IS_OK(status
)) {
212 status
= smb_fget_nt_acl_nfs4(fsp
, security_info
, mem_ctx
, ppdesc
, pacl
);
217 static NTSTATUS
zfsacl_get_nt_acl(struct vfs_handle_struct
*handle
,
218 const char *name
, uint32_t security_info
,
220 struct security_descriptor
**ppdesc
)
222 struct SMB4ACL_T
*pacl
;
224 TALLOC_CTX
*frame
= talloc_stackframe();
226 status
= zfs_get_nt_acl_common(frame
, name
, &pacl
);
227 if (!NT_STATUS_IS_OK(status
)) {
232 status
= smb_get_nt_acl_nfs4(handle
->conn
, name
, security_info
,
239 static NTSTATUS
zfsacl_fset_nt_acl(vfs_handle_struct
*handle
,
241 uint32_t security_info_sent
,
242 const struct security_descriptor
*psd
)
244 return zfs_set_nt_acl(handle
, fsp
, security_info_sent
, psd
);
247 /* nils.goroll@hamburg.de 2008-06-16 :
250 - https://bugzilla.samba.org/show_bug.cgi?id=5446
251 - http://bugs.opensolaris.org/view_bug.do?bug_id=6688240
253 Solaris supports NFSv4 and ZFS ACLs through a common system call, acl(2)
254 with ACE_SETACL / ACE_GETACL / ACE_GETACLCNT, which is being wrapped for
255 use by samba in this module.
257 As the acl(2) interface is identical for ZFS and for NFS, this module,
258 vfs_zfsacl, can not only be used for ZFS, but also for sharing NFSv4
261 But while "traditional" POSIX DRAFT ACLs (using acl(2) with SETACL
262 / GETACL / GETACLCNT) fail for ZFS, the Solaris NFS client
263 implemets a compatibility wrapper, which will make calls to
264 traditional ACL calls though vfs_solarisacl succeed. As the
265 compatibility wrapper's implementation is (by design) incomplete,
266 we want to make sure that it is never being called.
268 As long as Samba does not support an exiplicit method for a module
269 to define conflicting vfs methods, we should override all conflicting
272 For this to work, we need to make sure that this module is initialised
273 *after* vfs_solarisacl
275 Function declarations taken from vfs_solarisacl
278 static SMB_ACL_T
zfsacl_fail__sys_acl_get_file(vfs_handle_struct
*handle
,
283 return (SMB_ACL_T
)NULL
;
286 static SMB_ACL_T
zfsacl_fail__sys_acl_get_fd(vfs_handle_struct
*handle
,
290 return (SMB_ACL_T
)NULL
;
293 static int zfsacl_fail__sys_acl_set_file(vfs_handle_struct
*handle
,
301 static int zfsacl_fail__sys_acl_set_fd(vfs_handle_struct
*handle
,
308 static int zfsacl_fail__sys_acl_delete_def_file(vfs_handle_struct
*handle
,
314 static int zfsacl_fail__sys_acl_blob_get_file(vfs_handle_struct
*handle
, const char *path_p
, TALLOC_CTX
*mem_ctx
, char **blob_description
, DATA_BLOB
*blob
)
319 static int zfsacl_fail__sys_acl_blob_get_fd(vfs_handle_struct
*handle
, files_struct
*fsp
, TALLOC_CTX
*mem_ctx
, char **blob_description
, DATA_BLOB
*blob
)
324 /* VFS operations structure */
326 static struct vfs_fn_pointers zfsacl_fns
= {
327 .sys_acl_get_file_fn
= zfsacl_fail__sys_acl_get_file
,
328 .sys_acl_get_fd_fn
= zfsacl_fail__sys_acl_get_fd
,
329 .sys_acl_blob_get_file_fn
= zfsacl_fail__sys_acl_blob_get_file
,
330 .sys_acl_blob_get_fd_fn
= zfsacl_fail__sys_acl_blob_get_fd
,
331 .sys_acl_set_file_fn
= zfsacl_fail__sys_acl_set_file
,
332 .sys_acl_set_fd_fn
= zfsacl_fail__sys_acl_set_fd
,
333 .sys_acl_delete_def_file_fn
= zfsacl_fail__sys_acl_delete_def_file
,
334 .fget_nt_acl_fn
= zfsacl_fget_nt_acl
,
335 .get_nt_acl_fn
= zfsacl_get_nt_acl
,
336 .fset_nt_acl_fn
= zfsacl_fset_nt_acl
,
339 NTSTATUS
vfs_zfsacl_init(void);
340 NTSTATUS
vfs_zfsacl_init(void)
342 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "zfsacl",