source: branches/samba-3.2.x/source/modules/vfs_zfsacl.c

Last change on this file was 228, checked in by Herwig Bauernfeind, 16 years ago

Update 3.2 branch to 3.2.6
File size: 9.4 KB
Line 
1/*
2 * Convert ZFS/NFSv4 acls to NT acls and vice versa.
3 *
4 * Copyright (C) Jiri Sasek, 2007
5 * based on the foobar.c module which is copyrighted by Volker Lendecke
6 *
7 * Many thanks to Axel Apitz for help to fix the special ace's handling
8 * issues.
9 *
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.
14 *
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.
19 *
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/>.
22 *
23 */
24
25#include "includes.h"
26#include "nfs4_acls.h"
27
28#undef DBGC_CLASS
29#define DBGC_CLASS DBGC_VFS
30
31#define ZFSACL_MODULE_NAME "zfsacl"
32
33/* zfs_get_nt_acl()
34 * read the local file's acls and return it in NT form
35 * using the NFSv4 format conversion
36 */
37static NTSTATUS zfs_get_nt_acl_common(const char *name,
38 uint32 security_info,
39 SMB4ACL_T **ppacl)
40{
41 int naces, i;
42 ace_t *acebuf;
43 SMB4ACL_T *pacl;
44 TALLOC_CTX *mem_ctx;
45
46 /* read the number of file aces */
47 if((naces = acl(name, ACE_GETACLCNT, 0, NULL)) == -1) {
48 if(errno == ENOSYS) {
49 DEBUG(9, ("acl(ACE_GETACLCNT, %s): Operation is not "
50 "supported on the filesystem where the file "
51 "reside", name));
52 } else {
53 DEBUG(9, ("acl(ACE_GETACLCNT, %s): %s ", name,
54 strerror(errno)));
55 }
56 return map_nt_error_from_unix(errno);
57 }
58 /* allocate the field of ZFS aces */
59 mem_ctx = talloc_tos();
60 acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces);
61 if(acebuf == NULL) {
62 return NT_STATUS_NO_MEMORY;
63 }
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,
67 strerror(errno)));
68 return map_nt_error_from_unix(errno);
69 }
70 /* create SMB4ACL data */
71 if((pacl = smb_create_smb4acl()) == NULL) {
72 return NT_STATUS_NO_MEMORY;
73 }
74 for(i=0; i<naces; i++) {
75 SMB_ACE4PROP_T aceprop;
76
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;
81
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;
91 } else {
92 aceprop.flags = 0;
93 }
94 if(smb_add_ace4(pacl, &aceprop) == NULL)
95 return NT_STATUS_NO_MEMORY;
96 }
97
98 *ppacl = pacl;
99 return NT_STATUS_OK;
100}
101
102/* call-back function processing the NT acl -> ZFS acl using NFSv4 conv. */
103static bool zfs_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl)
104{
105 int naces = smb_get_naces(smbacl), i;
106 ace_t *acebuf;
107 SMB4ACE_T *smbace;
108 TALLOC_CTX *mem_ctx;
109
110 /* allocate the field of ZFS aces */
111 mem_ctx = talloc_tos();
112 acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces);
113 if(acebuf == NULL) {
114 errno = ENOMEM;
115 return False;
116 }
117 /* handle all aces */
118 for(smbace = smb_first_ace4(smbacl), i = 0;
119 smbace!=NULL;
120 smbace = smb_next_ace4(smbace), i++) {
121 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
122
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;
131 break;
132 case SMB_ACE4_WHO_OWNER:
133 acebuf[i].a_flags |= ACE_OWNER;
134 break;
135 case SMB_ACE4_WHO_GROUP:
136 acebuf[i].a_flags |= ACE_GROUP;
137 break;
138 default:
139 DEBUG(8, ("unsupported special_id %d\n", \
140 aceprop->who.special_id));
141 continue; /* don't add it !!! */
142 }
143 }
144 }
145 SMB_ASSERT(i == naces);
146
147 /* store acl */
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));
153 } else {
154 DEBUG(9, ("acl(ACE_SETACL, %s): %s ", fsp->fsp_name,
155 strerror(errno)));
156 }
157 return 0;
158 }
159
160 return True;
161}
162
163/* zfs_set_nt_acl()
164 * set the local file's acls obtaining it in NT form
165 * using the NFSv4 format conversion
166 */
167static NTSTATUS zfs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
168 uint32 security_info_sent,
169 struct security_descriptor *psd)
170{
171 return smb_set_nt_acl_nfs4(fsp, security_info_sent, psd,
172 zfs_process_smbacl);
173}
174
175static NTSTATUS zfsacl_fget_nt_acl(struct vfs_handle_struct *handle,
176 struct files_struct *fsp,
177 uint32 security_info,
178 struct security_descriptor **ppdesc)
179{
180 SMB4ACL_T *pacl;
181 NTSTATUS status;
182
183 status = zfs_get_nt_acl_common(fsp->fsp_name, security_info, &pacl);
184 if (!NT_STATUS_IS_OK(status)) {
185 return status;
186 }
187
188 return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl);
189}
190
191static NTSTATUS zfsacl_get_nt_acl(struct vfs_handle_struct *handle,
192 const char *name, uint32 security_info,
193 struct security_descriptor **ppdesc)
194{
195 SMB4ACL_T *pacl;
196 NTSTATUS status;
197
198 status = zfs_get_nt_acl_common(name, security_info, &pacl);
199 if (!NT_STATUS_IS_OK(status)) {
200 return status;
201 }
202
203 return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc,
204 pacl);
205}
206
207static NTSTATUS zfsacl_fset_nt_acl(vfs_handle_struct *handle,
208 files_struct *fsp,
209 uint32 security_info_sent,
210 SEC_DESC *psd)
211{
212 return zfs_set_nt_acl(handle, fsp, security_info_sent, psd);
213}
214
215static NTSTATUS zfsacl_set_nt_acl(vfs_handle_struct *handle,
216 files_struct *fsp,
217 const char *name, uint32 security_info_sent,
218 SEC_DESC *psd)
219{
220 return zfs_set_nt_acl(handle, fsp, security_info_sent, psd);
221}
222
223/* nils.goroll@hamburg.de 2008-06-16 :
224
225 See also
226 - https://bugzilla.samba.org/show_bug.cgi?id=5446
227 - http://bugs.opensolaris.org/view_bug.do?bug_id=6688240
228
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.
232
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
235 mounts on Solaris.
236
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.
243
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
246 methods here.
247
248 For this to work, we need to make sure that this module is initialised
249 *after* vfs_solarisacl
250
251 Function declarations taken from vfs_solarisacl
252*/
253
254SMB_ACL_T zfsacl_fail__sys_acl_get_file(vfs_handle_struct *handle,
255 const char *path_p,
256 SMB_ACL_TYPE_T type)
257{
258 return (SMB_ACL_T)NULL;
259}
260SMB_ACL_T zfsacl_fail__sys_acl_get_fd(vfs_handle_struct *handle,
261 files_struct *fsp,
262 int fd)
263{
264 return (SMB_ACL_T)NULL;
265}
266
267int zfsacl_fail__sys_acl_set_file(vfs_handle_struct *handle,
268 const char *name,
269 SMB_ACL_TYPE_T type,
270 SMB_ACL_T theacl)
271{
272 return -1;
273}
274
275int zfsacl_fail__sys_acl_set_fd(vfs_handle_struct *handle,
276 files_struct *fsp,
277 int fd, SMB_ACL_T theacl)
278{
279 return -1;
280}
281
282int zfsacl_fail__sys_acl_delete_def_file(vfs_handle_struct *handle,
283 const char *path)
284{
285 return -1;
286}
287
288/* VFS operations structure */
289
290static 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},
307
308 /* actual methods */
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}
318};
319
320NTSTATUS vfs_zfsacl_init(void);
321NTSTATUS vfs_zfsacl_init(void)
322{
323 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "zfsacl",
324 zfsacl_ops);
325}
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