source: vendor/current/source3/modules/vfs_aixacl2.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 14.5 KB
Line 
1/*
2 * Convert JFS2 NFS4/AIXC acls to NT acls and vice versa.
3 *
4 * Copyright (C) Volker Lendecke, 2006
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include "includes.h"
21#include "system/filesys.h"
22#include "smbd/smbd.h"
23#include "nfs4_acls.h"
24#include "vfs_aixacl_util.h"
25
26#undef DBGC_CLASS
27#define DBGC_CLASS DBGC_VFS
28
29#define AIXACL2_MODULE_NAME "aixacl2"
30
31typedef union aixjfs2_acl_t {
32 nfs4_acl_int_t jfs2_acl[1];
33 aixc_acl_t aixc_acl[1];
34}AIXJFS2_ACL_T;
35
36static int32_t aixacl2_getlen(AIXJFS2_ACL_T *acl, acl_type_t *type)
37{
38 int32_t len;
39
40 if(type->u64 == ACL_NFS4) {
41 len = acl->jfs2_acl[0].aclLength;
42 }
43 else {
44 if(type->u64 == ACL_AIXC) {
45 len = acl->aixc_acl[0].acl_len;
46 } else {
47 DEBUG(0,("aixacl2_getlen:unknown type:%d\n",type->u64));
48 return False;
49 }
50 }
51 DEBUG(10,("aixacl2_getlen:%d\n",len));
52 return len;
53}
54
55static AIXJFS2_ACL_T *aixjfs2_getacl_alloc(const char *fname, acl_type_t *type)
56{
57 AIXJFS2_ACL_T *acl;
58 size_t len = 200;
59 mode_t mode;
60 int ret;
61 uint64_t ctl_flag=0;
62 TALLOC_CTX *mem_ctx;
63
64 mem_ctx = talloc_tos();
65 acl = (AIXJFS2_ACL_T *)TALLOC_SIZE(mem_ctx, len);
66 if (acl == NULL) {
67 errno = ENOMEM;
68 return NULL;
69 }
70
71 if(type->u64 == ACL_ANY) {
72 ctl_flag = ctl_flag | GET_ACLINFO_ONLY;
73 }
74
75 ret = aclx_get((char *)fname, ctl_flag, type, acl, &len, &mode);
76 if ((ret != 0) && (errno == ENOSPC)) {
77 len = aixacl2_getlen(acl, type) + sizeof(AIXJFS2_ACL_T);
78 DEBUG(10,("aixjfs2_getacl_alloc - acl_len:%d\n",len));
79
80 acl = (AIXJFS2_ACL_T *)TALLOC_SIZE(mem_ctx, len);
81 if (acl == NULL) {
82 errno = ENOMEM;
83 return NULL;
84 }
85
86 ret = aclx_get((char *)fname, ctl_flag, type, acl, &len, &mode);
87 }
88 if (ret != 0) {
89 DEBUG(8, ("aclx_get failed with %s\n", strerror(errno)));
90 return NULL;
91 }
92
93 return acl;
94}
95
96static bool aixjfs2_get_nfs4_acl(TALLOC_CTX *mem_ctx, const char *name,
97 struct SMB4ACL_T **ppacl, bool *pretryPosix)
98{
99 int32_t i;
100
101 AIXJFS2_ACL_T *pacl = NULL;
102 nfs4_acl_int_t *jfs2_acl = NULL;
103 nfs4_ace_int_t *jfs2_ace = NULL;
104 acl_type_t type;
105
106 DEBUG(10,("jfs2 get_nt_acl invoked for %s\n", name));
107
108 memset(&type, 0, sizeof(acl_type_t));
109 type.u64 = ACL_NFS4;
110
111 pacl = aixjfs2_getacl_alloc(name, &type);
112 if (pacl == NULL) {
113 DEBUG(9, ("aixjfs2_getacl_alloc failed for %s with %s\n",
114 name, strerror(errno)));
115 if (errno==ENOSYS)
116 *pretryPosix = True;
117 return False;
118 }
119
120 jfs2_acl = &pacl->jfs2_acl[0];
121 DEBUG(10, ("len: %d, version: %d, nace: %d, type: 0x%x\n",
122 jfs2_acl->aclLength, jfs2_acl->aclVersion, jfs2_acl->aclEntryN, type.u64));
123
124 *ppacl = smb_create_smb4acl(mem_ctx);
125 if (*ppacl==NULL)
126 return False;
127
128 jfs2_ace = &jfs2_acl->aclEntry[0];
129 for (i=0; i<jfs2_acl->aclEntryN; i++) {
130 SMB_ACE4PROP_T aceprop;
131
132 DEBUG(10, ("type: %d, iflags: %x, flags: %x, mask: %x, "
133 "who: %d, aclLen: %d\n", jfs2_ace->aceType, jfs2_ace->flags,
134 jfs2_ace->aceFlags, jfs2_ace->aceMask, jfs2_ace->aceWho.id, jfs2_ace->entryLen));
135
136 aceprop.aceType = jfs2_ace->aceType;
137 aceprop.aceFlags = jfs2_ace->aceFlags;
138 aceprop.aceMask = jfs2_ace->aceMask;
139 aceprop.flags = (jfs2_ace->flags&ACE4_ID_SPECIAL) ? SMB_ACE4_ID_SPECIAL : 0;
140
141 /* don't care it's real content is only 16 or 32 bit */
142 aceprop.who.id = jfs2_ace->aceWho.id;
143
144 if (smb_add_ace4(*ppacl, &aceprop)==NULL)
145 return False;
146
147 /* iterate to the next jfs2 ace */
148 jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2_ace) + jfs2_ace->entryLen);
149 }
150
151 DEBUG(10,("jfs2 get_nt_acl finished successfully\n"));
152
153 return True;
154}
155
156static NTSTATUS aixjfs2_fget_nt_acl(vfs_handle_struct *handle,
157 files_struct *fsp, uint32_t security_info,
158 TALLOC_CTX *mem_ctx,
159 struct security_descriptor **ppdesc)
160{
161 NTSTATUS status;
162 struct SMB4ACL_T *pacl = NULL;
163 bool result;
164 bool retryPosix = False;
165 TALLOC_CTX *frame = talloc_stackframe();
166
167 *ppdesc = NULL;
168 result = aixjfs2_get_nfs4_acl(frame, fsp->fsp_name->base_name, &pacl,
169 &retryPosix);
170 if (retryPosix)
171 {
172 TALLOC_FREE(frame);
173 DEBUG(10, ("retrying with posix acl...\n"));
174 return posix_fget_nt_acl(fsp, security_info,
175 mem_ctx, ppdesc);
176 }
177 if (result==False) {
178 TALLOC_FREE(frame);
179 return NT_STATUS_ACCESS_DENIED;
180 }
181
182 status = smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc,
183 mem_ctx, pacl);
184 TALLOC_FREE(frame);
185 return status;
186}
187
188static NTSTATUS aixjfs2_get_nt_acl(vfs_handle_struct *handle,
189 const char *name,
190 uint32_t security_info,
191 TALLOC_CTX *mem_ctx,
192 struct security_descriptor **ppdesc)
193{
194 struct SMB4ACL_T *pacl = NULL;
195 bool result;
196 bool retryPosix = False;
197
198 *ppdesc = NULL;
199 result = aixjfs2_get_nfs4_acl(mem_ctx, name, &pacl, &retryPosix);
200 if (retryPosix)
201 {
202 DEBUG(10, ("retrying with posix acl...\n"));
203 return posix_get_nt_acl(handle->conn, name, security_info,
204 mem_ctx, ppdesc);
205 }
206 if (result==False)
207 return NT_STATUS_ACCESS_DENIED;
208
209 return smb_get_nt_acl_nfs4(handle->conn, name, security_info,
210 mem_ctx, ppdesc,
211 pacl);
212}
213
214static int aixjfs2_sys_acl_blob_get_file(vfs_handle_struct *handle, const char *path_p, TALLOC_CTX *mem_ctx, char **blob_description, DATA_BLOB *blob)
215{
216 struct SMB4ACL_T *pacl = NULL;
217 bool result;
218 bool retryPosix = False;
219
220 result = aixjfs2_get_nfs4_acl(mem_ctx, path_p, &pacl, &retryPosix);
221 if (retryPosix)
222 {
223 return posix_sys_acl_blob_get_file(handle, path_p, mem_ctx,
224 blob_description, blob);
225 }
226 /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
227 errno = ENOSYS;
228 return -1;
229}
230
231static int aixjfs2_sys_acl_blob_get_fd(vfs_handle_struct *handle, files_struct *fsp, TALLOC_CTX *mem_ctx, char **blob_description, DATA_BLOB *blob)
232{
233 struct SMB4ACL_T *pacl = NULL;
234 bool result;
235 bool retryPosix = False;
236
237 result = aixjfs2_get_nfs4_acl(mem_ctx, fsp->fsp_name->base_name, &pacl,
238 &retryPosix);
239 if (retryPosix)
240 {
241 return posix_sys_acl_blob_get_fd(handle, fsp, mem_ctx, blob_description, blob);
242 }
243
244 /* Now way to linarlise NFS4 ACLs at the moment, but the NT ACL is pretty close in this case */
245 errno = ENOSYS;
246 return -1;
247}
248
249static SMB_ACL_T aixjfs2_get_posix_acl(const char *path, acl_type_t type, TALLOC_CTX *mem_ctx)
250{
251 aixc_acl_t *pacl;
252 AIXJFS2_ACL_T *acl;
253 SMB_ACL_T result = NULL;
254 int ret;
255
256 acl = aixjfs2_getacl_alloc(path, &type);
257
258 if (acl == NULL) {
259 DEBUG(10, ("aixjfs2_getacl failed for %s with %s\n",
260 path, strerror(errno)));
261 if (errno == 0) {
262 errno = EINVAL;
263 }
264 goto done;
265 }
266
267 pacl = &acl->aixc_acl[0];
268 DEBUG(10, ("len: %d, mode: %d\n",
269 pacl->acl_len, pacl->acl_mode));
270
271 result = aixacl_to_smbacl(pacl, mem_ctx);
272 if (result == NULL) {
273 goto done;
274 }
275
276 done:
277 if (errno != 0) {
278 TALLOC_FREE(result);
279 }
280 return result;
281}
282
283SMB_ACL_T aixjfs2_sys_acl_get_file(vfs_handle_struct *handle,
284 const char *path_p,
285 SMB_ACL_TYPE_T type,
286 TALLOC_CTX *mem_ctx)
287{
288 acl_type_t aixjfs2_type;
289
290 switch(type) {
291 case SMB_ACL_TYPE_ACCESS:
292 aixjfs2_type.u64 = ACL_AIXC;
293 break;
294 case SMB_ACL_TYPE_DEFAULT:
295 DEBUG(0, ("Got AIX JFS2 unsupported type: %d\n", type));
296 return NULL;
297 default:
298 DEBUG(0, ("Got invalid type: %d\n", type));
299 smb_panic("exiting");
300 }
301
302 return aixjfs2_get_posix_acl(path_p, aixjfs2_type, mem_ctx);
303}
304
305SMB_ACL_T aixjfs2_sys_acl_get_fd(vfs_handle_struct *handle,
306 files_struct *fsp, TALLOC_CTX *mem_ctx)
307{
308 acl_type_t aixjfs2_type;
309 aixjfs2_type.u64 = ACL_AIXC;
310
311 return aixjfs2_get_posix_acl(fsp->fsp_name->base_name,
312 aixjfs2_type, mem_ctx);
313}
314
315/*
316 * Test whether we have that aclType support on the given path
317 */
318static int aixjfs2_query_acl_support(
319 char *filepath,
320 uint64_t aclType,
321 acl_type_t *pacl_type_info
322)
323{
324 acl_types_list_t acl_type_list;
325 size_t acl_type_list_len = sizeof(acl_types_list_t);
326 uint32_t i;
327
328 memset(&acl_type_list, 0, sizeof(acl_type_list));
329
330 if (aclx_gettypes(filepath, &acl_type_list, &acl_type_list_len)) {
331 DEBUG(2, ("aclx_gettypes failed with error %s for %s\n",
332 strerror(errno), filepath));
333 return -1;
334 }
335
336 for(i=0; i<acl_type_list.num_entries; i++) {
337 if (acl_type_list.entries[i].u64==aclType) {
338 memcpy(pacl_type_info, acl_type_list.entries + i, sizeof(acl_type_t));
339 DEBUG(10, ("found %s ACL support for %s\n",
340 pacl_type_info->acl_type, filepath));
341 return 0;
342 }
343 }
344
345 return 1; /* haven't found that ACL type. */
346}
347
348static bool aixjfs2_process_smbacl(vfs_handle_struct *handle,
349 files_struct *fsp,
350 struct SMB4ACL_T *smbacl)
351{
352 struct SMB4ACE_T *smbace;
353 TALLOC_CTX *mem_ctx;
354 nfs4_acl_int_t *jfs2acl;
355 int32_t entryLen;
356 uint32_t aclLen, naces;
357 int rc;
358 acl_type_t acltype;
359
360 DEBUG(10, ("jfs2_process_smbacl invoked on %s\n", fsp_str_dbg(fsp)));
361
362 /* no need to be freed which is alloced with mem_ctx */
363 mem_ctx = talloc_tos();
364
365 entryLen = sizeof(nfs4_ace_int_t);
366 if (entryLen & 0x03)
367 entryLen = entryLen + 4 - (entryLen%4);
368
369 naces = smb_get_naces(smbacl);
370 aclLen = ACL_V4_SIZ + naces * entryLen;
371 jfs2acl = (nfs4_acl_int_t *)TALLOC_SIZE(mem_ctx, aclLen);
372 if (jfs2acl==NULL) {
373 DEBUG(0, ("TALLOC_SIZE failed\n"));
374 errno = ENOMEM;
375 return False;
376 }
377
378 jfs2acl->aclLength = ACL_V4_SIZ;
379 jfs2acl->aclVersion = NFS4_ACL_INT_STRUCT_VERSION;
380 jfs2acl->aclEntryN = 0;
381
382 for(smbace = smb_first_ace4(smbacl); smbace!=NULL; smbace = smb_next_ace4(smbace))
383 {
384 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace);
385 nfs4_ace_int_t *jfs2_ace = (nfs4_ace_int_t *)(((char *)jfs2acl) + jfs2acl->aclLength);
386
387 memset(jfs2_ace, 0, entryLen);
388 jfs2_ace->entryLen = entryLen; /* won't store textual "who" */
389 jfs2_ace->aceType = aceprop->aceType; /* only ACCES|DENY supported by jfs2 */
390 jfs2_ace->aceFlags = aceprop->aceFlags;
391 jfs2_ace->aceMask = aceprop->aceMask;
392 jfs2_ace->flags = (aceprop->flags&SMB_ACE4_ID_SPECIAL) ? ACE4_ID_SPECIAL : 0;
393
394 /* don't care it's real content is only 16 or 32 bit */
395 jfs2_ace->aceWho.id = aceprop->who.id;
396
397 /* iterate to the next jfs2 ace */
398 jfs2acl->aclLength += jfs2_ace->entryLen;
399 jfs2acl->aclEntryN++;
400 }
401 SMB_ASSERT(jfs2acl->aclEntryN==naces);
402
403 /* Don't query it (again) */
404 memset(&acltype, 0, sizeof(acl_type_t));
405 acltype.u64 = ACL_NFS4;
406
407 /* won't set S_ISUID - the only one JFS2/NFS4 accepts */
408 rc = aclx_put(
409 fsp->fsp_name->base_name,
410 SET_ACL, /* set only the ACL, not mode bits */
411 acltype, /* not a pointer !!! */
412 jfs2acl,
413 jfs2acl->aclLength,
414 0 /* don't set here mode bits */
415 );
416 if (rc) {
417 DEBUG(8, ("aclx_put failed with %s\n", strerror(errno)));
418 return False;
419 }
420
421 DEBUG(10, ("jfs2_process_smbacl succeeded.\n"));
422 return True;
423}
424
425static NTSTATUS aixjfs2_set_nt_acl_common(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
426{
427 acl_type_t acl_type_info;
428 NTSTATUS result = NT_STATUS_ACCESS_DENIED;
429 int rc;
430
431 rc = aixjfs2_query_acl_support(
432 fsp->fsp_name->base_name,
433 ACL_NFS4,
434 &acl_type_info);
435
436 if (rc==0)
437 {
438 result = smb_set_nt_acl_nfs4(handle,
439 fsp, security_info_sent, psd,
440 aixjfs2_process_smbacl);
441 } else if (rc==1) { /* assume POSIX ACL - by default... */
442 result = set_nt_acl(fsp, security_info_sent, psd);
443 } else
444 result = map_nt_error_from_unix(errno); /* query failed */
445
446 return result;
447}
448
449NTSTATUS aixjfs2_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
450{
451 return aixjfs2_set_nt_acl_common(handle, fsp, security_info_sent, psd);
452}
453
454int aixjfs2_sys_acl_set_file(vfs_handle_struct *handle,
455 const char *name,
456 SMB_ACL_TYPE_T type,
457 SMB_ACL_T theacl)
458{
459 struct acl *acl_aixc;
460 acl_type_t acl_type_info;
461 int rc;
462
463 DEBUG(10, ("aixjfs2_sys_acl_set_file invoked for %s", name));
464
465 rc = aixjfs2_query_acl_support((char *)name, ACL_AIXC, &acl_type_info);
466 if (rc) {
467 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
468 return -1;
469 }
470
471 acl_aixc = aixacl_smb_to_aixacl(type, theacl);
472 if (!acl_aixc)
473 return -1;
474
475 rc = aclx_put(
476 (char *)name,
477 SET_ACL, /* set only the ACL, not mode bits */
478 acl_type_info,
479 acl_aixc,
480 acl_aixc->acl_len,
481 0
482 );
483 if (rc) {
484 DEBUG(2, ("aclx_put failed with %s for %s\n",
485 strerror(errno), name));
486 return -1;
487 }
488
489 return 0;
490}
491
492int aixjfs2_sys_acl_set_fd(vfs_handle_struct *handle,
493 files_struct *fsp,
494 SMB_ACL_T theacl)
495{
496 struct acl *acl_aixc;
497 acl_type_t acl_type_info;
498 int rc;
499
500 DEBUG(10, ("aixjfs2_sys_acl_set_fd invoked for %s", fsp_str_dbg(fsp)));
501
502 rc = aixjfs2_query_acl_support(fsp->fsp_name->base_name, ACL_AIXC,
503 &acl_type_info);
504 if (rc) {
505 DEBUG(8, ("jfs2_set_nt_acl: AIXC support not found\n"));
506 return -1;
507 }
508
509 acl_aixc = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
510 if (!acl_aixc)
511 return -1;
512
513 rc = aclx_fput(
514 fsp->fh->fd,
515 SET_ACL, /* set only the ACL, not mode bits */
516 acl_type_info,
517 acl_aixc,
518 acl_aixc->acl_len,
519 0
520 );
521 if (rc) {
522 DEBUG(2, ("aclx_fput failed with %s for %s\n",
523 strerror(errno), fsp_str_dbg(fsp)));
524 return -1;
525 }
526
527 return 0;
528}
529
530int aixjfs2_sys_acl_delete_def_file(vfs_handle_struct *handle,
531 const char *path)
532{
533 /* Not available under AIXC ACL */
534 /* Don't report here any error otherwise */
535 /* upper layer will break the normal execution */
536 return 0;
537}
538
539static struct vfs_fn_pointers vfs_aixacl2_fns = {
540 .fget_nt_acl_fn = aixjfs2_fget_nt_acl,
541 .get_nt_acl_fn = aixjfs2_get_nt_acl,
542 .fset_nt_acl_fn = aixjfs2_fset_nt_acl,
543 .sys_acl_get_file_fn = aixjfs2_sys_acl_get_file,
544 .sys_acl_get_fd_fn = aixjfs2_sys_acl_get_fd,
545 .sys_acl_blob_get_file_fn = aixjfs2_sys_acl_blob_get_file,
546 .sys_acl_blob_get_fd_fn = aixjfs2_sys_acl_blob_get_fd,
547 .sys_acl_set_file_fn = aixjfs2_sys_acl_set_file,
548 .sys_acl_set_fd_fn = aixjfs2_sys_acl_set_fd,
549 .sys_acl_delete_def_file_fn = aixjfs2_sys_acl_delete_def_file
550};
551
552NTSTATUS vfs_aixacl2_init(void);
553NTSTATUS vfs_aixacl2_init(void)
554{
555 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, AIXACL2_MODULE_NAME,
556 &vfs_aixacl2_fns);
557}
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