source: branches/samba-3.2.x/source/modules/nfs4_acls.c

Last change on this file was 233, checked in by Herwig Bauernfeind, 16 years ago

Update 3.2 branch to 3.2.9
File size: 20.5 KB
Line 
1/*
2 * NFS4 ACL handling
3 *
4 * Copyright (C) Jim McDonough, 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 "nfs4_acls.h"
22
23#undef DBGC_CLASS
24#define DBGC_CLASS DBGC_ACLS
25
26#define SMBACL4_PARAM_TYPE_NAME "nfs4"
27
28extern const struct generic_mapping file_generic_mapping;
29
30#define SMB_ACE4_INT_MAGIC 0x76F8A967
31typedef struct _SMB_ACE4_INT_T
32{
33 uint32 magic;
34 SMB_ACE4PROP_T prop;
35 void *next;
36} SMB_ACE4_INT_T;
37
38#define SMB_ACL4_INT_MAGIC 0x29A3E792
39typedef struct _SMB_ACL4_INT_T
40{
41 uint32 magic;
42 uint32 naces;
43 SMB_ACE4_INT_T *first;
44 SMB_ACE4_INT_T *last;
45} SMB_ACL4_INT_T;
46
47extern struct current_user current_user;
48extern int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid);
49extern NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp,
50 uint32 security_info_sent, SEC_DESC *psd);
51
52static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *acl)
53{
54 SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
55 if (acl==NULL)
56 {
57 DEBUG(2, ("acl is NULL\n"));
58 errno = EINVAL;
59 return NULL;
60 }
61 if (aclint->magic!=SMB_ACL4_INT_MAGIC)
62 {
63 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
64 errno = EINVAL;
65 return NULL;
66 }
67 return aclint;
68}
69
70static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
71{
72 SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
73 if (ace==NULL)
74 {
75 DEBUG(2, ("ace is NULL\n"));
76 errno = EINVAL;
77 return NULL;
78 }
79 if (aceint->magic!=SMB_ACE4_INT_MAGIC)
80 {
81 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
82 errno = EINVAL;
83 return NULL;
84 }
85 return aceint;
86}
87
88SMB4ACL_T *smb_create_smb4acl(void)
89{
90 TALLOC_CTX *mem_ctx = talloc_tos();
91 SMB_ACL4_INT_T *acl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
92 if (acl==NULL)
93 {
94 DEBUG(0, ("TALLOC_SIZE failed\n"));
95 errno = ENOMEM;
96 return NULL;
97 }
98 acl->magic = SMB_ACL4_INT_MAGIC;
99 /* acl->first, last = NULL not needed */
100 return (SMB4ACL_T *)acl;
101}
102
103SMB4ACE_T *smb_add_ace4(SMB4ACL_T *acl, SMB_ACE4PROP_T *prop)
104{
105 SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
106 TALLOC_CTX *mem_ctx = talloc_tos();
107 SMB_ACE4_INT_T *ace;
108
109 ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
110 if (ace==NULL)
111 {
112 DEBUG(0, ("TALLOC_SIZE failed\n"));
113 errno = ENOMEM;
114 return NULL;
115 }
116 ace->magic = SMB_ACE4_INT_MAGIC;
117 /* ace->next = NULL not needed */
118 memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
119
120 if (aclint->first==NULL)
121 {
122 aclint->first = ace;
123 aclint->last = ace;
124 } else {
125 aclint->last->next = (void *)ace;
126 aclint->last = ace;
127 }
128 aclint->naces++;
129
130 return (SMB4ACE_T *)ace;
131}
132
133SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
134{
135 SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
136 if (aceint==NULL)
137 return NULL;
138
139 return &aceint->prop;
140}
141
142SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
143{
144 SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
145 if (aceint==NULL)
146 return NULL;
147
148 return (SMB4ACE_T *)aceint->next;
149}
150
151SMB4ACE_T *smb_first_ace4(SMB4ACL_T *acl)
152{
153 SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
154 if (aclint==NULL)
155 return NULL;
156
157 return (SMB4ACE_T *)aclint->first;
158}
159
160uint32 smb_get_naces(SMB4ACL_T *acl)
161{
162 SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
163 if (aclint==NULL)
164 return 0;
165
166 return aclint->naces;
167}
168
169static int smbacl4_GetFileOwner(struct connection_struct *conn,
170 const char *filename,
171 SMB_STRUCT_STAT *psbuf)
172{
173 memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
174
175 /* Get the stat struct for the owner info. */
176 if (SMB_VFS_STAT(conn, filename, psbuf) != 0)
177 {
178 DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
179 strerror(errno)));
180 return -1;
181 }
182
183 return 0;
184}
185
186static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
187{
188 memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
189
190 if (fsp->is_directory || fsp->fh->fd == -1) {
191 return smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, psbuf);
192 }
193 if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
194 {
195 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
196 strerror(errno)));
197 return -1;
198 }
199
200 return 0;
201}
202
203static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *acl, /* in */
204 DOM_SID *psid_owner, /* in */
205 DOM_SID *psid_group, /* in */
206 bool is_directory, /* in */
207 SEC_ACE **ppnt_ace_list, /* out */
208 int *pgood_aces /* out */
209)
210{
211 SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)acl;
212 SMB_ACE4_INT_T *aceint;
213 SEC_ACE *nt_ace_list = NULL;
214 int good_aces = 0;
215
216 DEBUG(10, ("smbacl_nfs42win entered"));
217
218 aclint = get_validated_aclint(acl);
219 /* We do not check for naces being 0 or acl being NULL here because it is done upstream */
220 /* in smb_get_nt_acl_nfs4(). */
221 nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
222 if (nt_ace_list==NULL)
223 {
224 DEBUG(10, ("talloc error"));
225 errno = ENOMEM;
226 return False;
227 }
228
229 for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
230 SEC_ACCESS mask;
231 DOM_SID sid;
232 SMB_ACE4PROP_T *ace = &aceint->prop;
233
234 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
235 "who: %d\n", aceint->magic, ace->aceType, ace->flags,
236 ace->aceFlags, ace->aceMask, ace->who.id));
237
238 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
239
240 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
241 switch (ace->who.special_id) {
242 case SMB_ACE4_WHO_OWNER:
243 sid_copy(&sid, psid_owner);
244 break;
245 case SMB_ACE4_WHO_GROUP:
246 sid_copy(&sid, psid_group);
247 break;
248 case SMB_ACE4_WHO_EVERYONE:
249 sid_copy(&sid, &global_sid_World);
250 break;
251 default:
252 DEBUG(8, ("invalid special who id %d "
253 "ignored\n", ace->who.special_id));
254 }
255 } else {
256 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
257 gid_to_sid(&sid, ace->who.gid);
258 } else {
259 uid_to_sid(&sid, ace->who.uid);
260 }
261 }
262 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
263 sid_string_dbg(&sid)));
264
265 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
266 ace->aceMask |= SMB_ACE4_DELETE_CHILD;
267 }
268 init_sec_access(&mask, ace->aceMask);
269 init_sec_ace(&nt_ace_list[good_aces++], &sid,
270 ace->aceType, mask,
271 ace->aceFlags & 0xf);
272 }
273
274 *ppnt_ace_list = nt_ace_list;
275 *pgood_aces = good_aces;
276
277 return True;
278}
279
280static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
281 uint32 security_info,
282 SEC_DESC **ppdesc, SMB4ACL_T *acl)
283{
284 int good_aces = 0;
285 DOM_SID sid_owner, sid_group;
286 size_t sd_size = 0;
287 SEC_ACE *nt_ace_list = NULL;
288 SEC_ACL *psa = NULL;
289 TALLOC_CTX *mem_ctx = talloc_tos();
290
291 if (acl==NULL || smb_get_naces(acl)==0)
292 return NT_STATUS_ACCESS_DENIED; /* special because we
293 * shouldn't alloc 0 for
294 * win */
295
296 uid_to_sid(&sid_owner, sbuf->st_uid);
297 gid_to_sid(&sid_group, sbuf->st_gid);
298
299 if (smbacl4_nfs42win(mem_ctx, acl, &sid_owner, &sid_group, S_ISDIR(sbuf->st_mode),
300 &nt_ace_list, &good_aces)==False) {
301 DEBUG(8,("smbacl4_nfs42win failed\n"));
302 return map_nt_error_from_unix(errno);
303 }
304
305 psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
306 if (psa == NULL) {
307 DEBUG(2,("make_sec_acl failed\n"));
308 return NT_STATUS_NO_MEMORY;
309 }
310
311 DEBUG(10,("after make sec_acl\n"));
312 *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
313 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
314 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
315 NULL, psa, &sd_size);
316 if (*ppdesc==NULL) {
317 DEBUG(2,("make_sec_desc failed\n"));
318 return NT_STATUS_NO_MEMORY;
319 }
320
321 DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
322 ndr_size_security_descriptor(*ppdesc, 0)));
323
324 return NT_STATUS_OK;
325}
326
327NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
328 uint32 security_info,
329 SEC_DESC **ppdesc, SMB4ACL_T *acl)
330{
331 SMB_STRUCT_STAT sbuf;
332
333 DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
334
335 if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
336 return map_nt_error_from_unix(errno);
337 }
338
339 return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
340}
341
342NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
343 const char *name,
344 uint32 security_info,
345 SEC_DESC **ppdesc, SMB4ACL_T *acl)
346{
347 SMB_STRUCT_STAT sbuf;
348
349 DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
350
351 if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
352 return map_nt_error_from_unix(errno);
353 }
354
355 return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, acl);
356}
357
358enum smbacl4_mode_enum {e_simple=0, e_special=1};
359enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
360
361typedef struct _smbacl4_vfs_params {
362 enum smbacl4_mode_enum mode;
363 bool do_chown;
364 enum smbacl4_acedup_enum acedup;
365 struct db_context *sid_mapping_table;
366} smbacl4_vfs_params;
367
368/*
369 * Gather special parameters for NFS4 ACL handling
370 */
371static int smbacl4_get_vfs_params(
372 const char *type_name,
373 files_struct *fsp,
374 smbacl4_vfs_params *params
375)
376{
377 static const struct enum_list enum_smbacl4_modes[] = {
378 { e_simple, "simple" },
379 { e_special, "special" }
380 };
381 static const struct enum_list enum_smbacl4_acedups[] = {
382 { e_dontcare, "dontcare" },
383 { e_reject, "reject" },
384 { e_ignore, "ignore" },
385 { e_merge, "merge" },
386 };
387
388 memset(params, 0, sizeof(smbacl4_vfs_params));
389 params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
390 SNUM(fsp->conn), type_name,
391 "mode", enum_smbacl4_modes, e_simple);
392 params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
393 "chown", True);
394 params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
395 SNUM(fsp->conn), type_name,
396 "acedup", enum_smbacl4_acedups, e_dontcare);
397
398 DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
399 enum_smbacl4_modes[params->mode].name,
400 params->do_chown ? "true" : "false",
401 enum_smbacl4_acedups[params->acedup].name));
402
403 return 0;
404}
405
406static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *acl)
407{
408 SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
409 SMB_ACE4_INT_T *aceint;
410
411 DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
412
413 for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
414 SMB_ACE4PROP_T *ace = &aceint->prop;
415
416 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
417 ace->aceType,
418 ace->aceFlags, ace->flags,
419 ace->aceMask,
420 ace->who.id));
421 }
422}
423
424/*
425 * Find 2 NFS4 who-special ACE property (non-copy!!!)
426 * match nonzero if "special" and who is equal
427 * return ace if found matching; otherwise NULL
428 */
429static SMB_ACE4PROP_T *smbacl4_find_equal_special(
430 SMB4ACL_T *acl,
431 SMB_ACE4PROP_T *aceNew)
432{
433 SMB_ACL4_INT_T *aclint = get_validated_aclint(acl);
434 SMB_ACE4_INT_T *aceint;
435
436 for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
437 SMB_ACE4PROP_T *ace = &aceint->prop;
438
439 if (ace->flags == aceNew->flags &&
440 ace->aceType==aceNew->aceType &&
441 (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
442 (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
443 ) {
444 /* keep type safety; e.g. gid is an u.short */
445 if (ace->flags & SMB_ACE4_ID_SPECIAL)
446 {
447 if (ace->who.special_id==aceNew->who.special_id)
448 return ace;
449 } else {
450 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
451 {
452 if (ace->who.gid==aceNew->who.gid)
453 return ace;
454 } else {
455 if (ace->who.uid==aceNew->who.uid)
456 return ace;
457 }
458 }
459 }
460 }
461
462 return NULL;
463}
464
465static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
466 DOM_SID *dst)
467{
468 static struct db_context *mapping_db = NULL;
469 TDB_DATA data;
470
471 if (mapping_db == NULL) {
472 const char *dbname = lp_parm_const_string(
473 -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
474
475 if (dbname == NULL) {
476 DEBUG(10, ("%s:sidmap not defined\n",
477 SMBACL4_PARAM_TYPE_NAME));
478 return False;
479 }
480
481 become_root();
482 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
483 O_RDONLY, 0600);
484 unbecome_root();
485
486 if (mapping_db == NULL) {
487 DEBUG(1, ("could not open sidmap: %s\n",
488 strerror(errno)));
489 return False;
490 }
491 }
492
493 if (mapping_db->fetch(mapping_db, NULL,
494 string_term_tdb_data(sid_string_tos(src)),
495 &data) == -1) {
496 DEBUG(10, ("could not find mapping for SID %s\n",
497 sid_string_dbg(src)));
498 return False;
499 }
500
501 if ((data.dptr == NULL) || (data.dsize <= 0)
502 || (data.dptr[data.dsize-1] != '\0')) {
503 DEBUG(5, ("invalid mapping for SID %s\n",
504 sid_string_dbg(src)));
505 TALLOC_FREE(data.dptr);
506 return False;
507 }
508
509 if (!string_to_sid(dst, (char *)data.dptr)) {
510 DEBUG(1, ("invalid mapping %s for SID %s\n",
511 (char *)data.dptr, sid_string_dbg(src)));
512 TALLOC_FREE(data.dptr);
513 return False;
514 }
515
516 TALLOC_FREE(data.dptr);
517
518 return True;
519}
520
521static bool smbacl4_fill_ace4(
522 TALLOC_CTX *mem_ctx,
523 const char *filename,
524 smbacl4_vfs_params *params,
525 uid_t ownerUID,
526 gid_t ownerGID,
527 SEC_ACE *ace_nt, /* input */
528 SMB_ACE4PROP_T *ace_v4 /* output */
529)
530{
531 DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
532
533 memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
534 ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
535 ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
536 ace_v4->aceMask = ace_nt->access_mask &
537 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
538
539 se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
540
541 if (ace_v4->aceFlags!=ace_nt->flags)
542 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
543 ace_v4->aceFlags, ace_nt->flags));
544
545 if (ace_v4->aceMask!=ace_nt->access_mask)
546 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
547 ace_v4->aceMask, ace_nt->access_mask));
548
549 if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
550 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
551 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
552 } else {
553 const char *dom, *name;
554 enum lsa_SidType type;
555 uid_t uid;
556 gid_t gid;
557 DOM_SID sid;
558
559 sid_copy(&sid, &ace_nt->trustee);
560
561 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
562
563 DOM_SID mapped;
564
565 if (!nfs4_map_sid(params, &sid, &mapped)) {
566 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
567 "unknown\n", filename, sid_string_dbg(&sid)));
568 errno = EINVAL;
569 return False;
570 }
571
572 DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
573 "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
574
575 if (!lookup_sid(mem_ctx, &mapped, &dom,
576 &name, &type)) {
577 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
578 "mapped from %s is unknown\n",
579 filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
580 errno = EINVAL;
581 return False;
582 }
583
584 sid_copy(&sid, &mapped);
585 }
586
587 if (type == SID_NAME_USER) {
588 if (!sid_to_uid(&sid, &uid)) {
589 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
590 "convert %s to uid\n", filename,
591 sid_string_dbg(&sid)));
592 return False;
593 }
594
595 if (params->mode==e_special && uid==ownerUID) {
596 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
597 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
598 } else {
599 ace_v4->who.uid = uid;
600 }
601 } else { /* else group? - TODO check it... */
602 if (!sid_to_gid(&sid, &gid)) {
603 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
604 "convert %s to gid\n", filename,
605 sid_string_dbg(&sid)));
606 return False;
607 }
608
609 ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
610
611 if (params->mode==e_special && gid==ownerGID) {
612 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
613 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
614 } else {
615 ace_v4->who.gid = gid;
616 }
617 }
618 }
619
620 return True; /* OK */
621}
622
623static int smbacl4_MergeIgnoreReject(
624 enum smbacl4_acedup_enum acedup,
625 SMB4ACL_T *acl, /* may modify it */
626 SMB_ACE4PROP_T *ace, /* the "new" ACE */
627 bool *paddNewACE,
628 int i
629)
630{
631 int result = 0;
632 SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(acl, ace);
633 if (ace4found)
634 {
635 switch(acedup)
636 {
637 case e_merge: /* "merge" flags */
638 *paddNewACE = False;
639 ace4found->aceFlags |= ace->aceFlags;
640 ace4found->aceMask |= ace->aceMask;
641 break;
642 case e_ignore: /* leave out this record */
643 *paddNewACE = False;
644 break;
645 case e_reject: /* do an error */
646 DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
647 errno = EINVAL; /* SHOULD be set on any _real_ error */
648 result = -1;
649 break;
650 default:
651 break;
652 }
653 }
654 return result;
655}
656
657static SMB4ACL_T *smbacl4_win2nfs4(
658 const char *filename,
659 SEC_ACL *dacl,
660 smbacl4_vfs_params *pparams,
661 uid_t ownerUID,
662 gid_t ownerGID
663)
664{
665 SMB4ACL_T *acl;
666 uint32 i;
667 TALLOC_CTX *mem_ctx = talloc_tos();
668
669 DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
670
671 acl = smb_create_smb4acl();
672 if (acl==NULL)
673 return NULL;
674
675 for(i=0; i<dacl->num_aces; i++) {
676 SMB_ACE4PROP_T ace_v4;
677 bool addNewACE = True;
678
679 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
680 ownerUID, ownerGID,
681 dacl->aces + i, &ace_v4)) {
682 DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
683 filename,
684 sid_string_dbg(&((dacl->aces+i)->trustee))));
685 continue;
686 }
687
688 if (pparams->acedup!=e_dontcare) {
689 if (smbacl4_MergeIgnoreReject(pparams->acedup, acl,
690 &ace_v4, &addNewACE, i))
691 return NULL;
692 }
693
694 if (addNewACE)
695 smb_add_ace4(acl, &ace_v4);
696 }
697
698 return acl;
699}
700
701NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
702 uint32 security_info_sent,
703 SEC_DESC *psd,
704 set_nfs4acl_native_fn_t set_nfs4_native)
705{
706 smbacl4_vfs_params params;
707 SMB4ACL_T *acl = NULL;
708 bool result;
709
710 SMB_STRUCT_STAT sbuf;
711 bool set_acl_as_root = false;
712 uid_t newUID = (uid_t)-1;
713 gid_t newGID = (gid_t)-1;
714 int saved_errno;
715
716 DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
717
718 if ((security_info_sent & (DACL_SECURITY_INFORMATION |
719 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
720 {
721 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
722 security_info_sent));
723 return NT_STATUS_OK; /* won't show error - later to be refined... */
724 }
725
726 /* Special behaviours */
727 if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
728 return NT_STATUS_NO_MEMORY;
729
730 if (smbacl4_fGetFileOwner(fsp, &sbuf))
731 return map_nt_error_from_unix(errno);
732
733 if (params.do_chown) {
734 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
735 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
736 if (!NT_STATUS_IS_OK(status)) {
737 DEBUG(8, ("unpack_nt_owners failed"));
738 return status;
739 }
740 if (((newUID != (uid_t)-1) && (sbuf.st_uid != newUID)) ||
741 ((newGID != (gid_t)-1) && (sbuf.st_gid != newGID))) {
742 if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
743 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
744 fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID,
745 strerror(errno)));
746 return map_nt_error_from_unix(errno);
747 }
748
749 DEBUG(10,("chown %s, %u, %u succeeded.\n",
750 fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
751 if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
752 return map_nt_error_from_unix(errno);
753 /* If we successfully chowned, we know we must
754 * be able to set the acl, so do it as root.
755 */
756 set_acl_as_root = true;
757 }
758 }
759
760 if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
761 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
762 return NT_STATUS_OK;
763 }
764
765 acl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
766 if (!acl)
767 return map_nt_error_from_unix(errno);
768
769 smbacl4_dump_nfs4acl(10, acl);
770
771 if (set_acl_as_root) {
772 become_root();
773 }
774 result = set_nfs4_native(fsp, acl);
775 saved_errno = errno;
776 if (set_acl_as_root) {
777 unbecome_root();
778 }
779 if (result!=True) {
780 errno = saved_errno;
781 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
782 return map_nt_error_from_unix(errno);
783 }
784
785 DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
786 return NT_STATUS_OK;
787}
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