0941eb94f5fe5fcbd9eda683607ef00256c54670
[ira/wip.git] / source3 / modules / nfs4_acls.c
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
28 extern const struct generic_mapping file_generic_mapping;
29
30 #define SMB_ACE4_INT_MAGIC 0x76F8A967
31 typedef 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
39 typedef 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
47 static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
48 {
49         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
50         if (theacl==NULL)
51         {
52                 DEBUG(2, ("acl is NULL\n"));
53                 errno = EINVAL;
54                 return NULL;
55         }
56         if (aclint->magic!=SMB_ACL4_INT_MAGIC)
57         {
58                 DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
59                 errno = EINVAL;
60                 return NULL;
61         }
62         return aclint;
63 }
64
65 static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
66 {
67         SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
68         if (ace==NULL)
69         {
70                 DEBUG(2, ("ace is NULL\n"));
71                 errno = EINVAL;
72                 return NULL;
73         }
74         if (aceint->magic!=SMB_ACE4_INT_MAGIC)
75         {
76                 DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
77                 errno = EINVAL;
78                 return NULL;
79         }
80         return aceint;
81 }
82
83 SMB4ACL_T *smb_create_smb4acl(void)
84 {
85         TALLOC_CTX *mem_ctx = talloc_tos();
86         SMB_ACL4_INT_T  *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
87         if (theacl==NULL)
88         {
89                 DEBUG(0, ("TALLOC_SIZE failed\n"));
90                 errno = ENOMEM;
91                 return NULL;
92         }
93         theacl->magic = SMB_ACL4_INT_MAGIC;
94         /* theacl->first, last = NULL not needed */
95         return (SMB4ACL_T *)theacl;
96 }
97
98 SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
99 {
100         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
101         TALLOC_CTX *mem_ctx = talloc_tos();
102         SMB_ACE4_INT_T *ace;
103
104         ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
105         if (ace==NULL)
106         {
107                 DEBUG(0, ("TALLOC_SIZE failed\n"));
108                 errno = ENOMEM;
109                 return NULL;
110         }
111         ace->magic = SMB_ACE4_INT_MAGIC;
112         /* ace->next = NULL not needed */
113         memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
114
115         if (aclint->first==NULL)
116         {
117                 aclint->first = ace;
118                 aclint->last = ace;
119         } else {
120                 aclint->last->next = (void *)ace;
121                 aclint->last = ace;
122         }
123         aclint->naces++;
124
125         return (SMB4ACE_T *)ace;
126 }
127
128 SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
129 {
130         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
131         if (aceint==NULL)
132                 return NULL;
133
134         return &aceint->prop;
135 }
136
137 SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
138 {
139         SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
140         if (aceint==NULL)
141                 return NULL;
142
143         return (SMB4ACE_T *)aceint->next;
144 }
145
146 SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
147 {
148         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
149         if (aclint==NULL)
150                 return NULL;
151
152         return (SMB4ACE_T *)aclint->first;
153 }
154
155 uint32 smb_get_naces(SMB4ACL_T *theacl)
156 {
157         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
158         if (aclint==NULL)
159                 return 0;
160
161         return aclint->naces;
162 }
163
164 static int smbacl4_GetFileOwner(struct connection_struct *conn,
165                                 const char *filename,
166                                 SMB_STRUCT_STAT *psbuf)
167 {
168         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
169
170         /* Get the stat struct for the owner info. */
171         if (SMB_VFS_STAT(conn, filename, psbuf) != 0)
172         {
173                 DEBUG(8, ("SMB_VFS_STAT failed with error %s\n",
174                         strerror(errno)));
175                 return -1;
176         }
177
178         return 0;
179 }
180
181 static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
182 {
183         memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
184
185         if (fsp->is_directory || fsp->fh->fd == -1) {
186                 return smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, psbuf);
187         }
188         if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
189         {
190                 DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
191                         strerror(errno)));
192                 return -1;
193         }
194
195         return 0;
196 }
197
198 static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
199         DOM_SID *psid_owner, /* in */
200         DOM_SID *psid_group, /* in */
201         bool is_directory, /* in */
202         SEC_ACE **ppnt_ace_list, /* out */
203         int *pgood_aces /* out */
204 )
205 {
206         SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
207         SMB_ACE4_INT_T *aceint;
208         SEC_ACE *nt_ace_list = NULL;
209         int good_aces = 0;
210
211         DEBUG(10, ("smbacl_nfs42win entered"));
212
213         aclint = get_validated_aclint(theacl);
214         /* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
215         /* in smb_get_nt_acl_nfs4(). */
216         nt_ace_list = (SEC_ACE *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(SEC_ACE));
217         if (nt_ace_list==NULL)
218         {
219                 DEBUG(10, ("talloc error"));
220                 errno = ENOMEM;
221                 return False;
222         }
223
224         for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
225                 uint32_t mask;
226                 DOM_SID sid;
227                 SMB_ACE4PROP_T  *ace = &aceint->prop;
228
229                 DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
230                         "who: %d\n", aceint->magic, ace->aceType, ace->flags,
231                         ace->aceFlags, ace->aceMask, ace->who.id));
232
233                 SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
234
235                 if (ace->flags & SMB_ACE4_ID_SPECIAL) {
236                         switch (ace->who.special_id) {
237                         case SMB_ACE4_WHO_OWNER:
238                                 sid_copy(&sid, psid_owner);
239                                 break;
240                         case SMB_ACE4_WHO_GROUP:
241                                 sid_copy(&sid, psid_group);
242                                 break;
243                         case SMB_ACE4_WHO_EVERYONE:
244                                 sid_copy(&sid, &global_sid_World);
245                                 break;
246                         default:
247                                 DEBUG(8, ("invalid special who id %d "
248                                         "ignored\n", ace->who.special_id));
249                         }
250                 } else {
251                         if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
252                                 gid_to_sid(&sid, ace->who.gid);
253                         } else {
254                                 uid_to_sid(&sid, ace->who.uid);
255                         }
256                 }
257                 DEBUG(10, ("mapped %d to %s\n", ace->who.id,
258                            sid_string_dbg(&sid)));
259
260                 if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
261                         ace->aceMask |= SMB_ACE4_DELETE_CHILD;
262                 }
263
264                 mask = ace->aceMask;
265                 init_sec_ace(&nt_ace_list[good_aces++], &sid,
266                         ace->aceType, mask,
267                         ace->aceFlags & 0xf);
268         }
269
270         *ppnt_ace_list = nt_ace_list;
271         *pgood_aces = good_aces;
272
273         return True;
274 }
275
276 static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
277         uint32 security_info,
278         SEC_DESC **ppdesc, SMB4ACL_T *theacl)
279 {
280         int     good_aces = 0;
281         DOM_SID sid_owner, sid_group;
282         size_t sd_size = 0;
283         SEC_ACE *nt_ace_list = NULL;
284         SEC_ACL *psa = NULL;
285         TALLOC_CTX *mem_ctx = talloc_tos();
286
287         if (theacl==NULL || smb_get_naces(theacl)==0)
288                 return NT_STATUS_ACCESS_DENIED; /* special because we
289                                                  * shouldn't alloc 0 for
290                                                  * win */
291
292         uid_to_sid(&sid_owner, sbuf->st_ex_uid);
293         gid_to_sid(&sid_group, sbuf->st_ex_gid);
294
295         if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
296                              S_ISDIR(sbuf->st_ex_mode),
297                                 &nt_ace_list, &good_aces)==False) {
298                 DEBUG(8,("smbacl4_nfs42win failed\n"));
299                 return map_nt_error_from_unix(errno);
300         }
301
302         psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
303         if (psa == NULL) {
304                 DEBUG(2,("make_sec_acl failed\n"));
305                 return NT_STATUS_NO_MEMORY;
306         }
307
308         DEBUG(10,("after make sec_acl\n"));
309         *ppdesc = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE,
310                                 (security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
311                                 (security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
312                                 NULL, psa, &sd_size);
313         if (*ppdesc==NULL) {
314                 DEBUG(2,("make_sec_desc failed\n"));
315                 return NT_STATUS_NO_MEMORY;
316         }
317
318         DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
319                    (int)ndr_size_security_descriptor(*ppdesc, NULL, 0)));
320
321         return NT_STATUS_OK;
322 }
323
324 NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
325                                uint32 security_info,
326                                SEC_DESC **ppdesc, SMB4ACL_T *theacl)
327 {
328         SMB_STRUCT_STAT sbuf;
329
330         DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
331
332         if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
333                 return map_nt_error_from_unix(errno);
334         }
335
336         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
337 }
338
339 NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
340                               const char *name,
341                               uint32 security_info,
342                               SEC_DESC **ppdesc, SMB4ACL_T *theacl)
343 {
344         SMB_STRUCT_STAT sbuf;
345
346         DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
347
348         if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
349                 return map_nt_error_from_unix(errno);
350         }
351
352         return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
353 }
354
355 enum smbacl4_mode_enum {e_simple=0, e_special=1};
356 enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
357
358 typedef struct _smbacl4_vfs_params {
359         enum smbacl4_mode_enum mode;
360         bool do_chown;
361         enum smbacl4_acedup_enum acedup;
362         struct db_context *sid_mapping_table;
363 } smbacl4_vfs_params;
364
365 /*
366  * Gather special parameters for NFS4 ACL handling
367  */
368 static int smbacl4_get_vfs_params(
369         const char *type_name,
370         files_struct *fsp,
371         smbacl4_vfs_params *params
372 )
373 {
374         static const struct enum_list enum_smbacl4_modes[] = {
375                 { e_simple, "simple" },
376                 { e_special, "special" }
377         };
378         static const struct enum_list enum_smbacl4_acedups[] = {
379                 { e_dontcare, "dontcare" },
380                 { e_reject, "reject" },
381                 { e_ignore, "ignore" },
382                 { e_merge, "merge" },
383         };
384
385         memset(params, 0, sizeof(smbacl4_vfs_params));
386         params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
387                 SNUM(fsp->conn), type_name,
388                 "mode", enum_smbacl4_modes, e_simple);
389         params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
390                 "chown", True);
391         params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
392                 SNUM(fsp->conn), type_name,
393                 "acedup", enum_smbacl4_acedups, e_dontcare);
394
395         DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
396                 enum_smbacl4_modes[params->mode].name,
397                 params->do_chown ? "true" : "false",
398                 enum_smbacl4_acedups[params->acedup].name));
399
400         return 0;
401 }
402
403 static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
404 {
405         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
406         SMB_ACE4_INT_T *aceint;
407
408         DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
409
410         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
411                 SMB_ACE4PROP_T *ace = &aceint->prop;
412
413                 DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
414                         ace->aceType,
415                         ace->aceFlags, ace->flags,
416                         ace->aceMask,
417                         ace->who.id));
418         }
419 }
420
421 /* 
422  * Find 2 NFS4 who-special ACE property (non-copy!!!)
423  * match nonzero if "special" and who is equal
424  * return ace if found matching; otherwise NULL
425  */
426 static SMB_ACE4PROP_T *smbacl4_find_equal_special(
427         SMB4ACL_T *theacl,
428         SMB_ACE4PROP_T *aceNew)
429 {
430         SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
431         SMB_ACE4_INT_T *aceint;
432
433         for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
434                 SMB_ACE4PROP_T *ace = &aceint->prop;
435
436                 if (ace->flags == aceNew->flags &&
437                         ace->aceType==aceNew->aceType &&
438                         (ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
439                         (aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
440                 ) {
441                         /* keep type safety; e.g. gid is an u.short */
442                         if (ace->flags & SMB_ACE4_ID_SPECIAL)
443                         {
444                                 if (ace->who.special_id==aceNew->who.special_id)
445                                         return ace;
446                         } else {
447                                 if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
448                                 {
449                                         if (ace->who.gid==aceNew->who.gid)
450                                                 return ace;
451                                 } else {
452                                         if (ace->who.uid==aceNew->who.uid)
453                                                 return ace;
454                                 }
455                         }
456                 }
457         }
458
459         return NULL;
460 }
461
462 static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
463                          DOM_SID *dst)
464 {
465         static struct db_context *mapping_db = NULL;
466         TDB_DATA data;
467         
468         if (mapping_db == NULL) {
469                 const char *dbname = lp_parm_const_string(
470                         -1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
471                 
472                 if (dbname == NULL) {
473                         DEBUG(10, ("%s:sidmap not defined\n",
474                                    SMBACL4_PARAM_TYPE_NAME));
475                         return False;
476                 }
477                 
478                 become_root();
479                 mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
480                                      O_RDONLY, 0600);
481                 unbecome_root();
482                 
483                 if (mapping_db == NULL) {
484                         DEBUG(1, ("could not open sidmap: %s\n",
485                                   strerror(errno)));
486                         return False;
487                 }
488         }
489         
490         if (mapping_db->fetch(mapping_db, NULL,
491                               string_term_tdb_data(sid_string_tos(src)),
492                               &data) == -1) {
493                 DEBUG(10, ("could not find mapping for SID %s\n",
494                            sid_string_dbg(src)));
495                 return False;
496         }
497         
498         if ((data.dptr == NULL) || (data.dsize <= 0)
499             || (data.dptr[data.dsize-1] != '\0')) {
500                 DEBUG(5, ("invalid mapping for SID %s\n",
501                           sid_string_dbg(src)));
502                 TALLOC_FREE(data.dptr);
503                 return False;
504         }
505         
506         if (!string_to_sid(dst, (char *)data.dptr)) {
507                 DEBUG(1, ("invalid mapping %s for SID %s\n",
508                           (char *)data.dptr, sid_string_dbg(src)));
509                 TALLOC_FREE(data.dptr);
510                 return False;
511         }
512
513         TALLOC_FREE(data.dptr);
514         
515         return True;
516 }
517
518 static bool smbacl4_fill_ace4(
519         TALLOC_CTX *mem_ctx,
520         const char *filename,
521         smbacl4_vfs_params *params,
522         uid_t ownerUID,
523         gid_t ownerGID,
524         const SEC_ACE *ace_nt, /* input */
525         SMB_ACE4PROP_T *ace_v4 /* output */
526 )
527 {
528         DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
529
530         memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
531         ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
532         ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
533         ace_v4->aceMask = ace_nt->access_mask &
534                 (STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
535
536         se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
537
538         if (ace_v4->aceFlags!=ace_nt->flags)
539                 DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
540                         ace_v4->aceFlags, ace_nt->flags));
541
542         if (ace_v4->aceMask!=ace_nt->access_mask)
543                 DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
544                         ace_v4->aceMask, ace_nt->access_mask));
545
546         if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
547                 ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
548                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
549         } else {
550                 const char *dom, *name;
551                 enum lsa_SidType type;
552                 uid_t uid;
553                 gid_t gid;
554                 DOM_SID sid;
555                 
556                 sid_copy(&sid, &ace_nt->trustee);
557                 
558                 if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
559                         
560                         DOM_SID mapped;
561                         
562                         if (!nfs4_map_sid(params, &sid, &mapped)) {
563                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
564                                           "unknown\n", filename, sid_string_dbg(&sid)));
565                                 errno = EINVAL;
566                                 return False;
567                         }
568                         
569                         DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
570                                   "to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
571                         
572                         if (!lookup_sid(mem_ctx, &mapped, &dom,
573                                         &name, &type)) {
574                                 DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
575                                           "mapped from %s is unknown\n",
576                                           filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
577                                 errno = EINVAL;
578                                 return False;
579                         }
580                         
581                         sid_copy(&sid, &mapped);
582                 }
583                 
584                 if (type == SID_NAME_USER) {
585                         if (!sid_to_uid(&sid, &uid)) {
586                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
587                                           "convert %s to uid\n", filename,
588                                           sid_string_dbg(&sid)));
589                                 return False;
590                         }
591
592                         if (params->mode==e_special && uid==ownerUID) {
593                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
594                                 ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
595                         } else {
596                                 ace_v4->who.uid = uid;
597                         }
598                 } else { /* else group? - TODO check it... */
599                         if (!sid_to_gid(&sid, &gid)) {
600                                 DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
601                                           "convert %s to gid\n", filename,
602                                           sid_string_dbg(&sid)));
603                                 return False;
604                         }
605                                 
606                         ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
607
608                         if (params->mode==e_special && gid==ownerGID) {
609                                 ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
610                                 ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
611                         } else {
612                                 ace_v4->who.gid = gid;
613                         }
614                 }
615         }
616
617         return True; /* OK */
618 }
619
620 static int smbacl4_MergeIgnoreReject(
621         enum smbacl4_acedup_enum acedup,
622         SMB4ACL_T *theacl, /* may modify it */
623         SMB_ACE4PROP_T *ace, /* the "new" ACE */
624         bool    *paddNewACE,
625         int     i
626 )
627 {
628         int     result = 0;
629         SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
630         if (ace4found)
631         {
632                 switch(acedup)
633                 {
634                 case e_merge: /* "merge" flags */
635                         *paddNewACE = False;
636                         ace4found->aceFlags |= ace->aceFlags;
637                         ace4found->aceMask |= ace->aceMask;
638                         break;
639                 case e_ignore: /* leave out this record */
640                         *paddNewACE = False;
641                         break;
642                 case e_reject: /* do an error */
643                         DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
644                         errno = EINVAL; /* SHOULD be set on any _real_ error */
645                         result = -1;
646                         break;
647                 default:
648                         break;
649                 }
650         }
651         return result;
652 }
653
654 static SMB4ACL_T *smbacl4_win2nfs4(
655         const char *filename,
656         const SEC_ACL *dacl,
657         smbacl4_vfs_params *pparams,
658         uid_t ownerUID,
659         gid_t ownerGID
660 )
661 {
662         SMB4ACL_T *theacl;
663         uint32  i;
664         TALLOC_CTX *mem_ctx = talloc_tos();
665
666         DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
667
668         theacl = smb_create_smb4acl();
669         if (theacl==NULL)
670                 return NULL;
671
672         for(i=0; i<dacl->num_aces; i++) {
673                 SMB_ACE4PROP_T  ace_v4;
674                 bool    addNewACE = True;
675
676                 if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
677                                        ownerUID, ownerGID,
678                                        dacl->aces + i, &ace_v4)) {
679                         DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
680                                   filename,
681                                   sid_string_dbg(&((dacl->aces+i)->trustee))));
682                         continue;
683                 }
684
685                 if (pparams->acedup!=e_dontcare) {
686                         if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
687                                 &ace_v4, &addNewACE, i))
688                                 return NULL;
689                 }
690
691                 if (addNewACE)
692                         smb_add_ace4(theacl, &ace_v4);
693         }
694
695         return theacl;
696 }
697
698 NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
699         uint32 security_info_sent,
700         const SEC_DESC *psd,
701         set_nfs4acl_native_fn_t set_nfs4_native)
702 {
703         smbacl4_vfs_params params;
704         SMB4ACL_T *theacl = NULL;
705         bool    result;
706
707         SMB_STRUCT_STAT sbuf;
708         bool set_acl_as_root = false;
709         uid_t newUID = (uid_t)-1;
710         gid_t newGID = (gid_t)-1;
711         int saved_errno;
712
713         DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp->fsp_name));
714
715         if ((security_info_sent & (DACL_SECURITY_INFORMATION |
716                 GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
717         {
718                 DEBUG(9, ("security_info_sent (0x%x) ignored\n",
719                         security_info_sent));
720                 return NT_STATUS_OK; /* won't show error - later to be refined... */
721         }
722
723         /* Special behaviours */
724         if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, &params))
725                 return NT_STATUS_NO_MEMORY;
726
727         if (smbacl4_fGetFileOwner(fsp, &sbuf))
728                 return map_nt_error_from_unix(errno);
729
730         if (params.do_chown) {
731                 /* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
732                 NTSTATUS status = unpack_nt_owners(SNUM(fsp->conn), &newUID, &newGID, security_info_sent, psd);
733                 if (!NT_STATUS_IS_OK(status)) {
734                         DEBUG(8, ("unpack_nt_owners failed"));
735                         return status;
736                 }
737                 if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
738                     ((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
739                         if(try_chown(fsp->conn, fsp->fsp_name, newUID, newGID)) {
740                                 DEBUG(3,("chown %s, %u, %u failed. Error = %s.\n",
741                                          fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID, 
742                                          strerror(errno)));
743                                 return map_nt_error_from_unix(errno);
744                         }
745
746                         DEBUG(10,("chown %s, %u, %u succeeded.\n",
747                                   fsp->fsp_name, (unsigned int)newUID, (unsigned int)newGID));
748                         if (smbacl4_GetFileOwner(fsp->conn, fsp->fsp_name, &sbuf))
749                                 return map_nt_error_from_unix(errno);
750
751                         /* If we successfully chowned, we know we must
752                          * be able to set the acl, so do it as root.
753                          */
754                         set_acl_as_root = true;
755                 }
756         }
757
758         if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
759                 DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
760                 return NT_STATUS_OK;
761         }
762
763         theacl = smbacl4_win2nfs4(fsp->fsp_name, psd->dacl, &params, sbuf.st_uid, sbuf.st_gid);
764         if (!theacl)
765                 return map_nt_error_from_unix(errno);
766
767         smbacl4_dump_nfs4acl(10, theacl);
768
769         if (set_acl_as_root) {
770                 become_root();
771         }
772         result = set_nfs4_native(fsp, theacl);
773         saved_errno = errno;
774         if (set_acl_as_root) {
775                 unbecome_root();
776         }
777         if (result!=True) {
778                 errno = saved_errno;
779                 DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
780                 return map_nt_error_from_unix(errno);
781         }
782
783         DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
784         return NT_STATUS_OK;
785 }