s3: Remove an unused parameter from check_parent_access()
[kai/samba.git] / source3 / smbd / open.c
1 /* 
2    Unix SMB/CIFS implementation.
3    file opening and share modes
4    Copyright (C) Andrew Tridgell 1992-1998
5    Copyright (C) Jeremy Allison 2001-2004
6    Copyright (C) Volker Lendecke 2005
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 3 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37         bool delayed_for_oplocks;
38         struct file_id id;
39 };
40
41 /****************************************************************************
42  If the requester wanted DELETE_ACCESS and was rejected because
43  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44  overrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48                                         const struct smb_filename *smb_fname,
49                                         uint32_t access_mask,
50                                         uint32_t rejected_mask)
51 {
52         if ((access_mask & DELETE_ACCESS) &&
53                     (rejected_mask & DELETE_ACCESS) &&
54                     can_delete_file_in_directory(conn, smb_fname)) {
55                 return true;
56         }
57         return false;
58 }
59
60 /****************************************************************************
61  Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65                                 const struct smb_filename *smb_fname,
66                                 uint32_t access_mask)
67 {
68         /* Check if we have rights to open. */
69         NTSTATUS status;
70         struct security_descriptor *sd = NULL;
71         uint32_t rejected_share_access;
72         uint32_t rejected_mask = access_mask;
73
74         rejected_share_access = access_mask & ~(conn->share_access);
75
76         if (rejected_share_access) {
77                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78                         "on %s (0x%x)\n",
79                         (unsigned int)access_mask,
80                         smb_fname_str_dbg(smb_fname),
81                         (unsigned int)rejected_share_access ));
82                 return NT_STATUS_ACCESS_DENIED;
83         }
84
85         if (get_current_uid(conn) == (uid_t)0) {
86                 /* I'm sorry sir, I didn't know you were root... */
87                 DEBUG(10,("smbd_check_access_rights: root override "
88                         "on %s. Granting 0x%x\n",
89                         smb_fname_str_dbg(smb_fname),
90                         (unsigned int)access_mask ));
91                 return NT_STATUS_OK;
92         }
93
94         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97                         smb_fname_str_dbg(smb_fname),
98                         (unsigned int)access_mask ));
99                 return NT_STATUS_OK;
100         }
101
102         if (access_mask == DELETE_ACCESS &&
103                         VALID_STAT(smb_fname->st) &&
104                         S_ISLNK(smb_fname->st.st_ex_mode)) {
105                 /* We can always delete a symlink. */
106                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107                         "on DELETE_ACCESS on symlink %s.\n",
108                         smb_fname_str_dbg(smb_fname) ));
109                 return NT_STATUS_OK;
110         }
111
112         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113                         (SECINFO_OWNER |
114                         SECINFO_GROUP |
115                         SECINFO_DACL),&sd);
116
117         if (!NT_STATUS_IS_OK(status)) {
118                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119                         "on %s: %s\n",
120                         smb_fname_str_dbg(smb_fname),
121                         nt_errstr(status)));
122
123                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124                         goto access_denied;
125                 }
126
127                 return status;
128         }
129
130         /*
131          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132          * owner WRITE_DAC and READ_CONTROL.
133          */
134         status = se_access_check(sd,
135                                 get_current_nttok(conn),
136                                 (access_mask & ~FILE_READ_ATTRIBUTES),
137                                 &rejected_mask);
138
139         DEBUG(10,("smbd_check_access_rights: file %s requesting "
140                 "0x%x returning 0x%x (%s)\n",
141                 smb_fname_str_dbg(smb_fname),
142                 (unsigned int)access_mask,
143                 (unsigned int)rejected_mask,
144                 nt_errstr(status) ));
145
146         if (!NT_STATUS_IS_OK(status)) {
147                 if (DEBUGLEVEL >= 10) {
148                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149                                 smb_fname_str_dbg(smb_fname) ));
150                         NDR_PRINT_DEBUG(security_descriptor, sd);
151                 }
152         }
153
154         TALLOC_FREE(sd);
155
156         if (NT_STATUS_IS_OK(status) ||
157                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158                 return status;
159         }
160
161         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163   access_denied:
164
165         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167                         !lp_store_dos_attributes(SNUM(conn)) &&
168                         (lp_map_readonly(SNUM(conn)) ||
169                         lp_map_archive(SNUM(conn)) ||
170                         lp_map_hidden(SNUM(conn)) ||
171                         lp_map_system(SNUM(conn)))) {
172                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
173
174                 DEBUG(10,("smbd_check_access_rights: "
175                         "overrode "
176                         "FILE_WRITE_ATTRIBUTES "
177                         "on file %s\n",
178                         smb_fname_str_dbg(smb_fname)));
179         }
180
181         if (parent_override_delete(conn,
182                                 smb_fname,
183                                 access_mask,
184                                 rejected_mask)) {
185                 /* Were we trying to do an open
186                  * for delete and didn't get DELETE
187                  * access (only) ? Check if the
188                  * directory allows DELETE_CHILD.
189                  * See here:
190                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
191                  * for details. */
192
193                 rejected_mask &= ~DELETE_ACCESS;
194
195                 DEBUG(10,("smbd_check_access_rights: "
196                         "overrode "
197                         "DELETE_ACCESS on "
198                         "file %s\n",
199                         smb_fname_str_dbg(smb_fname)));
200         }
201
202         if (rejected_mask != 0) {
203                 return NT_STATUS_ACCESS_DENIED;
204         }
205         return NT_STATUS_OK;
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209                                 struct smb_filename *smb_fname,
210                                 uint32_t access_mask)
211 {
212         NTSTATUS status;
213         char *parent_dir = NULL;
214         struct security_descriptor *parent_sd = NULL;
215         uint32_t access_granted = 0;
216
217         if (!parent_dirname(talloc_tos(),
218                                 smb_fname->base_name,
219                                 &parent_dir,
220                                 NULL)) {
221                 return NT_STATUS_NO_MEMORY;
222         }
223
224         if (get_current_uid(conn) == (uid_t)0) {
225                 /* I'm sorry sir, I didn't know you were root... */
226                 DEBUG(10,("check_parent_access: root override "
227                         "on %s. Granting 0x%x\n",
228                         smb_fname_str_dbg(smb_fname),
229                         (unsigned int)access_mask ));
230                 return NT_STATUS_OK;
231         }
232
233         status = SMB_VFS_GET_NT_ACL(conn,
234                                 parent_dir,
235                                 SECINFO_DACL,
236                                 &parent_sd);
237
238         if (!NT_STATUS_IS_OK(status)) {
239                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
240                         "%s with error %s\n",
241                         parent_dir,
242                         nt_errstr(status)));
243                 return status;
244         }
245
246         /*
247          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
248          * owner WRITE_DAC and READ_CONTROL.
249          */
250         status = se_access_check(parent_sd,
251                                 get_current_nttok(conn),
252                                 (access_mask & ~FILE_READ_ATTRIBUTES),
253                                 &access_granted);
254         if(!NT_STATUS_IS_OK(status)) {
255                 DEBUG(5,("check_parent_access: access check "
256                         "on directory %s for "
257                         "path %s for mask 0x%x returned (0x%x) %s\n",
258                         parent_dir,
259                         smb_fname->base_name,
260                         access_mask,
261                         access_granted,
262                         nt_errstr(status) ));
263                 return status;
264         }
265
266         return NT_STATUS_OK;
267 }
268
269 /****************************************************************************
270  fd support routines - attempt to do a dos_open.
271 ****************************************************************************/
272
273 static NTSTATUS fd_open(struct connection_struct *conn,
274                     files_struct *fsp,
275                     int flags,
276                     mode_t mode)
277 {
278         struct smb_filename *smb_fname = fsp->fsp_name;
279         NTSTATUS status = NT_STATUS_OK;
280
281 #ifdef O_NOFOLLOW
282         /* 
283          * Never follow symlinks on a POSIX client. The
284          * client should be doing this.
285          */
286
287         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
288                 flags |= O_NOFOLLOW;
289         }
290 #endif
291
292         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
293         if (fsp->fh->fd == -1) {
294                 status = map_nt_error_from_unix(errno);
295                 if (errno == EMFILE) {
296                         static time_t last_warned = 0L;
297
298                         if (time((time_t *) NULL) > last_warned) {
299                                 DEBUG(0,("Too many open files, unable "
300                                         "to open more!  smbd's max "
301                                         "open files = %d\n",
302                                         lp_max_open_files()));
303                                 last_warned = time((time_t *) NULL);
304                         }
305                 }
306
307         }
308
309         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
310                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
311                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
312
313         return status;
314 }
315
316 /****************************************************************************
317  Close the file associated with a fsp.
318 ****************************************************************************/
319
320 NTSTATUS fd_close(files_struct *fsp)
321 {
322         int ret;
323
324         if (fsp->dptr) {
325                 dptr_CloseDir(fsp);
326         }
327         if (fsp->fh->fd == -1) {
328                 return NT_STATUS_OK; /* What we used to call a stat open. */
329         }
330         if (fsp->fh->ref_count > 1) {
331                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
332         }
333
334         ret = SMB_VFS_CLOSE(fsp);
335         fsp->fh->fd = -1;
336         if (ret == -1) {
337                 return map_nt_error_from_unix(errno);
338         }
339         return NT_STATUS_OK;
340 }
341
342 /****************************************************************************
343  Change the ownership of a file to that of the parent directory.
344  Do this by fd if possible.
345 ****************************************************************************/
346
347 void change_file_owner_to_parent(connection_struct *conn,
348                                         const char *inherit_from_dir,
349                                         files_struct *fsp)
350 {
351         struct smb_filename *smb_fname_parent = NULL;
352         NTSTATUS status;
353         int ret;
354
355         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
356                                             NULL, NULL, &smb_fname_parent);
357         if (!NT_STATUS_IS_OK(status)) {
358                 return;
359         }
360
361         ret = SMB_VFS_STAT(conn, smb_fname_parent);
362         if (ret == -1) {
363                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
364                          "directory %s. Error was %s\n",
365                          smb_fname_str_dbg(smb_fname_parent),
366                          strerror(errno)));
367                 TALLOC_FREE(smb_fname_parent);
368                 return;
369         }
370
371         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
372                 /* Already this uid - no need to change. */
373                 DEBUG(10,("change_file_owner_to_parent: file %s "
374                         "is already owned by uid %d\n",
375                         fsp_str_dbg(fsp),
376                         (int)fsp->fsp_name->st.st_ex_uid ));
377                 TALLOC_FREE(smb_fname_parent);
378                 return;
379         }
380
381         become_root();
382         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
383         unbecome_root();
384         if (ret == -1) {
385                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
386                          "file %s to parent directory uid %u. Error "
387                          "was %s\n", fsp_str_dbg(fsp),
388                          (unsigned int)smb_fname_parent->st.st_ex_uid,
389                          strerror(errno) ));
390         } else {
391                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
392                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
393                         (unsigned int)smb_fname_parent->st.st_ex_uid));
394                 /* Ensure the uid entry is updated. */
395                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
396         }
397
398         TALLOC_FREE(smb_fname_parent);
399 }
400
401 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
402                                        const char *inherit_from_dir,
403                                        const char *fname,
404                                        SMB_STRUCT_STAT *psbuf)
405 {
406         struct smb_filename *smb_fname_parent = NULL;
407         struct smb_filename *smb_fname_cwd = NULL;
408         char *saved_dir = NULL;
409         TALLOC_CTX *ctx = talloc_tos();
410         NTSTATUS status = NT_STATUS_OK;
411         int ret;
412
413         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
414                                             &smb_fname_parent);
415         if (!NT_STATUS_IS_OK(status)) {
416                 return status;
417         }
418
419         ret = SMB_VFS_STAT(conn, smb_fname_parent);
420         if (ret == -1) {
421                 status = map_nt_error_from_unix(errno);
422                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
423                          "directory %s. Error was %s\n",
424                          smb_fname_str_dbg(smb_fname_parent),
425                          strerror(errno)));
426                 goto out;
427         }
428
429         /* We've already done an lstat into psbuf, and we know it's a
430            directory. If we can cd into the directory and the dev/ino
431            are the same then we can safely chown without races as
432            we're locking the directory in place by being in it.  This
433            should work on any UNIX (thanks tridge :-). JRA.
434         */
435
436         saved_dir = vfs_GetWd(ctx,conn);
437         if (!saved_dir) {
438                 status = map_nt_error_from_unix(errno);
439                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
440                          "current working directory. Error was %s\n",
441                          strerror(errno)));
442                 goto out;
443         }
444
445         /* Chdir into the new path. */
446         if (vfs_ChDir(conn, fname) == -1) {
447                 status = map_nt_error_from_unix(errno);
448                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
449                          "current working directory to %s. Error "
450                          "was %s\n", fname, strerror(errno) ));
451                 goto chdir;
452         }
453
454         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
455                                             &smb_fname_cwd);
456         if (!NT_STATUS_IS_OK(status)) {
457                 return status;
458         }
459
460         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
461         if (ret == -1) {
462                 status = map_nt_error_from_unix(errno);
463                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
464                          "directory '.' (%s) Error was %s\n",
465                          fname, strerror(errno)));
466                 goto chdir;
467         }
468
469         /* Ensure we're pointing at the same place. */
470         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
471             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
472                 DEBUG(0,("change_dir_owner_to_parent: "
473                          "device/inode on directory %s changed. "
474                          "Refusing to chown !\n", fname ));
475                 status = NT_STATUS_ACCESS_DENIED;
476                 goto chdir;
477         }
478
479         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
480                 /* Already this uid - no need to change. */
481                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
482                         "is already owned by uid %d\n",
483                         fname,
484                         (int)smb_fname_cwd->st.st_ex_uid ));
485                 status = NT_STATUS_OK;
486                 goto chdir;
487         }
488
489         become_root();
490         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
491                             (gid_t)-1);
492         unbecome_root();
493         if (ret == -1) {
494                 status = map_nt_error_from_unix(errno);
495                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
496                           "directory %s to parent directory uid %u. "
497                           "Error was %s\n", fname,
498                           (unsigned int)smb_fname_parent->st.st_ex_uid,
499                           strerror(errno) ));
500         } else {
501                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
502                         "directory %s to parent directory uid %u.\n",
503                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
504                 /* Ensure the uid entry is updated. */
505                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
506         }
507
508  chdir:
509         vfs_ChDir(conn,saved_dir);
510  out:
511         TALLOC_FREE(smb_fname_parent);
512         TALLOC_FREE(smb_fname_cwd);
513         return status;
514 }
515
516 /****************************************************************************
517  Open a file.
518 ****************************************************************************/
519
520 static NTSTATUS open_file(files_struct *fsp,
521                           connection_struct *conn,
522                           struct smb_request *req,
523                           const char *parent_dir,
524                           int flags,
525                           mode_t unx_mode,
526                           uint32 access_mask, /* client requested access mask. */
527                           uint32 open_access_mask) /* what we're actually using in the open. */
528 {
529         struct smb_filename *smb_fname = fsp->fsp_name;
530         NTSTATUS status = NT_STATUS_OK;
531         int accmode = (flags & O_ACCMODE);
532         int local_flags = flags;
533         bool file_existed = VALID_STAT(fsp->fsp_name->st);
534         bool file_created = false;
535
536         fsp->fh->fd = -1;
537         errno = EPERM;
538
539         /* Check permissions */
540
541         /*
542          * This code was changed after seeing a client open request 
543          * containing the open mode of (DENY_WRITE/read-only) with
544          * the 'create if not exist' bit set. The previous code
545          * would fail to open the file read only on a read-only share
546          * as it was checking the flags parameter  directly against O_RDONLY,
547          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
548          * JRA.
549          */
550
551         if (!CAN_WRITE(conn)) {
552                 /* It's a read-only share - fail if we wanted to write. */
553                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
554                         DEBUG(3,("Permission denied opening %s\n",
555                                  smb_fname_str_dbg(smb_fname)));
556                         return NT_STATUS_ACCESS_DENIED;
557                 } else if(flags & O_CREAT) {
558                         /* We don't want to write - but we must make sure that
559                            O_CREAT doesn't create the file if we have write
560                            access into the directory.
561                         */
562                         flags &= ~(O_CREAT|O_EXCL);
563                         local_flags &= ~(O_CREAT|O_EXCL);
564                 }
565         }
566
567         /*
568          * This little piece of insanity is inspired by the
569          * fact that an NT client can open a file for O_RDONLY,
570          * but set the create disposition to FILE_EXISTS_TRUNCATE.
571          * If the client *can* write to the file, then it expects to
572          * truncate the file, even though it is opening for readonly.
573          * Quicken uses this stupid trick in backup file creation...
574          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
575          * for helping track this one down. It didn't bite us in 2.0.x
576          * as we always opened files read-write in that release. JRA.
577          */
578
579         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
580                 DEBUG(10,("open_file: truncate requested on read-only open "
581                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
582                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
583         }
584
585         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
586             (!file_existed && (local_flags & O_CREAT)) ||
587             ((local_flags & O_TRUNC) == O_TRUNC) ) {
588                 const char *wild;
589
590                 /*
591                  * We can't actually truncate here as the file may be locked.
592                  * open_file_ntcreate will take care of the truncate later. JRA.
593                  */
594
595                 local_flags &= ~O_TRUNC;
596
597 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
598                 /*
599                  * We would block on opening a FIFO with no one else on the
600                  * other end. Do what we used to do and add O_NONBLOCK to the
601                  * open flags. JRA.
602                  */
603
604                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
605                         local_flags |= O_NONBLOCK;
606                 }
607 #endif
608
609                 /* Don't create files with Microsoft wildcard characters. */
610                 if (fsp->base_fsp) {
611                         /*
612                          * wildcard characters are allowed in stream names
613                          * only test the basefilename
614                          */
615                         wild = fsp->base_fsp->fsp_name->base_name;
616                 } else {
617                         wild = smb_fname->base_name;
618                 }
619                 if ((local_flags & O_CREAT) && !file_existed &&
620                     ms_has_wild(wild))  {
621                         return NT_STATUS_OBJECT_NAME_INVALID;
622                 }
623
624                 /* Can we access this file ? */
625                 if (!fsp->base_fsp) {
626                         /* Only do this check on non-stream open. */
627                         if (file_existed) {
628                                 status = smbd_check_access_rights(conn,
629                                                 smb_fname,
630                                                 access_mask);
631                         } else if (local_flags & O_CREAT){
632                                 status = check_parent_access(conn,
633                                                 smb_fname,
634                                                 SEC_DIR_ADD_FILE);
635                         } else {
636                                 /* File didn't exist and no O_CREAT. */
637                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
638                         }
639                         if (!NT_STATUS_IS_OK(status)) {
640                                 DEBUG(10,("open_file: "
641                                         "%s on file "
642                                         "%s returned %s\n",
643                                         file_existed ?
644                                                 "smbd_check_access_rights" :
645                                                 "check_parent_access",
646                                         smb_fname_str_dbg(smb_fname),
647                                         nt_errstr(status) ));
648                                 return status;
649                         }
650                 }
651
652                 /* Actually do the open */
653                 status = fd_open(conn, fsp, local_flags, unx_mode);
654                 if (!NT_STATUS_IS_OK(status)) {
655                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
656                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
657                                  nt_errstr(status),local_flags,flags));
658                         return status;
659                 }
660
661                 if ((local_flags & O_CREAT) && !file_existed) {
662                         file_created = true;
663                 }
664
665         } else {
666                 fsp->fh->fd = -1; /* What we used to call a stat open. */
667                 if (!file_existed) {
668                         /* File must exist for a stat open. */
669                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
670                 }
671
672                 status = smbd_check_access_rights(conn,
673                                 smb_fname,
674                                 access_mask);
675
676                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
677                                 fsp->posix_open &&
678                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
679                         /* This is a POSIX stat open for delete
680                          * or rename on a symlink that points
681                          * nowhere. Allow. */
682                         DEBUG(10,("open_file: allowing POSIX "
683                                   "open on bad symlink %s\n",
684                                   smb_fname_str_dbg(smb_fname)));
685                         status = NT_STATUS_OK;
686                 }
687
688                 if (!NT_STATUS_IS_OK(status)) {
689                         DEBUG(10,("open_file: "
690                                 "smbd_check_access_rights on file "
691                                 "%s returned %s\n",
692                                 smb_fname_str_dbg(smb_fname),
693                                 nt_errstr(status) ));
694                         return status;
695                 }
696         }
697
698         if (!file_existed) {
699                 int ret;
700
701                 if (fsp->fh->fd == -1) {
702                         ret = SMB_VFS_STAT(conn, smb_fname);
703                 } else {
704                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
705                         /* If we have an fd, this stat should succeed. */
706                         if (ret == -1) {
707                                 DEBUG(0,("Error doing fstat on open file %s "
708                                          "(%s)\n",
709                                          smb_fname_str_dbg(smb_fname),
710                                          strerror(errno) ));
711                         }
712                 }
713
714                 /* For a non-io open, this stat failing means file not found. JRA */
715                 if (ret == -1) {
716                         status = map_nt_error_from_unix(errno);
717                         fd_close(fsp);
718                         return status;
719                 }
720
721                 if (file_created) {
722                         bool need_re_stat = false;
723                         /* Do all inheritance work after we've
724                            done a successful stat call and filled
725                            in the stat struct in fsp->fsp_name. */
726
727                         /* Inherit the ACL if required */
728                         if (lp_inherit_perms(SNUM(conn))) {
729                                 inherit_access_posix_acl(conn, parent_dir,
730                                                          smb_fname->base_name,
731                                                          unx_mode);
732                                 need_re_stat = true;
733                         }
734
735                         /* Change the owner if required. */
736                         if (lp_inherit_owner(SNUM(conn))) {
737                                 change_file_owner_to_parent(conn, parent_dir,
738                                                             fsp);
739                                 need_re_stat = true;
740                         }
741
742                         if (need_re_stat) {
743                                 if (fsp->fh->fd == -1) {
744                                         ret = SMB_VFS_STAT(conn, smb_fname);
745                                 } else {
746                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
747                                         /* If we have an fd, this stat should succeed. */
748                                         if (ret == -1) {
749                                                 DEBUG(0,("Error doing fstat on open file %s "
750                                                          "(%s)\n",
751                                                          smb_fname_str_dbg(smb_fname),
752                                                          strerror(errno) ));
753                                         }
754                                 }
755                         }
756
757                         notify_fname(conn, NOTIFY_ACTION_ADDED,
758                                      FILE_NOTIFY_CHANGE_FILE_NAME,
759                                      smb_fname->base_name);
760                 }
761         }
762
763         /*
764          * POSIX allows read-only opens of directories. We don't
765          * want to do this (we use a different code path for this)
766          * so catch a directory open and return an EISDIR. JRA.
767          */
768
769         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
770                 fd_close(fsp);
771                 errno = EISDIR;
772                 return NT_STATUS_FILE_IS_A_DIRECTORY;
773         }
774
775         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
776         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
777         fsp->file_pid = req ? req->smbpid : 0;
778         fsp->can_lock = True;
779         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
780         if (!CAN_WRITE(conn)) {
781                 fsp->can_write = False;
782         } else {
783                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
784                         True : False;
785         }
786         fsp->print_file = NULL;
787         fsp->modified = False;
788         fsp->sent_oplock_break = NO_BREAK_SENT;
789         fsp->is_directory = False;
790         if (conn->aio_write_behind_list &&
791             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
792                        conn->case_sensitive)) {
793                 fsp->aio_write_behind = True;
794         }
795
796         fsp->wcp = NULL; /* Write cache pointer. */
797
798         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
799                  conn->session_info->unix_info->unix_name,
800                  smb_fname_str_dbg(smb_fname),
801                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
802                  conn->num_files_open));
803
804         errno = 0;
805         return NT_STATUS_OK;
806 }
807
808 /****************************************************************************
809  Check if we can open a file with a share mode.
810  Returns True if conflict, False if not.
811 ****************************************************************************/
812
813 static bool share_conflict(struct share_mode_entry *entry,
814                            uint32 access_mask,
815                            uint32 share_access)
816 {
817         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
818                   "entry->share_access = 0x%x, "
819                   "entry->private_options = 0x%x\n",
820                   (unsigned int)entry->access_mask,
821                   (unsigned int)entry->share_access,
822                   (unsigned int)entry->private_options));
823
824         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
825                   (unsigned int)access_mask, (unsigned int)share_access));
826
827         if ((entry->access_mask & (FILE_WRITE_DATA|
828                                    FILE_APPEND_DATA|
829                                    FILE_READ_DATA|
830                                    FILE_EXECUTE|
831                                    DELETE_ACCESS)) == 0) {
832                 DEBUG(10,("share_conflict: No conflict due to "
833                           "entry->access_mask = 0x%x\n",
834                           (unsigned int)entry->access_mask ));
835                 return False;
836         }
837
838         if ((access_mask & (FILE_WRITE_DATA|
839                             FILE_APPEND_DATA|
840                             FILE_READ_DATA|
841                             FILE_EXECUTE|
842                             DELETE_ACCESS)) == 0) {
843                 DEBUG(10,("share_conflict: No conflict due to "
844                           "access_mask = 0x%x\n",
845                           (unsigned int)access_mask ));
846                 return False;
847         }
848
849 #if 1 /* JRA TEST - Superdebug. */
850 #define CHECK_MASK(num, am, right, sa, share) \
851         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
852                 (unsigned int)(num), (unsigned int)(am), \
853                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
854         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
855                 (unsigned int)(num), (unsigned int)(sa), \
856                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
857         if (((am) & (right)) && !((sa) & (share))) { \
858                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
859 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
860                         (unsigned int)(share) )); \
861                 return True; \
862         }
863 #else
864 #define CHECK_MASK(num, am, right, sa, share) \
865         if (((am) & (right)) && !((sa) & (share))) { \
866                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
867 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
868                         (unsigned int)(share) )); \
869                 return True; \
870         }
871 #endif
872
873         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
874                    share_access, FILE_SHARE_WRITE);
875         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
876                    entry->share_access, FILE_SHARE_WRITE);
877
878         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
879                    share_access, FILE_SHARE_READ);
880         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
881                    entry->share_access, FILE_SHARE_READ);
882
883         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
884                    share_access, FILE_SHARE_DELETE);
885         CHECK_MASK(6, access_mask, DELETE_ACCESS,
886                    entry->share_access, FILE_SHARE_DELETE);
887
888         DEBUG(10,("share_conflict: No conflict.\n"));
889         return False;
890 }
891
892 #if defined(DEVELOPER)
893 static void validate_my_share_entries(struct smbd_server_connection *sconn,
894                                       int num,
895                                       struct share_mode_entry *share_entry)
896 {
897         files_struct *fsp;
898
899         if (!procid_is_me(&share_entry->pid)) {
900                 return;
901         }
902
903         if (is_deferred_open_entry(share_entry) &&
904             !open_was_deferred(sconn, share_entry->op_mid)) {
905                 char *str = talloc_asprintf(talloc_tos(),
906                         "Got a deferred entry without a request: "
907                         "PANIC: %s\n",
908                         share_mode_str(talloc_tos(), num, share_entry));
909                 smb_panic(str);
910         }
911
912         if (!is_valid_share_mode_entry(share_entry)) {
913                 return;
914         }
915
916         fsp = file_find_dif(sconn, share_entry->id,
917                             share_entry->share_file_id);
918         if (!fsp) {
919                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
920                          share_mode_str(talloc_tos(), num, share_entry) ));
921                 smb_panic("validate_my_share_entries: Cannot match a "
922                           "share entry with an open file\n");
923         }
924
925         if (is_deferred_open_entry(share_entry)) {
926                 goto panic;
927         }
928
929         if ((share_entry->op_type == NO_OPLOCK) &&
930             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
931                 /* Someone has already written to it, but I haven't yet
932                  * noticed */
933                 return;
934         }
935
936         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
937                 goto panic;
938         }
939
940         return;
941
942  panic:
943         {
944                 char *str;
945                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
946                          share_mode_str(talloc_tos(), num, share_entry) ));
947                 str = talloc_asprintf(talloc_tos(),
948                         "validate_my_share_entries: "
949                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
950                          fsp->fsp_name->base_name,
951                          (unsigned int)fsp->oplock_type,
952                          (unsigned int)share_entry->op_type );
953                 smb_panic(str);
954         }
955 }
956 #endif
957
958 bool is_stat_open(uint32 access_mask)
959 {
960         return (access_mask &&
961                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
962                                   FILE_WRITE_ATTRIBUTES))==0) &&
963                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
964                                  FILE_WRITE_ATTRIBUTES)) != 0));
965 }
966
967 /****************************************************************************
968  Deal with share modes
969  Invarient: Share mode must be locked on entry and exit.
970  Returns -1 on error, or number of share modes on success (may be zero).
971 ****************************************************************************/
972
973 static NTSTATUS open_mode_check(connection_struct *conn,
974                                 struct share_mode_lock *lck,
975                                 uint32_t name_hash,
976                                 uint32 access_mask,
977                                 uint32 share_access,
978                                 uint32 create_options,
979                                 bool *file_existed)
980 {
981         int i;
982
983         if(lck->data->num_share_modes == 0) {
984                 return NT_STATUS_OK;
985         }
986
987         *file_existed = True;
988
989         /* A delete on close prohibits everything */
990
991         if (is_delete_on_close_set(lck, name_hash)) {
992                 return NT_STATUS_DELETE_PENDING;
993         }
994
995         if (is_stat_open(access_mask)) {
996                 /* Stat open that doesn't trigger oplock breaks or share mode
997                  * checks... ! JRA. */
998                 return NT_STATUS_OK;
999         }
1000
1001         /*
1002          * Check if the share modes will give us access.
1003          */
1004
1005 #if defined(DEVELOPER)
1006         for(i = 0; i < lck->data->num_share_modes; i++) {
1007                 validate_my_share_entries(conn->sconn, i,
1008                                           &lck->data->share_modes[i]);
1009         }
1010 #endif
1011
1012         if (!lp_share_modes(SNUM(conn))) {
1013                 return NT_STATUS_OK;
1014         }
1015
1016         /* Now we check the share modes, after any oplock breaks. */
1017         for(i = 0; i < lck->data->num_share_modes; i++) {
1018
1019                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1020                         continue;
1021                 }
1022
1023                 /* someone else has a share lock on it, check to see if we can
1024                  * too */
1025                 if (share_conflict(&lck->data->share_modes[i],
1026                                    access_mask, share_access)) {
1027                         return NT_STATUS_SHARING_VIOLATION;
1028                 }
1029         }
1030
1031         return NT_STATUS_OK;
1032 }
1033
1034 static bool is_delete_request(files_struct *fsp) {
1035         return ((fsp->access_mask == DELETE_ACCESS) &&
1036                 (fsp->oplock_type == NO_OPLOCK));
1037 }
1038
1039 /*
1040  * Send a break message to the oplock holder and delay the open for
1041  * our client.
1042  */
1043
1044 static NTSTATUS send_break_message(files_struct *fsp,
1045                                         struct share_mode_entry *exclusive,
1046                                         uint64_t mid,
1047                                         int oplock_request)
1048 {
1049         NTSTATUS status;
1050         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1051
1052         DEBUG(10, ("Sending break request to PID %s\n",
1053                    procid_str_static(&exclusive->pid)));
1054         exclusive->op_mid = mid;
1055
1056         /* Create the message. */
1057         share_mode_entry_to_message(msg, exclusive);
1058
1059         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1060            don't want this set in the share mode struct pointed to by lck. */
1061
1062         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1063                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1064                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1065         }
1066
1067         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1068                                     MSG_SMB_BREAK_REQUEST,
1069                                     (uint8 *)msg,
1070                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1071         if (!NT_STATUS_IS_OK(status)) {
1072                 DEBUG(3, ("Could not send oplock break message: %s\n",
1073                           nt_errstr(status)));
1074         }
1075
1076         return status;
1077 }
1078
1079 /*
1080  * Return share_mode_entry pointers for :
1081  * 1). Batch oplock entry.
1082  * 2). Batch or exclusive oplock entry (may be identical to #1).
1083  * bool have_level2_oplock
1084  * bool have_no_oplock.
1085  * Do internal consistency checks on the share mode for a file.
1086  */
1087
1088 static void find_oplock_types(files_struct *fsp,
1089                                 int oplock_request,
1090                                 const struct share_mode_lock *lck,
1091                                 struct share_mode_entry **pp_batch,
1092                                 struct share_mode_entry **pp_ex_or_batch,
1093                                 bool *got_level2,
1094                                 bool *got_no_oplock)
1095 {
1096         int i;
1097
1098         *pp_batch = NULL;
1099         *pp_ex_or_batch = NULL;
1100         *got_level2 = false;
1101         *got_no_oplock = false;
1102
1103         /* Ignore stat or internal opens, as is done in
1104                 delay_for_batch_oplocks() and
1105                 delay_for_exclusive_oplocks().
1106          */
1107         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1108                 return;
1109         }
1110
1111         for (i=0; i<lck->data->num_share_modes; i++) {
1112                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1113                         continue;
1114                 }
1115
1116                 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1117                                 is_stat_open(lck->data->share_modes[i].access_mask)) {
1118                         /* We ignore stat opens in the table - they
1119                            always have NO_OPLOCK and never get or
1120                            cause breaks. JRA. */
1121                         continue;
1122                 }
1123
1124                 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1125                         /* batch - can only be one. */
1126                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1127                                 smb_panic("Bad batch oplock entry.");
1128                         }
1129                         *pp_batch = &lck->data->share_modes[i];
1130                 }
1131
1132                 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1133                         /* Exclusive or batch - can only be one. */
1134                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1135                                 smb_panic("Bad exclusive or batch oplock entry.");
1136                         }
1137                         *pp_ex_or_batch = &lck->data->share_modes[i];
1138                 }
1139
1140                 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1141                         if (*pp_batch || *pp_ex_or_batch) {
1142                                 smb_panic("Bad levelII oplock entry.");
1143                         }
1144                         *got_level2 = true;
1145                 }
1146
1147                 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1148                         if (*pp_batch || *pp_ex_or_batch) {
1149                                 smb_panic("Bad no oplock entry.");
1150                         }
1151                         *got_no_oplock = true;
1152                 }
1153         }
1154 }
1155
1156 static bool delay_for_batch_oplocks(files_struct *fsp,
1157                                         uint64_t mid,
1158                                         int oplock_request,
1159                                         struct share_mode_entry *batch_entry)
1160 {
1161         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1162                 return false;
1163         }
1164         if (batch_entry == NULL) {
1165                 return false;
1166         }
1167
1168         /* Found a batch oplock */
1169         send_break_message(fsp, batch_entry, mid, oplock_request);
1170         return true;
1171 }
1172
1173 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1174                                         uint64_t mid,
1175                                         int oplock_request,
1176                                         struct share_mode_entry *ex_entry)
1177 {
1178         bool delay_it;
1179
1180         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1181                 return false;
1182         }
1183         if (ex_entry == NULL) {
1184                 return false;
1185         }
1186
1187         /* Found an exclusive or batch oplock */
1188
1189         delay_it = is_delete_request(fsp) ?
1190                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1191
1192         if (!delay_it) {
1193                 return false;
1194         }
1195
1196         send_break_message(fsp, ex_entry, mid, oplock_request);
1197         return true;
1198 }
1199
1200 static bool file_has_brlocks(files_struct *fsp)
1201 {
1202         struct byte_range_lock *br_lck;
1203
1204         br_lck = brl_get_locks_readonly(fsp);
1205         if (!br_lck)
1206                 return false;
1207
1208         return br_lck->num_locks > 0 ? true : false;
1209 }
1210
1211 static void grant_fsp_oplock_type(files_struct *fsp,
1212                                 int oplock_request,
1213                                 bool got_level2_oplock,
1214                                 bool got_a_none_oplock)
1215 {
1216         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1217                             lp_level2_oplocks(SNUM(fsp->conn));
1218
1219         /* Start by granting what the client asked for,
1220            but ensure no SAMBA_PRIVATE bits can be set. */
1221         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1222
1223         if (oplock_request & INTERNAL_OPEN_ONLY) {
1224                 /* No oplocks on internal open. */
1225                 fsp->oplock_type = NO_OPLOCK;
1226                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1227                         fsp->oplock_type, fsp_str_dbg(fsp)));
1228                 return;
1229         } else if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1230                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1231                         fsp_str_dbg(fsp)));
1232                 fsp->oplock_type = NO_OPLOCK;
1233         }
1234
1235         if (is_stat_open(fsp->access_mask)) {
1236                 /* Leave the value already set. */
1237                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1238                         fsp->oplock_type, fsp_str_dbg(fsp)));
1239                 return;
1240         }
1241
1242         /*
1243          * Match what was requested (fsp->oplock_type) with
1244          * what was found in the existing share modes.
1245          */
1246
1247         if (got_a_none_oplock) {
1248                 fsp->oplock_type = NO_OPLOCK;
1249         } else if (got_level2_oplock) {
1250                 if (fsp->oplock_type == NO_OPLOCK ||
1251                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1252                         /* Store a level2 oplock, but don't tell the client */
1253                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1254                 } else {
1255                         fsp->oplock_type = LEVEL_II_OPLOCK;
1256                 }
1257         } else {
1258                 /* All share_mode_entries are placeholders or deferred.
1259                  * Silently upgrade to fake levelII if the client didn't
1260                  * ask for an oplock. */
1261                 if (fsp->oplock_type == NO_OPLOCK) {
1262                         /* Store a level2 oplock, but don't tell the client */
1263                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1264                 }
1265         }
1266
1267         /*
1268          * Don't grant level2 to clients that don't want them
1269          * or if we've turned them off.
1270          */
1271         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1272                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1273         }
1274
1275         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1276                   fsp->oplock_type, fsp_str_dbg(fsp)));
1277 }
1278
1279 bool request_timed_out(struct timeval request_time,
1280                        struct timeval timeout)
1281 {
1282         struct timeval now, end_time;
1283         GetTimeOfDay(&now);
1284         end_time = timeval_sum(&request_time, &timeout);
1285         return (timeval_compare(&end_time, &now) < 0);
1286 }
1287
1288 /****************************************************************************
1289  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1290 ****************************************************************************/
1291
1292 static void defer_open(struct share_mode_lock *lck,
1293                        struct timeval request_time,
1294                        struct timeval timeout,
1295                        struct smb_request *req,
1296                        struct deferred_open_record *state)
1297 {
1298         int i;
1299
1300         /* Paranoia check */
1301
1302         for (i=0; i<lck->data->num_share_modes; i++) {
1303                 struct share_mode_entry *e = &lck->data->share_modes[i];
1304
1305                 if (is_deferred_open_entry(e) &&
1306                     procid_is_me(&e->pid) &&
1307                     (e->op_mid == req->mid)) {
1308                         DEBUG(0, ("Trying to defer an already deferred "
1309                                 "request: mid=%llu, exiting\n",
1310                                 (unsigned long long)req->mid));
1311                         exit_server("attempt to defer a deferred request");
1312                 }
1313         }
1314
1315         /* End paranoia check */
1316
1317         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1318                   "open entry for mid %llu\n",
1319                   (unsigned int)request_time.tv_sec,
1320                   (unsigned int)request_time.tv_usec,
1321                   (unsigned long long)req->mid));
1322
1323         if (!push_deferred_open_message_smb(req, request_time, timeout,
1324                                        state->id, (char *)state, sizeof(*state))) {
1325                 exit_server("push_deferred_open_message_smb failed");
1326         }
1327         add_deferred_open(lck, req->mid, request_time,
1328                           messaging_server_id(req->sconn->msg_ctx), state->id);
1329 }
1330
1331
1332 /****************************************************************************
1333  On overwrite open ensure that the attributes match.
1334 ****************************************************************************/
1335
1336 bool open_match_attributes(connection_struct *conn,
1337                            uint32 old_dos_attr,
1338                            uint32 new_dos_attr,
1339                            mode_t existing_unx_mode,
1340                            mode_t new_unx_mode,
1341                            mode_t *returned_unx_mode)
1342 {
1343         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1344
1345         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1346         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1347
1348         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) || 
1349            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1350                 *returned_unx_mode = new_unx_mode;
1351         } else {
1352                 *returned_unx_mode = (mode_t)0;
1353         }
1354
1355         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1356                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1357                   "returned_unx_mode = 0%o\n",
1358                   (unsigned int)old_dos_attr,
1359                   (unsigned int)existing_unx_mode,
1360                   (unsigned int)new_dos_attr,
1361                   (unsigned int)*returned_unx_mode ));
1362
1363         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1364         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1365                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1366                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1367                         return False;
1368                 }
1369         }
1370         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1371                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1372                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1373                         return False;
1374                 }
1375         }
1376         return True;
1377 }
1378
1379 /****************************************************************************
1380  Special FCB or DOS processing in the case of a sharing violation.
1381  Try and find a duplicated file handle.
1382 ****************************************************************************/
1383
1384 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1385                                      connection_struct *conn,
1386                                      files_struct *fsp_to_dup_into,
1387                                      const struct smb_filename *smb_fname,
1388                                      struct file_id id,
1389                                      uint16 file_pid,
1390                                      uint16 vuid,
1391                                      uint32 access_mask,
1392                                      uint32 share_access,
1393                                      uint32 create_options)
1394 {
1395         files_struct *fsp;
1396
1397         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1398                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1399
1400         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1401             fsp = file_find_di_next(fsp)) {
1402
1403                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1404                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1405                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1406                           fsp->fh->fd, (unsigned int)fsp->vuid,
1407                           (unsigned int)fsp->file_pid,
1408                           (unsigned int)fsp->fh->private_options,
1409                           (unsigned int)fsp->access_mask ));
1410
1411                 if (fsp->fh->fd != -1 &&
1412                     fsp->vuid == vuid &&
1413                     fsp->file_pid == file_pid &&
1414                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1415                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1416                     (fsp->access_mask & FILE_WRITE_DATA) &&
1417                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1418                     strequal(fsp->fsp_name->stream_name,
1419                              smb_fname->stream_name)) {
1420                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1421                         break;
1422                 }
1423         }
1424
1425         if (!fsp) {
1426                 return NT_STATUS_NOT_FOUND;
1427         }
1428
1429         /* quite an insane set of semantics ... */
1430         if (is_executable(smb_fname->base_name) &&
1431             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1432                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1433                 return NT_STATUS_INVALID_PARAMETER;
1434         }
1435
1436         /* We need to duplicate this fsp. */
1437         return dup_file_fsp(req, fsp, access_mask, share_access,
1438                             create_options, fsp_to_dup_into);
1439 }
1440
1441 static void schedule_defer_open(struct share_mode_lock *lck,
1442                                 struct timeval request_time,
1443                                 struct smb_request *req)
1444 {
1445         struct deferred_open_record state;
1446
1447         /* This is a relative time, added to the absolute
1448            request_time value to get the absolute timeout time.
1449            Note that if this is the second or greater time we enter
1450            this codepath for this particular request mid then
1451            request_time is left as the absolute time of the *first*
1452            time this request mid was processed. This is what allows
1453            the request to eventually time out. */
1454
1455         struct timeval timeout;
1456
1457         /* Normally the smbd we asked should respond within
1458          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1459          * the client did, give twice the timeout as a safety
1460          * measure here in case the other smbd is stuck
1461          * somewhere else. */
1462
1463         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1464
1465         /* Nothing actually uses state.delayed_for_oplocks
1466            but it's handy to differentiate in debug messages
1467            between a 30 second delay due to oplock break, and
1468            a 1 second delay for share mode conflicts. */
1469
1470         state.delayed_for_oplocks = True;
1471         state.id = lck->data->id;
1472
1473         if (!request_timed_out(request_time, timeout)) {
1474                 defer_open(lck, request_time, timeout, req, &state);
1475         }
1476 }
1477
1478 /****************************************************************************
1479  Work out what access_mask to use from what the client sent us.
1480 ****************************************************************************/
1481
1482 static NTSTATUS smbd_calculate_maximum_allowed_access(
1483         connection_struct *conn,
1484         const struct smb_filename *smb_fname,
1485         uint32_t *p_access_mask)
1486 {
1487         struct security_descriptor *sd;
1488         uint32_t access_granted;
1489         NTSTATUS status;
1490
1491         if (get_current_uid(conn) == (uid_t)0) {
1492                 *p_access_mask |= FILE_GENERIC_ALL;
1493                 return NT_STATUS_OK;
1494         }
1495
1496         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1497                                     (SECINFO_OWNER |
1498                                      SECINFO_GROUP |
1499                                      SECINFO_DACL),&sd);
1500
1501         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1502                 /*
1503                  * File did not exist
1504                  */
1505                 *p_access_mask = FILE_GENERIC_ALL;
1506                 return NT_STATUS_OK;
1507         }
1508         if (!NT_STATUS_IS_OK(status)) {
1509                 DEBUG(10,("smbd_calculate_access_mask: "
1510                           "Could not get acl on file %s: %s\n",
1511                           smb_fname_str_dbg(smb_fname),
1512                           nt_errstr(status)));
1513                 return NT_STATUS_ACCESS_DENIED;
1514         }
1515
1516         /*
1517          * Never test FILE_READ_ATTRIBUTES. se_access_check()
1518          * also takes care of owner WRITE_DAC and READ_CONTROL.
1519          */
1520         status = se_access_check(sd,
1521                                  get_current_nttok(conn),
1522                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1523                                  &access_granted);
1524
1525         TALLOC_FREE(sd);
1526
1527         if (!NT_STATUS_IS_OK(status)) {
1528                 DEBUG(10, ("smbd_calculate_access_mask: "
1529                            "Access denied on file %s: "
1530                            "when calculating maximum access\n",
1531                            smb_fname_str_dbg(smb_fname)));
1532                 return NT_STATUS_ACCESS_DENIED;
1533         }
1534         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1535         return NT_STATUS_OK;
1536 }
1537
1538 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1539                                     const struct smb_filename *smb_fname,
1540                                     uint32_t access_mask,
1541                                     uint32_t *access_mask_out)
1542 {
1543         NTSTATUS status;
1544         uint32_t orig_access_mask = access_mask;
1545         uint32_t rejected_share_access;
1546
1547         /*
1548          * Convert GENERIC bits to specific bits.
1549          */
1550
1551         se_map_generic(&access_mask, &file_generic_mapping);
1552
1553         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1554         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1555
1556                 status = smbd_calculate_maximum_allowed_access(
1557                         conn, smb_fname, &access_mask);
1558
1559                 if (!NT_STATUS_IS_OK(status)) {
1560                         return status;
1561                 }
1562
1563                 access_mask &= conn->share_access;
1564         }
1565
1566         rejected_share_access = access_mask & ~(conn->share_access);
1567
1568         if (rejected_share_access) {
1569                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1570                         "file %s: rejected by share access mask[0x%08X] "
1571                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1572                         smb_fname_str_dbg(smb_fname),
1573                         conn->share_access,
1574                         orig_access_mask, access_mask,
1575                         rejected_share_access));
1576                 return NT_STATUS_ACCESS_DENIED;
1577         }
1578
1579         *access_mask_out = access_mask;
1580         return NT_STATUS_OK;
1581 }
1582
1583 /****************************************************************************
1584  Remove the deferred open entry under lock.
1585 ****************************************************************************/
1586
1587 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1588                                 struct server_id pid)
1589 {
1590         struct share_mode_lock *lck = get_existing_share_mode_lock(
1591                 talloc_tos(), id);
1592         if (lck == NULL) {
1593                 DEBUG(0, ("could not get share mode lock\n"));
1594                 return;
1595         }
1596         del_deferred_open_entry(lck, mid, pid);
1597         TALLOC_FREE(lck);
1598 }
1599
1600 /****************************************************************************
1601  Open a file with a share mode. Passed in an already created files_struct *.
1602 ****************************************************************************/
1603
1604 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1605                             struct smb_request *req,
1606                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1607                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1608                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1609                             uint32 create_options,      /* options such as delete on close. */
1610                             uint32 new_dos_attributes,  /* attributes used for new file. */
1611                             int oplock_request,         /* internal Samba oplock codes. */
1612                                                         /* Information (FILE_EXISTS etc.) */
1613                             uint32_t private_flags,     /* Samba specific flags. */
1614                             int *pinfo,
1615                             files_struct *fsp)
1616 {
1617         struct smb_filename *smb_fname = fsp->fsp_name;
1618         int flags=0;
1619         int flags2=0;
1620         bool file_existed = VALID_STAT(smb_fname->st);
1621         bool def_acl = False;
1622         bool posix_open = False;
1623         bool new_file_created = False;
1624         bool clear_ads = false;
1625         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1626         mode_t new_unx_mode = (mode_t)0;
1627         mode_t unx_mode = (mode_t)0;
1628         int info;
1629         uint32 existing_dos_attributes = 0;
1630         struct timeval request_time = timeval_zero();
1631         struct share_mode_lock *lck = NULL;
1632         uint32 open_access_mask = access_mask;
1633         NTSTATUS status;
1634         char *parent_dir;
1635
1636         if (conn->printer) {
1637                 /*
1638                  * Printers are handled completely differently.
1639                  * Most of the passed parameters are ignored.
1640                  */
1641
1642                 if (pinfo) {
1643                         *pinfo = FILE_WAS_CREATED;
1644                 }
1645
1646                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1647                            smb_fname_str_dbg(smb_fname)));
1648
1649                 if (!req) {
1650                         DEBUG(0,("open_file_ntcreate: printer open without "
1651                                 "an SMB request!\n"));
1652                         return NT_STATUS_INTERNAL_ERROR;
1653                 }
1654
1655                 return print_spool_open(fsp, smb_fname->base_name,
1656                                         req->vuid);
1657         }
1658
1659         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1660                             NULL)) {
1661                 return NT_STATUS_NO_MEMORY;
1662         }
1663
1664         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1665                 posix_open = True;
1666                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1667                 new_dos_attributes = 0;
1668         } else {
1669                 /* Windows allows a new file to be created and
1670                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1671                    sent by the client. Do the same. */
1672
1673                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1674
1675                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1676                  * created new. */
1677                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1678                                      smb_fname, parent_dir);
1679         }
1680
1681         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1682                    "access_mask=0x%x share_access=0x%x "
1683                    "create_disposition = 0x%x create_options=0x%x "
1684                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1685                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1686                    access_mask, share_access, create_disposition,
1687                    create_options, (unsigned int)unx_mode, oplock_request,
1688                    (unsigned int)private_flags));
1689
1690         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1691                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1692                 return NT_STATUS_INTERNAL_ERROR;
1693         }
1694
1695         /*
1696          * Only non-internal opens can be deferred at all
1697          */
1698
1699         if (req) {
1700                 void *ptr;
1701                 if (get_deferred_open_message_state(req,
1702                                 &request_time,
1703                                 &ptr)) {
1704
1705                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1706                         /* Remember the absolute time of the original
1707                            request with this mid. We'll use it later to
1708                            see if this has timed out. */
1709
1710                         /* Remove the deferred open entry under lock. */
1711                         remove_deferred_open_entry(
1712                                 state->id, req->mid,
1713                                 messaging_server_id(req->sconn->msg_ctx));
1714
1715                         /* Ensure we don't reprocess this message. */
1716                         remove_deferred_open_message_smb(req->sconn, req->mid);
1717                 }
1718         }
1719
1720         if (!posix_open) {
1721                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1722                 if (file_existed) {
1723                         existing_dos_attributes = dos_mode(conn, smb_fname);
1724                 }
1725         }
1726
1727         /* ignore any oplock requests if oplocks are disabled */
1728         if (!lp_oplocks(SNUM(conn)) ||
1729             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1730                 /* Mask off everything except the private Samba bits. */
1731                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1732         }
1733
1734         /* this is for OS/2 long file names - say we don't support them */
1735         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1736                 /* OS/2 Workplace shell fix may be main code stream in a later
1737                  * release. */
1738                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1739                          "supported.\n"));
1740                 if (use_nt_status()) {
1741                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1742                 }
1743                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1744         }
1745
1746         switch( create_disposition ) {
1747                 /*
1748                  * Currently we're using FILE_SUPERSEDE as the same as
1749                  * FILE_OVERWRITE_IF but they really are
1750                  * different. FILE_SUPERSEDE deletes an existing file
1751                  * (requiring delete access) then recreates it.
1752                  */
1753                 case FILE_SUPERSEDE:
1754                         /* If file exists replace/overwrite. If file doesn't
1755                          * exist create. */
1756                         flags2 |= (O_CREAT | O_TRUNC);
1757                         clear_ads = true;
1758                         break;
1759
1760                 case FILE_OVERWRITE_IF:
1761                         /* If file exists replace/overwrite. If file doesn't
1762                          * exist create. */
1763                         flags2 |= (O_CREAT | O_TRUNC);
1764                         clear_ads = true;
1765                         break;
1766
1767                 case FILE_OPEN:
1768                         /* If file exists open. If file doesn't exist error. */
1769                         if (!file_existed) {
1770                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1771                                          "requested for file %s and file "
1772                                          "doesn't exist.\n",
1773                                          smb_fname_str_dbg(smb_fname)));
1774                                 errno = ENOENT;
1775                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1776                         }
1777                         break;
1778
1779                 case FILE_OVERWRITE:
1780                         /* If file exists overwrite. If file doesn't exist
1781                          * error. */
1782                         if (!file_existed) {
1783                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1784                                          "requested for file %s and file "
1785                                          "doesn't exist.\n",
1786                                          smb_fname_str_dbg(smb_fname) ));
1787                                 errno = ENOENT;
1788                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1789                         }
1790                         flags2 |= O_TRUNC;
1791                         clear_ads = true;
1792                         break;
1793
1794                 case FILE_CREATE:
1795                         /* If file exists error. If file doesn't exist
1796                          * create. */
1797                         if (file_existed) {
1798                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1799                                          "requested for file %s and file "
1800                                          "already exists.\n",
1801                                          smb_fname_str_dbg(smb_fname)));
1802                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1803                                         errno = EISDIR;
1804                                 } else {
1805                                         errno = EEXIST;
1806                                 }
1807                                 return map_nt_error_from_unix(errno);
1808                         }
1809                         flags2 |= (O_CREAT|O_EXCL);
1810                         break;
1811
1812                 case FILE_OPEN_IF:
1813                         /* If file exists open. If file doesn't exist
1814                          * create. */
1815                         flags2 |= O_CREAT;
1816                         break;
1817
1818                 default:
1819                         return NT_STATUS_INVALID_PARAMETER;
1820         }
1821
1822         /* We only care about matching attributes on file exists and
1823          * overwrite. */
1824
1825         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1826                              (create_disposition == FILE_OVERWRITE_IF))) {
1827                 if (!open_match_attributes(conn, existing_dos_attributes,
1828                                            new_dos_attributes,
1829                                            smb_fname->st.st_ex_mode,
1830                                            unx_mode, &new_unx_mode)) {
1831                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1832                                  "for file %s (%x %x) (0%o, 0%o)\n",
1833                                  smb_fname_str_dbg(smb_fname),
1834                                  existing_dos_attributes,
1835                                  new_dos_attributes,
1836                                  (unsigned int)smb_fname->st.st_ex_mode,
1837                                  (unsigned int)unx_mode ));
1838                         errno = EACCES;
1839                         return NT_STATUS_ACCESS_DENIED;
1840                 }
1841         }
1842
1843         status = smbd_calculate_access_mask(conn, smb_fname,
1844                                         access_mask,
1845                                         &access_mask); 
1846         if (!NT_STATUS_IS_OK(status)) {
1847                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1848                         "on file %s returned %s\n",
1849                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1850                 return status;
1851         }
1852
1853         open_access_mask = access_mask;
1854
1855         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1856                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1857         }
1858
1859         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1860                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1861                     access_mask));
1862
1863         /*
1864          * Note that we ignore the append flag as append does not
1865          * mean the same thing under DOS and Unix.
1866          */
1867
1868         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1869                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1870                 /* DENY_DOS opens are always underlying read-write on the
1871                    file handle, no matter what the requested access mask
1872                     says. */
1873                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1874                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1875                         flags = O_RDWR;
1876                 } else {
1877                         flags = O_WRONLY;
1878                 }
1879         } else {
1880                 flags = O_RDONLY;
1881         }
1882
1883         /*
1884          * Currently we only look at FILE_WRITE_THROUGH for create options.
1885          */
1886
1887 #if defined(O_SYNC)
1888         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1889                 flags2 |= O_SYNC;
1890         }
1891 #endif /* O_SYNC */
1892
1893         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1894                 flags2 |= O_APPEND;
1895         }
1896
1897         if (!posix_open && !CAN_WRITE(conn)) {
1898                 /*
1899                  * We should really return a permission denied error if either
1900                  * O_CREAT or O_TRUNC are set, but for compatibility with
1901                  * older versions of Samba we just AND them out.
1902                  */
1903                 flags2 &= ~(O_CREAT|O_TRUNC);
1904         }
1905
1906         /*
1907          * Ensure we can't write on a read-only share or file.
1908          */
1909
1910         if (flags != O_RDONLY && file_existed &&
1911             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1912                 DEBUG(5,("open_file_ntcreate: write access requested for "
1913                          "file %s on read only %s\n",
1914                          smb_fname_str_dbg(smb_fname),
1915                          !CAN_WRITE(conn) ? "share" : "file" ));
1916                 errno = EACCES;
1917                 return NT_STATUS_ACCESS_DENIED;
1918         }
1919
1920         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1921         fsp->share_access = share_access;
1922         fsp->fh->private_options = private_flags;
1923         fsp->access_mask = open_access_mask; /* We change this to the
1924                                               * requested access_mask after
1925                                               * the open is done. */
1926         fsp->posix_open = posix_open;
1927
1928         /* Ensure no SAMBA_PRIVATE bits can be set. */
1929         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1930
1931         if (timeval_is_zero(&request_time)) {
1932                 request_time = fsp->open_time;
1933         }
1934
1935         if (file_existed) {
1936                 struct share_mode_entry *batch_entry = NULL;
1937                 struct share_mode_entry *exclusive_entry = NULL;
1938                 bool got_level2_oplock = false;
1939                 bool got_a_none_oplock = false;
1940                 struct file_id id;
1941
1942                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1943                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1944
1945                 lck = get_share_mode_lock(talloc_tos(), id,
1946                                           conn->connectpath,
1947                                           smb_fname, &old_write_time);
1948                 if (lck == NULL) {
1949                         DEBUG(0, ("Could not get share mode lock\n"));
1950                         return NT_STATUS_SHARING_VIOLATION;
1951                 }
1952
1953                 /* Get the types we need to examine. */
1954                 find_oplock_types(fsp,
1955                                 oplock_request,
1956                                 lck,
1957                                 &batch_entry,
1958                                 &exclusive_entry,
1959                                 &got_level2_oplock,
1960                                 &got_a_none_oplock);
1961
1962                 /* First pass - send break only on batch oplocks. */
1963                 if ((req != NULL) &&
1964                                 delay_for_batch_oplocks(fsp,
1965                                         req->mid,
1966                                         oplock_request,
1967                                         batch_entry)) {
1968                         schedule_defer_open(lck, request_time, req);
1969                         TALLOC_FREE(lck);
1970                         return NT_STATUS_SHARING_VIOLATION;
1971                 }
1972
1973                 /* Use the client requested access mask here, not the one we
1974                  * open with. */
1975                 status = open_mode_check(conn, lck, fsp->name_hash,
1976                                         access_mask, share_access,
1977                                          create_options, &file_existed);
1978
1979                 if (NT_STATUS_IS_OK(status)) {
1980                         /* We might be going to allow this open. Check oplock
1981                          * status again. */
1982                         /* Second pass - send break for both batch or
1983                          * exclusive oplocks. */
1984                         if ((req != NULL) &&
1985                                         delay_for_exclusive_oplocks(
1986                                                 fsp,
1987                                                 req->mid,
1988                                                 oplock_request,
1989                                                 exclusive_entry)) {
1990                                 schedule_defer_open(lck, request_time, req);
1991                                 TALLOC_FREE(lck);
1992                                 return NT_STATUS_SHARING_VIOLATION;
1993                         }
1994                 }
1995
1996                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1997                         /* DELETE_PENDING is not deferred for a second */
1998                         TALLOC_FREE(lck);
1999                         return status;
2000                 }
2001
2002                 grant_fsp_oplock_type(fsp,
2003                                 oplock_request,
2004                                 got_level2_oplock,
2005                                 got_a_none_oplock);
2006
2007                 if (!NT_STATUS_IS_OK(status)) {
2008                         uint32 can_access_mask;
2009                         bool can_access = True;
2010
2011                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2012
2013                         /* Check if this can be done with the deny_dos and fcb
2014                          * calls. */
2015                         if (private_flags &
2016                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2017                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2018                                 if (req == NULL) {
2019                                         DEBUG(0, ("DOS open without an SMB "
2020                                                   "request!\n"));
2021                                         TALLOC_FREE(lck);
2022                                         return NT_STATUS_INTERNAL_ERROR;
2023                                 }
2024
2025                                 /* Use the client requested access mask here,
2026                                  * not the one we open with. */
2027                                 status = fcb_or_dos_open(req,
2028                                                         conn,
2029                                                         fsp,
2030                                                         smb_fname,
2031                                                         id,
2032                                                         req->smbpid,
2033                                                         req->vuid,
2034                                                         access_mask,
2035                                                         share_access,
2036                                                         create_options);
2037
2038                                 if (NT_STATUS_IS_OK(status)) {
2039                                         TALLOC_FREE(lck);
2040                                         if (pinfo) {
2041                                                 *pinfo = FILE_WAS_OPENED;
2042                                         }
2043                                         return NT_STATUS_OK;
2044                                 }
2045                         }
2046
2047                         /*
2048                          * This next line is a subtlety we need for
2049                          * MS-Access. If a file open will fail due to share
2050                          * permissions and also for security (access) reasons,
2051                          * we need to return the access failed error, not the
2052                          * share error. We can't open the file due to kernel
2053                          * oplock deadlock (it's possible we failed above on
2054                          * the open_mode_check()) so use a userspace check.
2055                          */
2056
2057                         if (flags & O_RDWR) {
2058                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2059                         } else if (flags & O_WRONLY) {
2060                                 can_access_mask = FILE_WRITE_DATA;
2061                         } else {
2062                                 can_access_mask = FILE_READ_DATA;
2063                         }
2064
2065                         if (((can_access_mask & FILE_WRITE_DATA) &&
2066                                 !CAN_WRITE(conn)) ||
2067                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2068                                                 smb_fname, can_access_mask))) {
2069                                 can_access = False;
2070                         }
2071
2072                         /*
2073                          * If we're returning a share violation, ensure we
2074                          * cope with the braindead 1 second delay.
2075                          */
2076
2077                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2078                             lp_defer_sharing_violations()) {
2079                                 struct timeval timeout;
2080                                 struct deferred_open_record state;
2081                                 int timeout_usecs;
2082
2083                                 /* this is a hack to speed up torture tests
2084                                    in 'make test' */
2085                                 timeout_usecs = lp_parm_int(SNUM(conn),
2086                                                             "smbd","sharedelay",
2087                                                             SHARING_VIOLATION_USEC_WAIT);
2088
2089                                 /* This is a relative time, added to the absolute
2090                                    request_time value to get the absolute timeout time.
2091                                    Note that if this is the second or greater time we enter
2092                                    this codepath for this particular request mid then
2093                                    request_time is left as the absolute time of the *first*
2094                                    time this request mid was processed. This is what allows
2095                                    the request to eventually time out. */
2096
2097                                 timeout = timeval_set(0, timeout_usecs);
2098
2099                                 /* Nothing actually uses state.delayed_for_oplocks
2100                                    but it's handy to differentiate in debug messages
2101                                    between a 30 second delay due to oplock break, and
2102                                    a 1 second delay for share mode conflicts. */
2103
2104                                 state.delayed_for_oplocks = False;
2105                                 state.id = id;
2106
2107                                 if ((req != NULL)
2108                                     && !request_timed_out(request_time,
2109                                                           timeout)) {
2110                                         defer_open(lck, request_time, timeout,
2111                                                    req, &state);
2112                                 }
2113                         }
2114
2115                         TALLOC_FREE(lck);
2116                         if (can_access) {
2117                                 /*
2118                                  * We have detected a sharing violation here
2119                                  * so return the correct error code
2120                                  */
2121                                 status = NT_STATUS_SHARING_VIOLATION;
2122                         } else {
2123                                 status = NT_STATUS_ACCESS_DENIED;
2124                         }
2125                         return status;
2126                 }
2127
2128                 /*
2129                  * We exit this block with the share entry *locked*.....
2130                  */
2131         }
2132
2133         SMB_ASSERT(!file_existed || (lck != NULL));
2134
2135         /*
2136          * Ensure we pay attention to default ACLs on directories if required.
2137          */
2138
2139         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2140             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2141                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2142         }
2143
2144         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2145                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2146                  (unsigned int)flags, (unsigned int)flags2,
2147                  (unsigned int)unx_mode, (unsigned int)access_mask,
2148                  (unsigned int)open_access_mask));
2149
2150         /*
2151          * open_file strips any O_TRUNC flags itself.
2152          */
2153
2154         fsp_open = open_file(fsp, conn, req, parent_dir,
2155                              flags|flags2, unx_mode, access_mask,
2156                              open_access_mask);
2157
2158         if (!NT_STATUS_IS_OK(fsp_open)) {
2159                 TALLOC_FREE(lck);
2160                 return fsp_open;
2161         }
2162
2163         if (!file_existed) {
2164                 struct share_mode_entry *batch_entry = NULL;
2165                 struct share_mode_entry *exclusive_entry = NULL;
2166                 bool got_level2_oplock = false;
2167                 bool got_a_none_oplock = false;
2168                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2169                 struct file_id id;
2170                 /*
2171                  * Deal with the race condition where two smbd's detect the
2172                  * file doesn't exist and do the create at the same time. One
2173                  * of them will win and set a share mode, the other (ie. this
2174                  * one) should check if the requested share mode for this
2175                  * create is allowed.
2176                  */
2177
2178                 /*
2179                  * Now the file exists and fsp is successfully opened,
2180                  * fsp->dev and fsp->inode are valid and should replace the
2181                  * dev=0,inode=0 from a non existent file. Spotted by
2182                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2183                  */
2184
2185                 id = fsp->file_id;
2186
2187                 lck = get_share_mode_lock(talloc_tos(), id,
2188                                           conn->connectpath,
2189                                           smb_fname, &old_write_time);
2190
2191                 if (lck == NULL) {
2192                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2193                                   "mode lock for %s\n",
2194                                   smb_fname_str_dbg(smb_fname)));
2195                         fd_close(fsp);
2196                         return NT_STATUS_SHARING_VIOLATION;
2197                 }
2198
2199                 /* Get the types we need to examine. */
2200                 find_oplock_types(fsp,
2201                                 oplock_request,
2202                                 lck,
2203                                 &batch_entry,
2204                                 &exclusive_entry,
2205                                 &got_level2_oplock,
2206                                 &got_a_none_oplock);
2207
2208                 /* First pass - send break only on batch oplocks. */
2209                 if ((req != NULL) &&
2210                                 delay_for_batch_oplocks(fsp,
2211                                         req->mid,
2212                                         oplock_request,
2213                                         batch_entry)) {
2214                         schedule_defer_open(lck, request_time, req);
2215                         TALLOC_FREE(lck);
2216                         fd_close(fsp);
2217                         return NT_STATUS_SHARING_VIOLATION;
2218                 }
2219
2220                 status = open_mode_check(conn, lck, fsp->name_hash,
2221                                         access_mask, share_access,
2222                                          create_options, &file_existed);
2223
2224                 if (NT_STATUS_IS_OK(status)) {
2225                         /* We might be going to allow this open. Check oplock
2226                          * status again. */
2227                         /* Second pass - send break for both batch or
2228                          * exclusive oplocks. */
2229                         if ((req != NULL) &&
2230                                         delay_for_exclusive_oplocks(
2231                                                 fsp,
2232                                                 req->mid,
2233                                                 oplock_request,
2234                                                 exclusive_entry)) {
2235                                 schedule_defer_open(lck, request_time, req);
2236                                 TALLOC_FREE(lck);
2237                                 fd_close(fsp);
2238                                 return NT_STATUS_SHARING_VIOLATION;
2239                         }
2240                 }
2241
2242                 if (!NT_STATUS_IS_OK(status)) {
2243                         struct deferred_open_record state;
2244
2245                         state.delayed_for_oplocks = False;
2246                         state.id = id;
2247
2248                         /* Do it all over again immediately. In the second
2249                          * round we will find that the file existed and handle
2250                          * the DELETE_PENDING and FCB cases correctly. No need
2251                          * to duplicate the code here. Essentially this is a
2252                          * "goto top of this function", but don't tell
2253                          * anybody... */
2254
2255                         if (req != NULL) {
2256                                 defer_open(lck, request_time, timeval_zero(),
2257                                            req, &state);
2258                         }
2259                         TALLOC_FREE(lck);
2260                         fd_close(fsp);
2261                         return status;
2262                 }
2263
2264                 grant_fsp_oplock_type(fsp,
2265                                 oplock_request,
2266                                 got_level2_oplock,
2267                                 got_a_none_oplock);
2268
2269                 /*
2270                  * We exit this block with the share entry *locked*.....
2271                  */
2272
2273         }
2274
2275         SMB_ASSERT(lck != NULL);
2276
2277         /* Delete streams if create_disposition requires it */
2278         if (file_existed && clear_ads &&
2279             !is_ntfs_stream_smb_fname(smb_fname)) {
2280                 status = delete_all_streams(conn, smb_fname->base_name);
2281                 if (!NT_STATUS_IS_OK(status)) {
2282                         TALLOC_FREE(lck);
2283                         fd_close(fsp);
2284                         return status;
2285                 }
2286         }
2287
2288         /* note that we ignore failure for the following. It is
2289            basically a hack for NFS, and NFS will never set one of
2290            these only read them. Nobody but Samba can ever set a deny
2291            mode and we have already checked our more authoritative
2292            locking database for permission to set this deny mode. If
2293            the kernel refuses the operations then the kernel is wrong.
2294            note that GPFS supports it as well - jmcd */
2295
2296         if (fsp->fh->fd != -1) {
2297                 int ret_flock;
2298                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2299                 if(ret_flock == -1 ){
2300
2301                         TALLOC_FREE(lck);
2302                         fd_close(fsp);
2303
2304                         return NT_STATUS_SHARING_VIOLATION;
2305                 }
2306         }
2307
2308         /*
2309          * At this point onwards, we can guarentee that the share entry
2310          * is locked, whether we created the file or not, and that the
2311          * deny mode is compatible with all current opens.
2312          */
2313
2314         /*
2315          * If requested, truncate the file.
2316          */
2317
2318         if (file_existed && (flags2&O_TRUNC)) {
2319                 /*
2320                  * We are modifing the file after open - update the stat
2321                  * struct..
2322                  */
2323                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2324                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2325                         status = map_nt_error_from_unix(errno);
2326                         TALLOC_FREE(lck);
2327                         fd_close(fsp);
2328                         return status;
2329                 }
2330         }
2331
2332         /*
2333          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2334          * but we don't have to store this - just ignore it on access check.
2335          */
2336         if (conn->sconn->using_smb2) {
2337                 /*
2338                  * SMB2 doesn't return it (according to Microsoft tests).
2339                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2340                  * File created with access = 0x7 (Read, Write, Delete)
2341                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2342                  */
2343                 fsp->access_mask = access_mask;
2344         } else {
2345                 /* But SMB1 does. */
2346                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2347         }
2348
2349         if (file_existed) {
2350                 /* stat opens on existing files don't get oplocks. */
2351                 if (is_stat_open(open_access_mask)) {
2352                         fsp->oplock_type = NO_OPLOCK;
2353                 }
2354
2355                 if (flags2 & O_TRUNC) {
2356                         info = FILE_WAS_OVERWRITTEN;
2357                 } else {
2358                         info = FILE_WAS_OPENED;
2359                 }
2360         } else {
2361                 info = FILE_WAS_CREATED;
2362         }
2363
2364         if (pinfo) {
2365                 *pinfo = info;
2366         }
2367
2368         /*
2369          * Setup the oplock info in both the shared memory and
2370          * file structs.
2371          */
2372
2373         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2374                 /*
2375                  * Could not get the kernel oplock or there are byte-range
2376                  * locks on the file.
2377                  */
2378                 fsp->oplock_type = NO_OPLOCK;
2379         }
2380
2381         set_share_mode(lck, fsp, get_current_uid(conn),
2382                         req ? req->mid : 0,
2383                        fsp->oplock_type);
2384
2385         /* Handle strange delete on close create semantics. */
2386         if (create_options & FILE_DELETE_ON_CLOSE) {
2387
2388                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2389
2390                 if (!NT_STATUS_IS_OK(status)) {
2391                         /* Remember to delete the mode we just added. */
2392                         del_share_mode(lck, fsp);
2393                         TALLOC_FREE(lck);
2394                         fd_close(fsp);
2395                         return status;
2396                 }
2397                 /* Note that here we set the *inital* delete on close flag,
2398                    not the regular one. The magic gets handled in close. */
2399                 fsp->initial_delete_on_close = True;
2400         }
2401
2402         if (info == FILE_WAS_OVERWRITTEN
2403             || info == FILE_WAS_CREATED
2404             || info == FILE_WAS_SUPERSEDED) {
2405                 new_file_created = True;
2406         }
2407
2408         if (new_file_created) {
2409                 /* Files should be initially set as archive */
2410                 if (lp_map_archive(SNUM(conn)) ||
2411                     lp_store_dos_attributes(SNUM(conn))) {
2412                         if (!posix_open) {
2413                                 if (file_set_dosmode(conn, smb_fname,
2414                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2415                                             parent_dir, true) == 0) {
2416                                         unx_mode = smb_fname->st.st_ex_mode;
2417                                 }
2418                         }
2419                 }
2420         }
2421
2422         /* Determine sparse flag. */
2423         if (posix_open) {
2424                 /* POSIX opens are sparse by default. */
2425                 fsp->is_sparse = true;
2426         } else {
2427                 fsp->is_sparse = (file_existed &&
2428                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2429         }
2430
2431         /*
2432          * Take care of inherited ACLs on created files - if default ACL not
2433          * selected.
2434          */
2435
2436         if (!posix_open && !file_existed && !def_acl) {
2437
2438                 int saved_errno = errno; /* We might get ENOSYS in the next
2439                                           * call.. */
2440
2441                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2442                     errno == ENOSYS) {
2443                         errno = saved_errno; /* Ignore ENOSYS */
2444                 }
2445
2446         } else if (new_unx_mode) {
2447
2448                 int ret = -1;
2449
2450                 /* Attributes need changing. File already existed. */
2451
2452                 {
2453                         int saved_errno = errno; /* We might get ENOSYS in the
2454                                                   * next call.. */
2455                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2456
2457                         if (ret == -1 && errno == ENOSYS) {
2458                                 errno = saved_errno; /* Ignore ENOSYS */
2459                         } else {
2460                                 DEBUG(5, ("open_file_ntcreate: reset "
2461                                           "attributes of file %s to 0%o\n",
2462                                           smb_fname_str_dbg(smb_fname),
2463                                           (unsigned int)new_unx_mode));
2464                                 ret = 0; /* Don't do the fchmod below. */
2465                         }
2466                 }
2467
2468                 if ((ret == -1) &&
2469                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2470                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2471                                   "attributes of file %s to 0%o\n",
2472                                   smb_fname_str_dbg(smb_fname),
2473                                   (unsigned int)new_unx_mode));
2474         }
2475
2476         /* If this is a successful open, we must remove any deferred open
2477          * records. */
2478         if (req != NULL) {
2479                 del_deferred_open_entry(lck, req->mid,
2480                                         messaging_server_id(req->sconn->msg_ctx));
2481         }
2482         TALLOC_FREE(lck);
2483
2484         return NT_STATUS_OK;
2485 }
2486
2487
2488 /****************************************************************************
2489  Open a file for for write to ensure that we can fchmod it.
2490 ****************************************************************************/
2491
2492 NTSTATUS open_file_fchmod(connection_struct *conn,
2493                           struct smb_filename *smb_fname,
2494                           files_struct **result)
2495 {
2496         if (!VALID_STAT(smb_fname->st)) {
2497                 return NT_STATUS_INVALID_PARAMETER;
2498         }
2499
2500         return SMB_VFS_CREATE_FILE(
2501                 conn,                                   /* conn */
2502                 NULL,                                   /* req */
2503                 0,                                      /* root_dir_fid */
2504                 smb_fname,                              /* fname */
2505                 FILE_WRITE_DATA,                        /* access_mask */
2506                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2507                     FILE_SHARE_DELETE),
2508                 FILE_OPEN,                              /* create_disposition*/
2509                 0,                                      /* create_options */
2510                 0,                                      /* file_attributes */
2511                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2512                 0,                                      /* allocation_size */
2513                 0,                                      /* private_flags */
2514                 NULL,                                   /* sd */
2515                 NULL,                                   /* ea_list */
2516                 result,                                 /* result */
2517                 NULL);                                  /* pinfo */
2518 }
2519
2520 static NTSTATUS mkdir_internal(connection_struct *conn,
2521                                struct smb_filename *smb_dname,
2522                                uint32 file_attributes)
2523 {
2524         mode_t mode;
2525         char *parent_dir = NULL;
2526         NTSTATUS status;
2527         bool posix_open = false;
2528         bool need_re_stat = false;
2529         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2530
2531         if(access_mask & ~(conn->share_access)) {
2532                 DEBUG(5,("mkdir_internal: failing share access "
2533                          "%s\n", lp_servicename(SNUM(conn))));
2534                 return NT_STATUS_ACCESS_DENIED;
2535         }
2536
2537         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2538                             NULL)) {
2539                 return NT_STATUS_NO_MEMORY;
2540         }
2541
2542         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2543                 posix_open = true;
2544                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2545         } else {
2546                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2547         }
2548
2549         status = check_parent_access(conn,
2550                                         smb_dname,
2551                                         access_mask);
2552         if(!NT_STATUS_IS_OK(status)) {
2553                 DEBUG(5,("mkdir_internal: check_parent_access "
2554                         "on directory %s for path %s returned %s\n",
2555                         parent_dir,
2556                         smb_dname->base_name,
2557                         nt_errstr(status) ));
2558                 return status;
2559         }
2560
2561         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2562                 return map_nt_error_from_unix(errno);
2563         }
2564
2565         /* Ensure we're checking for a symlink here.... */
2566         /* We don't want to get caught by a symlink racer. */
2567
2568         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2569                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2570                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2571                 return map_nt_error_from_unix(errno);
2572         }
2573
2574         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2575                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2576                           smb_fname_str_dbg(smb_dname)));
2577                 return NT_STATUS_NOT_A_DIRECTORY;
2578         }
2579
2580         if (lp_store_dos_attributes(SNUM(conn))) {
2581                 if (!posix_open) {
2582                         file_set_dosmode(conn, smb_dname,
2583                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2584                                          parent_dir, true);
2585                 }
2586         }
2587
2588         if (lp_inherit_perms(SNUM(conn))) {
2589                 inherit_access_posix_acl(conn, parent_dir,
2590                                          smb_dname->base_name, mode);
2591                 need_re_stat = true;
2592         }
2593
2594         if (!posix_open) {
2595                 /*
2596                  * Check if high bits should have been set,
2597                  * then (if bits are missing): add them.
2598                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2599                  * dir.
2600                  */
2601                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2602                     (mode & ~smb_dname->st.st_ex_mode)) {
2603                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2604                                       (smb_dname->st.st_ex_mode |
2605                                           (mode & ~smb_dname->st.st_ex_mode)));
2606                         need_re_stat = true;
2607                 }
2608         }
2609
2610         /* Change the owner if required. */
2611         if (lp_inherit_owner(SNUM(conn))) {
2612                 change_dir_owner_to_parent(conn, parent_dir,
2613                                            smb_dname->base_name,
2614                                            &smb_dname->st);
2615                 need_re_stat = true;
2616         }
2617
2618         if (need_re_stat) {
2619                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2620                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2621                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2622                         return map_nt_error_from_unix(errno);
2623                 }
2624         }
2625
2626         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2627                      smb_dname->base_name);
2628
2629         return NT_STATUS_OK;
2630 }
2631
2632 /****************************************************************************
2633  Ensure we didn't get symlink raced on opening a directory.
2634 ****************************************************************************/
2635
2636 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2637                         const SMB_STRUCT_STAT *sbuf2)
2638 {
2639         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2640                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2641                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2642                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2643                 return false;
2644         }
2645         return true;
2646 }
2647
2648 /****************************************************************************
2649  Open a directory from an NT SMB call.
2650 ****************************************************************************/
2651
2652 static NTSTATUS open_directory(connection_struct *conn,
2653                                struct smb_request *req,
2654                                struct smb_filename *smb_dname,
2655                                uint32 access_mask,
2656                                uint32 share_access,
2657                                uint32 create_disposition,
2658                                uint32 create_options,
2659                                uint32 file_attributes,
2660                                int *pinfo,
2661                                files_struct **result)
2662 {
2663         files_struct *fsp = NULL;
2664         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2665         struct share_mode_lock *lck = NULL;
2666         NTSTATUS status;
2667         struct timespec mtimespec;
2668         int info = 0;
2669
2670         if (is_ntfs_stream_smb_fname(smb_dname)) {
2671                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2672                           smb_fname_str_dbg(smb_dname)));
2673                 return NT_STATUS_NOT_A_DIRECTORY;
2674         }
2675
2676         /* Ensure we have a directory attribute. */
2677         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2678
2679         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2680                  "share_access = 0x%x create_options = 0x%x, "
2681                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2682                  smb_fname_str_dbg(smb_dname),
2683                  (unsigned int)access_mask,
2684                  (unsigned int)share_access,
2685                  (unsigned int)create_options,
2686                  (unsigned int)create_disposition,
2687                  (unsigned int)file_attributes));
2688
2689         status = smbd_calculate_access_mask(conn, smb_dname,
2690                                             access_mask, &access_mask);
2691         if (!NT_STATUS_IS_OK(status)) {
2692                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2693                         "on file %s returned %s\n",
2694                         smb_fname_str_dbg(smb_dname),
2695                         nt_errstr(status)));
2696                 return status;
2697         }
2698
2699         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2700                         !security_token_has_privilege(get_current_nttok(conn),
2701                                         SEC_PRIV_SECURITY)) {
2702                 DEBUG(10, ("open_directory: open on %s "
2703                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2704                         smb_fname_str_dbg(smb_dname)));
2705                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2706         }
2707
2708         switch( create_disposition ) {
2709                 case FILE_OPEN:
2710
2711                         if (!dir_existed) {
2712                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2713                         }
2714
2715                         info = FILE_WAS_OPENED;
2716                         break;
2717
2718                 case FILE_CREATE:
2719
2720                         /* If directory exists error. If directory doesn't
2721                          * exist create. */
2722
2723                         if (dir_existed) {
2724                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2725                                 DEBUG(2, ("open_directory: unable to create "
2726                                           "%s. Error was %s\n",
2727                                           smb_fname_str_dbg(smb_dname),
2728                                           nt_errstr(status)));
2729                                 return status;
2730                         }
2731
2732                         status = mkdir_internal(conn, smb_dname,
2733                                                 file_attributes);
2734
2735                         if (!NT_STATUS_IS_OK(status)) {
2736                                 DEBUG(2, ("open_directory: unable to create "
2737                                           "%s. Error was %s\n",
2738                                           smb_fname_str_dbg(smb_dname),
2739                                           nt_errstr(status)));
2740                                 return status;
2741                         }
2742
2743                         info = FILE_WAS_CREATED;
2744                         break;
2745
2746                 case FILE_OPEN_IF:
2747                         /*
2748                          * If directory exists open. If directory doesn't
2749                          * exist create.
2750                          */
2751
2752                         if (dir_existed) {
2753                                 status = NT_STATUS_OK;
2754                                 info = FILE_WAS_OPENED;
2755                         } else {
2756                                 status = mkdir_internal(conn, smb_dname,
2757                                                 file_attributes);
2758
2759                                 if (NT_STATUS_IS_OK(status)) {
2760                                         info = FILE_WAS_CREATED;
2761                                 } else {
2762                                         /* Cope with create race. */
2763                                         if (!NT_STATUS_EQUAL(status,
2764                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2765                                                 DEBUG(2, ("open_directory: unable to create "
2766                                                         "%s. Error was %s\n",
2767                                                         smb_fname_str_dbg(smb_dname),
2768                                                         nt_errstr(status)));
2769                                                 return status;
2770                                         }
2771                                         info = FILE_WAS_OPENED;
2772                                 }
2773                         }
2774
2775                         break;
2776
2777                 case FILE_SUPERSEDE:
2778                 case FILE_OVERWRITE:
2779                 case FILE_OVERWRITE_IF:
2780                 default:
2781                         DEBUG(5,("open_directory: invalid create_disposition "
2782                                  "0x%x for directory %s\n",
2783                                  (unsigned int)create_disposition,
2784                                  smb_fname_str_dbg(smb_dname)));
2785                         return NT_STATUS_INVALID_PARAMETER;
2786         }
2787
2788         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2789                 DEBUG(5,("open_directory: %s is not a directory !\n",
2790                          smb_fname_str_dbg(smb_dname)));
2791                 return NT_STATUS_NOT_A_DIRECTORY;
2792         }
2793
2794         if (info == FILE_WAS_OPENED) {
2795                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2796                 if (!NT_STATUS_IS_OK(status)) {
2797                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2798                                 "file %s failed with %s\n",
2799                                 smb_fname_str_dbg(smb_dname),
2800                                 nt_errstr(status)));
2801                         return status;
2802                 }
2803         }
2804
2805         status = file_new(req, conn, &fsp);
2806         if(!NT_STATUS_IS_OK(status)) {
2807                 return status;
2808         }
2809
2810         /*
2811          * Setup the files_struct for it.
2812          */
2813
2814         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2815         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2816         fsp->file_pid = req ? req->smbpid : 0;
2817         fsp->can_lock = False;
2818         fsp->can_read = False;
2819         fsp->can_write = False;
2820
2821         fsp->share_access = share_access;
2822         fsp->fh->private_options = 0;
2823         /*
2824          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2825          */
2826         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2827         fsp->print_file = NULL;
2828         fsp->modified = False;
2829         fsp->oplock_type = NO_OPLOCK;
2830         fsp->sent_oplock_break = NO_BREAK_SENT;
2831         fsp->is_directory = True;
2832         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2833         status = fsp_set_smb_fname(fsp, smb_dname);
2834         if (!NT_STATUS_IS_OK(status)) {
2835                 file_free(req, fsp);
2836                 return status;
2837         }
2838
2839         mtimespec = smb_dname->st.st_ex_mtime;
2840
2841 #ifdef O_DIRECTORY
2842         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2843 #else
2844         /* POSIX allows us to open a directory with O_RDONLY. */
2845         status = fd_open(conn, fsp, O_RDONLY, 0);
2846 #endif
2847         if (!NT_STATUS_IS_OK(status)) {
2848                 DEBUG(5, ("open_directory: Could not open fd for "
2849                         "%s (%s)\n",
2850                         smb_fname_str_dbg(smb_dname),
2851                         nt_errstr(status)));
2852                 file_free(req, fsp);
2853                 return status;
2854         }
2855
2856         status = vfs_stat_fsp(fsp);
2857         if (!NT_STATUS_IS_OK(status)) {
2858                 fd_close(fsp);
2859                 file_free(req, fsp);
2860                 return status;
2861         }
2862
2863         /* Ensure there was no race condition. */
2864         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2865                 DEBUG(5,("open_directory: stat struct differs for "
2866                         "directory %s.\n",
2867                         smb_fname_str_dbg(smb_dname)));
2868                 fd_close(fsp);
2869                 file_free(req, fsp);
2870                 return NT_STATUS_ACCESS_DENIED;
2871         }
2872
2873         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2874                                   conn->connectpath, smb_dname,
2875                                   &mtimespec);
2876
2877         if (lck == NULL) {
2878                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2879                           "%s\n", smb_fname_str_dbg(smb_dname)));
2880                 fd_close(fsp);
2881                 file_free(req, fsp);
2882                 return NT_STATUS_SHARING_VIOLATION;
2883         }
2884
2885         status = open_mode_check(conn, lck, fsp->name_hash,
2886                                 access_mask, share_access,
2887                                  create_options, &dir_existed);
2888
2889         if (!NT_STATUS_IS_OK(status)) {
2890                 TALLOC_FREE(lck);
2891                 fd_close(fsp);
2892                 file_free(req, fsp);
2893                 return status;
2894         }
2895
2896         set_share_mode(lck, fsp, get_current_uid(conn),
2897                         req ? req->mid : 0, NO_OPLOCK);
2898
2899         /* For directories the delete on close bit at open time seems
2900            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2901         if (create_options & FILE_DELETE_ON_CLOSE) {
2902                 status = can_set_delete_on_close(fsp, 0);
2903                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2904                         TALLOC_FREE(lck);
2905                         fd_close(fsp);
2906                         file_free(req, fsp);
2907                         return status;
2908                 }
2909
2910                 if (NT_STATUS_IS_OK(status)) {
2911                         /* Note that here we set the *inital* delete on close flag,
2912                            not the regular one. The magic gets handled in close. */
2913                         fsp->initial_delete_on_close = True;
2914                 }
2915         }
2916
2917         TALLOC_FREE(lck);
2918
2919         if (pinfo) {
2920                 *pinfo = info;
2921         }
2922
2923         *result = fsp;
2924         return NT_STATUS_OK;
2925 }
2926
2927 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2928                           struct smb_filename *smb_dname)
2929 {
2930         NTSTATUS status;
2931         files_struct *fsp;
2932
2933         status = SMB_VFS_CREATE_FILE(
2934                 conn,                                   /* conn */
2935                 req,                                    /* req */
2936                 0,                                      /* root_dir_fid */
2937                 smb_dname,                              /* fname */
2938                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2939                 FILE_SHARE_NONE,                        /* share_access */
2940                 FILE_CREATE,                            /* create_disposition*/
2941                 FILE_DIRECTORY_FILE,                    /* create_options */
2942                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
2943                 0,                                      /* oplock_request */
2944                 0,                                      /* allocation_size */
2945                 0,                                      /* private_flags */
2946                 NULL,                                   /* sd */
2947                 NULL,                                   /* ea_list */
2948                 &fsp,                                   /* result */
2949                 NULL);                                  /* pinfo */
2950
2951         if (NT_STATUS_IS_OK(status)) {
2952                 close_file(req, fsp, NORMAL_CLOSE);
2953         }
2954
2955         return status;
2956 }
2957
2958 /****************************************************************************
2959  Receive notification that one of our open files has been renamed by another
2960  smbd process.
2961 ****************************************************************************/
2962
2963 void msg_file_was_renamed(struct messaging_context *msg,
2964                           void *private_data,
2965                           uint32_t msg_type,
2966                           struct server_id server_id,
2967                           DATA_BLOB *data)
2968 {
2969         files_struct *fsp;
2970         char *frm = (char *)data->data;
2971         struct file_id id;
2972         const char *sharepath;
2973         const char *base_name;
2974         const char *stream_name;
2975         struct smb_filename *smb_fname = NULL;
2976         size_t sp_len, bn_len;
2977         NTSTATUS status;
2978         struct smbd_server_connection *sconn =
2979                 talloc_get_type_abort(private_data,
2980                 struct smbd_server_connection);
2981
2982         if (data->data == NULL
2983             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2984                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2985                           (int)data->length));
2986                 return;
2987         }
2988
2989         /* Unpack the message. */
2990         pull_file_id_24(frm, &id);
2991         sharepath = &frm[24];
2992         sp_len = strlen(sharepath);
2993         base_name = sharepath + sp_len + 1;
2994         bn_len = strlen(base_name);
2995         stream_name = sharepath + sp_len + 1 + bn_len + 1;
2996
2997         /* stream_name must always be NULL if there is no stream. */
2998         if (stream_name[0] == '\0') {
2999                 stream_name = NULL;
3000         }
3001
3002         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3003                                             stream_name, NULL, &smb_fname);
3004         if (!NT_STATUS_IS_OK(status)) {
3005                 return;
3006         }
3007
3008         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3009                 "file_id %s\n",
3010                 sharepath, smb_fname_str_dbg(smb_fname),
3011                 file_id_string_tos(&id)));
3012
3013         for(fsp = file_find_di_first(sconn, id); fsp;
3014             fsp = file_find_di_next(fsp)) {
3015                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3016
3017                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3018                                 fsp->fnum, fsp_str_dbg(fsp),
3019                                 smb_fname_str_dbg(smb_fname)));
3020                         status = fsp_set_smb_fname(fsp, smb_fname);
3021                         if (!NT_STATUS_IS_OK(status)) {
3022                                 goto out;
3023                         }
3024                 } else {
3025                         /* TODO. JRA. */
3026                         /* Now we have the complete path we can work out if this is
3027                            actually within this share and adjust newname accordingly. */
3028                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3029                                 "not sharepath %s) "
3030                                 "fnum %d from %s -> %s\n",
3031                                 fsp->conn->connectpath,
3032                                 sharepath,
3033                                 fsp->fnum,
3034                                 fsp_str_dbg(fsp),
3035                                 smb_fname_str_dbg(smb_fname)));
3036                 }
3037         }
3038  out:
3039         TALLOC_FREE(smb_fname);
3040         return;
3041 }
3042
3043 /*
3044  * If a main file is opened for delete, all streams need to be checked for
3045  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3046  * If that works, delete them all by setting the delete on close and close.
3047  */
3048
3049 NTSTATUS open_streams_for_delete(connection_struct *conn,
3050                                         const char *fname)
3051 {
3052         struct stream_struct *stream_info = NULL;
3053         files_struct **streams = NULL;
3054         int i;
3055         unsigned int num_streams = 0;
3056         TALLOC_CTX *frame = talloc_stackframe();
3057         NTSTATUS status;
3058
3059         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3060                                 &num_streams, &stream_info);
3061
3062         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3063             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3064                 DEBUG(10, ("no streams around\n"));
3065                 TALLOC_FREE(frame);
3066                 return NT_STATUS_OK;
3067         }
3068
3069         if (!NT_STATUS_IS_OK(status)) {
3070                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3071                            nt_errstr(status)));
3072                 goto fail;
3073         }
3074
3075         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3076                    num_streams));
3077
3078         if (num_streams == 0) {
3079                 TALLOC_FREE(frame);
3080                 return NT_STATUS_OK;
3081         }
3082
3083         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3084         if (streams == NULL) {
3085                 DEBUG(0, ("talloc failed\n"));
3086                 status = NT_STATUS_NO_MEMORY;
3087                 goto fail;
3088         }
3089
3090         for (i=0; i<num_streams; i++) {
3091                 struct smb_filename *smb_fname = NULL;
3092
3093                 if (strequal(stream_info[i].name, "::$DATA")) {
3094                         streams[i] = NULL;
3095                         continue;
3096                 }
3097
3098                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3099                                                     stream_info[i].name,
3100                                                     NULL, &smb_fname);
3101                 if (!NT_STATUS_IS_OK(status)) {
3102                         goto fail;
3103                 }
3104
3105                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3106                         DEBUG(10, ("Unable to stat stream: %s\n",
3107                                    smb_fname_str_dbg(smb_fname)));
3108                 }
3109
3110                 status = SMB_VFS_CREATE_FILE(
3111                          conn,                  /* conn */
3112                          NULL,                  /* req */
3113                          0,                     /* root_dir_fid */
3114                          smb_fname,             /* fname */
3115                          DELETE_ACCESS,         /* access_mask */
3116                          (FILE_SHARE_READ |     /* share_access */
3117                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3118                          FILE_OPEN,             /* create_disposition*/
3119                          0,                     /* create_options */
3120                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3121                          0,                     /* oplock_request */
3122                          0,                     /* allocation_size */
3123                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3124                          NULL,                  /* sd */
3125                          NULL,                  /* ea_list */
3126                          &streams[i],           /* result */
3127                          NULL);                 /* pinfo */
3128
3129                 if (!NT_STATUS_IS_OK(status)) {
3130                         DEBUG(10, ("Could not open stream %s: %s\n",
3131                                    smb_fname_str_dbg(smb_fname),
3132                                    nt_errstr(status)));
3133
3134                         TALLOC_FREE(smb_fname);
3135                         break;
3136                 }
3137                 TALLOC_FREE(smb_fname);
3138         }
3139
3140         /*
3141          * don't touch the variable "status" beyond this point :-)
3142          */
3143
3144         for (i -= 1 ; i >= 0; i--) {
3145                 if (streams[i] == NULL) {
3146                         continue;
3147                 }
3148
3149                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3150                            fsp_str_dbg(streams[i])));
3151                 close_file(NULL, streams[i], NORMAL_CLOSE);
3152         }
3153
3154  fail:
3155         TALLOC_FREE(frame);
3156         return status;
3157 }
3158
3159 /*********************************************************************
3160  Create a default ACL by inheriting from the parent. If no inheritance
3161  from the parent available, don't set anything. This will leave the actual
3162  permissions the new file or directory already got from the filesystem
3163  as the NT ACL when read.
3164 *********************************************************************/
3165
3166 static NTSTATUS inherit_new_acl(files_struct *fsp)
3167 {
3168         TALLOC_CTX *ctx = talloc_tos();
3169         char *parent_name = NULL;
3170         struct security_descriptor *parent_desc = NULL;
3171         NTSTATUS status = NT_STATUS_OK;
3172         struct security_descriptor *psd = NULL;
3173         struct dom_sid *owner_sid = NULL;
3174         struct dom_sid *group_sid = NULL;
3175         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3176         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3177         bool inheritable_components = false;
3178         size_t size = 0;
3179
3180         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3181                 return NT_STATUS_NO_MEMORY;
3182         }
3183
3184         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3185                                 parent_name,
3186                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3187                                 &parent_desc);
3188         if (!NT_STATUS_IS_OK(status)) {
3189                 return status;
3190         }
3191
3192         inheritable_components = sd_has_inheritable_components(parent_desc,
3193                                         fsp->is_directory);
3194
3195         if (!inheritable_components && !inherit_owner) {
3196                 /* Nothing to inherit and not setting owner. */
3197                 return NT_STATUS_OK;
3198         }
3199
3200         /* Create an inherited descriptor from the parent. */
3201
3202         if (DEBUGLEVEL >= 10) {
3203                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3204                         fsp_str_dbg(fsp) ));
3205                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3206         }
3207
3208         /* Inherit from parent descriptor if "inherit owner" set. */
3209         if (inherit_owner) {
3210                 owner_sid = parent_desc->owner_sid;
3211                 group_sid = parent_desc->group_sid;
3212         }
3213
3214         if (owner_sid == NULL) {
3215                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3216         }
3217         if (group_sid == NULL) {
3218                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3219         }
3220
3221         status = se_create_child_secdesc(ctx,
3222                         &psd,
3223                         &size,
3224                         parent_desc,
3225                         owner_sid,
3226                         group_sid,
3227                         fsp->is_directory);
3228         if (!NT_STATUS_IS_OK(status)) {
3229                 return status;
3230         }
3231
3232         /* If inheritable_components == false,
3233            se_create_child_secdesc()
3234            creates a security desriptor with a NULL dacl
3235            entry, but with SEC_DESC_DACL_PRESENT. We need
3236            to remove that flag. */
3237
3238         if (!inheritable_components) {
3239                 security_info_sent &= ~SECINFO_DACL;
3240                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3241         }
3242
3243         if (DEBUGLEVEL >= 10) {
3244                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3245                         fsp_str_dbg(fsp) ));
3246                 NDR_PRINT_DEBUG(security_descriptor, psd);
3247         }
3248
3249         if (inherit_owner) {
3250                 /* We need to be root to force this. */
3251                 become_root();
3252         }
3253         status = SMB_VFS_FSET_NT_ACL(fsp,
3254                         security_info_sent,
3255                         psd);
3256         if (inherit_owner) {
3257                 unbecome_root();
3258         }
3259         return status;
3260 }
3261
3262 /*
3263  * Wrapper around open_file_ntcreate and open_directory
3264  */
3265
3266 static NTSTATUS create_file_unixpath(connection_struct *conn,
3267                                      struct smb_request *req,
3268                                      struct smb_filename *smb_fname,
3269                                      uint32_t access_mask,
3270                                      uint32_t share_access,
3271                                      uint32_t create_disposition,
3272                                      uint32_t create_options,
3273                                      uint32_t file_attributes,
3274                                      uint32_t oplock_request,
3275                                      uint64_t allocation_size,
3276                                      uint32_t private_flags,
3277                                      struct security_descriptor *sd,
3278                                      struct ea_list *ea_list,
3279
3280                                      files_struct **result,
3281                                      int *pinfo)
3282 {
3283         int info = FILE_WAS_OPENED;
3284         files_struct *base_fsp = NULL;
3285         files_struct *fsp = NULL;
3286         NTSTATUS status;
3287
3288         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3289                   "file_attributes = 0x%x, share_access = 0x%x, "
3290                   "create_disposition = 0x%x create_options = 0x%x "
3291                   "oplock_request = 0x%x private_flags = 0x%x "
3292                   "ea_list = 0x%p, sd = 0x%p, "
3293                   "fname = %s\n",
3294                   (unsigned int)access_mask,
3295                   (unsigned int)file_attributes,
3296                   (unsigned int)share_access,
3297                   (unsigned int)create_disposition,
3298                   (unsigned int)create_options,
3299                   (unsigned int)oplock_request,
3300                   (unsigned int)private_flags,
3301                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3302
3303         if (create_options & FILE_OPEN_BY_FILE_ID) {
3304                 status = NT_STATUS_NOT_SUPPORTED;
3305                 goto fail;
3306         }
3307
3308         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3309                 status = NT_STATUS_INVALID_PARAMETER;
3310                 goto fail;
3311         }
3312
3313         if (req == NULL) {
3314                 oplock_request |= INTERNAL_OPEN_ONLY;
3315         }
3316
3317         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3318             && (access_mask & DELETE_ACCESS)
3319             && !is_ntfs_stream_smb_fname(smb_fname)) {
3320                 /*
3321                  * We can't open a file with DELETE access if any of the
3322                  * streams is open without FILE_SHARE_DELETE
3323                  */
3324                 status = open_streams_for_delete(conn, smb_fname->base_name);
3325
3326                 if (!NT_STATUS_IS_OK(status)) {
3327                         goto fail;
3328                 }
3329         }
3330
3331         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3332                         !security_token_has_privilege(get_current_nttok(conn),
3333                                         SEC_PRIV_SECURITY)) {
3334                 DEBUG(10, ("create_file_unixpath: open on %s "
3335                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3336                         smb_fname_str_dbg(smb_fname)));
3337                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3338                 goto fail;
3339         }
3340
3341         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3342             && is_ntfs_stream_smb_fname(smb_fname)
3343             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3344                 uint32 base_create_disposition;
3345                 struct smb_filename *smb_fname_base = NULL;
3346
3347                 if (create_options & FILE_DIRECTORY_FILE) {
3348                         status = NT_STATUS_NOT_A_DIRECTORY;
3349                         goto fail;
3350                 }
3351
3352                 switch (create_disposition) {
3353                 case FILE_OPEN:
3354                         base_create_disposition = FILE_OPEN;
3355                         break;
3356                 default:
3357                         base_create_disposition = FILE_OPEN_IF;
3358                         break;
3359                 }
3360
3361                 /* Create an smb_filename with stream_name == NULL. */
3362                 status = create_synthetic_smb_fname(talloc_tos(),
3363                                                     smb_fname->base_name,
3364                                                     NULL, NULL,
3365                                                     &smb_fname_base);
3366                 if (!NT_STATUS_IS_OK(status)) {
3367                         goto fail;
3368                 }
3369
3370                 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3371                         DEBUG(10, ("Unable to stat stream: %s\n",
3372                                    smb_fname_str_dbg(smb_fname_base)));
3373                 }
3374
3375                 /* Open the base file. */
3376                 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3377                                               FILE_SHARE_READ
3378                                               | FILE_SHARE_WRITE
3379                                               | FILE_SHARE_DELETE,
3380                                               base_create_disposition,
3381                                               0, 0, 0, 0, 0, NULL, NULL,
3382                                               &base_fsp, NULL);
3383                 TALLOC_FREE(smb_fname_base);
3384
3385                 if (!NT_STATUS_IS_OK(status)) {
3386                         DEBUG(10, ("create_file_unixpath for base %s failed: "
3387                                    "%s\n", smb_fname->base_name,
3388                                    nt_errstr(status)));
3389                         goto fail;
3390                 }
3391                 /* we don't need to low level fd */
3392                 fd_close(base_fsp);
3393         }
3394
3395         /*
3396          * If it's a request for a directory open, deal with it separately.
3397          */
3398
3399         if (create_options & FILE_DIRECTORY_FILE) {
3400
3401                 if (create_options & FILE_NON_DIRECTORY_FILE) {
3402                         status = NT_STATUS_INVALID_PARAMETER;
3403                         goto fail;
3404                 }
3405
3406                 /* Can't open a temp directory. IFS kit test. */
3407                 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3408                      (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3409                         status = NT_STATUS_INVALID_PARAMETER;
3410                         goto fail;
3411                 }
3412
3413                 /*
3414                  * We will get a create directory here if the Win32
3415                  * app specified a security descriptor in the
3416                  * CreateDirectory() call.
3417                  */
3418
3419                 oplock_request = 0;
3420                 status = open_directory(
3421                         conn, req, smb_fname, access_mask, share_access,
3422                         create_disposition, create_options, file_attributes,
3423                         &info, &fsp);
3424         } else {
3425
3426                 /*
3427                  * Ordinary file case.
3428                  */
3429
3430                 status = file_new(req, conn, &fsp);
3431                 if(!NT_STATUS_IS_OK(status)) {
3432                         goto fail;
3433                 }
3434
3435                 status = fsp_set_smb_fname(fsp, smb_fname);