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