Change the S3 fileserver over to se_file_access_check().
[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         bool async_open;
39         struct file_id id;
40 };
41
42 /****************************************************************************
43  If the requester wanted DELETE_ACCESS and was rejected because
44  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
45  overrides this.
46 ****************************************************************************/
47
48 static bool parent_override_delete(connection_struct *conn,
49                                         const struct smb_filename *smb_fname,
50                                         uint32_t access_mask,
51                                         uint32_t rejected_mask)
52 {
53         if ((access_mask & DELETE_ACCESS) &&
54                     (rejected_mask & DELETE_ACCESS) &&
55                     can_delete_file_in_directory(conn, smb_fname)) {
56                 return true;
57         }
58         return false;
59 }
60
61 /****************************************************************************
62  Check if we have open rights.
63 ****************************************************************************/
64
65 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
66                                 const struct smb_filename *smb_fname,
67                                 uint32_t access_mask)
68 {
69         /* Check if we have rights to open. */
70         NTSTATUS status;
71         struct security_descriptor *sd = NULL;
72         uint32_t rejected_share_access;
73         uint32_t rejected_mask = access_mask;
74
75         rejected_share_access = access_mask & ~(conn->share_access);
76
77         if (rejected_share_access) {
78                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
79                         "on %s (0x%x)\n",
80                         (unsigned int)access_mask,
81                         smb_fname_str_dbg(smb_fname),
82                         (unsigned int)rejected_share_access ));
83                 return NT_STATUS_ACCESS_DENIED;
84         }
85
86         if (get_current_uid(conn) == (uid_t)0) {
87                 /* I'm sorry sir, I didn't know you were root... */
88                 DEBUG(10,("smbd_check_access_rights: root override "
89                         "on %s. Granting 0x%x\n",
90                         smb_fname_str_dbg(smb_fname),
91                         (unsigned int)access_mask ));
92                 return NT_STATUS_OK;
93         }
94
95         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
96                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
97                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
98                         smb_fname_str_dbg(smb_fname),
99                         (unsigned int)access_mask ));
100                 return NT_STATUS_OK;
101         }
102
103         if (access_mask == DELETE_ACCESS &&
104                         VALID_STAT(smb_fname->st) &&
105                         S_ISLNK(smb_fname->st.st_ex_mode)) {
106                 /* We can always delete a symlink. */
107                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
108                         "on DELETE_ACCESS on symlink %s.\n",
109                         smb_fname_str_dbg(smb_fname) ));
110                 return NT_STATUS_OK;
111         }
112
113         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
114                         (SECINFO_OWNER |
115                         SECINFO_GROUP |
116                         SECINFO_DACL),&sd);
117
118         if (!NT_STATUS_IS_OK(status)) {
119                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
120                         "on %s: %s\n",
121                         smb_fname_str_dbg(smb_fname),
122                         nt_errstr(status)));
123
124                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
125                         goto access_denied;
126                 }
127
128                 return status;
129         }
130
131         /*
132          * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
133          * owner WRITE_DAC and READ_CONTROL.
134          */
135         status = se_file_access_check(sd,
136                                 get_current_nttok(conn),
137                                 false,
138                                 (access_mask & ~FILE_READ_ATTRIBUTES),
139                                 &rejected_mask);
140
141         DEBUG(10,("smbd_check_access_rights: file %s requesting "
142                 "0x%x returning 0x%x (%s)\n",
143                 smb_fname_str_dbg(smb_fname),
144                 (unsigned int)access_mask,
145                 (unsigned int)rejected_mask,
146                 nt_errstr(status) ));
147
148         if (!NT_STATUS_IS_OK(status)) {
149                 if (DEBUGLEVEL >= 10) {
150                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
151                                 smb_fname_str_dbg(smb_fname) ));
152                         NDR_PRINT_DEBUG(security_descriptor, sd);
153                 }
154         }
155
156         TALLOC_FREE(sd);
157
158         if (NT_STATUS_IS_OK(status) ||
159                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
160                 return status;
161         }
162
163         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
164
165   access_denied:
166
167         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
168                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
169                         !lp_store_dos_attributes(SNUM(conn)) &&
170                         (lp_map_readonly(SNUM(conn)) ||
171                         lp_map_archive(SNUM(conn)) ||
172                         lp_map_hidden(SNUM(conn)) ||
173                         lp_map_system(SNUM(conn)))) {
174                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
175
176                 DEBUG(10,("smbd_check_access_rights: "
177                         "overrode "
178                         "FILE_WRITE_ATTRIBUTES "
179                         "on file %s\n",
180                         smb_fname_str_dbg(smb_fname)));
181         }
182
183         if (parent_override_delete(conn,
184                                 smb_fname,
185                                 access_mask,
186                                 rejected_mask)) {
187                 /* Were we trying to do an open
188                  * for delete and didn't get DELETE
189                  * access (only) ? Check if the
190                  * directory allows DELETE_CHILD.
191                  * See here:
192                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
193                  * for details. */
194
195                 rejected_mask &= ~DELETE_ACCESS;
196
197                 DEBUG(10,("smbd_check_access_rights: "
198                         "overrode "
199                         "DELETE_ACCESS on "
200                         "file %s\n",
201                         smb_fname_str_dbg(smb_fname)));
202         }
203
204         if (rejected_mask != 0) {
205                 return NT_STATUS_ACCESS_DENIED;
206         }
207         return NT_STATUS_OK;
208 }
209
210 static NTSTATUS check_parent_access(struct connection_struct *conn,
211                                 struct smb_filename *smb_fname,
212                                 uint32_t access_mask)
213 {
214         NTSTATUS status;
215         char *parent_dir = NULL;
216         struct security_descriptor *parent_sd = NULL;
217         uint32_t access_granted = 0;
218
219         if (!parent_dirname(talloc_tos(),
220                                 smb_fname->base_name,
221                                 &parent_dir,
222                                 NULL)) {
223                 return NT_STATUS_NO_MEMORY;
224         }
225
226         if (get_current_uid(conn) == (uid_t)0) {
227                 /* I'm sorry sir, I didn't know you were root... */
228                 DEBUG(10,("check_parent_access: root override "
229                         "on %s. Granting 0x%x\n",
230                         smb_fname_str_dbg(smb_fname),
231                         (unsigned int)access_mask ));
232                 return NT_STATUS_OK;
233         }
234
235         status = SMB_VFS_GET_NT_ACL(conn,
236                                 parent_dir,
237                                 SECINFO_DACL,
238                                 &parent_sd);
239
240         if (!NT_STATUS_IS_OK(status)) {
241                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
242                         "%s with error %s\n",
243                         parent_dir,
244                         nt_errstr(status)));
245                 return status;
246         }
247
248         /*
249          * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
250          * owner WRITE_DAC and READ_CONTROL.
251          */
252         status = se_file_access_check(parent_sd,
253                                 get_current_nttok(conn),
254                                 false,
255                                 (access_mask & ~FILE_READ_ATTRIBUTES),
256                                 &access_granted);
257         if(!NT_STATUS_IS_OK(status)) {
258                 DEBUG(5,("check_parent_access: access check "
259                         "on directory %s for "
260                         "path %s for mask 0x%x returned (0x%x) %s\n",
261                         parent_dir,
262                         smb_fname->base_name,
263                         access_mask,
264                         access_granted,
265                         nt_errstr(status) ));
266                 return status;
267         }
268
269         return NT_STATUS_OK;
270 }
271
272 /****************************************************************************
273  fd support routines - attempt to do a dos_open.
274 ****************************************************************************/
275
276 static NTSTATUS fd_open(struct connection_struct *conn,
277                     files_struct *fsp,
278                     int flags,
279                     mode_t mode)
280 {
281         struct smb_filename *smb_fname = fsp->fsp_name;
282         NTSTATUS status = NT_STATUS_OK;
283
284 #ifdef O_NOFOLLOW
285         /* 
286          * Never follow symlinks on a POSIX client. The
287          * client should be doing this.
288          */
289
290         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
291                 flags |= O_NOFOLLOW;
292         }
293 #endif
294
295         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
296         if (fsp->fh->fd == -1) {
297                 int posix_errno = errno;
298 #ifdef O_NOFOLLOW
299 #if defined(ENOTSUP) && defined(OSF1)
300                 /* handle special Tru64 errno */
301                 if (errno == ENOTSUP) {
302                         posix_errno = ELOOP;
303                 }
304 #endif /* ENOTSUP */
305 #ifdef EFTYPE
306                 /* fix broken NetBSD errno */
307                 if (errno == EFTYPE) {
308                         posix_errno = ELOOP;
309                 }
310 #endif /* EFTYPE */
311                 /* fix broken FreeBSD errno */
312                 if (errno == EMLINK) {
313                         posix_errno = ELOOP;
314                 }
315 #endif /* O_NOFOLLOW */
316                 status = map_nt_error_from_unix(posix_errno);
317                 if (errno == EMFILE) {
318                         static time_t last_warned = 0L;
319
320                         if (time((time_t *) NULL) > last_warned) {
321                                 DEBUG(0,("Too many open files, unable "
322                                         "to open more!  smbd's max "
323                                         "open files = %d\n",
324                                         lp_max_open_files()));
325                                 last_warned = time((time_t *) NULL);
326                         }
327                 }
328
329         }
330
331         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
332                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
333                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
334
335         return status;
336 }
337
338 /****************************************************************************
339  Close the file associated with a fsp.
340 ****************************************************************************/
341
342 NTSTATUS fd_close(files_struct *fsp)
343 {
344         int ret;
345
346         if (fsp->dptr) {
347                 dptr_CloseDir(fsp);
348         }
349         if (fsp->fh->fd == -1) {
350                 return NT_STATUS_OK; /* What we used to call a stat open. */
351         }
352         if (fsp->fh->ref_count > 1) {
353                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
354         }
355
356         ret = SMB_VFS_CLOSE(fsp);
357         fsp->fh->fd = -1;
358         if (ret == -1) {
359                 return map_nt_error_from_unix(errno);
360         }
361         return NT_STATUS_OK;
362 }
363
364 /****************************************************************************
365  Change the ownership of a file to that of the parent directory.
366  Do this by fd if possible.
367 ****************************************************************************/
368
369 void change_file_owner_to_parent(connection_struct *conn,
370                                         const char *inherit_from_dir,
371                                         files_struct *fsp)
372 {
373         struct smb_filename *smb_fname_parent = NULL;
374         NTSTATUS status;
375         int ret;
376
377         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
378                                             NULL, NULL, &smb_fname_parent);
379         if (!NT_STATUS_IS_OK(status)) {
380                 return;
381         }
382
383         ret = SMB_VFS_STAT(conn, smb_fname_parent);
384         if (ret == -1) {
385                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
386                          "directory %s. Error was %s\n",
387                          smb_fname_str_dbg(smb_fname_parent),
388                          strerror(errno)));
389                 TALLOC_FREE(smb_fname_parent);
390                 return;
391         }
392
393         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
394                 /* Already this uid - no need to change. */
395                 DEBUG(10,("change_file_owner_to_parent: file %s "
396                         "is already owned by uid %d\n",
397                         fsp_str_dbg(fsp),
398                         (int)fsp->fsp_name->st.st_ex_uid ));
399                 TALLOC_FREE(smb_fname_parent);
400                 return;
401         }
402
403         become_root();
404         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
405         unbecome_root();
406         if (ret == -1) {
407                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
408                          "file %s to parent directory uid %u. Error "
409                          "was %s\n", fsp_str_dbg(fsp),
410                          (unsigned int)smb_fname_parent->st.st_ex_uid,
411                          strerror(errno) ));
412         } else {
413                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
414                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
415                         (unsigned int)smb_fname_parent->st.st_ex_uid));
416                 /* Ensure the uid entry is updated. */
417                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
418         }
419
420         TALLOC_FREE(smb_fname_parent);
421 }
422
423 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
424                                        const char *inherit_from_dir,
425                                        const char *fname,
426                                        SMB_STRUCT_STAT *psbuf)
427 {
428         struct smb_filename *smb_fname_parent = NULL;
429         struct smb_filename *smb_fname_cwd = NULL;
430         char *saved_dir = NULL;
431         TALLOC_CTX *ctx = talloc_tos();
432         NTSTATUS status = NT_STATUS_OK;
433         int ret;
434
435         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
436                                             &smb_fname_parent);
437         if (!NT_STATUS_IS_OK(status)) {
438                 return status;
439         }
440
441         ret = SMB_VFS_STAT(conn, smb_fname_parent);
442         if (ret == -1) {
443                 status = map_nt_error_from_unix(errno);
444                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
445                          "directory %s. Error was %s\n",
446                          smb_fname_str_dbg(smb_fname_parent),
447                          strerror(errno)));
448                 goto out;
449         }
450
451         /* We've already done an lstat into psbuf, and we know it's a
452            directory. If we can cd into the directory and the dev/ino
453            are the same then we can safely chown without races as
454            we're locking the directory in place by being in it.  This
455            should work on any UNIX (thanks tridge :-). JRA.
456         */
457
458         saved_dir = vfs_GetWd(ctx,conn);
459         if (!saved_dir) {
460                 status = map_nt_error_from_unix(errno);
461                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
462                          "current working directory. Error was %s\n",
463                          strerror(errno)));
464                 goto out;
465         }
466
467         /* Chdir into the new path. */
468         if (vfs_ChDir(conn, fname) == -1) {
469                 status = map_nt_error_from_unix(errno);
470                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
471                          "current working directory to %s. Error "
472                          "was %s\n", fname, strerror(errno) ));
473                 goto chdir;
474         }
475
476         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
477                                             &smb_fname_cwd);
478         if (!NT_STATUS_IS_OK(status)) {
479                 return status;
480         }
481
482         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
483         if (ret == -1) {
484                 status = map_nt_error_from_unix(errno);
485                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
486                          "directory '.' (%s) Error was %s\n",
487                          fname, strerror(errno)));
488                 goto chdir;
489         }
490
491         /* Ensure we're pointing at the same place. */
492         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
493             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
494                 DEBUG(0,("change_dir_owner_to_parent: "
495                          "device/inode on directory %s changed. "
496                          "Refusing to chown !\n", fname ));
497                 status = NT_STATUS_ACCESS_DENIED;
498                 goto chdir;
499         }
500
501         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
502                 /* Already this uid - no need to change. */
503                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
504                         "is already owned by uid %d\n",
505                         fname,
506                         (int)smb_fname_cwd->st.st_ex_uid ));
507                 status = NT_STATUS_OK;
508                 goto chdir;
509         }
510
511         become_root();
512         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
513                             (gid_t)-1);
514         unbecome_root();
515         if (ret == -1) {
516                 status = map_nt_error_from_unix(errno);
517                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
518                           "directory %s to parent directory uid %u. "
519                           "Error was %s\n", fname,
520                           (unsigned int)smb_fname_parent->st.st_ex_uid,
521                           strerror(errno) ));
522         } else {
523                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
524                         "directory %s to parent directory uid %u.\n",
525                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
526                 /* Ensure the uid entry is updated. */
527                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
528         }
529
530  chdir:
531         vfs_ChDir(conn,saved_dir);
532  out:
533         TALLOC_FREE(smb_fname_parent);
534         TALLOC_FREE(smb_fname_cwd);
535         return status;
536 }
537
538 /****************************************************************************
539  Open a file - returning a guaranteed ATOMIC indication of if the
540  file was created or not.
541 ****************************************************************************/
542
543 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
544                         files_struct *fsp,
545                         int flags,
546                         mode_t mode,
547                         bool *file_created)
548 {
549         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
550         bool file_existed = VALID_STAT(fsp->fsp_name->st);
551
552         *file_created = false;
553
554         if (!(flags & O_CREAT)) {
555                 /*
556                  * We're not creating the file, just pass through.
557                  */
558                 return fd_open(conn, fsp, flags, mode);
559         }
560
561         if (flags & O_EXCL) {
562                 /*
563                  * Fail if already exists, just pass through.
564                  */
565                 status = fd_open(conn, fsp, flags, mode);
566                 if (NT_STATUS_IS_OK(status)) {
567                         /*
568                          * Here we've opened with O_CREAT|O_EXCL
569                          * and got success. We *know* we created
570                          * this file.
571                          */
572                         *file_created = true;
573                 }
574                 return status;
575         }
576
577         /*
578          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
579          * To know absolutely if we created the file or not,
580          * we can never call O_CREAT without O_EXCL. So if
581          * we think the file existed, try without O_CREAT|O_EXCL.
582          * If we think the file didn't exist, try with
583          * O_CREAT|O_EXCL. Keep bouncing between these two
584          * requests until either the file is created, or
585          * opened. Either way, we keep going until we get
586          * a returnable result (error, or open/create).
587          */
588
589         while(1) {
590                 int curr_flags = flags;
591
592                 if (file_existed) {
593                         /* Just try open, do not create. */
594                         curr_flags &= ~(O_CREAT);
595                         status = fd_open(conn, fsp, curr_flags, mode);
596                         if (NT_STATUS_EQUAL(status,
597                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
598                                 /*
599                                  * Someone deleted it in the meantime.
600                                  * Retry with O_EXCL.
601                                  */
602                                 file_existed = false;
603                                 DEBUG(10,("fd_open_atomic: file %s existed. "
604                                         "Retry.\n",
605                                         smb_fname_str_dbg(fsp->fsp_name)));
606                                         continue;
607                         }
608                 } else {
609                         /* Try create exclusively, fail if it exists. */
610                         curr_flags |= O_EXCL;
611                         status = fd_open(conn, fsp, curr_flags, mode);
612                         if (NT_STATUS_EQUAL(status,
613                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
614                                 /*
615                                  * Someone created it in the meantime.
616                                  * Retry without O_CREAT.
617                                  */
618                                 file_existed = true;
619                                 DEBUG(10,("fd_open_atomic: file %s "
620                                         "did not exist. Retry.\n",
621                                         smb_fname_str_dbg(fsp->fsp_name)));
622                                 continue;
623                         }
624                         if (NT_STATUS_IS_OK(status)) {
625                                 /*
626                                  * Here we've opened with O_CREAT|O_EXCL
627                                  * and got success. We *know* we created
628                                  * this file.
629                                  */
630                                 *file_created = true;
631                         }
632                 }
633                 /* Create is done, or failed. */
634                 break;
635         }
636         return status;
637 }
638
639 /****************************************************************************
640  Open a file.
641 ****************************************************************************/
642
643 static NTSTATUS open_file(files_struct *fsp,
644                           connection_struct *conn,
645                           struct smb_request *req,
646                           const char *parent_dir,
647                           int flags,
648                           mode_t unx_mode,
649                           uint32 access_mask, /* client requested access mask. */
650                           uint32 open_access_mask, /* what we're actually using in the open. */
651                           bool *p_file_created)
652 {
653         struct smb_filename *smb_fname = fsp->fsp_name;
654         NTSTATUS status = NT_STATUS_OK;
655         int accmode = (flags & O_ACCMODE);
656         int local_flags = flags;
657         bool file_existed = VALID_STAT(fsp->fsp_name->st);
658
659         fsp->fh->fd = -1;
660         errno = EPERM;
661
662         /* Check permissions */
663
664         /*
665          * This code was changed after seeing a client open request 
666          * containing the open mode of (DENY_WRITE/read-only) with
667          * the 'create if not exist' bit set. The previous code
668          * would fail to open the file read only on a read-only share
669          * as it was checking the flags parameter  directly against O_RDONLY,
670          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
671          * JRA.
672          */
673
674         if (!CAN_WRITE(conn)) {
675                 /* It's a read-only share - fail if we wanted to write. */
676                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
677                         DEBUG(3,("Permission denied opening %s\n",
678                                  smb_fname_str_dbg(smb_fname)));
679                         return NT_STATUS_ACCESS_DENIED;
680                 } else if(flags & O_CREAT) {
681                         /* We don't want to write - but we must make sure that
682                            O_CREAT doesn't create the file if we have write
683                            access into the directory.
684                         */
685                         flags &= ~(O_CREAT|O_EXCL);
686                         local_flags &= ~(O_CREAT|O_EXCL);
687                 }
688         }
689
690         /*
691          * This little piece of insanity is inspired by the
692          * fact that an NT client can open a file for O_RDONLY,
693          * but set the create disposition to FILE_EXISTS_TRUNCATE.
694          * If the client *can* write to the file, then it expects to
695          * truncate the file, even though it is opening for readonly.
696          * Quicken uses this stupid trick in backup file creation...
697          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
698          * for helping track this one down. It didn't bite us in 2.0.x
699          * as we always opened files read-write in that release. JRA.
700          */
701
702         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
703                 DEBUG(10,("open_file: truncate requested on read-only open "
704                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
705                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
706         }
707
708         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
709             (!file_existed && (local_flags & O_CREAT)) ||
710             ((local_flags & O_TRUNC) == O_TRUNC) ) {
711                 const char *wild;
712                 int ret;
713
714                 /*
715                  * We can't actually truncate here as the file may be locked.
716                  * open_file_ntcreate will take care of the truncate later. JRA.
717                  */
718
719                 local_flags &= ~O_TRUNC;
720
721 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
722                 /*
723                  * We would block on opening a FIFO with no one else on the
724                  * other end. Do what we used to do and add O_NONBLOCK to the
725                  * open flags. JRA.
726                  */
727
728                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
729                         local_flags |= O_NONBLOCK;
730                 }
731 #endif
732
733                 /* Don't create files with Microsoft wildcard characters. */
734                 if (fsp->base_fsp) {
735                         /*
736                          * wildcard characters are allowed in stream names
737                          * only test the basefilename
738                          */
739                         wild = fsp->base_fsp->fsp_name->base_name;
740                 } else {
741                         wild = smb_fname->base_name;
742                 }
743                 if ((local_flags & O_CREAT) && !file_existed &&
744                     ms_has_wild(wild))  {
745                         return NT_STATUS_OBJECT_NAME_INVALID;
746                 }
747
748                 /* Can we access this file ? */
749                 if (!fsp->base_fsp) {
750                         /* Only do this check on non-stream open. */
751                         if (file_existed) {
752                                 status = smbd_check_access_rights(conn,
753                                                 smb_fname,
754                                                 access_mask);
755                         } else if (local_flags & O_CREAT){
756                                 status = check_parent_access(conn,
757                                                 smb_fname,
758                                                 SEC_DIR_ADD_FILE);
759                         } else {
760                                 /* File didn't exist and no O_CREAT. */
761                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
762                         }
763                         if (!NT_STATUS_IS_OK(status)) {
764                                 DEBUG(10,("open_file: "
765                                         "%s on file "
766                                         "%s returned %s\n",
767                                         file_existed ?
768                                                 "smbd_check_access_rights" :
769                                                 "check_parent_access",
770                                         smb_fname_str_dbg(smb_fname),
771                                         nt_errstr(status) ));
772                                 return status;
773                         }
774                 }
775
776                 /* Actually do the open */
777                 status = fd_open_atomic(conn, fsp, local_flags,
778                                 unx_mode, p_file_created);
779                 if (!NT_STATUS_IS_OK(status)) {
780                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
781                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
782                                  nt_errstr(status),local_flags,flags));
783                         return status;
784                 }
785
786                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
787                 if (ret == -1) {
788                         /* If we have an fd, this stat should succeed. */
789                         DEBUG(0,("Error doing fstat on open file %s "
790                                 "(%s)\n",
791                                 smb_fname_str_dbg(smb_fname),
792                                 strerror(errno) ));
793                         status = map_nt_error_from_unix(errno);
794                         fd_close(fsp);
795                         return status;
796                 }
797
798                 if (*p_file_created) {
799                         /* We created this file. */
800
801                         bool need_re_stat = false;
802                         /* Do all inheritance work after we've
803                            done a successful fstat call and filled
804                            in the stat struct in fsp->fsp_name. */
805
806                         /* Inherit the ACL if required */
807                         if (lp_inherit_perms(SNUM(conn))) {
808                                 inherit_access_posix_acl(conn, parent_dir,
809                                                          smb_fname->base_name,
810                                                          unx_mode);
811                                 need_re_stat = true;
812                         }
813
814                         /* Change the owner if required. */
815                         if (lp_inherit_owner(SNUM(conn))) {
816                                 change_file_owner_to_parent(conn, parent_dir,
817                                                             fsp);
818                                 need_re_stat = true;
819                         }
820
821                         if (need_re_stat) {
822                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
823                                 /* If we have an fd, this stat should succeed. */
824                                 if (ret == -1) {
825                                         DEBUG(0,("Error doing fstat on open file %s "
826                                                  "(%s)\n",
827                                                  smb_fname_str_dbg(smb_fname),
828                                                  strerror(errno) ));
829                                 }
830                         }
831
832                         notify_fname(conn, NOTIFY_ACTION_ADDED,
833                                      FILE_NOTIFY_CHANGE_FILE_NAME,
834                                      smb_fname->base_name);
835                 }
836         } else {
837                 fsp->fh->fd = -1; /* What we used to call a stat open. */
838                 if (!file_existed) {
839                         /* File must exist for a stat open. */
840                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
841                 }
842
843                 status = smbd_check_access_rights(conn,
844                                 smb_fname,
845                                 access_mask);
846
847                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
848                                 fsp->posix_open &&
849                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
850                         /* This is a POSIX stat open for delete
851                          * or rename on a symlink that points
852                          * nowhere. Allow. */
853                         DEBUG(10,("open_file: allowing POSIX "
854                                   "open on bad symlink %s\n",
855                                   smb_fname_str_dbg(smb_fname)));
856                         status = NT_STATUS_OK;
857                 }
858
859                 if (!NT_STATUS_IS_OK(status)) {
860                         DEBUG(10,("open_file: "
861                                 "smbd_check_access_rights on file "
862                                 "%s returned %s\n",
863                                 smb_fname_str_dbg(smb_fname),
864                                 nt_errstr(status) ));
865                         return status;
866                 }
867         }
868
869         /*
870          * POSIX allows read-only opens of directories. We don't
871          * want to do this (we use a different code path for this)
872          * so catch a directory open and return an EISDIR. JRA.
873          */
874
875         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
876                 fd_close(fsp);
877                 errno = EISDIR;
878                 return NT_STATUS_FILE_IS_A_DIRECTORY;
879         }
880
881         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
882         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
883         fsp->file_pid = req ? req->smbpid : 0;
884         fsp->can_lock = True;
885         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
886         fsp->can_write =
887                 CAN_WRITE(conn) &&
888                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
889         fsp->print_file = NULL;
890         fsp->modified = False;
891         fsp->sent_oplock_break = NO_BREAK_SENT;
892         fsp->is_directory = False;
893         if (conn->aio_write_behind_list &&
894             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
895                        conn->case_sensitive)) {
896                 fsp->aio_write_behind = True;
897         }
898
899         fsp->wcp = NULL; /* Write cache pointer. */
900
901         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
902                  conn->session_info->unix_info->unix_name,
903                  smb_fname_str_dbg(smb_fname),
904                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
905                  conn->num_files_open));
906
907         errno = 0;
908         return NT_STATUS_OK;
909 }
910
911 /****************************************************************************
912  Check if we can open a file with a share mode.
913  Returns True if conflict, False if not.
914 ****************************************************************************/
915
916 static bool share_conflict(struct share_mode_entry *entry,
917                            uint32 access_mask,
918                            uint32 share_access)
919 {
920         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
921                   "entry->share_access = 0x%x, "
922                   "entry->private_options = 0x%x\n",
923                   (unsigned int)entry->access_mask,
924                   (unsigned int)entry->share_access,
925                   (unsigned int)entry->private_options));
926
927         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
928                   (unsigned int)access_mask, (unsigned int)share_access));
929
930         if ((entry->access_mask & (FILE_WRITE_DATA|
931                                    FILE_APPEND_DATA|
932                                    FILE_READ_DATA|
933                                    FILE_EXECUTE|
934                                    DELETE_ACCESS)) == 0) {
935                 DEBUG(10,("share_conflict: No conflict due to "
936                           "entry->access_mask = 0x%x\n",
937                           (unsigned int)entry->access_mask ));
938                 return False;
939         }
940
941         if ((access_mask & (FILE_WRITE_DATA|
942                             FILE_APPEND_DATA|
943                             FILE_READ_DATA|
944                             FILE_EXECUTE|
945                             DELETE_ACCESS)) == 0) {
946                 DEBUG(10,("share_conflict: No conflict due to "
947                           "access_mask = 0x%x\n",
948                           (unsigned int)access_mask ));
949                 return False;
950         }
951
952 #if 1 /* JRA TEST - Superdebug. */
953 #define CHECK_MASK(num, am, right, sa, share) \
954         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
955                 (unsigned int)(num), (unsigned int)(am), \
956                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
957         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
958                 (unsigned int)(num), (unsigned int)(sa), \
959                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
960         if (((am) & (right)) && !((sa) & (share))) { \
961                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
962 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
963                         (unsigned int)(share) )); \
964                 return True; \
965         }
966 #else
967 #define CHECK_MASK(num, am, right, sa, share) \
968         if (((am) & (right)) && !((sa) & (share))) { \
969                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
970 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
971                         (unsigned int)(share) )); \
972                 return True; \
973         }
974 #endif
975
976         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
977                    share_access, FILE_SHARE_WRITE);
978         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
979                    entry->share_access, FILE_SHARE_WRITE);
980
981         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
982                    share_access, FILE_SHARE_READ);
983         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
984                    entry->share_access, FILE_SHARE_READ);
985
986         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
987                    share_access, FILE_SHARE_DELETE);
988         CHECK_MASK(6, access_mask, DELETE_ACCESS,
989                    entry->share_access, FILE_SHARE_DELETE);
990
991         DEBUG(10,("share_conflict: No conflict.\n"));
992         return False;
993 }
994
995 #if defined(DEVELOPER)
996 static void validate_my_share_entries(struct smbd_server_connection *sconn,
997                                       int num,
998                                       struct share_mode_entry *share_entry)
999 {
1000         struct server_id self = messaging_server_id(sconn->msg_ctx);
1001         files_struct *fsp;
1002
1003         if (!serverid_equal(&self, &share_entry->pid)) {
1004                 return;
1005         }
1006
1007         if (is_deferred_open_entry(share_entry) &&
1008             !open_was_deferred(sconn, share_entry->op_mid)) {
1009                 char *str = talloc_asprintf(talloc_tos(),
1010                         "Got a deferred entry without a request: "
1011                         "PANIC: %s\n",
1012                         share_mode_str(talloc_tos(), num, share_entry));
1013                 smb_panic(str);
1014         }
1015
1016         if (!is_valid_share_mode_entry(share_entry)) {
1017                 return;
1018         }
1019
1020         fsp = file_find_dif(sconn, share_entry->id,
1021                             share_entry->share_file_id);
1022         if (!fsp) {
1023                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1024                          share_mode_str(talloc_tos(), num, share_entry) ));
1025                 smb_panic("validate_my_share_entries: Cannot match a "
1026                           "share entry with an open file\n");
1027         }
1028
1029         if (is_deferred_open_entry(share_entry)) {
1030                 goto panic;
1031         }
1032
1033         if ((share_entry->op_type == NO_OPLOCK) &&
1034             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1035                 /* Someone has already written to it, but I haven't yet
1036                  * noticed */
1037                 return;
1038         }
1039
1040         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1041                 goto panic;
1042         }
1043
1044         return;
1045
1046  panic:
1047         {
1048                 char *str;
1049                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1050                          share_mode_str(talloc_tos(), num, share_entry) ));
1051                 str = talloc_asprintf(talloc_tos(),
1052                         "validate_my_share_entries: "
1053                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1054                          fsp->fsp_name->base_name,
1055                          (unsigned int)fsp->oplock_type,
1056                          (unsigned int)share_entry->op_type );
1057                 smb_panic(str);
1058         }
1059 }
1060 #endif
1061
1062 bool is_stat_open(uint32 access_mask)
1063 {
1064         return (access_mask &&
1065                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
1066                                   FILE_WRITE_ATTRIBUTES))==0) &&
1067                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
1068                                  FILE_WRITE_ATTRIBUTES)) != 0));
1069 }
1070
1071 /****************************************************************************
1072  Deal with share modes
1073  Invarient: Share mode must be locked on entry and exit.
1074  Returns -1 on error, or number of share modes on success (may be zero).
1075 ****************************************************************************/
1076
1077 static NTSTATUS open_mode_check(connection_struct *conn,
1078                                 struct share_mode_lock *lck,
1079                                 uint32_t name_hash,
1080                                 uint32 access_mask,
1081                                 uint32 share_access,
1082                                 uint32 create_options,
1083                                 bool *file_existed)
1084 {
1085         int i;
1086
1087         if(lck->data->num_share_modes == 0) {
1088                 return NT_STATUS_OK;
1089         }
1090
1091         /* A delete on close prohibits everything */
1092
1093         if (is_delete_on_close_set(lck, name_hash)) {
1094                 /*
1095                  * Check the delete on close token
1096                  * is valid. It could have been left
1097                  * after a server crash.
1098                  */
1099                 for(i = 0; i < lck->data->num_share_modes; i++) {
1100                         if (!share_mode_stale_pid(lck->data, i)) {
1101
1102                                 *file_existed = true;
1103
1104                                 return NT_STATUS_DELETE_PENDING;
1105                         }
1106                 }
1107                 return NT_STATUS_OK;
1108         }
1109
1110         if (is_stat_open(access_mask)) {
1111                 /* Stat open that doesn't trigger oplock breaks or share mode
1112                  * checks... ! JRA. */
1113                 return NT_STATUS_OK;
1114         }
1115
1116         /*
1117          * Check if the share modes will give us access.
1118          */
1119
1120 #if defined(DEVELOPER)
1121         for(i = 0; i < lck->data->num_share_modes; i++) {
1122                 validate_my_share_entries(conn->sconn, i,
1123                                           &lck->data->share_modes[i]);
1124         }
1125 #endif
1126
1127         /* Now we check the share modes, after any oplock breaks. */
1128         for(i = 0; i < lck->data->num_share_modes; i++) {
1129
1130                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1131                         continue;
1132                 }
1133
1134                 /* someone else has a share lock on it, check to see if we can
1135                  * too */
1136                 if (share_conflict(&lck->data->share_modes[i],
1137                                    access_mask, share_access)) {
1138
1139                         if (share_mode_stale_pid(lck->data, i)) {
1140                                 continue;
1141                         }
1142
1143                         *file_existed = true;
1144
1145                         return NT_STATUS_SHARING_VIOLATION;
1146                 }
1147         }
1148
1149         if (lck->data->num_share_modes != 0) {
1150                 *file_existed = true;
1151         }
1152
1153         return NT_STATUS_OK;
1154 }
1155
1156 static bool is_delete_request(files_struct *fsp) {
1157         return ((fsp->access_mask == DELETE_ACCESS) &&
1158                 (fsp->oplock_type == NO_OPLOCK));
1159 }
1160
1161 /*
1162  * Send a break message to the oplock holder and delay the open for
1163  * our client.
1164  */
1165
1166 static NTSTATUS send_break_message(files_struct *fsp,
1167                                         struct share_mode_entry *exclusive,
1168                                         uint64_t mid,
1169                                         int oplock_request)
1170 {
1171         NTSTATUS status;
1172         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1173
1174         DEBUG(10, ("Sending break request to PID %s\n",
1175                    procid_str_static(&exclusive->pid)));
1176         exclusive->op_mid = mid;
1177
1178         /* Create the message. */
1179         share_mode_entry_to_message(msg, exclusive);
1180
1181         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1182            don't want this set in the share mode struct pointed to by lck. */
1183
1184         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1185                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1186                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1187         }
1188
1189         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1190                                     MSG_SMB_BREAK_REQUEST,
1191                                     (uint8 *)msg,
1192                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1193         if (!NT_STATUS_IS_OK(status)) {
1194                 DEBUG(3, ("Could not send oplock break message: %s\n",
1195                           nt_errstr(status)));
1196         }
1197
1198         return status;
1199 }
1200
1201 /*
1202  * Return share_mode_entry pointers for :
1203  * 1). Batch oplock entry.
1204  * 2). Batch or exclusive oplock entry (may be identical to #1).
1205  * bool have_level2_oplock
1206  * bool have_no_oplock.
1207  * Do internal consistency checks on the share mode for a file.
1208  */
1209
1210 static void find_oplock_types(files_struct *fsp,
1211                                 int oplock_request,
1212                                 const struct share_mode_lock *lck,
1213                                 struct share_mode_entry **pp_batch,
1214                                 struct share_mode_entry **pp_ex_or_batch,
1215                                 bool *got_level2,
1216                                 bool *got_no_oplock)
1217 {
1218         int i;
1219
1220         *pp_batch = NULL;
1221         *pp_ex_or_batch = NULL;
1222         *got_level2 = false;
1223         *got_no_oplock = false;
1224
1225         /* Ignore stat or internal opens, as is done in
1226                 delay_for_batch_oplocks() and
1227                 delay_for_exclusive_oplocks().
1228          */
1229         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1230                 return;
1231         }
1232
1233         for (i=0; i<lck->data->num_share_modes; i++) {
1234                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1235                         continue;
1236                 }
1237
1238                 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1239                                 is_stat_open(lck->data->share_modes[i].access_mask)) {
1240                         /* We ignore stat opens in the table - they
1241                            always have NO_OPLOCK and never get or
1242                            cause breaks. JRA. */
1243                         continue;
1244                 }
1245
1246                 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1247                         /* batch - can only be one. */
1248                         if (share_mode_stale_pid(lck->data, i)) {
1249                                 DEBUG(10, ("Found stale batch oplock\n"));
1250                                 continue;
1251                         }
1252                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1253                                 smb_panic("Bad batch oplock entry.");
1254                         }
1255                         *pp_batch = &lck->data->share_modes[i];
1256                 }
1257
1258                 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1259                         if (share_mode_stale_pid(lck->data, i)) {
1260                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1261                                 continue;
1262                         }
1263                         /* Exclusive or batch - can only be one. */
1264                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1265                                 smb_panic("Bad exclusive or batch oplock entry.");
1266                         }
1267                         *pp_ex_or_batch = &lck->data->share_modes[i];
1268                 }
1269
1270                 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1271                         if (*pp_batch || *pp_ex_or_batch) {
1272                                 if (share_mode_stale_pid(lck->data, i)) {
1273                                         DEBUG(10, ("Found stale LevelII "
1274                                                    "oplock\n"));
1275                                         continue;
1276                                 }
1277                                 smb_panic("Bad levelII oplock entry.");
1278                         }
1279                         *got_level2 = true;
1280                 }
1281
1282                 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1283                         if (*pp_batch || *pp_ex_or_batch) {
1284                                 if (share_mode_stale_pid(lck->data, i)) {
1285                                         DEBUG(10, ("Found stale NO_OPLOCK "
1286                                                    "entry\n"));
1287                                         continue;
1288                                 }
1289                                 smb_panic("Bad no oplock entry.");
1290                         }
1291                         *got_no_oplock = true;
1292                 }
1293         }
1294 }
1295
1296 static bool delay_for_batch_oplocks(files_struct *fsp,
1297                                         uint64_t mid,
1298                                         int oplock_request,
1299                                         struct share_mode_entry *batch_entry)
1300 {
1301         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1302                 return false;
1303         }
1304         if (batch_entry == NULL) {
1305                 return false;
1306         }
1307
1308         /* Found a batch oplock */
1309         send_break_message(fsp, batch_entry, mid, oplock_request);
1310         return true;
1311 }
1312
1313 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1314                                         uint64_t mid,
1315                                         int oplock_request,
1316                                         struct share_mode_entry *ex_entry)
1317 {
1318         bool delay_it;
1319
1320         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1321                 return false;
1322         }
1323         if (ex_entry == NULL) {
1324                 return false;
1325         }
1326
1327         /* Found an exclusive or batch oplock */
1328
1329         delay_it = is_delete_request(fsp) ?
1330                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1331
1332         if (!delay_it) {
1333                 return false;
1334         }
1335
1336         send_break_message(fsp, ex_entry, mid, oplock_request);
1337         return true;
1338 }
1339
1340 static bool file_has_brlocks(files_struct *fsp)
1341 {
1342         struct byte_range_lock *br_lck;
1343
1344         br_lck = brl_get_locks_readonly(fsp);
1345         if (!br_lck)
1346                 return false;
1347
1348         return br_lck->num_locks > 0 ? true : false;
1349 }
1350
1351 static void grant_fsp_oplock_type(files_struct *fsp,
1352                                 int oplock_request,
1353                                 bool got_level2_oplock,
1354                                 bool got_a_none_oplock)
1355 {
1356         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1357                             lp_level2_oplocks(SNUM(fsp->conn));
1358
1359         /* Start by granting what the client asked for,
1360            but ensure no SAMBA_PRIVATE bits can be set. */
1361         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1362
1363         if (oplock_request & INTERNAL_OPEN_ONLY) {
1364                 /* No oplocks on internal open. */
1365                 fsp->oplock_type = NO_OPLOCK;
1366                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1367                         fsp->oplock_type, fsp_str_dbg(fsp)));
1368                 return;
1369         }
1370
1371         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1372                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1373                         fsp_str_dbg(fsp)));
1374                 fsp->oplock_type = NO_OPLOCK;
1375         }
1376
1377         if (is_stat_open(fsp->access_mask)) {
1378                 /* Leave the value already set. */
1379                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1380                         fsp->oplock_type, fsp_str_dbg(fsp)));
1381                 return;
1382         }
1383
1384         /*
1385          * Match what was requested (fsp->oplock_type) with
1386          * what was found in the existing share modes.
1387          */
1388
1389         if (got_a_none_oplock) {
1390                 fsp->oplock_type = NO_OPLOCK;
1391         } else if (got_level2_oplock) {
1392                 if (fsp->oplock_type == NO_OPLOCK ||
1393                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1394                         /* Store a level2 oplock, but don't tell the client */
1395                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1396                 } else {
1397                         fsp->oplock_type = LEVEL_II_OPLOCK;
1398                 }
1399         } else {
1400                 /* All share_mode_entries are placeholders or deferred.
1401                  * Silently upgrade to fake levelII if the client didn't
1402                  * ask for an oplock. */
1403                 if (fsp->oplock_type == NO_OPLOCK) {
1404                         /* Store a level2 oplock, but don't tell the client */
1405                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1406                 }
1407         }
1408
1409         /*
1410          * Don't grant level2 to clients that don't want them
1411          * or if we've turned them off.
1412          */
1413         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1414                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1415         }
1416
1417         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1418                   fsp->oplock_type, fsp_str_dbg(fsp)));
1419 }
1420
1421 static bool request_timed_out(struct timeval request_time,
1422                               struct timeval timeout)
1423 {
1424         struct timeval now, end_time;
1425         GetTimeOfDay(&now);
1426         end_time = timeval_sum(&request_time, &timeout);
1427         return (timeval_compare(&end_time, &now) < 0);
1428 }
1429
1430 /****************************************************************************
1431  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1432 ****************************************************************************/
1433
1434 static void defer_open(struct share_mode_lock *lck,
1435                        struct timeval request_time,
1436                        struct timeval timeout,
1437                        struct smb_request *req,
1438                        struct deferred_open_record *state)
1439 {
1440         struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1441
1442         /* Paranoia check */
1443
1444         if (lck) {
1445                 int i;
1446
1447                 for (i=0; i<lck->data->num_share_modes; i++) {
1448                         struct share_mode_entry *e = &lck->data->share_modes[i];
1449
1450                         if (is_deferred_open_entry(e) &&
1451                             serverid_equal(&self, &e->pid) &&
1452                             (e->op_mid == req->mid)) {
1453                                 DEBUG(0, ("Trying to defer an already deferred "
1454                                         "request: mid=%llu, exiting\n",
1455                                         (unsigned long long)req->mid));
1456                                 exit_server("attempt to defer a deferred request");
1457                         }
1458                 }
1459         }
1460
1461         /* End paranoia check */
1462
1463         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1464                   "open entry for mid %llu\n",
1465                   (unsigned int)request_time.tv_sec,
1466                   (unsigned int)request_time.tv_usec,
1467                   (unsigned long long)req->mid));
1468
1469         if (!push_deferred_open_message_smb(req, request_time, timeout,
1470                                        state->id, (char *)state, sizeof(*state))) {
1471                 exit_server("push_deferred_open_message_smb failed");
1472         }
1473         if (lck) {
1474                 add_deferred_open(lck, req->mid, request_time, self, state->id);
1475         }
1476 }
1477
1478
1479 /****************************************************************************
1480  On overwrite open ensure that the attributes match.
1481 ****************************************************************************/
1482
1483 bool open_match_attributes(connection_struct *conn,
1484                            uint32 old_dos_attr,
1485                            uint32 new_dos_attr,
1486                            mode_t existing_unx_mode,
1487                            mode_t new_unx_mode,
1488                            mode_t *returned_unx_mode)
1489 {
1490         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1491
1492         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1493         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1494
1495         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) || 
1496            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1497                 *returned_unx_mode = new_unx_mode;
1498         } else {
1499                 *returned_unx_mode = (mode_t)0;
1500         }
1501
1502         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1503                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1504                   "returned_unx_mode = 0%o\n",
1505                   (unsigned int)old_dos_attr,
1506                   (unsigned int)existing_unx_mode,
1507                   (unsigned int)new_dos_attr,
1508                   (unsigned int)*returned_unx_mode ));
1509
1510         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1511         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1512                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1513                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1514                         return False;
1515                 }
1516         }
1517         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1518                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1519                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1520                         return False;
1521                 }
1522         }
1523         return True;
1524 }
1525
1526 /****************************************************************************
1527  Special FCB or DOS processing in the case of a sharing violation.
1528  Try and find a duplicated file handle.
1529 ****************************************************************************/
1530
1531 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1532                                 connection_struct *conn,
1533                                 files_struct *fsp_to_dup_into,
1534                                 const struct smb_filename *smb_fname,
1535                                 struct file_id id,
1536                                 uint16 file_pid,
1537                                 uint64_t vuid,
1538                                 uint32 access_mask,
1539                                 uint32 share_access,
1540                                 uint32 create_options)
1541 {
1542         files_struct *fsp;
1543
1544         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1545                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1546
1547         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1548             fsp = file_find_di_next(fsp)) {
1549
1550                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1551                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1552                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1553                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1554                           (unsigned int)fsp->file_pid,
1555                           (unsigned int)fsp->fh->private_options,
1556                           (unsigned int)fsp->access_mask ));
1557
1558                 if (fsp->fh->fd != -1 &&
1559                     fsp->vuid == vuid &&
1560                     fsp->file_pid == file_pid &&
1561                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1562                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1563                     (fsp->access_mask & FILE_WRITE_DATA) &&
1564                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1565                     strequal(fsp->fsp_name->stream_name,
1566                              smb_fname->stream_name)) {
1567                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1568                         break;
1569                 }
1570         }
1571
1572         if (!fsp) {
1573                 return NT_STATUS_NOT_FOUND;
1574         }
1575
1576         /* quite an insane set of semantics ... */
1577         if (is_executable(smb_fname->base_name) &&
1578             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1579                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1580                 return NT_STATUS_INVALID_PARAMETER;
1581         }
1582
1583         /* We need to duplicate this fsp. */
1584         return dup_file_fsp(req, fsp, access_mask, share_access,
1585                             create_options, fsp_to_dup_into);
1586 }
1587
1588 static void schedule_defer_open(struct share_mode_lock *lck,
1589                                 struct timeval request_time,
1590                                 struct smb_request *req)
1591 {
1592         struct deferred_open_record state;
1593
1594         /* This is a relative time, added to the absolute
1595            request_time value to get the absolute timeout time.
1596            Note that if this is the second or greater time we enter
1597            this codepath for this particular request mid then
1598            request_time is left as the absolute time of the *first*
1599            time this request mid was processed. This is what allows
1600            the request to eventually time out. */
1601
1602         struct timeval timeout;
1603
1604         /* Normally the smbd we asked should respond within
1605          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1606          * the client did, give twice the timeout as a safety
1607          * measure here in case the other smbd is stuck
1608          * somewhere else. */
1609
1610         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1611
1612         /* Nothing actually uses state.delayed_for_oplocks
1613            but it's handy to differentiate in debug messages
1614            between a 30 second delay due to oplock break, and
1615            a 1 second delay for share mode conflicts. */
1616
1617         state.delayed_for_oplocks = True;
1618         state.async_open = false;
1619         state.id = lck->data->id;
1620
1621         if (!request_timed_out(request_time, timeout)) {
1622                 defer_open(lck, request_time, timeout, req, &state);
1623         }
1624 }
1625
1626 /****************************************************************************
1627  Reschedule an open call that went asynchronous.
1628 ****************************************************************************/
1629
1630 static void schedule_async_open(struct timeval request_time,
1631                                 struct smb_request *req)
1632 {
1633         struct deferred_open_record state;
1634         struct timeval timeout;
1635
1636         timeout = timeval_set(20, 0);
1637
1638         ZERO_STRUCT(state);
1639         state.delayed_for_oplocks = false;
1640         state.async_open = true;
1641
1642         if (!request_timed_out(request_time, timeout)) {
1643                 defer_open(NULL, request_time, timeout, req, &state);
1644         }
1645 }
1646
1647 /****************************************************************************
1648  Work out what access_mask to use from what the client sent us.
1649 ****************************************************************************/
1650
1651 static NTSTATUS smbd_calculate_maximum_allowed_access(
1652         connection_struct *conn,
1653         const struct smb_filename *smb_fname,
1654         uint32_t *p_access_mask)
1655 {
1656         struct security_descriptor *sd;
1657         uint32_t access_granted;
1658         NTSTATUS status;
1659
1660         if (get_current_uid(conn) == (uid_t)0) {
1661                 *p_access_mask |= FILE_GENERIC_ALL;
1662                 return NT_STATUS_OK;
1663         }
1664
1665         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1666                                     (SECINFO_OWNER |
1667                                      SECINFO_GROUP |
1668                                      SECINFO_DACL),&sd);
1669
1670         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1671                 /*
1672                  * File did not exist
1673                  */
1674                 *p_access_mask = FILE_GENERIC_ALL;
1675                 return NT_STATUS_OK;
1676         }
1677         if (!NT_STATUS_IS_OK(status)) {
1678                 DEBUG(10,("smbd_calculate_access_mask: "
1679                           "Could not get acl on file %s: %s\n",
1680                           smb_fname_str_dbg(smb_fname),
1681                           nt_errstr(status)));
1682                 return NT_STATUS_ACCESS_DENIED;
1683         }
1684
1685         /*
1686          * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1687          * also takes care of owner WRITE_DAC and READ_CONTROL.
1688          */
1689         status = se_file_access_check(sd,
1690                                  get_current_nttok(conn),
1691                                  false,
1692                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1693                                  &access_granted);
1694
1695         TALLOC_FREE(sd);
1696
1697         if (!NT_STATUS_IS_OK(status)) {
1698                 DEBUG(10, ("smbd_calculate_access_mask: "
1699                            "Access denied on file %s: "
1700                            "when calculating maximum access\n",
1701                            smb_fname_str_dbg(smb_fname)));
1702                 return NT_STATUS_ACCESS_DENIED;
1703         }
1704         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1705         return NT_STATUS_OK;
1706 }
1707
1708 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1709                                     const struct smb_filename *smb_fname,
1710                                     uint32_t access_mask,
1711                                     uint32_t *access_mask_out)
1712 {
1713         NTSTATUS status;
1714         uint32_t orig_access_mask = access_mask;
1715         uint32_t rejected_share_access;
1716
1717         /*
1718          * Convert GENERIC bits to specific bits.
1719          */
1720
1721         se_map_generic(&access_mask, &file_generic_mapping);
1722
1723         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1724         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1725
1726                 status = smbd_calculate_maximum_allowed_access(
1727                         conn, smb_fname, &access_mask);
1728
1729                 if (!NT_STATUS_IS_OK(status)) {
1730                         return status;
1731                 }
1732
1733                 access_mask &= conn->share_access;
1734         }
1735
1736         rejected_share_access = access_mask & ~(conn->share_access);
1737
1738         if (rejected_share_access) {
1739                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1740                         "file %s: rejected by share access mask[0x%08X] "
1741                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1742                         smb_fname_str_dbg(smb_fname),
1743                         conn->share_access,
1744                         orig_access_mask, access_mask,
1745                         rejected_share_access));
1746                 return NT_STATUS_ACCESS_DENIED;
1747         }
1748
1749         *access_mask_out = access_mask;
1750         return NT_STATUS_OK;
1751 }
1752
1753 /****************************************************************************
1754  Remove the deferred open entry under lock.
1755 ****************************************************************************/
1756
1757 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1758                                 struct server_id pid)
1759 {
1760         struct share_mode_lock *lck = get_existing_share_mode_lock(
1761                 talloc_tos(), id);
1762         if (lck == NULL) {
1763                 DEBUG(0, ("could not get share mode lock\n"));
1764                 return;
1765         }
1766         del_deferred_open_entry(lck, mid, pid);
1767         TALLOC_FREE(lck);
1768 }
1769
1770 /****************************************************************************
1771  Return true if this is a state pointer to an asynchronous create.
1772 ****************************************************************************/
1773
1774 bool is_deferred_open_async(const void *ptr)
1775 {
1776         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1777
1778         return state->async_open;
1779 }
1780
1781 /****************************************************************************
1782  Open a file with a share mode. Passed in an already created files_struct *.
1783 ****************************************************************************/
1784
1785 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1786                             struct smb_request *req,
1787                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1788                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1789                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1790                             uint32 create_options,      /* options such as delete on close. */
1791                             uint32 new_dos_attributes,  /* attributes used for new file. */
1792                             int oplock_request,         /* internal Samba oplock codes. */
1793                                                         /* Information (FILE_EXISTS etc.) */
1794                             uint32_t private_flags,     /* Samba specific flags. */
1795                             int *pinfo,
1796                             files_struct *fsp)
1797 {
1798         struct smb_filename *smb_fname = fsp->fsp_name;
1799         int flags=0;
1800         int flags2=0;
1801         bool file_existed = VALID_STAT(smb_fname->st);
1802         bool def_acl = False;
1803         bool posix_open = False;
1804         bool new_file_created = False;
1805         bool clear_ads = false;
1806         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1807         mode_t new_unx_mode = (mode_t)0;
1808         mode_t unx_mode = (mode_t)0;
1809         int info;
1810         uint32 existing_dos_attributes = 0;
1811         struct timeval request_time = timeval_zero();
1812         struct share_mode_lock *lck = NULL;
1813         uint32 open_access_mask = access_mask;
1814         NTSTATUS status;
1815         char *parent_dir;
1816         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1817
1818         if (conn->printer) {
1819                 /*
1820                  * Printers are handled completely differently.
1821                  * Most of the passed parameters are ignored.
1822                  */
1823
1824                 if (pinfo) {
1825                         *pinfo = FILE_WAS_CREATED;
1826                 }
1827
1828                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1829                            smb_fname_str_dbg(smb_fname)));
1830
1831                 if (!req) {
1832                         DEBUG(0,("open_file_ntcreate: printer open without "
1833                                 "an SMB request!\n"));
1834                         return NT_STATUS_INTERNAL_ERROR;
1835                 }
1836
1837                 return print_spool_open(fsp, smb_fname->base_name,
1838                                         req->vuid);
1839         }
1840
1841         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1842                             NULL)) {
1843                 return NT_STATUS_NO_MEMORY;
1844         }
1845
1846         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1847                 posix_open = True;
1848                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1849                 new_dos_attributes = 0;
1850         } else {
1851                 /* Windows allows a new file to be created and
1852                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1853                    sent by the client. Do the same. */
1854
1855                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1856
1857                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1858                  * created new. */
1859                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1860                                      smb_fname, parent_dir);
1861         }
1862
1863         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1864                    "access_mask=0x%x share_access=0x%x "
1865                    "create_disposition = 0x%x create_options=0x%x "
1866                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1867                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1868                    access_mask, share_access, create_disposition,
1869                    create_options, (unsigned int)unx_mode, oplock_request,
1870                    (unsigned int)private_flags));
1871
1872         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1873                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1874                 return NT_STATUS_INTERNAL_ERROR;
1875         }
1876
1877         /*
1878          * Only non-internal opens can be deferred at all
1879          */
1880
1881         if (req) {
1882                 void *ptr;
1883                 if (get_deferred_open_message_state(req,
1884                                 &request_time,
1885                                 &ptr)) {
1886                         /* Remember the absolute time of the original
1887                            request with this mid. We'll use it later to
1888                            see if this has timed out. */
1889
1890                         /* If it was an async create retry, the file
1891                            didn't exist. */
1892
1893                         if (is_deferred_open_async(ptr)) {
1894                                 SET_STAT_INVALID(smb_fname->st);
1895                                 file_existed = false;
1896                         } else {
1897                                 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1898                                 /* Remove the deferred open entry under lock. */
1899                                 remove_deferred_open_entry(
1900                                         state->id, req->mid,
1901                                         messaging_server_id(req->sconn->msg_ctx));
1902                         }
1903
1904                         /* Ensure we don't reprocess this message. */
1905                         remove_deferred_open_message_smb(req->sconn, req->mid);
1906                 }
1907         }
1908
1909         if (!posix_open) {
1910                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1911                 if (file_existed) {
1912                         existing_dos_attributes = dos_mode(conn, smb_fname);
1913                 }
1914         }
1915
1916         /* ignore any oplock requests if oplocks are disabled */
1917         if (!lp_oplocks(SNUM(conn)) ||
1918             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1919                 /* Mask off everything except the private Samba bits. */
1920                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1921         }
1922
1923         /* this is for OS/2 long file names - say we don't support them */
1924         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1925                 /* OS/2 Workplace shell fix may be main code stream in a later
1926                  * release. */
1927                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1928                          "supported.\n"));
1929                 if (use_nt_status()) {
1930                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1931                 }
1932                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1933         }
1934
1935         switch( create_disposition ) {
1936                 /*
1937                  * Currently we're using FILE_SUPERSEDE as the same as
1938                  * FILE_OVERWRITE_IF but they really are
1939                  * different. FILE_SUPERSEDE deletes an existing file
1940                  * (requiring delete access) then recreates it.
1941                  */
1942                 case FILE_SUPERSEDE:
1943                         /* If file exists replace/overwrite. If file doesn't
1944                          * exist create. */
1945                         flags2 |= (O_CREAT | O_TRUNC);
1946                         clear_ads = true;
1947                         break;
1948
1949                 case FILE_OVERWRITE_IF:
1950                         /* If file exists replace/overwrite. If file doesn't
1951                          * exist create. */
1952                         flags2 |= (O_CREAT | O_TRUNC);
1953                         clear_ads = true;
1954                         break;
1955
1956                 case FILE_OPEN:
1957                         /* If file exists open. If file doesn't exist error. */
1958                         if (!file_existed) {
1959                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1960                                          "requested for file %s and file "
1961                                          "doesn't exist.\n",
1962                                          smb_fname_str_dbg(smb_fname)));
1963                                 errno = ENOENT;
1964                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1965                         }
1966                         break;
1967
1968                 case FILE_OVERWRITE:
1969                         /* If file exists overwrite. If file doesn't exist
1970                          * error. */
1971                         if (!file_existed) {
1972                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1973                                          "requested for file %s and file "
1974                                          "doesn't exist.\n",
1975                                          smb_fname_str_dbg(smb_fname) ));
1976                                 errno = ENOENT;
1977                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1978                         }
1979                         flags2 |= O_TRUNC;
1980                         clear_ads = true;
1981                         break;
1982
1983                 case FILE_CREATE:
1984                         /* If file exists error. If file doesn't exist
1985                          * create. */
1986                         if (file_existed) {
1987                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1988                                          "requested for file %s and file "
1989                                          "already exists.\n",
1990                                          smb_fname_str_dbg(smb_fname)));
1991                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1992                                         errno = EISDIR;
1993                                 } else {
1994                                         errno = EEXIST;
1995                                 }
1996                                 return map_nt_error_from_unix(errno);
1997                         }
1998                         flags2 |= (O_CREAT|O_EXCL);
1999                         break;
2000
2001                 case FILE_OPEN_IF:
2002                         /* If file exists open. If file doesn't exist
2003                          * create. */
2004                         flags2 |= O_CREAT;
2005                         break;
2006
2007                 default:
2008                         return NT_STATUS_INVALID_PARAMETER;
2009         }
2010
2011         /* We only care about matching attributes on file exists and
2012          * overwrite. */
2013
2014         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
2015                              (create_disposition == FILE_OVERWRITE_IF))) {
2016                 if (!open_match_attributes(conn, existing_dos_attributes,
2017                                            new_dos_attributes,
2018                                            smb_fname->st.st_ex_mode,
2019                                            unx_mode, &new_unx_mode)) {
2020                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2021                                  "for file %s (%x %x) (0%o, 0%o)\n",
2022                                  smb_fname_str_dbg(smb_fname),
2023                                  existing_dos_attributes,
2024                                  new_dos_attributes,
2025                                  (unsigned int)smb_fname->st.st_ex_mode,
2026                                  (unsigned int)unx_mode ));
2027                         errno = EACCES;
2028                         return NT_STATUS_ACCESS_DENIED;
2029                 }
2030         }
2031
2032         status = smbd_calculate_access_mask(conn, smb_fname,
2033                                         access_mask,
2034                                         &access_mask); 
2035         if (!NT_STATUS_IS_OK(status)) {
2036                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2037                         "on file %s returned %s\n",
2038                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2039                 return status;
2040         }
2041
2042         open_access_mask = access_mask;
2043
2044         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2045                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2046         }
2047
2048         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2049                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2050                     access_mask));
2051
2052         /*
2053          * Note that we ignore the append flag as append does not
2054          * mean the same thing under DOS and Unix.
2055          */
2056
2057         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
2058                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2059                 /* DENY_DOS opens are always underlying read-write on the
2060                    file handle, no matter what the requested access mask
2061                     says. */
2062                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2063                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
2064                         flags = O_RDWR;
2065                 } else {
2066                         flags = O_WRONLY;
2067                 }
2068         } else {
2069                 flags = O_RDONLY;
2070         }
2071
2072         /*
2073          * Currently we only look at FILE_WRITE_THROUGH for create options.
2074          */
2075
2076 #if defined(O_SYNC)
2077         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2078                 flags2 |= O_SYNC;
2079         }
2080 #endif /* O_SYNC */
2081
2082         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2083                 flags2 |= O_APPEND;
2084         }
2085
2086         if (!posix_open && !CAN_WRITE(conn)) {
2087                 /*
2088                  * We should really return a permission denied error if either
2089                  * O_CREAT or O_TRUNC are set, but for compatibility with
2090                  * older versions of Samba we just AND them out.
2091                  */
2092                 flags2 &= ~(O_CREAT|O_TRUNC);
2093         }
2094
2095         /*
2096          * Ensure we can't write on a read-only share or file.
2097          */
2098
2099         if (flags != O_RDONLY && file_existed &&
2100             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2101                 DEBUG(5,("open_file_ntcreate: write access requested for "
2102                          "file %s on read only %s\n",
2103                          smb_fname_str_dbg(smb_fname),
2104                          !CAN_WRITE(conn) ? "share" : "file" ));
2105                 errno = EACCES;
2106                 return NT_STATUS_ACCESS_DENIED;
2107         }
2108
2109         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2110         fsp->share_access = share_access;
2111         fsp->fh->private_options = private_flags;
2112         fsp->access_mask = open_access_mask; /* We change this to the
2113                                               * requested access_mask after
2114                                               * the open is done. */
2115         fsp->posix_open = posix_open;
2116
2117         /* Ensure no SAMBA_PRIVATE bits can be set. */
2118         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2119
2120         if (timeval_is_zero(&request_time)) {
2121                 request_time = fsp->open_time;
2122         }
2123
2124         if (file_existed) {
2125                 struct share_mode_entry *batch_entry = NULL;
2126                 struct share_mode_entry *exclusive_entry = NULL;
2127                 bool got_level2_oplock = false;
2128                 bool got_a_none_oplock = false;
2129                 struct file_id id;
2130
2131                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2132                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2133
2134                 lck = get_share_mode_lock(talloc_tos(), id,
2135                                           conn->connectpath,
2136                                           smb_fname, &old_write_time);
2137                 if (lck == NULL) {
2138                         DEBUG(0, ("Could not get share mode lock\n"));
2139                         return NT_STATUS_SHARING_VIOLATION;
2140                 }
2141
2142                 /* Get the types we need to examine. */
2143                 find_oplock_types(fsp,
2144                                 oplock_request,
2145                                 lck,
2146                                 &batch_entry,
2147                                 &exclusive_entry,
2148                                 &got_level2_oplock,
2149                                 &got_a_none_oplock);
2150
2151                 /* First pass - send break only on batch oplocks. */
2152                 if ((req != NULL) &&
2153                                 delay_for_batch_oplocks(fsp,
2154                                         req->mid,
2155                                         oplock_request,
2156                                         batch_entry)) {
2157                         schedule_defer_open(lck, request_time, req);
2158                         TALLOC_FREE(lck);
2159                         return NT_STATUS_SHARING_VIOLATION;
2160                 }
2161
2162                 /* Use the client requested access mask here, not the one we
2163                  * open with. */
2164                 status = open_mode_check(conn, lck, fsp->name_hash,
2165                                         access_mask, share_access,
2166                                          create_options, &file_existed);
2167
2168                 if (NT_STATUS_IS_OK(status)) {
2169                         /* We might be going to allow this open. Check oplock
2170                          * status again. */
2171                         /* Second pass - send break for both batch or
2172                          * exclusive oplocks. */
2173                         if ((req != NULL) &&
2174                                         delay_for_exclusive_oplocks(
2175                                                 fsp,
2176                                                 req->mid,
2177                                                 oplock_request,
2178                                                 exclusive_entry)) {
2179                                 schedule_defer_open(lck, request_time, req);
2180                                 TALLOC_FREE(lck);
2181                                 return NT_STATUS_SHARING_VIOLATION;
2182                         }
2183                 }
2184
2185                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2186                         /* DELETE_PENDING is not deferred for a second */
2187                         TALLOC_FREE(lck);
2188                         return status;
2189                 }
2190
2191                 grant_fsp_oplock_type(fsp,
2192                                 oplock_request,
2193                                 got_level2_oplock,
2194                                 got_a_none_oplock);
2195
2196                 if (!NT_STATUS_IS_OK(status)) {
2197                         uint32 can_access_mask;
2198                         bool can_access = True;
2199
2200                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2201
2202                         /* Check if this can be done with the deny_dos and fcb
2203                          * calls. */
2204                         if (private_flags &
2205                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2206                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2207                                 if (req == NULL) {
2208                                         DEBUG(0, ("DOS open without an SMB "
2209                                                   "request!\n"));
2210                                         TALLOC_FREE(lck);
2211                                         return NT_STATUS_INTERNAL_ERROR;
2212                                 }
2213
2214                                 /* Use the client requested access mask here,
2215                                  * not the one we open with. */
2216                                 status = fcb_or_dos_open(req,
2217                                                         conn,
2218                                                         fsp,
2219                                                         smb_fname,
2220                                                         id,
2221                                                         req->smbpid,
2222                                                         req->vuid,
2223                                                         access_mask,
2224                                                         share_access,
2225                                                         create_options);
2226
2227                                 if (NT_STATUS_IS_OK(status)) {
2228                                         TALLOC_FREE(lck);
2229                                         if (pinfo) {
2230                                                 *pinfo = FILE_WAS_OPENED;
2231                                         }
2232                                         return NT_STATUS_OK;
2233                                 }
2234                         }
2235
2236                         /*
2237                          * This next line is a subtlety we need for
2238                          * MS-Access. If a file open will fail due to share
2239                          * permissions and also for security (access) reasons,
2240                          * we need to return the access failed error, not the
2241                          * share error. We can't open the file due to kernel
2242                          * oplock deadlock (it's possible we failed above on
2243                          * the open_mode_check()) so use a userspace check.
2244                          */
2245
2246                         if (flags & O_RDWR) {
2247                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2248                         } else if (flags & O_WRONLY) {
2249                                 can_access_mask = FILE_WRITE_DATA;
2250                         } else {
2251                                 can_access_mask = FILE_READ_DATA;
2252                         }
2253
2254                         if (((can_access_mask & FILE_WRITE_DATA) &&
2255                                 !CAN_WRITE(conn)) ||
2256                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2257                                                 smb_fname, can_access_mask))) {
2258                                 can_access = False;
2259                         }
2260
2261                         /*
2262                          * If we're returning a share violation, ensure we
2263                          * cope with the braindead 1 second delay.
2264                          */
2265
2266                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2267                             lp_defer_sharing_violations()) {
2268                                 struct timeval timeout;
2269                                 struct deferred_open_record state;
2270                                 int timeout_usecs;
2271
2272                                 /* this is a hack to speed up torture tests
2273                                    in 'make test' */
2274                                 timeout_usecs = lp_parm_int(SNUM(conn),
2275                                                             "smbd","sharedelay",
2276                                                             SHARING_VIOLATION_USEC_WAIT);
2277
2278                                 /* This is a relative time, added to the absolute
2279                                    request_time value to get the absolute timeout time.
2280                                    Note that if this is the second or greater time we enter
2281                                    this codepath for this particular request mid then
2282                                    request_time is left as the absolute time of the *first*
2283                                    time this request mid was processed. This is what allows
2284                                    the request to eventually time out. */
2285
2286                                 timeout = timeval_set(0, timeout_usecs);
2287
2288                                 /* Nothing actually uses state.delayed_for_oplocks
2289                                    but it's handy to differentiate in debug messages
2290                                    between a 30 second delay due to oplock break, and
2291                                    a 1 second delay for share mode conflicts. */
2292
2293                                 state.delayed_for_oplocks = False;
2294                                 state.async_open = false;
2295                                 state.id = id;
2296
2297                                 if ((req != NULL)
2298                                     && !request_timed_out(request_time,
2299                                                           timeout)) {
2300                                         defer_open(lck, request_time, timeout,
2301                                                    req, &state);
2302                                 }
2303                         }
2304
2305                         TALLOC_FREE(lck);
2306                         if (can_access) {
2307                                 /*
2308                                  * We have detected a sharing violation here
2309                                  * so return the correct error code
2310                                  */
2311                                 status = NT_STATUS_SHARING_VIOLATION;
2312                         } else {
2313                                 status = NT_STATUS_ACCESS_DENIED;
2314                         }
2315                         return status;
2316                 }
2317
2318                 /*
2319                  * We exit this block with the share entry *locked*.....
2320                  */
2321         }
2322
2323         SMB_ASSERT(!file_existed || (lck != NULL));
2324
2325         /*
2326          * Ensure we pay attention to default ACLs on directories if required.
2327          */
2328
2329         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2330             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2331                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2332         }
2333
2334         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2335                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2336                  (unsigned int)flags, (unsigned int)flags2,
2337                  (unsigned int)unx_mode, (unsigned int)access_mask,
2338                  (unsigned int)open_access_mask));
2339
2340         /*
2341          * open_file strips any O_TRUNC flags itself.
2342          */
2343
2344         fsp_open = open_file(fsp, conn, req, parent_dir,
2345                              flags|flags2, unx_mode, access_mask,
2346                              open_access_mask, &new_file_created);
2347
2348         if (!NT_STATUS_IS_OK(fsp_open)) {
2349                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2350                         schedule_async_open(request_time, req);
2351                 }
2352                 TALLOC_FREE(lck);
2353                 return fsp_open;
2354         }
2355
2356         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2357                 /*
2358                  * The file did exist, but some other (local or NFS)
2359                  * process either renamed/unlinked and re-created the
2360                  * file with different dev/ino after we walked the path,
2361                  * but before we did the open. We could retry the
2362                  * open but it's a rare enough case it's easier to
2363                  * just fail the open to prevent creating any problems
2364                  * in the open file db having the wrong dev/ino key.
2365                  */
2366                 TALLOC_FREE(lck);
2367                 fd_close(fsp);
2368                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2369                         "Old (dev=0x%llu, ino =0x%llu). "
2370                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2371                         " with NT_STATUS_ACCESS_DENIED.\n",
2372                          smb_fname_str_dbg(smb_fname),
2373                          (unsigned long long)saved_stat.st_ex_dev,
2374                          (unsigned long long)saved_stat.st_ex_ino,
2375                          (unsigned long long)smb_fname->st.st_ex_dev,
2376                          (unsigned long long)smb_fname->st.st_ex_ino));
2377                 return NT_STATUS_ACCESS_DENIED;
2378         }
2379
2380         if (!file_existed) {
2381                 struct share_mode_entry *batch_entry = NULL;
2382                 struct share_mode_entry *exclusive_entry = NULL;
2383                 bool got_level2_oplock = false;
2384                 bool got_a_none_oplock = false;
2385                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2386                 struct file_id id;
2387                 /*
2388                  * Deal with the race condition where two smbd's detect the
2389                  * file doesn't exist and do the create at the same time. One
2390                  * of them will win and set a share mode, the other (ie. this
2391                  * one) should check if the requested share mode for this
2392                  * create is allowed.
2393                  */
2394
2395                 /*
2396                  * Now the file exists and fsp is successfully opened,
2397                  * fsp->dev and fsp->inode are valid and should replace the
2398                  * dev=0,inode=0 from a non existent file. Spotted by
2399                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2400                  */
2401
2402                 id = fsp->file_id;
2403
2404                 lck = get_share_mode_lock(talloc_tos(), id,
2405                                           conn->connectpath,
2406                                           smb_fname, &old_write_time);
2407
2408                 if (lck == NULL) {
2409                         DEBUG(0, ("open_file_ntcreate: Could not get share "
2410                                   "mode lock for %s\n",
2411                                   smb_fname_str_dbg(smb_fname)));
2412                         fd_close(fsp);
2413                         return NT_STATUS_SHARING_VIOLATION;
2414                 }
2415
2416                 /* Get the types we need to examine. */
2417                 find_oplock_types(fsp,
2418                                 oplock_request,
2419                                 lck,
2420                                 &batch_entry,
2421                                 &exclusive_entry,
2422                                 &got_level2_oplock,
2423                                 &got_a_none_oplock);
2424
2425                 /* First pass - send break only on batch oplocks. */
2426                 if ((req != NULL) &&
2427                                 delay_for_batch_oplocks(fsp,
2428                                         req->mid,
2429                                         oplock_request,
2430                                         batch_entry)) {
2431                         schedule_defer_open(lck, request_time, req);
2432                         TALLOC_FREE(lck);
2433                         fd_close(fsp);
2434                         return NT_STATUS_SHARING_VIOLATION;
2435                 }
2436
2437                 status = open_mode_check(conn, lck, fsp->name_hash,
2438                                         access_mask, share_access,
2439                                          create_options, &file_existed);
2440
2441                 if (NT_STATUS_IS_OK(status)) {
2442                         /* We might be going to allow this open. Check oplock
2443                          * status again. */
2444                         /* Second pass - send break for both batch or
2445                          * exclusive oplocks. */
2446                         if ((req != NULL) &&
2447                                         delay_for_exclusive_oplocks(
2448                                                 fsp,
2449                                                 req->mid,
2450                                                 oplock_request,
2451                                                 exclusive_entry)) {
2452                                 schedule_defer_open(lck, request_time, req);
2453                                 TALLOC_FREE(lck);
2454                                 fd_close(fsp);
2455                                 return NT_STATUS_SHARING_VIOLATION;
2456                         }
2457                 }
2458
2459                 if (!NT_STATUS_IS_OK(status)) {
2460                         struct deferred_open_record state;
2461
2462                         state.delayed_for_oplocks = False;
2463                         state.async_open = false;
2464                         state.id = id;
2465
2466                         /* Do it all over again immediately. In the second
2467                          * round we will find that the file existed and handle
2468                          * the DELETE_PENDING and FCB cases correctly. No need
2469                          * to duplicate the code here. Essentially this is a
2470                          * "goto top of this function", but don't tell
2471                          * anybody... */
2472
2473                         if (req != NULL) {
2474                                 defer_open(lck, request_time, timeval_zero(),
2475                                            req, &state);
2476                         }
2477                         TALLOC_FREE(lck);
2478                         fd_close(fsp);
2479                         return status;
2480                 }
2481
2482                 grant_fsp_oplock_type(fsp,
2483                                 oplock_request,
2484                                 got_level2_oplock,
2485                                 got_a_none_oplock);
2486
2487                 /*
2488                  * We exit this block with the share entry *locked*.....
2489                  */
2490
2491         }
2492
2493         SMB_ASSERT(lck != NULL);
2494
2495         /* Delete streams if create_disposition requires it */
2496         if (!new_file_created && clear_ads &&
2497             !is_ntfs_stream_smb_fname(smb_fname)) {
2498                 status = delete_all_streams(conn, smb_fname->base_name);
2499                 if (!NT_STATUS_IS_OK(status)) {
2500                         TALLOC_FREE(lck);
2501                         fd_close(fsp);
2502                         return status;
2503                 }
2504         }
2505
2506         /* note that we ignore failure for the following. It is
2507            basically a hack for NFS, and NFS will never set one of
2508            these only read them. Nobody but Samba can ever set a deny
2509            mode and we have already checked our more authoritative
2510            locking database for permission to set this deny mode. If
2511            the kernel refuses the operations then the kernel is wrong.
2512            note that GPFS supports it as well - jmcd */
2513
2514         if (fsp->fh->fd != -1) {
2515                 int ret_flock;
2516                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2517                 if(ret_flock == -1 ){
2518
2519                         TALLOC_FREE(lck);
2520                         fd_close(fsp);
2521
2522                         return NT_STATUS_SHARING_VIOLATION;
2523                 }
2524         }
2525
2526         /*
2527          * At this point onwards, we can guarentee that the share entry
2528          * is locked, whether we created the file or not, and that the
2529          * deny mode is compatible with all current opens.
2530          */
2531
2532         /*
2533          * If requested, truncate the file.
2534          */
2535
2536         if (!new_file_created && (flags2&O_TRUNC)) {
2537                 /*
2538                  * We are modifying the file after open - update the stat
2539                  * struct..
2540                  */
2541                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2542                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2543                         status = map_nt_error_from_unix(errno);
2544                         TALLOC_FREE(lck);
2545                         fd_close(fsp);
2546                         return status;
2547                 }
2548         }
2549
2550         /*
2551          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2552          * but we don't have to store this - just ignore it on access check.
2553          */
2554         if (conn->sconn->using_smb2) {
2555                 /*
2556                  * SMB2 doesn't return it (according to Microsoft tests).
2557                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2558                  * File created with access = 0x7 (Read, Write, Delete)
2559                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2560                  */
2561                 fsp->access_mask = access_mask;
2562         } else {
2563                 /* But SMB1 does. */
2564                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2565         }
2566
2567         if (file_existed) {
2568                 /* stat opens on existing files don't get oplocks. */
2569                 if (is_stat_open(open_access_mask)) {
2570                         fsp->oplock_type = NO_OPLOCK;
2571                 }
2572         }
2573
2574         if (new_file_created) {
2575                 info = FILE_WAS_CREATED;
2576         } else {
2577                 if (flags2 & O_TRUNC) {
2578                         info = FILE_WAS_OVERWRITTEN;
2579                 } else {
2580                         info = FILE_WAS_OPENED;
2581                 }
2582         }
2583
2584         if (pinfo) {
2585                 *pinfo = info;
2586         }
2587
2588         /*
2589          * Setup the oplock info in both the shared memory and
2590          * file structs.
2591          */
2592
2593         status = set_file_oplock(fsp, fsp->oplock_type);
2594         if (!NT_STATUS_IS_OK(status)) {
2595                 /*
2596                  * Could not get the kernel oplock or there are byte-range
2597                  * locks on the file.
2598                  */
2599                 fsp->oplock_type = NO_OPLOCK;
2600         }
2601
2602         set_share_mode(lck, fsp, get_current_uid(conn),
2603                         req ? req->mid : 0,
2604                        fsp->oplock_type);
2605
2606         /* Handle strange delete on close create semantics. */
2607         if (create_options & FILE_DELETE_ON_CLOSE) {
2608
2609                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2610
2611                 if (!NT_STATUS_IS_OK(status)) {
2612                         /* Remember to delete the mode we just added. */
2613                         del_share_mode(lck, fsp);
2614                         TALLOC_FREE(lck);
2615                         fd_close(fsp);
2616                         return status;
2617                 }
2618                 /* Note that here we set the *inital* delete on close flag,
2619                    not the regular one. The magic gets handled in close. */
2620                 fsp->initial_delete_on_close = True;
2621         }
2622
2623         if (info != FILE_WAS_OPENED) {
2624                 /* Files should be initially set as archive */
2625                 if (lp_map_archive(SNUM(conn)) ||
2626                     lp_store_dos_attributes(SNUM(conn))) {
2627                         if (!posix_open) {
2628                                 if (file_set_dosmode(conn, smb_fname,
2629                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2630                                             parent_dir, true) == 0) {
2631                                         unx_mode = smb_fname->st.st_ex_mode;
2632                                 }
2633                         }
2634                 }
2635         }
2636
2637         /* Determine sparse flag. */
2638         if (posix_open) {
2639                 /* POSIX opens are sparse by default. */
2640                 fsp->is_sparse = true;
2641         } else {
2642                 fsp->is_sparse = (file_existed &&
2643                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2644         }
2645
2646         /*
2647          * Take care of inherited ACLs on created files - if default ACL not
2648          * selected.
2649          */
2650
2651         if (!posix_open && new_file_created && !def_acl) {
2652
2653                 int saved_errno = errno; /* We might get ENOSYS in the next
2654                                           * call.. */
2655
2656                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2657                     errno == ENOSYS) {
2658                         errno = saved_errno; /* Ignore ENOSYS */
2659                 }
2660
2661         } else if (new_unx_mode) {
2662
2663                 int ret = -1;
2664
2665                 /* Attributes need changing. File already existed. */
2666
2667                 {
2668                         int saved_errno = errno; /* We might get ENOSYS in the
2669                                                   * next call.. */
2670                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2671
2672                         if (ret == -1 && errno == ENOSYS) {
2673                                 errno = saved_errno; /* Ignore ENOSYS */
2674                         } else {
2675                                 DEBUG(5, ("open_file_ntcreate: reset "
2676                                           "attributes of file %s to 0%o\n",
2677                                           smb_fname_str_dbg(smb_fname),
2678                                           (unsigned int)new_unx_mode));
2679                                 ret = 0; /* Don't do the fchmod below. */
2680                         }
2681                 }
2682
2683                 if ((ret == -1) &&
2684                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2685                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2686                                   "attributes of file %s to 0%o\n",
2687                                   smb_fname_str_dbg(smb_fname),
2688                                   (unsigned int)new_unx_mode));
2689         }
2690
2691         /* If this is a successful open, we must remove any deferred open
2692          * records. */
2693         if (req != NULL) {
2694                 del_deferred_open_entry(lck, req->mid,
2695                                         messaging_server_id(req->sconn->msg_ctx));
2696         }
2697         TALLOC_FREE(lck);
2698
2699         return NT_STATUS_OK;
2700 }
2701
2702
2703 /****************************************************************************
2704  Open a file for for write to ensure that we can fchmod it.
2705 ****************************************************************************/
2706
2707 NTSTATUS open_file_fchmod(connection_struct *conn,
2708                           struct smb_filename *smb_fname,
2709                           files_struct **result)
2710 {
2711         if (!VALID_STAT(smb_fname->st)) {
2712                 return NT_STATUS_INVALID_PARAMETER;
2713         }
2714
2715         return SMB_VFS_CREATE_FILE(
2716                 conn,                                   /* conn */
2717                 NULL,                                   /* req */
2718                 0,                                      /* root_dir_fid */
2719                 smb_fname,                              /* fname */
2720                 FILE_WRITE_DATA,                        /* access_mask */
2721                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2722                     FILE_SHARE_DELETE),
2723                 FILE_OPEN,                              /* create_disposition*/
2724                 0,                                      /* create_options */
2725                 0,                                      /* file_attributes */
2726                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2727                 0,                                      /* allocation_size */
2728                 0,                                      /* private_flags */
2729                 NULL,                                   /* sd */
2730                 NULL,                                   /* ea_list */
2731                 result,                                 /* result */
2732                 NULL);                                  /* pinfo */
2733 }
2734
2735 static NTSTATUS mkdir_internal(connection_struct *conn,
2736                                struct smb_filename *smb_dname,
2737                                uint32 file_attributes)
2738 {
2739         mode_t mode;
2740         char *parent_dir = NULL;
2741         NTSTATUS status;
2742         bool posix_open = false;
2743         bool need_re_stat = false;
2744         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2745
2746         if(access_mask & ~(conn->share_access)) {
2747                 DEBUG(5,("mkdir_internal: failing share access "
2748                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2749                 return NT_STATUS_ACCESS_DENIED;
2750         }
2751
2752         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2753                             NULL)) {
2754                 return NT_STATUS_NO_MEMORY;
2755         }
2756
2757         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2758                 posix_open = true;
2759                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2760         } else {
2761                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2762         }
2763
2764         status = check_parent_access(conn,
2765                                         smb_dname,
2766                                         access_mask);
2767         if(!NT_STATUS_IS_OK(status)) {
2768                 DEBUG(5,("mkdir_internal: check_parent_access "
2769                         "on directory %s for path %s returned %s\n",
2770                         parent_dir,
2771                         smb_dname->base_name,
2772                         nt_errstr(status) ));
2773                 return status;
2774         }
2775
2776         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2777                 return map_nt_error_from_unix(errno);
2778         }
2779
2780         /* Ensure we're checking for a symlink here.... */
2781         /* We don't want to get caught by a symlink racer. */
2782
2783         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2784                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2785                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2786                 return map_nt_error_from_unix(errno);
2787         }
2788
2789         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2790                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2791                           smb_fname_str_dbg(smb_dname)));
2792                 return NT_STATUS_NOT_A_DIRECTORY;
2793         }
2794
2795         if (lp_store_dos_attributes(SNUM(conn))) {
2796                 if (!posix_open) {
2797                         file_set_dosmode(conn, smb_dname,
2798                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2799                                          parent_dir, true);
2800                 }
2801         }
2802
2803         if (lp_inherit_perms(SNUM(conn))) {
2804                 inherit_access_posix_acl(conn, parent_dir,
2805                                          smb_dname->base_name, mode);
2806                 need_re_stat = true;
2807         }
2808
2809         if (!posix_open) {
2810                 /*
2811                  * Check if high bits should have been set,
2812                  * then (if bits are missing): add them.
2813                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2814                  * dir.
2815                  */
2816                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2817                     (mode & ~smb_dname->st.st_ex_mode)) {
2818                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2819                                       (smb_dname->st.st_ex_mode |
2820                                           (mode & ~smb_dname->st.st_ex_mode)));
2821                         need_re_stat = true;
2822                 }
2823         }
2824
2825         /* Change the owner if required. */
2826         if (lp_inherit_owner(SNUM(conn))) {
2827                 change_dir_owner_to_parent(conn, parent_dir,
2828                                            smb_dname->base_name,
2829                                            &smb_dname->st);
2830                 need_re_stat = true;
2831         }
2832
2833         if (need_re_stat) {
2834                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2835                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2836                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2837                         return map_nt_error_from_unix(errno);
2838                 }
2839         }
2840
2841         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2842                      smb_dname->base_name);
2843
2844         return NT_STATUS_OK;
2845 }
2846
2847 /****************************************************************************
2848  Open a directory from an NT SMB call.
2849 ****************************************************************************/
2850
2851 static NTSTATUS open_directory(connection_struct *conn,
2852                                struct smb_request *req,
2853                                struct smb_filename *smb_dname,
2854                                uint32 access_mask,
2855                                uint32 share_access,
2856                                uint32 create_disposition,
2857                                uint32 create_options,
2858                                uint32 file_attributes,
2859                                int *pinfo,
2860                                files_struct **result)
2861 {
2862         files_struct *fsp = NULL;
2863         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2864         struct share_mode_lock *lck = NULL;
2865         NTSTATUS status;
2866         struct timespec mtimespec;
2867         int info = 0;
2868
2869         if (is_ntfs_stream_smb_fname(smb_dname)) {
2870                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2871                           smb_fname_str_dbg(smb_dname)));
2872                 return NT_STATUS_NOT_A_DIRECTORY;
2873         }
2874
2875         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2876                 /* Ensure we have a directory attribute. */
2877                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2878         }
2879
2880         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2881                  "share_access = 0x%x create_options = 0x%x, "
2882                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2883                  smb_fname_str_dbg(smb_dname),
2884                  (unsigned int)access_mask,
2885                  (unsigned int)share_access,
2886                  (unsigned int)create_options,
2887                  (unsigned int)create_disposition,
2888                  (unsigned int)file_attributes));
2889
2890         status = smbd_calculate_access_mask(conn, smb_dname,
2891                                             access_mask, &access_mask);
2892         if (!NT_STATUS_IS_OK(status)) {
2893                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2894                         "on file %s returned %s\n",
2895                         smb_fname_str_dbg(smb_dname),
2896                         nt_errstr(status)));
2897                 return status;
2898         }
2899
2900         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2901                         !security_token_has_privilege(get_current_nttok(conn),
2902                                         SEC_PRIV_SECURITY)) {
2903                 DEBUG(10, ("open_directory: open on %s "
2904                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2905                         smb_fname_str_dbg(smb_dname)));
2906                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2907         }
2908
2909         switch( create_disposition ) {
2910                 case FILE_OPEN:
2911
2912                         if (!dir_existed) {
2913                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2914                         }
2915
2916                         info = FILE_WAS_OPENED;
2917                         break;
2918
2919                 case FILE_CREATE:
2920
2921                         /* If directory exists error. If directory doesn't
2922                          * exist create. */
2923
2924                         if (dir_existed) {
2925                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2926                                 DEBUG(2, ("open_directory: unable to create "
2927                                           "%s. Error was %s\n",
2928                                           smb_fname_str_dbg(smb_dname),
2929                                           nt_errstr(status)));
2930                                 return status;
2931                         }
2932
2933                         status = mkdir_internal(conn, smb_dname,
2934                                                 file_attributes);
2935
2936                         if (!NT_STATUS_IS_OK(status)) {
2937                                 DEBUG(2, ("open_directory: unable to create "
2938                                           "%s. Error was %s\n",
2939                                           smb_fname_str_dbg(smb_dname),
2940                                           nt_errstr(status)));
2941                                 return status;
2942                         }
2943
2944                         info = FILE_WAS_CREATED;
2945                         break;
2946
2947                 case FILE_OPEN_IF:
2948                         /*
2949                          * If directory exists open. If directory doesn't
2950                          * exist create.
2951                          */
2952
2953                         if (dir_existed) {
2954                                 status = NT_STATUS_OK;
2955                                 info = FILE_WAS_OPENED;
2956                         } else {
2957                                 status = mkdir_internal(conn, smb_dname,
2958                                                 file_attributes);
2959
2960                                 if (NT_STATUS_IS_OK(status)) {
2961                                         info = FILE_WAS_CREATED;
2962                                 } else {
2963                                         /* Cope with create race. */
2964                                         if (!NT_STATUS_EQUAL(status,
2965                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2966                                                 DEBUG(2, ("open_directory: unable to create "
2967                                                         "%s. Error was %s\n",
2968                                                         smb_fname_str_dbg(smb_dname),
2969                                                         nt_errstr(status)));
2970                                                 return status;
2971                                         }
2972                                         info = FILE_WAS_OPENED;
2973                                 }
2974                         }
2975
2976                         break;
2977
2978                 case FILE_SUPERSEDE:
2979                 case FILE_OVERWRITE:
2980                 case FILE_OVERWRITE_IF:
2981                 default:
2982                         DEBUG(5,("open_directory: invalid create_disposition "
2983                                  "0x%x for directory %s\n",
2984                                  (unsigned int)create_disposition,
2985                                  smb_fname_str_dbg(smb_dname)));
2986                         return NT_STATUS_INVALID_PARAMETER;
2987         }
2988
2989         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2990                 DEBUG(5,("open_directory: %s is not a directory !\n",
2991                          smb_fname_str_dbg(smb_dname)));
2992                 return NT_STATUS_NOT_A_DIRECTORY;
2993         }
2994
2995         if (info == FILE_WAS_OPENED) {
2996                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2997                 if (!NT_STATUS_IS_OK(status)) {
2998                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2999                                 "file %s failed with %s\n",
3000                                 smb_fname_str_dbg(smb_dname),
3001                                 nt_errstr(status)));
3002                         return status;
3003                 }
3004         }
3005
3006         status = file_new(req, conn, &fsp);
3007         if(!NT_STATUS_IS_OK(status)) {
3008                 return status;
3009         }
3010
3011         /*
3012          * Setup the files_struct for it.
3013          */
3014
3015         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3016         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3017         fsp->file_pid = req ? req->smbpid : 0;
3018         fsp->can_lock = False;
3019         fsp->can_read = False;
3020         fsp->can_write = False;
3021
3022         fsp->share_access = share_access;
3023         fsp->fh->private_options = 0;
3024         /*
3025          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3026          */
3027         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3028         fsp->print_file = NULL;
3029         fsp->modified = False;
3030         fsp->oplock_type = NO_OPLOCK;
3031         fsp->sent_oplock_break = NO_BREAK_SENT;
3032         fsp->is_directory = True;
3033         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3034         status = fsp_set_smb_fname(fsp, smb_dname);
3035         if (!NT_STATUS_IS_OK(status)) {
3036                 file_free(req, fsp);
3037                 return status;
3038         }
3039
3040         mtimespec = smb_dname->st.st_ex_mtime;
3041
3042 #ifdef O_DIRECTORY
3043         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3044 #else
3045         /* POSIX allows us to open a directory with O_RDONLY. */
3046         status = fd_open(conn, fsp, O_RDONLY, 0);
3047 #endif
3048         if (!NT_STATUS_IS_OK(status)) {
3049                 DEBUG(5, ("open_directory: Could not open fd for "
3050                         "%s (%s)\n",
3051                         smb_fname_str_dbg(smb_dname),
3052                         nt_errstr(status)));
3053                 file_free(req, fsp);
3054                 return status;
3055         }
3056
3057         status = vfs_stat_fsp(fsp);
3058         if (!NT_STATUS_IS_OK(status)) {
3059                 fd_close(fsp);
3060                 file_free(req, fsp);
3061                 return status;
3062         }
3063
3064         /* Ensure there was no race condition. */
3065         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3066                 DEBUG(5,("open_directory: stat struct differs for "
3067                         "directory %s.\n",
3068                         smb_fname_str_dbg(smb_dname)));
3069                 fd_close(fsp);
3070                 file_free(req, fsp);
3071                 return NT_STATUS_ACCESS_DENIED;
3072         }
3073
3074         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3075                                   conn->connectpath, smb_dname,
3076                                   &mtimespec);
3077
3078         if (lck == NULL) {
3079                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3080                           "%s\n", smb_fname_str_dbg(smb_dname)));
3081                 fd_close(fsp);
3082                 file_free(req, fsp);
3083                 return NT_STATUS_SHARING_VIOLATION;
3084         }
3085
3086         status = open_mode_check(conn, lck, fsp->name_hash,
3087                                 access_mask, share_access,
3088                                  create_options, &dir_existed);
3089
3090         if (!NT_STATUS_IS_OK(status)) {
3091                 TALLOC_FREE(lck);
3092                 fd_close(fsp);
3093                 file_free(req, fsp);
3094                 return status;
3095         }
3096
3097         set_share_mode(lck, fsp, get_current_uid(conn),
3098                         req ? req->mid : 0, NO_OPLOCK);
3099
3100         /* For directories the delete on close bit at open time seems
3101            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3102         if (create_options & FILE_DELETE_ON_CLOSE) {
3103                 status = can_set_delete_on_close(fsp, 0);
3104                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3105                         TALLOC_FREE(lck);
3106                         fd_close(fsp);
3107                         file_free(req, fsp);
3108                         return status;
3109                 }
3110
3111                 if (NT_STATUS_IS_OK(status)) {
3112                         /* Note that here we set the *inital* delete on close flag,
3113                            not the regular one. The magic gets handled in close. */
3114                         fsp->initial_delete_on_close = True;
3115                 }
3116         }
3117
3118         TALLOC_FREE(lck);
3119
3120         if (pinfo) {
3121                 *pinfo = info;
3122         }
3123
3124         *result = fsp;
3125         return NT_STATUS_OK;
3126 }
3127
3128 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3129                           struct smb_filename *smb_dname)
3130 {
3131         NTSTATUS status;
3132         files_struct *fsp;
3133
3134         status = SMB_VFS_CREATE_FILE(
3135                 conn,                                   /* conn */
3136                 req,                                    /* req */
3137                 0,                                      /* root_dir_fid */
3138                 smb_dname,                              /* fname */
3139                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3140                 FILE_SHARE_NONE,                        /* share_access */
3141                 FILE_CREATE,                            /* create_disposition*/
3142                 FILE_DIRECTORY_FILE,                    /* create_options */
3143                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3144                 0,                                      /* oplock_request */
3145                 0,                                      /* allocation_size */
3146                 0,                                      /* private_flags */
3147                 NULL,                                   /* sd */
3148                 NULL,                                   /* ea_list */
3149                 &fsp,                                   /* result */
3150                 NULL);                                  /* pinfo */
3151
3152         if (NT_STATUS_IS_OK(status)) {
3153                 close_file(req, fsp, NORMAL_CLOSE);
3154         }
3155
3156         return status;
3157 }
3158
3159 /****************************************************************************
3160  Receive notification that one of our open files has been renamed by another
3161  smbd process.
3162 ****************************************************************************/
3163
3164 void msg_file_was_renamed(struct messaging_context *msg,
3165                           void *private_data,
3166                           uint32_t msg_type,
3167                           struct server_id server_id,
3168                           DATA_BLOB *data)
3169 {
3170         files_struct *fsp;
3171         char *frm = (char *)data->data;
3172         struct file_id id;
3173         const char *sharepath;
3174         const char *base_name;
3175         const char *stream_name;
3176         struct smb_filename *smb_fname = NULL;
3177         size_t sp_len, bn_len;
3178         NTSTATUS status;
3179         struct smbd_server_connection *sconn =
3180                 talloc_get_type_abort(private_data,
3181                 struct smbd_server_connection);
3182
3183         if (data->data == NULL
3184             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3185                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3186                           (int)data->length));
3187                 return;
3188         }
3189
3190         /* Unpack the message. */
3191         pull_file_id_24(frm, &id);
3192         sharepath = &frm[24];
3193         sp_len = strlen(sharepath);
3194         base_name = sharepath + sp_len + 1;
3195         bn_len = strlen(base_name);
3196         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3197
3198         /* stream_name must always be NULL if there is no stream. */
3199         if (stream_name[0] == '\0') {
3200                 stream_name = NULL;
3201         }
3202
3203         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3204                                             stream_name, NULL, &smb_fname);
3205         if (!NT_STATUS_IS_OK(status)) {
3206                 return;
3207         }
3208
3209         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3210                 "file_id %s\n",
3211                 sharepath, smb_fname_str_dbg(smb_fname),
3212                 file_id_string_tos(&id)));
3213
3214         for(fsp = file_find_di_first(sconn, id); fsp;
3215             fsp = file_find_di_next(fsp)) {
3216                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3217
3218                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3219                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3220                                 smb_fname_str_dbg(smb_fname)));
3221                         status = fsp_set_smb_fname(fsp, smb_fname);
3222                         if (!NT_STATUS_IS_OK(status)) {
3223                                 goto out;
3224                         }
3225                 } else {
3226                         /* TODO. JRA. */
3227                         /* Now we have the complete path we can work out if this is
3228                            actually within this share and adjust newname accordingly. */
3229                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3230                                 "not sharepath %s) "
3231                                 "%s from %s -> %s\n",
3232                                 fsp->conn->connectpath,
3233                                 sharepath,
3234                                 fsp_fnum_dbg(fsp),
3235                                 fsp_str_dbg(fsp),
3236                                 smb_fname_str_dbg(smb_fname)));
3237                 }
3238         }
3239  out:
3240         TALLOC_FREE(smb_fname);
3241         return;
3242 }
3243
3244 /*
3245  * If a main file is opened for delete, all streams need to be checked for
3246  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3247  * If that works, delete them all by setting the delete on close and close.
3248  */
3249
3250 NTSTATUS open_streams_for_delete(connection_struct *conn,
3251                                         const char *fname)
3252 {
3253         struct stream_struct *stream_info = NULL;
3254         files_struct **streams = NULL;
3255         int i;
3256         unsigned int num_streams = 0;
3257         TALLOC_CTX *frame = talloc_stackframe();
3258         NTSTATUS status;
3259
3260         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3261                                 &num_streams, &stream_info);
3262
3263         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3264             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3265                 DEBUG(10, ("no streams around\n"));
3266                 TALLOC_FREE(frame);
3267                 return NT_STATUS_OK;
3268         }
3269
3270         if (!NT_STATUS_IS_OK(status)) {
3271                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3272                            nt_errstr(status)));
3273                 goto fail;
3274         }
3275
3276         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3277                    num_streams));
3278
3279         if (num_streams == 0) {
3280                 TALLOC_FREE(frame);
3281                 return NT_STATUS_OK;
3282         }
3283
3284         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3285         if (streams == NULL) {
3286                 DEBUG(0, ("talloc failed\n"));
3287                 status = NT_STATUS_NO_MEMORY;
3288                 goto fail;
3289         }
3290
3291         for (i=0; i<num_streams; i++) {
3292                 struct smb_filename *smb_fname = NULL;
3293
3294                 if (strequal(stream_info[i].name, "::$DATA")) {
3295                         streams[i] = NULL;
3296                         continue;
3297                 }
3298
3299                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3300                                                     stream_info[i].name,
3301                                                     NULL, &smb_fname);
3302                 if (!NT_STATUS_IS_OK(status)) {
3303                         goto fail;
3304                 }
3305
3306                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3307                         DEBUG(10, ("Unable to stat stream: %s\n",
3308                                    smb_fname_str_dbg(smb_fname)));
3309                 }
3310
3311                 status = SMB_VFS_CREATE_FILE(
3312                          conn,                  /* conn */
3313                          NULL,                  /* req */
3314                          0,                     /* root_dir_fid */
3315                          smb_fname,             /* fname */
3316                          DELETE_ACCESS,         /* access_mask */
3317                          (FILE_SHARE_READ |     /* share_access */
3318                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3319                          FILE_OPEN,             /* create_disposition*/
3320                          0,                     /* create_options */
3321                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3322                          0,                     /* oplock_request */
3323                          0,                     /* allocation_size */
3324                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3325                          NULL,                  /* sd */
3326                          NULL,                  /* ea_list */
3327                          &streams[i],           /* result */
3328                          NULL);                 /* pinfo */
3329
3330                 if (!NT_STATUS_IS_OK(status)) {
3331                         DEBUG(10, ("Could not open stream %s: %s\n",
3332                                    smb_fname_str_dbg(smb_fname),
3333                                    nt_errstr(status)));
3334
3335                         TALLOC_FREE(smb_fname);
3336                         break;
3337                 }
3338                 TALLOC_FREE(smb_fname);
3339         }
3340
3341         /*
3342          * don't touch the variable "status" beyond this point :-)
3343          */
3344
3345         for (i -= 1 ; i >= 0; i--) {
3346                 if (streams[i] == NULL) {
3347                         continue;
3348                 }
3349
3350                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3351                            fsp_str_dbg(streams[i])));
3352                 close_file(NULL, streams[i], NORMAL_CLOSE);
3353         }
3354
3355  fail:
3356         TALLOC_FREE(frame);
3357         return status;
3358 }
3359
3360 /*********************************************************************
3361  Create a default ACL by inheriting from the parent. If no inheritance
3362  from the parent available, don't set anything. This will leave the actual
3363  permissions the new file or directory already got from the filesystem
3364  as the NT ACL when read.
3365 *********************************************************************/
3366
3367 static NTSTATUS inherit_new_acl(files_struct *fsp)
3368 {
3369         TALLOC_CTX *ctx = talloc_tos();
3370         char *parent_name = NULL;
3371         struct security_descriptor *parent_desc = NULL;
3372         NTSTATUS status = NT_STATUS_OK;
3373         struct security_descriptor *psd = NULL;
3374         struct dom_sid *owner_sid = NULL;
3375         struct dom_sid *group_sid = NULL;
3376         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3377         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3378         bool inheritable_components = false;
3379         size_t size = 0;
3380
3381         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3382                 return NT_STATUS_NO_MEMORY;
3383         }
3384
3385         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3386                                 parent_name,
3387                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3388                                 &parent_desc);
3389         if (!NT_STATUS_IS_OK(status)) {
3390                 return status;
3391         }
3392
3393         inheritable_components = sd_has_inheritable_components(parent_desc,
3394                                         fsp->is_directory);
3395
3396         if (!inheritable_components && !inherit_owner) {
3397                 /* Nothing to inherit and not setting owner. */
3398                 return NT_STATUS_OK;
3399         }
3400
3401         /* Create an inherited descriptor from the parent. */
3402
3403         if (DEBUGLEVEL >= 10) {
3404                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3405                         fsp_str_dbg(fsp) ));
3406                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3407         }
3408
3409         /* Inherit from parent descriptor if "inherit owner" set. */
3410         if (inherit_owner) {
3411                 owner_sid = parent_desc->owner_sid;
3412                 group_sid = parent_desc->group_sid;
3413         }
3414
3415         if (owner_sid == NULL) {
3416                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3417         }
3418         if (group_sid == NULL) {
3419                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3420         }
3421
3422         status = se_create_child_secdesc(ctx,
3423                         &psd,
3424                         &size,
3425