c747bde5569110fa5df70a2c78a37229f562e248
[bbaumbach/samba-autobuild/.git] / source3 / smbd / vfs.c
1 /*
2    Unix SMB/Netbios implementation.
3    Version 1.9.
4    VFS initialisation and support functions
5    Copyright (C) Tim Potter 1999
6    Copyright (C) Alexander Bokovoy 2002
7    Copyright (C) James Peach 2006
8    Copyright (C) Volker Lendecke 2009
9
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 3 of the License, or
13    (at your option) any later version.
14
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19
20    You should have received a copy of the GNU General Public License
21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
22
23    This work was sponsored by Optifacio Software Services, Inc.
24 */
25
26 #include "includes.h"
27 #include "system/filesys.h"
28 #include "smbd/smbd.h"
29 #include "smbd/globals.h"
30 #include "../lib/util/memcache.h"
31 #include "transfer_file.h"
32 #include "ntioctl.h"
33 #include "lib/util/tevent_unix.h"
34
35 #undef DBGC_CLASS
36 #define DBGC_CLASS DBGC_VFS
37
38 static_decl_vfs;
39
40 struct vfs_fsp_data {
41     struct vfs_fsp_data *next;
42     struct vfs_handle_struct *owner;
43     void (*destroy)(void *p_data);
44     void *_dummy_;
45     /* NOTE: This structure contains four pointers so that we can guarantee
46      * that the end of the structure is always both 4-byte and 8-byte aligned.
47      */
48 };
49
50 struct vfs_init_function_entry {
51         char *name;
52         struct vfs_init_function_entry *prev, *next;
53         const struct vfs_fn_pointers *fns;
54 };
55
56 /****************************************************************************
57     maintain the list of available backends
58 ****************************************************************************/
59
60 static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
61 {
62         struct vfs_init_function_entry *entry = backends;
63
64         DEBUG(10, ("vfs_find_backend_entry called for %s\n", name));
65
66         while(entry) {
67                 if (strcmp(entry->name, name)==0) return entry;
68                 entry = entry->next;
69         }
70
71         return NULL;
72 }
73
74 NTSTATUS smb_register_vfs(int version, const char *name,
75                           const struct vfs_fn_pointers *fns)
76 {
77         struct vfs_init_function_entry *entry = backends;
78
79         if ((version != SMB_VFS_INTERFACE_VERSION)) {
80                 DEBUG(0, ("Failed to register vfs module.\n"
81                           "The module was compiled against SMB_VFS_INTERFACE_VERSION %d,\n"
82                           "current SMB_VFS_INTERFACE_VERSION is %d.\n"
83                           "Please recompile against the current Samba Version!\n",  
84                           version, SMB_VFS_INTERFACE_VERSION));
85                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
86         }
87
88         if (!name || !name[0]) {
89                 DEBUG(0,("smb_register_vfs() called with NULL pointer or empty name!\n"));
90                 return NT_STATUS_INVALID_PARAMETER;
91         }
92
93         if (vfs_find_backend_entry(name)) {
94                 DEBUG(0,("VFS module %s already loaded!\n", name));
95                 return NT_STATUS_OBJECT_NAME_COLLISION;
96         }
97
98         entry = SMB_XMALLOC_P(struct vfs_init_function_entry);
99         entry->name = smb_xstrdup(name);
100         entry->fns = fns;
101
102         DLIST_ADD(backends, entry);
103         DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
104         return NT_STATUS_OK;
105 }
106
107 /****************************************************************************
108   initialise default vfs hooks
109 ****************************************************************************/
110
111 static void vfs_init_default(connection_struct *conn)
112 {
113         DEBUG(3, ("Initialising default vfs hooks\n"));
114         vfs_init_custom(conn, DEFAULT_VFS_MODULE_NAME);
115 }
116
117 /****************************************************************************
118   initialise custom vfs hooks
119  ****************************************************************************/
120
121 bool vfs_init_custom(connection_struct *conn, const char *vfs_object)
122 {
123         char *module_path = NULL;
124         char *module_name = NULL;
125         char *module_param = NULL, *p;
126         vfs_handle_struct *handle;
127         const struct vfs_init_function_entry *entry;
128
129         if (!conn||!vfs_object||!vfs_object[0]) {
130                 DEBUG(0, ("vfs_init_custom() called with NULL pointer or "
131                           "empty vfs_object!\n"));
132                 return False;
133         }
134
135         if(!backends) {
136                 static_init_vfs(NULL);
137         }
138
139         DEBUG(3, ("Initialising custom vfs hooks from [%s]\n", vfs_object));
140
141         module_path = smb_xstrdup(vfs_object);
142
143         p = strchr_m(module_path, ':');
144
145         if (p) {
146                 *p = 0;
147                 module_param = p+1;
148                 trim_char(module_param, ' ', ' ');
149         }
150
151         trim_char(module_path, ' ', ' ');
152
153         module_name = smb_xstrdup(module_path);
154
155         if ((module_name[0] == '/') &&
156             (strcmp(module_path, DEFAULT_VFS_MODULE_NAME) != 0)) {
157
158                 /*
159                  * Extract the module name from the path. Just use the base
160                  * name of the last path component.
161                  */
162
163                 SAFE_FREE(module_name);
164                 module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
165
166                 p = strchr_m(module_name, '.');
167
168                 if (p != NULL) {
169                         *p = '\0';
170                 }
171         }
172
173         /* First, try to load the module with the new module system */
174         entry = vfs_find_backend_entry(module_name);
175         if (!entry) {
176                 NTSTATUS status;
177
178                 DEBUG(5, ("vfs module [%s] not loaded - trying to load...\n",
179                           vfs_object));
180
181                 status = smb_load_module("vfs", module_path);
182                 if (!NT_STATUS_IS_OK(status)) {
183                         DEBUG(0, ("error probing vfs module '%s': %s\n",
184                                   module_path, nt_errstr(status)));
185                         goto fail;
186                 }
187
188                 entry = vfs_find_backend_entry(module_name);
189                 if (!entry) {
190                         DEBUG(0,("Can't find a vfs module [%s]\n",vfs_object));
191                         goto fail;
192                 }
193         }
194
195         DEBUGADD(5,("Successfully loaded vfs module [%s] with the new modules system\n", vfs_object));
196
197         handle = talloc_zero(conn, vfs_handle_struct);
198         if (!handle) {
199                 DEBUG(0,("TALLOC_ZERO() failed!\n"));
200                 goto fail;
201         }
202         handle->conn = conn;
203         handle->fns = entry->fns;
204         if (module_param) {
205                 handle->param = talloc_strdup(conn, module_param);
206         }
207         DLIST_ADD(conn->vfs_handles, handle);
208
209         SAFE_FREE(module_path);
210         SAFE_FREE(module_name);
211         return True;
212
213  fail:
214         SAFE_FREE(module_path);
215         SAFE_FREE(module_name);
216         return False;
217 }
218
219 /*****************************************************************
220  Allow VFS modules to extend files_struct with VFS-specific state.
221  This will be ok for small numbers of extensions, but might need to
222  be refactored if it becomes more widely used.
223 ******************************************************************/
224
225 #define EXT_DATA_AREA(e) ((uint8_t *)(e) + sizeof(struct vfs_fsp_data))
226
227 void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
228                                    files_struct *fsp, size_t ext_size,
229                                    void (*destroy_fn)(void *p_data))
230 {
231         struct vfs_fsp_data *ext;
232         void * ext_data;
233
234         /* Prevent VFS modules adding multiple extensions. */
235         if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) {
236                 return ext_data;
237         }
238
239         ext = (struct vfs_fsp_data *)TALLOC_ZERO(
240                 handle->conn, sizeof(struct vfs_fsp_data) + ext_size);
241         if (ext == NULL) {
242                 return NULL;
243         }
244
245         ext->owner = handle;
246         ext->next = fsp->vfs_extension;
247         ext->destroy = destroy_fn;
248         fsp->vfs_extension = ext;
249         return EXT_DATA_AREA(ext);
250 }
251
252 void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
253 {
254         struct vfs_fsp_data *curr;
255         struct vfs_fsp_data *prev;
256
257         for (curr = fsp->vfs_extension, prev = NULL;
258              curr;
259              prev = curr, curr = curr->next) {
260                 if (curr->owner == handle) {
261                     if (prev) {
262                             prev->next = curr->next;
263                     } else {
264                             fsp->vfs_extension = curr->next;
265                     }
266                     if (curr->destroy) {
267                             curr->destroy(EXT_DATA_AREA(curr));
268                     }
269                     TALLOC_FREE(curr);
270                     return;
271                 }
272         }
273 }
274
275 void vfs_remove_all_fsp_extensions(files_struct *fsp)
276 {
277         struct vfs_fsp_data *curr;
278         struct vfs_fsp_data *next;
279
280         for (curr = fsp->vfs_extension; curr; curr = next) {
281
282                 next = curr->next;
283                 fsp->vfs_extension = next;
284
285                 if (curr->destroy) {
286                         curr->destroy(EXT_DATA_AREA(curr));
287                 }
288                 TALLOC_FREE(curr);
289         }
290 }
291
292 void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
293 {
294         struct vfs_fsp_data *head;
295
296         for (head = fsp->vfs_extension; head; head = head->next) {
297                 if (head->owner == handle) {
298                         return head;
299                 }
300         }
301
302         return NULL;
303 }
304
305 void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, files_struct *fsp)
306 {
307         struct vfs_fsp_data *head;
308
309         head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp);
310         if (head != NULL) {
311                 return EXT_DATA_AREA(head);
312         }
313
314         return NULL;
315 }
316
317 #undef EXT_DATA_AREA
318
319 /*
320  * Ensure this module catches all VFS functions.
321  */
322 #ifdef DEVELOPER
323 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
324                             const char *module)
325 {
326         bool missing_fn = false;
327         unsigned int idx;
328         const uintptr_t *end = (const uintptr_t *)(fns + 1);
329
330         for (idx = 0; ((const uintptr_t *)fns + idx) < end; idx++) {
331                 if (*((const uintptr_t *)fns + idx) == 0) {
332                         DBG_ERR("VFS function at index %d not implemented "
333                                 "in module %s\n", idx, module);
334                         missing_fn = true;
335                 }
336         }
337
338         if (missing_fn) {
339                 smb_panic("Required VFS function not implemented in module.\n");
340         }
341 }
342 #else
343 void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
344                             const char *module)
345 {
346 }
347 #endif
348
349 /*****************************************************************
350  Generic VFS init.
351 ******************************************************************/
352
353 bool smbd_vfs_init(connection_struct *conn)
354 {
355         const char **vfs_objects;
356         unsigned int i = 0;
357         int j = 0;
358
359         /* Normal share - initialise with disk access functions */
360         vfs_init_default(conn);
361
362         /* No need to load vfs modules for printer connections */
363         if (conn->printer) {
364                 return True;
365         }
366
367         vfs_objects = lp_vfs_objects(SNUM(conn));
368
369         /* Override VFS functions if 'vfs object' was not specified*/
370         if (!vfs_objects || !vfs_objects[0])
371                 return True;
372
373         for (i=0; vfs_objects[i] ;) {
374                 i++;
375         }
376
377         for (j=i-1; j >= 0; j--) {
378                 if (!vfs_init_custom(conn, vfs_objects[j])) {
379                         DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_objects[j]));
380                         return False;
381                 }
382         }
383         return True;
384 }
385
386 /*******************************************************************
387  Check if a file exists in the vfs.
388 ********************************************************************/
389
390 NTSTATUS vfs_file_exist(connection_struct *conn, struct smb_filename *smb_fname)
391 {
392         /* Only return OK if stat was successful and S_ISREG */
393         if ((SMB_VFS_STAT(conn, smb_fname) != -1) &&
394             S_ISREG(smb_fname->st.st_ex_mode)) {
395                 return NT_STATUS_OK;
396         }
397
398         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
399 }
400
401 /****************************************************************************
402  Read data from fsp on the vfs. (note: EINTR re-read differs from vfs_write_data)
403 ****************************************************************************/
404
405 ssize_t vfs_read_data(files_struct *fsp, char *buf, size_t byte_count)
406 {
407         size_t total=0;
408
409         while (total < byte_count)
410         {
411                 ssize_t ret = SMB_VFS_READ(fsp, buf + total,
412                                            byte_count - total);
413
414                 if (ret == 0) return total;
415                 if (ret == -1) {
416                         if (errno == EINTR)
417                                 continue;
418                         else
419                                 return -1;
420                 }
421                 total += ret;
422         }
423         return (ssize_t)total;
424 }
425
426 /****************************************************************************
427  Write data to a fd on the vfs.
428 ****************************************************************************/
429
430 ssize_t vfs_write_data(struct smb_request *req,
431                         files_struct *fsp,
432                         const char *buffer,
433                         size_t N)
434 {
435         size_t total=0;
436         ssize_t ret;
437
438         if (req && req->unread_bytes) {
439                 int sockfd = req->xconn->transport.sock;
440                 int old_flags;
441                 SMB_ASSERT(req->unread_bytes == N);
442                 /* VFS_RECVFILE must drain the socket
443                  * before returning. */
444                 req->unread_bytes = 0;
445                 /* Ensure the socket is blocking. */
446                 old_flags = fcntl(sockfd, F_GETFL, 0);
447                 if (set_blocking(sockfd, true) == -1) {
448                         return (ssize_t)-1;
449                 }
450                 ret = SMB_VFS_RECVFILE(sockfd,
451                                         fsp,
452                                         (off_t)-1,
453                                         N);
454                 if (fcntl(sockfd, F_SETFL, old_flags) == -1) {
455                         return (ssize_t)-1;
456                 }
457                 return ret;
458         }
459
460         while (total < N) {
461                 ret = SMB_VFS_WRITE(fsp, buffer + total, N - total);
462
463                 if (ret == -1)
464                         return -1;
465                 if (ret == 0)
466                         return total;
467
468                 total += ret;
469         }
470         return (ssize_t)total;
471 }
472
473 ssize_t vfs_pwrite_data(struct smb_request *req,
474                         files_struct *fsp,
475                         const char *buffer,
476                         size_t N,
477                         off_t offset)
478 {
479         size_t total=0;
480         ssize_t ret;
481
482         if (req && req->unread_bytes) {
483                 int sockfd = req->xconn->transport.sock;
484                 SMB_ASSERT(req->unread_bytes == N);
485                 /* VFS_RECVFILE must drain the socket
486                  * before returning. */
487                 req->unread_bytes = 0;
488                 /*
489                  * Leave the socket non-blocking and
490                  * use SMB_VFS_RECVFILE. If it returns
491                  * EAGAIN || EWOULDBLOCK temporarily set
492                  * the socket blocking and retry
493                  * the RECVFILE.
494                  */
495                 while (total < N) {
496                         ret = SMB_VFS_RECVFILE(sockfd,
497                                                 fsp,
498                                                 offset + total,
499                                                 N - total);
500                         if (ret == 0 || (ret == -1 &&
501                                          (errno == EAGAIN ||
502                                           errno == EWOULDBLOCK))) {
503                                 int old_flags;
504                                 /* Ensure the socket is blocking. */
505                                 old_flags = fcntl(sockfd, F_GETFL, 0);
506                                 if (set_blocking(sockfd, true) == -1) {
507                                         return (ssize_t)-1;
508                                 }
509                                 ret = SMB_VFS_RECVFILE(sockfd,
510                                                         fsp,
511                                                         offset + total,
512                                                         N - total);
513                                 if (fcntl(sockfd, F_SETFL, old_flags) == -1) {
514                                         return (ssize_t)-1;
515                                 }
516                                 if (ret == -1) {
517                                         return (ssize_t)-1;
518                                 }
519                                 total += ret;
520                                 return (ssize_t)total;
521                         }
522                         /* Any other error case. */
523                         if (ret == -1) {
524                                 return ret;
525                         }
526                         total += ret;
527                 }
528                 return (ssize_t)total;
529         }
530
531         while (total < N) {
532                 ret = SMB_VFS_PWRITE(fsp, buffer + total, N - total,
533                                      offset + total);
534
535                 if (ret == -1)
536                         return -1;
537                 if (ret == 0)
538                         return total;
539
540                 total += ret;
541         }
542         return (ssize_t)total;
543 }
544 /****************************************************************************
545  An allocate file space call using the vfs interface.
546  Allocates space for a file from a filedescriptor.
547  Returns 0 on success, -1 on failure.
548 ****************************************************************************/
549
550 int vfs_allocate_file_space(files_struct *fsp, uint64_t len)
551 {
552         int ret;
553         connection_struct *conn = fsp->conn;
554         uint64_t space_avail;
555         uint64_t bsize,dfree,dsize;
556         NTSTATUS status;
557
558         /*
559          * Actually try and commit the space on disk....
560          */
561
562         DEBUG(10,("vfs_allocate_file_space: file %s, len %.0f\n",
563                   fsp_str_dbg(fsp), (double)len));
564
565         if (((off_t)len) < 0) {
566                 DEBUG(0,("vfs_allocate_file_space: %s negative len "
567                          "requested.\n", fsp_str_dbg(fsp)));
568                 errno = EINVAL;
569                 return -1;
570         }
571
572         status = vfs_stat_fsp(fsp);
573         if (!NT_STATUS_IS_OK(status)) {
574                 return -1;
575         }
576
577         if (len == (uint64_t)fsp->fsp_name->st.st_ex_size)
578                 return 0;
579
580         if (len < (uint64_t)fsp->fsp_name->st.st_ex_size) {
581                 /* Shrink - use ftruncate. */
582
583                 DEBUG(10,("vfs_allocate_file_space: file %s, shrink. Current "
584                           "size %.0f\n", fsp_str_dbg(fsp),
585                           (double)fsp->fsp_name->st.st_ex_size));
586
587                 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
588
589                 flush_write_cache(fsp, SAMBA_SIZECHANGE_FLUSH);
590                 if ((ret = SMB_VFS_FTRUNCATE(fsp, (off_t)len)) != -1) {
591                         set_filelen_write_cache(fsp, len);
592                 }
593
594                 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_SHRINK);
595
596                 return ret;
597         }
598
599         /* Grow - we need to test if we have enough space. */
600
601         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_GROW);
602
603         if (lp_strict_allocate(SNUM(fsp->conn))) {
604                 /* See if we have a syscall that will allocate beyond
605                    end-of-file without changing EOF. */
606                 ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_FL_KEEP_SIZE,
607                                         0, len);
608         } else {
609                 ret = 0;
610         }
611
612         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_GROW);
613
614         if (ret == 0) {
615                 /* We changed the allocation size on disk, but not
616                    EOF - exactly as required. We're done ! */
617                 return 0;
618         }
619
620         if (ret == -1 && errno == ENOSPC) {
621                 return -1;
622         }
623
624         len -= fsp->fsp_name->st.st_ex_size;
625         len /= 1024; /* Len is now number of 1k blocks needed. */
626         space_avail =
627             get_dfree_info(conn, fsp->fsp_name, &bsize, &dfree, &dsize);
628         if (space_avail == (uint64_t)-1) {
629                 return -1;
630         }
631
632         DEBUG(10,("vfs_allocate_file_space: file %s, grow. Current size %.0f, "
633                   "needed blocks = %.0f, space avail = %.0f\n",
634                   fsp_str_dbg(fsp), (double)fsp->fsp_name->st.st_ex_size, (double)len,
635                   (double)space_avail));
636
637         if (len > space_avail) {
638                 errno = ENOSPC;
639                 return -1;
640         }
641
642         return 0;
643 }
644
645 /****************************************************************************
646  A vfs set_filelen call.
647  set the length of a file from a filedescriptor.
648  Returns 0 on success, -1 on failure.
649 ****************************************************************************/
650
651 int vfs_set_filelen(files_struct *fsp, off_t len)
652 {
653         int ret;
654
655         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
656
657         DEBUG(10,("vfs_set_filelen: ftruncate %s to len %.0f\n",
658                   fsp_str_dbg(fsp), (double)len));
659         flush_write_cache(fsp, SAMBA_SIZECHANGE_FLUSH);
660         if ((ret = SMB_VFS_FTRUNCATE(fsp, len)) != -1) {
661                 set_filelen_write_cache(fsp, len);
662                 notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED,
663                              FILE_NOTIFY_CHANGE_SIZE
664                              | FILE_NOTIFY_CHANGE_ATTRIBUTES,
665                              fsp->fsp_name->base_name);
666         }
667
668         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_SET_FILE_LEN);
669
670         return ret;
671 }
672
673 /****************************************************************************
674  A slow version of fallocate. Fallback code if SMB_VFS_FALLOCATE
675  fails. Needs to be outside of the default version of SMB_VFS_FALLOCATE
676  as this is also called from the default SMB_VFS_FTRUNCATE code.
677  Always extends the file size.
678  Returns 0 on success, -1 on failure.
679 ****************************************************************************/
680
681 #define SPARSE_BUF_WRITE_SIZE (32*1024)
682
683 int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len)
684 {
685         ssize_t pwrite_ret;
686         size_t total = 0;
687
688         if (!sparse_buf) {
689                 sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE);
690                 if (!sparse_buf) {
691                         errno = ENOMEM;
692                         return -1;
693                 }
694         }
695
696         while (total < len) {
697                 size_t curr_write_size = MIN(SPARSE_BUF_WRITE_SIZE, (len - total));
698
699                 pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total);
700                 if (pwrite_ret == -1) {
701                         int saved_errno = errno;
702                         DEBUG(10,("vfs_slow_fallocate: SMB_VFS_PWRITE for file "
703                                   "%s failed with error %s\n",
704                                   fsp_str_dbg(fsp), strerror(saved_errno)));
705                         errno = saved_errno;
706                         return -1;
707                 }
708                 total += pwrite_ret;
709         }
710
711         return 0;
712 }
713
714 /****************************************************************************
715  A vfs fill sparse call.
716  Writes zeros from the end of file to len, if len is greater than EOF.
717  Used only by strict_sync.
718  Returns 0 on success, -1 on failure.
719 ****************************************************************************/
720
721 int vfs_fill_sparse(files_struct *fsp, off_t len)
722 {
723         int ret;
724         NTSTATUS status;
725         off_t offset;
726         size_t num_to_write;
727
728         status = vfs_stat_fsp(fsp);
729         if (!NT_STATUS_IS_OK(status)) {
730                 return -1;
731         }
732
733         if (len <= fsp->fsp_name->st.st_ex_size) {
734                 return 0;
735         }
736
737 #ifdef S_ISFIFO
738         if (S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
739                 return 0;
740         }
741 #endif
742
743         DEBUG(10,("vfs_fill_sparse: write zeros in file %s from len %.0f to "
744                   "len %.0f (%.0f bytes)\n", fsp_str_dbg(fsp),
745                   (double)fsp->fsp_name->st.st_ex_size, (double)len,
746                   (double)(len - fsp->fsp_name->st.st_ex_size)));
747
748         contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_FILL_SPARSE);
749
750         flush_write_cache(fsp, SAMBA_SIZECHANGE_FLUSH);
751
752         offset = fsp->fsp_name->st.st_ex_size;
753         num_to_write = len - fsp->fsp_name->st.st_ex_size;
754
755         /* Only do this on non-stream file handles. */
756         if (fsp->base_fsp == NULL) {
757                 /* for allocation try fallocate first. This can fail on some
758                  * platforms e.g. when the filesystem doesn't support it and no
759                  * emulation is being done by the libc (like on AIX with JFS1). In that
760                  * case we do our own emulation. fallocate implementations can
761                  * return ENOTSUP or EINVAL in cases like that. */
762                 ret = SMB_VFS_FALLOCATE(fsp, 0, offset, num_to_write);
763                 if (ret == -1 && errno == ENOSPC) {
764                         goto out;
765                 }
766                 if (ret == 0) {
767                         goto out;
768                 }
769                 DEBUG(10,("vfs_fill_sparse: SMB_VFS_FALLOCATE failed with "
770                         "error %d. Falling back to slow manual allocation\n", ret));
771         }
772
773         ret = vfs_slow_fallocate(fsp, offset, num_to_write);
774
775  out:
776
777         if (ret == 0) {
778                 set_filelen_write_cache(fsp, len);
779         }
780
781         contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_FILL_SPARSE);
782         return ret;
783 }
784
785 /****************************************************************************
786  Transfer some data (n bytes) between two file_struct's.
787 ****************************************************************************/
788
789 static ssize_t vfs_pread_fn(void *file, void *buf, size_t len, off_t offset)
790 {
791         struct files_struct *fsp = (struct files_struct *)file;
792
793         return SMB_VFS_PREAD(fsp, buf, len, offset);
794 }
795
796 static ssize_t vfs_pwrite_fn(void *file, const void *buf, size_t len, off_t offset)
797 {
798         struct files_struct *fsp = (struct files_struct *)file;
799
800         return SMB_VFS_PWRITE(fsp, buf, len, offset);
801 }
802
803 off_t vfs_transfer_file(files_struct *in, files_struct *out, off_t n)
804 {
805         return transfer_file_internal((void *)in, (void *)out, n,
806                                       vfs_pread_fn, vfs_pwrite_fn);
807 }
808
809 /*******************************************************************
810  A vfs_readdir wrapper which just returns the file name.
811 ********************************************************************/
812
813 const char *vfs_readdirname(connection_struct *conn, void *p,
814                             SMB_STRUCT_STAT *sbuf, char **talloced)
815 {
816         struct dirent *ptr= NULL;
817         const char *dname;
818         char *translated;
819         NTSTATUS status;
820
821         if (!p)
822                 return(NULL);
823
824         ptr = SMB_VFS_READDIR(conn, (DIR *)p, sbuf);
825         if (!ptr)
826                 return(NULL);
827
828         dname = ptr->d_name;
829
830
831 #ifdef NEXT2
832         if (telldir(p) < 0)
833                 return(NULL);
834 #endif
835
836 #ifdef HAVE_BROKEN_READDIR_NAME
837         /* using /usr/ucb/cc is BAD */
838         dname = dname - 2;
839 #endif
840
841         status = SMB_VFS_TRANSLATE_NAME(conn, dname, vfs_translate_to_windows,
842                                         talloc_tos(), &translated);
843         if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) {
844                 *talloced = NULL;
845                 return dname;
846         }
847         *talloced = translated;
848         if (!NT_STATUS_IS_OK(status)) {
849                 return NULL;
850         }
851         return translated;
852 }
853
854 /*******************************************************************
855  A wrapper for vfs_chdir().
856 ********************************************************************/
857
858 int vfs_ChDir(connection_struct *conn, const char *path)
859 {
860         int ret;
861
862         if (!LastDir) {
863                 LastDir = SMB_STRDUP("");
864         }
865
866         if (ISDOT(path)) {
867                 return 0;
868         }
869
870         if (*path == '/' && strcsequal(LastDir,path)) {
871                 return 0;
872         }
873
874         DEBUG(4,("vfs_ChDir to %s\n",path));
875
876         ret = SMB_VFS_CHDIR(conn,path);
877         if (ret == 0) {
878                 /* Global cache. */
879                 SAFE_FREE(LastDir);
880                 LastDir = SMB_STRDUP(path);
881
882                 /* conn cache. */
883                 TALLOC_FREE(conn->cwd);
884                 conn->cwd = vfs_GetWd(conn, conn);
885                 DEBUG(4,("vfs_ChDir got %s\n",conn->cwd));
886         }
887         return ret;
888 }
889
890 /*******************************************************************
891  Return the absolute current directory path - given a UNIX pathname.
892  Note that this path is returned in DOS format, not UNIX
893  format. Note this can be called with conn == NULL.
894 ********************************************************************/
895
896 char *vfs_GetWd(TALLOC_CTX *ctx, connection_struct *conn)
897 {
898         char *current_dir = NULL;
899         char *result = NULL;
900         DATA_BLOB cache_value;
901         struct file_id key;
902         struct smb_filename *smb_fname_dot = NULL;
903         struct smb_filename *smb_fname_full = NULL;
904
905         if (!lp_getwd_cache()) {
906                 goto nocache;
907         }
908
909         smb_fname_dot = synthetic_smb_fname(ctx, ".", NULL, NULL, 0);
910         if (smb_fname_dot == NULL) {
911                 errno = ENOMEM;
912                 goto out;
913         }
914
915         if (SMB_VFS_STAT(conn, smb_fname_dot) == -1) {
916                 /*
917                  * Known to fail for root: the directory may be NFS-mounted
918                  * and exported with root_squash (so has no root access).
919                  */
920                 DEBUG(1,("vfs_GetWd: couldn't stat \".\" error %s "
921                          "(NFS problem ?)\n", strerror(errno) ));
922                 goto nocache;
923         }
924
925         key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
926
927         if (!memcache_lookup(smbd_memcache(), GETWD_CACHE,
928                              data_blob_const(&key, sizeof(key)),
929                              &cache_value)) {
930                 goto nocache;
931         }
932
933         SMB_ASSERT((cache_value.length > 0)
934                    && (cache_value.data[cache_value.length-1] == '\0'));
935
936         smb_fname_full = synthetic_smb_fname(ctx, (char *)cache_value.data,
937                                              NULL, NULL, 0);
938         if (smb_fname_full == NULL) {
939                 errno = ENOMEM;
940                 goto out;
941         }
942
943         if ((SMB_VFS_STAT(conn, smb_fname_full) == 0) &&
944             (smb_fname_dot->st.st_ex_dev == smb_fname_full->st.st_ex_dev) &&
945             (smb_fname_dot->st.st_ex_ino == smb_fname_full->st.st_ex_ino) &&
946             (S_ISDIR(smb_fname_dot->st.st_ex_mode))) {
947                 /*
948                  * Ok, we're done
949                  */
950                 result = talloc_strdup(ctx, smb_fname_full->base_name);
951                 if (result == NULL) {
952                         errno = ENOMEM;
953                 }
954                 goto out;
955         }
956
957  nocache:
958
959         /*
960          * We don't have the information to hand so rely on traditional
961          * methods. The very slow getcwd, which spawns a process on some
962          * systems, or the not quite so bad getwd.
963          */
964
965         current_dir = SMB_VFS_GETWD(conn);
966         if (current_dir == NULL) {
967                 DEBUG(0, ("vfs_GetWd: SMB_VFS_GETWD call failed: %s\n",
968                           strerror(errno)));
969                 goto out;
970         }
971
972         if (lp_getwd_cache() && VALID_STAT(smb_fname_dot->st)) {
973                 key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st);
974
975                 memcache_add(smbd_memcache(), GETWD_CACHE,
976                              data_blob_const(&key, sizeof(key)),
977                              data_blob_const(current_dir,
978                                                 strlen(current_dir)+1));
979         }
980
981         result = talloc_strdup(ctx, current_dir);
982         if (result == NULL) {
983                 errno = ENOMEM;
984         }
985
986  out:
987         TALLOC_FREE(smb_fname_dot);
988         TALLOC_FREE(smb_fname_full);
989         SAFE_FREE(current_dir);
990         return result;
991 }
992
993 /*******************************************************************
994  Reduce a file name, removing .. elements and checking that
995  it is below dir in the heirachy. This uses realpath.
996  This function must run as root, and will return names
997  and valid stat structs that can be checked on open.
998 ********************************************************************/
999
1000 NTSTATUS check_reduced_name_with_privilege(connection_struct *conn,
1001                         const char *fname,
1002                         struct smb_request *smbreq)
1003 {
1004         NTSTATUS status;
1005         TALLOC_CTX *ctx = talloc_tos();
1006         const char *conn_rootdir;
1007         size_t rootdir_len;
1008         char *dir_name = NULL;
1009         const char *last_component = NULL;
1010         char *resolved_name = NULL;
1011         char *saved_dir = NULL;
1012         struct smb_filename *smb_fname_cwd = NULL;
1013         struct privilege_paths *priv_paths = NULL;
1014         int ret;
1015
1016         DEBUG(3,("check_reduced_name_with_privilege [%s] [%s]\n",
1017                         fname,
1018                         conn->connectpath));
1019
1020
1021         priv_paths = talloc_zero(smbreq, struct privilege_paths);
1022         if (!priv_paths) {
1023                 status = NT_STATUS_NO_MEMORY;
1024                 goto err;
1025         }
1026
1027         if (!parent_dirname(ctx, fname, &dir_name, &last_component)) {
1028                 status = NT_STATUS_NO_MEMORY;
1029                 goto err;
1030         }
1031
1032         priv_paths->parent_name.base_name = talloc_strdup(priv_paths, dir_name);
1033         priv_paths->file_name.base_name = talloc_strdup(priv_paths, last_component);
1034
1035         if (priv_paths->parent_name.base_name == NULL ||
1036                         priv_paths->file_name.base_name == NULL) {
1037                 status = NT_STATUS_NO_MEMORY;
1038                 goto err;
1039         }
1040
1041         if (SMB_VFS_STAT(conn, &priv_paths->parent_name) != 0) {
1042                 status = map_nt_error_from_unix(errno);
1043                 goto err;
1044         }
1045         /* Remember where we were. */
1046         saved_dir = vfs_GetWd(ctx, conn);
1047         if (!saved_dir) {
1048                 status = map_nt_error_from_unix(errno);
1049                 goto err;
1050         }
1051
1052         /* Go to the parent directory to lock in memory. */
1053         if (vfs_ChDir(conn, priv_paths->parent_name.base_name) == -1) {
1054                 status = map_nt_error_from_unix(errno);
1055                 goto err;
1056         }
1057
1058         /* Get the absolute path of the parent directory. */
1059         resolved_name = SMB_VFS_REALPATH(conn,".");
1060         if (!resolved_name) {
1061                 status = map_nt_error_from_unix(errno);
1062                 goto err;
1063         }
1064
1065         if (*resolved_name != '/') {
1066                 DEBUG(0,("check_reduced_name_with_privilege: realpath "
1067                         "doesn't return absolute paths !\n"));
1068                 status = NT_STATUS_OBJECT_NAME_INVALID;
1069                 goto err;
1070         }
1071
1072         DEBUG(10,("check_reduced_name_with_privilege: realpath [%s] -> [%s]\n",
1073                 priv_paths->parent_name.base_name,
1074                 resolved_name));
1075
1076         /* Now check the stat value is the same. */
1077         smb_fname_cwd = synthetic_smb_fname(talloc_tos(), ".", NULL, NULL, 0);
1078         if (smb_fname_cwd == NULL) {
1079                 status = NT_STATUS_NO_MEMORY;
1080                 goto err;
1081         }
1082
1083         if (SMB_VFS_LSTAT(conn, smb_fname_cwd) != 0) {
1084                 status = map_nt_error_from_unix(errno);
1085                 goto err;
1086         }
1087
1088         /* Ensure we're pointing at the same place. */
1089         if (!check_same_stat(&smb_fname_cwd->st, &priv_paths->parent_name.st)) {
1090                 DEBUG(0,("check_reduced_name_with_privilege: "
1091                         "device/inode/uid/gid on directory %s changed. "
1092                         "Denying access !\n",
1093                         priv_paths->parent_name.base_name));
1094                 status = NT_STATUS_ACCESS_DENIED;
1095                 goto err;
1096         }
1097
1098         /* Ensure we're below the connect path. */
1099
1100         conn_rootdir = SMB_VFS_CONNECTPATH(conn, fname);
1101         if (conn_rootdir == NULL) {
1102                 DEBUG(2, ("check_reduced_name_with_privilege: Could not get "
1103                         "conn_rootdir\n"));
1104                 status = NT_STATUS_ACCESS_DENIED;
1105                 goto err;
1106         }
1107
1108         rootdir_len = strlen(conn_rootdir);
1109
1110         /*
1111          * In the case of rootdir_len == 1, we know that conn_rootdir is
1112          * "/", and we also know that resolved_name starts with a slash.
1113          * So, in this corner case, resolved_name is automatically a
1114          * sub-directory of the conn_rootdir. Thus we can skip the string
1115          * comparison and the next character checks (which are even
1116          * wrong in this case).
1117          */
1118         if (rootdir_len != 1) {
1119                 bool matched;
1120
1121                 matched = (strncmp(conn_rootdir, resolved_name,
1122                                 rootdir_len) == 0);
1123
1124                 if (!matched || (resolved_name[rootdir_len] != '/' &&
1125                                  resolved_name[rootdir_len] != '\0')) {
1126                         DEBUG(2, ("check_reduced_name_with_privilege: Bad "
1127                                 "access attempt: %s is a symlink outside the "
1128                                 "share path\n",
1129                                 dir_name));
1130                         DEBUGADD(2, ("conn_rootdir =%s\n", conn_rootdir));
1131                         DEBUGADD(2, ("resolved_name=%s\n", resolved_name));
1132                         status = NT_STATUS_ACCESS_DENIED;
1133                         goto err;
1134                 }
1135         }
1136
1137         /* Now ensure that the last component either doesn't
1138            exist, or is *NOT* a symlink. */
1139
1140         ret = SMB_VFS_LSTAT(conn, &priv_paths->file_name);
1141         if (ret == -1) {
1142                 /* Errno must be ENOENT for this be ok. */
1143                 if (errno != ENOENT) {
1144                         status = map_nt_error_from_unix(errno);
1145                         DEBUG(2, ("check_reduced_name_with_privilege: "
1146                                 "LSTAT on %s failed with %s\n",
1147                                 priv_paths->file_name.base_name,
1148                                 nt_errstr(status)));
1149                         goto err;
1150                 }
1151         }
1152
1153         if (VALID_STAT(priv_paths->file_name.st) &&
1154                         S_ISLNK(priv_paths->file_name.st.st_ex_mode)) {
1155                 DEBUG(2, ("check_reduced_name_with_privilege: "
1156                         "Last component %s is a symlink. Denying"
1157                         "access.\n",
1158                         priv_paths->file_name.base_name));
1159                 status = NT_STATUS_ACCESS_DENIED;
1160                 goto err;
1161         }
1162
1163         smbreq->priv_paths = priv_paths;
1164         status = NT_STATUS_OK;
1165
1166   err:
1167
1168         if (saved_dir) {
1169                 vfs_ChDir(conn, saved_dir);
1170         }
1171         SAFE_FREE(resolved_name);
1172         if (!NT_STATUS_IS_OK(status)) {
1173                 TALLOC_FREE(priv_paths);
1174         }
1175         TALLOC_FREE(dir_name);
1176         return status;
1177 }
1178
1179 /*******************************************************************
1180  Reduce a file name, removing .. elements and checking that
1181  it is below dir in the heirachy. This uses realpath.
1182
1183  If cwd_name == NULL then fname is a client given path relative
1184  to the root path of the share.
1185
1186  If cwd_name != NULL then fname is a client given path relative
1187  to cwd_name. cwd_name is relative to the root path of the share.
1188 ********************************************************************/
1189
1190 NTSTATUS check_reduced_name(connection_struct *conn,
1191                                 const char *cwd_name,
1192                                 const char *fname)
1193 {
1194         char *resolved_name = NULL;
1195         char *new_fname = NULL;
1196         bool allow_symlinks = true;
1197         bool allow_widelinks = false;
1198
1199         DBG_DEBUG("check_reduced_name [%s] [%s]\n", fname, conn->connectpath);
1200
1201         resolved_name = SMB_VFS_REALPATH(conn,fname);
1202
1203         if (!resolved_name) {
1204                 switch (errno) {
1205                         case ENOTDIR:
1206                                 DEBUG(3,("check_reduced_name: Component not a "
1207                                          "directory in getting realpath for "
1208                                          "%s\n", fname));
1209                                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
1210                         case ENOENT:
1211                         {
1212                                 TALLOC_CTX *ctx = talloc_tos();
1213                                 char *dir_name = NULL;
1214                                 const char *last_component = NULL;
1215                                 char *new_name = NULL;
1216                                 int ret;
1217
1218                                 /* Last component didn't exist.
1219                                    Remove it and try and canonicalise
1220                                    the directory name. */
1221                                 if (!parent_dirname(ctx, fname,
1222                                                 &dir_name,
1223                                                 &last_component)) {
1224                                         return NT_STATUS_NO_MEMORY;
1225                                 }
1226
1227                                 resolved_name = SMB_VFS_REALPATH(conn,dir_name);
1228                                 if (!resolved_name) {
1229                                         NTSTATUS status = map_nt_error_from_unix(errno);
1230
1231                                         if (errno == ENOENT || errno == ENOTDIR) {
1232                                                 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
1233                                         }
1234
1235                                         DEBUG(3,("check_reduce_name: "
1236                                                  "couldn't get realpath for "
1237                                                  "%s (%s)\n",
1238                                                 fname,
1239                                                 nt_errstr(status)));
1240                                         return status;
1241                                 }
1242                                 ret = asprintf(&new_name, "%s/%s",
1243                                                resolved_name, last_component);
1244                                 SAFE_FREE(resolved_name);
1245                                 if (ret == -1) {
1246                                         return NT_STATUS_NO_MEMORY;
1247                                 }
1248                                 resolved_name = new_name;
1249                                 break;
1250                         }
1251                         default:
1252                                 DEBUG(3,("check_reduced_name: couldn't get "
1253                                          "realpath for %s\n", fname));
1254                                 return map_nt_error_from_unix(errno);
1255                 }
1256         }
1257
1258         DEBUG(10,("check_reduced_name realpath [%s] -> [%s]\n", fname,
1259                   resolved_name));
1260
1261         if (*resolved_name != '/') {
1262                 DEBUG(0,("check_reduced_name: realpath doesn't return "
1263                          "absolute paths !\n"));
1264                 SAFE_FREE(resolved_name);
1265                 return NT_STATUS_OBJECT_NAME_INVALID;
1266         }
1267
1268         allow_widelinks = lp_widelinks(SNUM(conn));
1269         allow_symlinks = lp_follow_symlinks(SNUM(conn));
1270
1271         /* Common widelinks and symlinks checks. */
1272         if (!allow_widelinks || !allow_symlinks) {
1273                 const char *conn_rootdir;
1274                 size_t rootdir_len;
1275
1276                 conn_rootdir = SMB_VFS_CONNECTPATH(conn, fname);
1277                 if (conn_rootdir == NULL) {
1278                         DEBUG(2, ("check_reduced_name: Could not get "
1279                                 "conn_rootdir\n"));
1280                         SAFE_FREE(resolved_name);
1281                         return NT_STATUS_ACCESS_DENIED;
1282                 }
1283
1284                 rootdir_len = strlen(conn_rootdir);
1285
1286                 /*
1287                  * In the case of rootdir_len == 1, we know that
1288                  * conn_rootdir is "/", and we also know that
1289                  * resolved_name starts with a slash.  So, in this
1290                  * corner case, resolved_name is automatically a
1291                  * sub-directory of the conn_rootdir. Thus we can skip
1292                  * the string comparison and the next character checks
1293                  * (which are even wrong in this case).
1294                  */
1295                 if (rootdir_len != 1) {
1296                         bool matched;
1297
1298                         matched = (strncmp(conn_rootdir, resolved_name,
1299                                         rootdir_len) == 0);
1300                         if (!matched || (resolved_name[rootdir_len] != '/' &&
1301                                          resolved_name[rootdir_len] != '\0')) {
1302                                 DEBUG(2, ("check_reduced_name: Bad access "
1303                                         "attempt: %s is a symlink outside the "
1304                                         "share path\n", fname));
1305                                 DEBUGADD(2, ("conn_rootdir =%s\n",
1306                                              conn_rootdir));
1307                                 DEBUGADD(2, ("resolved_name=%s\n",
1308                                              resolved_name));
1309                                 SAFE_FREE(resolved_name);
1310                                 return NT_STATUS_ACCESS_DENIED;
1311                         }
1312                 }
1313
1314                 /* Extra checks if all symlinks are disallowed. */
1315                 if (!allow_symlinks) {
1316                         /* fname can't have changed in resolved_path. */
1317                         const char *p = &resolved_name[rootdir_len];
1318
1319                         /*
1320                          * UNIX filesystem semantics, names consisting
1321                          * only of "." or ".." CANNOT be symlinks.
1322                          */
1323                         if (ISDOT(fname) || ISDOTDOT(fname)) {
1324                                 goto out;
1325                         }
1326
1327                         if (*p != '/') {
1328                                 DEBUG(2, ("check_reduced_name: logic error (%c) "
1329                                         "in resolved_name: %s\n",
1330                                         *p,
1331                                         fname));
1332                                 SAFE_FREE(resolved_name);
1333                                 return NT_STATUS_ACCESS_DENIED;
1334                         }
1335
1336                         p++;
1337
1338                         /*
1339                          * If cwd_name is present and not ".",
1340                          * then fname is relative to that, not
1341                          * the root of the share. Make sure the
1342                          * path we check is the one the client
1343                          * sent (cwd_name+fname).
1344                          */
1345                         if (cwd_name != NULL && !ISDOT(cwd_name)) {
1346                                 new_fname = talloc_asprintf(talloc_tos(),
1347                                                         "%s/%s",
1348                                                         cwd_name,
1349                                                         fname);
1350                                 if (new_fname == NULL) {
1351                                         SAFE_FREE(resolved_name);
1352                                         return NT_STATUS_NO_MEMORY;
1353                                 }
1354                                 fname = new_fname;
1355                         }
1356
1357                         if (strcmp(fname, p)!=0) {
1358                                 DEBUG(2, ("check_reduced_name: Bad access "
1359                                         "attempt: %s is a symlink to %s\n",
1360                                           fname, p));
1361                                 SAFE_FREE(resolved_name);
1362                                 TALLOC_FREE(new_fname);
1363                                 return NT_STATUS_ACCESS_DENIED;
1364                         }
1365                 }
1366         }
1367
1368   out:
1369
1370         DBG_INFO("%s reduced to %s\n", fname, resolved_name);
1371         SAFE_FREE(resolved_name);
1372         TALLOC_FREE(new_fname);
1373         return NT_STATUS_OK;
1374 }
1375
1376 /**
1377  * XXX: This is temporary and there should be no callers of this once
1378  * smb_filename is plumbed through all path based operations.
1379  *
1380  * Called when we know stream name parsing has already been done.
1381  */
1382 int vfs_stat_smb_basename(struct connection_struct *conn,
1383                         const struct smb_filename *smb_fname_in,
1384                         SMB_STRUCT_STAT *psbuf)
1385 {
1386         struct smb_filename smb_fname = {
1387                 .base_name = discard_const_p(char, smb_fname_in->base_name),
1388                 .flags = smb_fname_in->flags
1389         };
1390         int ret;
1391
1392         if (smb_fname.flags & SMB_FILENAME_POSIX_PATH) {
1393                 ret = SMB_VFS_LSTAT(conn, &smb_fname);
1394         } else {
1395                 ret = SMB_VFS_STAT(conn, &smb_fname);
1396         }
1397
1398         if (ret != -1) {
1399                 *psbuf = smb_fname.st;
1400         }
1401         return ret;
1402 }
1403
1404 /**
1405  * Ensure LSTAT is called for POSIX paths.
1406  */
1407
1408 NTSTATUS vfs_stat_fsp(files_struct *fsp)
1409 {
1410         int ret;
1411
1412         if(fsp->fh->fd == -1) {
1413                 if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
1414                         ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
1415                 } else {
1416                         ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
1417                 }
1418                 if (ret == -1) {
1419                         return map_nt_error_from_unix(errno);
1420                 }
1421         } else {
1422                 if(SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
1423                         return map_nt_error_from_unix(errno);
1424                 }
1425         }
1426         return NT_STATUS_OK;
1427 }
1428
1429 /**
1430  * Initialize num_streams and streams, then call VFS op streaminfo
1431  */
1432 NTSTATUS vfs_streaminfo(connection_struct *conn,
1433                         struct files_struct *fsp,
1434                         const struct smb_filename *smb_fname,
1435                         TALLOC_CTX *mem_ctx,
1436                         unsigned int *num_streams,
1437                         struct stream_struct **streams)
1438 {
1439         *num_streams = 0;
1440         *streams = NULL;
1441         return SMB_VFS_STREAMINFO(conn,
1442                         fsp,
1443                         smb_fname,
1444                         mem_ctx,
1445                         num_streams,
1446                         streams);
1447 }
1448
1449 /*
1450   generate a file_id from a stat structure
1451  */
1452 struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf)
1453 {
1454         return SMB_VFS_FILE_ID_CREATE(conn, sbuf);
1455 }
1456
1457 int smb_vfs_call_connect(struct vfs_handle_struct *handle,
1458                          const char *service, const char *user)
1459 {
1460         VFS_FIND(connect);
1461         return handle->fns->connect_fn(handle, service, user);
1462 }
1463
1464 void smb_vfs_call_disconnect(struct vfs_handle_struct *handle)
1465 {
1466         VFS_FIND(disconnect);
1467         handle->fns->disconnect_fn(handle);
1468 }
1469
1470 uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
1471                                 const struct smb_filename *smb_fname,
1472                                 uint64_t *bsize,
1473                                 uint64_t *dfree,
1474                                 uint64_t *dsize)
1475 {
1476         VFS_FIND(disk_free);
1477         return handle->fns->disk_free_fn(handle, smb_fname,
1478                         bsize, dfree, dsize);
1479 }
1480
1481 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle,
1482                                 const struct smb_filename *smb_fname,
1483                                 enum SMB_QUOTA_TYPE qtype,
1484                                 unid_t id,
1485                                 SMB_DISK_QUOTA *qt)
1486 {
1487         VFS_FIND(get_quota);
1488         return handle->fns->get_quota_fn(handle, smb_fname, qtype, id, qt);
1489 }
1490
1491 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1492                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1493                            SMB_DISK_QUOTA *qt)
1494 {
1495         VFS_FIND(set_quota);
1496         return handle->fns->set_quota_fn(handle, qtype, id, qt);
1497 }
1498
1499 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1500                                       struct files_struct *fsp,
1501                                       struct shadow_copy_data *shadow_copy_data,
1502                                       bool labels)
1503 {
1504         VFS_FIND(get_shadow_copy_data);
1505         return handle->fns->get_shadow_copy_data_fn(handle, fsp, 
1506                                                     shadow_copy_data,
1507                                                     labels);
1508 }
1509 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, const char *path,
1510                          struct vfs_statvfs_struct *statbuf)
1511 {
1512         VFS_FIND(statvfs);
1513         return handle->fns->statvfs_fn(handle, path, statbuf);
1514 }
1515
1516 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1517                         enum timestamp_set_resolution *p_ts_res)
1518 {
1519         VFS_FIND(fs_capabilities);
1520         return handle->fns->fs_capabilities_fn(handle, p_ts_res);
1521 }
1522
1523 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1524                                         struct dfs_GetDFSReferral *r)
1525 {
1526         VFS_FIND(get_dfs_referrals);
1527         return handle->fns->get_dfs_referrals_fn(handle, r);
1528 }
1529
1530 DIR *smb_vfs_call_opendir(struct vfs_handle_struct *handle,
1531                                         const struct smb_filename *smb_fname,
1532                                         const char *mask,
1533                                         uint32_t attributes)
1534 {
1535         VFS_FIND(opendir);
1536         return handle->fns->opendir_fn(handle, smb_fname, mask, attributes);
1537 }
1538
1539 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1540                                         struct files_struct *fsp,
1541                                         const char *mask,
1542                                         uint32_t attributes)
1543 {
1544         VFS_FIND(fdopendir);
1545         return handle->fns->fdopendir_fn(handle, fsp, mask, attributes);
1546 }
1547
1548 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1549                                               DIR *dirp,
1550                                               SMB_STRUCT_STAT *sbuf)
1551 {
1552         VFS_FIND(readdir);
1553         return handle->fns->readdir_fn(handle, dirp, sbuf);
1554 }
1555
1556 void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
1557                           DIR *dirp, long offset)
1558 {
1559         VFS_FIND(seekdir);
1560         handle->fns->seekdir_fn(handle, dirp, offset);
1561 }
1562
1563 long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
1564                           DIR *dirp)
1565 {
1566         VFS_FIND(telldir);
1567         return handle->fns->telldir_fn(handle, dirp);
1568 }
1569
1570 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1571                              DIR *dirp)
1572 {
1573         VFS_FIND(rewind_dir);
1574         handle->fns->rewind_dir_fn(handle, dirp);
1575 }
1576
1577 int smb_vfs_call_mkdir(struct vfs_handle_struct *handle,
1578                         const struct smb_filename *smb_fname,
1579                         mode_t mode)
1580 {
1581         VFS_FIND(mkdir);
1582         return handle->fns->mkdir_fn(handle, smb_fname, mode);
1583 }
1584
1585 int smb_vfs_call_rmdir(struct vfs_handle_struct *handle,
1586                         const struct smb_filename *smb_fname)
1587 {
1588         VFS_FIND(rmdir);
1589         return handle->fns->rmdir_fn(handle, smb_fname);
1590 }
1591
1592 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1593                           DIR *dir)
1594 {
1595         VFS_FIND(closedir);
1596         return handle->fns->closedir_fn(handle, dir);
1597 }
1598
1599 void smb_vfs_call_init_search_op(struct vfs_handle_struct *handle,
1600                                  DIR *dirp)
1601 {
1602         VFS_FIND(init_search_op);
1603         handle->fns->init_search_op_fn(handle, dirp);
1604 }
1605
1606 int smb_vfs_call_open(struct vfs_handle_struct *handle,
1607                       struct smb_filename *smb_fname, struct files_struct *fsp,
1608                       int flags, mode_t mode)
1609 {
1610         VFS_FIND(open);
1611         return handle->fns->open_fn(handle, smb_fname, fsp, flags, mode);
1612 }
1613
1614 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1615                                   struct smb_request *req,
1616                                   uint16_t root_dir_fid,
1617                                   struct smb_filename *smb_fname,
1618                                   uint32_t access_mask,
1619                                   uint32_t share_access,
1620                                   uint32_t create_disposition,
1621                                   uint32_t create_options,
1622                                   uint32_t file_attributes,
1623                                   uint32_t oplock_request,
1624                                   struct smb2_lease *lease,
1625                                   uint64_t allocation_size,
1626                                   uint32_t private_flags,
1627                                   struct security_descriptor *sd,
1628                                   struct ea_list *ea_list,
1629                                   files_struct **result,
1630                                   int *pinfo,
1631                                   const struct smb2_create_blobs *in_context_blobs,
1632                                   struct smb2_create_blobs *out_context_blobs)
1633 {
1634         VFS_FIND(create_file);
1635         return handle->fns->create_file_fn(
1636                 handle, req, root_dir_fid, smb_fname, access_mask,
1637                 share_access, create_disposition, create_options,
1638                 file_attributes, oplock_request, lease, allocation_size,
1639                 private_flags, sd, ea_list,
1640                 result, pinfo, in_context_blobs, out_context_blobs);
1641 }
1642
1643 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1644                        struct files_struct *fsp)
1645 {
1646         VFS_FIND(close);
1647         return handle->fns->close_fn(handle, fsp);
1648 }
1649
1650 ssize_t smb_vfs_call_read(struct vfs_handle_struct *handle,
1651                           struct files_struct *fsp, void *data, size_t n)
1652 {
1653         VFS_FIND(read);
1654         return handle->fns->read_fn(handle, fsp, data, n);
1655 }
1656
1657 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1658                            struct files_struct *fsp, void *data, size_t n,
1659                            off_t offset)
1660 {
1661         VFS_FIND(pread);
1662         return handle->fns->pread_fn(handle, fsp, data, n, offset);
1663 }
1664
1665 struct smb_vfs_call_pread_state {
1666         ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1667         ssize_t retval;
1668         struct vfs_aio_state vfs_aio_state;
1669 };
1670
1671 static void smb_vfs_call_pread_done(struct tevent_req *subreq);
1672
1673 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1674                                            TALLOC_CTX *mem_ctx,
1675                                            struct tevent_context *ev,
1676                                            struct files_struct *fsp,
1677                                            void *data,
1678                                            size_t n, off_t offset)
1679 {
1680         struct tevent_req *req, *subreq;
1681         struct smb_vfs_call_pread_state *state;
1682
1683         req = tevent_req_create(mem_ctx, &state,
1684                                 struct smb_vfs_call_pread_state);
1685         if (req == NULL) {
1686                 return NULL;
1687         }
1688         VFS_FIND(pread_send);
1689         state->recv_fn = handle->fns->pread_recv_fn;
1690
1691         subreq = handle->fns->pread_send_fn(handle, state, ev, fsp, data, n,
1692                                             offset);
1693         if (tevent_req_nomem(subreq, req)) {
1694                 return tevent_req_post(req, ev);
1695         }
1696         tevent_req_set_callback(subreq, smb_vfs_call_pread_done, req);
1697         return req;
1698 }
1699
1700 static void smb_vfs_call_pread_done(struct tevent_req *subreq)
1701 {
1702         struct tevent_req *req = tevent_req_callback_data(
1703                 subreq, struct tevent_req);
1704         struct smb_vfs_call_pread_state *state = tevent_req_data(
1705                 req, struct smb_vfs_call_pread_state);
1706
1707         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1708         TALLOC_FREE(subreq);
1709         if (state->retval == -1) {
1710                 tevent_req_error(req, state->vfs_aio_state.error);
1711                 return;
1712         }
1713         tevent_req_done(req);
1714 }
1715
1716 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req,
1717                            struct vfs_aio_state *vfs_aio_state)
1718 {
1719         struct smb_vfs_call_pread_state *state = tevent_req_data(
1720                 req, struct smb_vfs_call_pread_state);
1721
1722         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1723                 return -1;
1724         }
1725         *vfs_aio_state = state->vfs_aio_state;
1726         return state->retval;
1727 }
1728
1729 ssize_t smb_vfs_call_write(struct vfs_handle_struct *handle,
1730                            struct files_struct *fsp, const void *data,
1731                            size_t n)
1732 {
1733         VFS_FIND(write);
1734         return handle->fns->write_fn(handle, fsp, data, n);
1735 }
1736
1737 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1738                             struct files_struct *fsp, const void *data,
1739                             size_t n, off_t offset)
1740 {
1741         VFS_FIND(pwrite);
1742         return handle->fns->pwrite_fn(handle, fsp, data, n, offset);
1743 }
1744
1745 struct smb_vfs_call_pwrite_state {
1746         ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1747         ssize_t retval;
1748         struct vfs_aio_state vfs_aio_state;
1749 };
1750
1751 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq);
1752
1753 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1754                                             TALLOC_CTX *mem_ctx,
1755                                             struct tevent_context *ev,
1756                                             struct files_struct *fsp,
1757                                             const void *data,
1758                                             size_t n, off_t offset)
1759 {
1760         struct tevent_req *req, *subreq;
1761         struct smb_vfs_call_pwrite_state *state;
1762
1763         req = tevent_req_create(mem_ctx, &state,
1764                                 struct smb_vfs_call_pwrite_state);
1765         if (req == NULL) {
1766                 return NULL;
1767         }
1768         VFS_FIND(pwrite_send);
1769         state->recv_fn = handle->fns->pwrite_recv_fn;
1770
1771         subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n,
1772                                              offset);
1773         if (tevent_req_nomem(subreq, req)) {
1774                 return tevent_req_post(req, ev);
1775         }
1776         tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req);
1777         return req;
1778 }
1779
1780 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq)
1781 {
1782         struct tevent_req *req = tevent_req_callback_data(
1783                 subreq, struct tevent_req);
1784         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1785                 req, struct smb_vfs_call_pwrite_state);
1786
1787         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1788         TALLOC_FREE(subreq);
1789         if (state->retval == -1) {
1790                 tevent_req_error(req, state->vfs_aio_state.error);
1791                 return;
1792         }
1793         tevent_req_done(req);
1794 }
1795
1796 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req,
1797                             struct vfs_aio_state *vfs_aio_state)
1798 {
1799         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1800                 req, struct smb_vfs_call_pwrite_state);
1801
1802         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1803                 return -1;
1804         }
1805         *vfs_aio_state = state->vfs_aio_state;
1806         return state->retval;
1807 }
1808
1809 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1810                              struct files_struct *fsp, off_t offset,
1811                              int whence)
1812 {
1813         VFS_FIND(lseek);
1814         return handle->fns->lseek_fn(handle, fsp, offset, whence);
1815 }
1816
1817 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1818                               files_struct *fromfsp, const DATA_BLOB *header,
1819                               off_t offset, size_t count)
1820 {
1821         VFS_FIND(sendfile);
1822         return handle->fns->sendfile_fn(handle, tofd, fromfsp, header, offset,
1823                                         count);
1824 }
1825
1826 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1827                               files_struct *tofsp, off_t offset,
1828                               size_t count)
1829 {
1830         VFS_FIND(recvfile);
1831         return handle->fns->recvfile_fn(handle, fromfd, tofsp, offset, count);
1832 }
1833
1834 int smb_vfs_call_rename(struct vfs_handle_struct *handle,
1835                         const struct smb_filename *smb_fname_src,
1836                         const struct smb_filename *smb_fname_dst)
1837 {
1838         VFS_FIND(rename);
1839         return handle->fns->rename_fn(handle, smb_fname_src, smb_fname_dst);
1840 }
1841
1842 int smb_vfs_call_fsync(struct vfs_handle_struct *handle,
1843                        struct files_struct *fsp)
1844 {
1845         VFS_FIND(fsync);
1846         return handle->fns->fsync_fn(handle, fsp);
1847 }
1848
1849 struct smb_vfs_call_fsync_state {
1850         int (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1851         int retval;
1852         struct vfs_aio_state vfs_aio_state;
1853 };
1854
1855 static void smb_vfs_call_fsync_done(struct tevent_req *subreq);
1856
1857 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1858                                            TALLOC_CTX *mem_ctx,
1859                                            struct tevent_context *ev,
1860                                            struct files_struct *fsp)
1861 {
1862         struct tevent_req *req, *subreq;
1863         struct smb_vfs_call_fsync_state *state;
1864
1865         req = tevent_req_create(mem_ctx, &state,
1866                                 struct smb_vfs_call_fsync_state);
1867         if (req == NULL) {
1868                 return NULL;
1869         }
1870         VFS_FIND(fsync_send);
1871         state->recv_fn = handle->fns->fsync_recv_fn;
1872
1873         subreq = handle->fns->fsync_send_fn(handle, state, ev, fsp);
1874         if (tevent_req_nomem(subreq, req)) {
1875                 return tevent_req_post(req, ev);
1876         }
1877         tevent_req_set_callback(subreq, smb_vfs_call_fsync_done, req);
1878         return req;
1879 }
1880
1881 static void smb_vfs_call_fsync_done(struct tevent_req *subreq)
1882 {
1883         struct tevent_req *req = tevent_req_callback_data(
1884                 subreq, struct tevent_req);
1885         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1886                 req, struct smb_vfs_call_fsync_state);
1887
1888         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1889         TALLOC_FREE(subreq);
1890         if (state->retval == -1) {
1891                 tevent_req_error(req, state->vfs_aio_state.error);
1892                 return;
1893         }
1894         tevent_req_done(req);
1895 }
1896
1897 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state)
1898 {
1899         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1900                 req, struct smb_vfs_call_fsync_state);
1901
1902         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1903                 return -1;
1904         }
1905         *vfs_aio_state = state->vfs_aio_state;
1906         return state->retval;
1907 }
1908
1909
1910 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1911                       struct smb_filename *smb_fname)
1912 {
1913         VFS_FIND(stat);
1914         return handle->fns->stat_fn(handle, smb_fname);
1915 }
1916
1917 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1918                        struct files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1919 {
1920         VFS_FIND(fstat);
1921         return handle->fns->fstat_fn(handle, fsp, sbuf);
1922 }
1923
1924 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1925                        struct smb_filename *smb_filename)
1926 {
1927         VFS_FIND(lstat);
1928         return handle->fns->lstat_fn(handle, smb_filename);
1929 }
1930
1931 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1932                                      struct files_struct *fsp,
1933                                      const SMB_STRUCT_STAT *sbuf)
1934 {
1935         VFS_FIND(get_alloc_size);
1936         return handle->fns->get_alloc_size_fn(handle, fsp, sbuf);
1937 }
1938
1939 int smb_vfs_call_unlink(struct vfs_handle_struct *handle,
1940                         const struct smb_filename *smb_fname)
1941 {
1942         VFS_FIND(unlink);
1943         return handle->fns->unlink_fn(handle, smb_fname);
1944 }
1945
1946 int smb_vfs_call_chmod(struct vfs_handle_struct *handle,
1947                         const struct smb_filename *smb_fname,
1948                         mode_t mode)
1949 {
1950         VFS_FIND(chmod);
1951         return handle->fns->chmod_fn(handle, smb_fname, mode);
1952 }
1953
1954 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1955                         struct files_struct *fsp, mode_t mode)
1956 {
1957         VFS_FIND(fchmod);
1958         return handle->fns->fchmod_fn(handle, fsp, mode);
1959 }
1960
1961 int smb_vfs_call_chown(struct vfs_handle_struct *handle,
1962                         const struct smb_filename *smb_fname,
1963                         uid_t uid,
1964                         gid_t gid)
1965 {
1966         VFS_FIND(chown);
1967         return handle->fns->chown_fn(handle, smb_fname, uid, gid);
1968 }
1969
1970 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1971                         struct files_struct *fsp, uid_t uid, gid_t gid)
1972 {
1973         VFS_FIND(fchown);
1974         return handle->fns->fchown_fn(handle, fsp, uid, gid);
1975 }
1976
1977 int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
1978                         const struct smb_filename *smb_fname,
1979                         uid_t uid,
1980                         gid_t gid)
1981 {
1982         VFS_FIND(lchown);
1983         return handle->fns->lchown_fn(handle, smb_fname, uid, gid);
1984 }
1985
1986 NTSTATUS vfs_chown_fsp(files_struct *fsp, uid_t uid, gid_t gid)
1987 {
1988         int ret;
1989         bool as_root = false;
1990         NTSTATUS status;
1991
1992         if (fsp->fh->fd != -1) {
1993                 /* Try fchown. */
1994                 ret = SMB_VFS_FCHOWN(fsp, uid, gid);
1995                 if (ret == 0) {
1996                         return NT_STATUS_OK;
1997                 }
1998                 if (ret == -1 && errno != ENOSYS) {
1999                         return map_nt_error_from_unix(errno);
2000                 }
2001         }
2002
2003         as_root = (geteuid() == 0);
2004
2005         if (as_root) {
2006                 /*
2007                  * We are being asked to chown as root. Make
2008                  * sure we chdir() into the path to pin it,
2009                  * and always act using lchown to ensure we
2010                  * don't deref any symbolic links.
2011                  */
2012                 char *saved_dir = NULL;
2013                 char *parent_dir = NULL;
2014                 const char *final_component = NULL;
2015                 struct smb_filename *local_smb_fname = NULL;
2016
2017                 saved_dir = vfs_GetWd(talloc_tos(),fsp->conn);
2018                 if (!saved_dir) {
2019                         status = map_nt_error_from_unix(errno);
2020                         DEBUG(0,("vfs_chown_fsp: failed to get "
2021                                 "current working directory. Error was %s\n",
2022                                 strerror(errno)));
2023                         return status;
2024                 }
2025
2026                 if (!parent_dirname(talloc_tos(),
2027                                 fsp->fsp_name->base_name,
2028                                 &parent_dir,
2029                                 &final_component)) {
2030                         return NT_STATUS_NO_MEMORY;
2031                 }
2032
2033                 /* cd into the parent dir to pin it. */
2034                 ret = vfs_ChDir(fsp->conn, parent_dir);
2035                 if (ret == -1) {
2036                         return map_nt_error_from_unix(errno);
2037                 }
2038
2039                 local_smb_fname = synthetic_smb_fname(talloc_tos(),
2040                                         final_component,
2041                                         NULL,
2042                                         NULL,
2043                                         fsp->fsp_name->flags);
2044                 if (local_smb_fname == NULL) {
2045                         status = NT_STATUS_NO_MEMORY;
2046                         goto out;
2047                 }
2048
2049                 /* Must use lstat here. */
2050                 ret = SMB_VFS_LSTAT(fsp->conn, local_smb_fname);
2051                 if (ret == -1) {
2052                         status = map_nt_error_from_unix(errno);
2053                         goto out;
2054                 }
2055
2056                 /* Ensure it matches the fsp stat. */
2057                 if (!check_same_stat(&local_smb_fname->st,
2058                                 &fsp->fsp_name->st)) {
2059                         status = NT_STATUS_ACCESS_DENIED;
2060                         goto out;
2061                 }
2062
2063                 ret = SMB_VFS_LCHOWN(fsp->conn,
2064                         local_smb_fname,
2065                         uid, gid);
2066
2067                 if (ret == 0) {
2068                         status = NT_STATUS_OK;
2069                 } else {
2070                         status = map_nt_error_from_unix(errno);
2071                 }
2072
2073   out:
2074
2075                 vfs_ChDir(fsp->conn,saved_dir);
2076                 TALLOC_FREE(local_smb_fname);
2077                 TALLOC_FREE(saved_dir);
2078                 TALLOC_FREE(parent_dir);
2079
2080                 return status;
2081         }
2082
2083         if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
2084                 ret = SMB_VFS_LCHOWN(fsp->conn,
2085                         fsp->fsp_name,
2086                         uid, gid);
2087         } else {
2088                 ret = SMB_VFS_CHOWN(fsp->conn,
2089                         fsp->fsp_name,
2090                         uid, gid);
2091         }
2092
2093         if (ret == 0) {
2094                 status = NT_STATUS_OK;
2095         } else {
2096                 status = map_nt_error_from_unix(errno);
2097         }
2098         return status;
2099 }
2100
2101 int smb_vfs_call_chdir(struct vfs_handle_struct *handle, const char *path)
2102 {
2103         VFS_FIND(chdir);
2104         return handle->fns->chdir_fn(handle, path);
2105 }
2106
2107 char *smb_vfs_call_getwd(struct vfs_handle_struct *handle)
2108 {
2109         VFS_FIND(getwd);
2110         return handle->fns->getwd_fn(handle);
2111 }
2112
2113 int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
2114                         const struct smb_filename *smb_fname,
2115                         struct smb_file_time *ft)
2116 {
2117         VFS_FIND(ntimes);
2118         return handle->fns->ntimes_fn(handle, smb_fname, ft);
2119 }
2120
2121 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
2122                            struct files_struct *fsp, off_t offset)
2123 {
2124         VFS_FIND(ftruncate);
2125         return handle->fns->ftruncate_fn(handle, fsp, offset);
2126 }
2127
2128 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
2129                            struct files_struct *fsp,
2130                            uint32_t mode,
2131                            off_t offset,
2132                            off_t len)
2133 {
2134         VFS_FIND(fallocate);
2135         return handle->fns->fallocate_fn(handle, fsp, mode, offset, len);
2136 }
2137
2138 int smb_vfs_call_kernel_flock(struct vfs_handle_struct *handle,
2139                               struct files_struct *fsp, uint32_t share_mode,
2140                               uint32_t access_mask)
2141 {
2142         VFS_FIND(kernel_flock);
2143         return handle->fns->kernel_flock_fn(handle, fsp, share_mode,
2144                                          access_mask);
2145 }
2146
2147 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
2148                                 struct files_struct *fsp, int leasetype)
2149 {
2150         VFS_FIND(linux_setlease);
2151         return handle->fns->linux_setlease_fn(handle, fsp, leasetype);
2152 }
2153
2154 int smb_vfs_call_symlink(struct vfs_handle_struct *handle, const char *oldpath,
2155                          const char *newpath)
2156 {
2157         VFS_FIND(symlink);
2158         return handle->fns->symlink_fn(handle, oldpath, newpath);
2159 }
2160
2161 int smb_vfs_call_readlink(struct vfs_handle_struct *handle,
2162                               const char *path, char *buf, size_t bufsiz)
2163 {
2164         VFS_FIND(readlink);
2165         return handle->fns->readlink_fn(handle, path, buf, bufsiz);
2166 }
2167
2168 int smb_vfs_call_link(struct vfs_handle_struct *handle,
2169                         const struct smb_filename *old_smb_fname,
2170                         const struct smb_filename *new_smb_fname)
2171 {
2172         VFS_FIND(link);
2173         return handle->fns->link_fn(handle, old_smb_fname, new_smb_fname);
2174 }
2175
2176 int smb_vfs_call_mknod(struct vfs_handle_struct *handle,
2177                         const struct smb_filename *smb_fname,
2178                         mode_t mode,
2179                         SMB_DEV_T dev)
2180 {
2181         VFS_FIND(mknod);
2182         return handle->fns->mknod_fn(handle, smb_fname, mode, dev);
2183 }
2184
2185 char *smb_vfs_call_realpath(struct vfs_handle_struct *handle, const char *path)
2186 {
2187         VFS_FIND(realpath);
2188         return handle->fns->realpath_fn(handle, path);
2189 }
2190
2191 int smb_vfs_call_chflags(struct vfs_handle_struct *handle,
2192                         const struct smb_filename *smb_fname,
2193                         unsigned int flags)
2194 {
2195         VFS_FIND(chflags);
2196         return handle->fns->chflags_fn(handle, smb_fname, flags);
2197 }
2198
2199 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
2200                                            const SMB_STRUCT_STAT *sbuf)
2201 {
2202         VFS_FIND(file_id_create);
2203         return handle->fns->file_id_create_fn(handle, sbuf);
2204 }
2205
2206 NTSTATUS smb_vfs_call_streaminfo(struct vfs_handle_struct *handle,
2207                                  struct files_struct *fsp,
2208                                  const struct smb_filename *smb_fname,
2209                                  TALLOC_CTX *mem_ctx,
2210                                  unsigned int *num_streams,
2211                                  struct stream_struct **streams)
2212 {
2213         VFS_FIND(streaminfo);
2214         return handle->fns->streaminfo_fn(handle, fsp, smb_fname, mem_ctx,
2215                                           num_streams, streams);
2216 }
2217
2218 int smb_vfs_call_get_real_filename(struct vfs_handle_struct *handle,
2219                                    const char *path, const char *name,
2220                                    TALLOC_CTX *mem_ctx, char **found_name)
2221 {
2222         VFS_FIND(get_real_filename);
2223         return handle->fns->get_real_filename_fn(handle, path, name, mem_ctx,
2224                                                  found_name);
2225 }
2226
2227 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
2228                                      const char *filename)
2229 {
2230         VFS_FIND(connectpath);
2231         return handle->fns->connectpath_fn(handle, filename);
2232 }
2233
2234 bool smb_vfs_call_strict_lock(struct vfs_handle_struct *handle,
2235                               struct files_struct *fsp,
2236                               struct lock_struct *plock)
2237 {
2238         VFS_FIND(strict_lock);
2239         return handle->fns->strict_lock_fn(handle, fsp, plock);
2240 }
2241
2242 void smb_vfs_call_strict_unlock(struct vfs_handle_struct *handle,
2243                                 struct files_struct *fsp,
2244                                 struct lock_struct *plock)
2245 {
2246         VFS_FIND(strict_unlock);
2247         handle->fns->strict_unlock_fn(handle, fsp, plock);
2248 }
2249
2250 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
2251                                      const char *name,
2252                                      enum vfs_translate_direction direction,
2253                                      TALLOC_CTX *mem_ctx,
2254                                      char **mapped_name)
2255 {
2256         VFS_FIND(translate_name);
2257         return handle->fns->translate_name_fn(handle, name, direction, mem_ctx,
2258                                               mapped_name);
2259 }
2260
2261 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
2262                             struct files_struct *fsp,
2263                             TALLOC_CTX *ctx,
2264                             uint32_t function,
2265                             uint16_t req_flags,
2266                             const uint8_t *in_data,
2267                             uint32_t in_len,
2268                             uint8_t **out_data,
2269                             uint32_t max_out_len,
2270                             uint32_t *out_len)
2271 {
2272         VFS_FIND(fsctl);
2273         return handle->fns->fsctl_fn(handle, fsp, ctx, function, req_flags,
2274                                      in_data, in_len, out_data, max_out_len,
2275                                      out_len);
2276 }
2277
2278 NTSTATUS smb_vfs_call_get_dos_attributes(struct vfs_handle_struct *handle,
2279                                          struct smb_filename *smb_fname,
2280                                          uint32_t *dosmode)
2281 {
2282         VFS_FIND(get_dos_attributes);
2283         return handle->fns->get_dos_attributes_fn(handle, smb_fname, dosmode);
2284 }
2285
2286 NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
2287                                           struct files_struct *fsp,
2288                                           uint32_t *dosmode)
2289 {
2290         VFS_FIND(fget_dos_attributes);
2291         return handle->fns->fget_dos_attributes_fn(handle, fsp, dosmode);
2292 }
2293
2294 NTSTATUS smb_vfs_call_set_dos_attributes(struct vfs_handle_struct *handle,
2295                                          const struct smb_filename *smb_fname,
2296                                          uint32_t dosmode)
2297 {
2298         VFS_FIND(set_dos_attributes);
2299         return handle->fns->set_dos_attributes_fn(handle, smb_fname, dosmode);
2300 }
2301
2302 NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
2303                                           struct files_struct *fsp,
2304                                           uint32_t dosmode)
2305 {
2306         VFS_FIND(set_dos_attributes);
2307         return handle->fns->fset_dos_attributes_fn(handle, fsp, dosmode);
2308 }
2309
2310 struct tevent_req *smb_vfs_call_copy_chunk_send(struct vfs_handle_struct *handle,
2311                                                 TALLOC_CTX *mem_ctx,
2312                                                 struct tevent_context *ev,
2313                                                 struct files_struct *src_fsp,
2314                                                 off_t src_off,
2315                                                 struct files_struct *dest_fsp,
2316                                                 off_t dest_off,
2317                                                 off_t num,
2318                                                 uint32_t flags)
2319 {
2320         VFS_FIND(copy_chunk_send);
2321         return handle->fns->copy_chunk_send_fn(handle, mem_ctx, ev, src_fsp,
2322                                                src_off, dest_fsp, dest_off, num,
2323                                                flags);
2324 }
2325
2326 NTSTATUS smb_vfs_call_copy_chunk_recv(struct vfs_handle_struct *handle,
2327                                       struct tevent_req *req,
2328                                       off_t *copied)
2329 {
2330         VFS_FIND(copy_chunk_recv);
2331         return handle->fns->copy_chunk_recv_fn(handle, req, copied);
2332 }
2333
2334 NTSTATUS smb_vfs_call_get_compression(vfs_handle_struct *handle,
2335                                       TALLOC_CTX *mem_ctx,
2336                                       struct files_struct *fsp,
2337                                       struct smb_filename *smb_fname,
2338                                       uint16_t *_compression_fmt)
2339 {
2340         VFS_FIND(get_compression);
2341         return handle->fns->get_compression_fn(handle, mem_ctx, fsp, smb_fname,
2342                                                _compression_fmt);
2343 }
2344
2345 NTSTATUS smb_vfs_call_set_compression(vfs_handle_struct *handle,
2346                                       TALLOC_CTX *mem_ctx,
2347                                       struct files_struct *fsp,
2348                                       uint16_t compression_fmt)
2349 {
2350         VFS_FIND(set_compression);
2351         return handle->fns->set_compression_fn(handle, mem_ctx, fsp,
2352                                                compression_fmt);
2353 }
2354
2355 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
2356                                       TALLOC_CTX *mem_ctx,
2357                                       const char *service_path,
2358                                       char **base_volume)
2359 {
2360         VFS_FIND(snap_check_path);
2361         return handle->fns->snap_check_path_fn(handle, mem_ctx, service_path,
2362                                                base_volume);
2363 }
2364
2365 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
2366                                   TALLOC_CTX *mem_ctx,
2367                                   const char *base_volume,
2368                                   time_t *tstamp,
2369                                   bool rw,
2370                                   char **base_path,
2371                                   char **snap_path)
2372 {
2373         VFS_FIND(snap_create);
2374         return handle->fns->snap_create_fn(handle, mem_ctx, base_volume, tstamp,
2375                                            rw, base_path, snap_path);
2376 }
2377
2378 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
2379                                   TALLOC_CTX *mem_ctx,
2380                                   char *base_path,
2381                                   char *snap_path)
2382 {
2383         VFS_FIND(snap_delete);
2384         return handle->fns->snap_delete_fn(handle, mem_ctx, base_path,
2385                                            snap_path);
2386 }
2387
2388 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
2389                                   struct files_struct *fsp,
2390                                   uint32_t security_info,
2391                                   TALLOC_CTX *mem_ctx,
2392                                   struct security_descriptor **ppdesc)
2393 {
2394         VFS_FIND(fget_nt_acl);
2395         return handle->fns->fget_nt_acl_fn(handle, fsp, security_info,
2396                                            mem_ctx, ppdesc);
2397 }
2398
2399 NTSTATUS smb_vfs_call_get_nt_acl(struct vfs_handle_struct *handle,
2400                                  const struct smb_filename *smb_fname,
2401                                  uint32_t security_info,
2402                                  TALLOC_CTX *mem_ctx,
2403                                  struct security_descriptor **ppdesc)
2404 {
2405         VFS_FIND(get_nt_acl);
2406         return handle->fns->get_nt_acl_fn(handle,
2407                                 smb_fname,
2408                                 security_info,
2409                                 mem_ctx,
2410                                 ppdesc);
2411 }
2412
2413 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
2414                                   struct files_struct *fsp,
2415                                   uint32_t security_info_sent,
2416                                   const struct security_descriptor *psd)
2417 {
2418         VFS_FIND(fset_nt_acl);
2419         return handle->fns->fset_nt_acl_fn(handle, fsp, security_info_sent, 
2420                                            psd);
2421 }
2422
2423 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
2424                                  struct smb_filename *file,
2425                                  struct security_acl *sacl,
2426                                  uint32_t access_requested,
2427                                  uint32_t access_denied)
2428 {
2429         VFS_FIND(audit_file);
2430         return handle->fns->audit_file_fn(handle, 
2431                                           file, 
2432                                           sacl, 
2433                                           access_requested, 
2434                                           access_denied);
2435 }
2436
2437 int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle,
2438                 const struct smb_filename *smb_fname,
2439                 mode_t mode)
2440 {
2441         VFS_FIND(chmod_acl);
2442         return handle->fns->chmod_acl_fn(handle, smb_fname, mode);
2443 }
2444
2445 int smb_vfs_call_fchmod_acl(struct vfs_handle_struct *handle,
2446                             struct files_struct *fsp, mode_t mode)
2447 {
2448         VFS_FIND(fchmod_acl);
2449         return handle->fns->fchmod_acl_fn(handle, fsp, mode);
2450 }
2451
2452 SMB_ACL_T smb_vfs_call_sys_acl_get_file(struct vfs_handle_struct *handle,
2453                                         const struct smb_filename *smb_fname,
2454                                         SMB_ACL_TYPE_T type,
2455                                         TALLOC_CTX *mem_ctx)
2456 {
2457         VFS_FIND(sys_acl_get_file);
2458         return handle->fns->sys_acl_get_file_fn(handle, smb_fname, type, mem_ctx);
2459 }
2460
2461 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
2462                                       struct files_struct *fsp,
2463                                       TALLOC_CTX *mem_ctx)
2464 {
2465         VFS_FIND(sys_acl_get_fd);
2466         return handle->fns->sys_acl_get_fd_fn(handle, fsp, mem_ctx);
2467 }
2468
2469 int smb_vfs_call_sys_acl_blob_get_file(struct vfs_handle_struct *handle,
2470                                 const struct smb_filename *smb_fname,
2471                                 TALLOC_CTX *mem_ctx,
2472                                 char **blob_description,
2473                                 DATA_BLOB *blob)
2474 {
2475         VFS_FIND(sys_acl_blob_get_file);
2476         return handle->fns->sys_acl_blob_get_file_fn(handle, smb_fname,
2477                         mem_ctx, blob_description, blob);
2478 }
2479
2480 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
2481                                      struct files_struct *fsp,
2482                                      TALLOC_CTX *mem_ctx, 
2483                                      char **blob_description,
2484                                      DATA_BLOB *blob)
2485 {
2486         VFS_FIND(sys_acl_blob_get_fd);
2487         return handle->fns->sys_acl_blob_get_fd_fn(handle, fsp, mem_ctx, blob_description, blob);
2488 }
2489
2490 int smb_vfs_call_sys_acl_set_file(struct vfs_handle_struct *handle,
2491                                 const struct smb_filename *smb_fname,
2492                                 SMB_ACL_TYPE_T acltype,
2493                                 SMB_ACL_T theacl)
2494 {
2495         VFS_FIND(sys_acl_set_file);
2496         return handle->fns->sys_acl_set_file_fn(handle, smb_fname,
2497                                 acltype, theacl);
2498 }
2499
2500 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
2501                                 struct files_struct *fsp, SMB_ACL_T theacl)
2502 {
2503         VFS_FIND(sys_acl_set_fd);
2504         return handle->fns->sys_acl_set_fd_fn(handle, fsp, theacl);
2505 }
2506
2507 int smb_vfs_call_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
2508                                 const struct smb_filename *smb_fname)
2509 {
2510         VFS_FIND(sys_acl_delete_def_file);
2511         return handle->fns->sys_acl_delete_def_file_fn(handle, smb_fname);
2512 }
2513
2514 ssize_t smb_vfs_call_getxattr(struct vfs_handle_struct *handle,
2515                                 const struct smb_filename *smb_fname,
2516                                 const char *name,
2517                                 void *value,
2518                                 size_t size)
2519 {
2520         VFS_FIND(getxattr);
2521         return handle->fns->getxattr_fn(handle, smb_fname, name, value, size);
2522 }
2523
2524 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
2525                                struct files_struct *fsp, const char *name,
2526                                void *value, size_t size)
2527 {
2528         VFS_FIND(fgetxattr);
2529         return handle->fns->fgetxattr_fn(handle, fsp, name, value, size);
2530 }
2531
2532 ssize_t smb_vfs_call_listxattr(struct vfs_handle_struct *handle,
2533                                 const struct smb_filename *smb_fname,
2534                                 char *list,
2535                                 size_t size)
2536 {
2537         VFS_FIND(listxattr);
2538         return handle->fns->listxattr_fn(handle, smb_fname, list, size);
2539 }
2540
2541 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
2542                                 struct files_struct *fsp, char *list,
2543                                 size_t size)
2544 {
2545         VFS_FIND(flistxattr);
2546         return handle->fns->flistxattr_fn(handle, fsp, list, size);
2547 }
2548
2549 int smb_vfs_call_removexattr(struct vfs_handle_struct *handle,
2550                                 const struct smb_filename *smb_fname,
2551                                 const char *name)
2552 {
2553         VFS_FIND(removexattr);
2554         return handle->fns->removexattr_fn(handle, smb_fname, name);
2555 }
2556
2557 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
2558                               struct files_struct *fsp, const char *name)
2559 {
2560         VFS_FIND(fremovexattr);
2561         return handle->fns->fremovexattr_fn(handle, fsp, name);
2562 }
2563
2564 int smb_vfs_call_setxattr(struct vfs_handle_struct *handle,
2565                         const struct smb_filename *smb_fname,
2566                         const char *name,
2567                         const void *value,
2568                         size_t size,
2569                         int flags)
2570 {
2571         VFS_FIND(setxattr);
2572         return handle->fns->setxattr_fn(handle, smb_fname,
2573                         name, value, size, flags);
2574 }
2575
2576 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
2577                            struct files_struct *fsp, const char *name,
2578                            const void *value, size_t size, int flags)
2579 {
2580         VFS_FIND(fsetxattr);
2581         return handle->fns->fsetxattr_fn(handle, fsp, name, value, size, flags);
2582 }
2583
2584 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
2585                             struct files_struct *fsp)
2586 {
2587         VFS_FIND(aio_force);
2588         return handle->fns->aio_force_fn(handle, fsp);
2589 }
2590
2591 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
2592                                      struct files_struct *fsp,
2593                                      TALLOC_CTX *mem_ctx,
2594                                      DATA_BLOB *cookie)
2595 {
2596         VFS_FIND(durable_cookie);
2597         return handle->fns->durable_cookie_fn(handle, fsp, mem_ctx, cookie);
2598 }
2599
2600 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
2601                                          struct files_struct *fsp,
2602                                          const DATA_BLOB old_cookie,
2603                                          TALLOC_CTX *mem_ctx,
2604                                          DATA_BLOB *new_cookie)
2605 {
2606         VFS_FIND(durable_disconnect);
2607         return handle->fns->durable_disconnect_fn(handle, fsp, old_cookie,
2608                                                   mem_ctx, new_cookie);
2609 }
2610
2611 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
2612                                         struct smb_request *smb1req,
2613                                         struct smbXsrv_open *op,
2614                                         const DATA_BLOB old_cookie,
2615                                         TALLOC_CTX *mem_ctx,
2616                                         struct files_struct **fsp,
2617                                         DATA_BLOB *new_cookie)
2618 {
2619         VFS_FIND(durable_reconnect);
2620         return handle->fns->durable_reconnect_fn(handle, smb1req, op,
2621                                                  old_cookie, mem_ctx, fsp,
2622                                                  new_cookie);
2623 }
2624
2625 NTSTATUS smb_vfs_call_readdir_attr(struct vfs_handle_struct *handle,
2626                                    const struct smb_filename *fname,
2627                                    TALLOC_CTX *mem_ctx,
2628                                    struct readdir_attr_data **attr_data)
2629 {
2630         VFS_FIND(readdir_attr);
2631         return handle->fns->readdir_attr_fn(handle, fname, mem_ctx, attr_data);
2632 }