s3: VFS: Change SMB_VFS_SYS_ACL_GET_FILE to use const struct smb_filename * instead...
[samba.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 char *path, uint64_t *bsize,
1472                                 uint64_t *dfree, uint64_t *dsize)
1473 {
1474         VFS_FIND(disk_free);
1475         return handle->fns->disk_free_fn(handle, path, bsize, dfree, dsize);
1476 }
1477
1478 int smb_vfs_call_get_quota(struct vfs_handle_struct *handle, const char *path,
1479                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1480                            SMB_DISK_QUOTA *qt)
1481 {
1482         VFS_FIND(get_quota);
1483         return handle->fns->get_quota_fn(handle, path, qtype, id, qt);
1484 }
1485
1486 int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
1487                            enum SMB_QUOTA_TYPE qtype, unid_t id,
1488                            SMB_DISK_QUOTA *qt)
1489 {
1490         VFS_FIND(set_quota);
1491         return handle->fns->set_quota_fn(handle, qtype, id, qt);
1492 }
1493
1494 int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
1495                                       struct files_struct *fsp,
1496                                       struct shadow_copy_data *shadow_copy_data,
1497                                       bool labels)
1498 {
1499         VFS_FIND(get_shadow_copy_data);
1500         return handle->fns->get_shadow_copy_data_fn(handle, fsp, 
1501                                                     shadow_copy_data,
1502                                                     labels);
1503 }
1504 int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, const char *path,
1505                          struct vfs_statvfs_struct *statbuf)
1506 {
1507         VFS_FIND(statvfs);
1508         return handle->fns->statvfs_fn(handle, path, statbuf);
1509 }
1510
1511 uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
1512                         enum timestamp_set_resolution *p_ts_res)
1513 {
1514         VFS_FIND(fs_capabilities);
1515         return handle->fns->fs_capabilities_fn(handle, p_ts_res);
1516 }
1517
1518 NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
1519                                         struct dfs_GetDFSReferral *r)
1520 {
1521         VFS_FIND(get_dfs_referrals);
1522         return handle->fns->get_dfs_referrals_fn(handle, r);
1523 }
1524
1525 DIR *smb_vfs_call_opendir(struct vfs_handle_struct *handle,
1526                                         const struct smb_filename *smb_fname,
1527                                         const char *mask,
1528                                         uint32_t attributes)
1529 {
1530         VFS_FIND(opendir);
1531         return handle->fns->opendir_fn(handle, smb_fname, mask, attributes);
1532 }
1533
1534 DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
1535                                         struct files_struct *fsp,
1536                                         const char *mask,
1537                                         uint32_t attributes)
1538 {
1539         VFS_FIND(fdopendir);
1540         return handle->fns->fdopendir_fn(handle, fsp, mask, attributes);
1541 }
1542
1543 struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
1544                                               DIR *dirp,
1545                                               SMB_STRUCT_STAT *sbuf)
1546 {
1547         VFS_FIND(readdir);
1548         return handle->fns->readdir_fn(handle, dirp, sbuf);
1549 }
1550
1551 void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
1552                           DIR *dirp, long offset)
1553 {
1554         VFS_FIND(seekdir);
1555         handle->fns->seekdir_fn(handle, dirp, offset);
1556 }
1557
1558 long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
1559                           DIR *dirp)
1560 {
1561         VFS_FIND(telldir);
1562         return handle->fns->telldir_fn(handle, dirp);
1563 }
1564
1565 void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
1566                              DIR *dirp)
1567 {
1568         VFS_FIND(rewind_dir);
1569         handle->fns->rewind_dir_fn(handle, dirp);
1570 }
1571
1572 int smb_vfs_call_mkdir(struct vfs_handle_struct *handle,
1573                         const struct smb_filename *smb_fname,
1574                         mode_t mode)
1575 {
1576         VFS_FIND(mkdir);
1577         return handle->fns->mkdir_fn(handle, smb_fname, mode);
1578 }
1579
1580 int smb_vfs_call_rmdir(struct vfs_handle_struct *handle,
1581                         const struct smb_filename *smb_fname)
1582 {
1583         VFS_FIND(rmdir);
1584         return handle->fns->rmdir_fn(handle, smb_fname);
1585 }
1586
1587 int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
1588                           DIR *dir)
1589 {
1590         VFS_FIND(closedir);
1591         return handle->fns->closedir_fn(handle, dir);
1592 }
1593
1594 void smb_vfs_call_init_search_op(struct vfs_handle_struct *handle,
1595                                  DIR *dirp)
1596 {
1597         VFS_FIND(init_search_op);
1598         handle->fns->init_search_op_fn(handle, dirp);
1599 }
1600
1601 int smb_vfs_call_open(struct vfs_handle_struct *handle,
1602                       struct smb_filename *smb_fname, struct files_struct *fsp,
1603                       int flags, mode_t mode)
1604 {
1605         VFS_FIND(open);
1606         return handle->fns->open_fn(handle, smb_fname, fsp, flags, mode);
1607 }
1608
1609 NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle,
1610                                   struct smb_request *req,
1611                                   uint16_t root_dir_fid,
1612                                   struct smb_filename *smb_fname,
1613                                   uint32_t access_mask,
1614                                   uint32_t share_access,
1615                                   uint32_t create_disposition,
1616                                   uint32_t create_options,
1617                                   uint32_t file_attributes,
1618                                   uint32_t oplock_request,
1619                                   struct smb2_lease *lease,
1620                                   uint64_t allocation_size,
1621                                   uint32_t private_flags,
1622                                   struct security_descriptor *sd,
1623                                   struct ea_list *ea_list,
1624                                   files_struct **result,
1625                                   int *pinfo,
1626                                   const struct smb2_create_blobs *in_context_blobs,
1627                                   struct smb2_create_blobs *out_context_blobs)
1628 {
1629         VFS_FIND(create_file);
1630         return handle->fns->create_file_fn(
1631                 handle, req, root_dir_fid, smb_fname, access_mask,
1632                 share_access, create_disposition, create_options,
1633                 file_attributes, oplock_request, lease, allocation_size,
1634                 private_flags, sd, ea_list,
1635                 result, pinfo, in_context_blobs, out_context_blobs);
1636 }
1637
1638 int smb_vfs_call_close(struct vfs_handle_struct *handle,
1639                        struct files_struct *fsp)
1640 {
1641         VFS_FIND(close);
1642         return handle->fns->close_fn(handle, fsp);
1643 }
1644
1645 ssize_t smb_vfs_call_read(struct vfs_handle_struct *handle,
1646                           struct files_struct *fsp, void *data, size_t n)
1647 {
1648         VFS_FIND(read);
1649         return handle->fns->read_fn(handle, fsp, data, n);
1650 }
1651
1652 ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
1653                            struct files_struct *fsp, void *data, size_t n,
1654                            off_t offset)
1655 {
1656         VFS_FIND(pread);
1657         return handle->fns->pread_fn(handle, fsp, data, n, offset);
1658 }
1659
1660 struct smb_vfs_call_pread_state {
1661         ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1662         ssize_t retval;
1663         struct vfs_aio_state vfs_aio_state;
1664 };
1665
1666 static void smb_vfs_call_pread_done(struct tevent_req *subreq);
1667
1668 struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle,
1669                                            TALLOC_CTX *mem_ctx,
1670                                            struct tevent_context *ev,
1671                                            struct files_struct *fsp,
1672                                            void *data,
1673                                            size_t n, off_t offset)
1674 {
1675         struct tevent_req *req, *subreq;
1676         struct smb_vfs_call_pread_state *state;
1677
1678         req = tevent_req_create(mem_ctx, &state,
1679                                 struct smb_vfs_call_pread_state);
1680         if (req == NULL) {
1681                 return NULL;
1682         }
1683         VFS_FIND(pread_send);
1684         state->recv_fn = handle->fns->pread_recv_fn;
1685
1686         subreq = handle->fns->pread_send_fn(handle, state, ev, fsp, data, n,
1687                                             offset);
1688         if (tevent_req_nomem(subreq, req)) {
1689                 return tevent_req_post(req, ev);
1690         }
1691         tevent_req_set_callback(subreq, smb_vfs_call_pread_done, req);
1692         return req;
1693 }
1694
1695 static void smb_vfs_call_pread_done(struct tevent_req *subreq)
1696 {
1697         struct tevent_req *req = tevent_req_callback_data(
1698                 subreq, struct tevent_req);
1699         struct smb_vfs_call_pread_state *state = tevent_req_data(
1700                 req, struct smb_vfs_call_pread_state);
1701
1702         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1703         TALLOC_FREE(subreq);
1704         if (state->retval == -1) {
1705                 tevent_req_error(req, state->vfs_aio_state.error);
1706                 return;
1707         }
1708         tevent_req_done(req);
1709 }
1710
1711 ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req,
1712                            struct vfs_aio_state *vfs_aio_state)
1713 {
1714         struct smb_vfs_call_pread_state *state = tevent_req_data(
1715                 req, struct smb_vfs_call_pread_state);
1716
1717         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1718                 return -1;
1719         }
1720         *vfs_aio_state = state->vfs_aio_state;
1721         return state->retval;
1722 }
1723
1724 ssize_t smb_vfs_call_write(struct vfs_handle_struct *handle,
1725                            struct files_struct *fsp, const void *data,
1726                            size_t n)
1727 {
1728         VFS_FIND(write);
1729         return handle->fns->write_fn(handle, fsp, data, n);
1730 }
1731
1732 ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
1733                             struct files_struct *fsp, const void *data,
1734                             size_t n, off_t offset)
1735 {
1736         VFS_FIND(pwrite);
1737         return handle->fns->pwrite_fn(handle, fsp, data, n, offset);
1738 }
1739
1740 struct smb_vfs_call_pwrite_state {
1741         ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1742         ssize_t retval;
1743         struct vfs_aio_state vfs_aio_state;
1744 };
1745
1746 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq);
1747
1748 struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle,
1749                                             TALLOC_CTX *mem_ctx,
1750                                             struct tevent_context *ev,
1751                                             struct files_struct *fsp,
1752                                             const void *data,
1753                                             size_t n, off_t offset)
1754 {
1755         struct tevent_req *req, *subreq;
1756         struct smb_vfs_call_pwrite_state *state;
1757
1758         req = tevent_req_create(mem_ctx, &state,
1759                                 struct smb_vfs_call_pwrite_state);
1760         if (req == NULL) {
1761                 return NULL;
1762         }
1763         VFS_FIND(pwrite_send);
1764         state->recv_fn = handle->fns->pwrite_recv_fn;
1765
1766         subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n,
1767                                              offset);
1768         if (tevent_req_nomem(subreq, req)) {
1769                 return tevent_req_post(req, ev);
1770         }
1771         tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req);
1772         return req;
1773 }
1774
1775 static void smb_vfs_call_pwrite_done(struct tevent_req *subreq)
1776 {
1777         struct tevent_req *req = tevent_req_callback_data(
1778                 subreq, struct tevent_req);
1779         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1780                 req, struct smb_vfs_call_pwrite_state);
1781
1782         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1783         TALLOC_FREE(subreq);
1784         if (state->retval == -1) {
1785                 tevent_req_error(req, state->vfs_aio_state.error);
1786                 return;
1787         }
1788         tevent_req_done(req);
1789 }
1790
1791 ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req,
1792                             struct vfs_aio_state *vfs_aio_state)
1793 {
1794         struct smb_vfs_call_pwrite_state *state = tevent_req_data(
1795                 req, struct smb_vfs_call_pwrite_state);
1796
1797         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1798                 return -1;
1799         }
1800         *vfs_aio_state = state->vfs_aio_state;
1801         return state->retval;
1802 }
1803
1804 off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
1805                              struct files_struct *fsp, off_t offset,
1806                              int whence)
1807 {
1808         VFS_FIND(lseek);
1809         return handle->fns->lseek_fn(handle, fsp, offset, whence);
1810 }
1811
1812 ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
1813                               files_struct *fromfsp, const DATA_BLOB *header,
1814                               off_t offset, size_t count)
1815 {
1816         VFS_FIND(sendfile);
1817         return handle->fns->sendfile_fn(handle, tofd, fromfsp, header, offset,
1818                                         count);
1819 }
1820
1821 ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
1822                               files_struct *tofsp, off_t offset,
1823                               size_t count)
1824 {
1825         VFS_FIND(recvfile);
1826         return handle->fns->recvfile_fn(handle, fromfd, tofsp, offset, count);
1827 }
1828
1829 int smb_vfs_call_rename(struct vfs_handle_struct *handle,
1830                         const struct smb_filename *smb_fname_src,
1831                         const struct smb_filename *smb_fname_dst)
1832 {
1833         VFS_FIND(rename);
1834         return handle->fns->rename_fn(handle, smb_fname_src, smb_fname_dst);
1835 }
1836
1837 int smb_vfs_call_fsync(struct vfs_handle_struct *handle,
1838                        struct files_struct *fsp)
1839 {
1840         VFS_FIND(fsync);
1841         return handle->fns->fsync_fn(handle, fsp);
1842 }
1843
1844 struct smb_vfs_call_fsync_state {
1845         int (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state);
1846         int retval;
1847         struct vfs_aio_state vfs_aio_state;
1848 };
1849
1850 static void smb_vfs_call_fsync_done(struct tevent_req *subreq);
1851
1852 struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
1853                                            TALLOC_CTX *mem_ctx,
1854                                            struct tevent_context *ev,
1855                                            struct files_struct *fsp)
1856 {
1857         struct tevent_req *req, *subreq;
1858         struct smb_vfs_call_fsync_state *state;
1859
1860         req = tevent_req_create(mem_ctx, &state,
1861                                 struct smb_vfs_call_fsync_state);
1862         if (req == NULL) {
1863                 return NULL;
1864         }
1865         VFS_FIND(fsync_send);
1866         state->recv_fn = handle->fns->fsync_recv_fn;
1867
1868         subreq = handle->fns->fsync_send_fn(handle, state, ev, fsp);
1869         if (tevent_req_nomem(subreq, req)) {
1870                 return tevent_req_post(req, ev);
1871         }
1872         tevent_req_set_callback(subreq, smb_vfs_call_fsync_done, req);
1873         return req;
1874 }
1875
1876 static void smb_vfs_call_fsync_done(struct tevent_req *subreq)
1877 {
1878         struct tevent_req *req = tevent_req_callback_data(
1879                 subreq, struct tevent_req);
1880         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1881                 req, struct smb_vfs_call_fsync_state);
1882
1883         state->retval = state->recv_fn(subreq, &state->vfs_aio_state);
1884         TALLOC_FREE(subreq);
1885         if (state->retval == -1) {
1886                 tevent_req_error(req, state->vfs_aio_state.error);
1887                 return;
1888         }
1889         tevent_req_done(req);
1890 }
1891
1892 int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state)
1893 {
1894         struct smb_vfs_call_fsync_state *state = tevent_req_data(
1895                 req, struct smb_vfs_call_fsync_state);
1896
1897         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1898                 return -1;
1899         }
1900         *vfs_aio_state = state->vfs_aio_state;
1901         return state->retval;
1902 }
1903
1904
1905 int smb_vfs_call_stat(struct vfs_handle_struct *handle,
1906                       struct smb_filename *smb_fname)
1907 {
1908         VFS_FIND(stat);
1909         return handle->fns->stat_fn(handle, smb_fname);
1910 }
1911
1912 int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
1913                        struct files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1914 {
1915         VFS_FIND(fstat);
1916         return handle->fns->fstat_fn(handle, fsp, sbuf);
1917 }
1918
1919 int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
1920                        struct smb_filename *smb_filename)
1921 {
1922         VFS_FIND(lstat);
1923         return handle->fns->lstat_fn(handle, smb_filename);
1924 }
1925
1926 uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
1927                                      struct files_struct *fsp,
1928                                      const SMB_STRUCT_STAT *sbuf)
1929 {
1930         VFS_FIND(get_alloc_size);
1931         return handle->fns->get_alloc_size_fn(handle, fsp, sbuf);
1932 }
1933
1934 int smb_vfs_call_unlink(struct vfs_handle_struct *handle,
1935                         const struct smb_filename *smb_fname)
1936 {
1937         VFS_FIND(unlink);
1938         return handle->fns->unlink_fn(handle, smb_fname);
1939 }
1940
1941 int smb_vfs_call_chmod(struct vfs_handle_struct *handle,
1942                         const struct smb_filename *smb_fname,
1943                         mode_t mode)
1944 {
1945         VFS_FIND(chmod);
1946         return handle->fns->chmod_fn(handle, smb_fname, mode);
1947 }
1948
1949 int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
1950                         struct files_struct *fsp, mode_t mode)
1951 {
1952         VFS_FIND(fchmod);
1953         return handle->fns->fchmod_fn(handle, fsp, mode);
1954 }
1955
1956 int smb_vfs_call_chown(struct vfs_handle_struct *handle,
1957                         const struct smb_filename *smb_fname,
1958                         uid_t uid,
1959                         gid_t gid)
1960 {
1961         VFS_FIND(chown);
1962         return handle->fns->chown_fn(handle, smb_fname, uid, gid);
1963 }
1964
1965 int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
1966                         struct files_struct *fsp, uid_t uid, gid_t gid)
1967 {
1968         VFS_FIND(fchown);
1969         return handle->fns->fchown_fn(handle, fsp, uid, gid);
1970 }
1971
1972 int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
1973                         const struct smb_filename *smb_fname,
1974                         uid_t uid,
1975                         gid_t gid)
1976 {
1977         VFS_FIND(lchown);
1978         return handle->fns->lchown_fn(handle, smb_fname, uid, gid);
1979 }
1980
1981 NTSTATUS vfs_chown_fsp(files_struct *fsp, uid_t uid, gid_t gid)
1982 {
1983         int ret;
1984         bool as_root = false;
1985         NTSTATUS status;
1986
1987         if (fsp->fh->fd != -1) {
1988                 /* Try fchown. */
1989                 ret = SMB_VFS_FCHOWN(fsp, uid, gid);
1990                 if (ret == 0) {
1991                         return NT_STATUS_OK;
1992                 }
1993                 if (ret == -1 && errno != ENOSYS) {
1994                         return map_nt_error_from_unix(errno);
1995                 }
1996         }
1997
1998         as_root = (geteuid() == 0);
1999
2000         if (as_root) {
2001                 /*
2002                  * We are being asked to chown as root. Make
2003                  * sure we chdir() into the path to pin it,
2004                  * and always act using lchown to ensure we
2005                  * don't deref any symbolic links.
2006                  */
2007                 char *saved_dir = NULL;
2008                 char *parent_dir = NULL;
2009                 const char *final_component = NULL;
2010                 struct smb_filename *local_smb_fname = NULL;
2011
2012                 saved_dir = vfs_GetWd(talloc_tos(),fsp->conn);
2013                 if (!saved_dir) {
2014                         status = map_nt_error_from_unix(errno);
2015                         DEBUG(0,("vfs_chown_fsp: failed to get "
2016                                 "current working directory. Error was %s\n",
2017                                 strerror(errno)));
2018                         return status;
2019                 }
2020
2021                 if (!parent_dirname(talloc_tos(),
2022                                 fsp->fsp_name->base_name,
2023                                 &parent_dir,
2024                                 &final_component)) {
2025                         return NT_STATUS_NO_MEMORY;
2026                 }
2027
2028                 /* cd into the parent dir to pin it. */
2029                 ret = vfs_ChDir(fsp->conn, parent_dir);
2030                 if (ret == -1) {
2031                         return map_nt_error_from_unix(errno);
2032                 }
2033
2034                 local_smb_fname = synthetic_smb_fname(talloc_tos(),
2035                                         final_component,
2036                                         NULL,
2037                                         NULL,
2038                                         fsp->fsp_name->flags);
2039                 if (local_smb_fname == NULL) {
2040                         status = NT_STATUS_NO_MEMORY;
2041                         goto out;
2042                 }
2043
2044                 /* Must use lstat here. */
2045                 ret = SMB_VFS_LSTAT(fsp->conn, local_smb_fname);
2046                 if (ret == -1) {
2047                         status = map_nt_error_from_unix(errno);
2048                         goto out;
2049                 }
2050
2051                 /* Ensure it matches the fsp stat. */
2052                 if (!check_same_stat(&local_smb_fname->st,
2053                                 &fsp->fsp_name->st)) {
2054                         status = NT_STATUS_ACCESS_DENIED;
2055                         goto out;
2056                 }
2057
2058                 ret = SMB_VFS_LCHOWN(fsp->conn,
2059                         local_smb_fname,
2060                         uid, gid);
2061
2062                 if (ret == 0) {
2063                         status = NT_STATUS_OK;
2064                 } else {
2065                         status = map_nt_error_from_unix(errno);
2066                 }
2067
2068   out:
2069
2070                 vfs_ChDir(fsp->conn,saved_dir);
2071                 TALLOC_FREE(local_smb_fname);
2072                 TALLOC_FREE(saved_dir);
2073                 TALLOC_FREE(parent_dir);
2074
2075                 return status;
2076         }
2077
2078         if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
2079                 ret = SMB_VFS_LCHOWN(fsp->conn,
2080                         fsp->fsp_name,
2081                         uid, gid);
2082         } else {
2083                 ret = SMB_VFS_CHOWN(fsp->conn,
2084                         fsp->fsp_name,
2085                         uid, gid);
2086         }
2087
2088         if (ret == 0) {
2089                 status = NT_STATUS_OK;
2090         } else {
2091                 status = map_nt_error_from_unix(errno);
2092         }
2093         return status;
2094 }
2095
2096 int smb_vfs_call_chdir(struct vfs_handle_struct *handle, const char *path)
2097 {
2098         VFS_FIND(chdir);
2099         return handle->fns->chdir_fn(handle, path);
2100 }
2101
2102 char *smb_vfs_call_getwd(struct vfs_handle_struct *handle)
2103 {
2104         VFS_FIND(getwd);
2105         return handle->fns->getwd_fn(handle);
2106 }
2107
2108 int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
2109                         const struct smb_filename *smb_fname,
2110                         struct smb_file_time *ft)
2111 {
2112         VFS_FIND(ntimes);
2113         return handle->fns->ntimes_fn(handle, smb_fname, ft);
2114 }
2115
2116 int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
2117                            struct files_struct *fsp, off_t offset)
2118 {
2119         VFS_FIND(ftruncate);
2120         return handle->fns->ftruncate_fn(handle, fsp, offset);
2121 }
2122
2123 int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
2124                            struct files_struct *fsp,
2125                            uint32_t mode,
2126                            off_t offset,
2127                            off_t len)
2128 {
2129         VFS_FIND(fallocate);
2130         return handle->fns->fallocate_fn(handle, fsp, mode, offset, len);
2131 }
2132
2133 int smb_vfs_call_kernel_flock(struct vfs_handle_struct *handle,
2134                               struct files_struct *fsp, uint32_t share_mode,
2135                               uint32_t access_mask)
2136 {
2137         VFS_FIND(kernel_flock);
2138         return handle->fns->kernel_flock_fn(handle, fsp, share_mode,
2139                                          access_mask);
2140 }
2141
2142 int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
2143                                 struct files_struct *fsp, int leasetype)
2144 {
2145         VFS_FIND(linux_setlease);
2146         return handle->fns->linux_setlease_fn(handle, fsp, leasetype);
2147 }
2148
2149 int smb_vfs_call_symlink(struct vfs_handle_struct *handle, const char *oldpath,
2150                          const char *newpath)
2151 {
2152         VFS_FIND(symlink);
2153         return handle->fns->symlink_fn(handle, oldpath, newpath);
2154 }
2155
2156 int smb_vfs_call_readlink(struct vfs_handle_struct *handle,
2157                               const char *path, char *buf, size_t bufsiz)
2158 {
2159         VFS_FIND(readlink);
2160         return handle->fns->readlink_fn(handle, path, buf, bufsiz);
2161 }
2162
2163 int smb_vfs_call_link(struct vfs_handle_struct *handle, const char *oldpath,
2164                       const char *newpath)
2165 {
2166         VFS_FIND(link);
2167         return handle->fns->link_fn(handle, oldpath, newpath);
2168 }
2169
2170 int smb_vfs_call_mknod(struct vfs_handle_struct *handle, const char *path,
2171                        mode_t mode, SMB_DEV_T dev)
2172 {
2173         VFS_FIND(mknod);
2174         return handle->fns->mknod_fn(handle, path, mode, dev);
2175 }
2176
2177 char *smb_vfs_call_realpath(struct vfs_handle_struct *handle, const char *path)
2178 {
2179         VFS_FIND(realpath);
2180         return handle->fns->realpath_fn(handle, path);
2181 }
2182
2183 int smb_vfs_call_chflags(struct vfs_handle_struct *handle, const char *path,
2184                          unsigned int flags)
2185 {
2186         VFS_FIND(chflags);
2187         return handle->fns->chflags_fn(handle, path, flags);
2188 }
2189
2190 struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
2191                                            const SMB_STRUCT_STAT *sbuf)
2192 {
2193         VFS_FIND(file_id_create);
2194         return handle->fns->file_id_create_fn(handle, sbuf);
2195 }
2196
2197 NTSTATUS smb_vfs_call_streaminfo(struct vfs_handle_struct *handle,
2198                                  struct files_struct *fsp,
2199                                  const struct smb_filename *smb_fname,
2200                                  TALLOC_CTX *mem_ctx,
2201                                  unsigned int *num_streams,
2202                                  struct stream_struct **streams)
2203 {
2204         VFS_FIND(streaminfo);
2205         return handle->fns->streaminfo_fn(handle, fsp, smb_fname, mem_ctx,
2206                                           num_streams, streams);
2207 }
2208
2209 int smb_vfs_call_get_real_filename(struct vfs_handle_struct *handle,
2210                                    const char *path, const char *name,
2211                                    TALLOC_CTX *mem_ctx, char **found_name)
2212 {
2213         VFS_FIND(get_real_filename);
2214         return handle->fns->get_real_filename_fn(handle, path, name, mem_ctx,
2215                                                  found_name);
2216 }
2217
2218 const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
2219                                      const char *filename)
2220 {
2221         VFS_FIND(connectpath);
2222         return handle->fns->connectpath_fn(handle, filename);
2223 }
2224
2225 bool smb_vfs_call_strict_lock(struct vfs_handle_struct *handle,
2226                               struct files_struct *fsp,
2227                               struct lock_struct *plock)
2228 {
2229         VFS_FIND(strict_lock);
2230         return handle->fns->strict_lock_fn(handle, fsp, plock);
2231 }
2232
2233 void smb_vfs_call_strict_unlock(struct vfs_handle_struct *handle,
2234                                 struct files_struct *fsp,
2235                                 struct lock_struct *plock)
2236 {
2237         VFS_FIND(strict_unlock);
2238         handle->fns->strict_unlock_fn(handle, fsp, plock);
2239 }
2240
2241 NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
2242                                      const char *name,
2243                                      enum vfs_translate_direction direction,
2244                                      TALLOC_CTX *mem_ctx,
2245                                      char **mapped_name)
2246 {
2247         VFS_FIND(translate_name);
2248         return handle->fns->translate_name_fn(handle, name, direction, mem_ctx,
2249                                               mapped_name);
2250 }
2251
2252 NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
2253                             struct files_struct *fsp,
2254                             TALLOC_CTX *ctx,
2255                             uint32_t function,
2256                             uint16_t req_flags,
2257                             const uint8_t *in_data,
2258                             uint32_t in_len,
2259                             uint8_t **out_data,
2260                             uint32_t max_out_len,
2261                             uint32_t *out_len)
2262 {
2263         VFS_FIND(fsctl);
2264         return handle->fns->fsctl_fn(handle, fsp, ctx, function, req_flags,
2265                                      in_data, in_len, out_data, max_out_len,
2266                                      out_len);
2267 }
2268
2269 NTSTATUS smb_vfs_call_get_dos_attributes(struct vfs_handle_struct *handle,
2270                                          struct smb_filename *smb_fname,
2271                                          uint32_t *dosmode)
2272 {
2273         VFS_FIND(get_dos_attributes);
2274         return handle->fns->get_dos_attributes_fn(handle, smb_fname, dosmode);
2275 }
2276
2277 NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
2278                                           struct files_struct *fsp,
2279                                           uint32_t *dosmode)
2280 {
2281         VFS_FIND(fget_dos_attributes);
2282         return handle->fns->fget_dos_attributes_fn(handle, fsp, dosmode);
2283 }
2284
2285 NTSTATUS smb_vfs_call_set_dos_attributes(struct vfs_handle_struct *handle,
2286                                          const struct smb_filename *smb_fname,
2287                                          uint32_t dosmode)
2288 {
2289         VFS_FIND(set_dos_attributes);
2290         return handle->fns->set_dos_attributes_fn(handle, smb_fname, dosmode);
2291 }
2292
2293 NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
2294                                           struct files_struct *fsp,
2295                                           uint32_t dosmode)
2296 {
2297         VFS_FIND(set_dos_attributes);
2298         return handle->fns->fset_dos_attributes_fn(handle, fsp, dosmode);
2299 }
2300
2301 struct tevent_req *smb_vfs_call_copy_chunk_send(struct vfs_handle_struct *handle,
2302                                                 TALLOC_CTX *mem_ctx,
2303                                                 struct tevent_context *ev,
2304                                                 struct files_struct *src_fsp,
2305                                                 off_t src_off,
2306                                                 struct files_struct *dest_fsp,
2307                                                 off_t dest_off,
2308                                                 off_t num,
2309                                                 uint32_t flags)
2310 {
2311         VFS_FIND(copy_chunk_send);
2312         return handle->fns->copy_chunk_send_fn(handle, mem_ctx, ev, src_fsp,
2313                                                src_off, dest_fsp, dest_off, num,
2314                                                flags);
2315 }
2316
2317 NTSTATUS smb_vfs_call_copy_chunk_recv(struct vfs_handle_struct *handle,
2318                                       struct tevent_req *req,
2319                                       off_t *copied)
2320 {
2321         VFS_FIND(copy_chunk_recv);
2322         return handle->fns->copy_chunk_recv_fn(handle, req, copied);
2323 }
2324
2325 NTSTATUS smb_vfs_call_get_compression(vfs_handle_struct *handle,
2326                                       TALLOC_CTX *mem_ctx,
2327                                       struct files_struct *fsp,
2328                                       struct smb_filename *smb_fname,
2329                                       uint16_t *_compression_fmt)
2330 {
2331         VFS_FIND(get_compression);
2332         return handle->fns->get_compression_fn(handle, mem_ctx, fsp, smb_fname,
2333                                                _compression_fmt);
2334 }
2335
2336 NTSTATUS smb_vfs_call_set_compression(vfs_handle_struct *handle,
2337                                       TALLOC_CTX *mem_ctx,
2338                                       struct files_struct *fsp,
2339                                       uint16_t compression_fmt)
2340 {
2341         VFS_FIND(set_compression);
2342         return handle->fns->set_compression_fn(handle, mem_ctx, fsp,
2343                                                compression_fmt);
2344 }
2345
2346 NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
2347                                       TALLOC_CTX *mem_ctx,
2348                                       const char *service_path,
2349                                       char **base_volume)
2350 {
2351         VFS_FIND(snap_check_path);
2352         return handle->fns->snap_check_path_fn(handle, mem_ctx, service_path,
2353                                                base_volume);
2354 }
2355
2356 NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle,
2357                                   TALLOC_CTX *mem_ctx,
2358                                   const char *base_volume,
2359                                   time_t *tstamp,
2360                                   bool rw,
2361                                   char **base_path,
2362                                   char **snap_path)
2363 {
2364         VFS_FIND(snap_create);
2365         return handle->fns->snap_create_fn(handle, mem_ctx, base_volume, tstamp,
2366                                            rw, base_path, snap_path);
2367 }
2368
2369 NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
2370                                   TALLOC_CTX *mem_ctx,
2371                                   char *base_path,
2372                                   char *snap_path)
2373 {
2374         VFS_FIND(snap_delete);
2375         return handle->fns->snap_delete_fn(handle, mem_ctx, base_path,
2376                                            snap_path);
2377 }
2378
2379 NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
2380                                   struct files_struct *fsp,
2381                                   uint32_t security_info,
2382                                   TALLOC_CTX *mem_ctx,
2383                                   struct security_descriptor **ppdesc)
2384 {
2385         VFS_FIND(fget_nt_acl);
2386         return handle->fns->fget_nt_acl_fn(handle, fsp, security_info,
2387                                            mem_ctx, ppdesc);
2388 }
2389
2390 NTSTATUS smb_vfs_call_get_nt_acl(struct vfs_handle_struct *handle,
2391                                  const struct smb_filename *smb_fname,
2392                                  uint32_t security_info,
2393                                  TALLOC_CTX *mem_ctx,
2394                                  struct security_descriptor **ppdesc)
2395 {
2396         VFS_FIND(get_nt_acl);
2397         return handle->fns->get_nt_acl_fn(handle,
2398                                 smb_fname,
2399                                 security_info,
2400                                 mem_ctx,
2401                                 ppdesc);
2402 }
2403
2404 NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
2405                                   struct files_struct *fsp,
2406                                   uint32_t security_info_sent,
2407                                   const struct security_descriptor *psd)
2408 {
2409         VFS_FIND(fset_nt_acl);
2410         return handle->fns->fset_nt_acl_fn(handle, fsp, security_info_sent, 
2411                                            psd);
2412 }
2413
2414 NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
2415                                  struct smb_filename *file,
2416                                  struct security_acl *sacl,
2417                                  uint32_t access_requested,
2418                                  uint32_t access_denied)
2419 {
2420         VFS_FIND(audit_file);
2421         return handle->fns->audit_file_fn(handle, 
2422                                           file, 
2423                                           sacl, 
2424                                           access_requested, 
2425                                           access_denied);
2426 }
2427
2428 int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle,
2429                 const struct smb_filename *smb_fname,
2430                 mode_t mode)
2431 {
2432         VFS_FIND(chmod_acl);
2433         return handle->fns->chmod_acl_fn(handle, smb_fname, mode);
2434 }
2435
2436 int smb_vfs_call_fchmod_acl(struct vfs_handle_struct *handle,
2437                             struct files_struct *fsp, mode_t mode)
2438 {
2439         VFS_FIND(fchmod_acl);
2440         return handle->fns->fchmod_acl_fn(handle, fsp, mode);
2441 }
2442
2443 SMB_ACL_T smb_vfs_call_sys_acl_get_file(struct vfs_handle_struct *handle,
2444                                         const struct smb_filename *smb_fname,
2445                                         SMB_ACL_TYPE_T type,
2446                                         TALLOC_CTX *mem_ctx)
2447 {
2448         VFS_FIND(sys_acl_get_file);
2449         return handle->fns->sys_acl_get_file_fn(handle, smb_fname, type, mem_ctx);
2450 }
2451
2452 SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
2453                                       struct files_struct *fsp,
2454                                       TALLOC_CTX *mem_ctx)
2455 {
2456         VFS_FIND(sys_acl_get_fd);
2457         return handle->fns->sys_acl_get_fd_fn(handle, fsp, mem_ctx);
2458 }
2459
2460 int smb_vfs_call_sys_acl_blob_get_file(struct vfs_handle_struct *handle,
2461                                        const char *path_p,
2462                                        TALLOC_CTX *mem_ctx, 
2463                                        char **blob_description,
2464                                        DATA_BLOB *blob)
2465 {
2466         VFS_FIND(sys_acl_blob_get_file);
2467         return handle->fns->sys_acl_blob_get_file_fn(handle, path_p, mem_ctx, blob_description, blob);
2468 }
2469
2470 int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
2471                                      struct files_struct *fsp,
2472                                      TALLOC_CTX *mem_ctx, 
2473                                      char **blob_description,
2474                                      DATA_BLOB *blob)
2475 {
2476         VFS_FIND(sys_acl_blob_get_fd);
2477         return handle->fns->sys_acl_blob_get_fd_fn(handle, fsp, mem_ctx, blob_description, blob);
2478 }
2479
2480 int smb_vfs_call_sys_acl_set_file(struct vfs_handle_struct *handle,
2481                                   const char *name, SMB_ACL_TYPE_T acltype,
2482                                   SMB_ACL_T theacl)
2483 {
2484         VFS_FIND(sys_acl_set_file);
2485         return handle->fns->sys_acl_set_file_fn(handle, name, acltype, theacl);
2486 }
2487
2488 int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
2489                                 struct files_struct *fsp, SMB_ACL_T theacl)
2490 {
2491         VFS_FIND(sys_acl_set_fd);
2492         return handle->fns->sys_acl_set_fd_fn(handle, fsp, theacl);
2493 }
2494
2495 int smb_vfs_call_sys_acl_delete_def_file(struct vfs_handle_struct *handle,
2496                                 const struct smb_filename *smb_fname)
2497 {
2498         VFS_FIND(sys_acl_delete_def_file);
2499         return handle->fns->sys_acl_delete_def_file_fn(handle, smb_fname);
2500 }
2501
2502 ssize_t smb_vfs_call_getxattr(struct vfs_handle_struct *handle,
2503                               const char *path, const char *name, void *value,
2504                               size_t size)
2505 {
2506         VFS_FIND(getxattr);
2507         return handle->fns->getxattr_fn(handle, path, name, value, size);
2508 }
2509
2510 ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
2511                                struct files_struct *fsp, const char *name,
2512                                void *value, size_t size)
2513 {
2514         VFS_FIND(fgetxattr);
2515         return handle->fns->fgetxattr_fn(handle, fsp, name, value, size);
2516 }
2517
2518 ssize_t smb_vfs_call_listxattr(struct vfs_handle_struct *handle,
2519                                const char *path, char *list, size_t size)
2520 {
2521         VFS_FIND(listxattr);
2522         return handle->fns->listxattr_fn(handle, path, list, size);
2523 }
2524
2525 ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
2526                                 struct files_struct *fsp, char *list,
2527                                 size_t size)
2528 {
2529         VFS_FIND(flistxattr);
2530         return handle->fns->flistxattr_fn(handle, fsp, list, size);
2531 }
2532
2533 int smb_vfs_call_removexattr(struct vfs_handle_struct *handle,
2534                              const char *path, const char *name)
2535 {
2536         VFS_FIND(removexattr);
2537         return handle->fns->removexattr_fn(handle, path, name);
2538 }
2539
2540 int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
2541                               struct files_struct *fsp, const char *name)
2542 {
2543         VFS_FIND(fremovexattr);
2544         return handle->fns->fremovexattr_fn(handle, fsp, name);
2545 }
2546
2547 int smb_vfs_call_setxattr(struct vfs_handle_struct *handle, const char *path,
2548                           const char *name, const void *value, size_t size,
2549                           int flags)
2550 {
2551         VFS_FIND(setxattr);
2552         return handle->fns->setxattr_fn(handle, path, name, value, size, flags);
2553 }
2554
2555 int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
2556                            struct files_struct *fsp, const char *name,
2557                            const void *value, size_t size, int flags)
2558 {
2559         VFS_FIND(fsetxattr);
2560         return handle->fns->fsetxattr_fn(handle, fsp, name, value, size, flags);
2561 }
2562
2563 bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
2564                             struct files_struct *fsp)
2565 {
2566         VFS_FIND(aio_force);
2567         return handle->fns->aio_force_fn(handle, fsp);
2568 }
2569
2570 NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
2571                                      struct files_struct *fsp,
2572                                      TALLOC_CTX *mem_ctx,
2573                                      DATA_BLOB *cookie)
2574 {
2575         VFS_FIND(durable_cookie);
2576         return handle->fns->durable_cookie_fn(handle, fsp, mem_ctx, cookie);
2577 }
2578
2579 NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
2580                                          struct files_struct *fsp,
2581                                          const DATA_BLOB old_cookie,
2582                                          TALLOC_CTX *mem_ctx,
2583                                          DATA_BLOB *new_cookie)
2584 {
2585         VFS_FIND(durable_disconnect);
2586         return handle->fns->durable_disconnect_fn(handle, fsp, old_cookie,
2587                                                   mem_ctx, new_cookie);
2588 }
2589
2590 NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle,
2591                                         struct smb_request *smb1req,
2592                                         struct smbXsrv_open *op,
2593                                         const DATA_BLOB old_cookie,
2594                                         TALLOC_CTX *mem_ctx,
2595                                         struct files_struct **fsp,
2596                                         DATA_BLOB *new_cookie)
2597 {
2598         VFS_FIND(durable_reconnect);
2599         return handle->fns->durable_reconnect_fn(handle, smb1req, op,
2600                                                  old_cookie, mem_ctx, fsp,
2601                                                  new_cookie);
2602 }
2603
2604 NTSTATUS smb_vfs_call_readdir_attr(struct vfs_handle_struct *handle,
2605                                    const struct smb_filename *fname,
2606                                    TALLOC_CTX *mem_ctx,
2607                                    struct readdir_attr_data **attr_data)
2608 {
2609         VFS_FIND(readdir_attr);
2610         return handle->fns->readdir_attr_fn(handle, fname, mem_ctx, attr_data);
2611 }