samba-bgqd: Fix samba-bgqd with "clustering=yes"/"include=registry"
[samba.git] / source3 / modules / vfs_default.c
1 /*
2    Unix SMB/CIFS implementation.
3    Wrap disk only vfs functions to sidestep dodgy compilers.
4    Copyright (C) Tim Potter 1998
5    Copyright (C) Jeremy Allison 2007
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 3 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    You should have received a copy of the GNU General Public License
18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/time.h"
23 #include "system/filesys.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "ntioctl.h"
27 #include "smbprofile.h"
28 #include "../libcli/security/security.h"
29 #include "passdb/lookup_sid.h"
30 #include "source3/include/msdfs.h"
31 #include "librpc/gen_ndr/ndr_dfsblobs.h"
32 #include "lib/util/tevent_unix.h"
33 #include "lib/util/tevent_ntstatus.h"
34 #include "lib/util/sys_rw.h"
35 #include "lib/pthreadpool/pthreadpool_tevent.h"
36 #include "librpc/gen_ndr/ndr_ioctl.h"
37 #include "offload_token.h"
38 #include "util_reparse.h"
39 #include "lib/util/string_wrappers.h"
40
41 #undef DBGC_CLASS
42 #define DBGC_CLASS DBGC_VFS
43
44 /* Check for NULL pointer parameters in vfswrap_* functions */
45
46 /* We don't want to have NULL function pointers lying around.  Someone
47    is sure to try and execute them.  These stubs are used to prevent
48    this possibility. */
49
50 static int vfswrap_connect(vfs_handle_struct *handle, const char *service, const char *user)
51 {
52         handle->conn->have_proc_fds = sys_have_proc_fds();
53         return 0;    /* Return >= 0 for success */
54 }
55
56 static void vfswrap_disconnect(vfs_handle_struct *handle)
57 {
58 }
59
60 /* Disk operations */
61
62 static uint64_t vfswrap_disk_free(vfs_handle_struct *handle,
63                                 const struct smb_filename *smb_fname,
64                                 uint64_t *bsize,
65                                 uint64_t *dfree,
66                                 uint64_t *dsize)
67 {
68         if (sys_fsusage(smb_fname->base_name, dfree, dsize) != 0) {
69                 return (uint64_t)-1;
70         }
71
72         *bsize = 512;
73         return *dfree / 2;
74 }
75
76 static int vfswrap_get_quota(struct vfs_handle_struct *handle,
77                                 const struct smb_filename *smb_fname,
78                                 enum SMB_QUOTA_TYPE qtype,
79                                 unid_t id,
80                                 SMB_DISK_QUOTA *qt)
81 {
82 #ifdef HAVE_SYS_QUOTAS
83         int result;
84
85         START_PROFILE(syscall_get_quota);
86         result = sys_get_quota(smb_fname->base_name, qtype, id, qt);
87         END_PROFILE(syscall_get_quota);
88         return result;
89 #else
90         errno = ENOSYS;
91         return -1;
92 #endif
93 }
94
95 static int vfswrap_set_quota(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt)
96 {
97 #ifdef HAVE_SYS_QUOTAS
98         int result;
99
100         START_PROFILE(syscall_set_quota);
101         result = sys_set_quota(handle->conn->connectpath, qtype, id, qt);
102         END_PROFILE(syscall_set_quota);
103         return result;
104 #else
105         errno = ENOSYS;
106         return -1;
107 #endif
108 }
109
110 static int vfswrap_get_shadow_copy_data(struct vfs_handle_struct *handle,
111                                         struct files_struct *fsp,
112                                         struct shadow_copy_data *shadow_copy_data,
113                                         bool labels)
114 {
115         errno = ENOSYS;
116         return -1;  /* Not implemented. */
117 }
118
119 static int vfswrap_statvfs(struct vfs_handle_struct *handle,
120                                 const struct smb_filename *smb_fname,
121                                 vfs_statvfs_struct *statbuf)
122 {
123         return sys_statvfs(smb_fname->base_name, statbuf);
124 }
125
126 static uint32_t vfswrap_fs_capabilities(struct vfs_handle_struct *handle,
127                 enum timestamp_set_resolution *p_ts_res)
128 {
129         const struct loadparm_substitution *lp_sub =
130                 loadparm_s3_global_substitution();
131         connection_struct *conn = handle->conn;
132         uint32_t caps = FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
133         struct smb_filename *smb_fname_cpath = NULL;
134         struct vfs_statvfs_struct statbuf;
135         int ret;
136
137         smb_fname_cpath = synthetic_smb_fname(talloc_tos(),
138                                               conn->connectpath,
139                                               NULL,
140                                               NULL,
141                                               0,
142                                               0);
143         if (smb_fname_cpath == NULL) {
144                 return caps;
145         }
146
147         ZERO_STRUCT(statbuf);
148         ret = SMB_VFS_STATVFS(conn, smb_fname_cpath, &statbuf);
149         if (ret == 0) {
150                 caps = statbuf.FsCapabilities;
151         }
152
153         *p_ts_res = TIMESTAMP_SET_SECONDS;
154
155         /* Work out what timestamp resolution we can
156          * use when setting a timestamp. */
157
158         ret = SMB_VFS_STAT(conn, smb_fname_cpath);
159         if (ret == -1) {
160                 TALLOC_FREE(smb_fname_cpath);
161                 return caps;
162         }
163
164         if (smb_fname_cpath->st.st_ex_mtime.tv_nsec ||
165                         smb_fname_cpath->st.st_ex_atime.tv_nsec ||
166                         smb_fname_cpath->st.st_ex_ctime.tv_nsec) {
167                 /* If any of the normal UNIX directory timestamps
168                  * have a non-zero tv_nsec component assume
169                  * we might be able to set sub-second timestamps.
170                  * See what filetime set primitives we have.
171                  */
172 #if defined(HAVE_UTIMENSAT)
173                 *p_ts_res = TIMESTAMP_SET_NT_OR_BETTER;
174 #elif defined(HAVE_UTIMES)
175                 /* utimes allows msec timestamps to be set. */
176                 *p_ts_res = TIMESTAMP_SET_MSEC;
177 #elif defined(HAVE_UTIME)
178                 /* utime only allows sec timestamps to be set. */
179                 *p_ts_res = TIMESTAMP_SET_SECONDS;
180 #endif
181
182                 DEBUG(10,("vfswrap_fs_capabilities: timestamp "
183                         "resolution of %s "
184                         "available on share %s, directory %s\n",
185                         *p_ts_res == TIMESTAMP_SET_MSEC ? "msec" : "sec",
186                         lp_servicename(talloc_tos(), lp_sub, conn->params->service),
187                         conn->connectpath ));
188         }
189         TALLOC_FREE(smb_fname_cpath);
190         return caps;
191 }
192
193 static NTSTATUS vfswrap_get_dfs_referrals(struct vfs_handle_struct *handle,
194                                           struct dfs_GetDFSReferral *r)
195 {
196         struct junction_map *junction = NULL;
197         int consumedcnt = 0;
198         bool self_referral = false;
199         char *pathnamep = NULL;
200         char *local_dfs_path = NULL;
201         NTSTATUS status;
202         size_t i;
203         uint16_t max_referral_level = r->in.req.max_referral_level;
204
205         if (DEBUGLVL(10)) {
206                 NDR_PRINT_IN_DEBUG(dfs_GetDFSReferral, r);
207         }
208
209         /* get the junction entry */
210         if (r->in.req.servername == NULL) {
211                 return NT_STATUS_NOT_FOUND;
212         }
213
214         /*
215          * Trim pathname sent by client so it begins with only one backslash.
216          * Two backslashes confuse some dfs clients
217          */
218
219         local_dfs_path = talloc_strdup(r, r->in.req.servername);
220         if (local_dfs_path == NULL) {
221                 return NT_STATUS_NO_MEMORY;
222         }
223         pathnamep = local_dfs_path;
224         while (IS_DIRECTORY_SEP(pathnamep[0]) &&
225                IS_DIRECTORY_SEP(pathnamep[1])) {
226                 pathnamep++;
227         }
228
229         junction = talloc_zero(r, struct junction_map);
230         if (junction == NULL) {
231                 return NT_STATUS_NO_MEMORY;
232         }
233
234         /* The following call can change cwd. */
235         status = get_referred_path(r,
236                                    handle->conn->session_info,
237                                    pathnamep,
238                                    handle->conn->sconn->remote_address,
239                                    handle->conn->sconn->local_address,
240                                    !handle->conn->sconn->using_smb2,
241                                    junction, &consumedcnt, &self_referral);
242         if (!NT_STATUS_IS_OK(status)) {
243                 struct smb_filename connectpath_fname = {
244                         .base_name = handle->conn->connectpath
245                 };
246                 vfs_ChDir(handle->conn, &connectpath_fname);
247                 return status;
248         }
249         {
250                 struct smb_filename connectpath_fname = {
251                         .base_name = handle->conn->connectpath
252                 };
253                 vfs_ChDir(handle->conn, &connectpath_fname);
254         }
255
256         if (!self_referral) {
257                 pathnamep[consumedcnt] = '\0';
258
259                 if (DEBUGLVL(3)) {
260                         dbgtext("Path %s to alternate path(s):",
261                                 pathnamep);
262                         for (i=0; i < junction->referral_count; i++) {
263                                 dbgtext(" %s",
264                                 junction->referral_list[i].alternate_path);
265                         }
266                         dbgtext(".\n");
267                 }
268         }
269
270         if (r->in.req.max_referral_level <= 2) {
271                 max_referral_level = 2;
272         }
273         if (r->in.req.max_referral_level >= 3) {
274                 max_referral_level = 3;
275         }
276
277         r->out.resp = talloc_zero(r, struct dfs_referral_resp);
278         if (r->out.resp == NULL) {
279                 return NT_STATUS_NO_MEMORY;
280         }
281
282         r->out.resp->path_consumed = strlen_m(pathnamep) * 2;
283         r->out.resp->nb_referrals = junction->referral_count;
284
285         r->out.resp->header_flags = DFS_HEADER_FLAG_STORAGE_SVR;
286         if (self_referral) {
287                 r->out.resp->header_flags |= DFS_HEADER_FLAG_REFERAL_SVR;
288         }
289
290         r->out.resp->referral_entries = talloc_zero_array(r,
291                                 struct dfs_referral_type,
292                                 r->out.resp->nb_referrals);
293         if (r->out.resp->referral_entries == NULL) {
294                 return NT_STATUS_NO_MEMORY;
295         }
296
297         switch (max_referral_level) {
298         case 2:
299                 for(i=0; i < junction->referral_count; i++) {
300                         struct referral *ref = &junction->referral_list[i];
301                         TALLOC_CTX *mem_ctx = r->out.resp->referral_entries;
302                         struct dfs_referral_type *t =
303                                 &r->out.resp->referral_entries[i];
304                         struct dfs_referral_v2 *v2 = &t->referral.v2;
305
306                         t->version = 2;
307                         v2->size = VERSION2_REFERRAL_SIZE;
308                         if (self_referral) {
309                                 v2->server_type = DFS_SERVER_ROOT;
310                         } else {
311                                 v2->server_type = DFS_SERVER_NON_ROOT;
312                         }
313                         v2->entry_flags = 0;
314                         v2->proximity = ref->proximity;
315                         v2->ttl = ref->ttl;
316                         v2->DFS_path = talloc_strdup(mem_ctx, pathnamep);
317                         if (v2->DFS_path == NULL) {
318                                 return NT_STATUS_NO_MEMORY;
319                         }
320                         v2->DFS_alt_path = talloc_strdup(mem_ctx, pathnamep);
321                         if (v2->DFS_alt_path == NULL) {
322                                 return NT_STATUS_NO_MEMORY;
323                         }
324                         v2->netw_address = talloc_strdup(mem_ctx,
325                                                          ref->alternate_path);
326                         if (v2->netw_address == NULL) {
327                                 return NT_STATUS_NO_MEMORY;
328                         }
329                 }
330
331                 break;
332         case 3:
333                 for(i=0; i < junction->referral_count; i++) {
334                         struct referral *ref = &junction->referral_list[i];
335                         TALLOC_CTX *mem_ctx = r->out.resp->referral_entries;
336                         struct dfs_referral_type *t =
337                                 &r->out.resp->referral_entries[i];
338                         struct dfs_referral_v3 *v3 = &t->referral.v3;
339                         struct dfs_normal_referral *r1 = &v3->referrals.r1;
340
341                         t->version = 3;
342                         v3->size = VERSION3_REFERRAL_SIZE;
343                         if (self_referral) {
344                                 v3->server_type = DFS_SERVER_ROOT;
345                         } else {
346                                 v3->server_type = DFS_SERVER_NON_ROOT;
347                         }
348                         v3->entry_flags = 0;
349                         v3->ttl = ref->ttl;
350                         r1->DFS_path = talloc_strdup(mem_ctx, pathnamep);
351                         if (r1->DFS_path == NULL) {
352                                 return NT_STATUS_NO_MEMORY;
353                         }
354                         r1->DFS_alt_path = talloc_strdup(mem_ctx, pathnamep);
355                         if (r1->DFS_alt_path == NULL) {
356                                 return NT_STATUS_NO_MEMORY;
357                         }
358                         r1->netw_address = talloc_strdup(mem_ctx,
359                                                          ref->alternate_path);
360                         if (r1->netw_address == NULL) {
361                                 return NT_STATUS_NO_MEMORY;
362                         }
363                 }
364                 break;
365         default:
366                 DEBUG(0,("Invalid dfs referral version: %d\n",
367                         max_referral_level));
368                 return NT_STATUS_INVALID_LEVEL;
369         }
370
371         if (DEBUGLVL(10)) {
372                 NDR_PRINT_OUT_DEBUG(dfs_GetDFSReferral, r);
373         }
374
375         return NT_STATUS_OK;
376 }
377
378 static NTSTATUS vfswrap_create_dfs_pathat(struct vfs_handle_struct *handle,
379                                 struct files_struct *dirfsp,
380                                 const struct smb_filename *smb_fname,
381                                 const struct referral *reflist,
382                                 size_t referral_count)
383 {
384         TALLOC_CTX *frame = talloc_stackframe();
385         NTSTATUS status = NT_STATUS_NO_MEMORY;
386         int ret;
387         char *msdfs_link = NULL;
388
389         /* Form the msdfs_link contents */
390         msdfs_link = msdfs_link_string(frame,
391                                         reflist,
392                                         referral_count);
393         if (msdfs_link == NULL) {
394                 goto out;
395         }
396
397         ret = symlinkat(msdfs_link,
398                         fsp_get_pathref_fd(dirfsp),
399                         smb_fname->base_name);
400         if (ret == 0) {
401                 status = NT_STATUS_OK;
402         } else {
403                 status = map_nt_error_from_unix(errno);
404         }
405
406   out:
407
408         TALLOC_FREE(frame);
409         return status;
410 }
411
412 /*
413  * Read and return the contents of a DFS redirect given a
414  * pathname. A caller can pass in NULL for ppreflist and
415  * preferral_count but still determine if this was a
416  * DFS redirect point by getting NT_STATUS_OK back
417  * without incurring the overhead of reading and parsing
418  * the referral contents.
419  */
420
421 static NTSTATUS vfswrap_read_dfs_pathat(struct vfs_handle_struct *handle,
422                                 TALLOC_CTX *mem_ctx,
423                                 struct files_struct *dirfsp,
424                                 struct smb_filename *smb_fname,
425                                 struct referral **ppreflist,
426                                 size_t *preferral_count)
427 {
428         NTSTATUS status = NT_STATUS_NO_MEMORY;
429         size_t bufsize;
430         char *link_target = NULL;
431         int referral_len;
432         bool ok;
433 #if defined(HAVE_BROKEN_READLINK)
434         char link_target_buf[PATH_MAX];
435 #else
436         char link_target_buf[7];
437 #endif
438         int ret;
439
440         SMB_ASSERT(dirfsp == dirfsp->conn->cwd_fsp);
441
442         if (is_named_stream(smb_fname)) {
443                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
444                 goto err;
445         }
446
447         if (ppreflist == NULL && preferral_count == NULL) {
448                 /*
449                  * We're only checking if this is a DFS
450                  * redirect. We don't need to return data.
451                  */
452                 bufsize = sizeof(link_target_buf);
453                 link_target = link_target_buf;
454         } else {
455                 bufsize = PATH_MAX;
456                 link_target = talloc_array(mem_ctx, char, bufsize);
457                 if (!link_target) {
458                         goto err;
459                 }
460         }
461
462         referral_len = readlinkat(fsp_get_io_fd(dirfsp),
463                                 smb_fname->base_name,
464                                 link_target,
465                                 bufsize - 1);
466         if (referral_len == -1) {
467                 if (errno == EINVAL) {
468                         /*
469                          * If the path isn't a link, readlinkat
470                          * returns EINVAL. Allow the caller to
471                          * detect this.
472                          */
473                         DBG_INFO("%s is not a link.\n", smb_fname->base_name);
474                         status = NT_STATUS_OBJECT_TYPE_MISMATCH;
475                 } else {
476                         status = map_nt_error_from_unix(errno);
477                         if (errno == ENOENT) {
478                                 DBG_NOTICE("Error reading "
479                                          "msdfs link %s: %s\n",
480                                          smb_fname->base_name,
481                                          strerror(errno));
482                         } else {
483                                 DBG_ERR("Error reading "
484                                         "msdfs link %s: %s\n",
485                                         smb_fname->base_name,
486                                         strerror(errno));
487                         }
488                 }
489                 goto err;
490         }
491         link_target[referral_len] = '\0';
492
493         DBG_INFO("%s -> %s\n",
494                         smb_fname->base_name,
495                         link_target);
496
497         if (!strnequal(link_target, "msdfs:", 6)) {
498                 status = NT_STATUS_OBJECT_TYPE_MISMATCH;
499                 goto err;
500         }
501
502         ret = sys_lstat(smb_fname->base_name,
503                         &smb_fname->st,
504                         lp_fake_directory_create_times(SNUM(handle->conn)));
505         if (ret < 0) {
506                 status = map_nt_error_from_unix(errno);
507                 goto err;
508         }
509
510         if (ppreflist == NULL && preferral_count == NULL) {
511                 /* Early return for checking if this is a DFS link. */
512                 return NT_STATUS_OK;
513         }
514
515         ok = parse_msdfs_symlink(mem_ctx,
516                         lp_msdfs_shuffle_referrals(SNUM(handle->conn)),
517                         link_target,
518                         ppreflist,
519                         preferral_count);
520
521         if (ok) {
522                 status = NT_STATUS_OK;
523         } else {
524                 status = NT_STATUS_NO_MEMORY;
525         }
526
527   err:
528
529         if (link_target != link_target_buf) {
530                 TALLOC_FREE(link_target);
531         }
532         return status;
533 }
534
535 static NTSTATUS vfswrap_snap_check_path(struct vfs_handle_struct *handle,
536                                         TALLOC_CTX *mem_ctx,
537                                         const char *service_path,
538                                         char **base_volume)
539 {
540         return NT_STATUS_NOT_SUPPORTED;
541 }
542
543 static NTSTATUS vfswrap_snap_create(struct vfs_handle_struct *handle,
544                                     TALLOC_CTX *mem_ctx,
545                                     const char *base_volume,
546                                     time_t *tstamp,
547                                     bool rw,
548                                     char **base_path,
549                                     char **snap_path)
550 {
551         return NT_STATUS_NOT_SUPPORTED;
552 }
553
554 static NTSTATUS vfswrap_snap_delete(struct vfs_handle_struct *handle,
555                                     TALLOC_CTX *mem_ctx,
556                                     char *base_path,
557                                     char *snap_path)
558 {
559         return NT_STATUS_NOT_SUPPORTED;
560 }
561
562 /* Directory operations */
563
564 static DIR *vfswrap_fdopendir(vfs_handle_struct *handle,
565                         files_struct *fsp,
566                         const char *mask,
567                         uint32_t attr)
568 {
569         DIR *result;
570
571         START_PROFILE(syscall_fdopendir);
572         result = sys_fdopendir(fsp_get_io_fd(fsp));
573         END_PROFILE(syscall_fdopendir);
574         return result;
575 }
576
577
578 static struct dirent *vfswrap_readdir(vfs_handle_struct *handle,
579                                       struct files_struct *dirfsp,
580                                       DIR *dirp,
581                                       SMB_STRUCT_STAT *sbuf)
582 {
583         struct dirent *result;
584         bool do_stat = false;
585         bool fake_ctime = lp_fake_directory_create_times(SNUM(handle->conn));
586         int flags = AT_SYMLINK_NOFOLLOW;
587         struct stat st;
588         int ret;
589
590         START_PROFILE(syscall_readdir);
591
592 #if defined(HAVE_DIRFD) && defined(HAVE_FSTATAT)
593         do_stat = true;
594 #endif
595
596         result = readdir(dirp);
597         END_PROFILE(syscall_readdir);
598
599         if (sbuf == NULL) {
600                 return result;
601         }
602         if (result == NULL) {
603                 return NULL;
604         }
605
606         /*
607          * Default Posix readdir() does not give us stat info.
608          * Set to invalid to indicate we didn't return this info.
609          */
610         SET_STAT_INVALID(*sbuf);
611
612         /* See if we can efficiently return this. */
613         if (!do_stat) {
614                 return result;
615         }
616
617         ret = fstatat(dirfd(dirp),
618                       result->d_name,
619                       &st,
620                       flags);
621         if (ret != 0) {
622                 return result;
623         }
624
625         /*
626          * As this is an optimization, ignore it if we stat'ed a
627          * symlink for non-POSIX context. Make the caller do it again
628          * as we don't know if they wanted the link info, or its
629          * target info.
630          */
631         if (S_ISLNK(st.st_mode) &&
632             !(dirfsp->fsp_name->flags & SMB_FILENAME_POSIX_PATH))
633         {
634                 return result;
635         }
636         init_stat_ex_from_stat(sbuf, &st, fake_ctime);
637
638         return result;
639 }
640
641 static NTSTATUS vfswrap_freaddir_attr(struct vfs_handle_struct *handle,
642                                       struct files_struct *fsp,
643                                       TALLOC_CTX *mem_ctx,
644                                       struct readdir_attr_data **attr_data)
645 {
646         return NT_STATUS_NOT_SUPPORTED;
647 }
648
649 static void vfswrap_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset)
650 {
651         START_PROFILE(syscall_seekdir);
652         seekdir(dirp, offset);
653         END_PROFILE(syscall_seekdir);
654 }
655
656 static long vfswrap_telldir(vfs_handle_struct *handle, DIR *dirp)
657 {
658         long result;
659         START_PROFILE(syscall_telldir);
660         result = telldir(dirp);
661         END_PROFILE(syscall_telldir);
662         return result;
663 }
664
665 static void vfswrap_rewinddir(vfs_handle_struct *handle, DIR *dirp)
666 {
667         START_PROFILE(syscall_rewinddir);
668         rewinddir(dirp);
669         END_PROFILE(syscall_rewinddir);
670 }
671
672 static int vfswrap_mkdirat(vfs_handle_struct *handle,
673                         struct files_struct *dirfsp,
674                         const struct smb_filename *smb_fname,
675                         mode_t mode)
676 {
677         int result;
678
679         START_PROFILE(syscall_mkdirat);
680
681         result = mkdirat(fsp_get_pathref_fd(dirfsp), smb_fname->base_name, mode);
682
683         END_PROFILE(syscall_mkdirat);
684         return result;
685 }
686
687 static int vfswrap_closedir(vfs_handle_struct *handle, DIR *dirp)
688 {
689         int result;
690
691         START_PROFILE(syscall_closedir);
692         result = closedir(dirp);
693         END_PROFILE(syscall_closedir);
694         return result;
695 }
696
697 /* File operations */
698
699 static int vfswrap_openat(vfs_handle_struct *handle,
700                           const struct files_struct *dirfsp,
701                           const struct smb_filename *smb_fname,
702                           files_struct *fsp,
703                           int flags,
704                           mode_t mode)
705 {
706         bool have_opath = false;
707         bool became_root = false;
708         int result;
709
710         START_PROFILE(syscall_openat);
711
712         if (is_named_stream(smb_fname)) {
713                 errno = ENOENT;
714                 result = -1;
715                 goto out;
716         }
717
718 #ifdef O_PATH
719         have_opath = true;
720         if (fsp->fsp_flags.is_pathref) {
721                 flags |= O_PATH;
722         }
723 #endif
724
725         if (fsp->fsp_flags.is_pathref && !have_opath) {
726                 become_root();
727                 became_root = true;
728         }
729
730         result = openat(fsp_get_pathref_fd(dirfsp),
731                         smb_fname->base_name,
732                         flags,
733                         mode);
734
735         if (became_root) {
736                 unbecome_root();
737         }
738
739         fsp->fsp_flags.have_proc_fds = fsp->conn->have_proc_fds;
740
741 out:
742         END_PROFILE(syscall_openat);
743         return result;
744 }
745 static NTSTATUS vfswrap_create_file(vfs_handle_struct *handle,
746                                     struct smb_request *req,
747                                     struct smb_filename *smb_fname,
748                                     uint32_t access_mask,
749                                     uint32_t share_access,
750                                     uint32_t create_disposition,
751                                     uint32_t create_options,
752                                     uint32_t file_attributes,
753                                     uint32_t oplock_request,
754                                     const struct smb2_lease *lease,
755                                     uint64_t allocation_size,
756                                     uint32_t private_flags,
757                                     struct security_descriptor *sd,
758                                     struct ea_list *ea_list,
759                                     files_struct **result,
760                                     int *pinfo,
761                                     const struct smb2_create_blobs *in_context_blobs,
762                                     struct smb2_create_blobs *out_context_blobs)
763 {
764         return create_file_default(handle->conn, req, smb_fname,
765                                    access_mask, share_access,
766                                    create_disposition, create_options,
767                                    file_attributes, oplock_request, lease,
768                                    allocation_size, private_flags,
769                                    sd, ea_list, result,
770                                    pinfo, in_context_blobs, out_context_blobs);
771 }
772
773 static int vfswrap_close(vfs_handle_struct *handle, files_struct *fsp)
774 {
775         int result;
776
777         START_PROFILE(syscall_close);
778         result = fd_close_posix(fsp);
779         END_PROFILE(syscall_close);
780         return result;
781 }
782
783 static ssize_t vfswrap_pread(vfs_handle_struct *handle, files_struct *fsp, void *data,
784                         size_t n, off_t offset)
785 {
786         ssize_t result;
787
788 #if defined(HAVE_PREAD) || defined(HAVE_PREAD64)
789         START_PROFILE_BYTES(syscall_pread, n);
790         result = sys_pread_full(fsp_get_io_fd(fsp), data, n, offset);
791         END_PROFILE_BYTES(syscall_pread);
792
793         if (result == -1 && errno == ESPIPE) {
794                 /* Maintain the fiction that pipes can be seeked (sought?) on. */
795                 result = sys_read(fsp_get_io_fd(fsp), data, n);
796                 fh_set_pos(fsp->fh, 0);
797         }
798
799 #else /* HAVE_PREAD */
800         errno = ENOSYS;
801         result = -1;
802 #endif /* HAVE_PREAD */
803
804         return result;
805 }
806
807 static ssize_t vfswrap_pwrite(vfs_handle_struct *handle, files_struct *fsp, const void *data,
808                         size_t n, off_t offset)
809 {
810         ssize_t result;
811
812 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
813         START_PROFILE_BYTES(syscall_pwrite, n);
814         result = sys_pwrite_full(fsp_get_io_fd(fsp), data, n, offset);
815         END_PROFILE_BYTES(syscall_pwrite);
816
817         if (result == -1 && errno == ESPIPE) {
818                 /* Maintain the fiction that pipes can be sought on. */
819                 result = sys_write(fsp_get_io_fd(fsp), data, n);
820         }
821
822 #else /* HAVE_PWRITE */
823         errno = ENOSYS;
824         result = -1;
825 #endif /* HAVE_PWRITE */
826
827         return result;
828 }
829
830 struct vfswrap_pread_state {
831         ssize_t ret;
832         int fd;
833         void *buf;
834         size_t count;
835         off_t offset;
836
837         struct vfs_aio_state vfs_aio_state;
838         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
839 };
840
841 static void vfs_pread_do(void *private_data);
842 static void vfs_pread_done(struct tevent_req *subreq);
843 static int vfs_pread_state_destructor(struct vfswrap_pread_state *state);
844
845 static struct tevent_req *vfswrap_pread_send(struct vfs_handle_struct *handle,
846                                              TALLOC_CTX *mem_ctx,
847                                              struct tevent_context *ev,
848                                              struct files_struct *fsp,
849                                              void *data,
850                                              size_t n, off_t offset)
851 {
852         struct tevent_req *req, *subreq;
853         struct vfswrap_pread_state *state;
854
855         req = tevent_req_create(mem_ctx, &state, struct vfswrap_pread_state);
856         if (req == NULL) {
857                 return NULL;
858         }
859
860         state->ret = -1;
861         state->fd = fsp_get_io_fd(fsp);
862         state->buf = data;
863         state->count = n;
864         state->offset = offset;
865
866         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pread, profile_p,
867                                      state->profile_bytes, n);
868         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
869
870         subreq = pthreadpool_tevent_job_send(
871                 state, ev, handle->conn->sconn->pool,
872                 vfs_pread_do, state);
873         if (tevent_req_nomem(subreq, req)) {
874                 return tevent_req_post(req, ev);
875         }
876         tevent_req_set_callback(subreq, vfs_pread_done, req);
877
878         talloc_set_destructor(state, vfs_pread_state_destructor);
879
880         return req;
881 }
882
883 static void vfs_pread_do(void *private_data)
884 {
885         struct vfswrap_pread_state *state = talloc_get_type_abort(
886                 private_data, struct vfswrap_pread_state);
887         struct timespec start_time;
888         struct timespec end_time;
889
890         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
891
892         PROFILE_TIMESTAMP(&start_time);
893
894         state->ret = sys_pread_full(state->fd,
895                                     state->buf,
896                                     state->count,
897                                     state->offset);
898
899         if (state->ret == -1) {
900                 state->vfs_aio_state.error = errno;
901         }
902
903         PROFILE_TIMESTAMP(&end_time);
904
905         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
906
907         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
908 }
909
910 static int vfs_pread_state_destructor(struct vfswrap_pread_state *state)
911 {
912         return -1;
913 }
914
915 static void vfs_pread_done(struct tevent_req *subreq)
916 {
917         struct tevent_req *req = tevent_req_callback_data(
918                 subreq, struct tevent_req);
919         struct vfswrap_pread_state *state = tevent_req_data(
920                 req, struct vfswrap_pread_state);
921         int ret;
922
923         ret = pthreadpool_tevent_job_recv(subreq);
924         TALLOC_FREE(subreq);
925         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
926         talloc_set_destructor(state, NULL);
927         if (ret != 0) {
928                 if (ret != EAGAIN) {
929                         tevent_req_error(req, ret);
930                         return;
931                 }
932                 /*
933                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
934                  * means the lower level pthreadpool failed to create a new
935                  * thread. Fallback to sync processing in that case to allow
936                  * some progress for the client.
937                  */
938                 vfs_pread_do(state);
939         }
940
941         tevent_req_done(req);
942 }
943
944 static ssize_t vfswrap_pread_recv(struct tevent_req *req,
945                                   struct vfs_aio_state *vfs_aio_state)
946 {
947         struct vfswrap_pread_state *state = tevent_req_data(
948                 req, struct vfswrap_pread_state);
949
950         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
951                 return -1;
952         }
953
954         *vfs_aio_state = state->vfs_aio_state;
955         return state->ret;
956 }
957
958 struct vfswrap_pwrite_state {
959         ssize_t ret;
960         int fd;
961         const void *buf;
962         size_t count;
963         off_t offset;
964
965         struct vfs_aio_state vfs_aio_state;
966         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
967 };
968
969 static void vfs_pwrite_do(void *private_data);
970 static void vfs_pwrite_done(struct tevent_req *subreq);
971 static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state);
972
973 static struct tevent_req *vfswrap_pwrite_send(struct vfs_handle_struct *handle,
974                                               TALLOC_CTX *mem_ctx,
975                                               struct tevent_context *ev,
976                                               struct files_struct *fsp,
977                                               const void *data,
978                                               size_t n, off_t offset)
979 {
980         struct tevent_req *req, *subreq;
981         struct vfswrap_pwrite_state *state;
982
983         req = tevent_req_create(mem_ctx, &state, struct vfswrap_pwrite_state);
984         if (req == NULL) {
985                 return NULL;
986         }
987
988         state->ret = -1;
989         state->fd = fsp_get_io_fd(fsp);
990         state->buf = data;
991         state->count = n;
992         state->offset = offset;
993
994         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_pwrite, profile_p,
995                                      state->profile_bytes, n);
996         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
997
998         subreq = pthreadpool_tevent_job_send(
999                 state, ev, handle->conn->sconn->pool,
1000                 vfs_pwrite_do, state);
1001         if (tevent_req_nomem(subreq, req)) {
1002                 return tevent_req_post(req, ev);
1003         }
1004         tevent_req_set_callback(subreq, vfs_pwrite_done, req);
1005
1006         talloc_set_destructor(state, vfs_pwrite_state_destructor);
1007
1008         return req;
1009 }
1010
1011 static void vfs_pwrite_do(void *private_data)
1012 {
1013         struct vfswrap_pwrite_state *state = talloc_get_type_abort(
1014                 private_data, struct vfswrap_pwrite_state);
1015         struct timespec start_time;
1016         struct timespec end_time;
1017
1018         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1019
1020         PROFILE_TIMESTAMP(&start_time);
1021
1022         state->ret = sys_pwrite_full(state->fd,
1023                                      state->buf,
1024                                      state->count,
1025                                      state->offset);
1026
1027         if (state->ret == -1) {
1028                 state->vfs_aio_state.error = errno;
1029         }
1030
1031         PROFILE_TIMESTAMP(&end_time);
1032
1033         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1034
1035         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1036 }
1037
1038 static int vfs_pwrite_state_destructor(struct vfswrap_pwrite_state *state)
1039 {
1040         return -1;
1041 }
1042
1043 static void vfs_pwrite_done(struct tevent_req *subreq)
1044 {
1045         struct tevent_req *req = tevent_req_callback_data(
1046                 subreq, struct tevent_req);
1047         struct vfswrap_pwrite_state *state = tevent_req_data(
1048                 req, struct vfswrap_pwrite_state);
1049         int ret;
1050
1051         ret = pthreadpool_tevent_job_recv(subreq);
1052         TALLOC_FREE(subreq);
1053         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1054         talloc_set_destructor(state, NULL);
1055         if (ret != 0) {
1056                 if (ret != EAGAIN) {
1057                         tevent_req_error(req, ret);
1058                         return;
1059                 }
1060                 /*
1061                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1062                  * means the lower level pthreadpool failed to create a new
1063                  * thread. Fallback to sync processing in that case to allow
1064                  * some progress for the client.
1065                  */
1066                 vfs_pwrite_do(state);
1067         }
1068
1069         tevent_req_done(req);
1070 }
1071
1072 static ssize_t vfswrap_pwrite_recv(struct tevent_req *req,
1073                                    struct vfs_aio_state *vfs_aio_state)
1074 {
1075         struct vfswrap_pwrite_state *state = tevent_req_data(
1076                 req, struct vfswrap_pwrite_state);
1077
1078         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1079                 return -1;
1080         }
1081
1082         *vfs_aio_state = state->vfs_aio_state;
1083         return state->ret;
1084 }
1085
1086 struct vfswrap_fsync_state {
1087         ssize_t ret;
1088         int fd;
1089
1090         struct vfs_aio_state vfs_aio_state;
1091         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
1092 };
1093
1094 static void vfs_fsync_do(void *private_data);
1095 static void vfs_fsync_done(struct tevent_req *subreq);
1096 static int vfs_fsync_state_destructor(struct vfswrap_fsync_state *state);
1097
1098 static struct tevent_req *vfswrap_fsync_send(struct vfs_handle_struct *handle,
1099                                              TALLOC_CTX *mem_ctx,
1100                                              struct tevent_context *ev,
1101                                              struct files_struct *fsp)
1102 {
1103         struct tevent_req *req, *subreq;
1104         struct vfswrap_fsync_state *state;
1105
1106         req = tevent_req_create(mem_ctx, &state, struct vfswrap_fsync_state);
1107         if (req == NULL) {
1108                 return NULL;
1109         }
1110
1111         state->ret = -1;
1112         state->fd = fsp_get_io_fd(fsp);
1113
1114         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_fsync, profile_p,
1115                                      state->profile_bytes, 0);
1116         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1117
1118         subreq = pthreadpool_tevent_job_send(
1119                 state, ev, handle->conn->sconn->pool, vfs_fsync_do, state);
1120         if (tevent_req_nomem(subreq, req)) {
1121                 return tevent_req_post(req, ev);
1122         }
1123         tevent_req_set_callback(subreq, vfs_fsync_done, req);
1124
1125         talloc_set_destructor(state, vfs_fsync_state_destructor);
1126
1127         return req;
1128 }
1129
1130 static void vfs_fsync_do(void *private_data)
1131 {
1132         struct vfswrap_fsync_state *state = talloc_get_type_abort(
1133                 private_data, struct vfswrap_fsync_state);
1134         struct timespec start_time;
1135         struct timespec end_time;
1136
1137         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
1138
1139         PROFILE_TIMESTAMP(&start_time);
1140
1141         do {
1142                 state->ret = fsync(state->fd);
1143         } while ((state->ret == -1) && (errno == EINTR));
1144
1145         if (state->ret == -1) {
1146                 state->vfs_aio_state.error = errno;
1147         }
1148
1149         PROFILE_TIMESTAMP(&end_time);
1150
1151         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
1152
1153         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
1154 }
1155
1156 static int vfs_fsync_state_destructor(struct vfswrap_fsync_state *state)
1157 {
1158         return -1;
1159 }
1160
1161 static void vfs_fsync_done(struct tevent_req *subreq)
1162 {
1163         struct tevent_req *req = tevent_req_callback_data(
1164                 subreq, struct tevent_req);
1165         struct vfswrap_fsync_state *state = tevent_req_data(
1166                 req, struct vfswrap_fsync_state);
1167         int ret;
1168
1169         ret = pthreadpool_tevent_job_recv(subreq);
1170         TALLOC_FREE(subreq);
1171         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
1172         talloc_set_destructor(state, NULL);
1173         if (ret != 0) {
1174                 if (ret != EAGAIN) {
1175                         tevent_req_error(req, ret);
1176                         return;
1177                 }
1178                 /*
1179                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
1180                  * means the lower level pthreadpool failed to create a new
1181                  * thread. Fallback to sync processing in that case to allow
1182                  * some progress for the client.
1183                  */
1184                 vfs_fsync_do(state);
1185         }
1186
1187         tevent_req_done(req);
1188 }
1189
1190 static int vfswrap_fsync_recv(struct tevent_req *req,
1191                               struct vfs_aio_state *vfs_aio_state)
1192 {
1193         struct vfswrap_fsync_state *state = tevent_req_data(
1194                 req, struct vfswrap_fsync_state);
1195
1196         if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
1197                 return -1;
1198         }
1199
1200         *vfs_aio_state = state->vfs_aio_state;
1201         return state->ret;
1202 }
1203
1204 static off_t vfswrap_lseek(vfs_handle_struct *handle, files_struct *fsp, off_t offset, int whence)
1205 {
1206         off_t result = 0;
1207
1208         START_PROFILE(syscall_lseek);
1209
1210         result = lseek(fsp_get_io_fd(fsp), offset, whence);
1211         /*
1212          * We want to maintain the fiction that we can seek
1213          * on a fifo for file system purposes. This allows
1214          * people to set up UNIX fifo's that feed data to Windows
1215          * applications. JRA.
1216          */
1217
1218         if((result == -1) && (errno == ESPIPE)) {
1219                 result = 0;
1220                 errno = 0;
1221         }
1222
1223         END_PROFILE(syscall_lseek);
1224         return result;
1225 }
1226
1227 static ssize_t vfswrap_sendfile(vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *hdr,
1228                         off_t offset, size_t n)
1229 {
1230         ssize_t result;
1231
1232         START_PROFILE_BYTES(syscall_sendfile, n);
1233         result = sys_sendfile(tofd, fsp_get_io_fd(fromfsp), hdr, offset, n);
1234         END_PROFILE_BYTES(syscall_sendfile);
1235         return result;
1236 }
1237
1238 static ssize_t vfswrap_recvfile(vfs_handle_struct *handle,
1239                         int fromfd,
1240                         files_struct *tofsp,
1241                         off_t offset,
1242                         size_t n)
1243 {
1244         ssize_t result;
1245
1246         START_PROFILE_BYTES(syscall_recvfile, n);
1247         result = sys_recvfile(fromfd, fsp_get_io_fd(tofsp), offset, n);
1248         END_PROFILE_BYTES(syscall_recvfile);
1249         return result;
1250 }
1251
1252 static int vfswrap_renameat(vfs_handle_struct *handle,
1253                           files_struct *srcfsp,
1254                           const struct smb_filename *smb_fname_src,
1255                           files_struct *dstfsp,
1256                           const struct smb_filename *smb_fname_dst)
1257 {
1258         int result = -1;
1259
1260         START_PROFILE(syscall_renameat);
1261
1262         if (is_named_stream(smb_fname_src) || is_named_stream(smb_fname_dst)) {
1263                 errno = ENOENT;
1264                 goto out;
1265         }
1266
1267         result = renameat(fsp_get_pathref_fd(srcfsp),
1268                         smb_fname_src->base_name,
1269                         fsp_get_pathref_fd(dstfsp),
1270                         smb_fname_dst->base_name);
1271
1272  out:
1273         END_PROFILE(syscall_renameat);
1274         return result;
1275 }
1276
1277 static int vfswrap_stat(vfs_handle_struct *handle,
1278                         struct smb_filename *smb_fname)
1279 {
1280         int result = -1;
1281
1282         START_PROFILE(syscall_stat);
1283
1284         if (is_named_stream(smb_fname)) {
1285                 errno = ENOENT;
1286                 goto out;
1287         }
1288
1289         result = sys_stat(smb_fname->base_name, &smb_fname->st,
1290                           lp_fake_directory_create_times(SNUM(handle->conn)));
1291  out:
1292         END_PROFILE(syscall_stat);
1293         return result;
1294 }
1295
1296 static int vfswrap_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
1297 {
1298         int result;
1299
1300         START_PROFILE(syscall_fstat);
1301         result = sys_fstat(fsp_get_pathref_fd(fsp),
1302                            sbuf, lp_fake_directory_create_times(SNUM(handle->conn)));
1303         END_PROFILE(syscall_fstat);
1304         return result;
1305 }
1306
1307 static int vfswrap_lstat(vfs_handle_struct *handle,
1308                          struct smb_filename *smb_fname)
1309 {
1310         int result = -1;
1311
1312         START_PROFILE(syscall_lstat);
1313
1314         if (is_named_stream(smb_fname)) {
1315                 errno = ENOENT;
1316                 goto out;
1317         }
1318
1319         result = sys_lstat(smb_fname->base_name, &smb_fname->st,
1320                            lp_fake_directory_create_times(SNUM(handle->conn)));
1321  out:
1322         END_PROFILE(syscall_lstat);
1323         return result;
1324 }
1325
1326 static NTSTATUS vfswrap_translate_name(struct vfs_handle_struct *handle,
1327                                        const char *name,
1328                                        enum vfs_translate_direction direction,
1329                                        TALLOC_CTX *mem_ctx,
1330                                        char **mapped_name)
1331 {
1332         return NT_STATUS_NONE_MAPPED;
1333 }
1334
1335 /**
1336  * Return allocated parent directory and basename of path
1337  *
1338  * Note: if requesting name, it is returned as talloc child of the
1339  * parent. Freeing the parent is thus sufficient to free both.
1340  */
1341 static NTSTATUS vfswrap_parent_pathname(struct vfs_handle_struct *handle,
1342                                         TALLOC_CTX *mem_ctx,
1343                                         const struct smb_filename *smb_fname_in,
1344                                         struct smb_filename **parent_dir_out,
1345                                         struct smb_filename **atname_out)
1346 {
1347         TALLOC_CTX *frame = talloc_stackframe();
1348         struct smb_filename *parent = NULL;
1349         struct smb_filename *name = NULL;
1350         char *p = NULL;
1351
1352         parent = cp_smb_filename(frame, smb_fname_in);
1353         if (parent == NULL) {
1354                 TALLOC_FREE(frame);
1355                 return NT_STATUS_NO_MEMORY;
1356         }
1357         TALLOC_FREE(parent->stream_name);
1358         SET_STAT_INVALID(parent->st);
1359
1360         p = strrchr_m(parent->base_name, '/'); /* Find final '/', if any */
1361         if (p == NULL) {
1362                 TALLOC_FREE(parent->base_name);
1363                 parent->base_name = talloc_strdup(parent, ".");
1364                 if (parent->base_name == NULL) {
1365                         TALLOC_FREE(frame);
1366                         return NT_STATUS_NO_MEMORY;
1367                 }
1368                 p = smb_fname_in->base_name;
1369         } else {
1370                 *p = '\0';
1371                 p++;
1372         }
1373
1374         if (atname_out == NULL) {
1375                 *parent_dir_out = talloc_move(mem_ctx, &parent);
1376                 TALLOC_FREE(frame);
1377                 return NT_STATUS_OK;
1378         }
1379
1380         name = cp_smb_filename(frame, smb_fname_in);
1381         if (name == NULL) {
1382                 TALLOC_FREE(frame);
1383                 return NT_STATUS_NO_MEMORY;
1384         }
1385         TALLOC_FREE(name->base_name);
1386
1387         name->base_name = talloc_strdup(name, p);
1388         if (name->base_name == NULL) {
1389                 TALLOC_FREE(frame);
1390                 return NT_STATUS_NO_MEMORY;
1391         }
1392
1393         *parent_dir_out = talloc_move(mem_ctx, &parent);
1394         *atname_out = talloc_move(*parent_dir_out, &name);
1395         TALLOC_FREE(frame);
1396         return NT_STATUS_OK;
1397 }
1398
1399 /*
1400  * Implement the default fsctl operation.
1401  */
1402 static bool vfswrap_logged_ioctl_message = false;
1403
1404 static NTSTATUS vfswrap_fsctl(struct vfs_handle_struct *handle,
1405                               struct files_struct *fsp,
1406                               TALLOC_CTX *ctx,
1407                               uint32_t function,
1408                               uint16_t req_flags, /* Needed for UNICODE ... */
1409                               const uint8_t *_in_data,
1410                               uint32_t in_len,
1411                               uint8_t **_out_data,
1412                               uint32_t max_out_len,
1413                               uint32_t *out_len)
1414 {
1415         const char *in_data = (const char *)_in_data;
1416         char **out_data = (char **)_out_data;
1417         NTSTATUS status;
1418
1419         switch (function) {
1420         case FSCTL_SET_SPARSE:
1421         {
1422                 bool set_sparse = true;
1423
1424                 if (in_len >= 1 && in_data[0] == 0) {
1425                         set_sparse = false;
1426                 }
1427
1428                 status = file_set_sparse(handle->conn, fsp, set_sparse);
1429
1430                 DEBUG(NT_STATUS_IS_OK(status) ? 10 : 9,
1431                       ("FSCTL_SET_SPARSE: fname[%s] set[%u] - %s\n",
1432                        smb_fname_str_dbg(fsp->fsp_name), set_sparse,
1433                        nt_errstr(status)));
1434
1435                 return status;
1436         }
1437
1438         case FSCTL_CREATE_OR_GET_OBJECT_ID:
1439         {
1440                 unsigned char objid[16];
1441                 char *return_data = NULL;
1442
1443                 /* This should return the object-id on this file.
1444                  * I think I'll make this be the inode+dev. JRA.
1445                  */
1446
1447                 DEBUG(10,("FSCTL_CREATE_OR_GET_OBJECT_ID: called on %s\n",
1448                           fsp_fnum_dbg(fsp)));
1449
1450                 *out_len = MIN(max_out_len, 64);
1451
1452                 /* Hmmm, will this cause problems if less data asked for? */
1453                 return_data = talloc_array(ctx, char, 64);
1454                 if (return_data == NULL) {
1455                         return NT_STATUS_NO_MEMORY;
1456                 }
1457
1458                 /* For backwards compatibility only store the dev/inode. */
1459                 push_file_id_16(return_data, &fsp->file_id);
1460                 memcpy(return_data+16,create_volume_objectid(fsp->conn,objid),16);
1461                 push_file_id_16(return_data+32, &fsp->file_id);
1462                 memset(return_data+48, 0, 16);
1463                 *out_data = return_data;
1464                 return NT_STATUS_OK;
1465         }
1466
1467         case FSCTL_GET_REPARSE_POINT:
1468         {
1469                 status = fsctl_get_reparse_point(
1470                         fsp, ctx, out_data, max_out_len, out_len);
1471                 return status;
1472         }
1473
1474         case FSCTL_SET_REPARSE_POINT:
1475         {
1476                 status = fsctl_set_reparse_point(fsp, ctx, _in_data, in_len);
1477                 return status;
1478         }
1479
1480         case FSCTL_DELETE_REPARSE_POINT:
1481         {
1482                 status = fsctl_del_reparse_point(fsp, ctx, _in_data, in_len);
1483                 return status;
1484         }
1485
1486         case FSCTL_GET_SHADOW_COPY_DATA:
1487         {
1488                 /*
1489                  * This is called to retrieve the number of Shadow Copies (a.k.a. snapshots)
1490                  * and return their volume names.  If max_data_count is 16, then it is just
1491                  * asking for the number of volumes and length of the combined names.
1492                  *
1493                  * pdata is the data allocated by our caller, but that uses
1494                  * total_data_count (which is 0 in our case) rather than max_data_count.
1495                  * Allocate the correct amount and return the pointer to let
1496                  * it be deallocated when we return.
1497                  */
1498                 struct shadow_copy_data *shadow_data = NULL;
1499                 bool labels = False;
1500                 uint32_t labels_data_count = 0;
1501                 uint32_t i;
1502                 char *cur_pdata = NULL;
1503
1504                 if (max_out_len < 16) {
1505                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) < 16 is invalid!\n",
1506                                 max_out_len));
1507                         return NT_STATUS_INVALID_PARAMETER;
1508                 }
1509
1510                 if (max_out_len > 16) {
1511                         labels = True;
1512                 }
1513
1514                 shadow_data = talloc_zero(ctx, struct shadow_copy_data);
1515                 if (shadow_data == NULL) {
1516                         DEBUG(0,("TALLOC_ZERO() failed!\n"));
1517                         return NT_STATUS_NO_MEMORY;
1518                 }
1519
1520                 /*
1521                  * Call the VFS routine to actually do the work.
1522                  */
1523                 if (SMB_VFS_GET_SHADOW_COPY_DATA(fsp, shadow_data, labels)!=0) {
1524                         int log_lev = 0;
1525                         if (errno == 0) {
1526                                 /* broken module didn't set errno on error */
1527                                 status = NT_STATUS_UNSUCCESSFUL;
1528                         } else {
1529                                 status = map_nt_error_from_unix(errno);
1530                                 if (NT_STATUS_EQUAL(status,
1531                                                     NT_STATUS_NOT_SUPPORTED)) {
1532                                         log_lev = 5;
1533                                 }
1534                         }
1535                         DEBUG(log_lev, ("FSCTL_GET_SHADOW_COPY_DATA: "
1536                                         "connectpath %s, failed - %s.\n",
1537                                         fsp->conn->connectpath,
1538                                         nt_errstr(status)));
1539                         TALLOC_FREE(shadow_data);
1540                         return status;
1541                 }
1542
1543                 labels_data_count = (shadow_data->num_volumes * 2 *
1544                                         sizeof(SHADOW_COPY_LABEL)) + 2;
1545
1546                 if (!labels) {
1547                         *out_len = 16;
1548                 } else {
1549                         *out_len = 12 + labels_data_count;
1550                 }
1551
1552                 if (max_out_len < *out_len) {
1553                         DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: max_data_count(%u) too small (%u) bytes needed!\n",
1554                                 max_out_len, *out_len));
1555                         TALLOC_FREE(shadow_data);
1556                         return NT_STATUS_BUFFER_TOO_SMALL;
1557                 }
1558
1559                 cur_pdata = talloc_zero_array(ctx, char, *out_len);
1560                 if (cur_pdata == NULL) {
1561                         TALLOC_FREE(shadow_data);
1562                         return NT_STATUS_NO_MEMORY;
1563                 }
1564
1565                 *out_data = cur_pdata;
1566
1567                 /* num_volumes 4 bytes */
1568                 SIVAL(cur_pdata, 0, shadow_data->num_volumes);
1569
1570                 if (labels) {
1571                         /* num_labels 4 bytes */
1572                         SIVAL(cur_pdata, 4, shadow_data->num_volumes);
1573                 }
1574
1575                 /* needed_data_count 4 bytes */
1576                 SIVAL(cur_pdata, 8, labels_data_count);
1577
1578                 cur_pdata += 12;
1579
1580                 DEBUG(10,("FSCTL_GET_SHADOW_COPY_DATA: %u volumes for path[%s].\n",
1581                           shadow_data->num_volumes, fsp_str_dbg(fsp)));
1582                 if (labels && shadow_data->labels) {
1583                         for (i=0; i<shadow_data->num_volumes; i++) {
1584                                 size_t len = 0;
1585                                 status = srvstr_push(cur_pdata, req_flags,
1586                                             cur_pdata, shadow_data->labels[i],
1587                                             2 * sizeof(SHADOW_COPY_LABEL),
1588                                             STR_UNICODE|STR_TERMINATE, &len);
1589                                 if (!NT_STATUS_IS_OK(status)) {
1590                                         TALLOC_FREE(*out_data);
1591                                         TALLOC_FREE(shadow_data);
1592                                         return status;
1593                                 }
1594                                 cur_pdata += 2 * sizeof(SHADOW_COPY_LABEL);
1595                                 DEBUGADD(10,("Label[%u]: '%s'\n",i,shadow_data->labels[i]));
1596                         }
1597                 }
1598
1599                 TALLOC_FREE(shadow_data);
1600
1601                 return NT_STATUS_OK;
1602         }
1603
1604         case FSCTL_FIND_FILES_BY_SID:
1605         {
1606                 /* pretend this succeeded -
1607                  *
1608                  * we have to send back a list with all files owned by this SID
1609                  *
1610                  * but I have to check that --metze
1611                  */
1612                 ssize_t ret;
1613                 struct dom_sid sid;
1614                 struct dom_sid_buf buf;
1615                 uid_t uid;
1616                 size_t sid_len;
1617
1618                 DEBUG(10, ("FSCTL_FIND_FILES_BY_SID: called on %s\n",
1619                            fsp_fnum_dbg(fsp)));
1620
1621                 if (in_len < 8) {
1622                         /* NT_STATUS_BUFFER_TOO_SMALL maybe? */
1623                         return NT_STATUS_INVALID_PARAMETER;
1624                 }
1625
1626                 sid_len = MIN(in_len - 4,SID_MAX_SIZE);
1627
1628                 /* unknown 4 bytes: this is not the length of the sid :-(  */
1629                 /*unknown = IVAL(pdata,0);*/
1630
1631                 ret = sid_parse(_in_data + 4, sid_len, &sid);
1632                 if (ret == -1) {
1633                         return NT_STATUS_INVALID_PARAMETER;
1634                 }
1635                 DEBUGADD(10, ("for SID: %s\n",
1636                               dom_sid_str_buf(&sid, &buf)));
1637
1638                 if (!sid_to_uid(&sid, &uid)) {
1639                         DEBUG(0,("sid_to_uid: failed, sid[%s] sid_len[%lu]\n",
1640                                  dom_sid_str_buf(&sid, &buf),
1641                                  (unsigned long)sid_len));
1642                         uid = (-1);
1643                 }
1644
1645                 /* we can take a look at the find source :-)
1646                  *
1647                  * find ./ -uid $uid  -name '*'   is what we need here
1648                  *
1649                  *
1650                  * and send 4bytes len and then NULL terminated unicode strings
1651                  * for each file
1652                  *
1653                  * but I don't know how to deal with the paged results
1654                  * (maybe we can hang the result anywhere in the fsp struct)
1655                  *
1656                  * but I don't know how to deal with the paged results
1657                  * (maybe we can hang the result anywhere in the fsp struct)
1658                  *
1659                  * we don't send all files at once
1660                  * and at the next we should *not* start from the beginning,
1661                  * so we have to cache the result
1662                  *
1663                  * --metze
1664                  */
1665
1666                 /* this works for now... */
1667                 return NT_STATUS_OK;
1668         }
1669
1670         case FSCTL_QUERY_ALLOCATED_RANGES:
1671         {
1672                 /* FIXME: This is just a dummy reply, telling that all of the
1673                  * file is allocated. MKS cp needs that.
1674                  * Adding the real allocated ranges via FIEMAP on Linux
1675                  * and SEEK_DATA/SEEK_HOLE on Solaris is needed to make
1676                  * this FSCTL correct for sparse files.
1677                  */
1678                 uint64_t offset, length;
1679                 char *out_data_tmp = NULL;
1680
1681                 if (in_len != 16) {
1682                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: data_count(%u) != 16 is invalid!\n",
1683                                 in_len));
1684                         return NT_STATUS_INVALID_PARAMETER;
1685                 }
1686
1687                 if (max_out_len < 16) {
1688                         DEBUG(0,("FSCTL_QUERY_ALLOCATED_RANGES: max_out_len (%u) < 16 is invalid!\n",
1689                                 max_out_len));
1690                         return NT_STATUS_INVALID_PARAMETER;
1691                 }
1692
1693                 offset = BVAL(in_data,0);
1694                 length = BVAL(in_data,8);
1695
1696                 if (offset + length < offset) {
1697                         /* No 64-bit integer wrap. */
1698                         return NT_STATUS_INVALID_PARAMETER;
1699                 }
1700
1701                 /* Shouldn't this be SMB_VFS_STAT ... ? */
1702                 status = vfs_stat_fsp(fsp);
1703                 if (!NT_STATUS_IS_OK(status)) {
1704                         return status;
1705                 }
1706
1707                 *out_len = 16;
1708                 out_data_tmp = talloc_array(ctx, char, *out_len);
1709                 if (out_data_tmp == NULL) {
1710                         DEBUG(10, ("unable to allocate memory for response\n"));
1711                         return NT_STATUS_NO_MEMORY;
1712                 }
1713
1714                 if (offset > fsp->fsp_name->st.st_ex_size ||
1715                                 fsp->fsp_name->st.st_ex_size == 0 ||
1716                                 length == 0) {
1717                         memset(out_data_tmp, 0, *out_len);
1718                 } else {
1719                         uint64_t end = offset + length;
1720                         end = MIN(end, fsp->fsp_name->st.st_ex_size);
1721                         SBVAL(out_data_tmp, 0, 0);
1722                         SBVAL(out_data_tmp, 8, end);
1723                 }
1724
1725                 *out_data = out_data_tmp;
1726
1727                 return NT_STATUS_OK;
1728         }
1729
1730         case FSCTL_IS_VOLUME_DIRTY:
1731         {
1732                 DEBUG(10,("FSCTL_IS_VOLUME_DIRTY: called on %s "
1733                           "(but remotely not supported)\n", fsp_fnum_dbg(fsp)));
1734                 /*
1735                  * http://msdn.microsoft.com/en-us/library/cc232128%28PROT.10%29.aspx
1736                  * says we have to respond with NT_STATUS_INVALID_PARAMETER
1737                  */
1738                 return NT_STATUS_INVALID_PARAMETER;
1739         }
1740
1741         default:
1742                 /*
1743                  * Only print once ... unfortunately there could be lots of
1744                  * different FSCTLs that are called.
1745                  */
1746                 if (!vfswrap_logged_ioctl_message) {
1747                         vfswrap_logged_ioctl_message = true;
1748                         DEBUG(2, ("%s (0x%x): Currently not implemented.\n",
1749                         __func__, function));
1750                 }
1751         }
1752
1753         return NT_STATUS_NOT_SUPPORTED;
1754 }
1755
1756 static bool vfswrap_is_offline(struct connection_struct *conn,
1757                                const struct smb_filename *fname);
1758
1759 struct vfswrap_get_dos_attributes_state {
1760         struct vfs_aio_state aio_state;
1761         connection_struct *conn;
1762         TALLOC_CTX *mem_ctx;
1763         struct tevent_context *ev;
1764         files_struct *dir_fsp;
1765         struct smb_filename *smb_fname;
1766         uint32_t dosmode;
1767         bool as_root;
1768 };
1769
1770 static void vfswrap_get_dos_attributes_getxattr_done(struct tevent_req *subreq);
1771
1772 static struct tevent_req *vfswrap_get_dos_attributes_send(
1773                         TALLOC_CTX *mem_ctx,
1774                         struct tevent_context *ev,
1775                         struct vfs_handle_struct *handle,
1776                         files_struct *dir_fsp,
1777                         struct smb_filename *smb_fname)
1778 {
1779         struct tevent_req *req = NULL;
1780         struct tevent_req *subreq = NULL;
1781         struct vfswrap_get_dos_attributes_state *state = NULL;
1782
1783         req = tevent_req_create(mem_ctx, &state,
1784                                 struct vfswrap_get_dos_attributes_state);
1785         if (req == NULL) {
1786                 return NULL;
1787         }
1788
1789         *state = (struct vfswrap_get_dos_attributes_state) {
1790                 .conn = dir_fsp->conn,
1791                 .mem_ctx = mem_ctx,
1792                 .ev = ev,
1793                 .dir_fsp = dir_fsp,
1794                 .smb_fname = smb_fname,
1795         };
1796
1797         subreq = SMB_VFS_GETXATTRAT_SEND(state,
1798                                          ev,
1799                                          dir_fsp,
1800                                          smb_fname,
1801                                          SAMBA_XATTR_DOS_ATTRIB,
1802                                          sizeof(fstring));
1803         if (tevent_req_nomem(subreq, req)) {
1804                 return tevent_req_post(req, ev);
1805         }
1806         tevent_req_set_callback(subreq,
1807                                 vfswrap_get_dos_attributes_getxattr_done,
1808                                 req);
1809
1810         return req;
1811 }
1812
1813 static void vfswrap_get_dos_attributes_getxattr_done(struct tevent_req *subreq)
1814 {
1815         struct tevent_req *req =
1816                 tevent_req_callback_data(subreq,
1817                 struct tevent_req);
1818         struct vfswrap_get_dos_attributes_state *state =
1819                 tevent_req_data(req,
1820                 struct vfswrap_get_dos_attributes_state);
1821         ssize_t xattr_size;
1822         DATA_BLOB blob = {0};
1823         char *path = NULL;
1824         char *tofree = NULL;
1825         char pathbuf[PATH_MAX+1];
1826         ssize_t pathlen;
1827         struct smb_filename smb_fname;
1828         bool offline;
1829         NTSTATUS status;
1830
1831         xattr_size = SMB_VFS_GETXATTRAT_RECV(subreq,
1832                                              &state->aio_state,
1833                                              state,
1834                                              &blob.data);
1835         TALLOC_FREE(subreq);
1836         if (xattr_size == -1) {
1837                 status = map_nt_error_from_unix(state->aio_state.error);
1838
1839                 if (state->as_root) {
1840                         tevent_req_nterror(req, status);
1841                         return;
1842                 }
1843                 if (!NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
1844                         tevent_req_nterror(req, status);
1845                         return;
1846                 }
1847
1848                 state->as_root = true;
1849
1850                 become_root();
1851                 subreq = SMB_VFS_GETXATTRAT_SEND(state,
1852                                                  state->ev,
1853                                                  state->dir_fsp,
1854                                                  state->smb_fname,
1855                                                  SAMBA_XATTR_DOS_ATTRIB,
1856                                                  sizeof(fstring));
1857                 unbecome_root();
1858                 if (tevent_req_nomem(subreq, req)) {
1859                         return;
1860                 }
1861                 tevent_req_set_callback(subreq,
1862                                         vfswrap_get_dos_attributes_getxattr_done,
1863                                         req);
1864                 return;
1865         }
1866
1867         blob.length = xattr_size;
1868
1869         status = parse_dos_attribute_blob(state->smb_fname,
1870                                           blob,
1871                                           &state->dosmode);
1872         if (!NT_STATUS_IS_OK(status)) {
1873                 tevent_req_nterror(req, status);
1874                 return;
1875         }
1876
1877         pathlen = full_path_tos(state->dir_fsp->fsp_name->base_name,
1878                                 state->smb_fname->base_name,
1879                                 pathbuf,
1880                                 sizeof(pathbuf),
1881                                 &path,
1882                                 &tofree);
1883         if (pathlen == -1) {
1884                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1885                 return;
1886         }
1887
1888         smb_fname = (struct smb_filename) {
1889                 .base_name = path,
1890                 .st = state->smb_fname->st,
1891                 .flags = state->smb_fname->flags,
1892                 .twrp = state->smb_fname->twrp,
1893         };
1894
1895         offline = vfswrap_is_offline(state->conn, &smb_fname);
1896         if (offline) {
1897                 state->dosmode |= FILE_ATTRIBUTE_OFFLINE;
1898         }
1899         TALLOC_FREE(tofree);
1900
1901         tevent_req_done(req);
1902         return;
1903 }
1904
1905 static NTSTATUS vfswrap_get_dos_attributes_recv(struct tevent_req *req,
1906                                                 struct vfs_aio_state *aio_state,
1907                                                 uint32_t *dosmode)
1908 {
1909         struct vfswrap_get_dos_attributes_state *state =
1910                 tevent_req_data(req,
1911                 struct vfswrap_get_dos_attributes_state);
1912         NTSTATUS status;
1913
1914         if (tevent_req_is_nterror(req, &status)) {
1915                 tevent_req_received(req);
1916                 return status;
1917         }
1918
1919         *aio_state = state->aio_state;
1920         *dosmode = state->dosmode;
1921         tevent_req_received(req);
1922         return NT_STATUS_OK;
1923 }
1924
1925 static NTSTATUS vfswrap_fget_dos_attributes(struct vfs_handle_struct *handle,
1926                                             struct files_struct *fsp,
1927                                             uint32_t *dosmode)
1928 {
1929         bool offline;
1930
1931         offline = vfswrap_is_offline(handle->conn, fsp->fsp_name);
1932         if (offline) {
1933                 *dosmode |= FILE_ATTRIBUTE_OFFLINE;
1934         }
1935
1936         return fget_ea_dos_attribute(fsp, dosmode);
1937 }
1938
1939 static NTSTATUS vfswrap_fset_dos_attributes(struct vfs_handle_struct *handle,
1940                                             struct files_struct *fsp,
1941                                             uint32_t dosmode)
1942 {
1943         return set_ea_dos_attribute(handle->conn, fsp->fsp_name, dosmode);
1944 }
1945
1946 static struct vfs_offload_ctx *vfswrap_offload_ctx;
1947
1948 struct vfswrap_offload_read_state {
1949         DATA_BLOB token;
1950 };
1951
1952 static struct tevent_req *vfswrap_offload_read_send(
1953         TALLOC_CTX *mem_ctx,
1954         struct tevent_context *ev,
1955         struct vfs_handle_struct *handle,
1956         struct files_struct *fsp,
1957         uint32_t fsctl,
1958         uint32_t ttl,
1959         off_t offset,
1960         size_t to_copy)
1961 {
1962         struct tevent_req *req = NULL;
1963         struct vfswrap_offload_read_state *state = NULL;
1964         NTSTATUS status;
1965
1966         req = tevent_req_create(mem_ctx, &state,
1967                                 struct vfswrap_offload_read_state);
1968         if (req == NULL) {
1969                 return NULL;
1970         }
1971
1972         status = vfs_offload_token_ctx_init(fsp->conn->sconn->client,
1973                                             &vfswrap_offload_ctx);
1974         if (tevent_req_nterror(req, status)) {
1975                 return tevent_req_post(req, ev);
1976         }
1977
1978         if (fsctl != FSCTL_SRV_REQUEST_RESUME_KEY) {
1979                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
1980                 return tevent_req_post(req, ev);
1981         }
1982
1983         status = vfs_offload_token_create_blob(state, fsp, fsctl,
1984                                                &state->token);
1985         if (tevent_req_nterror(req, status)) {
1986                 return tevent_req_post(req, ev);
1987         }
1988
1989         status = vfs_offload_token_db_store_fsp(vfswrap_offload_ctx, fsp,
1990                                                 &state->token);
1991         if (tevent_req_nterror(req, status)) {
1992                 return tevent_req_post(req, ev);
1993         }
1994
1995         tevent_req_done(req);
1996         return tevent_req_post(req, ev);
1997 }
1998
1999 static NTSTATUS vfswrap_offload_read_recv(struct tevent_req *req,
2000                                           struct vfs_handle_struct *handle,
2001                                           TALLOC_CTX *mem_ctx,
2002                                           DATA_BLOB *token)
2003 {
2004         struct vfswrap_offload_read_state *state = tevent_req_data(
2005                 req, struct vfswrap_offload_read_state);
2006         NTSTATUS status;
2007
2008         if (tevent_req_is_nterror(req, &status)) {
2009                 tevent_req_received(req);
2010                 return status;
2011         }
2012
2013         token->length = state->token.length;
2014         token->data = talloc_move(mem_ctx, &state->token.data);
2015
2016         tevent_req_received(req);
2017         return NT_STATUS_OK;
2018 }
2019
2020 struct vfswrap_offload_write_state {
2021         uint8_t *buf;
2022         bool read_lck_locked;
2023         bool write_lck_locked;
2024         DATA_BLOB *token;
2025         struct tevent_context *src_ev;
2026         struct files_struct *src_fsp;
2027         off_t src_off;
2028         struct tevent_context *dst_ev;
2029         struct files_struct *dst_fsp;
2030         off_t dst_off;
2031         off_t to_copy;
2032         off_t remaining;
2033         size_t next_io_size;
2034 };
2035
2036 static void vfswrap_offload_write_cleanup(struct tevent_req *req,
2037                                           enum tevent_req_state req_state)
2038 {
2039         struct vfswrap_offload_write_state *state = tevent_req_data(
2040                 req, struct vfswrap_offload_write_state);
2041         bool ok;
2042
2043         if (state->dst_fsp == NULL) {
2044                 return;
2045         }
2046
2047         ok = change_to_user_and_service_by_fsp(state->dst_fsp);
2048         SMB_ASSERT(ok);
2049         state->dst_fsp = NULL;
2050 }
2051
2052 static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req);
2053
2054 static struct tevent_req *vfswrap_offload_write_send(
2055         struct vfs_handle_struct *handle,
2056         TALLOC_CTX *mem_ctx,
2057         struct tevent_context *ev,
2058         uint32_t fsctl,
2059         DATA_BLOB *token,
2060         off_t transfer_offset,
2061         struct files_struct *dest_fsp,
2062         off_t dest_off,
2063         off_t to_copy)
2064 {
2065         struct tevent_req *req;
2066         struct vfswrap_offload_write_state *state = NULL;
2067         /* off_t is signed! */
2068         off_t max_offset = INT64_MAX - to_copy;
2069         size_t num = MIN(to_copy, COPYCHUNK_MAX_TOTAL_LEN);
2070         files_struct *src_fsp = NULL;
2071         NTSTATUS status;
2072         bool ok;
2073
2074         req = tevent_req_create(mem_ctx, &state,
2075                                 struct vfswrap_offload_write_state);
2076         if (req == NULL) {
2077                 return NULL;
2078         }
2079
2080         *state = (struct vfswrap_offload_write_state) {
2081                 .token = token,
2082                 .src_off = transfer_offset,
2083                 .dst_ev = ev,
2084                 .dst_fsp = dest_fsp,
2085                 .dst_off = dest_off,
2086                 .to_copy = to_copy,
2087                 .remaining = to_copy,
2088         };
2089
2090         tevent_req_set_cleanup_fn(req, vfswrap_offload_write_cleanup);
2091
2092         switch (fsctl) {
2093         case FSCTL_SRV_COPYCHUNK:
2094         case FSCTL_SRV_COPYCHUNK_WRITE:
2095                 break;
2096
2097         case FSCTL_OFFLOAD_WRITE:
2098                 tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
2099                 return tevent_req_post(req, ev);
2100
2101         case FSCTL_DUP_EXTENTS_TO_FILE:
2102                 DBG_DEBUG("COW clones not supported by vfs_default\n");
2103                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2104                 return tevent_req_post(req, ev);
2105
2106         default:
2107                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2108                 return tevent_req_post(req, ev);
2109         }
2110
2111         /*
2112          * From here on we assume a copy-chunk fsctl
2113          */
2114
2115         if (to_copy == 0) {
2116                 tevent_req_done(req);
2117                 return tevent_req_post(req, ev);
2118         }
2119
2120         if (state->src_off > max_offset) {
2121                 /*
2122                  * Protect integer checks below.
2123                  */
2124                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2125                 return tevent_req_post(req, ev);
2126         }
2127         if (state->src_off < 0) {
2128                 /*
2129                  * Protect integer checks below.
2130                  */
2131                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2132                 return tevent_req_post(req, ev);
2133         }
2134         if (state->dst_off > max_offset) {
2135                 /*
2136                  * Protect integer checks below.
2137                  */
2138                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2139                 return tevent_req_post(req, ev);
2140         }
2141         if (state->dst_off < 0) {
2142                 /*
2143                  * Protect integer checks below.
2144                  */
2145                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
2146                 return tevent_req_post(req, ev);
2147         }
2148
2149         status = vfs_offload_token_db_fetch_fsp(vfswrap_offload_ctx,
2150                                                 token, &src_fsp);
2151         if (tevent_req_nterror(req, status)) {
2152                 return tevent_req_post(req, ev);
2153         }
2154
2155         DBG_DEBUG("server side copy chunk of length %" PRIu64 "\n", to_copy);
2156
2157         status = vfs_offload_token_check_handles(fsctl, src_fsp, dest_fsp);
2158         if (!NT_STATUS_IS_OK(status)) {
2159                 tevent_req_nterror(req, status);
2160                 return tevent_req_post(req, ev);
2161         }
2162
2163         ok = change_to_user_and_service_by_fsp(src_fsp);
2164         if (!ok) {
2165                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
2166                 return tevent_req_post(req, ev);
2167         }
2168
2169         state->src_ev = src_fsp->conn->sconn->ev_ctx;
2170         state->src_fsp = src_fsp;
2171
2172         status = vfs_stat_fsp(src_fsp);
2173         if (tevent_req_nterror(req, status)) {
2174                 return tevent_req_post(req, ev);
2175         }
2176
2177         if (src_fsp->fsp_name->st.st_ex_size < state->src_off + to_copy) {
2178                 /*
2179                  * [MS-SMB2] 3.3.5.15.6 Handling a Server-Side Data Copy Request
2180                  *   If the SourceOffset or SourceOffset + Length extends beyond
2181                  *   the end of file, the server SHOULD<240> treat this as a
2182                  *   STATUS_END_OF_FILE error.
2183                  * ...
2184                  *   <240> Section 3.3.5.15.6: Windows servers will return
2185                  *   STATUS_INVALID_VIEW_SIZE instead of STATUS_END_OF_FILE.
2186                  */
2187                 tevent_req_nterror(req, NT_STATUS_INVALID_VIEW_SIZE);
2188                 return tevent_req_post(req, ev);
2189         }
2190
2191         state->buf = talloc_array(state, uint8_t, num);
2192         if (tevent_req_nomem(state->buf, req)) {
2193                 return tevent_req_post(req, ev);
2194         }
2195
2196         status = vfswrap_offload_write_loop(req);
2197         if (!NT_STATUS_IS_OK(status)) {
2198                 tevent_req_nterror(req, status);
2199                 return tevent_req_post(req, ev);
2200         }
2201
2202         return req;
2203 }
2204
2205 static void vfswrap_offload_write_read_done(struct tevent_req *subreq);
2206
2207 static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req)
2208 {
2209         struct vfswrap_offload_write_state *state = tevent_req_data(
2210                 req, struct vfswrap_offload_write_state);
2211         struct tevent_req *subreq = NULL;
2212         struct lock_struct read_lck;
2213         bool ok;
2214
2215         /*
2216          * This is called under the context of state->src_fsp.
2217          */
2218
2219         state->next_io_size = MIN(state->remaining, talloc_array_length(state->buf));
2220
2221         init_strict_lock_struct(state->src_fsp,
2222                                 state->src_fsp->op->global->open_persistent_id,
2223                                 state->src_off,
2224                                 state->next_io_size,
2225                                 READ_LOCK,
2226                                 &read_lck);
2227
2228         ok = SMB_VFS_STRICT_LOCK_CHECK(state->src_fsp->conn,
2229                                  state->src_fsp,
2230                                  &read_lck);
2231         if (!ok) {
2232                 return NT_STATUS_FILE_LOCK_CONFLICT;
2233         }
2234
2235         subreq = SMB_VFS_PREAD_SEND(state,
2236                                     state->src_ev,
2237                                     state->src_fsp,
2238                                     state->buf,
2239                                     state->next_io_size,
2240                                     state->src_off);
2241         if (subreq == NULL) {
2242                 return NT_STATUS_NO_MEMORY;
2243         }
2244         tevent_req_set_callback(subreq, vfswrap_offload_write_read_done, req);
2245
2246         return NT_STATUS_OK;
2247 }
2248
2249 static void vfswrap_offload_write_write_done(struct tevent_req *subreq);
2250
2251 static void vfswrap_offload_write_read_done(struct tevent_req *subreq)
2252 {
2253         struct tevent_req *req = tevent_req_callback_data(
2254                 subreq, struct tevent_req);
2255         struct vfswrap_offload_write_state *state = tevent_req_data(
2256                 req, struct vfswrap_offload_write_state);
2257         struct vfs_aio_state aio_state;
2258         struct lock_struct write_lck;
2259         ssize_t nread;
2260         bool ok;
2261
2262         nread = SMB_VFS_PREAD_RECV(subreq, &aio_state);
2263         TALLOC_FREE(subreq);
2264         if (nread == -1) {
2265                 DBG_ERR("read failed: %s\n", strerror(aio_state.error));
2266                 tevent_req_nterror(req, map_nt_error_from_unix(aio_state.error));
2267                 return;
2268         }
2269         if (nread != state->next_io_size) {
2270                 DBG_ERR("Short read, only %zd of %zu\n",
2271                         nread, state->next_io_size);
2272                 tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
2273                 return;
2274         }
2275
2276         state->src_off += nread;
2277
2278         ok = change_to_user_and_service_by_fsp(state->dst_fsp);
2279         if (!ok) {
2280                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2281                 return;
2282         }
2283
2284         init_strict_lock_struct(state->dst_fsp,
2285                                 state->dst_fsp->op->global->open_persistent_id,
2286                                 state->dst_off,
2287                                 state->next_io_size,
2288                                 WRITE_LOCK,
2289                                 &write_lck);
2290
2291         ok = SMB_VFS_STRICT_LOCK_CHECK(state->dst_fsp->conn,
2292                                  state->dst_fsp,
2293                                  &write_lck);
2294         if (!ok) {
2295                 tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
2296                 return;
2297         }
2298
2299         subreq = SMB_VFS_PWRITE_SEND(state,
2300                                      state->dst_ev,
2301                                      state->dst_fsp,
2302                                      state->buf,
2303                                      state->next_io_size,
2304                                      state->dst_off);
2305         if (subreq == NULL) {
2306                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
2307                 return;
2308         }
2309         tevent_req_set_callback(subreq, vfswrap_offload_write_write_done, req);
2310 }
2311
2312 static void vfswrap_offload_write_write_done(struct tevent_req *subreq)
2313 {
2314         struct tevent_req *req = tevent_req_callback_data(
2315                 subreq, struct tevent_req);
2316         struct vfswrap_offload_write_state *state = tevent_req_data(
2317                 req, struct vfswrap_offload_write_state);
2318         struct vfs_aio_state aio_state;
2319         ssize_t nwritten;
2320         NTSTATUS status;
2321         bool ok;
2322
2323         nwritten = SMB_VFS_PWRITE_RECV(subreq, &aio_state);
2324         TALLOC_FREE(subreq);
2325         if (nwritten == -1) {
2326                 DBG_ERR("write failed: %s\n", strerror(aio_state.error));
2327                 tevent_req_nterror(req, map_nt_error_from_unix(aio_state.error));
2328                 return;
2329         }
2330         if (nwritten != state->next_io_size) {
2331                 DBG_ERR("Short write, only %zd of %zu\n", nwritten, state->next_io_size);
2332                 tevent_req_nterror(req, NT_STATUS_IO_DEVICE_ERROR);
2333                 return;
2334         }
2335
2336         state->dst_off += nwritten;
2337
2338         if (state->remaining < nwritten) {
2339                 /* Paranoia check */
2340                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2341                 return;
2342         }
2343         state->remaining -= nwritten;
2344         if (state->remaining == 0) {
2345                 tevent_req_done(req);
2346                 return;
2347         }
2348
2349         ok = change_to_user_and_service_by_fsp(state->src_fsp);
2350         if (!ok) {
2351                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2352                 return;
2353         }
2354
2355         status = vfswrap_offload_write_loop(req);
2356         if (!NT_STATUS_IS_OK(status)) {
2357                 tevent_req_nterror(req, status);
2358                 return;
2359         }
2360
2361         return;
2362 }
2363
2364 static NTSTATUS vfswrap_offload_write_recv(struct vfs_handle_struct *handle,
2365                                         struct tevent_req *req,
2366                                         off_t *copied)
2367 {
2368         struct vfswrap_offload_write_state *state = tevent_req_data(
2369                 req, struct vfswrap_offload_write_state);
2370         NTSTATUS status;
2371
2372         if (tevent_req_is_nterror(req, &status)) {
2373                 DBG_DEBUG("copy chunk failed: %s\n", nt_errstr(status));
2374                 *copied = 0;
2375                 tevent_req_received(req);
2376                 return status;
2377         }
2378
2379         *copied = state->to_copy;
2380         DBG_DEBUG("copy chunk copied %lu\n", (unsigned long)*copied);
2381         tevent_req_received(req);
2382
2383         return NT_STATUS_OK;
2384 }
2385
2386 static NTSTATUS vfswrap_fget_compression(struct vfs_handle_struct *handle,
2387                                         TALLOC_CTX *mem_ctx,
2388                                         struct files_struct *fsp,
2389                                         uint16_t *_compression_fmt)
2390 {
2391         return NT_STATUS_INVALID_DEVICE_REQUEST;
2392 }
2393
2394 static NTSTATUS vfswrap_set_compression(struct vfs_handle_struct *handle,
2395                                         TALLOC_CTX *mem_ctx,
2396                                         struct files_struct *fsp,
2397                                         uint16_t compression_fmt)
2398 {
2399         return NT_STATUS_INVALID_DEVICE_REQUEST;
2400 }
2401
2402 /********************************************************************
2403  Given a stat buffer return the allocated size on disk, taking into
2404  account sparse files.
2405 ********************************************************************/
2406 static uint64_t vfswrap_get_alloc_size(vfs_handle_struct *handle,
2407                                        struct files_struct *fsp,
2408                                        const SMB_STRUCT_STAT *sbuf)
2409 {
2410         uint64_t result;
2411
2412         START_PROFILE(syscall_get_alloc_size);
2413
2414         if(S_ISDIR(sbuf->st_ex_mode)) {
2415                 result = 0;
2416                 goto out;
2417         }
2418
2419 #if defined(HAVE_STAT_ST_BLOCKS) && defined(STAT_ST_BLOCKSIZE)
2420         /* The type of st_blocksize is blkcnt_t which *MUST* be
2421            signed (according to POSIX) and can be less than 64-bits.
2422            Ensure when we're converting to 64 bits wide we don't
2423            sign extend. */
2424 #if defined(SIZEOF_BLKCNT_T_8)
2425         result = (uint64_t)STAT_ST_BLOCKSIZE * (uint64_t)sbuf->st_ex_blocks;
2426 #elif defined(SIZEOF_BLKCNT_T_4)
2427         {
2428                 uint64_t bs = ((uint64_t)sbuf->st_ex_blocks) & 0xFFFFFFFFLL;
2429                 result = (uint64_t)STAT_ST_BLOCKSIZE * bs;
2430         }
2431 #else
2432 #error SIZEOF_BLKCNT_T_NOT_A_SUPPORTED_VALUE
2433 #endif
2434         if (result == 0) {
2435                 /*
2436                  * Some file systems do not allocate a block for very
2437                  * small files. But for non-empty file should report a
2438                  * positive size.
2439                  */
2440
2441                 uint64_t filesize = get_file_size_stat(sbuf);
2442                 if (filesize > 0) {
2443                         result = MIN((uint64_t)STAT_ST_BLOCKSIZE, filesize);
2444                 }
2445         }
2446 #else
2447         result = get_file_size_stat(sbuf);
2448 #endif
2449
2450         if (fsp && fsp->initial_allocation_size)
2451                 result = MAX(result,fsp->initial_allocation_size);
2452
2453         result = smb_roundup(handle->conn, result);
2454
2455  out:
2456         END_PROFILE(syscall_get_alloc_size);
2457         return result;
2458 }
2459
2460 static int vfswrap_unlinkat(vfs_handle_struct *handle,
2461                         struct files_struct *dirfsp,
2462                         const struct smb_filename *smb_fname,
2463                         int flags)
2464 {
2465         int result = -1;
2466
2467         START_PROFILE(syscall_unlinkat);
2468
2469         if (is_named_stream(smb_fname)) {
2470                 errno = ENOENT;
2471                 goto out;
2472         }
2473         result = unlinkat(fsp_get_pathref_fd(dirfsp),
2474                         smb_fname->base_name,
2475                         flags);
2476
2477  out:
2478         END_PROFILE(syscall_unlinkat);
2479         return result;
2480 }
2481
2482 static int vfswrap_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
2483 {
2484         int result;
2485
2486         START_PROFILE(syscall_fchmod);
2487
2488         if (!fsp->fsp_flags.is_pathref) {
2489                 result = fchmod(fsp_get_io_fd(fsp), mode);
2490                 END_PROFILE(syscall_fchmod);
2491                 return result;
2492         }
2493
2494         if (fsp->fsp_flags.have_proc_fds) {
2495                 int fd = fsp_get_pathref_fd(fsp);
2496                 const char *p = NULL;
2497                 char buf[PATH_MAX];
2498
2499                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
2500                 if (p != NULL) {
2501                         result = chmod(p, mode);
2502                 } else {
2503                         result = -1;
2504                 }
2505                 END_PROFILE(syscall_fchmod);
2506                 return result;
2507         }
2508
2509         /*
2510          * This is no longer a handle based call.
2511          */
2512         result = chmod(fsp->fsp_name->base_name, mode);
2513
2514         END_PROFILE(syscall_fchmod);
2515         return result;
2516 }
2517
2518 static int vfswrap_fchown(vfs_handle_struct *handle, files_struct *fsp, uid_t uid, gid_t gid)
2519 {
2520 #ifdef HAVE_FCHOWN
2521         int result;
2522
2523         START_PROFILE(syscall_fchown);
2524         if (!fsp->fsp_flags.is_pathref) {
2525                 result = fchown(fsp_get_io_fd(fsp), uid, gid);
2526                 END_PROFILE(syscall_fchown);
2527                 return result;
2528         }
2529
2530         if (fsp->fsp_flags.have_proc_fds) {
2531                 int fd = fsp_get_pathref_fd(fsp);
2532                 const char *p = NULL;
2533                 char buf[PATH_MAX];
2534
2535                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
2536                 if (p != NULL) {
2537                         result = chown(p, uid, gid);
2538                 } else {
2539                         result = -1;
2540                 }
2541                 END_PROFILE(syscall_fchown);
2542                 return result;
2543         }
2544
2545         /*
2546          * This is no longer a handle based call.
2547          */
2548         result = chown(fsp->fsp_name->base_name, uid, gid);
2549         END_PROFILE(syscall_fchown);
2550         return result;
2551 #else
2552         errno = ENOSYS;
2553         return -1;
2554 #endif
2555 }
2556
2557 static int vfswrap_lchown(vfs_handle_struct *handle,
2558                         const struct smb_filename *smb_fname,
2559                         uid_t uid,
2560                         gid_t gid)
2561 {
2562         int result;
2563
2564         START_PROFILE(syscall_lchown);
2565         result = lchown(smb_fname->base_name, uid, gid);
2566         END_PROFILE(syscall_lchown);
2567         return result;
2568 }
2569
2570 static int vfswrap_chdir(vfs_handle_struct *handle,
2571                         const struct smb_filename *smb_fname)
2572 {
2573         int result;
2574
2575         START_PROFILE(syscall_chdir);
2576         result = chdir(smb_fname->base_name);
2577         END_PROFILE(syscall_chdir);
2578         return result;
2579 }
2580
2581 static struct smb_filename *vfswrap_getwd(vfs_handle_struct *handle,
2582                                 TALLOC_CTX *ctx)
2583 {
2584         char *result;
2585         struct smb_filename *smb_fname = NULL;
2586
2587         START_PROFILE(syscall_getwd);
2588         result = sys_getwd();
2589         END_PROFILE(syscall_getwd);
2590
2591         if (result == NULL) {
2592                 return NULL;
2593         }
2594         smb_fname = synthetic_smb_fname(ctx,
2595                                 result,
2596                                 NULL,
2597                                 NULL,
2598                                 0,
2599                                 0);
2600         /*
2601          * sys_getwd() *always* returns malloced memory.
2602          * We must free here to avoid leaks:
2603          * BUG:https://bugzilla.samba.org/show_bug.cgi?id=13372
2604          */
2605         SAFE_FREE(result);
2606         return smb_fname;
2607 }
2608
2609 /*********************************************************************
2610  nsec timestamp resolution call. Convert down to whatever the underlying
2611  system will support.
2612 **********************************************************************/
2613
2614 static int vfswrap_fntimes(vfs_handle_struct *handle,
2615                            files_struct *fsp,
2616                            struct smb_file_time *ft)
2617 {
2618         int result = -1;
2619         struct timespec ts[2];
2620         struct timespec *times = NULL;
2621
2622         START_PROFILE(syscall_fntimes);
2623
2624         if (is_named_stream(fsp->fsp_name)) {
2625                 errno = ENOENT;
2626                 goto out;
2627         }
2628
2629         if (ft != NULL) {
2630                 if (is_omit_timespec(&ft->atime)) {
2631                         ft->atime = fsp->fsp_name->st.st_ex_atime;
2632                 }
2633
2634                 if (is_omit_timespec(&ft->mtime)) {
2635                         ft->mtime = fsp->fsp_name->st.st_ex_mtime;
2636                 }
2637
2638                 if (!is_omit_timespec(&ft->create_time)) {
2639                         set_create_timespec_ea(fsp,
2640                                                ft->create_time);
2641                 }
2642
2643                 if ((timespec_compare(&ft->atime,
2644                                       &fsp->fsp_name->st.st_ex_atime) == 0) &&
2645                     (timespec_compare(&ft->mtime,
2646                                       &fsp->fsp_name->st.st_ex_mtime) == 0)) {
2647                         result = 0;
2648                         goto out;
2649                 }
2650
2651                 ts[0] = ft->atime;
2652                 ts[1] = ft->mtime;
2653                 times = ts;
2654         } else {
2655                 times = NULL;
2656         }
2657
2658         if (!fsp->fsp_flags.is_pathref) {
2659                 result = futimens(fsp_get_io_fd(fsp), times);
2660                 goto out;
2661         }
2662
2663         if (fsp->fsp_flags.have_proc_fds) {
2664                 int fd = fsp_get_pathref_fd(fsp);
2665                 const char *p = NULL;
2666                 char buf[PATH_MAX];
2667
2668                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
2669                 if (p != NULL) {
2670                         /*
2671                          * The dirfd argument of utimensat is ignored when
2672                          * pathname is an absolute path
2673                          */
2674                         result = utimensat(AT_FDCWD, p, times, 0);
2675                 } else {
2676                         result = -1;
2677                 }
2678
2679                 goto out;
2680         }
2681
2682         /*
2683          * The fd is a pathref (opened with O_PATH) and there isn't fd to
2684          * path translation mechanism. Fallback to path based call.
2685          */
2686         result = utimensat(AT_FDCWD, fsp->fsp_name->base_name, times, 0);
2687
2688 out:
2689         END_PROFILE(syscall_fntimes);
2690
2691         return result;
2692 }
2693
2694
2695 /*********************************************************************
2696  A version of ftruncate that will write the space on disk if strict
2697  allocate is set.
2698 **********************************************************************/
2699
2700 static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
2701 {
2702         off_t space_to_write;
2703         uint64_t space_avail;
2704         uint64_t bsize,dfree,dsize;
2705         int ret;
2706         NTSTATUS status;
2707         SMB_STRUCT_STAT *pst;
2708         bool ok;
2709
2710         ok = vfs_valid_pwrite_range(len, 0);
2711         if (!ok) {
2712                 errno = EINVAL;
2713                 return -1;
2714         }
2715
2716         status = vfs_stat_fsp(fsp);
2717         if (!NT_STATUS_IS_OK(status)) {
2718                 return -1;
2719         }
2720         pst = &fsp->fsp_name->st;
2721
2722 #ifdef S_ISFIFO
2723         if (S_ISFIFO(pst->st_ex_mode))
2724                 return 0;
2725 #endif
2726
2727         if (pst->st_ex_size == len)
2728                 return 0;
2729
2730         /* Shrink - just ftruncate. */
2731         if (pst->st_ex_size > len)
2732                 return ftruncate(fsp_get_io_fd(fsp), len);
2733
2734         space_to_write = len - pst->st_ex_size;
2735
2736         /* for allocation try fallocate first. This can fail on some
2737            platforms e.g. when the filesystem doesn't support it and no
2738            emulation is being done by the libc (like on AIX with JFS1). In that
2739            case we do our own emulation. fallocate implementations can
2740            return ENOTSUP or EINVAL in cases like that. */
2741         ret = SMB_VFS_FALLOCATE(fsp, 0, pst->st_ex_size, space_to_write);
2742         if (ret == -1 && errno == ENOSPC) {
2743                 return -1;
2744         }
2745         if (ret == 0) {
2746                 return 0;
2747         }
2748         DEBUG(10,("strict_allocate_ftruncate: SMB_VFS_FALLOCATE failed with "
2749                 "error %d. Falling back to slow manual allocation\n", errno));
2750
2751         /* available disk space is enough or not? */
2752         space_avail =
2753             get_dfree_info(fsp->conn, fsp->fsp_name, &bsize, &dfree, &dsize);
2754         /* space_avail is 1k blocks */
2755         if (space_avail == (uint64_t)-1 ||
2756                         ((uint64_t)space_to_write/1024 > space_avail) ) {
2757                 errno = ENOSPC;
2758                 return -1;
2759         }
2760
2761         /* Write out the real space on disk. */
2762         ret = vfs_slow_fallocate(fsp, pst->st_ex_size, space_to_write);
2763         if (ret != 0) {
2764                 return -1;
2765         }
2766
2767         return 0;
2768 }
2769
2770 static int vfswrap_ftruncate(vfs_handle_struct *handle, files_struct *fsp, off_t len)
2771 {
2772         int result = -1;
2773         SMB_STRUCT_STAT *pst;
2774         NTSTATUS status;
2775         char c = 0;
2776
2777         START_PROFILE(syscall_ftruncate);
2778
2779         if (lp_strict_allocate(SNUM(fsp->conn)) && !fsp->fsp_flags.is_sparse) {
2780                 result = strict_allocate_ftruncate(handle, fsp, len);
2781                 END_PROFILE(syscall_ftruncate);
2782                 return result;
2783         }
2784
2785         /* we used to just check HAVE_FTRUNCATE_EXTEND and only use
2786            ftruncate if the system supports it. Then I discovered that
2787            you can have some filesystems that support ftruncate
2788            expansion and some that don't! On Linux fat can't do
2789            ftruncate extend but ext2 can. */
2790
2791         result = ftruncate(fsp_get_io_fd(fsp), len);
2792
2793         /* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
2794            extend a file with ftruncate. Provide alternate implementation
2795            for this */
2796
2797         /* Do an fstat to see if the file is longer than the requested
2798            size in which case the ftruncate above should have
2799            succeeded or shorter, in which case seek to len - 1 and
2800            write 1 byte of zero */
2801         status = vfs_stat_fsp(fsp);
2802         if (!NT_STATUS_IS_OK(status)) {
2803                 goto done;
2804         }
2805
2806         /* We need to update the files_struct after successful ftruncate */
2807         if (result == 0) {
2808                 goto done;
2809         }
2810
2811         pst = &fsp->fsp_name->st;
2812
2813 #ifdef S_ISFIFO
2814         if (S_ISFIFO(pst->st_ex_mode)) {
2815                 result = 0;
2816                 goto done;
2817         }
2818 #endif
2819
2820         if (pst->st_ex_size == len) {
2821                 result = 0;
2822                 goto done;
2823         }
2824
2825         if (pst->st_ex_size > len) {
2826                 /* the ftruncate should have worked */
2827                 goto done;
2828         }
2829
2830         if (SMB_VFS_PWRITE(fsp, &c, 1, len-1)!=1) {
2831                 goto done;
2832         }
2833
2834         result = 0;
2835
2836   done:
2837
2838         END_PROFILE(syscall_ftruncate);
2839         return result;
2840 }
2841
2842 static int vfswrap_fallocate(vfs_handle_struct *handle,
2843                         files_struct *fsp,
2844                         uint32_t mode,
2845                         off_t offset,
2846                         off_t len)
2847 {
2848         int result;
2849
2850         START_PROFILE(syscall_fallocate);
2851         if (mode == 0) {
2852                 result = sys_posix_fallocate(fsp_get_io_fd(fsp), offset, len);
2853                 /*
2854                  * posix_fallocate returns 0 on success, errno on error
2855                  * and doesn't set errno. Make it behave like fallocate()
2856                  * which returns -1, and sets errno on failure.
2857                  */
2858                 if (result != 0) {
2859                         errno = result;
2860                         result = -1;
2861                 }
2862         } else {
2863                 /* sys_fallocate handles filtering of unsupported mode flags */
2864                 result = sys_fallocate(fsp_get_io_fd(fsp), mode, offset, len);
2865         }
2866         END_PROFILE(syscall_fallocate);
2867         return result;
2868 }
2869
2870 static bool vfswrap_lock(vfs_handle_struct *handle, files_struct *fsp, int op, off_t offset, off_t count, int type)
2871 {
2872         bool result;
2873
2874         START_PROFILE(syscall_fcntl_lock);
2875
2876         if (fsp->fsp_flags.use_ofd_locks) {
2877                 op = map_process_lock_to_ofd_lock(op);
2878         }
2879
2880         result =  fcntl_lock(fsp_get_io_fd(fsp), op, offset, count, type);
2881         END_PROFILE(syscall_fcntl_lock);
2882         return result;
2883 }
2884
2885 static int vfswrap_kernel_flock(vfs_handle_struct *handle, files_struct *fsp,
2886                                 uint32_t share_access, uint32_t access_mask)
2887 {
2888         START_PROFILE(syscall_kernel_flock);
2889         kernel_flock(fsp_get_io_fd(fsp), share_access, access_mask);
2890         END_PROFILE(syscall_kernel_flock);
2891         return 0;
2892 }
2893
2894 static int vfswrap_fcntl(vfs_handle_struct *handle, files_struct *fsp, int cmd,
2895                          va_list cmd_arg)
2896 {
2897         void *argp;
2898         va_list dup_cmd_arg;
2899         int result;
2900         int val;
2901
2902         START_PROFILE(syscall_fcntl);
2903
2904         va_copy(dup_cmd_arg, cmd_arg);
2905
2906         switch(cmd) {
2907         case F_SETLK:
2908         case F_SETLKW:
2909         case F_GETLK:
2910 #if defined(HAVE_OFD_LOCKS)
2911         case F_OFD_SETLK:
2912         case F_OFD_SETLKW:
2913         case F_OFD_GETLK:
2914 #endif
2915 #if defined(HAVE_F_OWNER_EX)
2916         case F_GETOWN_EX:
2917         case F_SETOWN_EX:
2918 #endif
2919 #if defined(HAVE_RW_HINTS)
2920         case F_GET_RW_HINT:
2921         case F_SET_RW_HINT:
2922         case F_GET_FILE_RW_HINT:
2923         case F_SET_FILE_RW_HINT:
2924 #endif
2925                 argp = va_arg(dup_cmd_arg, void *);
2926                 result = sys_fcntl_ptr(fsp_get_io_fd(fsp), cmd, argp);
2927                 break;
2928         default:
2929                 val = va_arg(dup_cmd_arg, int);
2930                 result = sys_fcntl_int(fsp_get_io_fd(fsp), cmd, val);
2931         }
2932
2933         va_end(dup_cmd_arg);
2934
2935         END_PROFILE(syscall_fcntl);
2936         return result;
2937 }
2938
2939 static bool vfswrap_getlock(vfs_handle_struct *handle, files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid)
2940 {
2941         bool result;
2942         int op = F_GETLK;
2943
2944         START_PROFILE(syscall_fcntl_getlock);
2945
2946         if (fsp->fsp_flags.use_ofd_locks) {
2947                 op = map_process_lock_to_ofd_lock(op);
2948         }
2949
2950         result = fcntl_getlock(fsp_get_io_fd(fsp), op, poffset, pcount, ptype, ppid);
2951         END_PROFILE(syscall_fcntl_getlock);
2952         return result;
2953 }
2954
2955 static int vfswrap_linux_setlease(vfs_handle_struct *handle, files_struct *fsp,
2956                                 int leasetype)
2957 {
2958         int result = -1;
2959
2960         START_PROFILE(syscall_linux_setlease);
2961
2962 #ifdef HAVE_KERNEL_OPLOCKS_LINUX
2963         result = linux_setlease(fsp_get_io_fd(fsp), leasetype);
2964 #else
2965         errno = ENOSYS;
2966 #endif
2967         END_PROFILE(syscall_linux_setlease);
2968         return result;
2969 }
2970
2971 static int vfswrap_symlinkat(vfs_handle_struct *handle,
2972                         const struct smb_filename *link_target,
2973                         struct files_struct *dirfsp,
2974                         const struct smb_filename *new_smb_fname)
2975 {
2976         int result;
2977
2978         START_PROFILE(syscall_symlinkat);
2979
2980         result = symlinkat(link_target->base_name,
2981                         fsp_get_pathref_fd(dirfsp),
2982                         new_smb_fname->base_name);
2983         END_PROFILE(syscall_symlinkat);
2984         return result;
2985 }
2986
2987 static int vfswrap_readlinkat(vfs_handle_struct *handle,
2988                         const struct files_struct *dirfsp,
2989                         const struct smb_filename *smb_fname,
2990                         char *buf,
2991                         size_t bufsiz)
2992 {
2993         int result;
2994
2995         START_PROFILE(syscall_readlinkat);
2996
2997         result = readlinkat(fsp_get_pathref_fd(dirfsp),
2998                         smb_fname->base_name,
2999                         buf,
3000                         bufsiz);
3001
3002         END_PROFILE(syscall_readlinkat);
3003         return result;
3004 }
3005
3006 static int vfswrap_linkat(vfs_handle_struct *handle,
3007                         files_struct *srcfsp,
3008                         const struct smb_filename *old_smb_fname,
3009                         files_struct *dstfsp,
3010                         const struct smb_filename *new_smb_fname,
3011                         int flags)
3012 {
3013         int result;
3014
3015         START_PROFILE(syscall_linkat);
3016
3017         result = linkat(fsp_get_pathref_fd(srcfsp),
3018                         old_smb_fname->base_name,
3019                         fsp_get_pathref_fd(dstfsp),
3020                         new_smb_fname->base_name,
3021                         flags);
3022
3023         END_PROFILE(syscall_linkat);
3024         return result;
3025 }
3026
3027 static int vfswrap_mknodat(vfs_handle_struct *handle,
3028                         files_struct *dirfsp,
3029                         const struct smb_filename *smb_fname,
3030                         mode_t mode,
3031                         SMB_DEV_T dev)
3032 {
3033         int result;
3034
3035         START_PROFILE(syscall_mknodat);
3036
3037         result = sys_mknodat(fsp_get_pathref_fd(dirfsp),
3038                         smb_fname->base_name,
3039                         mode,
3040                         dev);
3041
3042         END_PROFILE(syscall_mknodat);
3043         return result;
3044 }
3045
3046 static struct smb_filename *vfswrap_realpath(vfs_handle_struct *handle,
3047                         TALLOC_CTX *ctx,
3048                         const struct smb_filename *smb_fname)
3049 {
3050         char *result;
3051         struct smb_filename *result_fname = NULL;
3052
3053         START_PROFILE(syscall_realpath);
3054         result = sys_realpath(smb_fname->base_name);
3055         END_PROFILE(syscall_realpath);
3056         if (result) {
3057                 result_fname = synthetic_smb_fname(ctx,
3058                                                    result,
3059                                                    NULL,
3060                                                    NULL,
3061                                                    0,
3062                                                    0);
3063                 SAFE_FREE(result);
3064         }
3065         return result_fname;
3066 }
3067
3068 static int vfswrap_chflags(vfs_handle_struct *handle,
3069                         const struct smb_filename *smb_fname,
3070                         unsigned int flags)
3071 {
3072 #ifdef HAVE_CHFLAGS
3073         return chflags(smb_fname->base_name, flags);
3074 #else
3075         errno = ENOSYS;
3076         return -1;
3077 #endif
3078 }
3079
3080 static struct file_id vfswrap_file_id_create(struct vfs_handle_struct *handle,
3081                                              const SMB_STRUCT_STAT *sbuf)
3082 {
3083         struct file_id key;
3084
3085         /* the ZERO_STRUCT ensures padding doesn't break using the key as a
3086          * blob */
3087         ZERO_STRUCT(key);
3088
3089         key.devid = sbuf->st_ex_dev;
3090         key.inode = sbuf->st_ex_ino;
3091         /* key.extid is unused by default. */
3092
3093         return key;
3094 }
3095
3096 static uint64_t vfswrap_fs_file_id(struct vfs_handle_struct *handle,
3097                                    const SMB_STRUCT_STAT *psbuf)
3098 {
3099         uint64_t file_id;
3100
3101         if (!(psbuf->st_ex_iflags & ST_EX_IFLAG_CALCULATED_FILE_ID)) {
3102                 return psbuf->st_ex_file_id;
3103         }
3104
3105         if (handle->conn->base_share_dev == psbuf->st_ex_dev) {
3106                 return (uint64_t)psbuf->st_ex_ino;
3107         }
3108
3109         /* FileIDLow */
3110         file_id = ((psbuf->st_ex_ino) & UINT32_MAX);
3111
3112         /* FileIDHigh */
3113         file_id |= ((uint64_t)((psbuf->st_ex_dev) & UINT32_MAX)) << 32;
3114
3115         return file_id;
3116 }
3117
3118 static NTSTATUS vfswrap_fstreaminfo(vfs_handle_struct *handle,
3119                                    struct files_struct *fsp,
3120                                    TALLOC_CTX *mem_ctx,
3121                                    unsigned int *pnum_streams,
3122                                    struct stream_struct **pstreams)
3123 {
3124         struct stream_struct *tmp_streams = NULL;
3125         unsigned int num_streams = *pnum_streams;
3126         struct stream_struct *streams = *pstreams;
3127         NTSTATUS status;
3128
3129         if (fsp->fsp_flags.is_directory) {
3130                 /*
3131                  * No default streams on directories
3132                  */
3133                 goto done;
3134         }
3135         status = vfs_stat_fsp(fsp);
3136         if (!NT_STATUS_IS_OK(status)) {
3137                 return status;
3138         }
3139
3140         if (num_streams + 1 < 1) {
3141                 /* Integer wrap. */
3142                 return NT_STATUS_INVALID_PARAMETER;
3143         }
3144
3145         tmp_streams = talloc_realloc(mem_ctx,
3146                                         streams,
3147                                         struct stream_struct,
3148                                         num_streams + 1);
3149         if (tmp_streams == NULL) {
3150                 return NT_STATUS_NO_MEMORY;
3151         }
3152         tmp_streams[num_streams].name = talloc_strdup(tmp_streams, "::$DATA");
3153         if (tmp_streams[num_streams].name == NULL) {
3154                 return NT_STATUS_NO_MEMORY;
3155         }
3156         tmp_streams[num_streams].size = fsp->fsp_name->st.st_ex_size;
3157         tmp_streams[num_streams].alloc_size = SMB_VFS_GET_ALLOC_SIZE(
3158                                                 handle->conn,
3159                                                 fsp,
3160                                                 &fsp->fsp_name->st);
3161         num_streams += 1;
3162
3163         *pnum_streams = num_streams;
3164         *pstreams = tmp_streams;
3165  done:
3166         return NT_STATUS_OK;
3167 }
3168
3169 static int vfswrap_get_real_filename(struct vfs_handle_struct *handle,
3170                                      const struct smb_filename *path,
3171                                      const char *name,
3172                                      TALLOC_CTX *mem_ctx,
3173                                      char **found_name)
3174 {
3175         /*
3176          * Don't fall back to get_real_filename so callers can differentiate
3177          * between a full directory scan and an actual case-insensitive stat.
3178          */
3179         errno = EOPNOTSUPP;
3180         return -1;
3181 }
3182
3183 static const char *vfswrap_connectpath(struct vfs_handle_struct *handle,
3184                                    const struct smb_filename *smb_fname)
3185 {
3186         return handle->conn->connectpath;
3187 }
3188
3189 static NTSTATUS vfswrap_brl_lock_windows(struct vfs_handle_struct *handle,
3190                                          struct byte_range_lock *br_lck,
3191                                          struct lock_struct *plock)
3192 {
3193         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
3194
3195         /* Note: blr is not used in the default implementation. */
3196         return brl_lock_windows_default(br_lck, plock);
3197 }
3198
3199 static bool vfswrap_brl_unlock_windows(struct vfs_handle_struct *handle,
3200                                        struct byte_range_lock *br_lck,
3201                                        const struct lock_struct *plock)
3202 {
3203         SMB_ASSERT(plock->lock_flav == WINDOWS_LOCK);
3204
3205         return brl_unlock_windows_default(br_lck, plock);
3206 }
3207
3208 static bool vfswrap_strict_lock_check(struct vfs_handle_struct *handle,
3209                                       files_struct *fsp,
3210                                       struct lock_struct *plock)
3211 {
3212         SMB_ASSERT(plock->lock_type == READ_LOCK ||
3213             plock->lock_type == WRITE_LOCK);
3214
3215         return strict_lock_check_default(fsp, plock);
3216 }
3217
3218 /* NT ACL operations. */
3219
3220 static NTSTATUS vfswrap_fget_nt_acl(vfs_handle_struct *handle,
3221                                     files_struct *fsp,
3222                                     uint32_t security_info,
3223                                     TALLOC_CTX *mem_ctx,
3224                                     struct security_descriptor **ppdesc)
3225 {
3226         NTSTATUS result;
3227
3228         START_PROFILE(fget_nt_acl);
3229         result = posix_fget_nt_acl(fsp, security_info,
3230                                    mem_ctx, ppdesc);
3231         END_PROFILE(fget_nt_acl);
3232         return result;
3233 }
3234
3235 static NTSTATUS vfswrap_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd)
3236 {
3237         NTSTATUS result;
3238
3239         START_PROFILE(fset_nt_acl);
3240         result = set_nt_acl(fsp, security_info_sent, psd);
3241         END_PROFILE(fset_nt_acl);
3242         return result;
3243 }
3244
3245 static NTSTATUS vfswrap_audit_file(struct vfs_handle_struct *handle,
3246                                    struct smb_filename *file,
3247                                    struct security_acl *sacl,
3248                                    uint32_t access_requested,
3249                                    uint32_t access_denied)
3250 {
3251         return NT_STATUS_OK; /* Nothing to do here ... */
3252 }
3253
3254 static SMB_ACL_T vfswrap_sys_acl_get_fd(vfs_handle_struct *handle,
3255                                         files_struct *fsp,
3256                                         SMB_ACL_TYPE_T type,
3257                                         TALLOC_CTX *mem_ctx)
3258 {
3259         return sys_acl_get_fd(handle, fsp, type, mem_ctx);
3260 }
3261
3262 static int vfswrap_sys_acl_set_fd(vfs_handle_struct *handle,
3263                                   files_struct *fsp,
3264                                   SMB_ACL_TYPE_T type,
3265                                   SMB_ACL_T theacl)
3266 {
3267         return sys_acl_set_fd(handle, fsp, type, theacl);
3268 }
3269
3270 static int vfswrap_sys_acl_delete_def_fd(vfs_handle_struct *handle,
3271                                          files_struct *fsp)
3272 {
3273         return sys_acl_delete_def_fd(handle, fsp);
3274 }
3275
3276 /****************************************************************
3277  Extended attribute operations.
3278 *****************************************************************/
3279
3280 static ssize_t vfswrap_getxattr(struct vfs_handle_struct *handle,
3281                         const struct smb_filename *smb_fname,
3282                         const char *name,
3283                         void *value,
3284                         size_t size)
3285 {
3286         return getxattr(smb_fname->base_name, name, value, size);
3287 }
3288
3289 struct vfswrap_getxattrat_state {
3290         struct tevent_context *ev;
3291         files_struct *dir_fsp;
3292         const struct smb_filename *smb_fname;
3293
3294         /*
3295          * The following variables are talloced off "state" which is protected
3296          * by a destructor and thus are guaranteed to be safe to be used in the
3297          * job function in the worker thread.
3298          */
3299         char *name;
3300         const char *xattr_name;
3301         uint8_t *xattr_value;
3302         struct security_unix_token *token;
3303
3304         ssize_t xattr_size;
3305         struct vfs_aio_state vfs_aio_state;
3306         SMBPROFILE_BYTES_ASYNC_STATE(profile_bytes);
3307 };
3308
3309 static int vfswrap_getxattrat_state_destructor(
3310                 struct vfswrap_getxattrat_state *state)
3311 {
3312         return -1;
3313 }
3314
3315 static void vfswrap_getxattrat_do_sync(struct tevent_req *req);
3316 static void vfswrap_getxattrat_do_async(void *private_data);
3317 static void vfswrap_getxattrat_done(struct tevent_req *subreq);
3318
3319 static struct tevent_req *vfswrap_getxattrat_send(
3320                         TALLOC_CTX *mem_ctx,
3321                         struct tevent_context *ev,
3322                         struct vfs_handle_struct *handle,
3323                         files_struct *dir_fsp,
3324                         const struct smb_filename *smb_fname,
3325                         const char *xattr_name,
3326                         size_t alloc_hint)
3327 {
3328         struct tevent_req *req = NULL;
3329         struct tevent_req *subreq = NULL;
3330         struct vfswrap_getxattrat_state *state = NULL;
3331         size_t max_threads = 0;
3332         bool have_per_thread_cwd = false;
3333         bool have_per_thread_creds = false;
3334         bool do_async = false;
3335
3336         req = tevent_req_create(mem_ctx, &state,
3337                                 struct vfswrap_getxattrat_state);
3338         if (req == NULL) {
3339                 return NULL;
3340         }
3341         *state = (struct vfswrap_getxattrat_state) {
3342                 .ev = ev,
3343                 .dir_fsp = dir_fsp,
3344                 .smb_fname = smb_fname,
3345         };
3346
3347         max_threads = pthreadpool_tevent_max_threads(dir_fsp->conn->sconn->pool);
3348         if (max_threads >= 1) {
3349                 /*
3350                  * We need a non sync threadpool!
3351                  */
3352                 have_per_thread_cwd = per_thread_cwd_supported();
3353         }
3354 #ifdef HAVE_LINUX_THREAD_CREDENTIALS
3355         have_per_thread_creds = true;
3356 #endif
3357         if (have_per_thread_cwd && have_per_thread_creds) {
3358                 do_async = true;
3359         }
3360
3361         SMBPROFILE_BYTES_ASYNC_START(syscall_asys_getxattrat, profile_p,
3362                                      state->profile_bytes, 0);
3363
3364         if (fsp_get_pathref_fd(dir_fsp) == -1) {
3365                 DBG_ERR("Need a valid directory fd\n");
3366                 tevent_req_error(req, EINVAL);
3367                 return tevent_req_post(req, ev);
3368         }
3369
3370         if (alloc_hint > 0) {
3371                 state->xattr_value = talloc_zero_array(state,
3372                                                        uint8_t,
3373                                                        alloc_hint);
3374                 if (tevent_req_nomem(state->xattr_value, req)) {
3375                         return tevent_req_post(req, ev);
3376                 }
3377         }
3378
3379         if (!do_async) {
3380                 vfswrap_getxattrat_do_sync(req);
3381                 return tevent_req_post(req, ev);
3382         }
3383
3384         /*
3385          * Now allocate all parameters from a memory context that won't go away
3386          * no matter what. These paremeters will get used in threads and we
3387          * can't reliably cancel threads, so all buffers passed to the threads
3388          * must not be freed before all referencing threads terminate.
3389          */
3390
3391         state->name = talloc_strdup(state, smb_fname->base_name);
3392         if (tevent_req_nomem(state->name, req)) {
3393                 return tevent_req_post(req, ev);
3394         }
3395
3396         state->xattr_name = talloc_strdup(state, xattr_name);
3397         if (tevent_req_nomem(state->xattr_name, req)) {
3398                 return tevent_req_post(req, ev);
3399         }
3400
3401         /*
3402          * This is a hot codepath so at first glance one might think we should
3403          * somehow optimize away the token allocation and do a
3404          * talloc_reference() or similar black magic instead. But due to the
3405          * talloc_stackframe pool per SMB2 request this should be a simple copy
3406          * without a malloc in most cases.
3407          */
3408         if (geteuid() == sec_initial_uid()) {
3409                 state->token = root_unix_token(state);
3410         } else {
3411                 state->token = copy_unix_token(
3412                                         state,
3413                                         dir_fsp->conn->session_info->unix_token);
3414         }
3415         if (tevent_req_nomem(state->token, req)) {
3416                 return tevent_req_post(req, ev);
3417         }
3418
3419         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
3420
3421         subreq = pthreadpool_tevent_job_send(
3422                         state,
3423                         ev,
3424                         dir_fsp->conn->sconn->pool,
3425                         vfswrap_getxattrat_do_async,
3426                         state);
3427         if (tevent_req_nomem(subreq, req)) {
3428                 return tevent_req_post(req, ev);
3429         }
3430         tevent_req_set_callback(subreq, vfswrap_getxattrat_done, req);
3431
3432         talloc_set_destructor(state, vfswrap_getxattrat_state_destructor);
3433
3434         return req;
3435 }
3436
3437 static void vfswrap_getxattrat_do_sync(struct tevent_req *req)
3438 {
3439         struct vfswrap_getxattrat_state *state = tevent_req_data(
3440                 req, struct vfswrap_getxattrat_state);
3441         char *path = NULL;
3442         char *tofree = NULL;
3443         char pathbuf[PATH_MAX+1];
3444         ssize_t pathlen;
3445         int err;
3446
3447         pathlen = full_path_tos(state->dir_fsp->fsp_name->base_name,
3448                                 state->smb_fname->base_name,
3449                                 pathbuf,
3450                                 sizeof(pathbuf),
3451                                 &path,
3452                                 &tofree);
3453         if (pathlen == -1) {
3454                 tevent_req_error(req, ENOMEM);
3455                 return;
3456         }
3457
3458         state->xattr_size = getxattr(path,
3459                                      state->xattr_name,
3460                                      state->xattr_value,
3461                                      talloc_array_length(state->xattr_value));
3462         err = errno;
3463         TALLOC_FREE(tofree);
3464         if (state->xattr_size == -1) {
3465                 tevent_req_error(req, err);
3466                 return;
3467         }
3468
3469         tevent_req_done(req);
3470         return;
3471 }
3472
3473 static void vfswrap_getxattrat_do_async(void *private_data)
3474 {
3475         struct vfswrap_getxattrat_state *state = talloc_get_type_abort(
3476                 private_data, struct vfswrap_getxattrat_state);
3477         struct timespec start_time;
3478         struct timespec end_time;
3479         int ret;
3480
3481         PROFILE_TIMESTAMP(&start_time);
3482         SMBPROFILE_BYTES_ASYNC_SET_BUSY(state->profile_bytes);
3483
3484         /*
3485          * Here we simulate a getxattrat()
3486          * call using fchdir();getxattr()
3487          */
3488
3489         per_thread_cwd_activate();
3490
3491         /* Become the correct credential on this thread. */
3492         ret = set_thread_credentials(state->token->uid,
3493                                      state->token->gid,
3494                                      (size_t)state->token->ngroups,
3495                                      state->token->groups);
3496         if (ret != 0) {
3497                 state->xattr_size = -1;
3498                 state->vfs_aio_state.error = errno;
3499                 goto end_profile;
3500         }
3501
3502         ret = fchdir(fsp_get_pathref_fd(state->dir_fsp));
3503         if (ret == -1) {
3504                 state->xattr_size = -1;
3505                 state->vfs_aio_state.error = errno;
3506                 goto end_profile;
3507         }
3508
3509         state->xattr_size = getxattr(state->name,
3510                                      state->xattr_name,
3511                                      state->xattr_value,
3512                                      talloc_array_length(state->xattr_value));
3513         if (state->xattr_size == -1) {
3514                 state->vfs_aio_state.error = errno;
3515         }
3516
3517 end_profile:
3518         PROFILE_TIMESTAMP(&end_time);
3519         state->vfs_aio_state.duration = nsec_time_diff(&end_time, &start_time);
3520         SMBPROFILE_BYTES_ASYNC_SET_IDLE(state->profile_bytes);
3521 }
3522
3523 static void vfswrap_getxattrat_done(struct tevent_req *subreq)
3524 {
3525         struct tevent_req *req = tevent_req_callback_data(
3526                 subreq, struct tevent_req);
3527         struct vfswrap_getxattrat_state *state = tevent_req_data(
3528                 req, struct vfswrap_getxattrat_state);
3529         int ret;
3530         bool ok;
3531
3532         /*
3533          * Make sure we run as the user again
3534          */
3535         ok = change_to_user_and_service_by_fsp(state->dir_fsp);
3536         SMB_ASSERT(ok);
3537
3538         ret = pthreadpool_tevent_job_recv(subreq);
3539         TALLOC_FREE(subreq);
3540         SMBPROFILE_BYTES_ASYNC_END(state->profile_bytes);
3541         talloc_set_destructor(state, NULL);
3542         if (ret != 0) {
3543                 if (ret != EAGAIN) {
3544                         tevent_req_error(req, ret);
3545                         return;
3546                 }
3547                 /*
3548                  * If we get EAGAIN from pthreadpool_tevent_job_recv() this
3549                  * means the lower level pthreadpool failed to create a new
3550                  * thread. Fallback to sync processing in that case to allow
3551                  * some progress for the client.
3552                  */
3553                 vfswrap_getxattrat_do_sync(req);
3554                 return;
3555         }
3556
3557         if (state->xattr_size == -1) {
3558                 tevent_req_error(req, state->vfs_aio_state.error);
3559                 return;
3560         }
3561
3562         if (state->xattr_value == NULL) {
3563                 /*
3564                  * The caller only wanted the size.
3565                  */
3566                 tevent_req_done(req);
3567                 return;
3568         }
3569
3570         /*
3571          * shrink the buffer to the returned size.
3572          * (can't fail). It means NULL if size is 0.
3573          */
3574         state->xattr_value = talloc_realloc(state,
3575                                             state->xattr_value,
3576                                             uint8_t,
3577                                             state->xattr_size);
3578
3579         tevent_req_done(req);
3580 }
3581
3582 static ssize_t vfswrap_getxattrat_recv(struct tevent_req *req,
3583                                        struct vfs_aio_state *aio_state,
3584                                        TALLOC_CTX *mem_ctx,
3585                                        uint8_t **xattr_value)
3586 {
3587         struct vfswrap_getxattrat_state *state = tevent_req_data(
3588                 req, struct vfswrap_getxattrat_state);
3589         ssize_t xattr_size;
3590
3591         if (tevent_req_is_unix_error(req, &aio_state->error)) {
3592                 tevent_req_received(req);
3593                 return -1;
3594         }
3595
3596         *aio_state = state->vfs_aio_state;
3597         xattr_size = state->xattr_size;
3598         if (xattr_value != NULL) {
3599                 *xattr_value = talloc_move(mem_ctx, &state->xattr_value);
3600         }
3601
3602         tevent_req_received(req);
3603         return xattr_size;
3604 }
3605
3606 static ssize_t vfswrap_fgetxattr(struct vfs_handle_struct *handle,
3607                                  struct files_struct *fsp,
3608                                  const char *name,
3609                                  void *value,
3610                                  size_t size)
3611 {
3612         int fd = fsp_get_pathref_fd(fsp);
3613
3614         if (!fsp->fsp_flags.is_pathref) {
3615                 return fgetxattr(fd, name, value, size);
3616         }
3617
3618         if (fsp->fsp_flags.have_proc_fds) {
3619                 const char *p = NULL;
3620                 char buf[PATH_MAX];
3621
3622                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
3623                 if (p == NULL) {
3624                         return -1;
3625                 }
3626
3627                 return getxattr(p, name, value, size);
3628         }
3629
3630         /*
3631          * This is no longer a handle based call.
3632          */
3633         return getxattr(fsp->fsp_name->base_name, name, value, size);
3634 }
3635
3636 static ssize_t vfswrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size)
3637 {
3638         int fd = fsp_get_pathref_fd(fsp);
3639
3640         if (!fsp->fsp_flags.is_pathref) {
3641                 return flistxattr(fd, list, size);
3642         }
3643
3644         if (fsp->fsp_flags.have_proc_fds) {
3645                 const char *p = NULL;
3646                 char buf[PATH_MAX];
3647
3648                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
3649                 if (p == NULL) {
3650                         return -1;
3651                 }
3652
3653                 return listxattr(p, list, size);
3654         }
3655
3656         /*
3657          * This is no longer a handle based call.
3658          */
3659         return listxattr(fsp->fsp_name->base_name, list, size);
3660 }
3661
3662 static int vfswrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name)
3663 {
3664         int fd = fsp_get_pathref_fd(fsp);
3665
3666         if (!fsp->fsp_flags.is_pathref) {
3667                 return fremovexattr(fd, name);
3668         }
3669
3670         if (fsp->fsp_flags.have_proc_fds) {
3671                 const char *p = NULL;
3672                 char buf[PATH_MAX];
3673
3674                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
3675                 if (p == NULL) {
3676                         return -1;
3677                 }
3678
3679                 return removexattr(p, name);
3680         }
3681
3682         /*
3683          * This is no longer a handle based call.
3684          */
3685         return removexattr(fsp->fsp_name->base_name, name);
3686 }
3687
3688 static int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags)
3689 {
3690         int fd = fsp_get_pathref_fd(fsp);
3691
3692         if (!fsp->fsp_flags.is_pathref) {
3693                 return fsetxattr(fd, name, value, size, flags);
3694         }
3695
3696         if (fsp->fsp_flags.have_proc_fds) {
3697                 const char *p = NULL;
3698                 char buf[PATH_MAX];
3699
3700                 p = sys_proc_fd_path(fd, buf, sizeof(buf));
3701                 if (p == NULL) {
3702                         return -1;
3703                 }
3704
3705                 return setxattr(p, name, value, size, flags);
3706         }
3707
3708         /*
3709          * This is no longer a handle based call.
3710          */
3711         return setxattr(fsp->fsp_name->base_name, name, value, size, flags);
3712 }
3713
3714 static bool vfswrap_aio_force(struct vfs_handle_struct *handle, struct files_struct *fsp)
3715 {
3716         return false;
3717 }
3718
3719 static bool vfswrap_is_offline(struct connection_struct *conn,
3720                                const struct smb_filename *fname)
3721 {
3722         NTSTATUS status;
3723         char *path;
3724         bool offline = false;
3725
3726         if (ISDOT(fname->base_name) || ISDOTDOT(fname->base_name)) {
3727                 return false;
3728         }
3729
3730         if (!lp_dmapi_support(SNUM(conn)) || !dmapi_have_session()) {
3731 #if defined(ENOTSUP)
3732                 errno = ENOTSUP;
3733 #endif
3734                 return false;
3735         }
3736
3737         status = get_full_smb_filename(talloc_tos(), fname, &path);
3738         if (!NT_STATUS_IS_OK(status)) {
3739                 errno = map_errno_from_nt_status(status);
3740                 return false;
3741         }
3742
3743         offline = (dmapi_file_flags(path) & FILE_ATTRIBUTE_OFFLINE) != 0;
3744
3745         TALLOC_FREE(path);
3746
3747         return offline;
3748 }
3749
3750 static NTSTATUS vfswrap_durable_cookie(struct vfs_handle_struct *handle,
3751                                        struct files_struct *fsp,
3752                                        TALLOC_CTX *mem_ctx,
3753                                        DATA_BLOB *cookie)
3754 {
3755         return vfs_default_durable_cookie(fsp, mem_ctx, cookie);
3756 }
3757
3758 static NTSTATUS vfswrap_durable_disconnect(struct vfs_handle_struct *handle,
3759                                            struct files_struct *fsp,
3760                                            const DATA_BLOB old_cookie,
3761                                            TALLOC_CTX *mem_ctx,
3762                                            DATA_BLOB *new_cookie)
3763 {
3764         return vfs_default_durable_disconnect(fsp, old_cookie, mem_ctx,
3765                                               new_cookie);
3766 }
3767
3768 static NTSTATUS vfswrap_durable_reconnect(struct vfs_handle_struct *handle,
3769                                           struct smb_request *smb1req,
3770                                           struct smbXsrv_open *op,
3771                                           const DATA_BLOB old_cookie,
3772                                           TALLOC_CTX *mem_ctx,
3773                                           struct files_struct **fsp,
3774                                           DATA_BLOB *new_cookie)
3775 {
3776         return vfs_default_durable_reconnect(handle->conn, smb1req, op,
3777                                              old_cookie, mem_ctx,
3778                                              fsp, new_cookie);
3779 }
3780
3781 static struct vfs_fn_pointers vfs_default_fns = {
3782         /* Disk operations */