Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 : Files[] structure handling
4 : Copyright (C) Andrew Tridgell 1998
5 :
6 : This program is free software; you can redistribute it and/or modify
7 : it under the terms of the GNU General Public License as published by
8 : the Free Software Foundation; either version 3 of the License, or
9 : (at your option) any later version.
10 :
11 : This program is distributed in the hope that it will be useful,
12 : but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : GNU General Public License for more details.
15 :
16 : You should have received a copy of the GNU General Public License
17 : along with this program. If not, see <http://www.gnu.org/licenses/>.
18 : */
19 :
20 : #include "includes.h"
21 : #include "smbd/smbd.h"
22 : #include "smbd/globals.h"
23 : #include "smbd/smbXsrv_open.h"
24 : #include "libcli/security/security.h"
25 : #include "util_tdb.h"
26 : #include "lib/util/bitmap.h"
27 : #include "lib/util/strv.h"
28 :
29 : #define FILE_HANDLE_OFFSET 0x1000
30 :
31 : static NTSTATUS fsp_attach_smb_fname(struct files_struct *fsp,
32 : struct smb_filename **_smb_fname);
33 :
34 : /**
35 : * create new fsp to be used for file_new or a durable handle reconnect
36 : */
37 6685863 : NTSTATUS fsp_new(struct connection_struct *conn, TALLOC_CTX *mem_ctx,
38 : files_struct **result)
39 : {
40 6685863 : NTSTATUS status = NT_STATUS_NO_MEMORY;
41 6685863 : files_struct *fsp = NULL;
42 6685863 : struct smbd_server_connection *sconn = conn->sconn;
43 :
44 6685863 : fsp = talloc_zero(mem_ctx, struct files_struct);
45 6685863 : if (fsp == NULL) {
46 0 : goto fail;
47 : }
48 :
49 : /*
50 : * This can't be a child of fsp because the file_handle can be ref'd
51 : * when doing a dos/fcb open, which will then share the file_handle
52 : * across multiple fsps.
53 : */
54 6685863 : fsp->fh = fd_handle_create(mem_ctx);
55 6685863 : if (fsp->fh == NULL) {
56 0 : goto fail;
57 : }
58 :
59 6685863 : fsp->fsp_flags.use_ofd_locks = !lp_smbd_force_process_locks(SNUM(conn));
60 : #ifndef HAVE_OFD_LOCKS
61 : fsp->fsp_flags.use_ofd_locks = false;
62 : #endif
63 :
64 6685863 : fh_set_refcount(fsp->fh, 1);
65 6685863 : fsp_set_fd(fsp, -1);
66 :
67 6685863 : fsp->fnum = FNUM_FIELD_INVALID;
68 6685863 : fsp->conn = conn;
69 6685863 : fsp->close_write_time = make_omit_timespec();
70 :
71 6685863 : DLIST_ADD(sconn->files, fsp);
72 6685863 : sconn->num_files += 1;
73 :
74 6685863 : conn->num_files_open++;
75 :
76 6685863 : DBG_INFO("allocated files structure (%u used)\n",
77 : (unsigned int)sconn->num_files);
78 :
79 6685863 : *result = fsp;
80 6685863 : return NT_STATUS_OK;
81 :
82 0 : fail:
83 0 : if (fsp != NULL) {
84 0 : TALLOC_FREE(fsp->fh);
85 : }
86 0 : TALLOC_FREE(fsp);
87 :
88 0 : return status;
89 : }
90 :
91 5929680 : void fsp_set_gen_id(files_struct *fsp)
92 : {
93 : static uint64_t gen_id = 1;
94 :
95 : /*
96 : * A billion of 64-bit increments per second gives us
97 : * more than 500 years of runtime without wrap.
98 : */
99 5929680 : gen_id++;
100 5929680 : fh_set_gen_id(fsp->fh, gen_id);
101 5929680 : }
102 :
103 : /****************************************************************************
104 : Find first available file slot.
105 : ****************************************************************************/
106 :
107 886413 : NTSTATUS fsp_bind_smb(struct files_struct *fsp, struct smb_request *req)
108 : {
109 886413 : struct smbXsrv_open *op = NULL;
110 : NTTIME now;
111 : NTSTATUS status;
112 :
113 886413 : if (req == NULL) {
114 315923 : DBG_DEBUG("INTERNAL_OPEN_ONLY, skipping smbXsrv_open\n");
115 315923 : return NT_STATUS_OK;
116 : }
117 :
118 570490 : now = timeval_to_nttime(&fsp->open_time);
119 :
120 570490 : status = smbXsrv_open_create(req->xconn,
121 570490 : fsp->conn->session_info,
122 : now,
123 : &op);
124 570490 : if (!NT_STATUS_IS_OK(status)) {
125 2 : return status;
126 : }
127 570488 : fsp->op = op;
128 570488 : op->compat = fsp;
129 570488 : fsp->fnum = op->local_id;
130 :
131 570488 : fsp->mid = req->mid;
132 570488 : req->chain_fsp = fsp;
133 :
134 570488 : DBG_DEBUG("fsp [%s] mid [%" PRIu64"]\n",
135 : fsp_str_dbg(fsp), fsp->mid);
136 :
137 570488 : return NT_STATUS_OK;
138 : }
139 :
140 596631 : NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
141 : files_struct **result)
142 : {
143 596631 : struct smbd_server_connection *sconn = conn->sconn;
144 : files_struct *fsp;
145 : NTSTATUS status;
146 :
147 596631 : status = fsp_new(conn, conn, &fsp);
148 596631 : if (!NT_STATUS_IS_OK(status)) {
149 0 : return status;
150 : }
151 :
152 596631 : GetTimeOfDay(&fsp->open_time);
153 :
154 596631 : status = fsp_bind_smb(fsp, req);
155 596631 : if (!NT_STATUS_IS_OK(status)) {
156 2 : file_free(NULL, fsp);
157 2 : return status;
158 : }
159 :
160 596629 : fsp_set_gen_id(fsp);
161 :
162 : /*
163 : * Create an smb_filename with "" for the base_name. There are very
164 : * few NULL checks, so make sure it's initialized with something. to
165 : * be safe until an audit can be done.
166 : */
167 596629 : fsp->fsp_name = synthetic_smb_fname(fsp,
168 : "",
169 : NULL,
170 : NULL,
171 : 0,
172 : 0);
173 596629 : if (fsp->fsp_name == NULL) {
174 0 : file_free(NULL, fsp);
175 0 : return NT_STATUS_NO_MEMORY;
176 : }
177 :
178 596629 : DBG_INFO("new file %s\n", fsp_fnum_dbg(fsp));
179 :
180 : /* A new fsp invalidates the positive and
181 : negative fsp_fi_cache as the new fsp is pushed
182 : at the start of the list and we search from
183 : a cache hit to the *end* of the list. */
184 :
185 596629 : ZERO_STRUCT(sconn->fsp_fi_cache);
186 :
187 596629 : *result = fsp;
188 596629 : return NT_STATUS_OK;
189 : }
190 :
191 307964 : NTSTATUS create_internal_fsp(connection_struct *conn,
192 : const struct smb_filename *smb_fname,
193 : struct files_struct **_fsp)
194 : {
195 307964 : struct files_struct *fsp = NULL;
196 : NTSTATUS status;
197 :
198 307964 : status = file_new(NULL, conn, &fsp);
199 307964 : if (!NT_STATUS_IS_OK(status)) {
200 0 : return status;
201 : }
202 :
203 307964 : status = fsp_set_smb_fname(fsp, smb_fname);
204 307964 : if (!NT_STATUS_IS_OK(status)) {
205 0 : file_free(NULL, fsp);
206 0 : return status;
207 : }
208 :
209 307964 : *_fsp = fsp;
210 307964 : return NT_STATUS_OK;
211 : }
212 :
213 : /*
214 : * Create an internal fsp for an *existing* directory.
215 : *
216 : * This should only be used by callers in the VFS that need to control the
217 : * opening of the directory. Otherwise use open_internal_dirfsp_at().
218 : */
219 297630 : NTSTATUS create_internal_dirfsp(connection_struct *conn,
220 : const struct smb_filename *smb_dname,
221 : struct files_struct **_fsp)
222 : {
223 297630 : struct files_struct *fsp = NULL;
224 : NTSTATUS status;
225 :
226 297630 : status = create_internal_fsp(conn, smb_dname, &fsp);
227 297630 : if (!NT_STATUS_IS_OK(status)) {
228 0 : return status;
229 : }
230 :
231 297630 : fsp->access_mask = FILE_LIST_DIRECTORY;
232 297630 : fsp->fsp_flags.is_directory = true;
233 297630 : fsp->fsp_flags.is_dirfsp = true;
234 :
235 297630 : *_fsp = fsp;
236 297630 : return NT_STATUS_OK;
237 : }
238 :
239 : /*
240 : * Open an internal fsp for an *existing* directory.
241 : */
242 12771 : NTSTATUS open_internal_dirfsp(connection_struct *conn,
243 : const struct smb_filename *smb_dname,
244 : int open_flags,
245 : struct files_struct **_fsp)
246 : {
247 12771 : struct files_struct *fsp = NULL;
248 : NTSTATUS status;
249 :
250 12771 : status = create_internal_dirfsp(conn, smb_dname, &fsp);
251 12771 : if (!NT_STATUS_IS_OK(status)) {
252 0 : return status;
253 : }
254 :
255 : #ifdef O_DIRECTORY
256 12771 : open_flags |= O_DIRECTORY;
257 : #endif
258 12771 : status = fd_openat(conn->cwd_fsp, fsp->fsp_name, fsp, open_flags, 0);
259 12771 : if (!NT_STATUS_IS_OK(status)) {
260 0 : DBG_INFO("Could not open fd for %s (%s)\n",
261 : smb_fname_str_dbg(smb_dname),
262 : nt_errstr(status));
263 0 : file_free(NULL, fsp);
264 0 : return status;
265 : }
266 :
267 12771 : status = vfs_stat_fsp(fsp);
268 12771 : if (!NT_STATUS_IS_OK(status)) {
269 0 : file_free(NULL, fsp);
270 0 : return status;
271 : }
272 :
273 12771 : if (!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
274 0 : DBG_ERR("%s is not a directory!\n",
275 : smb_fname_str_dbg(smb_dname));
276 0 : file_free(NULL, fsp);
277 0 : return NT_STATUS_NOT_A_DIRECTORY;
278 : }
279 :
280 12771 : fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
281 :
282 12771 : *_fsp = fsp;
283 12771 : return NT_STATUS_OK;
284 : }
285 :
286 : /*
287 : * Convert a pathref dirfsp into a real fsp. No need to do any cwd
288 : * tricks, we just open ".".
289 : */
290 281722 : NTSTATUS openat_internal_dir_from_pathref(
291 : struct files_struct *dirfsp,
292 : int open_flags,
293 : struct files_struct **_fsp)
294 : {
295 281722 : struct connection_struct *conn = dirfsp->conn;
296 281722 : struct smb_filename *smb_dname = dirfsp->fsp_name;
297 281722 : struct files_struct *fsp = NULL;
298 281722 : char dot[] = ".";
299 747618 : struct smb_filename smb_dot = {
300 : .base_name = dot,
301 281722 : .flags = smb_dname->flags,
302 281722 : .twrp = smb_dname->twrp,
303 : };
304 : NTSTATUS status;
305 :
306 281722 : status = create_internal_dirfsp(conn, smb_dname, &fsp);
307 281722 : if (!NT_STATUS_IS_OK(status)) {
308 0 : return status;
309 : }
310 :
311 : /*
312 : * Pointless for opening ".", but you never know...
313 : */
314 281722 : open_flags |= O_NOFOLLOW;
315 :
316 281722 : status = fd_openat(dirfsp, &smb_dot, fsp, open_flags, 0);
317 281722 : if (!NT_STATUS_IS_OK(status)) {
318 2 : DBG_INFO("fd_openat(\"%s\", \".\") failed: %s\n",
319 : fsp_str_dbg(dirfsp),
320 : nt_errstr(status));
321 2 : file_free(NULL, fsp);
322 2 : return status;
323 : }
324 :
325 281720 : fsp->fsp_name->st = smb_dname->st;
326 281720 : fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
327 281720 : *_fsp = fsp;
328 281720 : return NT_STATUS_OK;
329 : }
330 :
331 : /*
332 : * The "link" in the name doesn't imply link in the filesystem
333 : * sense. It's a object that "links" together an fsp and an smb_fname
334 : * and the link allocated as talloc child of an fsp.
335 : *
336 : * The link is created for fsps that openat_pathref_fsp() returns in
337 : * smb_fname->fsp. When this fsp is freed by file_free() by some caller
338 : * somewhere, the destructor fsp_smb_fname_link_destructor() on the link object
339 : * will use the link to reset the reference in smb_fname->fsp that is about to
340 : * go away.
341 : *
342 : * This prevents smb_fname_internal_fsp_destructor() from seeing dangling fsp
343 : * pointers.
344 : */
345 :
346 : struct fsp_smb_fname_link {
347 : struct fsp_smb_fname_link **smb_fname_link;
348 : struct files_struct **smb_fname_fsp;
349 : };
350 :
351 6434077 : static int fsp_smb_fname_link_destructor(struct fsp_smb_fname_link *link)
352 : {
353 6434077 : if (link->smb_fname_link == NULL) {
354 0 : return 0;
355 : }
356 :
357 6434077 : *link->smb_fname_link = NULL;
358 6434077 : *link->smb_fname_fsp = NULL;
359 6434077 : return 0;
360 : }
361 :
362 12522525 : static NTSTATUS fsp_smb_fname_link(struct files_struct *fsp,
363 : struct fsp_smb_fname_link **smb_fname_link,
364 : struct files_struct **smb_fname_fsp)
365 : {
366 12522525 : struct fsp_smb_fname_link *link = NULL;
367 :
368 12522525 : SMB_ASSERT(*smb_fname_link == NULL);
369 12522525 : SMB_ASSERT(*smb_fname_fsp == NULL);
370 :
371 12522525 : link = talloc_zero(fsp, struct fsp_smb_fname_link);
372 12522525 : if (link == NULL) {
373 0 : return NT_STATUS_NO_MEMORY;
374 : }
375 :
376 12522525 : link->smb_fname_link = smb_fname_link;
377 12522525 : link->smb_fname_fsp = smb_fname_fsp;
378 12522525 : *smb_fname_link = link;
379 12522525 : *smb_fname_fsp = fsp;
380 :
381 12522525 : talloc_set_destructor(link, fsp_smb_fname_link_destructor);
382 12522525 : return NT_STATUS_OK;
383 : }
384 :
385 : /*
386 : * Free a link, carefully avoiding to trigger the link destructor
387 : */
388 7277958 : static void destroy_fsp_smb_fname_link(struct fsp_smb_fname_link **_link)
389 : {
390 7277958 : struct fsp_smb_fname_link *link = *_link;
391 :
392 7277958 : if (link == NULL) {
393 1189530 : return;
394 : }
395 6088428 : talloc_set_destructor(link, NULL);
396 6088428 : TALLOC_FREE(link);
397 6088428 : *_link = NULL;
398 : }
399 :
400 : /*
401 : * Talloc destructor set on an smb_fname set by openat_pathref_fsp() used to
402 : * close the embedded smb_fname->fsp.
403 : */
404 4753218 : static int smb_fname_fsp_destructor(struct smb_filename *smb_fname)
405 : {
406 4753218 : struct files_struct *fsp = smb_fname->fsp;
407 : NTSTATUS status;
408 4753218 : int saved_errno = errno;
409 :
410 4753218 : destroy_fsp_smb_fname_link(&smb_fname->fsp_link);
411 :
412 4753218 : if (fsp == NULL) {
413 143 : errno = saved_errno;
414 143 : return 0;
415 : }
416 :
417 4753075 : if (fsp_is_alternate_stream(fsp)) {
418 717 : struct files_struct *tmp_base_fsp = fsp->base_fsp;
419 :
420 717 : fsp_set_base_fsp(fsp, NULL);
421 :
422 717 : status = fd_close(tmp_base_fsp);
423 717 : if (!NT_STATUS_IS_OK(status)) {
424 0 : DBG_ERR("Closing fd for fsp [%s] failed: %s. "
425 : "Please check your filesystem!!!\n",
426 : fsp_str_dbg(fsp), nt_errstr(status));
427 : }
428 717 : file_free(NULL, tmp_base_fsp);
429 : }
430 :
431 4753075 : status = fd_close(fsp);
432 4753075 : if (!NT_STATUS_IS_OK(status)) {
433 0 : DBG_ERR("Closing fd for fsp [%s] failed: %s. "
434 : "Please check your filesystem!!!\n",
435 : fsp_str_dbg(fsp), nt_errstr(status));
436 : }
437 4753075 : file_free(NULL, fsp);
438 4753075 : smb_fname->fsp = NULL;
439 :
440 4753075 : errno = saved_errno;
441 4753075 : return 0;
442 : }
443 :
444 5332913 : static NTSTATUS openat_pathref_fullname(
445 : struct connection_struct *conn,
446 : const struct files_struct *dirfsp,
447 : struct files_struct *basefsp,
448 : struct smb_filename **full_fname,
449 : struct smb_filename *smb_fname)
450 : {
451 5332913 : struct files_struct *fsp = NULL;
452 5332913 : bool have_dirfsp = (dirfsp != NULL);
453 5332913 : bool have_basefsp = (basefsp != NULL);
454 : NTSTATUS status;
455 :
456 5332913 : DBG_DEBUG("smb_fname [%s]\n", smb_fname_str_dbg(smb_fname));
457 :
458 5332913 : SMB_ASSERT(smb_fname->fsp == NULL);
459 5332913 : SMB_ASSERT(have_dirfsp != have_basefsp);
460 :
461 5332913 : status = fsp_new(conn, conn, &fsp);
462 5332913 : if (!NT_STATUS_IS_OK(status)) {
463 0 : return status;
464 : }
465 :
466 5332913 : GetTimeOfDay(&fsp->open_time);
467 5332913 : fsp_set_gen_id(fsp);
468 5332913 : ZERO_STRUCT(conn->sconn->fsp_fi_cache);
469 :
470 5332913 : fsp->fsp_flags.is_pathref = true;
471 :
472 5332913 : status = fsp_attach_smb_fname(fsp, full_fname);
473 5332913 : if (!NT_STATUS_IS_OK(status)) {
474 0 : goto fail;
475 : }
476 5332913 : fsp_set_base_fsp(fsp, basefsp);
477 :
478 5332913 : status = fd_openat(
479 : dirfsp, smb_fname, fsp, O_RDONLY|O_NONBLOCK, 0);
480 5332913 : if (!NT_STATUS_IS_OK(status)) {
481 :
482 786774 : smb_fname->st = fsp->fsp_name->st;
483 :
484 1437591 : if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND) ||
485 1436198 : NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_PATH_NOT_FOUND) ||
486 785381 : NT_STATUS_EQUAL(status, NT_STATUS_STOPPED_ON_SYMLINK))
487 : {
488 : /*
489 : * streams_xattr return NT_STATUS_NOT_FOUND for
490 : * opens of not yet existing streams.
491 : *
492 : * ELOOP maps to NT_STATUS_OBJECT_PATH_NOT_FOUND
493 : * and this will result from a open request from
494 : * a POSIX client on a symlink.
495 : *
496 : * NT_STATUS_OBJECT_NAME_NOT_FOUND is the simple
497 : * ENOENT case.
498 : *
499 : * NT_STATUS_STOPPED_ON_SYMLINK is returned when trying
500 : * to open a symlink, our callers are not interested in
501 : * this.
502 : */
503 4625 : status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
504 : }
505 786774 : goto fail;
506 : }
507 :
508 : /*
509 : * fd_openat() has done an FSTAT on the handle
510 : * so update the smb_fname stat info with "truth".
511 : * from the handle.
512 : */
513 4546139 : smb_fname->st = fsp->fsp_name->st;
514 :
515 4546139 : fsp->fsp_flags.is_directory = S_ISDIR(fsp->fsp_name->st.st_ex_mode);
516 :
517 4546139 : fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
518 :
519 4546139 : status = fsp_smb_fname_link(fsp,
520 : &smb_fname->fsp_link,
521 : &smb_fname->fsp);
522 4546139 : if (!NT_STATUS_IS_OK(status)) {
523 0 : goto fail;
524 : }
525 :
526 4546139 : DBG_DEBUG("fsp [%s]: OK\n", fsp_str_dbg(fsp));
527 :
528 4546139 : talloc_set_destructor(smb_fname, smb_fname_fsp_destructor);
529 4546139 : return NT_STATUS_OK;
530 :
531 786774 : fail:
532 786774 : DBG_DEBUG("Opening pathref for [%s] failed: %s\n",
533 : smb_fname_str_dbg(smb_fname),
534 : nt_errstr(status));
535 :
536 786774 : fsp_set_base_fsp(fsp, NULL);
537 786774 : fd_close(fsp);
538 786774 : file_free(NULL, fsp);
539 786774 : return status;
540 : }
541 :
542 : /*
543 : * Open an internal O_PATH based fsp for smb_fname. If O_PATH is not
544 : * available, open O_RDONLY as root. Both is done in fd_open() ->
545 : * non_widelink_open(), triggered by setting fsp->fsp_flags.is_pathref to
546 : * true.
547 : */
548 5325502 : NTSTATUS openat_pathref_fsp(const struct files_struct *dirfsp,
549 : struct smb_filename *smb_fname)
550 : {
551 5325502 : connection_struct *conn = dirfsp->conn;
552 5325502 : struct smb_filename *full_fname = NULL;
553 5325502 : struct smb_filename *base_fname = NULL;
554 : NTSTATUS status;
555 :
556 5325502 : DBG_DEBUG("smb_fname [%s]\n", smb_fname_str_dbg(smb_fname));
557 :
558 5325502 : if (smb_fname->fsp != NULL) {
559 : /* We already have one for this name. */
560 420 : DBG_DEBUG("smb_fname [%s] already has a pathref fsp.\n",
561 : smb_fname_str_dbg(smb_fname));
562 420 : return NT_STATUS_OK;
563 : }
564 :
565 9415276 : if (!(conn->fs_capabilities & FILE_NAMED_STREAMS) ||
566 4931117 : !is_named_stream(smb_fname)) {
567 : /*
568 : * openat_pathref_fullname() will make "full_fname" a
569 : * talloc child of the smb_fname->fsp. Don't use
570 : * talloc_tos() to allocate it to avoid making the
571 : * talloc stackframe pool long-lived.
572 : */
573 5323306 : full_fname = full_path_from_dirfsp_atname(
574 : conn,
575 : dirfsp,
576 : smb_fname);
577 5323306 : if (full_fname == NULL) {
578 0 : status = NT_STATUS_NO_MEMORY;
579 0 : goto fail;
580 : }
581 5323306 : status = openat_pathref_fullname(
582 : conn, dirfsp, NULL, &full_fname, smb_fname);
583 5323306 : TALLOC_FREE(full_fname);
584 5323306 : return status;
585 : }
586 :
587 : /*
588 : * stream open
589 : */
590 1776 : base_fname = cp_smb_filename_nostream(conn, smb_fname);
591 1776 : if (base_fname == NULL) {
592 0 : return NT_STATUS_NO_MEMORY;
593 : }
594 :
595 1776 : full_fname = full_path_from_dirfsp_atname(
596 : conn, /* no talloc_tos(), see comment above */
597 : dirfsp,
598 : base_fname);
599 1776 : if (full_fname == NULL) {
600 0 : status = NT_STATUS_NO_MEMORY;
601 0 : goto fail;
602 : }
603 :
604 1776 : status = openat_pathref_fullname(
605 : conn, dirfsp, NULL, &full_fname, base_fname);
606 1776 : TALLOC_FREE(full_fname);
607 1776 : if (!NT_STATUS_IS_OK(status)) {
608 0 : DBG_DEBUG("openat_pathref_nostream failed: %s\n",
609 : nt_errstr(status));
610 0 : goto fail;
611 : }
612 :
613 1776 : status = open_stream_pathref_fsp(&base_fname->fsp, smb_fname);
614 1776 : if (!NT_STATUS_IS_OK(status)) {
615 258 : DBG_DEBUG("open_stream_pathref_fsp failed: %s\n",
616 : nt_errstr(status));
617 258 : goto fail;
618 : }
619 :
620 1518 : smb_fname_fsp_unlink(base_fname);
621 1776 : fail:
622 1776 : TALLOC_FREE(base_fname);
623 1776 : return status;
624 : }
625 :
626 : /*
627 : * Open a stream given an already opened base_fsp. Avoid
628 : * non_widelink_open: This is only valid for the case where we have a
629 : * valid non-cwd_fsp dirfsp that we can pass to SMB_VFS_OPENAT()
630 : */
631 7831 : NTSTATUS open_stream_pathref_fsp(
632 : struct files_struct **_base_fsp,
633 : struct smb_filename *smb_fname)
634 : {
635 7831 : struct files_struct *base_fsp = *_base_fsp;
636 7831 : connection_struct *conn = base_fsp->conn;
637 7831 : struct smb_filename *base_fname = base_fsp->fsp_name;
638 7831 : struct smb_filename *full_fname = NULL;
639 : NTSTATUS status;
640 :
641 7831 : SMB_ASSERT(smb_fname->fsp == NULL);
642 7831 : SMB_ASSERT(is_named_stream(smb_fname));
643 :
644 15662 : full_fname = synthetic_smb_fname(
645 : conn, /* no talloc_tos(), this will be long-lived */
646 7831 : base_fname->base_name,
647 7831 : smb_fname->stream_name,
648 7831 : &smb_fname->st,
649 : smb_fname->twrp,
650 : smb_fname->flags);
651 7831 : if (full_fname == NULL) {
652 0 : return NT_STATUS_NO_MEMORY;
653 : }
654 :
655 7831 : status = openat_pathref_fullname(
656 : conn, NULL, base_fsp, &full_fname, smb_fname);
657 7831 : TALLOC_FREE(full_fname);
658 7831 : return status;
659 : }
660 :
661 517686 : static char *path_to_strv(TALLOC_CTX *mem_ctx, const char *path)
662 : {
663 517686 : char *result = talloc_strdup(mem_ctx, path);
664 :
665 517686 : if (result == NULL) {
666 0 : return NULL;
667 : }
668 517686 : string_replace(result, '/', '\0');
669 517686 : return result;
670 : }
671 :
672 12325 : static NTSTATUS readlink_talloc(
673 : TALLOC_CTX *mem_ctx,
674 : struct files_struct *dirfsp,
675 : struct smb_filename *smb_relname,
676 : char **_substitute)
677 : {
678 : char buf[4096];
679 : ssize_t ret;
680 : char *substitute;
681 : NTSTATUS status;
682 :
683 12325 : if (_substitute == NULL) {
684 0 : return NT_STATUS_OK;
685 : }
686 :
687 12325 : if (smb_relname == NULL) {
688 : /*
689 : * We have a Linux O_PATH handle in dirfsp and want to
690 : * read its value, essentially a freadlink
691 : */
692 0 : smb_relname = synthetic_smb_fname(
693 : talloc_tos(), "", NULL, NULL, 0, 0);
694 0 : if (smb_relname == NULL) {
695 0 : DBG_DEBUG("synthetic_smb_fname() failed\n");
696 0 : return NT_STATUS_NO_MEMORY;
697 : }
698 : }
699 :
700 12325 : ret = SMB_VFS_READLINKAT(
701 : dirfsp->conn, dirfsp, smb_relname, buf, sizeof(buf));
702 12325 : if (ret < 0) {
703 24 : status = map_nt_error_from_unix(errno);
704 24 : DBG_DEBUG("SMB_VFS_READLINKAT() failed: %s\n",
705 : strerror(errno));
706 24 : return status;
707 : }
708 :
709 12301 : if ((size_t)ret == sizeof(buf)) {
710 : /*
711 : * Do we need symlink targets >4k?
712 : */
713 0 : DBG_DEBUG("Got full %zu bytes from readlink, too long\n",
714 : sizeof(buf));
715 0 : return NT_STATUS_BUFFER_OVERFLOW;
716 : }
717 :
718 12301 : substitute = talloc_strndup(mem_ctx, buf, ret);
719 12301 : if (substitute == NULL) {
720 0 : DBG_DEBUG("talloc_strndup() failed\n");
721 0 : return NT_STATUS_NO_MEMORY;
722 : }
723 :
724 12301 : *_substitute = substitute;
725 12301 : return NT_STATUS_OK;
726 : }
727 :
728 517686 : NTSTATUS openat_pathref_dirfsp_nosymlink(
729 : TALLOC_CTX *mem_ctx,
730 : struct connection_struct *conn,
731 : const char *path_in,
732 : NTTIME twrp,
733 : struct smb_filename **_smb_fname,
734 : size_t *unparsed,
735 : char **substitute)
736 : {
737 517686 : struct files_struct *dirfsp = conn->cwd_fsp;
738 517686 : struct smb_filename full_fname = {
739 : .base_name = NULL,
740 : .twrp = twrp,
741 : };
742 517686 : struct smb_filename rel_fname = {
743 : .base_name = NULL,
744 : .twrp = twrp,
745 : };
746 517686 : struct smb_filename *result = NULL;
747 517686 : struct files_struct *fsp = NULL;
748 517686 : char *path = NULL, *next = NULL;
749 517686 : int flags = O_NOFOLLOW|O_DIRECTORY;
750 : int fd;
751 : NTSTATUS status;
752 :
753 517686 : DBG_DEBUG("path_in=%s\n", path_in);
754 :
755 517686 : status = fsp_new(conn, conn, &fsp);
756 517686 : if (!NT_STATUS_IS_OK(status)) {
757 0 : DBG_DEBUG("fsp_new() failed: %s\n", nt_errstr(status));
758 0 : goto fail;
759 : }
760 517686 : fsp->fsp_name = &full_fname;
761 :
762 : #ifdef O_PATH
763 : /*
764 : * Add O_PATH manually, doing this by setting
765 : * fsp->fsp_flags.is_pathref will make us become_root(), which
766 : * would cause a security problem.
767 : */
768 362084 : flags |= O_PATH;
769 : #else
770 : #ifdef O_SEARCH
771 : /*
772 : * O_SEARCH just checks for the "x" bit. We are traversing
773 : * directories, so we don't need the implicit O_RDONLY ("r"
774 : * permissions) but only the "x"-permissions requested by
775 : * O_SEARCH. We need either O_PATH or O_SEARCH to correctly
776 : * function, without either we will incorrectly require also
777 : * the "r" bit when traversing the directory hierarchy.
778 : */
779 : flags |= O_SEARCH;
780 : #endif
781 : #endif
782 :
783 517686 : full_fname.base_name = talloc_strdup(talloc_tos(), "");
784 517686 : if (full_fname.base_name == NULL) {
785 0 : DBG_DEBUG("talloc_strdup() failed\n");
786 0 : goto nomem;
787 : }
788 :
789 517686 : path = path_to_strv(talloc_tos(), path_in);
790 517686 : if (path == NULL) {
791 0 : DBG_DEBUG("path_to_strv() failed\n");
792 0 : goto nomem;
793 : }
794 517686 : rel_fname.base_name = path;
795 :
796 792139 : next:
797 792139 : next = strv_next(path, rel_fname.base_name);
798 :
799 792139 : if (ISDOT(rel_fname.base_name) || ISDOTDOT(rel_fname.base_name)) {
800 108 : DBG_DEBUG("%s contains a dot\n", path_in);
801 108 : status = NT_STATUS_OBJECT_NAME_INVALID;
802 108 : goto fail;
803 : }
804 :
805 792031 : fd = SMB_VFS_OPENAT(
806 : conn,
807 : dirfsp,
808 : &rel_fname,
809 : fsp,
810 : flags,
811 : 0);
812 :
813 792031 : if ((fd == -1) && (errno == ENOENT)) {
814 3817 : status = get_real_filename_at(
815 : dirfsp,
816 2068 : rel_fname.base_name,
817 : talloc_tos(),
818 : &rel_fname.base_name);
819 :
820 2068 : if (!NT_STATUS_IS_OK(status)) {
821 939 : DBG_DEBUG("get_real_filename_at failed: %s\n",
822 : nt_errstr(status));
823 939 : goto fail;
824 : }
825 :
826 1129 : fd = SMB_VFS_OPENAT(
827 : conn,
828 : dirfsp,
829 : &rel_fname,
830 : fsp,
831 : flags,
832 : 0);
833 : }
834 :
835 791092 : if ((fd == -1) && (errno == ENOTDIR)) {
836 12325 : status = readlink_talloc(
837 : mem_ctx, dirfsp, &rel_fname, substitute);
838 :
839 12325 : if (NT_STATUS_IS_OK(status)) {
840 : /*
841 : * readlink_talloc() found a symlink
842 : */
843 12301 : status = NT_STATUS_STOPPED_ON_SYMLINK;
844 :
845 12301 : if (unparsed != NULL) {
846 12301 : if (next == NULL) {
847 797 : *unparsed = 0;
848 : } else {
849 11504 : size_t parsed = next - path;
850 11504 : size_t len = talloc_get_size(path);
851 11504 : *unparsed = len - parsed;
852 : }
853 : }
854 : } else {
855 :
856 24 : DBG_DEBUG("readlink_talloc failed: %s\n",
857 : nt_errstr(status));
858 : /*
859 : * Restore the error status from SMB_VFS_OPENAT()
860 : */
861 24 : status = NT_STATUS_NOT_A_DIRECTORY;
862 : }
863 12325 : goto fail;
864 : }
865 :
866 778767 : if (fd == -1) {
867 8 : status = map_nt_error_from_unix(errno);
868 8 : DBG_DEBUG("SMB_VFS_OPENAT() failed: %s\n",
869 : strerror(errno));
870 8 : goto fail;
871 : }
872 778759 : fsp_set_fd(fsp, fd);
873 :
874 778759 : fsp->fsp_flags.is_directory = true; /* See O_DIRECTORY above */
875 :
876 1416742 : full_fname.base_name = talloc_asprintf_append_buffer(
877 : full_fname.base_name,
878 : "%s%s",
879 778759 : full_fname.base_name[0] == '\0' ? "" : "/",
880 : rel_fname.base_name);
881 :
882 778759 : if (full_fname.base_name == NULL) {
883 0 : DBG_DEBUG("talloc_asprintf_append_buffer() failed\n");
884 0 : goto nomem;
885 : }
886 :
887 778759 : if (next != NULL) {
888 274453 : struct files_struct *tmp = NULL;
889 :
890 274453 : if (dirfsp != conn->cwd_fsp) {
891 35958 : fd_close(dirfsp);
892 : }
893 :
894 274453 : tmp = dirfsp;
895 274453 : dirfsp = fsp;
896 :
897 274453 : if (tmp == conn->cwd_fsp) {
898 238495 : status = fsp_new(conn, conn, &fsp);
899 238495 : if (!NT_STATUS_IS_OK(status)) {
900 0 : DBG_DEBUG("fsp_new() failed: %s\n",
901 : nt_errstr(status));
902 0 : goto fail;
903 : }
904 238495 : fsp->fsp_flags.is_pathref = true;
905 238495 : fsp->fsp_name = &full_fname;
906 : } else {
907 35958 : fsp = tmp;
908 : }
909 :
910 274453 : rel_fname.base_name = next;
911 :
912 274453 : goto next;
913 : }
914 :
915 504306 : if (dirfsp != conn->cwd_fsp) {
916 226163 : dirfsp->fsp_name = NULL;
917 226163 : SMB_ASSERT(fsp_get_pathref_fd(dirfsp) != -1);
918 226163 : fd_close(dirfsp);
919 226163 : file_free(NULL, dirfsp);
920 226163 : dirfsp = NULL;
921 : }
922 :
923 504306 : fsp->fsp_flags.is_pathref = true;
924 504306 : fsp->fsp_name = NULL;
925 :
926 504306 : status = fsp_set_smb_fname(fsp, &full_fname);
927 504306 : if (!NT_STATUS_IS_OK(status)) {
928 0 : DBG_DEBUG("fsp_set_smb_fname() failed: %s\n",
929 : nt_errstr(status));
930 0 : goto fail;
931 : }
932 :
933 504306 : status = vfs_stat_fsp(fsp);
934 504306 : if (!NT_STATUS_IS_OK(status)) {
935 0 : DBG_DEBUG("vfs_stat_fsp(%s) failed: %s\n",
936 : fsp_str_dbg(fsp),
937 : nt_errstr(status));
938 0 : goto fail;
939 : }
940 : /*
941 : * We must correctly set fsp->file_id as code inside
942 : * open.c will use this to check if delete_on_close
943 : * has been set on the dirfsp.
944 : */
945 504306 : fsp->file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
946 :
947 504306 : result = cp_smb_filename(mem_ctx, fsp->fsp_name);
948 504306 : if (result == NULL) {
949 0 : DBG_DEBUG("cp_smb_filename() failed\n");
950 0 : goto nomem;
951 : }
952 :
953 504306 : status = fsp_smb_fname_link(fsp,
954 : &result->fsp_link,
955 : &result->fsp);
956 504306 : if (!NT_STATUS_IS_OK(status)) {
957 0 : goto fail;
958 : }
959 504306 : talloc_set_destructor(result, smb_fname_fsp_destructor);
960 :
961 504306 : *_smb_fname = result;
962 :
963 504306 : DBG_DEBUG("returning %s\n", smb_fname_str_dbg(result));
964 :
965 504306 : return NT_STATUS_OK;
966 :
967 0 : nomem:
968 0 : status = NT_STATUS_NO_MEMORY;
969 13380 : fail:
970 13380 : if (fsp != NULL) {
971 13380 : if (fsp_get_pathref_fd(fsp) != -1) {
972 0 : fd_close(fsp);
973 : }
974 13380 : file_free(NULL, fsp);
975 13380 : fsp = NULL;
976 : }
977 :
978 13380 : if ((dirfsp != NULL) && (dirfsp != conn->cwd_fsp)) {
979 12332 : dirfsp->fsp_name = NULL;
980 12332 : SMB_ASSERT(fsp_get_pathref_fd(dirfsp) != -1);
981 12332 : fd_close(dirfsp);
982 12332 : file_free(NULL, dirfsp);
983 12332 : dirfsp = NULL;
984 : }
985 :
986 13380 : TALLOC_FREE(path);
987 13380 : return status;
988 : }
989 :
990 2349688 : void smb_fname_fsp_unlink(struct smb_filename *smb_fname)
991 : {
992 2349688 : talloc_set_destructor(smb_fname, NULL);
993 2349688 : smb_fname->fsp = NULL;
994 2349688 : destroy_fsp_smb_fname_link(&smb_fname->fsp_link);
995 2349688 : }
996 :
997 : /*
998 : * Move any existing embedded fsp refs from the src name to the
999 : * destination. It's safe to call this on src smb_fname's that have no embedded
1000 : * pathref fsp.
1001 : */
1002 852367 : NTSTATUS move_smb_fname_fsp_link(struct smb_filename *smb_fname_dst,
1003 : struct smb_filename *smb_fname_src)
1004 : {
1005 : NTSTATUS status;
1006 :
1007 : /*
1008 : * The target should always not be linked yet!
1009 : */
1010 852367 : SMB_ASSERT(smb_fname_dst->fsp == NULL);
1011 852367 : SMB_ASSERT(smb_fname_dst->fsp_link == NULL);
1012 :
1013 852367 : if (smb_fname_src->fsp == NULL) {
1014 1027 : return NT_STATUS_OK;
1015 : }
1016 :
1017 851340 : status = fsp_smb_fname_link(smb_fname_src->fsp,
1018 : &smb_fname_dst->fsp_link,
1019 : &smb_fname_dst->fsp);
1020 851340 : if (!NT_STATUS_IS_OK(status)) {
1021 0 : return status;
1022 : }
1023 :
1024 851340 : talloc_set_destructor(smb_fname_dst, smb_fname_fsp_destructor);
1025 :
1026 851340 : smb_fname_fsp_unlink(smb_fname_src);
1027 :
1028 851340 : return NT_STATUS_OK;
1029 : }
1030 :
1031 : /**
1032 : * Create an smb_fname and open smb_fname->fsp pathref
1033 : **/
1034 330267 : NTSTATUS synthetic_pathref(TALLOC_CTX *mem_ctx,
1035 : struct files_struct *dirfsp,
1036 : const char *base_name,
1037 : const char *stream_name,
1038 : const SMB_STRUCT_STAT *psbuf,
1039 : NTTIME twrp,
1040 : uint32_t flags,
1041 : struct smb_filename **_smb_fname)
1042 : {
1043 330267 : struct smb_filename *smb_fname = NULL;
1044 : NTSTATUS status;
1045 :
1046 330267 : smb_fname = synthetic_smb_fname(mem_ctx,
1047 : base_name,
1048 : stream_name,
1049 : psbuf,
1050 : twrp,
1051 : flags);
1052 330267 : if (smb_fname == NULL) {
1053 0 : return NT_STATUS_NO_MEMORY;
1054 : }
1055 :
1056 330267 : status = openat_pathref_fsp(dirfsp, smb_fname);
1057 330267 : if (!NT_STATUS_IS_OK(status)) {
1058 209428 : DBG_ERR("opening [%s] failed\n",
1059 : smb_fname_str_dbg(smb_fname));
1060 209428 : TALLOC_FREE(smb_fname);
1061 209428 : return status;
1062 : }
1063 :
1064 120839 : *_smb_fname = smb_fname;
1065 120839 : return NT_STATUS_OK;
1066 : }
1067 :
1068 175052 : static int atname_destructor(struct smb_filename *smb_fname)
1069 : {
1070 175052 : destroy_fsp_smb_fname_link(&smb_fname->fsp_link);
1071 175052 : return 0;
1072 : }
1073 :
1074 : /**
1075 : * Turn a path into a parent pathref and atname
1076 : *
1077 : * This returns the parent pathref in _parent and the name relative to it. If
1078 : * smb_fname was a pathref (ie smb_fname->fsp != NULL), then _atname will be a
1079 : * pathref as well, ie _atname->fsp will point at the same fsp as
1080 : * smb_fname->fsp.
1081 : **/
1082 309062 : NTSTATUS parent_pathref(TALLOC_CTX *mem_ctx,
1083 : struct files_struct *dirfsp,
1084 : const struct smb_filename *smb_fname,
1085 : struct smb_filename **_parent,
1086 : struct smb_filename **_atname)
1087 : {
1088 309062 : struct smb_filename *parent = NULL;
1089 309062 : struct smb_filename *atname = NULL;
1090 : NTSTATUS status;
1091 :
1092 309062 : status = SMB_VFS_PARENT_PATHNAME(dirfsp->conn,
1093 : mem_ctx,
1094 : smb_fname,
1095 : &parent,
1096 : &atname);
1097 309062 : if (!NT_STATUS_IS_OK(status)) {
1098 0 : return status;
1099 : }
1100 :
1101 : /*
1102 : * We know that the parent name must
1103 : * exist, and the name has been canonicalized
1104 : * even if this was a POSIX pathname.
1105 : * Ensure that we follow symlinks for
1106 : * the parent. See the torture test
1107 : * POSIX-SYMLINK-PARENT for details.
1108 : */
1109 309062 : parent->flags &= ~SMB_FILENAME_POSIX_PATH;
1110 :
1111 309062 : status = openat_pathref_fsp(dirfsp, parent);
1112 309062 : if (!NT_STATUS_IS_OK(status)) {
1113 83754 : TALLOC_FREE(parent);
1114 83754 : return status;
1115 : }
1116 :
1117 225308 : if (smb_fname->fsp != NULL) {
1118 322628 : status = fsp_smb_fname_link(smb_fname->fsp,
1119 175052 : &atname->fsp_link,
1120 175052 : &atname->fsp);
1121 175052 : if (!NT_STATUS_IS_OK(status)) {
1122 0 : TALLOC_FREE(parent);
1123 0 : return status;
1124 : }
1125 175052 : talloc_set_destructor(atname, atname_destructor);
1126 : }
1127 225308 : *_parent = parent;
1128 225308 : *_atname = atname;
1129 225308 : return NT_STATUS_OK;
1130 : }
1131 :
1132 5771 : static bool close_file_in_loop(struct files_struct *fsp)
1133 : {
1134 5771 : if (fsp_is_alternate_stream(fsp)) {
1135 : /*
1136 : * This is a stream, it can't be a base
1137 : */
1138 72 : SMB_ASSERT(fsp->stream_fsp == NULL);
1139 72 : SMB_ASSERT(fsp->base_fsp->stream_fsp == fsp);
1140 :
1141 : /*
1142 : * Remove the base<->stream link so that
1143 : * close_file_free() does not close fsp->base_fsp as
1144 : * well. This would destroy walking the linked list of
1145 : * fsps.
1146 : */
1147 72 : fsp->base_fsp->stream_fsp = NULL;
1148 72 : fsp->base_fsp = NULL;
1149 :
1150 72 : close_file_free(NULL, &fsp, SHUTDOWN_CLOSE);
1151 72 : return NULL;
1152 : }
1153 :
1154 5699 : if (fsp->stream_fsp != NULL) {
1155 : /*
1156 : * This is the base of a stream.
1157 : */
1158 0 : SMB_ASSERT(fsp->stream_fsp->base_fsp == fsp);
1159 :
1160 : /*
1161 : * Remove the base<->stream link. This will make fsp
1162 : * look like a normal fsp for the next round.
1163 : */
1164 0 : fsp->stream_fsp->base_fsp = NULL;
1165 0 : fsp->stream_fsp = NULL;
1166 :
1167 : /*
1168 : * Have us called back a second time. In the second
1169 : * round, "fsp" now looks like a normal fsp.
1170 : */
1171 0 : return false;
1172 : }
1173 :
1174 5699 : close_file_free(NULL, &fsp, SHUTDOWN_CLOSE);
1175 5699 : return true;
1176 : }
1177 :
1178 : /****************************************************************************
1179 : Close all open files for a connection.
1180 : ****************************************************************************/
1181 :
1182 : struct file_close_conn_state {
1183 : struct connection_struct *conn;
1184 : bool fsp_left_behind;
1185 : };
1186 :
1187 5299 : static struct files_struct *file_close_conn_fn(
1188 : struct files_struct *fsp,
1189 : void *private_data)
1190 : {
1191 5299 : struct file_close_conn_state *state = private_data;
1192 : bool did_close;
1193 :
1194 5299 : if (fsp->conn != state->conn) {
1195 1114 : return NULL;
1196 : }
1197 :
1198 4185 : if (fsp->op != NULL && fsp->op->global->durable) {
1199 : /*
1200 : * A tree disconnect closes a durable handle
1201 : */
1202 4 : fsp->op->global->durable = false;
1203 : }
1204 :
1205 4185 : did_close = close_file_in_loop(fsp);
1206 4185 : if (!did_close) {
1207 0 : state->fsp_left_behind = true;
1208 : }
1209 :
1210 4185 : return NULL;
1211 : }
1212 :
1213 53322 : void file_close_conn(connection_struct *conn)
1214 : {
1215 53322 : struct file_close_conn_state state = { .conn = conn };
1216 :
1217 53322 : files_forall(conn->sconn, file_close_conn_fn, &state);
1218 :
1219 53322 : if (state.fsp_left_behind) {
1220 0 : state.fsp_left_behind = false;
1221 0 : files_forall(conn->sconn, file_close_conn_fn, &state);
1222 0 : SMB_ASSERT(!state.fsp_left_behind);
1223 : }
1224 53322 : }
1225 :
1226 : /****************************************************************************
1227 : Initialise file structures.
1228 : ****************************************************************************/
1229 :
1230 : static int files_max_open_fds;
1231 :
1232 31540 : bool file_init_global(void)
1233 : {
1234 31540 : int request_max = lp_max_open_files();
1235 : int real_lim;
1236 : int real_max;
1237 :
1238 31540 : if (files_max_open_fds != 0) {
1239 31463 : return true;
1240 : }
1241 :
1242 : /*
1243 : * Set the max_open files to be the requested
1244 : * max plus a fudgefactor to allow for the extra
1245 : * fd's we need such as log files etc...
1246 : */
1247 77 : real_lim = set_maxfiles(request_max + MAX_OPEN_FUDGEFACTOR);
1248 :
1249 77 : real_max = real_lim - MAX_OPEN_FUDGEFACTOR;
1250 :
1251 77 : if (real_max + FILE_HANDLE_OFFSET + MAX_OPEN_PIPES > 65536) {
1252 0 : real_max = 65536 - FILE_HANDLE_OFFSET - MAX_OPEN_PIPES;
1253 : }
1254 :
1255 77 : if (real_max != request_max) {
1256 0 : DEBUG(1, ("file_init_global: Information only: requested %d "
1257 : "open files, %d are available.\n",
1258 : request_max, real_max));
1259 : }
1260 :
1261 77 : SMB_ASSERT(real_max > 100);
1262 :
1263 77 : files_max_open_fds = real_max;
1264 77 : return true;
1265 : }
1266 :
1267 31481 : bool file_init(struct smbd_server_connection *sconn)
1268 : {
1269 : bool ok;
1270 :
1271 31481 : ok = file_init_global();
1272 31481 : if (!ok) {
1273 0 : return false;
1274 : }
1275 :
1276 31481 : sconn->real_max_open_files = files_max_open_fds;
1277 :
1278 31481 : return true;
1279 : }
1280 :
1281 : /****************************************************************************
1282 : Close files open by a specified vuid.
1283 : ****************************************************************************/
1284 :
1285 : struct file_close_user_state {
1286 : uint64_t vuid;
1287 : bool fsp_left_behind;
1288 : };
1289 :
1290 5002 : static struct files_struct *file_close_user_fn(
1291 : struct files_struct *fsp,
1292 : void *private_data)
1293 : {
1294 5002 : struct file_close_user_state *state = private_data;
1295 : bool did_close;
1296 :
1297 5002 : if (fsp->vuid != state->vuid) {
1298 3416 : return NULL;
1299 : }
1300 :
1301 1586 : did_close = close_file_in_loop(fsp);
1302 1586 : if (!did_close) {
1303 72 : state->fsp_left_behind = true;
1304 : }
1305 :
1306 1586 : return NULL;
1307 : }
1308 :
1309 31322 : void file_close_user(struct smbd_server_connection *sconn, uint64_t vuid)
1310 : {
1311 31322 : struct file_close_user_state state = { .vuid = vuid };
1312 :
1313 31322 : files_forall(sconn, file_close_user_fn, &state);
1314 :
1315 31322 : if (state.fsp_left_behind) {
1316 36 : state.fsp_left_behind = false;
1317 36 : files_forall(sconn, file_close_user_fn, &state);
1318 36 : SMB_ASSERT(!state.fsp_left_behind);
1319 : }
1320 31322 : }
1321 :
1322 : /*
1323 : * Walk the files table until "fn" returns non-NULL
1324 : */
1325 :
1326 241862 : struct files_struct *files_forall(
1327 : struct smbd_server_connection *sconn,
1328 : struct files_struct *(*fn)(struct files_struct *fsp,
1329 : void *private_data),
1330 : void *private_data)
1331 : {
1332 : struct files_struct *fsp, *next;
1333 :
1334 487171 : for (fsp = sconn->files; fsp; fsp = next) {
1335 : struct files_struct *ret;
1336 247261 : next = fsp->next;
1337 247261 : ret = fn(fsp, private_data);
1338 247261 : if (ret != NULL) {
1339 1952 : return ret;
1340 : }
1341 : }
1342 239910 : return NULL;
1343 : }
1344 :
1345 : /****************************************************************************
1346 : Find a fsp given a file descriptor.
1347 : ****************************************************************************/
1348 :
1349 0 : files_struct *file_find_fd(struct smbd_server_connection *sconn, int fd)
1350 : {
1351 0 : int count=0;
1352 : files_struct *fsp;
1353 :
1354 0 : for (fsp=sconn->files; fsp; fsp=fsp->next,count++) {
1355 0 : if (fsp_get_pathref_fd(fsp) == fd) {
1356 0 : if (count > 10) {
1357 0 : DLIST_PROMOTE(sconn->files, fsp);
1358 : }
1359 0 : return fsp;
1360 : }
1361 : }
1362 :
1363 0 : return NULL;
1364 : }
1365 :
1366 : /****************************************************************************
1367 : Find a fsp given a device, inode and file_id.
1368 : ****************************************************************************/
1369 :
1370 14666 : files_struct *file_find_dif(struct smbd_server_connection *sconn,
1371 : struct file_id id, unsigned long gen_id)
1372 : {
1373 14666 : int count=0;
1374 : files_struct *fsp;
1375 :
1376 14666 : if (gen_id == 0) {
1377 0 : return NULL;
1378 : }
1379 :
1380 212066 : for (fsp = sconn->files; fsp; fsp = fsp->next,count++) {
1381 : /*
1382 : * We can have a fsp->fh->fd == -1 here as it could be a stat
1383 : * open.
1384 : */
1385 212066 : if (!file_id_equal(&fsp->file_id, &id)) {
1386 18312 : continue;
1387 : }
1388 193754 : if (!fsp->fsp_flags.is_fsa) {
1389 22564 : continue;
1390 : }
1391 171190 : if (fh_get_gen_id(fsp->fh) != gen_id) {
1392 156524 : continue;
1393 : }
1394 14666 : if (count > 10) {
1395 4822 : DLIST_PROMOTE(sconn->files, fsp);
1396 : }
1397 : /* Paranoia check. */
1398 14666 : if ((fsp_get_pathref_fd(fsp) == -1) &&
1399 0 : (fsp->oplock_type != NO_OPLOCK &&
1400 0 : fsp->oplock_type != LEASE_OPLOCK))
1401 : {
1402 : struct file_id_buf idbuf;
1403 :
1404 0 : DBG_ERR("file %s file_id = "
1405 : "%s, gen = %u oplock_type = %u is a "
1406 : "stat open with oplock type !\n",
1407 : fsp_str_dbg(fsp),
1408 : file_id_str_buf(fsp->file_id, &idbuf),
1409 : (unsigned int)fh_get_gen_id(fsp->fh),
1410 : (unsigned int)fsp->oplock_type);
1411 0 : smb_panic("file_find_dif");
1412 : }
1413 14666 : return fsp;
1414 : }
1415 :
1416 0 : return NULL;
1417 : }
1418 :
1419 : /****************************************************************************
1420 : Find the first fsp given a device and inode.
1421 : We use a singleton cache here to speed up searching from getfilepathinfo
1422 : calls.
1423 : ****************************************************************************/
1424 :
1425 10751 : files_struct *file_find_di_first(struct smbd_server_connection *sconn,
1426 : struct file_id id,
1427 : bool need_fsa)
1428 : {
1429 : files_struct *fsp;
1430 :
1431 10751 : if (file_id_equal(&sconn->fsp_fi_cache.id, &id)) {
1432 : /* Positive or negative cache hit. */
1433 0 : return sconn->fsp_fi_cache.fsp;
1434 : }
1435 :
1436 10751 : sconn->fsp_fi_cache.id = id;
1437 :
1438 34457 : for (fsp=sconn->files;fsp;fsp=fsp->next) {
1439 26467 : if (need_fsa && !fsp->fsp_flags.is_fsa) {
1440 18609 : continue;
1441 : }
1442 7858 : if (file_id_equal(&fsp->file_id, &id)) {
1443 : /* Setup positive cache. */
1444 2761 : sconn->fsp_fi_cache.fsp = fsp;
1445 2761 : return fsp;
1446 : }
1447 : }
1448 :
1449 : /* Setup negative cache. */
1450 7990 : sconn->fsp_fi_cache.fsp = NULL;
1451 7990 : return NULL;
1452 : }
1453 :
1454 : /****************************************************************************
1455 : Find the next fsp having the same device and inode.
1456 : ****************************************************************************/
1457 :
1458 1270 : files_struct *file_find_di_next(files_struct *start_fsp,
1459 : bool need_fsa)
1460 : {
1461 : files_struct *fsp;
1462 :
1463 1783 : for (fsp = start_fsp->next;fsp;fsp=fsp->next) {
1464 668 : if (need_fsa && !fsp->fsp_flags.is_fsa) {
1465 0 : continue;
1466 : }
1467 668 : if (file_id_equal(&fsp->file_id, &start_fsp->file_id)) {
1468 155 : return fsp;
1469 : }
1470 : }
1471 :
1472 1115 : return NULL;
1473 : }
1474 :
1475 4 : struct files_struct *file_find_one_fsp_from_lease_key(
1476 : struct smbd_server_connection *sconn,
1477 : const struct smb2_lease_key *lease_key)
1478 : {
1479 : struct files_struct *fsp;
1480 :
1481 6 : for (fsp = sconn->files; fsp; fsp=fsp->next) {
1482 10 : if ((fsp->lease != NULL) &&
1483 4 : (fsp->lease->lease.lease_key.data[0] ==
1484 8 : lease_key->data[0]) &&
1485 4 : (fsp->lease->lease.lease_key.data[1] ==
1486 4 : lease_key->data[1])) {
1487 4 : return fsp;
1488 : }
1489 : }
1490 0 : return NULL;
1491 : }
1492 :
1493 : /****************************************************************************
1494 : Find any fsp open with a pathname below that of an already open path.
1495 : ****************************************************************************/
1496 :
1497 12 : bool file_find_subpath(files_struct *dir_fsp)
1498 : {
1499 : files_struct *fsp;
1500 : size_t dlen;
1501 12 : char *d_fullname = NULL;
1502 :
1503 18 : d_fullname = talloc_asprintf(talloc_tos(), "%s/%s",
1504 12 : dir_fsp->conn->connectpath,
1505 12 : dir_fsp->fsp_name->base_name);
1506 :
1507 12 : if (!d_fullname) {
1508 0 : return false;
1509 : }
1510 :
1511 12 : dlen = strlen(d_fullname);
1512 :
1513 58 : for (fsp=dir_fsp->conn->sconn->files; fsp; fsp=fsp->next) {
1514 : char *d1_fullname;
1515 :
1516 48 : if (fsp == dir_fsp) {
1517 12 : continue;
1518 : }
1519 :
1520 54 : d1_fullname = talloc_asprintf(talloc_tos(),
1521 : "%s/%s",
1522 36 : fsp->conn->connectpath,
1523 36 : fsp->fsp_name->base_name);
1524 :
1525 : /*
1526 : * If the open file has a path that is a longer
1527 : * component, then it's a subpath.
1528 : */
1529 42 : if (strnequal(d_fullname, d1_fullname, dlen) &&
1530 12 : (d1_fullname[dlen] == '/')) {
1531 2 : TALLOC_FREE(d1_fullname);
1532 2 : TALLOC_FREE(d_fullname);
1533 2 : return true;
1534 : }
1535 34 : TALLOC_FREE(d1_fullname);
1536 : }
1537 :
1538 10 : TALLOC_FREE(d_fullname);
1539 10 : return false;
1540 : }
1541 :
1542 : /****************************************************************************
1543 : Free up a fsp.
1544 : ****************************************************************************/
1545 :
1546 6685845 : static void fsp_free(files_struct *fsp)
1547 : {
1548 6685845 : struct smbd_server_connection *sconn = fsp->conn->sconn;
1549 :
1550 6685845 : if (fsp == sconn->fsp_fi_cache.fsp) {
1551 474 : ZERO_STRUCT(sconn->fsp_fi_cache);
1552 : }
1553 :
1554 6685845 : DLIST_REMOVE(sconn->files, fsp);
1555 6685845 : SMB_ASSERT(sconn->num_files > 0);
1556 6685845 : sconn->num_files--;
1557 :
1558 6685845 : TALLOC_FREE(fsp->fake_file_handle);
1559 :
1560 6685845 : if (fh_get_refcount(fsp->fh) == 1) {
1561 6685733 : TALLOC_FREE(fsp->fh);
1562 : } else {
1563 112 : size_t new_refcount = fh_get_refcount(fsp->fh) - 1;
1564 112 : fh_set_refcount(fsp->fh, new_refcount);
1565 : }
1566 :
1567 6685845 : if (fsp->lease != NULL) {
1568 1016 : if (fsp->lease->ref_count == 1) {
1569 804 : TALLOC_FREE(fsp->lease);
1570 : } else {
1571 212 : fsp->lease->ref_count--;
1572 : }
1573 : }
1574 :
1575 6685845 : fsp->conn->num_files_open--;
1576 :
1577 12087109 : if (fsp->fsp_name != NULL &&
1578 6447340 : fsp->fsp_name->fsp_link != NULL)
1579 : {
1580 : /*
1581 : * Free fsp_link of fsp->fsp_name. To do this in the correct
1582 : * talloc destructor order we have to do it here. The
1583 : * talloc_free() of the link should set the fsp pointer to NULL.
1584 : */
1585 6433932 : TALLOC_FREE(fsp->fsp_name->fsp_link);
1586 6433932 : SMB_ASSERT(fsp->fsp_name->fsp == NULL);
1587 : }
1588 :
1589 : /* this is paranoia, just in case someone tries to reuse the
1590 : information */
1591 6685845 : ZERO_STRUCTP(fsp);
1592 :
1593 : /* fsp->fsp_name is a talloc child and is free'd automatically. */
1594 6685845 : TALLOC_FREE(fsp);
1595 6685845 : }
1596 :
1597 : /*
1598 : * Rundown of all smb-related sub-structures of an fsp
1599 : */
1600 7268166 : void fsp_unbind_smb(struct smb_request *req, files_struct *fsp)
1601 : {
1602 7268166 : if (fsp == fsp->conn->cwd_fsp) {
1603 0 : return;
1604 : }
1605 :
1606 7268166 : if (fsp->notify) {
1607 1851 : size_t len = fsp_fullbasepath(fsp, NULL, 0);
1608 1851 : char fullpath[len+1];
1609 :
1610 1851 : fsp_fullbasepath(fsp, fullpath, sizeof(fullpath));
1611 :
1612 : /*
1613 : * Avoid /. at the end of the path name. notify can't
1614 : * deal with it.
1615 : */
1616 1903 : if (len > 1 && fullpath[len-1] == '.' &&
1617 80 : fullpath[len-2] == '/') {
1618 80 : fullpath[len-2] = '\0';
1619 : }
1620 :
1621 1851 : notify_remove(fsp->conn->sconn->notify_ctx, fsp, fullpath);
1622 1851 : TALLOC_FREE(fsp->notify);
1623 : }
1624 :
1625 : /* Ensure this event will never fire. */
1626 7268166 : TALLOC_FREE(fsp->update_write_time_event);
1627 :
1628 7268166 : if (fsp->op != NULL) {
1629 570602 : fsp->op->compat = NULL;
1630 : }
1631 7268166 : TALLOC_FREE(fsp->op);
1632 :
1633 7268166 : if ((req != NULL) && (fsp == req->chain_fsp)) {
1634 560117 : req->chain_fsp = NULL;
1635 : }
1636 :
1637 : /*
1638 : * Clear all possible chained fsp
1639 : * pointers in the SMB2 request queue.
1640 : */
1641 7268166 : remove_smb2_chained_fsp(fsp);
1642 : }
1643 :
1644 6685845 : void file_free(struct smb_request *req, files_struct *fsp)
1645 : {
1646 6685845 : struct smbd_server_connection *sconn = fsp->conn->sconn;
1647 6685845 : uint64_t fnum = fsp->fnum;
1648 :
1649 6685845 : fsp_unbind_smb(req, fsp);
1650 :
1651 : /* Drop all remaining extensions. */
1652 6685845 : vfs_remove_all_fsp_extensions(fsp);
1653 :
1654 6685845 : fsp_free(fsp);
1655 :
1656 6685845 : DBG_INFO("freed files structure %"PRIu64" (%zu used)\n",
1657 : fnum,
1658 : sconn->num_files);
1659 6685845 : }
1660 :
1661 : /****************************************************************************
1662 : Get an fsp from a packet given a 16 bit fnum.
1663 : ****************************************************************************/
1664 :
1665 210218 : files_struct *file_fsp(struct smb_request *req, uint16_t fid)
1666 : {
1667 : struct smbXsrv_open *op;
1668 : NTSTATUS status;
1669 210218 : NTTIME now = 0;
1670 : files_struct *fsp;
1671 :
1672 210218 : if (req == NULL) {
1673 : /*
1674 : * We should never get here. req==NULL could in theory
1675 : * only happen from internal opens with a non-zero
1676 : * root_dir_fid. Internal opens just don't do that, at
1677 : * least they are not supposed to do so. And if they
1678 : * start to do so, they better fake up a smb_request
1679 : * from which we get the right smbd_server_conn. While
1680 : * this should never happen, let's return NULL here.
1681 : */
1682 0 : return NULL;
1683 : }
1684 :
1685 210218 : if (req->chain_fsp != NULL) {
1686 88 : if (req->chain_fsp->fsp_flags.closing) {
1687 0 : return NULL;
1688 : }
1689 88 : return req->chain_fsp;
1690 : }
1691 :
1692 210130 : if (req->xconn == NULL) {
1693 0 : return NULL;
1694 : }
1695 :
1696 210130 : now = timeval_to_nttime(&req->request_time);
1697 :
1698 210130 : status = smb1srv_open_lookup(req->xconn,
1699 : fid, now, &op);
1700 210130 : if (!NT_STATUS_IS_OK(status)) {
1701 2686 : return NULL;
1702 : }
1703 :
1704 207444 : fsp = op->compat;
1705 207444 : if (fsp == NULL) {
1706 0 : return NULL;
1707 : }
1708 :
1709 207444 : if (fsp->fsp_flags.closing) {
1710 0 : return NULL;
1711 : }
1712 :
1713 207444 : req->chain_fsp = fsp;
1714 207444 : return fsp;
1715 : }
1716 :
1717 816203 : struct files_struct *file_fsp_get(struct smbd_smb2_request *smb2req,
1718 : uint64_t persistent_id,
1719 : uint64_t volatile_id)
1720 : {
1721 : struct smbXsrv_open *op;
1722 : NTSTATUS status;
1723 816203 : NTTIME now = 0;
1724 : struct files_struct *fsp;
1725 :
1726 816203 : now = timeval_to_nttime(&smb2req->request_time);
1727 :
1728 816203 : status = smb2srv_open_lookup(smb2req->xconn,
1729 : persistent_id, volatile_id,
1730 : now, &op);
1731 816203 : if (!NT_STATUS_IS_OK(status)) {
1732 15424 : return NULL;
1733 : }
1734 :
1735 800779 : fsp = op->compat;
1736 800779 : if (fsp == NULL) {
1737 0 : return NULL;
1738 : }
1739 :
1740 800779 : if (smb2req->tcon == NULL) {
1741 0 : return NULL;
1742 : }
1743 :
1744 800779 : if (smb2req->tcon->compat != fsp->conn) {
1745 4 : return NULL;
1746 : }
1747 :
1748 800775 : if (smb2req->session == NULL) {
1749 0 : return NULL;
1750 : }
1751 :
1752 800775 : if (smb2req->session->global->session_wire_id != fsp->vuid) {
1753 0 : return NULL;
1754 : }
1755 :
1756 800775 : if (fsp->fsp_flags.closing) {
1757 0 : return NULL;
1758 : }
1759 :
1760 800775 : return fsp;
1761 : }
1762 :
1763 1616844 : struct files_struct *file_fsp_smb2(struct smbd_smb2_request *smb2req,
1764 : uint64_t persistent_id,
1765 : uint64_t volatile_id)
1766 : {
1767 : struct files_struct *fsp;
1768 :
1769 1616844 : if (smb2req->compat_chain_fsp != NULL) {
1770 800641 : if (smb2req->compat_chain_fsp->fsp_flags.closing) {
1771 0 : return NULL;
1772 : }
1773 800641 : return smb2req->compat_chain_fsp;
1774 : }
1775 :
1776 816203 : fsp = file_fsp_get(smb2req, persistent_id, volatile_id);
1777 816203 : if (fsp == NULL) {
1778 15428 : return NULL;
1779 : }
1780 :
1781 800775 : smb2req->compat_chain_fsp = fsp;
1782 800775 : return fsp;
1783 : }
1784 :
1785 : /****************************************************************************
1786 : Duplicate the file handle part for a DOS or FCB open.
1787 : ****************************************************************************/
1788 :
1789 112 : NTSTATUS dup_file_fsp(
1790 : files_struct *from,
1791 : uint32_t access_mask,
1792 : files_struct *to)
1793 : {
1794 : size_t new_refcount;
1795 :
1796 : /* this can never happen for print files */
1797 112 : SMB_ASSERT(from->print_file == NULL);
1798 :
1799 112 : TALLOC_FREE(to->fh);
1800 :
1801 112 : to->fh = from->fh;
1802 112 : new_refcount = fh_get_refcount(to->fh) + 1;
1803 112 : fh_set_refcount(to->fh, new_refcount);
1804 :
1805 112 : to->file_id = from->file_id;
1806 112 : to->initial_allocation_size = from->initial_allocation_size;
1807 112 : to->file_pid = from->file_pid;
1808 112 : to->vuid = from->vuid;
1809 112 : to->open_time = from->open_time;
1810 112 : to->access_mask = access_mask;
1811 112 : to->oplock_type = from->oplock_type;
1812 112 : to->fsp_flags.can_lock = from->fsp_flags.can_lock;
1813 112 : to->fsp_flags.can_read = ((access_mask & FILE_READ_DATA) != 0);
1814 112 : to->fsp_flags.can_write =
1815 224 : CAN_WRITE(from->conn) &&
1816 112 : ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
1817 112 : to->fsp_flags.modified = from->fsp_flags.modified;
1818 112 : to->fsp_flags.is_directory = from->fsp_flags.is_directory;
1819 112 : to->fsp_flags.aio_write_behind = from->fsp_flags.aio_write_behind;
1820 112 : to->fsp_flags.is_fsa = from->fsp_flags.is_fsa;
1821 112 : to->fsp_flags.is_pathref = from->fsp_flags.is_pathref;
1822 112 : to->fsp_flags.have_proc_fds = from->fsp_flags.have_proc_fds;
1823 112 : to->fsp_flags.is_dirfsp = from->fsp_flags.is_dirfsp;
1824 :
1825 112 : return fsp_set_smb_fname(to, from->fsp_name);
1826 : }
1827 :
1828 : /**
1829 : * Return a jenkins hash of a pathname on a connection.
1830 : */
1831 :
1832 6573699 : NTSTATUS file_name_hash(connection_struct *conn,
1833 : const char *name, uint32_t *p_name_hash)
1834 : {
1835 : char tmpbuf[PATH_MAX];
1836 : char *fullpath, *to_free;
1837 : ssize_t len;
1838 : TDB_DATA key;
1839 :
1840 : /* Set the hash of the full pathname. */
1841 :
1842 6573699 : if (name[0] == '/') {
1843 1707865 : strlcpy(tmpbuf, name, sizeof(tmpbuf));
1844 1707865 : fullpath = tmpbuf;
1845 1707865 : len = strlen(fullpath);
1846 1707865 : to_free = NULL;
1847 : } else {
1848 4865834 : len = full_path_tos(conn->connectpath,
1849 : name,
1850 : tmpbuf,
1851 : sizeof(tmpbuf),
1852 : &fullpath,
1853 : &to_free);
1854 : }
1855 6573699 : if (len == -1) {
1856 0 : return NT_STATUS_NO_MEMORY;
1857 : }
1858 6573699 : key = (TDB_DATA) { .dptr = (uint8_t *)fullpath, .dsize = len+1 };
1859 6573699 : *p_name_hash = tdb_jenkins_hash(&key);
1860 :
1861 6573699 : DEBUG(10,("file_name_hash: %s hash 0x%x\n",
1862 : fullpath,
1863 : (unsigned int)*p_name_hash ));
1864 :
1865 6573699 : TALLOC_FREE(to_free);
1866 6573699 : return NT_STATUS_OK;
1867 : }
1868 :
1869 6445688 : static NTSTATUS fsp_attach_smb_fname(struct files_struct *fsp,
1870 : struct smb_filename **_smb_fname)
1871 : {
1872 6445688 : struct smb_filename *smb_fname_new = talloc_move(fsp, _smb_fname);
1873 6445688 : const char *name_str = NULL;
1874 6445688 : uint32_t name_hash = 0;
1875 : NTSTATUS status;
1876 :
1877 6445688 : name_str = smb_fname_str_dbg(smb_fname_new);
1878 6445688 : if (name_str == NULL) {
1879 0 : return NT_STATUS_NO_MEMORY;
1880 : }
1881 :
1882 6445688 : status = file_name_hash(fsp->conn,
1883 : name_str,
1884 : &name_hash);
1885 6445688 : if (!NT_STATUS_IS_OK(status)) {
1886 0 : return status;
1887 : }
1888 :
1889 6445688 : status = fsp_smb_fname_link(fsp,
1890 : &smb_fname_new->fsp_link,
1891 : &smb_fname_new->fsp);
1892 6445688 : if (!NT_STATUS_IS_OK(status)) {
1893 0 : return status;
1894 : }
1895 :
1896 6445688 : fsp->name_hash = name_hash;
1897 6445688 : fsp->fsp_name = smb_fname_new;
1898 6445688 : *_smb_fname = NULL;
1899 6445688 : return NT_STATUS_OK;
1900 : }
1901 :
1902 : /**
1903 : * The only way that the fsp->fsp_name field should ever be set.
1904 : */
1905 1112775 : NTSTATUS fsp_set_smb_fname(struct files_struct *fsp,
1906 : const struct smb_filename *smb_fname_in)
1907 : {
1908 1112775 : struct smb_filename *smb_fname_old = fsp->fsp_name;
1909 1112775 : struct smb_filename *smb_fname_new = NULL;
1910 : NTSTATUS status;
1911 :
1912 1112775 : smb_fname_new = cp_smb_filename(fsp, smb_fname_in);
1913 1112775 : if (smb_fname_new == NULL) {
1914 0 : return NT_STATUS_NO_MEMORY;
1915 : }
1916 :
1917 1112775 : status = fsp_attach_smb_fname(fsp, &smb_fname_new);
1918 1112775 : if (!NT_STATUS_IS_OK(status)) {
1919 0 : TALLOC_FREE(smb_fname_new);
1920 0 : return status;
1921 : }
1922 :
1923 1112775 : if (smb_fname_old != NULL) {
1924 608339 : smb_fname_fsp_unlink(smb_fname_old);
1925 608339 : TALLOC_FREE(smb_fname_old);
1926 : }
1927 :
1928 1112775 : return NT_STATUS_OK;
1929 : }
1930 :
1931 7406 : size_t fsp_fullbasepath(struct files_struct *fsp, char *buf, size_t buflen)
1932 : {
1933 7406 : int len = 0;
1934 7406 : char tmp_buf[1] = {'\0'};
1935 :
1936 : /*
1937 : * Don't pass NULL buffer to snprintf (to satisfy static checker)
1938 : * Some callers will call this function with NULL for buf and
1939 : * 0 for buflen in order to get length of fullbasepath (without
1940 : * needing to allocate or write to buf)
1941 : */
1942 7406 : if (buf == NULL) {
1943 3704 : buf = tmp_buf;
1944 3704 : SMB_ASSERT(buflen==0);
1945 : }
1946 :
1947 7406 : len = snprintf(buf, buflen, "%s/%s", fsp->conn->connectpath,
1948 7406 : fsp->fsp_name->base_name);
1949 7406 : SMB_ASSERT(len>0);
1950 :
1951 7406 : return len;
1952 : }
1953 :
1954 6130431 : void fsp_set_base_fsp(struct files_struct *fsp, struct files_struct *base_fsp)
1955 : {
1956 6130431 : SMB_ASSERT(fsp->stream_fsp == NULL);
1957 6130431 : if (base_fsp != NULL) {
1958 14819 : SMB_ASSERT(base_fsp->base_fsp == NULL);
1959 14819 : SMB_ASSERT(base_fsp->stream_fsp == NULL);
1960 : }
1961 :
1962 6130431 : if (fsp->base_fsp != NULL) {
1963 7831 : SMB_ASSERT(fsp->base_fsp->stream_fsp == fsp);
1964 7831 : fsp->base_fsp->stream_fsp = NULL;
1965 : }
1966 :
1967 6130431 : fsp->base_fsp = base_fsp;
1968 6130431 : if (fsp->base_fsp != NULL) {
1969 14819 : fsp->base_fsp->stream_fsp = fsp;
1970 : }
1971 6130431 : }
1972 :
1973 19293148 : bool fsp_is_alternate_stream(const struct files_struct *fsp)
1974 : {
1975 19293148 : return (fsp->base_fsp != NULL);
1976 : }
1977 :
1978 460670 : struct files_struct *metadata_fsp(struct files_struct *fsp)
1979 : {
1980 460670 : if (fsp_is_alternate_stream(fsp)) {
1981 2145 : return fsp->base_fsp;
1982 : }
1983 458525 : return fsp;
1984 : }
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