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Ensure we can't create a file using SMB2_CREATE with an invalid EA list.
[Samba.git] / source3 / smbd / smb2_create.c
blobedbd50fd9045bd690a5f59ec3a6a4a585ee324bd
1 /*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) Jeremy Allison 2010
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "printing.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "../libcli/smb/smb_common.h"
27 #include "../librpc/gen_ndr/ndr_security.h"
28 #include "../lib/util/tevent_ntstatus.h"
29 #include "messages.h"
30
31 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
32 {
33 switch(in_oplock_level) {
34 case SMB2_OPLOCK_LEVEL_NONE:
35 return NO_OPLOCK;
36 case SMB2_OPLOCK_LEVEL_II:
37 return LEVEL_II_OPLOCK;
38 case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
39 return EXCLUSIVE_OPLOCK;
40 case SMB2_OPLOCK_LEVEL_BATCH:
41 return BATCH_OPLOCK;
42 case SMB2_OPLOCK_LEVEL_LEASE:
43 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
44 "LEASE_OPLOCK_REQUESTED\n"));
45 return NO_OPLOCK;
46 default:
47 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
48 "unknown level %u\n",
49 (unsigned int)in_oplock_level));
50 return NO_OPLOCK;
51 }
52 }
53
54 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
55 {
56 if (BATCH_OPLOCK_TYPE(oplock_type)) {
57 return SMB2_OPLOCK_LEVEL_BATCH;
58 } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
59 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
60 } else if (oplock_type == LEVEL_II_OPLOCK) {
61 /*
62 * Don't use LEVEL_II_OPLOCK_TYPE here as
63 * this also includes FAKE_LEVEL_II_OPLOCKs
64 * which are internal only.
65 */
66 return SMB2_OPLOCK_LEVEL_II;
67 } else {
68 return SMB2_OPLOCK_LEVEL_NONE;
69 }
70 }
71
72 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
73 struct tevent_context *ev,
74 struct smbd_smb2_request *smb2req,
75 uint8_t in_oplock_level,
76 uint32_t in_impersonation_level,
77 uint32_t in_desired_access,
78 uint32_t in_file_attributes,
79 uint32_t in_share_access,
80 uint32_t in_create_disposition,
81 uint32_t in_create_options,
82 const char *in_name,
83 struct smb2_create_blobs in_context_blobs);
84 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
85 TALLOC_CTX *mem_ctx,
86 uint8_t *out_oplock_level,
87 uint32_t *out_create_action,
88 NTTIME *out_creation_time,
89 NTTIME *out_last_access_time,
90 NTTIME *out_last_write_time,
91 NTTIME *out_change_time,
92 uint64_t *out_allocation_size,
93 uint64_t *out_end_of_file,
94 uint32_t *out_file_attributes,
95 uint64_t *out_file_id_persistent,
96 uint64_t *out_file_id_volatile,
97 struct smb2_create_blobs *out_context_blobs);
98
99 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
100 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
101 {
102 const uint8_t *inbody;
103 const struct iovec *indyniov;
104 uint8_t in_oplock_level;
105 uint32_t in_impersonation_level;
106 uint32_t in_desired_access;
107 uint32_t in_file_attributes;
108 uint32_t in_share_access;
109 uint32_t in_create_disposition;
110 uint32_t in_create_options;
111 uint16_t in_name_offset;
112 uint16_t in_name_length;
113 DATA_BLOB in_name_buffer;
114 char *in_name_string;
115 size_t in_name_string_size;
116 uint32_t name_offset = 0;
117 uint32_t name_available_length = 0;
118 uint32_t in_context_offset;
119 uint32_t in_context_length;
120 DATA_BLOB in_context_buffer;
121 struct smb2_create_blobs in_context_blobs;
122 uint32_t context_offset = 0;
123 uint32_t context_available_length = 0;
124 uint32_t dyn_offset;
125 NTSTATUS status;
126 bool ok;
127 struct tevent_req *tsubreq;
128
129 status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
130 if (!NT_STATUS_IS_OK(status)) {
131 return smbd_smb2_request_error(smb2req, status);
132 }
133 inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
134
135 in_oplock_level = CVAL(inbody, 0x03);
136 in_impersonation_level = IVAL(inbody, 0x04);
137 in_desired_access = IVAL(inbody, 0x18);
138 in_file_attributes = IVAL(inbody, 0x1C);
139 in_share_access = IVAL(inbody, 0x20);
140 in_create_disposition = IVAL(inbody, 0x24);
141 in_create_options = IVAL(inbody, 0x28);
142 in_name_offset = SVAL(inbody, 0x2C);
143 in_name_length = SVAL(inbody, 0x2E);
144 in_context_offset = IVAL(inbody, 0x30);
145 in_context_length = IVAL(inbody, 0x34);
146
147 /*
148 * First check if the dynamic name and context buffers
149 * are correctly specified.
150 *
151 * Note: That we don't check if the name and context buffers
152 * overlap
153 */
154
155 dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
156
157 if (in_name_offset == 0 && in_name_length == 0) {
158 /* This is ok */
159 name_offset = 0;
160 } else if (in_name_offset < dyn_offset) {
161 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
162 } else {
163 name_offset = in_name_offset - dyn_offset;
164 }
165
166 indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
167
168 if (name_offset > indyniov->iov_len) {
169 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
170 }
171
172 name_available_length = indyniov->iov_len - name_offset;
173
174 if (in_name_length > name_available_length) {
175 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
176 }
177
178 in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
179 in_name_buffer.length = in_name_length;
180
181 if (in_context_offset == 0 && in_context_length == 0) {
182 /* This is ok */
183 context_offset = 0;
184 } else if (in_context_offset < dyn_offset) {
185 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
186 } else {
187 context_offset = in_context_offset - dyn_offset;
188 }
189
190 if (context_offset > indyniov->iov_len) {
191 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
192 }
193
194 context_available_length = indyniov->iov_len - context_offset;
195
196 if (in_context_length > context_available_length) {
197 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
198 }
199
200 in_context_buffer.data = (uint8_t *)indyniov->iov_base +
201 context_offset;
202 in_context_buffer.length = in_context_length;
203
204 /*
205 * Now interpret the name and context buffers
206 */
207
208 ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
209 in_name_buffer.data,
210 in_name_buffer.length,
211 &in_name_string,
212 &in_name_string_size);
213 if (!ok) {
214 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
215 }
216
217 if (in_name_buffer.length == 0) {
218 in_name_string_size = 0;
219 }
220
221 if (strlen(in_name_string) != in_name_string_size) {
222 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
223 }
224
225 ZERO_STRUCT(in_context_blobs);
226 status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
227 if (!NT_STATUS_IS_OK(status)) {
228 return smbd_smb2_request_error(smb2req, status);
229 }
230
231 tsubreq = smbd_smb2_create_send(smb2req,
232 smb2req->sconn->ev_ctx,
233 smb2req,
234 in_oplock_level,
235 in_impersonation_level,
236 in_desired_access,
237 in_file_attributes,
238 in_share_access,
239 in_create_disposition,
240 in_create_options,
241 in_name_string,
242 in_context_blobs);
243 if (tsubreq == NULL) {
244 smb2req->subreq = NULL;
245 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
246 }
247 tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
248
249 /*
250 * For now we keep the logic that we do not send STATUS_PENDING
251 * for sharing violations, so we just wait 2 seconds.
252 *
253 * TODO: we need more tests for this.
254 */
255 return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
256 }
257
258 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
259 {
260 uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
261 return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
262 }
263
264 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
265 {
266 struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
267 struct smbd_smb2_request);
268 DATA_BLOB outbody;
269 DATA_BLOB outdyn;
270 uint8_t out_oplock_level = 0;
271 uint32_t out_create_action = 0;
272 NTTIME out_creation_time = 0;
273 NTTIME out_last_access_time = 0;
274 NTTIME out_last_write_time = 0;
275 NTTIME out_change_time = 0;
276 uint64_t out_allocation_size = 0;
277 uint64_t out_end_of_file = 0;
278 uint32_t out_file_attributes = 0;
279 uint64_t out_file_id_persistent = 0;
280 uint64_t out_file_id_volatile = 0;
281 struct smb2_create_blobs out_context_blobs;
282 DATA_BLOB out_context_buffer;
283 uint16_t out_context_buffer_offset = 0;
284 NTSTATUS status;
285 NTSTATUS error; /* transport error */
286
287 status = smbd_smb2_create_recv(tsubreq,
288 smb2req,
289 &out_oplock_level,
290 &out_create_action,
291 &out_creation_time,
292 &out_last_access_time,
293 &out_last_write_time,
294 &out_change_time,
295 &out_allocation_size,
296 &out_end_of_file,
297 &out_file_attributes,
298 &out_file_id_persistent,
299 &out_file_id_volatile,
300 &out_context_blobs);
301 if (!NT_STATUS_IS_OK(status)) {
302 error = smbd_smb2_request_error(smb2req, status);
303 if (!NT_STATUS_IS_OK(error)) {
304 smbd_server_connection_terminate(smb2req->sconn,
305 nt_errstr(error));
306 return;
307 }
308 return;
309 }
310
311 status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
312 if (!NT_STATUS_IS_OK(status)) {
313 error = smbd_smb2_request_error(smb2req, status);
314 if (!NT_STATUS_IS_OK(error)) {
315 smbd_server_connection_terminate(smb2req->sconn,
316 nt_errstr(error));
317 return;
318 }
319 return;
320 }
321
322 if (out_context_buffer.length > 0) {
323 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
324 }
325
326 outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
327 if (outbody.data == NULL) {
328 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
329 if (!NT_STATUS_IS_OK(error)) {
330 smbd_server_connection_terminate(smb2req->sconn,
331 nt_errstr(error));
332 return;
333 }
334 return;
335 }
336
337 SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */
338 SCVAL(outbody.data, 0x02,
339 out_oplock_level); /* oplock level */
340 SCVAL(outbody.data, 0x03, 0); /* reserved */
341 SIVAL(outbody.data, 0x04,
342 out_create_action); /* create action */
343 SBVAL(outbody.data, 0x08,
344 out_creation_time); /* creation time */
345 SBVAL(outbody.data, 0x10,
346 out_last_access_time); /* last access time */
347 SBVAL(outbody.data, 0x18,
348 out_last_write_time); /* last write time */
349 SBVAL(outbody.data, 0x20,
350 out_change_time); /* change time */
351 SBVAL(outbody.data, 0x28,
352 out_allocation_size); /* allocation size */
353 SBVAL(outbody.data, 0x30,
354 out_end_of_file); /* end of file */
355 SIVAL(outbody.data, 0x38,
356 out_file_attributes); /* file attributes */
357 SIVAL(outbody.data, 0x3C, 0); /* reserved */
358 SBVAL(outbody.data, 0x40,
359 out_file_id_persistent); /* file id (persistent) */
360 SBVAL(outbody.data, 0x48,
361 out_file_id_volatile); /* file id (volatile) */
362 SIVAL(outbody.data, 0x50,
363 out_context_buffer_offset); /* create contexts offset */
364 SIVAL(outbody.data, 0x54,
365 out_context_buffer.length); /* create contexts length */
366
367 outdyn = out_context_buffer;
368
369 error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
370 if (!NT_STATUS_IS_OK(error)) {
371 smbd_server_connection_terminate(smb2req->sconn,
372 nt_errstr(error));
373 return;
374 }
375 }
376
377 struct smbd_smb2_create_state {
378 struct smbd_smb2_request *smb2req;
379 struct smb_request *smb1req;
380 bool open_was_deferred;
381 struct timed_event *te;
382 struct tevent_immediate *im;
383 struct timeval request_time;
384 struct file_id id;
385 DATA_BLOB private_data;
386 uint8_t out_oplock_level;
387 uint32_t out_create_action;
388 NTTIME out_creation_time;
389 NTTIME out_last_access_time;
390 NTTIME out_last_write_time;
391 NTTIME out_change_time;
392 uint64_t out_allocation_size;
393 uint64_t out_end_of_file;
394 uint32_t out_file_attributes;
395 uint64_t out_file_id_persistent;
396 uint64_t out_file_id_volatile;
397 struct smb2_create_blobs out_context_blobs;
398 };
399
400 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
401 struct tevent_context *ev,
402 struct smbd_smb2_request *smb2req,
403 uint8_t in_oplock_level,
404 uint32_t in_impersonation_level,
405 uint32_t in_desired_access,
406 uint32_t in_file_attributes,
407 uint32_t in_share_access,
408 uint32_t in_create_disposition,
409 uint32_t in_create_options,
410 const char *in_name,
411 struct smb2_create_blobs in_context_blobs)
412 {
413 struct tevent_req *req = NULL;
414 struct smbd_smb2_create_state *state = NULL;
415 NTSTATUS status;
416 struct smb_request *smb1req = NULL;
417 files_struct *result = NULL;
418 int info;
419 struct timespec write_time_ts;
420 struct smb2_create_blobs out_context_blobs;
421 int requested_oplock_level;
422 struct smb2_create_blob *dhnc = NULL;
423 struct smb2_create_blob *dh2c = NULL;
424 struct smbXsrv_open *op = NULL;
425
426 ZERO_STRUCT(out_context_blobs);
427
428 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
429 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
430 } else {
431 requested_oplock_level = in_oplock_level;
432 }
433
434
435 if (smb2req->subreq == NULL) {
436 /* New create call. */
437 req = tevent_req_create(mem_ctx, &state,
438 struct smbd_smb2_create_state);
439 if (req == NULL) {
440 return NULL;
441 }
442 state->smb2req = smb2req;
443
444 smb1req = smbd_smb2_fake_smb_request(smb2req);
445 if (tevent_req_nomem(smb1req, req)) {
446 return tevent_req_post(req, ev);
447 }
448 state->smb1req = smb1req;
449 smb2req->subreq = req;
450 DEBUG(10,("smbd_smb2_create: name[%s]\n",
451 in_name));
452 } else {
453 /* Re-entrant create call. */
454 req = smb2req->subreq;
455 state = tevent_req_data(req,
456 struct smbd_smb2_create_state);
457 smb1req = state->smb1req;
458 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
459 in_name ));
460 }
461
462 dhnc = smb2_create_blob_find(&in_context_blobs,
463 SMB2_CREATE_TAG_DHNC);
464
465 if (dhnc) {
466 if (dhnc->data.length != 16) {
467 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
468 return tevent_req_post(req, ev);
469 }
470 if (in_context_blobs.num_blobs != 1) {
471 /*
472 * DHNC should be the only one.
473 */
474 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
475 return tevent_req_post(req, ev);
476 }
477 }
478
479 dh2c = smb2_create_blob_find(&in_context_blobs,
480 SMB2_CREATE_TAG_DH2C);
481 if (dh2c) {
482 if (dh2c->data.length != 36) {
483 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
484 return tevent_req_post(req, ev);
485 }
486 if (in_context_blobs.num_blobs != 1) {
487 /*
488 * DH2C should be the only one.
489 */
490 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
491 return tevent_req_post(req, ev);
492 }
493 }
494
495 if (IS_IPC(smb1req->conn)) {
496 const char *pipe_name = in_name;
497
498 if (dhnc || dh2c) {
499 /* durable handles are not supported on IPC$ */
500 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
501 return tevent_req_post(req, ev);
502 }
503
504 if (!lp_nt_pipe_support()) {
505 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
506 return tevent_req_post(req, ev);
507 }
508
509 status = open_np_file(smb1req, pipe_name, &result);
510 if (!NT_STATUS_IS_OK(status)) {
511 tevent_req_nterror(req, status);
512 return tevent_req_post(req, ev);
513 }
514 info = FILE_WAS_OPENED;
515 } else if (CAN_PRINT(smb1req->conn)) {
516 if (dhnc || dh2c) {
517 /* durable handles are not supported on printers */
518 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
519 return tevent_req_post(req, ev);
520 }
521
522 status = file_new(smb1req, smb1req->conn, &result);
523 if(!NT_STATUS_IS_OK(status)) {
524 tevent_req_nterror(req, status);
525 return tevent_req_post(req, ev);
526 }
527
528 status = print_spool_open(result, in_name,
529 smb1req->vuid);
530 if (!NT_STATUS_IS_OK(status)) {
531 file_free(smb1req, result);
532 tevent_req_nterror(req, status);
533 return tevent_req_post(req, ev);
534 }
535 info = FILE_WAS_CREATED;
536 } else {
537 char *fname;
538 struct smb2_create_blob *exta = NULL;
539 struct ea_list *ea_list = NULL;
540 struct smb2_create_blob *mxac = NULL;
541 NTTIME max_access_time = 0;
542 struct smb2_create_blob *secd = NULL;
543 struct security_descriptor *sec_desc = NULL;
544 struct smb2_create_blob *dhnq = NULL;
545 struct smb2_create_blob *alsi = NULL;
546 uint64_t allocation_size = 0;
547 struct smb2_create_blob *twrp = NULL;
548 struct smb2_create_blob *qfid = NULL;
549 struct GUID create_guid = GUID_zero();
550 bool update_open = false;
551 bool durable_requested = false;
552 uint32_t durable_timeout_msec = 0;
553 bool do_durable_reconnect = false;
554 struct smb2_create_blob *dh2q = NULL;
555
556 exta = smb2_create_blob_find(&in_context_blobs,
557 SMB2_CREATE_TAG_EXTA);
558 mxac = smb2_create_blob_find(&in_context_blobs,
559 SMB2_CREATE_TAG_MXAC);
560 secd = smb2_create_blob_find(&in_context_blobs,
561 SMB2_CREATE_TAG_SECD);
562 dhnq = smb2_create_blob_find(&in_context_blobs,
563 SMB2_CREATE_TAG_DHNQ);
564 alsi = smb2_create_blob_find(&in_context_blobs,
565 SMB2_CREATE_TAG_ALSI);
566 twrp = smb2_create_blob_find(&in_context_blobs,
567 SMB2_CREATE_TAG_TWRP);
568 qfid = smb2_create_blob_find(&in_context_blobs,
569 SMB2_CREATE_TAG_QFID);
570 dh2q = smb2_create_blob_find(&in_context_blobs,
571 SMB2_CREATE_TAG_DH2Q);
572
573 fname = talloc_strdup(state, in_name);
574 if (tevent_req_nomem(fname, req)) {
575 return tevent_req_post(req, ev);
576 }
577
578 if (exta) {
579 ea_list = read_nttrans_ea_list(mem_ctx,
580 (const char *)exta->data.data, exta->data.length);
581 if (!ea_list) {
582 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
583 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
584 return tevent_req_post(req, ev);
585 }
586
587 if (ea_list_has_invalid_name(ea_list)) {
588 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
589 return tevent_req_post(req, ev);
590 }
591 }
592
593 if (mxac) {
594 if (mxac->data.length == 0) {
595 max_access_time = 0;
596 } else if (mxac->data.length == 8) {
597 max_access_time = BVAL(mxac->data.data, 0);
598 } else {
599 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
600 return tevent_req_post(req, ev);
601 }
602 }
603
604 if (secd) {
605 enum ndr_err_code ndr_err;
606
607 sec_desc = talloc_zero(state, struct security_descriptor);
608 if (tevent_req_nomem(sec_desc, req)) {
609 return tevent_req_post(req, ev);
610 }
611
612 ndr_err = ndr_pull_struct_blob(&secd->data,
613 sec_desc, sec_desc,
614 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
615 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
616 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
617 ndr_errstr(ndr_err)));
618 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
619 return tevent_req_post(req, ev);
620 }
621 }
622
623 if (dhnq) {
624 if (dhnq->data.length != 16) {
625 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
626 return tevent_req_post(req, ev);
627 }
628
629 if (dh2q) {
630 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
631 return tevent_req_post(req, ev);
632 }
633
634 /*
635 * durable handle request is processed below.
636 */
637 durable_requested = true;
638 /*
639 * Set the timeout to 16 mins.
640 *
641 * TODO: test this against Windows 2012
642 * as the default for durable v2 is 1 min.
643 */
644 durable_timeout_msec = (16*60*1000);
645 }
646
647 if (dh2q) {
648 const uint8_t *p = dh2q->data.data;
649 uint32_t durable_v2_timeout = 0;
650 DATA_BLOB create_guid_blob;
651
652 if (dh2q->data.length != 32) {
653 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
654 return tevent_req_post(req, ev);
655 }
656
657 if (dhnq) {
658 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
659 return tevent_req_post(req, ev);
660 }
661
662 durable_v2_timeout = IVAL(p, 0);
663 create_guid_blob = data_blob_const(p + 16, 16);
664
665 status = GUID_from_ndr_blob(&create_guid_blob,
666 &create_guid);
667 if (tevent_req_nterror(req, status)) {
668 return tevent_req_post(req, ev);
669 }
670 /*
671 * we need to store the create_guid later
672 */
673 update_open = true;
674
675 /*
676 * durable handle v2 request processed below
677 */
678 durable_requested = true;
679 durable_timeout_msec = durable_v2_timeout;
680 if (durable_timeout_msec == 0) {
681 /*
682 * Set the timeout to 1 min as default.
683 *
684 * This matches Windows 2012.
685 */
686 durable_timeout_msec = (60*1000);
687 }
688 }
689
690 if (dhnc) {
691 NTTIME now = timeval_to_nttime(&smb2req->request_time);
692 uint64_t persistent_id;
693
694 persistent_id = BVAL(dhnc->data.data, 0);
695
696 status = smb2srv_open_recreate(smb2req->sconn->conn,
697 smb1req->conn->session_info,
698 persistent_id, create_guid,
699 now, &op);
700 if (!NT_STATUS_IS_OK(status)) {
701 DEBUG(3, ("smbd_smb2_create_send: "
702 "smb2srv_open_recreate v1 failed: %s\n",
703 nt_errstr(status)));
704 tevent_req_nterror(req, status);
705 return tevent_req_post(req, ev);
706 }
707
708 DEBUG(10, ("smb2_create_send: DHNC: %s recreate the "
709 "smb2srv_open struct for a durable handle.\n",
710 op->global->durable ? "did" : "could not"));
711
712 if (!op->global->durable) {
713 talloc_free(op);
714 tevent_req_nterror(req,
715 NT_STATUS_OBJECT_NAME_NOT_FOUND);
716 return tevent_req_post(req, ev);
717 }
718
719 do_durable_reconnect = true;
720 }
721
722 if (dh2c) {
723 const uint8_t *p = dh2c->data.data;
724 NTTIME now = timeval_to_nttime(&smb2req->request_time);
725 uint64_t persistent_id;
726 DATA_BLOB create_guid_blob;
727
728 persistent_id = BVAL(p, 0);
729 create_guid_blob = data_blob_const(p + 16, 16);
730
731 status = GUID_from_ndr_blob(&create_guid_blob,
732 &create_guid);
733 if (tevent_req_nterror(req, status)) {
734 return tevent_req_post(req, ev);
735 }
736
737 status = smb2srv_open_recreate(smb2req->sconn->conn,
738 smb1req->conn->session_info,
739 persistent_id, create_guid,
740 now, &op);
741 if (!NT_STATUS_IS_OK(status)) {
742 DEBUG(3, ("smbd_smb2_create_send: "
743 "smb2srv_open_recreate v2 failed: %s\n",
744 nt_errstr(status)));
745 tevent_req_nterror(req, status);
746 return tevent_req_post(req, ev);
747 }
748
749 DEBUG(10, ("smb2_create_send: DH2C: %s recreate the "
750 "smb2srv_open struct for a durable handle.\n",
751 op->global->durable ? "did" : "could not"));
752
753 if (!op->global->durable) {
754 talloc_free(op);
755 tevent_req_nterror(req,
756 NT_STATUS_OBJECT_NAME_NOT_FOUND);
757 return tevent_req_post(req, ev);
758 }
759
760 do_durable_reconnect = true;
761 }
762
763 if (alsi) {
764 if (alsi->data.length != 8) {
765 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
766 return tevent_req_post(req, ev);
767 }
768 allocation_size = BVAL(alsi->data.data, 0);
769 }
770
771 if (twrp) {
772 NTTIME nttime;
773 time_t t;
774 struct tm *tm;
775
776 if (twrp->data.length != 8) {
777 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
778 return tevent_req_post(req, ev);
779 }
780
781 nttime = BVAL(twrp->data.data, 0);
782 t = nt_time_to_unix(nttime);
783 tm = gmtime(&t);
784
785 TALLOC_FREE(fname);
786 fname = talloc_asprintf(state,
787 "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
788 tm->tm_year + 1900,
789 tm->tm_mon + 1,
790 tm->tm_mday,
791 tm->tm_hour,
792 tm->tm_min,
793 tm->tm_sec,
794 in_name);
795 if (tevent_req_nomem(fname, req)) {
796 return tevent_req_post(req, ev);
797 }
798 }
799
800 if (qfid) {
801 if (qfid->data.length != 0) {
802 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
803 return tevent_req_post(req, ev);
804 }
805 }
806
807 /* these are ignored for SMB2 */
808 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
809 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
810
811 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
812
813 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
814
815 /*
816 * For the backend file open procedure, there are
817 * two possible modes: durable_reconnect or not.
818 */
819 if (do_durable_reconnect) {
820 DATA_BLOB new_cookie = data_blob_null;
821
822 status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
823 smb1req,
824 op,
825 op->global->backend_cookie,
826 op, &result, &new_cookie);
827 if (!NT_STATUS_IS_OK(status)) {
828 NTSTATUS return_status;
829
830 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
831
832 DEBUG(3, ("smbd_smb2_create_send: "
833 "durable_reconnect failed: %s => %s\n",
834 nt_errstr(status),
835 nt_errstr(return_status)));
836
837 tevent_req_nterror(req, return_status);
838 return tevent_req_post(req, ev);
839 }
840
841 data_blob_free(&op->global->backend_cookie);
842 op->global->backend_cookie = new_cookie;
843
844 op->status = NT_STATUS_OK;
845 op->global->disconnect_time = 0;
846
847 /* save the timout for later update */
848 durable_timeout_msec = op->global->durable_timeout_msec;
849
850 update_open = true;
851
852 info = FILE_WAS_OPENED;
853 } else {
854 struct smb_filename *smb_fname = NULL;
855
856 /*
857 * For a DFS path the function parse_dfs_path()
858 * will do the path processing.
859 */
860
861 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
862 /* convert '\\' into '/' */
863 status = check_path_syntax(fname);
864 if (!NT_STATUS_IS_OK(status)) {
865 tevent_req_nterror(req, status);
866 return tevent_req_post(req, ev);
867 }
868 }
869
870 status = filename_convert(req,
871 smb1req->conn,
872 smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
873 fname,
874 0, /* unix_convert flags */
875 NULL, /* ppath_contains_wcards */
876 &smb_fname);
877 if (!NT_STATUS_IS_OK(status)) {
878 tevent_req_nterror(req, status);
879 return tevent_req_post(req, ev);
880 }
881
882 status = SMB_VFS_CREATE_FILE(smb1req->conn,
883 smb1req,
884 0, /* root_dir_fid */
885 smb_fname,
886 in_desired_access,
887 in_share_access,
888 in_create_disposition,
889 in_create_options,
890 in_file_attributes,
891 map_smb2_oplock_levels_to_samba(requested_oplock_level),
892 allocation_size,
893 0, /* private_flags */
894 sec_desc,
895 ea_list,
896 &result,
897 &info);
898 if (!NT_STATUS_IS_OK(status)) {
899 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
900 return req;
901 }
902 tevent_req_nterror(req, status);
903 return tevent_req_post(req, ev);
904 }
905 op = result->op;
906 }
907
908 /*
909 * here we have op == result->op
910 */
911
912 DEBUG(10, ("smbd_smb2_create_send: "
913 "response construction phase\n"));
914
915 if (mxac) {
916 NTTIME last_write_time;
917
918 unix_timespec_to_nt_time(&last_write_time,
919 result->fsp_name->st.st_ex_mtime);
920 if (last_write_time != max_access_time) {
921 uint8_t p[8];
922 uint32_t max_access_granted;
923 DATA_BLOB blob = data_blob_const(p, sizeof(p));
924
925 status = smbd_calculate_access_mask(smb1req->conn,
926 result->fsp_name,
927 SEC_FLAG_MAXIMUM_ALLOWED,
928 &max_access_granted);
929
930 SIVAL(p, 0, NT_STATUS_V(status));
931 SIVAL(p, 4, max_access_granted);
932
933 status = smb2_create_blob_add(state,
934 &out_context_blobs,
935 SMB2_CREATE_TAG_MXAC,
936 blob);
937 if (!NT_STATUS_IS_OK(status)) {
938 tevent_req_nterror(req, status);
939 return tevent_req_post(req, ev);
940 }
941 }
942 }
943
944 if (durable_requested &&
945 BATCH_OPLOCK_TYPE(result->oplock_type))
946 {
947 status = SMB_VFS_DURABLE_COOKIE(result,
948 op,
949 &op->global->backend_cookie);
950 if (!NT_STATUS_IS_OK(status)) {
951 op->global->backend_cookie = data_blob_null;
952 }
953 }
954 if (op->global->backend_cookie.length > 0) {
955 update_open = true;
956
957 op->global->durable = true;
958 op->global->durable_timeout_msec = durable_timeout_msec;
959 }
960
961 if (update_open) {
962 op->global->create_guid = create_guid;
963
964 status = smbXsrv_open_update(op);
965 DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
966 "returned %s\n",
967 nt_errstr(status)));
968 if (!NT_STATUS_IS_OK(status)) {
969 tevent_req_nterror(req, status);
970 return tevent_req_post(req, ev);
971 }
972 }
973
974 if (dhnq && op->global->durable) {
975 uint8_t p[8] = { 0, };
976 DATA_BLOB blob = data_blob_const(p, sizeof(p));
977
978 status = smb2_create_blob_add(state,
979 &out_context_blobs,
980 SMB2_CREATE_TAG_DHNQ,
981 blob);
982 if (!NT_STATUS_IS_OK(status)) {
983 tevent_req_nterror(req, status);
984 return tevent_req_post(req, ev);
985 }
986 }
987
988 if (dh2q && op->global->durable) {
989 uint8_t p[8] = { 0, };
990 DATA_BLOB blob = data_blob_const(p, sizeof(p));
991 uint32_t durable_v2_response_flags = 0;
992
993 SIVAL(p, 0, op->global->durable_timeout_msec);
994 SIVAL(p, 4, durable_v2_response_flags);
995
996 status = smb2_create_blob_add(state, &out_context_blobs,
997 SMB2_CREATE_TAG_DH2Q,
998 blob);
999 if (!NT_STATUS_IS_OK(status)) {
1000 tevent_req_nterror(req, status);
1001 return tevent_req_post(req, ev);
1002 }
1003 }
1004
1005 if (qfid) {
1006 uint8_t p[32];
1007 uint64_t file_index = get_FileIndex(result->conn,
1008 &result->fsp_name->st);
1009 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1010
1011 ZERO_STRUCT(p);
1012
1013 /* From conversations with Microsoft engineers at
1014 the MS plugfest. The first 8 bytes are the "volume index"
1015 == inode, the second 8 bytes are the "volume id",
1016 == dev. This will be updated in the SMB2 doc. */
1017 SBVAL(p, 0, file_index);
1018 SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1019
1020 status = smb2_create_blob_add(state, &out_context_blobs,
1021 SMB2_CREATE_TAG_QFID,
1022 blob);
1023 if (!NT_STATUS_IS_OK(status)) {
1024 tevent_req_nterror(req, status);
1025 return tevent_req_post(req, ev);
1026 }
1027 }
1028 }
1029
1030 smb2req->compat_chain_fsp = smb1req->chain_fsp;
1031
1032 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1033 state->out_oplock_level = in_oplock_level;
1034 } else {
1035 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1036 }
1037
1038 if ((in_create_disposition == FILE_SUPERSEDE)
1039 && (info == FILE_WAS_OVERWRITTEN)) {
1040 state->out_create_action = FILE_WAS_SUPERSEDED;
1041 } else {
1042 state->out_create_action = info;
1043 }
1044 state->out_file_attributes = dos_mode(result->conn,
1045 result->fsp_name);
1046 /* Deal with other possible opens having a modified
1047 write time. JRA. */
1048 ZERO_STRUCT(write_time_ts);
1049 get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1050 if (!null_timespec(write_time_ts)) {
1051 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1052 }
1053
1054 unix_timespec_to_nt_time(&state->out_creation_time,
1055 get_create_timespec(smb1req->conn, result,
1056 result->fsp_name));
1057 unix_timespec_to_nt_time(&state->out_last_access_time,
1058 result->fsp_name->st.st_ex_atime);
1059 unix_timespec_to_nt_time(&state->out_last_write_time,
1060 result->fsp_name->st.st_ex_mtime);
1061 unix_timespec_to_nt_time(&state->out_change_time,
1062 get_change_timespec(smb1req->conn, result,
1063 result->fsp_name));
1064 state->out_allocation_size =
1065 SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1066 &(result->fsp_name->st));
1067 state->out_end_of_file = result->fsp_name->st.st_ex_size;
1068 if (state->out_file_attributes == 0) {
1069 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1070 }
1071 state->out_file_id_persistent = result->op->global->open_persistent_id;
1072 state->out_file_id_volatile = result->op->global->open_volatile_id;
1073 state->out_context_blobs = out_context_blobs;
1074
1075 DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1076 fsp_str_dbg(result), fsp_fnum_dbg(result)));
1077
1078 tevent_req_done(req);
1079 return tevent_req_post(req, ev);
1080 }
1081
1082 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1083 TALLOC_CTX *mem_ctx,
1084 uint8_t *out_oplock_level,
1085 uint32_t *out_create_action,
1086 NTTIME *out_creation_time,
1087 NTTIME *out_last_access_time,
1088 NTTIME *out_last_write_time,
1089 NTTIME *out_change_time,
1090 uint64_t *out_allocation_size,
1091 uint64_t *out_end_of_file,
1092 uint32_t *out_file_attributes,
1093 uint64_t *out_file_id_persistent,
1094 uint64_t *out_file_id_volatile,
1095 struct smb2_create_blobs *out_context_blobs)
1096 {
1097 NTSTATUS status;
1098 struct smbd_smb2_create_state *state = tevent_req_data(req,
1099 struct smbd_smb2_create_state);
1100
1101 if (tevent_req_is_nterror(req, &status)) {
1102 tevent_req_received(req);
1103 return status;
1104 }
1105
1106 *out_oplock_level = state->out_oplock_level;
1107 *out_create_action = state->out_create_action;
1108 *out_creation_time = state->out_creation_time;
1109 *out_last_access_time = state->out_last_access_time;
1110 *out_last_write_time = state->out_last_write_time;
1111 *out_change_time = state->out_change_time;
1112 *out_allocation_size = state->out_allocation_size;
1113 *out_end_of_file = state->out_end_of_file;
1114 *out_file_attributes = state->out_file_attributes;
1115 *out_file_id_persistent = state->out_file_id_persistent;
1116 *out_file_id_volatile = state->out_file_id_volatile;
1117 *out_context_blobs = state->out_context_blobs;
1118
1119 talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1120
1121 tevent_req_received(req);
1122 return NT_STATUS_OK;
1123 }
1124
1125 /*********************************************************
1126 Code for dealing with deferred opens.
1127 *********************************************************/
1128
1129 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1130 struct timeval *p_request_time,
1131 void **pp_state)
1132 {
1133 struct smbd_smb2_create_state *state = NULL;
1134 struct tevent_req *req = NULL;
1135
1136 if (!smb2req) {
1137 return false;
1138 }
1139 req = smb2req->subreq;
1140 if (!req) {
1141 return false;
1142 }
1143 state = tevent_req_data(req, struct smbd_smb2_create_state);
1144 if (!state) {
1145 return false;
1146 }
1147 if (!state->open_was_deferred) {
1148 return false;
1149 }
1150 if (p_request_time) {
1151 *p_request_time = state->request_time;
1152 }
1153 if (pp_state) {
1154 *pp_state = (void *)state->private_data.data;
1155 }
1156 return true;
1157 }
1158
1159 /*********************************************************
1160 Re-process this call early - requested by message or
1161 close.
1162 *********************************************************/
1163
1164 static struct smbd_smb2_request *find_open_smb2req(
1165 struct smbd_server_connection *sconn, uint64_t mid)
1166 {
1167 struct smbd_smb2_request *smb2req;
1168
1169 for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1170 uint64_t message_id;
1171 if (smb2req->subreq == NULL) {
1172 /* This message has been processed. */
1173 continue;
1174 }
1175 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1176 /* This message has been processed. */
1177 continue;
1178 }
1179 message_id = get_mid_from_smb2req(smb2req);
1180 if (message_id == mid) {
1181 return smb2req;
1182 }
1183 }
1184 return NULL;
1185 }
1186
1187 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1188 {
1189 struct smbd_smb2_create_state *state = NULL;
1190 struct smbd_smb2_request *smb2req;
1191
1192 smb2req = find_open_smb2req(sconn, mid);
1193
1194 if (!smb2req) {
1195 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1196 (unsigned long long)mid));
1197 return false;
1198 }
1199 if (!smb2req->subreq) {
1200 return false;
1201 }
1202 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1203 return false;
1204 }
1205 state = tevent_req_data(smb2req->subreq,
1206 struct smbd_smb2_create_state);
1207 if (!state) {
1208 return false;
1209 }
1210 /* It's not in progress if there's no timeout event. */
1211 if (!state->open_was_deferred) {
1212 return false;
1213 }
1214
1215 DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1216 (unsigned long long)mid));
1217
1218 return true;
1219 }
1220
1221 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1222 uint64_t mid)
1223 {
1224 struct smbd_smb2_create_state *state = NULL;
1225
1226 if (!smb2req->subreq) {
1227 return;
1228 }
1229 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1230 return;
1231 }
1232 state = tevent_req_data(smb2req->subreq,
1233 struct smbd_smb2_create_state);
1234 if (!state) {
1235 return;
1236 }
1237
1238 DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1239 "mid %llu\n",
1240 (unsigned long long)mid ));
1241
1242 state->open_was_deferred = false;
1243 /* Ensure we don't have any outstanding timer event. */
1244 TALLOC_FREE(state->te);
1245 /* Ensure we don't have any outstanding immediate event. */
1246 TALLOC_FREE(state->im);
1247 }
1248
1249 void remove_deferred_open_message_smb2(
1250 struct smbd_server_connection *sconn, uint64_t mid)
1251 {
1252 struct smbd_smb2_request *smb2req;
1253
1254 smb2req = find_open_smb2req(sconn, mid);
1255
1256 if (!smb2req) {
1257 DEBUG(10,("remove_deferred_open_message_smb2: "
1258 "can't find mid %llu\n",
1259 (unsigned long long)mid ));
1260 return;
1261 }
1262 remove_deferred_open_message_smb2_internal(smb2req, mid);
1263 }
1264
1265 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1266 struct tevent_immediate *im,
1267 void *private_data)
1268 {
1269 struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1270 struct smbd_smb2_request);
1271 struct smbd_server_connection *sconn = smb2req->sconn;
1272 uint64_t mid = get_mid_from_smb2req(smb2req);
1273 NTSTATUS status;
1274
1275 DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1276 "re-dispatching mid %llu\n",
1277 (unsigned long long)mid ));
1278
1279 status = smbd_smb2_request_dispatch(smb2req);
1280 if (!NT_STATUS_IS_OK(status)) {
1281 smbd_server_connection_terminate(sconn, nt_errstr(status));
1282 return;
1283 }
1284 }
1285
1286 bool schedule_deferred_open_message_smb2(
1287 struct smbd_server_connection *sconn, uint64_t mid)
1288 {
1289 struct smbd_smb2_create_state *state = NULL;
1290 struct smbd_smb2_request *smb2req;
1291
1292 smb2req = find_open_smb2req(sconn, mid);
1293
1294 if (!smb2req) {
1295 DEBUG(10,("schedule_deferred_open_message_smb2: "
1296 "can't find mid %llu\n",
1297 (unsigned long long)mid ));
1298 return false;
1299 }
1300 if (!smb2req->subreq) {
1301 return false;
1302 }
1303 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1304 return false;
1305 }
1306 state = tevent_req_data(smb2req->subreq,
1307 struct smbd_smb2_create_state);
1308 if (!state) {
1309 return false;
1310 }
1311
1312 /* Ensure we don't have any outstanding timer event. */
1313 TALLOC_FREE(state->te);
1314 /* Ensure we don't have any outstanding immediate event. */
1315 TALLOC_FREE(state->im);
1316
1317 /*
1318 * This is subtle. We must null out the callback
1319 * before rescheduling, else the first call to
1320 * tevent_req_nterror() causes the _receive()
1321 * function to be called, this causing tevent_req_post()
1322 * to crash.
1323 */
1324 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1325
1326 state->im = tevent_create_immediate(smb2req);
1327 if (!state->im) {
1328 smbd_server_connection_terminate(smb2req->sconn,
1329 nt_errstr(NT_STATUS_NO_MEMORY));
1330 return false;
1331 }
1332
1333 DEBUG(10,("schedule_deferred_open_message_smb2: "
1334 "re-processing mid %llu\n",
1335 (unsigned long long)mid ));
1336
1337 tevent_schedule_immediate(state->im,
1338 smb2req->sconn->ev_ctx,
1339 smbd_smb2_create_request_dispatch_immediate,
1340 smb2req);
1341
1342 return true;
1343 }
1344
1345 /*********************************************************
1346 Re-process this call.
1347 *********************************************************/
1348
1349 static void smb2_deferred_open_timer(struct event_context *ev,
1350 struct timed_event *te,
1351 struct timeval _tval,
1352 void *private_data)
1353 {
1354 NTSTATUS status;
1355 struct smbd_smb2_create_state *state = NULL;
1356 struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1357 struct smbd_smb2_request);
1358
1359 DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1360 smb2req->current_idx,
1361 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1362
1363 state = tevent_req_data(smb2req->subreq,
1364 struct smbd_smb2_create_state);
1365 if (!state) {
1366 return;
1367 }
1368 /*
1369 * Null this out, don't talloc_free. It will
1370 * be talloc_free'd by the tevent library when
1371 * this returns.
1372 */
1373 state->te = NULL;
1374 /* Ensure we don't have any outstanding immediate event. */
1375 TALLOC_FREE(state->im);
1376
1377 /*
1378 * This is subtle. We must null out the callback
1379 * before rescheduling, else the first call to
1380 * tevent_req_nterror() causes the _receive()
1381 * function to be called, this causing tevent_req_post()
1382 * to crash.
1383 */
1384 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1385
1386 status = smbd_smb2_request_dispatch(smb2req);
1387
1388 if (!NT_STATUS_IS_OK(status)) {
1389 smbd_server_connection_terminate(smb2req->sconn,
1390 nt_errstr(status));
1391 }
1392 }
1393
1394 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1395 {
1396 struct smbd_smb2_request *smb2req = NULL;
1397 struct smbd_smb2_create_state *state = tevent_req_data(req,
1398 struct smbd_smb2_create_state);
1399 uint64_t mid;
1400
1401 if (!state) {
1402 return false;
1403 }
1404
1405 if (!state->smb2req) {
1406 return false;
1407 }
1408
1409 smb2req = state->smb2req;
1410 mid = get_mid_from_smb2req(smb2req);
1411
1412 if (is_deferred_open_async(state->private_data.data)) {
1413 /* Can't cancel an async create. */
1414 return false;
1415 }
1416
1417 remove_deferred_open_entry(state->id, mid,
1418 messaging_server_id(smb2req->sconn->msg_ctx));
1419 remove_deferred_open_message_smb2_internal(smb2req, mid);
1420
1421 tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1422 tevent_req_nterror(req, NT_STATUS_CANCELLED);
1423 return true;
1424 }
1425
1426 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1427 struct timeval request_time,
1428 struct timeval timeout,
1429 struct file_id id,
1430 char *private_data,
1431 size_t priv_len)
1432 {
1433 struct tevent_req *req = NULL;
1434 struct smbd_smb2_create_state *state = NULL;
1435 struct timeval end_time;
1436
1437 if (!smb2req) {
1438 return false;
1439 }
1440 req = smb2req->subreq;
1441 if (!req) {
1442 return false;
1443 }
1444 state = tevent_req_data(req, struct smbd_smb2_create_state);
1445 if (!state) {
1446 return false;
1447 }
1448 state->id = id;
1449 state->request_time = request_time;
1450 state->private_data = data_blob_talloc(state, private_data,
1451 priv_len);
1452 if (!state->private_data.data) {
1453 return false;
1454 }
1455
1456 /* Re-schedule us to retry on timer expiry. */
1457 end_time = timeval_sum(&request_time, &timeout);
1458
1459 DEBUG(10,("push_deferred_open_message_smb2: "
1460 "timeout at %s\n",
1461 timeval_string(talloc_tos(),
1462 &end_time,
1463 true) ));
1464
1465 state->open_was_deferred = true;
1466 state->te = tevent_add_timer(smb2req->sconn->ev_ctx,
1467 state,
1468 end_time,
1469 smb2_deferred_open_timer,
1470 smb2req);
1471 if (!state->te) {
1472 return false;
1473 }
1474
1475 /* allow this request to be canceled */
1476 tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1477
1478 return true;
1479 }
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