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libcli/security: remove unused sec_desc_del_sid()
[Samba/wip.git] / source3 / smbd / smb2_create.c
blob4e82e2c553ac924f12674cabf999b4dbbdbb7fb1
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 return SMB2_OPLOCK_LEVEL_II;
62 } else {
63 return SMB2_OPLOCK_LEVEL_NONE;
64 }
65 }
66
67 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
68 struct tevent_context *ev,
69 struct smbd_smb2_request *smb2req,
70 uint8_t in_oplock_level,
71 uint32_t in_impersonation_level,
72 uint32_t in_desired_access,
73 uint32_t in_file_attributes,
74 uint32_t in_share_access,
75 uint32_t in_create_disposition,
76 uint32_t in_create_options,
77 const char *in_name,
78 struct smb2_create_blobs in_context_blobs);
79 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
80 TALLOC_CTX *mem_ctx,
81 uint8_t *out_oplock_level,
82 uint32_t *out_create_action,
83 struct timespec *out_creation_ts,
84 struct timespec *out_last_access_ts,
85 struct timespec *out_last_write_ts,
86 struct timespec *out_change_ts,
87 uint64_t *out_allocation_size,
88 uint64_t *out_end_of_file,
89 uint32_t *out_file_attributes,
90 uint64_t *out_file_id_persistent,
91 uint64_t *out_file_id_volatile,
92 struct smb2_create_blobs *out_context_blobs);
93
94 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
95 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
96 {
97 const uint8_t *inbody;
98 const struct iovec *indyniov;
99 uint8_t in_oplock_level;
100 uint32_t in_impersonation_level;
101 uint32_t in_desired_access;
102 uint32_t in_file_attributes;
103 uint32_t in_share_access;
104 uint32_t in_create_disposition;
105 uint32_t in_create_options;
106 uint16_t in_name_offset;
107 uint16_t in_name_length;
108 DATA_BLOB in_name_buffer;
109 char *in_name_string;
110 size_t in_name_string_size;
111 uint32_t name_offset = 0;
112 uint32_t name_available_length = 0;
113 uint32_t in_context_offset;
114 uint32_t in_context_length;
115 DATA_BLOB in_context_buffer;
116 struct smb2_create_blobs in_context_blobs;
117 uint32_t context_offset = 0;
118 uint32_t context_available_length = 0;
119 uint32_t dyn_offset;
120 NTSTATUS status;
121 bool ok;
122 struct tevent_req *tsubreq;
123
124 status = smbd_smb2_request_verify_sizes(smb2req, 0x39);
125 if (!NT_STATUS_IS_OK(status)) {
126 return smbd_smb2_request_error(smb2req, status);
127 }
128 inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
129
130 in_oplock_level = CVAL(inbody, 0x03);
131 in_impersonation_level = IVAL(inbody, 0x04);
132 in_desired_access = IVAL(inbody, 0x18);
133 in_file_attributes = IVAL(inbody, 0x1C);
134 in_share_access = IVAL(inbody, 0x20);
135 in_create_disposition = IVAL(inbody, 0x24);
136 in_create_options = IVAL(inbody, 0x28);
137 in_name_offset = SVAL(inbody, 0x2C);
138 in_name_length = SVAL(inbody, 0x2E);
139 in_context_offset = IVAL(inbody, 0x30);
140 in_context_length = IVAL(inbody, 0x34);
141
142 /*
143 * First check if the dynamic name and context buffers
144 * are correctly specified.
145 *
146 * Note: That we don't check if the name and context buffers
147 * overlap
148 */
149
150 dyn_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req);
151
152 if (in_name_offset == 0 && in_name_length == 0) {
153 /* This is ok */
154 name_offset = 0;
155 } else if (in_name_offset < dyn_offset) {
156 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
157 } else {
158 name_offset = in_name_offset - dyn_offset;
159 }
160
161 indyniov = SMBD_SMB2_IN_DYN_IOV(smb2req);
162
163 if (name_offset > indyniov->iov_len) {
164 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
165 }
166
167 name_available_length = indyniov->iov_len - name_offset;
168
169 if (in_name_length > name_available_length) {
170 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
171 }
172
173 in_name_buffer.data = (uint8_t *)indyniov->iov_base + name_offset;
174 in_name_buffer.length = in_name_length;
175
176 if (in_context_offset == 0 && in_context_length == 0) {
177 /* This is ok */
178 context_offset = 0;
179 } else if (in_context_offset < dyn_offset) {
180 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
181 } else {
182 context_offset = in_context_offset - dyn_offset;
183 }
184
185 if (context_offset > indyniov->iov_len) {
186 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
187 }
188
189 context_available_length = indyniov->iov_len - context_offset;
190
191 if (in_context_length > context_available_length) {
192 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
193 }
194
195 in_context_buffer.data = (uint8_t *)indyniov->iov_base +
196 context_offset;
197 in_context_buffer.length = in_context_length;
198
199 /*
200 * Now interpret the name and context buffers
201 */
202
203 ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
204 in_name_buffer.data,
205 in_name_buffer.length,
206 &in_name_string,
207 &in_name_string_size);
208 if (!ok) {
209 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
210 }
211
212 if (in_name_buffer.length == 0) {
213 in_name_string_size = 0;
214 }
215
216 if (strlen(in_name_string) != in_name_string_size) {
217 return smbd_smb2_request_error(smb2req, NT_STATUS_OBJECT_NAME_INVALID);
218 }
219
220 ZERO_STRUCT(in_context_blobs);
221 status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
222 if (!NT_STATUS_IS_OK(status)) {
223 return smbd_smb2_request_error(smb2req, status);
224 }
225
226 tsubreq = smbd_smb2_create_send(smb2req,
227 smb2req->sconn->ev_ctx,
228 smb2req,
229 in_oplock_level,
230 in_impersonation_level,
231 in_desired_access,
232 in_file_attributes,
233 in_share_access,
234 in_create_disposition,
235 in_create_options,
236 in_name_string,
237 in_context_blobs);
238 if (tsubreq == NULL) {
239 smb2req->subreq = NULL;
240 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
241 }
242 tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
243
244 /*
245 * For now we keep the logic that we do not send STATUS_PENDING
246 * for sharing violations, so we just wait 2 seconds.
247 *
248 * TODO: we need more tests for this.
249 */
250 return smbd_smb2_request_pending_queue(smb2req, tsubreq, 2000000);
251 }
252
253 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
254 {
255 uint8_t *reqhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
256 return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
257 }
258
259 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
260 {
261 struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
262 struct smbd_smb2_request);
263 DATA_BLOB outbody;
264 DATA_BLOB outdyn;
265 uint8_t out_oplock_level = 0;
266 uint32_t out_create_action = 0;
267 connection_struct *conn = smb2req->tcon->compat;
268 struct timespec out_creation_ts = { 0, };
269 struct timespec out_last_access_ts = { 0, };
270 struct timespec out_last_write_ts = { 0, };
271 struct timespec out_change_ts = { 0, };
272 uint64_t out_allocation_size = 0;
273 uint64_t out_end_of_file = 0;
274 uint32_t out_file_attributes = 0;
275 uint64_t out_file_id_persistent = 0;
276 uint64_t out_file_id_volatile = 0;
277 struct smb2_create_blobs out_context_blobs;
278 DATA_BLOB out_context_buffer;
279 uint16_t out_context_buffer_offset = 0;
280 NTSTATUS status;
281 NTSTATUS error; /* transport error */
282
283 status = smbd_smb2_create_recv(tsubreq,
284 smb2req,
285 &out_oplock_level,
286 &out_create_action,
287 &out_creation_ts,
288 &out_last_access_ts,
289 &out_last_write_ts,
290 &out_change_ts,
291 &out_allocation_size,
292 &out_end_of_file,
293 &out_file_attributes,
294 &out_file_id_persistent,
295 &out_file_id_volatile,
296 &out_context_blobs);
297 if (!NT_STATUS_IS_OK(status)) {
298 error = smbd_smb2_request_error(smb2req, status);
299 if (!NT_STATUS_IS_OK(error)) {
300 smbd_server_connection_terminate(smb2req->sconn,
301 nt_errstr(error));
302 return;
303 }
304 return;
305 }
306
307 status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
308 if (!NT_STATUS_IS_OK(status)) {
309 error = smbd_smb2_request_error(smb2req, status);
310 if (!NT_STATUS_IS_OK(error)) {
311 smbd_server_connection_terminate(smb2req->sconn,
312 nt_errstr(error));
313 return;
314 }
315 return;
316 }
317
318 if (out_context_buffer.length > 0) {
319 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
320 }
321
322 outbody = smbd_smb2_generate_outbody(smb2req, 0x58);
323 if (outbody.data == NULL) {
324 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
325 if (!NT_STATUS_IS_OK(error)) {
326 smbd_server_connection_terminate(smb2req->sconn,
327 nt_errstr(error));
328 return;
329 }
330 return;
331 }
332
333 SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */
334 SCVAL(outbody.data, 0x02,
335 out_oplock_level); /* oplock level */
336 SCVAL(outbody.data, 0x03, 0); /* reserved */
337 SIVAL(outbody.data, 0x04,
338 out_create_action); /* create action */
339 put_long_date_timespec(conn->ts_res,
340 (char *)outbody.data + 0x08,
341 out_creation_ts); /* creation time */
342 put_long_date_timespec(conn->ts_res,
343 (char *)outbody.data + 0x10,
344 out_last_access_ts); /* last access time */
345 put_long_date_timespec(conn->ts_res,
346 (char *)outbody.data + 0x18,
347 out_last_write_ts); /* last write time */
348 put_long_date_timespec(conn->ts_res,
349 (char *)outbody.data + 0x20,
350 out_change_ts); /* 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 tevent_timer *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 struct timespec out_creation_ts;
389 struct timespec out_last_access_ts;
390 struct timespec out_last_write_ts;
391 struct timespec out_change_ts;
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 smb2_create_blobs out_context_blobs;
420 int requested_oplock_level;
421 struct smb2_create_blob *dhnc = NULL;
422 struct smb2_create_blob *dh2c = NULL;
423 struct smb2_create_blob *dhnq = NULL;
424 struct smb2_create_blob *dh2q = NULL;
425 struct smbXsrv_open *op = NULL;
426
427 ZERO_STRUCT(out_context_blobs);
428
429 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
430 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
431 } else {
432 requested_oplock_level = in_oplock_level;
433 }
434
435
436 if (smb2req->subreq == NULL) {
437 /* New create call. */
438 req = tevent_req_create(mem_ctx, &state,
439 struct smbd_smb2_create_state);
440 if (req == NULL) {
441 return NULL;
442 }
443 state->smb2req = smb2req;
444
445 smb1req = smbd_smb2_fake_smb_request(smb2req);
446 if (tevent_req_nomem(smb1req, req)) {
447 return tevent_req_post(req, ev);
448 }
449 state->smb1req = smb1req;
450 smb2req->subreq = req;
451 DEBUG(10,("smbd_smb2_create: name[%s]\n",
452 in_name));
453 } else {
454 /* Re-entrant create call. */
455 req = smb2req->subreq;
456 state = tevent_req_data(req,
457 struct smbd_smb2_create_state);
458 smb1req = state->smb1req;
459 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
460 in_name ));
461 }
462
463 dhnq = smb2_create_blob_find(&in_context_blobs,
464 SMB2_CREATE_TAG_DHNQ);
465 dhnc = smb2_create_blob_find(&in_context_blobs,
466 SMB2_CREATE_TAG_DHNC);
467 dh2q = smb2_create_blob_find(&in_context_blobs,
468 SMB2_CREATE_TAG_DH2Q);
469 dh2c = smb2_create_blob_find(&in_context_blobs,
470 SMB2_CREATE_TAG_DH2C);
471
472 if ((dhnc && dh2c) || (dhnc && dh2q) || (dh2c && dhnq) ||
473 (dh2q && dh2c))
474 {
475 /* not both are allowed at the same time */
476 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
477 return tevent_req_post(req, ev);
478 }
479
480 if (dhnc) {
481 uint32_t num_blobs_allowed;
482
483 if (dhnc->data.length != 16) {
484 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
485 return tevent_req_post(req, ev);
486 }
487
488 /*
489 * According to MS-SMB2: 3.3.5.9.7, "Handling the
490 * SMB2_CREATE_DURABLE_HANDLE_RECONNECT Create Context",
491 * we should ignore an additional dhnq blob, but fail
492 * the request (with status OBJECT_NAME_NOT_FOUND) if
493 * any other extra create blob has been provided.
494 *
495 * (Note that the cases of an additional dh2q or dh2c blob
496 * which require a different error code, have been treated
497 * above.)
498 *
499 * TODO:
500 * This is only true for the oplock case:
501 * For leases, lease request is required additionally.
502 */
503
504 if (dhnq) {
505 num_blobs_allowed = 2;
506 } else {
507 num_blobs_allowed = 1;
508 }
509
510 if (in_context_blobs.num_blobs != num_blobs_allowed) {
511 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
512 return tevent_req_post(req, ev);
513 }
514 }
515
516 if (dh2c) {
517 uint32_t num_blobs_allowed;
518
519 if (dh2c->data.length != 36) {
520 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
521 return tevent_req_post(req, ev);
522 }
523
524 /*
525 * According to MS-SMB2: 3.3.5.9.12, "Handling the
526 * SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 Create Context",
527 * we should fail the request with status
528 * OBJECT_NAME_NOT_FOUND if any other create blob has been
529 * provided.
530 *
531 * (Note that the cases of an additional dhnq, dhnc or dh2q
532 * blob which require a different error code, have been
533 * treated above.)
534 *
535 * TODO:
536 * This is only true for the oplock case:
537 * For leases, lease request is required additionally!
538 */
539
540 num_blobs_allowed = 1;
541
542 if (in_context_blobs.num_blobs != num_blobs_allowed) {
543 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
544 return tevent_req_post(req, ev);
545 }
546 }
547
548 if (IS_IPC(smb1req->conn)) {
549 const char *pipe_name = in_name;
550
551 if (dhnc || dh2c) {
552 /* durable handles are not supported on IPC$ */
553 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
554 return tevent_req_post(req, ev);
555 }
556
557 if (!lp_nt_pipe_support()) {
558 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
559 return tevent_req_post(req, ev);
560 }
561
562 status = open_np_file(smb1req, pipe_name, &result);
563 if (!NT_STATUS_IS_OK(status)) {
564 tevent_req_nterror(req, status);
565 return tevent_req_post(req, ev);
566 }
567 info = FILE_WAS_OPENED;
568 } else if (CAN_PRINT(smb1req->conn)) {
569 if (dhnc || dh2c) {
570 /* durable handles are not supported on printers */
571 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
572 return tevent_req_post(req, ev);
573 }
574
575 status = file_new(smb1req, smb1req->conn, &result);
576 if(!NT_STATUS_IS_OK(status)) {
577 tevent_req_nterror(req, status);
578 return tevent_req_post(req, ev);
579 }
580
581 status = print_spool_open(result, in_name,
582 smb1req->vuid);
583 if (!NT_STATUS_IS_OK(status)) {
584 file_free(smb1req, result);
585 tevent_req_nterror(req, status);
586 return tevent_req_post(req, ev);
587 }
588 info = FILE_WAS_CREATED;
589 } else {
590 char *fname;
591 struct smb2_create_blob *exta = NULL;
592 struct ea_list *ea_list = NULL;
593 struct smb2_create_blob *mxac = NULL;
594 NTTIME max_access_time = 0;
595 struct smb2_create_blob *secd = NULL;
596 struct security_descriptor *sec_desc = NULL;
597 struct smb2_create_blob *alsi = NULL;
598 uint64_t allocation_size = 0;
599 struct smb2_create_blob *twrp = NULL;
600 struct smb2_create_blob *qfid = NULL;
601 struct GUID _create_guid = GUID_zero();
602 struct GUID *create_guid = NULL;
603 bool update_open = false;
604 bool durable_requested = false;
605 uint32_t durable_timeout_msec = 0;
606 bool do_durable_reconnect = false;
607 uint64_t persistent_id = 0;
608
609 exta = smb2_create_blob_find(&in_context_blobs,
610 SMB2_CREATE_TAG_EXTA);
611 mxac = smb2_create_blob_find(&in_context_blobs,
612 SMB2_CREATE_TAG_MXAC);
613 secd = smb2_create_blob_find(&in_context_blobs,
614 SMB2_CREATE_TAG_SECD);
615 alsi = smb2_create_blob_find(&in_context_blobs,
616 SMB2_CREATE_TAG_ALSI);
617 twrp = smb2_create_blob_find(&in_context_blobs,
618 SMB2_CREATE_TAG_TWRP);
619 qfid = smb2_create_blob_find(&in_context_blobs,
620 SMB2_CREATE_TAG_QFID);
621
622 fname = talloc_strdup(state, in_name);
623 if (tevent_req_nomem(fname, req)) {
624 return tevent_req_post(req, ev);
625 }
626
627 if (exta) {
628 ea_list = read_nttrans_ea_list(mem_ctx,
629 (const char *)exta->data.data, exta->data.length);
630 if (!ea_list) {
631 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
632 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
633 return tevent_req_post(req, ev);
634 }
635
636 if (ea_list_has_invalid_name(ea_list)) {
637 tevent_req_nterror(req, STATUS_INVALID_EA_NAME);
638 return tevent_req_post(req, ev);
639 }
640 }
641
642 if (mxac) {
643 if (mxac->data.length == 0) {
644 max_access_time = 0;
645 } else if (mxac->data.length == 8) {
646 max_access_time = BVAL(mxac->data.data, 0);
647 } else {
648 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
649 return tevent_req_post(req, ev);
650 }
651 }
652
653 if (secd) {
654 enum ndr_err_code ndr_err;
655
656 sec_desc = talloc_zero(state, struct security_descriptor);
657 if (tevent_req_nomem(sec_desc, req)) {
658 return tevent_req_post(req, ev);
659 }
660
661 ndr_err = ndr_pull_struct_blob(&secd->data,
662 sec_desc, sec_desc,
663 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
664 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
665 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
666 ndr_errstr(ndr_err)));
667 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
668 return tevent_req_post(req, ev);
669 }
670 }
671
672 if (dhnq) {
673 if (dhnq->data.length != 16) {
674 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
675 return tevent_req_post(req, ev);
676 }
677
678 if (dh2q) {
679 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
680 return tevent_req_post(req, ev);
681 }
682
683 /*
684 * durable handle request is processed below.
685 */
686 durable_requested = true;
687 /*
688 * Set the timeout to 16 mins.
689 *
690 * TODO: test this against Windows 2012
691 * as the default for durable v2 is 1 min.
692 */
693 durable_timeout_msec = (16*60*1000);
694 }
695
696 if (dh2q) {
697 const uint8_t *p = dh2q->data.data;
698 uint32_t durable_v2_timeout = 0;
699 DATA_BLOB create_guid_blob;
700
701 if (dh2q->data.length != 32) {
702 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
703 return tevent_req_post(req, ev);
704 }
705
706 if (dhnq) {
707 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
708 return tevent_req_post(req, ev);
709 }
710
711 durable_v2_timeout = IVAL(p, 0);
712 create_guid_blob = data_blob_const(p + 16, 16);
713
714 status = GUID_from_ndr_blob(&create_guid_blob,
715 &_create_guid);
716 if (tevent_req_nterror(req, status)) {
717 return tevent_req_post(req, ev);
718 }
719 create_guid = &_create_guid;
720 /*
721 * we need to store the create_guid later
722 */
723 update_open = true;
724
725 /*
726 * durable handle v2 request processed below
727 */
728 durable_requested = true;
729 durable_timeout_msec = durable_v2_timeout;
730 if (durable_timeout_msec == 0) {
731 /*
732 * Set the timeout to 1 min as default.
733 *
734 * This matches Windows 2012.
735 */
736 durable_timeout_msec = (60*1000);
737 }
738 }
739
740 if (dhnc) {
741 persistent_id = BVAL(dhnc->data.data, 0);
742
743 do_durable_reconnect = true;
744 }
745
746 if (dh2c) {
747 const uint8_t *p = dh2c->data.data;
748 DATA_BLOB create_guid_blob;
749
750 persistent_id = BVAL(p, 0);
751 create_guid_blob = data_blob_const(p + 16, 16);
752
753 status = GUID_from_ndr_blob(&create_guid_blob,
754 &_create_guid);
755 if (tevent_req_nterror(req, status)) {
756 return tevent_req_post(req, ev);
757 }
758 create_guid = &_create_guid;
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 NTTIME now = timeval_to_nttime(&smb2req->request_time);
822
823 status = smb2srv_open_recreate(smb2req->sconn->conn,
824 smb1req->conn->session_info,
825 persistent_id, create_guid,
826 now, &op);
827 if (!NT_STATUS_IS_OK(status)) {
828 DEBUG(3, ("smbd_smb2_create_send: "
829 "smb2srv_open_recreate failed: %s\n",
830 nt_errstr(status)));
831 tevent_req_nterror(req, status);
832 return tevent_req_post(req, ev);
833 }
834
835 DEBUG(10, ("smb2_create_send: %s to recreate the "
836 "smb2srv_open struct for a durable handle.\n",
837 op->global->durable ? "succeded" : "failed"));
838
839 if (!op->global->durable) {
840 talloc_free(op);
841 tevent_req_nterror(req,
842 NT_STATUS_OBJECT_NAME_NOT_FOUND);
843 return tevent_req_post(req, ev);
844 }
845
846 status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
847 smb1req,
848 op, /* smbXsrv_open input */
849 op->global->backend_cookie,
850 op, /* TALLOC_CTX */
851 &result, &new_cookie);
852 if (!NT_STATUS_IS_OK(status)) {
853 NTSTATUS return_status;
854
855 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
856
857 DEBUG(3, ("smbd_smb2_create_send: "
858 "durable_reconnect failed: %s => %s\n",
859 nt_errstr(status),
860 nt_errstr(return_status)));
861
862 tevent_req_nterror(req, return_status);
863 return tevent_req_post(req, ev);
864 }
865
866 data_blob_free(&op->global->backend_cookie);
867 op->global->backend_cookie = new_cookie;
868
869 op->status = NT_STATUS_OK;
870 op->global->disconnect_time = 0;
871
872 /* save the timout for later update */
873 durable_timeout_msec = op->global->durable_timeout_msec;
874
875 update_open = true;
876
877 info = FILE_WAS_OPENED;
878 } else {
879 struct smb_filename *smb_fname = NULL;
880
881 /*
882 * For a DFS path the function parse_dfs_path()
883 * will do the path processing.
884 */
885
886 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
887 /* convert '\\' into '/' */
888 status = check_path_syntax(fname);
889 if (!NT_STATUS_IS_OK(status)) {
890 tevent_req_nterror(req, status);
891 return tevent_req_post(req, ev);
892 }
893 }
894
895 status = filename_convert(req,
896 smb1req->conn,
897 smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
898 fname,
899 UCF_PREP_CREATEFILE,
900 NULL, /* ppath_contains_wcards */
901 &smb_fname);
902 if (!NT_STATUS_IS_OK(status)) {
903 tevent_req_nterror(req, status);
904 return tevent_req_post(req, ev);
905 }
906
907 status = SMB_VFS_CREATE_FILE(smb1req->conn,
908 smb1req,
909 0, /* root_dir_fid */
910 smb_fname,
911 in_desired_access,
912 in_share_access,
913 in_create_disposition,
914 in_create_options,
915 in_file_attributes,
916 map_smb2_oplock_levels_to_samba(requested_oplock_level),
917 allocation_size,
918 0, /* private_flags */
919 sec_desc,
920 ea_list,
921 &result,
922 &info);
923 if (!NT_STATUS_IS_OK(status)) {
924 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
925 return req;
926 }
927 tevent_req_nterror(req, status);
928 return tevent_req_post(req, ev);
929 }
930 op = result->op;
931 }
932
933 /*
934 * here we have op == result->op
935 */
936
937 DEBUG(10, ("smbd_smb2_create_send: "
938 "response construction phase\n"));
939
940 if (mxac) {
941 NTTIME last_write_time;
942
943 unix_timespec_to_nt_time(&last_write_time,
944 result->fsp_name->st.st_ex_mtime);
945 if (last_write_time != max_access_time) {
946 uint8_t p[8];
947 uint32_t max_access_granted;
948 DATA_BLOB blob = data_blob_const(p, sizeof(p));
949
950 status = smbd_calculate_access_mask(smb1req->conn,
951 result->fsp_name,
952 false,
953 SEC_FLAG_MAXIMUM_ALLOWED,
954 &max_access_granted);
955
956 SIVAL(p, 0, NT_STATUS_V(status));
957 SIVAL(p, 4, max_access_granted);
958
959 status = smb2_create_blob_add(state,
960 &out_context_blobs,
961 SMB2_CREATE_TAG_MXAC,
962 blob);
963 if (!NT_STATUS_IS_OK(status)) {
964 tevent_req_nterror(req, status);
965 return tevent_req_post(req, ev);
966 }
967 }
968 }
969
970 if (durable_requested &&
971 BATCH_OPLOCK_TYPE(result->oplock_type))
972 {
973 status = SMB_VFS_DURABLE_COOKIE(result,
974 op,
975 &op->global->backend_cookie);
976 if (!NT_STATUS_IS_OK(status)) {
977 op->global->backend_cookie = data_blob_null;
978 }
979 }
980 if (op->global->backend_cookie.length > 0) {
981 update_open = true;
982
983 op->global->durable = true;
984 op->global->durable_timeout_msec = durable_timeout_msec;
985 }
986
987 if (update_open) {
988 op->global->create_guid = _create_guid;
989
990 status = smbXsrv_open_update(op);
991 DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
992 "returned %s\n",
993 nt_errstr(status)));
994 if (!NT_STATUS_IS_OK(status)) {
995 tevent_req_nterror(req, status);
996 return tevent_req_post(req, ev);
997 }
998 }
999
1000 if (dhnq && op->global->durable) {
1001 uint8_t p[8] = { 0, };
1002 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1003
1004 status = smb2_create_blob_add(state,
1005 &out_context_blobs,
1006 SMB2_CREATE_TAG_DHNQ,
1007 blob);
1008 if (!NT_STATUS_IS_OK(status)) {
1009 tevent_req_nterror(req, status);
1010 return tevent_req_post(req, ev);
1011 }
1012 }
1013
1014 if (dh2q && op->global->durable) {
1015 uint8_t p[8] = { 0, };
1016 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1017 uint32_t durable_v2_response_flags = 0;
1018
1019 SIVAL(p, 0, op->global->durable_timeout_msec);
1020 SIVAL(p, 4, durable_v2_response_flags);
1021
1022 status = smb2_create_blob_add(state, &out_context_blobs,
1023 SMB2_CREATE_TAG_DH2Q,
1024 blob);
1025 if (!NT_STATUS_IS_OK(status)) {
1026 tevent_req_nterror(req, status);
1027 return tevent_req_post(req, ev);
1028 }
1029 }
1030
1031 if (qfid) {
1032 uint8_t p[32];
1033 uint64_t file_index = get_FileIndex(result->conn,
1034 &result->fsp_name->st);
1035 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1036
1037 ZERO_STRUCT(p);
1038
1039 /* From conversations with Microsoft engineers at
1040 the MS plugfest. The first 8 bytes are the "volume index"
1041 == inode, the second 8 bytes are the "volume id",
1042 == dev. This will be updated in the SMB2 doc. */
1043 SBVAL(p, 0, file_index);
1044 SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1045
1046 status = smb2_create_blob_add(state, &out_context_blobs,
1047 SMB2_CREATE_TAG_QFID,
1048 blob);
1049 if (!NT_STATUS_IS_OK(status)) {
1050 tevent_req_nterror(req, status);
1051 return tevent_req_post(req, ev);
1052 }
1053 }
1054 }
1055
1056 smb2req->compat_chain_fsp = smb1req->chain_fsp;
1057
1058 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1059 state->out_oplock_level = in_oplock_level;
1060 } else {
1061 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1062 }
1063
1064 if ((in_create_disposition == FILE_SUPERSEDE)
1065 && (info == FILE_WAS_OVERWRITTEN)) {
1066 state->out_create_action = FILE_WAS_SUPERSEDED;
1067 } else {
1068 state->out_create_action = info;
1069 }
1070 state->out_file_attributes = dos_mode(result->conn,
1071 result->fsp_name);
1072
1073 state->out_creation_ts = get_create_timespec(smb1req->conn,
1074 result, result->fsp_name);
1075 state->out_last_access_ts = result->fsp_name->st.st_ex_atime;
1076 state->out_last_write_ts = result->fsp_name->st.st_ex_mtime;
1077 state->out_change_ts = get_change_timespec(smb1req->conn,
1078 result, result->fsp_name);
1079 state->out_allocation_size =
1080 SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1081 &(result->fsp_name->st));
1082 state->out_end_of_file = result->fsp_name->st.st_ex_size;
1083 if (state->out_file_attributes == 0) {
1084 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1085 }
1086 state->out_file_id_persistent = result->op->global->open_persistent_id;
1087 state->out_file_id_volatile = result->op->global->open_volatile_id;
1088 state->out_context_blobs = out_context_blobs;
1089
1090 DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1091 fsp_str_dbg(result), fsp_fnum_dbg(result)));
1092
1093 tevent_req_done(req);
1094 return tevent_req_post(req, ev);
1095 }
1096
1097 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1098 TALLOC_CTX *mem_ctx,
1099 uint8_t *out_oplock_level,
1100 uint32_t *out_create_action,
1101 struct timespec *out_creation_ts,
1102 struct timespec *out_last_access_ts,
1103 struct timespec *out_last_write_ts,
1104 struct timespec *out_change_ts,
1105 uint64_t *out_allocation_size,
1106 uint64_t *out_end_of_file,
1107 uint32_t *out_file_attributes,
1108 uint64_t *out_file_id_persistent,
1109 uint64_t *out_file_id_volatile,
1110 struct smb2_create_blobs *out_context_blobs)
1111 {
1112 NTSTATUS status;
1113 struct smbd_smb2_create_state *state = tevent_req_data(req,
1114 struct smbd_smb2_create_state);
1115
1116 if (tevent_req_is_nterror(req, &status)) {
1117 tevent_req_received(req);
1118 return status;
1119 }
1120
1121 *out_oplock_level = state->out_oplock_level;
1122 *out_create_action = state->out_create_action;
1123 *out_creation_ts = state->out_creation_ts;
1124 *out_last_access_ts = state->out_last_access_ts;
1125 *out_last_write_ts = state->out_last_write_ts;
1126 *out_change_ts = state->out_change_ts;
1127 *out_allocation_size = state->out_allocation_size;
1128 *out_end_of_file = state->out_end_of_file;
1129 *out_file_attributes = state->out_file_attributes;
1130 *out_file_id_persistent = state->out_file_id_persistent;
1131 *out_file_id_volatile = state->out_file_id_volatile;
1132 *out_context_blobs = state->out_context_blobs;
1133
1134 talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1135
1136 tevent_req_received(req);
1137 return NT_STATUS_OK;
1138 }
1139
1140 /*********************************************************
1141 Code for dealing with deferred opens.
1142 *********************************************************/
1143
1144 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1145 struct timeval *p_request_time,
1146 void **pp_state)
1147 {
1148 struct smbd_smb2_create_state *state = NULL;
1149 struct tevent_req *req = NULL;
1150
1151 if (!smb2req) {
1152 return false;
1153 }
1154 req = smb2req->subreq;
1155 if (!req) {
1156 return false;
1157 }
1158 state = tevent_req_data(req, struct smbd_smb2_create_state);
1159 if (!state) {
1160 return false;
1161 }
1162 if (!state->open_was_deferred) {
1163 return false;
1164 }
1165 if (p_request_time) {
1166 *p_request_time = state->request_time;
1167 }
1168 if (pp_state) {
1169 *pp_state = (void *)state->private_data.data;
1170 }
1171 return true;
1172 }
1173
1174 /*********************************************************
1175 Re-process this call early - requested by message or
1176 close.
1177 *********************************************************/
1178
1179 static struct smbd_smb2_request *find_open_smb2req(
1180 struct smbd_server_connection *sconn, uint64_t mid)
1181 {
1182 struct smbd_smb2_request *smb2req;
1183
1184 for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1185 uint64_t message_id;
1186 if (smb2req->subreq == NULL) {
1187 /* This message has been processed. */
1188 continue;
1189 }
1190 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1191 /* This message has been processed. */
1192 continue;
1193 }
1194 message_id = get_mid_from_smb2req(smb2req);
1195 if (message_id == mid) {
1196 return smb2req;
1197 }
1198 }
1199 return NULL;
1200 }
1201
1202 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1203 {
1204 struct smbd_smb2_create_state *state = NULL;
1205 struct smbd_smb2_request *smb2req;
1206
1207 smb2req = find_open_smb2req(sconn, mid);
1208
1209 if (!smb2req) {
1210 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1211 (unsigned long long)mid));
1212 return false;
1213 }
1214 if (!smb2req->subreq) {
1215 return false;
1216 }
1217 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1218 return false;
1219 }
1220 state = tevent_req_data(smb2req->subreq,
1221 struct smbd_smb2_create_state);
1222 if (!state) {
1223 return false;
1224 }
1225 /* It's not in progress if there's no timeout event. */
1226 if (!state->open_was_deferred) {
1227 return false;
1228 }
1229
1230 DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1231 (unsigned long long)mid));
1232
1233 return true;
1234 }
1235
1236 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1237 uint64_t mid)
1238 {
1239 struct smbd_smb2_create_state *state = NULL;
1240
1241 if (!smb2req->subreq) {
1242 return;
1243 }
1244 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1245 return;
1246 }
1247 state = tevent_req_data(smb2req->subreq,
1248 struct smbd_smb2_create_state);
1249 if (!state) {
1250 return;
1251 }
1252
1253 DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1254 "mid %llu\n",
1255 (unsigned long long)mid ));
1256
1257 state->open_was_deferred = false;
1258 /* Ensure we don't have any outstanding timer event. */
1259 TALLOC_FREE(state->te);
1260 /* Ensure we don't have any outstanding immediate event. */
1261 TALLOC_FREE(state->im);
1262 }
1263
1264 void remove_deferred_open_message_smb2(
1265 struct smbd_server_connection *sconn, uint64_t mid)
1266 {
1267 struct smbd_smb2_request *smb2req;
1268
1269 smb2req = find_open_smb2req(sconn, mid);
1270
1271 if (!smb2req) {
1272 DEBUG(10,("remove_deferred_open_message_smb2: "
1273 "can't find mid %llu\n",
1274 (unsigned long long)mid ));
1275 return;
1276 }
1277 remove_deferred_open_message_smb2_internal(smb2req, mid);
1278 }
1279
1280 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1281 struct tevent_immediate *im,
1282 void *private_data)
1283 {
1284 struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1285 struct smbd_smb2_request);
1286 struct smbd_server_connection *sconn = smb2req->sconn;
1287 uint64_t mid = get_mid_from_smb2req(smb2req);
1288 NTSTATUS status;
1289
1290 DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1291 "re-dispatching mid %llu\n",
1292 (unsigned long long)mid ));
1293
1294 status = smbd_smb2_request_dispatch(smb2req);
1295 if (!NT_STATUS_IS_OK(status)) {
1296 smbd_server_connection_terminate(sconn, nt_errstr(status));
1297 return;
1298 }
1299 }
1300
1301 bool schedule_deferred_open_message_smb2(
1302 struct smbd_server_connection *sconn, uint64_t mid)
1303 {
1304 struct smbd_smb2_create_state *state = NULL;
1305 struct smbd_smb2_request *smb2req;
1306
1307 smb2req = find_open_smb2req(sconn, mid);
1308
1309 if (!smb2req) {
1310 DEBUG(10,("schedule_deferred_open_message_smb2: "
1311 "can't find mid %llu\n",
1312 (unsigned long long)mid ));
1313 return false;
1314 }
1315 if (!smb2req->subreq) {
1316 return false;
1317 }
1318 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1319 return false;
1320 }
1321 state = tevent_req_data(smb2req->subreq,
1322 struct smbd_smb2_create_state);
1323 if (!state) {
1324 return false;
1325 }
1326
1327 /* Ensure we don't have any outstanding timer event. */
1328 TALLOC_FREE(state->te);
1329 /* Ensure we don't have any outstanding immediate event. */
1330 TALLOC_FREE(state->im);
1331
1332 /*
1333 * This is subtle. We must null out the callback
1334 * before rescheduling, else the first call to
1335 * tevent_req_nterror() causes the _receive()
1336 * function to be called, this causing tevent_req_post()
1337 * to crash.
1338 */
1339 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1340
1341 state->im = tevent_create_immediate(smb2req);
1342 if (!state->im) {
1343 smbd_server_connection_terminate(smb2req->sconn,
1344 nt_errstr(NT_STATUS_NO_MEMORY));
1345 return false;
1346 }
1347
1348 DEBUG(10,("schedule_deferred_open_message_smb2: "
1349 "re-processing mid %llu\n",
1350 (unsigned long long)mid ));
1351
1352 tevent_schedule_immediate(state->im,
1353 smb2req->sconn->ev_ctx,
1354 smbd_smb2_create_request_dispatch_immediate,
1355 smb2req);
1356
1357 return true;
1358 }
1359
1360 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1361 {
1362 struct smbd_smb2_request *smb2req = NULL;
1363 struct smbd_smb2_create_state *state = tevent_req_data(req,
1364 struct smbd_smb2_create_state);
1365 uint64_t mid;
1366
1367 if (!state) {
1368 return false;
1369 }
1370
1371 if (!state->smb2req) {
1372 return false;
1373 }
1374
1375 smb2req = state->smb2req;
1376 mid = get_mid_from_smb2req(smb2req);
1377
1378 if (is_deferred_open_async(state->private_data.data)) {
1379 /* Can't cancel an async create. */
1380 return false;
1381 }
1382
1383 remove_deferred_open_message_smb2_internal(smb2req, mid);
1384
1385 tevent_req_defer_callback(req, smb2req->sconn->ev_ctx);
1386 tevent_req_nterror(req, NT_STATUS_CANCELLED);
1387 return true;
1388 }
1389
1390 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1391 struct timeval request_time,
1392 struct timeval timeout,
1393 struct file_id id,
1394 char *private_data,
1395 size_t priv_len)
1396 {
1397 struct tevent_req *req = NULL;
1398 struct smbd_smb2_create_state *state = NULL;
1399 struct timeval end_time;
1400
1401 if (!smb2req) {
1402 return false;
1403 }
1404 req = smb2req->subreq;
1405 if (!req) {
1406 return false;
1407 }
1408 state = tevent_req_data(req, struct smbd_smb2_create_state);
1409 if (!state) {
1410 return false;
1411 }
1412 state->id = id;
1413 state->request_time = request_time;
1414 state->private_data = data_blob_talloc(state, private_data,
1415 priv_len);
1416 if (!state->private_data.data) {
1417 return false;
1418 }
1419
1420 /* Re-schedule us to retry on timer expiry. */
1421 end_time = timeval_sum(&request_time, &timeout);
1422
1423 DEBUG(10,("push_deferred_open_message_smb2: "
1424 "timeout at %s\n",
1425 timeval_string(talloc_tos(),
1426 &end_time,
1427 true) ));
1428
1429 state->open_was_deferred = true;
1430
1431 /* allow this request to be canceled */
1432 tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1433
1434 return true;
1435 }
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