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Add 'bool use_privs' to smbd_calculate_access_mask().
[Samba/gebeck_regimport.git] / source3 / smbd / smb2_create.c
blob0d9a146b2323f45c77ff8f58963ee566388dfd2c
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 if (smb2req->cancelled) {
288 uint64_t mid = get_mid_from_smb2req(smb2req);
289 DEBUG(10,("smbd_smb2_request_create_done: cancelled mid %llu\n",
290 (unsigned long long)mid ));
291 error = smbd_smb2_request_error(smb2req, NT_STATUS_CANCELLED);
292 if (!NT_STATUS_IS_OK(error)) {
293 smbd_server_connection_terminate(smb2req->sconn,
294 nt_errstr(error));
295 return;
296 }
297 return;
298 }
299
300 status = smbd_smb2_create_recv(tsubreq,
301 smb2req,
302 &out_oplock_level,
303 &out_create_action,
304 &out_creation_time,
305 &out_last_access_time,
306 &out_last_write_time,
307 &out_change_time,
308 &out_allocation_size,
309 &out_end_of_file,
310 &out_file_attributes,
311 &out_file_id_persistent,
312 &out_file_id_volatile,
313 &out_context_blobs);
314 if (!NT_STATUS_IS_OK(status)) {
315 error = smbd_smb2_request_error(smb2req, status);
316 if (!NT_STATUS_IS_OK(error)) {
317 smbd_server_connection_terminate(smb2req->sconn,
318 nt_errstr(error));
319 return;
320 }
321 return;
322 }
323
324 status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
325 if (!NT_STATUS_IS_OK(status)) {
326 error = smbd_smb2_request_error(smb2req, status);
327 if (!NT_STATUS_IS_OK(error)) {
328 smbd_server_connection_terminate(smb2req->sconn,
329 nt_errstr(error));
330 return;
331 }
332 return;
333 }
334
335 if (out_context_buffer.length > 0) {
336 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
337 }
338
339 outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
340 if (outbody.data == NULL) {
341 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
342 if (!NT_STATUS_IS_OK(error)) {
343 smbd_server_connection_terminate(smb2req->sconn,
344 nt_errstr(error));
345 return;
346 }
347 return;
348 }
349
350 SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */
351 SCVAL(outbody.data, 0x02,
352 out_oplock_level); /* oplock level */
353 SCVAL(outbody.data, 0x03, 0); /* reserved */
354 SIVAL(outbody.data, 0x04,
355 out_create_action); /* create action */
356 SBVAL(outbody.data, 0x08,
357 out_creation_time); /* creation time */
358 SBVAL(outbody.data, 0x10,
359 out_last_access_time); /* last access time */
360 SBVAL(outbody.data, 0x18,
361 out_last_write_time); /* last write time */
362 SBVAL(outbody.data, 0x20,
363 out_change_time); /* change time */
364 SBVAL(outbody.data, 0x28,
365 out_allocation_size); /* allocation size */
366 SBVAL(outbody.data, 0x30,
367 out_end_of_file); /* end of file */
368 SIVAL(outbody.data, 0x38,
369 out_file_attributes); /* file attributes */
370 SIVAL(outbody.data, 0x3C, 0); /* reserved */
371 SBVAL(outbody.data, 0x40,
372 out_file_id_persistent); /* file id (persistent) */
373 SBVAL(outbody.data, 0x48,
374 out_file_id_volatile); /* file id (volatile) */
375 SIVAL(outbody.data, 0x50,
376 out_context_buffer_offset); /* create contexts offset */
377 SIVAL(outbody.data, 0x54,
378 out_context_buffer.length); /* create contexts length */
379
380 outdyn = out_context_buffer;
381
382 error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
383 if (!NT_STATUS_IS_OK(error)) {
384 smbd_server_connection_terminate(smb2req->sconn,
385 nt_errstr(error));
386 return;
387 }
388 }
389
390 struct smbd_smb2_create_state {
391 struct smbd_smb2_request *smb2req;
392 struct smb_request *smb1req;
393 struct timed_event *te;
394 struct tevent_immediate *im;
395 struct timeval request_time;
396 struct file_id id;
397 DATA_BLOB private_data;
398 uint8_t out_oplock_level;
399 uint32_t out_create_action;
400 NTTIME out_creation_time;
401 NTTIME out_last_access_time;
402 NTTIME out_last_write_time;
403 NTTIME out_change_time;
404 uint64_t out_allocation_size;
405 uint64_t out_end_of_file;
406 uint32_t out_file_attributes;
407 uint64_t out_file_id_persistent;
408 uint64_t out_file_id_volatile;
409 struct smb2_create_blobs out_context_blobs;
410 };
411
412 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
413 struct tevent_context *ev,
414 struct smbd_smb2_request *smb2req,
415 uint8_t in_oplock_level,
416 uint32_t in_impersonation_level,
417 uint32_t in_desired_access,
418 uint32_t in_file_attributes,
419 uint32_t in_share_access,
420 uint32_t in_create_disposition,
421 uint32_t in_create_options,
422 const char *in_name,
423 struct smb2_create_blobs in_context_blobs)
424 {
425 struct tevent_req *req = NULL;
426 struct smbd_smb2_create_state *state = NULL;
427 NTSTATUS status;
428 struct smb_request *smb1req = NULL;
429 files_struct *result = NULL;
430 int info;
431 struct timespec write_time_ts;
432 struct smb2_create_blobs out_context_blobs;
433 int requested_oplock_level;
434 struct smb2_create_blob *dhnc = NULL;
435 struct smb2_create_blob *dh2c = NULL;
436 struct smbXsrv_open *op = NULL;
437
438 ZERO_STRUCT(out_context_blobs);
439
440 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
441 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
442 } else {
443 requested_oplock_level = in_oplock_level;
444 }
445
446
447 if (smb2req->subreq == NULL) {
448 /* New create call. */
449 req = tevent_req_create(mem_ctx, &state,
450 struct smbd_smb2_create_state);
451 if (req == NULL) {
452 return NULL;
453 }
454 state->smb2req = smb2req;
455
456 smb1req = smbd_smb2_fake_smb_request(smb2req);
457 if (tevent_req_nomem(smb1req, req)) {
458 return tevent_req_post(req, ev);
459 }
460 state->smb1req = smb1req;
461 smb2req->subreq = req;
462 DEBUG(10,("smbd_smb2_create: name[%s]\n",
463 in_name));
464 } else {
465 /* Re-entrant create call. */
466 req = smb2req->subreq;
467 state = tevent_req_data(req,
468 struct smbd_smb2_create_state);
469 smb1req = state->smb1req;
470 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
471 in_name ));
472 }
473
474 dhnc = smb2_create_blob_find(&in_context_blobs,
475 SMB2_CREATE_TAG_DHNC);
476
477 if (dhnc) {
478 if (dhnc->data.length != 16) {
479 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
480 return tevent_req_post(req, ev);
481 }
482 if (in_context_blobs.num_blobs != 1) {
483 /*
484 * DHNC should be the only one.
485 */
486 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
487 return tevent_req_post(req, ev);
488 }
489 }
490
491 dh2c = smb2_create_blob_find(&in_context_blobs,
492 SMB2_CREATE_TAG_DH2C);
493 if (dh2c) {
494 if (dh2c->data.length != 36) {
495 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
496 return tevent_req_post(req, ev);
497 }
498 if (in_context_blobs.num_blobs != 1) {
499 /*
500 * DH2C should be the only one.
501 */
502 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
503 return tevent_req_post(req, ev);
504 }
505 }
506
507 if (IS_IPC(smb1req->conn)) {
508 const char *pipe_name = in_name;
509
510 if (dhnc || dh2c) {
511 /* durable handles are not supported on IPC$ */
512 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
513 return tevent_req_post(req, ev);
514 }
515
516 if (!lp_nt_pipe_support()) {
517 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
518 return tevent_req_post(req, ev);
519 }
520
521 status = open_np_file(smb1req, pipe_name, &result);
522 if (!NT_STATUS_IS_OK(status)) {
523 tevent_req_nterror(req, status);
524 return tevent_req_post(req, ev);
525 }
526 info = FILE_WAS_OPENED;
527 } else if (CAN_PRINT(smb1req->conn)) {
528 if (dhnc || dh2c) {
529 /* durable handles are not supported on printers */
530 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
531 return tevent_req_post(req, ev);
532 }
533
534 status = file_new(smb1req, smb1req->conn, &result);
535 if(!NT_STATUS_IS_OK(status)) {
536 tevent_req_nterror(req, status);
537 return tevent_req_post(req, ev);
538 }
539
540 status = print_spool_open(result, in_name,
541 smb1req->vuid);
542 if (!NT_STATUS_IS_OK(status)) {
543 file_free(smb1req, result);
544 tevent_req_nterror(req, status);
545 return tevent_req_post(req, ev);
546 }
547 info = FILE_WAS_CREATED;
548 } else {
549 char *fname;
550 struct smb2_create_blob *exta = NULL;
551 struct ea_list *ea_list = NULL;
552 struct smb2_create_blob *mxac = NULL;
553 NTTIME max_access_time = 0;
554 struct smb2_create_blob *secd = NULL;
555 struct security_descriptor *sec_desc = NULL;
556 struct smb2_create_blob *dhnq = NULL;
557 struct smb2_create_blob *alsi = NULL;
558 uint64_t allocation_size = 0;
559 struct smb2_create_blob *twrp = NULL;
560 struct smb2_create_blob *qfid = NULL;
561 struct GUID create_guid = GUID_zero();
562 bool update_open = false;
563 bool durable_requested = false;
564 uint32_t durable_timeout_msec = 0;
565 bool do_durable_reconnect = false;
566 struct smb2_create_blob *dh2q = NULL;
567
568 exta = smb2_create_blob_find(&in_context_blobs,
569 SMB2_CREATE_TAG_EXTA);
570 mxac = smb2_create_blob_find(&in_context_blobs,
571 SMB2_CREATE_TAG_MXAC);
572 secd = smb2_create_blob_find(&in_context_blobs,
573 SMB2_CREATE_TAG_SECD);
574 dhnq = smb2_create_blob_find(&in_context_blobs,
575 SMB2_CREATE_TAG_DHNQ);
576 alsi = smb2_create_blob_find(&in_context_blobs,
577 SMB2_CREATE_TAG_ALSI);
578 twrp = smb2_create_blob_find(&in_context_blobs,
579 SMB2_CREATE_TAG_TWRP);
580 qfid = smb2_create_blob_find(&in_context_blobs,
581 SMB2_CREATE_TAG_QFID);
582 dh2q = smb2_create_blob_find(&in_context_blobs,
583 SMB2_CREATE_TAG_DH2Q);
584
585 fname = talloc_strdup(state, in_name);
586 if (tevent_req_nomem(fname, req)) {
587 return tevent_req_post(req, ev);
588 }
589
590 if (exta) {
591 ea_list = read_nttrans_ea_list(mem_ctx,
592 (const char *)exta->data.data, exta->data.length);
593 if (!ea_list) {
594 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
595 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
596 return tevent_req_post(req, ev);
597 }
598 }
599
600 if (mxac) {
601 if (mxac->data.length == 0) {
602 max_access_time = 0;
603 } else if (mxac->data.length == 8) {
604 max_access_time = BVAL(mxac->data.data, 0);
605 } else {
606 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
607 return tevent_req_post(req, ev);
608 }
609 }
610
611 if (secd) {
612 enum ndr_err_code ndr_err;
613
614 sec_desc = talloc_zero(state, struct security_descriptor);
615 if (tevent_req_nomem(sec_desc, req)) {
616 return tevent_req_post(req, ev);
617 }
618
619 ndr_err = ndr_pull_struct_blob(&secd->data,
620 sec_desc, sec_desc,
621 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
622 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
623 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
624 ndr_errstr(ndr_err)));
625 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
626 return tevent_req_post(req, ev);
627 }
628 }
629
630 if (dhnq) {
631 if (dhnq->data.length != 16) {
632 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
633 return tevent_req_post(req, ev);
634 }
635
636 if (dh2q) {
637 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
638 return tevent_req_post(req, ev);
639 }
640
641 /*
642 * durable handle request is processed below.
643 */
644 durable_requested = true;
645 /*
646 * Set the timeout to 16 mins.
647 *
648 * TODO: test this against Windows 2012
649 * as the default for durable v2 is 1 min.
650 */
651 durable_timeout_msec = (16*60*1000);
652 }
653
654 if (dh2q) {
655 const uint8_t *p = dh2q->data.data;
656 uint32_t durable_v2_timeout = 0;
657 DATA_BLOB create_guid_blob;
658
659 if (dh2q->data.length != 32) {
660 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
661 return tevent_req_post(req, ev);
662 }
663
664 if (dhnq) {
665 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
666 return tevent_req_post(req, ev);
667 }
668
669 durable_v2_timeout = IVAL(p, 0);
670 create_guid_blob = data_blob_const(p + 16, 16);
671
672 status = GUID_from_ndr_blob(&create_guid_blob,
673 &create_guid);
674 if (tevent_req_nterror(req, status)) {
675 return tevent_req_post(req, ev);
676 }
677 /*
678 * we need to store the create_guid later
679 */
680 update_open = true;
681
682 /*
683 * durable handle v2 request processed below
684 */
685 durable_requested = true;
686 durable_timeout_msec = durable_v2_timeout;
687 if (durable_timeout_msec == 0) {
688 /*
689 * Set the timeout to 1 min as default.
690 *
691 * This matches Windows 2012.
692 */
693 durable_timeout_msec = (60*1000);
694 }
695 }
696
697 if (dhnc) {
698 NTTIME now = timeval_to_nttime(&smb2req->request_time);
699 uint64_t persistent_id;
700
701 persistent_id = BVAL(dhnc->data.data, 0);
702
703 status = smb2srv_open_recreate(smb2req->sconn->conn,
704 smb1req->conn->session_info,
705 persistent_id, create_guid,
706 now, &op);
707 if (!NT_STATUS_IS_OK(status)) {
708 DEBUG(3, ("smbd_smb2_create_send: "
709 "smb2srv_open_recreate v1 failed: %s\n",
710 nt_errstr(status)));
711 tevent_req_nterror(req, status);
712 return tevent_req_post(req, ev);
713 }
714
715 DEBUG(10, ("smb2_create_send: DHNC: %s recreate the "
716 "smb2srv_open struct for a durable handle.\n",
717 op->global->durable ? "did" : "could not"));
718
719 if (!op->global->durable) {
720 talloc_free(op);
721 tevent_req_nterror(req,
722 NT_STATUS_OBJECT_NAME_NOT_FOUND);
723 return tevent_req_post(req, ev);
724 }
725
726 do_durable_reconnect = true;
727 }
728
729 if (dh2c) {
730 const uint8_t *p = dh2c->data.data;
731 NTTIME now = timeval_to_nttime(&smb2req->request_time);
732 uint64_t persistent_id;
733 DATA_BLOB create_guid_blob;
734
735 persistent_id = BVAL(p, 0);
736 create_guid_blob = data_blob_const(p + 16, 16);
737
738 status = GUID_from_ndr_blob(&create_guid_blob,
739 &create_guid);
740 if (tevent_req_nterror(req, status)) {
741 return tevent_req_post(req, ev);
742 }
743
744 status = smb2srv_open_recreate(smb2req->sconn->conn,
745 smb1req->conn->session_info,
746 persistent_id, create_guid,
747 now, &op);
748 if (!NT_STATUS_IS_OK(status)) {
749 DEBUG(3, ("smbd_smb2_create_send: "
750 "smb2srv_open_recreate v2 failed: %s\n",
751 nt_errstr(status)));
752 tevent_req_nterror(req, status);
753 return tevent_req_post(req, ev);
754 }
755
756 DEBUG(10, ("smb2_create_send: DH2C: %s recreate the "
757 "smb2srv_open struct for a durable handle.\n",
758 op->global->durable ? "did" : "could not"));
759
760 if (!op->global->durable) {
761 talloc_free(op);
762 tevent_req_nterror(req,
763 NT_STATUS_OBJECT_NAME_NOT_FOUND);
764 return tevent_req_post(req, ev);
765 }
766
767 do_durable_reconnect = true;
768 }
769
770 if (alsi) {
771 if (alsi->data.length != 8) {
772 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
773 return tevent_req_post(req, ev);
774 }
775 allocation_size = BVAL(alsi->data.data, 0);
776 }
777
778 if (twrp) {
779 NTTIME nttime;
780 time_t t;
781 struct tm *tm;
782
783 if (twrp->data.length != 8) {
784 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
785 return tevent_req_post(req, ev);
786 }
787
788 nttime = BVAL(twrp->data.data, 0);
789 t = nt_time_to_unix(nttime);
790 tm = gmtime(&t);
791
792 TALLOC_FREE(fname);
793 fname = talloc_asprintf(state,
794 "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
795 tm->tm_year + 1900,
796 tm->tm_mon + 1,
797 tm->tm_mday,
798 tm->tm_hour,
799 tm->tm_min,
800 tm->tm_sec,
801 in_name);
802 if (tevent_req_nomem(fname, req)) {
803 return tevent_req_post(req, ev);
804 }
805 }
806
807 if (qfid) {
808 if (qfid->data.length != 0) {
809 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
810 return tevent_req_post(req, ev);
811 }
812 }
813
814 /* these are ignored for SMB2 */
815 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
816 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
817
818 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
819
820 DEBUG(10, ("smbd_smb2_create_send: open execution phase\n"));
821
822 /*
823 * For the backend file open procedure, there are
824 * two possible modes: durable_reconnect or not.
825 */
826 if (do_durable_reconnect) {
827 DATA_BLOB new_cookie = data_blob_null;
828
829 status = SMB_VFS_DURABLE_RECONNECT(smb1req->conn,
830 smb1req,
831 op,
832 op->global->backend_cookie,
833 op, &result, &new_cookie);
834 if (!NT_STATUS_IS_OK(status)) {
835 NTSTATUS return_status;
836
837 return_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
838
839 DEBUG(3, ("smbd_smb2_create_send: "
840 "durable_reconnect failed: %s => %s\n",
841 nt_errstr(status),
842 nt_errstr(return_status)));
843
844 tevent_req_nterror(req, return_status);
845 return tevent_req_post(req, ev);
846 }
847
848 data_blob_free(&op->global->backend_cookie);
849 op->global->backend_cookie = new_cookie;
850
851 op->status = NT_STATUS_OK;
852 op->global->disconnect_time = 0;
853
854 status = smbXsrv_open_update(op);
855 if (!NT_STATUS_IS_OK(status)) {
856 tevent_req_nterror(req, status);
857 return tevent_req_post(req, ev);
858 }
859
860 info = FILE_WAS_OPENED;
861 } else {
862 struct smb_filename *smb_fname = NULL;
863
864 /*
865 * For a DFS path the function parse_dfs_path()
866 * will do the path processing.
867 */
868
869 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
870 /* convert '\\' into '/' */
871 status = check_path_syntax(fname);
872 if (!NT_STATUS_IS_OK(status)) {
873 tevent_req_nterror(req, status);
874 return tevent_req_post(req, ev);
875 }
876 }
877
878 status = filename_convert(req,
879 smb1req->conn,
880 smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
881 fname,
882 0, /* unix_convert flags */
883 NULL, /* ppath_contains_wcards */
884 &smb_fname);
885 if (!NT_STATUS_IS_OK(status)) {
886 tevent_req_nterror(req, status);
887 return tevent_req_post(req, ev);
888 }
889
890 status = SMB_VFS_CREATE_FILE(smb1req->conn,
891 smb1req,
892 0, /* root_dir_fid */
893 smb_fname,
894 in_desired_access,
895 in_share_access,
896 in_create_disposition,
897 in_create_options,
898 in_file_attributes,
899 map_smb2_oplock_levels_to_samba(requested_oplock_level),
900 allocation_size,
901 0, /* private_flags */
902 sec_desc,
903 ea_list,
904 &result,
905 &info);
906 if (!NT_STATUS_IS_OK(status)) {
907 if (open_was_deferred(smb1req->sconn, smb1req->mid)) {
908 return req;
909 }
910 tevent_req_nterror(req, status);
911 return tevent_req_post(req, ev);
912 }
913 op = result->op;
914 }
915
916 /*
917 * here we have op == result->op
918 */
919
920 DEBUG(10, ("smbd_smb2_create_send: "
921 "response construction phase\n"));
922
923 if (mxac) {
924 NTTIME last_write_time;
925
926 unix_timespec_to_nt_time(&last_write_time,
927 result->fsp_name->st.st_ex_mtime);
928 if (last_write_time != max_access_time) {
929 uint8_t p[8];
930 uint32_t max_access_granted;
931 DATA_BLOB blob = data_blob_const(p, sizeof(p));
932
933 status = smbd_calculate_access_mask(smb1req->conn,
934 result->fsp_name,
935 false,
936 SEC_FLAG_MAXIMUM_ALLOWED,
937 &max_access_granted);
938
939 SIVAL(p, 0, NT_STATUS_V(status));
940 SIVAL(p, 4, max_access_granted);
941
942 status = smb2_create_blob_add(state,
943 &out_context_blobs,
944 SMB2_CREATE_TAG_MXAC,
945 blob);
946 if (!NT_STATUS_IS_OK(status)) {
947 tevent_req_nterror(req, status);
948 return tevent_req_post(req, ev);
949 }
950 }
951 }
952
953 if (durable_requested &&
954 BATCH_OPLOCK_TYPE(result->oplock_type))
955 {
956 status = SMB_VFS_DURABLE_COOKIE(result,
957 op,
958 &op->global->backend_cookie);
959 if (!NT_STATUS_IS_OK(status)) {
960 op->global->backend_cookie = data_blob_null;
961 }
962 }
963 if (op->global->backend_cookie.length > 0) {
964 update_open = true;
965
966 op->global->durable = true;
967 op->global->durable_timeout_msec = durable_timeout_msec;
968 }
969
970 if (update_open) {
971 op->global->create_guid = create_guid;
972
973 status = smbXsrv_open_update(op);
974 DEBUG(10, ("smb2_create_send: smbXsrv_open_update "
975 "returned %s\n",
976 nt_errstr(status)));
977 if (!NT_STATUS_IS_OK(status)) {
978 tevent_req_nterror(req, status);
979 return tevent_req_post(req, ev);
980 }
981 }
982
983 if (dhnq && op->global->durable) {
984 uint8_t p[8] = { 0, };
985 DATA_BLOB blob = data_blob_const(p, sizeof(p));
986
987 status = smb2_create_blob_add(state,
988 &out_context_blobs,
989 SMB2_CREATE_TAG_DHNQ,
990 blob);
991 if (!NT_STATUS_IS_OK(status)) {
992 tevent_req_nterror(req, status);
993 return tevent_req_post(req, ev);
994 }
995 }
996
997 if (dh2q && op->global->durable) {
998 uint8_t p[8] = { 0, };
999 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1000 uint32_t durable_v2_response_flags = 0;
1001
1002 SIVAL(p, 0, op->global->durable_timeout_msec);
1003 SIVAL(p, 4, durable_v2_response_flags);
1004
1005 status = smb2_create_blob_add(state, &out_context_blobs,
1006 SMB2_CREATE_TAG_DH2Q,
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 (qfid) {
1015 uint8_t p[32];
1016 uint64_t file_index = get_FileIndex(result->conn,
1017 &result->fsp_name->st);
1018 DATA_BLOB blob = data_blob_const(p, sizeof(p));
1019
1020 ZERO_STRUCT(p);
1021
1022 /* From conversations with Microsoft engineers at
1023 the MS plugfest. The first 8 bytes are the "volume index"
1024 == inode, the second 8 bytes are the "volume id",
1025 == dev. This will be updated in the SMB2 doc. */
1026 SBVAL(p, 0, file_index);
1027 SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
1028
1029 status = smb2_create_blob_add(state, &out_context_blobs,
1030 SMB2_CREATE_TAG_QFID,
1031 blob);
1032 if (!NT_STATUS_IS_OK(status)) {
1033 tevent_req_nterror(req, status);
1034 return tevent_req_post(req, ev);
1035 }
1036 }
1037 }
1038
1039 smb2req->compat_chain_fsp = smb1req->chain_fsp;
1040
1041 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat))) {
1042 state->out_oplock_level = in_oplock_level;
1043 } else {
1044 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
1045 }
1046
1047 if ((in_create_disposition == FILE_SUPERSEDE)
1048 && (info == FILE_WAS_OVERWRITTEN)) {
1049 state->out_create_action = FILE_WAS_SUPERSEDED;
1050 } else {
1051 state->out_create_action = info;
1052 }
1053 state->out_file_attributes = dos_mode(result->conn,
1054 result->fsp_name);
1055 /* Deal with other possible opens having a modified
1056 write time. JRA. */
1057 ZERO_STRUCT(write_time_ts);
1058 get_file_infos(result->file_id, 0, NULL, &write_time_ts);
1059 if (!null_timespec(write_time_ts)) {
1060 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
1061 }
1062
1063 unix_timespec_to_nt_time(&state->out_creation_time,
1064 get_create_timespec(smb1req->conn, result,
1065 result->fsp_name));
1066 unix_timespec_to_nt_time(&state->out_last_access_time,
1067 result->fsp_name->st.st_ex_atime);
1068 unix_timespec_to_nt_time(&state->out_last_write_time,
1069 result->fsp_name->st.st_ex_mtime);
1070 unix_timespec_to_nt_time(&state->out_change_time,
1071 get_change_timespec(smb1req->conn, result,
1072 result->fsp_name));
1073 state->out_allocation_size =
1074 SMB_VFS_GET_ALLOC_SIZE(smb1req->conn, result,
1075 &(result->fsp_name->st));
1076 state->out_end_of_file = result->fsp_name->st.st_ex_size;
1077 if (state->out_file_attributes == 0) {
1078 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
1079 }
1080 state->out_file_id_persistent = result->op->global->open_persistent_id;
1081 state->out_file_id_volatile = result->op->global->open_volatile_id;
1082 state->out_context_blobs = out_context_blobs;
1083
1084 DEBUG(10,("smbd_smb2_create_send: %s - %s\n",
1085 fsp_str_dbg(result), fsp_fnum_dbg(result)));
1086
1087 tevent_req_done(req);
1088 return tevent_req_post(req, ev);
1089 }
1090
1091 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
1092 TALLOC_CTX *mem_ctx,
1093 uint8_t *out_oplock_level,
1094 uint32_t *out_create_action,
1095 NTTIME *out_creation_time,
1096 NTTIME *out_last_access_time,
1097 NTTIME *out_last_write_time,
1098 NTTIME *out_change_time,
1099 uint64_t *out_allocation_size,
1100 uint64_t *out_end_of_file,
1101 uint32_t *out_file_attributes,
1102 uint64_t *out_file_id_persistent,
1103 uint64_t *out_file_id_volatile,
1104 struct smb2_create_blobs *out_context_blobs)
1105 {
1106 NTSTATUS status;
1107 struct smbd_smb2_create_state *state = tevent_req_data(req,
1108 struct smbd_smb2_create_state);
1109
1110 if (tevent_req_is_nterror(req, &status)) {
1111 tevent_req_received(req);
1112 return status;
1113 }
1114
1115 *out_oplock_level = state->out_oplock_level;
1116 *out_create_action = state->out_create_action;
1117 *out_creation_time = state->out_creation_time;
1118 *out_last_access_time = state->out_last_access_time;
1119 *out_last_write_time = state->out_last_write_time;
1120 *out_change_time = state->out_change_time;
1121 *out_allocation_size = state->out_allocation_size;
1122 *out_end_of_file = state->out_end_of_file;
1123 *out_file_attributes = state->out_file_attributes;
1124 *out_file_id_persistent = state->out_file_id_persistent;
1125 *out_file_id_volatile = state->out_file_id_volatile;
1126 *out_context_blobs = state->out_context_blobs;
1127
1128 talloc_steal(mem_ctx, state->out_context_blobs.blobs);
1129
1130 tevent_req_received(req);
1131 return NT_STATUS_OK;
1132 }
1133
1134 /*********************************************************
1135 Code for dealing with deferred opens.
1136 *********************************************************/
1137
1138 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
1139 struct timeval *p_request_time,
1140 void **pp_state)
1141 {
1142 struct smbd_smb2_create_state *state = NULL;
1143 struct tevent_req *req = NULL;
1144
1145 if (!smb2req) {
1146 return false;
1147 }
1148 if (smb2req->async_te == NULL) {
1149 return false;
1150 }
1151 req = smb2req->subreq;
1152 if (!req) {
1153 return false;
1154 }
1155 state = tevent_req_data(req, struct smbd_smb2_create_state);
1156 if (!state) {
1157 return false;
1158 }
1159 if (p_request_time) {
1160 *p_request_time = state->request_time;
1161 }
1162 if (pp_state) {
1163 *pp_state = (void *)state->private_data.data;
1164 }
1165 return true;
1166 }
1167
1168 /*********************************************************
1169 Re-process this call early - requested by message or
1170 close.
1171 *********************************************************/
1172
1173 static struct smbd_smb2_request *find_open_smb2req(
1174 struct smbd_server_connection *sconn, uint64_t mid)
1175 {
1176 struct smbd_smb2_request *smb2req;
1177
1178 for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
1179 uint64_t message_id;
1180 if (smb2req->subreq == NULL) {
1181 /* This message has been processed. */
1182 continue;
1183 }
1184 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1185 /* This message has been processed. */
1186 continue;
1187 }
1188 message_id = get_mid_from_smb2req(smb2req);
1189 if (message_id == mid) {
1190 return smb2req;
1191 }
1192 }
1193 return NULL;
1194 }
1195
1196 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
1197 {
1198 struct smbd_smb2_create_state *state = NULL;
1199 struct smbd_smb2_request *smb2req;
1200
1201 smb2req = find_open_smb2req(sconn, mid);
1202
1203 if (!smb2req) {
1204 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
1205 (unsigned long long)mid));
1206 return false;
1207 }
1208 if (!smb2req->subreq) {
1209 return false;
1210 }
1211 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1212 return false;
1213 }
1214 state = tevent_req_data(smb2req->subreq,
1215 struct smbd_smb2_create_state);
1216 if (!state) {
1217 return false;
1218 }
1219 /* It's not in progress if there's no timeout event. */
1220 if (!state->te) {
1221 return false;
1222 }
1223
1224 DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
1225 (unsigned long long)mid));
1226
1227 return true;
1228 }
1229
1230 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
1231 uint64_t mid)
1232 {
1233 struct smbd_smb2_create_state *state = NULL;
1234
1235 if (!smb2req->subreq) {
1236 return;
1237 }
1238 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1239 return;
1240 }
1241 state = tevent_req_data(smb2req->subreq,
1242 struct smbd_smb2_create_state);
1243 if (!state) {
1244 return;
1245 }
1246
1247 DEBUG(10,("remove_deferred_open_message_smb2_internal: "
1248 "mid %llu\n",
1249 (unsigned long long)mid ));
1250
1251 /* Ensure we don't have any outstanding timer event. */
1252 TALLOC_FREE(state->te);
1253 /* Ensure we don't have any outstanding immediate event. */
1254 TALLOC_FREE(state->im);
1255 }
1256
1257 void remove_deferred_open_message_smb2(
1258 struct smbd_server_connection *sconn, uint64_t mid)
1259 {
1260 struct smbd_smb2_request *smb2req;
1261
1262 smb2req = find_open_smb2req(sconn, mid);
1263
1264 if (!smb2req) {
1265 DEBUG(10,("remove_deferred_open_message_smb2: "
1266 "can't find mid %llu\n",
1267 (unsigned long long)mid ));
1268 return;
1269 }
1270 remove_deferred_open_message_smb2_internal(smb2req, mid);
1271 }
1272
1273 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1274 struct tevent_immediate *im,
1275 void *private_data)
1276 {
1277 struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1278 struct smbd_smb2_request);
1279 struct smbd_server_connection *sconn = smb2req->sconn;
1280 uint64_t mid = get_mid_from_smb2req(smb2req);
1281 NTSTATUS status;
1282
1283 DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1284 "re-dispatching mid %llu\n",
1285 (unsigned long long)mid ));
1286
1287 status = smbd_smb2_request_dispatch(smb2req);
1288 if (!NT_STATUS_IS_OK(status)) {
1289 smbd_server_connection_terminate(sconn, nt_errstr(status));
1290 return;
1291 }
1292 }
1293
1294 bool schedule_deferred_open_message_smb2(
1295 struct smbd_server_connection *sconn, uint64_t mid)
1296 {
1297 struct smbd_smb2_create_state *state = NULL;
1298 struct smbd_smb2_request *smb2req;
1299
1300 smb2req = find_open_smb2req(sconn, mid);
1301
1302 if (!smb2req) {
1303 DEBUG(10,("schedule_deferred_open_message_smb2: "
1304 "can't find mid %llu\n",
1305 (unsigned long long)mid ));
1306 return false;
1307 }
1308 if (!smb2req->subreq) {
1309 return false;
1310 }
1311 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1312 return false;
1313 }
1314 state = tevent_req_data(smb2req->subreq,
1315 struct smbd_smb2_create_state);
1316 if (!state) {
1317 return false;
1318 }
1319
1320 /* Ensure we don't have any outstanding timer event. */
1321 TALLOC_FREE(state->te);
1322 /* Ensure we don't have any outstanding immediate event. */
1323 TALLOC_FREE(state->im);
1324
1325 /*
1326 * This is subtle. We must null out the callback
1327 * before rescheduling, else the first call to
1328 * tevent_req_nterror() causes the _receive()
1329 * function to be called, this causing tevent_req_post()
1330 * to crash.
1331 */
1332 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1333
1334 state->im = tevent_create_immediate(smb2req);
1335 if (!state->im) {
1336 smbd_server_connection_terminate(smb2req->sconn,
1337 nt_errstr(NT_STATUS_NO_MEMORY));
1338 return false;
1339 }
1340
1341 DEBUG(10,("schedule_deferred_open_message_smb2: "
1342 "re-processing mid %llu\n",
1343 (unsigned long long)mid ));
1344
1345 tevent_schedule_immediate(state->im,
1346 smb2req->sconn->ev_ctx,
1347 smbd_smb2_create_request_dispatch_immediate,
1348 smb2req);
1349
1350 return true;
1351 }
1352
1353 /*********************************************************
1354 Re-process this call.
1355 *********************************************************/
1356
1357 static void smb2_deferred_open_timer(struct event_context *ev,
1358 struct timed_event *te,
1359 struct timeval _tval,
1360 void *private_data)
1361 {
1362 NTSTATUS status;
1363 struct smbd_smb2_create_state *state = NULL;
1364 struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1365 struct smbd_smb2_request);
1366
1367 DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1368 smb2req->current_idx,
1369 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1370
1371 state = tevent_req_data(smb2req->subreq,
1372 struct smbd_smb2_create_state);
1373 if (!state) {
1374 return;
1375 }
1376 /*
1377 * Null this out, don't talloc_free. It will
1378 * be talloc_free'd by the tevent library when
1379 * this returns.
1380 */
1381 state->te = NULL;
1382 /* Ensure we don't have any outstanding immediate event. */
1383 TALLOC_FREE(state->im);
1384
1385 /*
1386 * This is subtle. We must null out the callback
1387 * before rescheduling, else the first call to
1388 * tevent_req_nterror() causes the _receive()
1389 * function to be called, this causing tevent_req_post()
1390 * to crash.
1391 */
1392 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1393
1394 status = smbd_smb2_request_dispatch(smb2req);
1395
1396 if (!NT_STATUS_IS_OK(status)) {
1397 smbd_server_connection_terminate(smb2req->sconn,
1398 nt_errstr(status));
1399 }
1400 }
1401
1402 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1403 {
1404 struct smbd_smb2_request *smb2req = NULL;
1405 struct smbd_smb2_create_state *state = tevent_req_data(req,
1406 struct smbd_smb2_create_state);
1407 uint64_t mid;
1408
1409 if (!state) {
1410 return false;
1411 }
1412
1413 if (!state->smb2req) {
1414 return false;
1415 }
1416
1417 smb2req = state->smb2req;
1418 mid = get_mid_from_smb2req(smb2req);
1419
1420 if (is_deferred_open_async(state->private_data.data)) {
1421 /* Can't cancel an async create. */
1422 return false;
1423 }
1424
1425 remove_deferred_open_entry(state->id, mid,
1426 messaging_server_id(smb2req->sconn->msg_ctx));
1427 remove_deferred_open_message_smb2_internal(smb2req, mid);
1428 smb2req->cancelled = true;
1429
1430 tevent_req_done(req);
1431 return true;
1432 }
1433
1434 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1435 struct timeval request_time,
1436 struct timeval timeout,
1437 struct file_id id,
1438 char *private_data,
1439 size_t priv_len)
1440 {
1441 struct tevent_req *req = NULL;
1442 struct smbd_smb2_create_state *state = NULL;
1443 struct timeval end_time;
1444
1445 if (!smb2req) {
1446 return false;
1447 }
1448 req = smb2req->subreq;
1449 if (!req) {
1450 return false;
1451 }
1452 state = tevent_req_data(req, struct smbd_smb2_create_state);
1453 if (!state) {
1454 return false;
1455 }
1456 state->id = id;
1457 state->request_time = request_time;
1458 state->private_data = data_blob_talloc(state, private_data,
1459 priv_len);
1460 if (!state->private_data.data) {
1461 return false;
1462 }
1463
1464 /* Re-schedule us to retry on timer expiry. */
1465 end_time = timeval_sum(&request_time, &timeout);
1466
1467 DEBUG(10,("push_deferred_open_message_smb2: "
1468 "timeout at %s\n",
1469 timeval_string(talloc_tos(),
1470 &end_time,
1471 true) ));
1472
1473 state->te = tevent_add_timer(smb2req->sconn->ev_ctx,
1474 state,
1475 end_time,
1476 smb2_deferred_open_timer,
1477 smb2req);
1478 if (!state->te) {
1479 return false;
1480 }
1481
1482 /* allow this request to be canceled */
1483 tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1484
1485 return true;
1486 }
reg import