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s3: Fix a winbind race leading to 100% CPU
[Samba.git] / source3 / smbd / smb2_create.c
blobfcd8945f8370ac25893371241916d38547f1d102
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
30 int map_smb2_oplock_levels_to_samba(uint8_t in_oplock_level)
31 {
32 switch(in_oplock_level) {
33 case SMB2_OPLOCK_LEVEL_NONE:
34 return NO_OPLOCK;
35 case SMB2_OPLOCK_LEVEL_II:
36 return LEVEL_II_OPLOCK;
37 case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
38 return EXCLUSIVE_OPLOCK;
39 case SMB2_OPLOCK_LEVEL_BATCH:
40 return BATCH_OPLOCK;
41 case SMB2_OPLOCK_LEVEL_LEASE:
42 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
43 "LEASE_OPLOCK_REQUESTED\n"));
44 return NO_OPLOCK;
45 default:
46 DEBUG(2,("map_smb2_oplock_levels_to_samba: "
47 "unknown level %u\n",
48 (unsigned int)in_oplock_level));
49 return NO_OPLOCK;
50 }
51 }
52
53 static uint8_t map_samba_oplock_levels_to_smb2(int oplock_type)
54 {
55 if (BATCH_OPLOCK_TYPE(oplock_type)) {
56 return SMB2_OPLOCK_LEVEL_BATCH;
57 } else if (EXCLUSIVE_OPLOCK_TYPE(oplock_type)) {
58 return SMB2_OPLOCK_LEVEL_EXCLUSIVE;
59 } else if (oplock_type == LEVEL_II_OPLOCK) {
60 /*
61 * Don't use LEVEL_II_OPLOCK_TYPE here as
62 * this also includes FAKE_LEVEL_II_OPLOCKs
63 * which are internal only.
64 */
65 return SMB2_OPLOCK_LEVEL_II;
66 } else {
67 return SMB2_OPLOCK_LEVEL_NONE;
68 }
69 }
70
71 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
72 struct tevent_context *ev,
73 struct smbd_smb2_request *smb2req,
74 uint8_t in_oplock_level,
75 uint32_t in_impersonation_level,
76 uint32_t in_desired_access,
77 uint32_t in_file_attributes,
78 uint32_t in_share_access,
79 uint32_t in_create_disposition,
80 uint32_t in_create_options,
81 const char *in_name,
82 struct smb2_create_blobs in_context_blobs);
83 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
84 TALLOC_CTX *mem_ctx,
85 uint8_t *out_oplock_level,
86 uint32_t *out_create_action,
87 NTTIME *out_creation_time,
88 NTTIME *out_last_access_time,
89 NTTIME *out_last_write_time,
90 NTTIME *out_change_time,
91 uint64_t *out_allocation_size,
92 uint64_t *out_end_of_file,
93 uint32_t *out_file_attributes,
94 uint64_t *out_file_id_persistent,
95 uint64_t *out_file_id_volatile,
96 struct smb2_create_blobs *out_context_blobs);
97
98 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
99 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
100 {
101 const uint8_t *inbody;
102 int i = smb2req->current_idx;
103 size_t expected_body_size = 0x39;
104 size_t body_size;
105 uint8_t in_oplock_level;
106 uint32_t in_impersonation_level;
107 uint32_t in_desired_access;
108 uint32_t in_file_attributes;
109 uint32_t in_share_access;
110 uint32_t in_create_disposition;
111 uint32_t in_create_options;
112 uint16_t in_name_offset;
113 uint16_t in_name_length;
114 DATA_BLOB in_name_buffer;
115 char *in_name_string;
116 size_t in_name_string_size;
117 uint32_t name_offset = 0;
118 uint32_t name_available_length = 0;
119 uint32_t in_context_offset;
120 uint32_t in_context_length;
121 DATA_BLOB in_context_buffer;
122 struct smb2_create_blobs in_context_blobs;
123 uint32_t context_offset = 0;
124 uint32_t context_available_length = 0;
125 uint32_t dyn_offset;
126 NTSTATUS status;
127 bool ok;
128 struct tevent_req *tsubreq;
129
130 if (smb2req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
131 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
132 }
133
134 inbody = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
135
136 body_size = SVAL(inbody, 0x00);
137 if (body_size != expected_body_size) {
138 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
139 }
140
141 in_oplock_level = CVAL(inbody, 0x03);
142 in_impersonation_level = IVAL(inbody, 0x04);
143 in_desired_access = IVAL(inbody, 0x18);
144 in_file_attributes = IVAL(inbody, 0x1C);
145 in_share_access = IVAL(inbody, 0x20);
146 in_create_disposition = IVAL(inbody, 0x24);
147 in_create_options = IVAL(inbody, 0x28);
148 in_name_offset = SVAL(inbody, 0x2C);
149 in_name_length = SVAL(inbody, 0x2E);
150 in_context_offset = IVAL(inbody, 0x30);
151 in_context_length = IVAL(inbody, 0x34);
152
153 /*
154 * First check if the dynamic name and context buffers
155 * are correctly specified.
156 *
157 * Note: That we don't check if the name and context buffers
158 * overlap
159 */
160
161 dyn_offset = SMB2_HDR_BODY + (body_size & 0xFFFFFFFE);
162
163 if (in_name_offset == 0 && in_name_length == 0) {
164 /* This is ok */
165 name_offset = 0;
166 } else if (in_name_offset < dyn_offset) {
167 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
168 } else {
169 name_offset = in_name_offset - dyn_offset;
170 }
171
172 if (name_offset > smb2req->in.vector[i+2].iov_len) {
173 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
174 }
175
176 name_available_length = smb2req->in.vector[i+2].iov_len - name_offset;
177
178 if (in_name_length > name_available_length) {
179 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
180 }
181
182 in_name_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base +
183 name_offset;
184 in_name_buffer.length = in_name_length;
185
186 if (in_context_offset == 0 && in_context_length == 0) {
187 /* This is ok */
188 context_offset = 0;
189 } else if (in_context_offset < dyn_offset) {
190 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
191 } else {
192 context_offset = in_context_offset - dyn_offset;
193 }
194
195 if (context_offset > smb2req->in.vector[i+2].iov_len) {
196 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
197 }
198
199 context_available_length = smb2req->in.vector[i+2].iov_len - context_offset;
200
201 if (in_context_length > context_available_length) {
202 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
203 }
204
205 in_context_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base +
206 context_offset;
207 in_context_buffer.length = in_context_length;
208
209 /*
210 * Now interpret the name and context buffers
211 */
212
213 ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
214 in_name_buffer.data,
215 in_name_buffer.length,
216 &in_name_string,
217 &in_name_string_size, false);
218 if (!ok) {
219 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
220 }
221
222 ZERO_STRUCT(in_context_blobs);
223 status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
224 if (!NT_STATUS_IS_OK(status)) {
225 return smbd_smb2_request_error(smb2req, status);
226 }
227
228 tsubreq = smbd_smb2_create_send(smb2req,
229 smb2req->sconn->smb2.event_ctx,
230 smb2req,
231 in_oplock_level,
232 in_impersonation_level,
233 in_desired_access,
234 in_file_attributes,
235 in_share_access,
236 in_create_disposition,
237 in_create_options,
238 in_name_string,
239 in_context_blobs);
240 if (tsubreq == NULL) {
241 smb2req->subreq = NULL;
242 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
243 }
244 tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
245
246 return smbd_smb2_request_pending_queue(smb2req, tsubreq);
247 }
248
249 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
250 {
251 uint8_t *reqhdr = (uint8_t *)smb2req->out.vector[smb2req->current_idx].iov_base;
252 return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
253 }
254
255 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
256 {
257 struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
258 struct smbd_smb2_request);
259 int i = smb2req->current_idx;
260 uint8_t *outhdr;
261 DATA_BLOB outbody;
262 DATA_BLOB outdyn;
263 uint8_t out_oplock_level = 0;
264 uint32_t out_create_action = 0;
265 NTTIME out_creation_time = 0;
266 NTTIME out_last_access_time = 0;
267 NTTIME out_last_write_time = 0;
268 NTTIME out_change_time = 0;
269 uint64_t out_allocation_size = 0;
270 uint64_t out_end_of_file = 0;
271 uint32_t out_file_attributes = 0;
272 uint64_t out_file_id_persistent = 0;
273 uint64_t out_file_id_volatile = 0;
274 struct smb2_create_blobs out_context_blobs;
275 DATA_BLOB out_context_buffer;
276 uint16_t out_context_buffer_offset = 0;
277 NTSTATUS status;
278 NTSTATUS error; /* transport error */
279
280 if (smb2req->cancelled) {
281 uint64_t mid = get_mid_from_smb2req(smb2req);
282 DEBUG(10,("smbd_smb2_request_create_done: cancelled mid %llu\n",
283 (unsigned long long)mid ));
284 error = smbd_smb2_request_error(smb2req, NT_STATUS_CANCELLED);
285 if (!NT_STATUS_IS_OK(error)) {
286 smbd_server_connection_terminate(smb2req->sconn,
287 nt_errstr(error));
288 return;
289 }
290 return;
291 }
292
293 status = smbd_smb2_create_recv(tsubreq,
294 smb2req,
295 &out_oplock_level,
296 &out_create_action,
297 &out_creation_time,
298 &out_last_access_time,
299 &out_last_write_time,
300 &out_change_time,
301 &out_allocation_size,
302 &out_end_of_file,
303 &out_file_attributes,
304 &out_file_id_persistent,
305 &out_file_id_volatile,
306 &out_context_blobs);
307 if (!NT_STATUS_IS_OK(status)) {
308 error = smbd_smb2_request_error(smb2req, status);
309 if (!NT_STATUS_IS_OK(error)) {
310 smbd_server_connection_terminate(smb2req->sconn,
311 nt_errstr(error));
312 return;
313 }
314 return;
315 }
316
317 status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
318 if (!NT_STATUS_IS_OK(status)) {
319 error = smbd_smb2_request_error(smb2req, status);
320 if (!NT_STATUS_IS_OK(error)) {
321 smbd_server_connection_terminate(smb2req->sconn,
322 nt_errstr(error));
323 return;
324 }
325 return;
326 }
327
328 if (out_context_buffer.length > 0) {
329 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
330 }
331
332 outhdr = (uint8_t *)smb2req->out.vector[i].iov_base;
333
334 outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
335 if (outbody.data == NULL) {
336 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
337 if (!NT_STATUS_IS_OK(error)) {
338 smbd_server_connection_terminate(smb2req->sconn,
339 nt_errstr(error));
340 return;
341 }
342 return;
343 }
344
345 SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */
346 SCVAL(outbody.data, 0x02,
347 out_oplock_level); /* oplock level */
348 SCVAL(outbody.data, 0x03, 0); /* reserved */
349 SIVAL(outbody.data, 0x04,
350 out_create_action); /* create action */
351 SBVAL(outbody.data, 0x08,
352 out_creation_time); /* creation time */
353 SBVAL(outbody.data, 0x10,
354 out_last_access_time); /* last access time */
355 SBVAL(outbody.data, 0x18,
356 out_last_write_time); /* last write time */
357 SBVAL(outbody.data, 0x20,
358 out_change_time); /* change time */
359 SBVAL(outbody.data, 0x28,
360 out_allocation_size); /* allocation size */
361 SBVAL(outbody.data, 0x30,
362 out_end_of_file); /* end of file */
363 SIVAL(outbody.data, 0x38,
364 out_file_attributes); /* file attributes */
365 SIVAL(outbody.data, 0x3C, 0); /* reserved */
366 SBVAL(outbody.data, 0x40,
367 out_file_id_persistent); /* file id (persistent) */
368 SBVAL(outbody.data, 0x48,
369 out_file_id_volatile); /* file id (volatile) */
370 SIVAL(outbody.data, 0x50,
371 out_context_buffer_offset); /* create contexts offset */
372 SIVAL(outbody.data, 0x54,
373 out_context_buffer.length); /* create contexts length */
374
375 outdyn = out_context_buffer;
376
377 error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
378 if (!NT_STATUS_IS_OK(error)) {
379 smbd_server_connection_terminate(smb2req->sconn,
380 nt_errstr(error));
381 return;
382 }
383 }
384
385 struct smbd_smb2_create_state {
386 struct smbd_smb2_request *smb2req;
387 struct smb_request *smb1req;
388 struct timed_event *te;
389 struct tevent_immediate *im;
390 struct timeval request_time;
391 struct file_id id;
392 DATA_BLOB private_data;
393 uint8_t out_oplock_level;
394 uint32_t out_create_action;
395 NTTIME out_creation_time;
396 NTTIME out_last_access_time;
397 NTTIME out_last_write_time;
398 NTTIME out_change_time;
399 uint64_t out_allocation_size;
400 uint64_t out_end_of_file;
401 uint32_t out_file_attributes;
402 uint64_t out_file_id_persistent;
403 uint64_t out_file_id_volatile;
404 struct smb2_create_blobs out_context_blobs;
405 };
406
407 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
408 struct tevent_context *ev,
409 struct smbd_smb2_request *smb2req,
410 uint8_t in_oplock_level,
411 uint32_t in_impersonation_level,
412 uint32_t in_desired_access,
413 uint32_t in_file_attributes,
414 uint32_t in_share_access,
415 uint32_t in_create_disposition,
416 uint32_t in_create_options,
417 const char *in_name,
418 struct smb2_create_blobs in_context_blobs)
419 {
420 struct tevent_req *req = NULL;
421 struct smbd_smb2_create_state *state = NULL;
422 NTSTATUS status;
423 struct smb_request *smb1req = NULL;
424 files_struct *result = NULL;
425 int info;
426 struct timespec write_time_ts;
427 struct smb2_create_blobs out_context_blobs;
428 int requested_oplock_level;
429
430 ZERO_STRUCT(out_context_blobs);
431
432 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
433 requested_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
434 } else {
435 requested_oplock_level = in_oplock_level;
436 }
437
438
439 if (!smb2req->async) {
440 /* New create call. */
441 req = tevent_req_create(mem_ctx, &state,
442 struct smbd_smb2_create_state);
443 if (req == NULL) {
444 return NULL;
445 }
446 state->smb2req = smb2req;
447 smb2req->subreq = req; /* So we can find this when going async. */
448
449 smb1req = smbd_smb2_fake_smb_request(smb2req);
450 if (tevent_req_nomem(smb1req, req)) {
451 return tevent_req_post(req, ev);
452 }
453 state->smb1req = smb1req;
454 DEBUG(10,("smbd_smb2_create: name[%s]\n",
455 in_name));
456 } else {
457 /* Re-entrant create call. */
458 req = smb2req->subreq;
459 state = tevent_req_data(req,
460 struct smbd_smb2_create_state);
461 smb1req = state->smb1req;
462 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
463 in_name ));
464 }
465
466 if (IS_IPC(smb1req->conn)) {
467 const char *pipe_name = in_name;
468
469 if (!lp_nt_pipe_support()) {
470 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
471 return tevent_req_post(req, ev);
472 }
473
474 /* Strip \\ off the name. */
475 if (pipe_name[0] == '\\') {
476 pipe_name++;
477 }
478
479 status = open_np_file(smb1req, pipe_name, &result);
480 if (!NT_STATUS_IS_OK(status)) {
481 tevent_req_nterror(req, status);
482 return tevent_req_post(req, ev);
483 }
484 info = FILE_WAS_OPENED;
485 } else if (CAN_PRINT(smb1req->conn)) {
486 status = file_new(smb1req, smb1req->conn, &result);
487 if(!NT_STATUS_IS_OK(status)) {
488 tevent_req_nterror(req, status);
489 return tevent_req_post(req, ev);
490 }
491
492 status = print_spool_open(result, in_name,
493 smb1req->vuid);
494 if (!NT_STATUS_IS_OK(status)) {
495 file_free(smb1req, result);
496 tevent_req_nterror(req, status);
497 return tevent_req_post(req, ev);
498 }
499 info = FILE_WAS_CREATED;
500 } else {
501 char *fname;
502 struct smb_filename *smb_fname = NULL;
503 struct smb2_create_blob *exta = NULL;
504 struct ea_list *ea_list = NULL;
505 struct smb2_create_blob *mxac = NULL;
506 NTTIME max_access_time = 0;
507 struct smb2_create_blob *secd = NULL;
508 struct security_descriptor *sec_desc = NULL;
509 struct smb2_create_blob *dhnq = NULL;
510 struct smb2_create_blob *dhnc = NULL;
511 struct smb2_create_blob *alsi = NULL;
512 uint64_t allocation_size = 0;
513 struct smb2_create_blob *twrp = NULL;
514 struct smb2_create_blob *qfid = NULL;
515
516 exta = smb2_create_blob_find(&in_context_blobs,
517 SMB2_CREATE_TAG_EXTA);
518 mxac = smb2_create_blob_find(&in_context_blobs,
519 SMB2_CREATE_TAG_MXAC);
520 secd = smb2_create_blob_find(&in_context_blobs,
521 SMB2_CREATE_TAG_SECD);
522 dhnq = smb2_create_blob_find(&in_context_blobs,
523 SMB2_CREATE_TAG_DHNQ);
524 dhnc = smb2_create_blob_find(&in_context_blobs,
525 SMB2_CREATE_TAG_DHNC);
526 alsi = smb2_create_blob_find(&in_context_blobs,
527 SMB2_CREATE_TAG_ALSI);
528 twrp = smb2_create_blob_find(&in_context_blobs,
529 SMB2_CREATE_TAG_TWRP);
530 qfid = smb2_create_blob_find(&in_context_blobs,
531 SMB2_CREATE_TAG_QFID);
532
533 fname = talloc_strdup(state, in_name);
534 if (tevent_req_nomem(fname, req)) {
535 return tevent_req_post(req, ev);
536 }
537
538 if (exta) {
539 if (dhnc) {
540 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
541 return tevent_req_post(req, ev);
542 }
543
544 ea_list = read_nttrans_ea_list(mem_ctx,
545 (const char *)exta->data.data, exta->data.length);
546 if (!ea_list) {
547 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
548 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
549 return tevent_req_post(req, ev);
550 }
551 }
552
553 if (mxac) {
554 if (dhnc) {
555 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
556 return tevent_req_post(req, ev);
557 }
558
559 if (mxac->data.length == 0) {
560 max_access_time = 0;
561 } else if (mxac->data.length == 8) {
562 max_access_time = BVAL(mxac->data.data, 0);
563 } else {
564 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
565 return tevent_req_post(req, ev);
566 }
567 }
568
569 if (secd) {
570 enum ndr_err_code ndr_err;
571
572 if (dhnc) {
573 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
574 return tevent_req_post(req, ev);
575 }
576
577 sec_desc = talloc_zero(state, struct security_descriptor);
578 if (tevent_req_nomem(sec_desc, req)) {
579 return tevent_req_post(req, ev);
580 }
581
582 ndr_err = ndr_pull_struct_blob(&secd->data,
583 sec_desc, sec_desc,
584 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
585 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
586 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
587 ndr_errstr(ndr_err)));
588 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
589 return tevent_req_post(req, ev);
590 }
591 }
592
593 if (dhnq) {
594 if (dhnc) {
595 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
596 return tevent_req_post(req, ev);
597 }
598
599 if (dhnq->data.length != 16) {
600 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
601 return tevent_req_post(req, ev);
602 }
603 /*
604 * we don't support durable handles yet
605 * and have to ignore this
606 */
607 }
608
609 if (dhnc) {
610 if (dhnc->data.length != 16) {
611 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
612 return tevent_req_post(req, ev);
613 }
614 /* we don't support durable handles yet */
615 tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
616 return tevent_req_post(req, ev);
617 }
618
619 if (alsi) {
620 if (dhnc) {
621 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
622 return tevent_req_post(req, ev);
623 }
624
625 if (alsi->data.length != 8) {
626 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
627 return tevent_req_post(req, ev);
628 }
629 allocation_size = BVAL(alsi->data.data, 0);
630 }
631
632 if (twrp) {
633 NTTIME nttime;
634 time_t t;
635 struct tm *tm;
636
637 if (dhnc) {
638 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
639 return tevent_req_post(req, ev);
640 }
641
642 if (twrp->data.length != 8) {
643 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
644 return tevent_req_post(req, ev);
645 }
646
647 nttime = BVAL(twrp->data.data, 0);
648 t = nt_time_to_unix(nttime);
649 tm = gmtime(&t);
650
651 TALLOC_FREE(fname);
652 fname = talloc_asprintf(state,
653 "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
654 tm->tm_year + 1900,
655 tm->tm_mon + 1,
656 tm->tm_mday,
657 tm->tm_hour,
658 tm->tm_min,
659 tm->tm_sec,
660 in_name);
661 if (tevent_req_nomem(fname, req)) {
662 return tevent_req_post(req, ev);
663 }
664 }
665
666 if (qfid) {
667 if (qfid->data.length != 0) {
668 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
669 return tevent_req_post(req, ev);
670 }
671 }
672
673 /* these are ignored for SMB2 */
674 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
675 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
676
677 /*
678 * For a DFS path the function parse_dfs_path()
679 * will do the path processing.
680 */
681
682 if (!(smb1req->flags2 & FLAGS2_DFS_PATHNAMES)) {
683 /* convert '\\' into '/' */
684 status = check_path_syntax(fname);
685 if (!NT_STATUS_IS_OK(status)) {
686 tevent_req_nterror(req, status);
687 return tevent_req_post(req, ev);
688 }
689 }
690
691 status = filename_convert(req,
692 smb1req->conn,
693 smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
694 fname,
695 0,
696 NULL,
697 &smb_fname);
698 if (!NT_STATUS_IS_OK(status)) {
699 tevent_req_nterror(req, status);
700 return tevent_req_post(req, ev);
701 }
702
703 in_file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
704
705 status = SMB_VFS_CREATE_FILE(smb1req->conn,
706 smb1req,
707 0, /* root_dir_fid */
708 smb_fname,
709 in_desired_access,
710 in_share_access,
711 in_create_disposition,
712 in_create_options,
713 in_file_attributes,
714 map_smb2_oplock_levels_to_samba(requested_oplock_level),
715 allocation_size,
716 0, /* private_flags */
717 sec_desc,
718 ea_list,
719 &result,
720 &info);
721 if (!NT_STATUS_IS_OK(status)) {
722 if (open_was_deferred(smb1req->mid)) {
723 return req;
724 }
725 tevent_req_nterror(req, status);
726 return tevent_req_post(req, ev);
727 }
728
729 if (mxac) {
730 NTTIME last_write_time;
731
732 unix_timespec_to_nt_time(&last_write_time,
733 result->fsp_name->st.st_ex_mtime);
734 if (last_write_time != max_access_time) {
735 uint8_t p[8];
736 uint32_t max_access_granted;
737 DATA_BLOB blob = data_blob_const(p, sizeof(p));
738
739 status = smbd_calculate_access_mask(smb1req->conn,
740 result->fsp_name,
741 /*
742 * at this stage
743 * it exists
744 */
745 true,
746 SEC_FLAG_MAXIMUM_ALLOWED,
747 &max_access_granted);
748
749 SIVAL(p, 0, NT_STATUS_V(status));
750 SIVAL(p, 4, max_access_granted);
751
752 status = smb2_create_blob_add(state,
753 &out_context_blobs,
754 SMB2_CREATE_TAG_MXAC,
755 blob);
756 if (!NT_STATUS_IS_OK(status)) {
757 tevent_req_nterror(req, status);
758 return tevent_req_post(req, ev);
759 }
760 }
761 }
762
763 if (qfid) {
764 uint8_t p[32];
765 uint64_t file_index = get_FileIndex(result->conn,
766 &result->fsp_name->st);
767 DATA_BLOB blob = data_blob_const(p, sizeof(p));
768
769 ZERO_STRUCT(p);
770
771 /* From conversations with Microsoft engineers at
772 the MS plugfest. The first 8 bytes are the "volume index"
773 == inode, the second 8 bytes are the "volume id",
774 == dev. This will be updated in the SMB2 doc. */
775 SBVAL(p, 0, file_index);
776 SIVAL(p, 8, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
777
778 status = smb2_create_blob_add(state, &out_context_blobs,
779 SMB2_CREATE_TAG_QFID,
780 blob);
781 if (!NT_STATUS_IS_OK(status)) {
782 tevent_req_nterror(req, status);
783 return tevent_req_post(req, ev);
784 }
785 }
786 }
787
788 smb2req->compat_chain_fsp = smb1req->chain_fsp;
789
790 if(lp_fake_oplocks(SNUM(smb2req->tcon->compat_conn))) {
791 state->out_oplock_level = in_oplock_level;
792 } else {
793 state->out_oplock_level = map_samba_oplock_levels_to_smb2(result->oplock_type);
794 }
795
796 if ((in_create_disposition == FILE_SUPERSEDE)
797 && (info == FILE_WAS_OVERWRITTEN)) {
798 state->out_create_action = FILE_WAS_SUPERSEDED;
799 } else {
800 state->out_create_action = info;
801 }
802 state->out_file_attributes = dos_mode(result->conn,
803 result->fsp_name);
804 /* Deal with other possible opens having a modified
805 write time. JRA. */
806 ZERO_STRUCT(write_time_ts);
807 get_file_infos(result->file_id, 0, NULL, &write_time_ts);
808 if (!null_timespec(write_time_ts)) {
809 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
810 }
811
812 unix_timespec_to_nt_time(&state->out_creation_time,
813 get_create_timespec(smb1req->conn, result,
814 result->fsp_name));
815 unix_timespec_to_nt_time(&state->out_last_access_time,
816 result->fsp_name->st.st_ex_atime);
817 unix_timespec_to_nt_time(&state->out_last_write_time,
818 result->fsp_name->st.st_ex_mtime);
819 unix_timespec_to_nt_time(&state->out_change_time,
820 get_change_timespec(smb1req->conn, result,
821 result->fsp_name));
822 state->out_allocation_size =
823 result->fsp_name->st.st_ex_blksize *
824 result->fsp_name->st.st_ex_blocks;
825 state->out_end_of_file = result->fsp_name->st.st_ex_size;
826 if (state->out_file_attributes == 0) {
827 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
828 }
829 state->out_file_id_persistent = result->fnum;
830 state->out_file_id_volatile = result->fnum;
831 state->out_context_blobs = out_context_blobs;
832
833 tevent_req_done(req);
834 return tevent_req_post(req, ev);
835 }
836
837 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
838 TALLOC_CTX *mem_ctx,
839 uint8_t *out_oplock_level,
840 uint32_t *out_create_action,
841 NTTIME *out_creation_time,
842 NTTIME *out_last_access_time,
843 NTTIME *out_last_write_time,
844 NTTIME *out_change_time,
845 uint64_t *out_allocation_size,
846 uint64_t *out_end_of_file,
847 uint32_t *out_file_attributes,
848 uint64_t *out_file_id_persistent,
849 uint64_t *out_file_id_volatile,
850 struct smb2_create_blobs *out_context_blobs)
851 {
852 NTSTATUS status;
853 struct smbd_smb2_create_state *state = tevent_req_data(req,
854 struct smbd_smb2_create_state);
855
856 if (tevent_req_is_nterror(req, &status)) {
857 tevent_req_received(req);
858 return status;
859 }
860
861 *out_oplock_level = state->out_oplock_level;
862 *out_create_action = state->out_create_action;
863 *out_creation_time = state->out_creation_time;
864 *out_last_access_time = state->out_last_access_time;
865 *out_last_write_time = state->out_last_write_time;
866 *out_change_time = state->out_change_time;
867 *out_allocation_size = state->out_allocation_size;
868 *out_end_of_file = state->out_end_of_file;
869 *out_file_attributes = state->out_file_attributes;
870 *out_file_id_persistent = state->out_file_id_persistent;
871 *out_file_id_volatile = state->out_file_id_volatile;
872 *out_context_blobs = state->out_context_blobs;
873
874 talloc_steal(mem_ctx, state->out_context_blobs.blobs);
875
876 tevent_req_received(req);
877 return NT_STATUS_OK;
878 }
879
880 /*********************************************************
881 Code for dealing with deferred opens.
882 *********************************************************/
883
884 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
885 struct timeval *p_request_time,
886 void **pp_state)
887 {
888 struct smbd_smb2_create_state *state = NULL;
889 struct tevent_req *req = NULL;
890
891 if (!smb2req) {
892 return false;
893 }
894 if (!smb2req->async) {
895 return false;
896 }
897 req = smb2req->subreq;
898 if (!req) {
899 return false;
900 }
901 state = tevent_req_data(req, struct smbd_smb2_create_state);
902 if (!state) {
903 return false;
904 }
905 if (p_request_time) {
906 *p_request_time = state->request_time;
907 }
908 if (pp_state) {
909 *pp_state = (void *)state->private_data.data;
910 }
911 return true;
912 }
913
914 /*********************************************************
915 Re-process this call early - requested by message or
916 close.
917 *********************************************************/
918
919 static struct smbd_smb2_request *find_open_smb2req(
920 struct smbd_server_connection *sconn, uint64_t mid)
921 {
922 struct smbd_smb2_request *smb2req;
923
924 for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
925 uint64_t message_id;
926 if (smb2req->subreq == NULL) {
927 /* This message has been processed. */
928 continue;
929 }
930 if (!tevent_req_is_in_progress(smb2req->subreq)) {
931 /* This message has been processed. */
932 continue;
933 }
934 message_id = get_mid_from_smb2req(smb2req);
935 if (message_id == mid) {
936 return smb2req;
937 }
938 }
939 return NULL;
940 }
941
942 bool open_was_deferred_smb2(struct smbd_server_connection *sconn, uint64_t mid)
943 {
944 struct smbd_smb2_create_state *state = NULL;
945 struct smbd_smb2_request *smb2req;
946
947 smb2req = find_open_smb2req(sconn, mid);
948
949 if (!smb2req) {
950 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
951 (unsigned long long)mid));
952 return false;
953 }
954 if (!smb2req->subreq) {
955 return false;
956 }
957 if (!tevent_req_is_in_progress(smb2req->subreq)) {
958 return false;
959 }
960 state = tevent_req_data(smb2req->subreq,
961 struct smbd_smb2_create_state);
962 if (!state) {
963 return false;
964 }
965 /* It's not in progress if there's no timeout event. */
966 if (!state->te) {
967 return false;
968 }
969
970 DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
971 (unsigned long long)mid));
972
973 return true;
974 }
975
976 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
977 uint64_t mid)
978 {
979 struct smbd_smb2_create_state *state = NULL;
980
981 if (!smb2req->subreq) {
982 return;
983 }
984 if (!tevent_req_is_in_progress(smb2req->subreq)) {
985 return;
986 }
987 state = tevent_req_data(smb2req->subreq,
988 struct smbd_smb2_create_state);
989 if (!state) {
990 return;
991 }
992
993 DEBUG(10,("remove_deferred_open_message_smb2_internal: "
994 "mid %llu\n",
995 (unsigned long long)mid ));
996
997 /* Ensure we don't have any outstanding timer event. */
998 TALLOC_FREE(state->te);
999 /* Ensure we don't have any outstanding immediate event. */
1000 TALLOC_FREE(state->im);
1001 }
1002
1003 void remove_deferred_open_message_smb2(
1004 struct smbd_server_connection *sconn, uint64_t mid)
1005 {
1006 struct smbd_smb2_request *smb2req;
1007
1008 smb2req = find_open_smb2req(sconn, mid);
1009
1010 if (!smb2req) {
1011 DEBUG(10,("remove_deferred_open_message_smb2: "
1012 "can't find mid %llu\n",
1013 (unsigned long long)mid ));
1014 return;
1015 }
1016 remove_deferred_open_message_smb2_internal(smb2req, mid);
1017 }
1018
1019 static void smbd_smb2_create_request_dispatch_immediate(struct tevent_context *ctx,
1020 struct tevent_immediate *im,
1021 void *private_data)
1022 {
1023 struct smbd_smb2_request *smb2req = talloc_get_type_abort(private_data,
1024 struct smbd_smb2_request);
1025 struct smbd_server_connection *sconn = smb2req->sconn;
1026 uint64_t mid = get_mid_from_smb2req(smb2req);
1027 NTSTATUS status;
1028
1029 DEBUG(10,("smbd_smb2_create_request_dispatch_immediate: "
1030 "re-dispatching mid %llu\n",
1031 (unsigned long long)mid ));
1032
1033 status = smbd_smb2_request_dispatch(smb2req);
1034 if (!NT_STATUS_IS_OK(status)) {
1035 smbd_server_connection_terminate(sconn, nt_errstr(status));
1036 return;
1037 }
1038 }
1039
1040 void schedule_deferred_open_message_smb2(
1041 struct smbd_server_connection *sconn, uint64_t mid)
1042 {
1043 struct smbd_smb2_create_state *state = NULL;
1044 struct smbd_smb2_request *smb2req;
1045
1046 smb2req = find_open_smb2req(sconn, mid);
1047
1048 if (!smb2req) {
1049 DEBUG(10,("schedule_deferred_open_message_smb2: "
1050 "can't find mid %llu\n",
1051 (unsigned long long)mid ));
1052 return;
1053 }
1054 if (!smb2req->subreq) {
1055 return;
1056 }
1057 if (!tevent_req_is_in_progress(smb2req->subreq)) {
1058 return;
1059 }
1060 state = tevent_req_data(smb2req->subreq,
1061 struct smbd_smb2_create_state);
1062 if (!state) {
1063 return;
1064 }
1065
1066 /* Ensure we don't have any outstanding timer event. */
1067 TALLOC_FREE(state->te);
1068 /* Ensure we don't have any outstanding immediate event. */
1069 TALLOC_FREE(state->im);
1070
1071 /*
1072 * This is subtle. We must null out the callback
1073 * before resheduling, else the first call to
1074 * tevent_req_nterror() causes the _receive()
1075 * function to be called, this causing tevent_req_post()
1076 * to crash.
1077 */
1078 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1079
1080 state->im = tevent_create_immediate(smb2req);
1081 if (!state->im) {
1082 smbd_server_connection_terminate(smb2req->sconn,
1083 nt_errstr(NT_STATUS_NO_MEMORY));
1084 }
1085
1086 DEBUG(10,("schedule_deferred_open_message_smb2: "
1087 "re-processing mid %llu\n",
1088 (unsigned long long)mid ));
1089
1090 tevent_schedule_immediate(state->im,
1091 smb2req->sconn->smb2.event_ctx,
1092 smbd_smb2_create_request_dispatch_immediate,
1093 smb2req);
1094 }
1095
1096 /*********************************************************
1097 Re-process this call.
1098 *********************************************************/
1099
1100 static void smb2_deferred_open_timer(struct event_context *ev,
1101 struct timed_event *te,
1102 struct timeval _tval,
1103 void *private_data)
1104 {
1105 NTSTATUS status;
1106 struct smbd_smb2_create_state *state = NULL;
1107 struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
1108 struct smbd_smb2_request);
1109
1110 DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
1111 smb2req->current_idx,
1112 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
1113
1114 state = tevent_req_data(smb2req->subreq,
1115 struct smbd_smb2_create_state);
1116 if (!state) {
1117 return;
1118 }
1119 /*
1120 * Null this out, don't talloc_free. It will
1121 * be talloc_free'd by the tevent library when
1122 * this returns.
1123 */
1124 state->te = NULL;
1125 /* Ensure we don't have any outstanding immediate event. */
1126 TALLOC_FREE(state->im);
1127
1128 /*
1129 * This is subtle. We must null out the callback
1130 * before resheduling, else the first call to
1131 * tevent_req_nterror() causes the _receive()
1132 * function to be called, this causing tevent_req_post()
1133 * to crash.
1134 */
1135 tevent_req_set_callback(smb2req->subreq, NULL, NULL);
1136
1137 status = smbd_smb2_request_dispatch(smb2req);
1138
1139 if (!NT_STATUS_IS_OK(status)) {
1140 smbd_server_connection_terminate(smb2req->sconn,
1141 nt_errstr(status));
1142 }
1143 }
1144
1145 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1146 {
1147 struct smbd_smb2_request *smb2req = NULL;
1148 struct smbd_smb2_create_state *state = tevent_req_data(req,
1149 struct smbd_smb2_create_state);
1150 uint64_t mid;
1151
1152 if (!state) {
1153 return false;
1154 }
1155
1156 if (!state->smb2req) {
1157 return false;
1158 }
1159
1160 smb2req = state->smb2req;
1161 mid = get_mid_from_smb2req(smb2req);
1162
1163 remove_deferred_open_entry(state->id, mid,
1164 sconn_server_id(smb2req->sconn));
1165 remove_deferred_open_message_smb2_internal(smb2req, mid);
1166 smb2req->cancelled = true;
1167
1168 tevent_req_done(req);
1169 return true;
1170 }
1171
1172 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1173 struct timeval request_time,
1174 struct timeval timeout,
1175 struct file_id id,
1176 char *private_data,
1177 size_t priv_len)
1178 {
1179 struct tevent_req *req = NULL;
1180 struct smbd_smb2_create_state *state = NULL;
1181 struct timeval end_time;
1182
1183 if (!smb2req) {
1184 return false;
1185 }
1186 req = smb2req->subreq;
1187 if (!req) {
1188 return false;
1189 }
1190 state = tevent_req_data(req, struct smbd_smb2_create_state);
1191 if (!state) {
1192 return false;
1193 }
1194 state->id = id;
1195 state->request_time = request_time;
1196 state->private_data = data_blob_talloc(state, private_data,
1197 priv_len);
1198 if (!state->private_data.data) {
1199 return false;
1200 }
1201
1202 #if 1
1203 /* Boo - turns out this isn't what W2K8R2
1204 does. It actually sends the STATUS_PENDING
1205 message followed by the STATUS_SHARING_VIOLATION
1206 message. Surely this means that all open
1207 calls (even on directories) will potentially
1208 fail in a chain.... ? And I've seen directory
1209 opens as the start of a chain. JRA.
1210
1211 Update: 19th May 2010. Talking with Microsoft
1212 engineers at the plugfest this is a bug in
1213 Windows. Re-enable this code.
1214 */
1215 /*
1216 * More subtlety. To match W2K8R2 don't
1217 * send a "gone async" message if it's simply
1218 * a STATUS_SHARING_VIOLATION (short) wait, not
1219 * an oplock break wait. We do this by prematurely
1220 * setting smb2req->async flag.
1221 */
1222 if (timeout.tv_sec < 2) {
1223 DEBUG(10,("push_deferred_open_message_smb2: "
1224 "short timer wait (usec = %u). "
1225 "Don't send async message.\n",
1226 (unsigned int)timeout.tv_usec ));
1227 smb2req->async = true;
1228 }
1229 #endif
1230
1231 /* Re-schedule us to retry on timer expiry. */
1232 end_time = timeval_sum(&request_time, &timeout);
1233
1234 DEBUG(10,("push_deferred_open_message_smb2: "
1235 "timeout at %s\n",
1236 timeval_string(talloc_tos(),
1237 &end_time,
1238 true) ));
1239
1240 state->te = event_add_timed(smb2req->sconn->smb2.event_ctx,
1241 state,
1242 end_time,
1243 smb2_deferred_open_timer,
1244 smb2req);
1245 if (!state->te) {
1246 return false;
1247 }
1248
1249 /* allow this request to be canceled */
1250 tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1251
1252 return true;
1253 }
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