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s3: Support shadow copy display over SMB2
[Samba.git] / source3 / smbd / smb2_ioctl.c
blob48487428de50a419e8574c48c8213cd5f6fa3e2a
1 /*
2 Unix SMB/CIFS implementation.
3 Core SMB2 server
4
5 Copyright (C) Stefan Metzmacher 2009
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "smbd/smbd.h"
23 #include "smbd/globals.h"
24 #include "../libcli/smb/smb_common.h"
25 #include "../lib/util/tevent_ntstatus.h"
26 #include "rpc_server/srv_pipe_hnd.h"
27 #include "include/ntioctl.h"
28
29 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
30 struct tevent_context *ev,
31 struct smbd_smb2_request *smb2req,
32 uint32_t in_ctl_code,
33 uint64_t in_file_id_volatile,
34 DATA_BLOB in_input,
35 uint32_t in_max_output,
36 uint32_t in_flags);
37 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
38 TALLOC_CTX *mem_ctx,
39 DATA_BLOB *out_output);
40
41 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
42 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
43 {
44 const uint8_t *inhdr;
45 const uint8_t *inbody;
46 int i = req->current_idx;
47 size_t expected_body_size = 0x39;
48 size_t body_size;
49 uint32_t in_ctl_code;
50 uint64_t in_file_id_persistent;
51 uint64_t in_file_id_volatile;
52 uint32_t in_input_offset;
53 uint32_t in_input_length;
54 DATA_BLOB in_input_buffer;
55 uint32_t in_max_output_length;
56 uint32_t in_flags;
57 struct tevent_req *subreq;
58
59 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
60 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
61 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
62 }
63
64 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
65
66 body_size = SVAL(inbody, 0x00);
67 if (body_size != expected_body_size) {
68 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
69 }
70
71 in_ctl_code = IVAL(inbody, 0x04);
72 in_file_id_persistent = BVAL(inbody, 0x08);
73 in_file_id_volatile = BVAL(inbody, 0x10);
74 in_input_offset = IVAL(inbody, 0x18);
75 in_input_length = IVAL(inbody, 0x1C);
76 in_max_output_length = IVAL(inbody, 0x2C);
77 in_flags = IVAL(inbody, 0x30);
78
79 if (in_input_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
80 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
81 }
82
83 if (in_input_length > req->in.vector[i+2].iov_len) {
84 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
85 }
86
87 in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
88 in_input_buffer.length = in_input_length;
89
90 if (req->compat_chain_fsp) {
91 /* skip check */
92 } else if (in_file_id_persistent == UINT64_MAX &&
93 in_file_id_volatile == UINT64_MAX) {
94 /* without a handle */
95 } else if (in_file_id_persistent != in_file_id_volatile) {
96 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
97 }
98
99 subreq = smbd_smb2_ioctl_send(req,
100 req->sconn->smb2.event_ctx,
101 req,
102 in_ctl_code,
103 in_file_id_volatile,
104 in_input_buffer,
105 in_max_output_length,
106 in_flags);
107 if (subreq == NULL) {
108 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
109 }
110 tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
111
112 return smbd_smb2_request_pending_queue(req, subreq);
113 }
114
115 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
116 {
117 struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
118 struct smbd_smb2_request);
119 const uint8_t *inbody;
120 int i = req->current_idx;
121 uint8_t *outhdr;
122 DATA_BLOB outbody;
123 DATA_BLOB outdyn;
124 uint32_t in_ctl_code;
125 uint64_t in_file_id_persistent;
126 uint64_t in_file_id_volatile;
127 uint32_t out_input_offset;
128 uint32_t out_output_offset;
129 DATA_BLOB out_output_buffer = data_blob_null;
130 NTSTATUS status;
131 NTSTATUS error; /* transport error */
132
133 status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
134
135 DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
136 "%u status %s\n",
137 (unsigned int)out_output_buffer.length,
138 nt_errstr(status) ));
139
140 TALLOC_FREE(subreq);
141 if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
142 /* also ok */
143 } else if (!NT_STATUS_IS_OK(status)) {
144 error = smbd_smb2_request_error(req, status);
145 if (!NT_STATUS_IS_OK(error)) {
146 smbd_server_connection_terminate(req->sconn,
147 nt_errstr(error));
148 return;
149 }
150 return;
151 }
152
153 out_input_offset = SMB2_HDR_BODY + 0x30;
154 out_output_offset = SMB2_HDR_BODY + 0x30;
155
156 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
157
158 in_ctl_code = IVAL(inbody, 0x04);
159 in_file_id_persistent = BVAL(inbody, 0x08);
160 in_file_id_volatile = BVAL(inbody, 0x10);
161
162 outhdr = (uint8_t *)req->out.vector[i].iov_base;
163
164 outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
165 if (outbody.data == NULL) {
166 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
167 if (!NT_STATUS_IS_OK(error)) {
168 smbd_server_connection_terminate(req->sconn,
169 nt_errstr(error));
170 return;
171 }
172 return;
173 }
174
175 SSVAL(outbody.data, 0x00, 0x30 + 1); /* struct size */
176 SSVAL(outbody.data, 0x02, 0); /* reserved */
177 SIVAL(outbody.data, 0x04,
178 in_ctl_code); /* ctl code */
179 SBVAL(outbody.data, 0x08,
180 in_file_id_persistent); /* file id (persistent) */
181 SBVAL(outbody.data, 0x10,
182 in_file_id_volatile); /* file id (volatile) */
183 SIVAL(outbody.data, 0x18,
184 out_input_offset); /* input offset */
185 SIVAL(outbody.data, 0x1C, 0); /* input count */
186 SIVAL(outbody.data, 0x20,
187 out_output_offset); /* output offset */
188 SIVAL(outbody.data, 0x24,
189 out_output_buffer.length); /* output count */
190 SIVAL(outbody.data, 0x28, 0); /* flags */
191 SIVAL(outbody.data, 0x2C, 0); /* reserved */
192
193 /*
194 * Note: Windows Vista and 2008 send back also the
195 * input from the request. But it was fixed in
196 * Windows 7.
197 */
198 outdyn = out_output_buffer;
199
200 error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
201 __location__);
202 if (!NT_STATUS_IS_OK(error)) {
203 smbd_server_connection_terminate(req->sconn,
204 nt_errstr(error));
205 return;
206 }
207 }
208
209 struct smbd_smb2_ioctl_state {
210 struct smbd_smb2_request *smb2req;
211 struct smb_request *smbreq;
212 files_struct *fsp;
213 DATA_BLOB in_input;
214 uint32_t in_max_output;
215 DATA_BLOB out_output;
216 };
217
218 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
219 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
220
221 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
222 struct tevent_context *ev,
223 struct smbd_smb2_request *smb2req,
224 uint32_t in_ctl_code,
225 uint64_t in_file_id_volatile,
226 DATA_BLOB in_input,
227 uint32_t in_max_output,
228 uint32_t in_flags)
229 {
230 struct tevent_req *req;
231 struct smbd_smb2_ioctl_state *state;
232 struct smb_request *smbreq;
233 files_struct *fsp = NULL;
234 struct tevent_req *subreq;
235
236 req = tevent_req_create(mem_ctx, &state,
237 struct smbd_smb2_ioctl_state);
238 if (req == NULL) {
239 return NULL;
240 }
241 state->smb2req = smb2req;
242 state->smbreq = NULL;
243 state->fsp = NULL;
244 state->in_input = in_input;
245 state->in_max_output = in_max_output;
246 state->out_output = data_blob_null;
247
248 DEBUG(10, ("smbd_smb2_ioctl: ctl_code[0x%08x] file_id[0x%016llX]\n",
249 (unsigned)in_ctl_code,
250 (unsigned long long)in_file_id_volatile));
251
252 smbreq = smbd_smb2_fake_smb_request(smb2req);
253 if (tevent_req_nomem(smbreq, req)) {
254 return tevent_req_post(req, ev);
255 }
256 state->smbreq = smbreq;
257
258 if (in_file_id_volatile != UINT64_MAX) {
259 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
260 if (fsp == NULL) {
261 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
262 return tevent_req_post(req, ev);
263 }
264 if (smbreq->conn != fsp->conn) {
265 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
266 return tevent_req_post(req, ev);
267 }
268 if (smb2req->session->vuid != fsp->vuid) {
269 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
270 return tevent_req_post(req, ev);
271 }
272 state->fsp = fsp;
273 }
274
275 switch (in_ctl_code) {
276 case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
277 {
278 uint16_t in_max_referral_level;
279 DATA_BLOB in_file_name_buffer;
280 char *in_file_name_string;
281 size_t in_file_name_string_size;
282 bool ok;
283 bool overflow = false;
284 NTSTATUS status;
285 int dfs_size;
286 char *dfs_data = NULL;
287
288 if (!IS_IPC(smbreq->conn)) {
289 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
290 return tevent_req_post(req, ev);
291 }
292
293 if (!lp_host_msdfs()) {
294 tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
295 return tevent_req_post(req, ev);
296 }
297
298 if (in_input.length < (2 + 2)) {
299 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
300 return tevent_req_post(req, ev);
301 }
302
303 in_max_referral_level = SVAL(in_input.data, 0);
304 in_file_name_buffer.data = in_input.data + 2;
305 in_file_name_buffer.length = in_input.length - 2;
306
307 ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
308 in_file_name_buffer.data,
309 in_file_name_buffer.length,
310 &in_file_name_string,
311 &in_file_name_string_size);
312 if (!ok) {
313 tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
314 return tevent_req_post(req, ev);
315 }
316
317 dfs_size = setup_dfs_referral(smbreq->conn,
318 in_file_name_string,
319 in_max_referral_level,
320 &dfs_data, &status);
321 if (dfs_size < 0) {
322 tevent_req_nterror(req, status);
323 return tevent_req_post(req, ev);
324 }
325
326 if (dfs_size > in_max_output) {
327 /*
328 * TODO: we need a testsuite for this
329 */
330 overflow = true;
331 dfs_size = in_max_output;
332 }
333
334 state->out_output = data_blob_talloc(state,
335 (uint8_t *)dfs_data,
336 dfs_size);
337 SAFE_FREE(dfs_data);
338 if (dfs_size > 0 &&
339 tevent_req_nomem(state->out_output.data, req)) {
340 return tevent_req_post(req, ev);
341 }
342
343 if (overflow) {
344 tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
345 } else {
346 tevent_req_done(req);
347 }
348 return tevent_req_post(req, ev);
349 }
350 case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
351
352 if (!IS_IPC(smbreq->conn)) {
353 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
354 return tevent_req_post(req, ev);
355 }
356
357 if (fsp == NULL) {
358 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
359 return tevent_req_post(req, ev);
360 }
361
362 if (!fsp_is_np(fsp)) {
363 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
364 return tevent_req_post(req, ev);
365 }
366
367 DEBUG(10,("smbd_smb2_ioctl_send: np_write_send of size %u\n",
368 (unsigned int)in_input.length ));
369
370 subreq = np_write_send(state, ev,
371 fsp->fake_file_handle,
372 in_input.data,
373 in_input.length);
374 if (tevent_req_nomem(subreq, req)) {
375 return tevent_req_post(req, ev);
376 }
377 tevent_req_set_callback(subreq,
378 smbd_smb2_ioctl_pipe_write_done,
379 req);
380 return req;
381
382 case 0x00144064: /* FSCTL_SRV_ENUMERATE_SNAPSHOTS */
383 {
384 /*
385 * This is called to retrieve the number of Shadow Copies (a.k.a. snapshots)
386 * and return their volume names. If max_data_count is 16, then it is just
387 * asking for the number of volumes and length of the combined names.
388 *
389 * pdata is the data allocated by our caller, but that uses
390 * total_data_count (which is 0 in our case) rather than max_data_count.
391 * Allocate the correct amount and return the pointer to let
392 * it be deallocated when we return.
393 */
394 struct shadow_copy_data *shadow_data = NULL;
395 bool labels = False;
396 uint32_t labels_data_count = 0;
397 uint32_t data_count;
398 uint32_t i;
399 char *pdata;
400 NTSTATUS status;
401
402 if (in_max_output < 16) {
403 DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: "
404 "in_max_output(%u) < 16 is invalid!\n",
405 in_max_output));
406 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
407 return tevent_req_post(req, ev);
408 }
409
410 if (in_max_output > 16) {
411 labels = True;
412 }
413
414 shadow_data = TALLOC_ZERO_P(talloc_tos(),
415 struct shadow_copy_data);
416 if (tevent_req_nomem(shadow_data, req)) {
417 DEBUG(0,("TALLOC_ZERO() failed!\n"));
418 return tevent_req_post(req, ev);
419 }
420
421 /*
422 * Call the VFS routine to actually do the work.
423 */
424 if (SMB_VFS_GET_SHADOW_COPY_DATA(fsp, shadow_data, labels)
425 != 0) {
426 if (errno == ENOSYS) {
427 DEBUG(5, ("FSCTL_GET_SHADOW_COPY_DATA: "
428 "connectpath %s, not supported.\n",
429 smbreq->conn->connectpath));
430 status = NT_STATUS_NOT_SUPPORTED;
431 } else {
432 DEBUG(0,("FSCTL_GET_SHADOW_COPY_DATA: "
433 "connectpath %s, failed.\n",
434 smbreq->conn->connectpath));
435 status = map_nt_error_from_unix(errno);
436 }
437 TALLOC_FREE(shadow_data);
438 tevent_req_nterror(req, status);
439 return tevent_req_post(req, ev);
440 }
441
442 labels_data_count =
443 (shadow_data->num_volumes*2*sizeof(SHADOW_COPY_LABEL))
444 + 2;
445
446 if (labels) {
447 data_count = 12+labels_data_count+4;
448 } else {
449 data_count = 16;
450 }
451
452 if (labels && (in_max_output < data_count)) {
453 DEBUG(0, ("FSCTL_GET_SHADOW_COPY_DATA: "
454 "in_max_output(%u) too small (%u) bytes "
455 "needed!\n", in_max_output, data_count));
456 TALLOC_FREE(shadow_data);
457 tevent_req_nterror(req, NT_STATUS_BUFFER_TOO_SMALL);
458 return tevent_req_post(req, ev);
459 }
460
461 state->out_output = data_blob_talloc(state, NULL, data_count);
462 if (tevent_req_nomem(state->out_output.data, req)) {
463 return tevent_req_post(req, ev);
464 }
465
466 pdata = (char *)state->out_output.data;
467
468 /* num_volumes 4 bytes */
469 SIVAL(pdata, 0, shadow_data->num_volumes);
470
471 if (labels) {
472 /* num_labels 4 bytes */
473 SIVAL(pdata, 4, shadow_data->num_volumes);
474 }
475
476 /* needed_data_count 4 bytes */
477 SIVAL(pdata, 8, labels_data_count+4);
478
479 pdata += 12;
480
481 DEBUG(10,("FSCTL_GET_SHADOW_COPY_DATA: %u volumes for "
482 "path[%s].\n",
483 shadow_data->num_volumes, fsp_str_dbg(fsp)));
484 if (labels && shadow_data->labels) {
485 for (i=0; i<shadow_data->num_volumes; i++) {
486 srvstr_push(pdata, smbreq->flags2,
487 pdata, shadow_data->labels[i],
488 2*sizeof(SHADOW_COPY_LABEL),
489 STR_UNICODE|STR_TERMINATE);
490 pdata += 2*sizeof(SHADOW_COPY_LABEL);
491 DEBUGADD(10, ("Label[%u]: '%s'\n", i,
492 shadow_data->labels[i]));
493 }
494 }
495
496 TALLOC_FREE(shadow_data);
497
498 tevent_req_done(req);
499 return tevent_req_post(req, ev);
500 }
501
502 default:
503 if (IS_IPC(smbreq->conn)) {
504 tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
505 return tevent_req_post(req, ev);
506 }
507 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
508 return tevent_req_post(req, ev);
509 }
510
511 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
512 return tevent_req_post(req, ev);
513 }
514
515 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
516 {
517 struct tevent_req *req = tevent_req_callback_data(subreq,
518 struct tevent_req);
519 struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
520 struct smbd_smb2_ioctl_state);
521 NTSTATUS status;
522 ssize_t nwritten = -1;
523
524 status = np_write_recv(subreq, &nwritten);
525
526 DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: received %ld\n",
527 (long int)nwritten ));
528
529 TALLOC_FREE(subreq);
530 if (!NT_STATUS_IS_OK(status)) {
531 tevent_req_nterror(req, status);
532 return;
533 }
534
535 if (nwritten != state->in_input.length) {
536 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
537 return;
538 }
539
540 state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
541 if (state->in_max_output > 0 &&
542 tevent_req_nomem(state->out_output.data, req)) {
543 return;
544 }
545
546 DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: issuing np_read_send "
547 "of size %u\n",
548 (unsigned int)state->out_output.length ));
549
550 TALLOC_FREE(subreq);
551 subreq = np_read_send(state->smbreq->conn,
552 state->smb2req->sconn->smb2.event_ctx,
553 state->fsp->fake_file_handle,
554 state->out_output.data,
555 state->out_output.length);
556 if (tevent_req_nomem(subreq, req)) {
557 return;
558 }
559 tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
560 }
561
562 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
563 {
564 struct tevent_req *req = tevent_req_callback_data(subreq,
565 struct tevent_req);
566 struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
567 struct smbd_smb2_ioctl_state);
568 NTSTATUS status;
569 ssize_t nread = -1;
570 bool is_data_outstanding = false;
571
572 status = np_read_recv(subreq, &nread, &is_data_outstanding);
573
574 DEBUG(10,("smbd_smb2_ioctl_pipe_read_done: np_read_recv nread = %d "
575 "is_data_outstanding = %d, status = %s\n",
576 (int)nread,
577 (int)is_data_outstanding,
578 nt_errstr(status) ));
579
580 TALLOC_FREE(subreq);
581 if (!NT_STATUS_IS_OK(status)) {
582 tevent_req_nterror(req, status);
583 return;
584 }
585
586 state->out_output.length = nread;
587
588 tevent_req_done(req);
589 }
590
591 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
592 TALLOC_CTX *mem_ctx,
593 DATA_BLOB *out_output)
594 {
595 NTSTATUS status = NT_STATUS_OK;
596 struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
597 struct smbd_smb2_ioctl_state);
598
599 if (tevent_req_is_nterror(req, &status)) {
600 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
601 tevent_req_received(req);
602 return status;
603 }
604 }
605
606 *out_output = state->out_output;
607 talloc_steal(mem_ctx, out_output->data);
608
609 tevent_req_received(req);
610 return status;
611 }
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