Line data Source code
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 "system/filesys.h"
23 : #include "smbd/smbd.h"
24 : #include "smbd/globals.h"
25 : #include "../libcli/smb/smb_common.h"
26 : #include "libcli/security/security.h"
27 : #include "../lib/util/tevent_ntstatus.h"
28 : #include "rpc_server/srv_pipe_hnd.h"
29 : #include "lib/util/sys_rw_data.h"
30 :
31 : #undef DBGC_CLASS
32 : #define DBGC_CLASS DBGC_SMB2
33 :
34 : static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
35 : struct tevent_context *ev,
36 : struct smbd_smb2_request *smb2req,
37 : struct files_struct *in_fsp,
38 : uint8_t in_flags,
39 : uint32_t in_length,
40 : uint64_t in_offset,
41 : uint32_t in_minimum,
42 : uint32_t in_remaining);
43 : static NTSTATUS smbd_smb2_read_recv(struct tevent_req *req,
44 : TALLOC_CTX *mem_ctx,
45 : DATA_BLOB *out_data,
46 : uint32_t *out_remaining);
47 :
48 : static void smbd_smb2_request_read_done(struct tevent_req *subreq);
49 12671 : NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req)
50 : {
51 12671 : struct smbXsrv_connection *xconn = req->xconn;
52 48 : NTSTATUS status;
53 48 : const uint8_t *inbody;
54 48 : uint8_t in_flags;
55 48 : uint32_t in_length;
56 48 : uint64_t in_offset;
57 48 : uint64_t in_file_id_persistent;
58 48 : uint64_t in_file_id_volatile;
59 48 : struct files_struct *in_fsp;
60 48 : uint32_t in_minimum_count;
61 48 : uint32_t in_remaining_bytes;
62 48 : struct tevent_req *subreq;
63 :
64 12671 : status = smbd_smb2_request_verify_sizes(req, 0x31);
65 12671 : if (!NT_STATUS_IS_OK(status)) {
66 0 : return smbd_smb2_request_error(req, status);
67 : }
68 12671 : inbody = SMBD_SMB2_IN_BODY_PTR(req);
69 :
70 12671 : if (xconn->protocol >= PROTOCOL_SMB3_02) {
71 7939 : in_flags = CVAL(inbody, 0x03);
72 : } else {
73 4732 : in_flags = 0;
74 : }
75 12671 : in_length = IVAL(inbody, 0x04);
76 12671 : in_offset = BVAL(inbody, 0x08);
77 12671 : in_file_id_persistent = BVAL(inbody, 0x10);
78 12671 : in_file_id_volatile = BVAL(inbody, 0x18);
79 12671 : in_minimum_count = IVAL(inbody, 0x20);
80 12671 : in_remaining_bytes = IVAL(inbody, 0x28);
81 :
82 : /* check the max read size */
83 12671 : if (in_length > xconn->smb2.server.max_read) {
84 0 : DEBUG(2,("smbd_smb2_request_process_read: "
85 : "client ignored max read: %s: 0x%08X: 0x%08X\n",
86 : __location__, in_length, xconn->smb2.server.max_read));
87 0 : return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
88 : }
89 :
90 12671 : status = smbd_smb2_request_verify_creditcharge(req, in_length);
91 12671 : if (!NT_STATUS_IS_OK(status)) {
92 0 : return smbd_smb2_request_error(req, status);
93 : }
94 :
95 12671 : in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
96 12671 : if (in_fsp == NULL) {
97 0 : return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
98 : }
99 :
100 12671 : subreq = smbd_smb2_read_send(req, req->sconn->ev_ctx,
101 : req, in_fsp,
102 : in_flags,
103 : in_length,
104 : in_offset,
105 : in_minimum_count,
106 : in_remaining_bytes);
107 12671 : if (subreq == NULL) {
108 0 : return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
109 : }
110 12671 : tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
111 :
112 12671 : return smbd_smb2_request_pending_queue(req, subreq, 500);
113 : }
114 :
115 12671 : static void smbd_smb2_request_read_done(struct tevent_req *subreq)
116 : {
117 12671 : struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
118 : struct smbd_smb2_request);
119 48 : uint16_t body_size;
120 12671 : uint8_t body_padding = req->xconn->smb2.smbtorture.read_body_padding;
121 48 : DATA_BLOB outbody;
122 48 : DATA_BLOB outdyn;
123 48 : uint8_t out_data_offset;
124 12671 : DATA_BLOB out_data_buffer = data_blob_null;
125 12671 : uint32_t out_data_remaining = 0;
126 48 : NTSTATUS status;
127 48 : NTSTATUS error; /* transport error */
128 :
129 12671 : status = smbd_smb2_read_recv(subreq,
130 : req,
131 : &out_data_buffer,
132 : &out_data_remaining);
133 12671 : TALLOC_FREE(subreq);
134 12671 : if (!NT_STATUS_IS_OK(status)) {
135 605 : error = smbd_smb2_request_error(req, status);
136 605 : if (!NT_STATUS_IS_OK(error)) {
137 0 : smbd_server_connection_terminate(req->xconn,
138 : nt_errstr(error));
139 605 : return;
140 : }
141 605 : return;
142 : }
143 :
144 : /*
145 : * Only FSCTL_SMBTORTURE_GLOBAL_READ_RESPONSE_BODY_PADDING8
146 : * sets body_padding to a value different from 0.
147 : */
148 12066 : body_size = 0x10 + body_padding;
149 12066 : out_data_offset = SMB2_HDR_BODY + body_size;
150 :
151 12066 : outbody = smbd_smb2_generate_outbody(req, body_size);
152 12066 : if (outbody.data == NULL) {
153 0 : error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
154 0 : if (!NT_STATUS_IS_OK(error)) {
155 0 : smbd_server_connection_terminate(req->xconn,
156 : nt_errstr(error));
157 0 : return;
158 : }
159 0 : return;
160 : }
161 :
162 12066 : SSVAL(outbody.data, 0x00, 0x10 + 1); /* struct size */
163 12066 : SCVAL(outbody.data, 0x02,
164 : out_data_offset); /* data offset */
165 12066 : SCVAL(outbody.data, 0x03, 0); /* reserved */
166 12066 : SIVAL(outbody.data, 0x04,
167 : out_data_buffer.length); /* data length */
168 12066 : SIVAL(outbody.data, 0x08,
169 : out_data_remaining); /* data remaining */
170 12066 : SIVAL(outbody.data, 0x0C, 0); /* reserved */
171 12066 : if (body_padding != 0) {
172 8 : memset(outbody.data + 0x10, 0, body_padding);
173 : }
174 :
175 12066 : outdyn = out_data_buffer;
176 :
177 12066 : error = smbd_smb2_request_done(req, outbody, &outdyn);
178 12066 : if (!NT_STATUS_IS_OK(error)) {
179 0 : smbd_server_connection_terminate(req->xconn,
180 : nt_errstr(error));
181 0 : return;
182 : }
183 : }
184 :
185 : struct smbd_smb2_read_state {
186 : struct smbd_smb2_request *smb2req;
187 : struct smb_request *smbreq;
188 : files_struct *fsp;
189 : uint8_t in_flags;
190 : uint32_t in_length;
191 : uint64_t in_offset;
192 : uint32_t in_minimum;
193 : DATA_BLOB out_headers;
194 : uint8_t _out_hdr_buf[NBT_HDR_SIZE + SMB2_HDR_BODY + 0x10];
195 : DATA_BLOB out_data;
196 : uint32_t out_remaining;
197 : };
198 :
199 0 : static int smb2_smb2_read_state_deny_destructor(struct smbd_smb2_read_state *state)
200 : {
201 0 : return -1;
202 : }
203 :
204 : /* struct smbd_smb2_read_state destructor. Send the SMB2_READ data. */
205 0 : static int smb2_sendfile_send_data(struct smbd_smb2_read_state *state)
206 : {
207 0 : struct lock_struct lock;
208 0 : uint32_t in_length = state->in_length;
209 0 : uint64_t in_offset = state->in_offset;
210 0 : files_struct *fsp = state->fsp;
211 0 : const DATA_BLOB *hdr = state->smb2req->queue_entry.sendfile_header;
212 0 : NTSTATUS *pstatus = state->smb2req->queue_entry.sendfile_status;
213 0 : struct smbXsrv_connection *xconn = state->smb2req->xconn;
214 0 : ssize_t nread;
215 0 : ssize_t ret;
216 0 : int saved_errno;
217 :
218 0 : nread = SMB_VFS_SENDFILE(xconn->transport.sock,
219 : fsp,
220 : hdr,
221 : in_offset,
222 : in_length);
223 0 : DEBUG(10,("smb2_sendfile_send_data: SMB_VFS_SENDFILE returned %d on file %s\n",
224 : (int)nread,
225 : fsp_str_dbg(fsp) ));
226 :
227 0 : if (nread == -1) {
228 0 : saved_errno = errno;
229 :
230 : /*
231 : * Returning ENOSYS means no data at all was sent.
232 : Do this as a normal read. */
233 0 : if (errno == ENOSYS) {
234 0 : goto normal_read;
235 : }
236 :
237 0 : if (errno == ENOTSUP) {
238 0 : set_use_sendfile(SNUM(fsp->conn), false);
239 0 : DBG_WARNING("Disabling sendfile use as sendfile is "
240 : "not supported by the system\n");
241 0 : goto normal_read;
242 : }
243 :
244 0 : if (errno == EINTR) {
245 : /*
246 : * Special hack for broken Linux with no working sendfile. If we
247 : * return EINTR we sent the header but not the rest of the data.
248 : * Fake this up by doing read/write calls.
249 : */
250 0 : set_use_sendfile(SNUM(fsp->conn), false);
251 0 : nread = fake_sendfile(xconn, fsp, in_offset, in_length);
252 0 : if (nread == -1) {
253 0 : saved_errno = errno;
254 0 : DEBUG(0,("smb2_sendfile_send_data: fake_sendfile "
255 : "failed for file %s (%s) for client %s. "
256 : "Terminating\n",
257 : fsp_str_dbg(fsp), strerror(saved_errno),
258 : smbXsrv_connection_dbg(xconn)));
259 0 : *pstatus = map_nt_error_from_unix_common(saved_errno);
260 0 : return 0;
261 : }
262 0 : goto out;
263 : }
264 :
265 0 : DEBUG(0,("smb2_sendfile_send_data: sendfile failed for file "
266 : "%s (%s) for client %s. Terminating\n",
267 : fsp_str_dbg(fsp), strerror(saved_errno),
268 : smbXsrv_connection_dbg(xconn)));
269 0 : *pstatus = map_nt_error_from_unix_common(saved_errno);
270 0 : return 0;
271 0 : } else if (nread == 0) {
272 : /*
273 : * Some sendfile implementations return 0 to indicate
274 : * that there was a short read, but nothing was
275 : * actually written to the socket. In this case,
276 : * fallback to the normal read path so the header gets
277 : * the correct byte count.
278 : */
279 0 : DEBUG(3, ("send_file_readX: sendfile sent zero bytes "
280 : "falling back to the normal read: %s\n",
281 : fsp_str_dbg(fsp)));
282 0 : goto normal_read;
283 : }
284 :
285 : /*
286 : * We got a short read
287 : */
288 0 : goto out;
289 :
290 0 : normal_read:
291 : /* Send out the header. */
292 0 : ret = write_data(xconn->transport.sock,
293 0 : (const char *)hdr->data, hdr->length);
294 0 : if (ret != hdr->length) {
295 0 : saved_errno = errno;
296 0 : DEBUG(0,("smb2_sendfile_send_data: write_data failed for file "
297 : "%s (%s) for client %s. Terminating\n",
298 : fsp_str_dbg(fsp), strerror(saved_errno),
299 : smbXsrv_connection_dbg(xconn)));
300 0 : *pstatus = map_nt_error_from_unix_common(saved_errno);
301 0 : return 0;
302 : }
303 0 : nread = fake_sendfile(xconn, fsp, in_offset, in_length);
304 0 : if (nread == -1) {
305 0 : saved_errno = errno;
306 0 : DEBUG(0,("smb2_sendfile_send_data: fake_sendfile "
307 : "failed for file %s (%s) for client %s. "
308 : "Terminating\n",
309 : fsp_str_dbg(fsp), strerror(saved_errno),
310 : smbXsrv_connection_dbg(xconn)));
311 0 : *pstatus = map_nt_error_from_unix_common(saved_errno);
312 0 : return 0;
313 : }
314 :
315 0 : out:
316 :
317 0 : if (nread < in_length) {
318 0 : ret = sendfile_short_send(xconn, fsp, nread,
319 0 : hdr->length, in_length);
320 0 : if (ret == -1) {
321 0 : saved_errno = errno;
322 0 : DEBUG(0,("%s: sendfile_short_send "
323 : "failed for file %s (%s) for client %s. "
324 : "Terminating\n",
325 : __func__,
326 : fsp_str_dbg(fsp), strerror(saved_errno),
327 : smbXsrv_connection_dbg(xconn)));
328 0 : *pstatus = map_nt_error_from_unix_common(saved_errno);
329 0 : return 0;
330 : }
331 : }
332 :
333 0 : init_strict_lock_struct(fsp,
334 0 : fsp->op->global->open_persistent_id,
335 : in_offset,
336 : in_length,
337 : READ_LOCK,
338 : lp_posix_cifsu_locktype(fsp),
339 : &lock);
340 :
341 0 : *pstatus = NT_STATUS_OK;
342 0 : return 0;
343 : }
344 :
345 767 : static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
346 : struct smbd_smb2_read_state *state)
347 : {
348 767 : files_struct *fsp = state->fsp;
349 :
350 : /*
351 : * We cannot use sendfile if...
352 : * We were not configured to do so OR
353 : * Signing is active OR
354 : * This is a compound SMB2 operation OR
355 : * fsp is a STREAM file OR
356 : * It's not a regular file OR
357 : * Requested offset is greater than file size OR
358 : * there's not enough data in the file.
359 : * Phew :-). Luckily this means most
360 : * reads on most normal files. JRA.
361 : */
362 :
363 767 : if (!lp__use_sendfile(SNUM(fsp->conn)) ||
364 0 : smb2req->do_signing ||
365 0 : smb2req->do_encryption ||
366 0 : smbd_smb2_is_compound(smb2req) ||
367 0 : fsp_is_alternate_stream(fsp) ||
368 0 : (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) ||
369 0 : (state->in_offset >= fsp->fsp_name->st.st_ex_size) ||
370 0 : (fsp->fsp_name->st.st_ex_size < state->in_offset + state->in_length))
371 : {
372 767 : return NT_STATUS_RETRY;
373 : }
374 :
375 : /* We've already checked there's this amount of data
376 : to read. */
377 0 : state->out_data.length = state->in_length;
378 0 : state->out_remaining = 0;
379 :
380 0 : state->out_headers = data_blob_const(state->_out_hdr_buf,
381 : sizeof(state->_out_hdr_buf));
382 0 : return NT_STATUS_OK;
383 : }
384 :
385 : static void smbd_smb2_read_pipe_done(struct tevent_req *subreq);
386 :
387 : /*******************************************************************
388 : Common read complete processing function for both synchronous and
389 : asynchronous reads.
390 : *******************************************************************/
391 :
392 4971 : NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err)
393 : {
394 4971 : struct smbd_smb2_read_state *state = tevent_req_data(req,
395 : struct smbd_smb2_read_state);
396 4971 : files_struct *fsp = state->fsp;
397 :
398 4971 : if (nread < 0) {
399 0 : NTSTATUS status = map_nt_error_from_unix(err);
400 :
401 0 : DEBUG( 3,( "smb2_read_complete: file %s nread = %d. "
402 : "Error = %s (NTSTATUS %s)\n",
403 : fsp_str_dbg(fsp),
404 : (int)nread,
405 : strerror(err),
406 : nt_errstr(status)));
407 :
408 0 : return status;
409 : }
410 4971 : if (nread == 0 && state->in_length != 0) {
411 362 : DEBUG(5,("smb2_read_complete: read_file[%s] end of file\n",
412 : fsp_str_dbg(fsp)));
413 362 : return NT_STATUS_END_OF_FILE;
414 : }
415 :
416 4609 : if (nread < state->in_minimum) {
417 20 : DEBUG(5,("smb2_read_complete: read_file[%s] read less %d than "
418 : "minimum requested %u. Returning end of file\n",
419 : fsp_str_dbg(fsp),
420 : (int)nread,
421 : (unsigned int)state->in_minimum));
422 20 : return NT_STATUS_END_OF_FILE;
423 : }
424 :
425 4589 : DEBUG(3,("smbd_smb2_read: %s, file %s, length=%lu offset=%lu read=%lu\n",
426 : fsp_fnum_dbg(fsp),
427 : fsp_str_dbg(fsp),
428 : (unsigned long)state->in_length,
429 : (unsigned long)state->in_offset,
430 : (unsigned long)nread));
431 :
432 4589 : state->out_data.length = nread;
433 4589 : state->out_remaining = 0;
434 :
435 4589 : return NT_STATUS_OK;
436 : }
437 :
438 2 : static bool smbd_smb2_read_cancel(struct tevent_req *req)
439 : {
440 0 : struct smbd_smb2_read_state *state =
441 2 : tevent_req_data(req,
442 : struct smbd_smb2_read_state);
443 :
444 2 : return cancel_smb2_aio(state->smbreq);
445 : }
446 :
447 12671 : static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
448 : struct tevent_context *ev,
449 : struct smbd_smb2_request *smb2req,
450 : struct files_struct *fsp,
451 : uint8_t in_flags,
452 : uint32_t in_length,
453 : uint64_t in_offset,
454 : uint32_t in_minimum,
455 : uint32_t in_remaining)
456 : {
457 48 : NTSTATUS status;
458 12671 : struct tevent_req *req = NULL;
459 12671 : struct smbd_smb2_read_state *state = NULL;
460 12671 : struct smb_request *smbreq = NULL;
461 12671 : connection_struct *conn = smb2req->tcon->compat;
462 12671 : ssize_t nread = -1;
463 48 : struct lock_struct lock;
464 48 : int saved_errno;
465 :
466 12671 : req = tevent_req_create(mem_ctx, &state,
467 : struct smbd_smb2_read_state);
468 12671 : if (req == NULL) {
469 0 : return NULL;
470 : }
471 12671 : state->smb2req = smb2req;
472 12671 : state->in_flags = in_flags;
473 12671 : state->in_length = in_length;
474 12671 : state->in_offset = in_offset;
475 12671 : state->in_minimum = in_minimum;
476 12671 : state->out_data = data_blob_null;
477 12671 : state->out_remaining = 0;
478 :
479 12671 : DEBUG(10,("smbd_smb2_read: %s - %s\n",
480 : fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
481 :
482 12671 : smbreq = smbd_smb2_fake_smb_request(smb2req, fsp);
483 12671 : if (tevent_req_nomem(smbreq, req)) {
484 0 : return tevent_req_post(req, ev);
485 : }
486 12671 : state->smbreq = smbreq;
487 :
488 12671 : if (fsp->fsp_flags.is_directory) {
489 16 : tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
490 16 : return tevent_req_post(req, ev);
491 : }
492 :
493 12655 : state->fsp = fsp;
494 :
495 12655 : if (IS_IPC(smbreq->conn)) {
496 7480 : struct tevent_req *subreq = NULL;
497 48 : bool ok;
498 :
499 7480 : state->out_data = data_blob_talloc(state, NULL, in_length);
500 7480 : if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
501 0 : return tevent_req_post(req, ev);
502 : }
503 :
504 7480 : if (!fsp_is_np(fsp)) {
505 0 : tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
506 0 : return tevent_req_post(req, ev);
507 : }
508 :
509 7528 : subreq = np_read_send(state, ev,
510 : fsp->fake_file_handle,
511 7432 : state->out_data.data,
512 7480 : state->out_data.length);
513 7480 : if (tevent_req_nomem(subreq, req)) {
514 0 : return tevent_req_post(req, ev);
515 : }
516 7480 : tevent_req_set_callback(subreq,
517 : smbd_smb2_read_pipe_done,
518 : req);
519 :
520 : /*
521 : * Make sure we mark the fsp as having outstanding async
522 : * activity so we don't crash on shutdown close.
523 : */
524 :
525 7480 : ok = aio_add_req_to_fsp(fsp, req);
526 7480 : if (!ok) {
527 0 : tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
528 0 : return tevent_req_post(req, ev);
529 : }
530 :
531 7432 : return req;
532 : }
533 :
534 5175 : if (!CHECK_READ_SMB2(fsp)) {
535 164 : tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
536 164 : return tevent_req_post(req, ev);
537 : }
538 :
539 5011 : status = schedule_smb2_aio_read(fsp->conn,
540 : smbreq,
541 : fsp,
542 : state,
543 5011 : &state->out_data,
544 : (off_t)in_offset,
545 : (size_t)in_length);
546 :
547 5011 : if (NT_STATUS_IS_OK(status)) {
548 : /*
549 : * Doing an async read, allow this
550 : * request to be canceled
551 : */
552 4204 : tevent_req_set_cancel_fn(req, smbd_smb2_read_cancel);
553 4204 : return req;
554 : }
555 :
556 807 : if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
557 : /* Real error in setting up aio. Fail. */
558 40 : tevent_req_nterror(req, status);
559 40 : return tevent_req_post(req, ev);
560 : }
561 :
562 : /* Fallback to synchronous. */
563 :
564 767 : init_strict_lock_struct(fsp,
565 767 : fsp->op->global->open_persistent_id,
566 : in_offset,
567 : in_length,
568 : READ_LOCK,
569 : lp_posix_cifsu_locktype(fsp),
570 : &lock);
571 :
572 767 : if (!SMB_VFS_STRICT_LOCK_CHECK(conn, fsp, &lock)) {
573 0 : tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
574 0 : return tevent_req_post(req, ev);
575 : }
576 :
577 : /* Try sendfile in preference. */
578 767 : status = schedule_smb2_sendfile_read(smb2req, state);
579 767 : if (NT_STATUS_IS_OK(status)) {
580 0 : tevent_req_done(req);
581 0 : return tevent_req_post(req, ev);
582 : } else {
583 767 : if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
584 0 : tevent_req_nterror(req, status);
585 0 : return tevent_req_post(req, ev);
586 : }
587 : }
588 :
589 : /* Ok, read into memory. Allocate the out buffer. */
590 767 : state->out_data = data_blob_talloc(state, NULL, in_length);
591 767 : if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
592 0 : return tevent_req_post(req, ev);
593 : }
594 :
595 767 : nread = read_file(fsp,
596 767 : (char *)state->out_data.data,
597 : in_offset,
598 : in_length);
599 :
600 767 : saved_errno = errno;
601 :
602 767 : DEBUG(10,("smbd_smb2_read: file %s, %s, offset=%llu "
603 : "len=%llu returned %lld\n",
604 : fsp_str_dbg(fsp),
605 : fsp_fnum_dbg(fsp),
606 : (unsigned long long)in_offset,
607 : (unsigned long long)in_length,
608 : (long long)nread));
609 :
610 767 : status = smb2_read_complete(req, nread, saved_errno);
611 767 : if (!NT_STATUS_IS_OK(status)) {
612 20 : tevent_req_nterror(req, status);
613 : } else {
614 : /* Success. */
615 747 : tevent_req_done(req);
616 : }
617 767 : return tevent_req_post(req, ev);
618 : }
619 :
620 7480 : static void smbd_smb2_read_pipe_done(struct tevent_req *subreq)
621 : {
622 7480 : struct tevent_req *req = tevent_req_callback_data(subreq,
623 : struct tevent_req);
624 7480 : struct smbd_smb2_read_state *state = tevent_req_data(req,
625 : struct smbd_smb2_read_state);
626 48 : NTSTATUS status;
627 7480 : ssize_t nread = -1;
628 48 : bool is_data_outstanding;
629 :
630 7480 : status = np_read_recv(subreq, &nread, &is_data_outstanding);
631 7480 : TALLOC_FREE(subreq);
632 7480 : if (!NT_STATUS_IS_OK(status)) {
633 3 : NTSTATUS old = status;
634 3 : status = nt_status_np_pipe(old);
635 3 : tevent_req_nterror(req, status);
636 3 : return;
637 : }
638 :
639 7477 : if (nread == 0 && state->out_data.length != 0) {
640 0 : tevent_req_nterror(req, NT_STATUS_END_OF_FILE);
641 0 : return;
642 : }
643 :
644 7477 : state->out_data.length = nread;
645 7477 : state->out_remaining = 0;
646 :
647 : /*
648 : * TODO: add STATUS_BUFFER_OVERFLOW handling, once we also
649 : * handle it in SMB1 pipe_read_andx_done().
650 : */
651 :
652 7477 : tevent_req_done(req);
653 : }
654 :
655 12671 : static NTSTATUS smbd_smb2_read_recv(struct tevent_req *req,
656 : TALLOC_CTX *mem_ctx,
657 : DATA_BLOB *out_data,
658 : uint32_t *out_remaining)
659 : {
660 48 : NTSTATUS status;
661 12671 : struct smbd_smb2_read_state *state = tevent_req_data(req,
662 : struct smbd_smb2_read_state);
663 :
664 12671 : if (tevent_req_is_nterror(req, &status)) {
665 605 : tevent_req_received(req);
666 605 : return status;
667 : }
668 :
669 12066 : *out_data = state->out_data;
670 12066 : talloc_steal(mem_ctx, out_data->data);
671 12066 : *out_remaining = state->out_remaining;
672 :
673 12066 : if (state->out_headers.length > 0) {
674 0 : talloc_steal(mem_ctx, state);
675 0 : talloc_set_destructor(state, smb2_smb2_read_state_deny_destructor);
676 0 : tevent_req_received(req);
677 0 : state->smb2req->queue_entry.sendfile_header = &state->out_headers;
678 0 : state->smb2req->queue_entry.sendfile_body_size = state->in_length;
679 0 : talloc_set_destructor(state, smb2_sendfile_send_data);
680 : } else {
681 12066 : tevent_req_received(req);
682 : }
683 :
684 12066 : return NT_STATUS_OK;
685 : }
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