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 6358 : NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req)
50 : {
51 6358 : struct smbXsrv_connection *xconn = req->xconn;
52 : NTSTATUS status;
53 : const uint8_t *inbody;
54 : uint8_t in_flags;
55 : uint32_t in_length;
56 : uint64_t in_offset;
57 : uint64_t in_file_id_persistent;
58 : uint64_t in_file_id_volatile;
59 : struct files_struct *in_fsp;
60 : uint32_t in_minimum_count;
61 : uint32_t in_remaining_bytes;
62 : struct tevent_req *subreq;
63 :
64 6358 : status = smbd_smb2_request_verify_sizes(req, 0x31);
65 6358 : if (!NT_STATUS_IS_OK(status)) {
66 0 : return smbd_smb2_request_error(req, status);
67 : }
68 6358 : inbody = SMBD_SMB2_IN_BODY_PTR(req);
69 :
70 6358 : if (xconn->protocol >= PROTOCOL_SMB3_02) {
71 1792 : in_flags = CVAL(inbody, 0x03);
72 : } else {
73 4566 : in_flags = 0;
74 : }
75 6358 : in_length = IVAL(inbody, 0x04);
76 6358 : in_offset = BVAL(inbody, 0x08);
77 6358 : in_file_id_persistent = BVAL(inbody, 0x10);
78 6358 : in_file_id_volatile = BVAL(inbody, 0x18);
79 6358 : in_minimum_count = IVAL(inbody, 0x20);
80 6358 : in_remaining_bytes = IVAL(inbody, 0x28);
81 :
82 : /* check the max read size */
83 6358 : 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 6358 : status = smbd_smb2_request_verify_creditcharge(req, in_length);
91 6358 : if (!NT_STATUS_IS_OK(status)) {
92 0 : return smbd_smb2_request_error(req, status);
93 : }
94 :
95 6358 : in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
96 6358 : if (in_fsp == NULL) {
97 0 : return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
98 : }
99 :
100 6358 : 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 6358 : if (subreq == NULL) {
108 0 : return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
109 : }
110 6358 : tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
111 :
112 6358 : return smbd_smb2_request_pending_queue(req, subreq, 500);
113 : }
114 :
115 6358 : static void smbd_smb2_request_read_done(struct tevent_req *subreq)
116 : {
117 6358 : struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
118 : struct smbd_smb2_request);
119 : uint16_t body_size;
120 6358 : uint8_t body_padding = req->xconn->smb2.smbtorture.read_body_padding;
121 : DATA_BLOB outbody;
122 : DATA_BLOB outdyn;
123 : uint8_t out_data_offset;
124 6358 : DATA_BLOB out_data_buffer = data_blob_null;
125 6358 : uint32_t out_data_remaining = 0;
126 : NTSTATUS status;
127 : NTSTATUS error; /* transport error */
128 :
129 6358 : status = smbd_smb2_read_recv(subreq,
130 : req,
131 : &out_data_buffer,
132 : &out_data_remaining);
133 6358 : TALLOC_FREE(subreq);
134 6358 : if (!NT_STATUS_IS_OK(status)) {
135 3 : error = smbd_smb2_request_error(req, status);
136 3 : if (!NT_STATUS_IS_OK(error)) {
137 0 : smbd_server_connection_terminate(req->xconn,
138 : nt_errstr(error));
139 1 : return;
140 : }
141 3 : 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 6355 : body_size = 0x10 + body_padding;
149 6355 : out_data_offset = SMB2_HDR_BODY + body_size;
150 :
151 6355 : outbody = smbd_smb2_generate_outbody(req, body_size);
152 6355 : 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 6355 : SSVAL(outbody.data, 0x00, 0x10 + 1); /* struct size */
163 6355 : SCVAL(outbody.data, 0x02,
164 : out_data_offset); /* data offset */
165 6355 : SCVAL(outbody.data, 0x03, 0); /* reserved */
166 6355 : SIVAL(outbody.data, 0x04,
167 : out_data_buffer.length); /* data length */
168 6355 : SIVAL(outbody.data, 0x08,
169 : out_data_remaining); /* data remaining */
170 6355 : SIVAL(outbody.data, 0x0C, 0); /* reserved */
171 6355 : if (body_padding != 0) {
172 0 : memset(outbody.data + 0x10, 0, body_padding);
173 : }
174 :
175 6355 : outdyn = out_data_buffer;
176 :
177 6355 : error = smbd_smb2_request_done(req, outbody, &outdyn);
178 6355 : 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 : 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 : ssize_t nread;
215 : ssize_t ret;
216 : 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 0 : static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
346 : struct smbd_smb2_read_state *state)
347 : {
348 0 : 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 : * We're using a write cache OR
357 : * It's not a regular file OR
358 : * Requested offset is greater than file size OR
359 : * there's not enough data in the file.
360 : * Phew :-). Luckily this means most
361 : * reads on most normal files. JRA.
362 : */
363 :
364 0 : if (!lp__use_sendfile(SNUM(fsp->conn)) ||
365 0 : smb2req->do_signing ||
366 0 : smb2req->do_encryption ||
367 0 : smbd_smb2_is_compound(smb2req) ||
368 0 : fsp_is_alternate_stream(fsp) ||
369 0 : (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) ||
370 0 : (state->in_offset >= fsp->fsp_name->st.st_ex_size) ||
371 0 : (fsp->fsp_name->st.st_ex_size < state->in_offset + state->in_length))
372 : {
373 0 : return NT_STATUS_RETRY;
374 : }
375 :
376 : /* We've already checked there's this amount of data
377 : to read. */
378 0 : state->out_data.length = state->in_length;
379 0 : state->out_remaining = 0;
380 :
381 0 : state->out_headers = data_blob_const(state->_out_hdr_buf,
382 : sizeof(state->_out_hdr_buf));
383 0 : return NT_STATUS_OK;
384 : }
385 :
386 : static void smbd_smb2_read_pipe_done(struct tevent_req *subreq);
387 :
388 : /*******************************************************************
389 : Common read complete processing function for both synchronous and
390 : asynchronous reads.
391 : *******************************************************************/
392 :
393 349 : NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err)
394 : {
395 349 : struct smbd_smb2_read_state *state = tevent_req_data(req,
396 : struct smbd_smb2_read_state);
397 349 : files_struct *fsp = state->fsp;
398 :
399 349 : if (nread < 0) {
400 0 : NTSTATUS status = map_nt_error_from_unix(err);
401 :
402 0 : DEBUG( 3,( "smb2_read_complete: file %s nread = %d. "
403 : "Error = %s (NTSTATUS %s)\n",
404 : fsp_str_dbg(fsp),
405 : (int)nread,
406 : strerror(err),
407 : nt_errstr(status)));
408 :
409 0 : return status;
410 : }
411 349 : if (nread == 0 && state->in_length != 0) {
412 0 : DEBUG(5,("smb2_read_complete: read_file[%s] end of file\n",
413 : fsp_str_dbg(fsp)));
414 0 : return NT_STATUS_END_OF_FILE;
415 : }
416 :
417 349 : if (nread < state->in_minimum) {
418 0 : DEBUG(5,("smb2_read_complete: read_file[%s] read less %d than "
419 : "minimum requested %u. Returning end of file\n",
420 : fsp_str_dbg(fsp),
421 : (int)nread,
422 : (unsigned int)state->in_minimum));
423 0 : return NT_STATUS_END_OF_FILE;
424 : }
425 :
426 349 : DEBUG(3,("smbd_smb2_read: %s, file %s, length=%lu offset=%lu read=%lu\n",
427 : fsp_fnum_dbg(fsp),
428 : fsp_str_dbg(fsp),
429 : (unsigned long)state->in_length,
430 : (unsigned long)state->in_offset,
431 : (unsigned long)nread));
432 :
433 349 : state->out_data.length = nread;
434 349 : state->out_remaining = 0;
435 :
436 349 : return NT_STATUS_OK;
437 : }
438 :
439 0 : static bool smbd_smb2_read_cancel(struct tevent_req *req)
440 : {
441 0 : struct smbd_smb2_read_state *state =
442 0 : tevent_req_data(req,
443 : struct smbd_smb2_read_state);
444 :
445 0 : return cancel_smb2_aio(state->smbreq);
446 : }
447 :
448 6358 : static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
449 : struct tevent_context *ev,
450 : struct smbd_smb2_request *smb2req,
451 : struct files_struct *fsp,
452 : uint8_t in_flags,
453 : uint32_t in_length,
454 : uint64_t in_offset,
455 : uint32_t in_minimum,
456 : uint32_t in_remaining)
457 : {
458 : NTSTATUS status;
459 6358 : struct tevent_req *req = NULL;
460 6358 : struct smbd_smb2_read_state *state = NULL;
461 6358 : struct smb_request *smbreq = NULL;
462 6358 : connection_struct *conn = smb2req->tcon->compat;
463 6358 : ssize_t nread = -1;
464 : struct lock_struct lock;
465 : int saved_errno;
466 :
467 6358 : req = tevent_req_create(mem_ctx, &state,
468 : struct smbd_smb2_read_state);
469 6358 : if (req == NULL) {
470 0 : return NULL;
471 : }
472 6358 : state->smb2req = smb2req;
473 6358 : state->in_flags = in_flags;
474 6358 : state->in_length = in_length;
475 6358 : state->in_offset = in_offset;
476 6358 : state->in_minimum = in_minimum;
477 6358 : state->out_data = data_blob_null;
478 6358 : state->out_remaining = 0;
479 :
480 6358 : DEBUG(10,("smbd_smb2_read: %s - %s\n",
481 : fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
482 :
483 6358 : smbreq = smbd_smb2_fake_smb_request(smb2req);
484 6358 : if (tevent_req_nomem(smbreq, req)) {
485 0 : return tevent_req_post(req, ev);
486 : }
487 6358 : state->smbreq = smbreq;
488 :
489 6358 : if (fsp->fsp_flags.is_directory) {
490 0 : tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
491 0 : return tevent_req_post(req, ev);
492 : }
493 :
494 6358 : state->fsp = fsp;
495 :
496 6358 : if (IS_IPC(smbreq->conn)) {
497 6009 : struct tevent_req *subreq = NULL;
498 :
499 6009 : state->out_data = data_blob_talloc(state, NULL, in_length);
500 6009 : if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
501 0 : return tevent_req_post(req, ev);
502 : }
503 :
504 6009 : 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 10188 : subreq = np_read_send(state, ev,
510 : fsp->fake_file_handle,
511 6009 : state->out_data.data,
512 6009 : state->out_data.length);
513 6009 : if (tevent_req_nomem(subreq, req)) {
514 0 : return tevent_req_post(req, ev);
515 : }
516 6009 : tevent_req_set_callback(subreq,
517 : smbd_smb2_read_pipe_done,
518 : req);
519 6009 : return req;
520 : }
521 :
522 349 : if (!CHECK_READ_SMB2(fsp)) {
523 0 : tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
524 0 : return tevent_req_post(req, ev);
525 : }
526 :
527 690 : status = schedule_smb2_aio_read(fsp->conn,
528 : smbreq,
529 : fsp,
530 : state,
531 349 : &state->out_data,
532 : (off_t)in_offset,
533 : (size_t)in_length);
534 :
535 349 : if (NT_STATUS_IS_OK(status)) {
536 : /*
537 : * Doing an async read, allow this
538 : * request to be canceled
539 : */
540 349 : tevent_req_set_cancel_fn(req, smbd_smb2_read_cancel);
541 349 : return req;
542 : }
543 :
544 0 : if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
545 : /* Real error in setting up aio. Fail. */
546 0 : tevent_req_nterror(req, status);
547 0 : return tevent_req_post(req, ev);
548 : }
549 :
550 : /* Fallback to synchronous. */
551 :
552 0 : init_strict_lock_struct(fsp,
553 0 : fsp->op->global->open_persistent_id,
554 : in_offset,
555 : in_length,
556 : READ_LOCK,
557 : lp_posix_cifsu_locktype(fsp),
558 : &lock);
559 :
560 0 : if (!SMB_VFS_STRICT_LOCK_CHECK(conn, fsp, &lock)) {
561 0 : tevent_req_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
562 0 : return tevent_req_post(req, ev);
563 : }
564 :
565 : /* Try sendfile in preference. */
566 0 : status = schedule_smb2_sendfile_read(smb2req, state);
567 0 : if (NT_STATUS_IS_OK(status)) {
568 0 : tevent_req_done(req);
569 0 : return tevent_req_post(req, ev);
570 : } else {
571 0 : if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
572 0 : tevent_req_nterror(req, status);
573 0 : return tevent_req_post(req, ev);
574 : }
575 : }
576 :
577 : /* Ok, read into memory. Allocate the out buffer. */
578 0 : state->out_data = data_blob_talloc(state, NULL, in_length);
579 0 : if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
580 0 : return tevent_req_post(req, ev);
581 : }
582 :
583 0 : nread = read_file(fsp,
584 0 : (char *)state->out_data.data,
585 : in_offset,
586 : in_length);
587 :
588 0 : saved_errno = errno;
589 :
590 0 : DEBUG(10,("smbd_smb2_read: file %s, %s, offset=%llu "
591 : "len=%llu returned %lld\n",
592 : fsp_str_dbg(fsp),
593 : fsp_fnum_dbg(fsp),
594 : (unsigned long long)in_offset,
595 : (unsigned long long)in_length,
596 : (long long)nread));
597 :
598 0 : status = smb2_read_complete(req, nread, saved_errno);
599 0 : if (!NT_STATUS_IS_OK(status)) {
600 0 : tevent_req_nterror(req, status);
601 : } else {
602 : /* Success. */
603 0 : tevent_req_done(req);
604 : }
605 0 : return tevent_req_post(req, ev);
606 : }
607 :
608 6009 : static void smbd_smb2_read_pipe_done(struct tevent_req *subreq)
609 : {
610 6009 : struct tevent_req *req = tevent_req_callback_data(subreq,
611 : struct tevent_req);
612 6009 : struct smbd_smb2_read_state *state = tevent_req_data(req,
613 : struct smbd_smb2_read_state);
614 : NTSTATUS status;
615 6009 : ssize_t nread = -1;
616 : bool is_data_outstanding;
617 :
618 6009 : status = np_read_recv(subreq, &nread, &is_data_outstanding);
619 6009 : TALLOC_FREE(subreq);
620 6009 : if (!NT_STATUS_IS_OK(status)) {
621 3 : NTSTATUS old = status;
622 3 : status = nt_status_np_pipe(old);
623 3 : tevent_req_nterror(req, status);
624 3 : return;
625 : }
626 :
627 6006 : if (nread == 0 && state->out_data.length != 0) {
628 0 : tevent_req_nterror(req, NT_STATUS_END_OF_FILE);
629 0 : return;
630 : }
631 :
632 6006 : state->out_data.length = nread;
633 6006 : state->out_remaining = 0;
634 :
635 : /*
636 : * TODO: add STATUS_BUFFER_OVERFLOW handling, once we also
637 : * handle it in SMB1 pipe_read_andx_done().
638 : */
639 :
640 6006 : tevent_req_done(req);
641 : }
642 :
643 6358 : static NTSTATUS smbd_smb2_read_recv(struct tevent_req *req,
644 : TALLOC_CTX *mem_ctx,
645 : DATA_BLOB *out_data,
646 : uint32_t *out_remaining)
647 : {
648 : NTSTATUS status;
649 6358 : struct smbd_smb2_read_state *state = tevent_req_data(req,
650 : struct smbd_smb2_read_state);
651 :
652 6358 : if (tevent_req_is_nterror(req, &status)) {
653 3 : tevent_req_received(req);
654 3 : return status;
655 : }
656 :
657 6355 : *out_data = state->out_data;
658 6355 : talloc_steal(mem_ctx, out_data->data);
659 6355 : *out_remaining = state->out_remaining;
660 :
661 6355 : if (state->out_headers.length > 0) {
662 0 : talloc_steal(mem_ctx, state);
663 0 : talloc_set_destructor(state, smb2_smb2_read_state_deny_destructor);
664 0 : tevent_req_received(req);
665 0 : state->smb2req->queue_entry.sendfile_header = &state->out_headers;
666 0 : state->smb2req->queue_entry.sendfile_body_size = state->in_length;
667 0 : talloc_set_destructor(state, smb2_sendfile_send_data);
668 : } else {
669 6355 : tevent_req_received(req);
670 : }
671 :
672 6355 : return NT_STATUS_OK;
673 : }
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