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dsdb-tests: Add new test samba4.user_account_control.python
[Samba.git] / source3 / smbd / aio.c
blobe2306a98288dad0f93ee8471421b7590f44dcb5f
1 /*
2 Unix SMB/Netbios implementation.
3 Version 3.0
4 async_io read handling using POSIX async io.
5 Copyright (C) Jeremy Allison 2005.
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 "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/tevent_wait.h"
27
28 /****************************************************************************
29 The buffer we keep around whilst an aio request is in process.
30 *****************************************************************************/
31
32 struct aio_extra {
33 files_struct *fsp;
34 struct smb_request *smbreq;
35 DATA_BLOB outbuf;
36 struct lock_struct lock;
37 size_t nbyte;
38 off_t offset;
39 bool write_through;
40 };
41
42 /****************************************************************************
43 Accessor function to return write_through state.
44 *****************************************************************************/
45
46 bool aio_write_through_requested(struct aio_extra *aio_ex)
47 {
48 return aio_ex->write_through;
49 }
50
51 static int aio_extra_destructor(struct aio_extra *aio_ex)
52 {
53 outstanding_aio_calls--;
54 return 0;
55 }
56
57 /****************************************************************************
58 Create the extended aio struct we must keep around for the lifetime
59 of the aio call.
60 *****************************************************************************/
61
62 static struct aio_extra *create_aio_extra(TALLOC_CTX *mem_ctx,
63 files_struct *fsp,
64 size_t buflen)
65 {
66 struct aio_extra *aio_ex = talloc_zero(mem_ctx, struct aio_extra);
67
68 if (!aio_ex) {
69 return NULL;
70 }
71
72 /* The output buffer stored in the aio_ex is the start of
73 the smb return buffer. The buffer used in the acb
74 is the start of the reply data portion of that buffer. */
75
76 if (buflen) {
77 aio_ex->outbuf = data_blob_talloc(aio_ex, NULL, buflen);
78 if (!aio_ex->outbuf.data) {
79 TALLOC_FREE(aio_ex);
80 return NULL;
81 }
82 }
83 talloc_set_destructor(aio_ex, aio_extra_destructor);
84 aio_ex->fsp = fsp;
85 outstanding_aio_calls++;
86 return aio_ex;
87 }
88
89 struct aio_req_fsp_link {
90 files_struct *fsp;
91 struct tevent_req *req;
92 };
93
94 static int aio_del_req_from_fsp(struct aio_req_fsp_link *lnk)
95 {
96 unsigned i;
97 files_struct *fsp = lnk->fsp;
98 struct tevent_req *req = lnk->req;
99
100 for (i=0; i<fsp->num_aio_requests; i++) {
101 if (fsp->aio_requests[i] == req) {
102 break;
103 }
104 }
105 if (i == fsp->num_aio_requests) {
106 DEBUG(1, ("req %p not found in fsp %p\n", req, fsp));
107 return 0;
108 }
109 fsp->num_aio_requests -= 1;
110 fsp->aio_requests[i] = fsp->aio_requests[fsp->num_aio_requests];
111
112 if (fsp->num_aio_requests == 0) {
113 tevent_wait_done(fsp->deferred_close);
114 }
115 return 0;
116 }
117
118 bool aio_add_req_to_fsp(files_struct *fsp, struct tevent_req *req)
119 {
120 size_t array_len;
121 struct aio_req_fsp_link *lnk;
122
123 lnk = talloc(req, struct aio_req_fsp_link);
124 if (lnk == NULL) {
125 return false;
126 }
127
128 array_len = talloc_array_length(fsp->aio_requests);
129 if (array_len <= fsp->num_aio_requests) {
130 struct tevent_req **tmp;
131
132 tmp = talloc_realloc(
133 fsp, fsp->aio_requests, struct tevent_req *,
134 fsp->num_aio_requests+1);
135 if (tmp == NULL) {
136 TALLOC_FREE(lnk);
137 return false;
138 }
139 fsp->aio_requests = tmp;
140 }
141 fsp->aio_requests[fsp->num_aio_requests] = req;
142 fsp->num_aio_requests += 1;
143
144 lnk->fsp = fsp;
145 lnk->req = req;
146 talloc_set_destructor(lnk, aio_del_req_from_fsp);
147
148 return true;
149 }
150
151 static void aio_pread_smb1_done(struct tevent_req *req);
152
153 /****************************************************************************
154 Set up an aio request from a SMBreadX call.
155 *****************************************************************************/
156
157 NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
158 struct smb_request *smbreq,
159 files_struct *fsp, off_t startpos,
160 size_t smb_maxcnt)
161 {
162 struct aio_extra *aio_ex;
163 size_t bufsize;
164 size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
165 struct tevent_req *req;
166
167 if (fsp->base_fsp != NULL) {
168 /* No AIO on streams yet */
169 DEBUG(10, ("AIO on streams not yet supported\n"));
170 return NT_STATUS_RETRY;
171 }
172
173 if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
174 && !SMB_VFS_AIO_FORCE(fsp)) {
175 /* Too small a read for aio request. */
176 DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
177 "for minimum aio_read of %u\n",
178 (unsigned int)smb_maxcnt,
179 (unsigned int)min_aio_read_size ));
180 return NT_STATUS_RETRY;
181 }
182
183 /* Only do this on non-chained and non-chaining reads not using the
184 * write cache. */
185 if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
186 return NT_STATUS_RETRY;
187 }
188
189 if (outstanding_aio_calls >= aio_pending_size) {
190 DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
191 "activities outstanding.\n",
192 outstanding_aio_calls ));
193 return NT_STATUS_RETRY;
194 }
195
196 /* The following is safe from integer wrap as we've already checked
197 smb_maxcnt is 128k or less. Wct is 12 for read replies */
198
199 bufsize = smb_size + 12 * 2 + smb_maxcnt + 1 /* padding byte */;
200
201 if ((aio_ex = create_aio_extra(NULL, fsp, bufsize)) == NULL) {
202 DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
203 return NT_STATUS_NO_MEMORY;
204 }
205
206 construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
207 srv_set_message((char *)aio_ex->outbuf.data, 12, 0, True);
208 SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
209 SCVAL(smb_buf(aio_ex->outbuf.data), 0, 0); /* padding byte */
210
211 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
212 (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
213 &aio_ex->lock);
214
215 /* Take the lock until the AIO completes. */
216 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
217 TALLOC_FREE(aio_ex);
218 return NT_STATUS_FILE_LOCK_CONFLICT;
219 }
220
221 aio_ex->nbyte = smb_maxcnt;
222 aio_ex->offset = startpos;
223
224 req = SMB_VFS_PREAD_SEND(aio_ex, fsp->conn->sconn->ev_ctx,
225 fsp,
226 smb_buf(aio_ex->outbuf.data) + 1 /* pad */,
227 smb_maxcnt, startpos);
228 if (req == NULL) {
229 DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
230 "Error %s\n", strerror(errno) ));
231 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
232 TALLOC_FREE(aio_ex);
233 return NT_STATUS_RETRY;
234 }
235 tevent_req_set_callback(req, aio_pread_smb1_done, aio_ex);
236
237 if (!aio_add_req_to_fsp(fsp, req)) {
238 DEBUG(1, ("Could not add req to fsp\n"));
239 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
240 TALLOC_FREE(aio_ex);
241 return NT_STATUS_RETRY;
242 }
243
244 aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
245
246 DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
247 "offset %.0f, len = %u (mid = %u)\n",
248 fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
249 (unsigned int)aio_ex->smbreq->mid ));
250
251 return NT_STATUS_OK;
252 }
253
254 static void aio_pread_smb1_done(struct tevent_req *req)
255 {
256 struct aio_extra *aio_ex = tevent_req_callback_data(
257 req, struct aio_extra);
258 files_struct *fsp = aio_ex->fsp;
259 int outsize;
260 char *outbuf = (char *)aio_ex->outbuf.data;
261 char *data = smb_buf(outbuf) + 1 /* padding byte */;
262 ssize_t nread;
263 int err;
264
265 nread = SMB_VFS_PREAD_RECV(req, &err);
266 TALLOC_FREE(req);
267
268 DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
269 (nread == -1) ? strerror(err) : "no error"));
270
271 if (fsp == NULL) {
272 DEBUG( 3, ("aio_pread_smb1_done: file closed whilst "
273 "aio outstanding (mid[%llu]).\n",
274 (unsigned long long)aio_ex->smbreq->mid));
275 TALLOC_FREE(aio_ex);
276 return;
277 }
278
279 /* Unlock now we're done. */
280 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
281
282 if (nread < 0) {
283 DEBUG( 3, ("handle_aio_read_complete: file %s nread == %d. "
284 "Error = %s\n", fsp_str_dbg(fsp), (int)nread,
285 strerror(err)));
286
287 ERROR_NT(map_nt_error_from_unix(err));
288 outsize = srv_set_message(outbuf,0,0,true);
289 } else {
290 outsize = srv_set_message(outbuf, 12,
291 nread + 1 /* padding byte */, false);
292 SSVAL(outbuf,smb_vwv2, 0xFFFF); /* Remaining - must be * -1. */
293 SSVAL(outbuf,smb_vwv5, nread);
294 SSVAL(outbuf,smb_vwv6, smb_offset(data,outbuf));
295 SSVAL(outbuf,smb_vwv7, ((nread >> 16) & 1));
296 SSVAL(smb_buf(outbuf), -2, nread);
297
298 aio_ex->fsp->fh->pos = aio_ex->offset + nread;
299 aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
300
301 DEBUG( 3, ("handle_aio_read_complete file %s max=%d "
302 "nread=%d\n", fsp_str_dbg(fsp),
303 (int)aio_ex->nbyte, (int)nread ) );
304
305 }
306 smb_setlen(outbuf, outsize - 4);
307 show_msg(outbuf);
308 if (!srv_send_smb(aio_ex->smbreq->xconn, outbuf,
309 true, aio_ex->smbreq->seqnum+1,
310 IS_CONN_ENCRYPTED(fsp->conn), NULL)) {
311 exit_server_cleanly("handle_aio_read_complete: srv_send_smb "
312 "failed.");
313 }
314
315 DEBUG(10, ("handle_aio_read_complete: scheduled aio_read completed "
316 "for file %s, offset %.0f, len = %u\n",
317 fsp_str_dbg(fsp), (double)aio_ex->offset,
318 (unsigned int)nread));
319
320 TALLOC_FREE(aio_ex);
321 }
322
323 struct pwrite_fsync_state {
324 struct tevent_context *ev;
325 files_struct *fsp;
326 bool write_through;
327 ssize_t nwritten;
328 };
329
330 static void pwrite_fsync_write_done(struct tevent_req *subreq);
331 static void pwrite_fsync_sync_done(struct tevent_req *subreq);
332
333 static struct tevent_req *pwrite_fsync_send(TALLOC_CTX *mem_ctx,
334 struct tevent_context *ev,
335 struct files_struct *fsp,
336 const void *data,
337 size_t n, off_t offset,
338 bool write_through)
339 {
340 struct tevent_req *req, *subreq;
341 struct pwrite_fsync_state *state;
342
343 req = tevent_req_create(mem_ctx, &state, struct pwrite_fsync_state);
344 if (req == NULL) {
345 return NULL;
346 }
347 state->ev = ev;
348 state->fsp = fsp;
349 state->write_through = write_through;
350
351 subreq = SMB_VFS_PWRITE_SEND(state, ev, fsp, data, n, offset);
352 if (tevent_req_nomem(subreq, req)) {
353 return tevent_req_post(req, ev);
354 }
355 tevent_req_set_callback(subreq, pwrite_fsync_write_done, req);
356 return req;
357 }
358
359 static void pwrite_fsync_write_done(struct tevent_req *subreq)
360 {
361 struct tevent_req *req = tevent_req_callback_data(
362 subreq, struct tevent_req);
363 struct pwrite_fsync_state *state = tevent_req_data(
364 req, struct pwrite_fsync_state);
365 connection_struct *conn = state->fsp->conn;
366 int err;
367 bool do_sync;
368
369 state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &err);
370 TALLOC_FREE(subreq);
371 if (state->nwritten == -1) {
372 tevent_req_error(req, err);
373 return;
374 }
375
376 do_sync = (lp_strict_sync(SNUM(conn)) &&
377 (lp_sync_always(SNUM(conn)) || state->write_through));
378 if (!do_sync) {
379 tevent_req_done(req);
380 return;
381 }
382
383 subreq = SMB_VFS_FSYNC_SEND(state, state->ev, state->fsp);
384 if (tevent_req_nomem(subreq, req)) {
385 return;
386 }
387 tevent_req_set_callback(subreq, pwrite_fsync_sync_done, req);
388 }
389
390 static void pwrite_fsync_sync_done(struct tevent_req *subreq)
391 {
392 struct tevent_req *req = tevent_req_callback_data(
393 subreq, struct tevent_req);
394 int ret, err;
395
396 ret = SMB_VFS_FSYNC_RECV(subreq, &err);
397 TALLOC_FREE(subreq);
398 if (ret == -1) {
399 tevent_req_error(req, err);
400 return;
401 }
402 tevent_req_done(req);
403 }
404
405 static ssize_t pwrite_fsync_recv(struct tevent_req *req, int *perr)
406 {
407 struct pwrite_fsync_state *state = tevent_req_data(
408 req, struct pwrite_fsync_state);
409
410 if (tevent_req_is_unix_error(req, perr)) {
411 return -1;
412 }
413 return state->nwritten;
414 }
415
416 static void aio_pwrite_smb1_done(struct tevent_req *req);
417
418 /****************************************************************************
419 Set up an aio request from a SMBwriteX call.
420 *****************************************************************************/
421
422 NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
423 struct smb_request *smbreq,
424 files_struct *fsp, const char *data,
425 off_t startpos,
426 size_t numtowrite)
427 {
428 struct aio_extra *aio_ex;
429 size_t bufsize;
430 size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
431 struct tevent_req *req;
432
433 if (fsp->base_fsp != NULL) {
434 /* No AIO on streams yet */
435 DEBUG(10, ("AIO on streams not yet supported\n"));
436 return NT_STATUS_RETRY;
437 }
438
439 if ((!min_aio_write_size || (numtowrite < min_aio_write_size))
440 && !SMB_VFS_AIO_FORCE(fsp)) {
441 /* Too small a write for aio request. */
442 DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
443 "small for minimum aio_write of %u\n",
444 (unsigned int)numtowrite,
445 (unsigned int)min_aio_write_size ));
446 return NT_STATUS_RETRY;
447 }
448
449 /* Only do this on non-chained and non-chaining writes not using the
450 * write cache. */
451 if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
452 return NT_STATUS_RETRY;
453 }
454
455 if (outstanding_aio_calls >= aio_pending_size) {
456 DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
457 "activities outstanding.\n",
458 outstanding_aio_calls ));
459 DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
460 "aio_write for file %s, offset %.0f, len = %u "
461 "(mid = %u)\n",
462 fsp_str_dbg(fsp), (double)startpos,
463 (unsigned int)numtowrite,
464 (unsigned int)smbreq->mid ));
465 return NT_STATUS_RETRY;
466 }
467
468 bufsize = smb_size + 6*2;
469
470 if (!(aio_ex = create_aio_extra(NULL, fsp, bufsize))) {
471 DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
472 return NT_STATUS_NO_MEMORY;
473 }
474 aio_ex->write_through = BITSETW(smbreq->vwv+7,0);
475
476 construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
477 srv_set_message((char *)aio_ex->outbuf.data, 6, 0, True);
478 SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
479
480 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
481 (uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
482 &aio_ex->lock);
483
484 /* Take the lock until the AIO completes. */
485 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
486 TALLOC_FREE(aio_ex);
487 return NT_STATUS_FILE_LOCK_CONFLICT;
488 }
489
490 aio_ex->nbyte = numtowrite;
491 aio_ex->offset = startpos;
492
493 req = pwrite_fsync_send(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
494 data, numtowrite, startpos,
495 aio_ex->write_through);
496 if (req == NULL) {
497 DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
498 "Error %s\n", strerror(errno) ));
499 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
500 TALLOC_FREE(aio_ex);
501 return NT_STATUS_RETRY;
502 }
503 tevent_req_set_callback(req, aio_pwrite_smb1_done, aio_ex);
504
505 if (!aio_add_req_to_fsp(fsp, req)) {
506 DEBUG(1, ("Could not add req to fsp\n"));
507 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
508 TALLOC_FREE(aio_ex);
509 return NT_STATUS_RETRY;
510 }
511
512 aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
513
514 /* This should actually be improved to span the write. */
515 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
516 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
517
518 if (!aio_ex->write_through && !lp_sync_always(SNUM(fsp->conn))
519 && fsp->aio_write_behind) {
520 /* Lie to the client and immediately claim we finished the
521 * write. */
522 SSVAL(aio_ex->outbuf.data,smb_vwv2,numtowrite);
523 SSVAL(aio_ex->outbuf.data,smb_vwv4,(numtowrite>>16)&1);
524 show_msg((char *)aio_ex->outbuf.data);
525 if (!srv_send_smb(aio_ex->smbreq->xconn,
526 (char *)aio_ex->outbuf.data,
527 true, aio_ex->smbreq->seqnum+1,
528 IS_CONN_ENCRYPTED(fsp->conn),
529 &aio_ex->smbreq->pcd)) {
530 exit_server_cleanly("schedule_aio_write_and_X: "
531 "srv_send_smb failed.");
532 }
533 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
534 "behind for file %s\n", fsp_str_dbg(fsp)));
535 }
536
537 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write for file "
538 "%s, offset %.0f, len = %u (mid = %u) "
539 "outstanding_aio_calls = %d\n",
540 fsp_str_dbg(fsp), (double)startpos, (unsigned int)numtowrite,
541 (unsigned int)aio_ex->smbreq->mid, outstanding_aio_calls ));
542
543 return NT_STATUS_OK;
544 }
545
546 static void aio_pwrite_smb1_done(struct tevent_req *req)
547 {
548 struct aio_extra *aio_ex = tevent_req_callback_data(
549 req, struct aio_extra);
550 files_struct *fsp = aio_ex->fsp;
551 char *outbuf = (char *)aio_ex->outbuf.data;
552 ssize_t numtowrite = aio_ex->nbyte;
553 ssize_t nwritten;
554 int err;
555
556 nwritten = pwrite_fsync_recv(req, &err);
557 TALLOC_FREE(req);
558
559 DEBUG(10, ("pwrite_recv returned %d, err = %s\n", (int)nwritten,
560 (nwritten == -1) ? strerror(err) : "no error"));
561
562 if (fsp == NULL) {
563 DEBUG( 3, ("aio_pwrite_smb1_done: file closed whilst "
564 "aio outstanding (mid[%llu]).\n",
565 (unsigned long long)aio_ex->smbreq->mid));
566 TALLOC_FREE(aio_ex);
567 return;
568 }
569
570 /* Unlock now we're done. */
571 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
572
573 mark_file_modified(fsp);
574
575 if (fsp->aio_write_behind) {
576
577 if (nwritten != numtowrite) {
578 if (nwritten == -1) {
579 DEBUG(5,("handle_aio_write_complete: "
580 "aio_write_behind failed ! File %s "
581 "is corrupt ! Error %s\n",
582 fsp_str_dbg(fsp), strerror(err)));
583 } else {
584 DEBUG(0,("handle_aio_write_complete: "
585 "aio_write_behind failed ! File %s "
586 "is corrupt ! Wanted %u bytes but "
587 "only wrote %d\n", fsp_str_dbg(fsp),
588 (unsigned int)numtowrite,
589 (int)nwritten ));
590 }
591 } else {
592 DEBUG(10,("handle_aio_write_complete: "
593 "aio_write_behind completed for file %s\n",
594 fsp_str_dbg(fsp)));
595 }
596 /* TODO: should no return success in case of an error !!! */
597 TALLOC_FREE(aio_ex);
598 return;
599 }
600
601 /* We don't need outsize or set_message here as we've already set the
602 fixed size length when we set up the aio call. */
603
604 if (nwritten == -1) {
605 DEBUG(3, ("handle_aio_write: file %s wanted %u bytes. "
606 "nwritten == %d. Error = %s\n",
607 fsp_str_dbg(fsp), (unsigned int)numtowrite,
608 (int)nwritten, strerror(err)));
609
610 ERROR_NT(map_nt_error_from_unix(err));
611 srv_set_message(outbuf,0,0,true);
612 } else {
613 SSVAL(outbuf,smb_vwv2,nwritten);
614 SSVAL(outbuf,smb_vwv4,(nwritten>>16)&1);
615 if (nwritten < (ssize_t)numtowrite) {
616 SCVAL(outbuf,smb_rcls,ERRHRD);
617 SSVAL(outbuf,smb_err,ERRdiskfull);
618 }
619
620 DEBUG(3,("handle_aio_write: %s, num=%d wrote=%d\n",
621 fsp_fnum_dbg(fsp), (int)numtowrite, (int)nwritten));
622
623 aio_ex->fsp->fh->pos = aio_ex->offset + nwritten;
624 }
625
626 show_msg(outbuf);
627 if (!srv_send_smb(aio_ex->smbreq->xconn, outbuf,
628 true, aio_ex->smbreq->seqnum+1,
629 IS_CONN_ENCRYPTED(fsp->conn),
630 NULL)) {
631 exit_server_cleanly("handle_aio_write_complete: "
632 "srv_send_smb failed.");
633 }
634
635 DEBUG(10, ("handle_aio_write_complete: scheduled aio_write completed "
636 "for file %s, offset %.0f, requested %u, written = %u\n",
637 fsp_str_dbg(fsp), (double)aio_ex->offset,
638 (unsigned int)numtowrite, (unsigned int)nwritten));
639
640 TALLOC_FREE(aio_ex);
641 }
642
643 bool cancel_smb2_aio(struct smb_request *smbreq)
644 {
645 struct smbd_smb2_request *smb2req = smbreq->smb2req;
646 struct aio_extra *aio_ex = NULL;
647
648 if (smb2req) {
649 aio_ex = talloc_get_type(smbreq->async_priv,
650 struct aio_extra);
651 }
652
653 if (aio_ex == NULL) {
654 return false;
655 }
656
657 if (aio_ex->fsp == NULL) {
658 return false;
659 }
660
661 /*
662 * We let the aio request run. Setting fsp to NULL has the
663 * effect that the _done routines don't send anything out.
664 */
665
666 aio_ex->fsp = NULL;
667 return true;
668 }
669
670 static void aio_pread_smb2_done(struct tevent_req *req);
671
672 /****************************************************************************
673 Set up an aio request from a SMB2 read call.
674 *****************************************************************************/
675
676 NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
677 struct smb_request *smbreq,
678 files_struct *fsp,
679 TALLOC_CTX *ctx,
680 DATA_BLOB *preadbuf,
681 off_t startpos,
682 size_t smb_maxcnt)
683 {
684 struct aio_extra *aio_ex;
685 size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
686 struct tevent_req *req;
687
688 if (fsp->base_fsp != NULL) {
689 /* No AIO on streams yet */
690 DEBUG(10, ("AIO on streams not yet supported\n"));
691 return NT_STATUS_RETRY;
692 }
693
694 if (fsp->op == NULL) {
695 /* No AIO on internal opens. */
696 return NT_STATUS_RETRY;
697 }
698
699 if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
700 && !SMB_VFS_AIO_FORCE(fsp)) {
701 /* Too small a read for aio request. */
702 DEBUG(10,("smb2: read size (%u) too small "
703 "for minimum aio_read of %u\n",
704 (unsigned int)smb_maxcnt,
705 (unsigned int)min_aio_read_size ));
706 return NT_STATUS_RETRY;
707 }
708
709 /* Only do this on reads not using the write cache. */
710 if (lp_write_cache_size(SNUM(conn)) != 0) {
711 return NT_STATUS_RETRY;
712 }
713
714 if (outstanding_aio_calls >= aio_pending_size) {
715 DEBUG(10,("smb2: Already have %d aio "
716 "activities outstanding.\n",
717 outstanding_aio_calls ));
718 return NT_STATUS_RETRY;
719 }
720
721 /* Create the out buffer. */
722 *preadbuf = data_blob_talloc(ctx, NULL, smb_maxcnt);
723 if (preadbuf->data == NULL) {
724 return NT_STATUS_NO_MEMORY;
725 }
726
727 if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
728 return NT_STATUS_NO_MEMORY;
729 }
730
731 init_strict_lock_struct(fsp, fsp->op->global->open_persistent_id,
732 (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
733 &aio_ex->lock);
734
735 /* Take the lock until the AIO completes. */
736 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
737 TALLOC_FREE(aio_ex);
738 return NT_STATUS_FILE_LOCK_CONFLICT;
739 }
740
741 aio_ex->nbyte = smb_maxcnt;
742 aio_ex->offset = startpos;
743
744 req = SMB_VFS_PREAD_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
745 preadbuf->data, smb_maxcnt, startpos);
746 if (req == NULL) {
747 DEBUG(0, ("smb2: SMB_VFS_PREAD_SEND failed. "
748 "Error %s\n", strerror(errno)));
749 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
750 TALLOC_FREE(aio_ex);
751 return NT_STATUS_RETRY;
752 }
753 tevent_req_set_callback(req, aio_pread_smb2_done, aio_ex);
754
755 if (!aio_add_req_to_fsp(fsp, req)) {
756 DEBUG(1, ("Could not add req to fsp\n"));
757 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
758 TALLOC_FREE(aio_ex);
759 return NT_STATUS_RETRY;
760 }
761
762 /* We don't need talloc_move here as both aio_ex and
763 * smbreq are children of smbreq->smb2req. */
764 aio_ex->smbreq = smbreq;
765 smbreq->async_priv = aio_ex;
766
767 DEBUG(10,("smb2: scheduled aio_read for file %s, "
768 "offset %.0f, len = %u (mid = %u)\n",
769 fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
770 (unsigned int)aio_ex->smbreq->mid ));
771
772 return NT_STATUS_OK;
773 }
774
775 static void aio_pread_smb2_done(struct tevent_req *req)
776 {
777 struct aio_extra *aio_ex = tevent_req_callback_data(
778 req, struct aio_extra);
779 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
780 files_struct *fsp = aio_ex->fsp;
781 NTSTATUS status;
782 ssize_t nread;
783 int err = 0;
784
785 nread = SMB_VFS_PREAD_RECV(req, &err);
786 TALLOC_FREE(req);
787
788 DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
789 (nread == -1) ? strerror(err) : "no error"));
790
791 if (fsp == NULL) {
792 DEBUG( 3, ("aio_pread_smb2_done: file closed whilst "
793 "aio outstanding (mid[%llu]).\n",
794 (unsigned long long)aio_ex->smbreq->mid));
795 TALLOC_FREE(aio_ex);
796 return;
797 }
798
799 /* Unlock now we're done. */
800 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
801
802 /* Common error or success code processing for async or sync
803 read returns. */
804
805 status = smb2_read_complete(subreq, nread, err);
806
807 if (nread > 0) {
808 fsp->fh->pos = aio_ex->offset + nread;
809 fsp->fh->position_information = fsp->fh->pos;
810 }
811
812 DEBUG(10, ("smb2: scheduled aio_read completed "
813 "for file %s, offset %.0f, len = %u "
814 "(errcode = %d, NTSTATUS = %s)\n",
815 fsp_str_dbg(aio_ex->fsp),
816 (double)aio_ex->offset,
817 (unsigned int)nread,
818 err, nt_errstr(status)));
819
820 if (!NT_STATUS_IS_OK(status)) {
821 tevent_req_nterror(subreq, status);
822 return;
823 }
824 tevent_req_done(subreq);
825 }
826
827 static void aio_pwrite_smb2_done(struct tevent_req *req);
828
829 /****************************************************************************
830 Set up an aio request from a SMB2write call.
831 *****************************************************************************/
832
833 NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
834 struct smb_request *smbreq,
835 files_struct *fsp,
836 uint64_t in_offset,
837 DATA_BLOB in_data,
838 bool write_through)
839 {
840 struct aio_extra *aio_ex = NULL;
841 size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
842 struct tevent_req *req;
843
844 if (fsp->base_fsp != NULL) {
845 /* No AIO on streams yet */
846 DEBUG(10, ("AIO on streams not yet supported\n"));
847 return NT_STATUS_RETRY;
848 }
849
850 if (fsp->op == NULL) {
851 /* No AIO on internal opens. */
852 return NT_STATUS_RETRY;
853 }
854
855 if ((!min_aio_write_size || (in_data.length < min_aio_write_size))
856 && !SMB_VFS_AIO_FORCE(fsp)) {
857 /* Too small a write for aio request. */
858 DEBUG(10,("smb2: write size (%u) too "
859 "small for minimum aio_write of %u\n",
860 (unsigned int)in_data.length,
861 (unsigned int)min_aio_write_size ));
862 return NT_STATUS_RETRY;
863 }
864
865 /* Only do this on writes not using the write cache. */
866 if (lp_write_cache_size(SNUM(conn)) != 0) {
867 return NT_STATUS_RETRY;
868 }
869
870 if (outstanding_aio_calls >= aio_pending_size) {
871 DEBUG(3,("smb2: Already have %d aio "
872 "activities outstanding.\n",
873 outstanding_aio_calls ));
874 return NT_STATUS_RETRY;
875 }
876
877 if (smbreq->unread_bytes) {
878 /* Can't do async with recvfile. */
879 return NT_STATUS_RETRY;
880 }
881
882 if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
883 return NT_STATUS_NO_MEMORY;
884 }
885
886 aio_ex->write_through = write_through;
887
888 init_strict_lock_struct(fsp, fsp->op->global->open_persistent_id,
889 in_offset, (uint64_t)in_data.length, WRITE_LOCK,
890 &aio_ex->lock);
891
892 /* Take the lock until the AIO completes. */
893 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
894 TALLOC_FREE(aio_ex);
895 return NT_STATUS_FILE_LOCK_CONFLICT;
896 }
897
898 aio_ex->nbyte = in_data.length;
899 aio_ex->offset = in_offset;
900
901 req = pwrite_fsync_send(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
902 in_data.data, in_data.length, in_offset,
903 write_through);
904 if (req == NULL) {
905 DEBUG(3, ("smb2: SMB_VFS_PWRITE_SEND failed. "
906 "Error %s\n", strerror(errno)));
907 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
908 TALLOC_FREE(aio_ex);
909 return NT_STATUS_RETRY;
910 }
911 tevent_req_set_callback(req, aio_pwrite_smb2_done, aio_ex);
912
913 if (!aio_add_req_to_fsp(fsp, req)) {
914 DEBUG(1, ("Could not add req to fsp\n"));
915 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
916 TALLOC_FREE(aio_ex);
917 return NT_STATUS_RETRY;
918 }
919
920 /* We don't need talloc_move here as both aio_ex and
921 * smbreq are children of smbreq->smb2req. */
922 aio_ex->smbreq = smbreq;
923 smbreq->async_priv = aio_ex;
924
925 /* This should actually be improved to span the write. */
926 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
927 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
928
929 /*
930 * We don't want to do write behind due to ownership
931 * issues of the request structs. Maybe add it if I
932 * figure those out. JRA.
933 */
934
935 DEBUG(10,("smb2: scheduled aio_write for file "
936 "%s, offset %.0f, len = %u (mid = %u) "
937 "outstanding_aio_calls = %d\n",
938 fsp_str_dbg(fsp),
939 (double)in_offset,
940 (unsigned int)in_data.length,
941 (unsigned int)aio_ex->smbreq->mid,
942 outstanding_aio_calls ));
943
944 return NT_STATUS_OK;
945 }
946
947 static void aio_pwrite_smb2_done(struct tevent_req *req)
948 {
949 struct aio_extra *aio_ex = tevent_req_callback_data(
950 req, struct aio_extra);
951 ssize_t numtowrite = aio_ex->nbyte;
952 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
953 files_struct *fsp = aio_ex->fsp;
954 NTSTATUS status;
955 ssize_t nwritten;
956 int err = 0;
957
958 nwritten = pwrite_fsync_recv(req, &err);
959 TALLOC_FREE(req);
960
961 DEBUG(10, ("pwrite_recv returned %d, err = %s\n", (int)nwritten,
962 (nwritten == -1) ? strerror(err) : "no error"));
963
964 if (fsp == NULL) {
965 DEBUG( 3, ("aio_pwrite_smb2_done: file closed whilst "
966 "aio outstanding (mid[%llu]).\n",
967 (unsigned long long)aio_ex->smbreq->mid));
968 TALLOC_FREE(aio_ex);
969 return;
970 }
971
972 /* Unlock now we're done. */
973 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
974
975 mark_file_modified(fsp);
976
977 status = smb2_write_complete_nosync(subreq, nwritten, err);
978
979 DEBUG(10, ("smb2: scheduled aio_write completed "
980 "for file %s, offset %.0f, requested %u, "
981 "written = %u (errcode = %d, NTSTATUS = %s)\n",
982 fsp_str_dbg(fsp),
983 (double)aio_ex->offset,
984 (unsigned int)numtowrite,
985 (unsigned int)nwritten,
986 err, nt_errstr(status)));
987
988 if (!NT_STATUS_IS_OK(status)) {
989 tevent_req_nterror(subreq, status);
990 return;
991 }
992 tevent_req_done(subreq);
993 }
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