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s3: Use SMB_VFS_PWRITE_SEND in schedule_smb2_aio_write
[Samba/gebeck_regimport.git] / source3 / smbd / aio.c
blob5478b8442361ef5444f6474237d00999d66f00e9
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
26 #if defined(HAVE_AIO)
27
28 /* The signal we'll use to signify aio done. */
29 #ifndef RT_SIGNAL_AIO
30 #define RT_SIGNAL_AIO (SIGRTMIN+3)
31 #endif
32
33 #ifndef HAVE_STRUCT_SIGEVENT_SIGEV_VALUE_SIVAL_PTR
34 #ifdef HAVE_STRUCT_SIGEVENT_SIGEV_VALUE_SIGVAL_PTR
35 #define sival_int sigval_int
36 #define sival_ptr sigval_ptr
37 #endif
38 #endif
39
40 /****************************************************************************
41 The buffer we keep around whilst an aio request is in process.
42 *****************************************************************************/
43
44 struct aio_extra {
45 struct aio_extra *next, *prev;
46 SMB_STRUCT_AIOCB acb;
47 files_struct *fsp;
48 struct smb_request *smbreq;
49 DATA_BLOB outbuf;
50 struct lock_struct lock;
51 bool write_through;
52 int (*handle_completion)(struct aio_extra *ex, int errcode);
53 };
54
55 /****************************************************************************
56 Accessor function to return write_through state.
57 *****************************************************************************/
58
59 bool aio_write_through_requested(struct aio_extra *aio_ex)
60 {
61 return aio_ex->write_through;
62 }
63
64 /****************************************************************************
65 Initialize the signal handler for aio read/write.
66 *****************************************************************************/
67
68 static void smbd_aio_signal_handler(struct tevent_context *ev_ctx,
69 struct tevent_signal *se,
70 int signum, int count,
71 void *_info, void *private_data)
72 {
73 siginfo_t *info = (siginfo_t *)_info;
74 struct aio_extra *aio_ex = (struct aio_extra *)
75 info->si_value.sival_ptr;
76
77 smbd_aio_complete_aio_ex(aio_ex);
78 TALLOC_FREE(aio_ex);
79 }
80
81
82 bool initialize_async_io_handler(void)
83 {
84 static bool tried_signal_setup = false;
85
86 if (aio_signal_event) {
87 return true;
88 }
89 if (tried_signal_setup) {
90 return false;
91 }
92 tried_signal_setup = true;
93
94 aio_signal_event = tevent_add_signal(server_event_context(),
95 server_event_context(),
96 RT_SIGNAL_AIO, SA_SIGINFO,
97 smbd_aio_signal_handler,
98 NULL);
99 if (!aio_signal_event) {
100 DEBUG(10, ("Failed to setup RT_SIGNAL_AIO handler\n"));
101 return false;
102 }
103 return true;
104 }
105
106 static int handle_aio_read_complete(struct aio_extra *aio_ex, int errcode);
107 static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode);
108 static int handle_aio_smb2_read_complete(struct aio_extra *aio_ex, int errcode);
109 static int handle_aio_smb2_write_complete(struct aio_extra *aio_ex, int errcode);
110
111 static int aio_extra_destructor(struct aio_extra *aio_ex)
112 {
113 DLIST_REMOVE(aio_list_head, aio_ex);
114 outstanding_aio_calls--;
115 return 0;
116 }
117
118 /****************************************************************************
119 Create the extended aio struct we must keep around for the lifetime
120 of the aio call.
121 *****************************************************************************/
122
123 static struct aio_extra *create_aio_extra(TALLOC_CTX *mem_ctx,
124 files_struct *fsp,
125 size_t buflen)
126 {
127 struct aio_extra *aio_ex = talloc_zero(mem_ctx, struct aio_extra);
128
129 if (!aio_ex) {
130 return NULL;
131 }
132
133 /* The output buffer stored in the aio_ex is the start of
134 the smb return buffer. The buffer used in the acb
135 is the start of the reply data portion of that buffer. */
136
137 if (buflen) {
138 aio_ex->outbuf = data_blob_talloc(aio_ex, NULL, buflen);
139 if (!aio_ex->outbuf.data) {
140 TALLOC_FREE(aio_ex);
141 return NULL;
142 }
143 }
144 DLIST_ADD(aio_list_head, aio_ex);
145 talloc_set_destructor(aio_ex, aio_extra_destructor);
146 aio_ex->fsp = fsp;
147 outstanding_aio_calls++;
148 return aio_ex;
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 SMB_STRUCT_AIOCB *a;
164 size_t bufsize;
165 size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
166 struct tevent_req *req;
167
168 if (fsp->base_fsp != NULL) {
169 /* No AIO on streams yet */
170 DEBUG(10, ("AIO on streams not yet supported\n"));
171 return NT_STATUS_RETRY;
172 }
173
174 if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
175 && !SMB_VFS_AIO_FORCE(fsp)) {
176 /* Too small a read for aio request. */
177 DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
178 "for minimum aio_read of %u\n",
179 (unsigned int)smb_maxcnt,
180 (unsigned int)min_aio_read_size ));
181 return NT_STATUS_RETRY;
182 }
183
184 /* Only do this on non-chained and non-chaining reads not using the
185 * write cache. */
186 if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
187 return NT_STATUS_RETRY;
188 }
189
190 if (outstanding_aio_calls >= aio_pending_size) {
191 DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
192 "activities outstanding.\n",
193 outstanding_aio_calls ));
194 return NT_STATUS_RETRY;
195 }
196
197 /* The following is safe from integer wrap as we've already checked
198 smb_maxcnt is 128k or less. Wct is 12 for read replies */
199
200 bufsize = smb_size + 12 * 2 + smb_maxcnt;
201
202 if ((aio_ex = create_aio_extra(NULL, fsp, bufsize)) == NULL) {
203 DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
204 return NT_STATUS_NO_MEMORY;
205 }
206 aio_ex->handle_completion = handle_aio_read_complete;
207
208 construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
209 srv_set_message((char *)aio_ex->outbuf.data, 12, 0, True);
210 SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
211
212 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
213 (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
214 &aio_ex->lock);
215
216 /* Take the lock until the AIO completes. */
217 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
218 TALLOC_FREE(aio_ex);
219 return NT_STATUS_FILE_LOCK_CONFLICT;
220 }
221
222 a = &aio_ex->acb;
223
224 /* Now set up the aio record for the read call. */
225
226 a->aio_fildes = fsp->fh->fd;
227 a->aio_buf = smb_buf(aio_ex->outbuf.data);
228 a->aio_nbytes = smb_maxcnt;
229 a->aio_offset = startpos;
230 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
231 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
232 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
233
234 req = SMB_VFS_PREAD_SEND(aio_ex, fsp->conn->sconn->ev_ctx,
235 fsp, smb_buf(aio_ex->outbuf.data),
236 smb_maxcnt, startpos);
237 if (req == NULL) {
238 DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
239 "Error %s\n", strerror(errno) ));
240 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
241 TALLOC_FREE(aio_ex);
242 return NT_STATUS_RETRY;
243 }
244 tevent_req_set_callback(req, aio_pread_smb1_done, aio_ex);
245
246 aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
247
248 DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
249 "offset %.0f, len = %u (mid = %u)\n",
250 fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
251 (unsigned int)aio_ex->smbreq->mid ));
252
253 return NT_STATUS_OK;
254 }
255
256 static void aio_pread_smb1_done(struct tevent_req *req)
257 {
258 struct aio_extra *aio_ex = tevent_req_callback_data(
259 req, struct aio_extra);
260 files_struct *fsp = aio_ex->fsp;
261 int outsize;
262 char *outbuf = (char *)aio_ex->outbuf.data;
263 char *data = smb_buf(outbuf);
264 ssize_t nread;
265 int err;
266
267 nread = SMB_VFS_PREAD_RECV(req, &err);
268 TALLOC_FREE(req);
269
270 DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
271 (nread == -1) ? strerror(err) : "no error"));
272
273 if (fsp == NULL) {
274 DEBUG( 3, ("aio_pread_smb1_done: file closed whilst "
275 "aio outstanding (mid[%llu]).\n",
276 (unsigned long long)aio_ex->smbreq->mid));
277 TALLOC_FREE(aio_ex);
278 return;
279 }
280
281 /* Unlock now we're done. */
282 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
283
284 if (nread < 0) {
285 DEBUG( 3, ("handle_aio_read_complete: file %s nread == %d. "
286 "Error = %s\n", fsp_str_dbg(fsp), (int)nread,
287 strerror(err)));
288
289 ERROR_NT(map_nt_error_from_unix(err));
290 outsize = srv_set_message(outbuf,0,0,true);
291 } else {
292 outsize = srv_set_message(outbuf, 12, nread, False);
293 SSVAL(outbuf,smb_vwv2, 0xFFFF); /* Remaining - must be * -1. */
294 SSVAL(outbuf,smb_vwv5, nread);
295 SSVAL(outbuf,smb_vwv6, smb_offset(data,outbuf));
296 SSVAL(outbuf,smb_vwv7, ((nread >> 16) & 1));
297 SSVAL(smb_buf(outbuf), -2, nread);
298
299 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nread;
300 aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
301
302 DEBUG( 3, ("handle_aio_read_complete file %s max=%d "
303 "nread=%d\n", fsp_str_dbg(fsp),
304 (int)aio_ex->acb.aio_nbytes, (int)nread ) );
305
306 }
307 smb_setlen(outbuf, outsize - 4);
308 show_msg(outbuf);
309 if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
310 true, aio_ex->smbreq->seqnum+1,
311 IS_CONN_ENCRYPTED(fsp->conn), NULL)) {
312 exit_server_cleanly("handle_aio_read_complete: srv_send_smb "
313 "failed.");
314 }
315
316 DEBUG(10, ("handle_aio_read_complete: scheduled aio_read completed "
317 "for file %s, offset %.0f, len = %u\n",
318 fsp_str_dbg(fsp), (double)aio_ex->acb.aio_offset,
319 (unsigned int)nread));
320
321 TALLOC_FREE(aio_ex);
322 }
323
324 static void aio_pwrite_smb1_done(struct tevent_req *req);
325
326 /****************************************************************************
327 Set up an aio request from a SMBwriteX call.
328 *****************************************************************************/
329
330 NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
331 struct smb_request *smbreq,
332 files_struct *fsp, const char *data,
333 off_t startpos,
334 size_t numtowrite)
335 {
336 struct aio_extra *aio_ex;
337 SMB_STRUCT_AIOCB *a;
338 size_t bufsize;
339 size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
340 struct tevent_req *req;
341
342 if (fsp->base_fsp != NULL) {
343 /* No AIO on streams yet */
344 DEBUG(10, ("AIO on streams not yet supported\n"));
345 return NT_STATUS_RETRY;
346 }
347
348 if ((!min_aio_write_size || (numtowrite < min_aio_write_size))
349 && !SMB_VFS_AIO_FORCE(fsp)) {
350 /* Too small a write for aio request. */
351 DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
352 "small for minimum aio_write of %u\n",
353 (unsigned int)numtowrite,
354 (unsigned int)min_aio_write_size ));
355 return NT_STATUS_RETRY;
356 }
357
358 /* Only do this on non-chained and non-chaining writes not using the
359 * write cache. */
360 if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
361 return NT_STATUS_RETRY;
362 }
363
364 if (outstanding_aio_calls >= aio_pending_size) {
365 DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
366 "activities outstanding.\n",
367 outstanding_aio_calls ));
368 DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
369 "aio_write for file %s, offset %.0f, len = %u "
370 "(mid = %u)\n",
371 fsp_str_dbg(fsp), (double)startpos,
372 (unsigned int)numtowrite,
373 (unsigned int)smbreq->mid ));
374 return NT_STATUS_RETRY;
375 }
376
377 bufsize = smb_size + 6*2;
378
379 if (!(aio_ex = create_aio_extra(NULL, fsp, bufsize))) {
380 DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
381 return NT_STATUS_NO_MEMORY;
382 }
383 aio_ex->handle_completion = handle_aio_write_complete;
384 aio_ex->write_through = BITSETW(smbreq->vwv+7,0);
385
386 construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
387 srv_set_message((char *)aio_ex->outbuf.data, 6, 0, True);
388 SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
389
390 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
391 (uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
392 &aio_ex->lock);
393
394 /* Take the lock until the AIO completes. */
395 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
396 TALLOC_FREE(aio_ex);
397 return NT_STATUS_FILE_LOCK_CONFLICT;
398 }
399
400 a = &aio_ex->acb;
401
402 /* Now set up the aio record for the write call. */
403
404 a->aio_fildes = fsp->fh->fd;
405 a->aio_buf = discard_const_p(char, data);
406 a->aio_nbytes = numtowrite;
407 a->aio_offset = startpos;
408 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
409 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
410 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
411
412 req = SMB_VFS_PWRITE_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
413 data, numtowrite, startpos);
414 if (req == NULL) {
415 DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
416 "Error %s\n", strerror(errno) ));
417 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
418 TALLOC_FREE(aio_ex);
419 return NT_STATUS_RETRY;
420 }
421 tevent_req_set_callback(req, aio_pwrite_smb1_done, aio_ex);
422
423 aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
424
425 /* This should actually be improved to span the write. */
426 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
427 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
428
429 if (!aio_ex->write_through && !lp_syncalways(SNUM(fsp->conn))
430 && fsp->aio_write_behind) {
431 /* Lie to the client and immediately claim we finished the
432 * write. */
433 SSVAL(aio_ex->outbuf.data,smb_vwv2,numtowrite);
434 SSVAL(aio_ex->outbuf.data,smb_vwv4,(numtowrite>>16)&1);
435 show_msg((char *)aio_ex->outbuf.data);
436 if (!srv_send_smb(aio_ex->smbreq->sconn,
437 (char *)aio_ex->outbuf.data,
438 true, aio_ex->smbreq->seqnum+1,
439 IS_CONN_ENCRYPTED(fsp->conn),
440 &aio_ex->smbreq->pcd)) {
441 exit_server_cleanly("schedule_aio_write_and_X: "
442 "srv_send_smb failed.");
443 }
444 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
445 "behind for file %s\n", fsp_str_dbg(fsp)));
446 }
447
448 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write for file "
449 "%s, offset %.0f, len = %u (mid = %u) "
450 "outstanding_aio_calls = %d\n",
451 fsp_str_dbg(fsp), (double)startpos, (unsigned int)numtowrite,
452 (unsigned int)aio_ex->smbreq->mid, outstanding_aio_calls ));
453
454 return NT_STATUS_OK;
455 }
456
457 static void aio_pwrite_smb1_done(struct tevent_req *req)
458 {
459 struct aio_extra *aio_ex = tevent_req_callback_data(
460 req, struct aio_extra);
461 files_struct *fsp = aio_ex->fsp;
462 char *outbuf = (char *)aio_ex->outbuf.data;
463 ssize_t numtowrite = aio_ex->acb.aio_nbytes;
464 ssize_t nwritten;
465 int err;
466
467 nwritten = SMB_VFS_PWRITE_RECV(req, &err);
468 TALLOC_FREE(req);
469
470 DEBUG(10, ("pwrite_recv returned %d, err = %s\n", (int)nwritten,
471 (nwritten == -1) ? strerror(err) : "no error"));
472
473 if (fsp == NULL) {
474 DEBUG( 3, ("aio_pwrite_smb1_done: file closed whilst "
475 "aio outstanding (mid[%llu]).\n",
476 (unsigned long long)aio_ex->smbreq->mid));
477 TALLOC_FREE(aio_ex);
478 return;
479 }
480
481 /* Unlock now we're done. */
482 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
483
484 if (fsp->aio_write_behind) {
485
486 if (nwritten != numtowrite) {
487 if (nwritten == -1) {
488 DEBUG(5,("handle_aio_write_complete: "
489 "aio_write_behind failed ! File %s "
490 "is corrupt ! Error %s\n",
491 fsp_str_dbg(fsp), strerror(err)));
492 } else {
493 DEBUG(0,("handle_aio_write_complete: "
494 "aio_write_behind failed ! File %s "
495 "is corrupt ! Wanted %u bytes but "
496 "only wrote %d\n", fsp_str_dbg(fsp),
497 (unsigned int)numtowrite,
498 (int)nwritten ));
499 }
500 } else {
501 DEBUG(10,("handle_aio_write_complete: "
502 "aio_write_behind completed for file %s\n",
503 fsp_str_dbg(fsp)));
504 }
505 /* TODO: should no return success in case of an error !!! */
506 TALLOC_FREE(aio_ex);
507 return;
508 }
509
510 /* We don't need outsize or set_message here as we've already set the
511 fixed size length when we set up the aio call. */
512
513 if (nwritten == -1) {
514 DEBUG(3, ("handle_aio_write: file %s wanted %u bytes. "
515 "nwritten == %d. Error = %s\n",
516 fsp_str_dbg(fsp), (unsigned int)numtowrite,
517 (int)nwritten, strerror(err)));
518
519 ERROR_NT(map_nt_error_from_unix(err));
520 srv_set_message(outbuf,0,0,true);
521 } else {
522 NTSTATUS status;
523
524 SSVAL(outbuf,smb_vwv2,nwritten);
525 SSVAL(outbuf,smb_vwv4,(nwritten>>16)&1);
526 if (nwritten < (ssize_t)numtowrite) {
527 SCVAL(outbuf,smb_rcls,ERRHRD);
528 SSVAL(outbuf,smb_err,ERRdiskfull);
529 }
530
531 DEBUG(3,("handle_aio_write: %s, num=%d wrote=%d\n",
532 fsp_fnum_dbg(fsp), (int)numtowrite, (int)nwritten));
533 status = sync_file(fsp->conn,fsp, aio_ex->write_through);
534 if (!NT_STATUS_IS_OK(status)) {
535 ERROR_BOTH(map_nt_error_from_unix(errno),
536 ERRHRD, ERRdiskfull);
537 srv_set_message(outbuf,0,0,true);
538 DEBUG(5, ("handle_aio_write: sync_file for %s "
539 "returned %s\n",
540 fsp_str_dbg(fsp), nt_errstr(status)));
541 }
542
543 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nwritten;
544 }
545
546 show_msg(outbuf);
547 if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
548 true, aio_ex->smbreq->seqnum+1,
549 IS_CONN_ENCRYPTED(fsp->conn),
550 NULL)) {
551 exit_server_cleanly("handle_aio_write_complete: "
552 "srv_send_smb failed.");
553 }
554
555 DEBUG(10, ("handle_aio_write_complete: scheduled aio_write completed "
556 "for file %s, offset %.0f, requested %u, written = %u\n",
557 fsp_str_dbg(fsp), (double)aio_ex->acb.aio_offset,
558 (unsigned int)numtowrite, (unsigned int)nwritten));
559
560 TALLOC_FREE(aio_ex);
561 }
562
563 bool cancel_smb2_aio(struct smb_request *smbreq)
564 {
565 struct smbd_smb2_request *smb2req = smbreq->smb2req;
566 struct aio_extra *aio_ex = NULL;
567 int ret;
568
569 if (smb2req) {
570 aio_ex = talloc_get_type(smbreq->async_priv,
571 struct aio_extra);
572 }
573
574 if (aio_ex == NULL) {
575 return false;
576 }
577
578 if (aio_ex->fsp == NULL) {
579 return false;
580 }
581
582 ret = SMB_VFS_AIO_CANCEL(aio_ex->fsp, &aio_ex->acb);
583 if (ret != AIO_CANCELED) {
584 return false;
585 }
586
587 return true;
588 }
589
590 static void aio_pread_smb2_done(struct tevent_req *req);
591
592 /****************************************************************************
593 Set up an aio request from a SMB2 read call.
594 *****************************************************************************/
595
596 NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
597 struct smb_request *smbreq,
598 files_struct *fsp,
599 TALLOC_CTX *ctx,
600 DATA_BLOB *preadbuf,
601 off_t startpos,
602 size_t smb_maxcnt)
603 {
604 struct aio_extra *aio_ex;
605 SMB_STRUCT_AIOCB *a;
606 size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
607 struct tevent_req *req;
608
609 if (fsp->base_fsp != NULL) {
610 /* No AIO on streams yet */
611 DEBUG(10, ("AIO on streams not yet supported\n"));
612 return NT_STATUS_RETRY;
613 }
614
615 if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
616 && !SMB_VFS_AIO_FORCE(fsp)) {
617 /* Too small a read for aio request. */
618 DEBUG(10,("smb2: read size (%u) too small "
619 "for minimum aio_read of %u\n",
620 (unsigned int)smb_maxcnt,
621 (unsigned int)min_aio_read_size ));
622 return NT_STATUS_RETRY;
623 }
624
625 /* Only do this on reads not using the write cache. */
626 if (lp_write_cache_size(SNUM(conn)) != 0) {
627 return NT_STATUS_RETRY;
628 }
629
630 if (outstanding_aio_calls >= aio_pending_size) {
631 DEBUG(10,("smb2: Already have %d aio "
632 "activities outstanding.\n",
633 outstanding_aio_calls ));
634 return NT_STATUS_RETRY;
635 }
636
637 /* Create the out buffer. */
638 *preadbuf = data_blob_talloc(ctx, NULL, smb_maxcnt);
639 if (preadbuf->data == NULL) {
640 return NT_STATUS_NO_MEMORY;
641 }
642
643 if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
644 return NT_STATUS_NO_MEMORY;
645 }
646 aio_ex->handle_completion = handle_aio_smb2_read_complete;
647
648 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
649 (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
650 &aio_ex->lock);
651
652 /* Take the lock until the AIO completes. */
653 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
654 TALLOC_FREE(aio_ex);
655 return NT_STATUS_FILE_LOCK_CONFLICT;
656 }
657
658 a = &aio_ex->acb;
659
660 /* Now set up the aio record for the read call. */
661
662 a->aio_fildes = fsp->fh->fd;
663 a->aio_buf = preadbuf->data;
664 a->aio_nbytes = smb_maxcnt;
665 a->aio_offset = startpos;
666 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
667 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
668 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
669
670 req = SMB_VFS_PREAD_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
671 preadbuf->data, smb_maxcnt, startpos);
672 if (req == NULL) {
673 DEBUG(0, ("smb2: SMB_VFS_PREAD_SEND failed. "
674 "Error %s\n", strerror(errno)));
675 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
676 TALLOC_FREE(aio_ex);
677 return NT_STATUS_RETRY;
678 }
679 tevent_req_set_callback(req, aio_pread_smb2_done, aio_ex);
680
681 /* We don't need talloc_move here as both aio_ex and
682 * smbreq are children of smbreq->smb2req. */
683 aio_ex->smbreq = smbreq;
684 smbreq->async_priv = aio_ex;
685
686 DEBUG(10,("smb2: scheduled aio_read for file %s, "
687 "offset %.0f, len = %u (mid = %u)\n",
688 fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
689 (unsigned int)aio_ex->smbreq->mid ));
690
691 return NT_STATUS_OK;
692 }
693
694 static void aio_pread_smb2_done(struct tevent_req *req)
695 {
696 struct aio_extra *aio_ex = tevent_req_callback_data(
697 req, struct aio_extra);
698 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
699 files_struct *fsp = aio_ex->fsp;
700 NTSTATUS status;
701 ssize_t nread;
702 int err = 0;
703
704 nread = SMB_VFS_PREAD_RECV(req, &err);
705 TALLOC_FREE(req);
706
707 DEBUG(10, ("pread_recv returned %d, err = %s\n", (int)nread,
708 (nread == -1) ? strerror(err) : "no error"));
709
710 if (fsp == NULL) {
711 DEBUG( 3, ("aio_pread_smb2_done: file closed whilst "
712 "aio outstanding (mid[%llu]).\n",
713 (unsigned long long)aio_ex->smbreq->mid));
714 TALLOC_FREE(aio_ex);
715 return;
716 }
717
718 /* Unlock now we're done. */
719 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
720
721 /* Common error or success code processing for async or sync
722 read returns. */
723
724 status = smb2_read_complete(subreq, nread, err);
725
726 if (nread > 0) {
727 fsp->fh->pos = aio_ex->acb.aio_offset + nread;
728 fsp->fh->position_information = fsp->fh->pos;
729 }
730
731 DEBUG(10, ("smb2: scheduled aio_read completed "
732 "for file %s, offset %.0f, len = %u "
733 "(errcode = %d, NTSTATUS = %s)\n",
734 fsp_str_dbg(aio_ex->fsp),
735 (double)aio_ex->acb.aio_offset,
736 (unsigned int)nread,
737 err, nt_errstr(status)));
738
739 if (!NT_STATUS_IS_OK(status)) {
740 tevent_req_nterror(subreq, status);
741 return;
742 }
743 tevent_req_done(subreq);
744 }
745
746 static void aio_pwrite_smb2_done(struct tevent_req *req);
747
748 /****************************************************************************
749 Set up an aio request from a SMB2write call.
750 *****************************************************************************/
751
752 NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
753 struct smb_request *smbreq,
754 files_struct *fsp,
755 uint64_t in_offset,
756 DATA_BLOB in_data,
757 bool write_through)
758 {
759 struct aio_extra *aio_ex = NULL;
760 SMB_STRUCT_AIOCB *a = NULL;
761 size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
762 struct tevent_req *req;
763
764 if (fsp->base_fsp != NULL) {
765 /* No AIO on streams yet */
766 DEBUG(10, ("AIO on streams not yet supported\n"));
767 return NT_STATUS_RETRY;
768 }
769
770 if ((!min_aio_write_size || (in_data.length < min_aio_write_size))
771 && !SMB_VFS_AIO_FORCE(fsp)) {
772 /* Too small a write for aio request. */
773 DEBUG(10,("smb2: write size (%u) too "
774 "small for minimum aio_write of %u\n",
775 (unsigned int)in_data.length,
776 (unsigned int)min_aio_write_size ));
777 return NT_STATUS_RETRY;
778 }
779
780 /* Only do this on writes not using the write cache. */
781 if (lp_write_cache_size(SNUM(conn)) != 0) {
782 return NT_STATUS_RETRY;
783 }
784
785 if (outstanding_aio_calls >= aio_pending_size) {
786 DEBUG(3,("smb2: Already have %d aio "
787 "activities outstanding.\n",
788 outstanding_aio_calls ));
789 return NT_STATUS_RETRY;
790 }
791
792 if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
793 return NT_STATUS_NO_MEMORY;
794 }
795
796 aio_ex->handle_completion = handle_aio_smb2_write_complete;
797 aio_ex->write_through = write_through;
798
799 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
800 in_offset, (uint64_t)in_data.length, WRITE_LOCK,
801 &aio_ex->lock);
802
803 /* Take the lock until the AIO completes. */
804 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
805 TALLOC_FREE(aio_ex);
806 return NT_STATUS_FILE_LOCK_CONFLICT;
807 }
808
809 a = &aio_ex->acb;
810
811 /* Now set up the aio record for the write call. */
812
813 a->aio_fildes = fsp->fh->fd;
814 a->aio_buf = in_data.data;
815 a->aio_nbytes = in_data.length;
816 a->aio_offset = in_offset;
817 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
818 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
819 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
820
821 req = SMB_VFS_PWRITE_SEND(aio_ex, fsp->conn->sconn->ev_ctx, fsp,
822 in_data.data, in_data.length, in_offset);
823 if (req == NULL) {
824 DEBUG(3, ("smb2: SMB_VFS_PWRITE_SEND failed. "
825 "Error %s\n", strerror(errno)));
826 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
827 TALLOC_FREE(aio_ex);
828 return NT_STATUS_RETRY;
829 }
830 tevent_req_set_callback(req, aio_pwrite_smb2_done, aio_ex);
831
832 /* We don't need talloc_move here as both aio_ex and
833 * smbreq are children of smbreq->smb2req. */
834 aio_ex->smbreq = smbreq;
835 smbreq->async_priv = aio_ex;
836
837 /* This should actually be improved to span the write. */
838 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
839 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
840
841 /*
842 * We don't want to do write behind due to ownership
843 * issues of the request structs. Maybe add it if I
844 * figure those out. JRA.
845 */
846
847 DEBUG(10,("smb2: scheduled aio_write for file "
848 "%s, offset %.0f, len = %u (mid = %u) "
849 "outstanding_aio_calls = %d\n",
850 fsp_str_dbg(fsp),
851 (double)in_offset,
852 (unsigned int)in_data.length,
853 (unsigned int)aio_ex->smbreq->mid,
854 outstanding_aio_calls ));
855
856 return NT_STATUS_OK;
857 }
858
859 static void aio_pwrite_smb2_done(struct tevent_req *req)
860 {
861 struct aio_extra *aio_ex = tevent_req_callback_data(
862 req, struct aio_extra);
863 ssize_t numtowrite = aio_ex->acb.aio_nbytes;
864 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
865 files_struct *fsp = aio_ex->fsp;
866 NTSTATUS status;
867 ssize_t nwritten;
868 int err = 0;
869
870 nwritten = SMB_VFS_PWRITE_RECV(req, &err);
871 TALLOC_FREE(req);
872
873 DEBUG(10, ("pwrite_recv returned %d, err = %s\n", (int)nwritten,
874 (nwritten == -1) ? strerror(err) : "no error"));
875
876 if (fsp == NULL) {
877 DEBUG( 3, ("aio_pwrite_smb2_done: file closed whilst "
878 "aio outstanding (mid[%llu]).\n",
879 (unsigned long long)aio_ex->smbreq->mid));
880 TALLOC_FREE(aio_ex);
881 return;
882 }
883
884 /* Unlock now we're done. */
885 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
886
887 status = smb2_write_complete(subreq, nwritten, err);
888
889 DEBUG(10, ("smb2: scheduled aio_write completed "
890 "for file %s, offset %.0f, requested %u, "
891 "written = %u (errcode = %d, NTSTATUS = %s)\n",
892 fsp_str_dbg(fsp),
893 (double)aio_ex->acb.aio_offset,
894 (unsigned int)numtowrite,
895 (unsigned int)nwritten,
896 err, nt_errstr(status)));
897
898 if (!NT_STATUS_IS_OK(status)) {
899 tevent_req_nterror(subreq, status);
900 return;
901 }
902 tevent_req_done(subreq);
903 }
904
905 /****************************************************************************
906 Complete the read and return the data or error back to the client.
907 Returns errno or zero if all ok.
908 *****************************************************************************/
909
910 static int handle_aio_read_complete(struct aio_extra *aio_ex, int errcode)
911 {
912 int outsize;
913 char *outbuf = (char *)aio_ex->outbuf.data;
914 char *data = smb_buf(outbuf);
915 ssize_t nread = SMB_VFS_AIO_RETURN(aio_ex->fsp,&aio_ex->acb);
916
917 if (nread < 0) {
918 /* We're relying here on the fact that if the fd is
919 closed then the aio will complete and aio_return
920 will return an error. Hopefully this is
921 true.... JRA. */
922
923 DEBUG( 3,( "handle_aio_read_complete: file %s nread == %d. "
924 "Error = %s\n",
925 fsp_str_dbg(aio_ex->fsp), (int)nread, strerror(errcode)));
926
927 ERROR_NT(map_nt_error_from_unix(errcode));
928 outsize = srv_set_message(outbuf,0,0,true);
929 } else {
930 outsize = srv_set_message(outbuf,12,nread,False);
931 SSVAL(outbuf,smb_vwv2,0xFFFF); /* Remaining - must be * -1. */
932 SSVAL(outbuf,smb_vwv5,nread);
933 SSVAL(outbuf,smb_vwv6,smb_offset(data,outbuf));
934 SSVAL(outbuf,smb_vwv7,((nread >> 16) & 1));
935 SSVAL(smb_buf(outbuf),-2,nread);
936
937 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nread;
938 aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
939
940 DEBUG( 3, ( "handle_aio_read_complete file %s max=%d "
941 "nread=%d\n",
942 fsp_str_dbg(aio_ex->fsp),
943 (int)aio_ex->acb.aio_nbytes, (int)nread ) );
944
945 }
946 smb_setlen(outbuf,outsize - 4);
947 show_msg(outbuf);
948 if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
949 true, aio_ex->smbreq->seqnum+1,
950 IS_CONN_ENCRYPTED(aio_ex->fsp->conn), NULL)) {
951 exit_server_cleanly("handle_aio_read_complete: srv_send_smb "
952 "failed.");
953 }
954
955 DEBUG(10,("handle_aio_read_complete: scheduled aio_read completed "
956 "for file %s, offset %.0f, len = %u\n",
957 fsp_str_dbg(aio_ex->fsp), (double)aio_ex->acb.aio_offset,
958 (unsigned int)nread ));
959
960 return errcode;
961 }
962
963 /****************************************************************************
964 Complete the write and return the data or error back to the client.
965 Returns error code or zero if all ok.
966 *****************************************************************************/
967
968 static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode)
969 {
970 files_struct *fsp = aio_ex->fsp;
971 char *outbuf = (char *)aio_ex->outbuf.data;
972 ssize_t numtowrite = aio_ex->acb.aio_nbytes;
973 ssize_t nwritten = SMB_VFS_AIO_RETURN(fsp,&aio_ex->acb);
974
975 if (fsp->aio_write_behind) {
976 if (nwritten != numtowrite) {
977 if (nwritten == -1) {
978 DEBUG(5,("handle_aio_write_complete: "
979 "aio_write_behind failed ! File %s "
980 "is corrupt ! Error %s\n",
981 fsp_str_dbg(fsp), strerror(errcode)));
982 } else {
983 DEBUG(0,("handle_aio_write_complete: "
984 "aio_write_behind failed ! File %s "
985 "is corrupt ! Wanted %u bytes but "
986 "only wrote %d\n", fsp_str_dbg(fsp),
987 (unsigned int)numtowrite,
988 (int)nwritten ));
989 errcode = EIO;
990 }
991 } else {
992 DEBUG(10,("handle_aio_write_complete: "
993 "aio_write_behind completed for file %s\n",
994 fsp_str_dbg(fsp)));
995 }
996 /* TODO: should no return 0 in case of an error !!! */
997 return 0;
998 }
999
1000 /* We don't need outsize or set_message here as we've already set the
1001 fixed size length when we set up the aio call. */
1002
1003 if(nwritten == -1) {
1004 DEBUG( 3,( "handle_aio_write: file %s wanted %u bytes. "
1005 "nwritten == %d. Error = %s\n",
1006 fsp_str_dbg(fsp), (unsigned int)numtowrite,
1007 (int)nwritten, strerror(errcode) ));
1008
1009 ERROR_NT(map_nt_error_from_unix(errcode));
1010 srv_set_message(outbuf,0,0,true);
1011 } else {
1012 NTSTATUS status;
1013
1014 SSVAL(outbuf,smb_vwv2,nwritten);
1015 SSVAL(outbuf,smb_vwv4,(nwritten>>16)&1);
1016 if (nwritten < (ssize_t)numtowrite) {
1017 SCVAL(outbuf,smb_rcls,ERRHRD);
1018 SSVAL(outbuf,smb_err,ERRdiskfull);
1019 }
1020
1021 DEBUG(3,("handle_aio_write: %s, num=%d wrote=%d\n",
1022 fsp_fnum_dbg(fsp), (int)numtowrite, (int)nwritten));
1023 status = sync_file(fsp->conn,fsp, aio_ex->write_through);
1024 if (!NT_STATUS_IS_OK(status)) {
1025 errcode = errno;
1026 ERROR_BOTH(map_nt_error_from_unix(errcode),
1027 ERRHRD, ERRdiskfull);
1028 srv_set_message(outbuf,0,0,true);
1029 DEBUG(5,("handle_aio_write: sync_file for %s returned %s\n",
1030 fsp_str_dbg(fsp), nt_errstr(status)));
1031 }
1032
1033 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nwritten;
1034
1035 mark_file_modified(aio_ex->fsp);
1036 }
1037
1038 show_msg(outbuf);
1039 if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
1040 true, aio_ex->smbreq->seqnum+1,
1041 IS_CONN_ENCRYPTED(fsp->conn),
1042 NULL)) {
1043 exit_server_cleanly("handle_aio_write_complete: "
1044 "srv_send_smb failed.");
1045 }
1046
1047 DEBUG(10,("handle_aio_write_complete: scheduled aio_write completed "
1048 "for file %s, offset %.0f, requested %u, written = %u\n",
1049 fsp_str_dbg(fsp), (double)aio_ex->acb.aio_offset,
1050 (unsigned int)numtowrite, (unsigned int)nwritten ));
1051
1052 return errcode;
1053 }
1054
1055 /****************************************************************************
1056 Complete the read and return the data or error back to the client.
1057 Returns errno or zero if all ok.
1058 *****************************************************************************/
1059
1060 static int handle_aio_smb2_read_complete(struct aio_extra *aio_ex, int errcode)
1061 {
1062 NTSTATUS status;
1063 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
1064 ssize_t nread = SMB_VFS_AIO_RETURN(aio_ex->fsp,&aio_ex->acb);
1065
1066 /* Common error or success code processing for async or sync
1067 read returns. */
1068
1069 status = smb2_read_complete(subreq, nread, errcode);
1070
1071 if (nread > 0) {
1072 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nread;
1073 aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
1074 }
1075
1076 DEBUG(10,("smb2: scheduled aio_read completed "
1077 "for file %s, offset %.0f, len = %u "
1078 "(errcode = %d, NTSTATUS = %s)\n",
1079 fsp_str_dbg(aio_ex->fsp),
1080 (double)aio_ex->acb.aio_offset,
1081 (unsigned int)nread,
1082 errcode,
1083 nt_errstr(status) ));
1084
1085 if (!NT_STATUS_IS_OK(status)) {
1086 tevent_req_nterror(subreq, status);
1087 return errcode;
1088 }
1089
1090 tevent_req_done(subreq);
1091 return errcode;
1092 }
1093
1094 /****************************************************************************
1095 Complete the SMB2 write and return the data or error back to the client.
1096 Returns error code or zero if all ok.
1097 *****************************************************************************/
1098
1099 static int handle_aio_smb2_write_complete(struct aio_extra *aio_ex, int errcode)
1100 {
1101 files_struct *fsp = aio_ex->fsp;
1102 ssize_t numtowrite = aio_ex->acb.aio_nbytes;
1103 ssize_t nwritten = SMB_VFS_AIO_RETURN(fsp,&aio_ex->acb);
1104 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
1105 NTSTATUS status;
1106
1107 status = smb2_write_complete(subreq, nwritten, errcode);
1108
1109 DEBUG(10,("smb2: scheduled aio_write completed "
1110 "for file %s, offset %.0f, requested %u, "
1111 "written = %u (errcode = %d, NTSTATUS = %s)\n",
1112 fsp_str_dbg(fsp),
1113 (double)aio_ex->acb.aio_offset,
1114 (unsigned int)numtowrite,
1115 (unsigned int)nwritten,
1116 errcode,
1117 nt_errstr(status) ));
1118
1119 if (!NT_STATUS_IS_OK(status)) {
1120 tevent_req_nterror(subreq, status);
1121 return errcode;
1122 }
1123
1124 mark_file_modified(fsp);
1125
1126 tevent_req_done(subreq);
1127 return errcode;
1128 }
1129
1130 /****************************************************************************
1131 Handle any aio completion. Returns True if finished (and sets *perr if err
1132 was non-zero), False if not.
1133 *****************************************************************************/
1134
1135 static bool handle_aio_completed(struct aio_extra *aio_ex, int *perr)
1136 {
1137 files_struct *fsp = NULL;
1138 int err;
1139
1140 if(!aio_ex) {
1141 DEBUG(3, ("handle_aio_completed: Non-existing aio_ex passed\n"));
1142 return false;
1143 }
1144
1145 if (!aio_ex->fsp) {
1146 DEBUG(3, ("handle_aio_completed: aio_ex->fsp == NULL\n"));
1147 return false;
1148 }
1149
1150 fsp = aio_ex->fsp;
1151
1152 /* Ensure the operation has really completed. */
1153 err = SMB_VFS_AIO_ERROR(fsp, &aio_ex->acb);
1154 if (err == EINPROGRESS) {
1155 DEBUG(10,( "handle_aio_completed: operation mid %llu still in "
1156 "process for file %s\n",
1157 (unsigned long long)aio_ex->smbreq->mid,
1158 fsp_str_dbg(aio_ex->fsp)));
1159 return False;
1160 }
1161
1162 if (err == ECANCELED) {
1163 DEBUG(10,( "handle_aio_completed: operation mid %llu canceled "
1164 "for file %s\n",
1165 (unsigned long long)aio_ex->smbreq->mid,
1166 fsp_str_dbg(aio_ex->fsp)));
1167 }
1168
1169 /* Unlock now we're done. */
1170 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
1171
1172 err = aio_ex->handle_completion(aio_ex, err);
1173 if (err) {
1174 *perr = err; /* Only save non-zero errors. */
1175 }
1176
1177 return True;
1178 }
1179
1180 /****************************************************************************
1181 Handle any aio completion inline.
1182 *****************************************************************************/
1183
1184 void smbd_aio_complete_aio_ex(struct aio_extra *aio_ex)
1185 {
1186 files_struct *fsp = NULL;
1187 int ret = 0;
1188
1189 DEBUG(10,("smbd_aio_complete_mid: mid[%llu]\n",
1190 (unsigned long long)aio_ex->smbreq->mid));
1191
1192 fsp = aio_ex->fsp;
1193 if (fsp == NULL) {
1194 /* file was closed whilst I/O was outstanding. Just
1195 * ignore. */
1196 DEBUG( 3,( "smbd_aio_complete_mid: file closed whilst "
1197 "aio outstanding (mid[%llu]).\n",
1198 (unsigned long long)aio_ex->smbreq->mid));
1199 return;
1200 }
1201
1202 if (!handle_aio_completed(aio_ex, &ret)) {
1203 return;
1204 }
1205 }
1206
1207 /****************************************************************************
1208 We're doing write behind and the client closed the file. Wait up to 45
1209 seconds (my arbitrary choice) for the aio to complete. Return 0 if all writes
1210 completed, errno to return if not.
1211 *****************************************************************************/
1212
1213 #define SMB_TIME_FOR_AIO_COMPLETE_WAIT 45
1214
1215 int wait_for_aio_completion(files_struct *fsp)
1216 {
1217 struct aio_extra *aio_ex;
1218 const SMB_STRUCT_AIOCB **aiocb_list;
1219 int aio_completion_count = 0;
1220 time_t start_time = time_mono(NULL);
1221 int seconds_left;
1222
1223 for (seconds_left = SMB_TIME_FOR_AIO_COMPLETE_WAIT;
1224 seconds_left >= 0;) {
1225 int err = 0;
1226 int i;
1227 struct timespec ts;
1228
1229 aio_completion_count = 0;
1230 for( aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) {
1231 if (aio_ex->fsp == fsp) {
1232 aio_completion_count++;
1233 }
1234 }
1235
1236 if (!aio_completion_count) {
1237 return 0;
1238 }
1239
1240 DEBUG(3,("wait_for_aio_completion: waiting for %d aio events "
1241 "to complete.\n", aio_completion_count ));
1242
1243 aiocb_list = SMB_MALLOC_ARRAY(const SMB_STRUCT_AIOCB *,
1244 aio_completion_count);
1245 if (!aiocb_list) {
1246 return ENOMEM;
1247 }
1248
1249 for( i = 0, aio_ex = aio_list_head;
1250 aio_ex;
1251 aio_ex = aio_ex->next) {
1252 if (aio_ex->fsp == fsp) {
1253 aiocb_list[i++] = &aio_ex->acb;
1254 }
1255 }
1256
1257 /* Now wait up to seconds_left for completion. */
1258 ts.tv_sec = seconds_left;
1259 ts.tv_nsec = 0;
1260
1261 DEBUG(10,("wait_for_aio_completion: %d events, doing a wait "
1262 "of %d seconds.\n",
1263 aio_completion_count, seconds_left ));
1264
1265 err = SMB_VFS_AIO_SUSPEND(fsp, aiocb_list,
1266 aio_completion_count, &ts);
1267
1268 DEBUG(10,("wait_for_aio_completion: returned err = %d, "
1269 "errno = %s\n", err, strerror(errno) ));
1270
1271 if (err == -1 && errno == EAGAIN) {
1272 DEBUG(0,("wait_for_aio_completion: aio_suspend timed "
1273 "out waiting for %d events after a wait of "
1274 "%d seconds\n", aio_completion_count,
1275 seconds_left));
1276 /* Timeout. */
1277 SAFE_FREE(aiocb_list);
1278 /* We're hosed here - IO may complete
1279 and trample over memory if we free
1280 the aio_ex struct, but if we don't
1281 we leak IO requests. I think smb_panic()
1282 if the right thing to do here. JRA.
1283 */
1284 smb_panic("AIO suspend timed out - cannot continue.");
1285 return EIO;
1286 }
1287
1288 /* One or more events might have completed - process them if
1289 * so. */
1290 for( i = 0; i < aio_completion_count; i++) {
1291 aio_ex = (struct aio_extra *)aiocb_list[i]->aio_sigevent.sigev_value.sival_ptr;
1292
1293 if (!handle_aio_completed(aio_ex, &err)) {
1294 continue;
1295 }
1296 TALLOC_FREE(aio_ex);
1297 }
1298
1299 SAFE_FREE(aiocb_list);
1300 seconds_left = SMB_TIME_FOR_AIO_COMPLETE_WAIT
1301 - (time_mono(NULL) - start_time);
1302 }
1303
1304 /* We timed out - we don't know why. Return ret if already an error,
1305 * else EIO. */
1306 DEBUG(10,("wait_for_aio_completion: aio_suspend timed out waiting "
1307 "for %d events\n",
1308 aio_completion_count));
1309
1310 return EIO;
1311 }
1312
1313 #else
1314
1315 bool initialize_async_io_handler(void)
1316 {
1317 return false;
1318 }
1319
1320 NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
1321 struct smb_request *smbreq,
1322 files_struct *fsp, off_t startpos,
1323 size_t smb_maxcnt)
1324 {
1325 return NT_STATUS_RETRY;
1326 }
1327
1328 NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
1329 struct smb_request *smbreq,
1330 files_struct *fsp, const char *data,
1331 off_t startpos,
1332 size_t numtowrite)
1333 {
1334 return NT_STATUS_RETRY;
1335 }
1336
1337 bool cancel_smb2_aio(struct smb_request *smbreq)
1338 {
1339 return false;
1340 }
1341
1342 NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
1343 struct smb_request *smbreq,
1344 files_struct *fsp,
1345 TALLOC_CTX *ctx,
1346 DATA_BLOB *preadbuf,
1347 off_t startpos,
1348 size_t smb_maxcnt)
1349 {
1350 return NT_STATUS_RETRY;
1351 }
1352
1353 NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
1354 struct smb_request *smbreq,
1355 files_struct *fsp,
1356 uint64_t in_offset,
1357 DATA_BLOB in_data,
1358 bool write_through)
1359 {
1360 return NT_STATUS_RETRY;
1361 }
1362
1363 int wait_for_aio_completion(files_struct *fsp)
1364 {
1365 return 0;
1366 }
1367
1368 void smbd_aio_complete_mid(uint64_t mid);
1369
1370 #endif
reg import