2 Unix SMB/Netbios implementation.
4 async_io read handling using POSIX async io.
5 Copyright (C) Jeremy Allison 2005.
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.
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.
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/>.
22 #include "smbd/smbd.h"
23 #include "smbd/globals.h"
24 #include "../lib/util/tevent_ntstatus.h"
28 /* The signal we'll use to signify aio done. */
30 #define RT_SIGNAL_AIO (SIGRTMIN+3)
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
40 /****************************************************************************
41 The buffer we keep around whilst an aio request is in process.
42 *****************************************************************************/
45 struct aio_extra *next, *prev;
48 struct smb_request *smbreq;
50 struct lock_struct lock;
53 int (*handle_completion)(struct aio_extra *ex, int errcode);
56 /****************************************************************************
57 Initialize the signal handler for aio read/write.
58 *****************************************************************************/
60 static void smbd_aio_signal_handler(struct tevent_context *ev_ctx,
61 struct tevent_signal *se,
62 int signum, int count,
63 void *_info, void *private_data)
65 siginfo_t *info = (siginfo_t *)_info;
66 struct aio_extra *aio_ex = (struct aio_extra *)
67 info->si_value.sival_ptr;
69 smbd_aio_complete_aio_ex(aio_ex);
74 static bool initialize_async_io_handler(void)
76 static bool tried_signal_setup = false;
78 if (aio_signal_event) {
81 if (tried_signal_setup) {
84 tried_signal_setup = true;
86 aio_signal_event = tevent_add_signal(server_event_context(),
87 server_event_context(),
88 RT_SIGNAL_AIO, SA_SIGINFO,
89 smbd_aio_signal_handler,
91 if (!aio_signal_event) {
92 DEBUG(10, ("Failed to setup RT_SIGNAL_AIO handler\n"));
96 /* tevent supports 100 signal with SA_SIGINFO */
97 aio_pending_size = 100;
101 static int handle_aio_read_complete(struct aio_extra *aio_ex, int errcode);
102 static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode);
103 static int handle_aio_smb2_read_complete(struct aio_extra *aio_ex, int errcode);
104 static int handle_aio_smb2_write_complete(struct aio_extra *aio_ex, int errcode);
106 static int aio_extra_destructor(struct aio_extra *aio_ex)
108 DLIST_REMOVE(aio_list_head, aio_ex);
112 /****************************************************************************
113 Create the extended aio struct we must keep around for the lifetime
115 *****************************************************************************/
117 static struct aio_extra *create_aio_extra(TALLOC_CTX *mem_ctx,
121 struct aio_extra *aio_ex = talloc_zero(mem_ctx, struct aio_extra);
127 /* The output buffer stored in the aio_ex is the start of
128 the smb return buffer. The buffer used in the acb
129 is the start of the reply data portion of that buffer. */
132 aio_ex->outbuf = data_blob_talloc(aio_ex, NULL, buflen);
133 if (!aio_ex->outbuf.data) {
138 DLIST_ADD(aio_list_head, aio_ex);
139 talloc_set_destructor(aio_ex, aio_extra_destructor);
144 /****************************************************************************
145 Set up an aio request from a SMBreadX call.
146 *****************************************************************************/
148 NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
149 struct smb_request *smbreq,
150 files_struct *fsp, SMB_OFF_T startpos,
153 struct aio_extra *aio_ex;
156 size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
159 /* Ensure aio is initialized. */
160 if (!initialize_async_io_handler()) {
161 return NT_STATUS_RETRY;
164 if (fsp->base_fsp != NULL) {
165 /* No AIO on streams yet */
166 DEBUG(10, ("AIO on streams not yet supported\n"));
167 return NT_STATUS_RETRY;
170 if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
171 && !SMB_VFS_AIO_FORCE(fsp)) {
172 /* Too small a read for aio request. */
173 DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
174 "for minimum aio_read of %u\n",
175 (unsigned int)smb_maxcnt,
176 (unsigned int)min_aio_read_size ));
177 return NT_STATUS_RETRY;
180 /* Only do this on non-chained and non-chaining reads not using the
182 if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
183 return NT_STATUS_RETRY;
186 if (outstanding_aio_calls >= aio_pending_size) {
187 DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
188 "activities outstanding.\n",
189 outstanding_aio_calls ));
190 return NT_STATUS_RETRY;
193 /* The following is safe from integer wrap as we've already checked
194 smb_maxcnt is 128k or less. Wct is 12 for read replies */
196 bufsize = smb_size + 12 * 2 + smb_maxcnt;
198 if ((aio_ex = create_aio_extra(NULL, fsp, bufsize)) == NULL) {
199 DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
200 return NT_STATUS_NO_MEMORY;
202 aio_ex->handle_completion = handle_aio_read_complete;
204 construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
205 srv_set_message((char *)aio_ex->outbuf.data, 12, 0, True);
206 SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
208 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
209 (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
212 /* Take the lock until the AIO completes. */
213 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
215 return NT_STATUS_FILE_LOCK_CONFLICT;
220 /* Now set up the aio record for the read call. */
222 a->aio_fildes = fsp->fh->fd;
223 a->aio_buf = smb_buf(aio_ex->outbuf.data);
224 a->aio_nbytes = smb_maxcnt;
225 a->aio_offset = startpos;
226 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
227 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
228 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
230 ret = SMB_VFS_AIO_READ(fsp, a);
232 DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
233 "Error %s\n", strerror(errno) ));
234 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
236 return NT_STATUS_RETRY;
239 outstanding_aio_calls++;
240 aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
242 DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
243 "offset %.0f, len = %u (mid = %u)\n",
244 fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
245 (unsigned int)aio_ex->smbreq->mid ));
250 /****************************************************************************
251 Set up an aio request from a SMBwriteX call.
252 *****************************************************************************/
254 NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
255 struct smb_request *smbreq,
256 files_struct *fsp, const char *data,
260 struct aio_extra *aio_ex;
263 size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
266 /* Ensure aio is initialized. */
267 if (!initialize_async_io_handler()) {
268 return NT_STATUS_RETRY;
271 if (fsp->base_fsp != NULL) {
272 /* No AIO on streams yet */
273 DEBUG(10, ("AIO on streams not yet supported\n"));
274 return NT_STATUS_RETRY;
277 if ((!min_aio_write_size || (numtowrite < min_aio_write_size))
278 && !SMB_VFS_AIO_FORCE(fsp)) {
279 /* Too small a write for aio request. */
280 DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
281 "small for minimum aio_write of %u\n",
282 (unsigned int)numtowrite,
283 (unsigned int)min_aio_write_size ));
284 return NT_STATUS_RETRY;
287 /* Only do this on non-chained and non-chaining writes not using the
289 if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
290 return NT_STATUS_RETRY;
293 if (outstanding_aio_calls >= aio_pending_size) {
294 DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
295 "activities outstanding.\n",
296 outstanding_aio_calls ));
297 DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
298 "aio_write for file %s, offset %.0f, len = %u "
300 fsp_str_dbg(fsp), (double)startpos,
301 (unsigned int)numtowrite,
302 (unsigned int)smbreq->mid ));
303 return NT_STATUS_RETRY;
306 bufsize = smb_size + 6*2;
308 if (!(aio_ex = create_aio_extra(NULL, fsp, bufsize))) {
309 DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
310 return NT_STATUS_NO_MEMORY;
312 aio_ex->handle_completion = handle_aio_write_complete;
313 aio_ex->write_through = BITSETW(smbreq->vwv+7,0);
315 construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
316 srv_set_message((char *)aio_ex->outbuf.data, 6, 0, True);
317 SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
319 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
320 (uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
323 /* Take the lock until the AIO completes. */
324 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
326 return NT_STATUS_FILE_LOCK_CONFLICT;
331 /* Now set up the aio record for the write call. */
333 a->aio_fildes = fsp->fh->fd;
334 a->aio_buf = discard_const_p(char, data);
335 a->aio_nbytes = numtowrite;
336 a->aio_offset = startpos;
337 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
338 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
339 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
341 ret = SMB_VFS_AIO_WRITE(fsp, a);
343 DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
344 "Error %s\n", strerror(errno) ));
345 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
347 return NT_STATUS_RETRY;
350 outstanding_aio_calls++;
351 aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
353 /* This should actually be improved to span the write. */
354 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
355 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
357 if (!aio_ex->write_through && !lp_syncalways(SNUM(fsp->conn))
358 && fsp->aio_write_behind) {
359 /* Lie to the client and immediately claim we finished the
361 SSVAL(aio_ex->outbuf.data,smb_vwv2,numtowrite);
362 SSVAL(aio_ex->outbuf.data,smb_vwv4,(numtowrite>>16)&1);
363 show_msg((char *)aio_ex->outbuf.data);
364 if (!srv_send_smb(aio_ex->smbreq->sconn,
365 (char *)aio_ex->outbuf.data,
366 true, aio_ex->smbreq->seqnum+1,
367 IS_CONN_ENCRYPTED(fsp->conn),
368 &aio_ex->smbreq->pcd)) {
369 exit_server_cleanly("schedule_aio_write_and_X: "
370 "srv_send_smb failed.");
372 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
373 "behind for file %s\n", fsp_str_dbg(fsp)));
376 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write for file "
377 "%s, offset %.0f, len = %u (mid = %u) "
378 "outstanding_aio_calls = %d\n",
379 fsp_str_dbg(fsp), (double)startpos, (unsigned int)numtowrite,
380 (unsigned int)aio_ex->smbreq->mid, outstanding_aio_calls ));
385 bool cancel_smb2_aio(struct smb_request *smbreq)
387 struct smbd_smb2_request *smb2req = smbreq->smb2req;
388 struct aio_extra *aio_ex = NULL;
392 aio_ex = talloc_get_type(smbreq->async_priv,
396 if (aio_ex == NULL) {
400 if (aio_ex->fsp == NULL) {
404 ret = SMB_VFS_AIO_CANCEL(aio_ex->fsp, &aio_ex->acb);
405 if (ret != AIO_CANCELED) {
412 /****************************************************************************
413 Set up an aio request from a SMB2 read call.
414 *****************************************************************************/
416 NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
417 struct smb_request *smbreq,
424 struct aio_extra *aio_ex;
426 size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
429 /* Ensure aio is initialized. */
430 if (!initialize_async_io_handler()) {
431 return NT_STATUS_RETRY;
434 if (fsp->base_fsp != NULL) {
435 /* No AIO on streams yet */
436 DEBUG(10, ("AIO on streams not yet supported\n"));
437 return NT_STATUS_RETRY;
440 if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
441 && !SMB_VFS_AIO_FORCE(fsp)) {
442 /* Too small a read for aio request. */
443 DEBUG(10,("smb2: read size (%u) too small "
444 "for minimum aio_read of %u\n",
445 (unsigned int)smb_maxcnt,
446 (unsigned int)min_aio_read_size ));
447 return NT_STATUS_RETRY;
450 /* Only do this on reads not using the write cache. */
451 if (lp_write_cache_size(SNUM(conn)) != 0) {
452 return NT_STATUS_RETRY;
455 if (outstanding_aio_calls >= aio_pending_size) {
456 DEBUG(10,("smb2: Already have %d aio "
457 "activities outstanding.\n",
458 outstanding_aio_calls ));
459 return NT_STATUS_RETRY;
462 /* Create the out buffer. */
463 *preadbuf = data_blob_talloc(ctx, NULL, smb_maxcnt);
464 if (preadbuf->data == NULL) {
465 return NT_STATUS_NO_MEMORY;
468 if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
469 return NT_STATUS_NO_MEMORY;
471 aio_ex->handle_completion = handle_aio_smb2_read_complete;
472 aio_ex->pass_cancel = true;
474 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
475 (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
478 /* Take the lock until the AIO completes. */
479 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
481 return NT_STATUS_FILE_LOCK_CONFLICT;
486 /* Now set up the aio record for the read call. */
488 a->aio_fildes = fsp->fh->fd;
489 a->aio_buf = preadbuf->data;
490 a->aio_nbytes = smb_maxcnt;
491 a->aio_offset = startpos;
492 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
493 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
494 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
496 ret = SMB_VFS_AIO_READ(fsp, a);
498 DEBUG(0,("smb2: aio_read failed. "
499 "Error %s\n", strerror(errno) ));
500 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
502 return NT_STATUS_RETRY;
505 outstanding_aio_calls++;
506 /* We don't need talloc_move here as both aio_ex and
507 * smbreq are children of smbreq->smb2req. */
508 aio_ex->smbreq = smbreq;
509 smbreq->async_priv = aio_ex;
511 DEBUG(10,("smb2: scheduled aio_read for file %s, "
512 "offset %.0f, len = %u (mid = %u)\n",
513 fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
514 (unsigned int)aio_ex->smbreq->mid ));
519 /****************************************************************************
520 Set up an aio request from a SMB2write call.
521 *****************************************************************************/
523 NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
524 struct smb_request *smbreq,
530 struct aio_extra *aio_ex = NULL;
531 SMB_STRUCT_AIOCB *a = NULL;
532 size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
535 /* Ensure aio is initialized. */
536 if (!initialize_async_io_handler()) {
537 return NT_STATUS_RETRY;
540 if (fsp->base_fsp != NULL) {
541 /* No AIO on streams yet */
542 DEBUG(10, ("AIO on streams not yet supported\n"));
543 return NT_STATUS_RETRY;
546 if ((!min_aio_write_size || (in_data.length < min_aio_write_size))
547 && !SMB_VFS_AIO_FORCE(fsp)) {
548 /* Too small a write for aio request. */
549 DEBUG(10,("smb2: write size (%u) too "
550 "small for minimum aio_write of %u\n",
551 (unsigned int)in_data.length,
552 (unsigned int)min_aio_write_size ));
553 return NT_STATUS_RETRY;
556 /* Only do this on writes not using the write cache. */
557 if (lp_write_cache_size(SNUM(conn)) != 0) {
558 return NT_STATUS_RETRY;
561 if (outstanding_aio_calls >= aio_pending_size) {
562 DEBUG(3,("smb2: Already have %d aio "
563 "activities outstanding.\n",
564 outstanding_aio_calls ));
565 return NT_STATUS_RETRY;
568 if (!(aio_ex = create_aio_extra(smbreq->smb2req, fsp, 0))) {
569 return NT_STATUS_NO_MEMORY;
572 aio_ex->handle_completion = handle_aio_smb2_write_complete;
573 aio_ex->write_through = write_through;
574 aio_ex->pass_cancel = true;
576 init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
577 in_offset, (uint64_t)in_data.length, WRITE_LOCK,
580 /* Take the lock until the AIO completes. */
581 if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
583 return NT_STATUS_FILE_LOCK_CONFLICT;
588 /* Now set up the aio record for the write call. */
590 a->aio_fildes = fsp->fh->fd;
591 a->aio_buf = in_data.data;
592 a->aio_nbytes = in_data.length;
593 a->aio_offset = in_offset;
594 a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
595 a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
596 a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
598 ret = SMB_VFS_AIO_WRITE(fsp, a);
600 DEBUG(3,("smb2: aio_write failed. "
601 "Error %s\n", strerror(errno) ));
602 SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
604 return NT_STATUS_RETRY;
607 outstanding_aio_calls++;
608 /* We don't need talloc_move here as both aio_ex and
609 * smbreq are children of smbreq->smb2req. */
610 aio_ex->smbreq = smbreq;
611 smbreq->async_priv = aio_ex;
613 /* This should actually be improved to span the write. */
614 contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
615 contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
618 * We don't want to do write behind due to ownership
619 * issues of the request structs. Maybe add it if I
620 * figure those out. JRA.
623 DEBUG(10,("smb2: scheduled aio_write for file "
624 "%s, offset %.0f, len = %u (mid = %u) "
625 "outstanding_aio_calls = %d\n",
628 (unsigned int)in_data.length,
629 (unsigned int)aio_ex->smbreq->mid,
630 outstanding_aio_calls ));
635 /****************************************************************************
636 Complete the read and return the data or error back to the client.
637 Returns errno or zero if all ok.
638 *****************************************************************************/
640 static int handle_aio_read_complete(struct aio_extra *aio_ex, int errcode)
643 char *outbuf = (char *)aio_ex->outbuf.data;
644 char *data = smb_buf(outbuf);
645 ssize_t nread = SMB_VFS_AIO_RETURN(aio_ex->fsp,&aio_ex->acb);
648 /* We're relying here on the fact that if the fd is
649 closed then the aio will complete and aio_return
650 will return an error. Hopefully this is
653 DEBUG( 3,( "handle_aio_read_complete: file %s nread == %d. "
655 fsp_str_dbg(aio_ex->fsp), (int)nread, strerror(errcode)));
657 ERROR_NT(map_nt_error_from_unix(errcode));
658 outsize = srv_set_message(outbuf,0,0,true);
660 outsize = srv_set_message(outbuf,12,nread,False);
661 SSVAL(outbuf,smb_vwv2,0xFFFF); /* Remaining - must be * -1. */
662 SSVAL(outbuf,smb_vwv5,nread);
663 SSVAL(outbuf,smb_vwv6,smb_offset(data,outbuf));
664 SSVAL(outbuf,smb_vwv7,((nread >> 16) & 1));
665 SSVAL(smb_buf(outbuf),-2,nread);
667 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nread;
668 aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
670 DEBUG( 3, ( "handle_aio_read_complete file %s max=%d "
672 fsp_str_dbg(aio_ex->fsp),
673 (int)aio_ex->acb.aio_nbytes, (int)nread ) );
676 smb_setlen(outbuf,outsize - 4);
678 if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
679 true, aio_ex->smbreq->seqnum+1,
680 IS_CONN_ENCRYPTED(aio_ex->fsp->conn), NULL)) {
681 exit_server_cleanly("handle_aio_read_complete: srv_send_smb "
685 DEBUG(10,("handle_aio_read_complete: scheduled aio_read completed "
686 "for file %s, offset %.0f, len = %u\n",
687 fsp_str_dbg(aio_ex->fsp), (double)aio_ex->acb.aio_offset,
688 (unsigned int)nread ));
693 /****************************************************************************
694 Complete the write and return the data or error back to the client.
695 Returns error code or zero if all ok.
696 *****************************************************************************/
698 static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode)
700 files_struct *fsp = aio_ex->fsp;
701 char *outbuf = (char *)aio_ex->outbuf.data;
702 ssize_t numtowrite = aio_ex->acb.aio_nbytes;
703 ssize_t nwritten = SMB_VFS_AIO_RETURN(fsp,&aio_ex->acb);
705 if (fsp->aio_write_behind) {
706 if (nwritten != numtowrite) {
707 if (nwritten == -1) {
708 DEBUG(5,("handle_aio_write_complete: "
709 "aio_write_behind failed ! File %s "
710 "is corrupt ! Error %s\n",
711 fsp_str_dbg(fsp), strerror(errcode)));
713 DEBUG(0,("handle_aio_write_complete: "
714 "aio_write_behind failed ! File %s "
715 "is corrupt ! Wanted %u bytes but "
716 "only wrote %d\n", fsp_str_dbg(fsp),
717 (unsigned int)numtowrite,
722 DEBUG(10,("handle_aio_write_complete: "
723 "aio_write_behind completed for file %s\n",
726 /* TODO: should no return 0 in case of an error !!! */
730 /* We don't need outsize or set_message here as we've already set the
731 fixed size length when we set up the aio call. */
734 DEBUG( 3,( "handle_aio_write: file %s wanted %u bytes. "
735 "nwritten == %d. Error = %s\n",
736 fsp_str_dbg(fsp), (unsigned int)numtowrite,
737 (int)nwritten, strerror(errcode) ));
739 ERROR_NT(map_nt_error_from_unix(errcode));
740 srv_set_message(outbuf,0,0,true);
744 SSVAL(outbuf,smb_vwv2,nwritten);
745 SSVAL(outbuf,smb_vwv4,(nwritten>>16)&1);
746 if (nwritten < (ssize_t)numtowrite) {
747 SCVAL(outbuf,smb_rcls,ERRHRD);
748 SSVAL(outbuf,smb_err,ERRdiskfull);
751 DEBUG(3,("handle_aio_write: fnum=%d num=%d wrote=%d\n",
752 fsp->fnum, (int)numtowrite, (int)nwritten));
753 status = sync_file(fsp->conn,fsp, aio_ex->write_through);
754 if (!NT_STATUS_IS_OK(status)) {
756 ERROR_BOTH(map_nt_error_from_unix(errcode),
757 ERRHRD, ERRdiskfull);
758 srv_set_message(outbuf,0,0,true);
759 DEBUG(5,("handle_aio_write: sync_file for %s returned %s\n",
760 fsp_str_dbg(fsp), nt_errstr(status)));
763 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nwritten;
767 if (!srv_send_smb(aio_ex->smbreq->sconn, outbuf,
768 true, aio_ex->smbreq->seqnum+1,
769 IS_CONN_ENCRYPTED(fsp->conn),
771 exit_server_cleanly("handle_aio_write_complete: "
772 "srv_send_smb failed.");
775 DEBUG(10,("handle_aio_write_complete: scheduled aio_write completed "
776 "for file %s, offset %.0f, requested %u, written = %u\n",
777 fsp_str_dbg(fsp), (double)aio_ex->acb.aio_offset,
778 (unsigned int)numtowrite, (unsigned int)nwritten ));
783 /****************************************************************************
784 Complete the read and return the data or error back to the client.
785 Returns errno or zero if all ok.
786 *****************************************************************************/
788 static int handle_aio_smb2_read_complete(struct aio_extra *aio_ex, int errcode)
791 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
792 ssize_t nread = SMB_VFS_AIO_RETURN(aio_ex->fsp,&aio_ex->acb);
794 /* Common error or success code processing for async or sync
797 status = smb2_read_complete(subreq, nread, errcode);
800 aio_ex->fsp->fh->pos = aio_ex->acb.aio_offset + nread;
801 aio_ex->fsp->fh->position_information = aio_ex->fsp->fh->pos;
804 DEBUG(10,("smb2: scheduled aio_read completed "
805 "for file %s, offset %.0f, len = %u "
806 "(errcode = %d, NTSTATUS = %s)\n",
807 fsp_str_dbg(aio_ex->fsp),
808 (double)aio_ex->acb.aio_offset,
811 nt_errstr(status) ));
813 if (!NT_STATUS_IS_OK(status)) {
814 tevent_req_nterror(subreq, status);
818 tevent_req_done(subreq);
822 /****************************************************************************
823 Complete the SMB2 write and return the data or error back to the client.
824 Returns error code or zero if all ok.
825 *****************************************************************************/
827 static int handle_aio_smb2_write_complete(struct aio_extra *aio_ex, int errcode)
829 files_struct *fsp = aio_ex->fsp;
830 ssize_t numtowrite = aio_ex->acb.aio_nbytes;
831 ssize_t nwritten = SMB_VFS_AIO_RETURN(fsp,&aio_ex->acb);
832 struct tevent_req *subreq = aio_ex->smbreq->smb2req->subreq;
835 status = smb2_write_complete(subreq, nwritten, errcode);
837 DEBUG(10,("smb2: scheduled aio_write completed "
838 "for file %s, offset %.0f, requested %u, "
839 "written = %u (errcode = %d, NTSTATUS = %s)\n",
841 (double)aio_ex->acb.aio_offset,
842 (unsigned int)numtowrite,
843 (unsigned int)nwritten,
845 nt_errstr(status) ));
847 if (!NT_STATUS_IS_OK(status)) {
848 tevent_req_nterror(subreq, status);
852 tevent_req_done(subreq);
856 /****************************************************************************
857 Handle any aio completion. Returns True if finished (and sets *perr if err
858 was non-zero), False if not.
859 *****************************************************************************/
861 static bool handle_aio_completed(struct aio_extra *aio_ex, int *perr)
863 files_struct *fsp = NULL;
867 DEBUG(3, ("handle_aio_completed: Non-existing aio_ex passed\n"));
872 DEBUG(3, ("handle_aio_completed: aio_ex->fsp == NULL\n"));
878 /* Ensure the operation has really completed. */
879 err = SMB_VFS_AIO_ERROR(fsp, &aio_ex->acb);
880 if (err == EINPROGRESS) {
881 DEBUG(10,( "handle_aio_completed: operation mid %llu still in "
882 "process for file %s\n",
883 (unsigned long long)aio_ex->smbreq->mid,
884 fsp_str_dbg(aio_ex->fsp)));
888 /* Unlock now we're done. */
889 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
891 if (!aio_ex->pass_cancel && err == ECANCELED) {
892 /* If error is ECANCELED then don't return anything to the
894 DEBUG(10,( "handle_aio_completed: operation mid %llu"
896 (unsigned long long)aio_ex->smbreq->mid));
900 err = aio_ex->handle_completion(aio_ex, err);
902 *perr = err; /* Only save non-zero errors. */
908 /****************************************************************************
909 Handle any aio completion inline.
910 *****************************************************************************/
912 void smbd_aio_complete_aio_ex(struct aio_extra *aio_ex)
914 files_struct *fsp = NULL;
917 outstanding_aio_calls--;
919 DEBUG(10,("smbd_aio_complete_mid: mid[%llu]\n",
920 (unsigned long long)aio_ex->smbreq->mid));
924 /* file was closed whilst I/O was outstanding. Just
926 DEBUG( 3,( "smbd_aio_complete_mid: file closed whilst "
927 "aio outstanding (mid[%llu]).\n",
928 (unsigned long long)aio_ex->smbreq->mid));
932 if (!handle_aio_completed(aio_ex, &ret)) {
937 /****************************************************************************
938 We're doing write behind and the client closed the file. Wait up to 30
939 seconds (my arbitrary choice) for the aio to complete. Return 0 if all writes
940 completed, errno to return if not.
941 *****************************************************************************/
943 #define SMB_TIME_FOR_AIO_COMPLETE_WAIT 29
945 int wait_for_aio_completion(files_struct *fsp)
947 struct aio_extra *aio_ex;
948 const SMB_STRUCT_AIOCB **aiocb_list;
949 int aio_completion_count = 0;
950 time_t start_time = time_mono(NULL);
953 for (seconds_left = SMB_TIME_FOR_AIO_COMPLETE_WAIT;
954 seconds_left >= 0;) {
959 aio_completion_count = 0;
960 for( aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) {
961 if (aio_ex->fsp == fsp) {
962 aio_completion_count++;
966 if (!aio_completion_count) {
970 DEBUG(3,("wait_for_aio_completion: waiting for %d aio events "
971 "to complete.\n", aio_completion_count ));
973 aiocb_list = SMB_MALLOC_ARRAY(const SMB_STRUCT_AIOCB *,
974 aio_completion_count);
979 for( i = 0, aio_ex = aio_list_head;
981 aio_ex = aio_ex->next) {
982 if (aio_ex->fsp == fsp) {
983 aiocb_list[i++] = &aio_ex->acb;
987 /* Now wait up to seconds_left for completion. */
988 ts.tv_sec = seconds_left;
991 DEBUG(10,("wait_for_aio_completion: %d events, doing a wait "
993 aio_completion_count, seconds_left ));
995 err = SMB_VFS_AIO_SUSPEND(fsp, aiocb_list,
996 aio_completion_count, &ts);
998 DEBUG(10,("wait_for_aio_completion: returned err = %d, "
999 "errno = %s\n", err, strerror(errno) ));
1001 if (err == -1 && errno == EAGAIN) {
1002 DEBUG(0,("wait_for_aio_completion: aio_suspend timed "
1003 "out waiting for %d events after a wait of "
1004 "%d seconds\n", aio_completion_count,
1007 cancel_aio_by_fsp(fsp);
1008 SAFE_FREE(aiocb_list);
1012 /* One or more events might have completed - process them if
1014 for( i = 0; i < aio_completion_count; i++) {
1015 aio_ex = (struct aio_extra *)aiocb_list[i]->aio_sigevent.sigev_value.sival_ptr;
1017 if (!handle_aio_completed(aio_ex, &err)) {
1020 TALLOC_FREE(aio_ex);
1023 SAFE_FREE(aiocb_list);
1024 seconds_left = SMB_TIME_FOR_AIO_COMPLETE_WAIT
1025 - (time_mono(NULL) - start_time);
1028 /* We timed out - we don't know why. Return ret if already an error,
1030 DEBUG(10,("wait_for_aio_completion: aio_suspend timed out waiting "
1032 aio_completion_count));
1037 /****************************************************************************
1038 Cancel any outstanding aio requests. The client doesn't care about the reply.
1039 *****************************************************************************/
1041 void cancel_aio_by_fsp(files_struct *fsp)
1043 struct aio_extra *aio_ex;
1045 for( aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) {
1046 if (aio_ex->fsp == fsp) {
1047 /* Unlock now we're done. */
1048 SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
1050 /* Don't delete the aio_extra record as we may have
1051 completed and don't yet know it. Just do the
1052 aio_cancel call and return. */
1053 SMB_VFS_AIO_CANCEL(fsp, &aio_ex->acb);
1054 aio_ex->fsp = NULL; /* fsp will be closed when we
1061 NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
1062 struct smb_request *smbreq,
1063 files_struct *fsp, SMB_OFF_T startpos,
1066 return NT_STATUS_RETRY;
1069 NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
1070 struct smb_request *smbreq,
1071 files_struct *fsp, const char *data,
1075 return NT_STATUS_RETRY;
1078 bool cancel_smb2_aio(struct smb_request *smbreq)
1083 NTSTATUS schedule_smb2_aio_read(connection_struct *conn,
1084 struct smb_request *smbreq,
1087 DATA_BLOB *preadbuf,
1091 return NT_STATUS_RETRY;
1094 NTSTATUS schedule_aio_smb2_write(connection_struct *conn,
1095 struct smb_request *smbreq,
1101 return NT_STATUS_RETRY;
1104 void cancel_aio_by_fsp(files_struct *fsp)
1108 int wait_for_aio_completion(files_struct *fsp)
1113 void smbd_aio_complete_mid(uint64_t mid);