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/>.
25 /* The signal we'll use to signify aio done. */
27 #define RT_SIGNAL_AIO (SIGRTMIN+3)
30 /****************************************************************************
31 The buffer we keep around whilst an aio request is in process.
32 *****************************************************************************/
35 struct aio_extra
*next
, *prev
;
44 static struct aio_extra
*aio_list_head
;
46 /****************************************************************************
47 Create the extended aio struct we must keep around for the lifetime
49 *****************************************************************************/
51 static struct aio_extra
*create_aio_ex_read(files_struct
*fsp
, size_t buflen
,
54 struct aio_extra
*aio_ex
= SMB_MALLOC_P(struct aio_extra
);
60 /* The output buffer stored in the aio_ex is the start of
61 the smb return buffer. The buffer used in the acb
62 is the start of the reply data portion of that buffer. */
63 aio_ex
->outbuf
= SMB_MALLOC_ARRAY(char, buflen
);
64 if (!aio_ex
->outbuf
) {
68 DLIST_ADD(aio_list_head
, aio_ex
);
70 aio_ex
->read_req
= True
;
75 /****************************************************************************
76 Create the extended aio struct we must keep around for the lifetime
77 of the aio_write call.
78 *****************************************************************************/
80 static struct aio_extra
*create_aio_ex_write(files_struct
*fsp
,
85 struct aio_extra
*aio_ex
= SMB_MALLOC_P(struct aio_extra
);
92 /* We need space for an output reply of outbuflen bytes. */
93 aio_ex
->outbuf
= SMB_MALLOC_ARRAY(char, outbuflen
);
94 if (!aio_ex
->outbuf
) {
99 if (!(aio_ex
->inbuf
= SMB_MALLOC_ARRAY(char, inbuflen
))) {
100 SAFE_FREE(aio_ex
->outbuf
);
105 DLIST_ADD(aio_list_head
, aio_ex
);
107 aio_ex
->read_req
= False
;
112 /****************************************************************************
113 Delete the extended aio struct.
114 *****************************************************************************/
116 static void delete_aio_ex(struct aio_extra
*aio_ex
)
118 DLIST_REMOVE(aio_list_head
, aio_ex
);
119 SAFE_FREE(aio_ex
->inbuf
);
120 SAFE_FREE(aio_ex
->outbuf
);
124 /****************************************************************************
125 Given the aiocb struct find the extended aio struct containing it.
126 *****************************************************************************/
128 static struct aio_extra
*find_aio_ex(uint16 mid
)
132 for( p
= aio_list_head
; p
; p
= p
->next
) {
140 /****************************************************************************
141 We can have these many aio buffers in flight.
142 *****************************************************************************/
144 static int aio_pending_size
;
145 static sig_atomic_t signals_received
;
146 static int outstanding_aio_calls
;
147 static uint16
*aio_pending_array
;
149 /****************************************************************************
150 Signal handler when an aio request completes.
151 *****************************************************************************/
153 void aio_request_done(uint16_t mid
)
155 if (signals_received
< aio_pending_size
) {
156 aio_pending_array
[signals_received
] = mid
;
159 /* Else signal is lost. */
162 static void signal_handler(int sig
, siginfo_t
*info
, void *unused
)
164 aio_request_done(info
->si_value
.sival_int
);
165 sys_select_signal(RT_SIGNAL_AIO
);
168 /****************************************************************************
169 Is there a signal waiting ?
170 *****************************************************************************/
172 bool aio_finished(void)
174 return (signals_received
!= 0);
177 /****************************************************************************
178 Initialize the signal handler for aio read/write.
179 *****************************************************************************/
181 void initialize_async_io_handler(void)
183 struct sigaction act
;
185 aio_pending_size
= lp_maxmux();
186 aio_pending_array
= SMB_MALLOC_ARRAY(uint16
, aio_pending_size
);
187 SMB_ASSERT(aio_pending_array
!= NULL
);
190 act
.sa_sigaction
= signal_handler
;
191 act
.sa_flags
= SA_SIGINFO
;
192 sigemptyset( &act
.sa_mask
);
193 if (sigaction(RT_SIGNAL_AIO
, &act
, NULL
) != 0) {
194 DEBUG(0,("Failed to setup RT_SIGNAL_AIO handler\n"));
197 /* the signal can start off blocked due to a bug in bash */
198 BlockSignals(False
, RT_SIGNAL_AIO
);
201 /****************************************************************************
202 Set up an aio request from a SMBreadX call.
203 *****************************************************************************/
205 bool schedule_aio_read_and_X(connection_struct
*conn
,
206 struct smb_request
*req
,
207 files_struct
*fsp
, SMB_OFF_T startpos
,
210 struct aio_extra
*aio_ex
;
213 size_t min_aio_read_size
= lp_aio_read_size(SNUM(conn
));
215 if (fsp
->base_fsp
!= NULL
) {
216 /* No AIO on streams yet */
217 DEBUG(10, ("AIO on streams not yet supported\n"));
221 if ((!min_aio_read_size
|| (smb_maxcnt
< min_aio_read_size
))
222 && !SMB_VFS_AIO_FORCE(fsp
)) {
223 /* Too small a read for aio request. */
224 DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
225 "for minimum aio_read of %u\n",
226 (unsigned int)smb_maxcnt
,
227 (unsigned int)min_aio_read_size
));
231 /* Only do this on non-chained and non-chaining reads not using the
233 if (chain_size
!=0 || (CVAL(req
->inbuf
,smb_vwv0
) != 0xFF)
234 || (lp_write_cache_size(SNUM(conn
)) != 0) ) {
238 if (outstanding_aio_calls
>= aio_pending_size
) {
239 DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
240 "activities outstanding.\n",
241 outstanding_aio_calls
));
245 /* The following is safe from integer wrap as we've already checked
246 smb_maxcnt is 128k or less. Wct is 12 for read replies */
248 bufsize
= smb_size
+ 12 * 2 + smb_maxcnt
;
250 if ((aio_ex
= create_aio_ex_read(fsp
, bufsize
, req
->mid
)) == NULL
) {
251 DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
255 construct_reply_common((char *)req
->inbuf
, aio_ex
->outbuf
);
256 srv_set_message(aio_ex
->outbuf
, 12, 0, True
);
257 SCVAL(aio_ex
->outbuf
,smb_vwv0
,0xFF); /* Never a chained reply. */
261 /* Now set up the aio record for the read call. */
263 a
->aio_fildes
= fsp
->fh
->fd
;
264 a
->aio_buf
= smb_buf(aio_ex
->outbuf
);
265 a
->aio_nbytes
= smb_maxcnt
;
266 a
->aio_offset
= startpos
;
267 a
->aio_sigevent
.sigev_notify
= SIGEV_SIGNAL
;
268 a
->aio_sigevent
.sigev_signo
= RT_SIGNAL_AIO
;
269 a
->aio_sigevent
.sigev_value
.sival_int
= aio_ex
->mid
;
272 if (SMB_VFS_AIO_READ(fsp
,a
) == -1) {
273 DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
274 "Error %s\n", strerror(errno
) ));
275 delete_aio_ex(aio_ex
);
281 DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
282 "offset %.0f, len = %u (mid = %u)\n",
283 fsp
->fsp_name
, (double)startpos
, (unsigned int)smb_maxcnt
,
284 (unsigned int)aio_ex
->mid
));
286 srv_defer_sign_response(aio_ex
->mid
);
287 outstanding_aio_calls
++;
291 /****************************************************************************
292 Set up an aio request from a SMBwriteX call.
293 *****************************************************************************/
295 bool schedule_aio_write_and_X(connection_struct
*conn
,
296 struct smb_request
*req
,
297 files_struct
*fsp
, char *data
,
301 struct aio_extra
*aio_ex
;
303 size_t inbufsize
, outbufsize
;
304 bool write_through
= BITSETW(req
->inbuf
+smb_vwv7
,0);
305 size_t min_aio_write_size
= lp_aio_write_size(SNUM(conn
));
307 if (fsp
->base_fsp
!= NULL
) {
308 /* No AIO on streams yet */
309 DEBUG(10, ("AIO on streams not yet supported\n"));
313 if ((!min_aio_write_size
|| (numtowrite
< min_aio_write_size
))
314 && !SMB_VFS_AIO_FORCE(fsp
)) {
315 /* Too small a write for aio request. */
316 DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
317 "small for minimum aio_write of %u\n",
318 (unsigned int)numtowrite
,
319 (unsigned int)min_aio_write_size
));
323 /* Only do this on non-chained and non-chaining reads not using the
325 if (chain_size
!=0 || (CVAL(req
->inbuf
,smb_vwv0
) != 0xFF)
326 || (lp_write_cache_size(SNUM(conn
)) != 0) ) {
330 if (outstanding_aio_calls
>= aio_pending_size
) {
331 DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
332 "activities outstanding.\n",
333 outstanding_aio_calls
));
334 DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
335 "aio_write for file %s, offset %.0f, len = %u "
337 fsp
->fsp_name
, (double)startpos
,
338 (unsigned int)numtowrite
,
339 (unsigned int)req
->mid
));
343 inbufsize
= smb_len(req
->inbuf
) + 4;
344 reply_outbuf(req
, 6, 0);
345 outbufsize
= smb_len(req
->outbuf
) + 4;
346 if (!(aio_ex
= create_aio_ex_write(fsp
, inbufsize
, outbufsize
,
348 DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
352 /* Copy the SMB header already setup in outbuf. */
353 memcpy(aio_ex
->inbuf
, req
->inbuf
, inbufsize
);
355 /* Copy the SMB header already setup in outbuf. */
356 memcpy(aio_ex
->outbuf
, req
->outbuf
, outbufsize
);
357 TALLOC_FREE(req
->outbuf
);
358 SCVAL(aio_ex
->outbuf
,smb_vwv0
,0xFF); /* Never a chained reply. */
362 /* Now set up the aio record for the write call. */
364 a
->aio_fildes
= fsp
->fh
->fd
;
365 a
->aio_buf
= aio_ex
->inbuf
+ (PTR_DIFF(data
, req
->inbuf
));
366 a
->aio_nbytes
= numtowrite
;
367 a
->aio_offset
= startpos
;
368 a
->aio_sigevent
.sigev_notify
= SIGEV_SIGNAL
;
369 a
->aio_sigevent
.sigev_signo
= RT_SIGNAL_AIO
;
370 a
->aio_sigevent
.sigev_value
.sival_int
= aio_ex
->mid
;
373 if (SMB_VFS_AIO_WRITE(fsp
,a
) == -1) {
374 DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
375 "Error %s\n", strerror(errno
) ));
376 delete_aio_ex(aio_ex
);
382 release_level_2_oplocks_on_change(fsp
);
384 if (!write_through
&& !lp_syncalways(SNUM(fsp
->conn
))
385 && fsp
->aio_write_behind
) {
386 /* Lie to the client and immediately claim we finished the
388 SSVAL(aio_ex
->outbuf
,smb_vwv2
,numtowrite
);
389 SSVAL(aio_ex
->outbuf
,smb_vwv4
,(numtowrite
>>16)&1);
390 show_msg(aio_ex
->outbuf
);
391 if (!srv_send_smb(smbd_server_fd(),aio_ex
->outbuf
,
392 IS_CONN_ENCRYPTED(fsp
->conn
))) {
393 exit_server_cleanly("handle_aio_write: srv_send_smb "
396 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
397 "behind for file %s\n", fsp
->fsp_name
));
399 srv_defer_sign_response(aio_ex
->mid
);
401 outstanding_aio_calls
++;
403 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write for file "
404 "%s, offset %.0f, len = %u (mid = %u) "
405 "outstanding_aio_calls = %d\n",
406 fsp
->fsp_name
, (double)startpos
, (unsigned int)numtowrite
,
407 (unsigned int)aio_ex
->mid
, outstanding_aio_calls
));
413 /****************************************************************************
414 Complete the read and return the data or error back to the client.
415 Returns errno or zero if all ok.
416 *****************************************************************************/
418 static int handle_aio_read_complete(struct aio_extra
*aio_ex
)
422 char *outbuf
= aio_ex
->outbuf
;
423 char *data
= smb_buf(outbuf
);
424 ssize_t nread
= SMB_VFS_AIO_RETURN(aio_ex
->fsp
,&aio_ex
->acb
);
427 /* We're relying here on the fact that if the fd is
428 closed then the aio will complete and aio_return
429 will return an error. Hopefully this is
432 /* If errno is ECANCELED then don't return anything to the
434 if (errno
== ECANCELED
) {
435 srv_cancel_sign_response(aio_ex
->mid
);
439 DEBUG( 3,( "handle_aio_read_complete: file %s nread == -1. "
441 aio_ex
->fsp
->fsp_name
, strerror(errno
) ));
444 ERROR_NT(map_nt_error_from_unix(ret
));
445 outsize
= srv_set_message(outbuf
,0,0,true);
447 outsize
= srv_set_message(outbuf
,12,nread
,False
);
448 SSVAL(outbuf
,smb_vwv2
,0xFFFF); /* Remaining - must be * -1. */
449 SSVAL(outbuf
,smb_vwv5
,nread
);
450 SSVAL(outbuf
,smb_vwv6
,smb_offset(data
,outbuf
));
451 SSVAL(outbuf
,smb_vwv7
,((nread
>> 16) & 1));
452 SSVAL(smb_buf(outbuf
),-2,nread
);
454 aio_ex
->fsp
->fh
->pos
= aio_ex
->acb
.aio_offset
+ nread
;
455 aio_ex
->fsp
->fh
->position_information
= aio_ex
->fsp
->fh
->pos
;
457 DEBUG( 3, ( "handle_aio_read_complete file %s max=%d "
459 aio_ex
->fsp
->fsp_name
,
460 (int)aio_ex
->acb
.aio_nbytes
, (int)nread
) );
463 smb_setlen(outbuf
,outsize
- 4);
465 if (!srv_send_smb(smbd_server_fd(),outbuf
,
466 IS_CONN_ENCRYPTED(aio_ex
->fsp
->conn
))) {
467 exit_server_cleanly("handle_aio_read_complete: srv_send_smb "
471 DEBUG(10,("handle_aio_read_complete: scheduled aio_read completed "
472 "for file %s, offset %.0f, len = %u\n",
473 aio_ex
->fsp
->fsp_name
, (double)aio_ex
->acb
.aio_offset
,
474 (unsigned int)nread
));
479 /****************************************************************************
480 Complete the write and return the data or error back to the client.
481 Returns errno or zero if all ok.
482 *****************************************************************************/
484 static int handle_aio_write_complete(struct aio_extra
*aio_ex
)
487 files_struct
*fsp
= aio_ex
->fsp
;
488 char *outbuf
= aio_ex
->outbuf
;
489 ssize_t numtowrite
= aio_ex
->acb
.aio_nbytes
;
490 ssize_t nwritten
= SMB_VFS_AIO_RETURN(fsp
,&aio_ex
->acb
);
492 if (fsp
->aio_write_behind
) {
493 if (nwritten
!= numtowrite
) {
494 if (nwritten
== -1) {
495 DEBUG(5,("handle_aio_write_complete: "
496 "aio_write_behind failed ! File %s "
497 "is corrupt ! Error %s\n",
498 fsp
->fsp_name
, strerror(errno
) ));
501 DEBUG(0,("handle_aio_write_complete: "
502 "aio_write_behind failed ! File %s "
503 "is corrupt ! Wanted %u bytes but "
504 "only wrote %d\n", fsp
->fsp_name
,
505 (unsigned int)numtowrite
,
510 DEBUG(10,("handle_aio_write_complete: "
511 "aio_write_behind completed for file %s\n",
517 /* We don't need outsize or set_message here as we've already set the
518 fixed size length when we set up the aio call. */
521 DEBUG( 3,( "handle_aio_write: file %s wanted %u bytes. "
522 "nwritten == %d. Error = %s\n",
523 fsp
->fsp_name
, (unsigned int)numtowrite
,
524 (int)nwritten
, strerror(errno
) ));
526 /* If errno is ECANCELED then don't return anything to the
528 if (errno
== ECANCELED
) {
529 srv_cancel_sign_response(aio_ex
->mid
);
534 ERROR_BOTH(map_nt_error_from_unix(ret
), ERRHRD
, ERRdiskfull
);
535 srv_set_message(outbuf
,0,0,true);
537 bool write_through
= BITSETW(aio_ex
->inbuf
+smb_vwv7
,0);
540 SSVAL(outbuf
,smb_vwv2
,nwritten
);
541 SSVAL(outbuf
,smb_vwv4
,(nwritten
>>16)&1);
542 if (nwritten
< (ssize_t
)numtowrite
) {
543 SCVAL(outbuf
,smb_rcls
,ERRHRD
);
544 SSVAL(outbuf
,smb_err
,ERRdiskfull
);
547 DEBUG(3,("handle_aio_write: fnum=%d num=%d wrote=%d\n",
548 fsp
->fnum
, (int)numtowrite
, (int)nwritten
));
549 status
= sync_file(fsp
->conn
,fsp
, write_through
);
550 if (!NT_STATUS_IS_OK(status
)) {
552 ERROR_BOTH(map_nt_error_from_unix(ret
),
553 ERRHRD
, ERRdiskfull
);
554 srv_set_message(outbuf
,0,0,true);
555 DEBUG(5,("handle_aio_write: sync_file for %s returned %s\n",
556 fsp
->fsp_name
, nt_errstr(status
) ));
559 aio_ex
->fsp
->fh
->pos
= aio_ex
->acb
.aio_offset
+ nwritten
;
563 if (!srv_send_smb(smbd_server_fd(),outbuf
,IS_CONN_ENCRYPTED(fsp
->conn
))) {
564 exit_server_cleanly("handle_aio_write: srv_send_smb failed.");
567 DEBUG(10,("handle_aio_write_complete: scheduled aio_write completed "
568 "for file %s, offset %.0f, requested %u, written = %u\n",
569 fsp
->fsp_name
, (double)aio_ex
->acb
.aio_offset
,
570 (unsigned int)numtowrite
, (unsigned int)nwritten
));
575 /****************************************************************************
576 Handle any aio completion. Returns True if finished (and sets *perr if err
577 was non-zero), False if not.
578 *****************************************************************************/
580 static bool handle_aio_completed(struct aio_extra
*aio_ex
, int *perr
)
584 /* Ensure the operation has really completed. */
585 if (SMB_VFS_AIO_ERROR(aio_ex
->fsp
, &aio_ex
->acb
) == EINPROGRESS
) {
586 DEBUG(10,( "handle_aio_completed: operation mid %u still in "
587 "process for file %s\n",
588 aio_ex
->mid
, aio_ex
->fsp
->fsp_name
));
592 if (aio_ex
->read_req
) {
593 err
= handle_aio_read_complete(aio_ex
);
595 err
= handle_aio_write_complete(aio_ex
);
599 *perr
= err
; /* Only save non-zero errors. */
605 /****************************************************************************
606 Handle any aio completion inline.
607 Returns non-zero errno if fail or zero if all ok.
608 *****************************************************************************/
610 int process_aio_queue(void)
615 BlockSignals(True
, RT_SIGNAL_AIO
);
617 DEBUG(10,("process_aio_queue: signals_received = %d\n",
618 (int)signals_received
));
619 DEBUG(10,("process_aio_queue: outstanding_aio_calls = %d\n",
620 outstanding_aio_calls
));
622 if (!signals_received
) {
623 BlockSignals(False
, RT_SIGNAL_AIO
);
627 /* Drain all the complete aio_reads. */
628 for (i
= 0; i
< signals_received
; i
++) {
629 uint16 mid
= aio_pending_array
[i
];
630 files_struct
*fsp
= NULL
;
631 struct aio_extra
*aio_ex
= find_aio_ex(mid
);
634 DEBUG(3,("process_aio_queue: Can't find record to "
635 "match mid %u.\n", (unsigned int)mid
));
636 srv_cancel_sign_response(mid
);
642 /* file was closed whilst I/O was outstanding. Just
644 DEBUG( 3,( "process_aio_queue: file closed whilst "
645 "aio outstanding.\n"));
646 srv_cancel_sign_response(mid
);
650 if (!handle_aio_completed(aio_ex
, &ret
)) {
654 delete_aio_ex(aio_ex
);
657 outstanding_aio_calls
-= signals_received
;
658 signals_received
= 0;
659 BlockSignals(False
, RT_SIGNAL_AIO
);
663 /****************************************************************************
664 We're doing write behind and the client closed the file. Wait up to 30
665 seconds (my arbitrary choice) for the aio to complete. Return 0 if all writes
666 completed, errno to return if not.
667 *****************************************************************************/
669 #define SMB_TIME_FOR_AIO_COMPLETE_WAIT 29
671 int wait_for_aio_completion(files_struct
*fsp
)
673 struct aio_extra
*aio_ex
;
674 const SMB_STRUCT_AIOCB
**aiocb_list
;
675 int aio_completion_count
= 0;
676 time_t start_time
= time(NULL
);
679 for (seconds_left
= SMB_TIME_FOR_AIO_COMPLETE_WAIT
;
680 seconds_left
>= 0;) {
685 aio_completion_count
= 0;
686 for( aio_ex
= aio_list_head
; aio_ex
; aio_ex
= aio_ex
->next
) {
687 if (aio_ex
->fsp
== fsp
) {
688 aio_completion_count
++;
692 if (!aio_completion_count
) {
696 DEBUG(3,("wait_for_aio_completion: waiting for %d aio events "
697 "to complete.\n", aio_completion_count
));
699 aiocb_list
= SMB_MALLOC_ARRAY(const SMB_STRUCT_AIOCB
*,
700 aio_completion_count
);
705 for( i
= 0, aio_ex
= aio_list_head
;
707 aio_ex
= aio_ex
->next
) {
708 if (aio_ex
->fsp
== fsp
) {
709 aiocb_list
[i
++] = &aio_ex
->acb
;
713 /* Now wait up to seconds_left for completion. */
714 ts
.tv_sec
= seconds_left
;
717 DEBUG(10,("wait_for_aio_completion: %d events, doing a wait "
719 aio_completion_count
, seconds_left
));
721 err
= SMB_VFS_AIO_SUSPEND(fsp
, aiocb_list
,
722 aio_completion_count
, &ts
);
724 DEBUG(10,("wait_for_aio_completion: returned err = %d, "
725 "errno = %s\n", err
, strerror(errno
) ));
727 if (err
== -1 && errno
== EAGAIN
) {
728 DEBUG(0,("wait_for_aio_completion: aio_suspend timed "
729 "out waiting for %d events after a wait of "
730 "%d seconds\n", aio_completion_count
,
733 cancel_aio_by_fsp(fsp
);
734 SAFE_FREE(aiocb_list
);
738 /* One or more events might have completed - process them if
740 for( i
= 0; i
< aio_completion_count
; i
++) {
741 uint16 mid
= aiocb_list
[i
]->aio_sigevent
.sigev_value
.sival_int
;
743 aio_ex
= find_aio_ex(mid
);
746 DEBUG(0, ("wait_for_aio_completion: mid %u "
747 "doesn't match an aio record\n",
748 (unsigned int)mid
));
752 if (!handle_aio_completed(aio_ex
, &err
)) {
755 delete_aio_ex(aio_ex
);
758 SAFE_FREE(aiocb_list
);
759 seconds_left
= SMB_TIME_FOR_AIO_COMPLETE_WAIT
760 - (time(NULL
) - start_time
);
763 /* We timed out - we don't know why. Return ret if already an error,
765 DEBUG(10,("wait_for_aio_completion: aio_suspend timed out waiting "
767 aio_completion_count
));
772 /****************************************************************************
773 Cancel any outstanding aio requests. The client doesn't care about the reply.
774 *****************************************************************************/
776 void cancel_aio_by_fsp(files_struct
*fsp
)
778 struct aio_extra
*aio_ex
;
780 for( aio_ex
= aio_list_head
; aio_ex
; aio_ex
= aio_ex
->next
) {
781 if (aio_ex
->fsp
== fsp
) {
782 /* Don't delete the aio_extra record as we may have
783 completed and don't yet know it. Just do the
784 aio_cancel call and return. */
785 SMB_VFS_AIO_CANCEL(fsp
, &aio_ex
->acb
);
786 aio_ex
->fsp
= NULL
; /* fsp will be closed when we
793 bool aio_finished(void)
798 void initialize_async_io_handler(void)
802 int process_aio_queue(void)
807 bool schedule_aio_read_and_X(connection_struct
*conn
,
808 struct smb_request
*req
,
809 files_struct
*fsp
, SMB_OFF_T startpos
,
815 bool schedule_aio_write_and_X(connection_struct
*conn
,
816 struct smb_request
*req
,
817 files_struct
*fsp
, char *data
,
824 void cancel_aio_by_fsp(files_struct
*fsp
)
828 int wait_for_aio_completion(files_struct
*fsp
)