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 2 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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /* The signal we'll use to signify aio done. */
28 #define RT_SIGNAL_AIO (SIGRTMIN+3)
31 /****************************************************************************
32 The buffer we keep around whilst an aio request is in process.
33 *****************************************************************************/
36 struct aio_extra
*next
, *prev
;
45 static struct aio_extra
*aio_list_head
;
47 /****************************************************************************
48 Create the extended aio struct we must keep around for the lifetime
50 *****************************************************************************/
52 static struct aio_extra
*create_aio_ex_read(files_struct
*fsp
, size_t buflen
,
55 struct aio_extra
*aio_ex
= SMB_MALLOC_P(struct aio_extra
);
61 /* The output buffer stored in the aio_ex is the start of
62 the smb return buffer. The buffer used in the acb
63 is the start of the reply data portion of that buffer. */
64 aio_ex
->outbuf
= SMB_MALLOC_ARRAY(char, buflen
);
65 if (!aio_ex
->outbuf
) {
69 DLIST_ADD(aio_list_head
, aio_ex
);
71 aio_ex
->read_req
= True
;
76 /****************************************************************************
77 Create the extended aio struct we must keep around for the lifetime
78 of the aio_write call.
79 *****************************************************************************/
81 static struct aio_extra
*create_aio_ex_write(files_struct
*fsp
,
86 struct aio_extra
*aio_ex
= SMB_MALLOC_P(struct aio_extra
);
93 /* We need space for an output reply of outbuflen bytes. */
94 aio_ex
->outbuf
= SMB_MALLOC_ARRAY(char, outbuflen
);
95 if (!aio_ex
->outbuf
) {
100 if (!(aio_ex
->inbuf
= SMB_MALLOC_ARRAY(char, inbuflen
))) {
101 SAFE_FREE(aio_ex
->outbuf
);
106 DLIST_ADD(aio_list_head
, aio_ex
);
108 aio_ex
->read_req
= False
;
113 /****************************************************************************
114 Delete the extended aio struct.
115 *****************************************************************************/
117 static void delete_aio_ex(struct aio_extra
*aio_ex
)
119 DLIST_REMOVE(aio_list_head
, aio_ex
);
120 SAFE_FREE(aio_ex
->inbuf
);
121 SAFE_FREE(aio_ex
->outbuf
);
125 /****************************************************************************
126 Given the aiocb struct find the extended aio struct containing it.
127 *****************************************************************************/
129 static struct aio_extra
*find_aio_ex(uint16 mid
)
133 for( p
= aio_list_head
; p
; p
= p
->next
) {
141 /****************************************************************************
142 We can have these many aio buffers in flight.
143 *****************************************************************************/
145 #define AIO_PENDING_SIZE 10
146 static sig_atomic_t signals_received
;
147 static int outstanding_aio_calls
;
148 static uint16 aio_pending_array
[AIO_PENDING_SIZE
];
150 /****************************************************************************
151 Signal handler when an aio request completes.
152 *****************************************************************************/
154 static void signal_handler(int sig
, siginfo_t
*info
, void *unused
)
156 if (signals_received
< AIO_PENDING_SIZE
) {
157 aio_pending_array
[signals_received
] = info
->si_value
.sival_int
;
159 } /* Else signal is lost. */
160 sys_select_signal(RT_SIGNAL_AIO
);
163 /****************************************************************************
164 Is there a signal waiting ?
165 *****************************************************************************/
167 BOOL
aio_finished(void)
169 return (signals_received
!= 0);
172 /****************************************************************************
173 Initialize the signal handler for aio read/write.
174 *****************************************************************************/
176 void initialize_async_io_handler(void)
178 struct sigaction act
;
181 act
.sa_sigaction
= signal_handler
;
182 act
.sa_flags
= SA_SIGINFO
;
183 sigemptyset( &act
.sa_mask
);
184 if (sigaction(RT_SIGNAL_AIO
, &act
, NULL
) != 0) {
185 DEBUG(0,("Failed to setup RT_SIGNAL_AIO handler\n"));
188 /* the signal can start off blocked due to a bug in bash */
189 BlockSignals(False
, RT_SIGNAL_AIO
);
192 /****************************************************************************
193 Set up an aio request from a SMBreadX call.
194 *****************************************************************************/
196 BOOL
schedule_aio_read_and_X(connection_struct
*conn
,
197 char *inbuf
, char *outbuf
,
198 int length
, int len_outbuf
,
199 files_struct
*fsp
, SMB_OFF_T startpos
,
202 struct aio_extra
*aio_ex
;
205 size_t min_aio_read_size
= lp_aio_read_size(SNUM(conn
));
207 if (!min_aio_read_size
|| (smb_maxcnt
< min_aio_read_size
)) {
208 /* Too small a read for aio request. */
209 DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
210 "for minimum aio_read of %u\n",
211 (unsigned int)smb_maxcnt
,
212 (unsigned int)min_aio_read_size
));
216 /* Only do this on non-chained and non-chaining reads not using the
218 if (chain_size
!=0 || (CVAL(inbuf
,smb_vwv0
) != 0xFF)
219 || (lp_write_cache_size(SNUM(conn
)) != 0) ) {
223 if (outstanding_aio_calls
>= AIO_PENDING_SIZE
) {
224 DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
225 "activities outstanding.\n",
226 outstanding_aio_calls
));
230 /* The following is safe from integer wrap as we've already
231 checked smb_maxcnt is 128k or less. */
232 bufsize
= PTR_DIFF(smb_buf(outbuf
),outbuf
) + smb_maxcnt
;
234 if ((aio_ex
= create_aio_ex_read(fsp
, bufsize
,
235 SVAL(inbuf
,smb_mid
))) == NULL
) {
236 DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
240 /* Copy the SMB header already setup in outbuf. */
241 memcpy(aio_ex
->outbuf
, outbuf
, smb_buf(outbuf
) - outbuf
);
242 SCVAL(aio_ex
->outbuf
,smb_vwv0
,0xFF); /* Never a chained reply. */
246 /* Now set up the aio record for the read call. */
248 a
->aio_fildes
= fsp
->fh
->fd
;
249 a
->aio_buf
= smb_buf(aio_ex
->outbuf
);
250 a
->aio_nbytes
= smb_maxcnt
;
251 a
->aio_offset
= startpos
;
252 a
->aio_sigevent
.sigev_notify
= SIGEV_SIGNAL
;
253 a
->aio_sigevent
.sigev_signo
= RT_SIGNAL_AIO
;
254 a
->aio_sigevent
.sigev_value
.sival_int
= aio_ex
->mid
;
256 if (SMB_VFS_AIO_READ(fsp
,a
) == -1) {
257 DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
258 "Error %s\n", strerror(errno
) ));
259 delete_aio_ex(aio_ex
);
263 DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
264 "offset %.0f, len = %u (mid = %u)\n",
265 fsp
->fsp_name
, (double)startpos
, (unsigned int)smb_maxcnt
,
266 (unsigned int)aio_ex
->mid
));
268 srv_defer_sign_response(aio_ex
->mid
);
269 outstanding_aio_calls
++;
273 /****************************************************************************
274 Set up an aio request from a SMBwriteX call.
275 *****************************************************************************/
277 BOOL
schedule_aio_write_and_X(connection_struct
*conn
,
278 char *inbuf
, char *outbuf
,
279 int length
, int len_outbuf
,
280 files_struct
*fsp
, char *data
,
284 struct aio_extra
*aio_ex
;
286 size_t inbufsize
, outbufsize
;
287 BOOL write_through
= BITSETW(inbuf
+smb_vwv7
,0);
288 size_t min_aio_write_size
= lp_aio_write_size(SNUM(conn
));
290 if (!min_aio_write_size
|| (numtowrite
< min_aio_write_size
)) {
291 /* Too small a write for aio request. */
292 DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
293 "small for minimum aio_write of %u\n",
294 (unsigned int)numtowrite
,
295 (unsigned int)min_aio_write_size
));
299 /* Only do this on non-chained and non-chaining reads not using the
301 if (chain_size
!=0 || (CVAL(inbuf
,smb_vwv0
) != 0xFF)
302 || (lp_write_cache_size(SNUM(conn
)) != 0) ) {
306 if (outstanding_aio_calls
>= AIO_PENDING_SIZE
) {
307 DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
308 "activities outstanding.\n",
309 outstanding_aio_calls
));
310 DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
311 "aio_write for file %s, offset %.0f, len = %u "
313 fsp
->fsp_name
, (double)startpos
,
314 (unsigned int)numtowrite
,
315 (unsigned int)SVAL(inbuf
,smb_mid
) ));
319 inbufsize
= smb_len(inbuf
) + 4;
320 outbufsize
= smb_len(outbuf
) + 4;
321 if (!(aio_ex
= create_aio_ex_write(fsp
, inbufsize
, outbufsize
,
322 SVAL(inbuf
,smb_mid
)))) {
323 DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
327 /* Copy the SMB header already setup in outbuf. */
328 memcpy(aio_ex
->inbuf
, inbuf
, inbufsize
);
330 /* Copy the SMB header already setup in outbuf. */
331 memcpy(aio_ex
->outbuf
, outbuf
, outbufsize
);
332 SCVAL(aio_ex
->outbuf
,smb_vwv0
,0xFF); /* Never a chained reply. */
336 /* Now set up the aio record for the write call. */
338 a
->aio_fildes
= fsp
->fh
->fd
;
339 a
->aio_buf
= aio_ex
->inbuf
+ (PTR_DIFF(data
, inbuf
));
340 a
->aio_nbytes
= numtowrite
;
341 a
->aio_offset
= startpos
;
342 a
->aio_sigevent
.sigev_notify
= SIGEV_SIGNAL
;
343 a
->aio_sigevent
.sigev_signo
= RT_SIGNAL_AIO
;
344 a
->aio_sigevent
.sigev_value
.sival_int
= aio_ex
->mid
;
346 if (SMB_VFS_AIO_WRITE(fsp
,a
) == -1) {
347 DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
348 "Error %s\n", strerror(errno
) ));
349 delete_aio_ex(aio_ex
);
353 if (!write_through
&& !lp_syncalways(SNUM(fsp
->conn
))
354 && fsp
->aio_write_behind
) {
355 /* Lie to the client and immediately claim we finished the
357 SSVAL(aio_ex
->outbuf
,smb_vwv2
,numtowrite
);
358 SSVAL(aio_ex
->outbuf
,smb_vwv4
,(numtowrite
>>16)&1);
359 show_msg(aio_ex
->outbuf
);
360 if (!send_smb(smbd_server_fd(),aio_ex
->outbuf
)) {
361 exit_server_cleanly("handle_aio_write: send_smb "
364 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
365 "behind for file %s\n", fsp
->fsp_name
));
367 srv_defer_sign_response(aio_ex
->mid
);
369 outstanding_aio_calls
++;
371 DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write for file "
372 "%s, offset %.0f, len = %u (mid = %u) "
373 "outstanding_aio_calls = %d\n",
374 fsp
->fsp_name
, (double)startpos
, (unsigned int)numtowrite
,
375 (unsigned int)aio_ex
->mid
, outstanding_aio_calls
));
381 /****************************************************************************
382 Complete the read and return the data or error back to the client.
383 Returns errno or zero if all ok.
384 *****************************************************************************/
386 static int handle_aio_read_complete(struct aio_extra
*aio_ex
)
390 char *outbuf
= aio_ex
->outbuf
;
391 char *data
= smb_buf(outbuf
);
392 ssize_t nread
= SMB_VFS_AIO_RETURN(aio_ex
->fsp
,&aio_ex
->acb
);
395 /* We're relying here on the fact that if the fd is
396 closed then the aio will complete and aio_return
397 will return an error. Hopefully this is
400 /* If errno is ECANCELED then don't return anything to the
402 if (errno
== ECANCELED
) {
403 srv_cancel_sign_response(aio_ex
->mid
);
407 DEBUG( 3,( "handle_aio_read_complete: file %s nread == -1. "
409 aio_ex
->fsp
->fsp_name
, strerror(errno
) ));
411 outsize
= (UNIXERROR(ERRDOS
,ERRnoaccess
));
414 outsize
= set_message(outbuf
,12,nread
,False
);
415 SSVAL(outbuf
,smb_vwv2
,0xFFFF); /* Remaining - must be * -1. */
416 SSVAL(outbuf
,smb_vwv5
,nread
);
417 SSVAL(outbuf
,smb_vwv6
,smb_offset(data
,outbuf
));
418 SSVAL(outbuf
,smb_vwv7
,((nread
>> 16) & 1));
419 SSVAL(smb_buf(outbuf
),-2,nread
);
421 DEBUG( 3, ( "handle_aio_read_complete file %s max=%d "
423 aio_ex
->fsp
->fsp_name
,
424 aio_ex
->acb
.aio_nbytes
, (int)nread
) );
427 smb_setlen(outbuf
,outsize
- 4);
429 if (!send_smb(smbd_server_fd(),outbuf
)) {
430 exit_server_cleanly("handle_aio_read_complete: send_smb "
434 DEBUG(10,("handle_aio_read_complete: scheduled aio_read completed "
435 "for file %s, offset %.0f, len = %u\n",
436 aio_ex
->fsp
->fsp_name
, (double)aio_ex
->acb
.aio_offset
,
437 (unsigned int)nread
));
442 /****************************************************************************
443 Complete the write and return the data or error back to the client.
444 Returns errno or zero if all ok.
445 *****************************************************************************/
447 static int handle_aio_write_complete(struct aio_extra
*aio_ex
)
450 files_struct
*fsp
= aio_ex
->fsp
;
451 char *outbuf
= aio_ex
->outbuf
;
452 ssize_t numtowrite
= aio_ex
->acb
.aio_nbytes
;
453 ssize_t nwritten
= SMB_VFS_AIO_RETURN(fsp
,&aio_ex
->acb
);
455 if (fsp
->aio_write_behind
) {
456 if (nwritten
!= numtowrite
) {
457 if (nwritten
== -1) {
458 DEBUG(5,("handle_aio_write_complete: "
459 "aio_write_behind failed ! File %s "
460 "is corrupt ! Error %s\n",
461 fsp
->fsp_name
, strerror(errno
) ));
464 DEBUG(0,("handle_aio_write_complete: "
465 "aio_write_behind failed ! File %s "
466 "is corrupt ! Wanted %u bytes but "
467 "only wrote %d\n", fsp
->fsp_name
,
468 (unsigned int)numtowrite
,
473 DEBUG(10,("handle_aio_write_complete: "
474 "aio_write_behind completed for file %s\n",
480 /* We don't need outsize or set_message here as we've already set the
481 fixed size length when we set up the aio call. */
484 DEBUG( 3,( "handle_aio_write: file %s wanted %u bytes. "
485 "nwritten == %d. Error = %s\n",
486 fsp
->fsp_name
, (unsigned int)numtowrite
,
487 (int)nwritten
, strerror(errno
) ));
489 /* If errno is ECANCELED then don't return anything to the
491 if (errno
== ECANCELED
) {
492 srv_cancel_sign_response(aio_ex
->mid
);
496 UNIXERROR(ERRHRD
,ERRdiskfull
);
499 BOOL write_through
= BITSETW(aio_ex
->inbuf
+smb_vwv7
,0);
502 SSVAL(outbuf
,smb_vwv2
,nwritten
);
503 SSVAL(outbuf
,smb_vwv4
,(nwritten
>>16)&1);
504 if (nwritten
< (ssize_t
)numtowrite
) {
505 SCVAL(outbuf
,smb_rcls
,ERRHRD
);
506 SSVAL(outbuf
,smb_err
,ERRdiskfull
);
509 DEBUG(3,("handle_aio_write: fnum=%d num=%d wrote=%d\n",
510 fsp
->fnum
, (int)numtowrite
, (int)nwritten
));
511 status
= sync_file(fsp
->conn
,fsp
, write_through
);
512 if (!NT_STATUS_IS_OK(status
)) {
513 UNIXERROR(ERRHRD
,ERRdiskfull
);
515 DEBUG(5,("handle_aio_write: sync_file for %s returned %s\n",
516 fsp
->fsp_name
, nt_errstr(status
) ));
521 if (!send_smb(smbd_server_fd(),outbuf
)) {
522 exit_server_cleanly("handle_aio_write: send_smb failed.");
525 DEBUG(10,("handle_aio_write_complete: scheduled aio_write completed "
526 "for file %s, offset %.0f, requested %u, written = %u\n",
527 fsp
->fsp_name
, (double)aio_ex
->acb
.aio_offset
,
528 (unsigned int)numtowrite
, (unsigned int)nwritten
));
533 /****************************************************************************
534 Handle any aio completion. Returns True if finished (and sets *perr if err
535 was non-zero), False if not.
536 *****************************************************************************/
538 static BOOL
handle_aio_completed(struct aio_extra
*aio_ex
, int *perr
)
542 /* Ensure the operation has really completed. */
543 if (SMB_VFS_AIO_ERROR(aio_ex
->fsp
, &aio_ex
->acb
) == EINPROGRESS
) {
544 DEBUG(10,( "handle_aio_completed: operation mid %u still in "
545 "process for file %s\n",
546 aio_ex
->mid
, aio_ex
->fsp
->fsp_name
));
550 if (aio_ex
->read_req
) {
551 err
= handle_aio_read_complete(aio_ex
);
553 err
= handle_aio_write_complete(aio_ex
);
557 *perr
= err
; /* Only save non-zero errors. */
563 /****************************************************************************
564 Handle any aio completion inline.
565 Returns non-zero errno if fail or zero if all ok.
566 *****************************************************************************/
568 int process_aio_queue(void)
573 BlockSignals(True
, RT_SIGNAL_AIO
);
575 DEBUG(10,("process_aio_queue: signals_received = %d\n",
576 (int)signals_received
));
577 DEBUG(10,("process_aio_queue: outstanding_aio_calls = %d\n",
578 outstanding_aio_calls
));
580 if (!signals_received
) {
581 BlockSignals(False
, RT_SIGNAL_AIO
);
585 /* Drain all the complete aio_reads. */
586 for (i
= 0; i
< signals_received
; i
++) {
587 uint16 mid
= aio_pending_array
[i
];
588 files_struct
*fsp
= NULL
;
589 struct aio_extra
*aio_ex
= find_aio_ex(mid
);
592 DEBUG(3,("process_aio_queue: Can't find record to "
593 "match mid %u.\n", (unsigned int)mid
));
594 srv_cancel_sign_response(mid
);
600 /* file was closed whilst I/O was outstanding. Just
602 DEBUG( 3,( "process_aio_queue: file closed whilst "
603 "aio outstanding.\n"));
604 srv_cancel_sign_response(mid
);
608 if (!handle_aio_completed(aio_ex
, &ret
)) {
612 delete_aio_ex(aio_ex
);
615 outstanding_aio_calls
-= signals_received
;
616 signals_received
= 0;
617 BlockSignals(False
, RT_SIGNAL_AIO
);
621 /****************************************************************************
622 We're doing write behind and the client closed the file. Wait up to 30
623 seconds (my arbitrary choice) for the aio to complete. Return 0 if all writes
624 completed, errno to return if not.
625 *****************************************************************************/
627 #define SMB_TIME_FOR_AIO_COMPLETE_WAIT 29
629 int wait_for_aio_completion(files_struct
*fsp
)
631 struct aio_extra
*aio_ex
;
632 const SMB_STRUCT_AIOCB
**aiocb_list
;
633 int aio_completion_count
= 0;
634 time_t start_time
= time(NULL
);
637 for (seconds_left
= SMB_TIME_FOR_AIO_COMPLETE_WAIT
;
638 seconds_left
>= 0;) {
643 aio_completion_count
= 0;
644 for( aio_ex
= aio_list_head
; aio_ex
; aio_ex
= aio_ex
->next
) {
645 if (aio_ex
->fsp
== fsp
) {
646 aio_completion_count
++;
650 if (!aio_completion_count
) {
654 DEBUG(3,("wait_for_aio_completion: waiting for %d aio events "
655 "to complete.\n", aio_completion_count
));
657 aiocb_list
= SMB_MALLOC_ARRAY(const SMB_STRUCT_AIOCB
*,
658 aio_completion_count
);
663 for( i
= 0, aio_ex
= aio_list_head
;
665 aio_ex
= aio_ex
->next
) {
666 if (aio_ex
->fsp
== fsp
) {
667 aiocb_list
[i
++] = &aio_ex
->acb
;
671 /* Now wait up to seconds_left for completion. */
672 ts
.tv_sec
= seconds_left
;
675 DEBUG(10,("wait_for_aio_completion: %d events, doing a wait "
677 aio_completion_count
, seconds_left
));
679 err
= SMB_VFS_AIO_SUSPEND(fsp
, aiocb_list
,
680 aio_completion_count
, &ts
);
682 DEBUG(10,("wait_for_aio_completion: returned err = %d, "
683 "errno = %s\n", err
, strerror(errno
) ));
685 if (err
== -1 && errno
== EAGAIN
) {
686 DEBUG(0,("wait_for_aio_completion: aio_suspend timed "
687 "out waiting for %d events after a wait of "
688 "%d seconds\n", aio_completion_count
,
691 cancel_aio_by_fsp(fsp
);
692 SAFE_FREE(aiocb_list
);
696 /* One or more events might have completed - process them if
698 for( i
= 0; i
< aio_completion_count
; i
++) {
699 uint16 mid
= aiocb_list
[i
]->aio_sigevent
.sigev_value
.sival_int
;
701 aio_ex
= find_aio_ex(mid
);
704 DEBUG(0, ("wait_for_aio_completion: mid %u "
705 "doesn't match an aio record\n",
706 (unsigned int)mid
));
710 if (!handle_aio_completed(aio_ex
, &err
)) {
713 delete_aio_ex(aio_ex
);
716 SAFE_FREE(aiocb_list
);
717 seconds_left
= SMB_TIME_FOR_AIO_COMPLETE_WAIT
718 - (time(NULL
) - start_time
);
721 /* We timed out - we don't know why. Return ret if already an error,
723 DEBUG(10,("wait_for_aio_completion: aio_suspend timed out waiting "
725 aio_completion_count
));
730 /****************************************************************************
731 Cancel any outstanding aio requests. The client doesn't care about the reply.
732 *****************************************************************************/
734 void cancel_aio_by_fsp(files_struct
*fsp
)
736 struct aio_extra
*aio_ex
;
738 for( aio_ex
= aio_list_head
; aio_ex
; aio_ex
= aio_ex
->next
) {
739 if (aio_ex
->fsp
== fsp
) {
740 /* Don't delete the aio_extra record as we may have
741 completed and don't yet know it. Just do the
742 aio_cancel call and return. */
743 SMB_VFS_AIO_CANCEL(fsp
,fsp
->fh
->fd
, &aio_ex
->acb
);
744 aio_ex
->fsp
= NULL
; /* fsp will be closed when we
751 BOOL
aio_finished(void)
756 void initialize_async_io_handler(void)
760 int process_aio_queue(void)
765 BOOL
schedule_aio_read_and_X(connection_struct
*conn
,
766 char *inbuf
, char *outbuf
,
767 int length
, int len_outbuf
,
768 files_struct
*fsp
, SMB_OFF_T startpos
,
774 BOOL
schedule_aio_write_and_X(connection_struct
*conn
,
775 char *inbuf
, char *outbuf
,
776 int length
, int len_outbuf
,
777 files_struct
*fsp
, char *data
,
784 void cancel_aio_by_fsp(files_struct
*fsp
)
788 BOOL
wait_for_aio_completion(files_struct
*fsp
)