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Add check for AIO support before starting up.

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This commit is contained in:
Nate Lawson 2003-01-13 05:34:42 +00:00
parent ec693c0e79
commit 2d696c643e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=109161
1 changed files with 27 additions and 0 deletions
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27
share/examples/scsi_target/scsi_target.c
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@ -40,6 +40,7 @@
#include <sysexits.h>
#include <unistd.h>
#include <aio.h>
#include <assert.h>
#include <sys/stat.h>
#include <sys/queue.h>
#include <sys/event.h>
@ -205,6 +206,32 @@ main(int argc, char *argv[])
if (volume_size <= 0)
errx(1, "volume must be larger than %d", sector_size);
{
struct aiocb aio, *aiop;
/* Make sure we have working AIO support */
memset(&aio, 0, sizeof(aio));
aio.aio_buf = malloc(sector_size);
if (aio.aio_buf == NULL)
err(1, "malloc");
aio.aio_fildes = file_fd;
aio.aio_offset = 0;
aio.aio_nbytes = sector_size;
signal(SIGSYS, SIG_IGN);
if (aio_read(&aio) != 0) {
printf("You must enable VFS_AIO in your kernel "
"or load the aio(4) module.\n");
err(1, "aio_read");
}
if (aio_waitcomplete(&aiop, NULL) != sector_size)
err(1, "aio_waitcomplete");
assert(aiop == &aio);
signal(SIGSYS, SIG_DFL);
free((void *)aio.aio_buf);
if (debug)
warnx("aio support tested ok");
}
/* Go through all the control devices and find one that isn't busy. */
unit = 0;
do {