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linux-aio: Handle io_submit() failure gracefully 

It is generally not expected that io_submit() fails other than with
-EAGAIN, but corner cases like SELinux refusing I/O when permissions are
revoked are still possible. In this case, we shouldn't abort, but just
return an I/O error for the request.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1470741619-23231-1-git-send-email-kwolf@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-08-09 13:20:19 +02:00 committed by Stefan Hajnoczi
parent d08306dc42
commit 44713c9e85
1 changed files with 7 additions and 1 deletions
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8
block/linux-aio.c
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@ -221,7 +221,13 @@ static void ioq_submit(LinuxAioState *s)
break;
}
if (ret < 0) {
abort();
/* Fail the first request, retry the rest */
aiocb = QSIMPLEQ_FIRST(&s->io_q.pending);
QSIMPLEQ_REMOVE_HEAD(&s->io_q.pending, next);
s->io_q.in_queue--;
aiocb->ret = ret;
qemu_laio_process_completion(aiocb);
continue;
}
s->io_q.in_flight += ret;