on failed aio submission, set aiocb error and return value

it's not clear whether this is required, but it seems arguable that it
should happen. for example aio_suspend is supposed to return
immediately if any of the operations has "completed", which includes
ending with an error status asynchonously and might also be
interpreted to include doing so synchronously.

diff --git a/src/aio/aio.c b/src/aio/aio.c
index dae97cc60c15d9c7fdd4027a44c8aaf0f92bdf2e..6d34fa869340810fc9abddfd5b8412df324aece7 100644 (file)
--- a/src/aio/aio.c
+++ b/src/aio/aio.c
@@ -280,6 +280,8 @@ static int submit(struct aiocb *cb, int op)
 
        if (!q) {
                if (errno != EBADF) errno = EAGAIN;
+               cb->__ret = -1;
+               cb->__err = errno;
                return -1;
        }
        q->ref++;
@@ -303,8 +305,8 @@ static int submit(struct aiocb *cb, int op)
        if (pthread_create(&td, &a, io_thread_func, &args)) {
                pthread_mutex_lock(&q->lock);
                __aio_unref_queue(q);
-               errno = EAGAIN;
-               ret = -1;
+               cb->__err = errno = EAGAIN;
+               cb->__ret = ret = -1;
        }
        pthread_sigmask(SIG_SETMASK, &origmask, 0);