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posix-aio-compat: Honour AsyncContext 

Don't call callbacks that don't belong to the active AsyncContext.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2009-10-22 17:54:40 +02:00 committed by Anthony Liguori
parent 65d6b3d885
commit e5f37649c6
1 changed files with 12 additions and 0 deletions
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12
posix-aio-compat.c
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@ -48,6 +48,8 @@ struct qemu_paiocb {
ssize_t ret;
int active;
struct qemu_paiocb *next;
int async_context_id;
};
typedef struct PosixAioState {
@ -419,6 +421,7 @@ static int posix_aio_process_queue(void *opaque)
struct qemu_paiocb *acb, **pacb;
int ret;
int result = 0;
int async_context_id = get_async_context_id();
for(;;) {
pacb = &s->first_aio;
@ -426,6 +429,13 @@ static int posix_aio_process_queue(void *opaque)
acb = *pacb;
if (!acb)
return result;
/* we're only interested in requests in the right context */
if (acb->async_context_id != async_context_id) {
pacb = &acb->next;
continue;
}
ret = qemu_paio_error(acb);
if (ret == ECANCELED) {
/* remove the request */
@ -558,6 +568,8 @@ BlockDriverAIOCB *paio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
acb->aio_type = type;
acb->aio_fildes = fd;
acb->ev_signo = SIGUSR2;
acb->async_context_id = get_async_context_id();
if (qiov) {
acb->aio_iov = qiov->iov;
acb->aio_niov = qiov->niov;