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/*
* Virtio 9p backend
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
* Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "fsdev/qemu-fsdev.h"
#include "qemu/thread.h"
#include "qemu/event_notifier.h"
#include "qemu/coroutine.h"
#include "virtio-9p-coth.h"
/* v9fs glib thread pool */
static V9fsThPool v9fs_pool;
void co_run_in_worker_bh(void *opaque)
{
Coroutine *co = opaque;
g_thread_pool_push(v9fs_pool.pool, co, NULL);
}
static void v9fs_qemu_process_req_done(EventNotifier *e)
{
Coroutine *co;
event_notifier_test_and_clear(e);
while ((co = g_async_queue_try_pop(v9fs_pool.completed)) != NULL) {
qemu_coroutine_enter(co, NULL);
}
}
static void v9fs_thread_routine(gpointer data, gpointer user_data)
{
Coroutine *co = data;
qemu_coroutine_enter(co, NULL);
g_async_queue_push(v9fs_pool.completed, co);
event_notifier_set(&v9fs_pool.e);
}
int v9fs_init_worker_threads(void)
{
int ret = 0;
V9fsThPool *p = &v9fs_pool;
sigset_t set, oldset;
sigfillset(&set);
/* Leave signal handling to the iothread. */
pthread_sigmask(SIG_SETMASK, &set, &oldset);
p->pool = g_thread_pool_new(v9fs_thread_routine, p, -1, FALSE, NULL);
if (!p->pool) {
ret = -1;
goto err_out;
}
p->completed = g_async_queue_new();
if (!p->completed) {
/*
* We are going to terminate.
* So don't worry about cleanup
*/
ret = -1;
goto err_out;
}
event_notifier_init(&p->e, 0);
event_notifier_set_handler(&p->e, v9fs_qemu_process_req_done);
err_out:
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
return ret;
}
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