83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
|
|
* 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;
|
|
}
|