#include <linux/file.h>
#include <linux/proc_fs.h>
#include <linux/mutex.h>
+#include <linux/wait.h>
#include <net/sock.h>
#include <net/af_unix.h>
static LIST_HEAD(gc_inflight_list);
static LIST_HEAD(gc_candidates);
static DEFINE_SPINLOCK(unix_gc_lock);
+static DECLARE_WAIT_QUEUE_HEAD(unix_gc_wait);
unsigned int unix_tot_inflight;
* Socket ?
*/
if (S_ISSOCK(inode->i_mode)) {
- struct socket * sock = SOCKET_I(inode);
- struct sock * s = sock->sk;
+ struct socket *sock = SOCKET_I(inode);
+ struct sock *s = sock->sk;
/*
* PF_UNIX ?
void unix_inflight(struct file *fp)
{
struct sock *s = unix_get_socket(fp);
- if(s) {
+ if (s) {
struct unix_sock *u = unix_sk(s);
spin_lock(&unix_gc_lock);
if (atomic_long_inc_return(&u->inflight) == 1) {
void unix_notinflight(struct file *fp)
{
struct sock *s = unix_get_socket(fp);
- if(s) {
+ if (s) {
struct unix_sock *u = unix_sk(s);
spin_lock(&unix_gc_lock);
BUG_ON(list_empty(&u->link));
static inline struct sk_buff *sock_queue_head(struct sock *sk)
{
- return (struct sk_buff *) &sk->sk_receive_queue;
+ return (struct sk_buff *)&sk->sk_receive_queue;
}
#define receive_queue_for_each_skb(sk, next, skb) \
list_move_tail(&u->link, &gc_candidates);
}
-/* The external entry point: unix_gc() */
+static bool gc_in_progress = false;
-void unix_gc(void)
+void wait_for_unix_gc(void)
{
- static bool gc_in_progress = false;
+ wait_event(unix_gc_wait, gc_in_progress == false);
+}
+/* The external entry point: unix_gc() */
+void unix_gc(void)
+{
struct unix_sock *u;
struct unix_sock *next;
struct sk_buff_head hitlist;
*/
skb_queue_head_init(&hitlist);
list_for_each_entry(u, &gc_candidates, link)
- scan_children(&u->sk, inc_inflight, &hitlist);
+ scan_children(&u->sk, inc_inflight, &hitlist);
spin_unlock(&unix_gc_lock);
/* All candidates should have been detached by now. */
BUG_ON(!list_empty(&gc_candidates));
gc_in_progress = false;
+ wake_up(&unix_gc_wait);
out:
spin_unlock(&unix_gc_lock);