/* 释放一个socket结构，并唤醒socket_wait_free队列 */
static void sock_release(struct socket *sock)
{
int oldstate;
struct inode *inode;
struct socket *peersock, *nextsock;
DPRINTF((net_debug, "NET: sock_release: socket 0x%x, inode 0x%x\n",
sock, SOCK_INODE(sock)));
/* 设置socket的状态为正在关闭连接 */
if ((oldstate = sock->state) != SS_UNCONNECTED)
sock->state = SS_DISCONNECTING;
/* Wake up anyone waiting for connections. */
for (peersock = sock->iconn; peersock; peersock = nextsock) {
nextsock = peersock->next;
sock_release_peer(peersock);
}
/*
* Wake up anyone we're connected to. First, we release the
* protocol, to give it a chance to flush data, etc.
*/
peersock = (oldstate == SS_CONNECTED) ? sock->conn : NULL;
if (sock->ops) sock->ops->release(sock, peersock);
if (peersock) sock_release_peer(peersock);
inode = SOCK_INODE(sock);
sock->state = SS_FREE; /* this really releases us */
wake_up_interruptible(&socket_wait_free);
/* We need to do this. If sock alloc was called we already have an inode. */
iput(inode);
}
static void
sock_release(struct socket *sock)
{
int oldstate;
struct socket *peersock, *nextsock;
PRINTK("sock_release: socket 0x%x, inode 0x%x\n", sock,
SOCK_INODE(sock));
if ((oldstate = sock->state) != SS_UNCONNECTED)
sock->state = SS_DISCONNECTING;
/*
* wake up anyone waiting for connections
*/
for (peersock = sock->iconn; peersock; peersock = nextsock) {
nextsock = peersock->next;
sock_release_peer(peersock);
}
/*
* wake up anyone we're connected to. first, we release the
* protocol, to give it a chance to flush data, etc.
*/
peersock = (oldstate == SS_CONNECTED) ? sock->conn : NULL;
if (sock->ops)
sock->ops->release(sock, peersock);
if (peersock)
sock_release_peer(peersock);
sock->state = SS_FREE; /* this really releases us */
wake_up(&socket_wait_free);
}
