X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fnet%2Fpppol2tp.c;h=244d7830c92aac88486981f7ec52b3d3b141631f;hb=7a34912d90c17a90d9fad12c4c51833b4e70707b;hp=e0b072d9fdb7caf571e6594af1f732068cba5dab;hpb=c58310bf4933986513020fa90b4190c7492995ae;p=linux-2.6 diff --git a/drivers/net/pppol2tp.c b/drivers/net/pppol2tp.c index e0b072d9fd..244d7830c9 100644 --- a/drivers/net/pppol2tp.c +++ b/drivers/net/pppol2tp.c @@ -302,14 +302,14 @@ pppol2tp_session_find(struct pppol2tp_tunnel *tunnel, u16 session_id) struct pppol2tp_session *session; struct hlist_node *walk; - read_lock(&tunnel->hlist_lock); + read_lock_bh(&tunnel->hlist_lock); hlist_for_each_entry(session, walk, session_list, hlist) { if (session->tunnel_addr.s_session == session_id) { - read_unlock(&tunnel->hlist_lock); + read_unlock_bh(&tunnel->hlist_lock); return session; } } - read_unlock(&tunnel->hlist_lock); + read_unlock_bh(&tunnel->hlist_lock); return NULL; } @@ -320,14 +320,14 @@ static struct pppol2tp_tunnel *pppol2tp_tunnel_find(u16 tunnel_id) { struct pppol2tp_tunnel *tunnel = NULL; - read_lock(&pppol2tp_tunnel_list_lock); + read_lock_bh(&pppol2tp_tunnel_list_lock); list_for_each_entry(tunnel, &pppol2tp_tunnel_list, list) { if (tunnel->stats.tunnel_id == tunnel_id) { - read_unlock(&pppol2tp_tunnel_list_lock); + read_unlock_bh(&pppol2tp_tunnel_list_lock); return tunnel; } } - read_unlock(&pppol2tp_tunnel_list_lock); + read_unlock_bh(&pppol2tp_tunnel_list_lock); return NULL; } @@ -342,10 +342,11 @@ static struct pppol2tp_tunnel *pppol2tp_tunnel_find(u16 tunnel_id) static void pppol2tp_recv_queue_skb(struct pppol2tp_session *session, struct sk_buff *skb) { struct sk_buff *skbp; + struct sk_buff *tmp; u16 ns = PPPOL2TP_SKB_CB(skb)->ns; - spin_lock(&session->reorder_q.lock); - skb_queue_walk(&session->reorder_q, skbp) { + spin_lock_bh(&session->reorder_q.lock); + skb_queue_walk_safe(&session->reorder_q, skbp, tmp) { if (PPPOL2TP_SKB_CB(skbp)->ns > ns) { __skb_insert(skb, skbp->prev, skbp, &session->reorder_q); PRINTK(session->debug, PPPOL2TP_MSG_SEQ, KERN_DEBUG, @@ -360,7 +361,7 @@ static void pppol2tp_recv_queue_skb(struct pppol2tp_session *session, struct sk_ __skb_queue_tail(&session->reorder_q, skb); out: - spin_unlock(&session->reorder_q.lock); + spin_unlock_bh(&session->reorder_q.lock); } /* Dequeue a single skb. @@ -371,10 +372,9 @@ static void pppol2tp_recv_dequeue_skb(struct pppol2tp_session *session, struct s int length = PPPOL2TP_SKB_CB(skb)->length; struct sock *session_sock = NULL; - /* We're about to requeue the skb, so unlink it and return resources + /* We're about to requeue the skb, so return resources * to its current owner (a socket receive buffer). */ - skb_unlink(skb, &session->reorder_q); skb_orphan(skb); tunnel->stats.rx_packets++; @@ -442,7 +442,7 @@ static void pppol2tp_recv_dequeue(struct pppol2tp_session *session) * expect to send up next, dequeue it and any other * in-sequence packets behind it. */ - spin_lock(&session->reorder_q.lock); + spin_lock_bh(&session->reorder_q.lock); skb_queue_walk_safe(&session->reorder_q, skb, tmp) { if (time_after(jiffies, PPPOL2TP_SKB_CB(skb)->expires)) { session->stats.rx_seq_discards++; @@ -455,6 +455,7 @@ static void pppol2tp_recv_dequeue(struct pppol2tp_session *session) skb_queue_len(&session->reorder_q)); __skb_unlink(skb, &session->reorder_q); kfree_skb(skb); + sock_put(session->sock); continue; } @@ -469,13 +470,18 @@ static void pppol2tp_recv_dequeue(struct pppol2tp_session *session) goto out; } } - spin_unlock(&session->reorder_q.lock); + __skb_unlink(skb, &session->reorder_q); + + /* Process the skb. We release the queue lock while we + * do so to let other contexts process the queue. + */ + spin_unlock_bh(&session->reorder_q.lock); pppol2tp_recv_dequeue_skb(session, skb); - spin_lock(&session->reorder_q.lock); + spin_lock_bh(&session->reorder_q.lock); } out: - spin_unlock(&session->reorder_q.lock); + spin_unlock_bh(&session->reorder_q.lock); } /* Internal receive frame. Do the real work of receiving an L2TP data frame @@ -1058,7 +1064,7 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb) /* Get routing info from the tunnel socket */ dst_release(skb->dst); - skb->dst = sk_dst_get(sk_tun); + skb->dst = dst_clone(__sk_dst_get(sk_tun)); skb_orphan(skb); skb->sk = sk_tun; @@ -1106,10 +1112,12 @@ static void pppol2tp_tunnel_closeall(struct pppol2tp_tunnel *tunnel) PRINTK(tunnel->debug, PPPOL2TP_MSG_CONTROL, KERN_INFO, "%s: closing all sessions...\n", tunnel->name); - write_lock(&tunnel->hlist_lock); + write_lock_bh(&tunnel->hlist_lock); for (hash = 0; hash < PPPOL2TP_HASH_SIZE; hash++) { again: hlist_for_each_safe(walk, tmp, &tunnel->session_hlist[hash]) { + struct sk_buff *skb; + session = hlist_entry(walk, struct pppol2tp_session, hlist); sk = session->sock; @@ -1126,7 +1134,7 @@ again: * disappear as we're jumping between locks. */ sock_hold(sk); - write_unlock(&tunnel->hlist_lock); + write_unlock_bh(&tunnel->hlist_lock); lock_sock(sk); if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) { @@ -1138,7 +1146,10 @@ again: /* Purge any queued data */ skb_queue_purge(&sk->sk_receive_queue); skb_queue_purge(&sk->sk_write_queue); - skb_queue_purge(&session->reorder_q); + while ((skb = skb_dequeue(&session->reorder_q))) { + kfree_skb(skb); + sock_put(sk); + } release_sock(sk); sock_put(sk); @@ -1148,11 +1159,11 @@ again: * list so we are guaranteed to make forward * progress. */ - write_lock(&tunnel->hlist_lock); + write_lock_bh(&tunnel->hlist_lock); goto again; } } - write_unlock(&tunnel->hlist_lock); + write_unlock_bh(&tunnel->hlist_lock); } /* Really kill the tunnel. @@ -1161,9 +1172,9 @@ again: static void pppol2tp_tunnel_free(struct pppol2tp_tunnel *tunnel) { /* Remove from socket list */ - write_lock(&pppol2tp_tunnel_list_lock); + write_lock_bh(&pppol2tp_tunnel_list_lock); list_del_init(&tunnel->list); - write_unlock(&pppol2tp_tunnel_list_lock); + write_unlock_bh(&pppol2tp_tunnel_list_lock); atomic_dec(&pppol2tp_tunnel_count); kfree(tunnel); @@ -1239,9 +1250,9 @@ static void pppol2tp_session_destruct(struct sock *sk) /* Delete the session socket from the * hash */ - write_lock(&tunnel->hlist_lock); + write_lock_bh(&tunnel->hlist_lock); hlist_del_init(&session->hlist); - write_unlock(&tunnel->hlist_lock); + write_unlock_bh(&tunnel->hlist_lock); atomic_dec(&pppol2tp_session_count); } @@ -1386,9 +1397,9 @@ static struct sock *pppol2tp_prepare_tunnel_socket(int fd, u16 tunnel_id, /* Add tunnel to our list */ INIT_LIST_HEAD(&tunnel->list); - write_lock(&pppol2tp_tunnel_list_lock); + write_lock_bh(&pppol2tp_tunnel_list_lock); list_add(&tunnel->list, &pppol2tp_tunnel_list); - write_unlock(&pppol2tp_tunnel_list_lock); + write_unlock_bh(&pppol2tp_tunnel_list_lock); atomic_inc(&pppol2tp_tunnel_count); /* Bump the reference count. The tunnel context is deleted @@ -1593,11 +1604,11 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr, sk->sk_user_data = session; /* Add session to the tunnel's hash list */ - write_lock(&tunnel->hlist_lock); + write_lock_bh(&tunnel->hlist_lock); hlist_add_head(&session->hlist, pppol2tp_session_id_hash(tunnel, session->tunnel_addr.s_session)); - write_unlock(&tunnel->hlist_lock); + write_unlock_bh(&tunnel->hlist_lock); atomic_inc(&pppol2tp_session_count); @@ -2199,7 +2210,7 @@ static struct pppol2tp_session *next_session(struct pppol2tp_tunnel *tunnel, str int next = 0; int i; - read_lock(&tunnel->hlist_lock); + read_lock_bh(&tunnel->hlist_lock); for (i = 0; i < PPPOL2TP_HASH_SIZE; i++) { hlist_for_each_entry(session, walk, &tunnel->session_hlist[i], hlist) { if (curr == NULL) { @@ -2217,7 +2228,7 @@ static struct pppol2tp_session *next_session(struct pppol2tp_tunnel *tunnel, str } } out: - read_unlock(&tunnel->hlist_lock); + read_unlock_bh(&tunnel->hlist_lock); if (!found) session = NULL; @@ -2228,13 +2239,13 @@ static struct pppol2tp_tunnel *next_tunnel(struct pppol2tp_tunnel *curr) { struct pppol2tp_tunnel *tunnel = NULL; - read_lock(&pppol2tp_tunnel_list_lock); + read_lock_bh(&pppol2tp_tunnel_list_lock); if (list_is_last(&curr->list, &pppol2tp_tunnel_list)) { goto out; } tunnel = list_entry(curr->list.next, struct pppol2tp_tunnel, list); out: - read_unlock(&pppol2tp_tunnel_list_lock); + read_unlock_bh(&pppol2tp_tunnel_list_lock); return tunnel; } @@ -2458,12 +2469,12 @@ static int __init pppol2tp_init(void) goto out_unregister_pppol2tp_proto; #ifdef CONFIG_PROC_FS - pppol2tp_proc = create_proc_entry("pppol2tp", 0, init_net.proc_net); + pppol2tp_proc = proc_net_fops_create(&init_net, "pppol2tp", 0, + &pppol2tp_proc_fops); if (!pppol2tp_proc) { err = -ENOMEM; goto out_unregister_pppox_proto; } - pppol2tp_proc->proc_fops = &pppol2tp_proc_fops; #endif /* CONFIG_PROC_FS */ printk(KERN_INFO "PPPoL2TP kernel driver, %s\n", PPPOL2TP_DRV_VERSION);