diff options
Diffstat (limited to 'net/netlink/af_netlink.c')
| -rw-r--r-- | net/netlink/af_netlink.c | 41 |
1 files changed, 17 insertions, 24 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index bca50b95c182..fdf51353cf78 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -131,7 +131,7 @@ int netlink_add_tap(struct netlink_tap *nt) } EXPORT_SYMBOL_GPL(netlink_add_tap); -int __netlink_remove_tap(struct netlink_tap *nt) +static int __netlink_remove_tap(struct netlink_tap *nt) { bool found = false; struct netlink_tap *tmp; @@ -155,7 +155,6 @@ out: return found ? 0 : -ENODEV; } -EXPORT_SYMBOL_GPL(__netlink_remove_tap); int netlink_remove_tap(struct netlink_tap *nt) { @@ -204,6 +203,8 @@ static int __netlink_deliver_tap_skb(struct sk_buff *skb, if (nskb) { nskb->dev = dev; nskb->protocol = htons((u16) sk->sk_protocol); + nskb->pkt_type = netlink_is_kernel(sk) ? + PACKET_KERNEL : PACKET_USER; ret = dev_queue_xmit(nskb); if (unlikely(ret > 0)) @@ -239,6 +240,13 @@ static void netlink_deliver_tap(struct sk_buff *skb) rcu_read_unlock(); } +static void netlink_deliver_tap_kernel(struct sock *dst, struct sock *src, + struct sk_buff *skb) +{ + if (!(netlink_is_kernel(dst) && netlink_is_kernel(src))) + netlink_deliver_tap(skb); +} + static void netlink_overrun(struct sock *sk) { struct netlink_sock *nlk = nlk_sk(sk); @@ -1697,14 +1705,10 @@ static int netlink_unicast_kernel(struct sock *sk, struct sk_buff *skb, ret = -ECONNREFUSED; if (nlk->netlink_rcv != NULL) { - /* We could do a netlink_deliver_tap(skb) here as well - * but since this is intended for the kernel only, we - * should rather let it stay under the hood. - */ - ret = skb->len; netlink_skb_set_owner_r(skb, sk); NETLINK_CB(skb).sk = ssk; + netlink_deliver_tap_kernel(sk, ssk, skb); nlk->netlink_rcv(skb); consume_skb(skb); } else { @@ -1769,6 +1773,9 @@ struct sk_buff *netlink_alloc_skb(struct sock *ssk, unsigned int size, if (ring->pg_vec == NULL) goto out_put; + if (ring->frame_size - NL_MMAP_HDRLEN < size) + goto out_put; + skb = alloc_skb_head(gfp_mask); if (skb == NULL) goto err1; @@ -1778,6 +1785,7 @@ struct sk_buff *netlink_alloc_skb(struct sock *ssk, unsigned int size, if (ring->pg_vec == NULL) goto out_free; + /* check again under lock */ maxlen = ring->frame_size - NL_MMAP_HDRLEN; if (maxlen < size) goto out_free; @@ -2214,7 +2222,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock, struct sock_iocb *siocb = kiocb_to_siocb(kiocb); struct sock *sk = sock->sk; struct netlink_sock *nlk = nlk_sk(sk); - struct sockaddr_nl *addr = msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_nl *, addr, msg->msg_name); u32 dst_portid; u32 dst_group; struct sk_buff *skb; @@ -2345,7 +2353,7 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock, err = skb_copy_datagram_iovec(data_skb, 0, msg->msg_iov, copied); if (msg->msg_name) { - struct sockaddr_nl *addr = (struct sockaddr_nl *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_nl *, addr, msg->msg_name); addr->nl_family = AF_NETLINK; addr->nl_pad = 0; addr->nl_pid = NETLINK_CB(skb).portid; @@ -2535,21 +2543,6 @@ void __netlink_clear_multicast_users(struct sock *ksk, unsigned int group) netlink_update_socket_mc(nlk_sk(sk), group, 0); } -/** - * netlink_clear_multicast_users - kick off multicast listeners - * - * This function removes all listeners from the given group. - * @ksk: The kernel netlink socket, as returned by - * netlink_kernel_create(). - * @group: The multicast group to clear. - */ -void netlink_clear_multicast_users(struct sock *ksk, unsigned int group) -{ - netlink_table_grab(); - __netlink_clear_multicast_users(ksk, group); - netlink_table_ungrab(); -} - struct nlmsghdr * __nlmsg_put(struct sk_buff *skb, u32 portid, u32 seq, int type, int len, int flags) { |