diff options
Diffstat (limited to 'net/packet/af_packet.c')
| -rw-r--r-- | net/packet/af_packet.c | 67 |
1 files changed, 55 insertions, 12 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 94060edbbd70..1d6793dbfbae 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1881,7 +1881,35 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, skb_reserve(skb, hlen); skb_reset_network_header(skb); - data = ph.raw + po->tp_hdrlen - sizeof(struct sockaddr_ll); + if (po->tp_tx_has_off) { + int off_min, off_max, off; + off_min = po->tp_hdrlen - sizeof(struct sockaddr_ll); + off_max = po->tx_ring.frame_size - tp_len; + if (sock->type == SOCK_DGRAM) { + switch (po->tp_version) { + case TPACKET_V2: + off = ph.h2->tp_net; + break; + default: + off = ph.h1->tp_net; + break; + } + } else { + switch (po->tp_version) { + case TPACKET_V2: + off = ph.h2->tp_mac; + break; + default: + off = ph.h1->tp_mac; + break; + } + } + if (unlikely((off < off_min) || (off_max < off))) + return -EINVAL; + data = ph.raw + off; + } else { + data = ph.raw + po->tp_hdrlen - sizeof(struct sockaddr_ll); + } to_write = tp_len; if (sock->type == SOCK_DGRAM) { @@ -1907,7 +1935,6 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, to_write -= dev->hard_header_len; } - err = -EFAULT; offset = offset_in_page(data); len_max = PAGE_SIZE - offset; len = ((to_write > len_max) ? len_max : to_write); @@ -1957,7 +1984,6 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) mutex_lock(&po->pg_vec_lock); - err = -EBUSY; if (saddr == NULL) { dev = po->prot_hook.dev; proto = po->num; @@ -2335,13 +2361,15 @@ static int packet_release(struct socket *sock) packet_flush_mclist(sk); - memset(&req_u, 0, sizeof(req_u)); - - if (po->rx_ring.pg_vec) + if (po->rx_ring.pg_vec) { + memset(&req_u, 0, sizeof(req_u)); packet_set_ring(sk, &req_u, 1, 0); + } - if (po->tx_ring.pg_vec) + if (po->tx_ring.pg_vec) { + memset(&req_u, 0, sizeof(req_u)); packet_set_ring(sk, &req_u, 1, 1); + } fanout_release(sk); @@ -2478,7 +2506,7 @@ static int packet_create(struct net *net, struct socket *sock, int protocol, __be16 proto = (__force __be16)protocol; /* weird, but documented */ int err; - if (!capable(CAP_NET_RAW)) + if (!ns_capable(net->user_ns, CAP_NET_RAW)) return -EPERM; if (sock->type != SOCK_DGRAM && sock->type != SOCK_RAW && sock->type != SOCK_PACKET) @@ -3111,6 +3139,19 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv return fanout_add(sk, val & 0xffff, val >> 16); } + case PACKET_TX_HAS_OFF: + { + unsigned int val; + + if (optlen != sizeof(val)) + return -EINVAL; + if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) + return -EBUSY; + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; + po->tp_tx_has_off = !!val; + return 0; + } default: return -ENOPROTOOPT; } @@ -3202,6 +3243,9 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, ((u32)po->fanout->type << 16)) : 0); break; + case PACKET_TX_HAS_OFF: + val = po->tp_tx_has_off; + break; default: return -ENOPROTOOPT; } @@ -3219,12 +3263,11 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, static int packet_notifier(struct notifier_block *this, unsigned long msg, void *data) { struct sock *sk; - struct hlist_node *node; struct net_device *dev = data; struct net *net = dev_net(dev); rcu_read_lock(); - sk_for_each_rcu(sk, node, &net->packet.sklist) { + sk_for_each_rcu(sk, &net->packet.sklist) { struct packet_sock *po = pkt_sk(sk); switch (msg) { @@ -3784,7 +3827,7 @@ static int __net_init packet_net_init(struct net *net) mutex_init(&net->packet.sklist_lock); INIT_HLIST_HEAD(&net->packet.sklist); - if (!proc_net_fops_create(net, "packet", 0, &packet_seq_fops)) + if (!proc_create("packet", 0, net->proc_net, &packet_seq_fops)) return -ENOMEM; return 0; @@ -3792,7 +3835,7 @@ static int __net_init packet_net_init(struct net *net) static void __net_exit packet_net_exit(struct net *net) { - proc_net_remove(net, "packet"); + remove_proc_entry("packet", net->proc_net); } static struct pernet_operations packet_net_ops = { |