#include <linux/module.h>
#include <linux/init.h>
#include <linux/mutex.h>
+#include <linux/if_vlan.h>
#ifdef CONFIG_INET
#include <net/inet_common.h>
struct packet_ring_buffer tx_ring;
int copy_thresh;
#endif
- struct packet_type prot_hook;
spinlock_t bind_lock;
struct mutex pg_vec_lock;
unsigned int running:1, /* prot_hook is attached*/
unsigned int tp_reserve;
unsigned int tp_loss:1;
#endif
+ struct packet_type prot_hook ____cacheline_aligned_in_smp;
};
struct packet_skb_cb {
if (skb->pkt_type == PACKET_LOOPBACK)
goto out;
- if (dev_net(dev) != sock_net(sk))
+ if (!net_eq(dev_net(dev), sock_net(sk)))
goto out;
skb = skb_share_check(skb, GFP_ATOMIC);
*/
saddr->spkt_device[13] = 0;
- dev = dev_get_by_name(sock_net(sk), saddr->spkt_device);
+ rcu_read_lock();
+ dev = dev_get_by_name_rcu(sock_net(sk), saddr->spkt_device);
err = -ENODEV;
if (dev == NULL)
goto out_unlock;
*/
dev_queue_xmit(skb);
- dev_put(dev);
+ rcu_read_unlock();
return len;
out_free:
kfree_skb(skb);
out_unlock:
- if (dev)
- dev_put(dev);
+ rcu_read_unlock();
return err;
}
}
/*
- * If we've lost frames since the last time we queued one to the
- * sk_receive_queue, we need to record it here.
- * This must be called under the protection of the socket lock
- * to prevent racing with other softirqs and user space
- */
-static inline void record_packet_gap(struct sk_buff *skb,
- struct packet_sock *po)
-{
- /*
- * We overload the mark field here, since we're about
- * to enqueue to a receive queue and no body else will
- * use this field at this point
- */
- skb->mark = po->stats.tp_gap;
- po->stats.tp_gap = 0;
- return;
-
-}
-
-static inline __u32 check_packet_gap(struct sk_buff *skb)
-{
- return skb->mark;
-}
-
-/*
This function makes lazy skb cloning in hope that most of packets
are discarded by BPF.
sk = pt->af_packet_priv;
po = pkt_sk(sk);
- if (dev_net(dev) != sock_net(sk))
+ if (!net_eq(dev_net(dev), sock_net(sk)))
goto drop;
skb->dev = dev;
spin_lock(&sk->sk_receive_queue.lock);
po->stats.tp_packets++;
- record_packet_gap(skb, po);
+ skb->dropcount = atomic_read(&sk->sk_drops);
__skb_queue_tail(&sk->sk_receive_queue, skb);
spin_unlock(&sk->sk_receive_queue.lock);
sk->sk_data_ready(sk, skb->len);
return 0;
drop_n_acct:
- spin_lock(&sk->sk_receive_queue.lock);
- po->stats.tp_drops++;
- po->stats.tp_gap++;
- spin_unlock(&sk->sk_receive_queue.lock);
+ po->stats.tp_drops = atomic_inc_return(&sk->sk_drops);
drop_n_restore:
if (skb_head != skb->data && skb_shared(skb)) {
sk = pt->af_packet_priv;
po = pkt_sk(sk);
- if (dev_net(dev) != sock_net(sk))
+ if (!net_eq(dev_net(dev), sock_net(sk)))
goto drop;
if (dev->header_ops) {
getnstimeofday(&ts);
h.h2->tp_sec = ts.tv_sec;
h.h2->tp_nsec = ts.tv_nsec;
- h.h2->tp_vlan_tci = skb->vlan_tci;
+ h.h2->tp_vlan_tci = vlan_tx_tag_get(skb);
hdrlen = sizeof(*h.h2);
break;
default:
ring_is_full:
po->stats.tp_drops++;
- po->stats.tp_gap++;
spin_unlock(&sk->sk_receive_queue.lock);
sk->sk_data_ready(sk, 0);
goto out_put;
size_max = po->tx_ring.frame_size
- - sizeof(struct skb_shared_info)
- - po->tp_hdrlen
- - LL_ALLOCATED_SPACE(dev)
- - sizeof(struct sockaddr_ll);
+ - (po->tp_hdrlen - sizeof(struct sockaddr_ll));
if (size_max > dev->mtu + reserve)
size_max = dev->mtu + reserve;
goto out_xmit;
packet_increment_head(&po->tx_ring);
len_sum += tp_len;
- } while (likely((ph != NULL) || ((!(msg->msg_flags & MSG_DONTWAIT))
- && (atomic_read(&po->tx_ring.pending))))
- );
+ } while (likely((ph != NULL) ||
+ ((!(msg->msg_flags & MSG_DONTWAIT)) &&
+ (atomic_read(&po->tx_ring.pending))))
+ );
err = len_sum;
goto out_put;
* Create a packet of type SOCK_PACKET.
*/
-static int packet_create(struct net *net, struct socket *sock, int protocol)
+static int packet_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
{
struct sock *sk;
struct packet_sock *po;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
- __u32 gap;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
if (err)
goto out_free;
- sock_recv_timestamp(msg, sk, skb);
+ sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
- aux.tp_vlan_tci = skb->vlan_tci;
+ aux.tp_vlan_tci = vlan_tx_tag_get(skb);
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
- gap = check_packet_gap(skb);
- if (gap)
- put_cmsg(msg, SOL_PACKET, PACKET_GAPDATA, sizeof(__u32), &gap);
-
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
return -EOPNOTSUPP;
uaddr->sa_family = AF_PACKET;
- dev = dev_get_by_index(sock_net(sk), pkt_sk(sk)->ifindex);
- if (dev) {
+ rcu_read_lock();
+ dev = dev_get_by_index_rcu(sock_net(sk), pkt_sk(sk)->ifindex);
+ if (dev)
strlcpy(uaddr->sa_data, dev->name, 15);
- dev_put(dev);
- } else
+ else
memset(uaddr->sa_data, 0, 14);
+ rcu_read_unlock();
*uaddr_len = sizeof(*uaddr);
return 0;
struct net_device *dev;
struct sock *sk = sock->sk;
struct packet_sock *po = pkt_sk(sk);
- struct sockaddr_ll *sll = (struct sockaddr_ll *)uaddr;
+ DECLARE_SOCKADDR(struct sockaddr_ll *, sll, uaddr);
if (peer)
return -EOPNOTSUPP;
sll->sll_family = AF_PACKET;
sll->sll_ifindex = po->ifindex;
sll->sll_protocol = po->num;
- dev = dev_get_by_index(sock_net(sk), po->ifindex);
+ rcu_read_lock();
+ dev = dev_get_by_index_rcu(sock_net(sk), po->ifindex);
if (dev) {
sll->sll_hatype = dev->type;
sll->sll_halen = dev->addr_len;
memcpy(sll->sll_addr, dev->dev_addr, dev->addr_len);
- dev_put(dev);
} else {
sll->sll_hatype = 0; /* Bad: we have no ARPHRD_UNSPEC */
sll->sll_halen = 0;
}
+ rcu_read_unlock();
*uaddr_len = offsetof(struct sockaddr_ll, sll_addr) + sll->sll_halen;
return 0;
if (--ml->count == 0) {
struct net_device *dev;
*mlp = ml->next;
- dev = dev_get_by_index(sock_net(sk), ml->ifindex);
- if (dev) {
+ dev = __dev_get_by_index(sock_net(sk), ml->ifindex);
+ if (dev)
packet_dev_mc(dev, ml, -1);
- dev_put(dev);
- }
kfree(ml);
}
rtnl_unlock();
struct net_device *dev;
po->mclist = ml->next;
- dev = dev_get_by_index(sock_net(sk), ml->ifindex);
- if (dev != NULL) {
+ dev = __dev_get_by_index(sock_net(sk), ml->ifindex);
+ if (dev != NULL)
packet_dev_mc(dev, ml, -1);
- dev_put(dev);
- }
kfree(ml);
}
rtnl_unlock();
.sendpage = sock_no_sendpage,
};
-static struct net_proto_family packet_family_ops = {
+static const struct net_proto_family packet_family_ops = {
.family = PF_PACKET,
.create = packet_create,
.owner = THIS_MODULE,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff