#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);
{
struct sock *sk = sock->sk;
struct sockaddr_pkt *saddr = (struct sockaddr_pkt *)msg->msg_name;
- struct sk_buff *skb;
+ struct sk_buff *skb = NULL;
struct net_device *dev;
__be16 proto = 0;
int err;
*/
saddr->spkt_device[13] = 0;
- dev = dev_get_by_name(sock_net(sk), saddr->spkt_device);
+retry:
+ rcu_read_lock();
+ dev = dev_get_by_name_rcu(sock_net(sk), saddr->spkt_device);
err = -ENODEV;
if (dev == NULL)
goto out_unlock;
if (len > dev->mtu + dev->hard_header_len)
goto out_unlock;
- err = -ENOBUFS;
- skb = sock_wmalloc(sk, len + LL_RESERVED_SPACE(dev), 0, GFP_KERNEL);
-
- /*
- * If the write buffer is full, then tough. At this level the user
- * gets to deal with the problem - do your own algorithmic backoffs.
- * That's far more flexible.
- */
-
- if (skb == NULL)
- goto out_unlock;
-
- /*
- * Fill it in
- */
-
- /* FIXME: Save some space for broken drivers that write a
- * hard header at transmission time by themselves. PPP is the
- * notable one here. This should really be fixed at the driver level.
- */
- skb_reserve(skb, LL_RESERVED_SPACE(dev));
- skb_reset_network_header(skb);
-
- /* Try to align data part correctly */
- if (dev->header_ops) {
- skb->data -= dev->hard_header_len;
- skb->tail -= dev->hard_header_len;
- if (len < dev->hard_header_len)
- skb_reset_network_header(skb);
+ if (!skb) {
+ size_t reserved = LL_RESERVED_SPACE(dev);
+ unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0;
+
+ rcu_read_unlock();
+ skb = sock_wmalloc(sk, len + reserved, 0, GFP_KERNEL);
+ if (skb == NULL)
+ return -ENOBUFS;
+ /* FIXME: Save some space for broken drivers that write a hard
+ * header at transmission time by themselves. PPP is the notable
+ * one here. This should really be fixed at the driver level.
+ */
+ skb_reserve(skb, reserved);
+ skb_reset_network_header(skb);
+
+ /* Try to align data part correctly */
+ if (hhlen) {
+ skb->data -= hhlen;
+ skb->tail -= hhlen;
+ if (len < hhlen)
+ skb_reset_network_header(skb);
+ }
+ err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+ if (err)
+ goto out_free;
+ goto retry;
}
- /* Returns -EFAULT on error */
- err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+
skb->protocol = proto;
skb->dev = dev;
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
- if (err)
- goto out_free;
-
- /*
- * Now send it
- */
dev_queue_xmit(skb);
- dev_put(dev);
+ rcu_read_unlock();
return len;
+out_unlock:
+ rcu_read_unlock();
out_free:
kfree_skb(skb);
-out_unlock:
- if (dev)
- dev_put(dev);
return err;
}
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++;
+ 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++;
- 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:
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;
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);
}
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();
#endif
-static int packet_net_init(struct net *net)
+static int __net_init packet_net_init(struct net *net)
{
rwlock_init(&net->packet.sklist_lock);
INIT_HLIST_HEAD(&net->packet.sklist);
return 0;
}
-static void packet_net_exit(struct net *net)
+static void __net_exit packet_net_exit(struct net *net)
{
proc_net_remove(net, "packet");
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff