[SK_BUFF]: Convert skb->tail to sk_buff_data_t

[safe/jmp/linux-2.6] / net / packet / af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index bf26990..36388b2 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -114,22 +114,22 @@ On receive:
 -----------
 
 Incoming, dev->hard_header!=NULL
-   mac.raw -> ll header
-   data    -> data
+   mac_header -> ll header
+   data       -> data
 
 Outgoing, dev->hard_header!=NULL
-   mac.raw -> ll header
-   data    -> ll header
+   mac_header -> ll header
+   data       -> ll header
 
 Incoming, dev->hard_header==NULL
-   mac.raw -> UNKNOWN position. It is very likely, that it points to ll header.
-             PPP makes it, that is wrong, because introduce assymetry
-             between rx and tx paths.
-   data    -> data
+   mac_header -> UNKNOWN position. It is very likely, that it points to ll
+                header.  PPP makes it, that is wrong, because introduce
+                 assymetry between rx and tx paths.
+   data       -> data
 
 Outgoing, dev->hard_header==NULL
-   mac.raw -> data. ll header is still not built!
-   data    -> data
+   mac_header -> data. ll header is still not built!
+   data       -> data
 
 Resume
   If dev->hard_header==NULL we are unlikely to restore sensible ll header.
@@ -139,12 +139,12 @@ On transmit:
 ------------
 
 dev->hard_header != NULL
-   mac.raw -> ll header
-   data    -> ll header
+   mac_header -> ll header
+   data       -> ll header
 
 dev->hard_header == NULL (ll header is added by device, we cannot control it)
-   mac.raw -> data
-   data -> data
+   mac_header -> data
+   data       -> data
 
    We should set nh.raw on output to correct posistion,
    packet classifier depends on it.
@@ -227,17 +227,14 @@ struct packet_skb_cb {
 
 #ifdef CONFIG_PACKET_MMAP
 
-static inline char *packet_lookup_frame(struct packet_sock *po, unsigned int position)
+static inline struct tpacket_hdr *packet_lookup_frame(struct packet_sock *po, unsigned int position)
 {
        unsigned int pg_vec_pos, frame_offset;
-       char *frame;
 
        pg_vec_pos = position / po->frames_per_block;
        frame_offset = position % po->frames_per_block;
 
-       frame = po->pg_vec[pg_vec_pos] + (frame_offset * po->frame_size);
-
-       return frame;
+       return (struct tpacket_hdr *)(po->pg_vec[pg_vec_pos] + (frame_offset * po->frame_size));
 }
 #endif
 
@@ -287,7 +284,7 @@ static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev,  struct
         *      Incoming packets have ll header pulled,
         *      push it back.
         *
-        *      For outgoing ones skb->data == skb->mac.raw
+        *      For outgoing ones skb->data == skb_mac_header(skb)
         *      so that this procedure is noop.
         */
 
@@ -306,7 +303,7 @@ static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev,  struct
 
        spkt = &PACKET_SKB_CB(skb)->sa.pkt;
 
-       skb_push(skb, skb->data-skb->mac.raw);
+       skb_push(skb, skb->data - skb_mac_header(skb));
 
        /*
         *      The SOCK_PACKET socket receives _all_ frames.
@@ -404,14 +401,14 @@ static int packet_sendmsg_spkt(struct kiocb *iocb, struct socket *sock,
         * notable one here. This should really be fixed at the driver level.
         */
        skb_reserve(skb, LL_RESERVED_SPACE(dev));
-       skb->nh.raw = skb->data;
+       skb_reset_network_header(skb);
 
        /* Try to align data part correctly */
        if (dev->hard_header) {
                skb->data -= dev->hard_header_len;
                skb->tail -= dev->hard_header_len;
                if (len < dev->hard_header_len)
-                       skb->nh.raw = skb->data;
+                       skb_reset_network_header(skb);
        }
 
        /* Returns -EFAULT on error */
@@ -491,10 +488,10 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
                   never delivered to user.
                 */
                if (sk->sk_type != SOCK_DGRAM)
-                       skb_push(skb, skb->data - skb->mac.raw);
+                       skb_push(skb, skb->data - skb_mac_header(skb));
                else if (skb->pkt_type == PACKET_OUTGOING) {
                        /* Special case: outgoing packets have ll header at head */
-                       skb_pull(skb, skb->nh.raw - skb->data);
+                       skb_pull(skb, skb_network_offset(skb));
                }
        }
 
@@ -585,6 +582,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
        unsigned long status = TP_STATUS_LOSING|TP_STATUS_USER;
        unsigned short macoff, netoff;
        struct sk_buff *copy_skb = NULL;
+       struct timeval tv;
 
        if (skb->pkt_type == PACKET_LOOPBACK)
                goto drop;
@@ -594,10 +592,10 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
 
        if (dev->hard_header) {
                if (sk->sk_type != SOCK_DGRAM)
-                       skb_push(skb, skb->data - skb->mac.raw);
+                       skb_push(skb, skb->data - skb_mac_header(skb));
                else if (skb->pkt_type == PACKET_OUTGOING) {
                        /* Special case: outgoing packets have ll header at head */
-                       skb_pull(skb, skb->nh.raw - skb->data);
+                       skb_pull(skb, skb_network_offset(skb));
                }
        }
 
@@ -615,7 +613,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
        if (sk->sk_type == SOCK_DGRAM) {
                macoff = netoff = TPACKET_ALIGN(TPACKET_HDRLEN) + 16;
        } else {
-               unsigned maclen = skb->nh.raw - skb->data;
+               unsigned maclen = skb_network_offset(skb);
                netoff = TPACKET_ALIGN(TPACKET_HDRLEN + (maclen < 16 ? 16 : maclen));
                macoff = netoff - maclen;
        }
@@ -639,7 +637,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
        }
 
        spin_lock(&sk->sk_receive_queue.lock);
-       h = (struct tpacket_hdr *)packet_lookup_frame(po, po->head);
+       h = packet_lookup_frame(po, po->head);
 
        if (h->tp_status)
                goto ring_is_full;
@@ -659,12 +657,13 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
        h->tp_snaplen = snaplen;
        h->tp_mac = macoff;
        h->tp_net = netoff;
-       if (skb->tstamp.off_sec == 0) {
+       if (skb->tstamp.tv64 == 0) {
                __net_timestamp(skb);
                sock_enable_timestamp(sk);
        }
-       h->tp_sec = skb->tstamp.off_sec;
-       h->tp_usec = skb->tstamp.off_usec;
+       tv = ktime_to_timeval(skb->tstamp);
+       h->tp_sec = tv.tv_sec;
+       h->tp_usec = tv.tv_usec;
 
        sll = (struct sockaddr_ll*)((u8*)h + TPACKET_ALIGN(sizeof(*h)));
        sll->sll_halen = 0;
@@ -769,14 +768,14 @@ static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
                goto out_unlock;
 
        skb_reserve(skb, LL_RESERVED_SPACE(dev));
-       skb->nh.raw = skb->data;
+       skb_reset_network_header(skb);
 
        if (dev->hard_header) {
                int res;
                err = -EINVAL;
                res = dev->hard_header(skb, dev, ntohs(proto), addr, NULL, len);
                if (sock->type != SOCK_DGRAM) {
-                       skb->tail = skb->data;
+                       skb_reset_tail_pointer(skb);
                        skb->len = 0;
                } else if (res < 0)
                        goto out_free;
@@ -1146,7 +1145,7 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
                aux.tp_len = PACKET_SKB_CB(skb)->origlen;
                aux.tp_snaplen = skb->len;
                aux.tp_mac = 0;
-               aux.tp_net = skb->nh.raw - skb->data;
+               aux.tp_net = skb_network_offset(skb);
 
                put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
        }
@@ -1473,7 +1472,7 @@ static int packet_notifier(struct notifier_block *this, unsigned long msg, void
 {
        struct sock *sk;
        struct hlist_node *node;
-       struct net_device *dev = (struct net_device*)data;
+       struct net_device *dev = data;
 
        read_lock(&packet_sklist_lock);
        sk_for_each(sk, node, &packet_sklist) {
@@ -1546,6 +1545,8 @@ static int packet_ioctl(struct socket *sock, unsigned int cmd,
                }
                case SIOCGSTAMP:
                        return sock_get_timestamp(sk, (struct timeval __user *)arg);
+               case SIOCGSTAMPNS:
+                       return sock_get_timestampns(sk, (struct timespec __user *)arg);
 
 #ifdef CONFIG_INET
                case SIOCADDRT:
@@ -1588,7 +1589,7 @@ static unsigned int packet_poll(struct file * file, struct socket *sock,
                unsigned last = po->head ? po->head-1 : po->frame_max;
                struct tpacket_hdr *h;
 
-               h = (struct tpacket_hdr *)packet_lookup_frame(po, last);
+               h = packet_lookup_frame(po, last);
 
                if (h->tp_status)
                        mask |= POLLIN | POLLRDNORM;