[NET]: Replace CHECKSUM_HW by CHECKSUM_PARTIAL/CHECKSUM_COMPLETE

[linux-kernel-docs/linux-2.6.git] / net / ipv4 / tcp_ipv4.c

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 25ecc6e..b2aa512 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -52,7 +52,6 @@
  *                                     a single port at the same time.
  */
 
-#include <linux/config.h>
 
 #include <linux/types.h>
 #include <linux/fcntl.h>
@@ -91,7 +90,7 @@ static struct socket *tcp_socket;
 void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
 
 struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
-       .lhash_lock     = RW_LOCK_UNLOCKED,
+       .lhash_lock     = __RW_LOCK_UNLOCKED(tcp_hashinfo.lhash_lock),
        .lhash_users    = ATOMIC_INIT(0),
        .lhash_wait     = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
 };
@@ -242,6 +241,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
                goto failure;
 
        /* OK, now commit destination to socket.  */
+       sk->sk_gso_type = SKB_GSO_TCPV4;
        sk_setup_caps(sk, &rt->u.dst);
 
        if (!tp->write_seq)
@@ -438,7 +438,6 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
                               It can f.e. if SYNs crossed.
                             */
                if (!sock_owned_by_user(sk)) {
-                       TCP_INC_STATS_BH(TCP_MIB_ATTEMPTFAILS);
                        sk->sk_err = err;
 
                        sk->sk_error_report(sk);
@@ -485,7 +484,7 @@ void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
        struct inet_sock *inet = inet_sk(sk);
        struct tcphdr *th = skb->h.th;
 
-       if (skb->ip_summed == CHECKSUM_HW) {
+       if (skb->ip_summed == CHECKSUM_PARTIAL) {
                th->check = ~tcp_v4_check(th, len, inet->saddr, inet->daddr, 0);
                skb->csum = offsetof(struct tcphdr, check);
        } else {
@@ -496,6 +495,24 @@ void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
        }
 }
 
+int tcp_v4_gso_send_check(struct sk_buff *skb)
+{
+       struct iphdr *iph;
+       struct tcphdr *th;
+
+       if (!pskb_may_pull(skb, sizeof(*th)))
+               return -EINVAL;
+
+       iph = skb->nh.iph;
+       th = skb->h.th;
+
+       th->check = 0;
+       th->check = ~tcp_v4_check(th, skb->len, iph->saddr, iph->daddr, 0);
+       skb->csum = offsetof(struct tcphdr, check);
+       skb->ip_summed = CHECKSUM_PARTIAL;
+       return 0;
+}
+
 /*
  *     This routine will send an RST to the other tcp.
  *
@@ -781,6 +798,9 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 
        tcp_openreq_init(req, &tmp_opt, skb);
 
+       if (security_inet_conn_request(sk, skb, req))
+               goto drop_and_free;
+
        ireq = inet_rsk(req);
        ireq->loc_addr = daddr;
        ireq->rmt_addr = saddr;
@@ -856,7 +876,6 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 drop_and_free:
        reqsk_free(req);
 drop:
-       TCP_INC_STATS_BH(TCP_MIB_ATTEMPTFAILS);
        return 0;
 }
 
@@ -884,6 +903,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
        if (!newsk)
                goto exit;
 
+       newsk->sk_gso_type = SKB_GSO_TCPV4;
        sk_setup_caps(newsk, dst);
 
        newtp                 = tcp_sk(newsk);
@@ -953,7 +973,7 @@ static struct sock *tcp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
 
 static int tcp_v4_checksum_init(struct sk_buff *skb)
 {
-       if (skb->ip_summed == CHECKSUM_HW) {
+       if (skb->ip_summed == CHECKSUM_COMPLETE) {
                if (!tcp_v4_check(skb->h.th, skb->len, skb->nh.iph->saddr,
                                  skb->nh.iph->daddr, skb->csum)) {
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -1089,7 +1109,7 @@ process:
 
        skb->dev = NULL;
 
-       bh_lock_sock(sk);
+       bh_lock_sock_nested(sk);
        ret = 0;
        if (!sock_owned_by_user(sk)) {
 #ifdef CONFIG_NET_DMA
@@ -1621,10 +1641,9 @@ static int tcp_seq_open(struct inode *inode, struct file *file)
        if (unlikely(afinfo == NULL))
                return -EINVAL;
 
-       s = kmalloc(sizeof(*s), GFP_KERNEL);
+       s = kzalloc(sizeof(*s), GFP_KERNEL);
        if (!s)
                return -ENOMEM;
-       memset(s, 0, sizeof(*s));
        s->family               = afinfo->family;
        s->seq_ops.start        = tcp_seq_start;
        s->seq_ops.next         = tcp_seq_next;
@@ -1726,7 +1745,8 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i)
        sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX "
                        "%08X %5d %8d %lu %d %p %u %u %u %u %d",
                i, src, srcp, dest, destp, sp->sk_state,
-               tp->write_seq - tp->snd_una, tp->rcv_nxt - tp->copied_seq,
+               tp->write_seq - tp->snd_una,
+               (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog : (tp->rcv_nxt - tp->copied_seq),
                timer_active,
                jiffies_to_clock_t(timer_expires - jiffies),
                icsk->icsk_retransmits,