1 files changed, 42 insertions, 36 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 65afeaec15b7..176e11aaea77 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -315,7 +315,6 @@ struct tcp_splice_state {
  * is strict, actions are advisory and have some latency.
  */
 int tcp_memory_pressure __read_mostly;
-
 EXPORT_SYMBOL(tcp_memory_pressure);
 
 void tcp_enter_memory_pressure(struct sock *sk)
@@ -325,7 +324,6 @@ void tcp_enter_memory_pressure(struct sock *sk)
                 tcp_memory_pressure = 1;
         }
 }
-
 EXPORT_SYMBOL(tcp_enter_memory_pressure);
 
 /* Convert seconds to retransmits based on initial and max timeout */
@@ -460,6 +458,7 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
         }
         return mask;
 }
+EXPORT_SYMBOL(tcp_poll);
 
 int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg)
 {
@@ -508,10 +507,11 @@ int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg)
 
         return put_user(answ, (int __user *)arg);
 }
+EXPORT_SYMBOL(tcp_ioctl);
 
 static inline void tcp_mark_push(struct tcp_sock *tp, struct sk_buff *skb)
 {
-        TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_PSH;
+        TCP_SKB_CB(skb)->flags |= TCPHDR_PSH;
         tp->pushed_seq = tp->write_seq;
 }
 
@@ -527,7 +527,7 @@ static inline void skb_entail(struct sock *sk, struct sk_buff *skb)
 
         skb->csum    = 0;
         tcb->seq     = tcb->end_seq = tp->write_seq;
-        tcb->flags   = TCPCB_FLAG_ACK;
+        tcb->flags   = TCPHDR_ACK;
         tcb->sacked  = 0;
         skb_header_release(skb);
         tcp_add_write_queue_tail(sk, skb);
@@ -676,6 +676,7 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
 
         return ret;
 }
+EXPORT_SYMBOL(tcp_splice_read);
 
 struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp)
 {
@@ -816,7 +817,7 @@ new_segment:
                 skb_shinfo(skb)->gso_segs = 0;
 
                 if (!copied)
-                        TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_PSH;
+                        TCP_SKB_CB(skb)->flags &= ~TCPHDR_PSH;
 
                 copied += copy;
                 poffset += copy;
@@ -857,15 +858,15 @@ out_err:
         return sk_stream_error(sk, flags, err);
 }
 
-ssize_t tcp_sendpage(struct socket *sock, struct page *page, int offset,
-                     size_t size, int flags)
+int tcp_sendpage(struct sock *sk, struct page *page, int offset,
+                 size_t size, int flags)
 {
         ssize_t res;
-        struct sock *sk = sock->sk;
 
         if (!(sk->sk_route_caps & NETIF_F_SG) ||
             !(sk->sk_route_caps & NETIF_F_ALL_CSUM))
-                return sock_no_sendpage(sock, page, offset, size, flags);
+                return sock_no_sendpage(sk->sk_socket, page, offset, size,
+                                        flags);
 
         lock_sock(sk);
         TCP_CHECK_TIMER(sk);
@@ -874,6 +875,7 @@ ssize_t tcp_sendpage(struct socket *sock, struct page *page, int offset,
         release_sock(sk);
         return res;
 }
+EXPORT_SYMBOL(tcp_sendpage);
 
 #define TCP_PAGE(sk)    (sk->sk_sndmsg_page)
 #define TCP_OFF(sk)     (sk->sk_sndmsg_off)
@@ -898,10 +900,9 @@ static inline int select_size(struct sock *sk, int sg)
         return tmp;
 }
 
-int tcp_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
+int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
                 size_t size)
 {
-        struct sock *sk = sock->sk;
         struct iovec *iov;
         struct tcp_sock *tp = tcp_sk(sk);
         struct sk_buff *skb;
@@ -1062,7 +1063,7 @@ new_segment:
                         }
 
                         if (!copied)
-                                TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_PSH;
+                                TCP_SKB_CB(skb)->flags &= ~TCPHDR_PSH;
 
                         tp->write_seq += copy;
                         TCP_SKB_CB(skb)->end_seq += copy;
@@ -1122,6 +1123,7 @@ out_err:
         release_sock(sk);
         return err;
 }
+EXPORT_SYMBOL(tcp_sendmsg);
 
 /*
  *      Handle reading urgent data. BSD has very simple semantics for
@@ -1381,6 +1383,7 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
                 tcp_cleanup_rbuf(sk, copied);
         return copied;
 }
+EXPORT_SYMBOL(tcp_read_sock);
 
 /*
  *      This routine copies from a sock struct into the user buffer.
@@ -1775,6 +1778,7 @@ recv_urg:
         err = tcp_recv_urg(sk, msg, len, flags);
         goto out;
 }
+EXPORT_SYMBOL(tcp_recvmsg);
 
 void tcp_set_state(struct sock *sk, int state)
 {
@@ -1867,6 +1871,7 @@ void tcp_shutdown(struct sock *sk, int how)
                         tcp_send_fin(sk);
         }
 }
+EXPORT_SYMBOL(tcp_shutdown);
 
 void tcp_close(struct sock *sk, long timeout)
 {
@@ -1899,6 +1904,10 @@ void tcp_close(struct sock *sk, long timeout)
 
         sk_mem_reclaim(sk);
 
+        /* If socket has been already reset (e.g. in tcp_reset()) - kill it. */
+        if (sk->sk_state == TCP_CLOSE)
+                goto adjudge_to_death;
+
         /* As outlined in RFC 2525, section 2.17, we send a RST here because
          * data was lost. To witness the awful effects of the old behavior of
          * always doing a FIN, run an older 2.1.x kernel or 2.0.x, start a bulk
@@ -2026,6 +2035,7 @@ out:
         local_bh_enable();
         sock_put(sk);
 }
+EXPORT_SYMBOL(tcp_close);
 
 /* These states need RST on ABORT according to RFC793 */
 
@@ -2099,6 +2109,7 @@ int tcp_disconnect(struct sock *sk, int flags)
         sk->sk_error_report(sk);
         return err;
 }
+EXPORT_SYMBOL(tcp_disconnect);
 
 /*
  *      Socket option code for TCP.
@@ -2176,6 +2187,8 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
                                       GFP_KERNEL);
                         if (cvp == NULL)
                                 return -ENOMEM;
+
+                        kref_init(&cvp->kref);
                 }
                 lock_sock(sk);
                 tp->rx_opt.cookie_in_always =
@@ -2190,12 +2203,11 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
                                  */
                                 kref_put(&tp->cookie_values->kref,
                                          tcp_cookie_values_release);
-                                kref_init(&cvp->kref);
-                                tp->cookie_values = cvp;
                         } else {
                                 cvp = tp->cookie_values;
                         }
                 }
+
                 if (cvp != NULL) {
                         cvp->cookie_desired = ctd.tcpct_cookie_desired;
 
@@ -2209,6 +2221,8 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
                                 cvp->s_data_desired = ctd.tcpct_s_data_desired;
                                 cvp->s_data_constant = 0; /* false */
                         }
+
+                        tp->cookie_values = cvp;
                 }
                 release_sock(sk);
                 return err;
@@ -2397,6 +2411,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
                                                      optval, optlen);
         return do_tcp_setsockopt(sk, level, optname, optval, optlen);
 }
+EXPORT_SYMBOL(tcp_setsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
@@ -2407,7 +2422,6 @@ int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
                                                   optval, optlen);
         return do_tcp_setsockopt(sk, level, optname, optval, optlen);
 }
-
 EXPORT_SYMBOL(compat_tcp_setsockopt);
 #endif
 
@@ -2473,7 +2487,6 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
 
         info->tcpi_total_retrans = tp->total_retrans;
 }
-
 EXPORT_SYMBOL_GPL(tcp_get_info);
 
 static int do_tcp_getsockopt(struct sock *sk, int level,
@@ -2591,6 +2604,12 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
                         return -EFAULT;
                 return 0;
         }
+        case TCP_THIN_LINEAR_TIMEOUTS:
+                val = tp->thin_lto;
+                break;
+        case TCP_THIN_DUPACK:
+                val = tp->thin_dupack;
+                break;
         default:
                 return -ENOPROTOOPT;
         }
@@ -2612,6 +2631,7 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
                                                      optval, optlen);
         return do_tcp_getsockopt(sk, level, optname, optval, optlen);
 }
+EXPORT_SYMBOL(tcp_getsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_tcp_getsockopt(struct sock *sk, int level, int optname,
@@ -2622,7 +2642,6 @@ int compat_tcp_getsockopt(struct sock *sk, int level, int optname,
                                                   optval, optlen);
         return do_tcp_getsockopt(sk, level, optname, optval, optlen);
 }
-
 EXPORT_SYMBOL(compat_tcp_getsockopt);
 #endif
 
@@ -2859,7 +2878,6 @@ void tcp_free_md5sig_pool(void)
         if (pool)
                 __tcp_free_md5sig_pool(pool);
 }
-
 EXPORT_SYMBOL(tcp_free_md5sig_pool);
 
 static struct tcp_md5sig_pool * __percpu *
@@ -2935,7 +2953,6 @@ retry:
         }
         return pool;
 }
-
 EXPORT_SYMBOL(tcp_alloc_md5sig_pool);
 
 
@@ -2959,7 +2976,7 @@ struct tcp_md5sig_pool *tcp_get_md5sig_pool(void)
         spin_unlock(&tcp_md5sig_pool_lock);
 
         if (p)
-                return *per_cpu_ptr(p, smp_processor_id());
+                return *this_cpu_ptr(p);
 
         local_bh_enable();
         return NULL;
@@ -2987,7 +3004,6 @@ int tcp_md5_hash_header(struct tcp_md5sig_pool *hp,
         th->check = old_checksum;
         return err;
 }
-
 EXPORT_SYMBOL(tcp_md5_hash_header);
 
 int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
@@ -3000,6 +3016,7 @@ int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
         const unsigned head_data_len = skb_headlen(skb) > header_len ?
                                        skb_headlen(skb) - header_len : 0;
         const struct skb_shared_info *shi = skb_shinfo(skb);
+        struct sk_buff *frag_iter;
 
         sg_init_table(&sg, 1);
 
@@ -3014,9 +3031,12 @@ int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
                         return 1;
         }
 
+        skb_walk_frags(skb, frag_iter)
+                if (tcp_md5_hash_skb_data(hp, frag_iter, 0))
+                        return 1;
+
         return 0;
 }
-
 EXPORT_SYMBOL(tcp_md5_hash_skb_data);
 
 int tcp_md5_hash_key(struct tcp_md5sig_pool *hp, struct tcp_md5sig_key *key)
@@ -3026,7 +3046,6 @@ int tcp_md5_hash_key(struct tcp_md5sig_pool *hp, struct tcp_md5sig_key *key)
         sg_init_one(&sg, key->key, key->keylen);
         return crypto_hash_update(&hp->md5_desc, &sg, key->keylen);
 }
-
 EXPORT_SYMBOL(tcp_md5_hash_key);
 
 #endif
@@ -3298,16 +3317,3 @@ void __init tcp_init(void)
         tcp_secret_retiring = &tcp_secret_two;
         tcp_secret_secondary = &tcp_secret_two;
 }
-
-EXPORT_SYMBOL(tcp_close);
-EXPORT_SYMBOL(tcp_disconnect);
-EXPORT_SYMBOL(tcp_getsockopt);
-EXPORT_SYMBOL(tcp_ioctl);
-EXPORT_SYMBOL(tcp_poll);
-EXPORT_SYMBOL(tcp_read_sock);
-EXPORT_SYMBOL(tcp_recvmsg);
-EXPORT_SYMBOL(tcp_sendmsg);
-EXPORT_SYMBOL(tcp_splice_read);
-EXPORT_SYMBOL(tcp_sendpage);
-EXPORT_SYMBOL(tcp_setsockopt);
-EXPORT_SYMBOL(tcp_shutdown);