1 files changed, 132 insertions, 204 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 97a230026e13..a2b06d0cc26b 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -5,8 +5,6 @@
  *
  *              Implementation of the Transmission Control Protocol(TCP).
  *
- * Version:     $Id: tcp_ipv4.c,v 1.240 2002/02/01 22:01:04 davem Exp $
- *
  *              IPv4 specific functions
  *
  *
@@ -85,18 +83,18 @@
 int sysctl_tcp_tw_reuse __read_mostly;
 int sysctl_tcp_low_latency __read_mostly;
 
-/* Check TCP sequence numbers in ICMP packets. */
-#define ICMP_MIN_LENGTH 8
-
-void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
 
 #ifdef CONFIG_TCP_MD5SIG
 static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk,
                                                    __be32 addr);
-static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
-                                   __be32 saddr, __be32 daddr,
-                                   struct tcphdr *th, int protocol,
-                                   unsigned int tcplen);
+static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
+                               __be32 daddr, __be32 saddr, struct tcphdr *th);
+#else
+static inline
+struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
+{
+        return NULL;
+}
 #endif
 
 struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
@@ -176,7 +174,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
                                inet->sport, usin->sin_port, sk, 1);
         if (tmp < 0) {
                 if (tmp == -ENETUNREACH)
-                        IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+                        IP_INC_STATS_BH(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
                 return tmp;
         }
 
@@ -344,16 +342,17 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
         struct sock *sk;
         __u32 seq;
         int err;
+        struct net *net = dev_net(skb->dev);
 
         if (skb->len < (iph->ihl << 2) + 8) {
-                ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+                ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
                 return;
         }
 
-        sk = inet_lookup(dev_net(skb->dev), &tcp_hashinfo, iph->daddr, th->dest,
+        sk = inet_lookup(net, &tcp_hashinfo, iph->daddr, th->dest,
                         iph->saddr, th->source, inet_iif(skb));
         if (!sk) {
-                ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+                ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
                 return;
         }
         if (sk->sk_state == TCP_TIME_WAIT) {
@@ -366,7 +365,7 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
          * servers this needs to be solved differently.
          */
         if (sock_owned_by_user(sk))
-                NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS);
+                NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS);
 
         if (sk->sk_state == TCP_CLOSE)
                 goto out;
@@ -375,7 +374,7 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
         seq = ntohl(th->seq);
         if (sk->sk_state != TCP_LISTEN &&
             !between(seq, tp->snd_una, tp->snd_nxt)) {
-                NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+                NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
                 goto out;
         }
 
@@ -419,10 +418,10 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
                 /* ICMPs are not backlogged, hence we cannot get
                    an established socket here.
                  */
-                BUG_TRAP(!req->sk);
+                WARN_ON(req->sk);
 
                 if (seq != tcp_rsk(req)->snt_isn) {
-                        NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+                        NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
                         goto out;
                 }
 
@@ -544,6 +543,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
 #ifdef CONFIG_TCP_MD5SIG
         struct tcp_md5sig_key *key;
 #endif
+        struct net *net;
 
         /* Never send a reset in response to a reset. */
         if (th->rst)
@@ -582,12 +582,9 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
                 arg.iov[0].iov_len += TCPOLEN_MD5SIG_ALIGNED;
                 rep.th.doff = arg.iov[0].iov_len / 4;
 
-                tcp_v4_do_calc_md5_hash((__u8 *)&rep.opt[1],
-                                        key,
-                                        ip_hdr(skb)->daddr,
-                                        ip_hdr(skb)->saddr,
-                                        &rep.th, IPPROTO_TCP,
-                                        arg.iov[0].iov_len);
+                tcp_v4_md5_hash_hdr((__u8 *) &rep.opt[1],
+                                     key, ip_hdr(skb)->daddr,
+                                     ip_hdr(skb)->saddr, &rep.th);
         }
 #endif
         arg.csum = csum_tcpudp_nofold(ip_hdr(skb)->daddr,
@@ -595,20 +592,21 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
                                       sizeof(struct tcphdr), IPPROTO_TCP, 0);
         arg.csumoffset = offsetof(struct tcphdr, check) / 2;
 
-        ip_send_reply(dev_net(skb->dst->dev)->ipv4.tcp_sock, skb,
+        net = dev_net(skb->dst->dev);
+        ip_send_reply(net->ipv4.tcp_sock, skb,
                       &arg, arg.iov[0].iov_len);
 
-        TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
-        TCP_INC_STATS_BH(TCP_MIB_OUTRSTS);
+        TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
+        TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
 }
 
 /* The code following below sending ACKs in SYN-RECV and TIME-WAIT states
    outside socket context is ugly, certainly. What can I do?
  */
 
-static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
-                            struct sk_buff *skb, u32 seq, u32 ack,
-                            u32 win, u32 ts)
+static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
+                            u32 win, u32 ts, int oif,
+                            struct tcp_md5sig_key *key)
 {
         struct tcphdr *th = tcp_hdr(skb);
         struct {
@@ -620,10 +618,7 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
                         ];
         } rep;
         struct ip_reply_arg arg;
-#ifdef CONFIG_TCP_MD5SIG
-        struct tcp_md5sig_key *key;
-        struct tcp_md5sig_key tw_key;
-#endif
+        struct net *net = dev_net(skb->dev);
 
         memset(&rep.th, 0, sizeof(struct tcphdr));
         memset(&arg, 0, sizeof(arg));
@@ -649,23 +644,6 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
         rep.th.window  = htons(win);
 
 #ifdef CONFIG_TCP_MD5SIG
-        /*
-         * The SKB holds an imcoming packet, but may not have a valid ->sk
-         * pointer. This is especially the case when we're dealing with a
-         * TIME_WAIT ack, because the sk structure is long gone, and only
-         * the tcp_timewait_sock remains. So the md5 key is stashed in that
-         * structure, and we use it in preference.  I believe that (twsk ||
-         * skb->sk) holds true, but we program defensively.
-         */
-        if (!twsk && skb->sk) {
-                key = tcp_v4_md5_do_lookup(skb->sk, ip_hdr(skb)->daddr);
-        } else if (twsk && twsk->tw_md5_keylen) {
-                tw_key.key = twsk->tw_md5_key;
-                tw_key.keylen = twsk->tw_md5_keylen;
-                key = &tw_key;
-        } else
-                key = NULL;
-
         if (key) {
                 int offset = (ts) ? 3 : 0;
 
@@ -676,25 +654,22 @@ static void tcp_v4_send_ack(struct tcp_timewait_sock *twsk,
                 arg.iov[0].iov_len += TCPOLEN_MD5SIG_ALIGNED;
                 rep.th.doff = arg.iov[0].iov_len/4;
 
-                tcp_v4_do_calc_md5_hash((__u8 *)&rep.opt[offset],
-                                        key,
-                                        ip_hdr(skb)->daddr,
-                                        ip_hdr(skb)->saddr,
-                                        &rep.th, IPPROTO_TCP,
-                                        arg.iov[0].iov_len);
+                tcp_v4_md5_hash_hdr((__u8 *) &rep.opt[offset],
+                                    key, ip_hdr(skb)->daddr,
+                                    ip_hdr(skb)->saddr, &rep.th);
         }
 #endif
         arg.csum = csum_tcpudp_nofold(ip_hdr(skb)->daddr,
                                       ip_hdr(skb)->saddr, /* XXX */
                                       arg.iov[0].iov_len, IPPROTO_TCP, 0);
         arg.csumoffset = offsetof(struct tcphdr, check) / 2;
-        if (twsk)
-                arg.bound_dev_if = twsk->tw_sk.tw_bound_dev_if;
+        if (oif)
+                arg.bound_dev_if = oif;
 
-        ip_send_reply(dev_net(skb->dev)->ipv4.tcp_sock, skb,
+        ip_send_reply(net->ipv4.tcp_sock, skb,
                       &arg, arg.iov[0].iov_len);
 
-        TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
+        TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
 }
 
 static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
@@ -702,9 +677,12 @@ static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
         struct inet_timewait_sock *tw = inet_twsk(sk);
         struct tcp_timewait_sock *tcptw = tcp_twsk(sk);
 
-        tcp_v4_send_ack(tcptw, skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
+        tcp_v4_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
                         tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
-                        tcptw->tw_ts_recent);
+                        tcptw->tw_ts_recent,
+                        tw->tw_bound_dev_if,
+                        tcp_twsk_md5_key(tcptw)
+                        );
 
         inet_twsk_put(tw);
 }
@@ -712,9 +690,11 @@ static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
 static void tcp_v4_reqsk_send_ack(struct sk_buff *skb,
                                   struct request_sock *req)
 {
-        tcp_v4_send_ack(NULL, skb, tcp_rsk(req)->snt_isn + 1,
+        tcp_v4_send_ack(skb, tcp_rsk(req)->snt_isn + 1,
                         tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd,
-                        req->ts_recent);
+                        req->ts_recent,
+                        0,
+                        tcp_v4_md5_do_lookup(skb->sk, ip_hdr(skb)->daddr));
 }
 
 /*
@@ -1004,32 +984,13 @@ static int tcp_v4_parse_md5_keys(struct sock *sk, char __user *optval,
                                  newkey, cmd.tcpm_keylen);
 }
 
-static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
-                                   __be32 saddr, __be32 daddr,
-                                   struct tcphdr *th, int protocol,
-                                   unsigned int tcplen)
+static int tcp_v4_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp,
+                                        __be32 daddr, __be32 saddr, int nbytes)
 {
-        struct scatterlist sg[4];
-        __u16 data_len;
-        int block = 0;
-        __sum16 old_checksum;
-        struct tcp_md5sig_pool *hp;
         struct tcp4_pseudohdr *bp;
-        struct hash_desc *desc;
-        int err;
-        unsigned int nbytes = 0;
-
-        /*
-         * Okay, so RFC2385 is turned on for this connection,
-         * so we need to generate the MD5 hash for the packet now.
-         */
-
-        hp = tcp_get_md5sig_pool();
-        if (!hp)
-                goto clear_hash_noput;
+        struct scatterlist sg;
 
         bp = &hp->md5_blk.ip4;
-        desc = &hp->md5_desc;
 
         /*
          * 1. the TCP pseudo-header (in the order: source IP address,
@@ -1039,86 +1000,96 @@ static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
         bp->saddr = saddr;
         bp->daddr = daddr;
         bp->pad = 0;
-        bp->protocol = protocol;
-        bp->len = htons(tcplen);
+        bp->protocol = IPPROTO_TCP;
+        bp->len = cpu_to_be16(nbytes);
 
-        sg_init_table(sg, 4);
-
-        sg_set_buf(&sg[block++], bp, sizeof(*bp));
-        nbytes += sizeof(*bp);
-
-        /* 2. the TCP header, excluding options, and assuming a
-         * checksum of zero/
-         */
-        old_checksum = th->check;
-        th->check = 0;
-        sg_set_buf(&sg[block++], th, sizeof(struct tcphdr));
-        nbytes += sizeof(struct tcphdr);
-
-        /* 3. the TCP segment data (if any) */
-        data_len = tcplen - (th->doff << 2);
-        if (data_len > 0) {
-                unsigned char *data = (unsigned char *)th + (th->doff << 2);
-                sg_set_buf(&sg[block++], data, data_len);
-                nbytes += data_len;
-        }
+        sg_init_one(&sg, bp, sizeof(*bp));
+        return crypto_hash_update(&hp->md5_desc, &sg, sizeof(*bp));
+}
 
-        /* 4. an independently-specified key or password, known to both
-         * TCPs and presumably connection-specific
-         */
-        sg_set_buf(&sg[block++], key->key, key->keylen);
-        nbytes += key->keylen;
+static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
+                               __be32 daddr, __be32 saddr, struct tcphdr *th)
+{
+        struct tcp_md5sig_pool *hp;
+        struct hash_desc *desc;
 
-        sg_mark_end(&sg[block - 1]);
+        hp = tcp_get_md5sig_pool();
+        if (!hp)
+                goto clear_hash_noput;
+        desc = &hp->md5_desc;
 
-        /* Now store the Hash into the packet */
-        err = crypto_hash_init(desc);
-        if (err)
+        if (crypto_hash_init(desc))
                 goto clear_hash;
-        err = crypto_hash_update(desc, sg, nbytes);
-        if (err)
+        if (tcp_v4_md5_hash_pseudoheader(hp, daddr, saddr, th->doff << 2))
                 goto clear_hash;
-        err = crypto_hash_final(desc, md5_hash);
-        if (err)
+        if (tcp_md5_hash_header(hp, th))
+                goto clear_hash;
+        if (tcp_md5_hash_key(hp, key))
+                goto clear_hash;
+        if (crypto_hash_final(desc, md5_hash))
                 goto clear_hash;
 
-        /* Reset header, and free up the crypto */
         tcp_put_md5sig_pool();
-        th->check = old_checksum;
-
-out:
         return 0;
+
 clear_hash:
         tcp_put_md5sig_pool();
 clear_hash_noput:
         memset(md5_hash, 0, 16);
-        goto out;
+        return 1;
 }
 
-int tcp_v4_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
-                         struct sock *sk,
-                         struct dst_entry *dst,
-                         struct request_sock *req,
-                         struct tcphdr *th, int protocol,
-                         unsigned int tcplen)
+int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
+                        struct sock *sk, struct request_sock *req,
+                        struct sk_buff *skb)
 {
+        struct tcp_md5sig_pool *hp;
+        struct hash_desc *desc;
+        struct tcphdr *th = tcp_hdr(skb);
         __be32 saddr, daddr;
 
         if (sk) {
                 saddr = inet_sk(sk)->saddr;
                 daddr = inet_sk(sk)->daddr;
+        } else if (req) {
+                saddr = inet_rsk(req)->loc_addr;
+                daddr = inet_rsk(req)->rmt_addr;
         } else {
-                struct rtable *rt = (struct rtable *)dst;
-                BUG_ON(!rt);
-                saddr = rt->rt_src;
-                daddr = rt->rt_dst;
+                const struct iphdr *iph = ip_hdr(skb);
+                saddr = iph->saddr;
+                daddr = iph->daddr;
         }
-        return tcp_v4_do_calc_md5_hash(md5_hash, key,
-                                       saddr, daddr,
-                                       th, protocol, tcplen);
+
+        hp = tcp_get_md5sig_pool();
+        if (!hp)
+                goto clear_hash_noput;
+        desc = &hp->md5_desc;
+
+        if (crypto_hash_init(desc))
+                goto clear_hash;
+
+        if (tcp_v4_md5_hash_pseudoheader(hp, daddr, saddr, skb->len))
+                goto clear_hash;
+        if (tcp_md5_hash_header(hp, th))
+                goto clear_hash;
+        if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2))
+                goto clear_hash;
+        if (tcp_md5_hash_key(hp, key))
+                goto clear_hash;
+        if (crypto_hash_final(desc, md5_hash))
+                goto clear_hash;
+
+        tcp_put_md5sig_pool();
+        return 0;
+
+clear_hash:
+        tcp_put_md5sig_pool();
+clear_hash_noput:
+        memset(md5_hash, 0, 16);
+        return 1;
 }
 
-EXPORT_SYMBOL(tcp_v4_calc_md5_hash);
+EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
 
 static int tcp_v4_inbound_md5_hash(struct sock *sk, struct sk_buff *skb)
 {
@@ -1134,52 +1105,12 @@ static int tcp_v4_inbound_md5_hash(struct sock *sk, struct sk_buff *skb)
         struct tcp_md5sig_key *hash_expected;
         const struct iphdr *iph = ip_hdr(skb);
         struct tcphdr *th = tcp_hdr(skb);
-        int length = (th->doff << 2) - sizeof(struct tcphdr);
         int genhash;
-        unsigned char *ptr;
         unsigned char newhash[16];
 
         hash_expected = tcp_v4_md5_do_lookup(sk, iph->saddr);
+        hash_location = tcp_parse_md5sig_option(th);
 
-        /*
-         * If the TCP option length is less than the TCP_MD5SIG
-         * option length, then we can shortcut
-         */
-        if (length < TCPOLEN_MD5SIG) {
-                if (hash_expected)
-                        return 1;
-                else
-                        return 0;
-        }
-
-        /* Okay, we can't shortcut - we have to grub through the options */
-        ptr = (unsigned char *)(th + 1);
-        while (length > 0) {
-                int opcode = *ptr++;
-                int opsize;
-
-                switch (opcode) {
-                case TCPOPT_EOL:
-                        goto done_opts;
-                case TCPOPT_NOP:
-                        length--;
-                        continue;
-                default:
-                        opsize = *ptr++;
-                        if (opsize < 2)
-                                goto done_opts;
-                        if (opsize > length)
-                                goto done_opts;
-
-                        if (opcode == TCPOPT_MD5SIG) {
-                                hash_location = ptr;
-                                goto done_opts;
-                        }
-                }
-                ptr += opsize-2;
-                length -= opsize;
-        }
-done_opts:
         /* We've parsed the options - do we have a hash? */
         if (!hash_expected && !hash_location)
                 return 0;
@@ -1203,11 +1134,9 @@ done_opts:
         /* Okay, so this is hash_expected and hash_location -
          * so we need to calculate the checksum.
          */
-        genhash = tcp_v4_do_calc_md5_hash(newhash,
-                                          hash_expected,
-                                          iph->saddr, iph->daddr,
-                                          th, sk->sk_protocol,
-                                          skb->len);
+        genhash = tcp_v4_md5_hash_skb(newhash,
+                                      hash_expected,
+                                      NULL, NULL, skb);
 
         if (genhash || memcmp(hash_location, newhash, 16) != 0) {
                 if (net_ratelimit()) {
@@ -1351,7 +1280,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
                         if (get_seconds() < peer->tcp_ts_stamp + TCP_PAWS_MSL &&
                             (s32)(peer->tcp_ts - req->ts_recent) >
                                                         TCP_PAWS_WINDOW) {
-                                NET_INC_STATS_BH(LINUX_MIB_PAWSPASSIVEREJECTED);
+                                NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
                                 goto drop_and_release;
                         }
                 }
@@ -1456,6 +1385,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
                 if (newkey != NULL)
                         tcp_v4_md5_do_add(newsk, inet_sk(sk)->daddr,
                                           newkey, key->keylen);
+                newsk->sk_route_caps &= ~NETIF_F_GSO_MASK;
         }
 #endif
 
@@ -1465,9 +1395,9 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
         return newsk;
 
 exit_overflow:
-        NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS);
+        NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
 exit:
-        NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS);
+        NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
         dst_release(dst);
         return NULL;
 }
@@ -1594,7 +1524,7 @@ discard:
         return 0;
 
 csum_err:
-        TCP_INC_STATS_BH(TCP_MIB_INERRS);
+        TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_INERRS);
         goto discard;
 }
 
@@ -1608,12 +1538,13 @@ int tcp_v4_rcv(struct sk_buff *skb)
         struct tcphdr *th;
         struct sock *sk;
         int ret;
+        struct net *net = dev_net(skb->dev);
 
         if (skb->pkt_type != PACKET_HOST)
                 goto discard_it;
 
         /* Count it even if it's bad */
-        TCP_INC_STATS_BH(TCP_MIB_INSEGS);
+        TCP_INC_STATS_BH(net, TCP_MIB_INSEGS);
 
         if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
                 goto discard_it;
@@ -1642,7 +1573,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
         TCP_SKB_CB(skb)->flags   = iph->tos;
         TCP_SKB_CB(skb)->sacked  = 0;
 
-        sk = __inet_lookup(dev_net(skb->dev), &tcp_hashinfo, iph->saddr,
+        sk = __inet_lookup(net, &tcp_hashinfo, iph->saddr,
                         th->source, iph->daddr, th->dest, inet_iif(skb));
         if (!sk)
                 goto no_tcp_socket;
@@ -1689,7 +1620,7 @@ no_tcp_socket:
 
         if (skb->len < (th->doff << 2) || tcp_checksum_complete(skb)) {
 bad_packet:
-                TCP_INC_STATS_BH(TCP_MIB_INERRS);
+                TCP_INC_STATS_BH(net, TCP_MIB_INERRS);
         } else {
                 tcp_v4_send_reset(NULL, skb);
         }
@@ -1710,7 +1641,7 @@ do_time_wait:
         }
 
         if (skb->len < (th->doff << 2) || tcp_checksum_complete(skb)) {
-                TCP_INC_STATS_BH(TCP_MIB_INERRS);
+                TCP_INC_STATS_BH(net, TCP_MIB_INERRS);
                 inet_twsk_put(inet_twsk(sk));
                 goto discard_it;
         }
@@ -1818,7 +1749,7 @@ struct inet_connection_sock_af_ops ipv4_specific = {
 #ifdef CONFIG_TCP_MD5SIG
 static struct tcp_sock_af_ops tcp_sock_ipv4_specific = {
         .md5_lookup             = tcp_v4_md5_lookup,
-        .calc_md5_hash          = tcp_v4_calc_md5_hash,
+        .calc_md5_hash          = tcp_v4_md5_hash_skb,
         .md5_add                = tcp_v4_md5_add_func,
         .md5_parse              = tcp_v4_parse_md5_keys,
 };
@@ -1875,7 +1806,7 @@ static int tcp_v4_init_sock(struct sock *sk)
         return 0;
 }
 
-int tcp_v4_destroy_sock(struct sock *sk)
+void tcp_v4_destroy_sock(struct sock *sk)
 {
         struct tcp_sock *tp = tcp_sk(sk);
 
@@ -1919,8 +1850,6 @@ int tcp_v4_destroy_sock(struct sock *sk)
         }
 
         atomic_dec(&tcp_sockets_allocated);
-
-        return 0;
 }
 
 EXPORT_SYMBOL(tcp_v4_destroy_sock);
@@ -1963,8 +1892,7 @@ static void *listening_get_next(struct seq_file *seq, void *cur)
                 req = req->dl_next;
                 while (1) {
                         while (req) {
-                                if (req->rsk_ops->family == st->family &&
-                                    net_eq(sock_net(req->sk), net)) {
+                                if (req->rsk_ops->family == st->family) {
                                         cur = req;
                                         goto out;
                                 }
@@ -2295,7 +2223,7 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len)
         }
 
         seq_printf(f, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX "
-                        "%08X %5d %8d %lu %d %p %u %u %u %u %d%n",
+                        "%08X %5d %8d %lu %d %p %lu %lu %u %u %d%n",
                 i, src, srcp, dest, destp, sk->sk_state,
                 tp->write_seq - tp->snd_una,
                 sk->sk_state == TCP_LISTEN ? sk->sk_ack_backlog :
@@ -2307,8 +2235,8 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len)
                 icsk->icsk_probes_out,
                 sock_i_ino(sk),
                 atomic_read(&sk->sk_refcnt), sk,
-                icsk->icsk_rto,
-                icsk->icsk_ack.ato,
+                jiffies_to_clock_t(icsk->icsk_rto),
+                jiffies_to_clock_t(icsk->icsk_ack.ato),
                 (icsk->icsk_ack.quick << 1) | icsk->icsk_ack.pingpong,
                 tp->snd_cwnd,
                 tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh,