tcp: rename *_sequence_number() to *_seq_and_tsoff()

The functions that are returning tcp sequence number also setup
TS offset value, so rename them to better describe their purpose.

No functional changes in this patch.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 34 insertions, 35 deletions

diff --git a/include/net/secure_seq.h b/include/net/secure_seq.h
index 0caee631a836..fe236b3429f0 100644
--- a/include/net/secure_seq.h
+++ b/include/net/secure_seq.h
@@ -6,10 +6,10 @@
 u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
 u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
                                __be16 dport);
-u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
+u32 secure_tcp_seq_and_tsoff(__be32 saddr, __be32 daddr,
+                             __be16 sport, __be16 dport, u32 *tsoff);
+u32 secure_tcpv6_seq_and_tsoff(const __be32 *saddr, const __be32 *daddr,
                                __be16 sport, __be16 dport, u32 *tsoff);
-u32 secure_tcpv6_sequence_number(const __be32 *saddr, const __be32 *daddr,
-                                 __be16 sport, __be16 dport, u32 *tsoff);
 u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
                                 __be16 sport, __be16 dport);
 u64 secure_dccpv6_sequence_number(__be32 *saddr, __be32 *daddr,
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6ec4ea652f3f..bede8f7fa742 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1816,7 +1816,7 @@ struct tcp_request_sock_ops {
         struct dst_entry *(*route_req)(const struct sock *sk, struct flowi *fl,
                                        const struct request_sock *req,
                                        bool *strict);
-        __u32 (*init_seq)(const struct sk_buff *skb, u32 *tsoff);
+        __u32 (*init_seq_tsoff)(const struct sk_buff *skb, u32 *tsoff);
         int (*send_synack)(const struct sock *sk, struct dst_entry *dst,
                            struct flowi *fl, struct request_sock *req,
                            struct tcp_fastopen_cookie *foc,
diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c
index 758f140b6bed..fb87e78a2cc7 100644
--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -45,8 +45,8 @@ static u32 seq_scale(u32 seq)
 #endif
 
 #if IS_ENABLED(CONFIG_IPV6)
-u32 secure_tcpv6_sequence_number(const __be32 *saddr, const __be32 *daddr,
-                                 __be16 sport, __be16 dport, u32 *tsoff)
+u32 secure_tcpv6_seq_and_tsoff(const __be32 *saddr, const __be32 *daddr,
+                               __be16 sport, __be16 dport, u32 *tsoff)
 {
         const struct {
                 struct in6_addr saddr;
@@ -66,7 +66,7 @@ u32 secure_tcpv6_sequence_number(const __be32 *saddr, const __be32 *daddr,
         *tsoff = sysctl_tcp_timestamps == 1 ? (hash >> 32) : 0;
         return seq_scale(hash);
 }
-EXPORT_SYMBOL(secure_tcpv6_sequence_number);
+EXPORT_SYMBOL(secure_tcpv6_seq_and_tsoff);
 
 u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
                                __be16 dport)
@@ -89,14 +89,13 @@ EXPORT_SYMBOL(secure_ipv6_port_ephemeral);
 
 #ifdef CONFIG_INET
 
-/* secure_tcp_sequence_number(a, b, 0, d) == secure_ipv4_port_ephemeral(a, b, d),
+/* secure_tcp_seq_and_tsoff(a, b, 0, d) == secure_ipv4_port_ephemeral(a, b, d),
  * but fortunately, `sport' cannot be 0 in any circumstances. If this changes,
  * it would be easy enough to have the former function use siphash_4u32, passing
  * the arguments as separate u32.
  */
-
-u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
-                               __be16 sport, __be16 dport, u32 *tsoff)
+u32 secure_tcp_seq_and_tsoff(__be32 saddr, __be32 daddr,
+                             __be16 sport, __be16 dport, u32 *tsoff)
 {
         u64 hash;
         net_secret_init();
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 39c393cc0fd3..96b67a8b18c3 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -6324,7 +6324,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
                 goto drop_and_free;
 
         if (isn && tmp_opt.tstamp_ok)
-                af_ops->init_seq(skb, &tcp_rsk(req)->ts_off);
+                af_ops->init_seq_tsoff(skb, &tcp_rsk(req)->ts_off);
 
         if (!want_cookie && !isn) {
                 /* VJ's idea. We save last timestamp seen
@@ -6366,7 +6366,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
                         goto drop_and_release;
                 }
 
-                isn = af_ops->init_seq(skb, &tcp_rsk(req)->ts_off);
+                isn = af_ops->init_seq_tsoff(skb, &tcp_rsk(req)->ts_off);
         }
         if (!dst) {
                 dst = af_ops->route_req(sk, &fl, req, NULL);
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 9a89b8deafae..7b332ed66488 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -94,12 +94,12 @@ static int tcp_v4_md5_hash_hdr(char *md5_hash, const struct tcp_md5sig_key *key,
 struct inet_hashinfo tcp_hashinfo;
 EXPORT_SYMBOL(tcp_hashinfo);
 
-static u32 tcp_v4_init_sequence(const struct sk_buff *skb, u32 *tsoff)
+static u32 tcp_v4_init_seq_and_tsoff(const struct sk_buff *skb, u32 *tsoff)
 {
-        return secure_tcp_sequence_number(ip_hdr(skb)->daddr,
-                                          ip_hdr(skb)->saddr,
-                                          tcp_hdr(skb)->dest,
-                                          tcp_hdr(skb)->source, tsoff);
+        return secure_tcp_seq_and_tsoff(ip_hdr(skb)->daddr,
+                                        ip_hdr(skb)->saddr,
+                                        tcp_hdr(skb)->dest,
+                                        tcp_hdr(skb)->source, tsoff);
 }
 
 int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
@@ -236,11 +236,11 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
         rt = NULL;
 
         if (likely(!tp->repair)) {
-                seq = secure_tcp_sequence_number(inet->inet_saddr,
-                                                 inet->inet_daddr,
-                                                 inet->inet_sport,
-                                                 usin->sin_port,
-                                                 &tp->tsoffset);
+                seq = secure_tcp_seq_and_tsoff(inet->inet_saddr,
+                                               inet->inet_daddr,
+                                               inet->inet_sport,
+                                               usin->sin_port,
+                                               &tp->tsoffset);
                 if (!tp->write_seq)
                         tp->write_seq = seq;
         }
@@ -1249,7 +1249,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
         .cookie_init_seq =      cookie_v4_init_sequence,
 #endif
         .route_req      =       tcp_v4_route_req,
-        .init_seq       =       tcp_v4_init_sequence,
+        .init_seq_tsoff =       tcp_v4_init_seq_and_tsoff,
         .send_synack    =       tcp_v4_send_synack,
 };
 
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 60a5295a7de6..56f742fff967 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -101,12 +101,12 @@ static void inet6_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb)
         }
 }
 
-static u32 tcp_v6_init_sequence(const struct sk_buff *skb, u32 *tsoff)
+static u32 tcp_v6_init_seq_and_tsoff(const struct sk_buff *skb, u32 *tsoff)
 {
-        return secure_tcpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32,
-                                            ipv6_hdr(skb)->saddr.s6_addr32,
-                                            tcp_hdr(skb)->dest,
-                                            tcp_hdr(skb)->source, tsoff);
+        return secure_tcpv6_seq_and_tsoff(ipv6_hdr(skb)->daddr.s6_addr32,
+                                          ipv6_hdr(skb)->saddr.s6_addr32,
+                                          tcp_hdr(skb)->dest,
+                                          tcp_hdr(skb)->source, tsoff);
 }
 
 static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
@@ -287,11 +287,11 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
         sk_set_txhash(sk);
 
         if (likely(!tp->repair)) {
-                seq = secure_tcpv6_sequence_number(np->saddr.s6_addr32,
-                                                   sk->sk_v6_daddr.s6_addr32,
-                                                   inet->inet_sport,
-                                                   inet->inet_dport,
-                                                   &tp->tsoffset);
+                seq = secure_tcpv6_seq_and_tsoff(np->saddr.s6_addr32,
+                                                 sk->sk_v6_daddr.s6_addr32,
+                                                 inet->inet_sport,
+                                                 inet->inet_dport,
+                                                 &tp->tsoffset);
                 if (!tp->write_seq)
                         tp->write_seq = seq;
         }
@@ -755,7 +755,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
         .cookie_init_seq =      cookie_v6_init_sequence,
 #endif
         .route_req      =       tcp_v6_route_req,
-        .init_seq       =       tcp_v6_init_sequence,
+        .init_seq_tsoff =       tcp_v6_init_seq_and_tsoff,
         .send_synack    =       tcp_v6_send_synack,
 };