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-rw-r--r--include/net/tcp.h14
-rw-r--r--include/net/tcp_ecn.h130
-rw-r--r--net/ipv4/tcp_input.c50
-rw-r--r--net/ipv4/tcp_minisocks.c6
-rw-r--r--net/ipv4/tcp_output.c50
5 files changed, 118 insertions, 132 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 54053de0bdd..dde04afbe0a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -39,6 +39,7 @@
#include <net/snmp.h>
#include <net/ip.h>
#include <net/tcp_states.h>
+#include <net/inet_ecn.h>
#include <linux/seq_file.h>
@@ -330,6 +331,17 @@ static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
rx_opt->tstamp_ok = rx_opt->sack_ok = rx_opt->wscale_ok = rx_opt->snd_wscale = 0;
}
+#define TCP_ECN_OK 1
+#define TCP_ECN_QUEUE_CWR 2
+#define TCP_ECN_DEMAND_CWR 4
+
+static __inline__ void
+TCP_ECN_create_request(struct request_sock *req, struct tcphdr *th)
+{
+ if (sysctl_tcp_ecn && th->ece && th->cwr)
+ inet_rsk(req)->ecn_ok = 1;
+}
+
enum tcp_tw_status
{
TCP_TW_SUCCESS = 0,
@@ -573,8 +585,6 @@ struct tcp_skb_cb {
#define TCP_SKB_CB(__skb) ((struct tcp_skb_cb *)&((__skb)->cb[0]))
-#include <net/tcp_ecn.h>
-
/* Due to TSO, an SKB can be composed of multiple actual
* packets. To keep these tracked properly, we use this.
*/
diff --git a/include/net/tcp_ecn.h b/include/net/tcp_ecn.h
deleted file mode 100644
index 89eb3e05116..00000000000
--- a/include/net/tcp_ecn.h
+++ /dev/null
@@ -1,130 +0,0 @@
-#ifndef _NET_TCP_ECN_H_
-#define _NET_TCP_ECN_H_ 1
-
-#include <net/inet_ecn.h>
-#include <net/request_sock.h>
-
-#define TCP_HP_BITS (~(TCP_RESERVED_BITS|TCP_FLAG_PSH))
-
-#define TCP_ECN_OK 1
-#define TCP_ECN_QUEUE_CWR 2
-#define TCP_ECN_DEMAND_CWR 4
-
-static inline void TCP_ECN_queue_cwr(struct tcp_sock *tp)
-{
- if (tp->ecn_flags&TCP_ECN_OK)
- tp->ecn_flags |= TCP_ECN_QUEUE_CWR;
-}
-
-
-/* Output functions */
-
-static inline void TCP_ECN_send_synack(struct tcp_sock *tp,
- struct sk_buff *skb)
-{
- TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_CWR;
- if (!(tp->ecn_flags&TCP_ECN_OK))
- TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_ECE;
-}
-
-static inline void TCP_ECN_send_syn(struct sock *sk, struct sk_buff *skb)
-{
- struct tcp_sock *tp = tcp_sk(sk);
-
- tp->ecn_flags = 0;
- if (sysctl_tcp_ecn) {
- TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_ECE|TCPCB_FLAG_CWR;
- tp->ecn_flags = TCP_ECN_OK;
- }
-}
-
-static __inline__ void
-TCP_ECN_make_synack(struct request_sock *req, struct tcphdr *th)
-{
- if (inet_rsk(req)->ecn_ok)
- th->ece = 1;
-}
-
-static inline void TCP_ECN_send(struct sock *sk, struct sk_buff *skb,
- int tcp_header_len)
-{
- struct tcp_sock *tp = tcp_sk(sk);
-
- if (tp->ecn_flags & TCP_ECN_OK) {
- /* Not-retransmitted data segment: set ECT and inject CWR. */
- if (skb->len != tcp_header_len &&
- !before(TCP_SKB_CB(skb)->seq, tp->snd_nxt)) {
- INET_ECN_xmit(sk);
- if (tp->ecn_flags&TCP_ECN_QUEUE_CWR) {
- tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR;
- tcp_hdr(skb)->cwr = 1;
- skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
- }
- } else {
- /* ACK or retransmitted segment: clear ECT|CE */
- INET_ECN_dontxmit(sk);
- }
- if (tp->ecn_flags & TCP_ECN_DEMAND_CWR)
- tcp_hdr(skb)->ece = 1;
- }
-}
-
-/* Input functions */
-
-static inline void TCP_ECN_accept_cwr(struct tcp_sock *tp, struct sk_buff *skb)
-{
- if (tcp_hdr(skb)->cwr)
- tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
-}
-
-static inline void TCP_ECN_withdraw_cwr(struct tcp_sock *tp)
-{
- tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
-}
-
-static inline void TCP_ECN_check_ce(struct tcp_sock *tp, struct sk_buff *skb)
-{
- if (tp->ecn_flags&TCP_ECN_OK) {
- if (INET_ECN_is_ce(TCP_SKB_CB(skb)->flags))
- tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
- /* Funny extension: if ECT is not set on a segment,
- * it is surely retransmit. It is not in ECN RFC,
- * but Linux follows this rule. */
- else if (INET_ECN_is_not_ect((TCP_SKB_CB(skb)->flags)))
- tcp_enter_quickack_mode((struct sock *)tp);
- }
-}
-
-static inline void TCP_ECN_rcv_synack(struct tcp_sock *tp, struct tcphdr *th)
-{
- if ((tp->ecn_flags&TCP_ECN_OK) && (!th->ece || th->cwr))
- tp->ecn_flags &= ~TCP_ECN_OK;
-}
-
-static inline void TCP_ECN_rcv_syn(struct tcp_sock *tp, struct tcphdr *th)
-{
- if ((tp->ecn_flags&TCP_ECN_OK) && (!th->ece || !th->cwr))
- tp->ecn_flags &= ~TCP_ECN_OK;
-}
-
-static inline int TCP_ECN_rcv_ecn_echo(struct tcp_sock *tp, struct tcphdr *th)
-{
- if (th->ece && !th->syn && (tp->ecn_flags&TCP_ECN_OK))
- return 1;
- return 0;
-}
-
-static inline void TCP_ECN_openreq_child(struct tcp_sock *tp,
- struct request_sock *req)
-{
- tp->ecn_flags = inet_rsk(req)->ecn_ok ? TCP_ECN_OK : 0;
-}
-
-static __inline__ void
-TCP_ECN_create_request(struct request_sock *req, struct tcphdr *th)
-{
- if (sysctl_tcp_ecn && th->ece && th->cwr)
- inet_rsk(req)->ecn_ok = 1;
-}
-
-#endif
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 29999ef73b4..ea690afa592 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -118,6 +118,7 @@ int sysctl_tcp_abc __read_mostly;
#define IsSackFrto() (sysctl_tcp_frto == 0x2)
#define TCP_REMNANT (TCP_FLAG_FIN|TCP_FLAG_URG|TCP_FLAG_SYN|TCP_FLAG_PSH)
+#define TCP_HP_BITS (~(TCP_RESERVED_BITS|TCP_FLAG_PSH))
/* Adapt the MSS value used to make delayed ack decision to the
* real world.
@@ -198,6 +199,55 @@ static inline int tcp_in_quickack_mode(const struct sock *sk)
return icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong;
}
+static inline void TCP_ECN_queue_cwr(struct tcp_sock *tp)
+{
+ if (tp->ecn_flags&TCP_ECN_OK)
+ tp->ecn_flags |= TCP_ECN_QUEUE_CWR;
+}
+
+static inline void TCP_ECN_accept_cwr(struct tcp_sock *tp, struct sk_buff *skb)
+{
+ if (tcp_hdr(skb)->cwr)
+ tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
+}
+
+static inline void TCP_ECN_withdraw_cwr(struct tcp_sock *tp)
+{
+ tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
+}
+
+static inline void TCP_ECN_check_ce(struct tcp_sock *tp, struct sk_buff *skb)
+{
+ if (tp->ecn_flags&TCP_ECN_OK) {
+ if (INET_ECN_is_ce(TCP_SKB_CB(skb)->flags))
+ tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
+ /* Funny extension: if ECT is not set on a segment,
+ * it is surely retransmit. It is not in ECN RFC,
+ * but Linux follows this rule. */
+ else if (INET_ECN_is_not_ect((TCP_SKB_CB(skb)->flags)))
+ tcp_enter_quickack_mode((struct sock *)tp);
+ }
+}
+
+static inline void TCP_ECN_rcv_synack(struct tcp_sock *tp, struct tcphdr *th)
+{
+ if ((tp->ecn_flags&TCP_ECN_OK) && (!th->ece || th->cwr))
+ tp->ecn_flags &= ~TCP_ECN_OK;
+}
+
+static inline void TCP_ECN_rcv_syn(struct tcp_sock *tp, struct tcphdr *th)
+{
+ if ((tp->ecn_flags&TCP_ECN_OK) && (!th->ece || !th->cwr))
+ tp->ecn_flags &= ~TCP_ECN_OK;
+}
+
+static inline int TCP_ECN_rcv_ecn_echo(struct tcp_sock *tp, struct tcphdr *th)
+{
+ if (th->ece && !th->syn && (tp->ecn_flags&TCP_ECN_OK))
+ return 1;
+ return 0;
+}
+
/* Buffer size and advertised window tuning.
*
* 1. Tuning sk->sk_sndbuf, when connection enters established state.
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index a12b08fca5a..36a8fbd0e64 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -368,6 +368,12 @@ void tcp_twsk_destructor(struct sock *sk)
EXPORT_SYMBOL_GPL(tcp_twsk_destructor);
+static inline void TCP_ECN_openreq_child(struct tcp_sock *tp,
+ struct request_sock *req)
+{
+ tp->ecn_flags = inet_rsk(req)->ecn_ok ? TCP_ECN_OK : 0;
+}
+
/* This is not only more efficient than what we used to do, it eliminates
* a lot of code duplication between IPv4/IPv6 SYN recv processing. -DaveM
*
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index b11025e8a49..3abe22e4b57 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -269,6 +269,56 @@ static u16 tcp_select_window(struct sock *sk)
return new_win;
}
+static inline void TCP_ECN_send_synack(struct tcp_sock *tp,
+ struct sk_buff *skb)
+{
+ TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_CWR;
+ if (!(tp->ecn_flags&TCP_ECN_OK))
+ TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_ECE;
+}
+
+static inline void TCP_ECN_send_syn(struct sock *sk, struct sk_buff *skb)
+{
+ struct tcp_sock *tp = tcp_sk(sk);
+
+ tp->ecn_flags = 0;
+ if (sysctl_tcp_ecn) {
+ TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_ECE|TCPCB_FLAG_CWR;
+ tp->ecn_flags = TCP_ECN_OK;
+ }
+}
+
+static __inline__ void
+TCP_ECN_make_synack(struct request_sock *req, struct tcphdr *th)
+{
+ if (inet_rsk(req)->ecn_ok)
+ th->ece = 1;
+}
+
+static inline void TCP_ECN_send(struct sock *sk, struct sk_buff *skb,
+ int tcp_header_len)
+{
+ struct tcp_sock *tp = tcp_sk(sk);
+
+ if (tp->ecn_flags & TCP_ECN_OK) {
+ /* Not-retransmitted data segment: set ECT and inject CWR. */
+ if (skb->len != tcp_header_len &&
+ !before(TCP_SKB_CB(skb)->seq, tp->snd_nxt)) {
+ INET_ECN_xmit(sk);
+ if (tp->ecn_flags&TCP_ECN_QUEUE_CWR) {
+ tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR;
+ tcp_hdr(skb)->cwr = 1;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
+ }
+ } else {
+ /* ACK or retransmitted segment: clear ECT|CE */
+ INET_ECN_dontxmit(sk);
+ }
+ if (tp->ecn_flags & TCP_ECN_DEMAND_CWR)
+ tcp_hdr(skb)->ece = 1;
+ }
+}
+
static void tcp_build_and_update_options(__be32 *ptr, struct tcp_sock *tp,
__u32 tstamp, __u8 **md5_hash)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-20 03:01:10 +0000