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Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h106
1 files changed, 67 insertions, 39 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index a8af9ae00177..92049e681258 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>
@@ -281,7 +282,7 @@ extern int tcp_v4_remember_stamp(struct sock *sk);
extern int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
-extern int tcp_sendmsg(struct kiocb *iocb, struct sock *sk,
+extern int tcp_sendmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size);
extern ssize_t tcp_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags);
@@ -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.
*/
@@ -589,32 +599,19 @@ static inline int tcp_skb_mss(const struct sk_buff *skb)
return skb_shinfo(skb)->gso_size;
}
-static inline void tcp_dec_pcount_approx(__u32 *count,
- const struct sk_buff *skb)
+static inline void tcp_dec_pcount_approx_int(__u32 *count, const int decr)
{
if (*count) {
- *count -= tcp_skb_pcount(skb);
+ *count -= decr;
if ((int)*count < 0)
*count = 0;
}
}
-static inline void tcp_packets_out_inc(struct sock *sk,
- const struct sk_buff *skb)
-{
- struct tcp_sock *tp = tcp_sk(sk);
- int orig = tp->packets_out;
-
- tp->packets_out += tcp_skb_pcount(skb);
- if (!orig)
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
- inet_csk(sk)->icsk_rto, TCP_RTO_MAX);
-}
-
-static inline void tcp_packets_out_dec(struct tcp_sock *tp,
- const struct sk_buff *skb)
+static inline void tcp_dec_pcount_approx(__u32 *count,
+ const struct sk_buff *skb)
{
- tp->packets_out -= tcp_skb_pcount(skb);
+ tcp_dec_pcount_approx_int(count, tcp_skb_pcount(skb));
}
/* Events passed to congestion control interface */
@@ -652,8 +649,7 @@ struct tcp_congestion_ops {
/* lower bound for congestion window (optional) */
u32 (*min_cwnd)(const struct sock *sk);
/* do new cwnd calculation (required) */
- void (*cong_avoid)(struct sock *sk, u32 ack,
- u32 rtt, u32 in_flight, int good_ack);
+ void (*cong_avoid)(struct sock *sk, u32 ack, u32 in_flight, int good_ack);
/* call before changing ca_state (optional) */
void (*set_state)(struct sock *sk, u8 new_state);
/* call when cwnd event occurs (optional) */
@@ -661,7 +657,7 @@ struct tcp_congestion_ops {
/* new value of cwnd after loss (optional) */
u32 (*undo_cwnd)(struct sock *sk);
/* hook for packet ack accounting (optional) */
- void (*pkts_acked)(struct sock *sk, u32 num_acked, ktime_t last);
+ void (*pkts_acked)(struct sock *sk, u32 num_acked, s32 rtt_us);
/* get info for inet_diag (optional) */
void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb);
@@ -684,8 +680,7 @@ extern void tcp_slow_start(struct tcp_sock *tp);
extern struct tcp_congestion_ops tcp_init_congestion_ops;
extern u32 tcp_reno_ssthresh(struct sock *sk);
-extern void tcp_reno_cong_avoid(struct sock *sk, u32 ack,
- u32 rtt, u32 in_flight, int flag);
+extern void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag);
extern u32 tcp_reno_min_cwnd(const struct sock *sk);
extern struct tcp_congestion_ops tcp_reno;
@@ -706,6 +701,39 @@ static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
icsk->icsk_ca_ops->cwnd_event(sk, event);
}
+/* These functions determine how the current flow behaves in respect of SACK
+ * handling. SACK is negotiated with the peer, and therefore it can vary
+ * between different flows.
+ *
+ * tcp_is_sack - SACK enabled
+ * tcp_is_reno - No SACK
+ * tcp_is_fack - FACK enabled, implies SACK enabled
+ */
+static inline int tcp_is_sack(const struct tcp_sock *tp)
+{
+ return tp->rx_opt.sack_ok;
+}
+
+static inline int tcp_is_reno(const struct tcp_sock *tp)
+{
+ return !tcp_is_sack(tp);
+}
+
+static inline int tcp_is_fack(const struct tcp_sock *tp)
+{
+ return tp->rx_opt.sack_ok & 2;
+}
+
+static inline void tcp_enable_fack(struct tcp_sock *tp)
+{
+ tp->rx_opt.sack_ok |= 2;
+}
+
+static inline unsigned int tcp_left_out(const struct tcp_sock *tp)
+{
+ return tp->sacked_out + tp->lost_out;
+}
+
/* This determines how many packets are "in the network" to the best
* of our knowledge. In many cases it is conservative, but where
* detailed information is available from the receiver (via SACK
@@ -722,7 +750,7 @@ static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
*/
static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
{
- return (tp->packets_out - tp->left_out + tp->retrans_out);
+ return tp->packets_out - tcp_left_out(tp) + tp->retrans_out;
}
/* If cwnd > ssthresh, we may raise ssthresh to be half-way to cwnd.
@@ -740,12 +768,8 @@ static inline __u32 tcp_current_ssthresh(const struct sock *sk)
(tp->snd_cwnd >> 2)));
}
-static inline void tcp_sync_left_out(struct tcp_sock *tp)
-{
- BUG_ON(tp->rx_opt.sack_ok &&
- (tp->sacked_out + tp->lost_out > tp->packets_out));
- tp->left_out = tp->sacked_out + tp->lost_out;
-}
+/* Use define here intentionally to get WARN_ON location shown at the caller */
+#define tcp_verify_left_out(tp) WARN_ON(tcp_left_out(tp) > tp->packets_out)
extern void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);
extern __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst);
@@ -1042,12 +1066,18 @@ static inline void tcp_mib_init(void)
TCP_ADD_STATS_USER(TCP_MIB_MAXCONN, -1);
}
-/*from STCP */
-static inline void clear_all_retrans_hints(struct tcp_sock *tp){
+/* from STCP */
+static inline void tcp_clear_retrans_hints_partial(struct tcp_sock *tp)
+{
tp->lost_skb_hint = NULL;
tp->scoreboard_skb_hint = NULL;
tp->retransmit_skb_hint = NULL;
tp->forward_skb_hint = NULL;
+}
+
+static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp)
+{
+ tcp_clear_retrans_hints_partial(tp);
tp->fastpath_skb_hint = NULL;
}
@@ -1061,14 +1091,12 @@ struct tcp_md5sig_key {
};
struct tcp4_md5sig_key {
- u8 *key;
- u16 keylen;
+ struct tcp_md5sig_key base;
__be32 addr;
};
struct tcp6_md5sig_key {
- u8 *key;
- u16 keylen;
+ struct tcp_md5sig_key base;
#if 0
u32 scope_id; /* XXX */
#endif
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-23 07:55:39 +0300