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-rw-r--r--include/net/tcp.h25
-rw-r--r--include/net/tcp_ecn.h11
-rw-r--r--net/ipv4/tcp.c39
-rw-r--r--net/ipv4/tcp_input.c145
-rw-r--r--net/ipv4/tcp_output.c54
5 files changed, 158 insertions, 116 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index e798033..43910fe 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -420,9 +420,9 @@ extern __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb,
/* tcp_output.c */
-extern void __tcp_push_pending_frames(struct sock *sk, struct tcp_sock *tp,
- unsigned int cur_mss, int nonagle);
-extern int tcp_may_send_now(struct sock *sk, struct tcp_sock *tp);
+extern void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
+ int nonagle);
+extern int tcp_may_send_now(struct sock *sk);
extern int tcp_retransmit_skb(struct sock *, struct sk_buff *);
extern void tcp_xmit_retransmit_queue(struct sock *);
extern void tcp_simple_retransmit(struct sock *);
@@ -479,8 +479,10 @@ static inline void tcp_fast_path_on(struct tcp_sock *tp)
__tcp_fast_path_on(tp, tp->snd_wnd >> tp->rx_opt.snd_wscale);
}
-static inline void tcp_fast_path_check(struct sock *sk, struct tcp_sock *tp)
+static inline void tcp_fast_path_check(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (skb_queue_empty(&tp->out_of_order_queue) &&
tp->rcv_wnd &&
atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf &&
@@ -591,10 +593,10 @@ static inline void tcp_dec_pcount_approx(__u32 *count,
}
}
-static inline void tcp_packets_out_inc(struct sock *sk,
- struct tcp_sock *tp,
+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);
@@ -778,18 +780,21 @@ static inline void tcp_minshall_update(struct tcp_sock *tp, int mss,
tp->snd_sml = TCP_SKB_CB(skb)->end_seq;
}
-static inline void tcp_check_probe_timer(struct sock *sk, struct tcp_sock *tp)
+static inline void tcp_check_probe_timer(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
const struct inet_connection_sock *icsk = inet_csk(sk);
+
if (!tp->packets_out && !icsk->icsk_pending)
inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
icsk->icsk_rto, TCP_RTO_MAX);
}
-static inline void tcp_push_pending_frames(struct sock *sk,
- struct tcp_sock *tp)
+static inline void tcp_push_pending_frames(struct sock *sk)
{
- __tcp_push_pending_frames(sk, tp, tcp_current_mss(sk, 1), tp->nonagle);
+ struct tcp_sock *tp = tcp_sk(sk);
+
+ __tcp_push_pending_frames(sk, tcp_current_mss(sk, 1), tp->nonagle);
}
static inline void tcp_init_wl(struct tcp_sock *tp, u32 ack, u32 seq)
diff --git a/include/net/tcp_ecn.h b/include/net/tcp_ecn.h
index b5f7c6a..89eb3e0 100644
--- a/include/net/tcp_ecn.h
+++ b/include/net/tcp_ecn.h
@@ -27,9 +27,10 @@ static inline void TCP_ECN_send_synack(struct tcp_sock *tp,
TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_ECE;
}
-static inline void TCP_ECN_send_syn(struct sock *sk, struct tcp_sock *tp,
- struct sk_buff *skb)
+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;
@@ -44,9 +45,11 @@ TCP_ECN_make_synack(struct request_sock *req, struct tcphdr *th)
th->ece = 1;
}
-static inline void TCP_ECN_send(struct sock *sk, struct tcp_sock *tp,
- struct sk_buff *skb, int tcp_header_len)
+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 &&
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 99ad52c..2cf9a89 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -460,9 +460,9 @@ static inline int forced_push(struct tcp_sock *tp)
return after(tp->write_seq, tp->pushed_seq + (tp->max_window >> 1));
}
-static inline void skb_entail(struct sock *sk, struct tcp_sock *tp,
- struct sk_buff *skb)
+static inline void skb_entail(struct sock *sk, struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct tcp_skb_cb *tcb = TCP_SKB_CB(skb);
skb->csum = 0;
@@ -486,15 +486,17 @@ static inline void tcp_mark_urg(struct tcp_sock *tp, int flags,
}
}
-static inline void tcp_push(struct sock *sk, struct tcp_sock *tp, int flags,
- int mss_now, int nonagle)
+static inline void tcp_push(struct sock *sk, int flags, int mss_now,
+ int nonagle)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (tcp_send_head(sk)) {
struct sk_buff *skb = tcp_write_queue_tail(sk);
if (!(flags & MSG_MORE) || forced_push(tp))
tcp_mark_push(tp, skb);
tcp_mark_urg(tp, flags, skb);
- __tcp_push_pending_frames(sk, tp, mss_now,
+ __tcp_push_pending_frames(sk, mss_now,
(flags & MSG_MORE) ? TCP_NAGLE_CORK : nonagle);
}
}
@@ -540,7 +542,7 @@ new_segment:
if (!skb)
goto wait_for_memory;
- skb_entail(sk, tp, skb);
+ skb_entail(sk, skb);
copy = size_goal;
}
@@ -586,7 +588,7 @@ new_segment:
if (forced_push(tp)) {
tcp_mark_push(tp, skb);
- __tcp_push_pending_frames(sk, tp, mss_now, TCP_NAGLE_PUSH);
+ __tcp_push_pending_frames(sk, mss_now, TCP_NAGLE_PUSH);
} else if (skb == tcp_send_head(sk))
tcp_push_one(sk, mss_now);
continue;
@@ -595,7 +597,7 @@ wait_for_sndbuf:
set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
wait_for_memory:
if (copied)
- tcp_push(sk, tp, flags & ~MSG_MORE, mss_now, TCP_NAGLE_PUSH);
+ tcp_push(sk, flags & ~MSG_MORE, mss_now, TCP_NAGLE_PUSH);
if ((err = sk_stream_wait_memory(sk, &timeo)) != 0)
goto do_error;
@@ -606,7 +608,7 @@ wait_for_memory:
out:
if (copied)
- tcp_push(sk, tp, flags, mss_now, tp->nonagle);
+ tcp_push(sk, flags, mss_now, tp->nonagle);
return copied;
do_error:
@@ -637,8 +639,9 @@ ssize_t tcp_sendpage(struct socket *sock, struct page *page, int offset,
#define TCP_PAGE(sk) (sk->sk_sndmsg_page)
#define TCP_OFF(sk) (sk->sk_sndmsg_off)
-static inline int select_size(struct sock *sk, struct tcp_sock *tp)
+static inline int select_size(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
int tmp = tp->mss_cache;
if (sk->sk_route_caps & NETIF_F_SG) {
@@ -714,7 +717,7 @@ new_segment:
if (!sk_stream_memory_free(sk))
goto wait_for_sndbuf;
- skb = sk_stream_alloc_pskb(sk, select_size(sk, tp),
+ skb = sk_stream_alloc_pskb(sk, select_size(sk),
0, sk->sk_allocation);
if (!skb)
goto wait_for_memory;
@@ -725,7 +728,7 @@ new_segment:
if (sk->sk_route_caps & NETIF_F_ALL_CSUM)
skb->ip_summed = CHECKSUM_PARTIAL;
- skb_entail(sk, tp, skb);
+ skb_entail(sk, skb);
copy = size_goal;
}
@@ -830,7 +833,7 @@ new_segment:
if (forced_push(tp)) {
tcp_mark_push(tp, skb);
- __tcp_push_pending_frames(sk, tp, mss_now, TCP_NAGLE_PUSH);
+ __tcp_push_pending_frames(sk, mss_now, TCP_NAGLE_PUSH);
} else if (skb == tcp_send_head(sk))
tcp_push_one(sk, mss_now);
continue;
@@ -839,7 +842,7 @@ wait_for_sndbuf:
set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
wait_for_memory:
if (copied)
- tcp_push(sk, tp, flags & ~MSG_MORE, mss_now, TCP_NAGLE_PUSH);
+ tcp_push(sk, flags & ~MSG_MORE, mss_now, TCP_NAGLE_PUSH);
if ((err = sk_stream_wait_memory(sk, &timeo)) != 0)
goto do_error;
@@ -851,7 +854,7 @@ wait_for_memory:
out:
if (copied)
- tcp_push(sk, tp, flags, mss_now, tp->nonagle);
+ tcp_push(sk, flags, mss_now, tp->nonagle);
TCP_CHECK_TIMER(sk);
release_sock(sk);
return copied;
@@ -1389,7 +1392,7 @@ do_prequeue:
skip_copy:
if (tp->urg_data && after(tp->copied_seq, tp->urg_seq)) {
tp->urg_data = 0;
- tcp_fast_path_check(sk, tp);
+ tcp_fast_path_check(sk);
}
if (used + offset < skb->len)
continue;
@@ -1830,7 +1833,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
* for currently queued segments.
*/
tp->nonagle |= TCP_NAGLE_OFF|TCP_NAGLE_PUSH;
- tcp_push_pending_frames(sk, tp);
+ tcp_push_pending_frames(sk);
} else {
tp->nonagle &= ~TCP_NAGLE_OFF;
}
@@ -1854,7 +1857,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
tp->nonagle &= ~TCP_NAGLE_CORK;
if (tp->nonagle&TCP_NAGLE_OFF)
tp->nonagle |= TCP_NAGLE_PUSH;
- tcp_push_pending_frames(sk, tp);
+ tcp_push_pending_frames(sk);
}
break;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 2fbfc2e..6333893 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -235,9 +235,9 @@ static void tcp_fixup_sndbuf(struct sock *sk)
*/
/* Slow part of check#2. */
-static int __tcp_grow_window(const struct sock *sk, struct tcp_sock *tp,
- const struct sk_buff *skb)
+static int __tcp_grow_window(const struct sock *sk, const struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
/* Optimize this! */
int truesize = tcp_win_from_space(skb->truesize)/2;
int window = tcp_win_from_space(sysctl_tcp_rmem[2])/2;
@@ -252,9 +252,11 @@ static int __tcp_grow_window(const struct sock *sk, struct tcp_sock *tp,
return 0;
}
-static void tcp_grow_window(struct sock *sk, struct tcp_sock *tp,
+static void tcp_grow_window(struct sock *sk,
struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
/* Check #1 */
if (tp->rcv_ssthresh < tp->window_clamp &&
(int)tp->rcv_ssthresh < tcp_space(sk) &&
@@ -267,7 +269,7 @@ static void tcp_grow_window(struct sock *sk, struct tcp_sock *tp,
if (tcp_win_from_space(skb->truesize) <= skb->len)
incr = 2*tp->advmss;
else
- incr = __tcp_grow_window(sk, tp, skb);
+ incr = __tcp_grow_window(sk, skb);
if (incr) {
tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr, tp->window_clamp);
@@ -330,8 +332,9 @@ static void tcp_init_buffer_space(struct sock *sk)
}
/* 5. Recalculate window clamp after socket hit its memory bounds. */
-static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp)
+static void tcp_clamp_window(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
icsk->icsk_ack.quick = 0;
@@ -503,8 +506,9 @@ new_measure:
* each ACK we send, he increments snd_cwnd and transmits more of his
* queue. -DaveM
*/
-static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb)
+static void tcp_event_data_recv(struct sock *sk, struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
u32 now;
@@ -545,7 +549,7 @@ static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_
TCP_ECN_check_ce(tp, skb);
if (skb->len >= 128)
- tcp_grow_window(sk, tp, skb);
+ tcp_grow_window(sk, skb);
}
/* Called to compute a smoothed rtt estimate. The data fed to this
@@ -1541,8 +1545,10 @@ static inline int tcp_skb_timedout(struct sock *sk, struct sk_buff *skb)
return (tcp_time_stamp - TCP_SKB_CB(skb)->when > inet_csk(sk)->icsk_rto);
}
-static inline int tcp_head_timedout(struct sock *sk, struct tcp_sock *tp)
+static inline int tcp_head_timedout(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
return tp->packets_out &&
tcp_skb_timedout(sk, tcp_write_queue_head(sk));
}
@@ -1640,8 +1646,9 @@ static inline int tcp_head_timedout(struct sock *sk, struct tcp_sock *tp)
* Main question: may we further continue forward transmission
* with the same cwnd?
*/
-static int tcp_time_to_recover(struct sock *sk, struct tcp_sock *tp)
+static int tcp_time_to_recover(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
__u32 packets_out;
/* Do not perform any recovery during FRTO algorithm */
@@ -1659,7 +1666,7 @@ static int tcp_time_to_recover(struct sock *sk, struct tcp_sock *tp)
/* Trick#3 : when we use RFC2988 timer restart, fast
* retransmit can be triggered by timeout of queue head.
*/
- if (tcp_head_timedout(sk, tp))
+ if (tcp_head_timedout(sk))
return 1;
/* Trick#4: It is still not OK... But will it be useful to delay
@@ -1668,7 +1675,7 @@ static int tcp_time_to_recover(struct sock *sk, struct tcp_sock *tp)
packets_out = tp->packets_out;
if (packets_out <= tp->reordering &&
tp->sacked_out >= max_t(__u32, packets_out/2, sysctl_tcp_reordering) &&
- !tcp_may_send_now(sk, tp)) {
+ !tcp_may_send_now(sk)) {
/* We have nothing to send. This connection is limited
* either by receiver window or by application.
*/
@@ -1708,8 +1715,10 @@ static void tcp_add_reno_sack(struct sock *sk)
/* Account for ACK, ACKing some data in Reno Recovery phase. */
-static void tcp_remove_reno_sacks(struct sock *sk, struct tcp_sock *tp, int acked)
+static void tcp_remove_reno_sacks(struct sock *sk, int acked)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (acked > 0) {
/* One ACK acked hole. The rest eat duplicate ACKs. */
if (acked-1 >= tp->sacked_out)
@@ -1728,9 +1737,10 @@ static inline void tcp_reset_reno_sack(struct tcp_sock *tp)
}
/* Mark head of queue up as lost. */
-static void tcp_mark_head_lost(struct sock *sk, struct tcp_sock *tp,
+static void tcp_mark_head_lost(struct sock *sk,
int packets, u32 high_seq)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
int cnt;
@@ -1771,15 +1781,17 @@ static void tcp_mark_head_lost(struct sock *sk, struct tcp_sock *tp,
/* Account newly detected lost packet(s) */
-static void tcp_update_scoreboard(struct sock *sk, struct tcp_sock *tp)
+static void tcp_update_scoreboard(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (IsFack(tp)) {
int lost = tp->fackets_out - tp->reordering;
if (lost <= 0)
lost = 1;
- tcp_mark_head_lost(sk, tp, lost, tp->high_seq);
+ tcp_mark_head_lost(sk, lost, tp->high_seq);
} else {
- tcp_mark_head_lost(sk, tp, 1, tp->high_seq);
+ tcp_mark_head_lost(sk, 1, tp->high_seq);
}
/* New heuristics: it is possible only after we switched
@@ -1787,7 +1799,7 @@ static void tcp_update_scoreboard(struct sock *sk, struct tcp_sock *tp)
* Hence, we can detect timed out packets during fast
* retransmit without falling to slow start.
*/
- if (!IsReno(tp) && tcp_head_timedout(sk, tp)) {
+ if (!IsReno(tp) && tcp_head_timedout(sk)) {
struct sk_buff *skb;
skb = tp->scoreboard_skb_hint ? tp->scoreboard_skb_hint
@@ -1867,9 +1879,11 @@ static inline int tcp_packet_delayed(struct tcp_sock *tp)
/* Undo procedures. */
#if FASTRETRANS_DEBUG > 1
-static void DBGUNDO(struct sock *sk, struct tcp_sock *tp, const char *msg)
+static void DBGUNDO(struct sock *sk, const char *msg)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct inet_sock *inet = inet_sk(sk);
+
printk(KERN_DEBUG "Undo %s %u.%u.%u.%u/%u c%u l%u ss%u/%u p%u\n",
msg,
NIPQUAD(inet->daddr), ntohs(inet->dport),
@@ -1915,13 +1929,15 @@ static inline int tcp_may_undo(struct tcp_sock *tp)
}
/* People celebrate: "We love our President!" */
-static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp)
+static int tcp_try_undo_recovery(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (tcp_may_undo(tp)) {
/* Happy end! We did not retransmit anything
* or our original transmission succeeded.
*/
- DBGUNDO(sk, tp, inet_csk(sk)->icsk_ca_state == TCP_CA_Loss ? "loss" : "retrans");
+ DBGUNDO(sk, inet_csk(sk)->icsk_ca_state == TCP_CA_Loss ? "loss" : "retrans");
tcp_undo_cwr(sk, 1);
if (inet_csk(sk)->icsk_ca_state == TCP_CA_Loss)
NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO);
@@ -1941,10 +1957,12 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp)
}
/* Try to undo cwnd reduction, because D-SACKs acked all retransmitted data */
-static void tcp_try_undo_dsack(struct sock *sk, struct tcp_sock *tp)
+static void tcp_try_undo_dsack(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (tp->undo_marker && !tp->undo_retrans) {
- DBGUNDO(sk, tp, "D-SACK");
+ DBGUNDO(sk, "D-SACK");
tcp_undo_cwr(sk, 1);
tp->undo_marker = 0;
NET_INC_STATS_BH(LINUX_MIB_TCPDSACKUNDO);
@@ -1953,9 +1971,9 @@ static void tcp_try_undo_dsack(struct sock *sk, struct tcp_sock *tp)
/* Undo during fast recovery after partial ACK. */
-static int tcp_try_undo_partial(struct sock *sk, struct tcp_sock *tp,
- int acked)
+static int tcp_try_undo_partial(struct sock *sk, int acked)
{
+ struct tcp_sock *tp = tcp_sk(sk);
/* Partial ACK arrived. Force Hoe's retransmit. */
int failed = IsReno(tp) || tp->fackets_out>tp->reordering;
@@ -1968,7 +1986,7 @@ static int tcp_try_undo_partial(struct sock *sk, struct tcp_sock *tp,
tcp_update_reordering(sk, tcp_fackets_out(tp) + acked, 1);
- DBGUNDO(sk, tp, "Hoe");
+ DBGUNDO(sk, "Hoe");
tcp_undo_cwr(sk, 0);
NET_INC_STATS_BH(LINUX_MIB_TCPPARTIALUNDO);
@@ -1982,8 +2000,10 @@ static int tcp_try_undo_partial(struct sock *sk, struct tcp_sock *tp,
}
/* Undo during loss recovery after partial ACK. */
-static int tcp_try_undo_loss(struct sock *sk, struct tcp_sock *tp)
+static int tcp_try_undo_loss(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (tcp_may_undo(tp)) {
struct sk_buff *skb;
tcp_for_write_queue(skb, sk) {
@@ -1994,7 +2014,7 @@ static int tcp_try_undo_loss(struct sock *sk, struct tcp_sock *tp)
clear_all_retrans_hints(tp);
- DBGUNDO(sk, tp, "partial loss");
+ DBGUNDO(sk, "partial loss");
tp->lost_out = 0;
tp->left_out = tp->sacked_out;
tcp_undo_cwr(sk, 1);
@@ -2016,8 +2036,10 @@ static inline void tcp_complete_cwr(struct sock *sk)
tcp_ca_event(sk, CA_EVENT_COMPLETE_CWR);
}
-static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag)
+static void tcp_try_to_open(struct sock *sk, int flag)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
tp->left_out = tp->sacked_out;
if (tp->retrans_out == 0)
@@ -2111,7 +2133,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
before(tp->snd_una, tp->high_seq) &&
icsk->icsk_ca_state != TCP_CA_Open &&
tp->fackets_out > tp->reordering) {
- tcp_mark_head_lost(sk, tp, tp->fackets_out-tp->reordering, tp->high_seq);
+ tcp_mark_head_lost(sk, tp->fackets_out-tp->reordering, tp->high_seq);
NET_INC_STATS_BH(LINUX_MIB_TCPLOSS);
}
@@ -2127,7 +2149,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
switch (icsk->icsk_ca_state) {
case TCP_CA_Loss:
icsk->icsk_retransmits = 0;
- if (tcp_try_undo_recovery(sk, tp))
+ if (tcp_try_undo_recovery(sk))
return;
break;
@@ -2141,7 +2163,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
break;
case TCP_CA_Disorder:
- tcp_try_undo_dsack(sk, tp);
+ tcp_try_undo_dsack(sk);
if (!tp->undo_marker ||
/* For SACK case do not Open to allow to undo
* catching for all duplicate ACKs. */
@@ -2154,7 +2176,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
case TCP_CA_Recovery:
if (IsReno(tp))
tcp_reset_reno_sack(tp);
- if (tcp_try_undo_recovery(sk, tp))
+ if (tcp_try_undo_recovery(sk))
return;
tcp_complete_cwr(sk);
break;
@@ -2170,14 +2192,14 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
} else {
int acked = prior_packets - tp->packets_out;
if (IsReno(tp))
- tcp_remove_reno_sacks(sk, tp, acked);
- is_dupack = tcp_try_undo_partial(sk, tp, acked);
+ tcp_remove_reno_sacks(sk, acked);
+ is_dupack = tcp_try_undo_partial(sk, acked);
}
break;
case TCP_CA_Loss:
if (flag&FLAG_DATA_ACKED)
icsk->icsk_retransmits = 0;
- if (!tcp_try_undo_loss(sk, tp)) {
+ if (!tcp_try_undo_loss(sk)) {
tcp_moderate_cwnd(tp);
tcp_xmit_retransmit_queue(sk);
return;
@@ -2194,10 +2216,10 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
}
if (icsk->icsk_ca_state == TCP_CA_Disorder)
- tcp_try_undo_dsack(sk, tp);
+ tcp_try_undo_dsack(sk);
- if (!tcp_time_to_recover(sk, tp)) {
- tcp_try_to_open(sk, tp, flag);
+ if (!tcp_time_to_recover(sk)) {
+ tcp_try_to_open(sk, flag);
return;
}
@@ -2236,8 +2258,8 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
tcp_set_ca_state(sk, TCP_CA_Recovery);
}
- if (is_dupack || tcp_head_timedout(sk, tp))
- tcp_update_scoreboard(sk, tp);
+ if (is_dupack || tcp_head_timedout(sk))
+ tcp_update_scoreboard(sk);
tcp_cwnd_down(sk);
tcp_xmit_retransmit_queue(sk);
}
@@ -2313,8 +2335,10 @@ static void tcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
* RFC2988 recommends to restart timer to now+rto.
*/
-static void tcp_ack_packets_out(struct sock *sk, struct tcp_sock *tp)
+static void tcp_ack_packets_out(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (!tp->packets_out) {
inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS);
} else {
@@ -2471,7 +2495,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
if (acked&FLAG_ACKED) {
tcp_ack_update_rtt(sk, acked, seq_rtt);
- tcp_ack_packets_out(sk, tp);
+ tcp_ack_packets_out(sk);
if (rtt_sample && !(acked & FLAG_RETRANS_DATA_ACKED))
(*rtt_sample)(sk, tcp_usrtt(&tv));
@@ -2556,9 +2580,10 @@ static inline int tcp_may_update_window(const struct tcp_sock *tp, const u32 ack
* Window update algorithm, described in RFC793/RFC1122 (used in linux-2.2
* and in FreeBSD. NetBSD's one is even worse.) is wrong.
*/
-static int tcp_ack_update_window(struct sock *sk, struct tcp_sock *tp,
- struct sk_buff *skb, u32 ack, u32 ack_seq)
+static int tcp_ack_update_window(struct sock *sk, struct sk_buff *skb, u32 ack,
+ u32 ack_seq)
{
+ struct tcp_sock *tp = tcp_sk(sk);
int flag = 0;
u32 nwin = ntohs(tcp_hdr(skb)->window);
@@ -2576,7 +2601,7 @@ static int tcp_ack_update_window(struct sock *sk, struct tcp_sock *tp,
* fast path is recovered for sending TCP.
*/
tp->pred_flags = 0;
- tcp_fast_path_check(sk, tp);
+ tcp_fast_path_check(sk);
if (nwin > tp->max_window) {
tp->max_window = nwin;
@@ -2762,7 +2787,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
else
NET_INC_STATS_BH(LINUX_MIB_TCPPUREACKS);
- flag |= tcp_ack_update_window(sk, tp, skb, ack, ack_seq);
+ flag |= tcp_ack_update_window(sk, skb, ack, ack_seq);
if (TCP_SKB_CB(skb)->sacked)
flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una);
@@ -3426,7 +3451,7 @@ queue_and_out:
}
tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
if (skb->len)
- tcp_event_data_recv(sk, tp, skb);
+ tcp_event_data_recv(sk, skb);
if (th->fin)
tcp_fin(skb, sk, th);
@@ -3443,7 +3468,7 @@ queue_and_out:
if (tp->rx_opt.num_sacks)
tcp_sack_remove(tp);
- tcp_fast_path_check(sk, tp);
+ tcp_fast_path_check(sk);
if (eaten > 0)
__kfree_skb(skb);
@@ -3734,7 +3759,7 @@ static int tcp_prune_queue(struct sock *sk)
NET_INC_STATS_BH(LINUX_MIB_PRUNECALLED);
if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
- tcp_clamp_window(sk, tp);
+ tcp_clamp_window(sk);
else if (tcp_memory_pressure)
tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss);
@@ -3803,8 +3828,10 @@ void tcp_cwnd_application_limited(struct sock *sk)
tp->snd_cwnd_stamp = tcp_time_stamp;
}
-static int tcp_should_expand_sndbuf(struct sock *sk, struct tcp_sock *tp)
+static int tcp_should_expand_sndbuf(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
/* If the user specified a specific send buffer setting, do
* not modify it.
*/
@@ -3836,7 +3863,7 @@ static void tcp_new_space(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
- if (tcp_should_expand_sndbuf(sk, tp)) {
+ if (tcp_should_expand_sndbuf(sk)) {
int sndmem = max_t(u32, tp->rx_opt.mss_clamp, tp->mss_cache) +
MAX_TCP_HEADER + 16 + sizeof(struct sk_buff),
demanded = max_t(unsigned int, tp->snd_cwnd,
@@ -3860,9 +3887,9 @@ static void tcp_check_space(struct sock *sk)
}
}
-static inline void tcp_data_snd_check(struct sock *sk, struct tcp_sock *tp)
+static inline void tcp_data_snd_check(struct sock *sk)
{
- tcp_push_pending_frames(sk, tp);
+ tcp_push_pending_frames(sk);
tcp_check_space(sk);
}
@@ -4196,7 +4223,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
*/
tcp_ack(sk, skb, 0);
__kfree_skb(skb);
- tcp_data_snd_check(sk, tp);
+ tcp_data_snd_check(sk);
return 0;
} else { /* Header too small */
TCP_INC_STATS_BH(TCP_MIB_INERRS);
@@ -4267,12 +4294,12 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
}
- tcp_event_data_recv(sk, tp, skb);
+ tcp_event_data_recv(sk, skb);
if (TCP_SKB_CB(skb)->ack_seq != tp->snd_una) {
/* Well, only one small jumplet in fast path... */
tcp_ack(sk, skb, FLAG_DATA);
- tcp_data_snd_check(sk, tp);
+ tcp_data_snd_check(sk);
if (!inet_csk_ack_scheduled(sk))
goto no_ack;
}
@@ -4355,7 +4382,7 @@ step5:
/* step 7: process the segment text */
tcp_data_queue(sk, skb);
- tcp_data_snd_check(sk, tp);
+ tcp_data_snd_check(sk);
tcp_ack_snd_check(sk);
return 0;
@@ -4672,7 +4699,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
/* Do step6 onward by hand. */
tcp_urg(sk, skb, th);
__kfree_skb(skb);
- tcp_data_snd_check(sk, tp);
+ tcp_data_snd_check(sk);
return 0;
}
@@ -4864,7 +4891,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
/* tcp_data could move socket to TIME-WAIT */
if (sk->sk_state != TCP_CLOSE) {
- tcp_data_snd_check(sk, tp);
+ tcp_data_snd_check(sk);
tcp_ack_snd_check(sk);
}
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 94d9f0c..3a60aea 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -62,12 +62,13 @@ int sysctl_tcp_base_mss __read_mostly = 512;
/* By default, RFC2861 behavior. */
int sysctl_tcp_slow_start_after_idle __read_mostly = 1;
-static void update_send_head(struct sock *sk, struct tcp_sock *tp,
- struct sk_buff *skb)
+static void update_send_head(struct sock *sk, struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
tcp_advance_send_head(sk, skb);
tp->snd_nxt = TCP_SKB_CB(skb)->end_seq;
- tcp_packets_out_inc(sk, tp, skb);
+ tcp_packets_out_inc(sk, skb);
}
/* SND.NXT, if window was not shrunk.
@@ -76,8 +77,10 @@ static void update_send_head(struct sock *sk, struct tcp_sock *tp,
* Anything in between SND.UNA...SND.UNA+SND.WND also can be already
* invalid. OK, let's make this for now:
*/
-static inline __u32 tcp_acceptable_seq(struct sock *sk, struct tcp_sock *tp)
+static inline __u32 tcp_acceptable_seq(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (!before(tp->snd_una+tp->snd_wnd, tp->snd_nxt))
return tp->snd_nxt;
else
@@ -516,7 +519,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
md5 ? &md5_hash_location :
#endif
NULL);
- TCP_ECN_send(sk, tp, skb, tcp_header_size);
+ TCP_ECN_send(sk, skb, tcp_header_size);
}
#ifdef CONFIG_TCP_MD5SIG
@@ -927,8 +930,9 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
/* Congestion window validation. (RFC2861) */
-static void tcp_cwnd_validate(struct sock *sk, struct tcp_sock *tp)
+static void tcp_cwnd_validate(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
__u32 packets_out = tp->packets_out;
if (packets_out >= tp->snd_cwnd) {
@@ -1076,8 +1080,9 @@ static unsigned int tcp_snd_test(struct sock *sk, struct sk_buff *skb,
return cwnd_quota;
}
-int tcp_may_send_now(struct sock *sk, struct tcp_sock *tp)
+int tcp_may_send_now(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb = tcp_send_head(sk);
return (skb &&
@@ -1144,8 +1149,9 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
*
* This algorithm is from John Heffner.
*/
-static int tcp_tso_should_defer(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb)
+static int tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
const struct inet_connection_sock *icsk = inet_csk(sk);
u32 send_win, cong_win, limit, in_flight;
@@ -1324,7 +1330,7 @@ static int tcp_mtu_probe(struct sock *sk)
/* Decrement cwnd here because we are sending
* effectively two packets. */
tp->snd_cwnd--;
- update_send_head(sk, tp, nskb);
+ update_send_head(sk, nskb);
icsk->icsk_mtup.probe_size = tcp_mss_to_mtu(sk, nskb->len);
tp->mtu_probe.probe_seq_start = TCP_SKB_CB(nskb)->seq;
@@ -1387,7 +1393,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
nonagle : TCP_NAGLE_PUSH))))
break;
} else {
- if (tcp_tso_should_defer(sk, tp, skb))
+ if (tcp_tso_should_defer(sk, skb))
break;
}
@@ -1416,14 +1422,14 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
/* Advance the send_head. This one is sent out.
* This call will increment packets_out.
*/
- update_send_head(sk, tp, skb);
+ update_send_head(sk, skb);
tcp_minshall_update(tp, mss_now, skb);
sent_pkts++;
}
if (likely(sent_pkts)) {
- tcp_cwnd_validate(sk, tp);
+ tcp_cwnd_validate(sk);
return 0;
}
return !tp->packets_out && tcp_send_head(sk);
@@ -1433,14 +1439,14 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
* TCP_CORK or attempt at coalescing tiny packets.
* The socket must be locked by the caller.
*/
-void __tcp_push_pending_frames(struct sock *sk, struct tcp_sock *tp,
- unsigned int cur_mss, int nonagle)
+void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
+ int nonagle)
{
struct sk_buff *skb = tcp_send_head(sk);
if (skb) {
if (tcp_write_xmit(sk, cur_mss, nonagle))
- tcp_check_probe_timer(sk, tp);
+ tcp_check_probe_timer(sk);
}
}
@@ -1484,8 +1490,8 @@ void tcp_push_one(struct sock *sk, unsigned int mss_now)
TCP_SKB_CB(skb)->when = tcp_time_stamp;
if (likely(!tcp_transmit_skb(sk, skb, 1, sk->sk_allocation))) {
- update_send_head(sk, tp, skb);
- tcp_cwnd_validate(sk, tp);
+ update_send_head(sk, skb);
+ tcp_cwnd_validate(sk);
return;
}
}
@@ -1933,7 +1939,7 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
* segments to send.
*/
- if (tcp_may_send_now(sk, tp))
+ if (tcp_may_send_now(sk))
return;
if (tp->forward_skb_hint) {
@@ -2023,7 +2029,7 @@ void tcp_send_fin(struct sock *sk)
TCP_SKB_CB(skb)->end_seq = TCP_SKB_CB(skb)->seq + 1;
tcp_queue_skb(sk, skb);
}
- __tcp_push_pending_frames(sk, tp, mss_now, TCP_NAGLE_OFF);
+ __tcp_push_pending_frames(sk, mss_now, TCP_NAGLE_OFF);
}
/* We get here when a process closes a file descriptor (either due to
@@ -2033,7 +2039,6 @@ void tcp_send_fin(struct sock *sk)
*/
void tcp_send_active_reset(struct sock *sk, gfp_t priority)
{
- struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
/* NOTE: No TCP options attached and we never retransmit this. */
@@ -2053,7 +2058,7 @@ void tcp_send_active_reset(struct sock *sk, gfp_t priority)
skb_shinfo(skb)->gso_type = 0;
/* Send it off. */
- TCP_SKB_CB(skb)->seq = tcp_acceptable_seq(sk, tp);
+ TCP_SKB_CB(skb)->seq = tcp_acceptable_seq(sk);
TCP_SKB_CB(skb)->end_seq = TCP_SKB_CB(skb)->seq;
TCP_SKB_CB(skb)->when = tcp_time_stamp;
if (tcp_transmit_skb(sk, skb, 0, priority))
@@ -2271,7 +2276,7 @@ int tcp_connect(struct sock *sk)
skb_reserve(buff, MAX_TCP_HEADER);
TCP_SKB_CB(buff)->flags = TCPCB_FLAG_SYN;
- TCP_ECN_send_syn(sk, tp, buff);
+ TCP_ECN_send_syn(sk, buff);
TCP_SKB_CB(buff)->sacked = 0;
skb_shinfo(buff)->gso_segs = 1;
skb_shinfo(buff)->gso_size = 0;
@@ -2363,7 +2368,6 @@ void tcp_send_ack(struct sock *sk)
{
/* If we have been reset, we may not send again. */
if (sk->sk_state != TCP_CLOSE) {
- struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *buff;
/* We are not putting this on the write queue, so
@@ -2389,7 +2393,7 @@ void tcp_send_ack(struct sock *sk)
skb_shinfo(buff)->gso_type = 0;
/* Send it off, this clears delayed acks for us. */
- TCP_SKB_CB(buff)->seq = TCP_SKB_CB(buff)->end_seq = tcp_acceptable_seq(sk, tp);
+ TCP_SKB_CB(buff)->seq = TCP_SKB_CB(buff)->end_seq = tcp_acceptable_seq(sk);
TCP_SKB_CB(buff)->when = tcp_time_stamp;
tcp_transmit_skb(sk, buff, 0, GFP_ATOMIC);
}
@@ -2467,7 +2471,7 @@ int tcp_write_wakeup(struct sock *sk)
TCP_SKB_CB(skb)->when = tcp_time_stamp;
err = tcp_transmit_skb(sk, skb, 1, GFP_ATOMIC);
if (!err) {
- update_send_head(sk, tp, skb);
+ update_send_head(sk, skb);
}
return err;
} else {
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