diff options
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 513 |
1 files changed, 281 insertions, 232 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 53a8a5399f1e..1afb080bdf0c 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -114,20 +114,21 @@ int sysctl_tcp_moderate_rcvbuf = 1; /* Adapt the MSS value used to make delayed ack decision to the * real world. */ -static inline void tcp_measure_rcv_mss(struct tcp_sock *tp, - struct sk_buff *skb) +static inline void tcp_measure_rcv_mss(struct sock *sk, + const struct sk_buff *skb) { - unsigned int len, lss; + struct inet_connection_sock *icsk = inet_csk(sk); + const unsigned int lss = icsk->icsk_ack.last_seg_size; + unsigned int len; - lss = tp->ack.last_seg_size; - tp->ack.last_seg_size = 0; + icsk->icsk_ack.last_seg_size = 0; /* skb->len may jitter because of SACKs, even if peer * sends good full-sized frames. */ len = skb->len; - if (len >= tp->ack.rcv_mss) { - tp->ack.rcv_mss = len; + if (len >= icsk->icsk_ack.rcv_mss) { + icsk->icsk_ack.rcv_mss = len; } else { /* Otherwise, we make more careful check taking into account, * that SACKs block is variable. @@ -147,41 +148,44 @@ static inline void tcp_measure_rcv_mss(struct tcp_sock *tp, * tcp header plus fixed timestamp option length. * Resulting "len" is MSS free of SACK jitter. */ - len -= tp->tcp_header_len; - tp->ack.last_seg_size = len; + len -= tcp_sk(sk)->tcp_header_len; + icsk->icsk_ack.last_seg_size = len; if (len == lss) { - tp->ack.rcv_mss = len; + icsk->icsk_ack.rcv_mss = len; return; } } - tp->ack.pending |= TCP_ACK_PUSHED; + icsk->icsk_ack.pending |= ICSK_ACK_PUSHED; } } -static void tcp_incr_quickack(struct tcp_sock *tp) +static void tcp_incr_quickack(struct sock *sk) { - unsigned quickacks = tp->rcv_wnd/(2*tp->ack.rcv_mss); + struct inet_connection_sock *icsk = inet_csk(sk); + unsigned quickacks = tcp_sk(sk)->rcv_wnd / (2 * icsk->icsk_ack.rcv_mss); if (quickacks==0) quickacks=2; - if (quickacks > tp->ack.quick) - tp->ack.quick = min(quickacks, TCP_MAX_QUICKACKS); + if (quickacks > icsk->icsk_ack.quick) + icsk->icsk_ack.quick = min(quickacks, TCP_MAX_QUICKACKS); } -void tcp_enter_quickack_mode(struct tcp_sock *tp) +void tcp_enter_quickack_mode(struct sock *sk) { - tcp_incr_quickack(tp); - tp->ack.pingpong = 0; - tp->ack.ato = TCP_ATO_MIN; + struct inet_connection_sock *icsk = inet_csk(sk); + tcp_incr_quickack(sk); + icsk->icsk_ack.pingpong = 0; + icsk->icsk_ack.ato = TCP_ATO_MIN; } /* Send ACKs quickly, if "quick" count is not exhausted * and the session is not interactive. */ -static __inline__ int tcp_in_quickack_mode(struct tcp_sock *tp) +static inline int tcp_in_quickack_mode(const struct sock *sk) { - return (tp->ack.quick && !tp->ack.pingpong); + const struct inet_connection_sock *icsk = inet_csk(sk); + return icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong; } /* Buffer size and advertised window tuning. @@ -224,8 +228,8 @@ static void tcp_fixup_sndbuf(struct sock *sk) */ /* Slow part of check#2. */ -static int __tcp_grow_window(struct sock *sk, struct tcp_sock *tp, - struct sk_buff *skb) +static int __tcp_grow_window(const struct sock *sk, struct tcp_sock *tp, + const struct sk_buff *skb) { /* Optimize this! */ int truesize = tcp_win_from_space(skb->truesize)/2; @@ -233,7 +237,7 @@ static int __tcp_grow_window(struct sock *sk, struct tcp_sock *tp, while (tp->rcv_ssthresh <= window) { if (truesize <= skb->len) - return 2*tp->ack.rcv_mss; + return 2 * inet_csk(sk)->icsk_ack.rcv_mss; truesize >>= 1; window >>= 1; @@ -260,7 +264,7 @@ static inline void tcp_grow_window(struct sock *sk, struct tcp_sock *tp, if (incr) { tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr, tp->window_clamp); - tp->ack.quick |= 1; + inet_csk(sk)->icsk_ack.quick |= 1; } } } @@ -321,11 +325,12 @@ 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) { + struct inet_connection_sock *icsk = inet_csk(sk); struct sk_buff *skb; unsigned int app_win = tp->rcv_nxt - tp->copied_seq; int ofo_win = 0; - tp->ack.quick = 0; + icsk->icsk_ack.quick = 0; skb_queue_walk(&tp->out_of_order_queue, skb) { ofo_win += skb->len; @@ -346,8 +351,8 @@ static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp) app_win += ofo_win; if (atomic_read(&sk->sk_rmem_alloc) >= 2 * sk->sk_rcvbuf) app_win >>= 1; - if (app_win > tp->ack.rcv_mss) - app_win -= tp->ack.rcv_mss; + if (app_win > icsk->icsk_ack.rcv_mss) + app_win -= icsk->icsk_ack.rcv_mss; app_win = max(app_win, 2U*tp->advmss); if (!ofo_win) @@ -415,11 +420,12 @@ new_measure: tp->rcv_rtt_est.time = tcp_time_stamp; } -static inline void tcp_rcv_rtt_measure_ts(struct tcp_sock *tp, struct sk_buff *skb) +static inline void tcp_rcv_rtt_measure_ts(struct sock *sk, const struct sk_buff *skb) { + struct tcp_sock *tp = tcp_sk(sk); if (tp->rx_opt.rcv_tsecr && (TCP_SKB_CB(skb)->end_seq - - TCP_SKB_CB(skb)->seq >= tp->ack.rcv_mss)) + TCP_SKB_CB(skb)->seq >= inet_csk(sk)->icsk_ack.rcv_mss)) tcp_rcv_rtt_update(tp, tcp_time_stamp - tp->rx_opt.rcv_tsecr, 0); } @@ -492,41 +498,42 @@ new_measure: */ static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb) { + struct inet_connection_sock *icsk = inet_csk(sk); u32 now; - tcp_schedule_ack(tp); + inet_csk_schedule_ack(sk); - tcp_measure_rcv_mss(tp, skb); + tcp_measure_rcv_mss(sk, skb); tcp_rcv_rtt_measure(tp); now = tcp_time_stamp; - if (!tp->ack.ato) { + if (!icsk->icsk_ack.ato) { /* The _first_ data packet received, initialize * delayed ACK engine. */ - tcp_incr_quickack(tp); - tp->ack.ato = TCP_ATO_MIN; + tcp_incr_quickack(sk); + icsk->icsk_ack.ato = TCP_ATO_MIN; } else { - int m = now - tp->ack.lrcvtime; + int m = now - icsk->icsk_ack.lrcvtime; if (m <= TCP_ATO_MIN/2) { /* The fastest case is the first. */ - tp->ack.ato = (tp->ack.ato>>1) + TCP_ATO_MIN/2; - } else if (m < tp->ack.ato) { - tp->ack.ato = (tp->ack.ato>>1) + m; - if (tp->ack.ato > tp->rto) - tp->ack.ato = tp->rto; - } else if (m > tp->rto) { + icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + TCP_ATO_MIN / 2; + } else if (m < icsk->icsk_ack.ato) { + icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + m; + if (icsk->icsk_ack.ato > icsk->icsk_rto) + icsk->icsk_ack.ato = icsk->icsk_rto; + } else if (m > icsk->icsk_rto) { /* Too long gap. Apparently sender falled to * restart window, so that we send ACKs quickly. */ - tcp_incr_quickack(tp); + tcp_incr_quickack(sk); sk_stream_mem_reclaim(sk); } } - tp->ack.lrcvtime = now; + icsk->icsk_ack.lrcvtime = now; TCP_ECN_check_ce(tp, skb); @@ -543,8 +550,10 @@ static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_ * To save cycles in the RFC 1323 implementation it was better to break * it up into three procedures. -- erics */ -static void tcp_rtt_estimator(struct tcp_sock *tp, __u32 mrtt, u32 *usrtt) +static void tcp_rtt_estimator(struct sock *sk, const __u32 mrtt, u32 *usrtt) { + struct tcp_sock *tp = tcp_sk(sk); + const struct inet_connection_sock *icsk = inet_csk(sk); long m = mrtt; /* RTT */ /* The following amusing code comes from Jacobson's @@ -604,15 +613,16 @@ static void tcp_rtt_estimator(struct tcp_sock *tp, __u32 mrtt, u32 *usrtt) tp->rtt_seq = tp->snd_nxt; } - if (tp->ca_ops->rtt_sample) - tp->ca_ops->rtt_sample(tp, *usrtt); + if (icsk->icsk_ca_ops->rtt_sample) + icsk->icsk_ca_ops->rtt_sample(sk, *usrtt); } /* Calculate rto without backoff. This is the second half of Van Jacobson's * routine referred to above. */ -static inline void tcp_set_rto(struct tcp_sock *tp) +static inline void tcp_set_rto(struct sock *sk) { + const struct tcp_sock *tp = tcp_sk(sk); /* Old crap is replaced with new one. 8) * * More seriously: @@ -623,7 +633,7 @@ static inline void tcp_set_rto(struct tcp_sock *tp) * is invisible. Actually, Linux-2.4 also generates erratic * ACKs in some curcumstances. */ - tp->rto = (tp->srtt >> 3) + tp->rttvar; + inet_csk(sk)->icsk_rto = (tp->srtt >> 3) + tp->rttvar; /* 2. Fixups made earlier cannot be right. * If we do not estimate RTO correctly without them, @@ -635,10 +645,10 @@ static inline void tcp_set_rto(struct tcp_sock *tp) /* NOTE: clamping at TCP_RTO_MIN is not required, current algo * guarantees that rto is higher. */ -static inline void tcp_bound_rto(struct tcp_sock *tp) +static inline void tcp_bound_rto(struct sock *sk) { - if (tp->rto > TCP_RTO_MAX) - tp->rto = TCP_RTO_MAX; + if (inet_csk(sk)->icsk_rto > TCP_RTO_MAX) + inet_csk(sk)->icsk_rto = TCP_RTO_MAX; } /* Save metrics learned by this TCP session. @@ -656,9 +666,10 @@ void tcp_update_metrics(struct sock *sk) dst_confirm(dst); if (dst && (dst->flags&DST_HOST)) { + const struct inet_connection_sock *icsk = inet_csk(sk); int m; - if (tp->backoff || !tp->srtt) { + if (icsk->icsk_backoff || !tp->srtt) { /* This session failed to estimate rtt. Why? * Probably, no packets returned in time. * Reset our results. @@ -707,7 +718,7 @@ void tcp_update_metrics(struct sock *sk) tp->snd_cwnd > dst_metric(dst, RTAX_CWND)) dst->metrics[RTAX_CWND-1] = tp->snd_cwnd; } else if (tp->snd_cwnd > tp->snd_ssthresh && - tp->ca_state == TCP_CA_Open) { + icsk->icsk_ca_state == TCP_CA_Open) { /* Cong. avoidance phase, cwnd is reliable. */ if (!dst_metric_locked(dst, RTAX_SSTHRESH)) dst->metrics[RTAX_SSTHRESH-1] = @@ -801,9 +812,9 @@ static void tcp_init_metrics(struct sock *sk) tp->mdev = dst_metric(dst, RTAX_RTTVAR); tp->mdev_max = tp->rttvar = max(tp->mdev, TCP_RTO_MIN); } - tcp_set_rto(tp); - tcp_bound_rto(tp); - if (tp->rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp) + tcp_set_rto(sk); + tcp_bound_rto(sk); + if (inet_csk(sk)->icsk_rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp) goto reset; tp->snd_cwnd = tcp_init_cwnd(tp, dst); tp->snd_cwnd_stamp = tcp_time_stamp; @@ -817,12 +828,14 @@ reset: if (!tp->rx_opt.saw_tstamp && tp->srtt) { tp->srtt = 0; tp->mdev = tp->mdev_max = tp->rttvar = TCP_TIMEOUT_INIT; - tp->rto = TCP_TIMEOUT_INIT; + inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT; } } -static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts) +static void tcp_update_reordering(struct sock *sk, const int metric, + const int ts) { + struct tcp_sock *tp = tcp_sk(sk); if (metric > tp->reordering) { tp->reordering = min(TCP_MAX_REORDERING, metric); @@ -837,7 +850,7 @@ static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts) NET_INC_STATS_BH(LINUX_MIB_TCPSACKREORDER); #if FASTRETRANS_DEBUG > 1 printk(KERN_DEBUG "Disorder%d %d %u f%u s%u rr%d\n", - tp->rx_opt.sack_ok, tp->ca_state, + tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state, tp->reordering, tp->fackets_out, tp->sacked_out, @@ -899,6 +912,7 @@ static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts) static int tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_una) { + const struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); unsigned char *ptr = ack_skb->h.raw + TCP_SKB_CB(ack_skb)->sacked; struct tcp_sack_block *sp = (struct tcp_sack_block *)(ptr+2); @@ -1064,7 +1078,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_ * we have to account for reordering! Ugly, * but should help. */ - if (lost_retrans && tp->ca_state == TCP_CA_Recovery) { + if (lost_retrans && icsk->icsk_ca_state == TCP_CA_Recovery) { struct sk_buff *skb; sk_stream_for_retrans_queue(skb, sk) { @@ -1093,8 +1107,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_ tp->left_out = tp->sacked_out + tp->lost_out; - if ((reord < tp->fackets_out) && tp->ca_state != TCP_CA_Loss) - tcp_update_reordering(tp, ((tp->fackets_out + 1) - reord), 0); + if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss) + tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0); #if FASTRETRANS_DEBUG > 0 BUG_TRAP((int)tp->sacked_out >= 0); @@ -1111,17 +1125,18 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_ */ void tcp_enter_frto(struct sock *sk) { + const struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); struct sk_buff *skb; tp->frto_counter = 1; - if (tp->ca_state <= TCP_CA_Disorder || + if (icsk->icsk_ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq || - (tp->ca_state == TCP_CA_Loss && !tp->retransmits)) { - tp->prior_ssthresh = tcp_current_ssthresh(tp); - tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); - tcp_ca_event(tp, CA_EVENT_FRTO); + (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) { + tp->prior_ssthresh = tcp_current_ssthresh(sk); + tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); + tcp_ca_event(sk, CA_EVENT_FRTO); } /* Have to clear retransmission markers here to keep the bookkeeping @@ -1138,7 +1153,7 @@ void tcp_enter_frto(struct sock *sk) } tcp_sync_left_out(tp); - tcp_set_ca_state(tp, TCP_CA_Open); + tcp_set_ca_state(sk, TCP_CA_Open); tp->frto_highmark = tp->snd_nxt; } @@ -1184,7 +1199,7 @@ static void tcp_enter_frto_loss(struct sock *sk) tp->reordering = min_t(unsigned int, tp->reordering, sysctl_tcp_reordering); - tcp_set_ca_state(tp, TCP_CA_Loss); + tcp_set_ca_state(sk, TCP_CA_Loss); tp->high_seq = tp->frto_highmark; TCP_ECN_queue_cwr(tp); } @@ -1208,16 +1223,17 @@ void tcp_clear_retrans(struct tcp_sock *tp) */ void tcp_enter_loss(struct sock *sk, int how) { + const struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); struct sk_buff *skb; int cnt = 0; /* Reduce ssthresh if it has not yet been made inside this window. */ - if (tp->ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq || - (tp->ca_state == TCP_CA_Loss && !tp->retransmits)) { - tp->prior_ssthresh = tcp_current_ssthresh(tp); - tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); - tcp_ca_event(tp, CA_EVENT_LOSS); + if (icsk->icsk_ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq || + (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) { + tp->prior_ssthresh = tcp_current_ssthresh(sk); + tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); + tcp_ca_event(sk, CA_EVENT_LOSS); } tp->snd_cwnd = 1; tp->snd_cwnd_cnt = 0; @@ -1248,12 +1264,12 @@ void tcp_enter_loss(struct sock *sk, int how) tp->reordering = min_t(unsigned int, tp->reordering, sysctl_tcp_reordering); - tcp_set_ca_state(tp, TCP_CA_Loss); + tcp_set_ca_state(sk, TCP_CA_Loss); tp->high_seq = tp->snd_nxt; TCP_ECN_queue_cwr(tp); } -static int tcp_check_sack_reneging(struct sock *sk, struct tcp_sock *tp) +static int tcp_check_sack_reneging(struct sock *sk) { struct sk_buff *skb; @@ -1265,12 +1281,14 @@ static int tcp_check_sack_reneging(struct sock *sk, struct tcp_sock *tp) */ if ((skb = skb_peek(&sk->sk_write_queue)) != NULL && (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)) { + struct inet_connection_sock *icsk = inet_csk(sk); NET_INC_STATS_BH(LINUX_MIB_TCPSACKRENEGING); tcp_enter_loss(sk, 1); - tp->retransmits++; + icsk->icsk_retransmits++; tcp_retransmit_skb(sk, skb_peek(&sk->sk_write_queue)); - tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto); + inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, + icsk->icsk_rto, TCP_RTO_MAX); return 1; } return 0; @@ -1281,15 +1299,15 @@ static inline int tcp_fackets_out(struct tcp_sock *tp) return IsReno(tp) ? tp->sacked_out+1 : tp->fackets_out; } -static inline int tcp_skb_timedout(struct tcp_sock *tp, struct sk_buff *skb) +static inline int tcp_skb_timedout(struct sock *sk, struct sk_buff *skb) { - return (tcp_time_stamp - TCP_SKB_CB(skb)->when > tp->rto); + 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) { return tp->packets_out && - tcp_skb_timedout(tp, skb_peek(&sk->sk_write_queue)); + tcp_skb_timedout(sk, skb_peek(&sk->sk_write_queue)); } /* Linux NewReno/SACK/FACK/ECN state machine. @@ -1423,8 +1441,9 @@ static int tcp_time_to_recover(struct sock *sk, struct tcp_sock *tp) * in assumption of absent reordering, interpret this as reordering. * The only another reason could be bug in receiver TCP. */ -static void tcp_check_reno_reordering(struct tcp_sock *tp, int addend) +static void tcp_check_reno_reordering(struct sock *sk, const int addend) { + struct tcp_sock *tp = tcp_sk(sk); u32 holes; holes = max(tp->lost_out, 1U); @@ -1432,16 +1451,17 @@ static void tcp_check_reno_reordering(struct tcp_sock *tp, int addend) if ((tp->sacked_out + holes) > tp->packets_out) { tp->sacked_out = tp->packets_out - holes; - tcp_update_reordering(tp, tp->packets_out+addend, 0); + tcp_update_reordering(sk, tp->packets_out + addend, 0); } } /* Emulate SACKs for SACKless connection: account for a new dupack. */ -static void tcp_add_reno_sack(struct tcp_sock *tp) +static void tcp_add_reno_sack(struct sock *sk) { + struct tcp_sock *tp = tcp_sk(sk); tp->sacked_out++; - tcp_check_reno_reordering(tp, 0); + tcp_check_reno_reordering(sk, 0); tcp_sync_left_out(tp); } @@ -1456,7 +1476,7 @@ static void tcp_remove_reno_sacks(struct sock *sk, struct tcp_sock *tp, int acke else tp->sacked_out -= acked-1; } - tcp_check_reno_reordering(tp, acked); + tcp_check_reno_reordering(sk, acked); tcp_sync_left_out(tp); } @@ -1509,7 +1529,7 @@ static void tcp_update_scoreboard(struct sock *sk, struct tcp_sock *tp) struct sk_buff *skb; sk_stream_for_retrans_queue(skb, sk) { - if (tcp_skb_timedout(tp, skb) && + if (tcp_skb_timedout(sk, skb) && !(TCP_SKB_CB(skb)->sacked&TCPCB_TAGBITS)) { TCP_SKB_CB(skb)->sacked |= TCPCB_LOST; tp->lost_out += tcp_skb_pcount(skb); @@ -1530,14 +1550,16 @@ static inline void tcp_moderate_cwnd(struct tcp_sock *tp) } /* Decrease cwnd each second ack. */ -static void tcp_cwnd_down(struct tcp_sock *tp) +static void tcp_cwnd_down(struct sock *sk) { + const struct inet_connection_sock *icsk = inet_csk(sk); + struct tcp_sock *tp = tcp_sk(sk); int decr = tp->snd_cwnd_cnt + 1; tp->snd_cwnd_cnt = decr&1; decr >>= 1; - if (decr && tp->snd_cwnd > tp->ca_ops->min_cwnd(tp)) + if (decr && tp->snd_cwnd > icsk->icsk_ca_ops->min_cwnd(sk)) tp->snd_cwnd -= decr; tp->snd_cwnd = min(tp->snd_cwnd, tcp_packets_in_flight(tp)+1); @@ -1571,11 +1593,15 @@ static void DBGUNDO(struct sock *sk, struct tcp_sock *tp, const char *msg) #define DBGUNDO(x...) do { } while (0) #endif -static void tcp_undo_cwr(struct tcp_sock *tp, int undo) +static void tcp_undo_cwr(struct sock *sk, const int undo) { + struct tcp_sock *tp = tcp_sk(sk); + if (tp->prior_ssthresh) { - if (tp->ca_ops->undo_cwnd) - tp->snd_cwnd = tp->ca_ops->undo_cwnd(tp); + const struct inet_connection_sock *icsk = inet_csk(sk); + + if (icsk->icsk_ca_ops->undo_cwnd) + tp->snd_cwnd = icsk->icsk_ca_ops->undo_cwnd(sk); else tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh<<1); @@ -1603,9 +1629,9 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp) /* Happy end! We did not retransmit anything * or our original transmission succeeded. */ - DBGUNDO(sk, tp, tp->ca_state == TCP_CA_Loss ? "loss" : "retrans"); - tcp_undo_cwr(tp, 1); - if (tp->ca_state == TCP_CA_Loss) + DBGUNDO(sk, tp, 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); else NET_INC_STATS_BH(LINUX_MIB_TCPFULLUNDO); @@ -1618,7 +1644,7 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp) tcp_moderate_cwnd(tp); return 1; } - tcp_set_ca_state(tp, TCP_CA_Open); + tcp_set_ca_state(sk, TCP_CA_Open); return 0; } @@ -1627,7 +1653,7 @@ static void tcp_try_undo_dsack(struct sock *sk, struct tcp_sock *tp) { if (tp->undo_marker && !tp->undo_retrans) { DBGUNDO(sk, tp, "D-SACK"); - tcp_undo_cwr(tp, 1); + tcp_undo_cwr(sk, 1); tp->undo_marker = 0; NET_INC_STATS_BH(LINUX_MIB_TCPDSACKUNDO); } @@ -1648,10 +1674,10 @@ static int tcp_try_undo_partial(struct sock *sk, struct tcp_sock *tp, if (tp->retrans_out == 0) tp->retrans_stamp = 0; - tcp_update_reordering(tp, tcp_fackets_out(tp)+acked, 1); + tcp_update_reordering(sk, tcp_fackets_out(tp) + acked, 1); DBGUNDO(sk, tp, "Hoe"); - tcp_undo_cwr(tp, 0); + tcp_undo_cwr(sk, 0); NET_INC_STATS_BH(LINUX_MIB_TCPPARTIALUNDO); /* So... Do not make Hoe's retransmit yet. @@ -1674,22 +1700,23 @@ static int tcp_try_undo_loss(struct sock *sk, struct tcp_sock *tp) DBGUNDO(sk, tp, "partial loss"); tp->lost_out = 0; tp->left_out = tp->sacked_out; - tcp_undo_cwr(tp, 1); + tcp_undo_cwr(sk, 1); NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO); - tp->retransmits = 0; + inet_csk(sk)->icsk_retransmits = 0; tp->undo_marker = 0; if (!IsReno(tp)) - tcp_set_ca_state(tp, TCP_CA_Open); + tcp_set_ca_state(sk, TCP_CA_Open); return 1; } return 0; } -static inline void tcp_complete_cwr(struct tcp_sock *tp) +static inline void tcp_complete_cwr(struct sock *sk) { + struct tcp_sock *tp = tcp_sk(sk); tp->snd_cwnd = min(tp->snd_cwnd, tp->snd_ssthresh); tp->snd_cwnd_stamp = tcp_time_stamp; - tcp_ca_event(tp, CA_EVENT_COMPLETE_CWR); + tcp_ca_event(sk, CA_EVENT_COMPLETE_CWR); } static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag) @@ -1700,21 +1727,21 @@ static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag) tp->retrans_stamp = 0; if (flag&FLAG_ECE) - tcp_enter_cwr(tp); + tcp_enter_cwr(sk); - if (tp->ca_state != TCP_CA_CWR) { + if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) { int state = TCP_CA_Open; if (tp->left_out || tp->retrans_out || tp->undo_marker) state = TCP_CA_Disorder; - if (tp->ca_state != state) { - tcp_set_ca_state(tp, state); + if (inet_csk(sk)->icsk_ca_state != state) { + tcp_set_ca_state(sk, state); tp->high_seq = tp->snd_nxt; } tcp_moderate_cwnd(tp); } else { - tcp_cwnd_down(tp); + tcp_cwnd_down(sk); } } @@ -1733,6 +1760,7 @@ static void tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, int prior_packets, int flag) { + struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); int is_dupack = (tp->snd_una == prior_snd_una && !(flag&FLAG_NOT_DUP)); @@ -1750,13 +1778,13 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, tp->prior_ssthresh = 0; /* B. In all the states check for reneging SACKs. */ - if (tp->sacked_out && tcp_check_sack_reneging(sk, tp)) + if (tp->sacked_out && tcp_check_sack_reneging(sk)) return; /* C. Process data loss notification, provided it is valid. */ if ((flag&FLAG_DATA_LOST) && before(tp->snd_una, tp->high_seq) && - tp->ca_state != TCP_CA_Open && + 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); NET_INC_STATS_BH(LINUX_MIB_TCPLOSS); @@ -1767,14 +1795,14 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, /* E. Check state exit conditions. State can be terminated * when high_seq is ACKed. */ - if (tp->ca_state == TCP_CA_Open) { + if (icsk->icsk_ca_state == TCP_CA_Open) { if (!sysctl_tcp_frto) BUG_TRAP(tp->retrans_out == 0); tp->retrans_stamp = 0; } else if (!before(tp->snd_una, tp->high_seq)) { - switch (tp->ca_state) { + switch (icsk->icsk_ca_state) { case TCP_CA_Loss: - tp->retransmits = 0; + icsk->icsk_retransmits = 0; if (tcp_try_undo_recovery(sk, tp)) return; break; @@ -1783,8 +1811,8 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, /* CWR is to be held something *above* high_seq * is ACKed for CWR bit to reach receiver. */ if (tp->snd_una != tp->high_seq) { - tcp_complete_cwr(tp); - tcp_set_ca_state(tp, TCP_CA_Open); + tcp_complete_cwr(sk); + tcp_set_ca_state(sk, TCP_CA_Open); } break; @@ -1795,7 +1823,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, * catching for all duplicate ACKs. */ IsReno(tp) || tp->snd_una != tp->high_seq) { tp->undo_marker = 0; - tcp_set_ca_state(tp, TCP_CA_Open); + tcp_set_ca_state(sk, TCP_CA_Open); } break; @@ -1804,17 +1832,17 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, tcp_reset_reno_sack(tp); if (tcp_try_undo_recovery(sk, tp)) return; - tcp_complete_cwr(tp); + tcp_complete_cwr(sk); break; } } /* F. Process state. */ - switch (tp->ca_state) { + switch (icsk->icsk_ca_state) { case TCP_CA_Recovery: if (prior_snd_una == tp->snd_una) { if (IsReno(tp) && is_dupack) - tcp_add_reno_sack(tp); + tcp_add_reno_sack(sk); } else { int acked = prior_packets - tp->packets_out; if (IsReno(tp)) @@ -1824,13 +1852,13 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, break; case TCP_CA_Loss: if (flag&FLAG_DATA_ACKED) - tp->retransmits = 0; + icsk->icsk_retransmits = 0; if (!tcp_try_undo_loss(sk, tp)) { tcp_moderate_cwnd(tp); tcp_xmit_retransmit_queue(sk); return; } - if (tp->ca_state != TCP_CA_Open) + if (icsk->icsk_ca_state != TCP_CA_Open) return; /* Loss is undone; fall through to processing in Open state. */ default: @@ -1838,10 +1866,10 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, if (tp->snd_una != prior_snd_una) tcp_reset_reno_sack(tp); if (is_dupack) - tcp_add_reno_sack(tp); + tcp_add_reno_sack(sk); } - if (tp->ca_state == TCP_CA_Disorder) + if (icsk->icsk_ca_state == TCP_CA_Disorder) tcp_try_undo_dsack(sk, tp); if (!tcp_time_to_recover(sk, tp)) { @@ -1861,30 +1889,28 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, tp->undo_marker = tp->snd_una; tp->undo_retrans = tp->retrans_out; - if (tp->ca_state < TCP_CA_CWR) { + if (icsk->icsk_ca_state < TCP_CA_CWR) { if (!(flag&FLAG_ECE)) - tp->prior_ssthresh = tcp_current_ssthresh(tp); - tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); + tp->prior_ssthresh = tcp_current_ssthresh(sk); + tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); TCP_ECN_queue_cwr(tp); } tp->snd_cwnd_cnt = 0; - tcp_set_ca_state(tp, TCP_CA_Recovery); + tcp_set_ca_state(sk, TCP_CA_Recovery); } if (is_dupack || tcp_head_timedout(sk, tp)) tcp_update_scoreboard(sk, tp); - tcp_cwnd_down(tp); + tcp_cwnd_down(sk); tcp_xmit_retransmit_queue(sk); } /* Read draft-ietf-tcplw-high-performance before mucking * with this code. (Superceeds RFC1323) */ -static void tcp_ack_saw_tstamp(struct tcp_sock *tp, u32 *usrtt, int flag) +static void tcp_ack_saw_tstamp(struct sock *sk, u32 *usrtt, int flag) { - __u32 seq_rtt; - /* RTTM Rule: A TSecr value received in a segment is used to * update the averaged RTT measurement only if the segment * acknowledges some new data, i.e., only if it advances the @@ -1900,14 +1926,15 @@ static void tcp_ack_saw_tstamp(struct tcp_sock *tp, u32 *usrtt, int flag) * answer arrives rto becomes 120 seconds! If at least one of segments * in window is lost... Voila. --ANK (010210) */ - seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr; - tcp_rtt_estimator(tp, seq_rtt, usrtt); - tcp_set_rto(tp); - tp->backoff = 0; - tcp_bound_rto(tp); + struct tcp_sock *tp = tcp_sk(sk); + const __u32 seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr; + tcp_rtt_estimator(sk, seq_rtt, usrtt); + tcp_set_rto(sk); + inet_csk(sk)->icsk_backoff = 0; + tcp_bound_rto(sk); } -static void tcp_ack_no_tstamp(struct tcp_sock *tp, u32 seq_rtt, u32 *usrtt, int flag) +static void tcp_ack_no_tstamp(struct sock *sk, u32 seq_rtt, u32 *usrtt, int flag) { /* We don't have a timestamp. Can only use * packets that are not retransmitted to determine @@ -1921,27 +1948,29 @@ static void tcp_ack_no_tstamp(struct tcp_sock *tp, u32 seq_rtt, u32 *usrtt, int if (flag & FLAG_RETRANS_DATA_ACKED) return; - tcp_rtt_estimator(tp, seq_rtt, usrtt); - tcp_set_rto(tp); - tp->backoff = 0; - tcp_bound_rto(tp); + tcp_rtt_estimator(sk, seq_rtt, usrtt); + tcp_set_rto(sk); + inet_csk(sk)->icsk_backoff = 0; + tcp_bound_rto(sk); } -static inline void tcp_ack_update_rtt(struct tcp_sock *tp, - int flag, s32 seq_rtt, u32 *usrtt) +static inline void tcp_ack_update_rtt(struct sock *sk, const int flag, + const s32 seq_rtt, u32 *usrtt) { + const struct tcp_sock *tp = tcp_sk(sk); /* Note that peer MAY send zero echo. In this case it is ignored. (rfc1323) */ if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) - tcp_ack_saw_tstamp(tp, usrtt, flag); + tcp_ack_saw_tstamp(sk, usrtt, flag); else if (seq_rtt >= 0) - tcp_ack_no_tstamp(tp, seq_rtt, usrtt, flag); + tcp_ack_no_tstamp(sk, seq_rtt, usrtt, flag); } -static inline void tcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, +static inline void tcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight, int good) { - tp->ca_ops->cong_avoid(tp, ack, rtt, in_flight, good); - tp->snd_cwnd_stamp = tcp_time_stamp; + const struct inet_connection_sock *icsk = inet_csk(sk); + icsk->icsk_ca_ops->cong_avoid(sk, ack, rtt, in_flight, good); + tcp_sk(sk)->snd_cwnd_stamp = tcp_time_stamp; } /* Restart timer after forward progress on connection. @@ -1951,9 +1980,9 @@ static inline void tcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, static inline void tcp_ack_packets_out(struct sock *sk, struct tcp_sock *tp) { if (!tp->packets_out) { - tcp_clear_xmit_timer(sk, TCP_TIME_RETRANS); + inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS); } else { - tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto); + inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, inet_csk(sk)->icsk_rto, TCP_RTO_MAX); } } @@ -2068,9 +2097,13 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt seq_rtt = -1; } else if (seq_rtt < 0) seq_rtt = now - scb->when; - if (seq_usrtt) - *seq_usrtt = (usnow.tv_sec - skb->stamp.tv_sec) * 1000000 - + (usnow.tv_usec - skb->stamp.tv_usec); + if (seq_usrtt) { + struct timeval tv; + + skb_get_timestamp(skb, &tv); + *seq_usrtt = (usnow.tv_sec - tv.tv_sec) * 1000000 + + (usnow.tv_usec - tv.tv_usec); + } if (sacked & TCPCB_SACKED_ACKED) tp->sacked_out -= tcp_skb_pcount(skb); @@ -2085,16 +2118,17 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt seq_rtt = now - scb->when; tcp_dec_pcount_approx(&tp->fackets_out, skb); tcp_packets_out_dec(tp, skb); - __skb_unlink(skb, skb->list); + __skb_unlink(skb, &sk->sk_write_queue); sk_stream_free_skb(sk, skb); } if (acked&FLAG_ACKED) { - tcp_ack_update_rtt(tp, acked, seq_rtt, seq_usrtt); + const struct inet_connection_sock *icsk = inet_csk(sk); + tcp_ack_update_rtt(sk, acked, seq_rtt, seq_usrtt); tcp_ack_packets_out(sk, tp); - if (tp->ca_ops->pkts_acked) - tp->ca_ops->pkts_acked(tp, pkts_acked); + if (icsk->icsk_ca_ops->pkts_acked) + icsk->icsk_ca_ops->pkts_acked(sk, pkts_acked); } #if FASTRETRANS_DEBUG > 0 @@ -2102,19 +2136,20 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt BUG_TRAP((int)tp->lost_out >= 0); BUG_TRAP((int)tp->retrans_out >= 0); if (!tp->packets_out && tp->rx_opt.sack_ok) { + const struct inet_connection_sock *icsk = inet_csk(sk); if (tp->lost_out) { printk(KERN_DEBUG "Leak l=%u %d\n", - tp->lost_out, tp->ca_state); + tp->lost_out, icsk->icsk_ca_state); tp->lost_out = 0; } if (tp->sacked_out) { printk(KERN_DEBUG "Leak s=%u %d\n", - tp->sacked_out, tp->ca_state); + tp->sacked_out, icsk->icsk_ca_state); tp->sacked_out = 0; } if (tp->retrans_out) { printk(KERN_DEBUG "Leak r=%u %d\n", - tp->retrans_out, tp->ca_state); + tp->retrans_out, icsk->icsk_ca_state); tp->retrans_out = 0; } } @@ -2125,40 +2160,43 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt static void tcp_ack_probe(struct sock *sk) { - struct tcp_sock *tp = tcp_sk(sk); + const struct tcp_sock *tp = tcp_sk(sk); + struct inet_connection_sock *icsk = inet_csk(sk); /* Was it a usable window open? */ if (!after(TCP_SKB_CB(sk->sk_send_head)->end_seq, tp->snd_una + tp->snd_wnd)) { - tp->backoff = 0; - tcp_clear_xmit_timer(sk, TCP_TIME_PROBE0); + icsk->icsk_backoff = 0; + inet_csk_clear_xmit_timer(sk, ICSK_TIME_PROBE0); /* Socket must be waked up by subsequent tcp_data_snd_check(). * This function is not for random using! */ } else { - tcp_reset_xmit_timer(sk, TCP_TIME_PROBE0, - min(tp->rto << tp->backoff, TCP_RTO_MAX)); + inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0, + min(icsk->icsk_rto << icsk->icsk_backoff, TCP_RTO_MAX), + TCP_RTO_MAX); } } -static inline int tcp_ack_is_dubious(struct tcp_sock *tp, int flag) +static inline int tcp_ack_is_dubious(const struct sock *sk, const int flag) { return (!(flag & FLAG_NOT_DUP) || (flag & FLAG_CA_ALERT) || - tp->ca_state != TCP_CA_Open); + inet_csk(sk)->icsk_ca_state != TCP_CA_Open); } -static inline int tcp_may_raise_cwnd(struct tcp_sock *tp, int flag) +static inline int tcp_may_raise_cwnd(const struct sock *sk, const int flag) { + const struct tcp_sock *tp = tcp_sk(sk); return (!(flag & FLAG_ECE) || tp->snd_cwnd < tp->snd_ssthresh) && - !((1<<tp->ca_state)&(TCPF_CA_Recovery|TCPF_CA_CWR)); + !((1 << inet_csk(sk)->icsk_ca_state) & (TCPF_CA_Recovery | TCPF_CA_CWR)); } /* Check that window update is acceptable. * The function assumes that snd_una<=ack<=snd_next. */ -static inline int tcp_may_update_window(struct tcp_sock *tp, u32 ack, - u32 ack_seq, u32 nwin) +static inline int tcp_may_update_window(const struct tcp_sock *tp, const u32 ack, + const u32 ack_seq, const u32 nwin) { return (after(ack, tp->snd_una) || after(ack_seq, tp->snd_wl1) || @@ -2241,6 +2279,7 @@ static void tcp_process_frto(struct sock *sk, u32 prior_snd_una) /* This routine deals with incoming acks, but not outgoing ones. */ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) { + struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); u32 prior_snd_una = tp->snd_una; u32 ack_seq = TCP_SKB_CB(skb)->seq; @@ -2268,7 +2307,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) tp->snd_una = ack; flag |= FLAG_WIN_UPDATE; - tcp_ca_event(tp, CA_EVENT_FAST_ACK); + tcp_ca_event(sk, CA_EVENT_FAST_ACK); NET_INC_STATS_BH(LINUX_MIB_TCPHPACKS); } else { @@ -2285,7 +2324,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) if (TCP_ECN_rcv_ecn_echo(tp, skb->h.th)) flag |= FLAG_ECE; - tcp_ca_event(tp, CA_EVENT_SLOW_ACK); + tcp_ca_event(sk, CA_EVENT_SLOW_ACK); } /* We passed data and got it acked, remove any soft error @@ -2301,19 +2340,19 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) /* See if we can take anything off of the retransmit queue. */ flag |= tcp_clean_rtx_queue(sk, &seq_rtt, - tp->ca_ops->rtt_sample ? &seq_usrtt : NULL); + icsk->icsk_ca_ops->rtt_sample ? &seq_usrtt : NULL); if (tp->frto_counter) tcp_process_frto(sk, prior_snd_una); - if (tcp_ack_is_dubious(tp, flag)) { + if (tcp_ack_is_dubious(sk, flag)) { /* Advanve CWND, if state allows this. */ - if ((flag & FLAG_DATA_ACKED) && tcp_may_raise_cwnd(tp, flag)) - tcp_cong_avoid(tp, ack, seq_rtt, prior_in_flight, 0); + if ((flag & FLAG_DATA_ACKED) && tcp_may_raise_cwnd(sk, flag)) + tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 0); tcp_fastretrans_alert(sk, prior_snd_una, prior_packets, flag); } else { if ((flag & FLAG_DATA_ACKED)) - tcp_cong_avoid(tp, ack, seq_rtt, prior_in_flight, 1); + tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 1); } if ((flag & FLAG_FORWARD_PROGRESS) || !(flag&FLAG_NOT_DUP)) @@ -2322,7 +2361,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) return 1; no_queue: - tp->probes_out = 0; + icsk->icsk_probes_out = 0; /* If this ack opens up a zero window, clear backoff. It was * being used to time the probes, and is probably far higher than @@ -2500,8 +2539,9 @@ static inline void tcp_replace_ts_recent(struct tcp_sock *tp, u32 seq) * up to bandwidth of 18Gigabit/sec. 8) ] */ -static int tcp_disordered_ack(struct tcp_sock *tp, struct sk_buff *skb) +static int tcp_disordered_ack(const struct sock *sk, const struct sk_buff *skb) { + struct tcp_sock *tp = tcp_sk(sk); struct tcphdr *th = skb->h.th; u32 seq = TCP_SKB_CB(skb)->seq; u32 ack = TCP_SKB_CB(skb)->ack_seq; @@ -2516,14 +2556,15 @@ static int tcp_disordered_ack(struct tcp_sock *tp, struct sk_buff *skb) !tcp_may_update_window(tp, ack, seq, ntohs(th->window) << tp->rx_opt.snd_wscale) && /* 4. ... and sits in replay window. */ - (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (tp->rto*1024)/HZ); + (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (inet_csk(sk)->icsk_rto * 1024) / HZ); } -static inline int tcp_paws_discard(struct tcp_sock *tp, struct sk_buff *skb) +static inline int tcp_paws_discard(const struct sock *sk, const struct sk_buff *skb) { + const struct tcp_sock *tp = tcp_sk(sk); return ((s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) > TCP_PAWS_WINDOW && xtime.tv_sec < tp->rx_opt.ts_recent_stamp + TCP_PAWS_24DAYS && - !tcp_disordered_ack(tp, skb)); + !tcp_disordered_ack(sk, skb)); } /* Check segment sequence number for validity. @@ -2586,7 +2627,7 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th) { struct tcp_sock *tp = tcp_sk(sk); - tcp_schedule_ack(tp); + inet_csk_schedule_ack(sk); sk->sk_shutdown |= RCV_SHUTDOWN; sock_set_flag(sk, SOCK_DONE); @@ -2596,7 +2637,7 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th) case TCP_ESTABLISHED: /* Move to CLOSE_WAIT */ tcp_set_state(sk, TCP_CLOSE_WAIT); - tp->ack.pingpong = 1; + inet_csk(sk)->icsk_ack.pingpong = 1; break; case TCP_CLOSE_WAIT: @@ -2694,7 +2735,7 @@ static void tcp_send_dupack(struct sock *sk, struct sk_buff *skb) if (TCP_SKB_CB(skb)->end_seq != TCP_SKB_CB(skb)->seq && before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKLOST); - tcp_enter_quickack_mode(tp); + tcp_enter_quickack_mode(sk); if (tp->rx_opt.sack_ok && sysctl_tcp_dsack) { u32 end_seq = TCP_SKB_CB(skb)->end_seq; @@ -2853,7 +2894,7 @@ static void tcp_ofo_queue(struct sock *sk) if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) { SOCK_DEBUG(sk, "ofo packet was already received \n"); - __skb_unlink(skb, skb->list); + __skb_unlink(skb, &tp->out_of_order_queue); __kfree_skb(skb); continue; } @@ -2861,7 +2902,7 @@ static void tcp_ofo_queue(struct sock *sk) tp->rcv_nxt, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq); - __skb_unlink(skb, skb->list); + __skb_unlink(skb, &tp->out_of_order_queue); __skb_queue_tail(&sk->sk_receive_queue, skb); tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq; if(skb->h.th->fin) @@ -2942,7 +2983,7 @@ queue_and_out: * gap in queue is filled. */ if (skb_queue_empty(&tp->out_of_order_queue)) - tp->ack.pingpong = 0; + inet_csk(sk)->icsk_ack.pingpong = 0; } if (tp->rx_opt.num_sacks) @@ -2963,8 +3004,8 @@ queue_and_out: tcp_dsack_set(tp, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq); out_of_window: - tcp_enter_quickack_mode(tp); - tcp_schedule_ack(tp); + tcp_enter_quickack_mode(sk); + inet_csk_schedule_ack(sk); drop: __kfree_skb(skb); return; @@ -2974,7 +3015,7 @@ drop: if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp))) goto out_of_window; - tcp_enter_quickack_mode(tp); + tcp_enter_quickack_mode(sk); if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { /* Partial packet, seq < rcv_next < end_seq */ @@ -3003,7 +3044,7 @@ drop: /* Disable header prediction. */ tp->pred_flags = 0; - tcp_schedule_ack(tp); + inet_csk_schedule_ack(sk); SOCK_DEBUG(sk, "out of order segment: rcv_next %X seq %X - %X\n", tp->rcv_nxt, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq); @@ -3027,7 +3068,7 @@ drop: u32 end_seq = TCP_SKB_CB(skb)->end_seq; if (seq == TCP_SKB_CB(skb1)->end_seq) { - __skb_append(skb1, skb); + __skb_append(skb1, skb, &tp->out_of_order_queue); if (!tp->rx_opt.num_sacks || tp->selective_acks[0].end_seq != seq) @@ -3071,7 +3112,7 @@ drop: tcp_dsack_extend(tp, TCP_SKB_CB(skb1)->seq, end_seq); break; } - __skb_unlink(skb1, skb1->list); + __skb_unlink(skb1, &tp->out_of_order_queue); tcp_dsack_extend(tp, TCP_SKB_CB(skb1)->seq, TCP_SKB_CB(skb1)->end_seq); __kfree_skb(skb1); } @@ -3088,8 +3129,9 @@ add_sack: * simplifies code) */ static void -tcp_collapse(struct sock *sk, struct sk_buff *head, - struct sk_buff *tail, u32 start, u32 end) +tcp_collapse(struct sock *sk, struct sk_buff_head *list, + struct sk_buff *head, struct sk_buff *tail, + u32 start, u32 end) { struct sk_buff *skb; @@ -3099,7 +3141,7 @@ tcp_collapse(struct sock *sk, struct sk_buff *head, /* No new bits? It is possible on ofo queue. */ if (!before(start, TCP_SKB_CB(skb)->end_seq)) { struct sk_buff *next = skb->next; - __skb_unlink(skb, skb->list); + __skb_unlink(skb, list); __kfree_skb(skb); NET_INC_STATS_BH(LINUX_MIB_TCPRCVCOLLAPSED); skb = next; @@ -3145,7 +3187,7 @@ tcp_collapse(struct sock *sk, struct sk_buff *head, nskb->mac.raw = nskb->head + (skb->mac.raw-skb->head); memcpy(nskb->cb, skb->cb, sizeof(skb->cb)); TCP_SKB_CB(nskb)->seq = TCP_SKB_CB(nskb)->end_seq = start; - __skb_insert(nskb, skb->prev, skb, skb->list); + __skb_insert(nskb, skb->prev, skb, list); sk_stream_set_owner_r(nskb, sk); /* Copy data, releasing collapsed skbs. */ @@ -3164,7 +3206,7 @@ tcp_collapse(struct sock *sk, struct sk_buff *head, } if (!before(start, TCP_SKB_CB(skb)->end_seq)) { struct sk_buff *next = skb->next; - __skb_unlink(skb, skb->list); + __skb_unlink(skb, list); __kfree_skb(skb); NET_INC_STATS_BH(LINUX_MIB_TCPRCVCOLLAPSED); skb = next; @@ -3200,7 +3242,8 @@ static void tcp_collapse_ofo_queue(struct sock *sk) if (skb == (struct sk_buff *)&tp->out_of_order_queue || after(TCP_SKB_CB(skb)->seq, end) || before(TCP_SKB_CB(skb)->end_seq, start)) { - tcp_collapse(sk, head, skb, start, end); + tcp_collapse(sk, &tp->out_of_order_queue, + head, skb, start, end); head = skb; if (skb == (struct sk_buff *)&tp->out_of_order_queue) break; @@ -3237,7 +3280,8 @@ static int tcp_prune_queue(struct sock *sk) tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss); tcp_collapse_ofo_queue(sk); - tcp_collapse(sk, sk->sk_receive_queue.next, + tcp_collapse(sk, &sk->sk_receive_queue, + sk->sk_receive_queue.next, (struct sk_buff*)&sk->sk_receive_queue, tp->copied_seq, tp->rcv_nxt); sk_stream_mem_reclaim(sk); @@ -3286,12 +3330,12 @@ void tcp_cwnd_application_limited(struct sock *sk) { struct tcp_sock *tp = tcp_sk(sk); - if (tp->ca_state == TCP_CA_Open && + if (inet_csk(sk)->icsk_ca_state == TCP_CA_Open && sk->sk_socket && !test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { /* Limited by application or receiver window. */ u32 win_used = max(tp->snd_cwnd_used, 2U); if (win_used < tp->snd_cwnd) { - tp->snd_ssthresh = tcp_current_ssthresh(tp); + tp->snd_ssthresh = tcp_current_ssthresh(sk); tp->snd_cwnd = (tp->snd_cwnd + win_used) >> 1; } tp->snd_cwnd_used = 0; @@ -3370,13 +3414,13 @@ static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible) struct tcp_sock *tp = tcp_sk(sk); /* More than one full frame received... */ - if (((tp->rcv_nxt - tp->rcv_wup) > tp->ack.rcv_mss + if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss /* ... and right edge of window advances far enough. * (tcp_recvmsg() will send ACK otherwise). Or... */ && __tcp_select_window(sk) >= tp->rcv_wnd) || /* We ACK each frame or... */ - tcp_in_quickack_mode(tp) || + tcp_in_quickack_mode(sk) || /* We have out of order data. */ (ofo_possible && skb_peek(&tp->out_of_order_queue))) { @@ -3390,8 +3434,7 @@ static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible) static __inline__ void tcp_ack_snd_check(struct sock *sk) { - struct tcp_sock *tp = tcp_sk(sk); - if (!tcp_ack_scheduled(tp)) { + if (!inet_csk_ack_scheduled(sk)) { /* We sent a data segment already. */ return; } @@ -3462,7 +3505,7 @@ static void tcp_check_urg(struct sock * sk, struct tcphdr * th) struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); tp->copied_seq++; if (skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq)) { - __skb_unlink(skb, skb->list); + __skb_unlink(skb, &sk->sk_receive_queue); __kfree_skb(skb); } } @@ -3645,7 +3688,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb, tp->rcv_nxt == tp->rcv_wup) tcp_store_ts_recent(tp); - tcp_rcv_rtt_measure_ts(tp, skb); + tcp_rcv_rtt_measure_ts(sk, skb); /* We know that such packets are checksummed * on entry. @@ -3678,7 +3721,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb, tp->rcv_nxt == tp->rcv_wup) tcp_store_ts_recent(tp); - tcp_rcv_rtt_measure_ts(tp, skb); + tcp_rcv_rtt_measure_ts(sk, skb); __skb_pull(skb, tcp_header_len); tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq; @@ -3699,7 +3742,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb, tp->rcv_nxt == tp->rcv_wup) tcp_store_ts_recent(tp); - tcp_rcv_rtt_measure_ts(tp, skb); + tcp_rcv_rtt_measure_ts(sk, skb); if ((int)skb->truesize > sk->sk_forward_alloc) goto step5; @@ -3719,7 +3762,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb, /* Well, only one small jumplet in fast path... */ tcp_ack(sk, skb, FLAG_DATA); tcp_data_snd_check(sk, tp); - if (!tcp_ack_scheduled(tp)) + if (!inet_csk_ack_scheduled(sk)) goto no_ack; } @@ -3741,7 +3784,7 @@ slow_path: * RFC1323: H1. Apply PAWS check first. */ if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp && - tcp_paws_discard(tp, skb)) { + tcp_paws_discard(sk, skb)) { if (!th->rst) { NET_INC_STATS_BH(LINUX_MIB_PAWSESTABREJECTED); tcp_send_dupack(sk, skb); @@ -3788,7 +3831,7 @@ step5: if(th->ack) tcp_ack(sk, skb, FLAG_SLOWPATH); - tcp_rcv_rtt_measure_ts(tp, skb); + tcp_rcv_rtt_measure_ts(sk, skb); /* Process urgent data. */ tcp_urg(sk, skb, th); @@ -3817,6 +3860,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb, tcp_parse_options(skb, &tp->rx_opt, 0); if (th->ack) { + struct inet_connection_sock *icsk; /* rfc793: * "If the state is SYN-SENT then * first check the ACK bit @@ -3920,7 +3964,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb, tcp_init_metrics(sk); - tcp_init_congestion_control(tp); + tcp_init_congestion_control(sk); /* Prevent spurious tcp_cwnd_restart() on first data * packet. @@ -3930,7 +3974,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb, tcp_init_buffer_space(sk); if (sock_flag(sk, SOCK_KEEPOPEN)) - tcp_reset_keepalive_timer(sk, keepalive_time_when(tp)); + inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tp)); if (!tp->rx_opt.snd_wscale) __tcp_fast_path_on(tp, tp->snd_wnd); @@ -3942,7 +3986,11 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb, sk_wake_async(sk, 0, POLL_OUT); } - if (sk->sk_write_pending || tp->defer_accept || tp->ack.pingpong) { + icsk = inet_csk(sk); + + if (sk->sk_write_pending || + icsk->icsk_accept_queue.rskq_defer_accept || + icsk->icsk_ack.pingpong) { /* Save one ACK. Data will be ready after * several ticks, if write_pending is set. * @@ -3950,12 +3998,13 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb, * look so _wonderfully_ clever, that I was not able * to stand against the temptation 8) --ANK */ - tcp_schedule_ack(tp); - tp->ack.lrcvtime = tcp_time_stamp; - tp->ack.ato = TCP_ATO_MIN; - tcp_incr_quickack(tp); - tcp_enter_quickack_mode(tp); - tcp_reset_xmit_timer(sk, TCP_TIME_DACK, TCP_DELACK_MAX); + inet_csk_schedule_ack(sk); + icsk->icsk_ack.lrcvtime = tcp_time_stamp; + icsk->icsk_ack.ato = TCP_ATO_MIN; + tcp_incr_quickack(sk); + tcp_enter_quickack_mode(sk); + inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, + TCP_DELACK_MAX, TCP_RTO_MAX); discard: __kfree_skb(skb); @@ -4111,7 +4160,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, } if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp && - tcp_paws_discard(tp, skb)) { + tcp_paws_discard(sk, skb)) { if (!th->rst) { NET_INC_STATS_BH(LINUX_MIB_PAWSESTABREJECTED); tcp_send_dupack(sk, skb); @@ -4180,7 +4229,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, */ if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && !tp->srtt) - tcp_ack_saw_tstamp(tp, 0, 0); + tcp_ack_saw_tstamp(sk, NULL, 0); if (tp->rx_opt.tstamp_ok) tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; @@ -4192,7 +4241,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, tcp_init_metrics(sk); - tcp_init_congestion_control(tp); + tcp_init_congestion_control(sk); /* Prevent spurious tcp_cwnd_restart() on * first data packet. @@ -4227,9 +4276,9 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, return 1; } - tmo = tcp_fin_time(tp); + tmo = tcp_fin_time(sk); if (tmo > TCP_TIMEWAIT_LEN) { - tcp_reset_keepalive_timer(sk, tmo - TCP_TIMEWAIT_LEN); + inet_csk_reset_keepalive_timer(sk, tmo - TCP_TIMEWAIT_LEN); } else if (th->fin || sock_owned_by_user(sk)) { /* Bad case. We could lose such FIN otherwise. * It is not a big problem, but it looks confusing @@ -4237,7 +4286,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, * if it spins in bh_lock_sock(), but it is really * marginal case. */ - tcp_reset_keepalive_timer(sk, tmo); + inet_csk_reset_keepalive_timer(sk, tmo); } else { tcp_time_wait(sk, TCP_FIN_WAIT2, tmo); goto discard; |