From 40efc6fa179f440a008333ea98f701bc35a1f97f Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Tue, 3 Jan 2006 16:03:49 -0800 Subject: [TCP]: less inline's TCP inline usage cleanup: * get rid of inline in several places * replace __inline__ with inline where possible * move functions used in one file out of tcp.h * let compiler decide on used once cases On x86_64: text data bss dec hex filename 3594701 648348 567400 4810449 4966d1 vmlinux.orig 3593133 648580 567400 4809113 496199 vmlinux On sparc64: text data bss dec hex filename 2538278 406152 530392 3474822 350586 vmlinux.ORIG 2536382 406384 530392 3473158 34ff06 vmlinux Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- include/net/tcp.h | 193 ++++++++---------------------------------------------- 1 file changed, 27 insertions(+), 166 deletions(-) (limited to 'include/net/tcp.h') diff --git a/include/net/tcp.h b/include/net/tcp.h index 369930497401..77f21c65bbca 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -445,34 +445,16 @@ typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *, extern int tcp_read_sock(struct sock *sk, read_descriptor_t *desc, sk_read_actor_t recv_actor); -/* Initialize RCV_MSS value. - * RCV_MSS is an our guess about MSS used by the peer. - * We haven't any direct information about the MSS. - * It's better to underestimate the RCV_MSS rather than overestimate. - * Overestimations make us ACKing less frequently than needed. - * Underestimations are more easy to detect and fix by tcp_measure_rcv_mss(). - */ +extern void tcp_initialize_rcv_mss(struct sock *sk); -static inline void tcp_initialize_rcv_mss(struct sock *sk) -{ - struct tcp_sock *tp = tcp_sk(sk); - unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache); - - hint = min(hint, tp->rcv_wnd/2); - hint = min(hint, TCP_MIN_RCVMSS); - hint = max(hint, TCP_MIN_MSS); - - inet_csk(sk)->icsk_ack.rcv_mss = hint; -} - -static __inline__ void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd) +static inline void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd) { tp->pred_flags = htonl((tp->tcp_header_len << 26) | ntohl(TCP_FLAG_ACK) | snd_wnd); } -static __inline__ void tcp_fast_path_on(struct tcp_sock *tp) +static inline void tcp_fast_path_on(struct tcp_sock *tp) { __tcp_fast_path_on(tp, tp->snd_wnd >> tp->rx_opt.snd_wscale); } @@ -490,7 +472,7 @@ static inline void tcp_fast_path_check(struct sock *sk, struct tcp_sock *tp) * Rcv_nxt can be after the window if our peer push more data * than the offered window. */ -static __inline__ u32 tcp_receive_window(const struct tcp_sock *tp) +static inline u32 tcp_receive_window(const struct tcp_sock *tp) { s32 win = tp->rcv_wup + tp->rcv_wnd - tp->rcv_nxt; @@ -662,6 +644,7 @@ extern void tcp_cleanup_congestion_control(struct sock *sk); extern int tcp_set_default_congestion_control(const char *name); extern void tcp_get_default_congestion_control(char *name); extern int tcp_set_congestion_control(struct sock *sk, const char *name); +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); @@ -701,7 +684,7 @@ static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event) * "Packets left network, but not honestly ACKed yet" PLUS * "Packets fast retransmitted" */ -static __inline__ unsigned int tcp_packets_in_flight(const struct tcp_sock *tp) +static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp) { return (tp->packets_out - tp->left_out + tp->retrans_out); } @@ -721,33 +704,6 @@ static inline __u32 tcp_current_ssthresh(const struct sock *sk) (tp->snd_cwnd >> 2))); } -/* - * Linear increase during slow start - */ -static inline void tcp_slow_start(struct tcp_sock *tp) -{ - if (sysctl_tcp_abc) { - /* RFC3465: Slow Start - * TCP sender SHOULD increase cwnd by the number of - * previously unacknowledged bytes ACKed by each incoming - * acknowledgment, provided the increase is not more than L - */ - if (tp->bytes_acked < tp->mss_cache) - return; - - /* We MAY increase by 2 if discovered delayed ack */ - if (sysctl_tcp_abc > 1 && tp->bytes_acked > 2*tp->mss_cache) { - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; - } - } - tp->bytes_acked = 0; - - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; -} - - static inline void tcp_sync_left_out(struct tcp_sock *tp) { if (tp->rx_opt.sack_ok && @@ -756,34 +712,7 @@ static inline void tcp_sync_left_out(struct tcp_sock *tp) tp->left_out = tp->sacked_out + tp->lost_out; } -/* Set slow start threshold and cwnd not falling to slow start */ -static inline void __tcp_enter_cwr(struct sock *sk) -{ - const struct inet_connection_sock *icsk = inet_csk(sk); - struct tcp_sock *tp = tcp_sk(sk); - - tp->undo_marker = 0; - tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); - tp->snd_cwnd = min(tp->snd_cwnd, - tcp_packets_in_flight(tp) + 1U); - tp->snd_cwnd_cnt = 0; - tp->high_seq = tp->snd_nxt; - tp->snd_cwnd_stamp = tcp_time_stamp; - TCP_ECN_queue_cwr(tp); -} - -static inline void tcp_enter_cwr(struct sock *sk) -{ - struct tcp_sock *tp = tcp_sk(sk); - - tp->prior_ssthresh = 0; - tp->bytes_acked = 0; - if (inet_csk(sk)->icsk_ca_state < TCP_CA_CWR) { - __tcp_enter_cwr(sk); - tcp_set_ca_state(sk, TCP_CA_CWR); - } -} - +extern void tcp_enter_cwr(struct sock *sk); extern __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst); /* Slow start with delack produces 3 packets of burst, so that @@ -815,14 +744,14 @@ static inline int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) return left <= tcp_max_burst(tp); } -static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss, - const struct sk_buff *skb) +static inline void tcp_minshall_update(struct tcp_sock *tp, int mss, + const struct sk_buff *skb) { if (skb->len < 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) { const struct inet_connection_sock *icsk = inet_csk(sk); if (!tp->packets_out && !icsk->icsk_pending) @@ -830,18 +759,18 @@ static __inline__ void tcp_check_probe_timer(struct sock *sk, struct tcp_sock *t 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, + struct tcp_sock *tp) { __tcp_push_pending_frames(sk, tp, tcp_current_mss(sk, 1), tp->nonagle); } -static __inline__ void tcp_init_wl(struct tcp_sock *tp, u32 ack, u32 seq) +static inline void tcp_init_wl(struct tcp_sock *tp, u32 ack, u32 seq) { tp->snd_wl1 = seq; } -static __inline__ void tcp_update_wl(struct tcp_sock *tp, u32 ack, u32 seq) +static inline void tcp_update_wl(struct tcp_sock *tp, u32 ack, u32 seq) { tp->snd_wl1 = seq; } @@ -849,19 +778,19 @@ static __inline__ void tcp_update_wl(struct tcp_sock *tp, u32 ack, u32 seq) /* * Calculate(/check) TCP checksum */ -static __inline__ u16 tcp_v4_check(struct tcphdr *th, int len, - unsigned long saddr, unsigned long daddr, - unsigned long base) +static inline u16 tcp_v4_check(struct tcphdr *th, int len, + unsigned long saddr, unsigned long daddr, + unsigned long base) { return csum_tcpudp_magic(saddr,daddr,len,IPPROTO_TCP,base); } -static __inline__ int __tcp_checksum_complete(struct sk_buff *skb) +static inline int __tcp_checksum_complete(struct sk_buff *skb) { return __skb_checksum_complete(skb); } -static __inline__ int tcp_checksum_complete(struct sk_buff *skb) +static inline int tcp_checksum_complete(struct sk_buff *skb) { return skb->ip_summed != CHECKSUM_UNNECESSARY && __tcp_checksum_complete(skb); @@ -869,7 +798,7 @@ static __inline__ int tcp_checksum_complete(struct sk_buff *skb) /* Prequeue for VJ style copy to user, combined with checksumming. */ -static __inline__ void tcp_prequeue_init(struct tcp_sock *tp) +static inline void tcp_prequeue_init(struct tcp_sock *tp) { tp->ucopy.task = NULL; tp->ucopy.len = 0; @@ -885,7 +814,7 @@ static __inline__ void tcp_prequeue_init(struct tcp_sock *tp) * * NOTE: is this not too big to inline? */ -static __inline__ int tcp_prequeue(struct sock *sk, struct sk_buff *skb) +static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb) { struct tcp_sock *tp = tcp_sk(sk); @@ -926,7 +855,7 @@ static const char *statename[]={ }; #endif -static __inline__ void tcp_set_state(struct sock *sk, int state) +static inline void tcp_set_state(struct sock *sk, int state) { int oldstate = sk->sk_state; @@ -960,7 +889,7 @@ static __inline__ void tcp_set_state(struct sock *sk, int state) #endif } -static __inline__ void tcp_done(struct sock *sk) +static inline void tcp_done(struct sock *sk) { tcp_set_state(sk, TCP_CLOSE); tcp_clear_xmit_timers(sk); @@ -973,81 +902,13 @@ static __inline__ void tcp_done(struct sock *sk) inet_csk_destroy_sock(sk); } -static __inline__ void tcp_sack_reset(struct tcp_options_received *rx_opt) +static inline void tcp_sack_reset(struct tcp_options_received *rx_opt) { rx_opt->dsack = 0; rx_opt->eff_sacks = 0; rx_opt->num_sacks = 0; } -static __inline__ void tcp_build_and_update_options(__u32 *ptr, struct tcp_sock *tp, __u32 tstamp) -{ - if (tp->rx_opt.tstamp_ok) { - *ptr++ = __constant_htonl((TCPOPT_NOP << 24) | - (TCPOPT_NOP << 16) | - (TCPOPT_TIMESTAMP << 8) | - TCPOLEN_TIMESTAMP); - *ptr++ = htonl(tstamp); - *ptr++ = htonl(tp->rx_opt.ts_recent); - } - if (tp->rx_opt.eff_sacks) { - struct tcp_sack_block *sp = tp->rx_opt.dsack ? tp->duplicate_sack : tp->selective_acks; - int this_sack; - - *ptr++ = htonl((TCPOPT_NOP << 24) | - (TCPOPT_NOP << 16) | - (TCPOPT_SACK << 8) | - (TCPOLEN_SACK_BASE + (tp->rx_opt.eff_sacks * - TCPOLEN_SACK_PERBLOCK))); - for(this_sack = 0; this_sack < tp->rx_opt.eff_sacks; this_sack++) { - *ptr++ = htonl(sp[this_sack].start_seq); - *ptr++ = htonl(sp[this_sack].end_seq); - } - if (tp->rx_opt.dsack) { - tp->rx_opt.dsack = 0; - tp->rx_opt.eff_sacks--; - } - } -} - -/* Construct a tcp options header for a SYN or SYN_ACK packet. - * If this is every changed make sure to change the definition of - * MAX_SYN_SIZE to match the new maximum number of options that you - * can generate. - */ -static inline void tcp_syn_build_options(__u32 *ptr, int mss, int ts, int sack, - int offer_wscale, int wscale, __u32 tstamp, __u32 ts_recent) -{ - /* We always get an MSS option. - * The option bytes which will be seen in normal data - * packets should timestamps be used, must be in the MSS - * advertised. But we subtract them from tp->mss_cache so - * that calculations in tcp_sendmsg are simpler etc. - * So account for this fact here if necessary. If we - * don't do this correctly, as a receiver we won't - * recognize data packets as being full sized when we - * should, and thus we won't abide by the delayed ACK - * rules correctly. - * SACKs don't matter, we never delay an ACK when we - * have any of those going out. - */ - *ptr++ = htonl((TCPOPT_MSS << 24) | (TCPOLEN_MSS << 16) | mss); - if (ts) { - if(sack) - *ptr++ = __constant_htonl((TCPOPT_SACK_PERM << 24) | (TCPOLEN_SACK_PERM << 16) | - (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP); - else - *ptr++ = __constant_htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | - (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP); - *ptr++ = htonl(tstamp); /* TSVAL */ - *ptr++ = htonl(ts_recent); /* TSECR */ - } else if(sack) - *ptr++ = __constant_htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | - (TCPOPT_SACK_PERM << 8) | TCPOLEN_SACK_PERM); - if (offer_wscale) - *ptr++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_WINDOW << 16) | (TCPOLEN_WINDOW << 8) | (wscale)); -} - /* Determine a window scaling and initial window to offer. */ extern void tcp_select_initial_window(int __space, __u32 mss, __u32 *rcv_wnd, __u32 *window_clamp, @@ -1072,9 +933,9 @@ static inline int tcp_full_space(const struct sock *sk) return tcp_win_from_space(sk->sk_rcvbuf); } -static __inline__ void tcp_openreq_init(struct request_sock *req, - struct tcp_options_received *rx_opt, - struct sk_buff *skb) +static inline void tcp_openreq_init(struct request_sock *req, + struct tcp_options_received *rx_opt, + struct sk_buff *skb) { struct inet_request_sock *ireq = inet_rsk(req); -- cgit v1.2.1