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authorArnaldo Carvalho de Melo <acme@mandriva.com>2005-08-10 03:03:31 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-29 18:56:18 -0400
commit6687e988d9aeaccad6774e6a8304f681f3ec0a03 (patch)
treeecd3d28f9989847aa1dcde4782de0210aeadc290
parent64ce207306debd7157f47282be94770407bec01c (diff)
[ICSK]: Move TCP congestion avoidance members to icsk
This changeset basically moves tcp_sk()->{ca_ops,ca_state,etc} to inet_csk(), minimal renaming/moving done in this changeset to ease review. Most of it is just changes of struct tcp_sock * to struct sock * parameters. With this we move to a state closer to two interesting goals: 1. Generalisation of net/ipv4/tcp_diag.c, becoming inet_diag.c, being used for any INET transport protocol that has struct inet_hashinfo and are derived from struct inet_connection_sock. Keeps the userspace API, that will just not display DCCP sockets, while newer versions of tools can support DCCP. 2. INET generic transport pluggable Congestion Avoidance infrastructure, using the current TCP CA infrastructure with DCCP. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat
-rw-r--r--include/linux/tcp.h21
-rw-r--r--include/net/inet_connection_sock.h15
-rw-r--r--include/net/tcp.h74
-rw-r--r--net/ipv4/inet_connection_sock.c3
-rw-r--r--net/ipv4/tcp.c12
-rw-r--r--net/ipv4/tcp_bic.c46
-rw-r--r--net/ipv4/tcp_cong.c44
-rw-r--r--net/ipv4/tcp_diag.c16
-rw-r--r--net/ipv4/tcp_highspeed.c17
-rw-r--r--net/ipv4/tcp_htcp.c53
-rw-r--r--net/ipv4/tcp_hybla.c31
-rw-r--r--net/ipv4/tcp_input.c223
-rw-r--r--net/ipv4/tcp_ipv4.c9
-rw-r--r--net/ipv4/tcp_minisocks.c5
-rw-r--r--net/ipv4/tcp_output.c36
-rw-r--r--net/ipv4/tcp_scalable.c6
-rw-r--r--net/ipv4/tcp_timer.c26
-rw-r--r--net/ipv4/tcp_vegas.c44
-rw-r--r--net/ipv4/tcp_westwood.c58
-rw-r--r--net/ipv6/tcp_ipv6.c7
20 files changed, 412 insertions, 334 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 620096840744..ac4ca44c75ca 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -258,19 +258,15 @@ struct tcp_sock {
258 __u32 mss_cache; /* Cached effective mss, not including SACKS */ 258 __u32 mss_cache; /* Cached effective mss, not including SACKS */
259 __u16 xmit_size_goal; /* Goal for segmenting output packets */ 259 __u16 xmit_size_goal; /* Goal for segmenting output packets */
260 __u16 ext_header_len; /* Network protocol overhead (IP/IPv6 options) */ 260 __u16 ext_header_len; /* Network protocol overhead (IP/IPv6 options) */
261 __u8 ca_state; /* State of fast-retransmit machine */
262 261
263 __u8 keepalive_probes; /* num of allowed keep alive probes */
264 __u16 advmss; /* Advertised MSS */
265 __u32 window_clamp; /* Maximal window to advertise */ 262 __u32 window_clamp; /* Maximal window to advertise */
266 __u32 rcv_ssthresh; /* Current window clamp */ 263 __u32 rcv_ssthresh; /* Current window clamp */
267 264
268 __u32 frto_highmark; /* snd_nxt when RTO occurred */ 265 __u32 frto_highmark; /* snd_nxt when RTO occurred */
269 __u8 reordering; /* Packet reordering metric. */ 266 __u8 reordering; /* Packet reordering metric. */
270 __u8 frto_counter; /* Number of new acks after RTO */ 267 __u8 frto_counter; /* Number of new acks after RTO */
271
272 __u8 nonagle; /* Disable Nagle algorithm? */ 268 __u8 nonagle; /* Disable Nagle algorithm? */
273 /* ONE BYTE HOLE, TRY TO PACK */ 269 __u8 keepalive_probes; /* num of allowed keep alive probes */
274 270
275/* RTT measurement */ 271/* RTT measurement */
276 __u32 srtt; /* smoothed round trip time << 3 */ 272 __u32 srtt; /* smoothed round trip time << 3 */
@@ -311,8 +307,7 @@ struct tcp_sock {
311 struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */ 307 struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */
312 struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/ 308 struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/
313 309
314 __u8 probes_out; /* unanswered 0 window probes */ 310 __u16 advmss; /* Advertised MSS */
315 __u8 ecn_flags; /* ECN status bits. */
316 __u16 prior_ssthresh; /* ssthresh saved at recovery start */ 311 __u16 prior_ssthresh; /* ssthresh saved at recovery start */
317 __u32 lost_out; /* Lost packets */ 312 __u32 lost_out; /* Lost packets */
318 __u32 sacked_out; /* SACK'd packets */ 313 __u32 sacked_out; /* SACK'd packets */
@@ -327,7 +322,7 @@ struct tcp_sock {
327 __u32 urg_seq; /* Seq of received urgent pointer */ 322 __u32 urg_seq; /* Seq of received urgent pointer */
328 __u16 urg_data; /* Saved octet of OOB data and control flags */ 323 __u16 urg_data; /* Saved octet of OOB data and control flags */
329 __u8 urg_mode; /* In urgent mode */ 324 __u8 urg_mode; /* In urgent mode */
330 /* ONE BYTE HOLE, TRY TO PACK! */ 325 __u8 ecn_flags; /* ECN status bits. */
331 __u32 snd_up; /* Urgent pointer */ 326 __u32 snd_up; /* Urgent pointer */
332 327
333 __u32 total_retrans; /* Total retransmits for entire connection */ 328 __u32 total_retrans; /* Total retransmits for entire connection */
@@ -351,11 +346,6 @@ struct tcp_sock {
351 __u32 seq; 346 __u32 seq;
352 __u32 time; 347 __u32 time;
353 } rcvq_space; 348 } rcvq_space;
354
355 /* Pluggable TCP congestion control hook */
356 struct tcp_congestion_ops *ca_ops;
357 u32 ca_priv[16];
358#define TCP_CA_PRIV_SIZE (16*sizeof(u32))
359}; 349};
360 350
361static inline struct tcp_sock *tcp_sk(const struct sock *sk) 351static inline struct tcp_sock *tcp_sk(const struct sock *sk)
@@ -377,11 +367,6 @@ static inline struct tcp_timewait_sock *tcp_twsk(const struct sock *sk)
377 return (struct tcp_timewait_sock *)sk; 367 return (struct tcp_timewait_sock *)sk;
378} 368}
379 369
380static inline void *tcp_ca(const struct tcp_sock *tp)
381{
382 return (void *) tp->ca_priv;
383}
384
385#endif 370#endif
386 371
387#endif /* _LINUX_TCP_H */ 372#endif /* _LINUX_TCP_H */
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index bec19d5cff26..4d7e708c07d1 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -27,6 +27,7 @@
27 27
28struct inet_bind_bucket; 28struct inet_bind_bucket;
29struct inet_hashinfo; 29struct inet_hashinfo;
30struct tcp_congestion_ops;
30 31
31/** inet_connection_sock - INET connection oriented sock 32/** inet_connection_sock - INET connection oriented sock
32 * 33 *
@@ -35,10 +36,13 @@ struct inet_hashinfo;
35 * @icsk_timeout: Timeout 36 * @icsk_timeout: Timeout
36 * @icsk_retransmit_timer: Resend (no ack) 37 * @icsk_retransmit_timer: Resend (no ack)
37 * @icsk_rto: Retransmit timeout 38 * @icsk_rto: Retransmit timeout
39 * @icsk_ca_ops Pluggable congestion control hook
40 * @icsk_ca_state: Congestion control state
38 * @icsk_retransmits: Number of unrecovered [RTO] timeouts 41 * @icsk_retransmits: Number of unrecovered [RTO] timeouts
39 * @icsk_pending: Scheduled timer event 42 * @icsk_pending: Scheduled timer event
40 * @icsk_backoff: Backoff 43 * @icsk_backoff: Backoff
41 * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries 44 * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
45 * @icsk_probes_out: unanswered 0 window probes
42 * @icsk_ack: Delayed ACK control data 46 * @icsk_ack: Delayed ACK control data
43 */ 47 */
44struct inet_connection_sock { 48struct inet_connection_sock {
@@ -50,10 +54,14 @@ struct inet_connection_sock {
50 struct timer_list icsk_retransmit_timer; 54 struct timer_list icsk_retransmit_timer;
51 struct timer_list icsk_delack_timer; 55 struct timer_list icsk_delack_timer;
52 __u32 icsk_rto; 56 __u32 icsk_rto;
57 struct tcp_congestion_ops *icsk_ca_ops;
58 __u8 icsk_ca_state;
53 __u8 icsk_retransmits; 59 __u8 icsk_retransmits;
54 __u8 icsk_pending; 60 __u8 icsk_pending;
55 __u8 icsk_backoff; 61 __u8 icsk_backoff;
56 __u8 icsk_syn_retries; 62 __u8 icsk_syn_retries;
63 __u8 icsk_probes_out;
64 /* 2 BYTES HOLE, TRY TO PACK! */
57 struct { 65 struct {
58 __u8 pending; /* ACK is pending */ 66 __u8 pending; /* ACK is pending */
59 __u8 quick; /* Scheduled number of quick acks */ 67 __u8 quick; /* Scheduled number of quick acks */
@@ -65,6 +73,8 @@ struct inet_connection_sock {
65 __u16 last_seg_size; /* Size of last incoming segment */ 73 __u16 last_seg_size; /* Size of last incoming segment */
66 __u16 rcv_mss; /* MSS used for delayed ACK decisions */ 74 __u16 rcv_mss; /* MSS used for delayed ACK decisions */
67 } icsk_ack; 75 } icsk_ack;
76 u32 icsk_ca_priv[16];
77#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32))
68}; 78};
69 79
70#define ICSK_TIME_RETRANS 1 /* Retransmit timer */ 80#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
@@ -77,6 +87,11 @@ static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
77 return (struct inet_connection_sock *)sk; 87 return (struct inet_connection_sock *)sk;
78} 88}
79 89
90static inline void *inet_csk_ca(const struct sock *sk)
91{
92 return (void *)inet_csk(sk)->icsk_ca_priv;
93}
94
80extern struct sock *inet_csk_clone(struct sock *sk, 95extern struct sock *inet_csk_clone(struct sock *sk,
81 const struct request_sock *req, 96 const struct request_sock *req,
82 const unsigned int __nocast priority); 97 const unsigned int __nocast priority);
diff --git a/include/net/tcp.h b/include/net/tcp.h
index d489ac548e4b..0b3f7294c5c7 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -669,29 +669,29 @@ struct tcp_congestion_ops {
669 struct list_head list; 669 struct list_head list;
670 670
671 /* initialize private data (optional) */ 671 /* initialize private data (optional) */
672 void (*init)(struct tcp_sock *tp); 672 void (*init)(struct sock *sk);
673 /* cleanup private data (optional) */ 673 /* cleanup private data (optional) */
674 void (*release)(struct tcp_sock *tp); 674 void (*release)(struct sock *sk);
675 675
676 /* return slow start threshold (required) */ 676 /* return slow start threshold (required) */
677 u32 (*ssthresh)(struct tcp_sock *tp); 677 u32 (*ssthresh)(struct sock *sk);
678 /* lower bound for congestion window (optional) */ 678 /* lower bound for congestion window (optional) */
679 u32 (*min_cwnd)(struct tcp_sock *tp); 679 u32 (*min_cwnd)(struct sock *sk);
680 /* do new cwnd calculation (required) */ 680 /* do new cwnd calculation (required) */
681 void (*cong_avoid)(struct tcp_sock *tp, u32 ack, 681 void (*cong_avoid)(struct sock *sk, u32 ack,
682 u32 rtt, u32 in_flight, int good_ack); 682 u32 rtt, u32 in_flight, int good_ack);
683 /* round trip time sample per acked packet (optional) */ 683 /* round trip time sample per acked packet (optional) */
684 void (*rtt_sample)(struct tcp_sock *tp, u32 usrtt); 684 void (*rtt_sample)(struct sock *sk, u32 usrtt);
685 /* call before changing ca_state (optional) */ 685 /* call before changing ca_state (optional) */
686 void (*set_state)(struct tcp_sock *tp, u8 new_state); 686 void (*set_state)(struct sock *sk, u8 new_state);
687 /* call when cwnd event occurs (optional) */ 687 /* call when cwnd event occurs (optional) */
688 void (*cwnd_event)(struct tcp_sock *tp, enum tcp_ca_event ev); 688 void (*cwnd_event)(struct sock *sk, enum tcp_ca_event ev);
689 /* new value of cwnd after loss (optional) */ 689 /* new value of cwnd after loss (optional) */
690 u32 (*undo_cwnd)(struct tcp_sock *tp); 690 u32 (*undo_cwnd)(struct sock *sk);
691 /* hook for packet ack accounting (optional) */ 691 /* hook for packet ack accounting (optional) */
692 void (*pkts_acked)(struct tcp_sock *tp, u32 num_acked); 692 void (*pkts_acked)(struct sock *sk, u32 num_acked);
693 /* get info for tcp_diag (optional) */ 693 /* get info for tcp_diag (optional) */
694 void (*get_info)(struct tcp_sock *tp, u32 ext, struct sk_buff *skb); 694 void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb);
695 695
696 char name[TCP_CA_NAME_MAX]; 696 char name[TCP_CA_NAME_MAX];
697 struct module *owner; 697 struct module *owner;
@@ -700,30 +700,34 @@ struct tcp_congestion_ops {
700extern int tcp_register_congestion_control(struct tcp_congestion_ops *type); 700extern int tcp_register_congestion_control(struct tcp_congestion_ops *type);
701extern void tcp_unregister_congestion_control(struct tcp_congestion_ops *type); 701extern void tcp_unregister_congestion_control(struct tcp_congestion_ops *type);
702 702
703extern void tcp_init_congestion_control(struct tcp_sock *tp); 703extern void tcp_init_congestion_control(struct sock *sk);
704extern void tcp_cleanup_congestion_control(struct tcp_sock *tp); 704extern void tcp_cleanup_congestion_control(struct sock *sk);
705extern int tcp_set_default_congestion_control(const char *name); 705extern int tcp_set_default_congestion_control(const char *name);
706extern void tcp_get_default_congestion_control(char *name); 706extern void tcp_get_default_congestion_control(char *name);
707extern int tcp_set_congestion_control(struct tcp_sock *tp, const char *name); 707extern int tcp_set_congestion_control(struct sock *sk, const char *name);
708 708
709extern struct tcp_congestion_ops tcp_init_congestion_ops; 709extern struct tcp_congestion_ops tcp_init_congestion_ops;
710extern u32 tcp_reno_ssthresh(struct tcp_sock *tp); 710extern u32 tcp_reno_ssthresh(struct sock *sk);
711extern void tcp_reno_cong_avoid(struct tcp_sock *tp, u32 ack, 711extern void tcp_reno_cong_avoid(struct sock *sk, u32 ack,
712 u32 rtt, u32 in_flight, int flag); 712 u32 rtt, u32 in_flight, int flag);
713extern u32 tcp_reno_min_cwnd(struct tcp_sock *tp); 713extern u32 tcp_reno_min_cwnd(struct sock *sk);
714extern struct tcp_congestion_ops tcp_reno; 714extern struct tcp_congestion_ops tcp_reno;
715 715
716static inline void tcp_set_ca_state(struct tcp_sock *tp, u8 ca_state) 716static inline void tcp_set_ca_state(struct sock *sk, const u8 ca_state)
717{ 717{
718 if (tp->ca_ops->set_state) 718 struct inet_connection_sock *icsk = inet_csk(sk);
719 tp->ca_ops->set_state(tp, ca_state); 719
720 tp->ca_state = ca_state; 720 if (icsk->icsk_ca_ops->set_state)
721 icsk->icsk_ca_ops->set_state(sk, ca_state);
722 icsk->icsk_ca_state = ca_state;
721} 723}
722 724
723static inline void tcp_ca_event(struct tcp_sock *tp, enum tcp_ca_event event) 725static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
724{ 726{
725 if (tp->ca_ops->cwnd_event) 727 const struct inet_connection_sock *icsk = inet_csk(sk);
726 tp->ca_ops->cwnd_event(tp, event); 728
729 if (icsk->icsk_ca_ops->cwnd_event)
730 icsk->icsk_ca_ops->cwnd_event(sk, event);
727} 731}
728 732
729/* This determines how many packets are "in the network" to the best 733/* This determines how many packets are "in the network" to the best
@@ -749,9 +753,10 @@ static __inline__ unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
749 * The exception is rate halving phase, when cwnd is decreasing towards 753 * The exception is rate halving phase, when cwnd is decreasing towards
750 * ssthresh. 754 * ssthresh.
751 */ 755 */
752static inline __u32 tcp_current_ssthresh(struct tcp_sock *tp) 756static inline __u32 tcp_current_ssthresh(const struct sock *sk)
753{ 757{
754 if ((1<<tp->ca_state)&(TCPF_CA_CWR|TCPF_CA_Recovery)) 758 const struct tcp_sock *tp = tcp_sk(sk);
759 if ((1 << inet_csk(sk)->icsk_ca_state) & (TCPF_CA_CWR | TCPF_CA_Recovery))
755 return tp->snd_ssthresh; 760 return tp->snd_ssthresh;
756 else 761 else
757 return max(tp->snd_ssthresh, 762 return max(tp->snd_ssthresh,
@@ -768,10 +773,13 @@ static inline void tcp_sync_left_out(struct tcp_sock *tp)
768} 773}
769 774
770/* Set slow start threshold and cwnd not falling to slow start */ 775/* Set slow start threshold and cwnd not falling to slow start */
771static inline void __tcp_enter_cwr(struct tcp_sock *tp) 776static inline void __tcp_enter_cwr(struct sock *sk)
772{ 777{
778 const struct inet_connection_sock *icsk = inet_csk(sk);
779 struct tcp_sock *tp = tcp_sk(sk);
780
773 tp->undo_marker = 0; 781 tp->undo_marker = 0;
774 tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); 782 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
775 tp->snd_cwnd = min(tp->snd_cwnd, 783 tp->snd_cwnd = min(tp->snd_cwnd,
776 tcp_packets_in_flight(tp) + 1U); 784 tcp_packets_in_flight(tp) + 1U);
777 tp->snd_cwnd_cnt = 0; 785 tp->snd_cwnd_cnt = 0;
@@ -780,12 +788,14 @@ static inline void __tcp_enter_cwr(struct tcp_sock *tp)
780 TCP_ECN_queue_cwr(tp); 788 TCP_ECN_queue_cwr(tp);
781} 789}
782 790
783static inline void tcp_enter_cwr(struct tcp_sock *tp) 791static inline void tcp_enter_cwr(struct sock *sk)
784{ 792{
793 struct tcp_sock *tp = tcp_sk(sk);
794
785 tp->prior_ssthresh = 0; 795 tp->prior_ssthresh = 0;
786 if (tp->ca_state < TCP_CA_CWR) { 796 if (inet_csk(sk)->icsk_ca_state < TCP_CA_CWR) {
787 __tcp_enter_cwr(tp); 797 __tcp_enter_cwr(sk);
788 tcp_set_ca_state(tp, TCP_CA_CWR); 798 tcp_set_ca_state(sk, TCP_CA_CWR);
789 } 799 }
790} 800}
791 801
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 026630a15ea0..fe3c6d3d0c91 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -508,7 +508,8 @@ struct sock *inet_csk_clone(struct sock *sk, const struct request_sock *req,
508 newsk->sk_write_space = sk_stream_write_space; 508 newsk->sk_write_space = sk_stream_write_space;
509 509
510 newicsk->icsk_retransmits = 0; 510 newicsk->icsk_retransmits = 0;
511 newicsk->icsk_backoff = 0; 511 newicsk->icsk_backoff = 0;
512 newicsk->icsk_probes_out = 0;
512 513
513 /* Deinitialize accept_queue to trap illegal accesses. */ 514 /* Deinitialize accept_queue to trap illegal accesses. */
514 memset(&newicsk->icsk_accept_queue, 0, sizeof(newicsk->icsk_accept_queue)); 515 memset(&newicsk->icsk_accept_queue, 0, sizeof(newicsk->icsk_accept_queue));
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 0eed64a1991d..02848e72e9c1 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1671,11 +1671,11 @@ int tcp_disconnect(struct sock *sk, int flags)
1671 tp->write_seq = 1; 1671 tp->write_seq = 1;
1672 icsk->icsk_backoff = 0; 1672 icsk->icsk_backoff = 0;
1673 tp->snd_cwnd = 2; 1673 tp->snd_cwnd = 2;
1674 tp->probes_out = 0; 1674 icsk->icsk_probes_out = 0;
1675 tp->packets_out = 0; 1675 tp->packets_out = 0;
1676 tp->snd_ssthresh = 0x7fffffff; 1676 tp->snd_ssthresh = 0x7fffffff;
1677 tp->snd_cwnd_cnt = 0; 1677 tp->snd_cwnd_cnt = 0;
1678 tcp_set_ca_state(tp, TCP_CA_Open); 1678 tcp_set_ca_state(sk, TCP_CA_Open);
1679 tcp_clear_retrans(tp); 1679 tcp_clear_retrans(tp);
1680 inet_csk_delack_init(sk); 1680 inet_csk_delack_init(sk);
1681 sk->sk_send_head = NULL; 1681 sk->sk_send_head = NULL;
@@ -1718,7 +1718,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
1718 name[val] = 0; 1718 name[val] = 0;
1719 1719
1720 lock_sock(sk); 1720 lock_sock(sk);
1721 err = tcp_set_congestion_control(tp, name); 1721 err = tcp_set_congestion_control(sk, name);
1722 release_sock(sk); 1722 release_sock(sk);
1723 return err; 1723 return err;
1724 } 1724 }
@@ -1886,9 +1886,9 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
1886 memset(info, 0, sizeof(*info)); 1886 memset(info, 0, sizeof(*info));
1887 1887
1888 info->tcpi_state = sk->sk_state; 1888 info->tcpi_state = sk->sk_state;
1889 info->tcpi_ca_state = tp->ca_state; 1889 info->tcpi_ca_state = icsk->icsk_ca_state;
1890 info->tcpi_retransmits = icsk->icsk_retransmits; 1890 info->tcpi_retransmits = icsk->icsk_retransmits;
1891 info->tcpi_probes = tp->probes_out; 1891 info->tcpi_probes = icsk->icsk_probes_out;
1892 info->tcpi_backoff = icsk->icsk_backoff; 1892 info->tcpi_backoff = icsk->icsk_backoff;
1893 1893
1894 if (tp->rx_opt.tstamp_ok) 1894 if (tp->rx_opt.tstamp_ok)
@@ -2016,7 +2016,7 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
2016 len = min_t(unsigned int, len, TCP_CA_NAME_MAX); 2016 len = min_t(unsigned int, len, TCP_CA_NAME_MAX);
2017 if (put_user(len, optlen)) 2017 if (put_user(len, optlen))
2018 return -EFAULT; 2018 return -EFAULT;
2019 if (copy_to_user(optval, tp->ca_ops->name, len)) 2019 if (copy_to_user(optval, icsk->icsk_ca_ops->name, len))
2020 return -EFAULT; 2020 return -EFAULT;
2021 return 0; 2021 return 0;
2022 default: 2022 default:
diff --git a/net/ipv4/tcp_bic.c b/net/ipv4/tcp_bic.c
index ec38d45d6649..b940346de4e7 100644
--- a/net/ipv4/tcp_bic.c
+++ b/net/ipv4/tcp_bic.c
@@ -86,11 +86,11 @@ static inline void bictcp_reset(struct bictcp *ca)
86 ca->delayed_ack = 2 << ACK_RATIO_SHIFT; 86 ca->delayed_ack = 2 << ACK_RATIO_SHIFT;
87} 87}
88 88
89static void bictcp_init(struct tcp_sock *tp) 89static void bictcp_init(struct sock *sk)
90{ 90{
91 bictcp_reset(tcp_ca(tp)); 91 bictcp_reset(inet_csk_ca(sk));
92 if (initial_ssthresh) 92 if (initial_ssthresh)
93 tp->snd_ssthresh = initial_ssthresh; 93 tcp_sk(sk)->snd_ssthresh = initial_ssthresh;
94} 94}
95 95
96/* 96/*
@@ -156,9 +156,10 @@ static inline void bictcp_update(struct bictcp *ca, u32 cwnd)
156 156
157 157
158/* Detect low utilization in congestion avoidance */ 158/* Detect low utilization in congestion avoidance */
159static inline void bictcp_low_utilization(struct tcp_sock *tp, int flag) 159static inline void bictcp_low_utilization(struct sock *sk, int flag)
160{ 160{
161 struct bictcp *ca = tcp_ca(tp); 161 const struct tcp_sock *tp = tcp_sk(sk);
162 struct bictcp *ca = inet_csk_ca(sk);
162 u32 dist, delay; 163 u32 dist, delay;
163 164
164 /* No time stamp */ 165 /* No time stamp */
@@ -208,12 +209,13 @@ static inline void bictcp_low_utilization(struct tcp_sock *tp, int flag)
208 209
209} 210}
210 211
211static void bictcp_cong_avoid(struct tcp_sock *tp, u32 ack, 212static void bictcp_cong_avoid(struct sock *sk, u32 ack,
212 u32 seq_rtt, u32 in_flight, int data_acked) 213 u32 seq_rtt, u32 in_flight, int data_acked)
213{ 214{
214 struct bictcp *ca = tcp_ca(tp); 215 struct tcp_sock *tp = tcp_sk(sk);
216 struct bictcp *ca = inet_csk_ca(sk);
215 217
216 bictcp_low_utilization(tp, data_acked); 218 bictcp_low_utilization(sk, data_acked);
217 219
218 if (in_flight < tp->snd_cwnd) 220 if (in_flight < tp->snd_cwnd)
219 return; 221 return;
@@ -242,9 +244,10 @@ static void bictcp_cong_avoid(struct tcp_sock *tp, u32 ack,
242 * behave like Reno until low_window is reached, 244 * behave like Reno until low_window is reached,
243 * then increase congestion window slowly 245 * then increase congestion window slowly
244 */ 246 */
245static u32 bictcp_recalc_ssthresh(struct tcp_sock *tp) 247static u32 bictcp_recalc_ssthresh(struct sock *sk)
246{ 248{
247 struct bictcp *ca = tcp_ca(tp); 249 const struct tcp_sock *tp = tcp_sk(sk);
250 struct bictcp *ca = inet_csk_ca(sk);
248 251
249 ca->epoch_start = 0; /* end of epoch */ 252 ca->epoch_start = 0; /* end of epoch */
250 253
@@ -269,31 +272,34 @@ static u32 bictcp_recalc_ssthresh(struct tcp_sock *tp)
269 return max((tp->snd_cwnd * beta) / BICTCP_BETA_SCALE, 2U); 272 return max((tp->snd_cwnd * beta) / BICTCP_BETA_SCALE, 2U);
270} 273}
271 274
272static u32 bictcp_undo_cwnd(struct tcp_sock *tp) 275static u32 bictcp_undo_cwnd(struct sock *sk)
273{ 276{
274 struct bictcp *ca = tcp_ca(tp); 277 const struct tcp_sock *tp = tcp_sk(sk);
275 278 const struct bictcp *ca = inet_csk_ca(sk);
276 return max(tp->snd_cwnd, ca->last_max_cwnd); 279 return max(tp->snd_cwnd, ca->last_max_cwnd);
277} 280}
278 281
279static u32 bictcp_min_cwnd(struct tcp_sock *tp) 282static u32 bictcp_min_cwnd(struct sock *sk)
280{ 283{
284 const struct tcp_sock *tp = tcp_sk(sk);
281 return tp->snd_ssthresh; 285 return tp->snd_ssthresh;
282} 286}
283 287
284static void bictcp_state(struct tcp_sock *tp, u8 new_state) 288static void bictcp_state(struct sock *sk, u8 new_state)
285{ 289{
286 if (new_state == TCP_CA_Loss) 290 if (new_state == TCP_CA_Loss)
287 bictcp_reset(tcp_ca(tp)); 291 bictcp_reset(inet_csk_ca(sk));
288} 292}
289 293
290/* Track delayed acknowledgement ratio using sliding window 294/* Track delayed acknowledgement ratio using sliding window
291 * ratio = (15*ratio + sample) / 16 295 * ratio = (15*ratio + sample) / 16
292 */ 296 */
293static void bictcp_acked(struct tcp_sock *tp, u32 cnt) 297static void bictcp_acked(struct sock *sk, u32 cnt)
294{ 298{
295 if (cnt > 0 && tp->ca_state == TCP_CA_Open) { 299 const struct inet_connection_sock *icsk = inet_csk(sk);
296 struct bictcp *ca = tcp_ca(tp); 300
301 if (cnt > 0 && icsk->icsk_ca_state == TCP_CA_Open) {
302 struct bictcp *ca = inet_csk_ca(sk);
297 cnt -= ca->delayed_ack >> ACK_RATIO_SHIFT; 303 cnt -= ca->delayed_ack >> ACK_RATIO_SHIFT;
298 ca->delayed_ack += cnt; 304 ca->delayed_ack += cnt;
299 } 305 }
@@ -314,7 +320,7 @@ static struct tcp_congestion_ops bictcp = {
314 320
315static int __init bictcp_register(void) 321static int __init bictcp_register(void)
316{ 322{
317 BUG_ON(sizeof(struct bictcp) > TCP_CA_PRIV_SIZE); 323 BUG_ON(sizeof(struct bictcp) > ICSK_CA_PRIV_SIZE);
318 return tcp_register_congestion_control(&bictcp); 324 return tcp_register_congestion_control(&bictcp);
319} 325}
320 326
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index 4970d10a7785..bbf2d6624e89 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -73,33 +73,36 @@ void tcp_unregister_congestion_control(struct tcp_congestion_ops *ca)
73EXPORT_SYMBOL_GPL(tcp_unregister_congestion_control); 73EXPORT_SYMBOL_GPL(tcp_unregister_congestion_control);
74 74
75/* Assign choice of congestion control. */ 75/* Assign choice of congestion control. */
76void tcp_init_congestion_control(struct tcp_sock *tp) 76void tcp_init_congestion_control(struct sock *sk)
77{ 77{
78 struct inet_connection_sock *icsk = inet_csk(sk);
78 struct tcp_congestion_ops *ca; 79 struct tcp_congestion_ops *ca;
79 80
80 if (tp->ca_ops != &tcp_init_congestion_ops) 81 if (icsk->icsk_ca_ops != &tcp_init_congestion_ops)
81 return; 82 return;
82 83
83 rcu_read_lock(); 84 rcu_read_lock();
84 list_for_each_entry_rcu(ca, &tcp_cong_list, list) { 85 list_for_each_entry_rcu(ca, &tcp_cong_list, list) {
85 if (try_module_get(ca->owner)) { 86 if (try_module_get(ca->owner)) {
86 tp->ca_ops = ca; 87 icsk->icsk_ca_ops = ca;
87 break; 88 break;
88 } 89 }
89 90
90 } 91 }
91 rcu_read_unlock(); 92 rcu_read_unlock();
92 93
93 if (tp->ca_ops->init) 94 if (icsk->icsk_ca_ops->init)
94 tp->ca_ops->init(tp); 95 icsk->icsk_ca_ops->init(sk);
95} 96}
96 97
97/* Manage refcounts on socket close. */ 98/* Manage refcounts on socket close. */
98void tcp_cleanup_congestion_control(struct tcp_sock *tp) 99void tcp_cleanup_congestion_control(struct sock *sk)
99{ 100{
100 if (tp->ca_ops->release) 101 struct inet_connection_sock *icsk = inet_csk(sk);
101 tp->ca_ops->release(tp); 102
102 module_put(tp->ca_ops->owner); 103 if (icsk->icsk_ca_ops->release)
104 icsk->icsk_ca_ops->release(sk);
105 module_put(icsk->icsk_ca_ops->owner);
103} 106}
104 107
105/* Used by sysctl to change default congestion control */ 108/* Used by sysctl to change default congestion control */
@@ -143,14 +146,15 @@ void tcp_get_default_congestion_control(char *name)
143} 146}
144 147
145/* Change congestion control for socket */ 148/* Change congestion control for socket */
146int tcp_set_congestion_control(struct tcp_sock *tp, const char *name) 149int tcp_set_congestion_control(struct sock *sk, const char *name)
147{ 150{
151 struct inet_connection_sock *icsk = inet_csk(sk);
148 struct tcp_congestion_ops *ca; 152 struct tcp_congestion_ops *ca;
149 int err = 0; 153 int err = 0;
150 154
151 rcu_read_lock(); 155 rcu_read_lock();
152 ca = tcp_ca_find(name); 156 ca = tcp_ca_find(name);
153 if (ca == tp->ca_ops) 157 if (ca == icsk->icsk_ca_ops)
154 goto out; 158 goto out;
155 159
156 if (!ca) 160 if (!ca)
@@ -160,10 +164,10 @@ int tcp_set_congestion_control(struct tcp_sock *tp, const char *name)
160 err = -EBUSY; 164 err = -EBUSY;
161 165
162 else { 166 else {
163 tcp_cleanup_congestion_control(tp); 167 tcp_cleanup_congestion_control(sk);
164 tp->ca_ops = ca; 168 icsk->icsk_ca_ops = ca;
165 if (tp->ca_ops->init) 169 if (icsk->icsk_ca_ops->init)
166 tp->ca_ops->init(tp); 170 icsk->icsk_ca_ops->init(sk);
167 } 171 }
168 out: 172 out:
169 rcu_read_unlock(); 173 rcu_read_unlock();
@@ -177,9 +181,11 @@ int tcp_set_congestion_control(struct tcp_sock *tp, const char *name)
177/* This is Jacobson's slow start and congestion avoidance. 181/* This is Jacobson's slow start and congestion avoidance.
178 * SIGCOMM '88, p. 328. 182 * SIGCOMM '88, p. 328.
179 */ 183 */
180void tcp_reno_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, u32 in_flight, 184void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight,
181 int flag) 185 int flag)
182{ 186{
187 struct tcp_sock *tp = tcp_sk(sk);
188
183 if (in_flight < tp->snd_cwnd) 189 if (in_flight < tp->snd_cwnd)
184 return; 190 return;
185 191
@@ -202,15 +208,17 @@ void tcp_reno_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, u32 in_flight,
202EXPORT_SYMBOL_GPL(tcp_reno_cong_avoid); 208EXPORT_SYMBOL_GPL(tcp_reno_cong_avoid);
203 209
204/* Slow start threshold is half the congestion window (min 2) */ 210/* Slow start threshold is half the congestion window (min 2) */
205u32 tcp_reno_ssthresh(struct tcp_sock *tp) 211u32 tcp_reno_ssthresh(struct sock *sk)
206{ 212{
213 const struct tcp_sock *tp = tcp_sk(sk);
207 return max(tp->snd_cwnd >> 1U, 2U); 214 return max(tp->snd_cwnd >> 1U, 2U);
208} 215}
209EXPORT_SYMBOL_GPL(tcp_reno_ssthresh); 216EXPORT_SYMBOL_GPL(tcp_reno_ssthresh);
210 217
211/* Lower bound on congestion window. */ 218/* Lower bound on congestion window. */
212u32 tcp_reno_min_cwnd(struct tcp_sock *tp) 219u32 tcp_reno_min_cwnd(struct sock *sk)
213{ 220{
221 const struct tcp_sock *tp = tcp_sk(sk);
214 return tp->snd_ssthresh/2; 222 return tp->snd_ssthresh/2;
215} 223}
216EXPORT_SYMBOL_GPL(tcp_reno_min_cwnd); 224EXPORT_SYMBOL_GPL(tcp_reno_min_cwnd);
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index 5f4c74f45e82..4288ecfec9a7 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -66,10 +66,10 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
66 if (ext & (1<<(TCPDIAG_INFO-1))) 66 if (ext & (1<<(TCPDIAG_INFO-1)))
67 info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info)); 67 info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));
68 68
69 if (ext & (1<<(TCPDIAG_CONG-1))) { 69 if ((ext & (1 << (TCPDIAG_CONG - 1))) && icsk->icsk_ca_ops) {
70 size_t len = strlen(tp->ca_ops->name); 70 size_t len = strlen(icsk->icsk_ca_ops->name);
71 strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1), 71 strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1),
72 tp->ca_ops->name); 72 icsk->icsk_ca_ops->name);
73 } 73 }
74 } 74 }
75 r->tcpdiag_family = sk->sk_family; 75 r->tcpdiag_family = sk->sk_family;
@@ -136,18 +136,17 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
136 r->tcpdiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); 136 r->tcpdiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
137 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { 137 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
138 r->tcpdiag_timer = 4; 138 r->tcpdiag_timer = 4;
139 r->tcpdiag_retrans = tp->probes_out; 139 r->tcpdiag_retrans = icsk->icsk_probes_out;
140 r->tcpdiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); 140 r->tcpdiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
141 } else if (timer_pending(&sk->sk_timer)) { 141 } else if (timer_pending(&sk->sk_timer)) {
142 r->tcpdiag_timer = 2; 142 r->tcpdiag_timer = 2;
143 r->tcpdiag_retrans = tp->probes_out; 143 r->tcpdiag_retrans = icsk->icsk_probes_out;
144 r->tcpdiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); 144 r->tcpdiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
145 } else { 145 } else {
146 r->tcpdiag_timer = 0; 146 r->tcpdiag_timer = 0;
147 r->tcpdiag_expires = 0; 147 r->tcpdiag_expires = 0;
148 } 148 }
149#undef EXPIRES_IN_MS 149#undef EXPIRES_IN_MS
150
151 r->tcpdiag_rqueue = tp->rcv_nxt - tp->copied_seq; 150 r->tcpdiag_rqueue = tp->rcv_nxt - tp->copied_seq;
152 r->tcpdiag_wqueue = tp->write_seq - tp->snd_una; 151 r->tcpdiag_wqueue = tp->write_seq - tp->snd_una;
153 r->tcpdiag_uid = sock_i_uid(sk); 152 r->tcpdiag_uid = sock_i_uid(sk);
@@ -163,8 +162,9 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
163 if (info) 162 if (info)
164 tcp_get_info(sk, info); 163 tcp_get_info(sk, info);
165 164
166 if (sk->sk_state < TCP_TIME_WAIT && tp->ca_ops->get_info) 165 if (sk->sk_state < TCP_TIME_WAIT &&
167 tp->ca_ops->get_info(tp, ext, skb); 166 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
167 icsk->icsk_ca_ops->get_info(sk, ext, skb);
168 168
169 nlh->nlmsg_len = skb->tail - b; 169 nlh->nlmsg_len = skb->tail - b;
170 return skb->len; 170 return skb->len;
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c
index 36c51f8136bf..6acc04bde080 100644
--- a/net/ipv4/tcp_highspeed.c
+++ b/net/ipv4/tcp_highspeed.c
@@ -98,9 +98,10 @@ struct hstcp {
98 u32 ai; 98 u32 ai;
99}; 99};
100 100
101static void hstcp_init(struct tcp_sock *tp) 101static void hstcp_init(struct sock *sk)
102{ 102{
103 struct hstcp *ca = tcp_ca(tp); 103 struct tcp_sock *tp = tcp_sk(sk);
104 struct hstcp *ca = inet_csk_ca(sk);
104 105
105 ca->ai = 0; 106 ca->ai = 0;
106 107
@@ -109,10 +110,11 @@ static void hstcp_init(struct tcp_sock *tp)
109 tp->snd_cwnd_clamp = min_t(u32, tp->snd_cwnd_clamp, 0xffffffff/128); 110 tp->snd_cwnd_clamp = min_t(u32, tp->snd_cwnd_clamp, 0xffffffff/128);
110} 111}
111 112
112static void hstcp_cong_avoid(struct tcp_sock *tp, u32 adk, u32 rtt, 113static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt,
113 u32 in_flight, int good) 114 u32 in_flight, int good)
114{ 115{
115 struct hstcp *ca = tcp_ca(tp); 116 struct tcp_sock *tp = tcp_sk(sk);
117 struct hstcp *ca = inet_csk_ca(sk);
116 118
117 if (in_flight < tp->snd_cwnd) 119 if (in_flight < tp->snd_cwnd)
118 return; 120 return;
@@ -143,9 +145,10 @@ static void hstcp_cong_avoid(struct tcp_sock *tp, u32 adk, u32 rtt,
143 } 145 }
144} 146}
145 147
146static u32 hstcp_ssthresh(struct tcp_sock *tp) 148static u32 hstcp_ssthresh(struct sock *sk)
147{ 149{
148 struct hstcp *ca = tcp_ca(tp); 150 const struct tcp_sock *tp = tcp_sk(sk);
151 const struct hstcp *ca = inet_csk_ca(sk);
149 152
150 /* Do multiplicative decrease */ 153 /* Do multiplicative decrease */
151 return max(tp->snd_cwnd - ((tp->snd_cwnd * hstcp_aimd_vals[ca->ai].md) >> 8), 2U); 154 return max(tp->snd_cwnd - ((tp->snd_cwnd * hstcp_aimd_vals[ca->ai].md) >> 8), 2U);
@@ -164,7 +167,7 @@ static struct tcp_congestion_ops tcp_highspeed = {
164 167
165static int __init hstcp_register(void) 168static int __init hstcp_register(void)
166{ 169{
167 BUG_ON(sizeof(struct hstcp) > TCP_CA_PRIV_SIZE); 170 BUG_ON(sizeof(struct hstcp) > ICSK_CA_PRIV_SIZE);
168 return tcp_register_congestion_control(&tcp_highspeed); 171 return tcp_register_congestion_control(&tcp_highspeed);
169} 172}
170 173
diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c
index 40168275acf9..e47b37984e95 100644
--- a/net/ipv4/tcp_htcp.c
+++ b/net/ipv4/tcp_htcp.c
@@ -55,18 +55,21 @@ static inline void htcp_reset(struct htcp *ca)
55 ca->snd_cwnd_cnt2 = 0; 55 ca->snd_cwnd_cnt2 = 0;
56} 56}
57 57
58static u32 htcp_cwnd_undo(struct tcp_sock *tp) 58static u32 htcp_cwnd_undo(struct sock *sk)
59{ 59{
60 struct htcp *ca = tcp_ca(tp); 60 const struct tcp_sock *tp = tcp_sk(sk);
61 struct htcp *ca = inet_csk_ca(sk);
61 ca->ccount = ca->undo_ccount; 62 ca->ccount = ca->undo_ccount;
62 ca->maxRTT = ca->undo_maxRTT; 63 ca->maxRTT = ca->undo_maxRTT;
63 ca->old_maxB = ca->undo_old_maxB; 64 ca->old_maxB = ca->undo_old_maxB;
64 return max(tp->snd_cwnd, (tp->snd_ssthresh<<7)/ca->beta); 65 return max(tp->snd_cwnd, (tp->snd_ssthresh<<7)/ca->beta);
65} 66}
66 67
67static inline void measure_rtt(struct tcp_sock *tp) 68static inline void measure_rtt(struct sock *sk)
68{ 69{
69 struct htcp *ca = tcp_ca(tp); 70 const struct inet_connection_sock *icsk = inet_csk(sk);
71 const struct tcp_sock *tp = tcp_sk(sk);
72 struct htcp *ca = inet_csk_ca(sk);
70 u32 srtt = tp->srtt>>3; 73 u32 srtt = tp->srtt>>3;
71 74
72 /* keep track of minimum RTT seen so far, minRTT is zero at first */ 75 /* keep track of minimum RTT seen so far, minRTT is zero at first */
@@ -74,7 +77,7 @@ static inline void measure_rtt(struct tcp_sock *tp)
74 ca->minRTT = srtt; 77 ca->minRTT = srtt;
75 78
76 /* max RTT */ 79 /* max RTT */
77 if (tp->ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) { 80 if (icsk->icsk_ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) {
78 if (ca->maxRTT < ca->minRTT) 81 if (ca->maxRTT < ca->minRTT)
79 ca->maxRTT = ca->minRTT; 82 ca->maxRTT = ca->minRTT;
80 if (ca->maxRTT < srtt && srtt <= ca->maxRTT+HZ/50) 83 if (ca->maxRTT < srtt && srtt <= ca->maxRTT+HZ/50)
@@ -82,13 +85,16 @@ static inline void measure_rtt(struct tcp_sock *tp)
82 } 85 }
83} 86}
84 87
85static void measure_achieved_throughput(struct tcp_sock *tp, u32 pkts_acked) 88static void measure_achieved_throughput(struct sock *sk, u32 pkts_acked)
86{ 89{
87 struct htcp *ca = tcp_ca(tp); 90 const struct inet_connection_sock *icsk = inet_csk(sk);
91 const struct tcp_sock *tp = tcp_sk(sk);
92 struct htcp *ca = inet_csk_ca(sk);
88 u32 now = tcp_time_stamp; 93 u32 now = tcp_time_stamp;
89 94
90 /* achieved throughput calculations */ 95 /* achieved throughput calculations */
91 if (tp->ca_state != TCP_CA_Open && tp->ca_state != TCP_CA_Disorder) { 96 if (icsk->icsk_ca_state != TCP_CA_Open &&
97 icsk->icsk_ca_state != TCP_CA_Disorder) {
92 ca->packetcount = 0; 98 ca->packetcount = 0;
93 ca->lasttime = now; 99 ca->lasttime = now;
94 return; 100 return;
@@ -173,9 +179,9 @@ static inline void htcp_alpha_update(struct htcp *ca)
173 * that point do we really have a real sense of maxRTT (the queues en route 179 * that point do we really have a real sense of maxRTT (the queues en route
174 * were getting just too full now). 180 * were getting just too full now).
175 */ 181 */
176static void htcp_param_update(struct tcp_sock *tp) 182static void htcp_param_update(struct sock *sk)
177{ 183{
178 struct htcp *ca = tcp_ca(tp); 184 struct htcp *ca = inet_csk_ca(sk);
179 u32 minRTT = ca->minRTT; 185 u32 minRTT = ca->minRTT;
180 u32 maxRTT = ca->maxRTT; 186 u32 maxRTT = ca->maxRTT;
181 187
@@ -187,17 +193,19 @@ static void htcp_param_update(struct tcp_sock *tp)
187 ca->maxRTT = minRTT + ((maxRTT-minRTT)*95)/100; 193 ca->maxRTT = minRTT + ((maxRTT-minRTT)*95)/100;
188} 194}
189 195
190static u32 htcp_recalc_ssthresh(struct tcp_sock *tp) 196static u32 htcp_recalc_ssthresh(struct sock *sk)
191{ 197{
192 struct htcp *ca = tcp_ca(tp); 198 const struct tcp_sock *tp = tcp_sk(sk);
193 htcp_param_update(tp); 199 const struct htcp *ca = inet_csk_ca(sk);
200 htcp_param_update(sk);
194 return max((tp->snd_cwnd * ca->beta) >> 7, 2U); 201 return max((tp->snd_cwnd * ca->beta) >> 7, 2U);
195} 202}
196 203
197static void htcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, 204static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
198 u32 in_flight, int data_acked) 205 u32 in_flight, int data_acked)
199{ 206{
200 struct htcp *ca = tcp_ca(tp); 207 struct tcp_sock *tp = tcp_sk(sk);
208 struct htcp *ca = inet_csk_ca(sk);
201 209
202 if (in_flight < tp->snd_cwnd) 210 if (in_flight < tp->snd_cwnd)
203 return; 211 return;
@@ -207,7 +215,7 @@ static void htcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
207 if (tp->snd_cwnd < tp->snd_cwnd_clamp) 215 if (tp->snd_cwnd < tp->snd_cwnd_clamp)
208 tp->snd_cwnd++; 216 tp->snd_cwnd++;
209 } else { 217 } else {
210 measure_rtt(tp); 218 measure_rtt(sk);
211 219
212 /* keep track of number of round-trip times since last backoff event */ 220 /* keep track of number of round-trip times since last backoff event */
213 if (ca->snd_cwnd_cnt2++ > tp->snd_cwnd) { 221 if (ca->snd_cwnd_cnt2++ > tp->snd_cwnd) {
@@ -229,28 +237,29 @@ static void htcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
229} 237}
230 238
231/* Lower bound on congestion window. */ 239/* Lower bound on congestion window. */
232static u32 htcp_min_cwnd(struct tcp_sock *tp) 240static u32 htcp_min_cwnd(struct sock *sk)
233{ 241{
242 const struct tcp_sock *tp = tcp_sk(sk);
234 return tp->snd_ssthresh; 243 return tp->snd_ssthresh;
235} 244}
236 245
237 246
238static void htcp_init(struct tcp_sock *tp) 247static void htcp_init(struct sock *sk)
239{ 248{
240 struct htcp *ca = tcp_ca(tp); 249 struct htcp *ca = inet_csk_ca(sk);
241 250
242 memset(ca, 0, sizeof(struct htcp)); 251 memset(ca, 0, sizeof(struct htcp));
243 ca->alpha = ALPHA_BASE; 252 ca->alpha = ALPHA_BASE;
244 ca->beta = BETA_MIN; 253 ca->beta = BETA_MIN;
245} 254}
246 255
247static void htcp_state(struct tcp_sock *tp, u8 new_state) 256static void htcp_state(struct sock *sk, u8 new_state)
248{ 257{
249 switch (new_state) { 258 switch (new_state) {
250 case TCP_CA_CWR: 259 case TCP_CA_CWR:
251 case TCP_CA_Recovery: 260 case TCP_CA_Recovery:
252 case TCP_CA_Loss: 261 case TCP_CA_Loss:
253 htcp_reset(tcp_ca(tp)); 262 htcp_reset(inet_csk_ca(sk));
254 break; 263 break;
255 } 264 }
256} 265}
@@ -269,7 +278,7 @@ static struct tcp_congestion_ops htcp = {
269 278
270static int __init htcp_register(void) 279static int __init htcp_register(void)
271{ 280{
272 BUG_ON(sizeof(struct htcp) > TCP_CA_PRIV_SIZE); 281 BUG_ON(sizeof(struct htcp) > ICSK_CA_PRIV_SIZE);
273 BUILD_BUG_ON(BETA_MIN >= BETA_MAX); 282 BUILD_BUG_ON(BETA_MIN >= BETA_MAX);
274 if (!use_bandwidth_switch) 283 if (!use_bandwidth_switch)
275 htcp.pkts_acked = NULL; 284 htcp.pkts_acked = NULL;
diff --git a/net/ipv4/tcp_hybla.c b/net/ipv4/tcp_hybla.c
index 13a66342c304..77add63623df 100644
--- a/net/ipv4/tcp_hybla.c
+++ b/net/ipv4/tcp_hybla.c
@@ -33,19 +33,20 @@ MODULE_PARM_DESC(rtt0, "reference rout trip time (ms)");
33 33
34 34
35/* This is called to refresh values for hybla parameters */ 35/* This is called to refresh values for hybla parameters */
36static inline void hybla_recalc_param (struct tcp_sock *tp) 36static inline void hybla_recalc_param (struct sock *sk)
37{ 37{
38 struct hybla *ca = tcp_ca(tp); 38 struct hybla *ca = inet_csk_ca(sk);
39 39
40 ca->rho_3ls = max_t(u32, tp->srtt / msecs_to_jiffies(rtt0), 8); 40 ca->rho_3ls = max_t(u32, tcp_sk(sk)->srtt / msecs_to_jiffies(rtt0), 8);
41 ca->rho = ca->rho_3ls >> 3; 41 ca->rho = ca->rho_3ls >> 3;
42 ca->rho2_7ls = (ca->rho_3ls * ca->rho_3ls) << 1; 42 ca->rho2_7ls = (ca->rho_3ls * ca->rho_3ls) << 1;
43 ca->rho2 = ca->rho2_7ls >>7; 43 ca->rho2 = ca->rho2_7ls >>7;
44} 44}
45 45
46static void hybla_init(struct tcp_sock *tp) 46static void hybla_init(struct sock *sk)
47{ 47{
48 struct hybla *ca = tcp_ca(tp); 48 struct tcp_sock *tp = tcp_sk(sk);
49 struct hybla *ca = inet_csk_ca(sk);
49 50
50 ca->rho = 0; 51 ca->rho = 0;
51 ca->rho2 = 0; 52 ca->rho2 = 0;
@@ -57,17 +58,16 @@ static void hybla_init(struct tcp_sock *tp)
57 tp->snd_cwnd_clamp = 65535; 58 tp->snd_cwnd_clamp = 65535;
58 59
59 /* 1st Rho measurement based on initial srtt */ 60 /* 1st Rho measurement based on initial srtt */
60 hybla_recalc_param(tp); 61 hybla_recalc_param(sk);
61 62
62 /* set minimum rtt as this is the 1st ever seen */ 63 /* set minimum rtt as this is the 1st ever seen */
63 ca->minrtt = tp->srtt; 64 ca->minrtt = tp->srtt;
64 tp->snd_cwnd = ca->rho; 65 tp->snd_cwnd = ca->rho;
65} 66}
66 67
67static void hybla_state(struct tcp_sock *tp, u8 ca_state) 68static void hybla_state(struct sock *sk, u8 ca_state)
68{ 69{
69 struct hybla *ca = tcp_ca(tp); 70 struct hybla *ca = inet_csk_ca(sk);
70
71 ca->hybla_en = (ca_state == TCP_CA_Open); 71 ca->hybla_en = (ca_state == TCP_CA_Open);
72} 72}
73 73
@@ -86,27 +86,28 @@ static inline u32 hybla_fraction(u32 odds)
86 * o Give cwnd a new value based on the model proposed 86 * o Give cwnd a new value based on the model proposed
87 * o remember increments <1 87 * o remember increments <1
88 */ 88 */
89static void hybla_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, 89static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
90 u32 in_flight, int flag) 90 u32 in_flight, int flag)
91{ 91{
92 struct hybla *ca = tcp_ca(tp); 92 struct tcp_sock *tp = tcp_sk(sk);
93 struct hybla *ca = inet_csk_ca(sk);
93 u32 increment, odd, rho_fractions; 94 u32 increment, odd, rho_fractions;
94 int is_slowstart = 0; 95 int is_slowstart = 0;
95 96
96 /* Recalculate rho only if this srtt is the lowest */ 97 /* Recalculate rho only if this srtt is the lowest */
97 if (tp->srtt < ca->minrtt){ 98 if (tp->srtt < ca->minrtt){
98 hybla_recalc_param(tp); 99 hybla_recalc_param(sk);
99 ca->minrtt = tp->srtt; 100 ca->minrtt = tp->srtt;
100 } 101 }
101 102
102 if (!ca->hybla_en) 103 if (!ca->hybla_en)
103 return tcp_reno_cong_avoid(tp, ack, rtt, in_flight, flag); 104 return tcp_reno_cong_avoid(sk, ack, rtt, in_flight, flag);
104 105
105 if (in_flight < tp->snd_cwnd) 106 if (in_flight < tp->snd_cwnd)
106 return; 107 return;
107 108
108 if (ca->rho == 0) 109 if (ca->rho == 0)
109 hybla_recalc_param(tp); 110 hybla_recalc_param(sk);
110 111
111 rho_fractions = ca->rho_3ls - (ca->rho << 3); 112 rho_fractions = ca->rho_3ls - (ca->rho << 3);
112 113
@@ -170,7 +171,7 @@ static struct tcp_congestion_ops tcp_hybla = {
170 171
171static int __init hybla_register(void) 172static int __init hybla_register(void)
172{ 173{
173 BUG_ON(sizeof(struct hybla) > TCP_CA_PRIV_SIZE); 174 BUG_ON(sizeof(struct hybla) > ICSK_CA_PRIV_SIZE);
174 return tcp_register_congestion_control(&tcp_hybla); 175 return tcp_register_congestion_control(&tcp_hybla);
175} 176}
176 177
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 71d456148de7..fdd9547fb783 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -325,11 +325,12 @@ static void tcp_init_buffer_space(struct sock *sk)
325/* 5. Recalculate window clamp after socket hit its memory bounds. */ 325/* 5. Recalculate window clamp after socket hit its memory bounds. */
326static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp) 326static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp)
327{ 327{
328 struct inet_connection_sock *icsk = inet_csk(sk);
328 struct sk_buff *skb; 329 struct sk_buff *skb;
329 unsigned int app_win = tp->rcv_nxt - tp->copied_seq; 330 unsigned int app_win = tp->rcv_nxt - tp->copied_seq;
330 int ofo_win = 0; 331 int ofo_win = 0;
331 332
332 inet_csk(sk)->icsk_ack.quick = 0; 333 icsk->icsk_ack.quick = 0;
333 334
334 skb_queue_walk(&tp->out_of_order_queue, skb) { 335 skb_queue_walk(&tp->out_of_order_queue, skb) {
335 ofo_win += skb->len; 336 ofo_win += skb->len;
@@ -350,8 +351,8 @@ static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp)
350 app_win += ofo_win; 351 app_win += ofo_win;
351 if (atomic_read(&sk->sk_rmem_alloc) >= 2 * sk->sk_rcvbuf) 352 if (atomic_read(&sk->sk_rmem_alloc) >= 2 * sk->sk_rcvbuf)
352 app_win >>= 1; 353 app_win >>= 1;
353 if (app_win > inet_csk(sk)->icsk_ack.rcv_mss) 354 if (app_win > icsk->icsk_ack.rcv_mss)
354 app_win -= inet_csk(sk)->icsk_ack.rcv_mss; 355 app_win -= icsk->icsk_ack.rcv_mss;
355 app_win = max(app_win, 2U*tp->advmss); 356 app_win = max(app_win, 2U*tp->advmss);
356 357
357 if (!ofo_win) 358 if (!ofo_win)
@@ -549,8 +550,10 @@ static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_
549 * To save cycles in the RFC 1323 implementation it was better to break 550 * To save cycles in the RFC 1323 implementation it was better to break
550 * it up into three procedures. -- erics 551 * it up into three procedures. -- erics
551 */ 552 */
552static void tcp_rtt_estimator(struct tcp_sock *tp, __u32 mrtt, u32 *usrtt) 553static void tcp_rtt_estimator(struct sock *sk, const __u32 mrtt, u32 *usrtt)
553{ 554{
555 struct tcp_sock *tp = tcp_sk(sk);
556 const struct inet_connection_sock *icsk = inet_csk(sk);
554 long m = mrtt; /* RTT */ 557 long m = mrtt; /* RTT */
555 558
556 /* The following amusing code comes from Jacobson's 559 /* The following amusing code comes from Jacobson's
@@ -610,8 +613,8 @@ static void tcp_rtt_estimator(struct tcp_sock *tp, __u32 mrtt, u32 *usrtt)
610 tp->rtt_seq = tp->snd_nxt; 613 tp->rtt_seq = tp->snd_nxt;
611 } 614 }
612 615
613 if (tp->ca_ops->rtt_sample) 616 if (icsk->icsk_ca_ops->rtt_sample)
614 tp->ca_ops->rtt_sample(tp, *usrtt); 617 icsk->icsk_ca_ops->rtt_sample(sk, *usrtt);
615} 618}
616 619
617/* Calculate rto without backoff. This is the second half of Van Jacobson's 620/* Calculate rto without backoff. This is the second half of Van Jacobson's
@@ -663,9 +666,10 @@ void tcp_update_metrics(struct sock *sk)
663 dst_confirm(dst); 666 dst_confirm(dst);
664 667
665 if (dst && (dst->flags&DST_HOST)) { 668 if (dst && (dst->flags&DST_HOST)) {
669 const struct inet_connection_sock *icsk = inet_csk(sk);
666 int m; 670 int m;
667 671
668 if (inet_csk(sk)->icsk_backoff || !tp->srtt) { 672 if (icsk->icsk_backoff || !tp->srtt) {
669 /* This session failed to estimate rtt. Why? 673 /* This session failed to estimate rtt. Why?
670 * Probably, no packets returned in time. 674 * Probably, no packets returned in time.
671 * Reset our results. 675 * Reset our results.
@@ -714,7 +718,7 @@ void tcp_update_metrics(struct sock *sk)
714 tp->snd_cwnd > dst_metric(dst, RTAX_CWND)) 718 tp->snd_cwnd > dst_metric(dst, RTAX_CWND))
715 dst->metrics[RTAX_CWND-1] = tp->snd_cwnd; 719 dst->metrics[RTAX_CWND-1] = tp->snd_cwnd;
716 } else if (tp->snd_cwnd > tp->snd_ssthresh && 720 } else if (tp->snd_cwnd > tp->snd_ssthresh &&
717 tp->ca_state == TCP_CA_Open) { 721 icsk->icsk_ca_state == TCP_CA_Open) {
718 /* Cong. avoidance phase, cwnd is reliable. */ 722 /* Cong. avoidance phase, cwnd is reliable. */
719 if (!dst_metric_locked(dst, RTAX_SSTHRESH)) 723 if (!dst_metric_locked(dst, RTAX_SSTHRESH))
720 dst->metrics[RTAX_SSTHRESH-1] = 724 dst->metrics[RTAX_SSTHRESH-1] =
@@ -828,8 +832,10 @@ reset:
828 } 832 }
829} 833}
830 834
831static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts) 835static void tcp_update_reordering(struct sock *sk, const int metric,
836 const int ts)
832{ 837{
838 struct tcp_sock *tp = tcp_sk(sk);
833 if (metric > tp->reordering) { 839 if (metric > tp->reordering) {
834 tp->reordering = min(TCP_MAX_REORDERING, metric); 840 tp->reordering = min(TCP_MAX_REORDERING, metric);
835 841
@@ -844,7 +850,7 @@ static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts)
844 NET_INC_STATS_BH(LINUX_MIB_TCPSACKREORDER); 850 NET_INC_STATS_BH(LINUX_MIB_TCPSACKREORDER);
845#if FASTRETRANS_DEBUG > 1 851#if FASTRETRANS_DEBUG > 1
846 printk(KERN_DEBUG "Disorder%d %d %u f%u s%u rr%d\n", 852 printk(KERN_DEBUG "Disorder%d %d %u f%u s%u rr%d\n",
847 tp->rx_opt.sack_ok, tp->ca_state, 853 tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state,
848 tp->reordering, 854 tp->reordering,
849 tp->fackets_out, 855 tp->fackets_out,
850 tp->sacked_out, 856 tp->sacked_out,
@@ -906,6 +912,7 @@ static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts)
906static int 912static int
907tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_una) 913tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_una)
908{ 914{
915 const struct inet_connection_sock *icsk = inet_csk(sk);
909 struct tcp_sock *tp = tcp_sk(sk); 916 struct tcp_sock *tp = tcp_sk(sk);
910 unsigned char *ptr = ack_skb->h.raw + TCP_SKB_CB(ack_skb)->sacked; 917 unsigned char *ptr = ack_skb->h.raw + TCP_SKB_CB(ack_skb)->sacked;
911 struct tcp_sack_block *sp = (struct tcp_sack_block *)(ptr+2); 918 struct tcp_sack_block *sp = (struct tcp_sack_block *)(ptr+2);
@@ -1071,7 +1078,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
1071 * we have to account for reordering! Ugly, 1078 * we have to account for reordering! Ugly,
1072 * but should help. 1079 * but should help.
1073 */ 1080 */
1074 if (lost_retrans && tp->ca_state == TCP_CA_Recovery) { 1081 if (lost_retrans && icsk->icsk_ca_state == TCP_CA_Recovery) {
1075 struct sk_buff *skb; 1082 struct sk_buff *skb;
1076 1083
1077 sk_stream_for_retrans_queue(skb, sk) { 1084 sk_stream_for_retrans_queue(skb, sk) {
@@ -1100,8 +1107,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
1100 1107
1101 tp->left_out = tp->sacked_out + tp->lost_out; 1108 tp->left_out = tp->sacked_out + tp->lost_out;
1102 1109
1103 if ((reord < tp->fackets_out) && tp->ca_state != TCP_CA_Loss) 1110 if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss)
1104 tcp_update_reordering(tp, ((tp->fackets_out + 1) - reord), 0); 1111 tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
1105 1112
1106#if FASTRETRANS_DEBUG > 0 1113#if FASTRETRANS_DEBUG > 0
1107 BUG_TRAP((int)tp->sacked_out >= 0); 1114 BUG_TRAP((int)tp->sacked_out >= 0);
@@ -1118,17 +1125,18 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
1118 */ 1125 */
1119void tcp_enter_frto(struct sock *sk) 1126void tcp_enter_frto(struct sock *sk)
1120{ 1127{
1128 const struct inet_connection_sock *icsk = inet_csk(sk);
1121 struct tcp_sock *tp = tcp_sk(sk); 1129 struct tcp_sock *tp = tcp_sk(sk);
1122 struct sk_buff *skb; 1130 struct sk_buff *skb;
1123 1131
1124 tp->frto_counter = 1; 1132 tp->frto_counter = 1;
1125 1133
1126 if (tp->ca_state <= TCP_CA_Disorder || 1134 if (icsk->icsk_ca_state <= TCP_CA_Disorder ||
1127 tp->snd_una == tp->high_seq || 1135 tp->snd_una == tp->high_seq ||
1128 (tp->ca_state == TCP_CA_Loss && !inet_csk(sk)->icsk_retransmits)) { 1136 (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) {
1129 tp->prior_ssthresh = tcp_current_ssthresh(tp); 1137 tp->prior_ssthresh = tcp_current_ssthresh(sk);
1130 tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); 1138 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
1131 tcp_ca_event(tp, CA_EVENT_FRTO); 1139 tcp_ca_event(sk, CA_EVENT_FRTO);
1132 } 1140 }
1133 1141
1134 /* Have to clear retransmission markers here to keep the bookkeeping 1142 /* Have to clear retransmission markers here to keep the bookkeeping
@@ -1145,7 +1153,7 @@ void tcp_enter_frto(struct sock *sk)
1145 } 1153 }
1146 tcp_sync_left_out(tp); 1154 tcp_sync_left_out(tp);
1147 1155
1148 tcp_set_ca_state(tp, TCP_CA_Open); 1156 tcp_set_ca_state(sk, TCP_CA_Open);
1149 tp->frto_highmark = tp->snd_nxt; 1157 tp->frto_highmark = tp->snd_nxt;
1150} 1158}
1151 1159
@@ -1191,7 +1199,7 @@ static void tcp_enter_frto_loss(struct sock *sk)
1191 1199
1192 tp->reordering = min_t(unsigned int, tp->reordering, 1200 tp->reordering = min_t(unsigned int, tp->reordering,
1193 sysctl_tcp_reordering); 1201 sysctl_tcp_reordering);
1194 tcp_set_ca_state(tp, TCP_CA_Loss); 1202 tcp_set_ca_state(sk, TCP_CA_Loss);
1195 tp->high_seq = tp->frto_highmark; 1203 tp->high_seq = tp->frto_highmark;
1196 TCP_ECN_queue_cwr(tp); 1204 TCP_ECN_queue_cwr(tp);
1197} 1205}
@@ -1215,16 +1223,17 @@ void tcp_clear_retrans(struct tcp_sock *tp)
1215 */ 1223 */
1216void tcp_enter_loss(struct sock *sk, int how) 1224void tcp_enter_loss(struct sock *sk, int how)
1217{ 1225{
1226 const struct inet_connection_sock *icsk = inet_csk(sk);
1218 struct tcp_sock *tp = tcp_sk(sk); 1227 struct tcp_sock *tp = tcp_sk(sk);
1219 struct sk_buff *skb; 1228 struct sk_buff *skb;
1220 int cnt = 0; 1229 int cnt = 0;
1221 1230
1222 /* Reduce ssthresh if it has not yet been made inside this window. */ 1231 /* Reduce ssthresh if it has not yet been made inside this window. */
1223 if (tp->ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq || 1232 if (icsk->icsk_ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq ||
1224 (tp->ca_state == TCP_CA_Loss && !inet_csk(sk)->icsk_retransmits)) { 1233 (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) {
1225 tp->prior_ssthresh = tcp_current_ssthresh(tp); 1234 tp->prior_ssthresh = tcp_current_ssthresh(sk);
1226 tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); 1235 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
1227 tcp_ca_event(tp, CA_EVENT_LOSS); 1236 tcp_ca_event(sk, CA_EVENT_LOSS);
1228 } 1237 }
1229 tp->snd_cwnd = 1; 1238 tp->snd_cwnd = 1;
1230 tp->snd_cwnd_cnt = 0; 1239 tp->snd_cwnd_cnt = 0;
@@ -1255,7 +1264,7 @@ void tcp_enter_loss(struct sock *sk, int how)
1255 1264
1256 tp->reordering = min_t(unsigned int, tp->reordering, 1265 tp->reordering = min_t(unsigned int, tp->reordering,
1257 sysctl_tcp_reordering); 1266 sysctl_tcp_reordering);
1258 tcp_set_ca_state(tp, TCP_CA_Loss); 1267 tcp_set_ca_state(sk, TCP_CA_Loss);
1259 tp->high_seq = tp->snd_nxt; 1268 tp->high_seq = tp->snd_nxt;
1260 TCP_ECN_queue_cwr(tp); 1269 TCP_ECN_queue_cwr(tp);
1261} 1270}
@@ -1272,13 +1281,14 @@ static int tcp_check_sack_reneging(struct sock *sk)
1272 */ 1281 */
1273 if ((skb = skb_peek(&sk->sk_write_queue)) != NULL && 1282 if ((skb = skb_peek(&sk->sk_write_queue)) != NULL &&
1274 (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)) { 1283 (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)) {
1284 struct inet_connection_sock *icsk = inet_csk(sk);
1275 NET_INC_STATS_BH(LINUX_MIB_TCPSACKRENEGING); 1285 NET_INC_STATS_BH(LINUX_MIB_TCPSACKRENEGING);
1276 1286
1277 tcp_enter_loss(sk, 1); 1287 tcp_enter_loss(sk, 1);
1278 inet_csk(sk)->icsk_retransmits++; 1288 icsk->icsk_retransmits++;
1279 tcp_retransmit_skb(sk, skb_peek(&sk->sk_write_queue)); 1289 tcp_retransmit_skb(sk, skb_peek(&sk->sk_write_queue));
1280 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, 1290 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
1281 inet_csk(sk)->icsk_rto, TCP_RTO_MAX); 1291 icsk->icsk_rto, TCP_RTO_MAX);
1282 return 1; 1292 return 1;
1283 } 1293 }
1284 return 0; 1294 return 0;
@@ -1431,8 +1441,9 @@ static int tcp_time_to_recover(struct sock *sk, struct tcp_sock *tp)
1431 * in assumption of absent reordering, interpret this as reordering. 1441 * in assumption of absent reordering, interpret this as reordering.
1432 * The only another reason could be bug in receiver TCP. 1442 * The only another reason could be bug in receiver TCP.
1433 */ 1443 */
1434static void tcp_check_reno_reordering(struct tcp_sock *tp, int addend) 1444static void tcp_check_reno_reordering(struct sock *sk, const int addend)
1435{ 1445{
1446 struct tcp_sock *tp = tcp_sk(sk);
1436 u32 holes; 1447 u32 holes;
1437 1448
1438 holes = max(tp->lost_out, 1U); 1449 holes = max(tp->lost_out, 1U);
@@ -1440,16 +1451,17 @@ static void tcp_check_reno_reordering(struct tcp_sock *tp, int addend)
1440 1451
1441 if ((tp->sacked_out + holes) > tp->packets_out) { 1452 if ((tp->sacked_out + holes) > tp->packets_out) {
1442 tp->sacked_out = tp->packets_out - holes; 1453 tp->sacked_out = tp->packets_out - holes;
1443 tcp_update_reordering(tp, tp->packets_out+addend, 0); 1454 tcp_update_reordering(sk, tp->packets_out + addend, 0);
1444 } 1455 }
1445} 1456}
1446 1457
1447/* Emulate SACKs for SACKless connection: account for a new dupack. */ 1458/* Emulate SACKs for SACKless connection: account for a new dupack. */
1448 1459
1449static void tcp_add_reno_sack(struct tcp_sock *tp) 1460static void tcp_add_reno_sack(struct sock *sk)
1450{ 1461{
1462 struct tcp_sock *tp = tcp_sk(sk);
1451 tp->sacked_out++; 1463 tp->sacked_out++;
1452 tcp_check_reno_reordering(tp, 0); 1464 tcp_check_reno_reordering(sk, 0);
1453 tcp_sync_left_out(tp); 1465 tcp_sync_left_out(tp);
1454} 1466}
1455 1467
@@ -1464,7 +1476,7 @@ static void tcp_remove_reno_sacks(struct sock *sk, struct tcp_sock *tp, int acke
1464 else 1476 else
1465 tp->sacked_out -= acked-1; 1477 tp->sacked_out -= acked-1;
1466 } 1478 }
1467 tcp_check_reno_reordering(tp, acked); 1479 tcp_check_reno_reordering(sk, acked);
1468 tcp_sync_left_out(tp); 1480 tcp_sync_left_out(tp);
1469} 1481}
1470 1482
@@ -1538,14 +1550,16 @@ static inline void tcp_moderate_cwnd(struct tcp_sock *tp)
1538} 1550}
1539 1551
1540/* Decrease cwnd each second ack. */ 1552/* Decrease cwnd each second ack. */
1541static void tcp_cwnd_down(struct tcp_sock *tp) 1553static void tcp_cwnd_down(struct sock *sk)
1542{ 1554{
1555 const struct inet_connection_sock *icsk = inet_csk(sk);
1556 struct tcp_sock *tp = tcp_sk(sk);
1543 int decr = tp->snd_cwnd_cnt + 1; 1557 int decr = tp->snd_cwnd_cnt + 1;
1544 1558
1545 tp->snd_cwnd_cnt = decr&1; 1559 tp->snd_cwnd_cnt = decr&1;
1546 decr >>= 1; 1560 decr >>= 1;
1547 1561
1548 if (decr && tp->snd_cwnd > tp->ca_ops->min_cwnd(tp)) 1562 if (decr && tp->snd_cwnd > icsk->icsk_ca_ops->min_cwnd(sk))
1549 tp->snd_cwnd -= decr; 1563 tp->snd_cwnd -= decr;
1550 1564
1551 tp->snd_cwnd = min(tp->snd_cwnd, tcp_packets_in_flight(tp)+1); 1565 tp->snd_cwnd = min(tp->snd_cwnd, tcp_packets_in_flight(tp)+1);
@@ -1579,11 +1593,15 @@ static void DBGUNDO(struct sock *sk, struct tcp_sock *tp, const char *msg)
1579#define DBGUNDO(x...) do { } while (0) 1593#define DBGUNDO(x...) do { } while (0)
1580#endif 1594#endif
1581 1595
1582static void tcp_undo_cwr(struct tcp_sock *tp, int undo) 1596static void tcp_undo_cwr(struct sock *sk, const int undo)
1583{ 1597{
1598 struct tcp_sock *tp = tcp_sk(sk);
1599
1584 if (tp->prior_ssthresh) { 1600 if (tp->prior_ssthresh) {
1585 if (tp->ca_ops->undo_cwnd) 1601 const struct inet_connection_sock *icsk = inet_csk(sk);
1586 tp->snd_cwnd = tp->ca_ops->undo_cwnd(tp); 1602
1603 if (icsk->icsk_ca_ops->undo_cwnd)
1604 tp->snd_cwnd = icsk->icsk_ca_ops->undo_cwnd(sk);
1587 else 1605 else
1588 tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh<<1); 1606 tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh<<1);
1589 1607
@@ -1611,9 +1629,9 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp)
1611 /* Happy end! We did not retransmit anything 1629 /* Happy end! We did not retransmit anything
1612 * or our original transmission succeeded. 1630 * or our original transmission succeeded.
1613 */ 1631 */
1614 DBGUNDO(sk, tp, tp->ca_state == TCP_CA_Loss ? "loss" : "retrans"); 1632 DBGUNDO(sk, tp, inet_csk(sk)->icsk_ca_state == TCP_CA_Loss ? "loss" : "retrans");
1615 tcp_undo_cwr(tp, 1); 1633 tcp_undo_cwr(sk, 1);
1616 if (tp->ca_state == TCP_CA_Loss) 1634 if (inet_csk(sk)->icsk_ca_state == TCP_CA_Loss)
1617 NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO); 1635 NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO);
1618 else 1636 else
1619 NET_INC_STATS_BH(LINUX_MIB_TCPFULLUNDO); 1637 NET_INC_STATS_BH(LINUX_MIB_TCPFULLUNDO);
@@ -1626,7 +1644,7 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp)
1626 tcp_moderate_cwnd(tp); 1644 tcp_moderate_cwnd(tp);
1627 return 1; 1645 return 1;
1628 } 1646 }
1629 tcp_set_ca_state(tp, TCP_CA_Open); 1647 tcp_set_ca_state(sk, TCP_CA_Open);
1630 return 0; 1648 return 0;
1631} 1649}
1632 1650
@@ -1635,7 +1653,7 @@ static void tcp_try_undo_dsack(struct sock *sk, struct tcp_sock *tp)
1635{ 1653{
1636 if (tp->undo_marker && !tp->undo_retrans) { 1654 if (tp->undo_marker && !tp->undo_retrans) {
1637 DBGUNDO(sk, tp, "D-SACK"); 1655 DBGUNDO(sk, tp, "D-SACK");
1638 tcp_undo_cwr(tp, 1); 1656 tcp_undo_cwr(sk, 1);
1639 tp->undo_marker = 0; 1657 tp->undo_marker = 0;
1640 NET_INC_STATS_BH(LINUX_MIB_TCPDSACKUNDO); 1658 NET_INC_STATS_BH(LINUX_MIB_TCPDSACKUNDO);
1641 } 1659 }
@@ -1656,10 +1674,10 @@ static int tcp_try_undo_partial(struct sock *sk, struct tcp_sock *tp,
1656 if (tp->retrans_out == 0) 1674 if (tp->retrans_out == 0)
1657 tp->retrans_stamp = 0; 1675 tp->retrans_stamp = 0;
1658 1676
1659 tcp_update_reordering(tp, tcp_fackets_out(tp)+acked, 1); 1677 tcp_update_reordering(sk, tcp_fackets_out(tp) + acked, 1);
1660 1678
1661 DBGUNDO(sk, tp, "Hoe"); 1679 DBGUNDO(sk, tp, "Hoe");
1662 tcp_undo_cwr(tp, 0); 1680 tcp_undo_cwr(sk, 0);
1663 NET_INC_STATS_BH(LINUX_MIB_TCPPARTIALUNDO); 1681 NET_INC_STATS_BH(LINUX_MIB_TCPPARTIALUNDO);
1664 1682
1665 /* So... Do not make Hoe's retransmit yet. 1683 /* So... Do not make Hoe's retransmit yet.
@@ -1682,22 +1700,23 @@ static int tcp_try_undo_loss(struct sock *sk, struct tcp_sock *tp)
1682 DBGUNDO(sk, tp, "partial loss"); 1700 DBGUNDO(sk, tp, "partial loss");
1683 tp->lost_out = 0; 1701 tp->lost_out = 0;
1684 tp->left_out = tp->sacked_out; 1702 tp->left_out = tp->sacked_out;
1685 tcp_undo_cwr(tp, 1); 1703 tcp_undo_cwr(sk, 1);
1686 NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO); 1704 NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO);
1687 inet_csk(sk)->icsk_retransmits = 0; 1705 inet_csk(sk)->icsk_retransmits = 0;
1688 tp->undo_marker = 0; 1706 tp->undo_marker = 0;
1689 if (!IsReno(tp)) 1707 if (!IsReno(tp))
1690 tcp_set_ca_state(tp, TCP_CA_Open); 1708 tcp_set_ca_state(sk, TCP_CA_Open);
1691 return 1; 1709 return 1;
1692 } 1710 }
1693 return 0; 1711 return 0;
1694} 1712}
1695 1713
1696static inline void tcp_complete_cwr(struct tcp_sock *tp) 1714static inline void tcp_complete_cwr(struct sock *sk)
1697{ 1715{
1716 struct tcp_sock *tp = tcp_sk(sk);
1698 tp->snd_cwnd = min(tp->snd_cwnd, tp->snd_ssthresh); 1717 tp->snd_cwnd = min(tp->snd_cwnd, tp->snd_ssthresh);
1699 tp->snd_cwnd_stamp = tcp_time_stamp; 1718 tp->snd_cwnd_stamp = tcp_time_stamp;
1700 tcp_ca_event(tp, CA_EVENT_COMPLETE_CWR); 1719 tcp_ca_event(sk, CA_EVENT_COMPLETE_CWR);
1701} 1720}
1702 1721
1703static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag) 1722static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag)
@@ -1708,21 +1727,21 @@ static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag)
1708 tp->retrans_stamp = 0; 1727 tp->retrans_stamp = 0;
1709 1728
1710 if (flag&FLAG_ECE) 1729 if (flag&FLAG_ECE)
1711 tcp_enter_cwr(tp); 1730 tcp_enter_cwr(sk);
1712 1731
1713 if (tp->ca_state != TCP_CA_CWR) { 1732 if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) {
1714 int state = TCP_CA_Open; 1733 int state = TCP_CA_Open;
1715 1734
1716 if (tp->left_out || tp->retrans_out || tp->undo_marker) 1735 if (tp->left_out || tp->retrans_out || tp->undo_marker)
1717 state = TCP_CA_Disorder; 1736 state = TCP_CA_Disorder;
1718 1737
1719 if (tp->ca_state != state) { 1738 if (inet_csk(sk)->icsk_ca_state != state) {
1720 tcp_set_ca_state(tp, state); 1739 tcp_set_ca_state(sk, state);
1721 tp->high_seq = tp->snd_nxt; 1740 tp->high_seq = tp->snd_nxt;
1722 } 1741 }
1723 tcp_moderate_cwnd(tp); 1742 tcp_moderate_cwnd(tp);
1724 } else { 1743 } else {
1725 tcp_cwnd_down(tp); 1744 tcp_cwnd_down(sk);
1726 } 1745 }
1727} 1746}
1728 1747
@@ -1741,6 +1760,7 @@ static void
1741tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una, 1760tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1742 int prior_packets, int flag) 1761 int prior_packets, int flag)
1743{ 1762{
1763 struct inet_connection_sock *icsk = inet_csk(sk);
1744 struct tcp_sock *tp = tcp_sk(sk); 1764 struct tcp_sock *tp = tcp_sk(sk);
1745 int is_dupack = (tp->snd_una == prior_snd_una && !(flag&FLAG_NOT_DUP)); 1765 int is_dupack = (tp->snd_una == prior_snd_una && !(flag&FLAG_NOT_DUP));
1746 1766
@@ -1764,7 +1784,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1764 /* C. Process data loss notification, provided it is valid. */ 1784 /* C. Process data loss notification, provided it is valid. */
1765 if ((flag&FLAG_DATA_LOST) && 1785 if ((flag&FLAG_DATA_LOST) &&
1766 before(tp->snd_una, tp->high_seq) && 1786 before(tp->snd_una, tp->high_seq) &&
1767 tp->ca_state != TCP_CA_Open && 1787 icsk->icsk_ca_state != TCP_CA_Open &&
1768 tp->fackets_out > tp->reordering) { 1788 tp->fackets_out > tp->reordering) {
1769 tcp_mark_head_lost(sk, tp, tp->fackets_out-tp->reordering, tp->high_seq); 1789 tcp_mark_head_lost(sk, tp, tp->fackets_out-tp->reordering, tp->high_seq);
1770 NET_INC_STATS_BH(LINUX_MIB_TCPLOSS); 1790 NET_INC_STATS_BH(LINUX_MIB_TCPLOSS);
@@ -1775,14 +1795,14 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1775 1795
1776 /* E. Check state exit conditions. State can be terminated 1796 /* E. Check state exit conditions. State can be terminated
1777 * when high_seq is ACKed. */ 1797 * when high_seq is ACKed. */
1778 if (tp->ca_state == TCP_CA_Open) { 1798 if (icsk->icsk_ca_state == TCP_CA_Open) {
1779 if (!sysctl_tcp_frto) 1799 if (!sysctl_tcp_frto)
1780 BUG_TRAP(tp->retrans_out == 0); 1800 BUG_TRAP(tp->retrans_out == 0);
1781 tp->retrans_stamp = 0; 1801 tp->retrans_stamp = 0;
1782 } else if (!before(tp->snd_una, tp->high_seq)) { 1802 } else if (!before(tp->snd_una, tp->high_seq)) {
1783 switch (tp->ca_state) { 1803 switch (icsk->icsk_ca_state) {
1784 case TCP_CA_Loss: 1804 case TCP_CA_Loss:
1785 inet_csk(sk)->icsk_retransmits = 0; 1805 icsk->icsk_retransmits = 0;
1786 if (tcp_try_undo_recovery(sk, tp)) 1806 if (tcp_try_undo_recovery(sk, tp))
1787 return; 1807 return;
1788 break; 1808 break;
@@ -1791,8 +1811,8 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1791 /* CWR is to be held something *above* high_seq 1811 /* CWR is to be held something *above* high_seq
1792 * is ACKed for CWR bit to reach receiver. */ 1812 * is ACKed for CWR bit to reach receiver. */
1793 if (tp->snd_una != tp->high_seq) { 1813 if (tp->snd_una != tp->high_seq) {
1794 tcp_complete_cwr(tp); 1814 tcp_complete_cwr(sk);
1795 tcp_set_ca_state(tp, TCP_CA_Open); 1815 tcp_set_ca_state(sk, TCP_CA_Open);
1796 } 1816 }
1797 break; 1817 break;
1798 1818
@@ -1803,7 +1823,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1803 * catching for all duplicate ACKs. */ 1823 * catching for all duplicate ACKs. */
1804 IsReno(tp) || tp->snd_una != tp->high_seq) { 1824 IsReno(tp) || tp->snd_una != tp->high_seq) {
1805 tp->undo_marker = 0; 1825 tp->undo_marker = 0;
1806 tcp_set_ca_state(tp, TCP_CA_Open); 1826 tcp_set_ca_state(sk, TCP_CA_Open);
1807 } 1827 }
1808 break; 1828 break;
1809 1829
@@ -1812,17 +1832,17 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1812 tcp_reset_reno_sack(tp); 1832 tcp_reset_reno_sack(tp);
1813 if (tcp_try_undo_recovery(sk, tp)) 1833 if (tcp_try_undo_recovery(sk, tp))
1814 return; 1834 return;
1815 tcp_complete_cwr(tp); 1835 tcp_complete_cwr(sk);
1816 break; 1836 break;
1817 } 1837 }
1818 } 1838 }
1819 1839
1820 /* F. Process state. */ 1840 /* F. Process state. */
1821 switch (tp->ca_state) { 1841 switch (icsk->icsk_ca_state) {
1822 case TCP_CA_Recovery: 1842 case TCP_CA_Recovery:
1823 if (prior_snd_una == tp->snd_una) { 1843 if (prior_snd_una == tp->snd_una) {
1824 if (IsReno(tp) && is_dupack) 1844 if (IsReno(tp) && is_dupack)
1825 tcp_add_reno_sack(tp); 1845 tcp_add_reno_sack(sk);
1826 } else { 1846 } else {
1827 int acked = prior_packets - tp->packets_out; 1847 int acked = prior_packets - tp->packets_out;
1828 if (IsReno(tp)) 1848 if (IsReno(tp))
@@ -1832,13 +1852,13 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1832 break; 1852 break;
1833 case TCP_CA_Loss: 1853 case TCP_CA_Loss:
1834 if (flag&FLAG_DATA_ACKED) 1854 if (flag&FLAG_DATA_ACKED)
1835 inet_csk(sk)->icsk_retransmits = 0; 1855 icsk->icsk_retransmits = 0;
1836 if (!tcp_try_undo_loss(sk, tp)) { 1856 if (!tcp_try_undo_loss(sk, tp)) {
1837 tcp_moderate_cwnd(tp); 1857 tcp_moderate_cwnd(tp);
1838 tcp_xmit_retransmit_queue(sk); 1858 tcp_xmit_retransmit_queue(sk);
1839 return; 1859 return;
1840 } 1860 }
1841 if (tp->ca_state != TCP_CA_Open) 1861 if (icsk->icsk_ca_state != TCP_CA_Open)
1842 return; 1862 return;
1843 /* Loss is undone; fall through to processing in Open state. */ 1863 /* Loss is undone; fall through to processing in Open state. */
1844 default: 1864 default:
@@ -1846,10 +1866,10 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1846 if (tp->snd_una != prior_snd_una) 1866 if (tp->snd_una != prior_snd_una)
1847 tcp_reset_reno_sack(tp); 1867 tcp_reset_reno_sack(tp);
1848 if (is_dupack) 1868 if (is_dupack)
1849 tcp_add_reno_sack(tp); 1869 tcp_add_reno_sack(sk);
1850 } 1870 }
1851 1871
1852 if (tp->ca_state == TCP_CA_Disorder) 1872 if (icsk->icsk_ca_state == TCP_CA_Disorder)
1853 tcp_try_undo_dsack(sk, tp); 1873 tcp_try_undo_dsack(sk, tp);
1854 1874
1855 if (!tcp_time_to_recover(sk, tp)) { 1875 if (!tcp_time_to_recover(sk, tp)) {
@@ -1869,20 +1889,20 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
1869 tp->undo_marker = tp->snd_una; 1889 tp->undo_marker = tp->snd_una;
1870 tp->undo_retrans = tp->retrans_out; 1890 tp->undo_retrans = tp->retrans_out;
1871 1891
1872 if (tp->ca_state < TCP_CA_CWR) { 1892 if (icsk->icsk_ca_state < TCP_CA_CWR) {
1873 if (!(flag&FLAG_ECE)) 1893 if (!(flag&FLAG_ECE))
1874 tp->prior_ssthresh = tcp_current_ssthresh(tp); 1894 tp->prior_ssthresh = tcp_current_ssthresh(sk);
1875 tp->snd_ssthresh = tp->ca_ops->ssthresh(tp); 1895 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
1876 TCP_ECN_queue_cwr(tp); 1896 TCP_ECN_queue_cwr(tp);
1877 } 1897 }
1878 1898
1879 tp->snd_cwnd_cnt = 0; 1899 tp->snd_cwnd_cnt = 0;
1880 tcp_set_ca_state(tp, TCP_CA_Recovery); 1900 tcp_set_ca_state(sk, TCP_CA_Recovery);
1881 } 1901 }
1882 1902
1883 if (is_dupack || tcp_head_timedout(sk, tp)) 1903 if (is_dupack || tcp_head_timedout(sk, tp))
1884 tcp_update_scoreboard(sk, tp); 1904 tcp_update_scoreboard(sk, tp);
1885 tcp_cwnd_down(tp); 1905 tcp_cwnd_down(sk);
1886 tcp_xmit_retransmit_queue(sk); 1906 tcp_xmit_retransmit_queue(sk);
1887} 1907}
1888 1908
@@ -1908,7 +1928,7 @@ static void tcp_ack_saw_tstamp(struct sock *sk, u32 *usrtt, int flag)
1908 */ 1928 */
1909 struct tcp_sock *tp = tcp_sk(sk); 1929 struct tcp_sock *tp = tcp_sk(sk);
1910 const __u32 seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr; 1930 const __u32 seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr;
1911 tcp_rtt_estimator(tp, seq_rtt, usrtt); 1931 tcp_rtt_estimator(sk, seq_rtt, usrtt);
1912 tcp_set_rto(sk); 1932 tcp_set_rto(sk);
1913 inet_csk(sk)->icsk_backoff = 0; 1933 inet_csk(sk)->icsk_backoff = 0;
1914 tcp_bound_rto(sk); 1934 tcp_bound_rto(sk);
@@ -1928,7 +1948,7 @@ static void tcp_ack_no_tstamp(struct sock *sk, u32 seq_rtt, u32 *usrtt, int flag
1928 if (flag & FLAG_RETRANS_DATA_ACKED) 1948 if (flag & FLAG_RETRANS_DATA_ACKED)
1929 return; 1949 return;
1930 1950
1931 tcp_rtt_estimator(tcp_sk(sk), seq_rtt, usrtt); 1951 tcp_rtt_estimator(sk, seq_rtt, usrtt);
1932 tcp_set_rto(sk); 1952 tcp_set_rto(sk);
1933 inet_csk(sk)->icsk_backoff = 0; 1953 inet_csk(sk)->icsk_backoff = 0;
1934 tcp_bound_rto(sk); 1954 tcp_bound_rto(sk);
@@ -1945,11 +1965,12 @@ static inline void tcp_ack_update_rtt(struct sock *sk, const int flag,
1945 tcp_ack_no_tstamp(sk, seq_rtt, usrtt, flag); 1965 tcp_ack_no_tstamp(sk, seq_rtt, usrtt, flag);
1946} 1966}
1947 1967
1948static inline void tcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, 1968static inline void tcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
1949 u32 in_flight, int good) 1969 u32 in_flight, int good)
1950{ 1970{
1951 tp->ca_ops->cong_avoid(tp, ack, rtt, in_flight, good); 1971 const struct inet_connection_sock *icsk = inet_csk(sk);
1952 tp->snd_cwnd_stamp = tcp_time_stamp; 1972 icsk->icsk_ca_ops->cong_avoid(sk, ack, rtt, in_flight, good);
1973 tcp_sk(sk)->snd_cwnd_stamp = tcp_time_stamp;
1953} 1974}
1954 1975
1955/* Restart timer after forward progress on connection. 1976/* Restart timer after forward progress on connection.
@@ -2098,11 +2119,12 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
2098 } 2119 }
2099 2120
2100 if (acked&FLAG_ACKED) { 2121 if (acked&FLAG_ACKED) {
2122 const struct inet_connection_sock *icsk = inet_csk(sk);
2101 tcp_ack_update_rtt(sk, acked, seq_rtt, seq_usrtt); 2123 tcp_ack_update_rtt(sk, acked, seq_rtt, seq_usrtt);
2102 tcp_ack_packets_out(sk, tp); 2124 tcp_ack_packets_out(sk, tp);
2103 2125
2104 if (tp->ca_ops->pkts_acked) 2126 if (icsk->icsk_ca_ops->pkts_acked)
2105 tp->ca_ops->pkts_acked(tp, pkts_acked); 2127 icsk->icsk_ca_ops->pkts_acked(sk, pkts_acked);
2106 } 2128 }
2107 2129
2108#if FASTRETRANS_DEBUG > 0 2130#if FASTRETRANS_DEBUG > 0
@@ -2110,19 +2132,20 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
2110 BUG_TRAP((int)tp->lost_out >= 0); 2132 BUG_TRAP((int)tp->lost_out >= 0);
2111 BUG_TRAP((int)tp->retrans_out >= 0); 2133 BUG_TRAP((int)tp->retrans_out >= 0);
2112 if (!tp->packets_out && tp->rx_opt.sack_ok) { 2134 if (!tp->packets_out && tp->rx_opt.sack_ok) {
2135 const struct inet_connection_sock *icsk = inet_csk(sk);
2113 if (tp->lost_out) { 2136 if (tp->lost_out) {
2114 printk(KERN_DEBUG "Leak l=%u %d\n", 2137 printk(KERN_DEBUG "Leak l=%u %d\n",
2115 tp->lost_out, tp->ca_state); 2138 tp->lost_out, icsk->icsk_ca_state);
2116 tp->lost_out = 0; 2139 tp->lost_out = 0;
2117 } 2140 }
2118 if (tp->sacked_out) { 2141 if (tp->sacked_out) {
2119 printk(KERN_DEBUG "Leak s=%u %d\n", 2142 printk(KERN_DEBUG "Leak s=%u %d\n",
2120 tp->sacked_out, tp->ca_state); 2143 tp->sacked_out, icsk->icsk_ca_state);
2121 tp->sacked_out = 0; 2144 tp->sacked_out = 0;
2122 } 2145 }
2123 if (tp->retrans_out) { 2146 if (tp->retrans_out) {
2124 printk(KERN_DEBUG "Leak r=%u %d\n", 2147 printk(KERN_DEBUG "Leak r=%u %d\n",
2125 tp->retrans_out, tp->ca_state); 2148 tp->retrans_out, icsk->icsk_ca_state);
2126 tp->retrans_out = 0; 2149 tp->retrans_out = 0;
2127 } 2150 }
2128 } 2151 }
@@ -2152,16 +2175,17 @@ static void tcp_ack_probe(struct sock *sk)
2152 } 2175 }
2153} 2176}
2154 2177
2155static inline int tcp_ack_is_dubious(struct tcp_sock *tp, int flag) 2178static inline int tcp_ack_is_dubious(const struct sock *sk, const int flag)
2156{ 2179{
2157 return (!(flag & FLAG_NOT_DUP) || (flag & FLAG_CA_ALERT) || 2180 return (!(flag & FLAG_NOT_DUP) || (flag & FLAG_CA_ALERT) ||
2158 tp->ca_state != TCP_CA_Open); 2181 inet_csk(sk)->icsk_ca_state != TCP_CA_Open);
2159} 2182}
2160 2183
2161static inline int tcp_may_raise_cwnd(struct tcp_sock *tp, int flag) 2184static inline int tcp_may_raise_cwnd(const struct sock *sk, const int flag)
2162{ 2185{
2186 const struct tcp_sock *tp = tcp_sk(sk);
2163 return (!(flag & FLAG_ECE) || tp->snd_cwnd < tp->snd_ssthresh) && 2187 return (!(flag & FLAG_ECE) || tp->snd_cwnd < tp->snd_ssthresh) &&
2164 !((1<<tp->ca_state)&(TCPF_CA_Recovery|TCPF_CA_CWR)); 2188 !((1 << inet_csk(sk)->icsk_ca_state) & (TCPF_CA_Recovery | TCPF_CA_CWR));
2165} 2189}
2166 2190
2167/* Check that window update is acceptable. 2191/* Check that window update is acceptable.
@@ -2251,6 +2275,7 @@ static void tcp_process_frto(struct sock *sk, u32 prior_snd_una)
2251/* This routine deals with incoming acks, but not outgoing ones. */ 2275/* This routine deals with incoming acks, but not outgoing ones. */
2252static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) 2276static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
2253{ 2277{
2278 struct inet_connection_sock *icsk = inet_csk(sk);
2254 struct tcp_sock *tp = tcp_sk(sk); 2279 struct tcp_sock *tp = tcp_sk(sk);
2255 u32 prior_snd_una = tp->snd_una; 2280 u32 prior_snd_una = tp->snd_una;
2256 u32 ack_seq = TCP_SKB_CB(skb)->seq; 2281 u32 ack_seq = TCP_SKB_CB(skb)->seq;
@@ -2278,7 +2303,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
2278 tp->snd_una = ack; 2303 tp->snd_una = ack;
2279 flag |= FLAG_WIN_UPDATE; 2304 flag |= FLAG_WIN_UPDATE;
2280 2305
2281 tcp_ca_event(tp, CA_EVENT_FAST_ACK); 2306 tcp_ca_event(sk, CA_EVENT_FAST_ACK);
2282 2307
2283 NET_INC_STATS_BH(LINUX_MIB_TCPHPACKS); 2308 NET_INC_STATS_BH(LINUX_MIB_TCPHPACKS);
2284 } else { 2309 } else {
@@ -2295,7 +2320,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
2295 if (TCP_ECN_rcv_ecn_echo(tp, skb->h.th)) 2320 if (TCP_ECN_rcv_ecn_echo(tp, skb->h.th))
2296 flag |= FLAG_ECE; 2321 flag |= FLAG_ECE;
2297 2322
2298 tcp_ca_event(tp, CA_EVENT_SLOW_ACK); 2323 tcp_ca_event(sk, CA_EVENT_SLOW_ACK);
2299 } 2324 }
2300 2325
2301 /* We passed data and got it acked, remove any soft error 2326 /* We passed data and got it acked, remove any soft error
@@ -2311,19 +2336,19 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
2311 2336
2312 /* See if we can take anything off of the retransmit queue. */ 2337 /* See if we can take anything off of the retransmit queue. */
2313 flag |= tcp_clean_rtx_queue(sk, &seq_rtt, 2338 flag |= tcp_clean_rtx_queue(sk, &seq_rtt,
2314 tp->ca_ops->rtt_sample ? &seq_usrtt : NULL); 2339 icsk->icsk_ca_ops->rtt_sample ? &seq_usrtt : NULL);
2315 2340
2316 if (tp->frto_counter) 2341 if (tp->frto_counter)
2317 tcp_process_frto(sk, prior_snd_una); 2342 tcp_process_frto(sk, prior_snd_una);
2318 2343
2319 if (tcp_ack_is_dubious(tp, flag)) { 2344 if (tcp_ack_is_dubious(sk, flag)) {
2320 /* Advanve CWND, if state allows this. */ 2345 /* Advanve CWND, if state allows this. */
2321 if ((flag & FLAG_DATA_ACKED) && tcp_may_raise_cwnd(tp, flag)) 2346 if ((flag & FLAG_DATA_ACKED) && tcp_may_raise_cwnd(sk, flag))
2322 tcp_cong_avoid(tp, ack, seq_rtt, prior_in_flight, 0); 2347 tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 0);
2323 tcp_fastretrans_alert(sk, prior_snd_una, prior_packets, flag); 2348 tcp_fastretrans_alert(sk, prior_snd_una, prior_packets, flag);
2324 } else { 2349 } else {
2325 if ((flag & FLAG_DATA_ACKED)) 2350 if ((flag & FLAG_DATA_ACKED))
2326 tcp_cong_avoid(tp, ack, seq_rtt, prior_in_flight, 1); 2351 tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 1);
2327 } 2352 }
2328 2353
2329 if ((flag & FLAG_FORWARD_PROGRESS) || !(flag&FLAG_NOT_DUP)) 2354 if ((flag & FLAG_FORWARD_PROGRESS) || !(flag&FLAG_NOT_DUP))
@@ -2332,7 +2357,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
2332 return 1; 2357 return 1;
2333 2358
2334no_queue: 2359no_queue:
2335 tp->probes_out = 0; 2360 icsk->icsk_probes_out = 0;
2336 2361
2337 /* If this ack opens up a zero window, clear backoff. It was 2362 /* If this ack opens up a zero window, clear backoff. It was
2338 * being used to time the probes, and is probably far higher than 2363 * being used to time the probes, and is probably far higher than
@@ -3301,12 +3326,12 @@ void tcp_cwnd_application_limited(struct sock *sk)
3301{ 3326{
3302 struct tcp_sock *tp = tcp_sk(sk); 3327 struct tcp_sock *tp = tcp_sk(sk);
3303 3328
3304 if (tp->ca_state == TCP_CA_Open && 3329 if (inet_csk(sk)->icsk_ca_state == TCP_CA_Open &&
3305 sk->sk_socket && !test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { 3330 sk->sk_socket && !test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
3306 /* Limited by application or receiver window. */ 3331 /* Limited by application or receiver window. */
3307 u32 win_used = max(tp->snd_cwnd_used, 2U); 3332 u32 win_used = max(tp->snd_cwnd_used, 2U);
3308 if (win_used < tp->snd_cwnd) { 3333 if (win_used < tp->snd_cwnd) {
3309 tp->snd_ssthresh = tcp_current_ssthresh(tp); 3334 tp->snd_ssthresh = tcp_current_ssthresh(sk);
3310 tp->snd_cwnd = (tp->snd_cwnd + win_used) >> 1; 3335 tp->snd_cwnd = (tp->snd_cwnd + win_used) >> 1;
3311 } 3336 }
3312 tp->snd_cwnd_used = 0; 3337 tp->snd_cwnd_used = 0;
@@ -3935,7 +3960,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
3935 3960
3936 tcp_init_metrics(sk); 3961 tcp_init_metrics(sk);
3937 3962
3938 tcp_init_congestion_control(tp); 3963 tcp_init_congestion_control(sk);
3939 3964
3940 /* Prevent spurious tcp_cwnd_restart() on first data 3965 /* Prevent spurious tcp_cwnd_restart() on first data
3941 * packet. 3966 * packet.
@@ -4212,7 +4237,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
4212 4237
4213 tcp_init_metrics(sk); 4238 tcp_init_metrics(sk);
4214 4239
4215 tcp_init_congestion_control(tp); 4240 tcp_init_congestion_control(sk);
4216 4241
4217 /* Prevent spurious tcp_cwnd_restart() on 4242 /* Prevent spurious tcp_cwnd_restart() on
4218 * first data packet. 4243 * first data packet.
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 32a0ebc589d5..97bbf595230d 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1409,13 +1409,14 @@ struct tcp_func ipv4_specific = {
1409 */ 1409 */
1410static int tcp_v4_init_sock(struct sock *sk) 1410static int tcp_v4_init_sock(struct sock *sk)
1411{ 1411{
1412 struct inet_connection_sock *icsk = inet_csk(sk);
1412 struct tcp_sock *tp = tcp_sk(sk); 1413 struct tcp_sock *tp = tcp_sk(sk);
1413 1414
1414 skb_queue_head_init(&tp->out_of_order_queue); 1415 skb_queue_head_init(&tp->out_of_order_queue);
1415 tcp_init_xmit_timers(sk); 1416 tcp_init_xmit_timers(sk);
1416 tcp_prequeue_init(tp); 1417 tcp_prequeue_init(tp);
1417 1418
1418 inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT; 1419 icsk->icsk_rto = TCP_TIMEOUT_INIT;
1419 tp->mdev = TCP_TIMEOUT_INIT; 1420 tp->mdev = TCP_TIMEOUT_INIT;
1420 1421
1421 /* So many TCP implementations out there (incorrectly) count the 1422 /* So many TCP implementations out there (incorrectly) count the
@@ -1433,7 +1434,7 @@ static int tcp_v4_init_sock(struct sock *sk)
1433 tp->mss_cache = 536; 1434 tp->mss_cache = 536;
1434 1435
1435 tp->reordering = sysctl_tcp_reordering; 1436 tp->reordering = sysctl_tcp_reordering;
1436 tp->ca_ops = &tcp_init_congestion_ops; 1437 icsk->icsk_ca_ops = &tcp_init_congestion_ops;
1437 1438
1438 sk->sk_state = TCP_CLOSE; 1439 sk->sk_state = TCP_CLOSE;
1439 1440
@@ -1456,7 +1457,7 @@ int tcp_v4_destroy_sock(struct sock *sk)
1456 1457
1457 tcp_clear_xmit_timers(sk); 1458 tcp_clear_xmit_timers(sk);
1458 1459
1459 tcp_cleanup_congestion_control(tp); 1460 tcp_cleanup_congestion_control(sk);
1460 1461
1461 /* Cleanup up the write buffer. */ 1462 /* Cleanup up the write buffer. */
1462 sk_stream_writequeue_purge(sk); 1463 sk_stream_writequeue_purge(sk);
@@ -1883,7 +1884,7 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i)
1883 jiffies_to_clock_t(timer_expires - jiffies), 1884 jiffies_to_clock_t(timer_expires - jiffies),
1884 icsk->icsk_retransmits, 1885 icsk->icsk_retransmits,
1885 sock_i_uid(sp), 1886 sock_i_uid(sp),
1886 tp->probes_out, 1887 icsk->icsk_probes_out,
1887 sock_i_ino(sp), 1888 sock_i_ino(sp),
1888 atomic_read(&sp->sk_refcnt), sp, 1889 atomic_read(&sp->sk_refcnt), sp,
1889 icsk->icsk_rto, 1890 icsk->icsk_rto,
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index dc085233d512..a88db28b0af7 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -384,9 +384,9 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
384 newtp->frto_counter = 0; 384 newtp->frto_counter = 0;
385 newtp->frto_highmark = 0; 385 newtp->frto_highmark = 0;
386 386
387 newtp->ca_ops = &tcp_reno; 387 newicsk->icsk_ca_ops = &tcp_reno;
388 388
389 tcp_set_ca_state(newtp, TCP_CA_Open); 389 tcp_set_ca_state(newsk, TCP_CA_Open);
390 tcp_init_xmit_timers(newsk); 390 tcp_init_xmit_timers(newsk);
391 skb_queue_head_init(&newtp->out_of_order_queue); 391 skb_queue_head_init(&newtp->out_of_order_queue);
392 newtp->rcv_wup = treq->rcv_isn + 1; 392 newtp->rcv_wup = treq->rcv_isn + 1;
@@ -399,7 +399,6 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
399 newtp->rx_opt.dsack = 0; 399 newtp->rx_opt.dsack = 0;
400 newtp->rx_opt.eff_sacks = 0; 400 newtp->rx_opt.eff_sacks = 0;
401 401
402 newtp->probes_out = 0;
403 newtp->rx_opt.num_sacks = 0; 402 newtp->rx_opt.num_sacks = 0;
404 newtp->urg_data = 0; 403 newtp->urg_data = 0;
405 404
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f458eacb5ef2..267b0fcbfc9c 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -112,9 +112,9 @@ static void tcp_cwnd_restart(struct sock *sk, struct dst_entry *dst)
112 u32 restart_cwnd = tcp_init_cwnd(tp, dst); 112 u32 restart_cwnd = tcp_init_cwnd(tp, dst);
113 u32 cwnd = tp->snd_cwnd; 113 u32 cwnd = tp->snd_cwnd;
114 114
115 tcp_ca_event(tp, CA_EVENT_CWND_RESTART); 115 tcp_ca_event(sk, CA_EVENT_CWND_RESTART);
116 116
117 tp->snd_ssthresh = tcp_current_ssthresh(tp); 117 tp->snd_ssthresh = tcp_current_ssthresh(sk);
118 restart_cwnd = min(restart_cwnd, cwnd); 118 restart_cwnd = min(restart_cwnd, cwnd);
119 119
120 while ((delta -= inet_csk(sk)->icsk_rto) > 0 && cwnd > restart_cwnd) 120 while ((delta -= inet_csk(sk)->icsk_rto) > 0 && cwnd > restart_cwnd)
@@ -265,6 +265,7 @@ static __inline__ u16 tcp_select_window(struct sock *sk)
265static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb) 265static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
266{ 266{
267 if (skb != NULL) { 267 if (skb != NULL) {
268 const struct inet_connection_sock *icsk = inet_csk(sk);
268 struct inet_sock *inet = inet_sk(sk); 269 struct inet_sock *inet = inet_sk(sk);
269 struct tcp_sock *tp = tcp_sk(sk); 270 struct tcp_sock *tp = tcp_sk(sk);
270 struct tcp_skb_cb *tcb = TCP_SKB_CB(skb); 271 struct tcp_skb_cb *tcb = TCP_SKB_CB(skb);
@@ -280,7 +281,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
280#define SYSCTL_FLAG_SACK 0x4 281#define SYSCTL_FLAG_SACK 0x4
281 282
282 /* If congestion control is doing timestamping */ 283 /* If congestion control is doing timestamping */
283 if (tp->ca_ops->rtt_sample) 284 if (icsk->icsk_ca_ops->rtt_sample)
284 do_gettimeofday(&skb->stamp); 285 do_gettimeofday(&skb->stamp);
285 286
286 sysctl_flags = 0; 287 sysctl_flags = 0;
@@ -308,7 +309,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
308 } 309 }
309 310
310 if (tcp_packets_in_flight(tp) == 0) 311 if (tcp_packets_in_flight(tp) == 0)
311 tcp_ca_event(tp, CA_EVENT_TX_START); 312 tcp_ca_event(sk, CA_EVENT_TX_START);
312 313
313 th = (struct tcphdr *) skb_push(skb, tcp_header_size); 314 th = (struct tcphdr *) skb_push(skb, tcp_header_size);
314 skb->h.th = th; 315 skb->h.th = th;
@@ -366,7 +367,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
366 if (err <= 0) 367 if (err <= 0)
367 return err; 368 return err;
368 369
369 tcp_enter_cwr(tp); 370 tcp_enter_cwr(sk);
370 371
371 /* NET_XMIT_CN is special. It does not guarantee, 372 /* NET_XMIT_CN is special. It does not guarantee,
372 * that this packet is lost. It tells that device 373 * that this packet is lost. It tells that device
@@ -905,12 +906,13 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
905 */ 906 */
906static int tcp_tso_should_defer(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb) 907static int tcp_tso_should_defer(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb)
907{ 908{
909 const struct inet_connection_sock *icsk = inet_csk(sk);
908 u32 send_win, cong_win, limit, in_flight; 910 u32 send_win, cong_win, limit, in_flight;
909 911
910 if (TCP_SKB_CB(skb)->flags & TCPCB_FLAG_FIN) 912 if (TCP_SKB_CB(skb)->flags & TCPCB_FLAG_FIN)
911 return 0; 913 return 0;
912 914
913 if (tp->ca_state != TCP_CA_Open) 915 if (icsk->icsk_ca_state != TCP_CA_Open)
914 return 0; 916 return 0;
915 917
916 in_flight = tcp_packets_in_flight(tp); 918 in_flight = tcp_packets_in_flight(tp);
@@ -1287,6 +1289,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
1287 */ 1289 */
1288void tcp_simple_retransmit(struct sock *sk) 1290void tcp_simple_retransmit(struct sock *sk)
1289{ 1291{
1292 const struct inet_connection_sock *icsk = inet_csk(sk);
1290 struct tcp_sock *tp = tcp_sk(sk); 1293 struct tcp_sock *tp = tcp_sk(sk);
1291 struct sk_buff *skb; 1294 struct sk_buff *skb;
1292 unsigned int mss = tcp_current_mss(sk, 0); 1295 unsigned int mss = tcp_current_mss(sk, 0);
@@ -1317,12 +1320,12 @@ void tcp_simple_retransmit(struct sock *sk)
1317 * in network, but units changed and effective 1320 * in network, but units changed and effective
1318 * cwnd/ssthresh really reduced now. 1321 * cwnd/ssthresh really reduced now.
1319 */ 1322 */
1320 if (tp->ca_state != TCP_CA_Loss) { 1323 if (icsk->icsk_ca_state != TCP_CA_Loss) {
1321 tp->high_seq = tp->snd_nxt; 1324 tp->high_seq = tp->snd_nxt;
1322 tp->snd_ssthresh = tcp_current_ssthresh(tp); 1325 tp->snd_ssthresh = tcp_current_ssthresh(sk);
1323 tp->prior_ssthresh = 0; 1326 tp->prior_ssthresh = 0;
1324 tp->undo_marker = 0; 1327 tp->undo_marker = 0;
1325 tcp_set_ca_state(tp, TCP_CA_Loss); 1328 tcp_set_ca_state(sk, TCP_CA_Loss);
1326 } 1329 }
1327 tcp_xmit_retransmit_queue(sk); 1330 tcp_xmit_retransmit_queue(sk);
1328} 1331}
@@ -1462,6 +1465,7 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
1462 */ 1465 */
1463void tcp_xmit_retransmit_queue(struct sock *sk) 1466void tcp_xmit_retransmit_queue(struct sock *sk)
1464{ 1467{
1468 const struct inet_connection_sock *icsk = inet_csk(sk);
1465 struct tcp_sock *tp = tcp_sk(sk); 1469 struct tcp_sock *tp = tcp_sk(sk);
1466 struct sk_buff *skb; 1470 struct sk_buff *skb;
1467 int packet_cnt = tp->lost_out; 1471 int packet_cnt = tp->lost_out;
@@ -1485,7 +1489,7 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
1485 if (!(sacked&(TCPCB_SACKED_ACKED|TCPCB_SACKED_RETRANS))) { 1489 if (!(sacked&(TCPCB_SACKED_ACKED|TCPCB_SACKED_RETRANS))) {
1486 if (tcp_retransmit_skb(sk, skb)) 1490 if (tcp_retransmit_skb(sk, skb))
1487 return; 1491 return;
1488 if (tp->ca_state != TCP_CA_Loss) 1492 if (icsk->icsk_ca_state != TCP_CA_Loss)
1489 NET_INC_STATS_BH(LINUX_MIB_TCPFASTRETRANS); 1493 NET_INC_STATS_BH(LINUX_MIB_TCPFASTRETRANS);
1490 else 1494 else
1491 NET_INC_STATS_BH(LINUX_MIB_TCPSLOWSTARTRETRANS); 1495 NET_INC_STATS_BH(LINUX_MIB_TCPSLOWSTARTRETRANS);
@@ -1507,7 +1511,7 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
1507 /* OK, demanded retransmission is finished. */ 1511 /* OK, demanded retransmission is finished. */
1508 1512
1509 /* Forward retransmissions are possible only during Recovery. */ 1513 /* Forward retransmissions are possible only during Recovery. */
1510 if (tp->ca_state != TCP_CA_Recovery) 1514 if (icsk->icsk_ca_state != TCP_CA_Recovery)
1511 return; 1515 return;
1512 1516
1513 /* No forward retransmissions in Reno are possible. */ 1517 /* No forward retransmissions in Reno are possible. */
@@ -2028,7 +2032,7 @@ void tcp_send_probe0(struct sock *sk)
2028 2032
2029 if (tp->packets_out || !sk->sk_send_head) { 2033 if (tp->packets_out || !sk->sk_send_head) {
2030 /* Cancel probe timer, if it is not required. */ 2034 /* Cancel probe timer, if it is not required. */
2031 tp->probes_out = 0; 2035 icsk->icsk_probes_out = 0;
2032 icsk->icsk_backoff = 0; 2036 icsk->icsk_backoff = 0;
2033 return; 2037 return;
2034 } 2038 }
@@ -2036,19 +2040,19 @@ void tcp_send_probe0(struct sock *sk)
2036 if (err <= 0) { 2040 if (err <= 0) {
2037 if (icsk->icsk_backoff < sysctl_tcp_retries2) 2041 if (icsk->icsk_backoff < sysctl_tcp_retries2)
2038 icsk->icsk_backoff++; 2042 icsk->icsk_backoff++;
2039 tp->probes_out++; 2043 icsk->icsk_probes_out++;
2040 inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0, 2044 inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
2041 min(icsk->icsk_rto << icsk->icsk_backoff, TCP_RTO_MAX), 2045 min(icsk->icsk_rto << icsk->icsk_backoff, TCP_RTO_MAX),
2042 TCP_RTO_MAX); 2046 TCP_RTO_MAX);
2043 } else { 2047 } else {
2044 /* If packet was not sent due to local congestion, 2048 /* If packet was not sent due to local congestion,
2045 * do not backoff and do not remember probes_out. 2049 * do not backoff and do not remember icsk_probes_out.
2046 * Let local senders to fight for local resources. 2050 * Let local senders to fight for local resources.
2047 * 2051 *
2048 * Use accumulated backoff yet. 2052 * Use accumulated backoff yet.
2049 */ 2053 */
2050 if (!tp->probes_out) 2054 if (!icsk->icsk_probes_out)
2051 tp->probes_out=1; 2055 icsk->icsk_probes_out = 1;
2052 inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0, 2056 inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
2053 min(icsk->icsk_rto << icsk->icsk_backoff, 2057 min(icsk->icsk_rto << icsk->icsk_backoff,
2054 TCP_RESOURCE_PROBE_INTERVAL), 2058 TCP_RESOURCE_PROBE_INTERVAL),
diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c
index 70e108e15c71..327770bf5522 100644
--- a/net/ipv4/tcp_scalable.c
+++ b/net/ipv4/tcp_scalable.c
@@ -16,9 +16,10 @@
16#define TCP_SCALABLE_AI_CNT 50U 16#define TCP_SCALABLE_AI_CNT 50U
17#define TCP_SCALABLE_MD_SCALE 3 17#define TCP_SCALABLE_MD_SCALE 3
18 18
19static void tcp_scalable_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, 19static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
20 u32 in_flight, int flag) 20 u32 in_flight, int flag)
21{ 21{
22 struct tcp_sock *tp = tcp_sk(sk);
22 if (in_flight < tp->snd_cwnd) 23 if (in_flight < tp->snd_cwnd)
23 return; 24 return;
24 25
@@ -35,8 +36,9 @@ static void tcp_scalable_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
35 tp->snd_cwnd_stamp = tcp_time_stamp; 36 tp->snd_cwnd_stamp = tcp_time_stamp;
36} 37}
37 38
38static u32 tcp_scalable_ssthresh(struct tcp_sock *tp) 39static u32 tcp_scalable_ssthresh(struct sock *sk)
39{ 40{
41 const struct tcp_sock *tp = tcp_sk(sk);
40 return max(tp->snd_cwnd - (tp->snd_cwnd>>TCP_SCALABLE_MD_SCALE), 2U); 42 return max(tp->snd_cwnd - (tp->snd_cwnd>>TCP_SCALABLE_MD_SCALE), 2U);
41} 43}
42 44
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 72cec6981830..415ee47ac1c5 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -233,11 +233,12 @@ out_unlock:
233 233
234static void tcp_probe_timer(struct sock *sk) 234static void tcp_probe_timer(struct sock *sk)
235{ 235{
236 struct inet_connection_sock *icsk = inet_csk(sk);
236 struct tcp_sock *tp = tcp_sk(sk); 237 struct tcp_sock *tp = tcp_sk(sk);
237 int max_probes; 238 int max_probes;
238 239
239 if (tp->packets_out || !sk->sk_send_head) { 240 if (tp->packets_out || !sk->sk_send_head) {
240 tp->probes_out = 0; 241 icsk->icsk_probes_out = 0;
241 return; 242 return;
242 } 243 }
243 244
@@ -248,7 +249,7 @@ static void tcp_probe_timer(struct sock *sk)
248 * FIXME: We ought not to do it, Solaris 2.5 actually has fixing 249 * FIXME: We ought not to do it, Solaris 2.5 actually has fixing
249 * this behaviour in Solaris down as a bug fix. [AC] 250 * this behaviour in Solaris down as a bug fix. [AC]
250 * 251 *
251 * Let me to explain. probes_out is zeroed by incoming ACKs 252 * Let me to explain. icsk_probes_out is zeroed by incoming ACKs
252 * even if they advertise zero window. Hence, connection is killed only 253 * even if they advertise zero window. Hence, connection is killed only
253 * if we received no ACKs for normal connection timeout. It is not killed 254 * if we received no ACKs for normal connection timeout. It is not killed
254 * only because window stays zero for some time, window may be zero 255 * only because window stays zero for some time, window may be zero
@@ -259,16 +260,15 @@ static void tcp_probe_timer(struct sock *sk)
259 max_probes = sysctl_tcp_retries2; 260 max_probes = sysctl_tcp_retries2;
260 261
261 if (sock_flag(sk, SOCK_DEAD)) { 262 if (sock_flag(sk, SOCK_DEAD)) {
262 const struct inet_connection_sock *icsk = inet_csk(sk);
263 const int alive = ((icsk->icsk_rto << icsk->icsk_backoff) < TCP_RTO_MAX); 263 const int alive = ((icsk->icsk_rto << icsk->icsk_backoff) < TCP_RTO_MAX);
264 264
265 max_probes = tcp_orphan_retries(sk, alive); 265 max_probes = tcp_orphan_retries(sk, alive);
266 266
267 if (tcp_out_of_resources(sk, alive || tp->probes_out <= max_probes)) 267 if (tcp_out_of_resources(sk, alive || icsk->icsk_probes_out <= max_probes))
268 return; 268 return;
269 } 269 }
270 270
271 if (tp->probes_out > max_probes) { 271 if (icsk->icsk_probes_out > max_probes) {
272 tcp_write_err(sk); 272 tcp_write_err(sk);
273 } else { 273 } else {
274 /* Only send another probe if we didn't close things up. */ 274 /* Only send another probe if we didn't close things up. */
@@ -319,19 +319,20 @@ static void tcp_retransmit_timer(struct sock *sk)
319 goto out; 319 goto out;
320 320
321 if (icsk->icsk_retransmits == 0) { 321 if (icsk->icsk_retransmits == 0) {
322 if (tp->ca_state == TCP_CA_Disorder || tp->ca_state == TCP_CA_Recovery) { 322 if (icsk->icsk_ca_state == TCP_CA_Disorder ||
323 icsk->icsk_ca_state == TCP_CA_Recovery) {
323 if (tp->rx_opt.sack_ok) { 324 if (tp->rx_opt.sack_ok) {
324 if (tp->ca_state == TCP_CA_Recovery) 325 if (icsk->icsk_ca_state == TCP_CA_Recovery)
325 NET_INC_STATS_BH(LINUX_MIB_TCPSACKRECOVERYFAIL); 326 NET_INC_STATS_BH(LINUX_MIB_TCPSACKRECOVERYFAIL);
326 else 327 else
327 NET_INC_STATS_BH(LINUX_MIB_TCPSACKFAILURES); 328 NET_INC_STATS_BH(LINUX_MIB_TCPSACKFAILURES);
328 } else { 329 } else {
329 if (tp->ca_state == TCP_CA_Recovery) 330 if (icsk->icsk_ca_state == TCP_CA_Recovery)
330 NET_INC_STATS_BH(LINUX_MIB_TCPRENORECOVERYFAIL); 331 NET_INC_STATS_BH(LINUX_MIB_TCPRENORECOVERYFAIL);
331 else 332 else
332 NET_INC_STATS_BH(LINUX_MIB_TCPRENOFAILURES); 333 NET_INC_STATS_BH(LINUX_MIB_TCPRENOFAILURES);
333 } 334 }
334 } else if (tp->ca_state == TCP_CA_Loss) { 335 } else if (icsk->icsk_ca_state == TCP_CA_Loss) {
335 NET_INC_STATS_BH(LINUX_MIB_TCPLOSSFAILURES); 336 NET_INC_STATS_BH(LINUX_MIB_TCPLOSSFAILURES);
336 } else { 337 } else {
337 NET_INC_STATS_BH(LINUX_MIB_TCPTIMEOUTS); 338 NET_INC_STATS_BH(LINUX_MIB_TCPTIMEOUTS);
@@ -449,6 +450,7 @@ void tcp_set_keepalive(struct sock *sk, int val)
449static void tcp_keepalive_timer (unsigned long data) 450static void tcp_keepalive_timer (unsigned long data)
450{ 451{
451 struct sock *sk = (struct sock *) data; 452 struct sock *sk = (struct sock *) data;
453 struct inet_connection_sock *icsk = inet_csk(sk);
452 struct tcp_sock *tp = tcp_sk(sk); 454 struct tcp_sock *tp = tcp_sk(sk);
453 __u32 elapsed; 455 __u32 elapsed;
454 456
@@ -490,14 +492,14 @@ static void tcp_keepalive_timer (unsigned long data)
490 elapsed = tcp_time_stamp - tp->rcv_tstamp; 492 elapsed = tcp_time_stamp - tp->rcv_tstamp;
491 493
492 if (elapsed >= keepalive_time_when(tp)) { 494 if (elapsed >= keepalive_time_when(tp)) {
493 if ((!tp->keepalive_probes && tp->probes_out >= sysctl_tcp_keepalive_probes) || 495 if ((!tp->keepalive_probes && icsk->icsk_probes_out >= sysctl_tcp_keepalive_probes) ||
494 (tp->keepalive_probes && tp->probes_out >= tp->keepalive_probes)) { 496 (tp->keepalive_probes && icsk->icsk_probes_out >= tp->keepalive_probes)) {
495 tcp_send_active_reset(sk, GFP_ATOMIC); 497 tcp_send_active_reset(sk, GFP_ATOMIC);
496 tcp_write_err(sk); 498 tcp_write_err(sk);
497 goto out; 499 goto out;
498 } 500 }
499 if (tcp_write_wakeup(sk) <= 0) { 501 if (tcp_write_wakeup(sk) <= 0) {
500 tp->probes_out++; 502 icsk->icsk_probes_out++;
501 elapsed = keepalive_intvl_when(tp); 503 elapsed = keepalive_intvl_when(tp);
502 } else { 504 } else {
503 /* If keepalive was lost due to local congestion, 505 /* If keepalive was lost due to local congestion,
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 9bd443db5193..054de24efee2 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -82,9 +82,10 @@ struct vegas {
82 * Instead we must wait until the completion of an RTT during 82 * Instead we must wait until the completion of an RTT during
83 * which we actually receive ACKs. 83 * which we actually receive ACKs.
84 */ 84 */
85static inline void vegas_enable(struct tcp_sock *tp) 85static inline void vegas_enable(struct sock *sk)
86{ 86{
87 struct vegas *vegas = tcp_ca(tp); 87 const struct tcp_sock *tp = tcp_sk(sk);
88 struct vegas *vegas = inet_csk_ca(sk);
88 89
89 /* Begin taking Vegas samples next time we send something. */ 90 /* Begin taking Vegas samples next time we send something. */
90 vegas->doing_vegas_now = 1; 91 vegas->doing_vegas_now = 1;
@@ -97,19 +98,19 @@ static inline void vegas_enable(struct tcp_sock *tp)
97} 98}
98 99
99/* Stop taking Vegas samples for now. */ 100/* Stop taking Vegas samples for now. */
100static inline void vegas_disable(struct tcp_sock *tp) 101static inline void vegas_disable(struct sock *sk)
101{ 102{
102 struct vegas *vegas = tcp_ca(tp); 103 struct vegas *vegas = inet_csk_ca(sk);
103 104
104 vegas->doing_vegas_now = 0; 105 vegas->doing_vegas_now = 0;
105} 106}
106 107
107static void tcp_vegas_init(struct tcp_sock *tp) 108static void tcp_vegas_init(struct sock *sk)
108{ 109{
109 struct vegas *vegas = tcp_ca(tp); 110 struct vegas *vegas = inet_csk_ca(sk);
110 111
111 vegas->baseRTT = 0x7fffffff; 112 vegas->baseRTT = 0x7fffffff;
112 vegas_enable(tp); 113 vegas_enable(sk);
113} 114}
114 115
115/* Do RTT sampling needed for Vegas. 116/* Do RTT sampling needed for Vegas.
@@ -120,9 +121,9 @@ static void tcp_vegas_init(struct tcp_sock *tp)
120 * o min-filter RTT samples from a much longer window (forever for now) 121 * o min-filter RTT samples from a much longer window (forever for now)
121 * to find the propagation delay (baseRTT) 122 * to find the propagation delay (baseRTT)
122 */ 123 */
123static void tcp_vegas_rtt_calc(struct tcp_sock *tp, u32 usrtt) 124static void tcp_vegas_rtt_calc(struct sock *sk, u32 usrtt)
124{ 125{
125 struct vegas *vegas = tcp_ca(tp); 126 struct vegas *vegas = inet_csk_ca(sk);
126 u32 vrtt = usrtt + 1; /* Never allow zero rtt or baseRTT */ 127 u32 vrtt = usrtt + 1; /* Never allow zero rtt or baseRTT */
127 128
128 /* Filter to find propagation delay: */ 129 /* Filter to find propagation delay: */
@@ -136,13 +137,13 @@ static void tcp_vegas_rtt_calc(struct tcp_sock *tp, u32 usrtt)
136 vegas->cntRTT++; 137 vegas->cntRTT++;
137} 138}
138 139
139static void tcp_vegas_state(struct tcp_sock *tp, u8 ca_state) 140static void tcp_vegas_state(struct sock *sk, u8 ca_state)
140{ 141{
141 142
142 if (ca_state == TCP_CA_Open) 143 if (ca_state == TCP_CA_Open)
143 vegas_enable(tp); 144 vegas_enable(sk);
144 else 145 else
145 vegas_disable(tp); 146 vegas_disable(sk);
146} 147}
147 148
148/* 149/*
@@ -154,20 +155,21 @@ static void tcp_vegas_state(struct tcp_sock *tp, u8 ca_state)
154 * packets, _then_ we can make Vegas calculations 155 * packets, _then_ we can make Vegas calculations
155 * again. 156 * again.
156 */ 157 */
157static void tcp_vegas_cwnd_event(struct tcp_sock *tp, enum tcp_ca_event event) 158static void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event)
158{ 159{
159 if (event == CA_EVENT_CWND_RESTART || 160 if (event == CA_EVENT_CWND_RESTART ||
160 event == CA_EVENT_TX_START) 161 event == CA_EVENT_TX_START)
161 tcp_vegas_init(tp); 162 tcp_vegas_init(sk);
162} 163}
163 164
164static void tcp_vegas_cong_avoid(struct tcp_sock *tp, u32 ack, 165static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
165 u32 seq_rtt, u32 in_flight, int flag) 166 u32 seq_rtt, u32 in_flight, int flag)
166{ 167{
167 struct vegas *vegas = tcp_ca(tp); 168 struct tcp_sock *tp = tcp_sk(sk);
169 struct vegas *vegas = inet_csk_ca(sk);
168 170
169 if (!vegas->doing_vegas_now) 171 if (!vegas->doing_vegas_now)
170 return tcp_reno_cong_avoid(tp, ack, seq_rtt, in_flight, flag); 172 return tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag);
171 173
172 /* The key players are v_beg_snd_una and v_beg_snd_nxt. 174 /* The key players are v_beg_snd_una and v_beg_snd_nxt.
173 * 175 *
@@ -219,7 +221,7 @@ static void tcp_vegas_cong_avoid(struct tcp_sock *tp, u32 ack,
219 * but that's not too awful, since we're taking the min, 221 * but that's not too awful, since we're taking the min,
220 * rather than averaging. 222 * rather than averaging.
221 */ 223 */
222 tcp_vegas_rtt_calc(tp, seq_rtt*1000); 224 tcp_vegas_rtt_calc(sk, seq_rtt * 1000);
223 225
224 /* We do the Vegas calculations only if we got enough RTT 226 /* We do the Vegas calculations only if we got enough RTT
225 * samples that we can be reasonably sure that we got 227 * samples that we can be reasonably sure that we got
@@ -359,10 +361,10 @@ static void tcp_vegas_cong_avoid(struct tcp_sock *tp, u32 ack,
359} 361}
360 362
361/* Extract info for Tcp socket info provided via netlink. */ 363/* Extract info for Tcp socket info provided via netlink. */
362static void tcp_vegas_get_info(struct tcp_sock *tp, u32 ext, 364static void tcp_vegas_get_info(struct sock *sk, u32 ext,
363 struct sk_buff *skb) 365 struct sk_buff *skb)
364{ 366{
365 const struct vegas *ca = tcp_ca(tp); 367 const struct vegas *ca = inet_csk_ca(sk);
366 if (ext & (1<<(TCPDIAG_VEGASINFO-1))) { 368 if (ext & (1<<(TCPDIAG_VEGASINFO-1))) {
367 struct tcpvegas_info *info; 369 struct tcpvegas_info *info;
368 370
@@ -393,7 +395,7 @@ static struct tcp_congestion_ops tcp_vegas = {
393 395
394static int __init tcp_vegas_register(void) 396static int __init tcp_vegas_register(void)
395{ 397{
396 BUG_ON(sizeof(struct vegas) > TCP_CA_PRIV_SIZE); 398 BUG_ON(sizeof(struct vegas) > ICSK_CA_PRIV_SIZE);
397 tcp_register_congestion_control(&tcp_vegas); 399 tcp_register_congestion_control(&tcp_vegas);
398 return 0; 400 return 0;
399} 401}
diff --git a/net/ipv4/tcp_westwood.c b/net/ipv4/tcp_westwood.c
index ef827242c940..d8a5a2b92e37 100644
--- a/net/ipv4/tcp_westwood.c
+++ b/net/ipv4/tcp_westwood.c
@@ -40,9 +40,9 @@ struct westwood {
40 * way as soon as possible. It will reasonably happen within the first 40 * way as soon as possible. It will reasonably happen within the first
41 * RTT period of the connection lifetime. 41 * RTT period of the connection lifetime.
42 */ 42 */
43static void tcp_westwood_init(struct tcp_sock *tp) 43static void tcp_westwood_init(struct sock *sk)
44{ 44{
45 struct westwood *w = tcp_ca(tp); 45 struct westwood *w = inet_csk_ca(sk);
46 46
47 w->bk = 0; 47 w->bk = 0;
48 w->bw_ns_est = 0; 48 w->bw_ns_est = 0;
@@ -51,7 +51,7 @@ static void tcp_westwood_init(struct tcp_sock *tp)
51 w->cumul_ack = 0; 51 w->cumul_ack = 0;
52 w->rtt_min = w->rtt = TCP_WESTWOOD_INIT_RTT; 52 w->rtt_min = w->rtt = TCP_WESTWOOD_INIT_RTT;
53 w->rtt_win_sx = tcp_time_stamp; 53 w->rtt_win_sx = tcp_time_stamp;
54 w->snd_una = tp->snd_una; 54 w->snd_una = tcp_sk(sk)->snd_una;
55} 55}
56 56
57/* 57/*
@@ -74,11 +74,11 @@ static inline void westwood_filter(struct westwood *w, u32 delta)
74 * Called after processing group of packets. 74 * Called after processing group of packets.
75 * but all westwood needs is the last sample of srtt. 75 * but all westwood needs is the last sample of srtt.
76 */ 76 */
77static void tcp_westwood_pkts_acked(struct tcp_sock *tp, u32 cnt) 77static void tcp_westwood_pkts_acked(struct sock *sk, u32 cnt)
78{ 78{
79 struct westwood *w = tcp_ca(tp); 79 struct westwood *w = inet_csk_ca(sk);
80 if (cnt > 0) 80 if (cnt > 0)
81 w->rtt = tp->srtt >> 3; 81 w->rtt = tcp_sk(sk)->srtt >> 3;
82} 82}
83 83
84/* 84/*
@@ -86,9 +86,9 @@ static void tcp_westwood_pkts_acked(struct tcp_sock *tp, u32 cnt)
86 * It updates RTT evaluation window if it is the right moment to do 86 * It updates RTT evaluation window if it is the right moment to do
87 * it. If so it calls filter for evaluating bandwidth. 87 * it. If so it calls filter for evaluating bandwidth.
88 */ 88 */
89static void westwood_update_window(struct tcp_sock *tp) 89static void westwood_update_window(struct sock *sk)
90{ 90{
91 struct westwood *w = tcp_ca(tp); 91 struct westwood *w = inet_csk_ca(sk);
92 s32 delta = tcp_time_stamp - w->rtt_win_sx; 92 s32 delta = tcp_time_stamp - w->rtt_win_sx;
93 93
94 /* 94 /*
@@ -114,11 +114,12 @@ static void westwood_update_window(struct tcp_sock *tp)
114 * header prediction is successful. In such case in fact update is 114 * header prediction is successful. In such case in fact update is
115 * straight forward and doesn't need any particular care. 115 * straight forward and doesn't need any particular care.
116 */ 116 */
117static inline void westwood_fast_bw(struct tcp_sock *tp) 117static inline void westwood_fast_bw(struct sock *sk)
118{ 118{
119 struct westwood *w = tcp_ca(tp); 119 const struct tcp_sock *tp = tcp_sk(sk);
120 struct westwood *w = inet_csk_ca(sk);
120 121
121 westwood_update_window(tp); 122 westwood_update_window(sk);
122 123
123 w->bk += tp->snd_una - w->snd_una; 124 w->bk += tp->snd_una - w->snd_una;
124 w->snd_una = tp->snd_una; 125 w->snd_una = tp->snd_una;
@@ -130,9 +131,10 @@ static inline void westwood_fast_bw(struct tcp_sock *tp)
130 * This function evaluates cumul_ack for evaluating bk in case of 131 * This function evaluates cumul_ack for evaluating bk in case of
131 * delayed or partial acks. 132 * delayed or partial acks.
132 */ 133 */
133static inline u32 westwood_acked_count(struct tcp_sock *tp) 134static inline u32 westwood_acked_count(struct sock *sk)
134{ 135{
135 struct westwood *w = tcp_ca(tp); 136 const struct tcp_sock *tp = tcp_sk(sk);
137 struct westwood *w = inet_csk_ca(sk);
136 138
137 w->cumul_ack = tp->snd_una - w->snd_una; 139 w->cumul_ack = tp->snd_una - w->snd_una;
138 140
@@ -160,9 +162,10 @@ static inline u32 westwood_acked_count(struct tcp_sock *tp)
160 return w->cumul_ack; 162 return w->cumul_ack;
161} 163}
162 164
163static inline u32 westwood_bw_rttmin(const struct tcp_sock *tp) 165static inline u32 westwood_bw_rttmin(const struct sock *sk)
164{ 166{
165 struct westwood *w = tcp_ca(tp); 167 const struct tcp_sock *tp = tcp_sk(sk);
168 const struct westwood *w = inet_csk_ca(sk);
166 return max_t(u32, (w->bw_est * w->rtt_min) / tp->mss_cache, 2); 169 return max_t(u32, (w->bw_est * w->rtt_min) / tp->mss_cache, 2);
167} 170}
168 171
@@ -172,31 +175,32 @@ static inline u32 westwood_bw_rttmin(const struct tcp_sock *tp)
172 * in packets we use mss_cache). Rttmin is guaranteed to be >= 2 175 * in packets we use mss_cache). Rttmin is guaranteed to be >= 2
173 * so avoids ever returning 0. 176 * so avoids ever returning 0.
174 */ 177 */
175static u32 tcp_westwood_cwnd_min(struct tcp_sock *tp) 178static u32 tcp_westwood_cwnd_min(struct sock *sk)
176{ 179{
177 return westwood_bw_rttmin(tp); 180 return westwood_bw_rttmin(sk);
178} 181}
179 182
180static void tcp_westwood_event(struct tcp_sock *tp, enum tcp_ca_event event) 183static void tcp_westwood_event(struct sock *sk, enum tcp_ca_event event)
181{ 184{
182 struct westwood *w = tcp_ca(tp); 185 struct tcp_sock *tp = tcp_sk(sk);
186 struct westwood *w = inet_csk_ca(sk);
183 187
184 switch(event) { 188 switch(event) {
185 case CA_EVENT_FAST_ACK: 189 case CA_EVENT_FAST_ACK:
186 westwood_fast_bw(tp); 190 westwood_fast_bw(sk);
187 break; 191 break;
188 192
189 case CA_EVENT_COMPLETE_CWR: 193 case CA_EVENT_COMPLETE_CWR:
190 tp->snd_cwnd = tp->snd_ssthresh = westwood_bw_rttmin(tp); 194 tp->snd_cwnd = tp->snd_ssthresh = westwood_bw_rttmin(sk);
191 break; 195 break;
192 196
193 case CA_EVENT_FRTO: 197 case CA_EVENT_FRTO:
194 tp->snd_ssthresh = westwood_bw_rttmin(tp); 198 tp->snd_ssthresh = westwood_bw_rttmin(sk);
195 break; 199 break;
196 200
197 case CA_EVENT_SLOW_ACK: 201 case CA_EVENT_SLOW_ACK:
198 westwood_update_window(tp); 202 westwood_update_window(sk);
199 w->bk += westwood_acked_count(tp); 203 w->bk += westwood_acked_count(sk);
200 w->rtt_min = min(w->rtt, w->rtt_min); 204 w->rtt_min = min(w->rtt, w->rtt_min);
201 break; 205 break;
202 206
@@ -208,10 +212,10 @@ static void tcp_westwood_event(struct tcp_sock *tp, enum tcp_ca_event event)
208 212
209 213
210/* Extract info for Tcp socket info provided via netlink. */ 214/* Extract info for Tcp socket info provided via netlink. */
211static void tcp_westwood_info(struct tcp_sock *tp, u32 ext, 215static void tcp_westwood_info(struct sock *sk, u32 ext,
212 struct sk_buff *skb) 216 struct sk_buff *skb)
213{ 217{
214 const struct westwood *ca = tcp_ca(tp); 218 const struct westwood *ca = inet_csk_ca(sk);
215 if (ext & (1<<(TCPDIAG_VEGASINFO-1))) { 219 if (ext & (1<<(TCPDIAG_VEGASINFO-1))) {
216 struct rtattr *rta; 220 struct rtattr *rta;
217 struct tcpvegas_info *info; 221 struct tcpvegas_info *info;
@@ -242,7 +246,7 @@ static struct tcp_congestion_ops tcp_westwood = {
242 246
243static int __init tcp_westwood_register(void) 247static int __init tcp_westwood_register(void)
244{ 248{
245 BUG_ON(sizeof(struct westwood) > TCP_CA_PRIV_SIZE); 249 BUG_ON(sizeof(struct westwood) > ICSK_CA_PRIV_SIZE);
246 return tcp_register_congestion_control(&tcp_westwood); 250 return tcp_register_congestion_control(&tcp_westwood);
247} 251}
248 252
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 08c55b024704..3312cb8742e2 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2010,13 +2010,14 @@ static struct tcp_func ipv6_mapped = {
2010 */ 2010 */
2011static int tcp_v6_init_sock(struct sock *sk) 2011static int tcp_v6_init_sock(struct sock *sk)
2012{ 2012{
2013 struct inet_connection_sock *icsk = inet_csk(sk);
2013 struct tcp_sock *tp = tcp_sk(sk); 2014 struct tcp_sock *tp = tcp_sk(sk);
2014 2015
2015 skb_queue_head_init(&tp->out_of_order_queue); 2016 skb_queue_head_init(&tp->out_of_order_queue);
2016 tcp_init_xmit_timers(sk); 2017 tcp_init_xmit_timers(sk);
2017 tcp_prequeue_init(tp); 2018 tcp_prequeue_init(tp);
2018 2019
2019 inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT; 2020 icsk->icsk_rto = TCP_TIMEOUT_INIT;
2020 tp->mdev = TCP_TIMEOUT_INIT; 2021 tp->mdev = TCP_TIMEOUT_INIT;
2021 2022
2022 /* So many TCP implementations out there (incorrectly) count the 2023 /* So many TCP implementations out there (incorrectly) count the
@@ -2038,7 +2039,7 @@ static int tcp_v6_init_sock(struct sock *sk)
2038 sk->sk_state = TCP_CLOSE; 2039 sk->sk_state = TCP_CLOSE;
2039 2040
2040 tp->af_specific = &ipv6_specific; 2041 tp->af_specific = &ipv6_specific;
2041 tp->ca_ops = &tcp_init_congestion_ops; 2042 icsk->icsk_ca_ops = &tcp_init_congestion_ops;
2042 sk->sk_write_space = sk_stream_write_space; 2043 sk->sk_write_space = sk_stream_write_space;
2043 sock_set_flag(sk, SOCK_USE_WRITE_QUEUE); 2044 sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
2044 2045
@@ -2135,7 +2136,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
2135 jiffies_to_clock_t(timer_expires - jiffies), 2136 jiffies_to_clock_t(timer_expires - jiffies),
2136 icsk->icsk_retransmits, 2137 icsk->icsk_retransmits,
2137 sock_i_uid(sp), 2138 sock_i_uid(sp),
2138 tp->probes_out, 2139 icsk->icsk_probes_out,
2139 sock_i_ino(sp), 2140 sock_i_ino(sp),
2140 atomic_read(&sp->sk_refcnt), sp, 2141 atomic_read(&sp->sk_refcnt), sp,
2141 icsk->icsk_rto, 2142 icsk->icsk_rto,
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-04 11:35:42 -0400