From 463c84b97f24010a67cd871746d6a7e4c925a5f9 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 9 Aug 2005 20:10:42 -0700 Subject: [NET]: Introduce inet_connection_sock This creates struct inet_connection_sock, moving members out of struct tcp_sock that are shareable with other INET connection oriented protocols, such as DCCP, that in my private tree already uses most of these members. The functions that operate on these members were renamed, using a inet_csk_ prefix while not being moved yet to a new file, so as to ease the review of these changes. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 86 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 include/net/inet_connection_sock.h (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h new file mode 100644 index 000000000000..ef609396e41b --- /dev/null +++ b/include/net/inet_connection_sock.h @@ -0,0 +1,86 @@ +/* + * NET Generic infrastructure for INET connection oriented protocols. + * + * Definitions for inet_connection_sock + * + * Authors: Many people, see the TCP sources + * + * From code originally in TCP + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#ifndef _INET_CONNECTION_SOCK_H +#define _INET_CONNECTION_SOCK_H + +#include +#include +#include + +struct inet_bind_bucket; +struct inet_hashinfo; + +/** inet_connection_sock - INET connection oriented sock + * + * @icsk_accept_queue: FIFO of established children + * @icsk_bind_hash: Bind node + * @icsk_timeout: Timeout + * @icsk_retransmit_timer: Resend (no ack) + * @icsk_rto: Retransmit timeout + * @icsk_retransmits: Number of unrecovered [RTO] timeouts + * @icsk_pending: Scheduled timer event + * @icsk_backoff: Backoff + * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries + * @icsk_ack: Delayed ACK control data + */ +struct inet_connection_sock { + /* inet_sock has to be the first member! */ + struct inet_sock icsk_inet; + struct request_sock_queue icsk_accept_queue; + struct inet_bind_bucket *icsk_bind_hash; + unsigned long icsk_timeout; + struct timer_list icsk_retransmit_timer; + struct timer_list icsk_delack_timer; + __u32 icsk_rto; + __u8 icsk_retransmits; + __u8 icsk_pending; + __u8 icsk_backoff; + __u8 icsk_syn_retries; + struct { + __u8 pending; /* ACK is pending */ + __u8 quick; /* Scheduled number of quick acks */ + __u8 pingpong; /* The session is interactive */ + __u8 blocked; /* Delayed ACK was blocked by socket lock */ + __u32 ato; /* Predicted tick of soft clock */ + unsigned long timeout; /* Currently scheduled timeout */ + __u32 lrcvtime; /* timestamp of last received data packet */ + __u16 last_seg_size; /* Size of last incoming segment */ + __u16 rcv_mss; /* MSS used for delayed ACK decisions */ + } icsk_ack; +}; + +static inline struct inet_connection_sock *inet_csk(const struct sock *sk) +{ + return (struct inet_connection_sock *)sk; +} + +extern void inet_csk_init_xmit_timers(struct sock *sk, + void (*retransmit_handler)(unsigned long), + void (*delack_handler)(unsigned long), + void (*keepalive_handler)(unsigned long)); +extern void inet_csk_clear_xmit_timers(struct sock *sk); + +extern struct request_sock *inet_csk_search_req(const struct sock *sk, + struct request_sock ***prevp, + const __u16 rport, + const __u32 raddr, + const __u32 laddr); +extern int inet_csk_get_port(struct inet_hashinfo *hashinfo, + struct sock *sk, unsigned short snum); + +extern struct dst_entry* inet_csk_route_req(struct sock *sk, + const struct request_sock *req); + +#endif /* _INET_CONNECTION_SOCK_H */ -- cgit v1.2.2 From 3f421baa4720b708022f8bcc52a61e5cd6f10bf8 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 9 Aug 2005 20:11:08 -0700 Subject: [NET]: Just move the inet_connection_sock function from tcp sources Completing the previous changeset, this also generalises tcp_v4_synq_add, renaming it to inet_csk_reqsk_queue_hash_add, already geing used in the DCCP tree, which I plan to merge RSN. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 152 +++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index ef609396e41b..97e002001c1a 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -16,9 +16,15 @@ #define _INET_CONNECTION_SOCK_H #include +#include #include #include +#define INET_CSK_DEBUG 1 + +/* Cancel timers, when they are not required. */ +#undef INET_CSK_CLEAR_TIMERS + struct inet_bind_bucket; struct inet_hashinfo; @@ -61,17 +67,107 @@ struct inet_connection_sock { } icsk_ack; }; +#define ICSK_TIME_RETRANS 1 /* Retransmit timer */ +#define ICSK_TIME_DACK 2 /* Delayed ack timer */ +#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */ +#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */ + static inline struct inet_connection_sock *inet_csk(const struct sock *sk) { return (struct inet_connection_sock *)sk; } +enum inet_csk_ack_state_t { + ICSK_ACK_SCHED = 1, + ICSK_ACK_TIMER = 2, + ICSK_ACK_PUSHED = 4 +}; + extern void inet_csk_init_xmit_timers(struct sock *sk, void (*retransmit_handler)(unsigned long), void (*delack_handler)(unsigned long), void (*keepalive_handler)(unsigned long)); extern void inet_csk_clear_xmit_timers(struct sock *sk); +static inline void inet_csk_schedule_ack(struct sock *sk) +{ + inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED; +} + +static inline int inet_csk_ack_scheduled(const struct sock *sk) +{ + return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED; +} + +static inline void inet_csk_delack_init(struct sock *sk) +{ + memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack)); +} + +extern void inet_csk_delete_keepalive_timer(struct sock *sk); +extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout); + +#ifdef INET_CSK_DEBUG +extern const char inet_csk_timer_bug_msg[]; +#endif + +static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + + if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) { + icsk->icsk_pending = 0; +#ifdef INET_CSK_CLEAR_TIMERS + sk_stop_timer(sk, &icsk->icsk_retransmit_timer); +#endif + } else if (what == ICSK_TIME_DACK) { + icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0; +#ifdef INET_CSK_CLEAR_TIMERS + sk_stop_timer(sk, &icsk->icsk_delack_timer); +#endif + } +#ifdef INET_CSK_DEBUG + else { + pr_debug(inet_csk_timer_bug_msg); + } +#endif +} + +/* + * Reset the retransmission timer + */ +static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what, + unsigned long when, + const unsigned long max_when) +{ + struct inet_connection_sock *icsk = inet_csk(sk); + + if (when > max_when) { +#ifdef INET_CSK_DEBUG + pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n", + sk, what, when, current_text_addr()); +#endif + when = max_when; + } + + if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) { + icsk->icsk_pending = what; + icsk->icsk_timeout = jiffies + when; + sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); + } else if (what == ICSK_TIME_DACK) { + icsk->icsk_ack.pending |= ICSK_ACK_TIMER; + icsk->icsk_ack.timeout = jiffies + when; + sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout); + } +#ifdef INET_CSK_DEBUG + else { + pr_debug(inet_csk_timer_bug_msg); + } +#endif +} + +extern struct sock *inet_csk_accept(struct sock *sk, int flags, int *err); + extern struct request_sock *inet_csk_search_req(const struct sock *sk, struct request_sock ***prevp, const __u16 rport, @@ -83,4 +179,60 @@ extern int inet_csk_get_port(struct inet_hashinfo *hashinfo, extern struct dst_entry* inet_csk_route_req(struct sock *sk, const struct request_sock *req); +static inline void inet_csk_reqsk_queue_add(struct sock *sk, + struct request_sock *req, + struct sock *child) +{ + reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child); +} + +extern void inet_csk_reqsk_queue_hash_add(struct sock *sk, + struct request_sock *req, + const unsigned timeout); + +static inline void inet_csk_reqsk_queue_removed(struct sock *sk, + struct request_sock *req) +{ + if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0) + inet_csk_delete_keepalive_timer(sk); +} + +static inline void inet_csk_reqsk_queue_added(struct sock *sk, + const unsigned long timeout) +{ + if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0) + inet_csk_reset_keepalive_timer(sk, timeout); +} + +static inline int inet_csk_reqsk_queue_len(const struct sock *sk) +{ + return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue); +} + +static inline int inet_csk_reqsk_queue_young(const struct sock *sk) +{ + return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue); +} + +static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk) +{ + return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue); +} + +static inline void inet_csk_reqsk_queue_unlink(struct sock *sk, + struct request_sock *req, + struct request_sock **prev) +{ + reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev); +} + +static inline void inet_csk_reqsk_queue_drop(struct sock *sk, + struct request_sock *req, + struct request_sock **prev) +{ + inet_csk_reqsk_queue_unlink(sk, req, prev); + inet_csk_reqsk_queue_removed(sk, req); + reqsk_free(req); +} + #endif /* _INET_CONNECTION_SOCK_H */ -- cgit v1.2.2 From 9f1d2604c71498579609b1532fedc5a89276bb00 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 9 Aug 2005 20:11:24 -0700 Subject: [ICSK]: Introduce inet_csk_clone Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index 97e002001c1a..a50f4a4b7b4b 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -77,6 +77,10 @@ static inline struct inet_connection_sock *inet_csk(const struct sock *sk) return (struct inet_connection_sock *)sk; } +extern struct sock *inet_csk_clone(struct sock *sk, + const struct request_sock *req, + const unsigned int __nocast priority); + enum inet_csk_ack_state_t { ICSK_ACK_SCHED = 1, ICSK_ACK_TIMER = 2, -- cgit v1.2.2 From 295f7324ff8d9ea58b4d3ec93b1aaa1d80e048a9 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 9 Aug 2005 20:11:56 -0700 Subject: [ICSK]: Introduce reqsk_queue_prune from code in tcp_synack_timer With this we're very close to getting all of the current TCP refactorings in my dccp-2.6 tree merged, next changeset will export some functions needed by the current DCCP code and then dccp-2.6.git will be born! Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index a50f4a4b7b4b..692825fc8135 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -239,4 +239,6 @@ static inline void inet_csk_reqsk_queue_drop(struct sock *sk, reqsk_free(req); } +extern void inet_csk_listen_stop(struct sock *sk); + #endif /* _INET_CONNECTION_SOCK_H */ -- cgit v1.2.2 From a019d6fe2b9da68ea4ba6cf3c4e86fc1dbf554c3 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 9 Aug 2005 20:15:09 -0700 Subject: [ICSK]: Move generalised functions from tcp to inet_connection_sock This also improves reqsk_queue_prune and renames it to inet_csk_reqsk_queue_prune, as it deals with both inet_connection_sock and inet_request_sock objects, not just with request_sock ones thus belonging to inet_request_sock. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index 692825fc8135..bec19d5cff26 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -239,6 +239,13 @@ static inline void inet_csk_reqsk_queue_drop(struct sock *sk, reqsk_free(req); } +extern void inet_csk_reqsk_queue_prune(struct sock *parent, + const unsigned long interval, + const unsigned long timeout, + const unsigned long max_rto); + +extern void inet_csk_destroy_sock(struct sock *sk); +extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries); extern void inet_csk_listen_stop(struct sock *sk); #endif /* _INET_CONNECTION_SOCK_H */ -- cgit v1.2.2 From 6687e988d9aeaccad6774e6a8304f681f3ec0a03 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 10 Aug 2005 04:03:31 -0300 Subject: [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 Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/net/inet_connection_sock.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 @@ struct inet_bind_bucket; struct inet_hashinfo; +struct tcp_congestion_ops; /** inet_connection_sock - INET connection oriented sock * @@ -35,10 +36,13 @@ struct inet_hashinfo; * @icsk_timeout: Timeout * @icsk_retransmit_timer: Resend (no ack) * @icsk_rto: Retransmit timeout + * @icsk_ca_ops Pluggable congestion control hook + * @icsk_ca_state: Congestion control state * @icsk_retransmits: Number of unrecovered [RTO] timeouts * @icsk_pending: Scheduled timer event * @icsk_backoff: Backoff * @icsk_syn_retries: Number of allowed SYN (or equivalent) retries + * @icsk_probes_out: unanswered 0 window probes * @icsk_ack: Delayed ACK control data */ struct inet_connection_sock { @@ -50,10 +54,14 @@ struct inet_connection_sock { struct timer_list icsk_retransmit_timer; struct timer_list icsk_delack_timer; __u32 icsk_rto; + struct tcp_congestion_ops *icsk_ca_ops; + __u8 icsk_ca_state; __u8 icsk_retransmits; __u8 icsk_pending; __u8 icsk_backoff; __u8 icsk_syn_retries; + __u8 icsk_probes_out; + /* 2 BYTES HOLE, TRY TO PACK! */ struct { __u8 pending; /* ACK is pending */ __u8 quick; /* Scheduled number of quick acks */ @@ -65,6 +73,8 @@ struct inet_connection_sock { __u16 last_seg_size; /* Size of last incoming segment */ __u16 rcv_mss; /* MSS used for delayed ACK decisions */ } icsk_ack; + u32 icsk_ca_priv[16]; +#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32)) }; #define ICSK_TIME_RETRANS 1 /* Retransmit timer */ @@ -77,6 +87,11 @@ static inline struct inet_connection_sock *inet_csk(const struct sock *sk) return (struct inet_connection_sock *)sk; } +static inline void *inet_csk_ca(const struct sock *sk) +{ + return (void *)inet_csk(sk)->icsk_ca_priv; +} + extern struct sock *inet_csk_clone(struct sock *sk, const struct request_sock *req, const unsigned int __nocast priority); -- cgit v1.2.2 From dc40c7bc76054f5e4382835ca2bafb895b993a8a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 23 Aug 2005 21:52:58 -0700 Subject: [ICSK]: Generalise tcp_listen_poll Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index 4d7e708c07d1..8a87a3a4f107 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -260,6 +260,16 @@ extern void inet_csk_reqsk_queue_prune(struct sock *parent, const unsigned long max_rto); extern void inet_csk_destroy_sock(struct sock *sk); + +/* + * LISTEN is a special case for poll.. + */ +static inline unsigned int inet_csk_listen_poll(const struct sock *sk) +{ + return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ? + (POLLIN | POLLRDNORM) : 0; +} + extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries); extern void inet_csk_listen_stop(struct sock *sk); -- cgit v1.2.2 From d8971fcb702e24d1e22c77fd1772f182ffee87e3 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 29 Aug 2005 22:51:28 -0700 Subject: [INET]: compile errors when DEBUG is defined Fix build problem found by compiling driver with DEBUG defined that used tcp.h. Since pr_debug(arg) expands to printk("<7>" arg) the argument needs to be string that can be concatenated. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- include/net/inet_connection_sock.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/net/inet_connection_sock.h') diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index 8a87a3a4f107..651f824c1008 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -147,7 +147,7 @@ static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what) } #ifdef INET_CSK_DEBUG else { - pr_debug(inet_csk_timer_bug_msg); + pr_debug("%s", inet_csk_timer_bug_msg); } #endif } @@ -180,7 +180,7 @@ static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what, } #ifdef INET_CSK_DEBUG else { - pr_debug(inet_csk_timer_bug_msg); + pr_debug("%s", inet_csk_timer_bug_msg); } #endif } -- cgit v1.2.2