diff options
Diffstat (limited to 'include/net')
40 files changed, 1462 insertions, 694 deletions
diff --git a/include/net/act_api.h b/include/net/act_api.h index ed00a995f57..b55eb7c7f03 100644 --- a/include/net/act_api.h +++ b/include/net/act_api.h @@ -63,7 +63,7 @@ struct tc_action_ops __u32 type; /* TBD to match kind */ __u32 capab; /* capabilities includes 4 bit version */ struct module *owner; - int (*act)(struct sk_buff **, struct tc_action *); + int (*act)(struct sk_buff **, struct tc_action *, struct tcf_result *); int (*get_stats)(struct sk_buff *, struct tc_action *); int (*dump)(struct sk_buff *, struct tc_action *,int , int); int (*cleanup)(struct tc_action *, int bind); diff --git a/include/net/addrconf.h b/include/net/addrconf.h index a0ed9367217..750e2508dd9 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -45,6 +45,7 @@ struct prefix_info { #ifdef __KERNEL__ +#include <linux/config.h> #include <linux/netdevice.h> #include <net/if_inet6.h> #include <net/ipv6.h> @@ -238,5 +239,10 @@ static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) addr->s6_addr32[3] == htonl(0x00000002)); } +#ifdef CONFIG_PROC_FS +extern int if6_proc_init(void); +extern void if6_proc_exit(void); +#endif + #endif #endif diff --git a/include/net/af_unix.h b/include/net/af_unix.h index b60b3846b9d..b5d785ab4a0 100644 --- a/include/net/af_unix.h +++ b/include/net/af_unix.h @@ -1,5 +1,11 @@ #ifndef __LINUX_NET_AFUNIX_H #define __LINUX_NET_AFUNIX_H + +#include <linux/config.h> +#include <linux/socket.h> +#include <linux/un.h> +#include <net/sock.h> + extern void unix_inflight(struct file *fp); extern void unix_notinflight(struct file *fp); extern void unix_gc(void); @@ -74,5 +80,14 @@ struct unix_sock { wait_queue_head_t peer_wait; }; #define unix_sk(__sk) ((struct unix_sock *)__sk) + +#ifdef CONFIG_SYSCTL +extern int sysctl_unix_max_dgram_qlen; +extern void unix_sysctl_register(void); +extern void unix_sysctl_unregister(void); +#else +static inline void unix_sysctl_register(void) {} +static inline void unix_sysctl_unregister(void) {} +#endif #endif #endif diff --git a/include/net/arp.h b/include/net/arp.h index a1f09fad6a5..a13e30c35f4 100644 --- a/include/net/arp.h +++ b/include/net/arp.h @@ -11,7 +11,7 @@ extern struct neigh_table arp_tbl; extern void arp_init(void); extern int arp_rcv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *pt); + struct packet_type *pt, struct net_device *orig_dev); extern int arp_find(unsigned char *haddr, struct sk_buff *skb); extern int arp_ioctl(unsigned int cmd, void __user *arg); extern void arp_send(int type, int ptype, u32 dest_ip, diff --git a/include/net/ax25.h b/include/net/ax25.h index 3696f988a9f..926eed54302 100644 --- a/include/net/ax25.h +++ b/include/net/ax25.h @@ -316,7 +316,7 @@ extern int ax25_protocol_is_registered(unsigned int); /* ax25_in.c */ extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *); -extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *); +extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); /* ax25_ip.c */ extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int); diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h index 06b24f63702..6dfa4a61ffd 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -131,11 +131,12 @@ struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); /* Skb helpers */ struct bt_skb_cb { - int incoming; + __u8 pkt_type; + __u8 incoming; }; #define bt_cb(skb) ((struct bt_skb_cb *)(skb->cb)) -static inline struct sk_buff *bt_skb_alloc(unsigned int len, int how) +static inline struct sk_buff *bt_skb_alloc(unsigned int len, unsigned int __nocast how) { struct sk_buff *skb; diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 6f0706f4af6..371e7d3f2e6 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -453,6 +453,15 @@ struct inquiry_info_with_rssi { __u16 clock_offset; __s8 rssi; } __attribute__ ((packed)); +struct inquiry_info_with_rssi_and_pscan_mode { + bdaddr_t bdaddr; + __u8 pscan_rep_mode; + __u8 pscan_period_mode; + __u8 pscan_mode; + __u8 dev_class[3]; + __u16 clock_offset; + __s8 rssi; +} __attribute__ ((packed)); #define HCI_EV_CONN_COMPLETE 0x03 struct hci_ev_conn_complete { @@ -584,6 +593,12 @@ struct hci_ev_clock_offset { __u16 clock_offset; } __attribute__ ((packed)); +#define HCI_EV_PSCAN_REP_MODE 0x20 +struct hci_ev_pscan_rep_mode { + bdaddr_t bdaddr; + __u8 pscan_rep_mode; +} __attribute__ ((packed)); + /* Internal events generated by Bluetooth stack */ #define HCI_EV_STACK_INTERNAL 0xFD struct hci_ev_stack_internal { diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 6d63a47c731..7f933f30207 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -404,7 +404,7 @@ static inline int hci_recv_frame(struct sk_buff *skb) bt_cb(skb)->incoming = 1; /* Time stamp */ - do_gettimeofday(&skb->stamp); + __net_timestamp(skb); /* Queue frame for rx task */ skb_queue_tail(&hdev->rx_q, skb); diff --git a/include/net/bluetooth/rfcomm.h b/include/net/bluetooth/rfcomm.h index 13669bad00b..ffea9d54071 100644 --- a/include/net/bluetooth/rfcomm.h +++ b/include/net/bluetooth/rfcomm.h @@ -80,9 +80,9 @@ #define RFCOMM_RPN_STOP_15 1 #define RFCOMM_RPN_PARITY_NONE 0x0 -#define RFCOMM_RPN_PARITY_ODD 0x4 -#define RFCOMM_RPN_PARITY_EVEN 0x5 -#define RFCOMM_RPN_PARITY_MARK 0x6 +#define RFCOMM_RPN_PARITY_ODD 0x1 +#define RFCOMM_RPN_PARITY_EVEN 0x3 +#define RFCOMM_RPN_PARITY_MARK 0x5 #define RFCOMM_RPN_PARITY_SPACE 0x7 #define RFCOMM_RPN_FLOW_NONE 0x00 @@ -223,8 +223,14 @@ struct rfcomm_dlc { #define RFCOMM_CFC_DISABLED 0 #define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS +/* ---- RFCOMM SEND RPN ---- */ +int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, + u8 bit_rate, u8 data_bits, u8 stop_bits, + u8 parity, u8 flow_ctrl_settings, + u8 xon_char, u8 xoff_char, u16 param_mask); + /* ---- RFCOMM DLCs (channels) ---- */ -struct rfcomm_dlc *rfcomm_dlc_alloc(int prio); +struct rfcomm_dlc *rfcomm_dlc_alloc(unsigned int __nocast prio); void rfcomm_dlc_free(struct rfcomm_dlc *d); int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel); int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason); diff --git a/include/net/datalink.h b/include/net/datalink.h index 5797ba3d2eb..deb7ca75db4 100644 --- a/include/net/datalink.h +++ b/include/net/datalink.h @@ -9,7 +9,7 @@ struct datalink_proto { unsigned short header_length; int (*rcvfunc)(struct sk_buff *, struct net_device *, - struct packet_type *); + struct packet_type *, struct net_device *); int (*request)(struct datalink_proto *, struct sk_buff *, unsigned char *); struct list_head node; diff --git a/include/net/dn.h b/include/net/dn.h index 5551c46db39..c1dbbd22279 100644 --- a/include/net/dn.h +++ b/include/net/dn.h @@ -3,6 +3,7 @@ #include <linux/dn.h> #include <net/sock.h> +#include <net/tcp.h> #include <asm/byteorder.h> typedef unsigned short dn_address; diff --git a/include/net/icmp.h b/include/net/icmp.h index e5ef0d15fb4..6cdebeee5f9 100644 --- a/include/net/icmp.h +++ b/include/net/icmp.h @@ -57,4 +57,11 @@ static inline struct raw_sock *raw_sk(const struct sock *sk) return (struct raw_sock *)sk; } +extern int sysctl_icmp_echo_ignore_all; +extern int sysctl_icmp_echo_ignore_broadcasts; +extern int sysctl_icmp_ignore_bogus_error_responses; +extern int sysctl_icmp_errors_use_inbound_ifaddr; +extern int sysctl_icmp_ratelimit; +extern int sysctl_icmp_ratemask; + #endif /* _ICMP_H */ diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h new file mode 100644 index 00000000000..03df3b15796 --- /dev/null +++ b/include/net/inet6_hashtables.h @@ -0,0 +1,130 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Authors: Lotsa people, 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 _INET6_HASHTABLES_H +#define _INET6_HASHTABLES_H + +#include <linux/config.h> + +#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) +#include <linux/in6.h> +#include <linux/ipv6.h> +#include <linux/types.h> + +#include <net/ipv6.h> + +struct inet_hashinfo; + +/* I have no idea if this is a good hash for v6 or not. -DaveM */ +static inline int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport, + const struct in6_addr *faddr, const u16 fport, + const int ehash_size) +{ + int hashent = (lport ^ fport); + + hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]); + hashent ^= hashent >> 16; + hashent ^= hashent >> 8; + return (hashent & (ehash_size - 1)); +} + +static inline int inet6_sk_ehashfn(const struct sock *sk, const int ehash_size) +{ + const struct inet_sock *inet = inet_sk(sk); + const struct ipv6_pinfo *np = inet6_sk(sk); + const struct in6_addr *laddr = &np->rcv_saddr; + const struct in6_addr *faddr = &np->daddr; + const __u16 lport = inet->num; + const __u16 fport = inet->dport; + return inet6_ehashfn(laddr, lport, faddr, fport, ehash_size); +} + +/* + * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so + * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM + * + * The sockhash lock must be held as a reader here. + */ +static inline struct sock * + __inet6_lookup_established(struct inet_hashinfo *hashinfo, + const struct in6_addr *saddr, + const u16 sport, + const struct in6_addr *daddr, + const u16 hnum, + const int dif) +{ + struct sock *sk; + const struct hlist_node *node; + const __u32 ports = INET_COMBINED_PORTS(sport, hnum); + /* Optimize here for direct hit, only listening connections can + * have wildcards anyways. + */ + const int hash = inet6_ehashfn(daddr, hnum, saddr, sport, + hashinfo->ehash_size); + struct inet_ehash_bucket *head = &hashinfo->ehash[hash]; + + read_lock(&head->lock); + sk_for_each(sk, node, &head->chain) { + /* For IPV6 do the cheaper port and family tests first. */ + if (INET6_MATCH(sk, saddr, daddr, ports, dif)) + goto hit; /* You sunk my battleship! */ + } + /* Must check for a TIME_WAIT'er before going to listener hash. */ + sk_for_each(sk, node, &(head + hashinfo->ehash_size)->chain) { + const struct inet_timewait_sock *tw = inet_twsk(sk); + + if(*((__u32 *)&(tw->tw_dport)) == ports && + sk->sk_family == PF_INET6) { + const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk); + + if (ipv6_addr_equal(&tcp6tw->tw_v6_daddr, saddr) && + ipv6_addr_equal(&tcp6tw->tw_v6_rcv_saddr, daddr) && + (!sk->sk_bound_dev_if || sk->sk_bound_dev_if == dif)) + goto hit; + } + } + read_unlock(&head->lock); + return NULL; + +hit: + sock_hold(sk); + read_unlock(&head->lock); + return sk; +} + +extern struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo, + const struct in6_addr *daddr, + const unsigned short hnum, + const int dif); + +static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo, + const struct in6_addr *saddr, + const u16 sport, + const struct in6_addr *daddr, + const u16 hnum, + const int dif) +{ + struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport, + daddr, hnum, dif); + if (sk) + return sk; + + return inet6_lookup_listener(hashinfo, daddr, hnum, dif); +} + +extern struct sock *inet6_lookup(struct inet_hashinfo *hashinfo, + const struct in6_addr *saddr, const u16 sport, + const struct in6_addr *daddr, const u16 dport, + const int dif); +#endif /* defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) */ +#endif /* _INET6_HASHTABLES_H */ diff --git a/include/net/inet_common.h b/include/net/inet_common.h index fbc1f4d140d..f943306ce5f 100644 --- a/include/net/inet_common.h +++ b/include/net/inet_common.h @@ -8,6 +8,11 @@ extern struct proto_ops inet_dgram_ops; * INET4 prototypes used by INET6 */ +struct msghdr; +struct sock; +struct sockaddr; +struct socket; + extern void inet_remove_sock(struct sock *sk1); extern void inet_put_sock(unsigned short num, struct sock *sk); @@ -29,7 +34,6 @@ extern unsigned int inet_poll(struct file * file, struct socket *sock, struct p extern int inet_listen(struct socket *sock, int backlog); extern void inet_sock_destruct(struct sock *sk); -extern atomic_t inet_sock_nr; extern int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len); diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h new file mode 100644 index 00000000000..651f824c100 --- /dev/null +++ b/include/net/inet_connection_sock.h @@ -0,0 +1,276 @@ +/* + * 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 <linux/ip.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <net/request_sock.h> + +#define INET_CSK_DEBUG 1 + +/* Cancel timers, when they are not required. */ +#undef INET_CSK_CLEAR_TIMERS + +struct inet_bind_bucket; +struct inet_hashinfo; +struct tcp_congestion_ops; + +/** 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_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 { + /* 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; + 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 */ + __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; + u32 icsk_ca_priv[16]; +#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32)) +}; + +#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; +} + +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); + +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("%s", 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("%s", 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, + 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); + +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); +} + +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); + +/* + * 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); + +#endif /* _INET_CONNECTION_SOCK_H */ diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h new file mode 100644 index 00000000000..646b6ea7fe2 --- /dev/null +++ b/include/net/inet_hashtables.h @@ -0,0 +1,427 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Authors: Lotsa people, 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_HASHTABLES_H +#define _INET_HASHTABLES_H + +#include <linux/config.h> + +#include <linux/interrupt.h> +#include <linux/ipv6.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/socket.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/wait.h> + +#include <net/inet_connection_sock.h> +#include <net/route.h> +#include <net/sock.h> +#include <net/tcp_states.h> + +#include <asm/atomic.h> +#include <asm/byteorder.h> + +/* This is for all connections with a full identity, no wildcards. + * New scheme, half the table is for TIME_WAIT, the other half is + * for the rest. I'll experiment with dynamic table growth later. + */ +struct inet_ehash_bucket { + rwlock_t lock; + struct hlist_head chain; +} __attribute__((__aligned__(8))); + +/* There are a few simple rules, which allow for local port reuse by + * an application. In essence: + * + * 1) Sockets bound to different interfaces may share a local port. + * Failing that, goto test 2. + * 2) If all sockets have sk->sk_reuse set, and none of them are in + * TCP_LISTEN state, the port may be shared. + * Failing that, goto test 3. + * 3) If all sockets are bound to a specific inet_sk(sk)->rcv_saddr local + * address, and none of them are the same, the port may be + * shared. + * Failing this, the port cannot be shared. + * + * The interesting point, is test #2. This is what an FTP server does + * all day. To optimize this case we use a specific flag bit defined + * below. As we add sockets to a bind bucket list, we perform a + * check of: (newsk->sk_reuse && (newsk->sk_state != TCP_LISTEN)) + * As long as all sockets added to a bind bucket pass this test, + * the flag bit will be set. + * The resulting situation is that tcp_v[46]_verify_bind() can just check + * for this flag bit, if it is set and the socket trying to bind has + * sk->sk_reuse set, we don't even have to walk the owners list at all, + * we return that it is ok to bind this socket to the requested local port. + * + * Sounds like a lot of work, but it is worth it. In a more naive + * implementation (ie. current FreeBSD etc.) the entire list of ports + * must be walked for each data port opened by an ftp server. Needless + * to say, this does not scale at all. With a coup |