cregit-Linux how code gets into the kernel

Release 4.12 include/linux/ipv6.h

Directory: include/linux
#ifndef _IPV6_H

#define _IPV6_H

#include <uapi/linux/ipv6.h>


#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)

#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
/*
 * This structure contains configuration options per IPv6 link.
 */

struct ipv6_devconf {
	
__s32		forwarding;
	
__s32		hop_limit;
	
__s32		mtu6;
	
__s32		accept_ra;
	
__s32		accept_redirects;
	
__s32		autoconf;
	
__s32		dad_transmits;
	
__s32		rtr_solicits;
	
__s32		rtr_solicit_interval;
	
__s32		rtr_solicit_max_interval;
	
__s32		rtr_solicit_delay;
	
__s32		force_mld_version;
	
__s32		mldv1_unsolicited_report_interval;
	
__s32		mldv2_unsolicited_report_interval;
	
__s32		use_tempaddr;
	
__s32		temp_valid_lft;
	
__s32		temp_prefered_lft;
	
__s32		regen_max_retry;
	
__s32		max_desync_factor;
	
__s32		max_addresses;
	
__s32		accept_ra_defrtr;
	
__s32		accept_ra_min_hop_limit;
	
__s32		accept_ra_pinfo;
	
__s32		ignore_routes_with_linkdown;
#ifdef CONFIG_IPV6_ROUTER_PREF
	
__s32		accept_ra_rtr_pref;
	
__s32		rtr_probe_interval;
#ifdef CONFIG_IPV6_ROUTE_INFO
	
__s32		accept_ra_rt_info_min_plen;
	
__s32		accept_ra_rt_info_max_plen;
#endif
#endif
	
__s32		proxy_ndp;
	
__s32		accept_source_route;
	
__s32		accept_ra_from_local;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	
__s32		optimistic_dad;
	
__s32		use_optimistic;
#endif
#ifdef CONFIG_IPV6_MROUTE
	
__s32		mc_forwarding;
#endif
	
__s32		disable_ipv6;
	
__s32		drop_unicast_in_l2_multicast;
	
__s32		accept_dad;
	
__s32		force_tllao;
	
__s32           ndisc_notify;
	
__s32		suppress_frag_ndisc;
	
__s32		accept_ra_mtu;
	
__s32		drop_unsolicited_na;
	
struct ipv6_stable_secret {
		
bool initialized;
		
struct in6_addr secret;
	
} stable_secret;
	
__s32		use_oif_addrs_only;
	
__s32		keep_addr_on_down;
	
__s32		seg6_enabled;
#ifdef CONFIG_IPV6_SEG6_HMAC
	
__s32		seg6_require_hmac;
#endif
	
__u32		enhanced_dad;
	
__u32		addr_gen_mode;
	
__s32		disable_policy;

	
struct ctl_table_header *sysctl_header;
};


struct ipv6_params {
	
__s32 disable_ipv6;
	
__s32 autoconf;
};
extern struct ipv6_params ipv6_defaults;
#include <linux/icmpv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>

#include <net/inet_sock.h>


static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) { return (struct ipv6hdr *)skb_network_header(skb); }

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static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb) { return (struct ipv6hdr *)skb_inner_network_header(skb); }

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static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb) { return (struct ipv6hdr *)skb_transport_header(skb); }

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/* This structure contains results of exthdrs parsing as offsets from skb->nh. */ struct inet6_skb_parm { int iif; __be16 ra; __u16 dst0; __u16 srcrt; __u16 dst1; __u16 lastopt; __u16 nhoff; __u16 flags; #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) __u16 dsthao; #endif __u16 frag_max_size; #define IP6SKB_XFRM_TRANSFORMED 1 #define IP6SKB_FORWARDED 2 #define IP6SKB_REROUTED 4 #define IP6SKB_ROUTERALERT 8 #define IP6SKB_FRAGMENTED 16 #define IP6SKB_HOPBYHOP 32 #define IP6SKB_L3SLAVE 64 }; #if defined(CONFIG_NET_L3_MASTER_DEV)
static inline bool ipv6_l3mdev_skb(__u16 flags) { return flags & IP6SKB_L3SLAVE; }

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#else
static inline bool ipv6_l3mdev_skb(__u16 flags) { return false; }

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#endif #define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) #define IP6CBMTU(skb) ((struct ip6_mtuinfo *)((skb)->cb))
static inline int inet6_iif(const struct sk_buff *skb) { bool l3_slave = ipv6_l3mdev_skb(IP6CB(skb)->flags); return l3_slave ? skb->skb_iif : IP6CB(skb)->iif; }

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Arnaldo Carvalho de Melo2152.50%133.33%
David Ahern1947.50%266.67%
Total40100.00%3100.00%

/* can not be used in TCP layer after tcp_v6_fill_cb */
static inline bool inet6_exact_dif_match(struct net *net, struct sk_buff *skb) { #if defined(CONFIG_NET_L3_MASTER_DEV) if (!net->ipv4.sysctl_tcp_l3mdev_accept && skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) return true; #endif return false; }

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David Ahern52100.00%2100.00%
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struct tcp6_request_sock { struct tcp_request_sock tcp6rsk_tcp; }; struct ipv6_mc_socklist; struct ipv6_ac_socklist; struct ipv6_fl_socklist; struct inet6_cork { struct ipv6_txoptions *opt; u8 hop_limit; u8 tclass; }; /** * struct ipv6_pinfo - ipv6 private area * * In the struct sock hierarchy (tcp6_sock, upd6_sock, etc) * this _must_ be the last member, so that inet6_sk_generic * is able to calculate its offset from the base struct sock * by using the struct proto->slab_obj_size member. -acme */ struct ipv6_pinfo { struct in6_addr saddr; struct in6_pktinfo sticky_pktinfo; const struct in6_addr *daddr_cache; #ifdef CONFIG_IPV6_SUBTREES const struct in6_addr *saddr_cache; #endif __be32 flow_label; __u32 frag_size; /* * Packed in 16bits. * Omit one shift by by putting the signed field at MSB. */ #if defined(__BIG_ENDIAN_BITFIELD) __s16 hop_limit:9; __u16 __unused_1:7; #else __u16 __unused_1:7; __s16 hop_limit:9; #endif #if defined(__BIG_ENDIAN_BITFIELD) /* Packed in 16bits. */ __s16 mcast_hops:9; __u16 __unused_2:6, mc_loop:1; #else __u16 mc_loop:1, __unused_2:6; __s16 mcast_hops:9; #endif int ucast_oif; int mcast_oif; /* pktoption flags */ union { struct { __u16 srcrt:1, osrcrt:1, rxinfo:1, rxoinfo:1, rxhlim:1, rxohlim:1, hopopts:1, ohopopts:1, dstopts:1, odstopts:1, rxflow:1, rxtclass:1, rxpmtu:1, rxorigdstaddr:1, recvfragsize:1; /* 1 bits hole */ } bits; __u16 all; } rxopt; /* sockopt flags */ __u16 recverr:1, sndflow:1, repflow:1, pmtudisc:3, padding:1, /* 1 bit hole */ srcprefs:3, /* 001: prefer temporary address * 010: prefer public address * 100: prefer care-of address */ dontfrag:1, autoflowlabel:1; __u8 min_hopcount; __u8 tclass; __be32 rcv_flowinfo; __u32 dst_cookie; __u32 rx_dst_cookie; struct ipv6_mc_socklist __rcu *ipv6_mc_list; struct ipv6_ac_socklist *ipv6_ac_list; struct ipv6_fl_socklist __rcu *ipv6_fl_list; struct ipv6_txoptions __rcu *opt; struct sk_buff *pktoptions; struct sk_buff *rxpmtu; struct inet6_cork cork; }; /* WARNING: don't change the layout of the members in {raw,udp,tcp}6_sock! */ struct raw6_sock { /* inet_sock has to be the first member of raw6_sock */ struct inet_sock inet; __u32 checksum; /* perform checksum */ __u32 offset; /* checksum offset */ struct icmp6_filter filter; __u32 ip6mr_table; /* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */ struct ipv6_pinfo inet6; }; struct udp6_sock { struct udp_sock udp; /* ipv6_pinfo has to be the last member of udp6_sock, see inet6_sk_generic */ struct ipv6_pinfo inet6; }; struct tcp6_sock { struct tcp_sock tcp; /* ipv6_pinfo has to be the last member of tcp6_sock, see inet6_sk_generic */ struct ipv6_pinfo inet6; }; extern int inet6_sk_rebuild_header(struct sock *sk); struct tcp6_timewait_sock { struct tcp_timewait_sock tcp6tw_tcp; }; #if IS_ENABLED(CONFIG_IPV6) bool ipv6_mod_enabled(void);
static inline struct ipv6_pinfo *inet6_sk(const struct sock *__sk) { return sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; }

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Eric Dumazet723.33%125.00%
David S. Miller413.33%125.00%
Arnaldo Carvalho de Melo310.00%125.00%
Total30100.00%4100.00%


static inline struct raw6_sock *raw6_sk(const struct sock *sk) { return (struct raw6_sock *)sk; }

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Ingo Molnar1773.91%133.33%
David S. Miller313.04%133.33%
Arnaldo Carvalho de Melo313.04%133.33%
Total23100.00%3100.00%


static inline void inet_sk_copy_descendant(struct sock *sk_to, const struct sock *sk_from) { int ancestor_size = sizeof(struct inet_sock); if (sk_from->sk_family == PF_INET6) ancestor_size += sizeof(struct ipv6_pinfo); __inet_sk_copy_descendant(sk_to, sk_from, ancestor_size); }

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#define __ipv6_only_sock(sk) (sk->sk_ipv6only) #define ipv6_only_sock(sk) (__ipv6_only_sock(sk)) #define ipv6_sk_rxinfo(sk) ((sk)->sk_family == PF_INET6 && \ inet6_sk(sk)->rxopt.bits.rxinfo)
static inline const struct in6_addr *inet6_rcv_saddr(const struct sock *sk) { if (sk->sk_family == AF_INET6) return &sk->sk_v6_rcv_saddr; return NULL; }

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Eric Dumazet1030.30%133.33%
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static inline int inet_v6_ipv6only(const struct sock *sk) { /* ipv6only field is at same position for timewait and other sockets */ return ipv6_only_sock(sk); }

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Eric Dumazet15.00%133.33%
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#else #define __ipv6_only_sock(sk) 0 #define ipv6_only_sock(sk) 0 #define ipv6_sk_rxinfo(sk) 0
static inline bool ipv6_mod_enabled(void) { return false; }

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static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk) { return NULL; }

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Andrew Morton18100.00%1100.00%
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static inline struct inet6_request_sock * inet6_rsk(const struct request_sock *rsk) { return NULL; }

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static inline struct raw6_sock *raw6_sk(const struct sock *sk) { return NULL; }

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Andrew Morton1688.89%150.00%
Arnaldo Carvalho de Melo211.11%150.00%
Total18100.00%2100.00%

#define inet6_rcv_saddr(__sk) NULL #define tcp_twsk_ipv6only(__sk) 0 #define inet_v6_ipv6only(__sk) 0 #endif /* IS_ENABLED(CONFIG_IPV6) */ #endif /* _IPV6_H */

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Arnaldo Carvalho de Melo25820.76%1815.65%
Hideaki Yoshifuji / 吉藤英明21016.89%2118.26%
David S. Miller16313.11%43.48%
David Ahern13510.86%54.35%
Krishna Kumar534.26%10.87%
Hannes Frederic Sowa443.54%76.09%
Brian Haley383.06%32.61%
Linus Torvalds (pre-git)372.98%32.61%
Andrew Morton342.74%10.87%
Ingo Molnar332.65%10.87%
Eric Dumazet312.49%86.96%
Joseph Gasparakis262.09%10.87%
Vlad Yasevich191.53%10.87%
Patrick McHardy151.21%43.48%
David Lebrun110.88%21.74%
Masahide Nakamura100.80%10.87%
Herbert Xu90.72%10.87%
David L Stevens80.64%21.74%
Neil Horman80.64%10.87%
Florent Fourcot70.56%21.74%
Paul Durrant70.56%10.87%
Johannes Berg60.48%21.74%
Erik Kline60.48%21.74%
Willem de Bruijn50.40%10.87%
Thomas Graf50.40%10.87%
Yang Hongyang40.32%10.87%
Jan Engelhardt40.32%10.87%
Tom Herbert40.32%10.87%
Kazunori Miyazawa40.32%10.87%
Balazs Scheidler40.32%10.87%
Florian Westphal40.32%10.87%
Stephen Hemminger30.24%10.87%
David Forster30.24%10.87%
Maciej Żenczykowski30.24%10.87%
Felix Jia30.24%10.87%
Ben Greear30.24%10.87%
Harout Hedeshian30.24%10.87%
Erich E. Hoover30.24%10.87%
Joel Scherpelz30.24%10.87%
Konstantin Khlebnikov30.24%10.87%
Erik Nordmark30.24%10.87%
Octavian Purdila30.24%10.87%
Andy Gospodarek30.24%10.87%
Hangbin Liu30.24%10.87%
Al Viro10.08%10.87%
David Howells10.08%10.87%
Total1243100.00%115100.00%
Directory: include/linux
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