cregit-Linux how code gets into the kernel

Release 4.15 include/net/fib_rules.h

Directory: include/net
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_FIB_RULES_H

#define __NET_FIB_RULES_H

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/fib_rules.h>
#include <linux/refcount.h>
#include <net/flow.h>
#include <net/rtnetlink.h>
#include <net/fib_notifier.h>


struct fib_kuid_range {
	
kuid_t start;
	
kuid_t end;
};


struct fib_rule {
	
struct list_head	list;
	
int			iifindex;
	
int			oifindex;
	
u32			mark;
	
u32			mark_mask;
	
u32			flags;
	
u32			table;
	
u8			action;
	
u8			l3mdev;
	/* 2 bytes hole, try to use */
	
u32			target;
	
__be64			tun_id;
	
struct fib_rule __rcu	*ctarget;
	
struct net		*fr_net;

	
refcount_t		refcnt;
	
u32			pref;
	
int			suppress_ifgroup;
	
int			suppress_prefixlen;
	
char			iifname[IFNAMSIZ];
	
char			oifname[IFNAMSIZ];
	
struct fib_kuid_range	uid_range;
	
struct rcu_head		rcu;
};


struct fib_lookup_arg {
	
void			*lookup_ptr;
	
void			*result;
	
struct fib_rule		*rule;
	
u32			table;
	
int			flags;

#define FIB_LOOKUP_NOREF		1

#define FIB_LOOKUP_IGNORE_LINKSTATE	2
};


struct fib_rules_ops {
	
int			family;
	
struct list_head	list;
	
int			rule_size;
	
int			addr_size;
	
int			unresolved_rules;
	
int			nr_goto_rules;
	
unsigned int		fib_rules_seq;

	
int			(*action)(struct fib_rule *,
					  struct flowi *, int,
					  struct fib_lookup_arg *);
	
bool			(*suppress)(struct fib_rule *,
					    struct fib_lookup_arg *);
	
int			(*match)(struct fib_rule *,
					 struct flowi *, int);
	
int			(*configure)(struct fib_rule *,
					     struct sk_buff *,
					     struct fib_rule_hdr *,
					     struct nlattr **);
	
int			(*delete)(struct fib_rule *);
	
int			(*compare)(struct fib_rule *,
					   struct fib_rule_hdr *,
					   struct nlattr **);
	
int			(*fill)(struct fib_rule *, struct sk_buff *,
					struct fib_rule_hdr *);
	
size_t			(*nlmsg_payload)(struct fib_rule *);

	/* Called after modifications to the rules set, must flush
         * the route cache if one exists. */
	
void			(*flush_cache)(struct fib_rules_ops *ops);

	
int			nlgroup;
	
const struct nla_policy	*policy;
	
struct list_head	rules_list;
	
struct module		*owner;
	
struct net		*fro_net;
	
struct rcu_head		rcu;
};


struct fib_rule_notifier_info {
	
struct fib_notifier_info info; /* must be first */
	
struct fib_rule *rule;
};


#define FRA_GENERIC_POLICY \
	[FRA_IIFNAME]   = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
        [FRA_OIFNAME]   = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
        [FRA_PRIORITY]  = { .type = NLA_U32 }, \
        [FRA_FWMARK]    = { .type = NLA_U32 }, \
        [FRA_FWMASK]    = { .type = NLA_U32 }, \
        [FRA_TABLE]     = { .type = NLA_U32 }, \
        [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
        [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
        [FRA_GOTO]      = { .type = NLA_U32 }, \
        [FRA_L3MDEV]    = { .type = NLA_U8 }, \
        [FRA_UID_RANGE] = { .len = sizeof(struct fib_rule_uid_range) }


static inline void fib_rule_get(struct fib_rule *rule) { refcount_inc(&rule->refcnt); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf1995.00%150.00%
Elena Reshetova15.00%150.00%
Total20100.00%2100.00%


static inline void fib_rule_put(struct fib_rule *rule) { if (refcount_dec_and_test(&rule->refcnt)) kfree_rcu(rule, rcu); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf2689.66%133.33%
Eric W. Biedermann26.90%133.33%
Elena Reshetova13.45%133.33%
Total29100.00%3100.00%

#ifdef CONFIG_NET_L3_MASTER_DEV
static inline u32 fib_rule_get_table(struct fib_rule *rule, struct fib_lookup_arg *arg) { return rule->l3mdev ? arg->table : rule->table; }

Contributors

PersonTokensPropCommitsCommitProp
David Ahern30100.00%1100.00%
Total30100.00%1100.00%

#else
static inline u32 fib_rule_get_table(struct fib_rule *rule, struct fib_lookup_arg *arg) { return rule->table; }

Contributors

PersonTokensPropCommitsCommitProp
David Ahern22100.00%1100.00%
Total22100.00%1100.00%

#endif
static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla) { if (nla[FRA_TABLE]) return nla_get_u32(nla[FRA_TABLE]); return frh->table; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy39100.00%1100.00%
Total39100.00%1100.00%

struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, struct net *); void fib_rules_unregister(struct fib_rules_ops *); int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags, struct fib_lookup_arg *); int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table, u32 flags); bool fib_rule_matchall(const struct fib_rule *rule); int fib_rules_dump(struct net *net, struct notifier_block *nb, int family); unsigned int fib_rules_seq_read(struct net *net, int family); int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack); int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack); #endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf32648.73%925.00%
David Ahern10415.55%25.56%
Ido Schimmel629.27%25.56%
Patrick McHardy578.52%616.67%
Denis V. Lunev274.04%411.11%
Eric Dumazet243.59%38.33%
Lorenzo Colitti162.39%12.78%
Stefan Tomanek152.24%12.78%
Eric W. Biedermann131.94%25.56%
David S. Miller101.49%12.78%
Elena Reshetova60.90%12.78%
Andy Gospodarek40.60%12.78%
Tejun Heo30.45%12.78%
Alexander Duyck10.15%12.78%
Greg Kroah-Hartman10.15%12.78%
Total669100.00%36100.00%
Directory: include/net
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