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-rw-r--r--include/net/ip_fib.h338
1 files changed, 185 insertions, 153 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index e000fa2cd5f..9922093f575 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -16,47 +16,78 @@
#ifndef _NET_IP_FIB_H
#define _NET_IP_FIB_H
-#include <linux/config.h>
#include <net/flow.h>
#include <linux/seq_file.h>
+#include <linux/rcupdate.h>
+#include <net/fib_rules.h>
+#include <net/inetpeer.h>
+#include <linux/percpu.h>
+
+struct fib_config {
+ u8 fc_dst_len;
+ u8 fc_tos;
+ u8 fc_protocol;
+ u8 fc_scope;
+ u8 fc_type;
+ /* 3 bytes unused */
+ u32 fc_table;
+ __be32 fc_dst;
+ __be32 fc_gw;
+ int fc_oif;
+ u32 fc_flags;
+ u32 fc_priority;
+ __be32 fc_prefsrc;
+ struct nlattr *fc_mx;
+ struct rtnexthop *fc_mp;
+ int fc_mx_len;
+ int fc_mp_len;
+ u32 fc_flow;
+ u32 fc_nlflags;
+ struct nl_info fc_nlinfo;
+ };
-/* WARNING: The ordering of these elements must match ordering
- * of RTA_* rtnetlink attribute numbers.
- */
-struct kern_rta {
- void *rta_dst;
- void *rta_src;
- int *rta_iif;
- int *rta_oif;
- void *rta_gw;
- u32 *rta_priority;
- void *rta_prefsrc;
- struct rtattr *rta_mx;
- struct rtattr *rta_mp;
- unsigned char *rta_protoinfo;
- u32 *rta_flow;
- struct rta_cacheinfo *rta_ci;
- struct rta_session *rta_sess;
- u32 *rta_mp_alg;
+struct fib_info;
+struct rtable;
+
+struct fib_nh_exception {
+ struct fib_nh_exception __rcu *fnhe_next;
+ int fnhe_genid;
+ __be32 fnhe_daddr;
+ u32 fnhe_pmtu;
+ __be32 fnhe_gw;
+ unsigned long fnhe_expires;
+ struct rtable __rcu *fnhe_rth_input;
+ struct rtable __rcu *fnhe_rth_output;
+ unsigned long fnhe_stamp;
};
-struct fib_info;
+struct fnhe_hash_bucket {
+ struct fib_nh_exception __rcu *chain;
+};
+
+#define FNHE_HASH_SIZE 2048
+#define FNHE_RECLAIM_DEPTH 5
struct fib_nh {
struct net_device *nh_dev;
struct hlist_node nh_hash;
struct fib_info *nh_parent;
- unsigned nh_flags;
+ unsigned int nh_flags;
unsigned char nh_scope;
#ifdef CONFIG_IP_ROUTE_MULTIPATH
int nh_weight;
int nh_power;
#endif
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
__u32 nh_tclassid;
#endif
int nh_oif;
- u32 nh_gw;
+ __be32 nh_gw;
+ __be32 nh_saddr;
+ int nh_saddr_genid;
+ struct rtable __rcu * __percpu *nh_pcpu_rth_output;
+ struct rtable __rcu *nh_rth_input;
+ struct fnhe_hash_bucket *nh_exceptions;
};
/*
@@ -66,14 +97,17 @@ struct fib_nh {
struct fib_info {
struct hlist_node fib_hash;
struct hlist_node fib_lhash;
+ struct net *fib_net;
int fib_treeref;
atomic_t fib_clntref;
- int fib_dead;
- unsigned fib_flags;
- int fib_protocol;
- u32 fib_prefsrc;
+ unsigned int fib_flags;
+ unsigned char fib_dead;
+ unsigned char fib_protocol;
+ unsigned char fib_scope;
+ unsigned char fib_type;
+ __be32 fib_prefsrc;
u32 fib_priority;
- u32 fib_metrics[RTAX_MAX];
+ u32 *fib_metrics;
#define fib_mtu fib_metrics[RTAX_MTU-1]
#define fib_window fib_metrics[RTAX_WINDOW-1]
#define fib_rtt fib_metrics[RTAX_RTT-1]
@@ -82,9 +116,7 @@ struct fib_info {
#ifdef CONFIG_IP_ROUTE_MULTIPATH
int fib_power;
#endif
-#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
- u32 fib_mp_alg;
-#endif
+ struct rcu_head rcu;
struct fib_nh fib_nh[0];
#define fib_dev fib_nh[0].nh_dev
};
@@ -94,24 +126,21 @@ struct fib_info {
struct fib_rule;
#endif
+struct fib_table;
struct fib_result {
unsigned char prefixlen;
unsigned char nh_sel;
unsigned char type;
unsigned char scope;
-#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
- __u32 network;
- __u32 netmask;
-#endif
+ u32 tclassid;
struct fib_info *fi;
-#ifdef CONFIG_IP_MULTIPLE_TABLES
- struct fib_rule *r;
-#endif
+ struct fib_table *table;
+ struct list_head *fa_head;
};
struct fib_result_nl {
- u32 fl_addr; /* To be looked up*/
- u32 fl_fwmark;
+ __be32 fl_addr; /* To be looked up*/
+ u32 fl_mark;
unsigned char fl_tos;
unsigned char fl_scope;
unsigned char tb_id_in;
@@ -125,153 +154,158 @@ struct fib_result_nl {
};
#ifdef CONFIG_IP_ROUTE_MULTIPATH
-
#define FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
-#define FIB_RES_RESET(res) ((res).nh_sel = 0)
-
#else /* CONFIG_IP_ROUTE_MULTIPATH */
-
#define FIB_RES_NH(res) ((res).fi->fib_nh[0])
-#define FIB_RES_RESET(res)
-
#endif /* CONFIG_IP_ROUTE_MULTIPATH */
-#define FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __fib_res_prefsrc(&res))
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+#define FIB_TABLE_HASHSZ 256
+#else
+#define FIB_TABLE_HASHSZ 2
+#endif
+
+__be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);
+
+#define FIB_RES_SADDR(net, res) \
+ ((FIB_RES_NH(res).nh_saddr_genid == \
+ atomic_read(&(net)->ipv4.dev_addr_genid)) ? \
+ FIB_RES_NH(res).nh_saddr : \
+ fib_info_update_nh_saddr((net), &FIB_RES_NH(res)))
#define FIB_RES_GW(res) (FIB_RES_NH(res).nh_gw)
#define FIB_RES_DEV(res) (FIB_RES_NH(res).nh_dev)
#define FIB_RES_OIF(res) (FIB_RES_NH(res).nh_oif)
-#ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-#define FIB_RES_NETWORK(res) ((res).network)
-#define FIB_RES_NETMASK(res) ((res).netmask)
-#else /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
-#define FIB_RES_NETWORK(res) (0)
-#define FIB_RES_NETMASK(res) (0)
-#endif /* CONFIG_IP_ROUTE_MULTIPATH_WRANDOM */
+#define FIB_RES_PREFSRC(net, res) ((res).fi->fib_prefsrc ? : \
+ FIB_RES_SADDR(net, res))
struct fib_table {
- unsigned char tb_id;
- unsigned tb_stamp;
- int (*tb_lookup)(struct fib_table *tb, const struct flowi *flp, struct fib_result *res);
- int (*tb_insert)(struct fib_table *table, struct rtmsg *r,
- struct kern_rta *rta, struct nlmsghdr *n,
- struct netlink_skb_parms *req);
- int (*tb_delete)(struct fib_table *table, struct rtmsg *r,
- struct kern_rta *rta, struct nlmsghdr *n,
- struct netlink_skb_parms *req);
- int (*tb_dump)(struct fib_table *table, struct sk_buff *skb,
- struct netlink_callback *cb);
- int (*tb_flush)(struct fib_table *table);
- void (*tb_select_default)(struct fib_table *table,
- const struct flowi *flp, struct fib_result *res);
-
- unsigned char tb_data[0];
+ struct hlist_node tb_hlist;
+ u32 tb_id;
+ int tb_default;
+ int tb_num_default;
+ unsigned long tb_data[0];
};
+int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
+ struct fib_result *res, int fib_flags);
+int fib_table_insert(struct fib_table *, struct fib_config *);
+int fib_table_delete(struct fib_table *, struct fib_config *);
+int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
+ struct netlink_callback *cb);
+int fib_table_flush(struct fib_table *table);
+void fib_free_table(struct fib_table *tb);
+
+
+
#ifndef CONFIG_IP_MULTIPLE_TABLES
-extern struct fib_table *ip_fib_local_table;
-extern struct fib_table *ip_fib_main_table;
+#define TABLE_LOCAL_INDEX 0
+#define TABLE_MAIN_INDEX 1
-static inline struct fib_table *fib_get_table(int id)
+static inline struct fib_table *fib_get_table(struct net *net, u32 id)
{
- if (id != RT_TABLE_LOCAL)
- return ip_fib_main_table;
- return ip_fib_local_table;
-}
+ struct hlist_head *ptr;
-static inline struct fib_table *fib_new_table(int id)
-{
- return fib_get_table(id);
+ ptr = id == RT_TABLE_LOCAL ?
+ &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] :
+ &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX];
+ return hlist_entry(ptr->first, struct fib_table, tb_hlist);
}
-static inline int fib_lookup(const struct flowi *flp, struct fib_result *res)
+static inline struct fib_table *fib_new_table(struct net *net, u32 id)
{
- if (ip_fib_local_table->tb_lookup(ip_fib_local_table, flp, res) &&
- ip_fib_main_table->tb_lookup(ip_fib_main_table, flp, res))
- return -ENETUNREACH;
- return 0;
+ return fib_get_table(net, id);
}
-static inline void fib_select_default(const struct flowi *flp, struct fib_result *res)
+static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
+ struct fib_result *res)
{
- if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
- ip_fib_main_table->tb_select_default(ip_fib_main_table, flp, res);
+ struct fib_table *table;
+
+ table = fib_get_table(net, RT_TABLE_LOCAL);
+ if (!fib_table_lookup(table, flp, res, FIB_LOOKUP_NOREF))
+ return 0;
+
+ table = fib_get_table(net, RT_TABLE_MAIN);
+ if (!fib_table_lookup(table, flp, res, FIB_LOOKUP_NOREF))
+ return 0;
+ return -ENETUNREACH;
}
#else /* CONFIG_IP_MULTIPLE_TABLES */
-#define ip_fib_local_table (fib_tables[RT_TABLE_LOCAL])
-#define ip_fib_main_table (fib_tables[RT_TABLE_MAIN])
+int __net_init fib4_rules_init(struct net *net);
+void __net_exit fib4_rules_exit(struct net *net);
-extern struct fib_table * fib_tables[RT_TABLE_MAX+1];
-extern int fib_lookup(const struct flowi *flp, struct fib_result *res);
-extern struct fib_table *__fib_new_table(int id);
-extern void fib_rule_put(struct fib_rule *r);
+struct fib_table *fib_new_table(struct net *net, u32 id);
+struct fib_table *fib_get_table(struct net *net, u32 id);
-static inline struct fib_table *fib_get_table(int id)
-{
- if (id == 0)
- id = RT_TABLE_MAIN;
-
- return fib_tables[id];
-}
+int __fib_lookup(struct net *net, struct flowi4 *flp, struct fib_result *res);
-static inline struct fib_table *fib_new_table(int id)
+static inline int fib_lookup(struct net *net, struct flowi4 *flp,
+ struct fib_result *res)
{
- if (id == 0)
- id = RT_TABLE_MAIN;
-
- return fib_tables[id] ? : __fib_new_table(id);
+ if (!net->ipv4.fib_has_custom_rules) {
+ res->tclassid = 0;
+ if (net->ipv4.fib_local &&
+ !fib_table_lookup(net->ipv4.fib_local, flp, res,
+ FIB_LOOKUP_NOREF))
+ return 0;
+ if (net->ipv4.fib_main &&
+ !fib_table_lookup(net->ipv4.fib_main, flp, res,
+ FIB_LOOKUP_NOREF))
+ return 0;
+ if (net->ipv4.fib_default &&
+ !fib_table_lookup(net->ipv4.fib_default, flp, res,
+ FIB_LOOKUP_NOREF))
+ return 0;
+ return -ENETUNREACH;
+ }
+ return __fib_lookup(net, flp, res);
}
-extern void fib_select_default(const struct flowi *flp, struct fib_result *res);
-
#endif /* CONFIG_IP_MULTIPLE_TABLES */
/* Exported by fib_frontend.c */
-extern void ip_fib_init(void);
-extern int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
-extern int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
-extern int inet_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
-extern int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
-extern int fib_validate_source(u32 src, u32 dst, u8 tos, int oif,
- struct net_device *dev, u32 *spec_dst, u32 *itag);
-extern void fib_select_multipath(const struct flowi *flp, struct fib_result *res);
-
-struct rtentry;
+extern const struct nla_policy rtm_ipv4_policy[];
+void ip_fib_init(void);
+__be32 fib_compute_spec_dst(struct sk_buff *skb);
+int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
+ u8 tos, int oif, struct net_device *dev,
+ struct in_device *idev, u32 *itag);
+void fib_select_default(struct fib_result *res);
+#ifdef CONFIG_IP_ROUTE_CLASSID
+static inline int fib_num_tclassid_users(struct net *net)
+{
+ return net->ipv4.fib_num_tclassid_users;
+}
+#else
+static inline int fib_num_tclassid_users(struct net *net)
+{
+ return 0;
+}
+#endif
/* Exported by fib_semantics.c */
-extern int ip_fib_check_default(u32 gw, struct net_device *dev);
-extern int fib_sync_down(u32 local, struct net_device *dev, int force);
-extern int fib_sync_up(struct net_device *dev);
-extern int fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
- struct kern_rta *rta, struct rtentry *r);
-extern u32 __fib_res_prefsrc(struct fib_result *res);
+int ip_fib_check_default(__be32 gw, struct net_device *dev);
+int fib_sync_down_dev(struct net_device *dev, int force);
+int fib_sync_down_addr(struct net *net, __be32 local);
+int fib_sync_up(struct net_device *dev);
+void fib_select_multipath(struct fib_result *res);
-/* Exported by fib_hash.c */
-extern struct fib_table *fib_hash_init(int id);
+/* Exported by fib_trie.c */
+void fib_trie_init(void);
+struct fib_table *fib_trie_table(u32 id);
-#ifdef CONFIG_IP_MULTIPLE_TABLES
-/* Exported by fib_rules.c */
-
-extern int inet_rtm_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
-extern int inet_rtm_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
-extern int inet_dump_rules(struct sk_buff *skb, struct netlink_callback *cb);
-#ifdef CONFIG_NET_CLS_ROUTE
-extern u32 fib_rules_tclass(struct fib_result *res);
-#endif
-extern void fib_rules_init(void);
-#endif
-
-static inline void fib_combine_itag(u32 *itag, struct fib_result *res)
+static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
{
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
#ifdef CONFIG_IP_MULTIPLE_TABLES
u32 rtag;
#endif
*itag = FIB_RES_NH(*res).nh_tclassid<<16;
#ifdef CONFIG_IP_MULTIPLE_TABLES
- rtag = fib_rules_tclass(res);
+ rtag = res->tclassid;
if (*itag == 0)
*itag = (rtag<<16);
*itag |= (rtag>>16);
@@ -279,7 +313,7 @@ static inline void fib_combine_itag(u32 *itag, struct fib_result *res)
#endif
}
-extern void free_fib_info(struct fib_info *fi);
+void free_fib_info(struct fib_info *fi);
static inline void fib_info_put(struct fib_info *fi)
{
@@ -287,19 +321,17 @@ static inline void fib_info_put(struct fib_info *fi)
free_fib_info(fi);
}
-static inline void fib_res_put(struct fib_result *res)
+#ifdef CONFIG_PROC_FS
+int __net_init fib_proc_init(struct net *net);
+void __net_exit fib_proc_exit(struct net *net);
+#else
+static inline int fib_proc_init(struct net *net)
+{
+ return 0;
+}
+static inline void fib_proc_exit(struct net *net)
{
- if (res->fi)
- fib_info_put(res->fi);
-#ifdef CONFIG_IP_MULTIPLE_TABLES
- if (res->r)
- fib_rule_put(res->r);
-#endif
}
-
-#ifdef CONFIG_PROC_FS
-extern int fib_proc_init(void);
-extern void fib_proc_exit(void);
#endif
#endif /* _NET_FIB_H */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 21:00:24 +0000