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-rw-r--r--include/net/ip_fib.h124
1 files changed, 81 insertions, 43 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 9c8214d2116d..d0e28f4ab099 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -32,10 +32,14 @@ struct fib_config {
u8 fc_protocol;
u8 fc_scope;
u8 fc_type;
- /* 3 bytes unused */
+ u8 fc_gw_family;
+ /* 2 bytes unused */
u32 fc_table;
__be32 fc_dst;
- __be32 fc_gw;
+ union {
+ __be32 fc_gw4;
+ struct in6_addr fc_gw6;
+ };
int fc_oif;
u32 fc_flags;
u32 fc_priority;
@@ -76,27 +80,49 @@ struct fnhe_hash_bucket {
#define FNHE_HASH_SIZE (1 << FNHE_HASH_SHIFT)
#define FNHE_RECLAIM_DEPTH 5
+struct fib_nh_common {
+ struct net_device *nhc_dev;
+ int nhc_oif;
+ unsigned char nhc_scope;
+ u8 nhc_family;
+ u8 nhc_gw_family;
+ unsigned char nhc_flags;
+ struct lwtunnel_state *nhc_lwtstate;
+
+ union {
+ __be32 ipv4;
+ struct in6_addr ipv6;
+ } nhc_gw;
+
+ int nhc_weight;
+ atomic_t nhc_upper_bound;
+
+ /* v4 specific, but allows fib6_nh with v4 routes */
+ struct rtable __rcu * __percpu *nhc_pcpu_rth_output;
+ struct rtable __rcu *nhc_rth_input;
+ struct fnhe_hash_bucket __rcu *nhc_exceptions;
+};
+
struct fib_nh {
- struct net_device *nh_dev;
+ struct fib_nh_common nh_common;
struct hlist_node nh_hash;
struct fib_info *nh_parent;
- unsigned int nh_flags;
- unsigned char nh_scope;
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
- int nh_weight;
- atomic_t nh_upper_bound;
-#endif
#ifdef CONFIG_IP_ROUTE_CLASSID
__u32 nh_tclassid;
#endif
- int nh_oif;
- __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 __rcu *nh_exceptions;
- struct lwtunnel_state *nh_lwtstate;
+#define fib_nh_family nh_common.nhc_family
+#define fib_nh_dev nh_common.nhc_dev
+#define fib_nh_oif nh_common.nhc_oif
+#define fib_nh_flags nh_common.nhc_flags
+#define fib_nh_lws nh_common.nhc_lwtstate
+#define fib_nh_scope nh_common.nhc_scope
+#define fib_nh_gw_family nh_common.nhc_gw_family
+#define fib_nh_gw4 nh_common.nhc_gw.ipv4
+#define fib_nh_gw6 nh_common.nhc_gw.ipv6
+#define fib_nh_weight nh_common.nhc_weight
+#define fib_nh_upper_bound nh_common.nhc_upper_bound
};
/*
@@ -123,9 +149,10 @@ struct fib_info {
#define fib_rtt fib_metrics->metrics[RTAX_RTT-1]
#define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1]
int fib_nhs;
+ bool fib_nh_is_v6;
struct rcu_head rcu;
struct fib_nh fib_nh[0];
-#define fib_dev fib_nh[0].nh_dev
+#define fib_dev fib_nh[0].fib_nh_dev
};
@@ -135,15 +162,16 @@ struct fib_rule;
struct fib_table;
struct fib_result {
- __be32 prefix;
- unsigned char prefixlen;
- unsigned char nh_sel;
- unsigned char type;
- unsigned char scope;
- u32 tclassid;
- struct fib_info *fi;
- struct fib_table *table;
- struct hlist_head *fa_head;
+ __be32 prefix;
+ unsigned char prefixlen;
+ unsigned char nh_sel;
+ unsigned char type;
+ unsigned char scope;
+ u32 tclassid;
+ struct fib_nh_common *nhc;
+ struct fib_info *fi;
+ struct fib_table *table;
+ struct hlist_head *fa_head;
};
struct fib_result_nl {
@@ -161,11 +189,10 @@ struct fib_result_nl {
int err;
};
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
-#define FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
-#else /* CONFIG_IP_ROUTE_MULTIPATH */
-#define FIB_RES_NH(res) ((res).fi->fib_nh[0])
-#endif /* CONFIG_IP_ROUTE_MULTIPATH */
+static inline struct fib_nh_common *fib_info_nhc(struct fib_info *fi, int nhsel)
+{
+ return &fi->fib_nh[nhsel].nh_common;
+}
#ifdef CONFIG_IP_MULTIPLE_TABLES
#define FIB_TABLE_HASHSZ 256
@@ -174,18 +201,11 @@ struct fib_result_nl {
#endif
__be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);
+__be32 fib_result_prefsrc(struct net *net, struct fib_result *res);
-#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)
-
-#define FIB_RES_PREFSRC(net, res) ((res).fi->fib_prefsrc ? : \
- FIB_RES_SADDR(net, res))
+#define FIB_RES_NHC(res) ((res).nhc)
+#define FIB_RES_DEV(res) (FIB_RES_NHC(res)->nhc_dev)
+#define FIB_RES_OIF(res) (FIB_RES_NHC(res)->nhc_oif)
struct fib_entry_notifier_info {
struct fib_notifier_info info; /* must be first */
@@ -383,6 +403,8 @@ static inline bool fib4_rules_early_flow_dissect(struct net *net,
/* Exported by fib_frontend.c */
extern const struct nla_policy rtm_ipv4_policy[];
void ip_fib_init(void);
+int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla,
+ struct netlink_ext_ack *extack);
__be32 fib_compute_spec_dst(struct sk_buff *skb);
bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev);
int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
@@ -405,7 +427,7 @@ int fib_unmerge(struct net *net);
int ip_fib_check_default(__be32 gw, struct net_device *dev);
int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force);
int fib_sync_down_addr(struct net_device *dev, __be32 local);
-int fib_sync_up(struct net_device *dev, unsigned int nh_flags);
+int fib_sync_up(struct net_device *dev, unsigned char nh_flags);
void fib_sync_mtu(struct net_device *dev, u32 orig_mtu);
#ifdef CONFIG_IP_ROUTE_MULTIPATH
@@ -416,6 +438,15 @@ void fib_select_multipath(struct fib_result *res, int hash);
void fib_select_path(struct net *net, struct fib_result *res,
struct flowi4 *fl4, const struct sk_buff *skb);
+int fib_nh_init(struct net *net, struct fib_nh *fib_nh,
+ struct fib_config *cfg, int nh_weight,
+ struct netlink_ext_ack *extack);
+void fib_nh_release(struct net *net, struct fib_nh *fib_nh);
+int fib_nh_common_init(struct fib_nh_common *nhc, struct nlattr *fc_encap,
+ u16 fc_encap_type, void *cfg, gfp_t gfp_flags,
+ struct netlink_ext_ack *extack);
+void fib_nh_common_release(struct fib_nh_common *nhc);
+
/* Exported by fib_trie.c */
void fib_trie_init(void);
struct fib_table *fib_trie_table(u32 id, struct fib_table *alias);
@@ -423,10 +454,12 @@ struct fib_table *fib_trie_table(u32 id, struct fib_table *alias);
static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
{
#ifdef CONFIG_IP_ROUTE_CLASSID
+ struct fib_nh_common *nhc = res->nhc;
+ struct fib_nh *nh = container_of(nhc, struct fib_nh, nh_common);
#ifdef CONFIG_IP_MULTIPLE_TABLES
u32 rtag;
#endif
- *itag = FIB_RES_NH(*res).nh_tclassid<<16;
+ *itag = nh->nh_tclassid << 16;
#ifdef CONFIG_IP_MULTIPLE_TABLES
rtag = res->tclassid;
if (*itag == 0)
@@ -467,4 +500,9 @@ u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr);
int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
struct fib_dump_filter *filter,
struct netlink_callback *cb);
+
+int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh,
+ unsigned char *flags, bool skip_oif);
+int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh,
+ int nh_weight);
#endif /* _NET_FIB_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.