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-rw-r--r--include/net/ip_fib.h12
-rw-r--r--net/ipv4/Makefile2
-rw-r--r--net/ipv4/fib_notifier.c86
-rw-r--r--net/ipv4/fib_rules.c8
-rw-r--r--net/ipv4/fib_trie.c108
5 files changed, 113 insertions, 103 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 368bb4024b78..d9cee9659978 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -232,9 +232,21 @@ enum fib_event_type {
int register_fib_notifier(struct notifier_block *nb,
void (*cb)(struct notifier_block *nb));
int unregister_fib_notifier(struct notifier_block *nb);
+int call_fib_notifier(struct notifier_block *nb, struct net *net,
+ enum fib_event_type event_type,
+ struct fib_notifier_info *info);
int call_fib_notifiers(struct net *net, enum fib_event_type event_type,
struct fib_notifier_info *info);
+void fib_notify(struct net *net, struct notifier_block *nb);
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+void fib_rules_notify(struct net *net, struct notifier_block *nb);
+#else
+static inline void fib_rules_notify(struct net *net, struct notifier_block *nb)
+{
+}
+#endif
+
struct fib_table {
struct hlist_node tb_hlist;
u32 tb_id;
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index c6d4238ff94a..f83de23a30e7 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -11,7 +11,7 @@ obj-y := route.o inetpeer.o protocol.o \
tcp_rate.o tcp_recovery.o \
tcp_offload.o datagram.o raw.o udp.o udplite.o \
udp_offload.o arp.o icmp.o devinet.o af_inet.o igmp.o \
- fib_frontend.o fib_semantics.o fib_trie.o \
+ fib_frontend.o fib_semantics.o fib_trie.o fib_notifier.o \
inet_fragment.o ping.o ip_tunnel_core.o gre_offload.o
obj-$(CONFIG_NET_IP_TUNNEL) += ip_tunnel.o
diff --git a/net/ipv4/fib_notifier.c b/net/ipv4/fib_notifier.c
new file mode 100644
index 000000000000..e0714d975947
--- /dev/null
+++ b/net/ipv4/fib_notifier.c
@@ -0,0 +1,86 @@
+#include <linux/rtnetlink.h>
+#include <linux/notifier.h>
+#include <linux/rcupdate.h>
+#include <linux/kernel.h>
+#include <net/net_namespace.h>
+#include <net/netns/ipv4.h>
+#include <net/ip_fib.h>
+
+static ATOMIC_NOTIFIER_HEAD(fib_chain);
+
+int call_fib_notifier(struct notifier_block *nb, struct net *net,
+ enum fib_event_type event_type,
+ struct fib_notifier_info *info)
+{
+ info->net = net;
+ return nb->notifier_call(nb, event_type, info);
+}
+
+int call_fib_notifiers(struct net *net, enum fib_event_type event_type,
+ struct fib_notifier_info *info)
+{
+ net->ipv4.fib_seq++;
+ info->net = net;
+ return atomic_notifier_call_chain(&fib_chain, event_type, info);
+}
+
+static unsigned int fib_seq_sum(void)
+{
+ unsigned int fib_seq = 0;
+ struct net *net;
+
+ rtnl_lock();
+ for_each_net(net)
+ fib_seq += net->ipv4.fib_seq;
+ rtnl_unlock();
+
+ return fib_seq;
+}
+
+static bool fib_dump_is_consistent(struct notifier_block *nb,
+ void (*cb)(struct notifier_block *nb),
+ unsigned int fib_seq)
+{
+ atomic_notifier_chain_register(&fib_chain, nb);
+ if (fib_seq == fib_seq_sum())
+ return true;
+ atomic_notifier_chain_unregister(&fib_chain, nb);
+ if (cb)
+ cb(nb);
+ return false;
+}
+
+#define FIB_DUMP_MAX_RETRIES 5
+int register_fib_notifier(struct notifier_block *nb,
+ void (*cb)(struct notifier_block *nb))
+{
+ int retries = 0;
+
+ do {
+ unsigned int fib_seq = fib_seq_sum();
+ struct net *net;
+
+ /* Mutex semantics guarantee that every change done to
+ * FIB tries before we read the change sequence counter
+ * is now visible to us.
+ */
+ rcu_read_lock();
+ for_each_net_rcu(net) {
+ fib_rules_notify(net, nb);
+ fib_notify(net, nb);
+ }
+ rcu_read_unlock();
+
+ if (fib_dump_is_consistent(nb, cb, fib_seq))
+ return 0;
+ } while (++retries < FIB_DUMP_MAX_RETRIES);
+
+ return -EBUSY;
+}
+EXPORT_SYMBOL(register_fib_notifier);
+
+int unregister_fib_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&fib_chain, nb);
+}
+EXPORT_SYMBOL(unregister_fib_notifier);
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 2e50062f642d..289210903d58 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -172,6 +172,14 @@ static int call_fib_rule_notifiers(struct net *net,
return call_fib_notifiers(net, event_type, &info);
}
+void fib_rules_notify(struct net *net, struct notifier_block *nb)
+{
+ struct fib_notifier_info info;
+
+ if (net->ipv4.fib_has_custom_rules)
+ call_fib_notifier(nb, net, FIB_EVENT_RULE_ADD, &info);
+}
+
static const struct nla_policy fib4_rule_policy[FRA_MAX+1] = {
FRA_GENERIC_POLICY,
[FRA_FLOW] = { .type = NLA_U32 },
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 2f0d8233950f..1201409ba1dc 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -84,43 +84,6 @@
#include <trace/events/fib.h>
#include "fib_lookup.h"
-static unsigned int fib_seq_sum(void)
-{
- unsigned int fib_seq = 0;
- struct net *net;
-
- rtnl_lock();
- for_each_net(net)
- fib_seq += net->ipv4.fib_seq;
- rtnl_unlock();
-
- return fib_seq;
-}
-
-static ATOMIC_NOTIFIER_HEAD(fib_chain);
-
-static int call_fib_notifier(struct notifier_block *nb, struct net *net,
- enum fib_event_type event_type,
- struct fib_notifier_info *info)
-{
- info->net = net;
- return nb->notifier_call(nb, event_type, info);
-}
-
-static void fib_rules_notify(struct net *net, struct notifier_block *nb,
- enum fib_event_type event_type)
-{
-#ifdef CONFIG_IP_MULTIPLE_TABLES
- struct fib_notifier_info info;
-
- if (net->ipv4.fib_has_custom_rules)
- call_fib_notifier(nb, net, event_type, &info);
-#endif
-}
-
-static void fib_notify(struct net *net, struct notifier_block *nb,
- enum fib_event_type event_type);
-
static int call_fib_entry_notifier(struct notifier_block *nb, struct net *net,
enum fib_event_type event_type, u32 dst,
int dst_len, struct fib_info *fi,
@@ -137,62 +100,6 @@ static int call_fib_entry_notifier(struct notifier_block *nb, struct net *net,
return call_fib_notifier(nb, net, event_type, &info.info);
}
-static bool fib_dump_is_consistent(struct notifier_block *nb,
- void (*cb)(struct notifier_block *nb),
- unsigned int fib_seq)
-{
- atomic_notifier_chain_register(&fib_chain, nb);
- if (fib_seq == fib_seq_sum())
- return true;
- atomic_notifier_chain_unregister(&fib_chain, nb);
- if (cb)
- cb(nb);
- return false;
-}
-
-#define FIB_DUMP_MAX_RETRIES 5
-int register_fib_notifier(struct notifier_block *nb,
- void (*cb)(struct notifier_block *nb))
-{
- int retries = 0;
-
- do {
- unsigned int fib_seq = fib_seq_sum();
- struct net *net;
-
- /* Mutex semantics guarantee that every change done to
- * FIB tries before we read the change sequence counter
- * is now visible to us.
- */
- rcu_read_lock();
- for_each_net_rcu(net) {
- fib_rules_notify(net, nb, FIB_EVENT_RULE_ADD);
- fib_notify(net, nb, FIB_EVENT_ENTRY_ADD);
- }
- rcu_read_unlock();
-
- if (fib_dump_is_consistent(nb, cb, fib_seq))
- return 0;
- } while (++retries < FIB_DUMP_MAX_RETRIES);
-
- return -EBUSY;
-}
-EXPORT_SYMBOL(register_fib_notifier);
-
-int unregister_fib_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_unregister(&fib_chain, nb);
-}
-EXPORT_SYMBOL(unregister_fib_notifier);
-
-int call_fib_notifiers(struct net *net, enum fib_event_type event_type,
- struct fib_notifier_info *info)
-{
- net->ipv4.fib_seq++;
- info->net = net;
- return atomic_notifier_call_chain(&fib_chain, event_type, info);
-}
-
static int call_fib_entry_notifiers(struct net *net,
enum fib_event_type event_type, u32 dst,
int dst_len, struct fib_info *fi,
@@ -1995,8 +1902,7 @@ int fib_table_flush(struct net *net, struct fib_table *tb)
}
static void fib_leaf_notify(struct net *net, struct key_vector *l,
- struct fib_table *tb, struct notifier_block *nb,
- enum fib_event_type event_type)
+ struct fib_table *tb, struct notifier_block *nb)
{
struct fib_alias *fa;
@@ -2012,22 +1918,21 @@ static void fib_leaf_notify(struct net *net, struct key_vector *l,
if (tb->tb_id != fa->tb_id)
continue;
- call_fib_entry_notifier(nb, net, event_type, l->key,
+ call_fib_entry_notifier(nb, net, FIB_EVENT_ENTRY_ADD, l->key,
KEYLENGTH - fa->fa_slen, fi, fa->fa_tos,
fa->fa_type, fa->tb_id);
}
}
static void fib_table_notify(struct net *net, struct fib_table *tb,
- struct notifier_block *nb,
- enum fib_event_type event_type)
+ struct notifier_block *nb)
{
struct trie *t = (struct trie *)tb->tb_data;
struct key_vector *l, *tp = t->kv;
t_key key = 0;
while ((l = leaf_walk_rcu(&tp, key)) != NULL) {
- fib_leaf_notify(net, l, tb, nb, event_type);
+ fib_leaf_notify(net, l, tb, nb);
key = l->key + 1;
/* stop in case of wrap around */
@@ -2036,8 +1941,7 @@ static void fib_table_notify(struct net *net, struct fib_table *tb,
}
}
-static void fib_notify(struct net *net, struct notifier_block *nb,
- enum fib_event_type event_type)
+void fib_notify(struct net *net, struct notifier_block *nb)
{
unsigned int h;
@@ -2046,7 +1950,7 @@ static void fib_notify(struct net *net, struct notifier_block *nb,
struct fib_table *tb;
hlist_for_each_entry_rcu(tb, head, tb_hlist)
- fib_table_notify(net, tb, nb, event_type);
+ fib_table_notify(net, tb, nb);
}
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-27 13:01:42 +0200