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ipv4: Remove old route notifications and convert listeners

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Unlike mlxsw, the other listeners to the FIB notification chain do not
require any special modifications as they never considered multiple
identical routes.

This patch removes the old route notifications and converts all the
listeners to use the new replace / delete notifications.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel
2019-12-14 17:53:15 +02:00
committed by David S. Miller
parent b6a1d871d3
commit 446f739104
6 changed files with 16 additions and 47 deletions
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38
net/ipv4/fib_trie.c
View File

@@ -1127,7 +1127,6 @@ static void fib_remove_alias(struct trie *t, struct key_vector *tp,
int fib_table_insert(struct net *net, struct fib_table *tb,
struct fib_config *cfg, struct netlink_ext_ack *extack)
{
enum fib_event_type event = FIB_EVENT_ENTRY_ADD;
struct trie *t = (struct trie *)tb->tb_data;
struct fib_alias *fa, *new_fa;
struct key_vector *l, *tp;
@@ -1226,19 +1225,13 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
tb->tb_id, true) == fa) {
enum fib_event_type fib_event;
fib_event = FIB_EVENT_ENTRY_REPLACE_TMP;
fib_event = FIB_EVENT_ENTRY_REPLACE;
err = call_fib_entry_notifiers(net, fib_event,
key, plen,
new_fa, extack);
if (err)
goto out_free_new_fa;
}
err = call_fib_entry_notifiers(net,
FIB_EVENT_ENTRY_REPLACE,
key, plen, new_fa,
extack);
if (err)
goto out_free_new_fa;
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen,
tb->tb_id, &cfg->fc_nlinfo, nlflags);
@@ -1260,12 +1253,10 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
if (fa_match)
goto out;
if (cfg->fc_nlflags & NLM_F_APPEND) {
event = FIB_EVENT_ENTRY_APPEND;
if (cfg->fc_nlflags & NLM_F_APPEND)
nlflags |= NLM_F_APPEND;
} else {
else
fa = fa_first;
}
}
err = -ENOENT;
if (!(cfg->fc_nlflags & NLM_F_CREATE))
@@ -1299,15 +1290,12 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
new_fa) {
enum fib_event_type fib_event;
fib_event = FIB_EVENT_ENTRY_REPLACE_TMP;
fib_event = FIB_EVENT_ENTRY_REPLACE;
err = call_fib_entry_notifiers(net, fib_event, key, plen,
new_fa, extack);
if (err)
goto out_remove_new_fa;
}
err = call_fib_entry_notifiers(net, event, key, plen, new_fa, extack);
if (err)
goto out_remove_new_fa;
if (!plen)
tb->tb_num_default++;
@@ -1590,10 +1578,10 @@ static void fib_notify_alias_delete(struct net *net, u32 key,
fa_next = hlist_entry_safe(fa_to_delete->fa_list.next,
struct fib_alias, fa_list);
if (fa_next && fa_next->fa_slen == slen && fa_next->tb_id == tb_id) {
fib_event = FIB_EVENT_ENTRY_REPLACE_TMP;
fib_event = FIB_EVENT_ENTRY_REPLACE;
fa_to_notify = fa_next;
} else {
fib_event = FIB_EVENT_ENTRY_DEL_TMP;
fib_event = FIB_EVENT_ENTRY_DEL;
fa_to_notify = fa_to_delete;
}
call_fib_entry_notifiers(net, fib_event, key, KEYLENGTH - slen,
@@ -1654,8 +1642,6 @@ int fib_table_delete(struct net *net, struct fib_table *tb,
return -ESRCH;
fib_notify_alias_delete(net, key, &l->leaf, fa_to_delete, extack);
call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, key, plen,
fa_to_delete, extack);
rtmsg_fib(RTM_DELROUTE, htonl(key), fa_to_delete, plen, tb->tb_id,
&cfg->fc_nlinfo, 0);
@@ -1981,10 +1967,6 @@ int fib_table_flush(struct net *net, struct fib_table *tb, bool flush_all)
fib_notify_alias_delete(net, n->key, &n->leaf, fa,
NULL);
call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_DEL,
n->key,
KEYLENGTH - fa->fa_slen, fa,
NULL);
hlist_del_rcu(&fa->fa_list);
fib_release_info(fa->fa_info);
alias_free_mem_rcu(fa);
@@ -2095,17 +2077,11 @@ static int fib_leaf_notify(struct key_vector *l, struct fib_table *tb,
if (tb->tb_id != fa->tb_id)
continue;
err = call_fib_entry_notifier(nb, FIB_EVENT_ENTRY_ADD, l->key,
KEYLENGTH - fa->fa_slen,
fa, extack);
if (err)
return err;
if (fa->fa_slen == last_slen)
continue;
last_slen = fa->fa_slen;
err = call_fib_entry_notifier(nb, FIB_EVENT_ENTRY_REPLACE_TMP,
err = call_fib_entry_notifier(nb, FIB_EVENT_ENTRY_REPLACE,
l->key, KEYLENGTH - fa->fa_slen,
fa, extack);
if (err)