ipv4: Remember FIB alias list head and table in lookup results.
This will be used later to implement fib_select_default() in a
completely generic manner, instead of the current situation where the
default route is re-looked up in the TRIE/HASH table and then the
available aliases are analyzed.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index b3acb04..0a88866 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -288,7 +288,7 @@
if (f->fn_key != k)
continue;
- err = fib_semantic_match(&f->fn_alias,
+ err = fib_semantic_match(tb, &f->fn_alias,
flp, res,
fz->fz_order, fib_flags);
if (err <= 0)
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index c079cc0..d5c40d8 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -25,7 +25,7 @@
}
/* Exported by fib_semantics.c */
-extern int fib_semantic_match(struct list_head *head,
+extern int fib_semantic_match(struct fib_table *tb, struct list_head *head,
const struct flowi *flp,
struct fib_result *res, int prefixlen, int fib_flags);
extern void fib_release_info(struct fib_info *);
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 48e93a5..1bf6fb9 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -889,8 +889,9 @@
}
/* Note! fib_semantic_match intentionally uses RCU list functions. */
-int fib_semantic_match(struct list_head *head, const struct flowi *flp,
- struct fib_result *res, int prefixlen, int fib_flags)
+int fib_semantic_match(struct fib_table *tb, struct list_head *head,
+ const struct flowi *flp, struct fib_result *res,
+ int prefixlen, int fib_flags)
{
struct fib_alias *fa;
int nh_sel = 0;
@@ -954,6 +955,8 @@
res->type = fa->fa_type;
res->scope = fa->fa_scope;
res->fi = fa->fa_info;
+ res->table = tb;
+ res->fa_head = head;
if (!(fib_flags & FIB_LOOKUP_NOREF))
atomic_inc(&res->fi->fib_clntref);
return 0;
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 0f28034..8cee5c8 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1340,7 +1340,7 @@
}
/* should be called with rcu_read_lock */
-static int check_leaf(struct trie *t, struct leaf *l,
+static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l,
t_key key, const struct flowi *flp,
struct fib_result *res, int fib_flags)
{
@@ -1356,7 +1356,7 @@
if (l->key != (key & ntohl(mask)))
continue;
- err = fib_semantic_match(&li->falh, flp, res, plen, fib_flags);
+ err = fib_semantic_match(tb, &li->falh, flp, res, plen, fib_flags);
#ifdef CONFIG_IP_FIB_TRIE_STATS
if (err <= 0)
@@ -1398,7 +1398,7 @@
/* Just a leaf? */
if (IS_LEAF(n)) {
- ret = check_leaf(t, (struct leaf *)n, key, flp, res, fib_flags);
+ ret = check_leaf(tb, t, (struct leaf *)n, key, flp, res, fib_flags);
goto found;
}
@@ -1423,7 +1423,7 @@
}
if (IS_LEAF(n)) {
- ret = check_leaf(t, (struct leaf *)n, key, flp, res, fib_flags);
+ ret = check_leaf(tb, t, (struct leaf *)n, key, flp, res, fib_flags);
if (ret > 0)
goto backtrace;
goto found;