summaryrefslogtreecommitdiff
path: root/net/ipv4/fib_semantics.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/fib_semantics.c')
-rw-r--r--net/ipv4/fib_semantics.c41
1 files changed, 30 insertions, 11 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index c7358ea4ae93..3a06586b170c 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1202,23 +1202,40 @@ int fib_sync_down_dev(struct net_device *dev, unsigned long event)
}
/* Must be invoked inside of an RCU protected region. */
-void fib_select_default(struct fib_result *res)
+void fib_select_default(const struct flowi4 *flp, struct fib_result *res)
{
struct fib_info *fi = NULL, *last_resort = NULL;
struct hlist_head *fa_head = res->fa_head;
struct fib_table *tb = res->table;
+ u8 slen = 32 - res->prefixlen;
int order = -1, last_idx = -1;
- struct fib_alias *fa;
+ struct fib_alias *fa, *fa1 = NULL;
+ u32 last_prio = res->fi->fib_priority;
+ u8 last_tos = 0;
hlist_for_each_entry_rcu(fa, fa_head, fa_list) {
struct fib_info *next_fi = fa->fa_info;
+ if (fa->fa_slen != slen)
+ continue;
+ if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos)
+ continue;
+ if (fa->tb_id != tb->tb_id)
+ continue;
+ if (next_fi->fib_priority > last_prio &&
+ fa->fa_tos == last_tos) {
+ if (last_tos)
+ continue;
+ break;
+ }
+ if (next_fi->fib_flags & RTNH_F_DEAD)
+ continue;
+ last_tos = fa->fa_tos;
+ last_prio = next_fi->fib_priority;
+
if (next_fi->fib_scope != res->scope ||
fa->fa_type != RTN_UNICAST)
continue;
-
- if (next_fi->fib_priority > res->fi->fib_priority)
- break;
if (!next_fi->fib_nh[0].nh_gw ||
next_fi->fib_nh[0].nh_scope != RT_SCOPE_LINK)
continue;
@@ -1228,10 +1245,11 @@ void fib_select_default(struct fib_result *res)
if (!fi) {
if (next_fi != res->fi)
break;
+ fa1 = fa;
} else if (!fib_detect_death(fi, order, &last_resort,
- &last_idx, tb->tb_default)) {
+ &last_idx, fa1->fa_default)) {
fib_result_assign(res, fi);
- tb->tb_default = order;
+ fa1->fa_default = order;
goto out;
}
fi = next_fi;
@@ -1239,20 +1257,21 @@ void fib_select_default(struct fib_result *res)
}
if (order <= 0 || !fi) {
- tb->tb_default = -1;
+ if (fa1)
+ fa1->fa_default = -1;
goto out;
}
if (!fib_detect_death(fi, order, &last_resort, &last_idx,
- tb->tb_default)) {
+ fa1->fa_default)) {
fib_result_assign(res, fi);
- tb->tb_default = order;
+ fa1->fa_default = order;
goto out;
}
if (last_idx >= 0)
fib_result_assign(res, last_resort);
- tb->tb_default = last_idx;
+ fa1->fa_default = last_idx;
out:
return;
}