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path: root/net/ipv4/fib_trie.c
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Diffstat (limited to 'net/ipv4/fib_trie.c')
-rw-r--r--net/ipv4/fib_trie.c34
1 files changed, 23 insertions, 11 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index cfb249cc0a5..1e589b91605 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1989,6 +1989,10 @@ static struct node *fib_trie_get_next(struct fib_trie_iter *iter)
unsigned cindex = iter->index;
struct tnode *p;
+ /* A single entry routing table */
+ if (!tn)
+ return NULL;
+
pr_debug("get_next iter={node=%p index=%d depth=%d}\n",
iter->tnode, iter->index, iter->depth);
rescan:
@@ -2037,11 +2041,18 @@ static struct node *fib_trie_get_first(struct fib_trie_iter *iter,
if(!iter)
return NULL;
- if (n && IS_TNODE(n)) {
- iter->tnode = (struct tnode *) n;
- iter->trie = t;
- iter->index = 0;
- iter->depth = 1;
+ if (n) {
+ if (IS_TNODE(n)) {
+ iter->tnode = (struct tnode *) n;
+ iter->trie = t;
+ iter->index = 0;
+ iter->depth = 1;
+ } else {
+ iter->tnode = NULL;
+ iter->trie = t;
+ iter->index = 0;
+ iter->depth = 0;
+ }
return n;
}
return NULL;
@@ -2279,16 +2290,17 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
if (v == SEQ_START_TOKEN)
return 0;
+ if (!NODE_PARENT(n)) {
+ if (iter->trie == trie_local)
+ seq_puts(seq, "<local>:\n");
+ else
+ seq_puts(seq, "<main>:\n");
+ }
+
if (IS_TNODE(n)) {
struct tnode *tn = (struct tnode *) n;
__be32 prf = htonl(MASK_PFX(tn->key, tn->pos));
- if (!NODE_PARENT(n)) {
- if (iter->trie == trie_local)
- seq_puts(seq, "<local>:\n");
- else
- seq_puts(seq, "<main>:\n");
- }
seq_indent(seq, iter->depth-1);
seq_printf(seq, " +-- %d.%d.%d.%d/%d %d %d %d\n",
NIPQUAD(prf), tn->pos, tn->bits, tn->full_children,