From: David Ahern <dsahern@xxxxxxxxx>
Convert uses of neigh_tables array to neigh_find_table. Maintain existing
family order using a new table_families array. A later patch removes the
neigh_tables array in favor of per-namespace accesses.
Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
---
net/core/neighbour.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index b60087d7c0bc..afb2ee985dd1 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -62,6 +62,19 @@ static int pneigh_ifdown_and_unlock(struct neigh_table *tbl,
static const struct seq_operations neigh_stat_seq_ops;
#endif
+/* used for table dumps to maintain the legacy order of
+ * ipv4, ipv6, decnet
+ */
+static int table_families[] = {
+ AF_INET,
+#if IS_ENABLED(CONFIG_IPV6)
+ AF_INET6,
+#endif
+#if IS_ENABLED(CONFIG_DECNET)
+ AF_DECnet,
+#endif
+};
+
/*
Neighbour hash table buckets are protected with rwlock tbl->lock.
@@ -2046,8 +2059,8 @@ static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh,
ndtmsg = nlmsg_data(nlh);
- for (tidx = 0; tidx < NEIGH_NR_TABLES; tidx++) {
- tbl = neigh_tables[tidx];
+ for (tidx = 0; tidx < ARRAY_SIZE(table_families); tidx++) {
+ tbl = neigh_find_table(net, table_families[tidx]);
if (!tbl)
continue;
if (ndtmsg->ndtm_family && tbl->family != ndtmsg->ndtm_family)
@@ -2195,10 +2208,10 @@ static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family;
- for (tidx = 0; tidx < NEIGH_NR_TABLES; tidx++) {
+ for (tidx = 0; tidx < ARRAY_SIZE(table_families); tidx++) {
struct neigh_parms *p;
- tbl = neigh_tables[tidx];
+ tbl = neigh_find_table(net, table_families[tidx]);
if (!tbl)
continue;
@@ -2453,6 +2466,7 @@ static int pneigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct net *net = sock_net(skb->sk);
struct neigh_table *tbl;
int t, family, s_t;
int proxy = 0;
@@ -2469,9 +2483,8 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
s_t = cb->args[0];
- for (t = 0; t < NEIGH_NR_TABLES; t++) {
- tbl = neigh_tables[t];
-
+ for (t = 0; t < ARRAY_SIZE(table_families); t++) {
+ tbl = neigh_find_table(net, table_families[t]);
if (!tbl)
continue;
if (t < s_t || (family && tbl->family != family))
--
2.11.0
--
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