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authorLahav Schlesinger <lschlesinger@drivenets.com>2021-08-10 09:06:58 +0000
committerJakub Kicinski <kuba@kernel.org>2021-08-10 16:03:34 -0700
commitd3432bf10f17bd8ef7d6ca0a268f63bfb0c3d372 (patch)
treeaa070171743df8266ee530f70e8f448ee6267e89 /net/core/neighbour.c
parenta5397d68b2dbdb8f725ab2ff420171fbde39dbe5 (diff)
net: Support filtering interfaces on no master
Currently there's support for filtering neighbours/links for interfaces which have a specific master device (using the IFLA_MASTER/NDA_MASTER attributes). This patch adds support for filtering interfaces/neighbours dump for interfaces that *don't* have a master. Signed-off-by: Lahav Schlesinger <lschlesinger@drivenets.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20210810090658.2778960-1-lschlesinger@drivenets.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core/neighbour.c')
-rw-r--r--net/core/neighbour.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index b963d6b02c4f..2d5bc3a75fae 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2528,6 +2528,13 @@ static bool neigh_master_filtered(struct net_device *dev, int master_idx)
return false;
master = dev ? netdev_master_upper_dev_get(dev) : NULL;
+
+ /* 0 is already used to denote NDA_MASTER wasn't passed, therefore need another
+ * invalid value for ifindex to denote "no master".
+ */
+ if (master_idx == -1)
+ return !!master;
+
if (!master || master->ifindex != master_idx)
return true;