[PATCH v3 net-next 6/6] vxlan: no longer rely on RTNL in vxlan_fill_info()
From: Eric Dumazet <edumazet@google.com>
Date: 2026-09-11 06:22:09
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Now that vxlan->cfg is RCU-protected, we can update vxlan_fill_info() to run under RCU read lock instead of relying on RTNL. This completes the transition to RTNL-less link info dumping for VXLAN. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> --- drivers/net/vxlan/vxlan_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 8b7558eac049d2f83ab5f68aca2dad62bce9cbc7..8f008ec6d2e98dc015649fd6e26a1346012c2238 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c@@ -4725,7 +4725,8 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) struct ifla_vxlan_port_range ports; const struct vxlan_config *cfg; - cfg = rtnl_dereference(vxlan->cfg); + rcu_read_lock(); + cfg = rcu_dereference(vxlan->cfg); if (nla_put_u32(skb, IFLA_VXLAN_ID, be32_to_cpu(cfg->vni))) goto nla_put_failure;
@@ -4824,9 +4825,11 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev) &cfg->reserved_bits)) goto nla_put_failure; + rcu_read_unlock(); return 0; nla_put_failure: + rcu_read_unlock(); return -EMSGSIZE; }
--
2.55.0.1007.g17ff1f9808-goog