[PATCH net-next v3 09/11] wireguard: netlink: convert to split ops

Asbjørn Sloth Tønnesen
2025-11-05T18:33:04Z

This patch converts wireguard from using legacy struct genl_ops
to struct genl_split_ops, by applying the same transformation
as genl_cmd_full_to_split() would otherwise do at runtime.

WGDEVICE_A_MAX is swapped for WGDEVICE_A_PEERS, while they are
currently equivalent, then .maxattr should be the maximum attribute
that a given command supports, which might not be WGDEVICE_A_MAX.

This is an incremental step towards adopting netlink policy code
generated by ynl-gen, ensuring that the code and spec is aligned.

This is a trivial patch with no behavioural changes intended.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
---
drivers/net/wireguard/netlink.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireguard/netlink.c b/drivers/net/wireguard/netlink.c
index f9bed135000f..7fecc25bd781 100644
--- a/drivers/net/wireguard/netlink.c
+++ b/drivers/net/wireguard/netlink.c
@@ -616,28 +616,30 @@ static int wg_set_device(struct sk_buff *skb, struct genl_info *info)
return ret;
}

-static const struct genl_ops genl_ops[] = {
+static const struct genl_split_ops wireguard_nl_ops[] = {
{
.cmd = WG_CMD_GET_DEVICE,
.start = wg_get_device_start,
.dumpit = wg_get_device_dump,
.done = wg_get_device_done,
- .flags = GENL_UNS_ADMIN_PERM
+ .policy = device_policy,
+ .maxattr = WGDEVICE_A_PEERS,
+ .flags = GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DUMP,
}, {
.cmd = WG_CMD_SET_DEVICE,
.doit = wg_set_device,
- .flags = GENL_UNS_ADMIN_PERM
+ .policy = device_policy,
+ .maxattr = WGDEVICE_A_PEERS,
+ .flags = GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DO,
}
};

static struct genl_family genl_family __ro_after_init = {
- .ops = genl_ops,
- .n_ops = ARRAY_SIZE(genl_ops),
+ .split_ops = wireguard_nl_ops,
+ .n_split_ops = ARRAY_SIZE(wireguard_nl_ops),
.name = WG_GENL_NAME,
.version = WG_GENL_VERSION,
- .maxattr = WGDEVICE_A_MAX,
.module = THIS_MODULE,
- .policy = device_policy,
.netnsok = true
};

--
2.51.0