Thread (15 messages) 15 messages, 2 authors, 2025-01-14

Re: [PATCH net-next v8 06/11] net: ipv6: Use link netns in newlink() of rtnl_link_ops

From: Kuniyuki Iwashima <hidden>
Date: 2025-01-14 04:49:59
Also in: batman, bpf, bridge, linux-can, linux-kselftest, linux-rdma, linux-wireless, lkml

From: Xiao Liang <redacted>
Date: Mon, 13 Jan 2025 22:37:14 +0800
quoted hunk ↗ jump to hunk
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index 2a6a424806aa..ac5e402c34bc 100644
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -564,10 +564,12 @@ static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
 	return 0;
 }
 
-static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
-			struct nlattr *tb[], struct nlattr *data[],
+static int bond_newlink(struct net_device *bond_dev,
+			struct rtnl_newlink_params *params,
 			struct netlink_ext_ack *extack)
 {
+	struct nlattr **data = params->data;
+	struct nlattr **tb = params->tb;
 	int err;
 
 	err = bond_changelink(bond_dev, tb, data, extack);
Note that IFLA_BOND_ACTIVE_SLAVE uses dev_net(dev) for
__dev_get_by_index().


[...]
quoted hunk ↗ jump to hunk
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index fed4fe2a4748..0c496aa1f706 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1565,11 +1565,12 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(macvlan_common_newlink);
 
-static int macvlan_newlink(struct net *src_net, struct net_device *dev,
-			   struct nlattr *tb[], struct nlattr *data[],
+static int macvlan_newlink(struct net_device *dev,
+			   struct rtnl_newlink_params *params,
 			   struct netlink_ext_ack *extack)
 {
-	return macvlan_common_newlink(src_net, dev, tb, data, extack);
+	return macvlan_common_newlink(params->net, dev, params->tb,
+				      params->data, extack);
Pass params as is as you did for ipvlan_link_new().

Same for macvtap_newlink().


[...]
quoted hunk ↗ jump to hunk
diff --git a/drivers/net/netkit.c b/drivers/net/netkit.c
index 1e1b00756be7..1e9eadc77da2 100644
--- a/drivers/net/netkit.c
+++ b/drivers/net/netkit.c
@@ -327,10 +327,13 @@ static int netkit_validate(struct nlattr *tb[], struct nlattr *data[],
 
 static struct rtnl_link_ops netkit_link_ops;
 
-static int netkit_new_link(struct net *peer_net, struct net_device *dev,
-			   struct nlattr *tb[], struct nlattr *data[],
+static int netkit_new_link(struct net_device *dev,
+			   struct rtnl_newlink_params *params,
 			   struct netlink_ext_ack *extack)
 {
+	struct nlattr **data = params->data;
+	struct net *peer_net = params->net;
+	struct nlattr **tb = params->tb;
nit: please keep the reverse xmas tree order.

 	struct nlattr *peer_tb[IFLA_MAX + 1], **tbp = tb, *attr;
you can define *tbp here and initialise it later.

  	struct nlattr *peer_tb[IFLA_MAX + 1], **tbp, *attr;
 	enum netkit_action policy_prim = NETKIT_PASS;
 	enum netkit_action policy_peer = NETKIT_PASS;

[...]
quoted hunk ↗ jump to hunk
@@ -1064,6 +1067,11 @@ static void wwan_create_default_link(struct wwan_device *wwandev,
 	struct net_device *dev;
 	struct nlmsghdr *nlh;
 	struct sk_buff *msg;
+	struct rtnl_newlink_params params = {
+		.net = &init_net,
+		.tb = tb,
+		.data = data,
+	};
nit: Reverse xmas tree order


[...]
quoted hunk ↗ jump to hunk
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index ec98349b9620..7ff5e96f6ba7 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3766,6 +3766,14 @@ static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
 	struct net_device *dev;
 	char ifname[IFNAMSIZ];
 	int err;
+	struct rtnl_newlink_params params = {
nit: Reverse xmas tree order

+		.net = net,
Use sock_net(skb->sk) directly here and remove net defined above,
which is no longer used in this function.

---8<---
        unsigned char name_assign_type = NET_NAME_USER;
        struct rtnl_newlink_params params = {
                .net = sock_net(skb->sk),
                .src_net = net,
                .link_net = link_net,
                .peer_net = peer_net,
                .tb = tb,
                .data = data,
        };
        u32 portid = NETLINK_CB(skb).portid;
---8<---


[...]
quoted hunk ↗ jump to hunk
@@ -1698,6 +1702,10 @@ struct net_device *gretap_fb_dev_create(struct net *net, const char *name,
 	LIST_HEAD(list_kill);
 	struct ip_tunnel *t;
 	int err;
+	struct rtnl_newlink_params params = {
+		.net = net,
+		.tb = tb,
+	};
 
 	memset(&tb, 0, sizeof(tb));
nit: Reverse xmas tree
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