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Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c18
-rw-r--r--net/core/link_watch.c7
-rw-r--r--net/core/rtnetlink.c44
3 files changed, 41 insertions, 28 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 13d00fc10f55..45a8c3dd4a64 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6557,18 +6557,22 @@ static void __napi_hash_add_with_id(struct napi_struct *napi,
static void napi_hash_add_with_id(struct napi_struct *napi,
unsigned int napi_id)
{
- spin_lock(&napi_hash_lock);
+ unsigned long flags;
+
+ spin_lock_irqsave(&napi_hash_lock, flags);
WARN_ON_ONCE(napi_by_id(napi_id));
__napi_hash_add_with_id(napi, napi_id);
- spin_unlock(&napi_hash_lock);
+ spin_unlock_irqrestore(&napi_hash_lock, flags);
}
static void napi_hash_add(struct napi_struct *napi)
{
+ unsigned long flags;
+
if (test_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state))
return;
- spin_lock(&napi_hash_lock);
+ spin_lock_irqsave(&napi_hash_lock, flags);
/* 0..NR_CPUS range is reserved for sender_cpu use */
do {
@@ -6578,7 +6582,7 @@ static void napi_hash_add(struct napi_struct *napi)
__napi_hash_add_with_id(napi, napi_gen_id);
- spin_unlock(&napi_hash_lock);
+ spin_unlock_irqrestore(&napi_hash_lock, flags);
}
/* Warning : caller is responsible to make sure rcu grace period
@@ -6586,11 +6590,13 @@ static void napi_hash_add(struct napi_struct *napi)
*/
static void napi_hash_del(struct napi_struct *napi)
{
- spin_lock(&napi_hash_lock);
+ unsigned long flags;
+
+ spin_lock_irqsave(&napi_hash_lock, flags);
hlist_del_init_rcu(&napi->napi_hash_node);
- spin_unlock(&napi_hash_lock);
+ spin_unlock_irqrestore(&napi_hash_lock, flags);
}
static enum hrtimer_restart napi_watchdog(struct hrtimer *timer)
diff --git a/net/core/link_watch.c b/net/core/link_watch.c
index ab150641142a..1b4d39e38084 100644
--- a/net/core/link_watch.c
+++ b/net/core/link_watch.c
@@ -45,9 +45,14 @@ static unsigned int default_operstate(const struct net_device *dev)
int iflink = dev_get_iflink(dev);
struct net_device *peer;
- if (iflink == dev->ifindex)
+ /* If called from netdev_run_todo()/linkwatch_sync_dev(),
+ * dev_net(dev) can be already freed, and RTNL is not held.
+ */
+ if (dev->reg_state == NETREG_UNREGISTERED ||
+ iflink == dev->ifindex)
return IF_OPER_DOWN;
+ ASSERT_RTNL();
peer = __dev_get_by_index(dev_net(dev), iflink);
if (!peer)
return IF_OPER_DOWN;
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 58df76fe408a..ab5f201bf0ab 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3746,6 +3746,7 @@ static int rtnl_group_changelink(const struct sk_buff *skb,
static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
const struct rtnl_link_ops *ops,
struct net *tgt_net, struct net *link_net,
+ struct net *peer_net,
const struct nlmsghdr *nlh,
struct nlattr **tb, struct nlattr **data,
struct netlink_ext_ack *extack)
@@ -3776,8 +3777,13 @@ static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
dev->ifindex = ifm->ifi_index;
+ if (link_net)
+ net = link_net;
+ if (peer_net)
+ net = peer_net;
+
if (ops->newlink)
- err = ops->newlink(link_net ? : net, dev, tb, data, extack);
+ err = ops->newlink(net, dev, tb, data, extack);
else
err = register_netdevice(dev);
if (err < 0) {
@@ -3812,40 +3818,33 @@ out_unregister:
goto out;
}
-static int rtnl_add_peer_net(struct rtnl_nets *rtnl_nets,
- const struct rtnl_link_ops *ops,
- struct nlattr *data[],
- struct netlink_ext_ack *extack)
+static struct net *rtnl_get_peer_net(const struct rtnl_link_ops *ops,
+ struct nlattr *data[],
+ struct netlink_ext_ack *extack)
{
struct nlattr *tb[IFLA_MAX + 1];
- struct net *net;
int err;
if (!data || !data[ops->peer_type])
- return 0;
+ return NULL;
err = rtnl_nla_parse_ifinfomsg(tb, data[ops->peer_type], extack);
if (err < 0)
- return err;
+ return ERR_PTR(err);
if (ops->validate) {
err = ops->validate(tb, NULL, extack);
if (err < 0)
- return err;
+ return ERR_PTR(err);
}
- net = rtnl_link_get_net_ifla(tb);
- if (IS_ERR(net))
- return PTR_ERR(net);
- if (net)
- rtnl_nets_add(rtnl_nets, net);
-
- return 0;
+ return rtnl_link_get_net_ifla(tb);
}
static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
const struct rtnl_link_ops *ops,
struct net *tgt_net, struct net *link_net,
+ struct net *peer_net,
struct rtnl_newlink_tbs *tbs,
struct nlattr **data,
struct netlink_ext_ack *extack)
@@ -3894,14 +3893,15 @@ static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
return -EOPNOTSUPP;
}
- return rtnl_newlink_create(skb, ifm, ops, tgt_net, link_net, nlh, tb, data, extack);
+ return rtnl_newlink_create(skb, ifm, ops, tgt_net, link_net, peer_net, nlh,
+ tb, data, extack);
}
static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
+ struct net *tgt_net, *link_net = NULL, *peer_net = NULL;
struct nlattr **tb, **linkinfo, **data = NULL;
- struct net *tgt_net, *link_net = NULL;
struct rtnl_link_ops *ops = NULL;
struct rtnl_newlink_tbs *tbs;
struct rtnl_nets rtnl_nets;
@@ -3971,9 +3971,11 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
}
if (ops->peer_type) {
- ret = rtnl_add_peer_net(&rtnl_nets, ops, data, extack);
- if (ret < 0)
+ peer_net = rtnl_get_peer_net(ops, data, extack);
+ if (IS_ERR(peer_net))
goto put_ops;
+ if (peer_net)
+ rtnl_nets_add(&rtnl_nets, peer_net);
}
}
@@ -4004,7 +4006,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
}
rtnl_nets_lock(&rtnl_nets);
- ret = __rtnl_newlink(skb, nlh, ops, tgt_net, link_net, tbs, data, extack);
+ ret = __rtnl_newlink(skb, nlh, ops, tgt_net, link_net, peer_net, tbs, data, extack);
rtnl_nets_unlock(&rtnl_nets);
put_net:
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-07-19 01:29:45 +0000