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net: add new helper unregister_netdevice_many_notify

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Add new helper unregister_netdevice_many_notify(), pass netlink message
header and portid, which could be used to notify userspace when flag
NLM_F_ECHO is set.

Make the unregister_netdevice_many() as a wrapper of new function
unregister_netdevice_many_notify().

Suggested-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Hangbin Liu 2022-10-28 04:42:22 -04:00 committed by Jakub Kicinski
parent 1d997f1013
commit 77f4aa9a2a
2 changed files with 20 additions and 10 deletions
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27
net/core/dev.c
View File

@ -10781,14 +10781,8 @@ void unregister_netdevice_queue(struct net_device *dev, struct list_head *head)
}
EXPORT_SYMBOL(unregister_netdevice_queue);
/**
* unregister_netdevice_many - unregister many devices
* @head: list of devices
*
* Note: As most callers use a stack allocated list_head,
* we force a list_del() to make sure stack wont be corrupted later.
*/
void unregister_netdevice_many(struct list_head *head)
void unregister_netdevice_many_notify(struct list_head *head,
u32 portid, const struct nlmsghdr *nlh)
{
struct net_device *dev, *tmp;
LIST_HEAD(close_head);
@ -10850,7 +10844,8 @@ void unregister_netdevice_many(struct list_head *head)
if (!dev->rtnl_link_ops ||
dev->rtnl_link_state == RTNL_LINK_INITIALIZED)
skb = rtmsg_ifinfo_build_skb(RTM_DELLINK, dev, ~0U, 0,
GFP_KERNEL, NULL, 0, 0, 0);
GFP_KERNEL, NULL, 0,
portid, nlmsg_seq(nlh));
/*
* Flush the unicast and multicast chains
@ -10865,7 +10860,7 @@ void unregister_netdevice_many(struct list_head *head)
dev->netdev_ops->ndo_uninit(dev);
if (skb)
rtmsg_ifinfo_send(skb, dev, GFP_KERNEL, 0, NULL);
rtmsg_ifinfo_send(skb, dev, GFP_KERNEL, portid, nlh);
/* Notifier chain MUST detach us all upper devices. */
WARN_ON(netdev_has_any_upper_dev(dev));
@ -10888,6 +10883,18 @@ void unregister_netdevice_many(struct list_head *head)
list_del(head);
}
/**
* unregister_netdevice_many - unregister many devices
* @head: list of devices
*
* Note: As most callers use a stack allocated list_head,
* we force a list_del() to make sure stack wont be corrupted later.
*/
void unregister_netdevice_many(struct list_head *head)
{
unregister_netdevice_many_notify(head, 0, NULL);
}
EXPORT_SYMBOL(unregister_netdevice_many);
/**

3
net/core/dev.h
View File

@ -92,6 +92,9 @@ void __dev_notify_flags(struct net_device *dev, unsigned int old_flags,
unsigned int gchanges, u32 portid,
const struct nlmsghdr *nlh);
void unregister_netdevice_many_notify(struct list_head *head,
u32 portid, const struct nlmsghdr *nlh);
static inline void netif_set_gso_max_size(struct net_device *dev,
unsigned int size)
{