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Date: Wed, 31 Aug 2022 13:16:50 +0300
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Sevinj Aghayeva <sevinj.aghayeva@...il.com>
Cc: netdev@...r.kernel.org, aroulin@...dia.com, sbrivio@...hat.com,
roopa@...dia.com, "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
bridge@...ts.linux-foundation.org
Subject: Re: [PATCH RFC net-next 0/3] net: vlan: fix bridge binding behavior
and add selftests
On 29/08/2022 23:22, Sevinj Aghayeva wrote:
> Hi Nik,
>
> Please see below.
>
> I had to export call_netdev_notifiers_info. Also, I wanted to define the vlan-specific detail change struct in if_vlan.h and then include if_vlan.h from netdevice.h, where the netdev_notifier_change_details_info struct was defined, but I found out that I cannot include if_vlan.h in netdevice.h. After consulting with Andy I added a new file for the netdev_notifier_change_details_info. Again, I will send out a proper RFC patch once we sort out the details.
>
Hi,
Please don't top post on netdev@. Sounds ok to me, just break it into separate logical pieces
and please finally send a complete RFC series, reviewing pieces like this is not preferrable.
A few comments below.
> diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
> index 2be4dd7e90a9..ad0eddf1386f 100644
> --- a/include/linux/if_vlan.h
> +++ b/include/linux/if_vlan.h
> @@ -37,6 +37,10 @@ struct vlan_hdr {
> __be16 h_vlan_encapsulated_proto;
> };
>
> +struct vlan_change_details {
> + bool bridge_binding;
> +};
> +
> /**
> * struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr)
> * @h_dest: destination ethernet address
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 2563d30736e9..ba4746f05d7f 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -2762,6 +2762,7 @@ enum netdev_cmd {
> NETDEV_UNREGISTER,
> NETDEV_CHANGEMTU, /* notify after mtu change happened */
> NETDEV_CHANGEADDR, /* notify after the address change */
> + NETDEV_CHANGE_DETAILS,
> NETDEV_PRE_CHANGEADDR, /* notify before the address change */
> NETDEV_GOING_DOWN,
> NETDEV_CHANGENAME,
> @@ -2898,6 +2899,8 @@ netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
> }
>
> int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
> +int call_netdevice_notifiers_info(unsigned long val,
> + struct netdev_notifier_info *info);
>
>
> extern rwlock_t dev_base_lock; /* Device list lock */
> diff --git a/include/linux/notifier_info.h b/include/linux/notifier_info.h
> new file mode 100644
> index 000000000000..c103240588dc
> --- /dev/null
> +++ b/include/linux/notifier_info.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +
> +#ifndef _LINUX_NOTIFIER_INFO_H_
> +#define _LINUX_NOTIFIER_INFO_H_
> +
> +#include <linux/netdevice.h>
> +#include <linux/if_vlan.h>
> +
You can add a comment here about how the struct would be used
> +struct netdev_notifier_change_details_info {
> + struct netdev_notifier_info info; /* must be first */
> + union {
> + struct vlan_change_details vlan;
> + } details;
union can be anonymous, no need to add another name here
> +};
> +
> +#endif /* !(_LINUX_NOTIFIER_INFO_H_) */
> diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
> index 5eaf38875554..71947cdcfaaa 100644
> --- a/net/8021q/vlan.h
> +++ b/net/8021q/vlan.h
> @@ -130,7 +130,7 @@ void vlan_dev_set_ingress_priority(const struct net_device *dev,
> int vlan_dev_set_egress_priority(const struct net_device *dev,
> u32 skb_prio, u16 vlan_prio);
> void vlan_dev_free_egress_priority(const struct net_device *dev);
> -int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
> +int vlan_dev_change_flags(struct net_device *dev, u32 flag, u32 mask);
> void vlan_dev_get_realdev_name(const struct net_device *dev, char *result,
> size_t size);
>
> diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
> index 839f2020b015..d737e259e295 100644
> --- a/net/8021q/vlan_dev.c
> +++ b/net/8021q/vlan_dev.c
> @@ -22,6 +22,7 @@
> #include <linux/skbuff.h>
> #include <linux/netdevice.h>
> #include <linux/net_tstamp.h>
> +#include <linux/notifier_info.h>
> #include <linux/etherdevice.h>
> #include <linux/ethtool.h>
> #include <linux/phy.h>
> @@ -211,8 +212,9 @@ int vlan_dev_set_egress_priority(const struct net_device *dev,
> /* Flags are defined in the vlan_flags enum in
> * include/uapi/linux/if_vlan.h file.
> */
> -int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
> +int vlan_dev_change_flags(struct net_device *dev, u32 flags, u32 mask)
> {
> + struct netdev_notifier_change_details_info info;
> struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
> u32 old_flags = vlan->flags;
>
> @@ -223,19 +225,31 @@ int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
>
> vlan->flags = (old_flags & ~mask) | (flags & mask);
>
> - if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
> + if (!netif_running(dev))
> + return 0;
> +
> + if ((vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
> if (vlan->flags & VLAN_FLAG_GVRP)
> vlan_gvrp_request_join(dev);
> else
> vlan_gvrp_request_leave(dev);
> }
>
> - if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
> + if ((vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
> if (vlan->flags & VLAN_FLAG_MVRP)
> vlan_mvrp_request_join(dev);
> else
> vlan_mvrp_request_leave(dev);
> }
> +
> + if ((vlan->flags ^ old_flags) & VLAN_FLAG_BRIDGE_BINDING &&
((vlan->flags ^ old_flags) & VLAN_FLAG_BRIDGE_BINDING)
> + netif_is_bridge_master(vlan->real_dev)) {
> + info.info.dev <http://info.info.dev> = dev;
> + info.details.vlan.bridge_binding =
> + !!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING);
> + call_netdevice_notifiers_info(NETDEV_CHANGE_DETAILS, &info.info <http://info.info>);
info.info?!
> + }
> +
> return 0;
> }
>
> diff --git a/net/bridge/br.c b/net/bridge/br.c
> index 96e91d69a9a8..62e939c6a3f0 100644
> --- a/net/bridge/br.c
> +++ b/net/bridge/br.c
> @@ -51,6 +51,11 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
> }
> }
>
> + if (is_vlan_dev(dev)) {
> + br_vlan_device_event(dev, event, ptr);
> + return NOTIFY_DONE;
> + }
> +
> /* not a port of a bridge */
> p = br_port_get_rtnl(dev);
> if (!p)
> diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
> index 06e5f6faa431..a9a08e49c76c 100644
> --- a/net/bridge/br_private.h
> +++ b/net/bridge/br_private.h
> @@ -1470,6 +1470,8 @@ void br_vlan_get_stats(const struct net_bridge_vlan *v,
> void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
> int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
> void *ptr);
> +void br_vlan_device_event(struct net_device *dev, unsigned long event,
> + void *ptr);
> void br_vlan_rtnl_init(void);
> void br_vlan_rtnl_uninit(void);
> void br_vlan_notify(const struct net_bridge *br,
> @@ -1701,6 +1703,11 @@ static inline int br_vlan_bridge_event(struct net_device *dev,
> return 0;
> }
>
> +static void br_vlan_device_event(struct net_device *dev,
> + unsigned long event, void *ptr)
> +{
> +}
> +
> static inline void br_vlan_rtnl_init(void)
> {
> }
> diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
> index 0f5e75ccac79..fe00efa46ce8 100644
> --- a/net/bridge/br_vlan.c
> +++ b/net/bridge/br_vlan.c
> @@ -1,6 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0-only
> #include <linux/kernel.h>
> #include <linux/netdevice.h>
> +#include <linux/notifier_info.h>
> #include <linux/rtnetlink.h>
> #include <linux/slab.h>
> #include <net/switchdev.h>
> @@ -1768,6 +1769,23 @@ void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
> }
> }
>
> +void br_vlan_device_event(struct net_device *dev, unsigned long event, void *ptr)
> +{
> + struct netdev_notifier_change_details_info *info;
> + struct net_device *br_dev;
> +
> + switch (event) {
> + case NETDEV_CHANGE_DETAILS:
> + info = ptr;
> + if (netif_is_bridge_master(vlan_dev_priv(dev)->real_dev)) {
no need for the indentation here, just check the opposite and break if it's not
> + br_dev = vlan_dev_priv(dev)->real_dev;
> + br_vlan_upper_change(br_dev, dev,
> + info->details.vlan.bridge_binding);
> + }
> + break;
> + }
> +}
> +
> static bool br_vlan_stats_fill(struct sk_buff *skb,
> const struct net_bridge_vlan *v)
> {
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 30a1603a7225..2eed064e9529 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -160,7 +160,7 @@ struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
> struct list_head ptype_all __read_mostly; /* Taps */
>
> static int netif_rx_internal(struct sk_buff *skb);
> -static int call_netdevice_notifiers_info(unsigned long val,
> +int call_netdevice_notifiers_info(unsigned long val,
> struct netdev_notifier_info *info);
you have to move this to its proper header file
> static int call_netdevice_notifiers_extack(unsigned long val,
> struct net_device *dev,
> @@ -1624,7 +1624,7 @@ const char *netdev_cmd_to_name(enum netdev_cmd cmd)
> N(POST_INIT) N(RELEASE) N(NOTIFY_PEERS) N(JOIN) N(CHANGEUPPER)
> N(RESEND_IGMP) N(PRECHANGEMTU) N(CHANGEINFODATA) N(BONDING_INFO)
> N(PRECHANGEUPPER) N(CHANGELOWERSTATE) N(UDP_TUNNEL_PUSH_INFO)
> - N(UDP_TUNNEL_DROP_INFO) N(CHANGE_TX_QUEUE_LEN)
> + N(UDP_TUNNEL_DROP_INFO) N(CHANGE_TX_QUEUE_LEN) N(CHANGE_DETAILS)
> N(CVLAN_FILTER_PUSH_INFO) N(CVLAN_FILTER_DROP_INFO)
> N(SVLAN_FILTER_PUSH_INFO) N(SVLAN_FILTER_DROP_INFO)
> N(PRE_CHANGEADDR) N(OFFLOAD_XSTATS_ENABLE) N(OFFLOAD_XSTATS_DISABLE)
> @@ -1927,7 +1927,7 @@ static void move_netdevice_notifiers_dev_net(struct net_device *dev,
> * are as for raw_notifier_call_chain().
> */
>
> -static int call_netdevice_notifiers_info(unsigned long val,
> +int call_netdevice_notifiers_info(unsigned long val,
> struct netdev_notifier_info *info)
> {
> struct net *net = dev_net(info->dev);
> @@ -1944,6 +1944,7 @@ static int call_netdevice_notifiers_info(unsigned long val,
> return ret;
> return raw_notifier_call_chain(&netdev_chain, val, info);
> }
> +EXPORT_SYMBOL(call_netdevice_notifiers_info);
hmm, I see that call_netdevice_notifiers() is EXPORT_SYMBOL() only (not the _GPL)
I wonder if this should instead be EXPORT_SYMBOL_GPL() as it's a new export
>
> /**
> * call_netdevice_notifiers_info_robust - call per-netns notifier blocks
>
> On Mon, Aug 22, 2022 at 7:18 PM Sevinj Aghayeva <sevinj.aghayeva@...il.com <mailto:sevinj.aghayeva@...il.com>> wrote:
>
>
>
> On Mon, Aug 22, 2022 at 4:01 AM Nikolay Aleksandrov <razor@...ckwall.org <mailto:razor@...ckwall.org>> wrote:
>
> On 20/08/2022 14:33, Sevinj Aghayeva wrote:
> > On Thu, Aug 18, 2022 at 8:00 AM Nikolay Aleksandrov <razor@...ckwall.org <mailto:razor@...ckwall.org>> wrote:
> >>
> >> On 18/08/2022 14:50, Sevinj Aghayeva wrote:
> [snip]
> >>
> >> Hi,
> >> Handling all vlan device-related changes in br_vlan_device_event() sounds good to me.
> >> Please add it to br_vlan.c.
> >
> > Hi Nik,
> >
> > Can you please review this diff before I make it into a proper patchset? Thanks!
> >
>
> Hi,
> A few comments inline below, but in general when you prepare the rfc commit please
> explain the motivation in detail why this way was chosen and a new notification type
> is needed (e.g. why not use NETDEV_CHANGEINFODATA or extend NETDEV_CHANGE).
> As I mentioned earlier it'd be nice to get feedback from others about adding this
> new notification, so they should know the "why" in detail.
>
>
> Sure, I will do that in the RFC patchset, but first I want to make sure I got the details right before making the RFC patchset. Thanks for the feedback. Please see inline.
>
>
> > diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> > index 2563d30736e9..0ce3da42325e 100644
> > --- a/include/linux/netdevice.h
> > +++ b/include/linux/netdevice.h
> > @@ -2762,6 +2762,7 @@ enum netdev_cmd {
> > NETDEV_UNREGISTER,
> > NETDEV_CHANGEMTU, /* notify after mtu change happened */
> > NETDEV_CHANGEADDR, /* notify after the address change */
> > + NETDEV_CHANGE_DETAILS,
> > NETDEV_PRE_CHANGEADDR, /* notify before the address change */
> > NETDEV_GOING_DOWN,
> > NETDEV_CHANGENAME,
> > @@ -2837,6 +2838,13 @@ struct netdev_notifier_changelowerstate_info {
> > void *lower_state_info; /* is lower dev state */
> > };
> >
> > +struct netdev_notifier_change_details_info {
> > + struct netdev_notifier_info info; /* must be first */
> > + union {
> > + bool bridge_binding;
>
> this should be in a vlan-specific structure, defined in if_vlan.h
> every other link type which wants to use the notification would define its
> own struct type
>
>
> Okay, will move it there.
>
>
>
> > + } details;
> > +};
> > +
> > struct netdev_notifier_pre_changeaddr_info {
> > struct netdev_notifier_info info; /* must be first */
> > const unsigned char *dev_addr;
> > @@ -3836,6 +3844,8 @@ int __dev_set_mtu(struct net_device *, int);
> > int dev_set_mtu(struct net_device *, int);
> > int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
> > struct netlink_ext_ack *extack);
> > +int dev_change_details_notify(struct net_device *dev, bool bridge_binding,
> > + struct netlink_ext_ack *extack);
>
> this helper is not needed
>
>
> > int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
> > struct netlink_ext_ack *extack);
> > int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,
> > diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
> > index 5eaf38875554..71947cdcfaaa 100644
> > --- a/net/8021q/vlan.h
> > +++ b/net/8021q/vlan.h
> > @@ -130,7 +130,7 @@ void vlan_dev_set_ingress_priority(const struct
> > net_device *dev,
> > int vlan_dev_set_egress_priority(const struct net_device *dev,
> > u32 skb_prio, u16 vlan_prio);
> > void vlan_dev_free_egress_priority(const struct net_device *dev);
> > -int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
> > +int vlan_dev_change_flags(struct net_device *dev, u32 flag, u32 mask);
> > void vlan_dev_get_realdev_name(const struct net_device *dev, char *result,
> > size_t size);
> >
> > diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
> > index 839f2020b015..489baa8435de 100644
> > --- a/net/8021q/vlan_dev.c
> > +++ b/net/8021q/vlan_dev.c
> > @@ -211,7 +211,7 @@ int vlan_dev_set_egress_priority(const struct
> > net_device *dev,
> > /* Flags are defined in the vlan_flags enum in
> > * include/uapi/linux/if_vlan.h file.
> > */
> > -int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
> > +int vlan_dev_change_flags(struct net_device *dev, u32 flags, u32 mask)
>
> please don't remove the const, this function shouldn't change dev's struct
>
>
> I tried not to remove const, but it seems impossible because call_netdevice_notifiers_info that we eventually call from vlan_dev_change_flags takes a non-const struct info that has a dev field being set from the const vlan_dev_change_flags.
>
>
>
> > {
> > struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
> > u32 old_flags = vlan->flags;
> > @@ -223,19 +223,29 @@ int vlan_dev_change_flags(const struct
> > net_device *dev, u32 flags, u32 mask)
> >
> > vlan->flags = (old_flags & ~mask) | (flags & mask);
> >
> > - if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
> > + if (!netif_running(dev))
> > + return 0;
> > +
> > + if ((vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
> > if (vlan->flags & VLAN_FLAG_GVRP)
> > vlan_gvrp_request_join(dev);
> > else
> > vlan_gvrp_request_leave(dev);
> > }
> >
> > - if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
> > + if ((vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
> > if (vlan->flags & VLAN_FLAG_MVRP)
> > vlan_mvrp_request_join(dev);
> > else
> > vlan_mvrp_request_leave(dev);
> > }
> > +
> > + if ((vlan->flags ^ old_flags) & VLAN_FLAG_BRIDGE_BINDING &&
> > + netif_is_bridge_master(vlan->real_dev)) {
> > + dev_change_details_notify(dev,
> > + !!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING), NULL);
>
> this helper is not needed, just fill in the details here and send the notification
>
>
> Okay, in that case I will need to export call_netdevice_notifiers_info so that I can call it from here.
>
> > + }
> > +
> > return 0;
> > }
> >
> > diff --git a/net/bridge/br.c b/net/bridge/br.c
> > index 96e91d69a9a8..62e939c6a3f0 100644
> > --- a/net/bridge/br.c
> > +++ b/net/bridge/br.c
> > @@ -51,6 +51,11 @@ static int br_device_event(struct notifier_block
> > *unused, unsigned long event, v
> > }
> > }
> >
> > + if (is_vlan_dev(dev)) {
> > + br_vlan_device_event(dev, event, ptr);
> > + return NOTIFY_DONE;
> > + }
> > +
> > /* not a port of a bridge */
> > p = br_port_get_rtnl(dev);
> > if (!p)
> > diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
> > index 06e5f6faa431..a9a08e49c76c 100644
> > --- a/net/bridge/br_private.h
> > +++ b/net/bridge/br_private.h
> > @@ -1470,6 +1470,8 @@ void br_vlan_get_stats(const struct net_bridge_vlan *v,
> > void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
> > int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
> > void *ptr);
> > +void br_vlan_device_event(struct net_device *dev, unsigned long event,
> > + void *ptr);
> > void br_vlan_rtnl_init(void);
> > void br_vlan_rtnl_uninit(void);
> > void br_vlan_notify(const struct net_bridge *br,
> > @@ -1701,6 +1703,11 @@ static inline int br_vlan_bridge_event(struct
> > net_device *dev,
> > return 0;
> > }
> >
> > +static void br_vlan_device_event(struct net_device *dev,
> > + unsigned long event, void *ptr)
> > +{
> > +}
> > +
> > static inline void br_vlan_rtnl_init(void)
> > {
> > }
> > diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
> > index 0f5e75ccac79..70a9950df175 100644
> > --- a/net/bridge/br_vlan.c
> > +++ b/net/bridge/br_vlan.c
> > @@ -1768,6 +1768,20 @@ void br_vlan_port_event(struct net_bridge_port
> > *p, unsigned long event)
> > }
> > }
> >
> > +void br_vlan_device_event(struct net_device *dev, unsigned long
> > event, void *ptr)
> > +{
> > + struct netdev_notifier_change_details_info *info;
> > + struct net_device *br_dev;
> > +
> > + switch (event) {
> > + case NETDEV_CHANGE_DETAILS:
> > + info = ptr;
> > + br_dev = vlan_dev_priv(dev)->real_dev;
>
> you're not guaranteed to have a bridge device as its real_dev, so you should
> validate that the vlan's real dev is a bridge
>
>
> Okay, will do.
>
>
>
> > + br_vlan_upper_change(br_dev, dev, info->details.bridge_binding);
> > + break;
> > + }
> > +}
> > +
> > static bool br_vlan_stats_fill(struct sk_buff *skb,
> > const struct net_bridge_vlan *v)
> > {
> > diff --git a/net/core/dev.c b/net/core/dev.c
> > index 30a1603a7225..dcdbc625585d 100644
> > --- a/net/core/dev.c
> > +++ b/net/core/dev.c
> > @@ -1624,7 +1624,7 @@ const char *netdev_cmd_to_name(enum netdev_cmd cmd)
> > N(POST_INIT) N(RELEASE) N(NOTIFY_PEERS) N(JOIN) N(CHANGEUPPER)
> > N(RESEND_IGMP) N(PRECHANGEMTU) N(CHANGEINFODATA) N(BONDING_INFO)
> > N(PRECHANGEUPPER) N(CHANGELOWERSTATE) N(UDP_TUNNEL_PUSH_INFO)
> > - N(UDP_TUNNEL_DROP_INFO) N(CHANGE_TX_QUEUE_LEN)
> > + N(UDP_TUNNEL_DROP_INFO) N(CHANGE_TX_QUEUE_LEN) N(CHANGE_DETAILS)
> > N(CVLAN_FILTER_PUSH_INFO) N(CVLAN_FILTER_DROP_INFO)
> > N(SVLAN_FILTER_PUSH_INFO) N(SVLAN_FILTER_DROP_INFO)
> > N(PRE_CHANGEADDR) N(OFFLOAD_XSTATS_ENABLE) N(OFFLOAD_XSTATS_DISABLE)
> > @@ -8767,6 +8767,27 @@ int dev_pre_changeaddr_notify(struct net_device
> > *dev, const char *addr,
> > }
> > EXPORT_SYMBOL(dev_pre_changeaddr_notify);
> >
> > +/**
> > + * dev_change_details_notify - Call NETDEV_PRE_CHANGE_DETAILS.
> > + * @dev: device
> > + * @bridge_binding: bridge binding setting
> > + * @extack: netlink extended ack
> > + */
> > +int dev_change_details_notify(struct net_device *dev, bool bridge_binding,
> > + struct netlink_ext_ack *extack)
> > +{
> > + struct netdev_notifier_change_details_info info = {
> > + .info.dev <http://info.dev> = dev,
> > + .info.extack = extack,
> > + .details.bridge_binding = bridge_binding,
> > + };
> > + int rc;
> > +
> > + rc = call_netdevice_notifiers_info(NETDEV_CHANGE_DETAILS, &info.info <http://info.info>);
> > + return notifier_to_errno(rc);
> > +}
> > +EXPORT_SYMBOL(dev_change_details_notify);
> > +
>
> this helper is unnecessary, just fill in the struct at the caller site and
> send the notification directly
>
>
> Okay, will remove it.
>
> Thanks for the review! I will send the updated patch soon.
>
>
> > /**
> > * dev_set_mac_address - Change Media Access Control Address
> > * @dev: device
> >
> >
> >>
> >> Thanks,
> >> Nik
> >>
> >>
>
> Cheers,
> Nik
>
>
>
>
> --
>
> Sevinj.Aghayeva
>
>
>
> --
>
> Sevinj.Aghayeva
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