From: Hangbin Liu <liuhangbin@gmail•com>
To: Yuyang Huang <yuyanghuang@google•com>
Cc: "David S. Miller" <davem@davemloft•net>,
"Eric Dumazet" <edumazet@google•com>,
"Jakub Kicinski" <kuba@kernel•org>,
"Paolo Abeni" <pabeni@redhat•com>,
"Simon Horman" <horms@kernel•org>,
"David Ahern" <dsahern@kernel•org>,
roopa@cumulusnetworks•com, jiri@resnulli•us,
stephen@networkplumber•org, jimictw@google•com, prohr@google•com,
nicolas.dichtel@6wind•com, andrew@lunn•ch,
netdev@vger•kernel.org, "Maciej Żenczykowski" <maze@google•com>,
"Lorenzo Colitti" <lorenzo@google•com>,
"Patrick Ruddy" <pruddy@vyatta•att-mail.com>
Subject: Re: [PATCH net-next, v5] netlink: add IGMP/MLD join/leave notifications
Date: Tue, 10 Dec 2024 01:20:55 +0000 [thread overview]
Message-ID: <Z1eXd2HROVbFM6mt@fedora> (raw)
In-Reply-To: <20241206041025.37231-1-yuyanghuang@google.com>
On Fri, Dec 06, 2024 at 01:10:25PM +0900, Yuyang Huang wrote:
> This change introduces netlink notifications for multicast address
> changes. The following features are included:
> * Addition and deletion of multicast addresses are reported using
> RTM_NEWMULTICAST and RTM_DELMULTICAST messages with AF_INET and
> AF_INET6.
> * Two new notification groups: RTNLGRP_IPV4_MCADDR and
> RTNLGRP_IPV6_MCADDR are introduced for receiving these events.
>
> This change allows user space applications (e.g., ip monitor) to
> efficiently track multicast group memberships by listening for netlink
> events. Previously, applications relied on inefficient polling of
> procfs, introducing delays. With netlink notifications, applications
> receive realtime updates on multicast group membership changes,
> enabling more precise metrics collection and system monitoring.
>
> This change also unlocks the potential for implementing a wide range
> of sophisticated multicast related features in user space by allowing
> applications to combine kernel provided multicast address information
> with user space data and communicate decisions back to the kernel for
> more fine grained control. This mechanism can be used for various
> purposes, including multicast filtering, IGMP/MLD offload, and
> IGMP/MLD snooping.
>
> Cc: Maciej Żenczykowski <maze@google•com>
> Cc: Lorenzo Colitti <lorenzo@google•com>
> Co-developed-by: Patrick Ruddy <pruddy@vyatta•att-mail.com>
> Signed-off-by: Patrick Ruddy <pruddy@vyatta•att-mail.com>
> Link: https://lore.kernel.org/r/20180906091056.21109-1-pruddy@vyatta.att-mail.com
> Signed-off-by: Yuyang Huang <yuyanghuang@google•com>
> ---
Reviewed-by: Hangbin Liu <liuhangbin@gmail•com>
next prev parent reply other threads:[~2024-12-10 1:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-06 4:10 [PATCH net-next, v5] netlink: add IGMP/MLD join/leave notifications Yuyang Huang
2024-12-06 14:56 ` Nicolas Dichtel
2024-12-10 1:20 ` Hangbin Liu [this message]
2024-12-10 2:25 ` Jakub Kicinski
2024-12-10 3:19 ` Yuyang Huang
2024-12-10 4:32 ` Yuyang Huang
2024-12-11 0:50 ` Jakub Kicinski
2024-12-11 1:43 ` Yuyang Huang
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