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Date: Mon, 31 Oct 2022 18:43:11 +0100 From: Guillaume Nault <gnault@...hat.com> To: Hangbin Liu <liuhangbin@...il.com> Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>, Florent Fourcot <florent.fourcot@...irst.fr>, Nikolay Aleksandrov <razor@...ckwall.org>, Nicolas Dichtel <nicolas.dichtel@...nd.com>, David Ahern <dsahern@...nel.org> Subject: Re: [PATCHv7 net-next 0/4] rtnetlink: Honour NLM_F_ECHO flag in rtnl_{new, del}link On Fri, Oct 28, 2022 at 04:42:20AM -0400, Hangbin Liu wrote: > Netlink messages are used for communicating between user and kernel space. > When user space configures the kernel with netlink messages, it can set the > NLM_F_ECHO flag to request the kernel to send the applied configuration back > to the caller. This allows user space to retrieve configuration information > that are filled by the kernel (either because these parameters can only be > set by the kernel or because user space let the kernel choose a default > value). > > The kernel has support this feature in some places like RTM_{NEW, DEL}ADDR, > RTM_{NEW, DEL}ROUTE. This patch set handles NLM_F_ECHO flag and send link > info back after rtnl_{new, del}link. Reviewed-by: Guillaume Nault <gnault@...hat.com> Thanks Hangbin!
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