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From: Hangbin Liu <liuhangbin@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Ido Schimmel <idosch@idosch.org>,
	David Ahern <dsahern@kernel.org>,
	netdev@vger.kernel.org, "David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Thomas Haller <thaller@redhat.com>
Subject: Re: [PATCH net-next] ipv4/fib: send RTM_DELROUTE notify when flush fib
Date: Tue, 25 Jul 2023 16:20:59 +0800	[thread overview]
Message-ID: <ZL+F6zUIXfyhevmm@Laptop-X1> (raw)
In-Reply-To: <20230724084820.4aa133cc@hermes.local>

On Mon, Jul 24, 2023 at 08:48:20AM -0700, Stephen Hemminger wrote:
> On Mon, 24 Jul 2023 16:56:37 +0800
> Hangbin Liu <liuhangbin@gmail.com> wrote:
> 
> > The NetworkManager keeps a cache of the routes. Missing/Wrong events mean that
> > the cache becomes inconsistent. The IPv4 will not send src route delete info
> > if it's bond to other device. While IPv6 only modify the src route instead of
> > delete it, and also no notify. So NetworkManager developers complained and
> > hope to have a consistent and clear notification about route modify/delete.
> 
> Read FRR they get it right. The routing daemons have to track kernel,
> and the semantics have been worked out for years.

Yes, normally the routing daemon need to track kernel. On the other hand,
the kernel also need to make a clear feedback. The userspace developers may
not know the kernel code very well. The unclear/inconsistent notification
would make them confused.

Thanks
Hangbin

  reply	other threads:[~2023-07-25  8:21 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-18  8:00 [PATCH net-next] ipv4/fib: send RTM_DELROUTE notify when flush fib Hangbin Liu
2023-07-18 10:19 ` Ido Schimmel
2023-07-18 10:32   ` Ido Schimmel
2023-07-18 14:45     ` David Ahern
2023-07-18 15:58   ` Stephen Hemminger
2023-07-20  7:51     ` Hangbin Liu
2023-07-20 14:29       ` Ido Schimmel
2023-07-21  1:34         ` Hangbin Liu
2023-07-21  4:01           ` David Ahern
2023-07-21  5:46             ` Hangbin Liu
2023-07-23  7:38               ` Ido Schimmel
2023-07-24  8:56                 ` Hangbin Liu
2023-07-24 15:48                   ` Stephen Hemminger
2023-07-25  8:20                     ` Hangbin Liu [this message]
2023-07-25 16:36                       ` Stephen Hemminger
2023-07-28 13:01                         ` Nicolas Dichtel
2023-07-28 15:42                           ` David Ahern
2023-08-02  9:10                             ` Thomas Haller
2023-08-08  1:44                               ` David Ahern
2023-08-08 18:59                                 ` Benjamin Poirier
2023-09-11  9:50                                   ` Thomas Haller
2023-09-13  7:58                                     ` Nicolas Dichtel
2023-09-13  9:54                                       ` Hangbin Liu
2023-09-13 14:11                                         ` Nicolas Dichtel
2023-09-13 14:43                                           ` David Ahern
2023-09-13 14:53                                             ` Nicolas Dichtel
2023-09-14 15:43                                               ` Nicolas Dichtel
2023-09-15  3:07                                                 ` David Ahern
2023-09-15 15:54                                                   ` Nicolas Dichtel
2023-09-13 14:41                                       ` David Ahern
2023-09-15 16:59                                         ` Stephen Hemminger
2023-07-26 10:17                     ` [Questions] Some issues about IPv4/IPv6 nexthop route (was Re: [PATCH net-next] ipv4/fib: send RTM_DELROUTE notify when flush fib) Hangbin Liu
2023-07-26 15:57                       ` David Ahern
2023-07-27  4:19                         ` [Questions] Some issues about IPv4/IPv6 nexthop route Hangbin Liu
2023-07-27 15:35                           ` David Ahern
2023-07-27 14:45                       ` [Questions] Some issues about IPv4/IPv6 nexthop route (was Re: [PATCH net-next] ipv4/fib: send RTM_DELROUTE notify when flush fib) Ido Schimmel
2023-08-28  7:53                         ` [Questions] Some issues about IPv4/IPv6 nexthop route Hangbin Liu
2023-08-28 15:06                           ` David Ahern
2023-08-29  1:07                             ` Hangbin Liu
2023-08-29  1:42                               ` David Ahern
2023-08-02  9:06                 ` [PATCH net-next] ipv4/fib: send RTM_DELROUTE notify when flush fib Thomas Haller
2023-08-04  8:09                 ` Hangbin Liu
2023-08-09  7:06                   ` Ido Schimmel
2023-08-09 10:02                     ` Hangbin Liu
2023-07-25 14:13 ` kernel test robot

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