From: Andrew Lunn <andrew@lunn.ch>
To: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Maximilian Wilhelm <max@rfc2324.org>, netdev@vger.kernel.org
Subject: Re: [RFC] Stable interface index option
Date: Wed, 2 Dec 2015 02:41:18 +0100 [thread overview]
Message-ID: <20151202014118.GD29814@lunn.ch> (raw)
In-Reply-To: <1449014338.3866712.455236865.50F81F7F@webmail.messagingengine.com>
> In general the ifindexes are designed to not be reused very fast.
Some parts of multicast group management rely on this. You need to
remove group memberships from a socket when an interface has
disappeared, e.g. a VPN interface has gone away. You can pass the
ifindex of the no longer existing interface when removing the group
memberships. If that ifindex has been re-used, you are going to have
interesting race conditions.
Andrew
next prev parent reply other threads:[~2015-12-02 1:41 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-01 12:04 [RFC] Stable interface index option Maximilian Wilhelm
2015-12-01 15:34 ` Sowmini Varadhan
2015-12-01 15:50 ` Maximilian Wilhelm
2015-12-01 16:02 ` Hannes Frederic Sowa
2015-12-01 16:06 ` Stephen Hemminger
2015-12-01 19:28 ` David Miller
2015-12-01 20:20 ` Stephen Hemminger
2015-12-01 20:57 ` David Miller
2015-12-01 21:06 ` Sowmini Varadhan
2015-12-01 21:14 ` Hannes Frederic Sowa
2015-12-01 21:44 ` Stephen Hemminger
2015-12-01 21:54 ` Hannes Frederic Sowa
2015-12-01 22:31 ` Stephen Hemminger
2015-12-01 19:27 ` David Miller
2015-12-01 20:26 ` Hannes Frederic Sowa
2015-12-01 22:43 ` Maximilian Wilhelm
2015-12-01 23:58 ` Hannes Frederic Sowa
2015-12-02 1:41 ` Andrew Lunn [this message]
2015-12-02 11:03 ` Marcelo Ricardo Leitner
2015-12-01 16:11 ` Sowmini Varadhan
-- strict thread matches above, loose matches on Subject: below --
2015-12-01 16:10 Maximilian Wilhelm
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