From: jamal <hadi@cyberus.ca>
To: Patrick McHardy <kaber@trash.net>
Cc: David Miller <davem@davemloft.net>,
shemminger@vyatta.com, netdev@vger.kernel.org
Subject: Re: [PATCH net-2.6.26] netlink: make socket filters work on netlink
Date: Tue, 01 Apr 2008 10:04:06 -0400 [thread overview]
Message-ID: <1207058646.4424.218.camel@localhost> (raw)
In-Reply-To: <47F22211.5080100@trash.net>
On Tue, 2008-01-04 at 13:52 +0200, Patrick McHardy wrote:
> Isn't that what nlmsg_pid already contains?
would work only on the case of user<->user.
On kernel->user it is supposed to be owned by the kernel and set to 0.
OTOH, one could use the nlmsg seq as a "cookie" (since that is untouched
by the kernel) with the hope that no other process will use that same
cookie - then you can filter events based on the cookie. Note this is
only useful if you can guarantee that all processes running on a system
guarantee such uniqueness of such cookies amongst each other; which is
typically a bad assumption for a generic solution but would work.
cheers,
jamal
next prev parent reply other threads:[~2008-04-01 14:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-21 18:05 [PATCH net-2.6.26] netlink: make socket filters work on netlink Stephen Hemminger
2008-03-21 22:47 ` David Miller
2008-03-26 20:19 ` Patrick McHardy
2008-03-31 19:33 ` Stephen Hemminger
2008-03-31 19:40 ` Patrick McHardy
2008-03-31 19:46 ` Stephen Hemminger
2008-03-31 20:07 ` David Miller
2008-03-31 20:15 ` Patrick McHardy
2008-03-31 21:49 ` jamal
2008-04-01 11:52 ` Patrick McHardy
2008-04-01 14:04 ` jamal [this message]
2008-04-02 10:00 ` Patrick McHardy
2008-04-02 11:21 ` Thomas Graf
2008-04-02 12:01 ` jamal
2008-04-02 12:09 ` Patrick McHardy
2008-04-02 12:25 ` jamal
2008-04-02 12:45 ` Patrick McHardy
2008-04-02 13:10 ` jamal
2008-04-02 14:28 ` Thomas Graf
2008-04-02 18:12 ` jamal
2008-04-02 12:03 ` Patrick McHardy
2008-04-02 14:09 ` Thomas Graf
2008-04-02 11:42 ` jamal
2008-04-02 12:07 ` Patrick McHardy
2008-04-02 14:05 ` Thomas Graf
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