From: Nicolas Dichtel <nicolas.dichtel@6wind•com>
To: Thomas Graf <tgraf@suug•ch>
Cc: David Miller <davem@davemloft•net>,
David.Laight@ACULAB•COM, netdev@vger•kernel.org
Subject: Re: [PATCH net-next 0/7] Allow to monitor multicast cache event via rtnetlink
Date: Wed, 12 Dec 2012 18:30:51 +0100 [thread overview]
Message-ID: <50C8BF4B.6030801@6wind.com> (raw)
In-Reply-To: <20121211184013.GD27746@casper.infradead.org>
Le 11/12/2012 19:40, Thomas Graf a écrit :
> On 12/11/12 at 04:03pm, Nicolas Dichtel wrote:
>> In fact, it seems not so easy because most users of nlmsg_new() calculate
>> the exact needed length, thus if we add an unpredicted attribute,
>> the message will be too small.
>
> True, we would either need to fix the calculations by accounting
> for an additional 4 bytes for each 64bit arg or just reserve an
> additional fixed amount for padding per message in nlmsg_new().
>
I would say that reserving additional space is better, because we also
need to align attributes that contain u64 fields:
struct attribute_foo {
__u32 bar;
__u32 bar2;
__u64 foo;
};
I wonder if it is better to align all attribute on 64-bits or only u64 and
add a new function nla_put_align64() for attribute with u64 fields.
next prev parent reply other threads:[~2012-12-12 17:30 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-04 11:13 [PATCH net-next 0/7] Allow to monitor multicast cache event via rtnetlink Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 1/7] netconf: advertise mc_forwarding status Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 2/7] ip6mr: use nla_nest_* helpers Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 3/7] ipmr/ip6mr: advertise mfc stats via rtnetlink Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 4/7] ipmr/ip6mr: report origin of mfc entry into rtnl msg Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 5/7] ipmr/ip6mr: allow to get unresolved cache via netlink Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 6/7] ipmr: advertise new mfc entries via rtnl Nicolas Dichtel
2012-12-04 11:13 ` [PATCH net-next 7/7] ip6mr: " Nicolas Dichtel
2012-12-04 18:09 ` [PATCH net-next 0/7] Allow to monitor multicast cache event via rtnetlink David Miller
2012-12-04 20:02 ` Nicolas Dichtel
2012-12-05 11:02 ` Nicolas Dichtel
2012-12-05 11:41 ` David Laight
2012-12-05 17:54 ` David Miller
2012-12-06 8:43 ` Nicolas Dichtel
2012-12-06 17:49 ` Thomas Graf
2012-12-06 21:49 ` Nicolas Dichtel
2012-12-07 10:38 ` David Laight
2012-12-07 10:58 ` Thomas Graf
2012-12-11 15:03 ` Nicolas Dichtel
2012-12-11 18:40 ` Thomas Graf
2012-12-12 17:30 ` Nicolas Dichtel [this message]
2012-12-14 13:16 ` [PATCH] netlink: align attributes on 64-bits Nicolas Dichtel
2012-12-14 15:49 ` Ben Hutchings
2012-12-14 16:04 ` Nicolas Dichtel
2012-12-17 16:49 ` [PATCH v2] " Nicolas Dichtel
2012-12-17 17:06 ` David Laight
2012-12-17 17:35 ` Nicolas Dichtel
2012-12-18 9:19 ` David Laight
2012-12-18 10:18 ` Nicolas Dichtel
2012-12-18 12:57 ` Thomas Graf
2012-12-18 16:23 ` Nicolas Dichtel
2012-12-18 16:50 ` David Laight
2012-12-18 17:11 ` Thomas Graf
2012-12-19 9:17 ` David Laight
2012-12-19 17:20 ` Thomas Graf
2012-12-20 9:37 ` David Laight
2012-12-20 9:40 ` David Laight
2012-12-18 17:08 ` Thomas Graf
2012-12-18 22:07 ` Nicolas Dichtel
2012-12-19 11:22 ` Nicolas Dichtel
2012-12-19 17:09 ` Thomas Graf
2012-12-19 18:07 ` Nicolas Dichtel
2012-12-17 9:59 ` [PATCH] " David Laight
2012-12-17 16:53 ` Nicolas Dichtel
2012-12-05 17:53 ` [PATCH net-next 0/7] Allow to monitor multicast cache event via rtnetlink David Miller
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