From: Jiri Pirko <jiri@resnulli.us>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: netdev@vger.kernel.org, davem@davemloft.net,
jakub.kicinski@netronome.com, sthemmin@microsoft.com,
dsahern@gmail.com, dcbw@redhat.com, mkubecek@suse.cz,
andrew@lunn.ch, parav@mellanox.com, saeedm@mellanox.com,
mlxsw@mellanox.com
Subject: Re: [patch net-next rfc 2/7] net: introduce name_node struct to be used in hashlist
Date: Fri, 13 Sep 2019 11:52:06 +0200 [thread overview]
Message-ID: <20190913095012.GA2422@nanopsycho> (raw)
In-Reply-To: <20190719132649.700e6a5c@hermes.lan>
Fri, Jul 19, 2019 at 10:26:49PM CEST, stephen@networkplumber.org wrote:
>On Fri, 19 Jul 2019 21:17:40 +0200
>Jiri Pirko <jiri@resnulli.us> wrote:
>
>> Fri, Jul 19, 2019 at 06:29:36PM CEST, stephen@networkplumber.org wrote:
>> >On Fri, 19 Jul 2019 13:00:24 +0200
>> >Jiri Pirko <jiri@resnulli.us> wrote:
>> >
>> >> From: Jiri Pirko <jiri@mellanox.com>
>> >>
>> >> Signed-off-by: Jiri Pirko <jiri@mellanox.com>
>> >> ---
>> >> include/linux/netdevice.h | 10 +++-
>> >> net/core/dev.c | 96 +++++++++++++++++++++++++++++++--------
>> >> 2 files changed, 86 insertions(+), 20 deletions(-)
>> >>
>> >> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
>> >> index 88292953aa6f..74f99f127b0e 100644
>> >> --- a/include/linux/netdevice.h
>> >> +++ b/include/linux/netdevice.h
>> >> @@ -918,6 +918,12 @@ struct dev_ifalias {
>> >> struct devlink;
>> >> struct tlsdev_ops;
>> >>
>> >> +struct netdev_name_node {
>> >> + struct hlist_node hlist;
>> >> + struct net_device *dev;
>> >> + char *name
>> >
>> >You probably can make this const char *
>
>Don't bother, it looks ok as is. the problem is you would have
>to cast it when calling free.
Actually, it does not. So I'll make it const.
>
>> >Do you want to add __rcu to this list?
>>
>> Which list?
>>
>
> struct netdev_name_node __rcu *name_node;
This is stored in struct net_device for ifname. The pointer is never
accessed from rcu read.
>
>You might also want to explictly init the hlist node rather
>than relying on the fact that zero is an empty node ptr.
>
>
> static struct netdev_name_node *netdev_name_node_alloc(struct net_device *dev,
>- char *name)
>+ const char *name)
> {
> struct netdev_name_node *name_node;
>
>- name_node = kzalloc(sizeof(*name_node), GFP_KERNEL);
>+ name_node = kmalloc(sizeof(*name_node));
> if (!name_node)
> return NULL;
>+
>+ INIT_HLIST_NODE(&name_node->hlist);
Will do. Thanks!
> name_node->dev = dev;
> name_node->name = name;
> return name_node;
>
next prev parent reply other threads:[~2019-09-13 9:52 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 11:00 [patch net-next rfc 0/7] net: introduce alternative names for network interfaces Jiri Pirko
2019-07-19 11:00 ` [patch net-next rfc 1/7] net: procfs: use index hashlist instead of name hashlist Jiri Pirko
2019-07-19 11:00 ` [patch net-next rfc 2/7] net: introduce name_node struct to be used in hashlist Jiri Pirko
2019-07-19 16:29 ` Stephen Hemminger
2019-07-19 19:17 ` Jiri Pirko
2019-07-19 20:26 ` Stephen Hemminger
2019-07-20 7:15 ` Jiri Pirko
2019-09-13 9:52 ` Jiri Pirko [this message]
2019-08-08 4:34 ` kbuild test robot
2019-07-19 11:00 ` [patch net-next rfc 3/7] net: rtnetlink: add commands to add and delete alternative ifnames Jiri Pirko
2019-07-20 3:58 ` Jakub Kicinski
2019-07-20 7:20 ` Jiri Pirko
2019-08-09 4:11 ` Roopa Prabhu
2019-08-09 6:25 ` Jiri Pirko
2019-08-09 15:40 ` Roopa Prabhu
2019-08-09 15:46 ` Michal Kubecek
2019-08-10 13:46 ` Roopa Prabhu
2019-08-10 15:50 ` Michal Kubecek
2019-08-10 19:39 ` Roopa Prabhu
2019-08-11 22:10 ` Michal Kubecek
2019-08-12 15:21 ` Roopa Prabhu
2019-08-12 15:43 ` Michal Kubecek
2019-08-09 16:14 ` David Ahern
2019-08-10 6:30 ` Jiri Pirko
2019-08-12 1:34 ` David Ahern
2019-08-12 1:37 ` David Ahern
2019-08-12 8:31 ` Jiri Pirko
2019-08-12 15:13 ` Roopa Prabhu
2019-08-12 21:43 ` Jakub Kicinski
2019-08-13 0:29 ` David Ahern
2019-08-13 6:53 ` Jiri Pirko
2019-08-13 6:51 ` Jiri Pirko
2019-08-12 15:40 ` Stephen Hemminger
2019-08-12 16:23 ` Roopa Prabhu
2019-08-13 6:55 ` Jiri Pirko
2019-08-12 16:01 ` David Ahern
2019-08-13 6:56 ` Jiri Pirko
2019-08-26 16:09 ` Jiri Pirko
2019-08-26 16:55 ` Jakub Kicinski
2019-08-26 21:46 ` David Ahern
2019-08-26 22:15 ` Jakub Kicinski
2019-08-26 22:18 ` David Miller
2019-08-26 22:24 ` David Ahern
2019-08-26 22:25 ` David Miller
2019-08-27 0:17 ` David Ahern
2019-08-27 5:09 ` Michal Kubecek
2019-08-27 7:08 ` Jiri Pirko
2019-08-27 8:22 ` David Miller
2019-08-27 9:35 ` Jiri Pirko
2019-08-27 15:14 ` Roopa Prabhu
2019-08-28 7:07 ` Jiri Pirko
2019-08-29 4:36 ` Roopa Prabhu
2019-08-29 5:26 ` Michal Kubecek
2019-08-30 14:35 ` Roopa Prabhu
2019-08-30 14:47 ` David Ahern
2019-08-30 17:04 ` Jiri Pirko
2019-08-30 14:49 ` Michal Kubecek
2019-08-30 17:03 ` Jiri Pirko
2019-09-12 11:59 ` Jiri Pirko
2019-09-13 8:21 ` Jiri Pirko
2019-09-13 14:50 ` Jiri Pirko
2019-08-27 4:55 ` Michal Kubecek
2019-08-27 13:43 ` David Ahern
2019-08-10 6:32 ` Jiri Pirko
2019-07-19 11:00 ` [patch net-next rfc 4/7] net: rtnetlink: put alternative names to getlink message Jiri Pirko
2019-07-20 3:59 ` Jakub Kicinski
2019-07-20 7:17 ` Jiri Pirko
2019-07-19 11:00 ` [patch net-next rfc 5/7] net: rtnetlink: unify the code in __rtnl_newlink get dev with the rest Jiri Pirko
2019-07-19 11:00 ` [patch net-next rfc 6/7] net: rtnetlink: introduce helper to get net_device instance by ifname Jiri Pirko
2019-07-19 11:00 ` [patch net-next rfc 7/7] net: rtnetlink: add possibility to use alternative names as message handle Jiri Pirko
2019-07-20 3:59 ` Jakub Kicinski
2019-07-20 7:22 ` Jiri Pirko
2019-07-19 11:03 ` [patch iproute2 rfc 1/2] ip: add support for alternative name addition/deletion/list Jiri Pirko
2019-07-19 11:03 ` [patch iproute2 rfc 2/2] ip: allow to use alternative names as handle Jiri Pirko
2019-07-19 16:31 ` [patch net-next rfc 0/7] net: introduce alternative names for network interfaces Stephen Hemminger
2019-07-19 19:16 ` Jiri Pirko
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