netdev - Re: [patch net-next v2 01/10] net: rename netdev_phys_port

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 10 Nov 2014 13:33:20 +0100
From:	Daniel Borkmann <dborkman@...hat.com>
To:	Jamal Hadi Salim <jhs@...atatu.com>
CC:	David Miller <davem@...emloft.net>, jiri@...nulli.us,
	netdev@...r.kernel.org, nhorman@...driver.com, andy@...yhouse.net,
	tgraf@...g.ch, ogerlitz@...lanox.com, jesse@...ira.com,
	pshelar@...ira.com, azhou@...ira.com, ben@...adent.org.uk,
	stephen@...workplumber.org, jeffrey.t.kirsher@...el.com,
	vyasevic@...hat.com, xiyou.wangcong@...il.com,
	john.r.fastabend@...el.com, edumazet@...gle.com, sfeldma@...il.com,
	f.fainelli@...il.com, roopa@...ulusnetworks.com,
	linville@...driver.com, jasowang@...hat.com, ebiederm@...ssion.com,
	nicolas.dichtel@...nd.com, ryazanov.s.a@...il.com,
	buytenh@...tstofly.org, aviadr@...lanox.com, nbd@...nwrt.org,
	alexei.starovoitov@...il.com, Neil.Jerram@...aswitch.com,
	ronye@...lanox.com, simon.horman@...ronome.com,
	alexander.h.duyck@...hat.com, john.ronciak@...el.com,
	mleitner@...hat.com, shrijeet@...il.com, gospo@...ulusnetworks.com,
	bcrl@...ck.org
Subject: Re: [patch net-next v2 01/10] net: rename netdev_phys_port_id to
 more generic name

On 11/10/2014 01:06 PM, Jamal Hadi Salim wrote:
> On 11/10/14 00:23, David Miller wrote:
>> From: Jamal Hadi Salim <jhs@...atatu.com>
>> Date: Sun, 09 Nov 2014 22:35:12 -0500
>>
>>> wouldnt this just break an existing ABI? You may need to introduce a
>>> new attribute.
>>
>> He isn't breaking anything Jamal, he's just changing the internal
>> macro name we use for the attribute's maximum length.
>
> It is a _user space visible rename_, how about:
>
> #define MAX_PHYS_ITEM_ID_LEN 32
> #define MAX_PHYS_PORT_ID_LEN   MAX_PHYS_ITEM_ID_LEN
>
> I did miss the fact that the size didnt change.

Actually, it's currently not exposed via any uapi header ...

$ git grep -n MAX_PHYS_PORT_ID_LEN
include/linux/netdevice.h:756:#define MAX_PHYS_PORT_ID_LEN 32
include/linux/netdevice.h:762:  unsigned char id[MAX_PHYS_PORT_ID_LEN];
net/core/rtnetlink.c:871:              + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
net/core/rtnetlink.c:1199:      [IFLA_PHYS_PORT_ID]     = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },

... and based on commit 66cae9ed6bc4 ("rtnl: export physical port id
via RT netlink") only exported as read-only.

Best,
Daniel
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html