netdev - Re: [PATCH net-next 5/9] net: ethtool: copy req

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20250623073721.1315dd03@kernel.org>
Date: Mon, 23 Jun 2025 07:37:21 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org,
 donald.hunter@...il.com, sdf@...ichev.me, jdamato@...tly.com,
 ecree.xilinx@...il.com
Subject: Re: [PATCH net-next 5/9] net: ethtool: copy req_info from SET to
 NTF

On Sun, 22 Jun 2025 14:00:20 +0200 Maxime Chevallier wrote:
> > @@ -979,6 +979,9 @@ static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
> >  
> >  	req_info->dev = dev;
> >  	req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
> > +	if (orig_req_info)
> > +		memcpy(&req_info[1], &orig_req_info[1],
> > +		       ops->req_info_size - sizeof(*req_info));  
> 
> Is there any chance we can also carry orig_req_info->phy_index into
> req_info ? That's a bit of sub-command context that is also useful for
> notifications, especially PLCA. As of today, the PLCA notif after a SET
> isn't generated at all as the phy_index isn't passed to the ethnl
> notification code.

Definitely a good idea, only question is whether it should be a
separate series. But the change is easy, I guess just:

diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 1a8589693d91..91974d8e74d8 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -981,9 +981,11 @@ static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 
        req_info->dev = dev;
        req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
-       if (orig_req_info)
+       if (orig_req_info) {
+               req_info->phy_index = orig_req_info->phy_index;
                memcpy(&req_info[1], &orig_req_info[1],
                       ops->req_info_size - sizeof(*req_info));
+       }
 
        netdev_ops_assert_locked(dev);
 
If you'd like me to squash it in -- would you be able to test this?