netdev - [PATCH net-next v1 2/2] net/core: refactor promiscuous mode message

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Date:   Tue, 14 Feb 2023 13:01:17 -0800
From:   Jesse Brandeburg <jesse.brandeburg@...el.com>
To:     kuba@...nel.org, davem@...emloft.net, pabeni@...hat.com
Cc:     netdev@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
        edumazet@...gle.com, Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: [PATCH net-next v1 2/2] net/core: refactor promiscuous mode message

The kernel stack can be more consistent by printing the IFF_PROMISC
aka promiscuous enable/disable messages with the standard netdev_info
message which can include bus and driver info as well as the device.

typical command usage from user space looks like:
ip link set eth0 promisc <on|off>

But lots of utilities such as bridge, tcpdump, etc put the interface into
promiscuous mode.

old message:
[  406.034418] device eth0 entered promiscuous mode
[  408.424703] device eth0 left promiscuous mode

new message:
[  406.034431] ice 0000:17:00.0 eth0: entered promiscuous mode
[  408.424715] ice 0000:17:00.0 eth0: left promiscuous mode

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
---
I'm unsure about this one because it's changing a long standard kernel
message to a slightly different format. I think the new way looks better
and has more information.
---
 net/core/dev.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index ad1e6482e1c1..357081b0113c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8321,9 +8321,8 @@ static int __dev_set_promiscuity(struct net_device *dev, int inc, bool notify)
 		}
 	}
 	if (dev->flags != old_flags) {
-		pr_info("device %s %s promiscuous mode\n",
-			dev->name,
-			dev->flags & IFF_PROMISC ? "entered" : "left");
+		netdev_info(dev, "%s promiscuous mode\n",
+			    dev->flags & IFF_PROMISC ? "entered" : "left");
 		if (audit_enabled) {
 			current_uid_gid(&uid, &gid);
 			audit_log(audit_context(), GFP_ATOMIC,
-- 
2.31.1