On 1/16/25 01:06, Jakub Kicinski wrote:
On Wed, 8 Jan 2025 14:06:35 -0800 David Wei wrote:
From: Pavel Begunkov <asml.silence@xxxxxxxxx>
Zerocopy receive needs a net device to bind to its rx queue and dma map
buffers. As a preparation to following patches, resolve a net device
from the if_idx parameter with no functional changes otherwise.
How do you know if someone unregisters this netdevice?
The unregister process waits for all the refs to be released,
for *ekhm* historic reasons. Normally ref holders subscribe
to netdev events and kill their dependent objects. Perhaps
it is somewhere else/later in the series...
Ok, I can pin the struct device long term instead and kill
netdev in the uninstall callback off
unregister_netdevice_many_notify(), if that works with you.
+#include <linux/rtnetlink.h>
Do you need anything more than rtnl_lock from this header?
No, I don't believe so
--
Pavel Begunkov
