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bpf: offload: ignore namespace moves 

We are currently destroying the device offload state when device
moves to another net namespace.  This doesn't break with current
NFP code, because offload state is not used on program removal,
but it's not correct behaviour.

Ignore the device unregister notifications on namespace move.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2017-11-20 15:21:57 -08:00 committed by Daniel Borkmann
parent 479321e9c3
commit 62c71b45e8
1 changed files with 4 additions and 0 deletions
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4
kernel/bpf/offload.c
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@ -174,6 +174,10 @@ static int bpf_offload_notification(struct notifier_block *notifier,
switch (event) {
case NETDEV_UNREGISTER:
/* ignore namespace changes */
if (netdev->reg_state != NETREG_UNREGISTERING)
break;
list_for_each_entry_safe(offload, tmp, &bpf_prog_offload_devs,
offloads) {
if (offload->netdev == netdev)