net/sched: act_api: Notify user space if any actions were flushed before error
authorVictor Nogueira <victor@mojatatu.com>
Thu, 23 Jun 2022 14:07:41 +0000 (11:07 -0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 7 Jul 2022 15:53:27 +0000 (17:53 +0200)
commited303cc7aab93e4a07e1e8eb556a647173a70955
treeb346bfedc5b260875293fb0baccc6a4c1ddf236d
parent1d776f085006a4440c21af2a9a66202a6d577b03
net/sched: act_api: Notify user space if any actions were flushed before error

commit 76b39b94382f9e0a639e1c70c3253de248cc4c83 upstream.

If during an action flush operation one of the actions is still being
referenced, the flush operation is aborted and the kernel returns to
user space with an error. However, if the kernel was able to flush, for
example, 3 actions and failed on the fourth, the kernel will not notify
user space that it deleted 3 actions before failing.

This patch fixes that behaviour by notifying user space of how many
actions were deleted before flush failed and by setting extack with a
message describing what happened.

Fixes: 55334a5db5cd ("net_sched: act: refuse to remove bound action outside")
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/sched/act_api.c