Merge branch 'sched-action-events'

Merge branch 'sched-action-events'

Roman Mashak says:

====================
Fix event generation for actions batch Add/Delete mode

When adding or deleting a batch of entries, the kernel sends upto
TCA_ACT_MAX_PRIO entries in an event to user space. However it does not
consider that the action sizes may vary and require different skb sizes.

For example :

% cat tc-batch.sh
TC="sudo /mnt/iproute2.git/tc/tc"

$TC actions flush action gact
for i in `seq 1 $1`;
do
   cmd="action pass index $i "
   args=$args$cmd
done
$TC actions add $args
%
% ./tc-batch.sh 32
Error: Failed to fill netlink attributes while adding TC action.
We have an error talking to the kernel
%

This patchset introduces new callback in tc_action_ops, which calculates
the action size, and passes size to tcf_add_notify()/tcf_del_notify(). The
patch fixes act_gact, and the rest of actions will be updated in the
follow-up patches.

v3:
   Fixed tcf_action_fill_size() to return shared attrs length when
   action ->get_fill_size() isn't implemented.
v2:
   Restructured patches to make them bisectable.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>