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 actions flush action gact
for i in `seq 1 $1`;
cmd="action pass index $i "
$TC actions add $args
% ./tc-batch.sh 32
Error: Failed to fill netlink attributes while deleting 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 act_police, and the rest of actions will be
updated in the follow-up patches.
Roman Mashak (5):
net sched actions: routines to calculate common TLVs size
net sched actions: add new tc_action_ops callback
net sched actions: calculate add/delete event message size.
net sched actions: implement get_fill_size routine in act_gact
net sched actions: implement get_fill_size routine in act_police
include/net/act_api.h | 6 ++++-
net/sched/act_api.c | 62 +++++++++++++++++++++++++++++++++++++++++++-------
net/sched/act_gact.c | 18 +++++++++++++++
net/sched/act_police.c | 9 ++++++++
net/sched/cls_api.c | 3 ++-
5 files changed, 88 insertions(+), 10 deletions(-)