Re: [PATCH net-next 0/2] Fix batched event generation for mirred action

[David Miller <davem@davemloft.net>]

From: Roman Mashak <mrv@mojatatu.com>
Date: Fri, 28 Jun 2019 14:30:16 -0400

> 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 mirred
> for i in `seq 1 $1`;
> do
>    cmd="action mirred egress redirect dev lo 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
> %
> 
> patch 1 adds callback in tc_action_ops of mirred action, which calculates
> the action size, and passes size to tcf_add_notify()/tcf_del_notify().
> 
> patch 2 updates the TDC test suite with relevant test cases.

Series applied, thanks.