Merge branch 'mirred-batch-fixes'

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Roman Mashak says:

====================
Fix batched event generation for mirred action

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.
====================

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

...

This commit is contained in:

David S. Miller 2019-07-01 19:18:04 -07:00

parent 362b87f5b1 5d15a8ec2a

commit c8881faf6e

2 changed files with 100 additions and 0 deletions

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6

net/sched/act_mirred.c

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94

tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json

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