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samples: bpf: Fix lwt_len_hist reusing previous BPF map

[ Upstream commit 0afe0a998c ]

Currently, lwt_len_hist's map lwt_len_hist_map is uses pinning, and the
map isn't cleared on test end. This leds to reuse of that map for
each test, which prevents the results of the test from being accurate.

This commit fixes the problem by removing of pinned map from bpffs.
Also, this commit add the executable permission to shell script
files.

Fixes: f74599f7c5 ("bpf: Add tests and samples for LWT-BPF")
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20201124090310.24374-7-danieltimlee@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Daniel T. Lee 11 months ago
committed by Greg Kroah-Hartman
parent
commit
ceff135b9d
  1. 2
      samples/bpf/lwt_len_hist.sh
  2. 0
      samples/bpf/test_lwt_bpf.sh

2
samples/bpf/lwt_len_hist.sh

@ -8,6 +8,8 @@ VETH1=tst_lwt1b
TRACE_ROOT=/sys/kernel/debug/tracing
function cleanup {
# To reset saved histogram, remove pinned map
rm /sys/fs/bpf/tc/globals/lwt_len_hist_map
ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null
ip link del $VETH0 2> /dev/null
ip link del $VETH1 2> /dev/null

0
samples/bpf/test_lwt_bpf.sh

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