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samples: bpf: Fix lwt_len_hist reusing previous BPF map

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[ Upstream commit 0afe0a998c40085a6342e1aeb4c510cccba46caf ]

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>
This commit is contained in:
Daniel T. Lee 2020-11-24 09:03:09 +00:00 committed by Greg Kroah-Hartman
parent 4dc1360203
commit ceff135b9d
2 changed files with 2 additions and 0 deletions
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2
samples/bpf/lwt_len_hist.sh Normal file → Executable file
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@ -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 Normal file → Executable file
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