samples: bpf: Fix lwt_len_hist reusing previous BPF map

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: f74599f ("bpf: Add tests and samples for LWT-BPF") Signed-off-by: Daniel T. Lee <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
niw · Nov 27, 2020 · 0afe0a9 · 0afe0a9
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commit 0afe0a9
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diff --git a/samples/bpf/lwt_len_hist.sh b/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

diff --git a/samples/bpf/test_lwt_bpf.sh b/samples/bpf/test_lwt_bpf.sh