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selftests: bpf: Skip write only files in debugfs 

DebugFS for netdevsim now contains some "action trigger" files
which are write only. Don't try to capture the contents of those.

Note that we can't use os.access() because the script requires
root.

Fixes: 4418f862d6 ("netdevsim: implement support for devlink region and snapshots")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2019-10-31 20:06:58 -07:00 committed by David S. Miller
parent d64479a3e3
commit 8101e06941
1 changed files with 5 additions and 0 deletions
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5
tools/testing/selftests/bpf/test_offload.py
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@ -22,6 +22,7 @@ import os
import pprint import pprint
import random import random
import re import re
import stat
import string import string
import struct import struct
import subprocess import subprocess
@ -311,7 +312,11 @@ class DebugfsDir:
for f in out.split(): for f in out.split():
if f == "ports": if f == "ports":
continue continue
p = os.path.join(path, f) p = os.path.join(path, f)
if not os.stat(p).st_mode & stat.S_IRUSR:
continue
if os.path.isfile(p): if os.path.isfile(p):
_, out = cmd('cat %s/%s' % (path, f)) _, out = cmd('cat %s/%s' % (path, f))
dfs[f] = out.strip() dfs[f] = out.strip()