Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/bash
2# perf trace enum augmentation tests
3# SPDX-License-Identifier: GPL-2.0
4
5err=0
6
7syscall="landlock_add_rule"
8non_syscall="timer:hrtimer_start"
9
10TESTPROG="perf test -w landlock"
11
12# shellcheck source=lib/probe.sh
13. "$(dirname $0)"/lib/probe.sh
14skip_if_no_perf_trace || exit 2
15[ "$(id -u)" = 0 ] || exit 2
16
17check_vmlinux() {
18 echo "Checking if vmlinux exists"
19 if [ ! -f /sys/kernel/btf/vmlinux ]
20 then
21 echo "trace+enum test [Skipped missing vmlinux BTF support]"
22 err=2
23 fi
24}
25
26check_permissions() {
27 if perf trace -e $syscall $TESTPROG 2>&1 | grep -q "Operation not permitted"
28 then
29 echo "trace+enum test [Skipped permissions]"
30 err=2
31 fi
32}
33
34trace_landlock() {
35 echo "Tracing syscall ${syscall}"
36
37 # test flight just to see if landlock_add_rule is available
38 if ! perf trace $TESTPROG 2>&1 | grep -q landlock
39 then
40 echo "No landlock system call found, skipping to non-syscall tracing."
41 return
42 fi
43
44 output="$(perf trace -e $syscall $TESTPROG 2>&1)"
45 if echo "$output" | grep -q -E ".*landlock_add_rule\(ruleset_fd: 11, rule_type: (LANDLOCK_RULE_PATH_BENEATH|LANDLOCK_RULE_NET_PORT), rule_attr: 0x[a-f0-9]+, flags: 45\) = -1.*"
46 then
47 err=0
48 else
49 printf "[syscall failure] Failed to trace syscall $syscall, output:\n$output\n"
50 err=1
51 fi
52}
53
54trace_non_syscall() {
55 echo "Tracing non-syscall tracepoint ${non_syscall}"
56 output="$(perf trace -e $non_syscall --max-events=1 2>&1)"
57 if echo "$output" | grep -q -E '.*timer:hrtimer_.*\(.*mode: HRTIMER_MODE_.*\)$'
58 then
59 err=0
60 else
61 printf "[tracepoint failure] Failed to trace tracepoint $non_syscall, output:\n$output\n"
62 err=1
63 fi
64}
65
66check_vmlinux
67if [ $err = 0 ]; then
68 check_permissions
69fi
70
71if [ $err = 0 ]; then
72 trace_landlock
73fi
74
75if [ $err = 0 ]; then
76 trace_non_syscall
77fi
78
79exit $err