diff options
| author | Michael Vetter <mvetter@suse.com> | 2024-10-17 22:01:31 +0200 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2024-10-22 17:13:11 +0200 |
| commit | 59766286b6e54f8ad334dcef7d2e743b7550df0e (patch) | |
| tree | eb98479ec72253fc8d7890e214c969abdd5ed47a /tools/testing/selftests/livepatch/functions.sh | |
| parent | 637c730998b8f440dc5d0c6bae254fbf19143ea4 (diff) | |
| download | linux-59766286b6e54f8ad334dcef7d2e743b7550df0e.tar.gz linux-59766286b6e54f8ad334dcef7d2e743b7550df0e.tar.bz2 linux-59766286b6e54f8ad334dcef7d2e743b7550df0e.zip | |
selftests: livepatch: save and restore kprobe state
Save the state of /sys/kernel/debug/kprobes/enabled
during setup_config() and restore it during cleanup().
This is in preparation for a future commit that will add a test
that should confirm that we cannot livepatch a kprobed function
if that kprobe has a post handler.
Signed-off-by: Michael Vetter <mvetter@suse.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Joe Lawrence <joe.lawrence@redhat.com>
Tested-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20241017200132.21946-3-mvetter@suse.com
[pmladek@suse.com: Added few more substitutions in test-syscall.sh]
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'tools/testing/selftests/livepatch/functions.sh')
| -rw-r--r-- | tools/testing/selftests/livepatch/functions.sh | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/tools/testing/selftests/livepatch/functions.sh b/tools/testing/selftests/livepatch/functions.sh index 7bdfe668127b..e5d06fb40233 100644 --- a/tools/testing/selftests/livepatch/functions.sh +++ b/tools/testing/selftests/livepatch/functions.sh @@ -6,7 +6,10 @@ MAX_RETRIES=600 RETRY_INTERVAL=".1" # seconds -SYSFS_KLP_DIR="/sys/kernel/livepatch" +SYSFS_KERNEL_DIR="/sys/kernel" +SYSFS_KLP_DIR="$SYSFS_KERNEL_DIR/livepatch" +SYSFS_DEBUG_DIR="$SYSFS_KERNEL_DIR/debug" +SYSFS_KPROBES_DIR="$SYSFS_DEBUG_DIR/kprobes" # Kselftest framework requirement - SKIP code is 4 ksft_skip=4 @@ -55,22 +58,26 @@ function die() { } function push_config() { - DYNAMIC_DEBUG=$(grep '^kernel/livepatch' /sys/kernel/debug/dynamic_debug/control | \ + DYNAMIC_DEBUG=$(grep '^kernel/livepatch' "$SYSFS_DEBUG_DIR/dynamic_debug/control" | \ awk -F'[: ]' '{print "file " $1 " line " $2 " " $4}') FTRACE_ENABLED=$(sysctl --values kernel.ftrace_enabled) + KPROBE_ENABLED=$(cat "$SYSFS_KPROBES_DIR/enabled") } function pop_config() { if [[ -n "$DYNAMIC_DEBUG" ]]; then - echo -n "$DYNAMIC_DEBUG" > /sys/kernel/debug/dynamic_debug/control + echo -n "$DYNAMIC_DEBUG" > "$SYSFS_DEBUG_DIR/dynamic_debug/control" fi if [[ -n "$FTRACE_ENABLED" ]]; then sysctl kernel.ftrace_enabled="$FTRACE_ENABLED" &> /dev/null fi + if [[ -n "$KPROBE_ENABLED" ]]; then + echo "$KPROBE_ENABLED" > "$SYSFS_KPROBES_DIR/enabled" + fi } function set_dynamic_debug() { - cat <<-EOF > /sys/kernel/debug/dynamic_debug/control + cat <<-EOF > "$SYSFS_DEBUG_DIR/dynamic_debug/control" file kernel/livepatch/* +p func klp_try_switch_task -p EOF |