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selftests: livepatch: Check if replace sysfs attribute exists

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The commit adb68ed26a ("livepatch: Add "replace" sysfs attribute"),
merged in v6.11, introduced a new sysfs attribute.

In order to run the selftests on older kernels, check if given kernel
has support for the attribute. If the attribute is not supported, skip
the checks.

While at it, create a local variable to hold the module name to be
tested, instead of overwriting MOD_LIVEPATCH.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-5-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Marcos Paulo de Souza 2026-05-04 15:34:46 -03:00 committed by Petr Mladek
parent e6b71aefae
commit 1f4cbeec25
1 changed files with 45 additions and 38 deletions
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83
tools/testing/selftests/livepatch/test-sysfs.sh
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@ -9,6 +9,7 @@ MOD_LIVEPATCH2=test_klp_callbacks_demo
MOD_LIVEPATCH3=test_klp_syscall
HAS_PATCH_ATTR=0
HAS_REPLACE_ATTR=0
setup_config
@ -22,7 +23,6 @@ check_sysfs_rights "$MOD_LIVEPATCH" "" "drwxr-xr-x"
check_sysfs_rights "$MOD_LIVEPATCH" "enabled" "-rw-r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "enabled" "1"
check_sysfs_rights "$MOD_LIVEPATCH" "force" "--w-------"
check_sysfs_rights "$MOD_LIVEPATCH" "replace" "-r--r--r--"
check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "stack_order" "1"
check_sysfs_rights "$MOD_LIVEPATCH" "transition" "-r--r--r--"
@ -34,6 +34,11 @@ if does_sysfs_exist "$MOD_LIVEPATCH/vmlinux" "patched"; then
HAS_PATCH_ATTR=1
fi
if does_sysfs_exist "$MOD_LIVEPATCH" "replace"; then
check_sysfs_rights "$MOD_LIVEPATCH" "replace" "-r--r--r--"
HAS_REPLACE_ATTR=1
fi
disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH
@ -95,52 +100,54 @@ livepatch: '$MOD_LIVEPATCH2': unpatching complete
% rmmod $MOD_LIVEPATCH2"
fi
start_test "sysfs test replace enabled"
if [[ "$HAS_REPLACE_ATTR" == "1" ]]; then
start_test "sysfs test replace enabled"
MOD_LIVEPATCH=test_klp_atomic_replace
load_lp $MOD_LIVEPATCH replace=1
MOD_ATOMIC_REPLACE=test_klp_atomic_replace
load_lp $MOD_ATOMIC_REPLACE replace=1
check_sysfs_rights "$MOD_LIVEPATCH" "replace" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "replace" "1"
check_sysfs_rights "$MOD_ATOMIC_REPLACE" "replace" "-r--r--r--"
check_sysfs_value "$MOD_ATOMIC_REPLACE" "replace" "1"
disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH
disable_lp $MOD_ATOMIC_REPLACE
unload_lp $MOD_ATOMIC_REPLACE
check_result "% insmod test_modules/$MOD_LIVEPATCH.ko replace=1
livepatch: enabling patch '$MOD_LIVEPATCH'
livepatch: '$MOD_LIVEPATCH': initializing patching transition
livepatch: '$MOD_LIVEPATCH': starting patching transition
livepatch: '$MOD_LIVEPATCH': completing patching transition
livepatch: '$MOD_LIVEPATCH': patching complete
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
livepatch: '$MOD_LIVEPATCH': starting unpatching transition
livepatch: '$MOD_LIVEPATCH': completing unpatching transition
livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"
check_result "% insmod test_modules/$MOD_ATOMIC_REPLACE.ko replace=1
livepatch: enabling patch '$MOD_ATOMIC_REPLACE'
livepatch: '$MOD_ATOMIC_REPLACE': initializing patching transition
livepatch: '$MOD_ATOMIC_REPLACE': starting patching transition
livepatch: '$MOD_ATOMIC_REPLACE': completing patching transition
livepatch: '$MOD_ATOMIC_REPLACE': patching complete
% echo 0 > $SYSFS_KLP_DIR/$MOD_ATOMIC_REPLACE/enabled
livepatch: '$MOD_ATOMIC_REPLACE': initializing unpatching transition
livepatch: '$MOD_ATOMIC_REPLACE': starting unpatching transition
livepatch: '$MOD_ATOMIC_REPLACE': completing unpatching transition
livepatch: '$MOD_ATOMIC_REPLACE': unpatching complete
% rmmod $MOD_ATOMIC_REPLACE"
start_test "sysfs test replace disabled"
start_test "sysfs test replace disabled"
load_lp $MOD_LIVEPATCH replace=0
load_lp $MOD_ATOMIC_REPLACE replace=0
check_sysfs_rights "$MOD_LIVEPATCH" "replace" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "replace" "0"
check_sysfs_rights "$MOD_ATOMIC_REPLACE" "replace" "-r--r--r--"
check_sysfs_value "$MOD_ATOMIC_REPLACE" "replace" "0"
disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH
disable_lp $MOD_ATOMIC_REPLACE
unload_lp $MOD_ATOMIC_REPLACE
check_result "% insmod test_modules/$MOD_LIVEPATCH.ko replace=0
livepatch: enabling patch '$MOD_LIVEPATCH'
livepatch: '$MOD_LIVEPATCH': initializing patching transition
livepatch: '$MOD_LIVEPATCH': starting patching transition
livepatch: '$MOD_LIVEPATCH': completing patching transition
livepatch: '$MOD_LIVEPATCH': patching complete
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
livepatch: '$MOD_LIVEPATCH': starting unpatching transition
livepatch: '$MOD_LIVEPATCH': completing unpatching transition
livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"
check_result "% insmod test_modules/$MOD_ATOMIC_REPLACE.ko replace=0
livepatch: enabling patch '$MOD_ATOMIC_REPLACE'
livepatch: '$MOD_ATOMIC_REPLACE': initializing patching transition
livepatch: '$MOD_ATOMIC_REPLACE': starting patching transition
livepatch: '$MOD_ATOMIC_REPLACE': completing patching transition
livepatch: '$MOD_ATOMIC_REPLACE': patching complete
% echo 0 > $SYSFS_KLP_DIR/$MOD_ATOMIC_REPLACE/enabled
livepatch: '$MOD_ATOMIC_REPLACE': initializing unpatching transition
livepatch: '$MOD_ATOMIC_REPLACE': starting unpatching transition
livepatch: '$MOD_ATOMIC_REPLACE': completing unpatching transition
livepatch: '$MOD_ATOMIC_REPLACE': unpatching complete
% rmmod $MOD_ATOMIC_REPLACE"
fi
start_test "sysfs test stack_order value"