[PATCH 0/1] selftests: livepatch: add test cases of stack_order sysfs

[PATCH 0/1] selftests: livepatch: add test cases of stack_order sysfs

[Wardenjohn]

This patch add self test cases to 'stack_order' sysfs interface.

I found some existing test modules dont set '.replace=true', which can be used
in 'stack_order' test. So, use the existing module for selftests.

Regards.
Wardenjohn.

[PATCH] selftests: livepatch: add test cases of stack_order sysfs interface

[Wardenjohn]

Add selftest test cases to sysfs attribute 'stack_order'.

Signed-off-by: Wardenjohn <zhangwarden@gmail.com>
---
 .../testing/selftests/livepatch/test-sysfs.sh | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh
index 05a14f5a7bfb..71a2e95636b1 100755
--- a/tools/testing/selftests/livepatch/test-sysfs.sh
+++ b/tools/testing/selftests/livepatch/test-sysfs.sh
@@ -5,6 +5,8 @@
 . $(dirname $0)/functions.sh
 
 MOD_LIVEPATCH=test_klp_livepatch
+MOD_LIVEPATCH2=test_klp_callbacks_demo
+MOD_LIVEPATCH3=test_klp_syscall
 
 setup_config
 
@@ -131,4 +133,76 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition
 livepatch: '$MOD_LIVEPATCH': unpatching complete
 % rmmod $MOD_LIVEPATCH"
 
+start_test "sysfs test stack_order read"
+
+load_lp $MOD_LIVEPATCH
+
+check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
+check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
+
+load_lp $MOD_LIVEPATCH2
+
+check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
+check_sysfs_value  "$MOD_LIVEPATCH2" "stack_order" "2"
+
+load_lp $MOD_LIVEPATCH3
+
+check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
+check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "3"
+
+disable_lp $MOD_LIVEPATCH2
+unload_lp $MOD_LIVEPATCH2
+
+check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
+check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
+check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
+check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "2"
+
+disable_lp $MOD_LIVEPATCH3
+unload_lp $MOD_LIVEPATCH3
+
+disable_lp $MOD_LIVEPATCH
+unload_lp $MOD_LIVEPATCH
+
+check_result "% insmod test_modules/$MOD_LIVEPATCH.ko
+livepatch: enabling patch '$MOD_LIVEPATCH'
+livepatch: '$MOD_LIVEPATCH': initializing patching transition
+livepatch: '$MOD_LIVEPATCH': starting patching transition
+livepatch: '$MOD_LIVEPATCH': completing patching transition
+livepatch: '$MOD_LIVEPATCH': patching complete
+% insmod test_modules/$MOD_LIVEPATCH2.ko
+livepatch: enabling patch '$MOD_LIVEPATCH2'
+livepatch: '$MOD_LIVEPATCH2': initializing patching transition
+$MOD_LIVEPATCH2: pre_patch_callback: vmlinux
+livepatch: '$MOD_LIVEPATCH2': starting patching transition
+livepatch: '$MOD_LIVEPATCH2': completing patching transition
+$MOD_LIVEPATCH2: post_patch_callback: vmlinux
+livepatch: '$MOD_LIVEPATCH2': patching complete
+% insmod test_modules/$MOD_LIVEPATCH3.ko
+livepatch: enabling patch '$MOD_LIVEPATCH3'
+livepatch: '$MOD_LIVEPATCH3': initializing patching transition
+livepatch: '$MOD_LIVEPATCH3': starting patching transition
+livepatch: '$MOD_LIVEPATCH3': completing patching transition
+livepatch: '$MOD_LIVEPATCH3': patching complete
+% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled
+livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
+$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
+livepatch: '$MOD_LIVEPATCH2': starting unpatching transition
+livepatch: '$MOD_LIVEPATCH2': completing unpatching transition
+$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux
+livepatch: '$MOD_LIVEPATCH2': unpatching complete
+% rmmod $MOD_LIVEPATCH2
+% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH3/enabled
+livepatch: '$MOD_LIVEPATCH3': initializing unpatching transition
+livepatch: '$MOD_LIVEPATCH3': starting unpatching transition
+livepatch: '$MOD_LIVEPATCH3': completing unpatching transition
+livepatch: '$MOD_LIVEPATCH3': unpatching complete
+% rmmod $MOD_LIVEPATCH3
+% echo 0 > /sys/kernel/livepatch/$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"
+
 exit 0
-- 
2.43.5

Re: [PATCH] selftests: livepatch: add test cases of stack_order sysfs interface

[zhang warden]

> On Oct 11, 2024, at 23:11, Wardenjohn <zhangwarden@gmail.com> wrote:
> 
> Add selftest test cases to sysfs attribute 'stack_order'.
> 
> Signed-off-by: Wardenjohn <zhangwarden@gmail.com>
> ---
> .../testing/selftests/livepatch/test-sysfs.sh | 74 +++++++++++++++++++
> 1 file changed, 74 insertions(+)
> 
> diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh
> index 05a14f5a7bfb..71a2e95636b1 100755
> --- a/tools/testing/selftests/livepatch/test-sysfs.sh
> +++ b/tools/testing/selftests/livepatch/test-sysfs.sh
> @@ -5,6 +5,8 @@
> . $(dirname $0)/functions.sh
> 
> MOD_LIVEPATCH=test_klp_livepatch
> +MOD_LIVEPATCH2=test_klp_callbacks_demo
> +MOD_LIVEPATCH3=test_klp_syscall
> 
> setup_config
> 
> @@ -131,4 +133,76 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition
> livepatch: '$MOD_LIVEPATCH': unpatching complete
> % rmmod $MOD_LIVEPATCH"
> 
> +start_test "sysfs test stack_order read"
> +
> +load_lp $MOD_LIVEPATCH
> +
> +check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
> +
> +load_lp $MOD_LIVEPATCH2
> +
> +check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH2" "stack_order" "2"
> +
> +load_lp $MOD_LIVEPATCH3
> +
> +check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "3"
> +
> +disable_lp $MOD_LIVEPATCH2
> +unload_lp $MOD_LIVEPATCH2
> +
> +check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
> +check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "2"
> +
> +disable_lp $MOD_LIVEPATCH3
> +unload_lp $MOD_LIVEPATCH3
> +
> +disable_lp $MOD_LIVEPATCH
> +unload_lp $MOD_LIVEPATCH
> +
> +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko
> +livepatch: enabling patch '$MOD_LIVEPATCH'
> +livepatch: '$MOD_LIVEPATCH': initializing patching transition
> +livepatch: '$MOD_LIVEPATCH': starting patching transition
> +livepatch: '$MOD_LIVEPATCH': completing patching transition
> +livepatch: '$MOD_LIVEPATCH': patching complete
> +% insmod test_modules/$MOD_LIVEPATCH2.ko
> +livepatch: enabling patch '$MOD_LIVEPATCH2'
> +livepatch: '$MOD_LIVEPATCH2': initializing patching transition
> +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux
> +livepatch: '$MOD_LIVEPATCH2': starting patching transition
> +livepatch: '$MOD_LIVEPATCH2': completing patching transition
> +$MOD_LIVEPATCH2: post_patch_callback: vmlinux
> +livepatch: '$MOD_LIVEPATCH2': patching complete
> +% insmod test_modules/$MOD_LIVEPATCH3.ko
> +livepatch: enabling patch '$MOD_LIVEPATCH3'
> +livepatch: '$MOD_LIVEPATCH3': initializing patching transition
> +livepatch: '$MOD_LIVEPATCH3': starting patching transition
> +livepatch: '$MOD_LIVEPATCH3': completing patching transition
> +livepatch: '$MOD_LIVEPATCH3': patching complete
> +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled
> +livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
> +$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
> +livepatch: '$MOD_LIVEPATCH2': starting unpatching transition
> +livepatch: '$MOD_LIVEPATCH2': completing unpatching transition
> +$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux
> +livepatch: '$MOD_LIVEPATCH2': unpatching complete
> +% rmmod $MOD_LIVEPATCH2
> +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH3/enabled
> +livepatch: '$MOD_LIVEPATCH3': initializing unpatching transition
> +livepatch: '$MOD_LIVEPATCH3': starting unpatching transition
> +livepatch: '$MOD_LIVEPATCH3': completing unpatching transition
> +livepatch: '$MOD_LIVEPATCH3': unpatching complete
> +% rmmod $MOD_LIVEPATCH3
> +% echo 0 > /sys/kernel/livepatch/$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"
> +
> exit 0
> -- 
> 2.43.5
> 

Hi, maintainers.

Any suggestions of this selftest case?

Regards.
Wardenjohn

Re: [PATCH] selftests: livepatch: add test cases of stack_order sysfs interface

[Petr Mladek]

On Fri 2024-10-11 23:11:51, Wardenjohn wrote:
> Add selftest test cases to sysfs attribute 'stack_order'.
> 
> Signed-off-by: Wardenjohn <zhangwarden@gmail.com>
> ---
>  .../testing/selftests/livepatch/test-sysfs.sh | 74 +++++++++++++++++++
>  1 file changed, 74 insertions(+)
> 
> diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh
> index 05a14f5a7bfb..71a2e95636b1 100755
> --- a/tools/testing/selftests/livepatch/test-sysfs.sh
> +++ b/tools/testing/selftests/livepatch/test-sysfs.sh
> @@ -5,6 +5,8 @@
>  . $(dirname $0)/functions.sh
>  
>  MOD_LIVEPATCH=test_klp_livepatch
> +MOD_LIVEPATCH2=test_klp_callbacks_demo
> +MOD_LIVEPATCH3=test_klp_syscall
>  
>  setup_config
>  
> @@ -131,4 +133,76 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition
>  livepatch: '$MOD_LIVEPATCH': unpatching complete
>  % rmmod $MOD_LIVEPATCH"
>  
> +start_test "sysfs test stack_order read"

s/read/value/

> +
> +load_lp $MOD_LIVEPATCH
> +
> +check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"

The access rights should be rather tested in the 1st test in
test-sysfs.sh. We do not need to check it repeatedly here.

> +check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
> +
> +load_lp $MOD_LIVEPATCH2
> +
> +check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"

Same here...

> +check_sysfs_value  "$MOD_LIVEPATCH2" "stack_order" "2"
> +
> +load_lp $MOD_LIVEPATCH3
> +
> +check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "3"
> +
> +disable_lp $MOD_LIVEPATCH2
> +unload_lp $MOD_LIVEPATCH2
> +
> +check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
> +check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
> +check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "2"
> +
> +disable_lp $MOD_LIVEPATCH3
> +unload_lp $MOD_LIVEPATCH3
> +
> +disable_lp $MOD_LIVEPATCH
> +unload_lp $MOD_LIVEPATCH

Otherwise, it looks good to me.

Just to make it clear, I suggest to do the following changes:

diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh
index 71a2e95636b1..e44a051be307 100755
--- a/tools/testing/selftests/livepatch/test-sysfs.sh
+++ b/tools/testing/selftests/livepatch/test-sysfs.sh
@@ -21,6 +21,8 @@ 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 "$MOD_LIVEPATCH" "transition" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH" "transition" "0"
 check_sysfs_rights "$MOD_LIVEPATCH" "vmlinux/patched" "-r--r--r--"
@@ -133,29 +135,24 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition
 livepatch: '$MOD_LIVEPATCH': unpatching complete
 % rmmod $MOD_LIVEPATCH"
 
-start_test "sysfs test stack_order read"
+start_test "sysfs test stack_order value"
 
 load_lp $MOD_LIVEPATCH
 
-check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
 
 load_lp $MOD_LIVEPATCH2
 
-check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH2" "stack_order" "2"
 
 load_lp $MOD_LIVEPATCH3
 
-check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "3"
 
 disable_lp $MOD_LIVEPATCH2
 unload_lp $MOD_LIVEPATCH2
 
-check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
-check_sysfs_rights "$MOD_LIVEPATCH3" "stack_order" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "2"
 
 disable_lp $MOD_LIVEPATCH3


With the above changes:

Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>

Please, try to send the next version together with the patch adding
the "stack_order" attribute.

Best Regards,
Petr

Re: [PATCH] selftests: livepatch: add test cases of stack_order sysfs interface

[zhang warden]

Hi, Petr.
> On Oct 23, 2024, at 20:38, Petr Mladek <pmladek@suse.com> wrote:
> 
> Please, try to send the next version together with the patch adding
> the "stack_order" attribute.
> 

Do you mean I should resend the patch of "livepatch: Add stack_order sysfs attribute" again with this "livepatch selftest" patch?

Regards.
Wardenjohn.

Re: [PATCH] selftests: livepatch: add test cases of stack_order sysfs interface

[zhang warden]

What's more, I have open a pull request of the user space tool kpatch[1] 
to use this new kernel sysfs attribute 'stack_order'.

Maintainers who feel interesting in this function can come for a look.

Best Regards.
Wardenjohn.

[1]: https://github.com/dynup/kpatch/pull/1419