common/rc: introduce _page_size_equals helper to skip incompatible tests

Introduce a new helper function `_get_page_size` to get system page size, and
`_page_size_equals()` to check the whether system page size equal one value.
 Update `scsi/011` and `zbd/010` to use this helper and gracefully skip the
tests if the page size is not 4096 bytes. This prevents test failures on non-4K
page architectures.

Fixes: #234
Suggested-by: Bart Van Assche <[email protected]>
Signed-off-by: Yi Zhang <[email protected]>

Author: yizhanglinux

common/rc

@@ -552,6 +552,31 @@ _have_systemctl_unit() {
 	return 0
 }
 
+# Get system page size from kernel conguration
+_get_page_size() {
+	local page_shift
+
+	page_shift=$(_get_kernel_option PAGE_SHIFT)
+
+	echo $((1<< page_shift))
+}
+
+# Check if the system page size matches the required size (in bytes).
+# Example: _page_size_equals 4096
+_page_size_equals() {
+	local required_size="$1"
+	local current_size
+
+	current_size=$(_get_page_size)
+
+	if [ "$current_size" -ne "$required_size" ]; then
+		SKIP_REASONS+=("This test requires ${required_size} bytes page size, but system has ${current_size} bytes")
+		return 1
+	fi
+
+	return 0
+}
+
 _systemctl_start() {
 	local unit="$1"
 

tests/scsi/011

@@ -17,6 +17,7 @@ requires() {
 	_have_kver 6 10
 	_have_program mkfs.f2fs
 	_have_scsi_debug_group_number_stats
+	_page_size_equals 4096
 }
 
 run_test() {

tests/zbd/010

@@ -16,6 +16,7 @@ requires() {
 	_have_module_param scsi_debug zone_cap_mb
 	_have_program mkfs.f2fs
 	_have_module scsi_debug
+	_page_size_equals 4096
 }
 
 test() {