[LTP] [PATCH 4/5] Add support for setting loop device size in shell tests

[Martin Doucha]

Add TST_DEVICE_SIZE variable to set loop device size.

Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---
 doc/developers/writing_tests.rst | 2 +-
 testcases/lib/tst_test.sh        | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/developers/writing_tests.rst b/doc/developers/writing_tests.rst
index 2293800a1..ab633121e 100644
--- a/doc/developers/writing_tests.rst
+++ b/doc/developers/writing_tests.rst
@@ -390,7 +390,7 @@ LTP C And Shell Test API Comparison
       - TST_FS_TYPE
 
     * - .dev_min_size
-      - not applicable
+      - TST_DEVICE_SIZE
 
     * - .format_device
       - TST_FORMAT_DEVICE
diff --git a/testcases/lib/tst_test.sh b/testcases/lib/tst_test.sh
index c19c30b76..cfdae0230 100644
--- a/testcases/lib/tst_test.sh
+++ b/testcases/lib/tst_test.sh
@@ -687,6 +687,7 @@ tst_run()
 			CHECKPOINT_WAKE2|CHECKPOINT_WAKE_AND_WAIT);;
 			DEV_EXTRA_OPTS|DEV_FS_OPTS|FORMAT_DEVICE|MOUNT_DEVICE);;
 			SKIP_FILESYSTEMS|SKIP_IN_LOCKDOWN|SKIP_IN_SECUREBOOT);;
+			DEVICE_SIZE);;
 			*) tst_res TWARN "Reserved variable TST_$_tst_i used!";;
 			esac
 		done
@@ -750,7 +751,7 @@ tst_run()
 
 	# needs to be after cd $TST_TMPDIR to keep test_dev.img under $TST_TMPDIR
 	if [ "$TST_NEEDS_DEVICE" = 1 ]; then
-		TST_DEVICE=$(tst_device acquire)
+		TST_DEVICE=$(tst_device acquire $TST_DEVICE_SIZE)
 
 		if [ ! -b "$TST_DEVICE" -o $? -ne 0 ]; then
 			unset TST_DEVICE
-- 
2.46.0