lib/tst_test.sh: add TST_NEEDS_DRIVERS parameter

The drivers are checked with 'tst_check_drivers' command.

Signed-off-by: Alexey Kodanev <[email protected]>
Reviewed-by: Petr Vorel <[email protected]>
Reviewed-by: Cyril Hrubis <[email protected]>

Author: akodanev

doc/test-writing-guidelines.txt

@@ -1662,6 +1662,7 @@ simply by setting right '$TST_NEEDS_FOO'.
 | 'TST_NEEDS_CMDS'   | String with command names that has to be present for
                        the test (see below).
 | 'TST_NEEDS_MODULE' | Test module name needed for the test (see below).
+| 'TST_NEEDS_DRIVERS'| Checks kernel drivers support for the test.
 |=============================================================================
 
 Checking for presence of commands

testcases/lib/tst_test.sh

@@ -302,6 +302,18 @@ tst_check_cmds()
 	return 0
 }
 
+tst_test_drivers()
+{
+	[ $# -eq 0 ] && return 0
+
+	local drv
+
+	drv="$(tst_check_drivers $@ 2>&1)"
+
+	[ $? -ne 0 ] && tst_brk TCONF "$drv driver not available"
+	return 0
+}
+
 tst_is_int()
 {
 	[ "$1" -eq "$1" ] 2>/dev/null
@@ -349,6 +361,7 @@ tst_run()
 			OPTS|USAGE|PARSE_ARGS|POS_ARGS);;
 			NEEDS_ROOT|NEEDS_TMPDIR|NEEDS_DEVICE|DEVICE);;
 			NEEDS_CMDS|NEEDS_MODULE|MODPATH|DATAROOT);;
+			NEEDS_DRIVERS);;
 			IPV6|IPVER|TEST_DATA|TEST_DATA_IFS);;
 			RETRY_FUNC|RETRY_FN_EXP_BACKOFF);;
 			*) tst_res TWARN "Reserved variable TST_$_tst_i used!";;
@@ -386,6 +399,7 @@ tst_run()
 	fi
 
 	tst_test_cmds $TST_NEEDS_CMDS
+	tst_test_drivers $TST_NEEDS_DRIVERS
 
 	if [ -n "$TST_MIN_KVER" ]; then
 		tst_kvcmp -lt "$TST_MIN_KVER" && \