linux-kernel - [PATCH 6/6] lib/test_bitmap: add tests for bitmap_parselist

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Date:   Tue, 26 Mar 2019 00:07:48 +0300
From:   Yury Norov <yury.norov@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Arnd Bergmann <arnd@...db.de>,
        Kees Cook <keescook@...omium.org>,
        Matthew Wilcox <willy@...radead.org>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:     Yury Norov <ynorov@...vell.com>, Yury Norov <yury.norov@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] lib/test_bitmap: add tests for bitmap_parselist_user

Propagate existing bitmap_parselist() tests to bitmap_parselist_user().

Signed-off-by: Yury Norov <ynorov@...vell.com>
---
 lib/test_bitmap.c | 46 ++++++++++++++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 10 deletions(-)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 709424a788ee..d4ecac0da160 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -11,6 +11,7 @@
 #include <linux/printk.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/uaccess.h>
 
 static unsigned total_tests __initdata;
 static unsigned failed_tests __initdata;
@@ -278,39 +279,63 @@ static const struct test_bitmap_parselist parselist_tests[] __initconst = {
 	{-EINVAL, "0-\n", NULL, 8, 0},
 };
 
-static void __init test_bitmap_parselist(void)
+static void __init __test_bitmap_parselist(int is_user)
 {
 	int i;
 	int err;
 	ktime_t time;
 	DECLARE_BITMAP(bmap, 2048);
+	char *mode = is_user ? "_user"  : "";
 
 	for (i = 0; i < ARRAY_SIZE(parselist_tests); i++) {
 #define ptest parselist_tests[i]
 
-		time = ktime_get();
-		err = bitmap_parselist(ptest.in, bmap, ptest.nbits);
-		time = ktime_get() - time;
+		if (is_user) {
+			mm_segment_t orig_fs = get_fs();
+			size_t len = strlen(ptest.in);
+
+			set_fs(KERNEL_DS);
+			time = ktime_get();
+			err = bitmap_parselist_user(ptest.in, len,
+						    bmap, ptest.nbits);
+			time = ktime_get() - time;
+			set_fs(orig_fs);
+		} else {
+			time = ktime_get();
+			err = bitmap_parselist(ptest.in, bmap, ptest.nbits);
+			time = ktime_get() - time;
+		}
 
 		if (err != ptest.errno) {
-			pr_err("test %d: input is %s, errno is %d, expected %d\n",
-					i, ptest.in, err, ptest.errno);
+			pr_err("parselist%s: %d: input is %s, errno is %d, expected %d\n",
+					mode, i, ptest.in, err, ptest.errno);
 			continue;
 		}
 
 		if (!err && ptest.expected
 			 && !__bitmap_equal(bmap, ptest.expected, ptest.nbits)) {
-			pr_err("test %d: input is %s, result is 0x%lx, expected 0x%lx\n",
-					i, ptest.in, bmap[0], *ptest.expected);
+			pr_err("parselist%s: %d: input is %s, result is 0x%lx, expected 0x%lx\n",
+					mode, i, ptest.in, bmap[0],
+					*ptest.expected);
 			continue;
 		}
 
 		if (ptest.flags & PARSE_TIME)
-			pr_err("test %d: input is '%s' OK, Time: %llu\n",
-					i, ptest.in, time);
+			pr_err("parselist%s: %d: input is '%s' OK, Time: %llu\n",
+					mode, i, ptest.in, time);
 	}
 }
 
+static void __init test_bitmap_parselist(void)
+{
+	__test_bitmap_parselist(0);
+}
+
+static void __init test_bitmap_parselist_user(void)
+{
+	__test_bitmap_parselist(1);
+}
+
 #define EXP_BYTES	(sizeof(exp) * 8)
 
 static void __init test_bitmap_arr32(void)
@@ -383,6 +408,7 @@ static int __init test_bitmap_init(void)
 	test_copy();
 	test_bitmap_arr32();
 	test_bitmap_parselist();
+	test_bitmap_parselist_user();
 	test_mem_optimisations();
 
 	if (failed_tests == 0)
-- 
2.17.1