lib/test_bitmap.c: add test for bitmap_parselist()

Do some basic checks for bitmap_parselist().

[akpm@linux-foundation.org: fix printk warning]
Link: http://lkml.kernel.org/r/20170807225438.16161-2-ynorov@caviumnetworks.com
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Cc: Noam Camus <noamca@mellanox.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 2526a2975c51..431c97fb1aa0 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -165,6 +165,79 @@ static void __init test_zero_fill_copy(void)
         expect_eq_pbl("128-1023", bmap2, 1024);
 }
 
+#define PARSE_TIME 0x1
+
+struct test_bitmap_parselist{
+        const int errno;
+        const char *in;
+        const unsigned long *expected;
+        const int nbits;
+        const int flags;
+};
+
+static const unsigned long exp[] = {1, 2, 0x0000ffff, 0xffff0000, 0x55555555,
+                                0xaaaaaaaa, 0x11111111, 0x22222222, 0xffffffff,
+                                0xfffffffe, 0x3333333311111111, 0xffffffff77777777};
+static const unsigned long exp2[] = {0x3333333311111111, 0xffffffff77777777};
+
+static const struct test_bitmap_parselist parselist_tests[] __initconst = {
+        {0, "0",                        &exp[0], 8, 0},
+        {0, "1",                        &exp[1], 8, 0},
+        {0, "0-15",                     &exp[2], 32, 0},
+        {0, "16-31",                    &exp[3], 32, 0},
+        {0, "0-31:1/2",                 &exp[4], 32, 0},
+        {0, "1-31:1/2",                 &exp[5], 32, 0},
+        {0, "0-31:1/4",                 &exp[6], 32, 0},
+        {0, "1-31:1/4",                 &exp[7], 32, 0},
+        {0, "0-31:4/4",                 &exp[8], 32, 0},
+        {0, "1-31:4/4",                 &exp[9], 32, 0},
+        {0, "0-31:1/4,32-63:2/4",       &exp[10], 64, 0},
+        {0, "0-31:3/4,32-63:4/4",       &exp[11], 64, 0},
+
+        {0, "0-31:1/4,32-63:2/4,64-95:3/4,96-127:4/4",  exp2, 128, 0},
+
+        {0, "0-2047:128/256", NULL, 2048, PARSE_TIME},
+
+        {-EINVAL, "-1", NULL, 8, 0},
+        {-EINVAL, "-0", NULL, 8, 0},
+        {-EINVAL, "10-1", NULL, 8, 0},
+        {-EINVAL, "0-31:10/1", NULL, 8, 0},
+};
+
+static void __init test_bitmap_parselist(void)
+{
+        int i;
+        int err;
+        cycles_t cycles;
+        DECLARE_BITMAP(bmap, 2048);
+
+        for (i = 0; i < ARRAY_SIZE(parselist_tests); i++) {
+#define ptest parselist_tests[i]
+
+                cycles = get_cycles();
+                err = bitmap_parselist(ptest.in, bmap, ptest.nbits);
+                cycles = get_cycles() - cycles;
+
+                if (err != ptest.errno) {
+                        pr_err("test %d: input is %s, errno is %d, expected %d\n",
+                                        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);
+                        continue;
+                }
+
+                if (ptest.flags & PARSE_TIME)
+                        pr_err("test %d: input is '%s' OK, Time: %llu\n",
+                                        i, ptest.in,
+                                        (unsigned long long)cycles);
+        }
+}
+
 static void __init test_bitmap_u32_array_conversions(void)
 {
         DECLARE_BITMAP(bmap1, 1024);
@@ -365,6 +438,7 @@ static int __init test_bitmap_init(void)
 {
         test_zero_fill_copy();
         test_bitmap_u32_array_conversions();
+        test_bitmap_parselist();
         test_mem_optimisations();
 
         if (failed_tests == 0)