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linux/lib/test_bitmap.c
Yury Norov 6ea86bdfc1 lib/test_bitmap: add tests for bitmap_parselist_user() 
Propagate existing bitmap_parselist() tests to bitmap_parselist_user().

Link: http://lkml.kernel.org/r/20190405173211.11373-6-ynorov@marvell.com
Signed-off-by: Yury Norov <ynorov@marvell.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Travis <travis@sgi.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14 19:52:49 -07:00

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/*
* Test cases for printf facility.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/bitmap.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include "../tools/testing/selftests/kselftest_module.h"
static unsigned total_tests __initdata;
static unsigned failed_tests __initdata;
static char pbl_buffer[PAGE_SIZE] __initdata;
static bool __init
__check_eq_uint(const char *srcfile, unsigned int line,
const unsigned int exp_uint, unsigned int x)
{
if (exp_uint != x) {
pr_err("[%s:%u] expected %u, got %u\n",
srcfile, line, exp_uint, x);
return false;
}
return true;
}
static bool __init
__check_eq_bitmap(const char *srcfile, unsigned int line,
const unsigned long *exp_bmap, const unsigned long *bmap,
unsigned int nbits)
{
if (!bitmap_equal(exp_bmap, bmap, nbits)) {
pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
srcfile, line,
nbits, exp_bmap, nbits, bmap);
return false;
}
return true;
}
static bool __init
__check_eq_pbl(const char *srcfile, unsigned int line,
const char *expected_pbl,
const unsigned long *bitmap, unsigned int nbits)
{
snprintf(pbl_buffer, sizeof(pbl_buffer), "%*pbl", nbits, bitmap);
if (strcmp(expected_pbl, pbl_buffer)) {
pr_warn("[%s:%u] expected \"%s\", got \"%s\"\n",
srcfile, line,
expected_pbl, pbl_buffer);
return false;
}
return true;
}
static bool __init
__check_eq_u32_array(const char *srcfile, unsigned int line,
const u32 *exp_arr, unsigned int exp_len,
const u32 *arr, unsigned int len) __used;
static bool __init
__check_eq_u32_array(const char *srcfile, unsigned int line,
const u32 *exp_arr, unsigned int exp_len,
const u32 *arr, unsigned int len)
{
if (exp_len != len) {
pr_warn("[%s:%u] array length differ: expected %u, got %u\n",
srcfile, line,
exp_len, len);
return false;
}
if (memcmp(exp_arr, arr, len*sizeof(*arr))) {
pr_warn("[%s:%u] array contents differ\n", srcfile, line);
print_hex_dump(KERN_WARNING, " exp: ", DUMP_PREFIX_OFFSET,
32, 4, exp_arr, exp_len*sizeof(*exp_arr), false);
print_hex_dump(KERN_WARNING, " got: ", DUMP_PREFIX_OFFSET,
32, 4, arr, len*sizeof(*arr), false);
return false;
}
return true;
}
#define __expect_eq(suffix, ...) \
({ \
int result = 0; \
total_tests++; \
if (!__check_eq_ ## suffix(__FILE__, __LINE__, \
##__VA_ARGS__)) { \
failed_tests++; \
result = 1; \
} \
result; \
})
#define expect_eq_uint(...) __expect_eq(uint, ##__VA_ARGS__)
#define expect_eq_bitmap(...) __expect_eq(bitmap, ##__VA_ARGS__)
#define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__)
#define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__)
static void __init test_zero_clear(void)
{
DECLARE_BITMAP(bmap, 1024);
/* Known way to set all bits */
memset(bmap, 0xff, 128);
expect_eq_pbl("0-22", bmap, 23);
expect_eq_pbl("0-1023", bmap, 1024);
/* single-word bitmaps */
bitmap_clear(bmap, 0, 9);
expect_eq_pbl("9-1023", bmap, 1024);
bitmap_zero(bmap, 35);
expect_eq_pbl("64-1023", bmap, 1024);
/* cross boundaries operations */
bitmap_clear(bmap, 79, 19);
expect_eq_pbl("64-78,98-1023", bmap, 1024);
bitmap_zero(bmap, 115);
expect_eq_pbl("128-1023", bmap, 1024);
/* Zeroing entire area */
bitmap_zero(bmap, 1024);
expect_eq_pbl("", bmap, 1024);
}
static void __init test_fill_set(void)
{
DECLARE_BITMAP(bmap, 1024);
/* Known way to clear all bits */
memset(bmap, 0x00, 128);
expect_eq_pbl("", bmap, 23);
expect_eq_pbl("", bmap, 1024);
/* single-word bitmaps */
bitmap_set(bmap, 0, 9);
expect_eq_pbl("0-8", bmap, 1024);
bitmap_fill(bmap, 35);
expect_eq_pbl("0-63", bmap, 1024);
/* cross boundaries operations */
bitmap_set(bmap, 79, 19);
expect_eq_pbl("0-63,79-97", bmap, 1024);
bitmap_fill(bmap, 115);
expect_eq_pbl("0-127", bmap, 1024);
/* Zeroing entire area */
bitmap_fill(bmap, 1024);
expect_eq_pbl("0-1023", bmap, 1024);
}
static void __init test_copy(void)
{
DECLARE_BITMAP(bmap1, 1024);
DECLARE_BITMAP(bmap2, 1024);
bitmap_zero(bmap1, 1024);
bitmap_zero(bmap2, 1024);
/* single-word bitmaps */
bitmap_set(bmap1, 0, 19);
bitmap_copy(bmap2, bmap1, 23);
expect_eq_pbl("0-18", bmap2, 1024);
bitmap_set(bmap2, 0, 23);
bitmap_copy(bmap2, bmap1, 23);
expect_eq_pbl("0-18", bmap2, 1024);
/* multi-word bitmaps */
bitmap_set(bmap1, 0, 109);
bitmap_copy(bmap2, bmap1, 1024);
expect_eq_pbl("0-108", bmap2, 1024);
bitmap_fill(bmap2, 1024);
bitmap_copy(bmap2, bmap1, 1024);
expect_eq_pbl("0-108", bmap2, 1024);
/* the following tests assume a 32- or 64-bit arch (even 128b
* if we care)
*/
bitmap_fill(bmap2, 1024);
bitmap_copy(bmap2, bmap1, 109); /* ... but 0-padded til word length */
expect_eq_pbl("0-108,128-1023", bmap2, 1024);
bitmap_fill(bmap2, 1024);
bitmap_copy(bmap2, bmap1, 97); /* ... but aligned on word length */
expect_eq_pbl("0-108,128-1023", 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[] __initconst = {
BITMAP_FROM_U64(1),
BITMAP_FROM_U64(2),
BITMAP_FROM_U64(0x0000ffff),
BITMAP_FROM_U64(0xffff0000),
BITMAP_FROM_U64(0x55555555),
BITMAP_FROM_U64(0xaaaaaaaa),
BITMAP_FROM_U64(0x11111111),
BITMAP_FROM_U64(0x22222222),
BITMAP_FROM_U64(0xffffffff),
BITMAP_FROM_U64(0xfffffffe),
BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0xffffffff77777777ULL),
BITMAP_FROM_U64(0),
};
static const unsigned long exp2[] __initconst = {
BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0xffffffff77777777ULL)
};
static const struct test_bitmap_parselist parselist_tests[] __initconst = {
#define step (sizeof(u64) / sizeof(unsigned long))
{0, "0", &exp[0], 8, 0},
{0, "1", &exp[1 * step], 8, 0},
{0, "0-15", &exp[2 * step], 32, 0},
{0, "16-31", &exp[3 * step], 32, 0},
{0, "0-31:1/2", &exp[4 * step], 32, 0},
{0, "1-31:1/2", &exp[5 * step], 32, 0},
{0, "0-31:1/4", &exp[6 * step], 32, 0},
{0, "1-31:1/4", &exp[7 * step], 32, 0},
{0, "0-31:4/4", &exp[8 * step], 32, 0},
{0, "1-31:4/4", &exp[9 * step], 32, 0},
{0, "0-31:1/4,32-63:2/4", &exp[10 * step], 64, 0},
{0, "0-31:3/4,32-63:4/4", &exp[11 * step], 64, 0},
{0, " ,, 0-31:3/4 ,, 32-63:4/4 ,, ", &exp[11 * step], 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},
{0, "", &exp[12 * step], 8, 0},
{0, "\n", &exp[12 * step], 8, 0},
{0, ",, ,, , , ,", &exp[12 * step], 8, 0},
{0, " , ,, , , ", &exp[12 * step], 8, 0},
{0, " , ,, , , \n", &exp[12 * step], 8, 0},
{-EINVAL, "-1", NULL, 8, 0},
{-EINVAL, "-0", NULL, 8, 0},
{-EINVAL, "10-1", NULL, 8, 0},
{-EINVAL, "0-31:", NULL, 8, 0},
{-EINVAL, "0-31:0", NULL, 8, 0},
{-EINVAL, "0-31:0/", NULL, 8, 0},
{-EINVAL, "0-31:0/0", NULL, 8, 0},
{-EINVAL, "0-31:1/0", NULL, 8, 0},
{-EINVAL, "0-31:10/1", NULL, 8, 0},
{-EOVERFLOW, "0-98765432123456789:10/1", NULL, 8, 0},
{-EINVAL, "a-31", NULL, 8, 0},
{-EINVAL, "0-a1", NULL, 8, 0},
{-EINVAL, "a-31:10/1", NULL, 8, 0},
{-EINVAL, "0-31:a/1", NULL, 8, 0},
{-EINVAL, "0-\n", NULL, 8, 0},
};
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]
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("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("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("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)
{
unsigned int nbits, next_bit;
u32 arr[sizeof(exp) / 4];
DECLARE_BITMAP(bmap2, EXP_BYTES);
memset(arr, 0xa5, sizeof(arr));
for (nbits = 0; nbits < EXP_BYTES; ++nbits) {
bitmap_to_arr32(arr, exp, nbits);
bitmap_from_arr32(bmap2, arr, nbits);
expect_eq_bitmap(bmap2, exp, nbits);
next_bit = find_next_bit(bmap2,
round_up(nbits, BITS_PER_LONG), nbits);
if (next_bit < round_up(nbits, BITS_PER_LONG))
pr_err("bitmap_copy_arr32(nbits == %d:"
" tail is not safely cleared: %d\n",
nbits, next_bit);
if (nbits < EXP_BYTES - 32)
expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
0xa5a5a5a5);
}
}
static void noinline __init test_mem_optimisations(void)
{
DECLARE_BITMAP(bmap1, 1024);
DECLARE_BITMAP(bmap2, 1024);
unsigned int start, nbits;
for (start = 0; start < 1024; start += 8) {
for (nbits = 0; nbits < 1024 - start; nbits += 8) {
memset(bmap1, 0x5a, sizeof(bmap1));
memset(bmap2, 0x5a, sizeof(bmap2));
bitmap_set(bmap1, start, nbits);
__bitmap_set(bmap2, start, nbits);
if (!bitmap_equal(bmap1, bmap2, 1024)) {
printk("set not equal %d %d\n", start, nbits);
failed_tests++;
}
if (!__bitmap_equal(bmap1, bmap2, 1024)) {
printk("set not __equal %d %d\n", start, nbits);
failed_tests++;
}
bitmap_clear(bmap1, start, nbits);
__bitmap_clear(bmap2, start, nbits);
if (!bitmap_equal(bmap1, bmap2, 1024)) {
printk("clear not equal %d %d\n", start, nbits);
failed_tests++;
}
if (!__bitmap_equal(bmap1, bmap2, 1024)) {
printk("clear not __equal %d %d\n", start,
nbits);
failed_tests++;
}
}
}
}
static void __init selftest(void)
{
test_zero_clear();
test_fill_set();
test_copy();
test_bitmap_arr32();
test_bitmap_parselist();
test_bitmap_parselist_user();
test_mem_optimisations();
}
KSTM_MODULE_LOADERS(test_bitmap);
MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
MODULE_LICENSE("GPL");
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