/*
* 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>
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_warn("[%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, unsigned int exp_nbits,
const unsigned long *bmap, unsigned int nbits)
{
if (exp_nbits != nbits) {
pr_warn("[%s:%u] bitmap length mismatch: expected %u, got %u\n",
srcfile, line, exp_nbits, nbits);
return false;
}
if (!bitmap_equal(exp_bmap, bmap, nbits)) {
pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
srcfile, line,
exp_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)
{
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_fill_copy(void)
{
DECLARE_BITMAP(bmap1, 1024);
DECLARE_BITMAP(bmap2, 1024);
bitmap_zero(bmap1, 1024);
bitmap_zero(bmap2, 1024);
/* single-word bitmaps */
expect_eq_pbl("", bmap1, 23);
bitmap_fill(bmap1, 19);
expect_eq_pbl("0-18", bmap1, 1024);
bitmap_copy(bmap2, bmap1, 23);
expect_eq_pbl("0-18", bmap2, 1024);
bitmap_fill(bmap2, 23);
expect_eq_pbl("0-22", bmap2, 1024);
bitmap_copy(bmap2, bmap1, 23);
expect_eq_pbl("0-18", bmap2, 1024);
bitmap_zero(bmap1, 23);
expect_eq_pbl("", bmap1, 1024);
/* multi-word bitmaps */
bitmap_zero(bmap1, 1024);
expect_eq_pbl("", bmap1, 1024);
bitmap_fill(bmap1, 109);
expect_eq_pbl("0-108", bmap1, 1024);
bitmap_copy(bmap2, bmap1, 1024);
expect_eq_pbl("0-108", bmap2, 1024);
bitmap_fill(bmap2, 1024);
expect_eq_pbl("0-1023", 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);
bitmap_zero(bmap2, 97); /* ... but 0-padded til word length */
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[] __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(0x3333333311111111),
BITMAP_FROM_U64(0xffffffff77777777)
};
static const unsigned long exp2[] __initconst = {
BITMAP_FROM_U64(0x3333333311111111),
BITMAP_FROM_U64(0xffffffff77777777)
};
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, "0-31:1/4,32-63:2/4,64-95:3/4,96-127:4/4", 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);
DECLARE_BITMAP(bmap2, 1024);
u32 exp_arr[32], arr[32];
unsigned nbits;
for (nbits = 0 ; nbits < 257 ; ++nbits) {
const unsigned int used_u32s = DIV_ROUND_UP(nbits, 32);
unsigned int i, rv;
bitmap_zero(bmap1, nbits);
bitmap_set(bmap1, nbits, 1024 - nbits); /* garbage */
memset(arr, 0xff, sizeof(arr));
rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
expect_eq_uint(nbits, rv);
memset(exp_arr, 0xff, sizeof(exp_arr));
memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
expect_eq_u32_array(exp_arr, 32, arr, 32);
bitmap_fill(bmap2, 1024);
rv = bitmap_from_u32array(bmap2, nbits, arr, used_u32s);
expect_eq_uint(nbits, rv);
expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
for (i = 0 ; i < nbits ; ++i) {
/*
* test conversion bitmap -> u32[]
*/
bitmap_zero(bmap1, 1024);
__set_bit(i, bmap1);
bitmap_set(bmap1, nbits, 1024 - nbits); /* garbage */
memset(arr, 0xff, sizeof(arr));
rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
expect_eq_uint(nbits, rv);
/* 1st used u32 words contain expected bit set, the
* remaining words are left unchanged (0xff)
*/
memset(exp_arr, 0xff, sizeof(exp_arr));
memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
exp_arr[i/32] = (1U<<(i%32));
expect_eq_u32_array(exp_arr, 32, arr, 32);
/* same, with longer array to fill
*/
memset(arr, 0xff, sizeof(arr));
rv = bitmap_to_u32array(arr, 32, bmap1, nbits);
expect_eq_uint(nbits, rv);
/* 1st used u32 words contain expected bit set, the
* remaining words are all 0s
*/
memset(exp_arr, 0, sizeof(exp_arr));
exp_arr[i/32] = (1U<<(i%32));
expect_eq_u32_array(exp_arr, 32, arr, 32);
/*
* test conversion u32[] -> bitmap
*/
/* the 1st nbits of bmap2 are identical to
* bmap1, the remaining bits of bmap2 are left
* unchanged (all 1s)
*/
bitmap_fill(bmap2, 1024);
rv = bitmap_from_u32array(bmap2, nbits,
exp_arr, used_u32s);
expect_eq_uint(nbits, rv);
expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
/* same, with more bits to fill
*/
memset(arr, 0xff, sizeof(arr)); /* garbage */
memset(arr, 0, used_u32s*sizeof(u32));
arr[i/32] = (1U<<(i%32));
bitmap_fill(bmap2, 1024);
rv = bitmap_from_u32array(bmap2, 1024, arr, used_u32s);
expect_eq_uint(used_u32s*32, rv);
/* the 1st nbits of bmap2 are identical to
* bmap1, the remaining bits of bmap2 are cleared
*/
bitmap_zero(bmap1, 1024);
__set_bit(i, bmap1);
expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
/*
* test short conversion bitmap -> u32[] (1
* word too short)
*/
if (used_u32s > 1) {
bitmap_zero(bmap1, 1024);
__set_bit(i, bmap1);
bitmap_set(bmap1, nbits,
1024 - nbits); /* garbage */
memset(arr, 0xff, sizeof(arr));
rv = bitmap_to_u32array(arr, used_u32s - 1,
bmap1, nbits);
expect_eq_uint((used_u32s - 1)*32, rv);
/* 1st used u32 words contain expected
* bit set, the remaining words are
* left unchanged (0xff)
*/
memset(exp_arr, 0xff, sizeof(exp_arr));
memset(exp_arr, 0,
(used_u32s-1)*sizeof(*exp_arr));
if ((i/32) < (used_u32s - 1))
exp_arr[i/32] = (1U<<(i%32));
expect_eq_u32_array(exp_arr, 32, arr, 32);
}
/*
* test short conversion u32[] -> bitmap (3
* bits too short)
*/
if (nbits > 3) {
memset(arr, 0xff, sizeof(arr)); /* garbage */
memset(arr, 0, used_u32s*sizeof(*arr));
arr[i/32] = (1U<<(i%32));
bitmap_zero(bmap1, 1024);
rv = bitmap_from_u32array(bmap1, nbits - 3,
arr, used_u32s);
expect_eq_uint(nbits - 3, rv);
/* we are expecting the bit < nbits -
* 3 (none otherwise), and the rest of
* bmap1 unchanged (0-filled)
*/
bitmap_zero(bmap2, 1024);
if (i < nbits - 3)
__set_bit(i, bmap2);
expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
/* do the same with bmap1 initially
* 1-filled
*/
bitmap_fill(bmap1, 1024);
rv = bitmap_from_u32array(bmap1, nbits - 3,
arr, used_u32s);
expect_eq_uint(nbits - 3, rv);
/* we are expecting the bit < nbits -
* 3 (none otherwise), and the rest of
* bmap1 unchanged (1-filled)
*/
bitmap_zero(bmap2, 1024);
if (i < nbits - 3)
__set_bit(i, bmap2);
bitmap_set(bmap2, nbits-3, 1024 - nbits + 3);
expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
}
}
}
}
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) {
memset(bmap1, 0x5a, sizeof(bmap1));
memset(bmap2, 0x5a, sizeof(bmap2));
for (nbits = 0; nbits < 1024 - start; nbits += 8) {
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);
if (!__bitmap_equal(bmap1, bmap2, 1024))
printk("set not __equal %d %d\n", start, nbits);
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);
if (!__bitmap_equal(bmap1, bmap2, 1024))
printk("clear not __equal %d %d\n", start,
nbits);
}
}
}
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)
pr_info("all %u tests passed\n", total_tests);
else
pr_warn("failed %u out of %u tests\n",
failed_tests, total_tests);
return failed_tests ? -EINVAL : 0;
}
static void __exit test_bitmap_cleanup(void)
{
}
module_init(test_bitmap_init);
module_exit(test_bitmap_cleanup);
MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
MODULE_LICENSE("GPL");
