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linux/lib/test_bitmap.c
Alexander Lobakin 30fd8cdf53 lib/test_bitmap: test the tail after bitmap_to_arr64() 
Currently, test_bitmap_arr64() only tests bitmap_to_arr64()'s sanity
by comparing the result of double-conversion (bm -> arr64 -> bm2)
with the input bitmap. However, this may be not enough when one side
hides bugs of the second one (e.g. tail clearing, which is being
performed by both).
Expand the tests and check the tail of the actual arr64 used as
a temporary buffer for double-converting.

Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
2022-07-12 08:00:50 -07:00

960 lines
31 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Test cases for bitmap API.
*/
#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"
KSTM_MODULE_GLOBALS();
static char pbl_buffer[PAGE_SIZE] __initdata;
static char print_buf[PAGE_SIZE * 2] __initdata;
static const unsigned long exp1[] __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),
BITMAP_FROM_U64(0x00008000),
BITMAP_FROM_U64(0x80000000),
};
static const unsigned long exp2[] __initconst = {
BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0xffffffff77777777ULL),
};
/* Fibonacci sequence */
static const unsigned long exp2_to_exp3_mask[] __initconst = {
BITMAP_FROM_U64(0x008000020020212eULL),
};
/* exp3_0_1 = (exp2[0] & ~exp2_to_exp3_mask) | (exp2[1] & exp2_to_exp3_mask) */
static const unsigned long exp3_0_1[] __initconst = {
BITMAP_FROM_U64(0x33b3333311313137ULL),
};
/* exp3_1_0 = (exp2[1] & ~exp2_to_exp3_mask) | (exp2[0] & exp2_to_exp3_mask) */
static const unsigned long exp3_1_0[] __initconst = {
BITMAP_FROM_U64(0xff7fffff77575751ULL),
};
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;
}
static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
const unsigned int offset,
const unsigned int size,
const unsigned char *const clump_exp,
const unsigned long *const clump)
{
unsigned long exp;
if (offset >= size) {
pr_warn("[%s:%u] bit offset for clump out-of-bounds: expected less than %u, got %u\n",
srcfile, line, size, offset);
return false;
}
exp = clump_exp[offset / 8];
if (!exp) {
pr_warn("[%s:%u] bit offset for zero clump: expected nonzero clump, got bit offset %u with clump value 0",
srcfile, line, offset);
return false;
}
if (*clump != exp) {
pr_warn("[%s:%u] expected clump value of 0x%lX, got clump value of 0x%lX",
srcfile, line, exp, *clump);
return false;
}
return true;
}
static bool __init
__check_eq_str(const char *srcfile, unsigned int line,
const char *exp_str, const char *str,
unsigned int len)
{
bool eq;
eq = strncmp(exp_str, str, len) == 0;
if (!eq)
pr_err("[%s:%u] expected %s, got %s\n", srcfile, line, exp_str, str);
return eq;
}
#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__)
#define expect_eq_clump8(...) __expect_eq(clump8, ##__VA_ARGS__)
#define expect_eq_str(...) __expect_eq(str, ##__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 EXP2_IN_BITS (sizeof(exp2) * 8)
static void __init test_replace(void)
{
unsigned int nbits = 64;
unsigned int nlongs = DIV_ROUND_UP(nbits, BITS_PER_LONG);
DECLARE_BITMAP(bmap, 1024);
BUILD_BUG_ON(EXP2_IN_BITS < nbits * 2);
bitmap_zero(bmap, 1024);
bitmap_replace(bmap, &exp2[0 * nlongs], &exp2[1 * nlongs], exp2_to_exp3_mask, nbits);
expect_eq_bitmap(bmap, exp3_0_1, nbits);
bitmap_zero(bmap, 1024);
bitmap_replace(bmap, &exp2[1 * nlongs], &exp2[0 * nlongs], exp2_to_exp3_mask, nbits);
expect_eq_bitmap(bmap, exp3_1_0, nbits);
bitmap_fill(bmap, 1024);
bitmap_replace(bmap, &exp2[0 * nlongs], &exp2[1 * nlongs], exp2_to_exp3_mask, nbits);
expect_eq_bitmap(bmap, exp3_0_1, nbits);
bitmap_fill(bmap, 1024);
bitmap_replace(bmap, &exp2[1 * nlongs], &exp2[0 * nlongs], exp2_to_exp3_mask, nbits);
expect_eq_bitmap(bmap, exp3_1_0, nbits);
}
#define PARSE_TIME 0x1
#define NO_LEN 0x2
struct test_bitmap_parselist{
const int errno;
const char *in;
const unsigned long *expected;
const int nbits;
const int flags;
};
static const struct test_bitmap_parselist parselist_tests[] __initconst = {
#define step (sizeof(u64) / sizeof(unsigned long))
{0, "0", &exp1[0], 8, 0},
{0, "1", &exp1[1 * step], 8, 0},
{0, "0-15", &exp1[2 * step], 32, 0},
{0, "16-31", &exp1[3 * step], 32, 0},
{0, "0-31:1/2", &exp1[4 * step], 32, 0},
{0, "1-31:1/2", &exp1[5 * step], 32, 0},
{0, "0-31:1/4", &exp1[6 * step], 32, 0},
{0, "1-31:1/4", &exp1[7 * step], 32, 0},
{0, "0-31:4/4", &exp1[8 * step], 32, 0},
{0, "1-31:4/4", &exp1[9 * step], 32, 0},
{0, "0-31:1/4,32-63:2/4", &exp1[10 * step], 64, 0},
{0, "0-31:3/4,32-63:4/4", &exp1[11 * step], 64, 0},
{0, " ,, 0-31:3/4 ,, 32-63:4/4 ,, ", &exp1[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, "", &exp1[12 * step], 8, 0},
{0, "\n", &exp1[12 * step], 8, 0},
{0, ",, ,, , , ,", &exp1[12 * step], 8, 0},
{0, " , ,, , , ", &exp1[12 * step], 8, 0},
{0, " , ,, , , \n", &exp1[12 * step], 8, 0},
{0, "0-0", &exp1[0], 32, 0},
{0, "1-1", &exp1[1 * step], 32, 0},
{0, "15-15", &exp1[13 * step], 32, 0},
{0, "31-31", &exp1[14 * step], 32, 0},
{0, "0-0:0/1", &exp1[12 * step], 32, 0},
{0, "0-0:1/1", &exp1[0], 32, 0},
{0, "0-0:1/31", &exp1[0], 32, 0},
{0, "0-0:31/31", &exp1[0], 32, 0},
{0, "1-1:1/1", &exp1[1 * step], 32, 0},
{0, "0-15:16/31", &exp1[2 * step], 32, 0},
{0, "15-15:1/2", &exp1[13 * step], 32, 0},
{0, "15-15:31/31", &exp1[13 * step], 32, 0},
{0, "15-31:1/31", &exp1[13 * step], 32, 0},
{0, "16-31:16/31", &exp1[3 * step], 32, 0},
{0, "31-31:31/31", &exp1[14 * step], 32, 0},
{0, "N-N", &exp1[14 * step], 32, 0},
{0, "0-0:1/N", &exp1[0], 32, 0},
{0, "0-0:N/N", &exp1[0], 32, 0},
{0, "0-15:16/N", &exp1[2 * step], 32, 0},
{0, "15-15:N/N", &exp1[13 * step], 32, 0},
{0, "15-N:1/N", &exp1[13 * step], 32, 0},
{0, "16-N:16/N", &exp1[3 * step], 32, 0},
{0, "N-N:N/N", &exp1[14 * step], 32, 0},
{0, "0-N:1/3,1-N:1/3,2-N:1/3", &exp1[8 * step], 32, 0},
{0, "0-31:1/3,1-31:1/3,2-31:1/3", &exp1[8 * step], 32, 0},
{0, "1-10:8/12,8-31:24/29,0-31:0/3", &exp1[9 * step], 32, 0},
{0, "all", &exp1[8 * step], 32, 0},
{0, "0, 1, all, ", &exp1[8 * step], 32, 0},
{0, "all:1/2", &exp1[4 * step], 32, 0},
{0, "ALL:1/2", &exp1[4 * step], 32, 0},
{-EINVAL, "al", NULL, 8, 0},
{-EINVAL, "alll", NULL, 8, 0},
{-EINVAL, "-1", NULL, 8, 0},
{-EINVAL, "-0", NULL, 8, 0},
{-EINVAL, "10-1", NULL, 8, 0},
{-ERANGE, "8-8", NULL, 8, 0},
{-ERANGE, "0-31", NULL, 8, 0},
{-EINVAL, "0-31:", NULL, 32, 0},
{-EINVAL, "0-31:0", NULL, 32, 0},
{-EINVAL, "0-31:0/", NULL, 32, 0},
{-EINVAL, "0-31:0/0", NULL, 32, 0},
{-EINVAL, "0-31:1/0", NULL, 32, 0},
{-EINVAL, "0-31:10/1", NULL, 32, 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(void)
{
int i;
int err;
ktime_t time;
DECLARE_BITMAP(bmap, 2048);
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 (err != ptest.errno) {
pr_err("parselist: %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("parselist: %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("parselist: %d: input is '%s' OK, Time: %llu\n",
i, ptest.in, time);
#undef ptest
}
}
static void __init test_bitmap_printlist(void)
{
unsigned long *bmap = kmalloc(PAGE_SIZE, GFP_KERNEL);
char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
char expected[256];
int ret, slen;
ktime_t time;
if (!buf || !bmap)
goto out;
memset(bmap, -1, PAGE_SIZE);
slen = snprintf(expected, 256, "0-%ld", PAGE_SIZE * 8 - 1);
if (slen < 0)
goto out;
time = ktime_get();
ret = bitmap_print_to_pagebuf(true, buf, bmap, PAGE_SIZE * 8);
time = ktime_get() - time;
if (ret != slen + 1) {
pr_err("bitmap_print_to_pagebuf: result is %d, expected %d\n", ret, slen);
goto out;
}
if (strncmp(buf, expected, slen)) {
pr_err("bitmap_print_to_pagebuf: result is %s, expected %s\n", buf, expected);
goto out;
}
pr_err("bitmap_print_to_pagebuf: input is '%s', Time: %llu\n", buf, time);
out:
kfree(buf);
kfree(bmap);
}
static const unsigned long parse_test[] __initconst = {
BITMAP_FROM_U64(0),
BITMAP_FROM_U64(1),
BITMAP_FROM_U64(0xdeadbeef),
BITMAP_FROM_U64(0x100000000ULL),
};
static const unsigned long parse_test2[] __initconst = {
BITMAP_FROM_U64(0x100000000ULL), BITMAP_FROM_U64(0xdeadbeef),
BITMAP_FROM_U64(0x100000000ULL), BITMAP_FROM_U64(0xbaadf00ddeadbeef),
BITMAP_FROM_U64(0x100000000ULL), BITMAP_FROM_U64(0x0badf00ddeadbeef),
};
static const struct test_bitmap_parselist parse_tests[] __initconst = {
{0, "", &parse_test[0 * step], 32, 0},
{0, " ", &parse_test[0 * step], 32, 0},
{0, "0", &parse_test[0 * step], 32, 0},
{0, "0\n", &parse_test[0 * step], 32, 0},
{0, "1", &parse_test[1 * step], 32, 0},
{0, "deadbeef", &parse_test[2 * step], 32, 0},
{0, "1,0", &parse_test[3 * step], 33, 0},
{0, "deadbeef,\n,0,1", &parse_test[2 * step], 96, 0},
{0, "deadbeef,1,0", &parse_test2[0 * 2 * step], 96, 0},
{0, "baadf00d,deadbeef,1,0", &parse_test2[1 * 2 * step], 128, 0},
{0, "badf00d,deadbeef,1,0", &parse_test2[2 * 2 * step], 124, 0},
{0, "badf00d,deadbeef,1,0", &parse_test2[2 * 2 * step], 124, NO_LEN},
{0, " badf00d,deadbeef,1,0 ", &parse_test2[2 * 2 * step], 124, 0},
{0, " , badf00d,deadbeef,1,0 , ", &parse_test2[2 * 2 * step], 124, 0},
{0, " , badf00d, ,, ,,deadbeef,1,0 , ", &parse_test2[2 * 2 * step], 124, 0},
{-EINVAL, "goodfood,deadbeef,1,0", NULL, 128, 0},
{-EOVERFLOW, "3,0", NULL, 33, 0},
{-EOVERFLOW, "123badf00d,deadbeef,1,0", NULL, 128, 0},
{-EOVERFLOW, "badf00d,deadbeef,1,0", NULL, 90, 0},
{-EOVERFLOW, "fbadf00d,deadbeef,1,0", NULL, 95, 0},
{-EOVERFLOW, "badf00d,deadbeef,1,0", NULL, 100, 0},
#undef step
};
static void __init test_bitmap_parse(void)
{
int i;
int err;
ktime_t time;
DECLARE_BITMAP(bmap, 2048);
for (i = 0; i < ARRAY_SIZE(parse_tests); i++) {
struct test_bitmap_parselist test = parse_tests[i];
size_t len = test.flags & NO_LEN ? UINT_MAX : strlen(test.in);
time = ktime_get();
err = bitmap_parse(test.in, len, bmap, test.nbits);
time = ktime_get() - time;
if (err != test.errno) {
pr_err("parse: %d: input is %s, errno is %d, expected %d\n",
i, test.in, err, test.errno);
continue;
}
if (!err && test.expected
&& !__bitmap_equal(bmap, test.expected, test.nbits)) {
pr_err("parse: %d: input is %s, result is 0x%lx, expected 0x%lx\n",
i, test.in, bmap[0],
*test.expected);
continue;
}
if (test.flags & PARSE_TIME)
pr_err("parse: %d: input is '%s' OK, Time: %llu\n",
i, test.in, time);
}
}
#define EXP1_IN_BITS (sizeof(exp1) * 8)
static void __init test_bitmap_arr32(void)
{
unsigned int nbits, next_bit;
u32 arr[EXP1_IN_BITS / 32];
DECLARE_BITMAP(bmap2, EXP1_IN_BITS);
memset(arr, 0xa5, sizeof(arr));
for (nbits = 0; nbits < EXP1_IN_BITS; ++nbits) {
bitmap_to_arr32(arr, exp1, nbits);
bitmap_from_arr32(bmap2, arr, nbits);
expect_eq_bitmap(bmap2, exp1, 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 < EXP1_IN_BITS - 32)
expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
0xa5a5a5a5);
}
}
static void __init test_bitmap_arr64(void)
{
unsigned int nbits, next_bit;
u64 arr[EXP1_IN_BITS / 64];
DECLARE_BITMAP(bmap2, EXP1_IN_BITS);
memset(arr, 0xa5, sizeof(arr));
for (nbits = 0; nbits < EXP1_IN_BITS; ++nbits) {
memset(bmap2, 0xff, sizeof(arr));
bitmap_to_arr64(arr, exp1, nbits);
bitmap_from_arr64(bmap2, arr, nbits);
expect_eq_bitmap(bmap2, exp1, 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_arr64(nbits == %d:"
" tail is not safely cleared: %d\n", nbits, next_bit);
if ((nbits % 64) &&
(arr[(nbits - 1) / 64] & ~GENMASK_ULL((nbits - 1) % 64, 0)))
pr_err("bitmap_to_arr64(nbits == %d): tail is not safely cleared: 0x%016llx (must be 0x%016llx)\n",
nbits, arr[(nbits - 1) / 64],
GENMASK_ULL((nbits - 1) % 64, 0));
if (nbits < EXP1_IN_BITS - 64)
expect_eq_uint(arr[DIV_ROUND_UP(nbits, 64)], 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 const unsigned char clump_exp[] __initconst = {
0x01, /* 1 bit set */
0x02, /* non-edge 1 bit set */
0x00, /* zero bits set */
0x38, /* 3 bits set across 4-bit boundary */
0x38, /* Repeated clump */
0x0F, /* 4 bits set */
0xFF, /* all bits set */
0x05, /* non-adjacent 2 bits set */
};
static void __init test_for_each_set_clump8(void)
{
#define CLUMP_EXP_NUMBITS 64
DECLARE_BITMAP(bits, CLUMP_EXP_NUMBITS);
unsigned int start;
unsigned long clump;
/* set bitmap to test case */
bitmap_zero(bits, CLUMP_EXP_NUMBITS);
bitmap_set(bits, 0, 1); /* 0x01 */
bitmap_set(bits, 9, 1); /* 0x02 */
bitmap_set(bits, 27, 3); /* 0x28 */
bitmap_set(bits, 35, 3); /* 0x28 */
bitmap_set(bits, 40, 4); /* 0x0F */
bitmap_set(bits, 48, 8); /* 0xFF */
bitmap_set(bits, 56, 1); /* 0x05 - part 1 */
bitmap_set(bits, 58, 1); /* 0x05 - part 2 */
for_each_set_clump8(start, clump, bits, CLUMP_EXP_NUMBITS)
expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump);
}
struct test_bitmap_cut {
unsigned int first;
unsigned int cut;
unsigned int nbits;
unsigned long in[4];
unsigned long expected[4];
};
static struct test_bitmap_cut test_cut[] = {
{ 0, 0, 8, { 0x0000000aUL, }, { 0x0000000aUL, }, },
{ 0, 0, 32, { 0xdadadeadUL, }, { 0xdadadeadUL, }, },
{ 0, 3, 8, { 0x000000aaUL, }, { 0x00000015UL, }, },
{ 3, 3, 8, { 0x000000aaUL, }, { 0x00000012UL, }, },
{ 0, 1, 32, { 0xa5a5a5a5UL, }, { 0x52d2d2d2UL, }, },
{ 0, 8, 32, { 0xdeadc0deUL, }, { 0x00deadc0UL, }, },
{ 1, 1, 32, { 0x5a5a5a5aUL, }, { 0x2d2d2d2cUL, }, },
{ 0, 15, 32, { 0xa5a5a5a5UL, }, { 0x00014b4bUL, }, },
{ 0, 16, 32, { 0xa5a5a5a5UL, }, { 0x0000a5a5UL, }, },
{ 15, 15, 32, { 0xa5a5a5a5UL, }, { 0x000125a5UL, }, },
{ 15, 16, 32, { 0xa5a5a5a5UL, }, { 0x0000a5a5UL, }, },
{ 16, 15, 32, { 0xa5a5a5a5UL, }, { 0x0001a5a5UL, }, },
{ BITS_PER_LONG, BITS_PER_LONG, BITS_PER_LONG,
{ 0xa5a5a5a5UL, 0xa5a5a5a5UL, },
{ 0xa5a5a5a5UL, 0xa5a5a5a5UL, },
},
{ 1, BITS_PER_LONG - 1, BITS_PER_LONG,
{ 0xa5a5a5a5UL, 0xa5a5a5a5UL, },
{ 0x00000001UL, 0x00000001UL, },
},
{ 0, BITS_PER_LONG * 2, BITS_PER_LONG * 2 + 1,
{ 0xa5a5a5a5UL, 0x00000001UL, 0x00000001UL, 0x00000001UL },
{ 0x00000001UL, },
},
{ 16, BITS_PER_LONG * 2 + 1, BITS_PER_LONG * 2 + 1 + 16,
{ 0x0000ffffUL, 0x5a5a5a5aUL, 0x5a5a5a5aUL, 0x5a5a5a5aUL },
{ 0x2d2dffffUL, },
},
};
static void __init test_bitmap_cut(void)
{
unsigned long b[5], *in = &b[1], *out = &b[0]; /* Partial overlap */
int i;
for (i = 0; i < ARRAY_SIZE(test_cut); i++) {
struct test_bitmap_cut *t = &test_cut[i];
memcpy(in, t->in, sizeof(t->in));
bitmap_cut(out, in, t->first, t->cut, t->nbits);
expect_eq_bitmap(t->expected, out, t->nbits);
}
}
struct test_bitmap_print {
const unsigned long *bitmap;
unsigned long nbits;
const char *mask;
const char *list;
};
static const unsigned long small_bitmap[] __initconst = {
BITMAP_FROM_U64(0x3333333311111111ULL),
};
static const char small_mask[] __initconst = "33333333,11111111\n";
static const char small_list[] __initconst = "0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61\n";
static const unsigned long large_bitmap[] __initconst = {
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
};
static const char large_mask[] __initconst = "33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111,"
"33333333,11111111,33333333,11111111\n";
static const char large_list[] __initconst = /* more than 4KB */
"0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61,64,68,72,76,80,84,88,92,96-97,100-101,104-1"
"05,108-109,112-113,116-117,120-121,124-125,128,132,136,140,144,148,152,156,160-161,164-165,168-169,172-173,176-1"
"77,180-181,184-185,188-189,192,196,200,204,208,212,216,220,224-225,228-229,232-233,236-237,240-241,244-245,248-2"
"49,252-253,256,260,264,268,272,276,280,284,288-289,292-293,296-297,300-301,304-305,308-309,312-313,316-317,320,3"
"24,328,332,336,340,344,348,352-353,356-357,360-361,364-365,368-369,372-373,376-377,380-381,384,388,392,396,400,4"
"04,408,412,416-417,420-421,424-425,428-429,432-433,436-437,440-441,444-445,448,452,456,460,464,468,472,476,480-4"
"81,484-485,488-489,492-493,496-497,500-501,504-505,508-509,512,516,520,524,528,532,536,540,544-545,548-549,552-5"
"53,556-557,560-561,564-565,568-569,572-573,576,580,584,588,592,596,600,604,608-609,612-613,616-617,620-621,624-6"
"25,628-629,632-633,636-637,640,644,648,652,656,660,664,668,672-673,676-677,680-681,684-685,688-689,692-693,696-6"
"97,700-701,704,708,712,716,720,724,728,732,736-737,740-741,744-745,748-749,752-753,756-757,760-761,764-765,768,7"
"72,776,780,784,788,792,796,800-801,804-805,808-809,812-813,816-817,820-821,824-825,828-829,832,836,840,844,848,8"
"52,856,860,864-865,868-869,872-873,876-877,880-881,884-885,888-889,892-893,896,900,904,908,912,916,920,924,928-9"
"29,932-933,936-937,940-941,944-945,948-949,952-953,956-957,960,964,968,972,976,980,984,988,992-993,996-997,1000-"
"1001,1004-1005,1008-1009,1012-1013,1016-1017,1020-1021,1024,1028,1032,1036,1040,1044,1048,1052,1056-1057,1060-10"
"61,1064-1065,1068-1069,1072-1073,1076-1077,1080-1081,1084-1085,1088,1092,1096,1100,1104,1108,1112,1116,1120-1121"
",1124-1125,1128-1129,1132-1133,1136-1137,1140-1141,1144-1145,1148-1149,1152,1156,1160,1164,1168,1172,1176,1180,1"
"184-1185,1188-1189,1192-1193,1196-1197,1200-1201,1204-1205,1208-1209,1212-1213,1216,1220,1224,1228,1232,1236,124"
"0,1244,1248-1249,1252-1253,1256-1257,1260-1261,1264-1265,1268-1269,1272-1273,1276-1277,1280,1284,1288,1292,1296,"
"1300,1304,1308,1312-1313,1316-1317,1320-1321,1324-1325,1328-1329,1332-1333,1336-1337,1340-1341,1344,1348,1352,13"
"56,1360,1364,1368,1372,1376-1377,1380-1381,1384-1385,1388-1389,1392-1393,1396-1397,1400-1401,1404-1405,1408,1412"
",1416,1420,1424,1428,1432,1436,1440-1441,1444-1445,1448-1449,1452-1453,1456-1457,1460-1461,1464-1465,1468-1469,1"
"472,1476,1480,1484,1488,1492,1496,1500,1504-1505,1508-1509,1512-1513,1516-1517,1520-1521,1524-1525,1528-1529,153"
"2-1533,1536,1540,1544,1548,1552,1556,1560,1564,1568-1569,1572-1573,1576-1577,1580-1581,1584-1585,1588-1589,1592-"
"1593,1596-1597,1600,1604,1608,1612,1616,1620,1624,1628,1632-1633,1636-1637,1640-1641,1644-1645,1648-1649,1652-16"
"53,1656-1657,1660-1661,1664,1668,1672,1676,1680,1684,1688,1692,1696-1697,1700-1701,1704-1705,1708-1709,1712-1713"
",1716-1717,1720-1721,1724-1725,1728,1732,1736,1740,1744,1748,1752,1756,1760-1761,1764-1765,1768-1769,1772-1773,1"
"776-1777,1780-1781,1784-1785,1788-1789,1792,1796,1800,1804,1808,1812,1816,1820,1824-1825,1828-1829,1832-1833,183"
"6-1837,1840-1841,1844-1845,1848-1849,1852-1853,1856,1860,1864,1868,1872,1876,1880,1884,1888-1889,1892-1893,1896-"
"1897,1900-1901,1904-1905,1908-1909,1912-1913,1916-1917,1920,1924,1928,1932,1936,1940,1944,1948,1952-1953,1956-19"
"57,1960-1961,1964-1965,1968-1969,1972-1973,1976-1977,1980-1981,1984,1988,1992,1996,2000,2004,2008,2012,2016-2017"
",2020-2021,2024-2025,2028-2029,2032-2033,2036-2037,2040-2041,2044-2045,2048,2052,2056,2060,2064,2068,2072,2076,2"
"080-2081,2084-2085,2088-2089,2092-2093,2096-2097,2100-2101,2104-2105,2108-2109,2112,2116,2120,2124,2128,2132,213"
"6,2140,2144-2145,2148-2149,2152-2153,2156-2157,2160-2161,2164-2165,2168-2169,2172-2173,2176,2180,2184,2188,2192,"
"2196,2200,2204,2208-2209,2212-2213,2216-2217,2220-2221,2224-2225,2228-2229,2232-2233,2236-2237,2240,2244,2248,22"
"52,2256,2260,2264,2268,2272-2273,2276-2277,2280-2281,2284-2285,2288-2289,2292-2293,2296-2297,2300-2301,2304,2308"
",2312,2316,2320,2324,2328,2332,2336-2337,2340-2341,2344-2345,2348-2349,2352-2353,2356-2357,2360-2361,2364-2365,2"
"368,2372,2376,2380,2384,2388,2392,2396,2400-2401,2404-2405,2408-2409,2412-2413,2416-2417,2420-2421,2424-2425,242"
"8-2429,2432,2436,2440,2444,2448,2452,2456,2460,2464-2465,2468-2469,2472-2473,2476-2477,2480-2481,2484-2485,2488-"
"2489,2492-2493,2496,2500,2504,2508,2512,2516,2520,2524,2528-2529,2532-2533,2536-2537,2540-2541,2544-2545,2548-25"
"49,2552-2553,2556-2557\n";
static const struct test_bitmap_print test_print[] __initconst = {
{ small_bitmap, sizeof(small_bitmap) * BITS_PER_BYTE, small_mask, small_list },
{ large_bitmap, sizeof(large_bitmap) * BITS_PER_BYTE, large_mask, large_list },
};
static void __init test_bitmap_print_buf(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(test_print); i++) {
const struct test_bitmap_print *t = &test_print[i];
int n;
n = bitmap_print_bitmask_to_buf(print_buf, t->bitmap, t->nbits,
0, 2 * PAGE_SIZE);
expect_eq_uint(strlen(t->mask) + 1, n);
expect_eq_str(t->mask, print_buf, n);
n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
0, 2 * PAGE_SIZE);
expect_eq_uint(strlen(t->list) + 1, n);
expect_eq_str(t->list, print_buf, n);
/* test by non-zero offset */
if (strlen(t->list) > PAGE_SIZE) {
n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
PAGE_SIZE, PAGE_SIZE);
expect_eq_uint(strlen(t->list) + 1 - PAGE_SIZE, n);
expect_eq_str(t->list + PAGE_SIZE, print_buf, n);
}
}
}
static void __init test_bitmap_const_eval(void)
{
DECLARE_BITMAP(bitmap, BITS_PER_LONG);
unsigned long initvar = BIT(2);
unsigned long bitopvar = 0;
unsigned long var = 0;
int res;
/*
* Compilers must be able to optimize all of those to compile-time
* constants on any supported optimization level (-O2, -Os) and any
* architecture. Otherwise, trigger a build bug.
* The whole function gets optimized out then, there's nothing to do
* in runtime.
*/
/*
* Equals to `unsigned long bitmap[1] = { GENMASK(6, 5), }`.
* Clang on s390 optimizes bitops at compile-time as intended, but at
* the same time stops treating @bitmap and @bitopvar as compile-time
* constants after regular test_bit() is executed, thus triggering the
* build bugs below. So, call const_test_bit() there directly until
* the compiler is fixed.
*/
bitmap_clear(bitmap, 0, BITS_PER_LONG);
#if defined(__s390__) && defined(__clang__)
if (!const_test_bit(7, bitmap))
#else
if (!test_bit(7, bitmap))
#endif
bitmap_set(bitmap, 5, 2);
/* Equals to `unsigned long bitopvar = BIT(20)` */
__change_bit(31, &bitopvar);
bitmap_shift_right(&bitopvar, &bitopvar, 11, BITS_PER_LONG);
/* Equals to `unsigned long var = BIT(25)` */
var |= BIT(25);
if (var & BIT(0))
var ^= GENMASK(9, 6);
/* __const_hweight<32|64>(GENMASK(6, 5)) == 2 */
res = bitmap_weight(bitmap, 20);
BUILD_BUG_ON(!__builtin_constant_p(res));
BUILD_BUG_ON(res != 2);
/* !(BIT(31) & BIT(18)) == 1 */
res = !test_bit(18, &bitopvar);
BUILD_BUG_ON(!__builtin_constant_p(res));
BUILD_BUG_ON(!res);
/* BIT(2) & GENMASK(14, 8) == 0 */
res = initvar & GENMASK(14, 8);
BUILD_BUG_ON(!__builtin_constant_p(res));
BUILD_BUG_ON(res);
/* ~BIT(25) */
BUILD_BUG_ON(!__builtin_constant_p(~var));
BUILD_BUG_ON(~var != ~BIT(25));
}
static void __init selftest(void)
{
test_zero_clear();
test_fill_set();
test_copy();
test_replace();
test_bitmap_arr32();
test_bitmap_arr64();
test_bitmap_parse();
test_bitmap_parselist();
test_bitmap_printlist();
test_mem_optimisations();
test_for_each_set_clump8();
test_bitmap_cut();
test_bitmap_print_buf();
test_bitmap_const_eval();
}
KSTM_MODULE_LOADERS(test_bitmap);
MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
MODULE_LICENSE("GPL");
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