test_bitmap: unit tests for lib/bitmap.c
This is mainly testing bitmap construction and conversion to/from u32[] for now. Tested: qemu i386, x86_64, ppc, ppc64 BE and LE, ARM. Signed-off-by: David Decotigny <decot@googlers.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Decotigny
David S. Miller
parent
e52bc7c28a
commit
5fd003f56c
5 changed files with 378 additions and 1 deletions
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@ -1738,6 +1738,14 @@ config TEST_KSTRTOX
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config TEST_PRINTF
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tristate "Test printf() family of functions at runtime"
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config TEST_BITMAP
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tristate "Test bitmap_*() family of functions at runtime"
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default n
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help
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Enable this option to test the bitmap functions at boot.
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If unsure, say N.
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config TEST_RHASHTABLE
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tristate "Perform selftest on resizable hash table"
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default n
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@ -43,6 +43,7 @@ obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o
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obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o
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obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o
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obj-$(CONFIG_TEST_PRINTF) += test_printf.o
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obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o
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ifeq ($(CONFIG_DEBUG_KOBJECT),y)
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CFLAGS_kobject.o += -DDEBUG
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358
lib/test_bitmap.c
Normal file
358
lib/test_bitmap.c
Normal file
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@ -0,0 +1,358 @@
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/*
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* Test cases for printf facility.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/bitmap.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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static unsigned total_tests __initdata;
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static unsigned failed_tests __initdata;
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static char pbl_buffer[PAGE_SIZE] __initdata;
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static bool __init
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__check_eq_uint(const char *srcfile, unsigned int line,
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const unsigned int exp_uint, unsigned int x)
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{
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if (exp_uint != x) {
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pr_warn("[%s:%u] expected %u, got %u\n",
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srcfile, line, exp_uint, x);
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return false;
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}
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return true;
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}
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static bool __init
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__check_eq_bitmap(const char *srcfile, unsigned int line,
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const unsigned long *exp_bmap, unsigned int exp_nbits,
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const unsigned long *bmap, unsigned int nbits)
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{
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if (exp_nbits != nbits) {
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pr_warn("[%s:%u] bitmap length mismatch: expected %u, got %u\n",
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srcfile, line, exp_nbits, nbits);
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return false;
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}
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if (!bitmap_equal(exp_bmap, bmap, nbits)) {
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pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
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srcfile, line,
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exp_nbits, exp_bmap, nbits, bmap);
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return false;
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}
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return true;
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}
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static bool __init
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__check_eq_pbl(const char *srcfile, unsigned int line,
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const char *expected_pbl,
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const unsigned long *bitmap, unsigned int nbits)
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{
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snprintf(pbl_buffer, sizeof(pbl_buffer), "%*pbl", nbits, bitmap);
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if (strcmp(expected_pbl, pbl_buffer)) {
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pr_warn("[%s:%u] expected \"%s\", got \"%s\"\n",
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srcfile, line,
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expected_pbl, pbl_buffer);
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return false;
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}
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return true;
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}
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static bool __init
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__check_eq_u32_array(const char *srcfile, unsigned int line,
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const u32 *exp_arr, unsigned int exp_len,
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const u32 *arr, unsigned int len)
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{
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if (exp_len != len) {
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pr_warn("[%s:%u] array length differ: expected %u, got %u\n",
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srcfile, line,
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exp_len, len);
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return false;
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}
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if (memcmp(exp_arr, arr, len*sizeof(*arr))) {
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pr_warn("[%s:%u] array contents differ\n", srcfile, line);
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print_hex_dump(KERN_WARNING, " exp: ", DUMP_PREFIX_OFFSET,
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32, 4, exp_arr, exp_len*sizeof(*exp_arr), false);
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print_hex_dump(KERN_WARNING, " got: ", DUMP_PREFIX_OFFSET,
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32, 4, arr, len*sizeof(*arr), false);
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return false;
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}
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return true;
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}
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#define __expect_eq(suffix, ...) \
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({ \
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int result = 0; \
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total_tests++; \
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if (!__check_eq_ ## suffix(__FILE__, __LINE__, \
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##__VA_ARGS__)) { \
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failed_tests++; \
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result = 1; \
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} \
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result; \
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})
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#define expect_eq_uint(...) __expect_eq(uint, ##__VA_ARGS__)
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#define expect_eq_bitmap(...) __expect_eq(bitmap, ##__VA_ARGS__)
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#define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__)
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#define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__)
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static void __init test_zero_fill_copy(void)
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{
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DECLARE_BITMAP(bmap1, 1024);
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DECLARE_BITMAP(bmap2, 1024);
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bitmap_zero(bmap1, 1024);
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bitmap_zero(bmap2, 1024);
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/* single-word bitmaps */
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expect_eq_pbl("", bmap1, 23);
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bitmap_fill(bmap1, 19);
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expect_eq_pbl("0-18", bmap1, 1024);
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bitmap_copy(bmap2, bmap1, 23);
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expect_eq_pbl("0-18", bmap2, 1024);
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bitmap_fill(bmap2, 23);
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expect_eq_pbl("0-22", bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 23);
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expect_eq_pbl("0-18", bmap2, 1024);
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bitmap_zero(bmap1, 23);
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expect_eq_pbl("", bmap1, 1024);
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/* multi-word bitmaps */
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bitmap_zero(bmap1, 1024);
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expect_eq_pbl("", bmap1, 1024);
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bitmap_fill(bmap1, 109);
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expect_eq_pbl("0-108", bmap1, 1024);
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bitmap_copy(bmap2, bmap1, 1024);
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expect_eq_pbl("0-108", bmap2, 1024);
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bitmap_fill(bmap2, 1024);
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expect_eq_pbl("0-1023", bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 1024);
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expect_eq_pbl("0-108", bmap2, 1024);
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/* the following tests assume a 32- or 64-bit arch (even 128b
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* if we care)
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*/
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bitmap_fill(bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 109); /* ... but 0-padded til word length */
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expect_eq_pbl("0-108,128-1023", bmap2, 1024);
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bitmap_fill(bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 97); /* ... but aligned on word length */
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expect_eq_pbl("0-108,128-1023", bmap2, 1024);
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bitmap_zero(bmap2, 97); /* ... but 0-padded til word length */
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expect_eq_pbl("128-1023", bmap2, 1024);
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}
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static void __init test_bitmap_u32_array_conversions(void)
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{
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DECLARE_BITMAP(bmap1, 1024);
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DECLARE_BITMAP(bmap2, 1024);
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u32 exp_arr[32], arr[32];
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unsigned nbits;
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for (nbits = 0 ; nbits < 257 ; ++nbits) {
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const unsigned int used_u32s = DIV_ROUND_UP(nbits, 32);
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unsigned int i, rv;
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bitmap_zero(bmap1, nbits);
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bitmap_set(bmap1, nbits, 1024 - nbits); /* garbage */
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
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expect_eq_uint(nbits, rv);
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memset(exp_arr, 0xff, sizeof(exp_arr));
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memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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bitmap_fill(bmap2, 1024);
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rv = bitmap_from_u32array(bmap2, nbits, arr, used_u32s);
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expect_eq_uint(nbits, rv);
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expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
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for (i = 0 ; i < nbits ; ++i) {
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/*
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* test conversion bitmap -> u32[]
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*/
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bitmap_zero(bmap1, 1024);
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__set_bit(i, bmap1);
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bitmap_set(bmap1, nbits, 1024 - nbits); /* garbage */
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
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expect_eq_uint(nbits, rv);
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/* 1st used u32 words contain expected bit set, the
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* remaining words are left unchanged (0xff)
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*/
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memset(exp_arr, 0xff, sizeof(exp_arr));
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memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
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exp_arr[i/32] = (1U<<(i%32));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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/* same, with longer array to fill
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*/
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, 32, bmap1, nbits);
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expect_eq_uint(nbits, rv);
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/* 1st used u32 words contain expected bit set, the
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* remaining words are all 0s
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*/
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memset(exp_arr, 0, sizeof(exp_arr));
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exp_arr[i/32] = (1U<<(i%32));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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/*
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* test conversion u32[] -> bitmap
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*/
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/* the 1st nbits of bmap2 are identical to
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* bmap1, the remaining bits of bmap2 are left
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* unchanged (all 1s)
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*/
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bitmap_fill(bmap2, 1024);
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rv = bitmap_from_u32array(bmap2, nbits,
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exp_arr, used_u32s);
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expect_eq_uint(nbits, rv);
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expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
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/* same, with more bits to fill
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*/
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memset(arr, 0xff, sizeof(arr)); /* garbage */
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memset(arr, 0, used_u32s*sizeof(u32));
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arr[i/32] = (1U<<(i%32));
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bitmap_fill(bmap2, 1024);
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rv = bitmap_from_u32array(bmap2, 1024, arr, used_u32s);
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expect_eq_uint(used_u32s*32, rv);
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/* the 1st nbits of bmap2 are identical to
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* bmap1, the remaining bits of bmap2 are cleared
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*/
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bitmap_zero(bmap1, 1024);
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__set_bit(i, bmap1);
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expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
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/*
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* test short conversion bitmap -> u32[] (1
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* word too short)
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*/
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if (used_u32s > 1) {
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bitmap_zero(bmap1, 1024);
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__set_bit(i, bmap1);
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bitmap_set(bmap1, nbits,
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1024 - nbits); /* garbage */
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memset(arr, 0xff, sizeof(arr));
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rv = bitmap_to_u32array(arr, used_u32s - 1,
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bmap1, nbits);
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expect_eq_uint((used_u32s - 1)*32, rv);
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/* 1st used u32 words contain expected
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* bit set, the remaining words are
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* left unchanged (0xff)
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*/
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memset(exp_arr, 0xff, sizeof(exp_arr));
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memset(exp_arr, 0,
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(used_u32s-1)*sizeof(*exp_arr));
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if ((i/32) < (used_u32s - 1))
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exp_arr[i/32] = (1U<<(i%32));
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expect_eq_u32_array(exp_arr, 32, arr, 32);
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}
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/*
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* test short conversion u32[] -> bitmap (3
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* bits too short)
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*/
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if (nbits > 3) {
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memset(arr, 0xff, sizeof(arr)); /* garbage */
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memset(arr, 0, used_u32s*sizeof(*arr));
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arr[i/32] = (1U<<(i%32));
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bitmap_zero(bmap1, 1024);
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rv = bitmap_from_u32array(bmap1, nbits - 3,
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arr, used_u32s);
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expect_eq_uint(nbits - 3, rv);
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/* we are expecting the bit < nbits -
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* 3 (none otherwise), and the rest of
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* bmap1 unchanged (0-filled)
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*/
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bitmap_zero(bmap2, 1024);
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if (i < nbits - 3)
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__set_bit(i, bmap2);
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expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
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/* do the same with bmap1 initially
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* 1-filled
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*/
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bitmap_fill(bmap1, 1024);
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rv = bitmap_from_u32array(bmap1, nbits - 3,
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arr, used_u32s);
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expect_eq_uint(nbits - 3, rv);
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/* we are expecting the bit < nbits -
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* 3 (none otherwise), and the rest of
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* bmap1 unchanged (1-filled)
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*/
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bitmap_zero(bmap2, 1024);
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if (i < nbits - 3)
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__set_bit(i, bmap2);
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bitmap_set(bmap2, nbits-3, 1024 - nbits + 3);
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expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
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}
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}
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}
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}
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static int __init test_bitmap_init(void)
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{
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test_zero_fill_copy();
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test_bitmap_u32_array_conversions();
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if (failed_tests == 0)
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pr_info("all %u tests passed\n", total_tests);
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else
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pr_warn("failed %u out of %u tests\n",
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failed_tests, total_tests);
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return failed_tests ? -EINVAL : 0;
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}
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static void __exit test_bitmap_cleanup(void)
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{
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}
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module_init(test_bitmap_init);
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module_exit(test_bitmap_cleanup);
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MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
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MODULE_LICENSE("GPL");
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@ -3,6 +3,6 @@
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# No binaries, but make sure arg-less "make" doesn't trigger "run_tests"
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all:
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TEST_PROGS := printf.sh
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TEST_PROGS := printf.sh bitmap.sh
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include ../lib.mk
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10
tools/testing/selftests/lib/bitmap.sh
Executable file
10
tools/testing/selftests/lib/bitmap.sh
Executable file
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@ -0,0 +1,10 @@
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#!/bin/sh
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# Runs bitmap infrastructure tests using test_bitmap kernel module
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if /sbin/modprobe -q test_bitmap; then
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/sbin/modprobe -q -r test_bitmap
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echo "bitmap: ok"
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else
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echo "bitmap: [FAIL]"
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exit 1
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fi
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