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unit-test: a bunch of tests for bcache-utils

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This commit is contained in:
Joe Thornber 2018-05-03 20:13:13 +01:00
parent dfc320f5b8
commit ac18164a52
3 changed files with 355 additions and 0 deletions
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1
test/unit/Makefile.in
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@ -12,6 +12,7 @@
UNIT_SOURCE=\
test/unit/bcache_t.c \
test/unit/bcache_utils_t.c \
test/unit/bitset_t.c \
test/unit/config_t.c \
test/unit/dmlist_t.c \

352
test/unit/bcache_utils_t.c Normal file
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@ -0,0 +1,352 @@
/*
* Copyright (C) 2018 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define _GNU_SOURCE
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "bcache.h"
#include "framework.h"
#include "units.h"
//----------------------------------------------------------------
#define T_BLOCK_SIZE 4096
#define NR_BLOCKS 64
#define INIT_PATTERN 123
struct fixture {
int fd;
char fname[32];
struct bcache *cache;
};
static inline uint8_t _pattern_at(uint8_t pat, uint8_t byte)
{
return pat + byte;
}
static uint64_t byte(block_address b, uint64_t offset)
{
return b * T_BLOCK_SIZE + offset;
}
static void *_fix_init(void)
{
uint8_t buffer[T_BLOCK_SIZE];
struct io_engine *engine;
struct fixture *f = malloc(sizeof(*f));
unsigned b, i;
T_ASSERT(f);
snprintf(f->fname, sizeof(f->fname), "unit-test-XXXXXX");
f->fd = mkostemp(f->fname, O_RDWR | O_CREAT | O_EXCL);
T_ASSERT(f->fd >= 0);
for (b = 0; b < NR_BLOCKS; b++) {
for (i = 0; i < sizeof(buffer); i++)
buffer[i] = _pattern_at(INIT_PATTERN, byte(b, i));
T_ASSERT(write(f->fd, buffer, T_BLOCK_SIZE) > 0);
}
close(f->fd);
// reopen with O_DIRECT
f->fd = open(f->fname, O_RDWR | O_DIRECT);
T_ASSERT(f->fd >= 0);
engine = create_async_io_engine();
T_ASSERT(engine);
f->cache = bcache_create(T_BLOCK_SIZE / 512, NR_BLOCKS, engine);
T_ASSERT(f->cache);
return f;
}
static void _fix_exit(void *fixture)
{
struct fixture *f = fixture;
bcache_destroy(f->cache);
close(f->fd);
unlink(f->fname);
free(f);
}
//----------------------------------------------------------------
static void _verify_bytes(struct block *b, uint64_t base,
uint64_t offset, uint64_t len, uint8_t pat)
{
unsigned i;
for (i = 0; i < len; i++)
T_ASSERT_EQUAL(((uint8_t *) b->data)[offset + i], _pattern_at(pat, base + offset + i));
}
static void _zero_bytes(struct block *b, uint64_t offset, uint64_t len)
{
memset(((uint8_t *) b->data) + offset, 0, len);
}
static uint64_t _min(uint64_t lhs, uint64_t rhs)
{
return rhs < lhs ? rhs : lhs;
}
static void _verify(struct fixture *f, uint64_t byte_b, uint64_t byte_e, uint8_t pat)
{
int err;
struct block *b;
block_address bb = byte_b / T_BLOCK_SIZE;
block_address be = (byte_e + T_BLOCK_SIZE - 1) / T_BLOCK_SIZE;
uint64_t offset = byte_b % T_BLOCK_SIZE;
uint64_t blen, len = byte_e - byte_b;
// Verify via bcache_read_bytes
{
unsigned i;
size_t len2 = byte_e - byte_b;
uint8_t *buffer = malloc(len2);
T_ASSERT(bcache_read_bytes(f->cache, f->fd, byte_b, len2, buffer));
for (i = 0; i < len; i++)
T_ASSERT_EQUAL(buffer[i], _pattern_at(pat, byte_b + i));
}
// Verify again, driving bcache directly
for (; bb != be; bb++) {
T_ASSERT(bcache_get(f->cache, f->fd, bb, 0, &b, &err));
blen = _min(T_BLOCK_SIZE - offset, len);
_verify_bytes(b, bb * T_BLOCK_SIZE, offset, blen, pat);
offset = 0;
len -= blen;
bcache_put(b);
}
}
static void _verify_zeroes(struct fixture *f, uint64_t byte_b, uint64_t byte_e)
{
int err;
unsigned i;
struct block *b;
block_address bb = byte_b / T_BLOCK_SIZE;
block_address be = (byte_e + T_BLOCK_SIZE - 1) / T_BLOCK_SIZE;
uint64_t offset = byte_b % T_BLOCK_SIZE;
uint64_t blen, len = byte_e - byte_b;
for (; bb != be; bb++) {
T_ASSERT(bcache_get(f->cache, f->fd, bb, 0, &b, &err));
blen = _min(T_BLOCK_SIZE - offset, len);
for (i = 0; i < blen; i++)
T_ASSERT(((uint8_t *) b->data)[offset + i] == 0);
offset = 0;
len -= blen;
bcache_put(b);
}
}
static void _do_write(struct fixture *f, uint64_t byte_b, uint64_t byte_e, uint8_t pat)
{
unsigned i;
size_t len = byte_e - byte_b;
uint8_t *buffer = malloc(len);
T_ASSERT(buffer);
for (i = 0; i < len; i++)
buffer[i] = _pattern_at(pat, byte_b + i);
T_ASSERT(bcache_write_bytes(f->cache, f->fd, byte_b, i, buffer));
free(buffer);
}
static void _do_zero(struct fixture *f, uint64_t byte_b, uint64_t byte_e)
{
int err;
struct block *b;
block_address bb = byte_b / T_BLOCK_SIZE;
block_address be = (byte_e + T_BLOCK_SIZE - 1) / T_BLOCK_SIZE;
uint64_t offset = byte_b % T_BLOCK_SIZE;
uint64_t blen, len = byte_e - byte_b;
for (; bb != be; bb++) {
T_ASSERT(bcache_get(f->cache, f->fd, bb, GF_DIRTY, &b, &err));
blen = _min(T_BLOCK_SIZE - offset, len);
_zero_bytes(b, offset, blen);
offset = 0;
len -= blen;
bcache_put(b);
}
}
static void _reopen(struct fixture *f)
{
struct io_engine *engine;
bcache_destroy(f->cache);
engine = create_async_io_engine();
T_ASSERT(engine);
f->cache = bcache_create(T_BLOCK_SIZE / 512, NR_BLOCKS, engine);
T_ASSERT(f->cache);
}
//----------------------------------------------------------------
static uint8_t _random_pattern(void)
{
return random();
}
static uint64_t _max_byte(void)
{
return T_BLOCK_SIZE * NR_BLOCKS;
}
static void _rwv_cycle(struct fixture *f, uint64_t b, uint64_t e)
{
uint8_t pat = _random_pattern();
_verify(f, b, e, INIT_PATTERN);
_do_write(f, b, e, pat);
_reopen(f);
_verify(f, b < 128 ? 0 : b - 128, b, INIT_PATTERN);
_verify(f, b, e, pat);
_verify(f, e, _min(e + 128, _max_byte()), INIT_PATTERN);
}
static void _test_rw_first_block(void *fixture)
{
_rwv_cycle(fixture, byte(0, 0), byte(0, T_BLOCK_SIZE));
}
static void _test_rw_last_block(void *fixture)
{
uint64_t last_block = NR_BLOCKS - 1;
_rwv_cycle(fixture, byte(last_block, 0),
byte(last_block, T_BLOCK_SIZE));
}
static void _test_rw_several_whole_blocks(void *fixture)
{
_rwv_cycle(fixture, byte(5, 0), byte(10, 0));
}
static void _test_rw_within_single_block(void *fixture)
{
_rwv_cycle(fixture, byte(7, 3), byte(7, T_BLOCK_SIZE / 2));
}
static void _test_rw_cross_one_boundary(void *fixture)
{
_rwv_cycle(fixture, byte(13, 43), byte(14, 43));
}
static void _test_rw_many_boundaries(void *fixture)
{
_rwv_cycle(fixture, byte(13, 13), byte(23, 13));
}
//----------------------------------------------------------------
static void _zero_cycle(struct fixture *f, uint64_t b, uint64_t e)
{
_verify(f, b, e, INIT_PATTERN);
_do_zero(f, b, e);
_reopen(f);
_verify(f, b < 128 ? 0 : b - 128, b, INIT_PATTERN);
_verify_zeroes(f, b, e);
_verify(f, e, _min(e + 128, _max_byte()), INIT_PATTERN);
}
static void _test_zero_first_block(void *fixture)
{
_zero_cycle(fixture, byte(0, 0), byte(0, T_BLOCK_SIZE));
}
static void _test_zero_last_block(void *fixture)
{
uint64_t last_block = NR_BLOCKS - 1;
_zero_cycle(fixture, byte(last_block, 0), byte(last_block, T_BLOCK_SIZE));
}
static void _test_zero_several_whole_blocks(void *fixture)
{
_zero_cycle(fixture, byte(5, 0), byte(10, 0));
}
static void _test_zero_within_single_block(void *fixture)
{
_zero_cycle(fixture, byte(7, 3), byte(7, T_BLOCK_SIZE / 2));
}
static void _test_zero_cross_one_boundary(void *fixture)
{
_zero_cycle(fixture, byte(13, 43), byte(14, 43));
}
static void _test_zero_many_boundaries(void *fixture)
{
_zero_cycle(fixture, byte(13, 13), byte(23, 13));
}
//----------------------------------------------------------------
#define T(path, desc, fn) register_test(ts, "/base/device/bcache/utils/" path, desc, fn)
static struct test_suite *_tests(void)
{
struct test_suite *ts = test_suite_create(_fix_init, _fix_exit);
if (!ts) {
fprintf(stderr, "out of memory\n");
exit(1);
}
T("rw-first-block", "read/write/verify the first block", _test_rw_first_block);
T("rw-last-block", "read/write/verify the last block", _test_rw_last_block);
T("rw-several-blocks", "read/write/verify several whole blocks", _test_rw_several_whole_blocks);
T("rw-within-single-block", "read/write/verify within single block", _test_rw_within_single_block);
T("rw-cross-one-boundary", "read/write/verify across one boundary", _test_rw_cross_one_boundary);
T("rw-many-boundaries", "read/write/verify many boundaries", _test_rw_many_boundaries);
T("zero-first-block", "zero the first block", _test_zero_first_block);
T("zero-last-block", "zero the last block", _test_zero_last_block);
T("zero-several-blocks", "zero several whole blocks", _test_zero_several_whole_blocks);
T("zero-within-single-block", "zero within single block", _test_zero_within_single_block);
T("zero-cross-one-boundary", "zero across one boundary", _test_zero_cross_one_boundary);
T("zero-many-boundaries", "zero many boundaries", _test_zero_many_boundaries);
return ts;
}
void bcache_utils_tests(struct dm_list *all_tests)
{
dm_list_add(all_tests, &_tests()->list);
}

2
test/unit/units.h
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@ -21,6 +21,7 @@
// Declare the function that adds tests suites here ...
void bcache_tests(struct dm_list *suites);
void bcache_utils_tests(struct dm_list *suites);
void bitset_tests(struct dm_list *suites);
void config_tests(struct dm_list *suites);
void dm_list_tests(struct dm_list *suites);
@ -34,6 +35,7 @@ void string_tests(struct dm_list *suites);
static inline void register_all_tests(struct dm_list *suites)
{
bcache_tests(suites);
bcache_utils_tests(suites);
bitset_tests(suites);
config_tests(suites);
dm_list_tests(suites);