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/*
* 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
*/
#include "units.h"
#include "lib/device/bcache.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
//----------------------------------------------------------------
#define SECTOR_SIZE 512
#define BLOCK_SIZE_SECTORS 8
#define NR_BLOCKS 64
struct fixture {
struct io_engine *e;
uint8_t *data;
char fname[64];
int fd;
};
static void _fill_buffer(uint8_t *buffer, uint8_t seed, size_t count)
{
unsigned i;
uint8_t b = seed;
for (i = 0; i < count; i++) {
buffer[i] = b;
b = ((b << 5) + b) + i;
}
}
static void _check_buffer(uint8_t *buffer, uint8_t seed, size_t count)
{
unsigned i;
uint8_t b = seed;
for (i = 0; i < count; i++) {
T_ASSERT_EQUAL(buffer[i], b);
b = ((b << 5) + b) + i;
}
}
static void _print_buffer(const char *name, uint8_t *buffer, size_t count)
{
unsigned col;
fprintf(stderr, "%s:\n", name);
while (count) {
for (col = 0; count && col < 20; col++) {
fprintf(stderr, "%x, ", (unsigned) *buffer);
col++;
buffer++;
count--;
}
fprintf(stderr, "\n");
}
}
static void *_fix_init(void)
{
struct fixture *f = malloc(sizeof(*f));
T_ASSERT(f);
f->e = create_async_io_engine();
T_ASSERT(f->e);
if (posix_memalign((void **) &f->data, 4096, SECTOR_SIZE * BLOCK_SIZE_SECTORS))
test_fail("posix_memalign failed");
snprintf(f->fname, sizeof(f->fname), "unit-test-XXXXXX");
f->fd = mkstemp(f->fname);
T_ASSERT(f->fd >= 0);
_fill_buffer(f->data, 123, SECTOR_SIZE * BLOCK_SIZE_SECTORS);
T_ASSERT(write(f->fd, f->data, SECTOR_SIZE * BLOCK_SIZE_SECTORS) > 0);
T_ASSERT(lseek(f->fd, 0, SEEK_SET) != -1);
return f;
}
static void _fix_exit(void *fixture)
{
struct fixture *f = fixture;
close(f->fd);
unlink(f->fname);
free(f->data);
if (f->e)
f->e->destroy(f->e);
free(f);
}
static void _test_create(void *fixture)
{
// empty
}
struct io {
bool completed;
int error;
};
static void _io_init(struct io *io)
{
io->completed = false;
io->error = 0;
}
static void _complete_io(void *context, int io_error)
{
struct io *io = context;
io->completed = true;
io->error = io_error;
}
static void _test_read(void *fixture)
{
struct fixture *f = fixture;
struct io io;
_io_init(&io);
T_ASSERT(f->e->issue(f->e, DIR_READ, f->fd, 0, BLOCK_SIZE_SECTORS, f->data, &io));
T_ASSERT(f->e->wait(f->e, _complete_io));
T_ASSERT(io.completed);
T_ASSERT(!io.error);
_check_buffer(f->data, 123, sizeof(f->data));
}
static void _test_write(void *fixture)
{
struct fixture *f = fixture;
struct io io;
_io_init(&io);
T_ASSERT(f->e->issue(f->e, DIR_WRITE, f->fd, 0, BLOCK_SIZE_SECTORS, f->data, &io));
T_ASSERT(f->e->wait(f->e, _complete_io));
T_ASSERT(io.completed);
T_ASSERT(!io.error);
}
static void _test_write_bytes(void *fixture)
{
struct fixture *f = fixture;
unsigned offset = 345;
char buf_out[32];
char buf_in[32];
struct bcache *cache = bcache_create(8, BLOCK_SIZE_SECTORS, f->e);
T_ASSERT(cache);
// T_ASSERT(bcache_read_bytes(cache, f->fd, offset, sizeof(buf_in), buf_in));
_fill_buffer((uint8_t *) buf_out, 234, sizeof(buf_out));
T_ASSERT(bcache_write_bytes(cache, f->fd, offset, sizeof(buf_out), buf_out));
T_ASSERT(bcache_read_bytes(cache, f->fd, offset, sizeof(buf_in), buf_in));
_print_buffer("buf_out", (uint8_t *) buf_out, sizeof(buf_out));
_print_buffer("buf_in", (uint8_t *) buf_in, sizeof(buf_in));
T_ASSERT(!memcmp(buf_out, buf_in, sizeof(buf_out)));
bcache_destroy(cache);
f->e = NULL; // already destroyed
}
//----------------------------------------------------------------
#define T(path, desc, fn) register_test(ts, "/base/device/bcache/io-engine/" 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("create-destroy", "simple create/destroy", _test_create);
T("read", "read sanity check", _test_read);
T("write", "write sanity check", _test_write);
T("bcache-write-bytes", "test the utility fns", _test_write_bytes);
return ts;
}
void io_engine_tests(struct dm_list *all_tests)
{
dm_list_add(all_tests, &_tests()->list);
}
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