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qemu/tests/test-replication.c

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/*
* Block replication tests
*
* Copyright (c) 2016 FUJITSU LIMITED
* Author: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
#include "qemu/option.h"
#include "qemu/main-loop.h"
#include "replication.h"
#include "block/block_int.h"
#include "block/qdict.h"
#include "sysemu/block-backend.h"
#define IMG_SIZE (64 * 1024 * 1024)
/* primary */
#define P_ID "primary-id"
static char p_local_disk[] = "/tmp/p_local_disk.XXXXXX";
/* secondary */
#define S_ID "secondary-id"
#define S_LOCAL_DISK_ID "secondary-local-disk-id"
static char s_local_disk[] = "/tmp/s_local_disk.XXXXXX";
static char s_active_disk[] = "/tmp/s_active_disk.XXXXXX";
static char s_hidden_disk[] = "/tmp/s_hidden_disk.XXXXXX";
/* FIXME: steal from blockdev.c */
QemuOptsList qemu_drive_opts = {
.name = "drive",
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
.desc = {
{ /* end of list */ }
},
};
#define NOT_DONE 0x7fffffff
static void blk_rw_done(void *opaque, int ret)
{
*(int *)opaque = ret;
}
static void test_blk_read(BlockBackend *blk, long pattern,
int64_t pattern_offset, int64_t pattern_count,
int64_t offset, int64_t count,
bool expect_failed)
{
void *pattern_buf = NULL;
QEMUIOVector qiov;
void *cmp_buf = NULL;
int async_ret = NOT_DONE;
if (pattern) {
cmp_buf = g_malloc(pattern_count);
memset(cmp_buf, pattern, pattern_count);
}
pattern_buf = g_malloc(count);
if (pattern) {
memset(pattern_buf, pattern, count);
} else {
memset(pattern_buf, 0x00, count);
}
qemu_iovec_init(&qiov, 1);
qemu_iovec_add(&qiov, pattern_buf, count);
blk_aio_preadv(blk, offset, &qiov, 0, blk_rw_done, &async_ret);
while (async_ret == NOT_DONE) {
main_loop_wait(false);
}
if (expect_failed) {
g_assert(async_ret != 0);
} else {
g_assert(async_ret == 0);
if (pattern) {
g_assert(memcmp(pattern_buf + pattern_offset,
cmp_buf, pattern_count) <= 0);
}
}
g_free(pattern_buf);
g_free(cmp_buf);
qemu_iovec_destroy(&qiov);
}
static void test_blk_write(BlockBackend *blk, long pattern, int64_t offset,
int64_t count, bool expect_failed)
{
void *pattern_buf = NULL;
QEMUIOVector qiov;
int async_ret = NOT_DONE;
pattern_buf = g_malloc(count);
if (pattern) {
memset(pattern_buf, pattern, count);
} else {
memset(pattern_buf, 0x00, count);
}
qemu_iovec_init(&qiov, 1);
qemu_iovec_add(&qiov, pattern_buf, count);
blk_aio_pwritev(blk, offset, &qiov, 0, blk_rw_done, &async_ret);
while (async_ret == NOT_DONE) {
main_loop_wait(false);
}
if (expect_failed) {
g_assert(async_ret != 0);
} else {
g_assert(async_ret == 0);
}
g_free(pattern_buf);
qemu_iovec_destroy(&qiov);
}
/*
* Create a uniquely-named empty temporary file.
*/
static void make_temp(char *template)
{
int fd;
fd = mkstemp(template);
g_assert(fd >= 0);
close(fd);
}
static void prepare_imgs(void)
{
Error *local_err = NULL;
make_temp(p_local_disk);
make_temp(s_local_disk);
make_temp(s_active_disk);
make_temp(s_hidden_disk);
/* Primary */
bdrv_img_create(p_local_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
BDRV_O_RDWR, true, &local_err);
g_assert(!local_err);
/* Secondary */
bdrv_img_create(s_local_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
BDRV_O_RDWR, true, &local_err);
g_assert(!local_err);
bdrv_img_create(s_active_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
BDRV_O_RDWR, true, &local_err);
g_assert(!local_err);
bdrv_img_create(s_hidden_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
BDRV_O_RDWR, true, &local_err);
g_assert(!local_err);
}
static void cleanup_imgs(void)
{
/* Primary */
unlink(p_local_disk);
/* Secondary */
unlink(s_local_disk);
unlink(s_active_disk);
unlink(s_hidden_disk);
}
static BlockBackend *start_primary(void)
{
BlockBackend *blk;
QemuOpts *opts;
QDict *qdict;
Error *local_err = NULL;
char *cmdline;
cmdline = g_strdup_printf("driver=replication,mode=primary,node-name=xxx,"
"file.driver=qcow2,file.file.filename=%s,"
"file.file.locking=off"
, p_local_disk);
opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false);
g_free(cmdline);
qdict = qemu_opts_to_qdict(opts, NULL);
qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
blk = blk_new_open(NULL, NULL, qdict, BDRV_O_RDWR, &local_err);
g_assert(blk);
g_assert(!local_err);
monitor_add_blk(blk, P_ID, &local_err);
g_assert(!local_err);
qemu_opts_del(opts);
return blk;
}
static void teardown_primary(void)
{
BlockBackend *blk;
AioContext *ctx;
/* remove P_ID */
blk = blk_by_name(P_ID);
assert(blk);
ctx = blk_get_aio_context(blk);
aio_context_acquire(ctx);
monitor_remove_blk(blk);
blk_unref(blk);
aio_context_release(ctx);
}
static void test_primary_read(void)
{
BlockBackend *blk;
blk = start_primary();
/* read from 0 to IMG_SIZE */
test_blk_read(blk, 0, 0, IMG_SIZE, 0, IMG_SIZE, true);
teardown_primary();
}
static void test_primary_write(void)
{
BlockBackend *blk;
blk = start_primary();
/* write from 0 to IMG_SIZE */
test_blk_write(blk, 0, 0, IMG_SIZE, true);
teardown_primary();
}
static void test_primary_start(void)
{
BlockBackend *blk = NULL;
Error *local_err = NULL;
blk = start_primary();
replication_start_all(REPLICATION_MODE_PRIMARY, &local_err);
g_assert(!local_err);
/* read from 0 to IMG_SIZE */
test_blk_read(blk, 0, 0, IMG_SIZE, 0, IMG_SIZE, true);
/* write 0x22 from 0 to IMG_SIZE */
test_blk_write(blk, 0x22, 0, IMG_SIZE, false);
teardown_primary();
}
static void test_primary_stop(void)
{
Error *local_err = NULL;
bool failover = true;
start_primary();
replication_start_all(REPLICATION_MODE_PRIMARY, &local_err);
g_assert(!local_err);
replication_stop_all(failover, &local_err);
g_assert(!local_err);
teardown_primary();
}
static void test_primary_do_checkpoint(void)
{
Error *local_err = NULL;
start_primary();
replication_start_all(REPLICATION_MODE_PRIMARY, &local_err);
g_assert(!local_err);
replication_do_checkpoint_all(&local_err);
g_assert(!local_err);
teardown_primary();
}
static void test_primary_get_error_all(void)
{
Error *local_err = NULL;
start_primary();
replication_start_all(REPLICATION_MODE_PRIMARY, &local_err);
g_assert(!local_err);
replication_get_error_all(&local_err);
g_assert(!local_err);
teardown_primary();
}
static BlockBackend *start_secondary(void)
{
QemuOpts *opts;
QDict *qdict;
BlockBackend *blk;
char *cmdline;
Error *local_err = NULL;
/* add s_local_disk and forge S_LOCAL_DISK_ID */
cmdline = g_strdup_printf("file.filename=%s,driver=qcow2,"
"file.locking=off",
s_local_disk);
opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false);
g_free(cmdline);
qdict = qemu_opts_to_qdict(opts, NULL);
qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
blk = blk_new_open(NULL, NULL, qdict, BDRV_O_RDWR, &local_err);
assert(blk);
monitor_add_blk(blk, S_LOCAL_DISK_ID, &local_err);
g_assert(!local_err);
/* format s_local_disk with pattern "0x11" */
test_blk_write(blk, 0x11, 0, IMG_SIZE, false);
qemu_opts_del(opts);
/* add S_(ACTIVE/HIDDEN)_DISK and forge S_ID */
cmdline = g_strdup_printf("driver=replication,mode=secondary,top-id=%s,"
"file.driver=qcow2,file.file.filename=%s,"
"file.file.locking=off,"
"file.backing.driver=qcow2,"
"file.backing.file.filename=%s,"
"file.backing.file.locking=off,"
"file.backing.backing=%s"
, S_ID, s_active_disk, s_hidden_disk
, S_LOCAL_DISK_ID);
opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false);
g_free(cmdline);
qdict = qemu_opts_to_qdict(opts, NULL);
qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
blk = blk_new_open(NULL, NULL, qdict, BDRV_O_RDWR, &local_err);
assert(blk);
monitor_add_blk(blk, S_ID, &local_err);
g_assert(!local_err);
qemu_opts_del(opts);
return blk;
}
static void teardown_secondary(void)
{
/* only need to destroy two BBs */
BlockBackend *blk;
AioContext *ctx;
/* remove S_LOCAL_DISK_ID */
blk = blk_by_name(S_LOCAL_DISK_ID);
assert(blk);
ctx = blk_get_aio_context(blk);
aio_context_acquire(ctx);
monitor_remove_blk(blk);
blk_unref(blk);
aio_context_release(ctx);
/* remove S_ID */
blk = blk_by_name(S_ID);
assert(blk);
ctx = blk_get_aio_context(blk);
aio_context_acquire(ctx);
monitor_remove_blk(blk);
blk_unref(blk);
aio_context_release(ctx);
}
static void test_secondary_read(void)
{
BlockBackend *blk;
blk = start_secondary();
/* read from 0 to IMG_SIZE */
test_blk_read(blk, 0, 0, IMG_SIZE, 0, IMG_SIZE, true);
teardown_secondary();
}
static void test_secondary_write(void)
{
BlockBackend *blk;
blk = start_secondary();
/* write from 0 to IMG_SIZE */
test_blk_write(blk, 0, 0, IMG_SIZE, true);
teardown_secondary();
}
static void test_secondary_start(void)
{
BlockBackend *top_blk, *local_blk;
Error *local_err = NULL;
bool failover = true;
top_blk = start_secondary();
replication_start_all(REPLICATION_MODE_SECONDARY, &local_err);
g_assert(!local_err);
/* read from s_local_disk (0, IMG_SIZE) */
test_blk_read(top_blk, 0x11, 0, IMG_SIZE, 0, IMG_SIZE, false);
/* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
local_blk = blk_by_name(S_LOCAL_DISK_ID);
test_blk_write(local_blk, 0x22, IMG_SIZE / 2, IMG_SIZE / 2, false);
/* replication will backup s_local_disk to s_hidden_disk */
test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
/* write 0x33 to s_active_disk (0, IMG_SIZE / 2) */
test_blk_write(top_blk, 0x33, 0, IMG_SIZE / 2, false);
/* read from s_active_disk (0, IMG_SIZE/2) */
test_blk_read(top_blk, 0x33, 0, IMG_SIZE / 2,
0, IMG_SIZE / 2, false);
/* unblock top_bs */
replication_stop_all(failover, &local_err);
g_assert(!local_err);
teardown_secondary();
}
static void test_secondary_stop(void)
{
BlockBackend *top_blk, *local_blk;
Error *local_err = NULL;
bool failover = true;
top_blk = start_secondary();
replication_start_all(REPLICATION_MODE_SECONDARY, &local_err);
g_assert(!local_err);
/* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
local_blk = blk_by_name(S_LOCAL_DISK_ID);
test_blk_write(local_blk, 0x22, IMG_SIZE / 2, IMG_SIZE / 2, false);
/* replication will backup s_local_disk to s_hidden_disk */
test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
/* write 0x33 to s_active_disk (0, IMG_SIZE / 2) */
test_blk_write(top_blk, 0x33, 0, IMG_SIZE / 2, false);
/* do active commit */
replication_stop_all(failover, &local_err);
g_assert(!local_err);
/* read from s_local_disk (0, IMG_SIZE / 2) */
test_blk_read(top_blk, 0x33, 0, IMG_SIZE / 2,
0, IMG_SIZE / 2, false);
/* read from s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
test_blk_read(top_blk, 0x22, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
teardown_secondary();
}
static void test_secondary_continuous_replication(void)
{
BlockBackend *top_blk, *local_blk;
Error *local_err = NULL;
top_blk = start_secondary();
replication_start_all(REPLICATION_MODE_SECONDARY, &local_err);
g_assert(!local_err);
/* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
local_blk = blk_by_name(S_LOCAL_DISK_ID);
test_blk_write(local_blk, 0x22, IMG_SIZE / 2, IMG_SIZE / 2, false);
/* replication will backup s_local_disk to s_hidden_disk */
test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
/* write 0x33 to s_active_disk (0, IMG_SIZE / 2) */
test_blk_write(top_blk, 0x33, 0, IMG_SIZE / 2, false);
/* do failover (active commit) */
replication_stop_all(true, &local_err);
g_assert(!local_err);
/* it should ignore all requests from now on */
/* start after failover */
replication_start_all(REPLICATION_MODE_PRIMARY, &local_err);
g_assert(!local_err);
/* checkpoint */
replication_do_checkpoint_all(&local_err);
g_assert(!local_err);
/* stop */
replication_stop_all(true, &local_err);
g_assert(!local_err);
/* read from s_local_disk (0, IMG_SIZE / 2) */
test_blk_read(top_blk, 0x33, 0, IMG_SIZE / 2,
0, IMG_SIZE / 2, false);
/* read from s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
test_blk_read(top_blk, 0x22, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
teardown_secondary();
}
static void test_secondary_do_checkpoint(void)
{
BlockBackend *top_blk, *local_blk;
Error *local_err = NULL;
bool failover = true;
top_blk = start_secondary();
replication_start_all(REPLICATION_MODE_SECONDARY, &local_err);
g_assert(!local_err);
/* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
local_blk = blk_by_name(S_LOCAL_DISK_ID);
test_blk_write(local_blk, 0x22, IMG_SIZE / 2,
IMG_SIZE / 2, false);
/* replication will backup s_local_disk to s_hidden_disk */
test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
replication_do_checkpoint_all(&local_err);
g_assert(!local_err);
/* after checkpoint, read pattern 0x22 from s_local_disk */
test_blk_read(top_blk, 0x22, IMG_SIZE / 2,
IMG_SIZE / 2, 0, IMG_SIZE, false);
/* unblock top_bs */
replication_stop_all(failover, &local_err);
g_assert(!local_err);
teardown_secondary();
}
static void test_secondary_get_error_all(void)
{
Error *local_err = NULL;
bool failover = true;
start_secondary();
replication_start_all(REPLICATION_MODE_SECONDARY, &local_err);
g_assert(!local_err);
replication_get_error_all(&local_err);
g_assert(!local_err);
/* unblock top_bs */
replication_stop_all(failover, &local_err);
g_assert(!local_err);
teardown_secondary();
}
static void sigabrt_handler(int signo)
{
cleanup_imgs();
}
static void setup_sigabrt_handler(void)
{
struct sigaction sigact;
sigact = (struct sigaction) {
.sa_handler = sigabrt_handler,
.sa_flags = SA_RESETHAND,
};
sigemptyset(&sigact.sa_mask);
sigaction(SIGABRT, &sigact, NULL);
}
int main(int argc, char **argv)
{
int ret;
qemu_init_main_loop(&error_fatal);
bdrv_init();
g_test_init(&argc, &argv, NULL);
setup_sigabrt_handler();
prepare_imgs();
/* Primary */
g_test_add_func("/replication/primary/read", test_primary_read);
g_test_add_func("/replication/primary/write", test_primary_write);
g_test_add_func("/replication/primary/start", test_primary_start);
g_test_add_func("/replication/primary/stop", test_primary_stop);
g_test_add_func("/replication/primary/do_checkpoint",
test_primary_do_checkpoint);
g_test_add_func("/replication/primary/get_error_all",
test_primary_get_error_all);
/* Secondary */
g_test_add_func("/replication/secondary/read", test_secondary_read);
g_test_add_func("/replication/secondary/write", test_secondary_write);
g_test_add_func("/replication/secondary/start", test_secondary_start);
g_test_add_func("/replication/secondary/stop", test_secondary_stop);
g_test_add_func("/replication/secondary/continuous_replication",
test_secondary_continuous_replication);
g_test_add_func("/replication/secondary/do_checkpoint",
test_secondary_do_checkpoint);
g_test_add_func("/replication/secondary/get_error_all",
test_secondary_get_error_all);
ret = g_test_run();
cleanup_imgs();
return ret;
}
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