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xemu/tests/test-block-iothread.c
Max Reitz c80d8b06cf block: Add @exact parameter to bdrv_co_truncate() 
We have two drivers (iscsi and file-posix) that (in some cases) return
success from their .bdrv_co_truncate() implementation if the block
device is larger than the requested offset, but cannot be shrunk.  Some
callers do not want that behavior, so this patch adds a new parameter
that they can use to turn off that behavior.

This patch just adds the parameter and lets the block/io.c and
block/block-backend.c functions pass it around.  All other callers
always pass false and none of the implementations evaluate it, so that
this patch does not change existing behavior.  Future patches take care
of that.

Suggested-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190918095144.955-5-mreitz@redhat.com
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-10-28 12:00:07 +01:00

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/*
* Block tests for iothreads
*
* Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "block/block.h"
#include "block/blockjob_int.h"
#include "sysemu/block-backend.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
#include "qemu/main-loop.h"
#include "iothread.h"
static int coroutine_fn bdrv_test_co_prwv(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
{
return 0;
}
static int coroutine_fn bdrv_test_co_pdiscard(BlockDriverState *bs,
int64_t offset, int bytes)
{
return 0;
}
static int coroutine_fn
bdrv_test_co_truncate(BlockDriverState *bs, int64_t offset, bool exact,
PreallocMode prealloc, Error **errp)
{
return 0;
}
static int coroutine_fn bdrv_test_co_block_status(BlockDriverState *bs,
bool want_zero,
int64_t offset, int64_t count,
int64_t *pnum, int64_t *map,
BlockDriverState **file)
{
*pnum = count;
return 0;
}
static BlockDriver bdrv_test = {
.format_name = "test",
.instance_size = 1,
.bdrv_co_preadv = bdrv_test_co_prwv,
.bdrv_co_pwritev = bdrv_test_co_prwv,
.bdrv_co_pdiscard = bdrv_test_co_pdiscard,
.bdrv_co_truncate = bdrv_test_co_truncate,
.bdrv_co_block_status = bdrv_test_co_block_status,
};
static void test_sync_op_pread(BdrvChild *c)
{
uint8_t buf[512];
int ret;
/* Success */
ret = bdrv_pread(c, 0, buf, sizeof(buf));
g_assert_cmpint(ret, ==, 512);
/* Early error: Negative offset */
ret = bdrv_pread(c, -2, buf, sizeof(buf));
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_pwrite(BdrvChild *c)
{
uint8_t buf[512];
int ret;
/* Success */
ret = bdrv_pwrite(c, 0, buf, sizeof(buf));
g_assert_cmpint(ret, ==, 512);
/* Early error: Negative offset */
ret = bdrv_pwrite(c, -2, buf, sizeof(buf));
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_blk_pread(BlockBackend *blk)
{
uint8_t buf[512];
int ret;
/* Success */
ret = blk_pread(blk, 0, buf, sizeof(buf));
g_assert_cmpint(ret, ==, 512);
/* Early error: Negative offset */
ret = blk_pread(blk, -2, buf, sizeof(buf));
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_blk_pwrite(BlockBackend *blk)
{
uint8_t buf[512];
int ret;
/* Success */
ret = blk_pwrite(blk, 0, buf, sizeof(buf), 0);
g_assert_cmpint(ret, ==, 512);
/* Early error: Negative offset */
ret = blk_pwrite(blk, -2, buf, sizeof(buf), 0);
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_load_vmstate(BdrvChild *c)
{
uint8_t buf[512];
int ret;
/* Error: Driver does not support snapshots */
ret = bdrv_load_vmstate(c->bs, buf, 0, sizeof(buf));
g_assert_cmpint(ret, ==, -ENOTSUP);
}
static void test_sync_op_save_vmstate(BdrvChild *c)
{
uint8_t buf[512];
int ret;
/* Error: Driver does not support snapshots */
ret = bdrv_save_vmstate(c->bs, buf, 0, sizeof(buf));
g_assert_cmpint(ret, ==, -ENOTSUP);
}
static void test_sync_op_pdiscard(BdrvChild *c)
{
int ret;
/* Normal success path */
c->bs->open_flags |= BDRV_O_UNMAP;
ret = bdrv_pdiscard(c, 0, 512);
g_assert_cmpint(ret, ==, 0);
/* Early success: UNMAP not supported */
c->bs->open_flags &= ~BDRV_O_UNMAP;
ret = bdrv_pdiscard(c, 0, 512);
g_assert_cmpint(ret, ==, 0);
/* Early error: Negative offset */
ret = bdrv_pdiscard(c, -2, 512);
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_blk_pdiscard(BlockBackend *blk)
{
int ret;
/* Early success: UNMAP not supported */
ret = blk_pdiscard(blk, 0, 512);
g_assert_cmpint(ret, ==, 0);
/* Early error: Negative offset */
ret = blk_pdiscard(blk, -2, 512);
g_assert_cmpint(ret, ==, -EIO);
}
static void test_sync_op_truncate(BdrvChild *c)
{
int ret;
/* Normal success path */
ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, NULL);
g_assert_cmpint(ret, ==, 0);
/* Early error: Negative offset */
ret = bdrv_truncate(c, -2, false, PREALLOC_MODE_OFF, NULL);
g_assert_cmpint(ret, ==, -EINVAL);
/* Error: Read-only image */
c->bs->read_only = true;
c->bs->open_flags &= ~BDRV_O_RDWR;
ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, NULL);
g_assert_cmpint(ret, ==, -EACCES);
c->bs->read_only = false;
c->bs->open_flags |= BDRV_O_RDWR;
}
static void test_sync_op_block_status(BdrvChild *c)
{
int ret;
int64_t n;
/* Normal success path */
ret = bdrv_is_allocated(c->bs, 0, 65536, &n);
g_assert_cmpint(ret, ==, 0);
/* Early success: No driver support */
bdrv_test.bdrv_co_block_status = NULL;
ret = bdrv_is_allocated(c->bs, 0, 65536, &n);
g_assert_cmpint(ret, ==, 1);
/* Early success: bytes = 0 */
ret = bdrv_is_allocated(c->bs, 0, 0, &n);
g_assert_cmpint(ret, ==, 0);
/* Early success: Offset > image size*/
ret = bdrv_is_allocated(c->bs, 0x1000000, 0x1000000, &n);
g_assert_cmpint(ret, ==, 0);
}
static void test_sync_op_flush(BdrvChild *c)
{
int ret;
/* Normal success path */
ret = bdrv_flush(c->bs);
g_assert_cmpint(ret, ==, 0);
/* Early success: Read-only image */
c->bs->read_only = true;
c->bs->open_flags &= ~BDRV_O_RDWR;
ret = bdrv_flush(c->bs);
g_assert_cmpint(ret, ==, 0);
c->bs->read_only = false;
c->bs->open_flags |= BDRV_O_RDWR;
}
static void test_sync_op_blk_flush(BlockBackend *blk)
{
BlockDriverState *bs = blk_bs(blk);
int ret;
/* Normal success path */
ret = blk_flush(blk);
g_assert_cmpint(ret, ==, 0);
/* Early success: Read-only image */
bs->read_only = true;
bs->open_flags &= ~BDRV_O_RDWR;
ret = blk_flush(blk);
g_assert_cmpint(ret, ==, 0);
bs->read_only = false;
bs->open_flags |= BDRV_O_RDWR;
}
static void test_sync_op_check(BdrvChild *c)
{
BdrvCheckResult result;
int ret;
/* Error: Driver does not implement check */
ret = bdrv_check(c->bs, &result, 0);
g_assert_cmpint(ret, ==, -ENOTSUP);
}
static void test_sync_op_invalidate_cache(BdrvChild *c)
{
/* Early success: Image is not inactive */
bdrv_invalidate_cache(c->bs, NULL);
}
typedef struct SyncOpTest {
const char *name;
void (*fn)(BdrvChild *c);
void (*blkfn)(BlockBackend *blk);
} SyncOpTest;
const SyncOpTest sync_op_tests[] = {
{
.name = "/sync-op/pread",
.fn = test_sync_op_pread,
.blkfn = test_sync_op_blk_pread,
}, {
.name = "/sync-op/pwrite",
.fn = test_sync_op_pwrite,
.blkfn = test_sync_op_blk_pwrite,
}, {
.name = "/sync-op/load_vmstate",
.fn = test_sync_op_load_vmstate,
}, {
.name = "/sync-op/save_vmstate",
.fn = test_sync_op_save_vmstate,
}, {
.name = "/sync-op/pdiscard",
.fn = test_sync_op_pdiscard,
.blkfn = test_sync_op_blk_pdiscard,
}, {
.name = "/sync-op/truncate",
.fn = test_sync_op_truncate,
}, {
.name = "/sync-op/block_status",
.fn = test_sync_op_block_status,
}, {
.name = "/sync-op/flush",
.fn = test_sync_op_flush,
.blkfn = test_sync_op_blk_flush,
}, {
.name = "/sync-op/check",
.fn = test_sync_op_check,
}, {
.name = "/sync-op/invalidate_cache",
.fn = test_sync_op_invalidate_cache,
},
};
/* Test synchronous operations that run in a different iothread, so we have to
* poll for the coroutine there to return. */
static void test_sync_op(const void *opaque)
{
const SyncOpTest *t = opaque;
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
BlockBackend *blk;
BlockDriverState *bs;
BdrvChild *c;
blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
blk_insert_bs(blk, bs, &error_abort);
c = QLIST_FIRST(&bs->parents);
blk_set_aio_context(blk, ctx, &error_abort);
aio_context_acquire(ctx);
t->fn(c);
if (t->blkfn) {
t->blkfn(blk);
}
blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
aio_context_release(ctx);
bdrv_unref(bs);
blk_unref(blk);
}
typedef struct TestBlockJob {
BlockJob common;
bool should_complete;
int n;
} TestBlockJob;
static int test_job_prepare(Job *job)
{
g_assert(qemu_get_current_aio_context() == qemu_get_aio_context());
return 0;
}
static int coroutine_fn test_job_run(Job *job, Error **errp)
{
TestBlockJob *s = container_of(job, TestBlockJob, common.job);
job_transition_to_ready(&s->common.job);
while (!s->should_complete) {
s->n++;
g_assert(qemu_get_current_aio_context() == job->aio_context);
/* Avoid job_sleep_ns() because it marks the job as !busy. We want to
* emulate some actual activity (probably some I/O) here so that the
* drain involved in AioContext switches has to wait for this activity
* to stop. */
qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 1000000);
job_pause_point(&s->common.job);
}
g_assert(qemu_get_current_aio_context() == job->aio_context);
return 0;
}
static void test_job_complete(Job *job, Error **errp)
{
TestBlockJob *s = container_of(job, TestBlockJob, common.job);
s->should_complete = true;
}
BlockJobDriver test_job_driver = {
.job_driver = {
.instance_size = sizeof(TestBlockJob),
.free = block_job_free,
.user_resume = block_job_user_resume,
.run = test_job_run,
.complete = test_job_complete,
.prepare = test_job_prepare,
},
};
static void test_attach_blockjob(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
BlockBackend *blk;
BlockDriverState *bs;
TestBlockJob *tjob;
blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
blk_insert_bs(blk, bs, &error_abort);
tjob = block_job_create("job0", &test_job_driver, NULL, bs,
0, BLK_PERM_ALL,
0, 0, NULL, NULL, &error_abort);
job_start(&tjob->common.job);
while (tjob->n == 0) {
aio_poll(qemu_get_aio_context(), false);
}
blk_set_aio_context(blk, ctx, &error_abort);
tjob->n = 0;
while (tjob->n == 0) {
aio_poll(qemu_get_aio_context(), false);
}
aio_context_acquire(ctx);
blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
aio_context_release(ctx);
tjob->n = 0;
while (tjob->n == 0) {
aio_poll(qemu_get_aio_context(), false);
}
blk_set_aio_context(blk, ctx, &error_abort);
tjob->n = 0;
while (tjob->n == 0) {
aio_poll(qemu_get_aio_context(), false);
}
aio_context_acquire(ctx);
job_complete_sync(&tjob->common.job, &error_abort);
blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
aio_context_release(ctx);
bdrv_unref(bs);
blk_unref(blk);
}
/*
* Test that changing the AioContext for one node in a tree (here through blk)
* changes all other nodes as well:
*
* blk
* |
* | bs_verify [blkverify]
* | / \
* | / \
* bs_a [bdrv_test] bs_b [bdrv_test]
*
*/
static void test_propagate_basic(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
AioContext *main_ctx;
BlockBackend *blk;
BlockDriverState *bs_a, *bs_b, *bs_verify;
QDict *options;
/* Create bs_a and its BlockBackend */
blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
bs_a = bdrv_new_open_driver(&bdrv_test, "bs_a", BDRV_O_RDWR, &error_abort);
blk_insert_bs(blk, bs_a, &error_abort);
/* Create bs_b */
bs_b = bdrv_new_open_driver(&bdrv_test, "bs_b", BDRV_O_RDWR, &error_abort);
/* Create blkverify filter that references both bs_a and bs_b */
options = qdict_new();
qdict_put_str(options, "driver", "blkverify");
qdict_put_str(options, "test", "bs_a");
qdict_put_str(options, "raw", "bs_b");
bs_verify = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
/* Switch the AioContext */
blk_set_aio_context(blk, ctx, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs_a) == ctx);
g_assert(bdrv_get_aio_context(bs_verify) == ctx);
g_assert(bdrv_get_aio_context(bs_b) == ctx);
/* Switch the AioContext back */
main_ctx = qemu_get_aio_context();
aio_context_acquire(ctx);
blk_set_aio_context(blk, main_ctx, &error_abort);
aio_context_release(ctx);
g_assert(blk_get_aio_context(blk) == main_ctx);
g_assert(bdrv_get_aio_context(bs_a) == main_ctx);
g_assert(bdrv_get_aio_context(bs_verify) == main_ctx);
g_assert(bdrv_get_aio_context(bs_b) == main_ctx);
bdrv_unref(bs_verify);
bdrv_unref(bs_b);
bdrv_unref(bs_a);
blk_unref(blk);
}
/*
* Test that diamonds in the graph don't lead to endless recursion:
*
* blk
* |
* bs_verify [blkverify]
* / \
* / \
* bs_b [raw] bs_c[raw]
* \ /
* \ /
* bs_a [bdrv_test]
*/
static void test_propagate_diamond(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
AioContext *main_ctx;
BlockBackend *blk;
BlockDriverState *bs_a, *bs_b, *bs_c, *bs_verify;
QDict *options;
/* Create bs_a */
bs_a = bdrv_new_open_driver(&bdrv_test, "bs_a", BDRV_O_RDWR, &error_abort);
/* Create bs_b and bc_c */
options = qdict_new();
qdict_put_str(options, "driver", "raw");
qdict_put_str(options, "file", "bs_a");
qdict_put_str(options, "node-name", "bs_b");
bs_b = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
options = qdict_new();
qdict_put_str(options, "driver", "raw");
qdict_put_str(options, "file", "bs_a");
qdict_put_str(options, "node-name", "bs_c");
bs_c = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
/* Create blkverify filter that references both bs_b and bs_c */
options = qdict_new();
qdict_put_str(options, "driver", "blkverify");
qdict_put_str(options, "test", "bs_b");
qdict_put_str(options, "raw", "bs_c");
bs_verify = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
blk_insert_bs(blk, bs_verify, &error_abort);
/* Switch the AioContext */
blk_set_aio_context(blk, ctx, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs_verify) == ctx);
g_assert(bdrv_get_aio_context(bs_a) == ctx);
g_assert(bdrv_get_aio_context(bs_b) == ctx);
g_assert(bdrv_get_aio_context(bs_c) == ctx);
/* Switch the AioContext back */
main_ctx = qemu_get_aio_context();
aio_context_acquire(ctx);
blk_set_aio_context(blk, main_ctx, &error_abort);
aio_context_release(ctx);
g_assert(blk_get_aio_context(blk) == main_ctx);
g_assert(bdrv_get_aio_context(bs_verify) == main_ctx);
g_assert(bdrv_get_aio_context(bs_a) == main_ctx);
g_assert(bdrv_get_aio_context(bs_b) == main_ctx);
g_assert(bdrv_get_aio_context(bs_c) == main_ctx);
blk_unref(blk);
bdrv_unref(bs_verify);
bdrv_unref(bs_c);
bdrv_unref(bs_b);
bdrv_unref(bs_a);
}
static void test_propagate_mirror(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
AioContext *main_ctx = qemu_get_aio_context();
BlockDriverState *src, *target, *filter;
BlockBackend *blk;
Job *job;
Error *local_err = NULL;
/* Create src and target*/
src = bdrv_new_open_driver(&bdrv_test, "src", BDRV_O_RDWR, &error_abort);
target = bdrv_new_open_driver(&bdrv_test, "target", BDRV_O_RDWR,
&error_abort);
/* Start a mirror job */
mirror_start("job0", src, target, NULL, JOB_DEFAULT, 0, 0, 0,
MIRROR_SYNC_MODE_NONE, MIRROR_OPEN_BACKING_CHAIN, false,
BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT,
false, "filter_node", MIRROR_COPY_MODE_BACKGROUND,
&error_abort);
job = job_get("job0");
filter = bdrv_find_node("filter_node");
/* Change the AioContext of src */
bdrv_try_set_aio_context(src, ctx, &error_abort);
g_assert(bdrv_get_aio_context(src) == ctx);
g_assert(bdrv_get_aio_context(target) == ctx);
g_assert(bdrv_get_aio_context(filter) == ctx);
g_assert(job->aio_context == ctx);
/* Change the AioContext of target */
aio_context_acquire(ctx);
bdrv_try_set_aio_context(target, main_ctx, &error_abort);
aio_context_release(ctx);
g_assert(bdrv_get_aio_context(src) == main_ctx);
g_assert(bdrv_get_aio_context(target) == main_ctx);
g_assert(bdrv_get_aio_context(filter) == main_ctx);
/* With a BlockBackend on src, changing target must fail */
blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
blk_insert_bs(blk, src, &error_abort);
bdrv_try_set_aio_context(target, ctx, &local_err);
g_assert(local_err);
error_free(local_err);
g_assert(blk_get_aio_context(blk) == main_ctx);
g_assert(bdrv_get_aio_context(src) == main_ctx);
g_assert(bdrv_get_aio_context(target) == main_ctx);
g_assert(bdrv_get_aio_context(filter) == main_ctx);
/* ...unless we explicitly allow it */
aio_context_acquire(ctx);
blk_set_allow_aio_context_change(blk, true);
bdrv_try_set_aio_context(target, ctx, &error_abort);
aio_context_release(ctx);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(src) == ctx);
g_assert(bdrv_get_aio_context(target) == ctx);
g_assert(bdrv_get_aio_context(filter) == ctx);
job_cancel_sync_all();
aio_context_acquire(ctx);
blk_set_aio_context(blk, main_ctx, &error_abort);
bdrv_try_set_aio_context(target, main_ctx, &error_abort);
aio_context_release(ctx);
blk_unref(blk);
bdrv_unref(src);
bdrv_unref(target);
}
static void test_attach_second_node(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
AioContext *main_ctx = qemu_get_aio_context();
BlockBackend *blk;
BlockDriverState *bs, *filter;
QDict *options;
blk = blk_new(ctx, BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
blk_insert_bs(blk, bs, &error_abort);
options = qdict_new();
qdict_put_str(options, "driver", "raw");
qdict_put_str(options, "file", "base");
filter = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == ctx);
g_assert(bdrv_get_aio_context(filter) == ctx);
aio_context_acquire(ctx);
blk_set_aio_context(blk, main_ctx, &error_abort);
aio_context_release(ctx);
g_assert(blk_get_aio_context(blk) == main_ctx);
g_assert(bdrv_get_aio_context(bs) == main_ctx);
g_assert(bdrv_get_aio_context(filter) == main_ctx);
bdrv_unref(filter);
bdrv_unref(bs);
blk_unref(blk);
}
static void test_attach_preserve_blk_ctx(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
BlockBackend *blk;
BlockDriverState *bs;
blk = blk_new(ctx, BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
/* Add node to BlockBackend that has an iothread context assigned */
blk_insert_bs(blk, bs, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == ctx);
/* Remove the node again */
aio_context_acquire(ctx);
blk_remove_bs(blk);
aio_context_release(ctx);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == qemu_get_aio_context());
/* Re-attach the node */
blk_insert_bs(blk, bs, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == ctx);
aio_context_acquire(ctx);
blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
aio_context_release(ctx);
bdrv_unref(bs);
blk_unref(blk);
}
int main(int argc, char **argv)
{
int i;
bdrv_init();
qemu_init_main_loop(&error_abort);
g_test_init(&argc, &argv, NULL);
for (i = 0; i < ARRAY_SIZE(sync_op_tests); i++) {
const SyncOpTest *t = &sync_op_tests[i];
g_test_add_data_func(t->name, t, test_sync_op);
}
g_test_add_func("/attach/blockjob", test_attach_blockjob);
g_test_add_func("/attach/second_node", test_attach_second_node);
g_test_add_func("/attach/preserve_blk_ctx", test_attach_preserve_blk_ctx);
g_test_add_func("/propagate/basic", test_propagate_basic);
g_test_add_func("/propagate/diamond", test_propagate_diamond);
g_test_add_func("/propagate/mirror", test_propagate_mirror);
return g_test_run();
}
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