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