diff options
| -rw-r--r-- | block/mirror.c | 8 | ||||
| -rw-r--r-- | blockdev.c | 9 | ||||
| -rw-r--r-- | hmp.c | 2 | ||||
| -rw-r--r-- | include/block/block_int.h | 5 | ||||
| -rw-r--r-- | qapi-schema.json | 5 | ||||
| -rw-r--r-- | qmp-commands.hx | 4 | ||||
| -rwxr-xr-x | tests/qemu-iotests/041 | 31 | ||||
| -rw-r--r-- | tests/qemu-iotests/041.out | 4 |
8 files changed, 56 insertions, 12 deletions
diff --git a/block/mirror.c b/block/mirror.c index fc6b9b7..896972c 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -207,7 +207,7 @@ static void coroutine_fn mirror_run(void *opaque) if (backing_filename[0] && !s->target->backing_hd) { bdrv_get_info(s->target, &bdi); if (s->granularity < bdi.cluster_size) { - s->buf_size = bdi.cluster_size; + s->buf_size = MAX(s->buf_size, bdi.cluster_size); length = (bdrv_getlength(bs) + s->granularity - 1) / s->granularity; s->cow_bitmap = bitmap_new(length); } @@ -416,8 +416,8 @@ static BlockJobType mirror_job_type = { }; void mirror_start(BlockDriverState *bs, BlockDriverState *target, - int64_t speed, int64_t granularity, MirrorSyncMode mode, - BlockdevOnError on_source_error, + int64_t speed, int64_t granularity, int64_t buf_size, + MirrorSyncMode mode, BlockdevOnError on_source_error, BlockdevOnError on_target_error, BlockDriverCompletionFunc *cb, void *opaque, Error **errp) @@ -455,7 +455,7 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target, s->target = target; s->mode = mode; s->granularity = granularity; - s->buf_size = granularity; + s->buf_size = MAX(buf_size, granularity); bdrv_set_dirty_tracking(bs, granularity); bdrv_set_enable_write_cache(s->target, true); @@ -1188,12 +1188,15 @@ void qmp_block_commit(const char *device, drive_get_ref(drive_get_by_blockdev(bs)); } +#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) + void qmp_drive_mirror(const char *device, const char *target, bool has_format, const char *format, enum MirrorSyncMode sync, bool has_mode, enum NewImageMode mode, bool has_speed, int64_t speed, bool has_granularity, uint32_t granularity, + bool has_buf_size, int64_t buf_size, bool has_on_source_error, BlockdevOnError on_source_error, bool has_on_target_error, BlockdevOnError on_target_error, Error **errp) @@ -1222,6 +1225,10 @@ void qmp_drive_mirror(const char *device, const char *target, if (!has_granularity) { granularity = 0; } + if (!has_buf_size) { + buf_size = DEFAULT_MIRROR_BUF_SIZE; + } + if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { error_set(errp, QERR_INVALID_PARAMETER, device); return; @@ -1311,7 +1318,7 @@ void qmp_drive_mirror(const char *device, const char *target, return; } - mirror_start(bs, target_bs, speed, granularity, sync, + mirror_start(bs, target_bs, speed, granularity, buf_size, sync, on_source_error, on_target_error, block_job_cb, bs, &local_err); if (local_err != NULL) { @@ -796,7 +796,7 @@ void hmp_drive_mirror(Monitor *mon, const QDict *qdict) qmp_drive_mirror(device, filename, !!format, format, full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP, - true, mode, false, 0, false, 0, + true, mode, false, 0, false, 0, false, 0, false, 0, false, 0, &errp); hmp_handle_error(mon, &errp); } diff --git a/include/block/block_int.h b/include/block/block_int.h index 1165339..f7279b9 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -345,6 +345,7 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base, * @target: Block device to write to. * @speed: The maximum speed, in bytes per second, or 0 for unlimited. * @granularity: The chosen granularity for the dirty bitmap. + * @buf_size: The amount of data that can be in flight at one time. * @mode: Whether to collapse all images in the chain to the target. * @on_source_error: The action to take upon error reading from the source. * @on_target_error: The action to take upon error writing to the target. @@ -358,8 +359,8 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base, * @bs will be switched to read from @target. */ void mirror_start(BlockDriverState *bs, BlockDriverState *target, - int64_t speed, int64_t granularity, MirrorSyncMode mode, - BlockdevOnError on_source_error, + int64_t speed, int64_t granularity, int64_t buf_size, + MirrorSyncMode mode, BlockdevOnError on_source_error, BlockdevOnError on_target_error, BlockDriverCompletionFunc *cb, void *opaque, Error **errp); diff --git a/qapi-schema.json b/qapi-schema.json index fd5ec93..ba75c4d 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -1641,6 +1641,9 @@ # are smaller than that, else the cluster size. Must be a # power of 2 between 512 and 64M (since 1.4). # +# @buf-size: #optional maximum amount of data in flight from source to +# target (since 1.4). +# # @on-source-error: #optional the action to take on an error on the source, # default 'report'. 'stop' and 'enospc' can only be used # if the block device supports io-status (see BlockInfo). @@ -1658,7 +1661,7 @@ 'data': { 'device': 'str', 'target': 'str', '*format': 'str', 'sync': 'MirrorSyncMode', '*mode': 'NewImageMode', '*speed': 'int', '*granularity': 'uint32', - '*on-source-error': 'BlockdevOnError', + '*buf-size': 'int', '*on-source-error': 'BlockdevOnError', '*on-target-error': 'BlockdevOnError' } } ## diff --git a/qmp-commands.hx b/qmp-commands.hx index 835ea26..273b4a6 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -939,7 +939,7 @@ EQMP .name = "drive-mirror", .args_type = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?," "on-source-error:s?,on-target-error:s?," - "granularity:i?", + "granularity:i?,buf-size:i?", .mhandler.cmd_new = qmp_marshal_input_drive_mirror, }, @@ -964,6 +964,8 @@ Arguments: - "speed": maximum speed of the streaming job, in bytes per second (json-int) - "granularity": granularity of the dirty bitmap, in bytes (json-int, optional) +- "buf_size": maximum amount of data in flight from source to target, in bytes + (json-int, default 10M) - "sync": what parts of the disk image should be copied to the destination; possibilities include "full" for all the disk, "top" for only the sectors allocated in the topmost image, or "none" to only replicate new I/O diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041 index a1299b3..b040820 100755 --- a/tests/qemu-iotests/041 +++ b/tests/qemu-iotests/041 @@ -207,6 +207,37 @@ class TestSingleDrive(ImageMirroringTestCase): self.assertTrue(self.compare_images(test_img, target_img), 'target image does not match source after mirroring') + def test_small_buffer(self): + self.assert_no_active_mirrors() + + # A small buffer is rounded up automatically + result = self.vm.qmp('drive-mirror', device='drive0', sync='full', + buf_size=4096, target=target_img) + self.assert_qmp(result, 'return', {}) + + self.complete_and_wait() + result = self.vm.qmp('query-block') + self.assert_qmp(result, 'return[0]/inserted/file', target_img) + self.vm.shutdown() + self.assertTrue(self.compare_images(test_img, target_img), + 'target image does not match source after mirroring') + + def test_small_buffer2(self): + self.assert_no_active_mirrors() + + qemu_img('create', '-f', iotests.imgfmt, '-o', 'cluster_size=%d,size=%d' + % (TestSingleDrive.image_len, TestSingleDrive.image_len), target_img) + result = self.vm.qmp('drive-mirror', device='drive0', sync='full', + buf_size=65536, mode='existing', target=target_img) + self.assert_qmp(result, 'return', {}) + + self.complete_and_wait() + result = self.vm.qmp('query-block') + self.assert_qmp(result, 'return[0]/inserted/file', target_img) + self.vm.shutdown() + self.assertTrue(self.compare_images(test_img, target_img), + 'target image does not match source after mirroring') + def test_large_cluster(self): self.assert_no_active_mirrors() diff --git a/tests/qemu-iotests/041.out b/tests/qemu-iotests/041.out index 3a89159..84bfd63 100644 --- a/tests/qemu-iotests/041.out +++ b/tests/qemu-iotests/041.out @@ -1,5 +1,5 @@ -.................... +...................... ---------------------------------------------------------------------- -Ran 20 tests +Ran 22 tests OK |