diff options
| -rw-r--r-- | block/mirror.c | 8 | ||||
| -rw-r--r-- | blockdev.c | 5 | ||||
| -rw-r--r-- | hmp.c | 2 | ||||
| -rw-r--r-- | include/block/block_int.h | 2 | ||||
| -rw-r--r-- | qapi/block-core.json | 8 | ||||
| -rw-r--r-- | qmp-commands.hx | 3 |
6 files changed, 24 insertions, 4 deletions
diff --git a/block/mirror.c b/block/mirror.c index 49aa8bc1b1..4be06a5082 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -58,6 +58,7 @@ typedef struct MirrorBlockJob { int in_flight; int sectors_in_flight; int ret; + bool unmap; } MirrorBlockJob; typedef struct MirrorOp { @@ -652,6 +653,7 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target, int64_t buf_size, BlockdevOnError on_source_error, BlockdevOnError on_target_error, + bool unmap, BlockCompletionFunc *cb, void *opaque, Error **errp, const BlockJobDriver *driver, @@ -686,6 +688,7 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target, s->base = base; s->granularity = granularity; s->buf_size = MAX(buf_size, granularity); + s->unmap = unmap; s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp); if (!s->dirty_bitmap) { @@ -704,6 +707,7 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target, int64_t speed, uint32_t granularity, int64_t buf_size, MirrorSyncMode mode, BlockdevOnError on_source_error, BlockdevOnError on_target_error, + bool unmap, BlockCompletionFunc *cb, void *opaque, Error **errp) { @@ -718,7 +722,7 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target, base = mode == MIRROR_SYNC_MODE_TOP ? bs->backing_hd : NULL; mirror_start_job(bs, target, replaces, speed, granularity, buf_size, - on_source_error, on_target_error, cb, opaque, errp, + on_source_error, on_target_error, unmap, cb, opaque, errp, &mirror_job_driver, is_none_mode, base); } @@ -766,7 +770,7 @@ void commit_active_start(BlockDriverState *bs, BlockDriverState *base, bdrv_ref(base); mirror_start_job(bs, base, NULL, speed, 0, 0, - on_error, on_error, cb, opaque, &local_err, + on_error, on_error, false, cb, opaque, &local_err, &commit_active_job_driver, false, base); if (local_err) { error_propagate(errp, local_err); diff --git a/blockdev.c b/blockdev.c index 4d5e016e62..7fee519a1c 100644 --- a/blockdev.c +++ b/blockdev.c @@ -2655,6 +2655,7 @@ void qmp_drive_mirror(const char *device, const char *target, 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, + bool has_unmap, bool unmap, Error **errp) { BlockBackend *blk; @@ -2686,6 +2687,9 @@ void qmp_drive_mirror(const char *device, const char *target, if (!has_buf_size) { buf_size = DEFAULT_MIRROR_BUF_SIZE; } + if (!has_unmap) { + unmap = true; + } if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", @@ -2827,6 +2831,7 @@ void qmp_drive_mirror(const char *device, const char *target, has_replaces ? replaces : NULL, speed, granularity, buf_size, sync, on_source_error, on_target_error, + unmap, block_job_cb, bs, &local_err); if (local_err != NULL) { bdrv_unref(target_bs); @@ -1061,7 +1061,7 @@ void hmp_drive_mirror(Monitor *mon, const QDict *qdict) false, NULL, false, NULL, full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP, true, mode, false, 0, false, 0, false, 0, - false, 0, false, 0, &err); + false, 0, false, 0, false, true, &err); hmp_handle_error(mon, &err); } diff --git a/include/block/block_int.h b/include/block/block_int.h index 44a5cf7557..83ed1a5f7a 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -612,6 +612,7 @@ void commit_active_start(BlockDriverState *bs, BlockDriverState *base, * @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. + * @unmap: Whether to unmap target where source sectors only contain zeroes. * @cb: Completion function for the job. * @opaque: Opaque pointer value passed to @cb. * @errp: Error object. @@ -626,6 +627,7 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target, int64_t speed, uint32_t granularity, int64_t buf_size, MirrorSyncMode mode, BlockdevOnError on_source_error, BlockdevOnError on_target_error, + bool unmap, BlockCompletionFunc *cb, void *opaque, Error **errp); diff --git a/qapi/block-core.json b/qapi/block-core.json index ed3f8902e5..7b2efb8678 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -975,6 +975,11 @@ # @on-target-error: #optional the action to take on an error on the target, # default 'report' (no limitations, since this applies to # a different block device than @device). +# @unmap: #optional Whether to try to unmap target sectors where source has +# only zero. If true, and target unallocated sectors will read as zero, +# target image sectors will be unmapped; otherwise, zeroes will be +# written. Both will result in identical contents. +# Default is true. (Since 2.4) # # Returns: nothing on success # If @device is not a valid block device, DeviceNotFound @@ -987,7 +992,8 @@ 'sync': 'MirrorSyncMode', '*mode': 'NewImageMode', '*speed': 'int', '*granularity': 'uint32', '*buf-size': 'int', '*on-source-error': 'BlockdevOnError', - '*on-target-error': 'BlockdevOnError' } } + '*on-target-error': 'BlockdevOnError', + '*unmap': 'bool' } } ## # @BlockDirtyBitmap diff --git a/qmp-commands.hx b/qmp-commands.hx index 87fa1722fb..e1bcc60380 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1503,6 +1503,7 @@ EQMP .args_type = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?," "node-name:s?,replaces:s?," "on-source-error:s?,on-target-error:s?," + "unmap:b?," "granularity:i?,buf-size:i?", .mhandler.cmd_new = qmp_marshal_input_drive_mirror, }, @@ -1542,6 +1543,8 @@ Arguments: (BlockdevOnError, default 'report') - "on-target-error": the action to take on an error on the target (BlockdevOnError, default 'report') +- "unmap": whether the target sectors should be discarded where source has only + zeroes. (json-bool, optional, default true) The default value of the granularity is the image cluster size clamped between 4096 and 65536, if the image format defines one. If the format |