diff --git a/block/backup-top.c b/block/backup-top.c
index fe6883cc970965ff1acf3c17cbbde98355ce0486..789acf6965d053273e194e9a5ed2a0eed486a777 100644
--- a/block/backup-top.c
+++ b/block/backup-top.c
@@ -186,6 +186,7 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
BlockDriverState *target,
const char *filter_node_name,
uint64_t cluster_size,
+ BackupPerf *perf,
BdrvRequestFlags write_flags,
BlockCopyState **bcs,
Error **errp)
@@ -244,7 +245,8 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
state->cluster_size = cluster_size;
state->bcs = block_copy_state_new(top->backing, state->target,
- cluster_size, write_flags, &local_err);
+ cluster_size, perf->use_copy_range,
+ write_flags, &local_err);
if (local_err) {
error_prepend(&local_err, "Cannot create block-copy-state: ");
goto fail;
diff --git a/block/backup-top.h b/block/backup-top.h
index e5cabfa1970934094891188b93992c5bbf750113..b28b0031c456bf783e769f4042aba958f5f54df0 100644
--- a/block/backup-top.h
+++ b/block/backup-top.h
@@ -33,6 +33,7 @@ BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
BlockDriverState *target,
const char *filter_node_name,
uint64_t cluster_size,
+ BackupPerf *perf,
BdrvRequestFlags write_flags,
BlockCopyState **bcs,
Error **errp);
diff --git a/block/backup.c b/block/backup.c
index 9afa0bf3b41229536a5b9e67df8d2965c734406f..4b07e9115d924cd842023e78435942e6d87b2375 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -46,6 +46,7 @@ typedef struct BackupBlockJob {
uint64_t len;
uint64_t bytes_read;
int64_t cluster_size;
+ BackupPerf perf;
BlockCopyState *bcs;
} BackupBlockJob;
@@ -335,6 +336,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
BitmapSyncMode bitmap_mode,
bool compress,
const char *filter_node_name,
+ BackupPerf *perf,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
int creation_flags,
@@ -441,7 +443,8 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
(compress ? BDRV_REQ_WRITE_COMPRESSED : 0),
backup_top = bdrv_backup_top_append(bs, target, filter_node_name,
- cluster_size, write_flags, &bcs, errp);
+ cluster_size, perf,
+ write_flags, &bcs, errp);
if (!backup_top) {
goto error;
}
@@ -464,6 +467,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
job->bcs = bcs;
job->cluster_size = cluster_size;
job->len = len;
+ job->perf = *perf;
block_copy_set_progress_callback(bcs, backup_progress_bytes_callback, job);
block_copy_set_progress_meter(bcs, &job->common.job.progress);
diff --git a/block/block-copy.c b/block/block-copy.c
index cd9bc47c8f6d0509fe7240b53341092458b6b487..63398a171c4efb860039909d5641f93d0e11f313 100644
--- a/block/block-copy.c
+++ b/block/block-copy.c
@@ -218,7 +218,7 @@ static uint32_t block_copy_max_transfer(BdrvChild *source, BdrvChild *target)
}
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
- int64_t cluster_size,
+ int64_t cluster_size, bool use_copy_range,
BdrvRequestFlags write_flags, Error **errp)
{
BlockCopyState *s;
@@ -260,7 +260,7 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
* We enable copy-range, but keep small copy_size, until first
* successful copy_range (look at block_copy_do_copy).
*/
- s->use_copy_range = true;
+ s->use_copy_range = use_copy_range;
s->copy_size = MAX(s->cluster_size, BLOCK_COPY_MAX_BUFFER);
}
diff --git a/block/replication.c b/block/replication.c
index 0c70215784da9cd4516919f25928f55a06679c41..22ffc811eef2bbc56054700b52537c469db0bc34 100644
--- a/block/replication.c
+++ b/block/replication.c
@@ -454,6 +454,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
int64_t active_length, hidden_length, disk_length;
AioContext *aio_context;
Error *local_err = NULL;
+ BackupPerf perf = { .use_copy_range = true };
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
@@ -558,6 +559,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
s->backup_job = backup_job_create(
NULL, s->secondary_disk->bs, s->hidden_disk->bs,
0, MIRROR_SYNC_MODE_NONE, NULL, 0, false, NULL,
+ &perf,
BLOCKDEV_ON_ERROR_REPORT,
BLOCKDEV_ON_ERROR_REPORT, JOB_INTERNAL,
backup_job_completed, bs, NULL, &local_err);
diff --git a/blockdev.c b/blockdev.c
index 0540c621dad2509889d7ddeef3595c1024b10c02..fc88dc03e1338f458b8ab085462e8aac54a02298 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2829,6 +2829,7 @@ static BlockJob *do_backup_common(BackupCommon *backup,
{
BlockJob *job = NULL;
BdrvDirtyBitmap *bmap = NULL;
+ BackupPerf perf = { .use_copy_range = true };
int job_flags = JOB_DEFAULT;
if (!backup->has_speed) {
@@ -2853,6 +2854,12 @@ static BlockJob *do_backup_common(BackupCommon *backup,
backup->compress = false;
}
+ if (backup->x_perf) {
+ if (backup->x_perf->has_use_copy_range) {
+ perf.use_copy_range = backup->x_perf->use_copy_range;
+ }
+ }
+
if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) ||
(backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) {
/* done before desugaring 'incremental' to print the right message */
@@ -2926,6 +2933,7 @@ static BlockJob *do_backup_common(BackupCommon *backup,
backup->sync, bmap, backup->bitmap_mode,
backup->compress,
backup->filter_node_name,
+ &perf,
backup->on_source_error,
backup->on_target_error,
job_flags, NULL, NULL, txn, errp);
diff --git a/include/block/block-copy.h b/include/block/block-copy.h
index aac85e14880a430a0d37c6ac0ed570bdaaf9a327..6397505f306b55dd07300ba9d63aab3d4bf67995 100644
--- a/include/block/block-copy.h
+++ b/include/block/block-copy.h
@@ -22,7 +22,7 @@ typedef void (*ProgressBytesCallbackFunc)(int64_t bytes, void *opaque);
typedef struct BlockCopyState BlockCopyState;
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
- int64_t cluster_size,
+ int64_t cluster_size, bool use_copy_range,
BdrvRequestFlags write_flags,
Error **errp);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index f4b844f31066dc17e376dbe6e9991264e77c8a9d..d01fc23720288594a81037895bfa4cdf2aef911d 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -1266,6 +1266,8 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
* @sync_mode: What parts of the disk image should be copied to the destination.
* @sync_bitmap: The dirty bitmap if sync_mode is 'bitmap' or 'incremental'
* @bitmap_mode: The bitmap synchronization policy to use.
+ * @perf: Performance options. All actual fields assumed to be present,
+ * all ".has_*" fields are ignored.
* @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.
* @creation_flags: Flags that control the behavior of the Job lifetime.
@@ -1284,6 +1286,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
BitmapSyncMode bitmap_mode,
bool compress,
const char *filter_node_name,
+ BackupPerf *perf,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
int creation_flags,
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 1d9dcd7d303e117def5a4972662eef59a6cbfa49..83f661d7f6b4a9b197f672e7620cd9dd0309b6bd 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1371,6 +1371,19 @@
{ 'struct': 'BlockdevSnapshot',
'data': { 'node': 'str', 'overlay': 'str' } }
+##
+# @BackupPerf:
+#
+# Optional parameters for backup. These parameters don't affect
+# functionality, but may significantly affect performance.
+#
+# @use-copy-range: Use copy offloading. Default true.
+#
+# Since: 6.0
+##
+{ 'struct': 'BackupPerf',
+ 'data': { '*use-copy-range': 'bool' }}
+
##
# @BackupCommon:
#
@@ -1426,6 +1439,8 @@
# above node specified by @drive. If this option is not given,
# a node name is autogenerated. (Since: 4.2)
#
+# @x-perf: Performance options. (Since 6.0)
+#
# Note: @on-source-error and @on-target-error only affect background
# I/O. If an error occurs during a guest write request, the device's
# rerror/werror actions will be used.
@@ -1440,7 +1455,7 @@
'*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool',
- '*filter-node-name': 'str' } }
+ '*filter-node-name': 'str', '*x-perf': 'BackupPerf' } }
##
# @DriveBackup: