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qmp: Add optional bool "unmap" to drive-mirror

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If specified as "true", it allows discarding on target sectors where source is
not allocated.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2015-06-08 13:56:08 +08:00 • committed by Stefan Hajnoczi
parent ba3f0e2545
commit 0fc9f8ea28
6 changed files with 24 additions and 4 deletions
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5
blockdev.c
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@ -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);