@@ -26,6 +26,8 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
int64_t cluster_size, bool use_copy_range,
bool compress, Error **errp);
+void block_copy_set_copy_opts(BlockCopyState *s, bool use_copy_range,
+ bool compress);
void block_copy_set_progress_meter(BlockCopyState *s, ProgressMeter *pm);
void block_copy_state_free(BlockCopyState *s);
@@ -245,6 +245,37 @@ static uint32_t block_copy_max_transfer(BdrvChild *source, BdrvChild *target)
target->bs->bl.max_transfer));
}
+/* Function should be called prior any actual copy request */
+void block_copy_set_copy_opts(BlockCopyState *s, bool use_copy_range,
+ bool compress)
+{
+ if (compress) {
+ s->write_flags |= BDRV_REQ_WRITE_COMPRESSED;
+ }
+
+ if (block_copy_max_transfer(s->source, s->target) < s->cluster_size) {
+ /*
+ * copy_range does not respect max_transfer. We don't want to bother
+ * with requests smaller than block-copy cluster size, so fallback to
+ * buffered copying (read and write respect max_transfer on their
+ * behalf).
+ */
+ s->use_copy_range = false;
+ s->copy_size = s->cluster_size;
+ } else if (compress) {
+ /* Compression supports only cluster-size writes and no copy-range. */
+ s->use_copy_range = false;
+ s->copy_size = s->cluster_size;
+ } else {
+ /*
+ * We enable copy-range, but keep small copy_size, until first
+ * successful copy_range (look at block_copy_do_copy).
+ */
+ s->use_copy_range = use_copy_range;
+ s->copy_size = MAX(s->cluster_size, BLOCK_COPY_MAX_BUFFER);
+ }
+}
+
BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
int64_t cluster_size, bool use_copy_range,
bool compress, Error **errp)
@@ -288,32 +319,11 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
.copy_bitmap = copy_bitmap,
.cluster_size = cluster_size,
.len = bdrv_dirty_bitmap_size(copy_bitmap),
- .write_flags = BDRV_REQ_SERIALISING |
- (compress ? BDRV_REQ_WRITE_COMPRESSED : 0),
+ .write_flags = BDRV_REQ_SERIALISING,
.mem = shres_create(BLOCK_COPY_MAX_MEM),
};
- if (block_copy_max_transfer(source, target) < cluster_size) {
- /*
- * copy_range does not respect max_transfer. We don't want to bother
- * with requests smaller than block-copy cluster size, so fallback to
- * buffered copying (read and write respect max_transfer on their
- * behalf).
- */
- s->use_copy_range = false;
- s->copy_size = cluster_size;
- } else if (compress) {
- /* Compression supports only cluster-size writes and no copy-range. */
- s->use_copy_range = false;
- s->copy_size = cluster_size;
- } else {
- /*
- * We enable copy-range, but keep small copy_size, until first
- * successful copy_range (look at block_copy_do_copy).
- */
- s->use_copy_range = use_copy_range;
- s->copy_size = MAX(s->cluster_size, BLOCK_COPY_MAX_BUFFER);
- }
+ block_copy_set_copy_opts(s, use_copy_range, compress);
ratelimit_init(&s->rate_limit);
QLIST_INIT(&s->tasks);
We'll need a possibility to set compress and use_copy_range options after initialization of the state. So make corresponding part of block_copy_state_new() separate and public. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- include/block/block-copy.h | 2 ++ block/block-copy.c | 56 ++++++++++++++++++++++---------------- 2 files changed, 35 insertions(+), 23 deletions(-)