The code inside the helper will be extended in the next patch. mirror_run
itself is overbloated at the moment.
Signed-off-by: Denis V. Lunev <d...@openvz.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy<vsement...@virtuozzo.com>
CC: Stefan Hajnoczi <stefa...@redhat.com>
CC: Fam Zheng <f...@redhat.com>
CC: Kevin Wolf <kw...@redhat.com>
CC: Max Reitz <mre...@redhat.com>
CC: Jeff Cody <jc...@redhat.com>
CC: Eric Blake <ebl...@redhat.com>
---
block/mirror.c | 83 ++++++++++++++++++++++++++++++++++------------------------
1 file changed, 49 insertions(+), 34 deletions(-)
diff --git a/block/mirror.c b/block/mirror.c
index 3760e29..797659d 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -501,19 +501,62 @@ static void mirror_exit(BlockJob *job, void *opaque)
bdrv_unref(src);
}
+static int mirror_dirty_init(MirrorBlockJob *s)
+{
+ int64_t sector_num, end;
+ BlockDriverState *base = s->base;
+ BlockDriverState *bs = blk_bs(s->common.blk);
+ BlockDriverState *target_bs = blk_bs(s->target);
+ bool mark_all_dirty = base == NULL && !bdrv_has_zero_init(target_bs);
+ uint64_t last_pause_ns;
+ int ret, n;
+
+ end = s->bdev_length / BDRV_SECTOR_SIZE;
+
+ last_pause_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
+
+ /* First part, loop on the sectors and initialize the dirty bitmap. */
+ for (sector_num = 0; sector_num < end; ) {
+ /* Just to make sure we are not exceeding int limit. */
+ int nb_sectors = MIN(INT_MAX >> BDRV_SECTOR_BITS,
+ end - sector_num);
+ int64_t now = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
+
+ if (now - last_pause_ns > SLICE_TIME) {
+ last_pause_ns = now;
+ block_job_sleep_ns(&s->common, QEMU_CLOCK_REALTIME, 0);
+ }
+
+ if (block_job_is_cancelled(&s->common)) {
+ return 0;
+ }
+
+ ret = bdrv_is_allocated_above(bs, base, sector_num, nb_sectors, &n);
+ if (ret < 0) {
+ return ret;
+ }
+
+ assert(n > 0);
+ if (ret == 1 || mark_all_dirty) {
+ bdrv_set_dirty_bitmap(s->dirty_bitmap, sector_num, n);
+ }
+ sector_num += n;
+ }
+ return 0;
+}
+
static void coroutine_fn mirror_run(void *opaque)
{
MirrorBlockJob *s = opaque;
MirrorExitData *data;
BlockDriverState *bs = blk_bs(s->common.blk);
BlockDriverState *target_bs = blk_bs(s->target);
- int64_t sector_num, end, length;
+ int64_t length;
uint64_t last_pause_ns;
BlockDriverInfo bdi;
char backing_filename[2]; /* we only need 2 characters because we are only
checking for a NULL string */
int ret = 0;
- int n;
int target_cluster_size = BDRV_SECTOR_SIZE;
if (block_job_is_cancelled(&s->common)) {
@@ -555,7 +598,6 @@ static void coroutine_fn mirror_run(void *opaque)
s->target_cluster_sectors = target_cluster_size >> BDRV_SECTOR_BITS;
s->max_iov = MIN(bs->bl.max_iov, target_bs->bl.max_iov);
- end = s->bdev_length / BDRV_SECTOR_SIZE;
s->buf = qemu_try_blockalign(bs, s->buf_size);
if (s->buf == NULL) {
ret = -ENOMEM;
@@ -564,41 +606,14 @@ static void coroutine_fn mirror_run(void *opaque)
mirror_free_init(s);
- last_pause_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
if (!s->is_none_mode) {
- /* First part, loop on the sectors and initialize the dirty bitmap. */
- BlockDriverState *base = s->base;
- bool mark_all_dirty = s->base == NULL &&
!bdrv_has_zero_init(target_bs);
-
- for (sector_num = 0; sector_num < end; ) {
- /* Just to make sure we are not exceeding int limit. */
- int nb_sectors = MIN(INT_MAX >> BDRV_SECTOR_BITS,
- end - sector_num);
- int64_t now = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
-
- if (now - last_pause_ns > SLICE_TIME) {
- last_pause_ns = now;
- block_job_sleep_ns(&s->common, QEMU_CLOCK_REALTIME, 0);
- }
-
- if (block_job_is_cancelled(&s->common)) {
- goto immediate_exit;
- }
-
- ret = bdrv_is_allocated_above(bs, base, sector_num, nb_sectors,
&n);
-
- if (ret < 0) {
- goto immediate_exit;
- }
-
- assert(n > 0);
- if (ret == 1 || mark_all_dirty) {
- bdrv_set_dirty_bitmap(s->dirty_bitmap, sector_num, n);
- }
- sector_num += n;
+ ret = mirror_dirty_init(s);
+ if (ret < 0 || block_job_is_cancelled(&s->common)) {
+ goto immediate_exit;
}
}
+ last_pause_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
bdrv_dirty_iter_init(s->dirty_bitmap, &s->hbi);
for (;;) {
uint64_t delay_ns = 0;
--
2.5.0
