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[Qemu-devel] [PULL 04/14] mirror: create mirror_dirty_init helper for mi
From: |
Jeff Cody |
Subject: |
[Qemu-devel] [PULL 04/14] mirror: create mirror_dirty_init helper for mirror_run |
Date: |
Tue, 19 Jul 2016 20:20:52 -0400 |
From: "Denis V. Lunev" <address@hidden>
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 <address@hidden>
Reviewed-by: Vladimir Sementsov-Ogievskiy<address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Message-id: address@hidden
CC: Stefan Hajnoczi <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Max Reitz <address@hidden>
CC: Jeff Cody <address@hidden>
CC: Eric Blake <address@hidden>
Signed-off-by: Jeff Cody <address@hidden>
---
block/mirror.c | 70 ++++++++++++++++++++++++++++++++++------------------------
1 file changed, 41 insertions(+), 29 deletions(-)
diff --git a/block/mirror.c b/block/mirror.c
index 5fde13b..0e74666 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -527,18 +527,54 @@ static void mirror_throttle(MirrorBlockJob *s)
}
}
+static int coroutine_fn 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);
+ int ret, n;
+
+ end = s->bdev_length / BDRV_SECTOR_SIZE;
+
+ /* 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);
+
+ mirror_throttle(s);
+
+ 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;
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)) {
@@ -580,7 +616,6 @@ 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;
@@ -591,32 +626,9 @@ static void coroutine_fn mirror_run(void *opaque)
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);
-
- mirror_throttle(s);
-
- 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;
}
}
--
1.9.3
- [Qemu-devel] [PULL 00/14] Block patches, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 02/14] mirror: make sectors_in_flight int64_t, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 03/14] mirror: create mirror_throttle helper, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 04/14] mirror: create mirror_dirty_init helper for mirror_run,
Jeff Cody <=
- [Qemu-devel] [PULL 01/14] dirty-bitmap: operate with int64_t amount, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 05/14] block: remove extra condition in bdrv_can_write_zeroes_with_unmap, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 06/14] mirror: optimize dirty bitmap filling in mirror_run a bit, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 08/14] mirror: improve performance of mirroring of empty disk, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 07/14] mirror: efficiently zero out target, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 09/14] mirror: fix request throttling in drive-mirror, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 10/14] block/gluster: rename [server, volname, image] -> [host, volume, path], Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 11/14] block/gluster: code cleanup, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 12/14] block/gluster: deprecate rdma support, Jeff Cody, 2016/07/19
- [Qemu-devel] [PULL 14/14] block/gluster: add support for multiple gluster servers, Jeff Cody, 2016/07/19