From: Yu Kuai <yukuai3@xxxxxxxxxx>
This method is used to check if blocks can be skipped before calling
into pers->sync_request(), llbitmap will use this method to skip
resync for unwritten/clean data blocks, and recovery/check/repair for
unwritten data blocks;
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Xiao Ni <xni@xxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Reviewed-by: Li Nan <linan122@xxxxxxxxxx>
---
drivers/md/md-bitmap.h | 1 +
drivers/md/md.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index 8616ced49077..95453696c68e 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -89,6 +89,7 @@ struct bitmap_operations {
md_bitmap_fn *start_discard;
md_bitmap_fn *end_discard;
+ sector_t (*skip_sync_blocks)(struct mddev *mddev, sector_t offset);
bool (*start_sync)(struct mddev *mddev, sector_t offset,
sector_t *blocks, bool degraded);
void (*end_sync)(struct mddev *mddev, sector_t offset, sector_t *blocks);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 6560bd89d0a2..7196e7f6b2a4 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -9460,6 +9460,12 @@ void md_do_sync(struct md_thread *thread)
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
+ if (mddev->bitmap_ops && mddev->bitmap_ops->skip_sync_blocks) {
+ sectors = mddev->bitmap_ops->skip_sync_blocks(mddev, j);
+ if (sectors)
+ goto update;
+ }
+
sectors = mddev->pers->sync_request(mddev, j, max_sectors,
&skipped);
if (sectors == 0) {
@@ -9475,6 +9481,7 @@ void md_do_sync(struct md_thread *thread)
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
+update:
j += sectors;
if (j > max_sectors)
/* when skipping, extra large numbers can be returned. */
--
2.39.2
