From: Yu Kuai <yukuai3@xxxxxxxxxx>
Include following APIs:
- llbitmap_start_sync
- llbitmap_end_sync
- llbitmap_close_sync
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md-llbitmap.c | 43 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/drivers/md/md-llbitmap.c b/drivers/md/md-llbitmap.c
index 982ec868ce22..1692942942ff 100644
--- a/drivers/md/md-llbitmap.c
+++ b/drivers/md/md-llbitmap.c
@@ -1071,6 +1071,45 @@ static void llbitmap_flush(struct mddev *mddev)
flush_work(&llbitmap->daemon_work);
}
+static bool llbitmap_start_sync(struct mddev *mddev, sector_t offset,
+ sector_t *blocks, bool degraded)
+{
+ struct llbitmap *llbitmap = mddev->bitmap;
+ unsigned long p = offset >> llbitmap->chunkshift;
+
+ /*
+ * Handle one bit at a time, this is much simpler. And it doesn't matter
+ * if md_do_sync() loop more times.
+ */
+ *blocks = llbitmap->chunksize - (offset & (llbitmap->chunksize - 1));
+ return llbitmap_state_machine(llbitmap, p, p, BitmapActionStartsync) == BitSyncing;
+}
+
+static void llbitmap_end_sync(struct mddev *mddev, sector_t offset,
+ sector_t *blocks)
+{
+ struct llbitmap *llbitmap = mddev->bitmap;
+ unsigned long p = offset >> llbitmap->chunkshift;
+
+ *blocks = llbitmap->chunksize - (offset & (llbitmap->chunksize - 1));
+ llbitmap_state_machine(llbitmap, p, llbitmap->chunks - 1, BitmapActionAbortsync);
+}
+
+static void llbitmap_close_sync(struct mddev *mddev)
+{
+ struct llbitmap *llbitmap = mddev->bitmap;
+ int i;
+
+ for (i = 0; i < llbitmap->nr_pages; i++) {
+ struct llbitmap_barrier *barrier = &llbitmap->barrier[i];
+
+ /* let daemon_fn clear dirty bits immediately */
+ WRITE_ONCE(barrier->expire, jiffies);
+ }
+
+ llbitmap_state_machine(llbitmap, 0, llbitmap->chunks - 1, BitmapActionEndsync);
+}
+
static struct bitmap_operations llbitmap_ops = {
.head = {
.type = MD_BITMAP,
@@ -1087,4 +1126,8 @@ static struct bitmap_operations llbitmap_ops = {
.endwrite = llbitmap_endwrite,
.unplug = llbitmap_unplug,
.flush = llbitmap_flush,
+
+ .start_sync = llbitmap_start_sync,
+ .end_sync = llbitmap_end_sync,
+ .close_sync = llbitmap_close_sync,
};
--
2.39.2
