From: Yu Kuai <yukuai3@xxxxxxxxxx>
Include following APIs:
- llbitmap_blocks_synced
- llbitmap_skip_sync_blocks
- llbitmap_start_sync
- llbitmap_end_sync
- llbitmap_close_sync
- llbitmap_cond_end_sync
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md-llbitmap.c | 104 +++++++++++++++++++++++++++++++++++++++
1 file changed, 104 insertions(+)
diff --git a/drivers/md/md-llbitmap.c b/drivers/md/md-llbitmap.c
index 37e72885dbdb..1b7625d3e2ed 100644
--- a/drivers/md/md-llbitmap.c
+++ b/drivers/md/md-llbitmap.c
@@ -1173,4 +1173,108 @@ static void llbitmap_flush(struct mddev *mddev)
__llbitmap_flush(mddev);
}
+/* This is used for raid5 lazy initial recovery */
+static bool llbitmap_blocks_synced(struct mddev *mddev, sector_t offset)
+{
+ struct llbitmap *llbitmap = mddev->bitmap;
+ unsigned long p = offset >> llbitmap->chunkshift;
+ enum llbitmap_state c = llbitmap_read(llbitmap, p);
+
+ return c == BitClean || c == BitDirty;
+}
+
+static sector_t llbitmap_skip_sync_blocks(struct mddev *mddev, sector_t offset)
+{
+ struct llbitmap *llbitmap = mddev->bitmap;
+ unsigned long p = offset >> llbitmap->chunkshift;
+ int blocks = llbitmap->chunksize - (offset & (llbitmap->chunksize - 1));
+ enum llbitmap_state c = llbitmap_read(llbitmap, p);
+
+ /* always skip unwritten blocks */
+ if (c == BitUnwritten)
+ return blocks;
+
+ /* For resync also skip clean/dirty blocks */
+ if ((c == BitClean || c == BitDirty) &&
+ test_bit(MD_RECOVERY_SYNC, &mddev->recovery) &&
+ !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
+ return blocks;
+
+ return 0;
+}
+
+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;
+}
+
+/* Something is wrong, sync_thread stop at @offset */
+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);
+}
+
+/* A full sync_thread is finished */
+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_page_ctl *pctl = llbitmap->pctl[i];
+
+ /* let daemon_fn clear dirty bits immediately */
+ WRITE_ONCE(pctl->expire, jiffies);
+ }
+
+ llbitmap_state_machine(llbitmap, 0, llbitmap->chunks - 1,
+ BitmapActionEndsync);
+}
+
+/*
+ * sync_thread have reached @sector, update metadata every daemon_sleep seconds,
+ * just in case sync_thread have to restart after power failure.
+ */
+static void llbitmap_cond_end_sync(struct mddev *mddev, sector_t sector,
+ bool force)
+{
+ struct llbitmap *llbitmap = mddev->bitmap;
+
+ if (sector == 0) {
+ llbitmap->last_end_sync = jiffies;
+ return;
+ }
+
+ if (time_before(jiffies, llbitmap->last_end_sync +
+ HZ * mddev->bitmap_info.daemon_sleep))
+ return;
+
+ wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active));
+
+ mddev->curr_resync_completed = sector;
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
+ llbitmap_state_machine(llbitmap, 0, sector >> llbitmap->chunkshift,
+ BitmapActionEndsync);
+ __llbitmap_flush(mddev);
+
+ llbitmap->last_end_sync = jiffies;
+ sysfs_notify_dirent_safe(mddev->sysfs_completed);
+}
+
#endif /* CONFIG_MD_LLBITMAP */
--
2.39.2
