Merge tag 'md-6.11-20240612' of git://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-6.11/block

Pull MD updates from Song:

"The major changes in this PR are:

 - sync_action fix and refactoring, by Yu Kuai;
 - Various small fixes by Christoph Hellwig, Li Nan, and Ofir Gal."

* tag 'md-6.11-20240612' of git://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md/raid5: avoid BUG_ON() while continue reshape after reassembling
  md: pass in max_sectors for pers->sync_request()
  md: factor out helpers for different sync_action in md_do_sync()
  md: replace last_sync_action with new enum type
  md: use new helpers in md_do_sync()
  md: don't fail action_store() if sync_thread is not registered
  md: remove parameter check_seq for stop_sync_thread()
  md: replace sysfs api sync_action with new helpers
  md: factor out helper to start reshape from action_store()
  md: add new helpers for sync_action
  md: add a new enum type sync_action
  md: rearrange recovery_flags
  md/md-bitmap: fix writing non bitmap pages
  md/raid1: don't free conf on raid0_run failure
  md/raid0: don't free conf on raid0_run failure
  md: make md_flush_request() more readable
  md: fix deadlock between mddev_suspend and flush bio
  md: change the return value type of md_write_start to void
  md: do not delete safemode_timer in mddev_suspend

Author: axboe

drivers/md/dm-raid.c

@@ -3542,7 +3542,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
 		recovery = rs->md.recovery;
 		state = decipher_sync_action(mddev, recovery);
 		progress = rs_get_progress(rs, recovery, state, resync_max_sectors);
-		resync_mismatches = (mddev->last_sync_action && !strcasecmp(mddev->last_sync_action, "check")) ?
+		resync_mismatches = mddev->last_sync_action == ACTION_CHECK ?
 				    atomic64_read(&mddev->resync_mismatches) : 0;
 
 		/* HM FIXME: do we want another state char for raid0? It shows 'D'/'A'/'-' now */

drivers/md/md-bitmap.c

@@ -227,6 +227,8 @@ static int __write_sb_page(struct md_rdev *rdev, struct bitmap *bitmap,
 	struct block_device *bdev;
 	struct mddev *mddev = bitmap->mddev;
 	struct bitmap_storage *store = &bitmap->storage;
+	unsigned int bitmap_limit = (bitmap->storage.file_pages - pg_index) <<
+		PAGE_SHIFT;
 	loff_t sboff, offset = mddev->bitmap_info.offset;
 	sector_t ps = pg_index * PAGE_SIZE / SECTOR_SIZE;
 	unsigned int size = PAGE_SIZE;
@@ -269,11 +271,9 @@ static int __write_sb_page(struct md_rdev *rdev, struct bitmap *bitmap,
 		if (size == 0)
 			/* bitmap runs in to data */
 			return -EINVAL;
-	} else {
-		/* DATA METADATA BITMAP - no problems */
 	}
 
-	md_super_write(mddev, rdev, sboff + ps, (int) size, page);
+	md_super_write(mddev, rdev, sboff + ps, (int)min(size, bitmap_limit), page);
 	return 0;
 }