diff options
Diffstat (limited to 'drivers/md/raid10.c')
| -rw-r--r-- | drivers/md/raid10.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index a52f43b151b5..72e52921c545 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -25,6 +25,7 @@ #include <linux/seq_file.h> #include <linux/ratelimit.h> #include <linux/kthread.h> +#include <linux/raid/md_p.h> #include <trace/events/block.h> #include "md.h" #include "raid10.h" @@ -4288,12 +4289,46 @@ static int raid10_start_reshape(struct mddev *mddev) spin_unlock_irq(&conf->device_lock); if (mddev->delta_disks && mddev->bitmap) { - ret = md_bitmap_resize(mddev->bitmap, - raid10_size(mddev, 0, conf->geo.raid_disks), - 0, 0); + struct mdp_superblock_1 *sb = NULL; + sector_t oldsize, newsize; + + oldsize = raid10_size(mddev, 0, 0); + newsize = raid10_size(mddev, 0, conf->geo.raid_disks); + + if (!mddev_is_clustered(mddev)) { + ret = md_bitmap_resize(mddev->bitmap, newsize, 0, 0); + if (ret) + goto abort; + else + goto out; + } + + rdev_for_each(rdev, mddev) { + if (rdev->raid_disk > -1 && + !test_bit(Faulty, &rdev->flags)) + sb = page_address(rdev->sb_page); + } + + /* + * some node is already performing reshape, and no need to + * call md_bitmap_resize again since it should be called when + * receiving BITMAP_RESIZE msg + */ + if ((sb && (le32_to_cpu(sb->feature_map) & + MD_FEATURE_RESHAPE_ACTIVE)) || (oldsize == newsize)) + goto out; + + ret = md_bitmap_resize(mddev->bitmap, newsize, 0, 0); if (ret) goto abort; + + ret = md_cluster_ops->resize_bitmaps(mddev, newsize, oldsize); + if (ret) { + md_bitmap_resize(mddev->bitmap, oldsize, 0, 0); + goto abort; + } } +out: if (mddev->delta_disks > 0) { rdev_for_each(rdev, mddev) if (rdev->raid_disk < 0 && |