diff options
| author | Guoqing Jiang <gqjiang@suse.com> | 2018-10-18 16:37:41 +0800 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2018-10-18 09:30:58 -0700 |
| commit | afd75628608337cf427a1f9ca0e46698a74f25d8 (patch) | |
| tree | d778927816adb10c796ed609ba93a5736e6c7b44 /drivers/md/raid10.c | |
| parent | 9e753ba9b9b405e3902d9f08aec5f2ea58a0c317 (diff) | |
md-cluster/raid10: resize all the bitmaps before start reshape
To support add disk under grow mode, we need to resize
all the bitmaps of each node before reshape, so that we
can ensure all nodes have the same view of the bitmap of
the clustered raid.
So after the master node resized the bitmap, it broadcast
a message to other slave nodes, and it checks the size of
each bitmap are same or not by compare pages. We can only
continue the reshaping after all nodes update the bitmap
to the same size (by checking the pages), otherwise revert
bitmap size to previous value.
The resize_bitmaps interface and BITMAP_RESIZE message are
introduced in md-cluster.c for the purpose.
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
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 && |