[PATCH v3 5/8] md: don't allow resize/reshape with cache support
From: Shaohua Li <hidden>
Date: 2015-06-03 22:48:40
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
If cache support is enabled, don't allow resize/reshape in current stage. In the future, we can flush all data from cache to raid before resize/reshape and then allow resize/reshape. Signed-off-by: Shaohua Li <redacted> --- drivers/md/raid5.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 26561d8..29f49c7 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c@@ -7207,6 +7207,10 @@ static int raid5_resize(struct mddev *mddev, sector_t sectors) * worth it. */ sector_t newsize; + struct r5conf *conf = mddev->private; + + if (conf->cache) + return -EINVAL; sectors &= ~((sector_t)mddev->chunk_sectors - 1); newsize = raid5_size(mddev, sectors, mddev->raid_disks); if (mddev->external_size &&
@@ -7258,6 +7262,8 @@ static int check_reshape(struct mddev *mddev) { struct r5conf *conf = mddev->private; + if (conf->cache) + return -EINVAL; if (mddev->delta_disks == 0 && mddev->new_layout == mddev->layout && mddev->new_chunk_sectors == mddev->chunk_sectors)
--
1.8.1