From: Heinz Mauelshagen <heinzm@xxxxxxxxxx>
Check all component data device sizes versus calculated size.
Reject in case device(s) are too small.
---
drivers/md/dm-raid.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 5c08729ccc22..18ddd55d7edb 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -1581,6 +1581,24 @@ static sector_t __rdev_sectors(struct raid_set *rs)
return 0;
}
+/* Check that calculated dev_sectors fits all component devices. */
+static int _check_data_dev_sectors(struct raid_set *rs)
+{
+ sector_t ds = ~0;
+ struct md_rdev *rdev;
+
+ rdev_for_each(rdev, &rs->md)
+ if (!test_bit(Journal, &rdev->flags) && rdev->bdev) {
+ ds = min(ds, to_sector(i_size_read(rdev->bdev->bd_inode)));
+ if (ds < rs->md.dev_sectors) {
+ rs->ti->error = "Component device(s) too small";
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
/* Calculate the sectors per device and per array used for @rs */
static int rs_set_dev_and_array_sectors(struct raid_set *rs, bool use_mddev)
{
@@ -1630,7 +1648,7 @@ static int rs_set_dev_and_array_sectors(struct raid_set *rs, bool use_mddev)
mddev->array_sectors = array_sectors;
mddev->dev_sectors = dev_sectors;
- return 0;
+ return _check_data_dev_sectors(rs);
bad:
rs->ti->error = "Target length not divisible by number of data devices";
return -EINVAL;
--
2.13.6
--
dm-devel mailing list
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
