[v15,10/42] btrfs: zoned: verify device extent is aligned to zone

Commit Message

Naohiro Aota Feb. 4, 2021, 10:21 a.m. UTC

Add a check in verify_one_dev_extent() to ensure that a device extent on a
zoned block device is aligned to the respective zone boundary.

If it isn't mark the filesystem as unclean.

Reviewed-by: Anand Jain <[e-mail]>
Reviewed-by: Josef Bacik <[e-mail]>
Signed-off-by: Naohiro Aota <[e-mail]>
Reviewed-by: David Sterba <[e-mail]>
---
 fs/btrfs/volumes.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Patch

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ae2aeadad5a0..10401def16ef 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -7769,6 +7769,20 @@  static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
 		ret = -EUCLEAN;
 		goto out;
 	}
+
+	if (dev->zone_info) {
+		u64 zone_size = dev->zone_info->zone_size;
+
+		if (!IS_ALIGNED(physical_offset, zone_size) ||
+		    !IS_ALIGNED(physical_len, zone_size)) {
+			btrfs_err(fs_info,
+"zoned: dev extent devid %llu physical offset %llu len %llu is not aligned to device zone",
+				  devid, physical_offset, physical_len);
+			ret = -EUCLEAN;
+			goto out;
+		}
+	}
+
 out:
 	free_extent_map(em);
 	return ret;