linux-kernel - [PATCH 6.7 051/713] btrfs: zoned: don't skip block group profile checks on conventional zones

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Date: Sun, 24 Mar 2024 18:36:17 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Johannes Thumshirn <johannes.thumshirn@....com>,
	HAN Yuwei <hrx@...t.moe>,
	Boris Burkov <boris@....io>,
	Naohiro Aota <naohiro.aota@....com>,
	David Sterba <dsterba@...e.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.7 051/713] btrfs: zoned: don't skip block group profile checks on conventional zones

From: Johannes Thumshirn <johannes.thumshirn@....com>

[ Upstream commit 5906333cc4af7b3fdb8cfff1cb3e8e579bd13174 ]

On a zoned filesystem with conventional zones, we're skipping the block
group profile checks for the conventional zones.

This allows converting a zoned filesystem's data block groups to RAID when
all of the zones backing the chunk are on conventional zones.  But this
will lead to problems, once we're trying to allocate chunks backed by
sequential zones.

So also check for conventional zones when loading a block group's profile
on them.

Reported-by: HAN Yuwei <hrx@...t.moe>
Link: https://lore.kernel.org/all/1ACD2E3643008A17+da260584-2c7f-432a-9e22-9d390aae84cc@bupt.moe/#t
Reviewed-by: Boris Burkov <boris@....io>
Reviewed-by: Naohiro Aota <naohiro.aota@....com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
Reviewed-by: David Sterba <dsterba@...e.com>
Signed-off-by: David Sterba <dsterba@...e.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/btrfs/zoned.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 3779e76a15d64..524532f992746 100644
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -1661,6 +1661,15 @@ int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new)
 	}
 
 out:
+	/* Reject non SINGLE data profiles without RST */
+	if ((map->type & BTRFS_BLOCK_GROUP_DATA) &&
+	    (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) &&
+	    !fs_info->stripe_root) {
+		btrfs_err(fs_info, "zoned: data %s needs raid-stripe-tree",
+			  btrfs_bg_type_to_raid_name(map->type));
+		return -EINVAL;
+	}
+
 	if (cache->alloc_offset > cache->zone_capacity) {
 		btrfs_err(fs_info,
 "zoned: invalid write pointer %llu (larger than zone capacity %llu) in block group %llu",
-- 
2.43.0