linux-kernel - [PATCH v3 05/14] btrfs: fix tail delete of RAID stripe-extents

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Message-Id: <20250109-rst-delete-fixes-v3-5-b5c73a4b2a80@kernel.org>
Date: Thu, 09 Jan 2025 16:15:06 +0100
From: Johannes Thumshirn <jth@...nel.org>
To: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, 
 David Sterba <dsterba@...e.com>
Cc: Filipe Manana <fdmanana@...e.com>, linux-btrfs@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH v3 05/14] btrfs: fix tail delete of RAID stripe-extents

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

Fix tail delete of RAID stripe-extents, if there is a range to be deleted
as well after the tail delete of the extent.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
Reviewed-by: Filipe Manana <fdmanana@...e.com>
---
 fs/btrfs/raid-stripe-tree.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/raid-stripe-tree.c b/fs/btrfs/raid-stripe-tree.c
index 9e559ad48810b704c997ff5e51222aced0b91637..ef76202c3a38460c5a36d7309ac0a616f73b0cc0 100644
--- a/fs/btrfs/raid-stripe-tree.c
+++ b/fs/btrfs/raid-stripe-tree.c
@@ -119,11 +119,18 @@ int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 le
 		 * length to the new size and then re-insert the item.
 		 */
 		if (found_start < start) {
-			u64 diff = start - found_start;
+			u64 diff_start = start - found_start;
 
 			btrfs_partially_delete_raid_extent(trans, path, &key,
-							   diff, 0);
-			break;
+							   diff_start, 0);
+
+			start += (key.offset - diff_start);
+			length -= (key.offset - diff_start);
+			if (length == 0)
+				break;
+
+			btrfs_release_path(path);
+			continue;
 		}
 
 		/*

-- 
2.43.0