xfs: fix extent busy updating

mainline inclusion
from mainline-v6.2-rc4
commit 601a27ea
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4KIAO
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=601a27ea09a317d0fe2895df7d875381fb393041

--------------------------------

In xfs_extent_busy_update_extent() case 6 and 7, whenever bno is modified on
extent busy, the relavent length has to be modified accordingly.
Signed-off-by: NWengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: NDarrick J. Wong <djwong@kernel.org>
Signed-off-by: NDarrick J. Wong <djwong@kernel.org>
Signed-off-by: Nyangerkun <yangerkun@huaweicloud.com>
Reviewed-by: NZhang Yi <yi.zhang@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

fs/xfs/xfs_extent_busy.c

@@ -244,6 +244,7 @@ xfs_extent_busy_update_extent(
 		 *
 		 */
 		busyp->bno = fend;
+		busyp->length = bend - fend;
 	} else if (bbno < fbno) {
 		/*
 		 * Case 8: