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xfs: add some comments to xfs_iext_insert/xfs_iext_insert_node

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Reported-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2017-11-09 09:11:41 -08:00 committed by Darrick J. Wong
parent 43d193aa02
commit fc258f4b8b
1 changed files with 8 additions and 0 deletions
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8
fs/xfs/libxfs/xfs_iext_tree.c
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@ -525,6 +525,10 @@ again:
if (nr_entries == KEYS_PER_NODE)
new = xfs_iext_split_node(&node, &pos, &nr_entries);
/*
* Update the pointers in higher levels if the first entry changes
* in an existing node.
*/
if (node != new && pos == 0 && nr_entries > 0)
xfs_iext_update_node(ifp, node->keys[0], offset, level, node);
@ -643,6 +647,10 @@ xfs_iext_insert(
if (nr_entries == RECS_PER_LEAF)
new = xfs_iext_split_leaf(cur, &nr_entries);
/*
* Update the pointers in higher levels if the first entry changes
* in an existing node.
*/
if (cur->leaf != new && cur->pos == 0 && nr_entries > 0) {
xfs_iext_update_node(ifp, xfs_iext_leaf_key(cur->leaf, 0),
offset, 1, cur->leaf);