[RFC PATCH v4 27/34] ext4: implement zero_range iomap path

Zhang Yi
2024-04-10T14:38:46Z

Add ext4_iomap_zero_range() for the zero_range iomap path, it zero out
the mapped blocks, all work have been done in iomap_zero_range(), so
call it directly.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
fs/ext4/inode.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9d694c780007..5af3b8acf1b9 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4144,6 +4144,13 @@ static int __ext4_block_zero_page_range(handle_t *handle,
return err;
}

+static int ext4_iomap_zero_range(struct inode *inode,
+ loff_t from, loff_t length)
+{
+ return iomap_zero_range(inode, from, length, NULL,
+ &ext4_iomap_buffered_read_ops);
+}
+
/*
* ext4_block_zero_page_range() zeros out a mapping of length 'length'
* starting from file offset 'from'. The range to be zero'd must
@@ -4169,6 +4176,8 @@ static int ext4_block_zero_page_range(handle_t *handle,
if (IS_DAX(inode)) {
return dax_zero_range(inode, from, length, NULL,
&ext4_iomap_ops);
+ } else if (ext4_test_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP)) {
+ return ext4_iomap_zero_range(inode, from, length);
}
return __ext4_block_zero_page_range(handle, mapping, from, length);
}
--
2.39.2