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[22/27] ext4: disable online defrag when inode using iomap buffered I/O path

Message ID 20241022111059.2566137-23-yi.zhang@huaweicloud.com
State New
Headers show
Series ext4: use iomap for regular file's buffered I/O path and enable large folio | expand

Commit Message

Zhang Yi Oct. 22, 2024, 11:10 a.m. UTC 
From: Zhang Yi <yi.zhang@huawei.com>

Online defragmentation does not yet support the inode using iomap
buffered I/O path, as it still relies on ext4_get_block() to get blocks
and copy data. Therefore, we must disable it for the time being.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 fs/ext4/move_extent.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index b64661ea6e0e..508e342b4a1d 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -610,6 +610,13 @@  ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
 		return -EOPNOTSUPP;
 	}
 
+	if (ext4_test_inode_state(orig_inode, EXT4_STATE_BUFFERED_IOMAP) ||
+	    ext4_test_inode_state(donor_inode, EXT4_STATE_BUFFERED_IOMAP)) {
+		ext4_msg(orig_inode->i_sb, KERN_ERR,
+			 "Online defrag not supported for inode with iomap buffered IO path");
+		return -EOPNOTSUPP;
+	}
+
 	/* Protect orig and donor inodes against a truncate */
 	lock_two_nondirectories(orig_inode, donor_inode);