Commit 32430c61 authored by Naohiro Aota's avatar Naohiro Aota Committed by David Sterba
Browse files

btrfs: zoned: enable relocation on a zoned filesystem 



Currently fallocate() is disabled on a zoned filesystem. Since current
relocation process relies on preallocation to move file data extents, it
must be handled differently.

On a zoned filesystem, we just truncate the inode to the size that we
wanted to pre-allocate. Then, we flush dirty pages on the file before
finishing the relocation process. run_delalloc_zoned() will handle all
the allocations and submit IOs to the underlying layers.

Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarNaohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 7db1c5d1

fs/btrfs/relocation.c

+32 −2
Original line number Diff line number Diff line
@@ -2553,6 +2553,31 @@ static noinline_for_stack int prealloc_file_extent_cluster( 
	if (ret)

		return ret;



	/*

	 * On a zoned filesystem, we cannot preallocate the file region.

	 * Instead, we dirty and fiemap_write the region.

	 */

	if (btrfs_is_zoned(inode->root->fs_info)) {

		struct btrfs_root *root = inode->root;

		struct btrfs_trans_handle *trans;



		end = cluster->end - offset + 1;

		trans = btrfs_start_transaction(root, 1);

		if (IS_ERR(trans))

			return PTR_ERR(trans);



		inode->vfs_inode.i_ctime = current_time(&inode->vfs_inode);

		i_size_write(&inode->vfs_inode, end);

		ret = btrfs_update_inode(trans, root, inode);

		if (ret) {

			btrfs_abort_transaction(trans, ret);

			btrfs_end_transaction(trans);

			return ret;

		}



		return btrfs_end_transaction(trans);

	}



	inode_lock(&inode->vfs_inode);

	for (nr = 0; nr < cluster->nr; nr++) {

		start = cluster->boundary[nr] - offset;
@@ -2756,6 +2781,8 @@ static int relocate_file_extent_cluster(struct inode *inode, 
		}

	}

	WARN_ON(nr != cluster->nr);

	if (btrfs_is_zoned(fs_info) && !ret)

		ret = btrfs_wait_ordered_range(inode, 0, (u64)-1);

out:

	kfree(ra);

	return ret;
@@ -3434,8 +3461,12 @@ static int __insert_orphan_inode(struct btrfs_trans_handle *trans, 
	struct btrfs_path *path;

	struct btrfs_inode_item *item;

	struct extent_buffer *leaf;

	u64 flags = BTRFS_INODE_NOCOMPRESS | BTRFS_INODE_PREALLOC;

	int ret;



	if (btrfs_is_zoned(trans->fs_info))

		flags &= ~BTRFS_INODE_PREALLOC;



	path = btrfs_alloc_path();

	if (!path)

		return -ENOMEM;
@@ -3450,8 +3481,7 @@ static int __insert_orphan_inode(struct btrfs_trans_handle *trans, 
	btrfs_set_inode_generation(leaf, item, 1);

	btrfs_set_inode_size(leaf, item, 0);

	btrfs_set_inode_mode(leaf, item, S_IFREG | 0600);

	btrfs_set_inode_flags(leaf, item, BTRFS_INODE_NOCOMPRESS |

					  BTRFS_INODE_PREALLOC);

	btrfs_set_inode_flags(leaf, item, flags);

	btrfs_mark_buffer_dirty(leaf);

out:

	btrfs_free_path(path);