Commit 0da5468f authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: Use writepages for the metadata too 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 008630c1

fs/btrfs/disk-io.c

+26 −3
Original line number Diff line number Diff line
@@ -43,6 +43,8 @@ static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf) 
}

#endif



static struct extent_map_ops btree_extent_map_ops;



struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,

					    u64 bytenr, u32 blocksize)

{
@@ -188,15 +190,29 @@ int csum_dirty_buffer(struct btrfs_root *root, struct page *page) 
	return 0;

}



static int btree_writepage(struct page *page, struct writeback_control *wbc)

static int btree_writepage_io_hook(struct page *page, u64 start, u64 end)

{

	struct extent_map_tree *tree;

	struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;

	tree = &BTRFS_I(page->mapping->host)->extent_tree;



	csum_dirty_buffer(root, page);

	return 0;

}



static int btree_writepage(struct page *page, struct writeback_control *wbc)

{

	struct extent_map_tree *tree;

	tree = &BTRFS_I(page->mapping->host)->extent_tree;

	return extent_write_full_page(tree, page, btree_get_extent, wbc);

}



static int btree_writepages(struct address_space *mapping,

			    struct writeback_control *wbc)

{

	struct extent_map_tree *tree;

	tree = &BTRFS_I(mapping->host)->extent_tree;

	return extent_writepages(tree, mapping, btree_get_extent, wbc);

}



int btree_readpage(struct file *file, struct page *page)

{

	struct extent_map_tree *tree;
@@ -251,6 +267,7 @@ static int btree_writepage(struct page *page, struct writeback_control *wbc) 
static struct address_space_operations btree_aops = {

	.readpage	= btree_readpage,

	.writepage	= btree_writepage,

	.writepages	= btree_writepages,

	.releasepage	= btree_releasepage,

	.invalidatepage = btree_invalidatepage,

	.sync_page	= block_sync_page,
@@ -538,6 +555,8 @@ struct btrfs_root *open_ctree(struct super_block *sb) 
	extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree,

			     fs_info->btree_inode->i_mapping,

			     GFP_NOFS);

	BTRFS_I(fs_info->btree_inode)->extent_tree.ops = &btree_extent_map_ops;



	extent_map_tree_init(&fs_info->free_space_cache,

			     fs_info->btree_inode->i_mapping, GFP_NOFS);

	extent_map_tree_init(&fs_info->block_group_cache,
@@ -832,3 +851,7 @@ int btrfs_read_buffer(struct extent_buffer *buf) 
	return read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree,

					buf, 0, 1);

}



static struct extent_map_ops btree_extent_map_ops = {

	.writepage_io_hook = btree_writepage_io_hook,

};