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Commit e9906a98 authored by Chris Mason's avatar Chris Mason
Browse files

Fixes for loopback files in btrfs 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 6e3b9666

fs/btrfs/file.c

+1 −0
Original line number Diff line number Diff line
@@ -861,6 +861,7 @@ struct file_operations btrfs_file_operations = { 
	.llseek		= generic_file_llseek,

	.read		= do_sync_read,

	.aio_read       = generic_file_aio_read,

	.splice_read	= generic_file_splice_read,

	.write		= btrfs_file_write,

	.mmap		= btrfs_file_mmap,

	.open		= generic_file_open,

fs/btrfs/inode.c

+13 −2
Original line number Diff line number Diff line
@@ -1893,8 +1893,19 @@ static void btrfs_truncate(struct inode *inode) 
int btrfs_commit_write(struct file *file, struct page *page,

		       unsigned from, unsigned to)

{

	return extent_commit_write(&BTRFS_I(page->mapping->host)->extent_tree,

				   page->mapping->host, page, from, to);

	loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;

	struct inode *inode = page->mapping->host;



	btrfs_cow_one_page(inode, page, PAGE_CACHE_SIZE);



	set_page_extent_mapped(page);

	set_page_dirty(page);



	if (pos > inode->i_size) {

		i_size_write(inode, pos);

		mark_inode_dirty(inode);

	}

	return 0;

}



static int create_subvol(struct btrfs_root *root, char *name, int namelen)