Commit e9906a98 authored by Chris Mason's avatar Chris Mason

Fixes for loopback files in btrfs

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