Btrfs: Don't allow releasepage to succeed if EXTENT_ORDERED is set (211f90e6) · Commits · e / devices / android_kernel_teracube_emerald

fs/btrfs/extent_io.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2542,7 +2542,8 @@ int try_release_extent_state(struct extent_map_tree *map,
		u64 end = start + PAGE_CACHE_SIZE - 1;
		int ret = 1;

		if (test_range_bit(tree, start, end, EXTENT_IOBITS, 0))
		if (test_range_bit(tree, start, end,
		EXTENT_IOBITS \| EXTENT_ORDERED, 0))
		ret = 0;
		else {
		if ((mask & GFP_NOFS) == GFP_NOFS)

+9 −5

Original line number	Diff line number	Diff line
		@@ -477,10 +477,8 @@ printk("queueing worker to fixup page %lu %Lu\n", inode->i_ino, page_offset(page
		return -EAGAIN;
		}

		int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
		struct extent_state *state, int uptodate)
		static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
		{
		struct inode *inode = page->mapping->host;
		struct btrfs_root *root = BTRFS_I(inode)->root;
		struct btrfs_trans_handle *trans;
		struct btrfs_ordered_extent *ordered_extent;
		@@ -550,6 +548,12 @@ int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
		return 0;
		}

		int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
		struct extent_state *state, int uptodate)
		{
		return btrfs_finish_ordered_io(page->mapping->host, start, end);
		}

		int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
		{
		int ret = 0;
		@@ -2663,8 +2667,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset)
		clear_extent_bit(tree, page_start, page_end,
		EXTENT_DIRTY \| EXTENT_DELALLOC \|
		EXTENT_LOCKED, 1, 0, GFP_NOFS);
		btrfs_writepage_end_io_hook(page, page_start,
		page_end, NULL, 1);
		btrfs_finish_ordered_io(page->mapping->host,
		page_start, page_end);
		btrfs_put_ordered_extent(ordered);
		lock_extent(tree, page_start, page_end, GFP_NOFS);
		}