Commit beb42dd7 authored May 30, 2012 by Josef Bacik Committed by Chris Mason Jun 14, 2012

Btrfs: pass locked_page into extent_clear_unlock_delalloc if theres an error



While doing my enospc work I got a transaction abortion that resulted in a
panic when we tried to unlock_page() an already unlocked page.  This is
because we aren't calling extent_clear_unlock_delalloc with the locked page
so it was unlocking all the pages in the range.  This is wrong since
__extent_writepage expects to have the page locked still unless we return
*page_started as 1.  This should keep us from panicing.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

parent 1e20932a

fs/btrfs/inode.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -830,7 +830,7 @@ static noinline int cow_file_range(struct inode *inode,
		if (IS_ERR(trans)) {
		extent_clear_unlock_delalloc(inode,
		&BTRFS_I(inode)->io_tree,
		start, end, NULL,
		start, end, locked_page,
		EXTENT_CLEAR_UNLOCK_PAGE \|
		EXTENT_CLEAR_UNLOCK \|
		EXTENT_CLEAR_DELALLOC \|
		@@ -963,7 +963,7 @@ static noinline int cow_file_range(struct inode *inode,
		out_unlock:
		extent_clear_unlock_delalloc(inode,
		&BTRFS_I(inode)->io_tree,
		start, end, NULL,
		start, end, locked_page,
		EXTENT_CLEAR_UNLOCK_PAGE \|
		EXTENT_CLEAR_UNLOCK \|
		EXTENT_CLEAR_DELALLOC \|