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btrfs: Handle btrfs_set_extent_delalloc failure in fixup worker 

This function was introduced by 247e743cbe ("Btrfs: Use async helpers
to deal with pages that have been improperly dirtied") and it didn't do
any error handling then. This function might very well fail in ENOMEM
situation, yet it's not handled, this could lead to inconsistent state.
So let's handle the failure by setting the mapping error bit.

Cc: stable@vger.kernel.org
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2017-12-05 09:29:19 +02:00 committed by David Sterba
parent ad8bc4d005
commit f3038ee3a3
1 changed files with 9 additions and 2 deletions
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11
fs/btrfs/inode.c
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@ -2116,8 +2116,15 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work)
goto out;
}
btrfs_set_extent_delalloc(inode, page_start, page_end, 0, &cached_state,
0);
ret = btrfs_set_extent_delalloc(inode, page_start, page_end, 0,
&cached_state, 0);
if (ret) {
mapping_set_error(page->mapping, ret);
end_extent_writepage(page, ret, page_start, page_end);
ClearPageChecked(page);
goto out;
}
ClearPageChecked(page);
set_page_dirty(page);
btrfs_delalloc_release_extents(BTRFS_I(inode), PAGE_SIZE);