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btrfs: Handle btrfs_set_extent_delalloc failure in fixup worker

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commit f3038ee3a3 upstream.

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.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nikolay Borisov
2017-12-05 09:29:19 +02:00
committed by Greg Kroah-Hartman
parent 3c83fe52b5
commit 8fe7ceaf8a
1 changed files with 9 additions and 2 deletions
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11
fs/btrfs/inode.c
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@@ -2063,8 +2063,15 @@ again:
goto out;
}
btrfs_set_extent_delalloc(inode, page_start, page_end, &cached_state,
0);
ret = btrfs_set_extent_delalloc(inode, page_start, page_end,
&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);
out: