linux-ext4 - Re: [PATCH e2fsprogs] delete unused nodes in ext2fs_extent

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Message-ID: <20080531041906.GF3380@mit.edu>
Date:	Sat, 31 May 2008 00:19:06 -0400
From:	Theodore Tso <tytso@....edu>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH e2fsprogs] delete unused nodes in ext2fs_extent_delete

One more addition.  If we delete the last entry in the root inode, we
need to set the depth of the tree to 0.

					- Ted

diff --git a/lib/ext2fs/extent.c b/lib/ext2fs/extent.c
index 19d7feb..65b2003 100644
--- a/lib/ext2fs/extent.c
+++ b/lib/ext2fs/extent.c
@@ -1248,7 +1248,8 @@ errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags)
 	} else {
 		eh = (struct ext3_extent_header *) path->buf;
 		eh->eh_entries = ext2fs_cpu_to_le16(path->entries);
-
+		if ((path->entries == 0) && (handle->level == 0))
+			eh->eh_depth = handle->max_depth = 0;
 		retval = update_path(handle);
 	}
 	return retval;


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