tree 5d2275dfe2093c07c2a4715b0b1b498f9a225644
parent 789bd401c3bce85d3c2ae4504ca62509aa0a8b88
author Theodore Ts'o <tytso@mit.edu> 1356046053 -0500
committer Theodore Ts'o <tytso@mit.edu> 1356046053 -0500

libext2fs: ext2fs_extents_fix_parents() should not modify the handle location

Previously, ext2fs_extent_fix_parents() would only avoid modifying the
cursor location associated with the extent handle the cursor was
pointed at a leaf node in the extent tree.  This is because it saved
the starting logical block number of the current extent, but not the
"level" of the extent (where level 0 is the leaf node, level 1 is the
interior node which points at blocks containing leaf nodes, etc.)

Fix ext2fs_extent_fix_parents() so it is guaranteed to not change the
current extent in the handle even if the current extent is not at the
bottom of the tree.

Also add a fix_extent command to the tst_extents program to make it
easier to test this function.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>