tree 74e9498c0cb0f42a3158d0a892181316e5a8a243
parent 1ad3ea6e0a694b0486eb2cbe60378ad0fbf23642
author Theodore Ts'o <tytso@mit.edu> 1565555561 -0400
committer Theodore Ts'o <tytso@mit.edu> 1565555561 -0400

ext4: add new ioctl EXT4_IOC_GET_ES_CACHE

For debugging reasons, it's useful to know the contents of the extent
cache.  Since the extent cache contains much of what is in the fiemap
ioctl, use an fiemap-style interface to return this information.

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