tree eb680da99882ee209d775df4606831df68b9ead2
parent ff11309ecc24fae663a4d65947b24c371a04a5c7
author Darrick J. Wong <darrick.wong@oracle.com> 1406334844 -0700
committer Theodore Ts'o <tytso@mit.edu> 1406406461 -0400

e2fsck: fix rule-violating lblk->pblk mappings on bigalloc filesystems

As far as I can tell, logical block mappings on a bigalloc filesystem are
supposed to follow a few constraints:

 * The logical cluster offset must match the physical cluster offset.
 * A logical cluster may not map to multiple physical clusters.

Since the multiply-claimed block recovery code can be used to fix these
problems, teach e2fsck to find these transgressions and fix them.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>