MFC r318926: MFV r316919: 7885 zpool list can report 16.0e for expandsz
FreeBSD note: this is a record-only change, the actual change was
directly committed by smh.
illumos/illumos-gate@c040c10cdd1e4eab0fc88203758367dd81e057b7
https://github.com/illumos/illumos-gate/commit/c040c10cdd1e4eab0fc88203758367dd81e057b7
https://www.illumos.org/issues/7885
When a member of a RAIDZ has been replaced with a device smaller than the original, then the top level vdev can report its expand size as 16.0E. The reduced child asize causes the RAIDZ to have a vdev_asize lower than its vdev_max_asize which then results in an underflow during the calculation of the parents expand size. Also for RAIDZ vdevs the sum of their child vdev_min_asize could be smaller than the parents vdev_min_size. Fixed by: https://github.com/openzfs/openzfs/pull/296
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Gordon Ross <gordon.w.ross@gmail.com>
Author: Steven Hartland <steven.hartland@multiplay.co.uk>