[PATCH v1 0/3] pNFS blocklayout handling for transient devices

[Benjamin Coddington <bcodding@redhat.com>]

This set improves the blocklayoutdriver's handling of layouts when devices
are not present on the a client, or become unavailable.  Ideally, clients
should not continually spam a server with LAYOUTGET for known layouts, and
GETDEVINFO for known devices, since it may be a common scenario to have some
clients that have access to the block devices, and some clients that do not.

In addition to better handling situations where devices are unavailable,
patches 2 and 3 fix crashes if SCSI devices do not exist or are already have
existing reservations.

Benjamin Coddington (3):
  pnfs/blocklayout: set PNFS_LAYOUTRETURN_ON_ERROR
  pnfs/blocklayout: Revalidate SCSI disks after registration
  pnfs/blocklayout: handle transient devices

 fs/nfs/blocklayout/blocklayout.c | 84 +++++++++++++++++++++++++++++++++++++---
 fs/nfs/blocklayout/dev.c         | 15 ++++---
 fs/nfs/pnfs.c                    |  2 +-
 fs/nfs/pnfs.h                    |  6 ++-
 fs/nfs/pnfs_dev.c                |  1 -
 5 files changed, 94 insertions(+), 14 deletions(-)

-- 
2.9.3