[PATCH v4 resend 0/2] pnfs: allow client to support servers that send multiple layout types

[Jeff Layton <jlayton@redhat.com>]

Resending as I noticed that Anna had merged the first of the two
patches into her linux-next branch, but not the second one. Were
there any further concerns with it?

v4:
- pass around fsinfo instead of separate array and length args

v3:
- use sort() from lib/sort.c to sort the list

v2:
- rework Tigran's patch to preserve existing selection behaviour
- simplify layout driver selection by sorting the list

This is v4 of the patchset. The main change is the change to pass
around the fsinfo instead of separate array pointer and length args.

Only lightly tested by mounting a server that sends both flexfiles and
block layouts. The client successfully selected the block layout in most
cases, but if I blacklist blocklayoutdriver then it selects flexfiles
instead.

Jeff Layton (2):
  pnfs: track multiple layout types in fsinfo structure
  pnfs: add a new mechanism to select a layout driver according to an
    ordered list

 fs/nfs/client.c         |  3 ++-
 fs/nfs/nfs4proc.c       |  2 +-
 fs/nfs/nfs4xdr.c        | 40 ++++++++++++++--------------
 fs/nfs/pnfs.c           | 69 ++++++++++++++++++++++++++++++++++++++++---------
 fs/nfs/pnfs.h           |  5 ++--
 include/linux/nfs_xdr.h |  8 +++++-
 6 files changed, 91 insertions(+), 36 deletions(-)

-- 
2.7.4