[PATCH 0/10] pnfs-submit add layoutget,layoutreturn error handling version 2

[andros@netapp.com]

Responded to comments, added a 2 cleanup patchses

Plus some code cleanup
0001-SQUASHME-pnfs-submit-remove-unused-filelayout_mount_.patch

and some bug fixes
0002-SQUASHME-pnfs-submit-pnfs_try_to_read-write-commit-u.patch

NOTE: this patch: 0003-SQUASHME-pnfs-submit-tell-commit-to-use-the-MDS.patch
was replaced by:
0003-SQUASHME-pnfs-submit-clear-page-lseg-on-partial-i-o.patch


Remove unused (by file layout) encode_layoutreturn io operation
0004-SQUASHME-pnfs-submit-remove-encode_layoutreturn.patch
0005-SQUASHME-pnfs-submit-add-error-handling-to-layout-re.patch

0006-SQUASHME-pnfs-submit-handle-assassinated-layoutcommi.patch

Note: pnfs4_proc_layoutget is only called by send_layout() which prints
the status.
0007-SQUASHME-pnfs-submit-add-error-handlers-to-layout-ge.patch

Add back encode_layoutreturn io operation
0008-pnfs-post-submit-restore-encode_layoutreturn.patch


New patches:
0009-SQUASHME-pnfs-submit-don-t-re-initialize-i_lock.patch

This gets rid of a frame stack warning;
0010-SQUASHME-pnfs-submit-remove-struct-nfs_server-from-s.patch

Testing:
---------

CONFIG_NFS_V4_1 set: NFSv4.0 NFSv4.1 pNFS
Passes Connectathon tests

Tested layoutget and layoutreturn recovery from NFS4ERR_DEAD_SESSION with the
pyNFS server and the testclient framework.

Still todo:

Recover from NFS4ERR_BAD_STATEID. Currently layoutreturn, layoutget, and
layoutcommit do not pass nfs_stste to the error handlers.

Handle NFS4ERR_BAD_LAYOUT.

CONFIG_NFS_V4_1 not set: NFSv4.o mount passes cthon tests.

-->Andy