[pnfs] nfs41 patch subsets

[Benny Halevy]

I took a stab at separating all the patches in the nfs41
into a series of patchsets that make sense for review(ability)
There's going to be more squashing, slicing, and dicing
of patches so this is not the final list.

Benny

client patches
--------------

client sunrpc infra
	0dd3961 nfs41: sunrpc: introduce rpc_call_validate_args action
	156d3ff [FIXME] nfs41: sunrpc: do not verify calldir in call_verify

client infra
	ca7ad4a nfs41: Add Kconfig symbols for NFSv4.1
	894d9d4 nfs41: common protocol definitions
	4706b3c nfs41: refactor xdr: point to struct xdr_stream
	29b3f67 nfs41: refactor xdr: add nfs40 stubs
	squash -> ab07dd9 [SQUASHME] nfs41: rename nfs40 procedures and version names back to nfs4
	b28a4a5 nfs41: refactor xdr: restore auxilary pointer name
	067a9c8 nfs41: bulk rename of NFS4 xdr defines to NFS40
	2731ffc nfs41: add minorversion arg to encode_compound_hdr
	213c2b0 nfs41: client xdr definitions
	-> 3c9edb3 nfs41: nfs4_async_handle_error for data server

client minorvers
	f6ea685 nfs41: add mount command option minorvers
	9170414 nfs41: struct nfs_server minorversion
	2842645 nfs41: set nfs_client rpc_ops based on minorversion
	7b0e148 [FIXME] nfs41: set nfs4 rpc program based on minorversion
	squash -> 5c5737f [SQUASHME] nfs41: obliterate nfs4_setup_nfs4_program
	02e2625 nfs41: sunrpc: support minorversion for rpc_clnt version table.
	8ddcd3d nfs41: use ptr to rpc procedures via struct nfs_client
	ebdc038 nfs: pass recovery status from reclaimer kthread up to nfs4_wait_clnt_recover
	049d209 nfs41: fallback to lower minorversion if nfs4_create_server fails
	da87e2f nfs41: Proper initialization of nfs_client_initdata.rpc_ops

client ops infra
	880c54d nfs41: nfsv4.1 xdr routines for nfsv4.0 operations
	43175aa nfs41: stubs for nfs41 xdr routines
	68366f2 nfs41: stubs for nfs41 procedures
	b93b8c5 nfs41: make nfs4_wait_bit_killable public
	-> 01e0b63 nfs41: introduce nfs4_call_sync
		* call to nfs4_recover_expired_lease doesn't belong here

client sessions
	+> b09bdd3 nfs41: sessions client infrastructure
	squash -> 2a84b08 [SQUASHME] nfs41: remove unused struct nfs4_session fields
	f772d9e nfs41: session recovery infrastructure
	f5cd9d3 [FIXME] nfs41: lease renewal
	-> 249898c nfs41: call destroy session in nfs4_put_session
	-> 53c8a71 nfs41: kick start nfs41 session recovery when handling errors
	-> ba45a0b nfs41: limit the number of new session retrys
	-> 62fc10a nfs41: use rpc_call_validate_args to initiate session recovery from nfs4_call_sync
	-> 12aa5db nfs41: initialize a new session when cloning nfs_server
	-> 1770127 nfs41: add nfs_client pointer to struct nfs4_session
	-> cce7150 nfs41: schedule async session reset
	-> f187053 nfs41: handle state renewal errors

client slot table
	92931aa nfs41: slot table init and destroy
	dbdcec7 nfs41: find slot
	d6afbfb nfs41: free slot

client sequence
	b952581 nfs41: setup_sequence method
	48d02d0 nfs41: nfs41_sequence_done
	7e18396 nfs41: nfs41_call_sync_done
	1a54d7e nfs41: sequence setup/done support

client exchange_id
	228e131 nfs41: establish sessions-based clientid
	f798fbd nfs41: exchange_id operation
	446b934 nfs41: introduce get_state_renewal_cred
	68aad7d nfs41: get cred in exchange_id when cred arg is NULL

client nfs41 semantics
	+> cc9a63f nfs41: send zero clientid for minorversion1 open/lock ops.
	+> f9586f6 nfs41: increment_{open,lock}_seqid

client ops
	1569ffc nfs41: get_lease_time
	d082346 nfs41: create_session operation
	squash -> 237b10e [SQUASHME] nfs41: bump exchange_id session seq id only on success
	4e20917 nfs41: destroy_session operation
	squash -> cdd61d2 [SQUASHME] nfs41: only call destroy session from put session
	squash -> 92949a5 [SQUASHME] nfs41: don't set flags in a destroyed session
	0a44754 nfs41: sequence operation

client backchannel infra
	5724d5a nfs41: Add ability to read RPC call direction on TCP stream.
	7baed6a nfs41: Refactor NFSv4 callback service
	6bef055 nfs41: client callback structures
	dab245e nfs41: Initialize new rpc_xprt callback related fields
	0b713d1 nfs41: New backchannel helper routines
	20bd5dc nfs41: New include/linux/sunrpc/bc_xprt.h
	374f315 nfs41: New xs_tcp_read_data()
	edf3afc nfs41: Add backchannel processing support to RPC state machine
	113561c nfs41: Backchannel callback service helper routines
	b500053 nfs41: Refactor svc_process()
	2160d10 nfs41: Backchannel bc_svc_process()
	ba1fb7a nfs41: Implement NFSv4.1 callback service process.
	490718d nfs41: New backchannel support object files to sunrpc module.
	1729f01 nfs41: Setup the backchannel
	47b7b6d nfs41: sunrpc: provide functions to create and destroy a svc_xprt for backchannel use
	a7b1d6c nfs41: sunrpc: add a struct svc_xprt pointer to struct svc_serv for backchannel use
	5bdd5e4 nfs41: create a svc_xprt for nfs41 callback thread and use for incoming callbacks
	c870fd8 nfs41: Add a reference to svc_serv during callback service bring up
	3a0315c nfs41: Allow NFSv4 and NFSv4.1 callback services to coexist
	e856e1f nfs41: callback_svc needs to be set for v4 and v4.1 mounts

client backchannel
	dd22e52 nfs41: Client indicates presence of NFSv4.1 callback channel.
	0d8552e nfs41: Get the rpc_xprt * from the rpc_rqst instead of the rpc_clnt.
	b2a88e4 nfs41: Release backchannel resources associated with session
	3ffd8b6 nfs41: store minorversion in cb_compound_hdr_arg
	cd1b04d nfs41: decode minorversion 1 cb_compound header
	1a7d4de nfs41: callback numbers definitions
	ba316b8 nfs41: consider minorversion in callback_xdr:process_op
	-> d2b1af8 nfs41: define CB_NOTIFY_DEVICEID as not supported

client cb_sequence
	131d788 nfs41: cb_sequence protocol level data structures
	be57f65 nfs41: cb_sequence proc implementation
	6dfc3ad nfs41: cb_sequence xdr implementation
	88fb859 nfs41: verify CB_SEQUENCE position in callback compound

server patches
--------------

server infra
	da06142 nfsd41: Add Kconfig symbols for NFSv4.1
	6a4b459 nfsd41: xdr stubs
	01e9d1b nfsd41: proc stubs
	4aa5349 [FIXME] nfsd41: server infrastructure

server ops
	bd7f8fe nfsd41: exchange_id operation
	d70655c nfsd41: create_session operation
	af77533 nfsd41: destroy_session operation
	f5facf3 nfsd41: sequence operation

server backchannel
	d0a6cf6 nfsd41: sunrpc: Added rpc server-side backchannel handling
	1911ef1 nfsd41: callback infrastructure

server cb ops
	44291b5 nfsd41: cb_sequence callback
	9a005d3 nfsd41: cb_recall callback

server excl create
	533de3a nfsd41: pass writable attrs mask to nfsd4_decode_fattr
	e491217 nfsd41: support for 3-word long attribute bitmask
	d00a173 nfsd41: SUPPATTR_EXCLCREAT attribute
	dfeca32 nfsd41: CREATE_EXCLUSIVE4_1