linux-toradex.git/fs/nfsd/nfs4callback.c, branch v2.6.32.7

nfsd41: modify nfsd4.1 backchannel to use new xprt class

2009-09-16T00:52:13+00:00

This patch enables the use of the nfsv4.1 backchannel.

Signed-off-by: Alexandros Batsakis 
[initialize rpc_create_args.bc_xprt too]
Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd41: Backchannel: Implement cb_recall over NFSv4.1

2009-09-16T00:52:12+00:00

Signed-off-by: Ricardo Labiaga 
[nfsd41: cb_recall callback]
[Share v4.0 and v4.1 back channel xdr]
Signed-off-by: Andy Adamson 
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[Share v4.0 and v4.1 back channel xdr]
Signed-off-by: Andy Adamson 
Signed-off-by: Benny Halevy 
[nfsd41: use nfsd4_cb_sequence for callback minorversion]
[nfsd41: conditionally decode_sequence in nfs4_xdr_dec_cb_recall]
Signed-off-by: Benny Halevy 
[nfsd41: Backchannel: Add sequence arguments to callback RPC arguments]
Signed-off-by: Ricardo Labiaga 
[pulled-in definition of nfsd4_cb_done]
Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd41: Backchannel: cb_sequence callback

2009-09-16T00:49:56+00:00

Implement the cb_sequence callback conforming to draft-ietf-nfsv4-minorversion1

Note: highest slot id and target highest slot id do not have to be 0
as was previously implemented.  They can be greater than what the
nfs server sent if the client supports a larger slot table on the
backchannel.  At this point we just ignore that.

Signed-off-by: Benny Halevy 
Signed-off-by: Ricardo Labiaga 
[Rework the back channel xdr using the shared v4.0 and v4.1 framework.]
Signed-off-by: Andy Adamson 
[fixed indentation]
Signed-off-by: Benny Halevy 
[nfsd41: use nfsd4_cb_sequence for callback minorversion]
Signed-off-by: Benny Halevy 
[nfsd41: fix verification of CB_SEQUENCE highest slot id[
Signed-off-by: Benny Halevy 
[nfsd41: Backchannel: Remove old backchannel serialization]
[nfsd41: Backchannel: First callback sequence ID should be 1]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[nfsd41: decode_cb_sequence does not need to actually decode ignored fields]
Signed-off-by: Benny Halevy 
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd41: Backchannel: Setup sequence information

2009-09-16T00:49:56+00:00

Follows the model used by the NFS client.  Setup the RPC prepare and done
function pointers so that we can populate the sequence information if
minorversion == 1.  rpc_run_task() is then invoked directly just like
existing NFS client operations do.

nfsd4_cb_prepare() determines if the sequence information needs to be setup.
If the slot is in use, it adds itself to the wait queue.

nfsd4_cb_done() wakes anyone sleeping on the callback channel wait queue
after our RPC reply has been received.  It also sets the task message
result pointer to NULL to clearly indicate we're done using it.

Signed-off-by: Ricardo Labiaga 
[define and initialize cl_cb_seq_nr here]
[pulled out unused defintion of nfsd4_cb_done]
Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd41: Backchannel: Add sequence arguments to callback RPC arguments

2009-09-16T00:49:55+00:00

Follow the model we use in the client. Make the sequence arguments
part of the regular RPC arguments.  None of the callbacks that are
soon to be implemented expect results that need to be passed back
to the caller, so we don't define a separate RPC results structure.
For session validation, the cb_sequence decoding will use a pointer
to the sequence arguments that are part of the RPC argument.

Signed-off-by: Ricardo Labiaga 
[define struct nfsd4_cb_sequence here]
Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd41: Backchannel: callback infrastructure

2009-09-16T00:49:55+00:00

Keep the xprt used for create_session in cl_cb_xprt.
Mark cl_callback.cb_minorversion = 1 and remember
the client provided cl_callback.cb_prog rpc program number.
Use it to probe the callback path.

Use the client's network address to initialize as the
callback's address as expected by the xprt creation
routines.

Define xdr sizes and code nfs4_cb_compound header to be able
to send a null callback rpc.

Signed-off-by: Andy Adamson
Signed-off-by: Benny Halevy 
Signed-off-by: Ricardo Labiaga 
[get callback minorversion from fore channel's]
Signed-off-by: Benny Halevy 
[nfsd41: change bc_sock to bc_xprt]
Signed-off-by: Benny Halevy 
[pulled definition for cl_cb_xprt]
Signed-off-by: Benny Halevy 
[nfsd41: set up backchannel's cb_addr]
[moved rpc_create_args init to "nfsd: modify nfsd4.1 backchannel to use new xprt class"]
Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd4: use common rpc_cred for all callbacks

2009-09-16T00:49:34+00:00

Callbacks are always made using the machine's identity, so we can use a
single auth_generic credential shared among callbacks to all clients and
let the rpc code take care of the rest.

Signed-off-by: J. Bruce Fields

nfsd4: fix null dereference creating nfsv4 callback client

2009-09-16T00:49:33+00:00

On setting up the callback to the client, we attempt to use the same
authentication flavor the client did.  We find an rpc cred to use by
calling rpcauth_lookup_credcache(), which assumes that the given
authentication flavor has a credentials cache.  However, this is not
required to be true--in particular, auth_null does not use one.
Instead, we should call the auth's lookup_cred() method.

Without this, a client attempting to mount using nfsv4 and auth_null
triggers a null dereference.

Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields

nfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definition

2009-09-13T19:57:39+00:00

Signed-off-by: Benny Halevy 
Signed-off-by: J. Bruce Fields

nfsd: convert nfs4_cb_conn struct to hold address in sockaddr_storage

2009-08-21T15:27:43+00:00

...rather than as a separate address and port fields. This will be
necessary for implementing callbacks over IPv6. Also, convert
gen_callback to use the standard rpcuaddr2sockaddr routine rather than
its own private one.

Signed-off-by: Jeff Layton 
Acked-by: Chuck Lever 
Signed-off-by: J. Bruce Fields