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Commit 71a097c6 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4.1: Clean up bind_conn_to_session 



We don't need to fake up an entire session in order retrieve the arguments.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 7e9f0738

fs/nfs/nfs4proc.c

+14 −14
Original line number Diff line number Diff line
@@ -6648,47 +6648,47 @@ nfs41_same_server_scope(struct nfs41_server_scope *a, 
int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)

{

	int status;

	struct nfs41_bind_conn_to_session_args args = {

		.client = clp,

		.dir = NFS4_CDFC4_FORE_OR_BOTH,

	};

	struct nfs41_bind_conn_to_session_res res;

	struct rpc_message msg = {

		.rpc_proc =

			&nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],

		.rpc_argp = clp,

		.rpc_argp = &args,

		.rpc_resp = &res,

		.rpc_cred = cred,

	};



	dprintk("--> %s\n", __func__);



	res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);

	if (unlikely(res.session == NULL)) {

		status = -ENOMEM;

		goto out;

	}

	nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);

	if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))

		args.dir = NFS4_CDFC4_FORE;



	status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);

	trace_nfs4_bind_conn_to_session(clp, status);

	if (status == 0) {

		if (memcmp(res.session->sess_id.data,

		if (memcmp(res.sessionid.data,

		    clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {

			dprintk("NFS: %s: Session ID mismatch\n", __func__);

			status = -EIO;

			goto out_session;

			goto out;

		}

		if (res.dir != NFS4_CDFS4_BOTH) {

		if ((res.dir & args.dir) != res.dir || res.dir == 0) {

			dprintk("NFS: %s: Unexpected direction from server\n",

				__func__);

			status = -EIO;

			goto out_session;

			goto out;

		}

		if (res.use_conn_in_rdma_mode) {

		if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {

			dprintk("NFS: %s: Server returned RDMA mode = true\n",

				__func__);

			status = -EIO;

			goto out_session;

			goto out;

		}

	}

out_session:

	kfree(res.session);

out:

	dprintk("<-- %s status= %d\n", __func__, status);

	return status;

fs/nfs/nfs4xdr.c

+8 −8
Original line number Diff line number Diff line
@@ -1715,17 +1715,17 @@ static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, stru 
#if defined(CONFIG_NFS_V4_1)

/* NFSv4.1 operations */

static void encode_bind_conn_to_session(struct xdr_stream *xdr,

				   struct nfs4_session *session,

				   struct nfs41_bind_conn_to_session_args *args,

				   struct compound_hdr *hdr)

{

	__be32 *p;



	encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION,

		decode_bind_conn_to_session_maxsz, hdr);

	encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);

	encode_opaque_fixed(xdr, args->sessionid.data, NFS4_MAX_SESSIONID_LEN);

	p = xdr_reserve_space(xdr, 8);

	*p++ = cpu_to_be32(NFS4_CDFC4_FORE_OR_BOTH);

	*p = 0;	/* use_conn_in_rdma_mode = False */

	*p++ = cpu_to_be32(args->dir);

	*p = (args->use_conn_in_rdma_mode) ? cpu_to_be32(1) : cpu_to_be32(0);

}



static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map)
@@ -2734,14 +2734,14 @@ static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req, 
 */

static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req,

				struct xdr_stream *xdr,

				struct nfs_client *clp)

				struct nfs41_bind_conn_to_session_args *args)

{

	struct compound_hdr hdr = {

		.minorversion = clp->cl_mvops->minor_version,

		.minorversion = args->client->cl_mvops->minor_version,

	};



	encode_compound_hdr(xdr, req, &hdr);

	encode_bind_conn_to_session(xdr, clp->cl_session, &hdr);

	encode_bind_conn_to_session(xdr, args, &hdr);

	encode_nops(&hdr);

}
@@ -5613,7 +5613,7 @@ static int decode_bind_conn_to_session(struct xdr_stream *xdr, 


	status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION);

	if (!status)

		status = decode_sessionid(xdr, &res->session->sess_id);

		status = decode_sessionid(xdr, &res->sessionid);

	if (unlikely(status))

		return status;

include/linux/nfs_xdr.h

+8 −1
Original line number Diff line number Diff line
@@ -1167,8 +1167,15 @@ struct nfs41_impl_id { 
	struct nfstime4			date;

};



struct nfs41_bind_conn_to_session_args {

	struct nfs_client		*client;

	struct nfs4_sessionid		sessionid;

	u32				dir;

	bool				use_conn_in_rdma_mode;

};



struct nfs41_bind_conn_to_session_res {

	struct nfs4_session		*session;

	struct nfs4_sessionid		sessionid;

	u32				dir;

	bool				use_conn_in_rdma_mode;

};