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authorAndy Adamson <andros@netapp.com>2011-03-01 01:34:17 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-03-11 15:38:42 -0500
commitd83217c13531fd59730d77b5c2284e90e56c0a50 (patch)
treee347037afc91fdb81e0e2fcf7225d30462fb90af /fs/nfs/client.c
parent64419a9b20938d9070fdd8c58c2fa23c911915f8 (diff)
downloadop-kernel-dev-d83217c13531fd59730d77b5c2284e90e56c0a50.zip
op-kernel-dev-d83217c13531fd59730d77b5c2284e90e56c0a50.tar.gz
NFSv4.1: data server connection
Introduce a data server set_client and init session following the nfs4_set_client and nfs4_init_session convention. Once a new nfs_client is on the nfs_client_list, the nfs_client cl_cons_state serializes access to creating an nfs_client struct with matching properties. Use the new nfs_get_client() that initializes new clients. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/client.c')
-rw-r--r--fs/nfs/client.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index d5c5bdf..6dd50ac 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -1417,6 +1417,47 @@ error:
return error;
}
+/*
+ * Set up a pNFS Data Server client.
+ *
+ * Return any existing nfs_client that matches server address,port,version
+ * and minorversion.
+ *
+ * For a new nfs_client, use a soft mount (default), a low retrans and a
+ * low timeout interval so that if a connection is lost, we retry through
+ * the MDS.
+ */
+struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
+ const struct sockaddr *ds_addr,
+ int ds_addrlen, int ds_proto)
+{
+ struct nfs_client_initdata cl_init = {
+ .addr = ds_addr,
+ .addrlen = ds_addrlen,
+ .rpc_ops = &nfs_v4_clientops,
+ .proto = ds_proto,
+ .minorversion = mds_clp->cl_minorversion,
+ };
+ struct rpc_timeout ds_timeout = {
+ .to_initval = 15 * HZ,
+ .to_maxval = 15 * HZ,
+ .to_retries = 1,
+ .to_exponential = 1,
+ };
+ struct nfs_client *clp;
+
+ /*
+ * Set an authflavor equual to the MDS value. Use the MDS nfs_client
+ * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
+ * (section 13.1 RFC 5661).
+ */
+ clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
+ mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
+
+ dprintk("<-- %s %p\n", __func__, clp);
+ return clp;
+}
+EXPORT_SYMBOL(nfs4_set_ds_client);
/*
* Session has been established, and the client marked ready.
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