diff options
author | Bryan Schumaker <bjschuma@netapp.com> | 2012-07-16 16:39:17 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-07-17 13:33:52 -0400 |
commit | 428360d77c801932e4b28f15160aebbdb5f5a03e (patch) | |
tree | 2e96be9e5f6d1d75009c11e0adfad16a29595851 /fs/nfs/nfs4client.c | |
parent | a38a9eac75f0d09f1941a6e85e291c8e96bc8375 (diff) | |
download | op-kernel-dev-428360d77c801932e4b28f15160aebbdb5f5a03e.zip op-kernel-dev-428360d77c801932e4b28f15160aebbdb5f5a03e.tar.gz |
NFS: Initialize the NFS v4 client from init_nfs_v4()
And split these functions out of the generic client into a v4 specific
file.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4client.c')
-rw-r--r-- | fs/nfs/nfs4client.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c new file mode 100644 index 0000000..c5234b5 --- /dev/null +++ b/fs/nfs/nfs4client.c @@ -0,0 +1,144 @@ +/* + * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ +#include <linux/nfs_fs.h> +#include <linux/nfs_idmap.h> +#include <linux/sunrpc/auth.h> +#include <linux/sunrpc/xprt.h> +#include <linux/sunrpc/bc_xprt.h> +#include "internal.h" +#include "callback.h" + +#define NFSDBG_FACILITY NFSDBG_CLIENT + +/* + * Initialize the NFS4 callback service + */ +static int nfs4_init_callback(struct nfs_client *clp) +{ + int error; + + if (clp->rpc_ops->version == 4) { + struct rpc_xprt *xprt; + + xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); + + if (nfs4_has_session(clp)) { + error = xprt_setup_backchannel(xprt, + NFS41_BC_MIN_CALLBACKS); + if (error < 0) + return error; + } + + error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); + if (error < 0) { + dprintk("%s: failed to start callback. Error = %d\n", + __func__, error); + return error; + } + __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); + } + return 0; +} + +/* + * Initialize the minor version specific parts of an NFS4 client record + */ +static int nfs4_init_client_minor_version(struct nfs_client *clp) +{ +#if defined(CONFIG_NFS_V4_1) + if (clp->cl_mvops->minor_version) { + struct nfs4_session *session = NULL; + /* + * Create the session and mark it expired. + * When a SEQUENCE operation encounters the expired session + * it will do session recovery to initialize it. + */ + session = nfs4_alloc_session(clp); + if (!session) + return -ENOMEM; + + clp->cl_session = session; + /* + * The create session reply races with the server back + * channel probe. Mark the client NFS_CS_SESSION_INITING + * so that the client back channel can find the + * nfs_client struct + */ + nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); + } +#endif /* CONFIG_NFS_V4_1 */ + + return nfs4_init_callback(clp); +} + +/** + * nfs4_init_client - Initialise an NFS4 client record + * + * @clp: nfs_client to initialise + * @timeparms: timeout parameters for underlying RPC transport + * @ip_addr: callback IP address in presentation format + * @authflavor: authentication flavor for underlying RPC transport + * + * Returns pointer to an NFS client, or an ERR_PTR value. + */ +struct nfs_client *nfs4_init_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + const char *ip_addr, + rpc_authflavor_t authflavour) +{ + char buf[INET6_ADDRSTRLEN + 1]; + int error; + + if (clp->cl_cons_state == NFS_CS_READY) { + /* the client is initialised already */ + dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); + return clp; + } + + /* Check NFS protocol revision and initialize RPC op vector */ + clp->rpc_ops = &nfs_v4_clientops; + + __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); + error = nfs_create_rpc_client(clp, timeparms, authflavour); + if (error < 0) + goto error; + + /* If no clientaddr= option was specified, find a usable cb address */ + if (ip_addr == NULL) { + struct sockaddr_storage cb_addr; + struct sockaddr *sap = (struct sockaddr *)&cb_addr; + + error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); + if (error < 0) + goto error; + error = rpc_ntop(sap, buf, sizeof(buf)); + if (error < 0) + goto error; + ip_addr = (const char *)buf; + } + strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); + + error = nfs_idmap_new(clp); + if (error < 0) { + dprintk("%s: failed to create idmapper. Error = %d\n", + __func__, error); + goto error; + } + __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); + + error = nfs4_init_client_minor_version(clp); + if (error < 0) + goto error; + + if (!nfs4_has_session(clp)) + nfs_mark_client_ready(clp, NFS_CS_READY); + return clp; + +error: + nfs_mark_client_ready(clp, error); + nfs_put_client(clp); + dprintk("<-- nfs4_init_client() = xerror %d\n", error); + return ERR_PTR(error); +} |