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| author | Andy Adamson <andros@netapp.com> | 2011-03-01 04:34:17 +0300 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-11 23:38:42 +0300 |
| commit | d83217c13531fd59730d77b5c2284e90e56c0a50 (patch) | |
| tree | e347037afc91fdb81e0e2fcf7225d30462fb90af /fs/nfs/nfs4filelayoutdev.c | |
| parent | 64419a9b20938d9070fdd8c58c2fa23c911915f8 (diff) | |
| download | linux-d83217c13531fd59730d77b5c2284e90e56c0a50.tar.xz | |
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/nfs4filelayoutdev.c')
| -rw-r--r-- | fs/nfs/nfs4filelayoutdev.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c index b73c34375f60..8bc91fb8b6fa 100644 --- a/fs/nfs/nfs4filelayoutdev.c +++ b/fs/nfs/nfs4filelayoutdev.c @@ -104,6 +104,67 @@ _data_server_lookup_locked(u32 ip_addr, u32 port) return NULL; } +/* + * Create an rpc connection to the nfs4_pnfs_ds data server + * Currently only support IPv4 + */ +static int +nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds) +{ + struct nfs_client *clp; + struct sockaddr_in sin; + int status = 0; + + dprintk("--> %s ip:port %x:%hu au_flavor %d\n", __func__, + ntohl(ds->ds_ip_addr), ntohs(ds->ds_port), + mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor); + + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = ds->ds_ip_addr; + sin.sin_port = ds->ds_port; + + clp = nfs4_set_ds_client(mds_srv->nfs_client, (struct sockaddr *)&sin, + sizeof(sin), IPPROTO_TCP); + if (IS_ERR(clp)) { + status = PTR_ERR(clp); + goto out; + } + + if ((clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) != 0) { + if (!is_ds_client(clp)) { + status = -ENODEV; + goto out_put; + } + ds->ds_clp = clp; + dprintk("%s [existing] ip=%x, port=%hu\n", __func__, + ntohl(ds->ds_ip_addr), ntohs(ds->ds_port)); + goto out; + } + + /* + * Do not set NFS_CS_CHECK_LEASE_TIME instead set the DS lease to + * be equal to the MDS lease. Renewal is scheduled in create_session. + */ + spin_lock(&mds_srv->nfs_client->cl_lock); + clp->cl_lease_time = mds_srv->nfs_client->cl_lease_time; + spin_unlock(&mds_srv->nfs_client->cl_lock); + clp->cl_last_renewal = jiffies; + + /* New nfs_client */ + status = nfs4_init_ds_session(clp); + if (status) + goto out_put; + + ds->ds_clp = clp; + dprintk("%s [new] ip=%x, port=%hu\n", __func__, ntohl(ds->ds_ip_addr), + ntohs(ds->ds_port)); +out: + return status; +out_put: + nfs_put_client(clp); + goto out; +} + static void destroy_ds(struct nfs4_pnfs_ds *ds) { |