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authorTrond Myklebust <trond.myklebust@primarydata.com>2016-01-31 22:53:08 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-02-06 02:48:57 +0300
commitfc821d59209d96e80f30f670a3acac9582dfdefd (patch)
tree6eb18415f3767d3dac39e6f31a79fcb9b8d6588c /fs/nfs
parent7f554890587c63ca4c087d6bcc4a9fe368e57484 (diff)
downloadlinux-fc821d59209d96e80f30f670a3acac9582dfdefd.tar.xz
pnfs/NFSv4.1: Add multipath capabilities to pNFS flexfiles servers over NFSv3
This adds multipathing to pNFS over NFSv3 as described in the flexfiles draft spec. Ideally, we'd like to do the same for pNFS files, but the NFSv4.1 protocol requires a call to EXCHANGE_ID in order to test that the connection can do session trunking. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/pnfs_nfs.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index 81ac6480f9e7..4aaed890048f 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -606,12 +606,22 @@ static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
dprintk("%s: DS %s: trying address %s\n",
__func__, ds->ds_remotestr, da->da_remotestr);
- clp = get_v3_ds_connect(mds_srv->nfs_client,
+ if (!IS_ERR(clp)) {
+ struct xprt_create xprt_args = {
+ .ident = XPRT_TRANSPORT_TCP,
+ .net = clp->cl_net,
+ .dstaddr = (struct sockaddr *)&da->da_addr,
+ .addrlen = da->da_addrlen,
+ .servername = clp->cl_hostname,
+ };
+ /* Add this address as an alias */
+ rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args,
+ rpc_clnt_test_and_add_xprt, NULL);
+ } else
+ clp = get_v3_ds_connect(mds_srv->nfs_client,
(struct sockaddr *)&da->da_addr,
da->da_addrlen, IPPROTO_TCP,
timeo, retrans, au_flavor);
- if (!IS_ERR(clp))
- break;
}
if (IS_ERR(clp)) {