From fc821d59209d96e80f30f670a3acac9582dfdefd Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Sun, 31 Jan 2016 14:53:08 -0500 Subject: [PATCH] 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 --- fs/nfs/pnfs_nfs.c | 16 +++++++++++++--- 1 file 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)) { -- 2.39.5