From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
We want to enable RDMA and UDP as valid transport methods if a
GETDEVICEINFO call specifies it. Do so by adding a parser for the
netid that translates it to an appropriate argument for the RPC
transport layer.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfs/pnfs.h | 2 ++
fs/nfs/pnfs_nfs.c | 34 +++++++++++++++++++---------------
2 files changed, 21 insertions(+), 15 deletions(-)
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 2661c44c62db..f618c49697bb 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -51,6 +51,8 @@ struct nfs4_pnfs_ds_addr {
size_t da_addrlen;
struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
char *da_remotestr; /* human readable addr+port */
+ const char *da_netid;
+ int da_transport;
};
struct nfs4_pnfs_ds {
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index 8c5921be41f8..b96ecb395310 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -672,6 +672,7 @@ static struct nfs4_pnfs_ds_addr *nfs4_pnfs_ds_addr_alloc(gfp_t gfp_flags)
static void nfs4_pnfs_ds_addr_free(struct nfs4_pnfs_ds_addr *da)
{
kfree(da->da_remotestr);
+ kfree(da->da_netid);
kfree(da);
}
@@ -867,13 +868,15 @@ static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
if (!IS_ERR(clp)) {
struct xprt_create xprt_args = {
- .ident = XPRT_TRANSPORT_TCP,
+ .ident = da->da_transport,
.net = clp->cl_net,
.dstaddr = (struct sockaddr *)&da->da_addr,
.addrlen = da->da_addrlen,
.servername = clp->cl_hostname,
};
+ if (da->da_transport != clp->cl_proto)
+ continue;
if (da->da_addr.ss_family != clp->cl_addr.ss_family)
continue;
/* Add this address as an alias */
@@ -883,7 +886,7 @@ static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
}
clp = get_v3_ds_connect(mds_srv,
(struct sockaddr *)&da->da_addr,
- da->da_addrlen, IPPROTO_TCP,
+ da->da_addrlen, da->da_transport,
timeo, retrans);
if (IS_ERR(clp))
continue;
@@ -921,7 +924,7 @@ static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
if (!IS_ERR(clp) && clp->cl_mvops->session_trunk) {
struct xprt_create xprt_args = {
- .ident = XPRT_TRANSPORT_TCP,
+ .ident = da->da_transport,
.net = clp->cl_net,
.dstaddr = (struct sockaddr *)&da->da_addr,
.addrlen = da->da_addrlen,
@@ -936,6 +939,8 @@ static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
.data = &xprtdata,
};
+ if (da->da_transport != clp->cl_proto)
+ continue;
if (da->da_addr.ss_family != clp->cl_addr.ss_family)
continue;
/**
@@ -950,8 +955,9 @@ static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
} else {
clp = nfs4_set_ds_client(mds_srv,
(struct sockaddr *)&da->da_addr,
- da->da_addrlen, IPPROTO_TCP,
- timeo, retrans, minor_version);
+ da->da_addrlen,
+ da->da_transport, timeo,
+ retrans, minor_version);
if (IS_ERR(clp))
continue;
@@ -1042,8 +1048,8 @@ nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
int nlen, rlen;
int tmp[2];
__be32 *p;
- char *netid, *match_netid;
- size_t len, match_netid_len;
+ char *netid;
+ size_t len;
char *startsep = "";
char *endsep = "";
@@ -1125,15 +1131,11 @@ nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
case AF_INET:
((struct sockaddr_in *)&da->da_addr)->sin_port = port;
da->da_addrlen = sizeof(struct sockaddr_in);
- match_netid = "tcp";
- match_netid_len = 3;
break;
case AF_INET6:
((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port;
da->da_addrlen = sizeof(struct sockaddr_in6);
- match_netid = "tcp6";
- match_netid_len = 4;
startsep = "[";
endsep = "]";
break;
@@ -1144,12 +1146,15 @@ nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
goto out_free_da;
}
- if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) {
- dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n",
- __func__, netid, match_netid);
+ da->da_transport = xprt_find_transport_ident(netid);
+ if (da->da_transport < 0) {
+ dprintk("%s: ERROR: unknown r_netid \"%s\"\n",
+ __func__, netid);
goto out_free_da;
}
+ da->da_netid = netid;
+
/* save human readable address */
len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7;
da->da_remotestr = kzalloc(len, gfp_flags);
@@ -1161,7 +1166,6 @@ nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr);
kfree(buf);
- kfree(netid);
return da;
out_free_da:
--
2.28.0
