diff options
| author | Jeff Layton <jlayton@redhat.com> | 2017-02-24 13:25:23 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-02-24 16:55:46 -0500 |
| commit | 362142b25843fb059941aaa01b91501d5d8652cc (patch) | |
| tree | d8069aae1c1aa73a17ee47ec0df3391cb01fdee2 /net/sunrpc/xprtrdma | |
| parent | 05a45a2db42543c5f1a32e08f545aebbd7cb4790 (diff) | |
sunrpc: flag transports as having congestion control
NFSv4 requires a transport protocol with congestion control in most
cases.
On an IP network, that means that NFSv4 over UDP should be forbidden.
The situation with RDMA is a bit more nuanced, but most RDMA transports
are suitable for this. For now, we assume that all RDMA transports are
suitable, but we may need to revise that at some point.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index ab2fd5377f94..9d9e4e16080f 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -569,6 +569,14 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv, spin_lock_init(&cma_xprt->sc_ctxt_lock); spin_lock_init(&cma_xprt->sc_map_lock); + /* + * Note that this implies that the underlying transport support + * has some form of congestion control (see RFC 7530 section 3.1 + * paragraph 2). For now, we assume that all supported RDMA + * transports are suitable here. + */ + set_bit(XPT_CONG_CTRL, &cma_xprt->sc_xprt.xpt_flags); + if (listener) set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags); |