diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2018-05-04 15:34:37 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-05-07 09:20:03 -0400 |
| commit | 52d28fe4f61350baf7e84b3f3f3e34f0fc077ec1 (patch) | |
| tree | ce19bf117d1a0b4c70b93b3f18d23c5014f3fe37 /net/sunrpc | |
| parent | a2268cfbf599e7f55d4ee68193f08b4f44535fac (diff) | |
xprtrdma: Try to fail quickly if proto=rdma
rdma_resolve_addr(3) says:
> This call is used to map a given destination IP address to a
> usable RDMA address. The IP to RDMA address mapping is done
> using the local routing tables, or via ARP.
If this can't be done, there's no local device that can be used
to establish an RDMA-capable network path to the remote. In this
case, the RDMA CM very quickly posts an RDMA_CM_EVENT_ADDR_ERROR
upcall.
Currently rpcrdma_conn_upcall() converts RDMA_CM_EVENT_ADDR_ERROR
to EHOSTUNREACH. mount.nfs seems to want to retry EHOSTUNREACH
forever, thinking that this is a temporary situation. This makes
mount.nfs appear to hang if I try to mount with proto=rdma through,
say, a conventional Ethernet device.
If the admin has specified proto=rdma along with a server IP address
that requires a network path that does not support RDMA, instead
let's fail with a permanent error. -EPROTONOSUPPORT is returned when
NFSv4 or one of its minor versions is not supported.
-EPROTO is not (currently) retried by mount.nfs.
There are potentially other similar cases where -EPROTO is an
appropriate return code.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Olga Kornievskaia <kolga@netapp.com>
Tested-by: Anna Schumaker <Anna.Schumaker@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index b2c6f525b020..4ee9704ffe19 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -232,7 +232,7 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) complete(&ia->ri_done); break; case RDMA_CM_EVENT_ADDR_ERROR: - ia->ri_async_rc = -EHOSTUNREACH; + ia->ri_async_rc = -EPROTO; complete(&ia->ri_done); break; case RDMA_CM_EVENT_ROUTE_ERROR: @@ -263,7 +263,7 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) connstate = -ENOTCONN; goto connected; case RDMA_CM_EVENT_UNREACHABLE: - connstate = -ENETDOWN; + connstate = -ENETUNREACH; goto connected; case RDMA_CM_EVENT_REJECTED: dprintk("rpcrdma: connection to %s:%s rejected: %s\n", |