diff options
Diffstat (limited to 'net/sunrpc/xprtrdma/transport.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 57 |
1 files changed, 49 insertions, 8 deletions
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index c717f5410776..62ecbccd9748 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -66,8 +66,8 @@ static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE; unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE; static unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE; static unsigned int xprt_rdma_inline_write_padding; -static unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR; - int xprt_rdma_pad_optimize = 0; +unsigned int xprt_rdma_memreg_strategy = RPCRDMA_FRMR; +int xprt_rdma_pad_optimize; #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) @@ -396,7 +396,7 @@ xprt_setup_rdma(struct xprt_create *args) new_xprt = rpcx_to_rdmax(xprt); - rc = rpcrdma_ia_open(new_xprt, sap, xprt_rdma_memreg_strategy); + rc = rpcrdma_ia_open(new_xprt, sap); if (rc) goto out1; @@ -457,19 +457,33 @@ out1: return ERR_PTR(rc); } -/* - * Close a connection, during shutdown or timeout/reconnect +/** + * xprt_rdma_close - Close down RDMA connection + * @xprt: generic transport to be closed + * + * Called during transport shutdown reconnect, or device + * removal. Caller holds the transport's write lock. */ static void xprt_rdma_close(struct rpc_xprt *xprt) { struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); + struct rpcrdma_ep *ep = &r_xprt->rx_ep; + struct rpcrdma_ia *ia = &r_xprt->rx_ia; + + dprintk("RPC: %s: closing xprt %p\n", __func__, xprt); - dprintk("RPC: %s: closing\n", __func__); - if (r_xprt->rx_ep.rep_connected > 0) + if (test_and_clear_bit(RPCRDMA_IAF_REMOVING, &ia->ri_flags)) { + xprt_clear_connected(xprt); + rpcrdma_ia_remove(ia); + return; + } + if (ep->rep_connected == -ENODEV) + return; + if (ep->rep_connected > 0) xprt->reestablish_timeout = 0; xprt_disconnect_done(xprt); - rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia); + rpcrdma_ep_disconnect(ep, ia); } static void @@ -484,6 +498,27 @@ xprt_rdma_set_port(struct rpc_xprt *xprt, u16 port) dprintk("RPC: %s: %u\n", __func__, port); } +/** + * xprt_rdma_timer - invoked when an RPC times out + * @xprt: controlling RPC transport + * @task: RPC task that timed out + * + * Invoked when the transport is still connected, but an RPC + * retransmit timeout occurs. + * + * Since RDMA connections don't have a keep-alive, forcibly + * disconnect and retry to connect. This drives full + * detection of the network path, and retransmissions of + * all pending RPCs. + */ +static void +xprt_rdma_timer(struct rpc_xprt *xprt, struct rpc_task *task) +{ + dprintk("RPC: %5u %s: xprt = %p\n", task->tk_pid, __func__, xprt); + + xprt_force_disconnect(xprt); +} + static void xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) { @@ -659,6 +694,8 @@ xprt_rdma_free(struct rpc_task *task) * xprt_rdma_send_request - marshal and send an RPC request * @task: RPC task with an RPC message in rq_snd_buf * + * Caller holds the transport's write lock. + * * Return values: * 0: The request has been sent * ENOTCONN: Caller needs to invoke connect logic then call again @@ -685,6 +722,9 @@ xprt_rdma_send_request(struct rpc_task *task) struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); int rc = 0; + if (!xprt_connected(xprt)) + goto drop_connection; + /* On retransmit, remove any previously registered chunks */ if (unlikely(!list_empty(&req->rl_registered))) r_xprt->rx_ia.ri_ops->ro_unmap_safe(r_xprt, req, false); @@ -776,6 +816,7 @@ static struct rpc_xprt_ops xprt_rdma_procs = { .alloc_slot = xprt_alloc_slot, .release_request = xprt_release_rqst_cong, /* ditto */ .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */ + .timer = xprt_rdma_timer, .rpcbind = rpcb_getport_async, /* sunrpc/rpcb_clnt.c */ .set_port = xprt_rdma_set_port, .connect = xprt_rdma_connect, |