diff options
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_transport.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c new file mode 100644 index 000000000..f776f0cb4 --- /dev/null +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -0,0 +1,610 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (c) 2015-2018 Oracle. All rights reserved. + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. + * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the BSD-type + * license below: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Network Appliance, Inc. nor the names of + * its contributors may be used to endorse or promote products + * derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Author: Tom Tucker <tom@opengridcomputing.com> + */ + +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/workqueue.h> +#include <linux/export.h> + +#include <rdma/ib_verbs.h> +#include <rdma/rdma_cm.h> +#include <rdma/rw.h> + +#include <linux/sunrpc/addr.h> +#include <linux/sunrpc/debug.h> +#include <linux/sunrpc/svc_xprt.h> +#include <linux/sunrpc/svc_rdma.h> + +#include "xprt_rdma.h" +#include <trace/events/rpcrdma.h> + +#define RPCDBG_FACILITY RPCDBG_SVCXPRT + +static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, + struct net *net); +static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, + struct net *net, + struct sockaddr *sa, int salen, + int flags); +static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt); +static void svc_rdma_detach(struct svc_xprt *xprt); +static void svc_rdma_free(struct svc_xprt *xprt); +static int svc_rdma_has_wspace(struct svc_xprt *xprt); +static void svc_rdma_secure_port(struct svc_rqst *); +static void svc_rdma_kill_temp_xprt(struct svc_xprt *); + +static const struct svc_xprt_ops svc_rdma_ops = { + .xpo_create = svc_rdma_create, + .xpo_recvfrom = svc_rdma_recvfrom, + .xpo_sendto = svc_rdma_sendto, + .xpo_result_payload = svc_rdma_result_payload, + .xpo_release_ctxt = svc_rdma_release_ctxt, + .xpo_detach = svc_rdma_detach, + .xpo_free = svc_rdma_free, + .xpo_has_wspace = svc_rdma_has_wspace, + .xpo_accept = svc_rdma_accept, + .xpo_secure_port = svc_rdma_secure_port, + .xpo_kill_temp_xprt = svc_rdma_kill_temp_xprt, +}; + +struct svc_xprt_class svc_rdma_class = { + .xcl_name = "rdma", + .xcl_owner = THIS_MODULE, + .xcl_ops = &svc_rdma_ops, + .xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA, + .xcl_ident = XPRT_TRANSPORT_RDMA, +}; + +/* QP event handler */ +static void qp_event_handler(struct ib_event *event, void *context) +{ + struct svc_xprt *xprt = context; + + trace_svcrdma_qp_error(event, (struct sockaddr *)&xprt->xpt_remote); + switch (event->event) { + /* These are considered benign events */ + case IB_EVENT_PATH_MIG: + case IB_EVENT_COMM_EST: + case IB_EVENT_SQ_DRAINED: + case IB_EVENT_QP_LAST_WQE_REACHED: + break; + + /* These are considered fatal events */ + case IB_EVENT_PATH_MIG_ERR: + case IB_EVENT_QP_FATAL: + case IB_EVENT_QP_REQ_ERR: + case IB_EVENT_QP_ACCESS_ERR: + case IB_EVENT_DEVICE_FATAL: + default: + svc_xprt_deferred_close(xprt); + break; + } +} + +static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, + struct net *net) +{ + struct svcxprt_rdma *cma_xprt = kzalloc(sizeof *cma_xprt, GFP_KERNEL); + + if (!cma_xprt) { + dprintk("svcrdma: failed to create new transport\n"); + return NULL; + } + svc_xprt_init(net, &svc_rdma_class, &cma_xprt->sc_xprt, serv); + INIT_LIST_HEAD(&cma_xprt->sc_accept_q); + INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q); + init_llist_head(&cma_xprt->sc_send_ctxts); + init_llist_head(&cma_xprt->sc_recv_ctxts); + init_llist_head(&cma_xprt->sc_rw_ctxts); + init_waitqueue_head(&cma_xprt->sc_send_wait); + + spin_lock_init(&cma_xprt->sc_lock); + spin_lock_init(&cma_xprt->sc_rq_dto_lock); + spin_lock_init(&cma_xprt->sc_send_lock); + spin_lock_init(&cma_xprt->sc_rw_ctxt_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); + + return cma_xprt; +} + +static void +svc_rdma_parse_connect_private(struct svcxprt_rdma *newxprt, + struct rdma_conn_param *param) +{ + const struct rpcrdma_connect_private *pmsg = param->private_data; + + if (pmsg && + pmsg->cp_magic == rpcrdma_cmp_magic && + pmsg->cp_version == RPCRDMA_CMP_VERSION) { + newxprt->sc_snd_w_inv = pmsg->cp_flags & + RPCRDMA_CMP_F_SND_W_INV_OK; + + dprintk("svcrdma: client send_size %u, recv_size %u " + "remote inv %ssupported\n", + rpcrdma_decode_buffer_size(pmsg->cp_send_size), + rpcrdma_decode_buffer_size(pmsg->cp_recv_size), + newxprt->sc_snd_w_inv ? "" : "un"); + } +} + +/* + * This function handles the CONNECT_REQUEST event on a listening + * endpoint. It is passed the cma_id for the _new_ connection. The context in + * this cma_id is inherited from the listening cma_id and is the svc_xprt + * structure for the listening endpoint. + * + * This function creates a new xprt for the new connection and enqueues it on + * the accept queue for the listent xprt. When the listen thread is kicked, it + * will call the recvfrom method on the listen xprt which will accept the new + * connection. + */ +static void handle_connect_req(struct rdma_cm_id *new_cma_id, + struct rdma_conn_param *param) +{ + struct svcxprt_rdma *listen_xprt = new_cma_id->context; + struct svcxprt_rdma *newxprt; + struct sockaddr *sa; + + /* Create a new transport */ + newxprt = svc_rdma_create_xprt(listen_xprt->sc_xprt.xpt_server, + listen_xprt->sc_xprt.xpt_net); + if (!newxprt) + return; + newxprt->sc_cm_id = new_cma_id; + new_cma_id->context = newxprt; + svc_rdma_parse_connect_private(newxprt, param); + + /* Save client advertised inbound read limit for use later in accept. */ + newxprt->sc_ord = param->initiator_depth; + + sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; + newxprt->sc_xprt.xpt_remotelen = svc_addr_len(sa); + memcpy(&newxprt->sc_xprt.xpt_remote, sa, + newxprt->sc_xprt.xpt_remotelen); + snprintf(newxprt->sc_xprt.xpt_remotebuf, + sizeof(newxprt->sc_xprt.xpt_remotebuf) - 1, "%pISc", sa); + + /* The remote port is arbitrary and not under the control of the + * client ULP. Set it to a fixed value so that the DRC continues + * to be effective after a reconnect. + */ + rpc_set_port((struct sockaddr *)&newxprt->sc_xprt.xpt_remote, 0); + + sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; + svc_xprt_set_local(&newxprt->sc_xprt, sa, svc_addr_len(sa)); + + /* + * Enqueue the new transport on the accept queue of the listening + * transport + */ + spin_lock(&listen_xprt->sc_lock); + list_add_tail(&newxprt->sc_accept_q, &listen_xprt->sc_accept_q); + spin_unlock(&listen_xprt->sc_lock); + + set_bit(XPT_CONN, &listen_xprt->sc_xprt.xpt_flags); + svc_xprt_enqueue(&listen_xprt->sc_xprt); +} + +/** + * svc_rdma_listen_handler - Handle CM events generated on a listening endpoint + * @cma_id: the server's listener rdma_cm_id + * @event: details of the event + * + * Return values: + * %0: Do not destroy @cma_id + * %1: Destroy @cma_id (never returned here) + * + * NB: There is never a DEVICE_REMOVAL event for INADDR_ANY listeners. + */ +static int svc_rdma_listen_handler(struct rdma_cm_id *cma_id, + struct rdma_cm_event *event) +{ + switch (event->event) { + case RDMA_CM_EVENT_CONNECT_REQUEST: + handle_connect_req(cma_id, &event->param.conn); + break; + default: + break; + } + return 0; +} + +/** + * svc_rdma_cma_handler - Handle CM events on client connections + * @cma_id: the server's listener rdma_cm_id + * @event: details of the event + * + * Return values: + * %0: Do not destroy @cma_id + * %1: Destroy @cma_id (never returned here) + */ +static int svc_rdma_cma_handler(struct rdma_cm_id *cma_id, + struct rdma_cm_event *event) +{ + struct svcxprt_rdma *rdma = cma_id->context; + struct svc_xprt *xprt = &rdma->sc_xprt; + + switch (event->event) { + case RDMA_CM_EVENT_ESTABLISHED: + clear_bit(RDMAXPRT_CONN_PENDING, &rdma->sc_flags); + + /* Handle any requests that were received while + * CONN_PENDING was set. */ + svc_xprt_enqueue(xprt); + break; + case RDMA_CM_EVENT_DISCONNECTED: + case RDMA_CM_EVENT_DEVICE_REMOVAL: + svc_xprt_deferred_close(xprt); + break; + default: + break; + } + return 0; +} + +/* + * Create a listening RDMA service endpoint. + */ +static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, + struct net *net, + struct sockaddr *sa, int salen, + int flags) +{ + struct rdma_cm_id *listen_id; + struct svcxprt_rdma *cma_xprt; + int ret; + + if (sa->sa_family != AF_INET && sa->sa_family != AF_INET6) + return ERR_PTR(-EAFNOSUPPORT); + cma_xprt = svc_rdma_create_xprt(serv, net); + if (!cma_xprt) + return ERR_PTR(-ENOMEM); + set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags); + strcpy(cma_xprt->sc_xprt.xpt_remotebuf, "listener"); + + listen_id = rdma_create_id(net, svc_rdma_listen_handler, cma_xprt, + RDMA_PS_TCP, IB_QPT_RC); + if (IS_ERR(listen_id)) { + ret = PTR_ERR(listen_id); + goto err0; + } + + /* Allow both IPv4 and IPv6 sockets to bind a single port + * at the same time. + */ +#if IS_ENABLED(CONFIG_IPV6) + ret = rdma_set_afonly(listen_id, 1); + if (ret) + goto err1; +#endif + ret = rdma_bind_addr(listen_id, sa); + if (ret) + goto err1; + cma_xprt->sc_cm_id = listen_id; + + ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG); + if (ret) + goto err1; + + /* + * We need to use the address from the cm_id in case the + * caller specified 0 for the port number. + */ + sa = (struct sockaddr *)&cma_xprt->sc_cm_id->route.addr.src_addr; + svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen); + + return &cma_xprt->sc_xprt; + + err1: + rdma_destroy_id(listen_id); + err0: + kfree(cma_xprt); + return ERR_PTR(ret); +} + +/* + * This is the xpo_recvfrom function for listening endpoints. Its + * purpose is to accept incoming connections. The CMA callback handler + * has already created a new transport and attached it to the new CMA + * ID. + * + * There is a queue of pending connections hung on the listening + * transport. This queue contains the new svc_xprt structure. This + * function takes svc_xprt structures off the accept_q and completes + * the connection. + */ +static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) +{ + struct svcxprt_rdma *listen_rdma; + struct svcxprt_rdma *newxprt = NULL; + struct rdma_conn_param conn_param; + struct rpcrdma_connect_private pmsg; + struct ib_qp_init_attr qp_attr; + unsigned int ctxts, rq_depth; + struct ib_device *dev; + int ret = 0; + RPC_IFDEBUG(struct sockaddr *sap); + + listen_rdma = container_of(xprt, struct svcxprt_rdma, sc_xprt); + clear_bit(XPT_CONN, &xprt->xpt_flags); + /* Get the next entry off the accept list */ + spin_lock(&listen_rdma->sc_lock); + if (!list_empty(&listen_rdma->sc_accept_q)) { + newxprt = list_entry(listen_rdma->sc_accept_q.next, + struct svcxprt_rdma, sc_accept_q); + list_del_init(&newxprt->sc_accept_q); + } + if (!list_empty(&listen_rdma->sc_accept_q)) + set_bit(XPT_CONN, &listen_rdma->sc_xprt.xpt_flags); + spin_unlock(&listen_rdma->sc_lock); + if (!newxprt) + return NULL; + + dev = newxprt->sc_cm_id->device; + newxprt->sc_port_num = newxprt->sc_cm_id->port_num; + + /* Qualify the transport resource defaults with the + * capabilities of this particular device */ + /* Transport header, head iovec, tail iovec */ + newxprt->sc_max_send_sges = 3; + /* Add one SGE per page list entry */ + newxprt->sc_max_send_sges += (svcrdma_max_req_size / PAGE_SIZE) + 1; + if (newxprt->sc_max_send_sges > dev->attrs.max_send_sge) + newxprt->sc_max_send_sges = dev->attrs.max_send_sge; + newxprt->sc_max_req_size = svcrdma_max_req_size; + newxprt->sc_max_requests = svcrdma_max_requests; + newxprt->sc_max_bc_requests = svcrdma_max_bc_requests; + newxprt->sc_recv_batch = RPCRDMA_MAX_RECV_BATCH; + rq_depth = newxprt->sc_max_requests + newxprt->sc_max_bc_requests + + newxprt->sc_recv_batch; + if (rq_depth > dev->attrs.max_qp_wr) { + pr_warn("svcrdma: reducing receive depth to %d\n", + dev->attrs.max_qp_wr); + rq_depth = dev->attrs.max_qp_wr; + newxprt->sc_recv_batch = 1; + newxprt->sc_max_requests = rq_depth - 2; + newxprt->sc_max_bc_requests = 2; + } + newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests); + ctxts = rdma_rw_mr_factor(dev, newxprt->sc_port_num, RPCSVC_MAXPAGES); + ctxts *= newxprt->sc_max_requests; + newxprt->sc_sq_depth = rq_depth + ctxts; + if (newxprt->sc_sq_depth > dev->attrs.max_qp_wr) { + pr_warn("svcrdma: reducing send depth to %d\n", + dev->attrs.max_qp_wr); + newxprt->sc_sq_depth = dev->attrs.max_qp_wr; + } + atomic_set(&newxprt->sc_sq_avail, newxprt->sc_sq_depth); + + newxprt->sc_pd = ib_alloc_pd(dev, 0); + if (IS_ERR(newxprt->sc_pd)) { + trace_svcrdma_pd_err(newxprt, PTR_ERR(newxprt->sc_pd)); + goto errout; + } + newxprt->sc_sq_cq = ib_alloc_cq_any(dev, newxprt, newxprt->sc_sq_depth, + IB_POLL_WORKQUEUE); + if (IS_ERR(newxprt->sc_sq_cq)) + goto errout; + newxprt->sc_rq_cq = + ib_alloc_cq_any(dev, newxprt, rq_depth, IB_POLL_WORKQUEUE); + if (IS_ERR(newxprt->sc_rq_cq)) + goto errout; + + memset(&qp_attr, 0, sizeof qp_attr); + qp_attr.event_handler = qp_event_handler; + qp_attr.qp_context = &newxprt->sc_xprt; + qp_attr.port_num = newxprt->sc_port_num; + qp_attr.cap.max_rdma_ctxs = ctxts; + qp_attr.cap.max_send_wr = newxprt->sc_sq_depth - ctxts; + qp_attr.cap.max_recv_wr = rq_depth; + qp_attr.cap.max_send_sge = newxprt->sc_max_send_sges; + qp_attr.cap.max_recv_sge = 1; + qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR; + qp_attr.qp_type = IB_QPT_RC; + qp_attr.send_cq = newxprt->sc_sq_cq; + qp_attr.recv_cq = newxprt->sc_rq_cq; + dprintk("svcrdma: newxprt->sc_cm_id=%p, newxprt->sc_pd=%p\n", + newxprt->sc_cm_id, newxprt->sc_pd); + dprintk(" cap.max_send_wr = %d, cap.max_recv_wr = %d\n", + qp_attr.cap.max_send_wr, qp_attr.cap.max_recv_wr); + dprintk(" cap.max_send_sge = %d, cap.max_recv_sge = %d\n", + qp_attr.cap.max_send_sge, qp_attr.cap.max_recv_sge); + + ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr); + if (ret) { + trace_svcrdma_qp_err(newxprt, ret); + goto errout; + } + newxprt->sc_qp = newxprt->sc_cm_id->qp; + + if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) + newxprt->sc_snd_w_inv = false; + if (!rdma_protocol_iwarp(dev, newxprt->sc_port_num) && + !rdma_ib_or_roce(dev, newxprt->sc_port_num)) { + trace_svcrdma_fabric_err(newxprt, -EINVAL); + goto errout; + } + + if (!svc_rdma_post_recvs(newxprt)) + goto errout; + + /* Construct RDMA-CM private message */ + pmsg.cp_magic = rpcrdma_cmp_magic; + pmsg.cp_version = RPCRDMA_CMP_VERSION; + pmsg.cp_flags = 0; + pmsg.cp_send_size = pmsg.cp_recv_size = + rpcrdma_encode_buffer_size(newxprt->sc_max_req_size); + + /* Accept Connection */ + set_bit(RDMAXPRT_CONN_PENDING, &newxprt->sc_flags); + memset(&conn_param, 0, sizeof conn_param); + conn_param.responder_resources = 0; + conn_param.initiator_depth = min_t(int, newxprt->sc_ord, + dev->attrs.max_qp_init_rd_atom); + if (!conn_param.initiator_depth) { + ret = -EINVAL; + trace_svcrdma_initdepth_err(newxprt, ret); + goto errout; + } + conn_param.private_data = &pmsg; + conn_param.private_data_len = sizeof(pmsg); + rdma_lock_handler(newxprt->sc_cm_id); + newxprt->sc_cm_id->event_handler = svc_rdma_cma_handler; + ret = rdma_accept(newxprt->sc_cm_id, &conn_param); + rdma_unlock_handler(newxprt->sc_cm_id); + if (ret) { + trace_svcrdma_accept_err(newxprt, ret); + goto errout; + } + +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) + dprintk("svcrdma: new connection %p accepted:\n", newxprt); + sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; + dprintk(" local address : %pIS:%u\n", sap, rpc_get_port(sap)); + sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; + dprintk(" remote address : %pIS:%u\n", sap, rpc_get_port(sap)); + dprintk(" max_sge : %d\n", newxprt->sc_max_send_sges); + dprintk(" sq_depth : %d\n", newxprt->sc_sq_depth); + dprintk(" rdma_rw_ctxs : %d\n", ctxts); + dprintk(" max_requests : %d\n", newxprt->sc_max_requests); + dprintk(" ord : %d\n", conn_param.initiator_depth); +#endif + + return &newxprt->sc_xprt; + + errout: + /* Take a reference in case the DTO handler runs */ + svc_xprt_get(&newxprt->sc_xprt); + if (newxprt->sc_qp && !IS_ERR(newxprt->sc_qp)) + ib_destroy_qp(newxprt->sc_qp); + rdma_destroy_id(newxprt->sc_cm_id); + /* This call to put will destroy the transport */ + svc_xprt_put(&newxprt->sc_xprt); + return NULL; +} + +static void svc_rdma_detach(struct svc_xprt *xprt) +{ + struct svcxprt_rdma *rdma = + container_of(xprt, struct svcxprt_rdma, sc_xprt); + + rdma_disconnect(rdma->sc_cm_id); +} + +static void __svc_rdma_free(struct work_struct *work) +{ + struct svcxprt_rdma *rdma = + container_of(work, struct svcxprt_rdma, sc_work); + + /* This blocks until the Completion Queues are empty */ + if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) + ib_drain_qp(rdma->sc_qp); + + svc_rdma_flush_recv_queues(rdma); + + svc_rdma_destroy_rw_ctxts(rdma); + svc_rdma_send_ctxts_destroy(rdma); + svc_rdma_recv_ctxts_destroy(rdma); + + /* Destroy the QP if present (not a listener) */ + if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) + ib_destroy_qp(rdma->sc_qp); + + if (rdma->sc_sq_cq && !IS_ERR(rdma->sc_sq_cq)) + ib_free_cq(rdma->sc_sq_cq); + + if (rdma->sc_rq_cq && !IS_ERR(rdma->sc_rq_cq)) + ib_free_cq(rdma->sc_rq_cq); + + if (rdma->sc_pd && !IS_ERR(rdma->sc_pd)) + ib_dealloc_pd(rdma->sc_pd); + + /* Destroy the CM ID */ + rdma_destroy_id(rdma->sc_cm_id); + + kfree(rdma); +} + +static void svc_rdma_free(struct svc_xprt *xprt) +{ + struct svcxprt_rdma *rdma = + container_of(xprt, struct svcxprt_rdma, sc_xprt); + + INIT_WORK(&rdma->sc_work, __svc_rdma_free); + schedule_work(&rdma->sc_work); +} + +static int svc_rdma_has_wspace(struct svc_xprt *xprt) +{ + struct svcxprt_rdma *rdma = + container_of(xprt, struct svcxprt_rdma, sc_xprt); + + /* + * If there are already waiters on the SQ, + * return false. + */ + if (waitqueue_active(&rdma->sc_send_wait)) + return 0; + + /* Otherwise return true. */ + return 1; +} + +static void svc_rdma_secure_port(struct svc_rqst *rqstp) +{ + set_bit(RQ_SECURE, &rqstp->rq_flags); +} + +static void svc_rdma_kill_temp_xprt(struct svc_xprt *xprt) +{ +} |