From patchwork Wed Feb 11 15:06:40 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shachar Raindel X-Patchwork-Id: 5813111 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CBC95BF440 for ; Wed, 11 Feb 2015 15:11:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 47D3520218 for ; Wed, 11 Feb 2015 15:11:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E1CA20225 for ; Wed, 11 Feb 2015 15:11:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753765AbbBKPLZ (ORCPT ); Wed, 11 Feb 2015 10:11:25 -0500 Received: from mailp.voltaire.com ([193.47.165.129]:53687 "EHLO mellanox.co.il" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753756AbbBKPLX (ORCPT ); Wed, 11 Feb 2015 10:11:23 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from raindel@mellanox.com) with ESMTPS (AES256-SHA encrypted); 11 Feb 2015 17:09:25 +0200 Received: from gen-l-vrt-067.mtl.labs.mlnx (gen-l-vrt-067.mtl.labs.mlnx [10.137.67.1]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id t1BF9PXK022191; Wed, 11 Feb 2015 17:09:25 +0200 From: Shachar Raindel To: roland@kernel.org, sean.hefty@intel.com Cc: linux-rdma@vger.kernel.org, netdev@vger.kernel.org, liranl@mellanox.com, guysh@mellanox.com, haggaie@mellanox.com, yotamke@mellanox.com, raindel@mellanox.com Subject: [PATCH v1 06/10] IB/cm: Add network namespace support Date: Wed, 11 Feb 2015 17:06:40 +0200 Message-Id: <1423667204-8807-7-git-send-email-raindel@mellanox.com> X-Mailer: git-send-email 1.7.11.2 In-Reply-To: <1423667204-8807-1-git-send-email-raindel@mellanox.com> References: <1423667204-8807-1-git-send-email-raindel@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Guy Shapiro Add namespace support to the IB-CM layer. - Each CM-ID now has a network namespace it is associated with, assigned at creation. This namespace is used as needed during subsequent action on the CM-ID or related objects. - All of the relevant calls to ib_addr and ib_core were updated to use the namespace from the CM-ID. External APIs were extended as needed to allow specifying the namespace where relevant. - The listening service ID table is now also indexed by the CM-ID namespace. - For incoming connection requests, we use the connection parameters to select namespace. The namespace is matched when looking for listening service ID. To preserve current behavior pass init_net to ib_cm wherever network namespace function parameters were added. The ib_cm_create_id interface now takes a reference to the relevant network namespace. CM-IDs created by accepting a connection for a listening CM-ID will also take a reference to the namespace. When the ID is destroyed, the namespace reference is released. Signed-off-by: Guy Shapiro Signed-off-by: Haggai Eran Signed-off-by: Yotam Kenneth Signed-off-by: Shachar Raindel --- drivers/infiniband/core/cm.c | 124 ++++++++++++++++++++++++-------- drivers/infiniband/core/cma.c | 8 ++- drivers/infiniband/core/ucm.c | 3 +- drivers/infiniband/ulp/ipoib/ipoib_cm.c | 21 +++++- drivers/infiniband/ulp/srp/ib_srp.c | 2 +- drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +- include/rdma/ib_cm.h | 7 +- 7 files changed, 130 insertions(+), 37 deletions(-) diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index efc5cff..75c6ac9 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -241,6 +241,8 @@ struct cm_id_private { u8 service_timeout; u8 target_ack_delay; + struct net *net; /* A network namespace that the ID belongs to */ + struct list_head work_list; atomic_t work_count; }; @@ -347,12 +349,13 @@ static void cm_set_private_data(struct cm_id_private *cm_id_priv, } static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, - struct ib_grh *grh, struct cm_av *av) + struct ib_grh *grh, struct cm_av *av, + struct net *net) { av->port = port; av->pkey_index = wc->pkey_index; ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc, - grh, &av->ah_attr, &init_net); + grh, &av->ah_attr, net); } static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) @@ -521,10 +524,15 @@ static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) if ((cur_cm_id_priv->id.service_mask & service_id) == (service_mask & cur_cm_id_priv->id.service_id) && (cm_id_priv->id.device == cur_cm_id_priv->id.device) && - !data_cmp) + !data_cmp && + net_eq(cm_id_priv->net, cur_cm_id_priv->net)) return cur_cm_id_priv; - if (cm_id_priv->id.device < cur_cm_id_priv->id.device) + if (cm_id_priv->net < cur_cm_id_priv->net) + link = &(*link)->rb_left; + else if (cm_id_priv->net > cur_cm_id_priv->net) + link = &(*link)->rb_right; + else if (cm_id_priv->id.device < cur_cm_id_priv->id.device) link = &(*link)->rb_left; else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) link = &(*link)->rb_right; @@ -544,7 +552,8 @@ static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv) static struct cm_id_private * cm_find_listen(struct ib_device *device, __be64 service_id, - u8 *private_data) + u8 *private_data, + struct net *net) { struct rb_node *node = cm.listen_service_table.rb_node; struct cm_id_private *cm_id_priv; @@ -556,10 +565,14 @@ static struct cm_id_private * cm_find_listen(struct ib_device *device, cm_id_priv->compare_data); if ((cm_id_priv->id.service_mask & service_id) == cm_id_priv->id.service_id && - (cm_id_priv->id.device == device) && !data_cmp) + (cm_id_priv->id.device == device) && !data_cmp && + net_eq(cm_id_priv->net, net)) return cm_id_priv; - - if (device < cm_id_priv->id.device) + if (net < cm_id_priv->net) + node = node->rb_left; + else if (net > cm_id_priv->net) + node = node->rb_right; + else if (device < cm_id_priv->id.device) node = node->rb_left; else if (device > cm_id_priv->id.device) node = node->rb_right; @@ -857,7 +870,8 @@ EXPORT_SYMBOL(cm_save_net_info); struct ib_cm_id *ib_create_cm_id(struct ib_device *device, ib_cm_handler cm_handler, - void *context) + void *context, + struct net *net) { struct cm_id_private *cm_id_priv; int ret; @@ -875,6 +889,8 @@ struct ib_cm_id *ib_create_cm_id(struct ib_device *device, if (ret) goto error; + cm_id_priv->net = get_net(net); + spin_lock_init(&cm_id_priv->lock); init_completion(&cm_id_priv->comp); INIT_LIST_HEAD(&cm_id_priv->work_list); @@ -1078,6 +1094,7 @@ retest: cm_free_work(work); kfree(cm_id_priv->compare_data); kfree(cm_id_priv->private_data); + put_net(cm_id_priv->net); kfree(cm_id_priv); } @@ -1597,7 +1614,8 @@ free: cm_free_msg(msg); } static struct cm_id_private * cm_match_req(struct cm_work *work, - struct cm_id_private *cm_id_priv) + struct cm_id_private *cm_id_priv, + struct net *net) { struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; struct cm_timewait_info *timewait_info; @@ -1633,7 +1651,8 @@ static struct cm_id_private * cm_match_req(struct cm_work *work, /* Find matching listen request. */ listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, req_msg->service_id, - req_msg->private_data); + req_msg->private_data, + net); if (!listen_cm_id_priv) { cm_cleanup_timewait(cm_id_priv->timewait_info); spin_unlock_irq(&cm.lock); @@ -1679,24 +1698,58 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) } } +static int cm_is_cma_service_id(__be64 service_id) +{ + return (IB_CMA_SERVICE_ID_MASK & service_id) == IB_CMA_SERVICE_ID; +} + +static struct net *cm_get_net_ns(struct cm_work *work, __be64 service_id, + __be16 pkey) +{ + struct sockaddr_storage addr_storage; + struct sockaddr *listen_addr; + + if (cm_is_cma_service_id(service_id)) { + listen_addr = (struct sockaddr *)&addr_storage; + cm_save_ip_info(listen_addr, NULL, work); + } else { + /* On RoCE we could extend this branch to determine the + * destination IP from the incoming packet headers, and add + * support for services that are not RDMA IP CM compliant. */ + listen_addr = NULL; + } + + return ib_get_net_ns_by_port_pkey_ip(work->port->cm_dev->ib_device, + work->port->port_num, + be16_to_cpu(pkey), + listen_addr); +} static int cm_req_handler(struct cm_work *work) { struct ib_cm_id *cm_id; struct cm_id_private *cm_id_priv, *listen_cm_id_priv; struct cm_req_msg *req_msg; + struct net *net; int ret; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; + work->cm_event.private_data = req_msg->private_data; - cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); - if (IS_ERR(cm_id)) - return PTR_ERR(cm_id); + net = cm_get_net_ns(work, req_msg->service_id, req_msg->pkey); + + cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL, net); + /* cm_id took a reference to net, so no need to hold it anymore */ + put_net(net); + if (IS_ERR(cm_id)) { + ret = PTR_ERR(cm_id); + goto out; + } cm_id_priv = container_of(cm_id, struct cm_id_private, id); cm_id_priv->id.remote_id = req_msg->local_comm_id; cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, - &cm_id_priv->av); + &cm_id_priv->av, net); cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> id.local_id); if (IS_ERR(cm_id_priv->timewait_info)) { @@ -1707,7 +1760,7 @@ static int cm_req_handler(struct cm_work *work) cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid; cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg); - listen_cm_id_priv = cm_match_req(work, cm_id_priv); + listen_cm_id_priv = cm_match_req(work, cm_id_priv, net); if (!listen_cm_id_priv) { ret = -EINVAL; kfree(cm_id_priv->timewait_info); @@ -1766,6 +1819,7 @@ rejected: cm_deref_id(listen_cm_id_priv); destroy: ib_destroy_cm_id(cm_id); +out: return ret; } @@ -2900,7 +2954,7 @@ static int cm_lap_handler(struct cm_work *work) cm_id_priv->tid = lap_msg->hdr.tid; cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, - &cm_id_priv->av); + &cm_id_priv->av, cm_id_priv->net); cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av); ret = atomic_inc_and_test(&cm_id_priv->work_count); if (!ret) @@ -3150,21 +3204,31 @@ static int cm_sidr_req_handler(struct cm_work *work) struct cm_id_private *cm_id_priv, *cur_cm_id_priv; struct cm_sidr_req_msg *sidr_req_msg; struct ib_wc *wc; + struct net *net; + int retval; + + sidr_req_msg = (struct cm_sidr_req_msg *) + work->mad_recv_wc->recv_buf.mad; + work->cm_event.private_data = sidr_req_msg->private_data; + + net = cm_get_net_ns(work, sidr_req_msg->service_id, sidr_req_msg->pkey); - cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL); - if (IS_ERR(cm_id)) - return PTR_ERR(cm_id); + cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL, net); + /* cm_id took a reference to net, so no need to hold it anymore */ + put_net(net); + if (IS_ERR(cm_id)) { + retval = PTR_ERR(cm_id); + goto out; + } cm_id_priv = container_of(cm_id, struct cm_id_private, id); /* Record SGID/SLID and request ID for lookup. */ - sidr_req_msg = (struct cm_sidr_req_msg *) - work->mad_recv_wc->recv_buf.mad; wc = work->mad_recv_wc->wc; cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid); cm_id_priv->av.dgid.global.interface_id = 0; cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, - &cm_id_priv->av); + &cm_id_priv->av, net); cm_id_priv->id.remote_id = sidr_req_msg->request_id; cm_id_priv->tid = sidr_req_msg->hdr.tid; atomic_inc(&cm_id_priv->work_count); @@ -3175,16 +3239,19 @@ static int cm_sidr_req_handler(struct cm_work *work) spin_unlock_irq(&cm.lock); atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. counter[CM_SIDR_REQ_COUNTER]); - goto out; /* Duplicate message. */ + retval = -EINVAL; /* Duplicate message. */ + goto out_id; } cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; cur_cm_id_priv = cm_find_listen(cm_id->device, sidr_req_msg->service_id, - sidr_req_msg->private_data); + sidr_req_msg->private_data, + net); if (!cur_cm_id_priv) { spin_unlock_irq(&cm.lock); cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED); - goto out; /* No match. */ + retval = -EINVAL; /* No match. */ + goto out_id; } atomic_inc(&cur_cm_id_priv->refcount); atomic_inc(&cm_id_priv->refcount); @@ -3199,9 +3266,10 @@ static int cm_sidr_req_handler(struct cm_work *work) cm_process_work(cm_id_priv, work); cm_deref_id(cur_cm_id_priv); return 0; -out: +out_id: ib_destroy_cm_id(&cm_id_priv->id); - return -EINVAL; +out: + return retval; } static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 9f6faeb..1ce84a0 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -1456,7 +1456,8 @@ static int cma_ib_listen(struct rdma_id_private *id_priv) __be64 svc_id; int ret; - id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv); + id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv, + &init_net); if (IS_ERR(id)) return PTR_ERR(id); @@ -2606,7 +2607,7 @@ static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, } id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler, - id_priv); + id_priv, &init_net); if (IS_ERR(id)) { ret = PTR_ERR(id); goto out; @@ -2655,7 +2656,8 @@ static int cma_connect_ib(struct rdma_id_private *id_priv, memcpy(private_data + offset, conn_param->private_data, conn_param->private_data_len); - id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv); + id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv, + &init_net); if (IS_ERR(id)) { ret = PTR_ERR(id); goto out; diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c index f2f6393..9604ab0 100644 --- a/drivers/infiniband/core/ucm.c +++ b/drivers/infiniband/core/ucm.c @@ -489,7 +489,8 @@ static ssize_t ib_ucm_create_id(struct ib_ucm_file *file, ctx->uid = cmd.uid; ctx->cm_id = ib_create_cm_id(file->device->ib_dev, - ib_ucm_event_handler, ctx); + ib_ucm_event_handler, ctx, + &init_net); if (IS_ERR(ctx->cm_id)) { result = PTR_ERR(ctx->cm_id); goto err1; diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c index 933efce..749b65b 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c @@ -846,7 +846,15 @@ int ipoib_cm_dev_open(struct net_device *dev) if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) return 0; - priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); + /* + * The IPoIB CM ID should always be in the init_net namespace. + * It is using a service ID which is not in the RDMA IP CM + * range. Furthermore, it is guaranteed that this service ID + * will be unique in the machine, as it is based on the UD QP + * number. + */ + priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev, + &init_net); if (IS_ERR(priv->cm.id)) { printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); ret = PTR_ERR(priv->cm.id); @@ -1130,7 +1138,16 @@ static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, goto err_qp; } - p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); + /* + * The IPoIB CM ID should always be in the init_net namespace. + * + * The target for connection is specified by an explicit GID, + * which is machine global and not specific for the namespace + * the device resides at. The service ID is also guaranteed to + * be per machine unique, and therefore init_net is the right + * namespace. + */ + p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p, &init_net); if (IS_ERR(p->id)) { ret = PTR_ERR(p->id); ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 0747c05..3b418be 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -294,7 +294,7 @@ static int srp_new_cm_id(struct srp_rdma_ch *ch) struct ib_cm_id *new_cm_id; new_cm_id = ib_create_cm_id(target->srp_host->srp_dev->dev, - srp_cm_handler, ch); + srp_cm_handler, ch, &init_net); if (IS_ERR(new_cm_id)) return PTR_ERR(new_cm_id); diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index 7867bd5..c0a1de3 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -3247,7 +3247,7 @@ static void srpt_add_one(struct ib_device *device) if (!srpt_service_guid) srpt_service_guid = be64_to_cpu(device->node_guid); - sdev->cm_id = ib_create_cm_id(device, srpt_cm_handler, sdev); + sdev->cm_id = ib_create_cm_id(device, srpt_cm_handler, sdev, &init_net); if (IS_ERR(sdev->cm_id)) goto err_srq; diff --git a/include/rdma/ib_cm.h b/include/rdma/ib_cm.h index 0e49933..a22ffa3 100644 --- a/include/rdma/ib_cm.h +++ b/include/rdma/ib_cm.h @@ -369,13 +369,18 @@ struct ib_cm_id { * @cm_handler: Callback invoked to notify the user of CM events. * @context: User specified context associated with the communication * identifier. + * @net: Network namespace associated with the cm_id. * * Communication identifiers are used to track connection states, service * ID resolution requests, and listen requests. + * + * The created CM ID will hold a reference on the network namespace until its + * destruction. */ struct ib_cm_id *ib_create_cm_id(struct ib_device *device, ib_cm_handler cm_handler, - void *context); + void *context, + struct net *net); /** * ib_destroy_cm_id - Destroy a connection identifier.