From patchwork Fri Mar 20 12:16:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinpu Wang X-Patchwork-Id: 11448987 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 90A211894 for ; Fri, 20 Mar 2020 12:17:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6E9AC20777 for ; Fri, 20 Mar 2020 12:17:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cloud.ionos.com header.i=@cloud.ionos.com header.b="S92xj45b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727123AbgCTMRZ (ORCPT ); Fri, 20 Mar 2020 08:17:25 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:35217 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727145AbgCTMRZ (ORCPT ); Fri, 20 Mar 2020 08:17:25 -0400 Received: by mail-wm1-f68.google.com with SMTP id m3so6063215wmi.0 for ; Fri, 20 Mar 2020 05:17:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloud.ionos.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=pQadDjJRY523GqPhys0j71dWvQTQDG/mnIYpATqriY4=; b=S92xj45bq09/sGo70M3V4It7Bv3sRgKJWfdgwf3QYUhqwLsREui7xG7SQ7GkJqDXdv jC+3/2gSdRgQIn23kwZVu+MGDaP3m49/U1IvmIOZEde8tM7EonjAE4xWUk+TM2kZ8qv2 VOUcpILnnTU1nVuzOJ9TiFUeu/GxfKnPW/szf1RkZjqWmRv+GN6ICfYPCKZXf4qtCB73 FYxW5xPpt2TCrjVpXLWhNF4FBdN6DAubpGzWV65X45Z720WEjXTb1rr0g5cjAXuF5tZX KfW0sYMDil5/1EvW04TV5eRMZj8ANXbrL3ZkXFCs+xqdH+hMcMJ38oPWhdbNbELmOX+F BzkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=pQadDjJRY523GqPhys0j71dWvQTQDG/mnIYpATqriY4=; b=H2ySW9rEVC+tDP8E3TBk45AuZ/IiSQ0KNTk1IWDE5hjP6uapQ5+2C62bpKe6AZATux XWozmeAOz+Qa+WNlZ93LmjyVNEdAtSBfLMgmwpYS/q/NTfDWkSj7q9KkySS0uFYVgyHQ GpCkuFsmyjKAA7iG7dFd4F1CEgZUl0+5RyC7dKwvmmj0QqN+9SQL64xzZfjF579cY7aR ctikYJWy1m9dB3A9KymSnuKugR+RStyNsjZUZyJOyFsbGnwrpDi9M7+VzqJOzVoVSwvq AkwnIE7XYgIdzkx5jFYwOfrerJrzzwKLuMOwPeKPB8NqgYp7VqiD7yNUr7WQEorB6oEf LIQQ== X-Gm-Message-State: ANhLgQ1uUoJ0bU3AfCOx3rQZb9NBE1wnDW/4S3lAqNh4iH+sDzwN+Zrs rrb+XwbjLCqWvklze73dJ3qUkAY9ZKA= X-Google-Smtp-Source: ADFU+vtIkyr4x6pNCNvI80wC/E4VhoI0xe7nf351LlgEU57AaLz6jFAHG+I9V8O6/Lg5GQSTWJHAoA== X-Received: by 2002:a1c:68d5:: with SMTP id d204mr9842417wmc.15.1584706639661; Fri, 20 Mar 2020 05:17:19 -0700 (PDT) Received: from jwang-Latitude-5491.fritz.box ([2001:16b8:4927:3900:64cf:432e:192d:75a2]) by smtp.gmail.com with ESMTPSA id j39sm8593662wre.11.2020.03.20.05.17.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2020 05:17:19 -0700 (PDT) From: Jack Wang To: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org Cc: axboe@kernel.dk, hch@infradead.org, sagi@grimberg.me, bvanassche@acm.org, leon@kernel.org, dledford@redhat.com, jgg@ziepe.ca, danil.kipnis@cloud.ionos.com, jinpu.wang@cloud.ionos.com, rpenyaev@suse.de, pankaj.gupta@cloud.ionos.com Subject: [PATCH v11 12/26] RDMA/rtrs: server: sysfs interface functions Date: Fri, 20 Mar 2020 13:16:43 +0100 Message-Id: <20200320121657.1165-13-jinpu.wang@cloud.ionos.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200320121657.1165-1-jinpu.wang@cloud.ionos.com> References: <20200320121657.1165-1-jinpu.wang@cloud.ionos.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org This is the sysfs interface to rtrs sessions on server side: /sys/devices/virtual/rtrs-server// *** rtrs session accepted from a client peer | |- paths// *** established paths from a client in a session | |- disconnect | *** disconnect path | |- hca_name | *** HCA name | |- hca_port | *** HCA port | |- stats/ *** current path statistics | |- rdma Signed-off-by: Danil Kipnis Signed-off-by: Jack Wang --- drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 298 +++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c new file mode 100644 index 000000000000..da0ed9dbc045 --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c @@ -0,0 +1,298 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * RDMA Transport Layer + * + * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. + */ +#undef pr_fmt +#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt + +#include "rtrs-pri.h" +#include "rtrs-srv.h" +#include "rtrs-log.h" + +static struct kobj_type ktype = { + .sysfs_ops = &kobj_sysfs_ops, +}; + +static ssize_t rtrs_srv_disconnect_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n", + attr->attr.name); +} + +static ssize_t rtrs_srv_disconnect_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct rtrs_srv_sess *sess; + struct rtrs_sess *s; + char str[MAXHOSTNAMELEN]; + + sess = container_of(kobj, struct rtrs_srv_sess, kobj); + s = &sess->s; + if (!sysfs_streq(buf, "1")) { + rtrs_err(s, "%s: invalid value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + + sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str)); + + rtrs_info(s, "disconnect for path %s requested\n", str); + close_sess(sess); + + return count; +} + +static struct kobj_attribute rtrs_srv_disconnect_attr = + __ATTR(disconnect, 0644, + rtrs_srv_disconnect_show, rtrs_srv_disconnect_store); + +static ssize_t rtrs_srv_hca_port_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_srv_sess *sess; + struct rtrs_con *usr_con; + + sess = container_of(kobj, typeof(*sess), kobj); + usr_con = sess->s.con[0]; + + return scnprintf(page, PAGE_SIZE, "%u\n", + usr_con->cm_id->port_num); +} + +static struct kobj_attribute rtrs_srv_hca_port_attr = + __ATTR(hca_port, 0444, rtrs_srv_hca_port_show, NULL); + +static ssize_t rtrs_srv_hca_name_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_srv_sess *sess; + + sess = container_of(kobj, struct rtrs_srv_sess, kobj); + + return scnprintf(page, PAGE_SIZE, "%s\n", + sess->s.dev->ib_dev->name); +} + +static struct kobj_attribute rtrs_srv_hca_name_attr = + __ATTR(hca_name, 0444, rtrs_srv_hca_name_show, NULL); + +static ssize_t rtrs_srv_src_addr_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_srv_sess *sess; + int cnt; + + sess = container_of(kobj, struct rtrs_srv_sess, kobj); + cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, + page, PAGE_SIZE); + return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n"); +} + +static struct kobj_attribute rtrs_srv_src_addr_attr = + __ATTR(src_addr, 0444, rtrs_srv_src_addr_show, NULL); + +static ssize_t rtrs_srv_dst_addr_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_srv_sess *sess; + int cnt; + + sess = container_of(kobj, struct rtrs_srv_sess, kobj); + cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, + page, PAGE_SIZE); + return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n"); +} + +static struct kobj_attribute rtrs_srv_dst_addr_attr = + __ATTR(dst_addr, 0444, rtrs_srv_dst_addr_show, NULL); + +static struct attribute *rtrs_srv_sess_attrs[] = { + &rtrs_srv_hca_name_attr.attr, + &rtrs_srv_hca_port_attr.attr, + &rtrs_srv_src_addr_attr.attr, + &rtrs_srv_dst_addr_attr.attr, + &rtrs_srv_disconnect_attr.attr, + NULL, +}; + +static struct attribute_group rtrs_srv_sess_attr_group = { + .attrs = rtrs_srv_sess_attrs, +}; + +STAT_ATTR(struct rtrs_srv_sess, rdma, + rtrs_srv_stats_rdma_to_str, + rtrs_srv_reset_rdma_stats); + +static struct attribute *rtrs_srv_stats_attrs[] = { + &rdma_attr.attr, + NULL, +}; + +static struct attribute_group rtrs_srv_stats_attr_group = { + .attrs = rtrs_srv_stats_attrs, +}; + +static void rtrs_srv_dev_release(struct device *dev) +{ + struct rtrs_srv *srv = container_of(dev, struct rtrs_srv, dev); + + kfree(srv); +} + +static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess) +{ + struct rtrs_srv *srv = sess->srv; + int err = 0; + + mutex_lock(&srv->paths_mutex); + if (srv->dev_ref++) { + /* + * Device needs to be registered only on the first session + */ + goto unlock; + } + srv->dev.class = rtrs_dev_class; + srv->dev.release = rtrs_srv_dev_release; + err = dev_set_name(&srv->dev, "%s", sess->s.sessname); + if (err) + goto unlock; + + /* + * Suppress user space notification until + * sysfs files are created + */ + dev_set_uevent_suppress(&srv->dev, true); + err = device_register(&srv->dev); + if (err) { + pr_err("device_register(): %d\n", err); + goto put; + } + err = kobject_init_and_add(&srv->kobj_paths, &ktype, + &srv->dev.kobj, "paths"); + if (err) { + pr_err("kobject_init_and_add(): %d\n", err); + device_unregister(&srv->dev); + goto unlock; + } + dev_set_uevent_suppress(&srv->dev, false); + kobject_uevent(&srv->dev.kobj, KOBJ_ADD); + goto unlock; + +put: + put_device(&srv->dev); +unlock: + mutex_unlock(&srv->paths_mutex); + + return err; +} + +static void +rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_sess *sess) +{ + struct rtrs_srv *srv = sess->srv; + + mutex_lock(&srv->paths_mutex); + if (!--srv->dev_ref) { + kobject_del(&srv->kobj_paths); + kobject_put(&srv->kobj_paths); + mutex_unlock(&srv->paths_mutex); + device_unregister(&srv->dev); + } else { + mutex_unlock(&srv->paths_mutex); + } +} + +static int rtrs_srv_create_stats_files(struct rtrs_srv_sess *sess) +{ + int err; + struct rtrs_sess *s = &sess->s; + + err = kobject_init_and_add(&sess->kobj_stats, &ktype, + &sess->kobj, "stats"); + if (err) { + rtrs_err(s, "kobject_init_and_add(): %d\n", err); + return err; + } + err = sysfs_create_group(&sess->kobj_stats, + &rtrs_srv_stats_attr_group); + if (err) { + rtrs_err(s, "sysfs_create_group(): %d\n", err); + goto err; + } + + return 0; + +err: + kobject_del(&sess->kobj_stats); + kobject_put(&sess->kobj_stats); + + return err; +} + +int rtrs_srv_create_sess_files(struct rtrs_srv_sess *sess) +{ + struct rtrs_srv *srv = sess->srv; + struct rtrs_sess *s = &sess->s; + char str[NAME_MAX]; + int err, cnt; + + cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, + str, sizeof(str)); + cnt += scnprintf(str + cnt, sizeof(str) - cnt, "@"); + sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, + str + cnt, sizeof(str) - cnt); + + err = rtrs_srv_create_once_sysfs_root_folders(sess); + if (err) + return err; + + err = kobject_init_and_add(&sess->kobj, &ktype, &srv->kobj_paths, + "%s", str); + if (err) { + rtrs_err(s, "kobject_init_and_add(): %d\n", err); + goto destroy_root; + } + err = sysfs_create_group(&sess->kobj, &rtrs_srv_sess_attr_group); + if (err) { + rtrs_err(s, "sysfs_create_group(): %d\n", err); + goto put_kobj; + } + err = rtrs_srv_create_stats_files(sess); + if (err) + goto remove_group; + + return 0; + +remove_group: + sysfs_remove_group(&sess->kobj, &rtrs_srv_sess_attr_group); +put_kobj: + kobject_del(&sess->kobj); + kobject_put(&sess->kobj); +destroy_root: + rtrs_srv_destroy_once_sysfs_root_folders(sess); + + return err; +} + +void rtrs_srv_destroy_sess_files(struct rtrs_srv_sess *sess) +{ + if (sess->kobj.state_in_sysfs) { + kobject_del(&sess->kobj_stats); + kobject_put(&sess->kobj_stats); + kobject_del(&sess->kobj); + kobject_put(&sess->kobj); + + rtrs_srv_destroy_once_sysfs_root_folders(sess); + } +}