From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63E76C43613 for ; Thu, 20 Jun 2019 15:03:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24E5620673 for ; Thu, 20 Jun 2019 15:03:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HC7sekV1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726697AbfFTPDx (ORCPT ); Thu, 20 Jun 2019 11:03:53 -0400 Received: from mail-ed1-f67.google.com ([209.85.208.67]:42659 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731980AbfFTPDw (ORCPT ); Thu, 20 Jun 2019 11:03:52 -0400 Received: by mail-ed1-f67.google.com with SMTP id z25so5159922edq.9; Thu, 20 Jun 2019 08:03:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2yNcc8ZaMu8TtuEuh5OtY4U6SuUz17nXMGfipxJihnA=; b=HC7sekV14waH9OjfpPn3ea90UTF6oYW/1VCZZnouZ4I8Bu4DF9rjaCMaG66Pa+d4hv 0fcEU/5GevvHubCjH28nEO1vJqvrJcb8aKZ/i6FBijz0NW05iXKl2J+NLxE6nh1TH3Np r11Przujy992bcIidrc2ihZHTzRUpKwNoY1epLMtxKa67pL5mi95Ze1luL2Lip7c5kEF +zelQobLuUvL1RIz7am/93o2GGRk9/xIegu6OStoAhuZm1bWGQ1S1It6AiN9yd+lYQOz V5RnYWYf2ZhefXuWgI6brR7DBhEmljNPDOJBCm5iS6AZBTF99qknY+oksVnyPwYXya1n jAyQ== 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=2yNcc8ZaMu8TtuEuh5OtY4U6SuUz17nXMGfipxJihnA=; b=MkwdI/sOxmatrb6ObU3Kp+pk7XF4Duxx0xGQwi4JKekcvmOg1eQovidynLa+eW+lPw vm0mHObfJanMW1IfTQ+yWxHfp0J6jM55SRwvdkj2do6+bvYLZHCxO6CfXgaQlTL8AZeF xhb9WjzEvaQVCVPXObB6hRS0G1XXGhBOBPEBV1EeqbP9DCnuf/WMAfk5PZbgx1Xxix9A Yn3oRq1brw0SEHbyFrkLBb/YN5GonoP2JwDFWa2Ok/j2V+vprMF9SB6Uh256otvXcH8m 7TbEOcybp5MPkQtfHEbvebah/hBZiC0mDlY6gUnfrzwH2BeAL8h02rEFFOyhFJFRbH1H xK7g== X-Gm-Message-State: APjAAAXSymJKIZPWkGE2sn8tB1ZTOtE5QeqoBY3JxG1dtT6NCwwB7NSz 83ndJ9sExnL2sR5rHR5veg+Fae/QTb4= X-Google-Smtp-Source: APXvYqxrkEfaYmUWV53VmyAKTIjUguZKfw+zA/Tftbn7ZC2q8gXYzXSggc45vQQ8w5AraaduWb3U/w== X-Received: by 2002:a17:906:7e4b:: with SMTP id z11mr56387274ejr.214.1561043029724; Thu, 20 Jun 2019 08:03:49 -0700 (PDT) Received: from jwang-Latitude-5491.pb.local ([62.217.45.26]) by smtp.gmail.com with ESMTPSA id a20sm3855817ejj.21.2019.06.20.08.03.48 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 20 Jun 2019 08:03:49 -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, jgg@mellanox.com, dledford@redhat.com, danil.kipnis@cloud.ionos.com, rpenyaev@suse.de, Roman Pen , Jack Wang Subject: [PATCH v4 08/25] ibtrs: client: sysfs interface functions Date: Thu, 20 Jun 2019 17:03:20 +0200 Message-Id: <20190620150337.7847-9-jinpuwang@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190620150337.7847-1-jinpuwang@gmail.com> References: <20190620150337.7847-1-jinpuwang@gmail.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Roman Pen This is the sysfs interface to IBTRS sessions on client side: /sys/devices/virtual/ibtrs-client// *** IBTRS session created by ibtrs_clt_open() API call | |- max_reconnect_attempts | *** number of reconnect attempts for session | |- add_path | *** adds another connection path into IBTRS session | |- paths// *** established paths to server in a session | |- disconnect | *** disconnect path | |- reconnect | *** reconnect path | |- remove_path | *** remove current path | |- state | *** retrieve current path state | |- hca_port | *** HCA port number | |- hca_name | *** HCA name | |- stats/ *** current path statistics | |- cpu_migration |- rdma |- rdma_lat |- reconnects |- reset_all |- sg_entries |- wc_completions Signed-off-by: Danil Kipnis Signed-off-by: Jack Wang --- .../infiniband/ulp/ibtrs/ibtrs-clt-sysfs.c | 514 ++++++++++++++++++ 1 file changed, 514 insertions(+) create mode 100644 drivers/infiniband/ulp/ibtrs/ibtrs-clt-sysfs.c diff --git a/drivers/infiniband/ulp/ibtrs/ibtrs-clt-sysfs.c b/drivers/infiniband/ulp/ibtrs/ibtrs-clt-sysfs.c new file mode 100644 index 000000000000..1f7b6c28e6b4 --- /dev/null +++ b/drivers/infiniband/ulp/ibtrs/ibtrs-clt-sysfs.c @@ -0,0 +1,514 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * InfiniBand Transport Layer + * + * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved. + * Authors: Fabian Holler + * Jack Wang + * Kleber Souza + * Danil Kipnis + * Roman Penyaev + * Milind Dumbare + * + * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved. + * Authors: Danil Kipnis + * Roman Penyaev + * + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * Authors: Roman Penyaev + * Jack Wang + * Danil Kipnis + */ + +#undef pr_fmt +#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt + +#include "ibtrs-pri.h" +#include "ibtrs-clt.h" +#include "ibtrs-log.h" + +#define MIN_MAX_RECONN_ATT -1 +#define MAX_MAX_RECONN_ATT 9999 + +static struct kobj_type ktype = { + .sysfs_ops = &kobj_sysfs_ops, +}; + +static ssize_t max_reconnect_attempts_show(struct device *dev, + struct device_attribute *attr, + char *page) +{ + struct ibtrs_clt *clt; + + clt = container_of(dev, struct ibtrs_clt, dev); + + return sprintf(page, "%d\n", ibtrs_clt_get_max_reconnect_attempts(clt)); +} + +static ssize_t max_reconnect_attempts_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct ibtrs_clt *clt; + int value; + int ret; + + clt = container_of(dev, struct ibtrs_clt, dev); + + ret = kstrtoint(buf, 10, &value); + if (unlikely(ret)) { + ibtrs_err(clt, "%s: failed to convert string '%s' to int\n", + attr->attr.name, buf); + return ret; + } + if (unlikely(value > MAX_MAX_RECONN_ATT || + value < MIN_MAX_RECONN_ATT)) { + ibtrs_err(clt, "%s: invalid range" + " (provided: '%s', accepted: min: %d, max: %d)\n", + attr->attr.name, buf, MIN_MAX_RECONN_ATT, + MAX_MAX_RECONN_ATT); + return -EINVAL; + } + ibtrs_clt_set_max_reconnect_attempts(clt, value); + + return count; +} + +static DEVICE_ATTR_RW(max_reconnect_attempts); + +static ssize_t mpath_policy_show(struct device *dev, + struct device_attribute *attr, + char *page) +{ + struct ibtrs_clt *clt; + + clt = container_of(dev, struct ibtrs_clt, dev); + + switch (clt->mp_policy) { + case MP_POLICY_RR: + return sprintf(page, "round-robin (RR: %d)\n", clt->mp_policy); + case MP_POLICY_MIN_INFLIGHT: + return sprintf(page, "min-inflight (MI: %d)\n", clt->mp_policy); + default: + return sprintf(page, "Unknown (%d)\n", clt->mp_policy); + } +} + +static ssize_t mpath_policy_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct ibtrs_clt *clt; + int value; + int ret; + + clt = container_of(dev, struct ibtrs_clt, dev); + + ret = kstrtoint(buf, 10, &value); + if (!ret && (value == MP_POLICY_RR || + value == MP_POLICY_MIN_INFLIGHT)) { + clt->mp_policy = value; + return count; + } + + if (!strncasecmp(buf, "round-robin", 11) || + !strncasecmp(buf, "rr", 2)) + clt->mp_policy = MP_POLICY_RR; + else if (!strncasecmp(buf, "min-inflight", 12) || + !strncasecmp(buf, "mi", 2)) + clt->mp_policy = MP_POLICY_MIN_INFLIGHT; + else + return -EINVAL; + + return count; +} + +static DEVICE_ATTR_RW(mpath_policy); + +static ssize_t add_path_show(struct device *dev, + struct device_attribute *attr, char *page) +{ + return scnprintf(page, PAGE_SIZE, "Usage: echo" + " [,] > %s\n\n" + "*addr ::= [ ip: | gid: ]\n", + attr->attr.name); +} + +static ssize_t add_path_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sockaddr_storage srcaddr, dstaddr; + struct ibtrs_addr addr = { + .src = &srcaddr, + .dst = &dstaddr + }; + struct ibtrs_clt *clt; + const char *nl; + size_t len; + int err; + + clt = container_of(dev, struct ibtrs_clt, dev); + + nl = strchr(buf, '\n'); + if (nl) + len = nl - buf; + else + len = count; + err = ibtrs_addr_to_sockaddr(buf, len, clt->port, &addr); + if (unlikely(err)) + return -EINVAL; + + err = ibtrs_clt_create_path_from_sysfs(clt, &addr); + if (unlikely(err)) + return err; + + return count; +} + +static DEVICE_ATTR_RW(add_path); + +static ssize_t ibtrs_clt_state_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + struct ibtrs_clt_sess *sess; + + sess = container_of(kobj, struct ibtrs_clt_sess, kobj); + if (ibtrs_clt_sess_is_connected(sess)) + return sprintf(page, "connected\n"); + + return sprintf(page, "disconnected\n"); +} + +static struct kobj_attribute ibtrs_clt_state_attr = + __ATTR(state, 0444, ibtrs_clt_state_show, NULL); + +static ssize_t ibtrs_clt_reconnect_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 ibtrs_clt_reconnect_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct ibtrs_clt_sess *sess; + int ret; + + sess = container_of(kobj, struct ibtrs_clt_sess, kobj); + if (!sysfs_streq(buf, "1")) { + ibtrs_err(sess, "%s: unknown value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + ret = ibtrs_clt_reconnect_from_sysfs(sess); + if (unlikely(ret)) + return ret; + + return count; +} + +static struct kobj_attribute ibtrs_clt_reconnect_attr = + __ATTR(reconnect, 0644, ibtrs_clt_reconnect_show, + ibtrs_clt_reconnect_store); + +static ssize_t ibtrs_clt_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 ibtrs_clt_disconnect_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct ibtrs_clt_sess *sess; + int ret; + + sess = container_of(kobj, struct ibtrs_clt_sess, kobj); + if (!sysfs_streq(buf, "1")) { + ibtrs_err(sess, "%s: unknown value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + ret = ibtrs_clt_disconnect_from_sysfs(sess); + if (unlikely(ret)) + return ret; + + return count; +} + +static struct kobj_attribute ibtrs_clt_disconnect_attr = + __ATTR(disconnect, 0644, ibtrs_clt_disconnect_show, + ibtrs_clt_disconnect_store); + +static ssize_t ibtrs_clt_remove_path_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 ibtrs_clt_remove_path_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct ibtrs_clt_sess *sess; + int ret; + + sess = container_of(kobj, struct ibtrs_clt_sess, kobj); + if (!sysfs_streq(buf, "1")) { + ibtrs_err(sess, "%s: unknown value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + ret = ibtrs_clt_remove_path_from_sysfs(sess, &attr->attr); + if (unlikely(ret)) + return ret; + + return count; +} + +static struct kobj_attribute ibtrs_clt_remove_path_attr = + __ATTR(remove_path, 0644, ibtrs_clt_remove_path_show, + ibtrs_clt_remove_path_store); + +STAT_ATTR(struct ibtrs_clt_sess, cpu_migration, + ibtrs_clt_stats_migration_cnt_to_str, + ibtrs_clt_reset_cpu_migr_stats); + +STAT_ATTR(struct ibtrs_clt_sess, sg_entries, + ibtrs_clt_stats_sg_list_distr_to_str, + ibtrs_clt_reset_sg_list_distr_stats); + +STAT_ATTR(struct ibtrs_clt_sess, reconnects, + ibtrs_clt_stats_reconnects_to_str, + ibtrs_clt_reset_reconnects_stat); + +STAT_ATTR(struct ibtrs_clt_sess, rdma_lat, + ibtrs_clt_stats_rdma_lat_distr_to_str, + ibtrs_clt_reset_rdma_lat_distr_stats); + +STAT_ATTR(struct ibtrs_clt_sess, wc_completion, + ibtrs_clt_stats_wc_completion_to_str, + ibtrs_clt_reset_wc_comp_stats); + +STAT_ATTR(struct ibtrs_clt_sess, rdma, + ibtrs_clt_stats_rdma_to_str, + ibtrs_clt_reset_rdma_stats); + +STAT_ATTR(struct ibtrs_clt_sess, reset_all, + ibtrs_clt_reset_all_help, + ibtrs_clt_reset_all_stats); + +static struct attribute *ibtrs_clt_stats_attrs[] = { + &sg_entries_attr.attr, + &cpu_migration_attr.attr, + &reconnects_attr.attr, + &rdma_lat_attr.attr, + &wc_completion_attr.attr, + &rdma_attr.attr, + &reset_all_attr.attr, + NULL, +}; + +static struct attribute_group ibtrs_clt_stats_attr_group = { + .attrs = ibtrs_clt_stats_attrs, +}; + +static int ibtrs_clt_create_stats_files(struct kobject *kobj, + struct kobject *kobj_stats) +{ + int ret; + + ret = kobject_init_and_add(kobj_stats, &ktype, kobj, "stats"); + if (ret) { + pr_err("Failed to init and add stats kobject, err: %d\n", + ret); + return ret; + } + + ret = sysfs_create_group(kobj_stats, &ibtrs_clt_stats_attr_group); + if (ret) { + pr_err("failed to create stats sysfs group, err: %d\n", + ret); + goto err; + } + + return 0; + +err: + kobject_del(kobj_stats); + kobject_put(kobj_stats); + + return ret; +} + +static ssize_t ibtrs_clt_hca_port_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct ibtrs_clt_sess *sess; + + sess = container_of(kobj, typeof(*sess), kobj); + + return scnprintf(page, PAGE_SIZE, "%u\n", sess->hca_port); +} + +static struct kobj_attribute ibtrs_clt_hca_port_attr = + __ATTR(hca_port, 0444, ibtrs_clt_hca_port_show, NULL); + +static ssize_t ibtrs_clt_hca_name_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct ibtrs_clt_sess *sess; + + sess = container_of(kobj, struct ibtrs_clt_sess, kobj); + + return scnprintf(page, PAGE_SIZE, "%s\n", sess->hca_name); +} + +static struct kobj_attribute ibtrs_clt_hca_name_attr = + __ATTR(hca_name, 0444, ibtrs_clt_hca_name_show, NULL); + +static ssize_t ibtrs_clt_src_addr_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct ibtrs_clt_sess *sess; + int cnt; + + sess = container_of(kobj, struct ibtrs_clt_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 ibtrs_clt_src_addr_attr = + __ATTR(src_addr, 0444, ibtrs_clt_src_addr_show, NULL); + +static ssize_t ibtrs_clt_dst_addr_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct ibtrs_clt_sess *sess; + int cnt; + + sess = container_of(kobj, struct ibtrs_clt_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 ibtrs_clt_dst_addr_attr = + __ATTR(dst_addr, 0444, ibtrs_clt_dst_addr_show, NULL); + +static struct attribute *ibtrs_clt_sess_attrs[] = { + &ibtrs_clt_hca_name_attr.attr, + &ibtrs_clt_hca_port_attr.attr, + &ibtrs_clt_src_addr_attr.attr, + &ibtrs_clt_dst_addr_attr.attr, + &ibtrs_clt_state_attr.attr, + &ibtrs_clt_reconnect_attr.attr, + &ibtrs_clt_disconnect_attr.attr, + &ibtrs_clt_remove_path_attr.attr, + NULL, +}; + +static struct attribute_group ibtrs_clt_sess_attr_group = { + .attrs = ibtrs_clt_sess_attrs, +}; + +int ibtrs_clt_create_sess_files(struct ibtrs_clt_sess *sess) +{ + struct ibtrs_clt *clt = sess->clt; + char str[NAME_MAX]; + int err, cnt; + + cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, + str, sizeof(str)); + cnt += scnprintf(str + cnt, sizeof(str) - cnt, "@"); + sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, + str + cnt, sizeof(str) - cnt); + + err = kobject_init_and_add(&sess->kobj, &ktype, &clt->kobj_paths, + "%s", str); + if (unlikely(err)) { + pr_err("kobject_init_and_add: %d\n", err); + return err; + } + err = sysfs_create_group(&sess->kobj, &ibtrs_clt_sess_attr_group); + if (unlikely(err)) { + pr_err("sysfs_create_group(): %d\n", err); + goto put_kobj; + } + err = ibtrs_clt_create_stats_files(&sess->kobj, &sess->kobj_stats); + if (unlikely(err)) + goto put_kobj; + + return 0; + +put_kobj: + kobject_del(&sess->kobj); + kobject_put(&sess->kobj); + + return err; +} + +void ibtrs_clt_destroy_sess_files(struct ibtrs_clt_sess *sess, + const struct attribute *sysfs_self) +{ + if (sess->kobj.state_in_sysfs) { + kobject_del(&sess->kobj_stats); + kobject_put(&sess->kobj_stats); + if (sysfs_self) + /* To avoid deadlock firstly commit suicide */ + sysfs_remove_file_self(&sess->kobj, sysfs_self); + kobject_del(&sess->kobj); + kobject_put(&sess->kobj); + } +} + +static struct attribute *ibtrs_clt_attrs[] = { + &dev_attr_max_reconnect_attempts.attr, + &dev_attr_mpath_policy.attr, + &dev_attr_add_path.attr, + NULL, +}; + +static struct attribute_group ibtrs_clt_attr_group = { + .attrs = ibtrs_clt_attrs, +}; + +int ibtrs_clt_create_sysfs_root_folders(struct ibtrs_clt *clt) +{ + return kobject_init_and_add(&clt->kobj_paths, &ktype, + &clt->dev.kobj, "paths"); +} + +int ibtrs_clt_create_sysfs_root_files(struct ibtrs_clt *clt) +{ + return sysfs_create_group(&clt->dev.kobj, &ibtrs_clt_attr_group); +} + +void ibtrs_clt_destroy_sysfs_root_folders(struct ibtrs_clt *clt) +{ + if (clt->kobj_paths.state_in_sysfs) { + kobject_del(&clt->kobj_paths); + kobject_put(&clt->kobj_paths); + } +} + +void ibtrs_clt_destroy_sysfs_root_files(struct ibtrs_clt *clt) +{ + sysfs_remove_group(&clt->dev.kobj, &ibtrs_clt_attr_group); +} -- 2.17.1