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bh=HMX8oZWgChS/yXnesgab3T5EmxicN6WhvU2EKC1ejME=; b=dwADcMCD7c1bbLSdNri94C9UBkm4bvwbgASDZtdtCJW8wDwKbz8sTAcKrFj+TiyqXU Wgxvvu1sQEudfDIKjMZHERYNdz8Rc+Kteqttp7o727YJt9B6EjRVJ+1OmoPJQ1cu8kHH EnRfKDRHdHTYwf31UPaM7T/b8UdbiJVQeNugIHwJMPmGqIDLF8wht11Dp4PoQPAhBbFh rgfFvIZTyCKBDAdYlsqsAgf/KJjFhj3OuoRFgC4mgAvsSTdP6pfqjcr3w1F31Q4tXvBb cd6tbqdOw+sQSDh7pI0nkXsSjyfg4kr7VwpZGWfcfyD+fGkh3GDHrWa28iMPJbkFHH8/ WEZg== X-Gm-Message-State: APjAAAWXUkJj4HPzC8hyk2bQOMMtyg2DtomGnYJBdr6iR/BMUZC0TI9w 6kMdgXp4jPnXPOn9lefJUdThF1klY8I= X-Google-Smtp-Source: APXvYqyBb+sGF+wN0YLqMUOL/a03yFcvBIxdTRp0eoYBNhDgL9XoJ2/cD9kb77QLHZ1sYw3aZxz1fw== X-Received: by 2002:adf:cd0a:: with SMTP id w10mr15624197wrm.107.1576857082758; Fri, 20 Dec 2019 07:51:22 -0800 (PST) Received: from jwang-Latitude-5491.fritz.box ([2001:16b8:4972:cc00:b9e0:6ef7:286d:4897]) by smtp.gmail.com with ESMTPSA id u14sm10372139wrm.51.2019.12.20.07.51.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Dec 2019 07:51:22 -0800 (PST) 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, danil.kipnis@cloud.ionos.com, jinpu.wang@cloud.ionos.com, rpenyaev@suse.de Subject: [PATCH v5 08/25] rtrs: client: sysfs interface functions Date: Fri, 20 Dec 2019 16:50:52 +0100 Message-Id: <20191220155109.8959-9-jinpuwang@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191220155109.8959-1-jinpuwang@gmail.com> References: <20191220155109.8959-1-jinpuwang@gmail.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Jack Wang This is the sysfs interface to rtrs sessions on client side: /sys/devices/virtual/rtrs-client// *** rtrs session created by rtrs_clt_open() API call | |- max_reconnect_attempts | *** number of reconnect attempts for session | |- add_path | *** adds another connection path into rtrs 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 --- drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c | 519 +++++++++++++++++++ 1 file changed, 519 insertions(+) create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c new file mode 100644 index 000000000000..bc2cb7638e3f --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c @@ -0,0 +1,519 @@ +// 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 + * Jinpu Wang + * Danil Kipnis + */ + +/* Copyright (c) 2019 1&1 IONOS SE. All rights reserved. + * Authors: Jack Wang + * Danil Kipnis + * Guoqing Jiang + * Lutz Pogrell + */ +#undef pr_fmt +#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt + +#include "rtrs-pri.h" +#include "rtrs-clt.h" +#include "rtrs-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 rtrs_clt *clt; + + clt = container_of(dev, struct rtrs_clt, dev); + + return sprintf(page, "%d\n", rtrs_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 rtrs_clt *clt; + int value; + int ret; + + clt = container_of(dev, struct rtrs_clt, dev); + + ret = kstrtoint(buf, 10, &value); + if (unlikely(ret)) { + rtrs_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)) { + rtrs_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; + } + rtrs_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 rtrs_clt *clt; + + clt = container_of(dev, struct rtrs_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 rtrs_clt *clt; + int value; + int ret; + + clt = container_of(dev, struct rtrs_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 rtrs_addr addr = { + .src = &srcaddr, + .dst = &dstaddr + }; + struct rtrs_clt *clt; + const char *nl; + size_t len; + int err; + + clt = container_of(dev, struct rtrs_clt, dev); + + nl = strchr(buf, '\n'); + if (nl) + len = nl - buf; + else + len = count; + err = rtrs_addr_to_sockaddr(buf, len, clt->port, &addr); + if (unlikely(err)) + return -EINVAL; + + err = rtrs_clt_create_path_from_sysfs(clt, &addr); + if (unlikely(err)) + return err; + + return count; +} + +static DEVICE_ATTR_RW(add_path); + +static ssize_t rtrs_clt_state_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + struct rtrs_clt_sess *sess; + + sess = container_of(kobj, struct rtrs_clt_sess, kobj); + if (sess->state == RTRS_CLT_CONNECTED) + return sprintf(page, "connected\n"); + + return sprintf(page, "disconnected\n"); +} + +static struct kobj_attribute rtrs_clt_state_attr = + __ATTR(state, 0444, rtrs_clt_state_show, NULL); + +static ssize_t rtrs_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 rtrs_clt_reconnect_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct rtrs_clt_sess *sess; + int ret; + + sess = container_of(kobj, struct rtrs_clt_sess, kobj); + if (!sysfs_streq(buf, "1")) { + rtrs_err(sess->clt, "%s: unknown value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + ret = rtrs_clt_reconnect_from_sysfs(sess); + if (unlikely(ret)) + return ret; + + return count; +} + +static struct kobj_attribute rtrs_clt_reconnect_attr = + __ATTR(reconnect, 0644, rtrs_clt_reconnect_show, + rtrs_clt_reconnect_store); + +static ssize_t rtrs_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 rtrs_clt_disconnect_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct rtrs_clt_sess *sess; + int ret; + + sess = container_of(kobj, struct rtrs_clt_sess, kobj); + if (!sysfs_streq(buf, "1")) { + rtrs_err(sess->clt, "%s: unknown value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + ret = rtrs_clt_disconnect_from_sysfs(sess); + if (unlikely(ret)) + return ret; + + return count; +} + +static struct kobj_attribute rtrs_clt_disconnect_attr = + __ATTR(disconnect, 0644, rtrs_clt_disconnect_show, + rtrs_clt_disconnect_store); + +static ssize_t rtrs_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 rtrs_clt_remove_path_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct rtrs_clt_sess *sess; + int ret; + + sess = container_of(kobj, struct rtrs_clt_sess, kobj); + if (!sysfs_streq(buf, "1")) { + rtrs_err(sess->clt, "%s: unknown value: '%s'\n", + attr->attr.name, buf); + return -EINVAL; + } + ret = rtrs_clt_remove_path_from_sysfs(sess, &attr->attr); + if (unlikely(ret)) + return ret; + + return count; +} + +static struct kobj_attribute rtrs_clt_remove_path_attr = + __ATTR(remove_path, 0644, rtrs_clt_remove_path_show, + rtrs_clt_remove_path_store); + +STAT_ATTR(struct rtrs_clt_sess, cpu_migration, + rtrs_clt_stats_migration_cnt_to_str, + rtrs_clt_reset_cpu_migr_stats); + +STAT_ATTR(struct rtrs_clt_sess, sg_entries, + rtrs_clt_stats_sg_list_distr_to_str, + rtrs_clt_reset_sg_list_distr_stats); + +STAT_ATTR(struct rtrs_clt_sess, reconnects, + rtrs_clt_stats_reconnects_to_str, + rtrs_clt_reset_reconnects_stat); + +STAT_ATTR(struct rtrs_clt_sess, rdma_lat, + rtrs_clt_stats_rdma_lat_distr_to_str, + rtrs_clt_reset_rdma_lat_distr_stats); + +STAT_ATTR(struct rtrs_clt_sess, wc_completion, + rtrs_clt_stats_wc_completion_to_str, + rtrs_clt_reset_wc_comp_stats); + +STAT_ATTR(struct rtrs_clt_sess, rdma, + rtrs_clt_stats_rdma_to_str, + rtrs_clt_reset_rdma_stats); + +STAT_ATTR(struct rtrs_clt_sess, reset_all, + rtrs_clt_reset_all_help, + rtrs_clt_reset_all_stats); + +static struct attribute *rtrs_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 rtrs_clt_stats_attr_group = { + .attrs = rtrs_clt_stats_attrs, +}; + +static int rtrs_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, &rtrs_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 rtrs_clt_hca_port_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_clt_sess *sess; + + sess = container_of(kobj, typeof(*sess), kobj); + + return scnprintf(page, PAGE_SIZE, "%u\n", sess->hca_port); +} + +static struct kobj_attribute rtrs_clt_hca_port_attr = + __ATTR(hca_port, 0444, rtrs_clt_hca_port_show, NULL); + +static ssize_t rtrs_clt_hca_name_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_clt_sess *sess; + + sess = container_of(kobj, struct rtrs_clt_sess, kobj); + + return scnprintf(page, PAGE_SIZE, "%s\n", sess->hca_name); +} + +static struct kobj_attribute rtrs_clt_hca_name_attr = + __ATTR(hca_name, 0444, rtrs_clt_hca_name_show, NULL); + +static ssize_t rtrs_clt_src_addr_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_clt_sess *sess; + int cnt; + + sess = container_of(kobj, struct rtrs_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 rtrs_clt_src_addr_attr = + __ATTR(src_addr, 0444, rtrs_clt_src_addr_show, NULL); + +static ssize_t rtrs_clt_dst_addr_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *page) +{ + struct rtrs_clt_sess *sess; + int cnt; + + sess = container_of(kobj, struct rtrs_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 rtrs_clt_dst_addr_attr = + __ATTR(dst_addr, 0444, rtrs_clt_dst_addr_show, NULL); + +static struct attribute *rtrs_clt_sess_attrs[] = { + &rtrs_clt_hca_name_attr.attr, + &rtrs_clt_hca_port_attr.attr, + &rtrs_clt_src_addr_attr.attr, + &rtrs_clt_dst_addr_attr.attr, + &rtrs_clt_state_attr.attr, + &rtrs_clt_reconnect_attr.attr, + &rtrs_clt_disconnect_attr.attr, + &rtrs_clt_remove_path_attr.attr, + NULL, +}; + +static struct attribute_group rtrs_clt_sess_attr_group = { + .attrs = rtrs_clt_sess_attrs, +}; + +int rtrs_clt_create_sess_files(struct rtrs_clt_sess *sess) +{ + struct rtrs_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, &rtrs_clt_sess_attr_group); + if (unlikely(err)) { + pr_err("sysfs_create_group(): %d\n", err); + goto put_kobj; + } + err = rtrs_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 rtrs_clt_destroy_sess_files(struct rtrs_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 *rtrs_clt_attrs[] = { + &dev_attr_max_reconnect_attempts.attr, + &dev_attr_mpath_policy.attr, + &dev_attr_add_path.attr, + NULL, +}; + +static struct attribute_group rtrs_clt_attr_group = { + .attrs = rtrs_clt_attrs, +}; + +int rtrs_clt_create_sysfs_root_folders(struct rtrs_clt *clt) +{ + return kobject_init_and_add(&clt->kobj_paths, &ktype, + &clt->dev.kobj, "paths"); +} + +int rtrs_clt_create_sysfs_root_files(struct rtrs_clt *clt) +{ + return sysfs_create_group(&clt->dev.kobj, &rtrs_clt_attr_group); +} + +void rtrs_clt_destroy_sysfs_root_folders(struct rtrs_clt *clt) +{ + if (clt->kobj_paths.state_in_sysfs) { + kobject_del(&clt->kobj_paths); + kobject_put(&clt->kobj_paths); + } +} + +void rtrs_clt_destroy_sysfs_root_files(struct rtrs_clt *clt) +{ + sysfs_remove_group(&clt->dev.kobj, &rtrs_clt_attr_group); +} -- 2.17.1