forked from luck/tmp_suning_uos_patched
RDMA/rtrs: server: sysfs interface functions
This is the sysfs interface to rtrs sessions on server side:
/sys/class/rtrs-server/<SESS-NAME>/
*** rtrs session accepted from a client peer
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|- paths/<SRC@DST>/
*** established paths from a client in a session
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|- disconnect
| *** disconnect path
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|- hca_name
| *** HCA name
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|- hca_port
| *** HCA port
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|- stats/
*** current path statistics
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|- rdma
Link: https://lore.kernel.org/r/20200511135131.27580-13-danil.kipnis@cloud.ionos.com
Signed-off-by: Danil Kipnis <danil.kipnis@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Jack Wang
Jason Gunthorpe
parent
c4f07c60bb
commit
91b11610af
320
drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
Normal file
320
drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
Normal file
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@ -0,0 +1,320 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* RDMA Transport Layer
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*
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* Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
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* Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
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* Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
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*/
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#undef pr_fmt
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#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
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#include "rtrs-pri.h"
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#include "rtrs-srv.h"
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#include "rtrs-log.h"
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static void rtrs_srv_release(struct kobject *kobj)
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{
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struct rtrs_srv_sess *sess;
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sess = container_of(kobj, struct rtrs_srv_sess, kobj);
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kfree(sess);
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}
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static struct kobj_type ktype = {
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.sysfs_ops = &kobj_sysfs_ops,
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.release = rtrs_srv_release,
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};
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static ssize_t rtrs_srv_disconnect_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *page)
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{
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return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
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attr->attr.name);
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}
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static ssize_t rtrs_srv_disconnect_store(struct kobject *kobj,
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struct kobj_attribute *attr,
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const char *buf, size_t count)
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{
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struct rtrs_srv_sess *sess;
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struct rtrs_sess *s;
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char str[MAXHOSTNAMELEN];
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sess = container_of(kobj, struct rtrs_srv_sess, kobj);
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s = &sess->s;
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if (!sysfs_streq(buf, "1")) {
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rtrs_err(s, "%s: invalid value: '%s'\n",
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attr->attr.name, buf);
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return -EINVAL;
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}
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sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str));
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rtrs_info(s, "disconnect for path %s requested\n", str);
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close_sess(sess);
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return count;
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}
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static struct kobj_attribute rtrs_srv_disconnect_attr =
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__ATTR(disconnect, 0644,
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rtrs_srv_disconnect_show, rtrs_srv_disconnect_store);
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static ssize_t rtrs_srv_hca_port_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *page)
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{
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struct rtrs_srv_sess *sess;
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struct rtrs_con *usr_con;
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sess = container_of(kobj, typeof(*sess), kobj);
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usr_con = sess->s.con[0];
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return scnprintf(page, PAGE_SIZE, "%u\n",
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usr_con->cm_id->port_num);
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}
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static struct kobj_attribute rtrs_srv_hca_port_attr =
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__ATTR(hca_port, 0444, rtrs_srv_hca_port_show, NULL);
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static ssize_t rtrs_srv_hca_name_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *page)
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{
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struct rtrs_srv_sess *sess;
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sess = container_of(kobj, struct rtrs_srv_sess, kobj);
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return scnprintf(page, PAGE_SIZE, "%s\n",
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sess->s.dev->ib_dev->name);
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}
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static struct kobj_attribute rtrs_srv_hca_name_attr =
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__ATTR(hca_name, 0444, rtrs_srv_hca_name_show, NULL);
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static ssize_t rtrs_srv_src_addr_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *page)
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{
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struct rtrs_srv_sess *sess;
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int cnt;
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sess = container_of(kobj, struct rtrs_srv_sess, kobj);
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cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
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page, PAGE_SIZE);
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return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n");
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}
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static struct kobj_attribute rtrs_srv_src_addr_attr =
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__ATTR(src_addr, 0444, rtrs_srv_src_addr_show, NULL);
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static ssize_t rtrs_srv_dst_addr_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *page)
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{
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struct rtrs_srv_sess *sess;
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int cnt;
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sess = container_of(kobj, struct rtrs_srv_sess, kobj);
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cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr,
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page, PAGE_SIZE);
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return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n");
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}
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static struct kobj_attribute rtrs_srv_dst_addr_attr =
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__ATTR(dst_addr, 0444, rtrs_srv_dst_addr_show, NULL);
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static struct attribute *rtrs_srv_sess_attrs[] = {
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&rtrs_srv_hca_name_attr.attr,
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&rtrs_srv_hca_port_attr.attr,
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&rtrs_srv_src_addr_attr.attr,
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&rtrs_srv_dst_addr_attr.attr,
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&rtrs_srv_disconnect_attr.attr,
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NULL,
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};
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static struct attribute_group rtrs_srv_sess_attr_group = {
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.attrs = rtrs_srv_sess_attrs,
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};
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STAT_ATTR(struct rtrs_srv_stats, rdma,
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rtrs_srv_stats_rdma_to_str,
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rtrs_srv_reset_rdma_stats);
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static struct attribute *rtrs_srv_stats_attrs[] = {
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&rdma_attr.attr,
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NULL,
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};
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static struct attribute_group rtrs_srv_stats_attr_group = {
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.attrs = rtrs_srv_stats_attrs,
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};
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static void rtrs_srv_dev_release(struct device *dev)
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{
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struct rtrs_srv *srv = container_of(dev, struct rtrs_srv, dev);
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kfree(srv);
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}
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static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
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{
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struct rtrs_srv *srv = sess->srv;
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int err = 0;
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mutex_lock(&srv->paths_mutex);
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if (srv->dev_ref++) {
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/*
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* Device needs to be registered only on the first session
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*/
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goto unlock;
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}
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srv->dev.class = rtrs_dev_class;
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srv->dev.release = rtrs_srv_dev_release;
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err = dev_set_name(&srv->dev, "%s", sess->s.sessname);
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if (err)
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goto unlock;
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/*
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* Suppress user space notification until
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* sysfs files are created
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*/
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dev_set_uevent_suppress(&srv->dev, true);
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err = device_register(&srv->dev);
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if (err) {
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pr_err("device_register(): %d\n", err);
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goto put;
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}
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srv->kobj_paths = kobject_create_and_add("paths", &srv->dev.kobj);
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if (!srv->kobj_paths) {
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pr_err("kobject_create_and_add(): %d\n", err);
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device_unregister(&srv->dev);
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goto unlock;
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}
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dev_set_uevent_suppress(&srv->dev, false);
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kobject_uevent(&srv->dev.kobj, KOBJ_ADD);
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goto unlock;
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put:
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put_device(&srv->dev);
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unlock:
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mutex_unlock(&srv->paths_mutex);
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return err;
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}
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static void
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rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
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{
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struct rtrs_srv *srv = sess->srv;
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mutex_lock(&srv->paths_mutex);
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if (!--srv->dev_ref) {
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kobject_del(srv->kobj_paths);
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kobject_put(srv->kobj_paths);
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mutex_unlock(&srv->paths_mutex);
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device_unregister(&srv->dev);
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} else {
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mutex_unlock(&srv->paths_mutex);
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}
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}
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static void rtrs_srv_sess_stats_release(struct kobject *kobj)
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{
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struct rtrs_srv_stats *stats;
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stats = container_of(kobj, struct rtrs_srv_stats, kobj_stats);
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kfree(stats);
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}
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static struct kobj_type ktype_stats = {
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.sysfs_ops = &kobj_sysfs_ops,
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.release = rtrs_srv_sess_stats_release,
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};
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static int rtrs_srv_create_stats_files(struct rtrs_srv_sess *sess)
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{
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int err;
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struct rtrs_sess *s = &sess->s;
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err = kobject_init_and_add(&sess->stats->kobj_stats, &ktype_stats,
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&sess->kobj, "stats");
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if (err) {
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rtrs_err(s, "kobject_init_and_add(): %d\n", err);
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return err;
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}
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err = sysfs_create_group(&sess->stats->kobj_stats,
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&rtrs_srv_stats_attr_group);
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if (err) {
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rtrs_err(s, "sysfs_create_group(): %d\n", err);
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goto err;
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}
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return 0;
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err:
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kobject_del(&sess->stats->kobj_stats);
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kobject_put(&sess->stats->kobj_stats);
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return err;
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}
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int rtrs_srv_create_sess_files(struct rtrs_srv_sess *sess)
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{
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struct rtrs_srv *srv = sess->srv;
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struct rtrs_sess *s = &sess->s;
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char str[NAME_MAX];
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int err, cnt;
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cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
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str, sizeof(str));
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cnt += scnprintf(str + cnt, sizeof(str) - cnt, "@");
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sockaddr_to_str((struct sockaddr *)&sess->s.src_addr,
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str + cnt, sizeof(str) - cnt);
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err = rtrs_srv_create_once_sysfs_root_folders(sess);
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if (err)
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return err;
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err = kobject_init_and_add(&sess->kobj, &ktype, srv->kobj_paths,
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"%s", str);
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if (err) {
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rtrs_err(s, "kobject_init_and_add(): %d\n", err);
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goto destroy_root;
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}
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err = sysfs_create_group(&sess->kobj, &rtrs_srv_sess_attr_group);
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if (err) {
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rtrs_err(s, "sysfs_create_group(): %d\n", err);
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goto put_kobj;
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}
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err = rtrs_srv_create_stats_files(sess);
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if (err)
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goto remove_group;
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return 0;
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remove_group:
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sysfs_remove_group(&sess->kobj, &rtrs_srv_sess_attr_group);
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put_kobj:
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kobject_del(&sess->kobj);
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kobject_put(&sess->kobj);
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destroy_root:
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rtrs_srv_destroy_once_sysfs_root_folders(sess);
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return err;
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}
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void rtrs_srv_destroy_sess_files(struct rtrs_srv_sess *sess)
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{
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if (sess->kobj.state_in_sysfs) {
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kobject_del(&sess->stats->kobj_stats);
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kobject_put(&sess->stats->kobj_stats);
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kobject_del(&sess->kobj);
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kobject_put(&sess->kobj);
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rtrs_srv_destroy_once_sysfs_root_folders(sess);
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}
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}
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