1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
6 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
7 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
10 #define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
16 static void rtrs_srv_release(struct kobject *kobj)
18 struct rtrs_srv_sess *sess;
20 sess = container_of(kobj, struct rtrs_srv_sess, kobj);
24 static struct kobj_type ktype = {
25 .sysfs_ops = &kobj_sysfs_ops,
26 .release = rtrs_srv_release,
29 static ssize_t rtrs_srv_disconnect_show(struct kobject *kobj,
30 struct kobj_attribute *attr, char *buf)
32 return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
35 static ssize_t rtrs_srv_disconnect_store(struct kobject *kobj,
36 struct kobj_attribute *attr,
37 const char *buf, size_t count)
39 struct rtrs_srv_sess *sess;
41 char str[MAXHOSTNAMELEN];
43 sess = container_of(kobj, struct rtrs_srv_sess, kobj);
45 if (!sysfs_streq(buf, "1")) {
46 rtrs_err(s, "%s: invalid value: '%s'\n",
47 attr->attr.name, buf);
51 sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str));
53 rtrs_info(s, "disconnect for path %s requested\n", str);
54 /* first remove sysfs itself to avoid deadlock */
55 sysfs_remove_file_self(&sess->kobj, &attr->attr);
61 static struct kobj_attribute rtrs_srv_disconnect_attr =
62 __ATTR(disconnect, 0644,
63 rtrs_srv_disconnect_show, rtrs_srv_disconnect_store);
65 static ssize_t rtrs_srv_hca_port_show(struct kobject *kobj,
66 struct kobj_attribute *attr,
69 struct rtrs_srv_sess *sess;
70 struct rtrs_con *usr_con;
72 sess = container_of(kobj, typeof(*sess), kobj);
73 usr_con = sess->s.con[0];
75 return sysfs_emit(page, "%u\n", usr_con->cm_id->port_num);
78 static struct kobj_attribute rtrs_srv_hca_port_attr =
79 __ATTR(hca_port, 0444, rtrs_srv_hca_port_show, NULL);
81 static ssize_t rtrs_srv_hca_name_show(struct kobject *kobj,
82 struct kobj_attribute *attr,
85 struct rtrs_srv_sess *sess;
87 sess = container_of(kobj, struct rtrs_srv_sess, kobj);
89 return sysfs_emit(page, "%s\n", sess->s.dev->ib_dev->name);
92 static struct kobj_attribute rtrs_srv_hca_name_attr =
93 __ATTR(hca_name, 0444, rtrs_srv_hca_name_show, NULL);
95 static ssize_t rtrs_srv_src_addr_show(struct kobject *kobj,
96 struct kobj_attribute *attr,
99 struct rtrs_srv_sess *sess;
102 sess = container_of(kobj, struct rtrs_srv_sess, kobj);
103 cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
105 return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n");
108 static struct kobj_attribute rtrs_srv_src_addr_attr =
109 __ATTR(src_addr, 0444, rtrs_srv_src_addr_show, NULL);
111 static ssize_t rtrs_srv_dst_addr_show(struct kobject *kobj,
112 struct kobj_attribute *attr,
115 struct rtrs_srv_sess *sess;
118 sess = container_of(kobj, struct rtrs_srv_sess, kobj);
119 len = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, page,
121 len += sysfs_emit_at(page, len, "\n");
125 static struct kobj_attribute rtrs_srv_dst_addr_attr =
126 __ATTR(dst_addr, 0444, rtrs_srv_dst_addr_show, NULL);
128 static struct attribute *rtrs_srv_sess_attrs[] = {
129 &rtrs_srv_hca_name_attr.attr,
130 &rtrs_srv_hca_port_attr.attr,
131 &rtrs_srv_src_addr_attr.attr,
132 &rtrs_srv_dst_addr_attr.attr,
133 &rtrs_srv_disconnect_attr.attr,
137 static const struct attribute_group rtrs_srv_sess_attr_group = {
138 .attrs = rtrs_srv_sess_attrs,
141 STAT_ATTR(struct rtrs_srv_stats, rdma,
142 rtrs_srv_stats_rdma_to_str,
143 rtrs_srv_reset_rdma_stats);
145 static struct attribute *rtrs_srv_stats_attrs[] = {
150 static const struct attribute_group rtrs_srv_stats_attr_group = {
151 .attrs = rtrs_srv_stats_attrs,
154 static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
156 struct rtrs_srv *srv = sess->srv;
159 mutex_lock(&srv->paths_mutex);
160 if (srv->dev_ref++) {
162 * Device needs to be registered only on the first session
166 srv->dev.class = rtrs_dev_class;
167 err = dev_set_name(&srv->dev, "%s", sess->s.sessname);
172 * Suppress user space notification until
173 * sysfs files are created
175 dev_set_uevent_suppress(&srv->dev, true);
176 err = device_add(&srv->dev);
178 pr_err("device_add(): %d\n", err);
179 put_device(&srv->dev);
182 srv->kobj_paths = kobject_create_and_add("paths", &srv->dev.kobj);
183 if (!srv->kobj_paths) {
185 pr_err("kobject_create_and_add(): %d\n", err);
186 device_del(&srv->dev);
187 put_device(&srv->dev);
190 dev_set_uevent_suppress(&srv->dev, false);
191 kobject_uevent(&srv->dev.kobj, KOBJ_ADD);
193 mutex_unlock(&srv->paths_mutex);
199 rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
201 struct rtrs_srv *srv = sess->srv;
203 mutex_lock(&srv->paths_mutex);
204 if (!--srv->dev_ref) {
205 kobject_del(srv->kobj_paths);
206 kobject_put(srv->kobj_paths);
207 mutex_unlock(&srv->paths_mutex);
208 device_del(&srv->dev);
209 put_device(&srv->dev);
211 mutex_unlock(&srv->paths_mutex);
215 static void rtrs_srv_sess_stats_release(struct kobject *kobj)
217 struct rtrs_srv_stats *stats;
219 stats = container_of(kobj, struct rtrs_srv_stats, kobj_stats);
224 static struct kobj_type ktype_stats = {
225 .sysfs_ops = &kobj_sysfs_ops,
226 .release = rtrs_srv_sess_stats_release,
229 static int rtrs_srv_create_stats_files(struct rtrs_srv_sess *sess)
232 struct rtrs_sess *s = &sess->s;
234 err = kobject_init_and_add(&sess->stats->kobj_stats, &ktype_stats,
235 &sess->kobj, "stats");
237 rtrs_err(s, "kobject_init_and_add(): %d\n", err);
238 kobject_put(&sess->stats->kobj_stats);
241 err = sysfs_create_group(&sess->stats->kobj_stats,
242 &rtrs_srv_stats_attr_group);
244 rtrs_err(s, "sysfs_create_group(): %d\n", err);
251 kobject_del(&sess->stats->kobj_stats);
252 kobject_put(&sess->stats->kobj_stats);
257 int rtrs_srv_create_sess_files(struct rtrs_srv_sess *sess)
259 struct rtrs_srv *srv = sess->srv;
260 struct rtrs_sess *s = &sess->s;
263 struct rtrs_addr path = {
264 .src = &sess->s.dst_addr,
265 .dst = &sess->s.src_addr,
268 rtrs_addr_to_str(&path, str, sizeof(str));
269 err = rtrs_srv_create_once_sysfs_root_folders(sess);
273 err = kobject_init_and_add(&sess->kobj, &ktype, srv->kobj_paths,
276 rtrs_err(s, "kobject_init_and_add(): %d\n", err);
279 err = sysfs_create_group(&sess->kobj, &rtrs_srv_sess_attr_group);
281 rtrs_err(s, "sysfs_create_group(): %d\n", err);
284 err = rtrs_srv_create_stats_files(sess);
291 sysfs_remove_group(&sess->kobj, &rtrs_srv_sess_attr_group);
293 kobject_del(&sess->kobj);
295 kobject_put(&sess->kobj);
296 rtrs_srv_destroy_once_sysfs_root_folders(sess);
301 void rtrs_srv_destroy_sess_files(struct rtrs_srv_sess *sess)
303 if (sess->kobj.state_in_sysfs) {
304 kobject_del(&sess->stats->kobj_stats);
305 kobject_put(&sess->stats->kobj_stats);
306 sysfs_remove_group(&sess->kobj, &rtrs_srv_sess_attr_group);
307 kobject_put(&sess->kobj);
309 rtrs_srv_destroy_once_sysfs_root_folders(sess);