summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
blob: 3d7877534bcc9d9cc33ab6f6605598ee3435d07b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
// 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 void rtrs_srv_release(struct kobject *kobj)
{
	struct rtrs_srv_sess *sess;

	sess = container_of(kobj, struct rtrs_srv_sess, kobj);
	kfree(sess);
}

static struct kobj_type ktype = {
	.sysfs_ops	= &kobj_sysfs_ops,
	.release	= rtrs_srv_release,
};

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_stats, 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;
	}
	srv->kobj_paths = kobject_create_and_add("paths", &srv->dev.kobj);
	if (!srv->kobj_paths) {
		err = -ENOMEM;
		pr_err("kobject_create_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 void rtrs_srv_sess_stats_release(struct kobject *kobj)
{
	struct rtrs_srv_stats *stats;

	stats = container_of(kobj, struct rtrs_srv_stats, kobj_stats);

	kfree(stats);
}

static struct kobj_type ktype_stats = {
	.sysfs_ops = &kobj_sysfs_ops,
	.release = rtrs_srv_sess_stats_release,
};

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->stats->kobj_stats, &ktype_stats,
				   &sess->kobj, "stats");
	if (err) {
		rtrs_err(s, "kobject_init_and_add(): %d\n", err);
		return err;
	}
	err = sysfs_create_group(&sess->stats->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->stats->kobj_stats);
	kobject_put(&sess->stats->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->stats->kobj_stats);
		kobject_put(&sess->stats->kobj_stats);
		kobject_del(&sess->kobj);
		kobject_put(&sess->kobj);

		rtrs_srv_destroy_once_sysfs_root_folders(sess);
	}
}