[mirror_ubuntu-jammy-kernel.git] / drivers / infiniband / ulp / rtrs / rtrs-clt-sysfs.c

// 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-clt.h"
#include "rtrs-log.h"

#define MIN_MAX_RECONN_ATT -1
#define MAX_MAX_RECONN_ATT 9999

static void rtrs_clt_sess_release(struct kobject *kobj)
{
	struct rtrs_clt_sess *sess;

	sess = container_of(kobj, struct rtrs_clt_sess, kobj);

	free_sess(sess);
}

static struct kobj_type ktype_sess = {
	.sysfs_ops = &kobj_sysfs_ops,
	.release = rtrs_clt_sess_release
};

static void rtrs_clt_sess_stats_release(struct kobject *kobj)
{
	struct rtrs_clt_stats *stats;

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

	free_percpu(stats->pcpu_stats);

	kfree(stats);
}

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

static ssize_t max_reconnect_attempts_show(struct device *dev,
					   struct device_attribute *attr,
					   char *page)
{
	struct rtrs_clt *clt = container_of(dev, struct rtrs_clt, dev);

	return sysfs_emit(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)
{
	int value;
	int ret;
	struct rtrs_clt *clt  = container_of(dev, struct rtrs_clt, dev);

	ret = kstrtoint(buf, 10, &value);
	if (ret) {
		rtrs_err(clt, "%s: failed to convert string '%s' to int\n",
			  attr->attr.name, buf);
		return ret;
	}
	if (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 sysfs_emit(page, "round-robin (RR: %d)\n",
				  clt->mp_policy);
	case MP_POLICY_MIN_INFLIGHT:
		return sysfs_emit(page, "min-inflight (MI: %d)\n",
				  clt->mp_policy);
	default:
		return sysfs_emit(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 sysfs_emit(
		page,
		"Usage: echo [<source addr>@]<destination addr> > %s\n\n*addr ::= [ ip:<ipv4|ipv6> | gid:<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 (err)
		return -EINVAL;

	err = rtrs_clt_create_path_from_sysfs(clt, &addr);
	if (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 sysfs_emit(page, "connected\n");

	return sysfs_emit(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 *buf)
{
	return sysfs_emit(buf, "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 (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 *buf)
{
	return sysfs_emit(buf, "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 (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 *buf)
{
	return sysfs_emit(buf, "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 (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_stats, cpu_migration,
	  rtrs_clt_stats_migration_cnt_to_str,
	  rtrs_clt_reset_cpu_migr_stats);

STAT_ATTR(struct rtrs_clt_stats, reconnects,
	  rtrs_clt_stats_reconnects_to_str,
	  rtrs_clt_reset_reconnects_stat);

STAT_ATTR(struct rtrs_clt_stats, rdma,
	  rtrs_clt_stats_rdma_to_str,
	  rtrs_clt_reset_rdma_stats);

STAT_ATTR(struct rtrs_clt_stats, reset_all,
	  rtrs_clt_reset_all_help,
	  rtrs_clt_reset_all_stats);

static struct attribute *rtrs_clt_stats_attrs[] = {
	&cpu_migration_attr.attr,
	&reconnects_attr.attr,
	&rdma_attr.attr,
	&reset_all_attr.attr,
	NULL
};

static const struct attribute_group rtrs_clt_stats_attr_group = {
	.attrs = rtrs_clt_stats_attrs,
};

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 sysfs_emit(page, "%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 sysfs_emit(page, "%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 len;

	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	len = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, page,
			      PAGE_SIZE);
	len += sysfs_emit_at(page, len, "\n");
	return len;
}

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 len;

	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	len = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, page,
			      PAGE_SIZE);
	len += sysfs_emit_at(page, len, "\n");
	return len;
}

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 const 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_sess, clt->kobj_paths,
				   "%s", str);
	if (err) {
		pr_err("kobject_init_and_add: %d\n", err);
		kobject_put(&sess->kobj);
		return err;
	}
	err = sysfs_create_group(&sess->kobj, &rtrs_clt_sess_attr_group);
	if (err) {
		pr_err("sysfs_create_group(): %d\n", err);
		goto put_kobj;
	}
	err = kobject_init_and_add(&sess->stats->kobj_stats, &ktype_stats,
				   &sess->kobj, "stats");
	if (err) {
		pr_err("kobject_init_and_add: %d\n", err);
		kobject_put(&sess->stats->kobj_stats);
		goto remove_group;
	}

	err = sysfs_create_group(&sess->stats->kobj_stats,
				 &rtrs_clt_stats_attr_group);
	if (err) {
		pr_err("failed to create stats sysfs group, err: %d\n", err);
		goto put_kobj_stats;
	}

	return 0;

put_kobj_stats:
	kobject_del(&sess->stats->kobj_stats);
	kobject_put(&sess->stats->kobj_stats);
remove_group:
	sysfs_remove_group(&sess->kobj, &rtrs_clt_sess_attr_group);
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)
{
	kobject_del(&sess->stats->kobj_stats);
	kobject_put(&sess->stats->kobj_stats);
	if (sysfs_self)
		sysfs_remove_file_self(&sess->kobj, sysfs_self);
	kobject_del(&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 const struct attribute_group rtrs_clt_attr_group = {
	.attrs = rtrs_clt_attrs,
};

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) {
		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);
}
Commit	Line	Data
215378b8 JW	1	// SPDX-License-Identifier: GPL-2.0-or-later
	2	/*
	3	* RDMA Transport Layer
	4	*
	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.
	8	*/
	9	#undef pr_fmt
	10	#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
	11
	12	#include "rtrs-pri.h"
	13	#include "rtrs-clt.h"
	14	#include "rtrs-log.h"
	15
	16	#define MIN_MAX_RECONN_ATT -1
	17	#define MAX_MAX_RECONN_ATT 9999
	18
	19	static void rtrs_clt_sess_release(struct kobject *kobj)
	20	{
	21	struct rtrs_clt_sess *sess;
	22
	23	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	24
	25	free_sess(sess);
	26	}
	27
	28	static struct kobj_type ktype_sess = {
	29	.sysfs_ops = &kobj_sysfs_ops,
	30	.release = rtrs_clt_sess_release
	31	};
	32
	33	static void rtrs_clt_sess_stats_release(struct kobject *kobj)
	34	{
	35	struct rtrs_clt_stats *stats;
	36
	37	stats = container_of(kobj, struct rtrs_clt_stats, kobj_stats);
	38
	39	free_percpu(stats->pcpu_stats);
	40
	41	kfree(stats);
	42	}
	43
	44	static struct kobj_type ktype_stats = {
	45	.sysfs_ops = &kobj_sysfs_ops,
	46	.release = rtrs_clt_sess_stats_release,
	47	};
	48
	49	static ssize_t max_reconnect_attempts_show(struct device *dev,
	50	struct device_attribute *attr,
	51	char *page)
	52	{
	53	struct rtrs_clt *clt = container_of(dev, struct rtrs_clt, dev);
	54
1c7fd726 JP	55	return sysfs_emit(page, "%d\n",
1c7fd726 JP	56	rtrs_clt_get_max_reconnect_attempts(clt));
215378b8 JW	57	}
	58
	59	static ssize_t max_reconnect_attempts_store(struct device *dev,
	60	struct device_attribute *attr,
	61	const char *buf,
	62	size_t count)
	63	{
	64	int value;
	65	int ret;
	66	struct rtrs_clt *clt = container_of(dev, struct rtrs_clt, dev);
	67
	68	ret = kstrtoint(buf, 10, &value);
	69	if (ret) {
	70	rtrs_err(clt, "%s: failed to convert string '%s' to int\n",
	71	attr->attr.name, buf);
	72	return ret;
	73	}
	74	if (value > MAX_MAX_RECONN_ATT \|\|
	75	value < MIN_MAX_RECONN_ATT) {
	76	rtrs_err(clt,
	77	"%s: invalid range (provided: '%s', accepted: min: %d, max: %d)\n",
	78	attr->attr.name, buf, MIN_MAX_RECONN_ATT,
	79	MAX_MAX_RECONN_ATT);
	80	return -EINVAL;
	81	}
	82	rtrs_clt_set_max_reconnect_attempts(clt, value);
	83
	84	return count;
	85	}
	86
	87	static DEVICE_ATTR_RW(max_reconnect_attempts);
	88
	89	static ssize_t mpath_policy_show(struct device *dev,
	90	struct device_attribute *attr,
	91	char *page)
	92	{
	93	struct rtrs_clt *clt;
	94
	95	clt = container_of(dev, struct rtrs_clt, dev);
	96
	97	switch (clt->mp_policy) {
	98	case MP_POLICY_RR:
1c7fd726 JP	99	return sysfs_emit(page, "round-robin (RR: %d)\n",
1c7fd726 JP	100	clt->mp_policy);
215378b8	101	case MP_POLICY_MIN_INFLIGHT:
1c7fd726 JP	102	return sysfs_emit(page, "min-inflight (MI: %d)\n",
1c7fd726 JP	103	clt->mp_policy);
215378b8	104	default:
1c7fd726	105	return sysfs_emit(page, "Unknown (%d)\n", clt->mp_policy);
215378b8 JW	106	}
	107	}
	108
	109	static ssize_t mpath_policy_store(struct device *dev,
	110	struct device_attribute *attr,
	111	const char *buf,
	112	size_t count)
	113	{
	114	struct rtrs_clt *clt;
	115	int value;
	116	int ret;
	117
	118	clt = container_of(dev, struct rtrs_clt, dev);
	119
	120	ret = kstrtoint(buf, 10, &value);
	121	if (!ret && (value == MP_POLICY_RR \|\|
	122	value == MP_POLICY_MIN_INFLIGHT)) {
	123	clt->mp_policy = value;
	124	return count;
	125	}
	126
	127	if (!strncasecmp(buf, "round-robin", 11) \|\|
	128	!strncasecmp(buf, "rr", 2))
	129	clt->mp_policy = MP_POLICY_RR;
	130	else if (!strncasecmp(buf, "min-inflight", 12) \|\|
	131	!strncasecmp(buf, "mi", 2))
	132	clt->mp_policy = MP_POLICY_MIN_INFLIGHT;
	133	else
	134	return -EINVAL;
	135
	136	return count;
	137	}
	138
	139	static DEVICE_ATTR_RW(mpath_policy);
	140
	141	static ssize_t add_path_show(struct device *dev,
	142	struct device_attribute attr, char page)
	143	{
1c7fd726 JP	144	return sysfs_emit(
	145	page,
	146	"Usage: echo [<source addr>@]<destination addr> > %s\n\n*addr ::= [ ip:<ipv4\|ipv6> \| gid:<gid> ]\n",
	147	attr->attr.name);
215378b8 JW	148	}
	149
	150	static ssize_t add_path_store(struct device *dev,
	151	struct device_attribute *attr,
	152	const char *buf, size_t count)
	153	{
	154	struct sockaddr_storage srcaddr, dstaddr;
	155	struct rtrs_addr addr = {
	156	.src = &srcaddr,
	157	.dst = &dstaddr
	158	};
	159	struct rtrs_clt *clt;
	160	const char *nl;
	161	size_t len;
	162	int err;
	163
	164	clt = container_of(dev, struct rtrs_clt, dev);
	165
	166	nl = strchr(buf, '\n');
	167	if (nl)
	168	len = nl - buf;
	169	else
	170	len = count;
	171	err = rtrs_addr_to_sockaddr(buf, len, clt->port, &addr);
	172	if (err)
	173	return -EINVAL;
	174
	175	err = rtrs_clt_create_path_from_sysfs(clt, &addr);
	176	if (err)
	177	return err;
	178
	179	return count;
	180	}
	181
	182	static DEVICE_ATTR_RW(add_path);
	183
	184	static ssize_t rtrs_clt_state_show(struct kobject *kobj,
	185	struct kobj_attribute attr, char page)
	186	{
	187	struct rtrs_clt_sess *sess;
	188
	189	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	190	if (sess->state == RTRS_CLT_CONNECTED)
3c6bff3c	191	return sysfs_emit(page, "connected\n");
215378b8	192
3c6bff3c	193	return sysfs_emit(page, "disconnected\n");
215378b8 JW	194	}
	195
	196	static struct kobj_attribute rtrs_clt_state_attr =
	197	__ATTR(state, 0444, rtrs_clt_state_show, NULL);
	198
	199	static ssize_t rtrs_clt_reconnect_show(struct kobject *kobj,
3c6bff3c	200	struct kobj_attribute attr, char buf)
215378b8	201	{
3c6bff3c	202	return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
215378b8 JW	203	}
	204
	205	static ssize_t rtrs_clt_reconnect_store(struct kobject *kobj,
	206	struct kobj_attribute *attr,
	207	const char *buf, size_t count)
	208	{
	209	struct rtrs_clt_sess *sess;
	210	int ret;
	211
	212	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	213	if (!sysfs_streq(buf, "1")) {
	214	rtrs_err(sess->clt, "%s: unknown value: '%s'\n",
	215	attr->attr.name, buf);
	216	return -EINVAL;
	217	}
	218	ret = rtrs_clt_reconnect_from_sysfs(sess);
	219	if (ret)
	220	return ret;
	221
	222	return count;
	223	}
	224
	225	static struct kobj_attribute rtrs_clt_reconnect_attr =
	226	__ATTR(reconnect, 0644, rtrs_clt_reconnect_show,
	227	rtrs_clt_reconnect_store);
	228
	229	static ssize_t rtrs_clt_disconnect_show(struct kobject *kobj,
3c6bff3c	230	struct kobj_attribute attr, char buf)
215378b8	231	{
3c6bff3c	232	return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
215378b8 JW	233	}
	234
	235	static ssize_t rtrs_clt_disconnect_store(struct kobject *kobj,
	236	struct kobj_attribute *attr,
	237	const char *buf, size_t count)
	238	{
	239	struct rtrs_clt_sess *sess;
	240	int ret;
	241
	242	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	243	if (!sysfs_streq(buf, "1")) {
	244	rtrs_err(sess->clt, "%s: unknown value: '%s'\n",
	245	attr->attr.name, buf);
	246	return -EINVAL;
	247	}
	248	ret = rtrs_clt_disconnect_from_sysfs(sess);
	249	if (ret)
	250	return ret;
	251
	252	return count;
	253	}
	254
	255	static struct kobj_attribute rtrs_clt_disconnect_attr =
	256	__ATTR(disconnect, 0644, rtrs_clt_disconnect_show,
	257	rtrs_clt_disconnect_store);
	258
	259	static ssize_t rtrs_clt_remove_path_show(struct kobject *kobj,
3c6bff3c	260	struct kobj_attribute attr, char buf)
215378b8	261	{
3c6bff3c	262	return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
215378b8 JW	263	}
	264
	265	static ssize_t rtrs_clt_remove_path_store(struct kobject *kobj,
	266	struct kobj_attribute *attr,
	267	const char *buf, size_t count)
	268	{
	269	struct rtrs_clt_sess *sess;
	270	int ret;
	271
	272	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	273	if (!sysfs_streq(buf, "1")) {
	274	rtrs_err(sess->clt, "%s: unknown value: '%s'\n",
	275	attr->attr.name, buf);
	276	return -EINVAL;
	277	}
	278	ret = rtrs_clt_remove_path_from_sysfs(sess, &attr->attr);
	279	if (ret)
	280	return ret;
	281
	282	return count;
	283	}
	284
	285	static struct kobj_attribute rtrs_clt_remove_path_attr =
	286	__ATTR(remove_path, 0644, rtrs_clt_remove_path_show,
	287	rtrs_clt_remove_path_store);
	288
	289	STAT_ATTR(struct rtrs_clt_stats, cpu_migration,
	290	rtrs_clt_stats_migration_cnt_to_str,
	291	rtrs_clt_reset_cpu_migr_stats);
	292
	293	STAT_ATTR(struct rtrs_clt_stats, reconnects,
	294	rtrs_clt_stats_reconnects_to_str,
	295	rtrs_clt_reset_reconnects_stat);
	296
	297	STAT_ATTR(struct rtrs_clt_stats, rdma,
	298	rtrs_clt_stats_rdma_to_str,
	299	rtrs_clt_reset_rdma_stats);
	300
	301	STAT_ATTR(struct rtrs_clt_stats, reset_all,
	302	rtrs_clt_reset_all_help,
	303	rtrs_clt_reset_all_stats);
	304
	305	static struct attribute *rtrs_clt_stats_attrs[] = {
	306	&cpu_migration_attr.attr,
	307	&reconnects_attr.attr,
	308	&rdma_attr.attr,
	309	&reset_all_attr.attr,
	310	NULL
	311	};
	312
3c4e919b	313	static const struct attribute_group rtrs_clt_stats_attr_group = {
215378b8 JW	314	.attrs = rtrs_clt_stats_attrs,
	315	};
	316
	317	static ssize_t rtrs_clt_hca_port_show(struct kobject *kobj,
	318	struct kobj_attribute *attr,
	319	char *page)
	320	{
	321	struct rtrs_clt_sess *sess;
	322
	323	sess = container_of(kobj, typeof(*sess), kobj);
	324
3c6bff3c	325	return sysfs_emit(page, "%u\n", sess->hca_port);
215378b8 JW	326	}
	327
	328	static struct kobj_attribute rtrs_clt_hca_port_attr =
	329	__ATTR(hca_port, 0444, rtrs_clt_hca_port_show, NULL);
	330
	331	static ssize_t rtrs_clt_hca_name_show(struct kobject *kobj,
	332	struct kobj_attribute *attr,
	333	char *page)
	334	{
	335	struct rtrs_clt_sess *sess;
	336
	337	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
	338
3c6bff3c	339	return sysfs_emit(page, "%s\n", sess->hca_name);
215378b8 JW	340	}
	341
	342	static struct kobj_attribute rtrs_clt_hca_name_attr =
	343	__ATTR(hca_name, 0444, rtrs_clt_hca_name_show, NULL);
	344
	345	static ssize_t rtrs_clt_src_addr_show(struct kobject *kobj,
	346	struct kobj_attribute *attr,
	347	char *page)
	348	{
	349	struct rtrs_clt_sess *sess;
e28bf1f0	350	int len;
215378b8 JW	351
215378b8 JW	352	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
e28bf1f0 JP	353	len = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, page,
	354	PAGE_SIZE);
	355	len += sysfs_emit_at(page, len, "\n");
	356	return len;
215378b8 JW	357	}
	358
	359	static struct kobj_attribute rtrs_clt_src_addr_attr =
	360	__ATTR(src_addr, 0444, rtrs_clt_src_addr_show, NULL);
	361
	362	static ssize_t rtrs_clt_dst_addr_show(struct kobject *kobj,
	363	struct kobj_attribute *attr,
	364	char *page)
	365	{
	366	struct rtrs_clt_sess *sess;
e28bf1f0	367	int len;
215378b8 JW	368
215378b8 JW	369	sess = container_of(kobj, struct rtrs_clt_sess, kobj);
e28bf1f0 JP	370	len = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, page,
	371	PAGE_SIZE);
	372	len += sysfs_emit_at(page, len, "\n");
	373	return len;
215378b8 JW	374	}
	375
	376	static struct kobj_attribute rtrs_clt_dst_addr_attr =
	377	__ATTR(dst_addr, 0444, rtrs_clt_dst_addr_show, NULL);
	378
	379	static struct attribute *rtrs_clt_sess_attrs[] = {
	380	&rtrs_clt_hca_name_attr.attr,
	381	&rtrs_clt_hca_port_attr.attr,
	382	&rtrs_clt_src_addr_attr.attr,
	383	&rtrs_clt_dst_addr_attr.attr,
	384	&rtrs_clt_state_attr.attr,
	385	&rtrs_clt_reconnect_attr.attr,
	386	&rtrs_clt_disconnect_attr.attr,
	387	&rtrs_clt_remove_path_attr.attr,
	388	NULL,
	389	};
	390
3c4e919b	391	static const struct attribute_group rtrs_clt_sess_attr_group = {
215378b8 JW	392	.attrs = rtrs_clt_sess_attrs,
	393	};
	394
	395	int rtrs_clt_create_sess_files(struct rtrs_clt_sess *sess)
	396	{
	397	struct rtrs_clt *clt = sess->clt;
	398	char str[NAME_MAX];
	399	int err, cnt;
	400
	401	cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr,
	402	str, sizeof(str));
	403	cnt += scnprintf(str + cnt, sizeof(str) - cnt, "@");
	404	sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
	405	str + cnt, sizeof(str) - cnt);
	406
	407	err = kobject_init_and_add(&sess->kobj, &ktype_sess, clt->kobj_paths,
	408	"%s", str);
	409	if (err) {
	410	pr_err("kobject_init_and_add: %d\n", err);
424774c9	411	kobject_put(&sess->kobj);
215378b8 JW	412	return err;
	413	}
	414	err = sysfs_create_group(&sess->kobj, &rtrs_clt_sess_attr_group);
	415	if (err) {
	416	pr_err("sysfs_create_group(): %d\n", err);
	417	goto put_kobj;
	418	}
	419	err = kobject_init_and_add(&sess->stats->kobj_stats, &ktype_stats,
	420	&sess->kobj, "stats");
	421	if (err) {
	422	pr_err("kobject_init_and_add: %d\n", err);
424774c9	423	kobject_put(&sess->stats->kobj_stats);
215378b8 JW	424	goto remove_group;
	425	}
	426
	427	err = sysfs_create_group(&sess->stats->kobj_stats,
	428	&rtrs_clt_stats_attr_group);
	429	if (err) {
	430	pr_err("failed to create stats sysfs group, err: %d\n", err);
	431	goto put_kobj_stats;
	432	}
	433
	434	return 0;
	435
	436	put_kobj_stats:
	437	kobject_del(&sess->stats->kobj_stats);
	438	kobject_put(&sess->stats->kobj_stats);
	439	remove_group:
	440	sysfs_remove_group(&sess->kobj, &rtrs_clt_sess_attr_group);
	441	put_kobj:
	442	kobject_del(&sess->kobj);
	443	kobject_put(&sess->kobj);
	444
	445	return err;
	446	}
	447
	448	void rtrs_clt_destroy_sess_files(struct rtrs_clt_sess *sess,
	449	const struct attribute *sysfs_self)
	450	{
	451	kobject_del(&sess->stats->kobj_stats);
	452	kobject_put(&sess->stats->kobj_stats);
	453	if (sysfs_self)
	454	sysfs_remove_file_self(&sess->kobj, sysfs_self);
	455	kobject_del(&sess->kobj);
	456	}
	457
	458	static struct attribute *rtrs_clt_attrs[] = {
	459	&dev_attr_max_reconnect_attempts.attr,
	460	&dev_attr_mpath_policy.attr,
	461	&dev_attr_add_path.attr,
	462	NULL,
	463	};
	464
3c4e919b	465	static const struct attribute_group rtrs_clt_attr_group = {
215378b8 JW	466	.attrs = rtrs_clt_attrs,
	467	};
	468
	469	int rtrs_clt_create_sysfs_root_files(struct rtrs_clt *clt)
	470	{
	471	return sysfs_create_group(&clt->dev.kobj, &rtrs_clt_attr_group);
	472	}
	473
	474	void rtrs_clt_destroy_sysfs_root_folders(struct rtrs_clt *clt)
	475	{
	476	if (clt->kobj_paths) {
	477	kobject_del(clt->kobj_paths);
	478	kobject_put(clt->kobj_paths);
	479	}
	480	}
	481
	482	void rtrs_clt_destroy_sysfs_root_files(struct rtrs_clt *clt)
	483	{
	484	sysfs_remove_group(&clt->dev.kobj, &rtrs_clt_attr_group);
	485	}