OpenCloudOS-Kernel/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c

314 lines
7.8 KiB
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-srv.h"
#include "rtrs-log.h"
static void rtrs_srv_release(struct kobject *kobj)
{
struct rtrs_srv_path *srv_path;
srv_path = container_of(kobj, struct rtrs_srv_path, kobj);
kfree(srv_path);
}
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 *buf)
{
return sysfs_emit(buf, "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_path *srv_path;
struct rtrs_path *s;
char str[MAXHOSTNAMELEN];
srv_path = container_of(kobj, struct rtrs_srv_path, kobj);
s = &srv_path->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 *)&srv_path->s.dst_addr, str,
sizeof(str));
rtrs_info(s, "disconnect for path %s requested\n", str);
/* first remove sysfs itself to avoid deadlock */
sysfs_remove_file_self(&srv_path->kobj, &attr->attr);
close_path(srv_path);
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_path *srv_path;
struct rtrs_con *usr_con;
srv_path = container_of(kobj, typeof(*srv_path), kobj);
usr_con = srv_path->s.con[0];
return sysfs_emit(page, "%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_path *srv_path;
srv_path = container_of(kobj, struct rtrs_srv_path, kobj);
return sysfs_emit(page, "%s\n", srv_path->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_path *srv_path;
int cnt;
srv_path = container_of(kobj, struct rtrs_srv_path, kobj);
cnt = sockaddr_to_str((struct sockaddr *)&srv_path->s.dst_addr,
page, PAGE_SIZE);
return cnt + sysfs_emit_at(page, 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_path *srv_path;
int len;
srv_path = container_of(kobj, struct rtrs_srv_path, kobj);
len = sockaddr_to_str((struct sockaddr *)&srv_path->s.src_addr, page,
PAGE_SIZE);
len += sysfs_emit_at(page, len, "\n");
return len;
}
static struct kobj_attribute rtrs_srv_dst_addr_attr =
__ATTR(dst_addr, 0444, rtrs_srv_dst_addr_show, NULL);
static struct attribute *rtrs_srv_path_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 const struct attribute_group rtrs_srv_path_attr_group = {
.attrs = rtrs_srv_path_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 const struct attribute_group rtrs_srv_stats_attr_group = {
.attrs = rtrs_srv_stats_attrs,
};
static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_path *srv_path)
{
struct rtrs_srv_sess *srv = srv_path->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;
err = dev_set_name(&srv->dev, "%s", srv_path->s.sessname);
if (err)
goto unlock;
/*
* Suppress user space notification until
* sysfs files are created
*/
dev_set_uevent_suppress(&srv->dev, true);
err = device_add(&srv->dev);
if (err) {
pr_err("device_add(): %d\n", err);
put_device(&srv->dev);
goto unlock;
}
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_del(&srv->dev);
put_device(&srv->dev);
goto unlock;
}
dev_set_uevent_suppress(&srv->dev, false);
kobject_uevent(&srv->dev.kobj, KOBJ_ADD);
unlock:
mutex_unlock(&srv->paths_mutex);
return err;
}
static void
rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_path *srv_path)
{
struct rtrs_srv_sess *srv = srv_path->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_del(&srv->dev);
put_device(&srv->dev);
} else {
put_device(&srv->dev);
mutex_unlock(&srv->paths_mutex);
}
}
static void rtrs_srv_path_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_path_stats_release,
};
static int rtrs_srv_create_stats_files(struct rtrs_srv_path *srv_path)
{
int err;
struct rtrs_path *s = &srv_path->s;
err = kobject_init_and_add(&srv_path->stats->kobj_stats, &ktype_stats,
&srv_path->kobj, "stats");
if (err) {
rtrs_err(s, "kobject_init_and_add(): %d\n", err);
kobject_put(&srv_path->stats->kobj_stats);
return err;
}
err = sysfs_create_group(&srv_path->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(&srv_path->stats->kobj_stats);
kobject_put(&srv_path->stats->kobj_stats);
return err;
}
int rtrs_srv_create_path_files(struct rtrs_srv_path *srv_path)
{
struct rtrs_srv_sess *srv = srv_path->srv;
struct rtrs_path *s = &srv_path->s;
char str[NAME_MAX];
int err;
struct rtrs_addr path = {
.src = &srv_path->s.dst_addr,
.dst = &srv_path->s.src_addr,
};
rtrs_addr_to_str(&path, str, sizeof(str));
err = rtrs_srv_create_once_sysfs_root_folders(srv_path);
if (err)
return err;
err = kobject_init_and_add(&srv_path->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(&srv_path->kobj, &rtrs_srv_path_attr_group);
if (err) {
rtrs_err(s, "sysfs_create_group(): %d\n", err);
goto put_kobj;
}
err = rtrs_srv_create_stats_files(srv_path);
if (err)
goto remove_group;
return 0;
remove_group:
sysfs_remove_group(&srv_path->kobj, &rtrs_srv_path_attr_group);
put_kobj:
kobject_del(&srv_path->kobj);
destroy_root:
kobject_put(&srv_path->kobj);
rtrs_srv_destroy_once_sysfs_root_folders(srv_path);
return err;
}
void rtrs_srv_destroy_path_files(struct rtrs_srv_path *srv_path)
{
if (srv_path->kobj.state_in_sysfs) {
kobject_del(&srv_path->stats->kobj_stats);
kobject_put(&srv_path->stats->kobj_stats);
sysfs_remove_group(&srv_path->kobj, &rtrs_srv_path_attr_group);
kobject_put(&srv_path->kobj);
rtrs_srv_destroy_once_sysfs_root_folders(srv_path);
}
}