314 lines
7.8 KiB
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);
|
|
}
|
|
}
|