#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_path_release(struct kobject *kobj)
{
struct rtrs_clt_path *clt_path;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
free_path(clt_path);
}
static struct kobj_type ktype_sess = {
.sysfs_ops = &kobj_sysfs_ops,
.release = rtrs_clt_path_release
};
static void rtrs_clt_path_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_path_stats_release,
};
static ssize_t max_reconnect_attempts_show(struct device *dev,
struct device_attribute *attr,
char *page)
{
struct rtrs_clt_sess *clt = container_of(dev, struct rtrs_clt_sess,
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_sess *clt = container_of(dev, struct rtrs_clt_sess,
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_sess *clt;
clt = container_of(dev, struct rtrs_clt_sess, 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);
case MP_POLICY_MIN_LATENCY:
return sysfs_emit(page, "min-latency (ML: %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_sess *clt;
int value;
int ret;
size_t len = 0;
clt = container_of(dev, struct rtrs_clt_sess, dev);
ret = kstrtoint(buf, 10, &value);
if (!ret && (value == MP_POLICY_RR ||
value == MP_POLICY_MIN_INFLIGHT ||
value == MP_POLICY_MIN_LATENCY)) {
clt->mp_policy = value;
return count;
}
len = strnlen(buf, NAME_MAX);
if (len && buf[len - 1] == '\n')
len--;
if (!strncasecmp(buf, "round-robin", 11) ||
(len == 2 && !strncasecmp(buf, "rr", 2)))
clt->mp_policy = MP_POLICY_RR;
else if (!strncasecmp(buf, "min-inflight", 12) ||
(len == 2 && !strncasecmp(buf, "mi", 2)))
clt->mp_policy = MP_POLICY_MIN_INFLIGHT;
else if (!strncasecmp(buf, "min-latency", 11) ||
(len == 2 && !strncasecmp(buf, "ml", 2)))
clt->mp_policy = MP_POLICY_MIN_LATENCY;
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_sess *clt;
const char *nl;
size_t len;
int err;
clt = container_of(dev, struct rtrs_clt_sess, 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_path *clt_path;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
if (clt_path->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_path *clt_path;
int ret;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
if (!sysfs_streq(buf, "1")) {
rtrs_err(clt_path->clt, "%s: unknown value: '%s'\n",
attr->attr.name, buf);
return -EINVAL;
}
ret = rtrs_clt_reconnect_from_sysfs(clt_path);
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_path *clt_path;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
if (!sysfs_streq(buf, "1")) {
rtrs_err(clt_path->clt, "%s: unknown value: '%s'\n",
attr->attr.name, buf);
return -EINVAL;
}
rtrs_clt_close_conns(clt_path, true);
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_path *clt_path;
int ret;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
if (!sysfs_streq(buf, "1")) {
rtrs_err(clt_path->clt, "%s: unknown value: '%s'\n",
attr->attr.name, buf);
return -EINVAL;
}
ret = rtrs_clt_remove_path_from_sysfs(clt_path, &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_from,
rtrs_clt_stats_migration_from_cnt_to_str,
rtrs_clt_reset_cpu_migr_stats);
STAT_ATTR(struct rtrs_clt_stats, cpu_migration_to,
rtrs_clt_stats_migration_to_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_from_attr.attr,
&cpu_migration_to_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_path *clt_path;
clt_path = container_of(kobj, typeof(*clt_path), kobj);
return sysfs_emit(page, "%u\n", clt_path->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_path *clt_path;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
return sysfs_emit(page, "%s\n", clt_path->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_cur_latency_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *page)
{
struct rtrs_clt_path *clt_path;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
return sysfs_emit(page, "%lld ns\n",
ktime_to_ns(clt_path->s.hb_cur_latency));
}
static struct kobj_attribute rtrs_clt_cur_latency_attr =
__ATTR(cur_latency, 0444, rtrs_clt_cur_latency_show, NULL);
static ssize_t rtrs_clt_src_addr_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *page)
{
struct rtrs_clt_path *clt_path;
int len;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
len = sockaddr_to_str((struct sockaddr *)&clt_path->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_path *clt_path;
int len;
clt_path = container_of(kobj, struct rtrs_clt_path, kobj);
len = sockaddr_to_str((struct sockaddr *)&clt_path->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_path_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,
&rtrs_clt_cur_latency_attr.attr,
NULL,
};
static const struct attribute_group rtrs_clt_path_attr_group = {
.attrs = rtrs_clt_path_attrs,
};
int rtrs_clt_create_path_files(struct rtrs_clt_path *clt_path)
{
struct rtrs_clt_sess *clt = clt_path->clt;
char str[NAME_MAX];
int err;
struct rtrs_addr path = {
.src = &clt_path->s.src_addr,
.dst = &clt_path->s.dst_addr,
};
rtrs_addr_to_str(&path, str, sizeof(str));
err = kobject_init_and_add(&clt_path->kobj, &ktype_sess,
clt->kobj_paths,
"%s", str);
if (err) {
pr_err("kobject_init_and_add: %pe\n", ERR_PTR(err));
kobject_put(&clt_path->kobj);
return err;
}
err = sysfs_create_group(&clt_path->kobj, &rtrs_clt_path_attr_group);
if (err) {
pr_err("sysfs_create_group(): %pe\n", ERR_PTR(err));
goto put_kobj;
}
err = kobject_init_and_add(&clt_path->stats->kobj_stats, &ktype_stats,
&clt_path->kobj, "stats");
if (err) {
pr_err("kobject_init_and_add: %pe\n", ERR_PTR(err));
kobject_put(&clt_path->stats->kobj_stats);
goto remove_group;
}
err = sysfs_create_group(&clt_path->stats->kobj_stats,
&rtrs_clt_stats_attr_group);
if (err) {
pr_err("failed to create stats sysfs group, err: %pe\n", ERR_PTR(err));
goto put_kobj_stats;
}
return 0;
put_kobj_stats:
kobject_del(&clt_path->stats->kobj_stats);
kobject_put(&clt_path->stats->kobj_stats);
remove_group:
sysfs_remove_group(&clt_path->kobj, &rtrs_clt_path_attr_group);
put_kobj:
kobject_del(&clt_path->kobj);
kobject_put(&clt_path->kobj);
return err;
}
void rtrs_clt_destroy_path_files(struct rtrs_clt_path *clt_path,
const struct attribute *sysfs_self)
{
kobject_del(&clt_path->stats->kobj_stats);
kobject_put(&clt_path->stats->kobj_stats);
if (sysfs_self)
sysfs_remove_file_self(&clt_path->kobj, sysfs_self);
kobject_del(&clt_path->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_sess *clt)
{
return sysfs_create_group(&clt->dev.kobj, &rtrs_clt_attr_group);
}
void rtrs_clt_destroy_sysfs_root(struct rtrs_clt_sess *clt)
{
sysfs_remove_group(&clt->dev.kobj, &rtrs_clt_attr_group);
if (clt->kobj_paths) {
kobject_del(clt->kobj_paths);
kobject_put(clt->kobj_paths);
}
}
