path: root/drivers/s390/net/qeth_l3_sys.c

// SPDX-License-Identifier: GPL-2.0
/*
 *    Copyright IBM Corp. 2007
 *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
 *		 Frank Pavlic <fpavlic@de.ibm.com>,
 *		 Thomas Spatzier <tspat@de.ibm.com>,
 *		 Frank Blaschka <frank.blaschka@de.ibm.com>
 */

#include <linux/slab.h>
#include <asm/ebcdic.h>
#include <linux/hashtable.h>
#include <linux/inet.h>
#include "qeth_l3.h"

#define QETH_DEVICE_ATTR(_id, _name, _mode, _show, _store) \
struct device_attribute dev_attr_##_id = __ATTR(_name, _mode, _show, _store)

static int qeth_l3_string_to_ipaddr(const char *buf,
				    enum qeth_prot_versions proto, u8 *addr)
{
	const char *end;

	if ((proto == QETH_PROT_IPV4 && !in4_pton(buf, -1, addr, -1, &end)) ||
	    (proto == QETH_PROT_IPV6 && !in6_pton(buf, -1, addr, -1, &end)))
		return -EINVAL;
	return 0;
}

static ssize_t qeth_l3_dev_route_show(struct qeth_card *card,
			struct qeth_routing_info *route, char *buf)
{
	switch (route->type) {
	case PRIMARY_ROUTER:
		return sprintf(buf, "%s\n", "primary router");
	case SECONDARY_ROUTER:
		return sprintf(buf, "%s\n", "secondary router");
	case MULTICAST_ROUTER:
		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
			return sprintf(buf, "%s\n", "multicast router+");
		else
			return sprintf(buf, "%s\n", "multicast router");
	case PRIMARY_CONNECTOR:
		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
			return sprintf(buf, "%s\n", "primary connector+");
		else
			return sprintf(buf, "%s\n", "primary connector");
	case SECONDARY_CONNECTOR:
		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
			return sprintf(buf, "%s\n", "secondary connector+");
		else
			return sprintf(buf, "%s\n", "secondary connector");
	default:
		return sprintf(buf, "%s\n", "no");
	}
}

static ssize_t qeth_l3_dev_route4_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct qeth_card *card = dev_get_drvdata(dev);

	if (!card)
		return -EINVAL;

	return qeth_l3_dev_route_show(card, &card->options.route4, buf);
}

static ssize_t qeth_l3_dev_route_store(struct qeth_card *card,
		struct qeth_routing_info *route, enum qeth_prot_versions prot,
		const char *buf, size_t count)
{
	enum qeth_routing_types old_route_type = route->type;
	int rc = 0;

	mutex_lock(&card->conf_mutex);
	if (sysfs_streq(buf, "no_router")) {
		route->type = NO_ROUTER;
	} else if (sysfs_streq(buf, "primary_connector")) {
		route->type = PRIMARY_CONNECTOR;
	} else if (sysfs_streq(buf, "secondary_connector")) {
		route->type = SECONDARY_CONNECTOR;
	} else if (sysfs_streq(buf, "primary_router")) {
		route->type = PRIMARY_ROUTER;
	} else if (sysfs_streq(buf, "secondary_router")) {
		route->type = SECONDARY_ROUTER;
	} else if (sysfs_streq(buf, "multicast_router")) {
		route->type = MULTICAST_ROUTER;
	} else {
		rc = -EINVAL;
		goto out;
	}
	if (qeth_card_hw_is_reachable(card) &&
	    (old_route_type != route->type)) {
		if (prot == QETH_PROT_IPV4)
			rc = qeth_l3_setrouting_v4(card);
		else if (prot == QETH_PROT_IPV6)
			rc = qeth_l3_setrouting_v6(card);
	}
out:
	if (rc)
		route->type = old_route_type;
	mutex_unlock(&card->conf_mutex);
	return rc ? rc : count;
}

static ssize_t qeth_l3_dev_route4_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct qeth_card *card = dev_get_drvdata(dev);

	if (!card)
		return -EINVAL;

	return qeth_l3_dev_route_store(card, &card->options.route4,
				QETH_PROT_IPV4, buf, count);
}

static DEVICE_ATTR(route4, 0644, qeth_l3_dev_route4_show,
			qeth_l3_dev_route4_store);

static ssize_t qeth_l3_dev_route6_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct qeth_card *card = dev_get_drvdata(dev);

	if (!card)
		return -EINVAL;

	return qeth_l3_dev_route_show(card, &card->options.route6, buf);
}

static ssize_t qeth_l3_dev_route6_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct qeth_card *card = dev_get_drvdata(dev);

	if (!card)
		return -EINVAL;

	return qeth_l3_dev_route_store(card, &card->options.route6,
				QETH_PROT_IPV6, buf, count);
}

static DEVICE_ATTR(route6, 0644, qeth_l3_dev_route6_show,
			qeth_l3_dev_route6_store);

static ssize_t qeth_l3_dev_fake_broadcast_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{</