drivers/s390/net/qeth_l3_sys.c - third_party/kernel - Git at Google

 // 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);

 	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);

 	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);

 	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);

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

 	return sprintf(buf, "%i\n", card->options.sniffer ? 1 : 0);
 }

 static ssize_t qeth_l3_dev_sniffer_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	int rc = 0;
 	unsigned long i;

 	if (!IS_IQD(card))
 		return -EPERM;
 	if (card->options.cq == QETH_CQ_ENABLED)
 		return -EPERM;

 	mutex_lock(&card->conf_mutex);
 	if (card->state != CARD_STATE_DOWN) {
 		rc = -EPERM;
 		goto out;
 	}

 	rc = kstrtoul(buf, 16, &i);
 	if (rc) {
 		rc = -EINVAL;
 		goto out;
 	}
 	switch (i) {
 	case 0:
 		card->options.sniffer = i;
 		break;
 	case 1:
 		qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd);
 		if (card->ssqd.qdioac2 & CHSC_AC2_SNIFFER_AVAILABLE) {
 			card->options.sniffer = i;
 			qeth_resize_buffer_pool(card, QETH_IN_BUF_COUNT_MAX);
 		} else {
 			rc = -EPERM;
 		}

 		break;
 	default:
 		rc = -EINVAL;
 	}
 out:
 	mutex_unlock(&card->conf_mutex);
 	return rc ? rc : count;
 }

 static DEVICE_ATTR(sniffer, 0644, qeth_l3_dev_sniffer_show,
 		qeth_l3_dev_sniffer_store);

 static ssize_t qeth_l3_dev_hsuid_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	char tmp_hsuid[9];

 	if (!IS_IQD(card))
 		return -EPERM;

 	memcpy(tmp_hsuid, card->options.hsuid, sizeof(tmp_hsuid));
 	EBCASC(tmp_hsuid, 8);
 	return sprintf(buf, "%s\n", tmp_hsuid);
 }

 static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	int rc = 0;
 	char *tmp;

 	if (!IS_IQD(card))
 		return -EPERM;

 	mutex_lock(&card->conf_mutex);
 	if (card->state != CARD_STATE_DOWN) {
 		rc = -EPERM;
 		goto out;
 	}

 	if (card->options.sniffer) {
 		rc = -EPERM;
 		goto out;
 	}

 	if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
 		rc = -EPERM;
 		goto out;
 	}

 	tmp = strsep((char **)&buf, "\n");
 	if (strlen(tmp) > 8) {
 		rc = -EINVAL;
 		goto out;
 	}

 	if (card->options.hsuid[0])
 		/* delete old ip address */
 		qeth_l3_modify_hsuid(card, false);

 	if (strlen(tmp) == 0) {
 		/* delete ip address only */
 		card->options.hsuid[0] = '\0';
 		memcpy(card->dev->perm_addr, card->options.hsuid, 9);
 		qeth_configure_cq(card, QETH_CQ_DISABLED);
 		goto out;
 	}

 	if (qeth_configure_cq(card, QETH_CQ_ENABLED)) {
 		rc = -EPERM;
 		goto out;
 	}

 	snprintf(card->options.hsuid, sizeof(card->options.hsuid),
 		 "%-8s", tmp);
 	ASCEBC(card->options.hsuid, 8);
 	memcpy(card->dev->perm_addr, card->options.hsuid, 9);

 	rc = qeth_l3_modify_hsuid(card, true);

 out:
 	mutex_unlock(&card->conf_mutex);
 	return rc ? rc : count;
 }

 static DEVICE_ATTR(hsuid, 0644, qeth_l3_dev_hsuid_show,
 		   qeth_l3_dev_hsuid_store);


 static struct attribute *qeth_l3_device_attrs[] = {
 	&dev_attr_route4.attr,
 	&dev_attr_route6.attr,
 	&dev_attr_sniffer.attr,
 	&dev_attr_hsuid.attr,
 	NULL,
 };

 static const struct attribute_group qeth_l3_device_attr_group = {
 	.attrs = qeth_l3_device_attrs,
 };

 static ssize_t qeth_l3_dev_ipato_enable_show(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return sprintf(buf, "%u\n", card->ipato.enabled ? 1 : 0);
 }

 static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	bool enable;
 	int rc = 0;

 	mutex_lock(&card->conf_mutex);
 	if (card->state != CARD_STATE_DOWN) {
 		rc = -EPERM;
 		goto out;
 	}

 	mutex_lock(&card->ip_lock);
 	if (sysfs_streq(buf, "toggle")) {
 		enable = !card->ipato.enabled;
 	} else if (kstrtobool(buf, &enable)) {
 		rc = -EINVAL;
 		goto unlock_ip;
 	}

 	if (card->ipato.enabled != enable) {
 		card->ipato.enabled = enable;
 		qeth_l3_update_ipato(card);
 	}

 unlock_ip:
 	mutex_unlock(&card->ip_lock);
 out:
 	mutex_unlock(&card->conf_mutex);
 	return rc ? rc : count;
 }

 static QETH_DEVICE_ATTR(ipato_enable, enable, 0644,
 			qeth_l3_dev_ipato_enable_show,
 			qeth_l3_dev_ipato_enable_store);

 static ssize_t qeth_l3_dev_ipato_invert4_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return sprintf(buf, "%u\n", card->ipato.invert4 ? 1 : 0);
 }

 static ssize_t qeth_l3_dev_ipato_invert4_store(struct device *dev,
 				struct device_attribute *attr,
 				const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	bool invert;
 	int rc = 0;

 	mutex_lock(&card->ip_lock);
 	if (sysfs_streq(buf, "toggle")) {
 		invert = !card->ipato.invert4;
 	} else if (kstrtobool(buf, &invert)) {
 		rc = -EINVAL;
 		goto out;
 	}

 	if (card->ipato.invert4 != invert) {
 		card->ipato.invert4 = invert;
 		qeth_l3_update_ipato(card);
 	}

 out:
 	mutex_unlock(&card->ip_lock);
 	return rc ? rc : count;
 }

 static QETH_DEVICE_ATTR(ipato_invert4, invert4, 0644,
 			qeth_l3_dev_ipato_invert4_show,
 			qeth_l3_dev_ipato_invert4_store);

 static ssize_t qeth_l3_dev_ipato_add_show(char *buf, struct qeth_card *card,
 			enum qeth_prot_versions proto)
 {
 	struct qeth_ipato_entry *ipatoe;
 	int str_len = 0;

 	mutex_lock(&card->ip_lock);
 	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 		char addr_str[40];
 		int entry_len;

 		if (ipatoe->proto != proto)
 			continue;

 		entry_len = qeth_l3_ipaddr_to_string(proto, ipatoe->addr,
 						     addr_str);
 		if (entry_len < 0)
 			continue;

 		/* Append /%mask to the entry: */
 		entry_len += 1 + ((proto == QETH_PROT_IPV4) ? 2 : 3);
 		/* Enough room to format %entry\n into null terminated page? */
 		if (entry_len + 1 > PAGE_SIZE - str_len - 1)
 			break;

 		entry_len = scnprintf(buf, PAGE_SIZE - str_len,
 				      "%s/%i\n", addr_str, ipatoe->mask_bits);
 		str_len += entry_len;
 		buf += entry_len;
 	}
 	mutex_unlock(&card->ip_lock);

 	return str_len ? str_len : scnprintf(buf, PAGE_SIZE, "\n");
 }

 static ssize_t qeth_l3_dev_ipato_add4_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return qeth_l3_dev_ipato_add_show(buf, card, QETH_PROT_IPV4);
 }

 static int qeth_l3_parse_ipatoe(const char *buf, enum qeth_prot_versions proto,
 				u8 *addr, unsigned int *mask_bits)
 {
 	char *sep;
 	int rc;

 	/* Expected input pattern: %addr/%mask */
 	sep = strnchr(buf, 40, '/');
 	if (!sep)
 		return -EINVAL;

 	/* Terminate the %addr sub-string, and parse it: */
 	*sep = '\0';
 	rc = qeth_l3_string_to_ipaddr(buf, proto, addr);
 	if (rc)
 		return rc;

 	rc = kstrtouint(sep + 1, 10, mask_bits);
 	if (rc)
 		return rc;

 	if (*mask_bits > ((proto == QETH_PROT_IPV4) ? 32 : 128))
 		return -EINVAL;

 	return 0;
 }

 static ssize_t qeth_l3_dev_ipato_add_store(const char *buf, size_t count,
 			 struct qeth_card *card, enum qeth_prot_versions proto)
 {
 	struct qeth_ipato_entry *ipatoe;
 	unsigned int mask_bits;
 	u8 addr[16];
 	int rc = 0;

 	rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
 	if (rc)
 		return rc;

 	ipatoe = kzalloc(sizeof(struct qeth_ipato_entry), GFP_KERNEL);
 	if (!ipatoe)
 		return -ENOMEM;

 	ipatoe->proto = proto;
 	memcpy(ipatoe->addr, addr, (proto == QETH_PROT_IPV4) ? 4 : 16);
 	ipatoe->mask_bits = mask_bits;

 	rc = qeth_l3_add_ipato_entry(card, ipatoe);
 	if (rc)
 		kfree(ipatoe);

 	return rc ? rc : count;
 }

 static ssize_t qeth_l3_dev_ipato_add4_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return qeth_l3_dev_ipato_add_store(buf, count, card, QETH_PROT_IPV4);
 }

 static QETH_DEVICE_ATTR(ipato_add4, add4, 0644,
 			qeth_l3_dev_ipato_add4_show,
 			qeth_l3_dev_ipato_add4_store);

 static ssize_t qeth_l3_dev_ipato_del_store(const char *buf, size_t count,
 			 struct qeth_card *card, enum qeth_prot_versions proto)
 {
 	unsigned int mask_bits;
 	u8 addr[16];
 	int rc = 0;

 	rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
 	if (!rc)
 		rc = qeth_l3_del_ipato_entry(card, proto, addr, mask_bits);
 	return rc ? rc : count;
 }

 static ssize_t qeth_l3_dev_ipato_del4_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return qeth_l3_dev_ipato_del_store(buf, count, card, QETH_PROT_IPV4);
 }

 static QETH_DEVICE_ATTR(ipato_del4, del4, 0200, NULL,
 			qeth_l3_dev_ipato_del4_store);

 static ssize_t qeth_l3_dev_ipato_invert6_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return sprintf(buf, "%u\n", card->ipato.invert6 ? 1 : 0);
 }

 static ssize_t qeth_l3_dev_ipato_invert6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	bool invert;
 	int rc = 0;

 	mutex_lock(&card->ip_lock);
 	if (sysfs_streq(buf, "toggle")) {
 		invert = !card->ipato.invert6;
 	} else if (kstrtobool(buf, &invert)) {
 		rc = -EINVAL;
 		goto out;
 	}

 	if (card->ipato.invert6 != invert) {
 		card->ipato.invert6 = invert;
 		qeth_l3_update_ipato(card);
 	}

 out:
 	mutex_unlock(&card->ip_lock);
 	return rc ? rc : count;
 }

 static QETH_DEVICE_ATTR(ipato_invert6, invert6, 0644,
 			qeth_l3_dev_ipato_invert6_show,
 			qeth_l3_dev_ipato_invert6_store);


 static ssize_t qeth_l3_dev_ipato_add6_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return qeth_l3_dev_ipato_add_show(buf, card, QETH_PROT_IPV6);
 }

 static ssize_t qeth_l3_dev_ipato_add6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return qeth_l3_dev_ipato_add_store(buf, count, card, QETH_PROT_IPV6);
 }

 static QETH_DEVICE_ATTR(ipato_add6, add6, 0644,
 			qeth_l3_dev_ipato_add6_show,
 			qeth_l3_dev_ipato_add6_store);

 static ssize_t qeth_l3_dev_ipato_del6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);

 	return qeth_l3_dev_ipato_del_store(buf, count, card, QETH_PROT_IPV6);
 }

 static QETH_DEVICE_ATTR(ipato_del6, del6, 0200, NULL,
 			qeth_l3_dev_ipato_del6_store);

 static struct attribute *qeth_ipato_device_attrs[] = {
 	&dev_attr_ipato_enable.attr,
 	&dev_attr_ipato_invert4.attr,
 	&dev_attr_ipato_add4.attr,
 	&dev_attr_ipato_del4.attr,
 	&dev_attr_ipato_invert6.attr,
 	&dev_attr_ipato_add6.attr,
 	&dev_attr_ipato_del6.attr,
 	NULL,
 };

 static const struct attribute_group qeth_device_ipato_group = {
 	.name = "ipa_takeover",
 	.attrs = qeth_ipato_device_attrs,
 };

 static ssize_t qeth_l3_dev_ip_add_show(struct device *dev, char *buf,
 				       enum qeth_prot_versions proto,
 				       enum qeth_ip_types type)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	struct qeth_ipaddr *ipaddr;
 	int str_len = 0;
 	int i;

 	mutex_lock(&card->ip_lock);
 	hash_for_each(card->ip_htable, i, ipaddr, hnode) {
 		char addr_str[40];
 		int entry_len;

 		if (ipaddr->proto != proto || ipaddr->type != type)
 			continue;

 		entry_len = qeth_l3_ipaddr_to_string(proto, (u8 *)&ipaddr->u,
 						     addr_str);
 		if (entry_len < 0)
 			continue;

 		/* Enough room to format %addr\n into null terminated page? */
 		if (entry_len + 1 > PAGE_SIZE - str_len - 1)
 			break;

 		entry_len = scnprintf(buf, PAGE_SIZE - str_len, "%s\n",
 				      addr_str);
 		str_len += entry_len;
 		buf += entry_len;
 	}
 	mutex_unlock(&card->ip_lock);

 	return str_len ? str_len : scnprintf(buf, PAGE_SIZE, "\n");
 }

 static ssize_t qeth_l3_dev_vipa_add4_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
 	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
 				       QETH_IP_TYPE_VIPA);
 }

 static ssize_t qeth_l3_vipa_store(struct device *dev, const char *buf, bool add,
 				  size_t count, enum qeth_prot_versions proto)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	u8 addr[16] = {0, };
 	int rc;

 	rc = qeth_l3_string_to_ipaddr(buf, proto, addr);
 	if (!rc)
 		rc = qeth_l3_modify_rxip_vipa(card, add, addr,
 					      QETH_IP_TYPE_VIPA, proto);
 	return rc ? rc : count;
 }

 static ssize_t qeth_l3_dev_vipa_add4_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV4);
 }

 static QETH_DEVICE_ATTR(vipa_add4, add4, 0644,
 			qeth_l3_dev_vipa_add4_show,
 			qeth_l3_dev_vipa_add4_store);

 static ssize_t qeth_l3_dev_vipa_del4_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_vipa_store(dev, buf, false, count, QETH_PROT_IPV4);
 }

 static QETH_DEVICE_ATTR(vipa_del4, del4, 0200, NULL,
 			qeth_l3_dev_vipa_del4_store);

 static ssize_t qeth_l3_dev_vipa_add6_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
 	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV6,
 				       QETH_IP_TYPE_VIPA);
 }

 static ssize_t qeth_l3_dev_vipa_add6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV6);
 }

 static QETH_DEVICE_ATTR(vipa_add6, add6, 0644,
 			qeth_l3_dev_vipa_add6_show,
 			qeth_l3_dev_vipa_add6_store);

 static ssize_t qeth_l3_dev_vipa_del6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_vipa_store(dev, buf, false, count, QETH_PROT_IPV6);
 }

 static QETH_DEVICE_ATTR(vipa_del6, del6, 0200, NULL,
 			qeth_l3_dev_vipa_del6_store);

 static struct attribute *qeth_vipa_device_attrs[] = {
 	&dev_attr_vipa_add4.attr,
 	&dev_attr_vipa_del4.attr,
 	&dev_attr_vipa_add6.attr,
 	&dev_attr_vipa_del6.attr,
 	NULL,
 };

 static const struct attribute_group qeth_device_vipa_group = {
 	.name = "vipa",
 	.attrs = qeth_vipa_device_attrs,
 };

 static ssize_t qeth_l3_dev_rxip_add4_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
 	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
 				       QETH_IP_TYPE_RXIP);
 }

 static int qeth_l3_parse_rxipe(const char *buf, enum qeth_prot_versions proto,
 		 u8 *addr)
 {
 	__be32 ipv4_addr;
 	struct in6_addr ipv6_addr;

 	if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
 		return -EINVAL;
 	}
 	if (proto == QETH_PROT_IPV4) {
 		memcpy(&ipv4_addr, addr, sizeof(ipv4_addr));
 		if (ipv4_is_multicast(ipv4_addr)) {
 			QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
 			return -EINVAL;
 		}
 	} else if (proto == QETH_PROT_IPV6) {
 		memcpy(&ipv6_addr, addr, sizeof(ipv6_addr));
 		if (ipv6_addr_is_multicast(&ipv6_addr)) {
 			QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
 			return -EINVAL;
 		}
 	}

 	return 0;
 }

 static ssize_t qeth_l3_rxip_store(struct device *dev, const char *buf, bool add,
 				  size_t count, enum qeth_prot_versions proto)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 	u8 addr[16] = {0, };
 	int rc;

 	rc = qeth_l3_parse_rxipe(buf, proto, addr);
 	if (!rc)
 		rc = qeth_l3_modify_rxip_vipa(card, add, addr,
 					      QETH_IP_TYPE_RXIP, proto);
 	return rc ? rc : count;
 }

 static ssize_t qeth_l3_dev_rxip_add4_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_rxip_store(dev, buf, true, count, QETH_PROT_IPV4);
 }

 static QETH_DEVICE_ATTR(rxip_add4, add4, 0644,
 			qeth_l3_dev_rxip_add4_show,
 			qeth_l3_dev_rxip_add4_store);

 static ssize_t qeth_l3_dev_rxip_del4_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_rxip_store(dev, buf, false, count, QETH_PROT_IPV4);
 }

 static QETH_DEVICE_ATTR(rxip_del4, del4, 0200, NULL,
 			qeth_l3_dev_rxip_del4_store);

 static ssize_t qeth_l3_dev_rxip_add6_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
 	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV6,
 				       QETH_IP_TYPE_RXIP);
 }

 static ssize_t qeth_l3_dev_rxip_add6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_rxip_store(dev, buf, true, count, QETH_PROT_IPV6);
 }

 static QETH_DEVICE_ATTR(rxip_add6, add6, 0644,
 			qeth_l3_dev_rxip_add6_show,
 			qeth_l3_dev_rxip_add6_store);

 static ssize_t qeth_l3_dev_rxip_del6_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	return qeth_l3_rxip_store(dev, buf, false, count, QETH_PROT_IPV6);
 }

 static QETH_DEVICE_ATTR(rxip_del6, del6, 0200, NULL,
 			qeth_l3_dev_rxip_del6_store);

 static struct attribute *qeth_rxip_device_attrs[] = {
 	&dev_attr_rxip_add4.attr,
 	&dev_attr_rxip_del4.attr,
 	&dev_attr_rxip_add6.attr,
 	&dev_attr_rxip_del6.attr,
 	NULL,
 };

 static const struct attribute_group qeth_device_rxip_group = {
 	.name = "rxip",
 	.attrs = qeth_rxip_device_attrs,
 };

 const struct attribute_group *qeth_l3_attr_groups[] = {
 	&qeth_l3_device_attr_group,
 	&qeth_device_ipato_group,
 	&qeth_device_vipa_group,
 	&qeth_device_rxip_group,
 	NULL,
 };
	// 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);

	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);

	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);

	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);

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

	return sprintf(buf, "%i\n", card->options.sniffer ? 1 : 0);
	}

	static ssize_t qeth_l3_dev_sniffer_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	int rc = 0;
	unsigned long i;

	if (!IS_IQD(card))
	return -EPERM;
	if (card->options.cq == QETH_CQ_ENABLED)
	return -EPERM;

	mutex_lock(&card->conf_mutex);
	if (card->state != CARD_STATE_DOWN) {
	rc = -EPERM;
	goto out;
	}

	rc = kstrtoul(buf, 16, &i);
	if (rc) {
	rc = -EINVAL;
	goto out;
	}
	switch (i) {
	case 0:
	card->options.sniffer = i;
	break;
	case 1:
	qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd);
	if (card->ssqd.qdioac2 & CHSC_AC2_SNIFFER_AVAILABLE) {
	card->options.sniffer = i;
	qeth_resize_buffer_pool(card, QETH_IN_BUF_COUNT_MAX);
	} else {
	rc = -EPERM;
	}

	break;
	default:
	rc = -EINVAL;
	}
	out:
	mutex_unlock(&card->conf_mutex);
	return rc ? rc : count;
	}

	static DEVICE_ATTR(sniffer, 0644, qeth_l3_dev_sniffer_show,
	qeth_l3_dev_sniffer_store);

	static ssize_t qeth_l3_dev_hsuid_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	char tmp_hsuid[9];

	if (!IS_IQD(card))
	return -EPERM;

	memcpy(tmp_hsuid, card->options.hsuid, sizeof(tmp_hsuid));
	EBCASC(tmp_hsuid, 8);
	return sprintf(buf, "%s\n", tmp_hsuid);
	}

	static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	int rc = 0;
	char *tmp;

	if (!IS_IQD(card))
	return -EPERM;

	mutex_lock(&card->conf_mutex);
	if (card->state != CARD_STATE_DOWN) {
	rc = -EPERM;
	goto out;
	}

	if (card->options.sniffer) {
	rc = -EPERM;
	goto out;
	}

	if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
	rc = -EPERM;
	goto out;
	}

	tmp = strsep((char **)&buf, "\n");
	if (strlen(tmp) > 8) {
	rc = -EINVAL;
	goto out;
	}

	if (card->options.hsuid[0])
	/* delete old ip address */
	qeth_l3_modify_hsuid(card, false);

	if (strlen(tmp) == 0) {
	/* delete ip address only */
	card->options.hsuid[0] = '\0';
	memcpy(card->dev->perm_addr, card->options.hsuid, 9);
	qeth_configure_cq(card, QETH_CQ_DISABLED);
	goto out;
	}

	if (qeth_configure_cq(card, QETH_CQ_ENABLED)) {
	rc = -EPERM;
	goto out;
	}

	snprintf(card->options.hsuid, sizeof(card->options.hsuid),
	"%-8s", tmp);
	ASCEBC(card->options.hsuid, 8);
	memcpy(card->dev->perm_addr, card->options.hsuid, 9);

	rc = qeth_l3_modify_hsuid(card, true);

	out:
	mutex_unlock(&card->conf_mutex);
	return rc ? rc : count;
	}

	static DEVICE_ATTR(hsuid, 0644, qeth_l3_dev_hsuid_show,
	qeth_l3_dev_hsuid_store);


	static struct attribute *qeth_l3_device_attrs[] = {
	&dev_attr_route4.attr,
	&dev_attr_route6.attr,
	&dev_attr_sniffer.attr,
	&dev_attr_hsuid.attr,
	NULL,
	};

	static const struct attribute_group qeth_l3_device_attr_group = {
	.attrs = qeth_l3_device_attrs,
	};

	static ssize_t qeth_l3_dev_ipato_enable_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return sprintf(buf, "%u\n", card->ipato.enabled ? 1 : 0);
	}

	static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	bool enable;
	int rc = 0;

	mutex_lock(&card->conf_mutex);
	if (card->state != CARD_STATE_DOWN) {
	rc = -EPERM;
	goto out;
	}

	mutex_lock(&card->ip_lock);
	if (sysfs_streq(buf, "toggle")) {
	enable = !card->ipato.enabled;
	} else if (kstrtobool(buf, &enable)) {
	rc = -EINVAL;
	goto unlock_ip;
	}

	if (card->ipato.enabled != enable) {
	card->ipato.enabled = enable;
	qeth_l3_update_ipato(card);
	}

	unlock_ip:
	mutex_unlock(&card->ip_lock);
	out:
	mutex_unlock(&card->conf_mutex);
	return rc ? rc : count;
	}

	static QETH_DEVICE_ATTR(ipato_enable, enable, 0644,
	qeth_l3_dev_ipato_enable_show,
	qeth_l3_dev_ipato_enable_store);

	static ssize_t qeth_l3_dev_ipato_invert4_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return sprintf(buf, "%u\n", card->ipato.invert4 ? 1 : 0);
	}

	static ssize_t qeth_l3_dev_ipato_invert4_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	bool invert;
	int rc = 0;

	mutex_lock(&card->ip_lock);
	if (sysfs_streq(buf, "toggle")) {
	invert = !card->ipato.invert4;
	} else if (kstrtobool(buf, &invert)) {
	rc = -EINVAL;
	goto out;
	}

	if (card->ipato.invert4 != invert) {
	card->ipato.invert4 = invert;
	qeth_l3_update_ipato(card);
	}

	out:
	mutex_unlock(&card->ip_lock);
	return rc ? rc : count;
	}

	static QETH_DEVICE_ATTR(ipato_invert4, invert4, 0644,
	qeth_l3_dev_ipato_invert4_show,
	qeth_l3_dev_ipato_invert4_store);

	static ssize_t qeth_l3_dev_ipato_add_show(char buf, struct qeth_card card,
	enum qeth_prot_versions proto)
	{
	struct qeth_ipato_entry *ipatoe;
	int str_len = 0;

	mutex_lock(&card->ip_lock);
	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
	char addr_str[40];
	int entry_len;

	if (ipatoe->proto != proto)
	continue;

	entry_len = qeth_l3_ipaddr_to_string(proto, ipatoe->addr,
	addr_str);
	if (entry_len < 0)
	continue;

	/* Append /%mask to the entry: */
	entry_len += 1 + ((proto == QETH_PROT_IPV4) ? 2 : 3);
	/* Enough room to format %entry\n into null terminated page? */
	if (entry_len + 1 > PAGE_SIZE - str_len - 1)
	break;

	entry_len = scnprintf(buf, PAGE_SIZE - str_len,
	"%s/%i\n", addr_str, ipatoe->mask_bits);
	str_len += entry_len;
	buf += entry_len;
	}
	mutex_unlock(&card->ip_lock);

	return str_len ? str_len : scnprintf(buf, PAGE_SIZE, "\n");
	}

	static ssize_t qeth_l3_dev_ipato_add4_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return qeth_l3_dev_ipato_add_show(buf, card, QETH_PROT_IPV4);
	}

	static int qeth_l3_parse_ipatoe(const char *buf, enum qeth_prot_versions proto,
	u8 addr, unsigned int mask_bits)
	{
	char *sep;
	int rc;

	/* Expected input pattern: %addr/%mask */
	sep = strnchr(buf, 40, '/');
	if (!sep)
	return -EINVAL;

	/* Terminate the %addr sub-string, and parse it: */
	*sep = '\0';
	rc = qeth_l3_string_to_ipaddr(buf, proto, addr);
	if (rc)
	return rc;

	rc = kstrtouint(sep + 1, 10, mask_bits);
	if (rc)
	return rc;

	if (*mask_bits > ((proto == QETH_PROT_IPV4) ? 32 : 128))
	return -EINVAL;

	return 0;
	}

	static ssize_t qeth_l3_dev_ipato_add_store(const char *buf, size_t count,
	struct qeth_card *card, enum qeth_prot_versions proto)
	{
	struct qeth_ipato_entry *ipatoe;
	unsigned int mask_bits;
	u8 addr[16];
	int rc = 0;

	rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
	if (rc)
	return rc;

	ipatoe = kzalloc(sizeof(struct qeth_ipato_entry), GFP_KERNEL);
	if (!ipatoe)
	return -ENOMEM;

	ipatoe->proto = proto;
	memcpy(ipatoe->addr, addr, (proto == QETH_PROT_IPV4) ? 4 : 16);
	ipatoe->mask_bits = mask_bits;

	rc = qeth_l3_add_ipato_entry(card, ipatoe);
	if (rc)
	kfree(ipatoe);

	return rc ? rc : count;
	}

	static ssize_t qeth_l3_dev_ipato_add4_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return qeth_l3_dev_ipato_add_store(buf, count, card, QETH_PROT_IPV4);
	}

	static QETH_DEVICE_ATTR(ipato_add4, add4, 0644,
	qeth_l3_dev_ipato_add4_show,
	qeth_l3_dev_ipato_add4_store);

	static ssize_t qeth_l3_dev_ipato_del_store(const char *buf, size_t count,
	struct qeth_card *card, enum qeth_prot_versions proto)
	{
	unsigned int mask_bits;
	u8 addr[16];
	int rc = 0;

	rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
	if (!rc)
	rc = qeth_l3_del_ipato_entry(card, proto, addr, mask_bits);
	return rc ? rc : count;
	}

	static ssize_t qeth_l3_dev_ipato_del4_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return qeth_l3_dev_ipato_del_store(buf, count, card, QETH_PROT_IPV4);
	}

	static QETH_DEVICE_ATTR(ipato_del4, del4, 0200, NULL,
	qeth_l3_dev_ipato_del4_store);

	static ssize_t qeth_l3_dev_ipato_invert6_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return sprintf(buf, "%u\n", card->ipato.invert6 ? 1 : 0);
	}

	static ssize_t qeth_l3_dev_ipato_invert6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	bool invert;
	int rc = 0;

	mutex_lock(&card->ip_lock);
	if (sysfs_streq(buf, "toggle")) {
	invert = !card->ipato.invert6;
	} else if (kstrtobool(buf, &invert)) {
	rc = -EINVAL;
	goto out;
	}

	if (card->ipato.invert6 != invert) {
	card->ipato.invert6 = invert;
	qeth_l3_update_ipato(card);
	}

	out:
	mutex_unlock(&card->ip_lock);
	return rc ? rc : count;
	}

	static QETH_DEVICE_ATTR(ipato_invert6, invert6, 0644,
	qeth_l3_dev_ipato_invert6_show,
	qeth_l3_dev_ipato_invert6_store);


	static ssize_t qeth_l3_dev_ipato_add6_show(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return qeth_l3_dev_ipato_add_show(buf, card, QETH_PROT_IPV6);
	}

	static ssize_t qeth_l3_dev_ipato_add6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return qeth_l3_dev_ipato_add_store(buf, count, card, QETH_PROT_IPV6);
	}

	static QETH_DEVICE_ATTR(ipato_add6, add6, 0644,
	qeth_l3_dev_ipato_add6_show,
	qeth_l3_dev_ipato_add6_store);

	static ssize_t qeth_l3_dev_ipato_del6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	struct qeth_card *card = dev_get_drvdata(dev);

	return qeth_l3_dev_ipato_del_store(buf, count, card, QETH_PROT_IPV6);
	}

	static QETH_DEVICE_ATTR(ipato_del6, del6, 0200, NULL,
	qeth_l3_dev_ipato_del6_store);

	static struct attribute *qeth_ipato_device_attrs[] = {
	&dev_attr_ipato_enable.attr,
	&dev_attr_ipato_invert4.attr,
	&dev_attr_ipato_add4.attr,
	&dev_attr_ipato_del4.attr,
	&dev_attr_ipato_invert6.attr,
	&dev_attr_ipato_add6.attr,
	&dev_attr_ipato_del6.attr,
	NULL,
	};

	static const struct attribute_group qeth_device_ipato_group = {
	.name = "ipa_takeover",
	.attrs = qeth_ipato_device_attrs,
	};

	static ssize_t qeth_l3_dev_ip_add_show(struct device dev, char buf,
	enum qeth_prot_versions proto,
	enum qeth_ip_types type)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	struct qeth_ipaddr *ipaddr;
	int str_len = 0;
	int i;

	mutex_lock(&card->ip_lock);
	hash_for_each(card->ip_htable, i, ipaddr, hnode) {
	char addr_str[40];
	int entry_len;

	if (ipaddr->proto != proto \|\| ipaddr->type != type)
	continue;

	entry_len = qeth_l3_ipaddr_to_string(proto, (u8 *)&ipaddr->u,
	addr_str);
	if (entry_len < 0)
	continue;

	/* Enough room to format %addr\n into null terminated page? */
	if (entry_len + 1 > PAGE_SIZE - str_len - 1)
	break;

	entry_len = scnprintf(buf, PAGE_SIZE - str_len, "%s\n",
	addr_str);
	str_len += entry_len;
	buf += entry_len;
	}
	mutex_unlock(&card->ip_lock);

	return str_len ? str_len : scnprintf(buf, PAGE_SIZE, "\n");
	}

	static ssize_t qeth_l3_dev_vipa_add4_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
	QETH_IP_TYPE_VIPA);
	}

	static ssize_t qeth_l3_vipa_store(struct device dev, const char buf, bool add,
	size_t count, enum qeth_prot_versions proto)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	u8 addr[16] = {0, };
	int rc;

	rc = qeth_l3_string_to_ipaddr(buf, proto, addr);
	if (!rc)
	rc = qeth_l3_modify_rxip_vipa(card, add, addr,
	QETH_IP_TYPE_VIPA, proto);
	return rc ? rc : count;
	}

	static ssize_t qeth_l3_dev_vipa_add4_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV4);
	}

	static QETH_DEVICE_ATTR(vipa_add4, add4, 0644,
	qeth_l3_dev_vipa_add4_show,
	qeth_l3_dev_vipa_add4_store);

	static ssize_t qeth_l3_dev_vipa_del4_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_vipa_store(dev, buf, false, count, QETH_PROT_IPV4);
	}

	static QETH_DEVICE_ATTR(vipa_del4, del4, 0200, NULL,
	qeth_l3_dev_vipa_del4_store);

	static ssize_t qeth_l3_dev_vipa_add6_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV6,
	QETH_IP_TYPE_VIPA);
	}

	static ssize_t qeth_l3_dev_vipa_add6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_vipa_store(dev, buf, true, count, QETH_PROT_IPV6);
	}

	static QETH_DEVICE_ATTR(vipa_add6, add6, 0644,
	qeth_l3_dev_vipa_add6_show,
	qeth_l3_dev_vipa_add6_store);

	static ssize_t qeth_l3_dev_vipa_del6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_vipa_store(dev, buf, false, count, QETH_PROT_IPV6);
	}

	static QETH_DEVICE_ATTR(vipa_del6, del6, 0200, NULL,
	qeth_l3_dev_vipa_del6_store);

	static struct attribute *qeth_vipa_device_attrs[] = {
	&dev_attr_vipa_add4.attr,
	&dev_attr_vipa_del4.attr,
	&dev_attr_vipa_add6.attr,
	&dev_attr_vipa_del6.attr,
	NULL,
	};

	static const struct attribute_group qeth_device_vipa_group = {
	.name = "vipa",
	.attrs = qeth_vipa_device_attrs,
	};

	static ssize_t qeth_l3_dev_rxip_add4_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
	QETH_IP_TYPE_RXIP);
	}

	static int qeth_l3_parse_rxipe(const char *buf, enum qeth_prot_versions proto,
	u8 *addr)
	{
	__be32 ipv4_addr;
	struct in6_addr ipv6_addr;

	if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
	return -EINVAL;
	}
	if (proto == QETH_PROT_IPV4) {
	memcpy(&ipv4_addr, addr, sizeof(ipv4_addr));
	if (ipv4_is_multicast(ipv4_addr)) {
	QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
	return -EINVAL;
	}
	} else if (proto == QETH_PROT_IPV6) {
	memcpy(&ipv6_addr, addr, sizeof(ipv6_addr));
	if (ipv6_addr_is_multicast(&ipv6_addr)) {
	QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
	return -EINVAL;
	}
	}

	return 0;
	}

	static ssize_t qeth_l3_rxip_store(struct device dev, const char buf, bool add,
	size_t count, enum qeth_prot_versions proto)
	{
	struct qeth_card *card = dev_get_drvdata(dev);
	u8 addr[16] = {0, };
	int rc;

	rc = qeth_l3_parse_rxipe(buf, proto, addr);
	if (!rc)
	rc = qeth_l3_modify_rxip_vipa(card, add, addr,
	QETH_IP_TYPE_RXIP, proto);
	return rc ? rc : count;
	}

	static ssize_t qeth_l3_dev_rxip_add4_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_rxip_store(dev, buf, true, count, QETH_PROT_IPV4);
	}

	static QETH_DEVICE_ATTR(rxip_add4, add4, 0644,
	qeth_l3_dev_rxip_add4_show,
	qeth_l3_dev_rxip_add4_store);

	static ssize_t qeth_l3_dev_rxip_del4_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_rxip_store(dev, buf, false, count, QETH_PROT_IPV4);
	}

	static QETH_DEVICE_ATTR(rxip_del4, del4, 0200, NULL,
	qeth_l3_dev_rxip_del4_store);

	static ssize_t qeth_l3_dev_rxip_add6_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV6,
	QETH_IP_TYPE_RXIP);
	}

	static ssize_t qeth_l3_dev_rxip_add6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_rxip_store(dev, buf, true, count, QETH_PROT_IPV6);
	}

	static QETH_DEVICE_ATTR(rxip_add6, add6, 0644,
	qeth_l3_dev_rxip_add6_show,
	qeth_l3_dev_rxip_add6_store);

	static ssize_t qeth_l3_dev_rxip_del6_store(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{
	return qeth_l3_rxip_store(dev, buf, false, count, QETH_PROT_IPV6);
	}

	static QETH_DEVICE_ATTR(rxip_del6, del6, 0200, NULL,
	qeth_l3_dev_rxip_del6_store);

	static struct attribute *qeth_rxip_device_attrs[] = {
	&dev_attr_rxip_add4.attr,
	&dev_attr_rxip_del4.attr,
	&dev_attr_rxip_add6.attr,
	&dev_attr_rxip_del6.attr,
	NULL,
	};

	static const struct attribute_group qeth_device_rxip_group = {
	.name = "rxip",
	.attrs = qeth_rxip_device_attrs,
	};

	const struct attribute_group *qeth_l3_attr_groups[] = {
	&qeth_l3_device_attr_group,
	&qeth_device_ipato_group,
	&qeth_device_vipa_group,
	&qeth_device_rxip_group,
	NULL,
	};