text: /*
   *  drivers/s390/net/qeth_l3_sys.c
   *
   *    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 "qeth_l3.h"
  
  #define QETH_DEVICE_ATTR(_id, _name, _mode, _show, _store) \
  struct device_attribute dev_attr_##_id = __ATTR(_name, _mode, _show, _store)
  
  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;
  	char *tmp;
  	int rc = 0;
  
  	tmp = strsep((char **) &buf, "\n");
  	mutex_lock(&card->conf_mutex);
  	if (!strcmp(tmp, "no_router")) {
  		route->type = NO_ROUTER;
  	} else if (!strcmp(tmp, "primary_connector")) {
  		route->type = PRIMARY_CONNECTOR;
  	} else if (!strcmp(tmp, "secondary_connector")) {
  		route->type = SECONDARY_CONNECTOR;
  	} else if (!strcmp(tmp, "primary_router")) {
  		route->type = PRIMARY_ROUTER;
  	} else if (!strcmp(tmp, "secondary_router")) {
  		route->type = SECONDARY_ROUTER;
  	} else if (!strcmp(tmp, "multicast_router")) {
  		route->type = MULTICAST_ROUTER;
  	} else {
  		rc = -EINVAL;
  		goto out;
  	}
  	if (((card->state == CARD_STATE_SOFTSETUP) ||
  	     (card->state == CARD_STATE_UP)) &&
  	    (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:
  	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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return sprintf(buf, "%i\n", card->options.fake_broadcast? 1:0);
  }
  
  static ssize_t qeth_l3_dev_fake_broadcast_store(struct device *dev,
  		struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  	char *tmp;
  	int i, rc = 0;
  
  	if (!card)
  		return -EINVAL;
  
  	mutex_lock(&card->conf_mutex);
  	if ((card->state != CARD_STATE_DOWN) &&
  	    (card->state != CARD_STATE_RECOVER)) {
  		rc = -EPERM;
  		goto out;
  	}
  
  	i = simple_strtoul(buf, &tmp, 16);
  	if ((i == 0) || (i == 1))
  		card->options.fake_broadcast = i;
  	else
  		rc = -EINVAL;
  out:
  	mutex_unlock(&card->conf_mutex);
  	return rc ? rc : count;
  }
  
  static DEVICE_ATTR(fake_broadcast, 0644, qeth_l3_dev_fake_broadcast_show,
  		   qeth_l3_dev_fake_broadcast_store);
  
  static ssize_t qeth_l3_dev_broadcast_mode_show(struct device *dev,
  				struct device_attribute *attr, char *buf)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	if (!((card->info.link_type == QETH_LINK_TYPE_HSTR) ||
  	      (card->info.link_type == QETH_LINK_TYPE_LANE_TR)))
  		return sprintf(buf, "n/a\n");
  
  	return sprintf(buf, "%s\n", (card->options.broadcast_mode ==
  				     QETH_TR_BROADCAST_ALLRINGS)?
  		       "all rings":"local");
  }
  
  static ssize_t qeth_l3_dev_broadcast_mode_store(struct device *dev,
  		struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  	char *tmp;
  	int rc = 0;
  
  	if (!card)
  		return -EINVAL;
  
  	mutex_lock(&card->conf_mutex);
  	if ((card->state != CARD_STATE_DOWN) &&
  	    (card->state != CARD_STATE_RECOVER)) {
  		rc = -EPERM;
  		goto out;
  	}
  
  	if (!((card->info.link_type == QETH_LINK_TYPE_HSTR) ||
  	      (card->info.link_type == QETH_LINK_TYPE_LANE_TR))) {
  		rc = -EINVAL;
  		goto out;
  	}
  
  	tmp = strsep((char **) &buf, "\n");
  
  	if (!strcmp(tmp, "local"))
  		card->options.broadcast_mode = QETH_TR_BROADCAST_LOCAL;
  	else if (!strcmp(tmp, "all_rings"))
  		card->options.broadcast_mode = QETH_TR_BROADCAST_ALLRINGS;
  	else
  		rc = -EINVAL;
  out:
  	mutex_unlock(&card->conf_mutex);
  	return rc ? rc : count;
  }
  
  static DEVICE_ATTR(broadcast_mode, 0644, qeth_l3_dev_broadcast_mode_show,
  		   qeth_l3_dev_broadcast_mode_store);
  
  static ssize_t qeth_l3_dev_canonical_macaddr_show(struct device *dev,
  				struct device_attribute *attr, char *buf)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	if (!((card->info.link_type == QETH_LINK_TYPE_HSTR) ||
  	      (card->info.link_type == QETH_LINK_TYPE_LANE_TR)))
  		return sprintf(buf, "n/a\n");
  
  	return sprintf(buf, "%i\n", (card->options.macaddr_mode ==
  				     QETH_TR_MACADDR_CANONICAL)? 1:0);
  }
  
  static ssize_t qeth_l3_dev_canonical_macaddr_store(struct device *dev,
  		struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  	char *tmp;
  	int i, rc = 0;
  
  	if (!card)
  		return -EINVAL;
  
  	mutex_lock(&card->conf_mutex);
  	if ((card->state != CARD_STATE_DOWN) &&
  	    (card->state != CARD_STATE_RECOVER)) {
  		rc = -EPERM;
  		goto out;
  	}
  
  	if (!((card->info.link_type == QETH_LINK_TYPE_HSTR) ||
  	      (card->info.link_type == QETH_LINK_TYPE_LANE_TR))) {
  		rc = -EINVAL;
  		goto out;
  	}
  
  	i = simple_strtoul(buf, &tmp, 16);
  	if ((i == 0) || (i == 1))
  		card->options.macaddr_mode = i?
  			QETH_TR_MACADDR_CANONICAL :
  			QETH_TR_MACADDR_NONCANONICAL;
  	else
  		rc = -EINVAL;
  out:
  	mutex_unlock(&card->conf_mutex);
  	return rc ? rc : count;
  }
  
  static DEVICE_ATTR(canonical_macaddr, 0644, qeth_l3_dev_canonical_macaddr_show,
  		   qeth_l3_dev_canonical_macaddr_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);
  
  	if (!card)
  		return -EINVAL;
  
  	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 (!card)
  		return -EINVAL;
  
  	if (card->info.type != QETH_CARD_TYPE_IQD)
  		return -EPERM;
  
  	mutex_lock(&card->conf_mutex);
  	if ((card->state != CARD_STATE_DOWN) &&
  	    (card->state != CARD_STATE_RECOVER)) {
  		rc = -EPERM;
  		goto out;
  	}
  
  	rc = strict_strtoul(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 & QETH_SNIFF_AVAIL) {
  			card->options.sniffer = i;
  			if (card->qdio.init_pool.buf_count !=
  					QETH_IN_BUF_COUNT_MAX)
  				qeth_realloc_buffer_pool(card,
  					QETH_IN_BUF_COUNT_MAX);
  			break;
  		} else
  			rc = -EPERM;
  	default:   /* fall through */
  		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 struct attribute *qeth_l3_device_attrs[] = {
  	&dev_attr_route4.attr,
  	&dev_attr_route6.attr,
  	&dev_attr_fake_broadcast.attr,
  	&dev_attr_broadcast_mode.attr,
  	&dev_attr_canonical_macaddr.attr,
  	&dev_attr_sniffer.attr,
  	NULL,
  };
  
  static 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);
  
  	if (!card)
  		return -EINVAL;
  
  	return sprintf(buf, "%i\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);
  	struct qeth_ipaddr *tmpipa, *t;
  	char *tmp;
  	int rc = 0;
  
  	if (!card)
  		return -EINVAL;
  
  	mutex_lock(&card->conf_mutex);
  	if ((card->state != CARD_STATE_DOWN) &&
  	    (card->state != CARD_STATE_RECOVER)) {
  		rc = -EPERM;
  		goto out;
  	}
  
  	tmp = strsep((char **) &buf, "\n");
  	if (!strcmp(tmp, "toggle")) {
  		card->ipato.enabled = (card->ipato.enabled)? 0 : 1;
  	} else if (!strcmp(tmp, "1")) {
  		card->ipato.enabled = 1;
  		list_for_each_entry_safe(tmpipa, t, card->ip_tbd_list, entry) {
  			if ((tmpipa->type == QETH_IP_TYPE_NORMAL) &&
  				qeth_l3_is_addr_covered_by_ipato(card, tmpipa))
  				tmpipa->set_flags |=
  					QETH_IPA_SETIP_TAKEOVER_FLAG;
  		}
  
  	} else if (!strcmp(tmp, "0")) {
  		card->ipato.enabled = 0;
  		list_for_each_entry_safe(tmpipa, t, card->ip_tbd_list, entry) {
  			if (tmpipa->set_flags &
  				QETH_IPA_SETIP_TAKEOVER_FLAG)
  				tmpipa->set_flags &=
  					~QETH_IPA_SETIP_TAKEOVER_FLAG;
  		}
  	} else
  		rc = -EINVAL;
  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);
  
  	if (!card)
  		return -EINVAL;
  
  	return sprintf(buf, "%i\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);
  	char *tmp;
  	int rc = 0;
  
  	if (!card)
  		return -EINVAL;
  
  	mutex_lock(&card->conf_mutex);
  	tmp = strsep((char **) &buf, "\n");
  	if (!strcmp(tmp, "toggle")) {
  		card->ipato.invert4 = (card->ipato.invert4)? 0 : 1;
  	} else if (!strcmp(tmp, "1")) {
  		card->ipato.invert4 = 1;
  	} else if (!strcmp(tmp, "0")) {
  		card->ipato.invert4 = 0;
  	} else
  		rc = -EINVAL;
  	mutex_unlock(&card->conf_mutex);
  	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;
  	unsigned long flags;
  	char addr_str[40];
  	int entry_len; /* length of 1 entry string, differs between v4 and v6 */
  	int i = 0;
  
  	entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
  	/* add strlen for "/<mask>\n" */
  	entry_len += (proto == QETH_PROT_IPV4)? 5 : 6;
  	spin_lock_irqsave(&card->ip_lock, flags);
  	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
  		if (ipatoe->proto != proto)
  			continue;
  		/* String must not be longer than PAGE_SIZE. So we check if
  		 * string length gets near PAGE_SIZE. Then we can savely display
  		 * the next IPv6 address (worst case, compared to IPv4) */
  		if ((PAGE_SIZE - i) <= entry_len)
  			break;
  		qeth_l3_ipaddr_to_string(proto, ipatoe->addr, addr_str);
  		i += snprintf(buf + i, PAGE_SIZE - i,
  			      "%s/%i\n", addr_str, ipatoe->mask_bits);
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	i += snprintf(buf + i, PAGE_SIZE - i, "\n");
  
  	return i;
  }
  
  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);
  
  	if (!card)
  		return -EINVAL;
  
  	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, int *mask_bits)
  {
  	const char *start, *end;
  	char *tmp;
  	char buffer[40] = {0, };
  
  	start = buf;
  	/* get address string */
  	end = strchr(start, '/');
  	if (!end || (end - start >= 40)) {
  		return -EINVAL;
  	}
  	strncpy(buffer, start, end - start);
  	if (qeth_l3_string_to_ipaddr(buffer, proto, addr)) {
  		return -EINVAL;
  	}
  	start = end + 1;
  	*mask_bits = simple_strtoul(start, &tmp, 10);
  	if (!strlen(start) ||
  	    (tmp == start) ||
  	    (*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;
  	u8 addr[16];
  	int mask_bits;
  	int rc = 0;
  
  	mutex_lock(&card->conf_mutex);
  	rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
  	if (rc)
  		goto out;
  
  	ipatoe = kzalloc(sizeof(struct qeth_ipato_entry), GFP_KERNEL);
  	if (!ipatoe) {
  		rc = -ENOMEM;
  		goto out;
  	}
  	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);
  out:
  	mutex_unlock(&card->conf_mutex);
  	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);
  
  	if (!card)
  		return -EINVAL;
  
  	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)
  {
  	u8 addr[16];
  	int mask_bits;
  	int rc = 0;
  
  	mutex_lock(&card->conf_mutex);
  	rc = qeth_l3_parse_ipatoe(buf, proto, addr, &mask_bits);
  	if (!rc)
  		qeth_l3_del_ipato_entry(card, proto, addr, mask_bits);
  	mutex_unlock(&card->conf_mutex);
  	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);
  
  	if (!card)
  		return -EINVAL;
  
  	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);
  
  	if (!card)
  		return -EINVAL;
  
  	return sprintf(buf, "%i\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);
  	char *tmp;
  	int rc = 0;
  
  	if (!card)
  		return -EINVAL;
  
  	mutex_lock(&card->conf_mutex);
  	tmp = strsep((char **) &buf, "\n");
  	if (!strcmp(tmp, "toggle")) {
  		card->ipato.invert6 = (card->ipato.invert6)? 0 : 1;
  	} else if (!strcmp(tmp, "1")) {
  		card->ipato.invert6 = 1;
  	} else if (!strcmp(tmp, "0")) {
  		card->ipato.invert6 = 0;
  	} else
  		rc = -EINVAL;
  	mutex_unlock(&card->conf_mutex);
  	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);
  
  	if (!card)
  		return -EINVAL;
  
  	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);
  
  	if (!card)
  		return -EINVAL;
  
  	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);
  
  	if (!card)
  		return -EINVAL;
  
  	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 struct attribute_group qeth_device_ipato_group = {
  	.name = "ipa_takeover",
  	.attrs = qeth_ipato_device_attrs,
  };
  
  static ssize_t qeth_l3_dev_vipa_add_show(char *buf, struct qeth_card *card,
  			enum qeth_prot_versions proto)
  {
  	struct qeth_ipaddr *ipaddr;
  	char addr_str[40];
  	int entry_len; /* length of 1 entry string, differs between v4 and v6 */
  	unsigned long flags;
  	int i = 0;
  
  	entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
  	entry_len += 2; /* \n + terminator */
  	spin_lock_irqsave(&card->ip_lock, flags);
  	list_for_each_entry(ipaddr, &card->ip_list, entry) {
  		if (ipaddr->proto != proto)
  			continue;
  		if (ipaddr->type != QETH_IP_TYPE_VIPA)
  			continue;
  		/* String must not be longer than PAGE_SIZE. So we check if
  		 * string length gets near PAGE_SIZE. Then we can savely display
  		 * the next IPv6 address (worst case, compared to IPv4) */
  		if ((PAGE_SIZE - i) <= entry_len)
  			break;
  		qeth_l3_ipaddr_to_string(proto, (const u8 *)&ipaddr->u,
  			addr_str);
  		i += snprintf(buf + i, PAGE_SIZE - i, "%s\n", addr_str);
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	i += snprintf(buf + i, PAGE_SIZE - i, "\n");
  
  	return i;
  }
  
  static ssize_t qeth_l3_dev_vipa_add4_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_vipa_add_show(buf, card, QETH_PROT_IPV4);
  }
  
  static int qeth_l3_parse_vipae(const char *buf, enum qeth_prot_versions proto,
  		 u8 *addr)
  {
  	if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
  		return -EINVAL;
  	}
  	return 0;
  }
  
  static ssize_t qeth_l3_dev_vipa_add_store(const char *buf, size_t count,
  			struct qeth_card *card, enum qeth_prot_versions proto)
  {
  	u8 addr[16] = {0, };
  	int rc;
  
  	mutex_lock(&card->conf_mutex);
  	rc = qeth_l3_parse_vipae(buf, proto, addr);
  	if (!rc)
  		rc = qeth_l3_add_vipa(card, proto, addr);
  	mutex_unlock(&card->conf_mutex);
  	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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return qeth_l3_dev_vipa_add_store(buf, count, card, 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_del_store(const char *buf, size_t count,
  			 struct qeth_card *card, enum qeth_prot_versions proto)
  {
  	u8 addr[16];
  	int rc;
  
  	mutex_lock(&card->conf_mutex);
  	rc = qeth_l3_parse_vipae(buf, proto, addr);
  	if (!rc)
  		qeth_l3_del_vipa(card, proto, addr);
  	mutex_unlock(&card->conf_mutex);
  	return rc ? rc : count;
  }
  
  static ssize_t qeth_l3_dev_vipa_del4_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_vipa_del_store(buf, count, card, 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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return qeth_l3_dev_vipa_add_show(buf, card, QETH_PROT_IPV6);
  }
  
  static ssize_t qeth_l3_dev_vipa_add6_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_vipa_add_store(buf, count, card, 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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return qeth_l3_dev_vipa_del_store(buf, count, card, 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 struct attribute_group qeth_device_vipa_group = {
  	.name = "vipa",
  	.attrs = qeth_vipa_device_attrs,
  };
  
  static ssize_t qeth_l3_dev_rxip_add_show(char *buf, struct qeth_card *card,
  		       enum qeth_prot_versions proto)
  {
  	struct qeth_ipaddr *ipaddr;
  	char addr_str[40];
  	int entry_len; /* length of 1 entry string, differs between v4 and v6 */
  	unsigned long flags;
  	int i = 0;
  
  	entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
  	entry_len += 2; /* \n + terminator */
  	spin_lock_irqsave(&card->ip_lock, flags);
  	list_for_each_entry(ipaddr, &card->ip_list, entry) {
  		if (ipaddr->proto != proto)
  			continue;
  		if (ipaddr->type != QETH_IP_TYPE_RXIP)
  			continue;
  		/* String must not be longer than PAGE_SIZE. So we check if
  		 * string length gets near PAGE_SIZE. Then we can savely display
  		 * the next IPv6 address (worst case, compared to IPv4) */
  		if ((PAGE_SIZE - i) <= entry_len)
  			break;
  		qeth_l3_ipaddr_to_string(proto, (const u8 *)&ipaddr->u,
  			addr_str);
  		i += snprintf(buf + i, PAGE_SIZE - i, "%s\n", addr_str);
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	i += snprintf(buf + i, PAGE_SIZE - i, "\n");
  
  	return i;
  }
  
  static ssize_t qeth_l3_dev_rxip_add4_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_rxip_add_show(buf, card, QETH_PROT_IPV4);
  }
  
  static int qeth_l3_parse_rxipe(const char *buf, enum qeth_prot_versions proto,
  		 u8 *addr)
  {
  	if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
  		return -EINVAL;
  	}
  	return 0;
  }
  
  static ssize_t qeth_l3_dev_rxip_add_store(const char *buf, size_t count,
  			struct qeth_card *card, enum qeth_prot_versions proto)
  {
  	u8 addr[16] = {0, };
  	int rc;
  
  	mutex_lock(&card->conf_mutex);
  	rc = qeth_l3_parse_rxipe(buf, proto, addr);
  	if (!rc)
  		rc = qeth_l3_add_rxip(card, proto, addr);
  	mutex_unlock(&card->conf_mutex);
  	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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return qeth_l3_dev_rxip_add_store(buf, count, card, 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_del_store(const char *buf, size_t count,
  			struct qeth_card *card, enum qeth_prot_versions proto)
  {
  	u8 addr[16];
  	int rc;
  
  	mutex_lock(&card->conf_mutex);
  	rc = qeth_l3_parse_rxipe(buf, proto, addr);
  	if (!rc)
  		qeth_l3_del_rxip(card, proto, addr);
  	mutex_unlock(&card->conf_mutex);
  	return rc ? rc : count;
  }
  
  static ssize_t qeth_l3_dev_rxip_del4_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_rxip_del_store(buf, count, card, 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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return qeth_l3_dev_rxip_add_show(buf, card, QETH_PROT_IPV6);
  }
  
  static ssize_t qeth_l3_dev_rxip_add6_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_rxip_add_store(buf, count, card, 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)
  {
  	struct qeth_card *card = dev_get_drvdata(dev);
  
  	if (!card)
  		return -EINVAL;
  
  	return qeth_l3_dev_rxip_del_store(buf, count, card, 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 struct attribute_group qeth_device_rxip_group = {
  	.name = "rxip",
  	.attrs = qeth_rxip_device_attrs,
  };
  
  int qeth_l3_create_device_attributes(struct device *dev)
  {
  	int ret;
  
  	ret = sysfs_create_group(&dev->kobj, &qeth_l3_device_attr_group);
  	if (ret)
  		return ret;
  
  	ret = sysfs_create_group(&dev->kobj, &qeth_device_ipato_group);
  	if (ret) {
  		sysfs_remove_group(&dev->kobj, &qeth_l3_device_attr_group);
  		return ret;
  	}
  
  	ret = sysfs_create_group(&dev->kobj, &qeth_device_vipa_group);
  	if (ret) {
  		sysfs_remove_group(&dev->kobj, &qeth_l3_device_attr_group);
  		sysfs_remove_group(&dev->kobj, &qeth_device_ipato_group);
  		return ret;
  	}
  
  	ret = sysfs_create_group(&dev->kobj, &qeth_device_rxip_group);
  	if (ret) {
  		sysfs_remove_group(&dev->kobj, &qeth_l3_device_attr_group);
  		sysfs_remove_group(&dev->kobj, &qeth_device_ipato_group);
  		sysfs_remove_group(&dev->kobj, &qeth_device_vipa_group);
  		return ret;
  	}
  	return 0;
  }
  
  void qeth_l3_remove_device_attributes(struct device *dev)
  {
  	sysfs_remove_group(&dev->kobj, &qeth_l3_device_attr_group);
  	sysfs_remove_group(&dev->kobj, &qeth_device_ipato_group);
  	sysfs_remove_group(&dev->kobj, &qeth_device_vipa_group);
  	sysfs_remove_group(&dev->kobj, &qeth_device_rxip_group);
  }
  