qeth_l3_sys.c

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/*
 *    Copyright IBM Corp. 2007
 *    Author(s): Utz Bacher <[email protected]>,
 *       Frank Pavlic <[email protected]>,
 *       Thomas Spatzier <[email protected]>,
 *       Frank Blaschka <[email protected]>
 */

#include <linux/slab.h>
#include <asm/ebcdic.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_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;
    if (card->options.cq == QETH_CQ_ENABLED)
        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);
        } 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 (!card)
        return -EINVAL;

    if (card->info.type != QETH_CARD_TYPE_IQD)
        return -EPERM;

    if (card->state == CARD_STATE_DOWN)
        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);
    struct qeth_ipaddr *addr;
    char *tmp;
    int i;

    if (!card)
        return -EINVAL;

    if (card->info.type != QETH_CARD_TYPE_IQD)
        return -EPERM;
    if (card->state != CARD_STATE_DOWN &&
        card->state != CARD_STATE_RECOVER)
        return -EPERM;
    if (card->options.sniffer)
        return -EPERM;
    if (card->options.cq == QETH_CQ_NOTAVAILABLE)
        return -EPERM;

    tmp = strsep((char **)&buf, "\n");
    if (strlen(tmp) > 8)
        return -EINVAL;

    if (card->options.hsuid[0]) {
        /* delete old ip address */
        addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
        if (addr != NULL) {
            addr->u.a6.addr.s6_addr32[0] = 0xfe800000;
            addr->u.a6.addr.s6_addr32[1] = 0x00000000;
            for (i = 8; i < 16; i++)
                addr->u.a6.addr.s6_addr[i] =
                    card->options.hsuid[i - 8];
            addr->u.a6.pfxlen = 0;
            addr->type = QETH_IP_TYPE_NORMAL;
        } else
            return -ENOMEM;
        if (!qeth_l3_delete_ip(card, addr))
            kfree(addr);
        qeth_l3_set_ip_addr_list(card);
    }

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

    if (qeth_configure_cq(card, QETH_CQ_ENABLED))
        return -EPERM;

    for (i = 0; i < 8; i++)
        card->options.hsuid[i] = ' ';
    card->options.hsuid[8] = '\0';
    strncpy(card->options.hsuid, tmp, strlen(tmp));
    ASCEBC(card->options.hsuid, 8);
    if (card->dev)
        memcpy(card->dev->perm_addr, card->options.hsuid, 9);

    addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
    if (addr != NULL) {
        addr->u.a6.addr.s6_addr32[0] = 0xfe800000;
        addr->u.a6.addr.s6_addr32[1] = 0x00000000;
        for (i = 8; i < 16; i++)
            addr->u.a6.addr.s6_addr[i] = card->options.hsuid[i - 8];
        addr->u.a6.pfxlen = 0;
        addr->type = QETH_IP_TYPE_NORMAL;
    } else
        return -ENOMEM;
    if (!qeth_l3_add_ip(card, addr))
        kfree(addr);
    qeth_l3_set_ip_addr_list(card);

    return 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_fake_broadcast.attr,
    &dev_attr_sniffer.attr,
    &dev_attr_hsuid.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);
}