s390/qeth: use common helper to display rxip/vipa

By parameterising the address type, we need just one helper that walks
the IP table and builds up the response string.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index f8e74b384980a4c04f04a9997fe7379282d7442a..a645cfe66ddf724b22e9691467768d44bd620dc5 100644 (file)
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -705,22 +705,25 @@ static const struct attribute_group qeth_device_ipato_group = {
        .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)
+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;
        char addr_str[40];
        int str_len = 0;
        int entry_len; /* length of 1 entry string, differs between v4 and v6 */
        int i;
 
+       if (!card)
+               return -EINVAL;
+
        entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
        entry_len += 2; /* \n + terminator */
        spin_lock_bh(&card->ip_lock);
        hash_for_each(card->ip_htable, i, ipaddr, hnode) {
-               if (ipaddr->proto != proto)
-                       continue;
-               if (ipaddr->type != QETH_IP_TYPE_VIPA)
+               if (ipaddr->proto != proto || ipaddr->type != type)
                        continue;
                /* String must not be longer than PAGE_SIZE. So we check if
                 * string length gets near PAGE_SIZE. Then we can savely display
@@ -739,14 +742,11 @@ static ssize_t qeth_l3_dev_vipa_add_show(char *buf, struct qeth_card *card,
 }
 
 static ssize_t qeth_l3_dev_vipa_add4_show(struct device *dev,
-                       struct device_attribute *attr, char *buf)
+                                         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);
+       return qeth_l3_dev_ip_add_show(dev, buf, QETH_PROT_IPV4,
+                                      QETH_IP_TYPE_VIPA);
 }
 
 static int qeth_l3_parse_vipae(const char *buf, enum qeth_prot_versions proto,
@@ -816,14 +816,11 @@ 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 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);
+       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,
@@ -868,48 +865,12 @@ static const struct attribute_group qeth_device_vipa_group = {
        .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 str_len = 0;
-       int entry_len; /* length of 1 entry string, differs between v4 and v6 */
-       int i;
-
-       entry_len = (proto == QETH_PROT_IPV4)? 12 : 40;
-       entry_len += 2; /* \n + terminator */
-       spin_lock_bh(&card->ip_lock);
-       hash_for_each(card->ip_htable, i, ipaddr, hnode) {
-               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 - str_len) <= entry_len)
-                       break;
-               qeth_l3_ipaddr_to_string(proto, (const u8 *)&ipaddr->u,
-                       addr_str);
-               str_len += snprintf(buf + str_len, PAGE_SIZE - str_len, "%s\n",
-                                   addr_str);
-       }
-       spin_unlock_bh(&card->ip_lock);
-       str_len += snprintf(buf + str_len, PAGE_SIZE - str_len, "\n");
-
-       return str_len;
-}
-
 static ssize_t qeth_l3_dev_rxip_add4_show(struct device *dev,
-                       struct device_attribute *attr, char *buf)
+                                         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);
+       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,
@@ -996,14 +957,11 @@ 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 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);
+       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,