From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: use common helper to display rxip/vipa
Patch-mainline: v4.16-rc1
Git-commit: d2073ef3402a67d5c96b758b0a4b94693f44e03f
References: FATE#326350, LTC#169511, bsc#1113509
Summary: qeth: performance improvements
Description: This adds recent functional and performance improvements for the
qeth network driver.
Primarily this brings Scatter-Gather support for HiperSockets,
reduced CPU consumption in the L3 IPv4 transmit path for OSA,
improved Promiscuous Mode performance due to IFF_UNICAST_FLT,
support for Scatter-Gather on z/VM virtual NICs, and
support for delayed GRO flushing.
For sanity & stability reasons, this effectively constitutes a
backport of the qeth device driver from 4.19 mainline.
Upstream-Description:
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>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/s390/net/qeth_l3_sys.c | 90 ++++++++++-------------------------------
1 file changed, 24 insertions(+), 66 deletions(-)
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -704,22 +704,25 @@ static const struct attribute_group qeth
.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
@@ -738,14 +741,11 @@ static ssize_t qeth_l3_dev_vipa_add_show
}
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,
@@ -815,14 +815,11 @@ static QETH_DEVICE_ATTR(vipa_del4, del4,
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,
@@ -867,48 +864,12 @@ static const struct attribute_group qeth
.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,
@@ -995,14 +956,11 @@ static QETH_DEVICE_ATTR(rxip_del4, del4,
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,