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Date: Thu, 14 Nov 2019 11:19:23 +0100
From: Julian Wiedmann <jwi@...ux.ibm.com>
To: David Miller <davem@...emloft.net>
Cc: <netdev@...r.kernel.org>, <linux-s390@...r.kernel.org>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Stefan Raspl <raspl@...ux.ibm.com>,
Ursula Braun <ubraun@...ux.ibm.com>,
Julian Wiedmann <jwi@...ux.ibm.com>
Subject: [PATCH net-next 10/11] s390/qeth: replace qeth_l3_get_addr_buffer()
The remaining usage effectively is a kmemdup() of the query object.
By not wrapping it, some of the callers can now use GFP_KERNEL for the
allocation.
Signed-off-by: Julian Wiedmann <jwi@...ux.ibm.com>
---
drivers/s390/net/qeth_l3.h | 1 +
drivers/s390/net/qeth_l3_main.c | 62 ++++++++++++---------------------
2 files changed, 23 insertions(+), 40 deletions(-)
diff --git a/drivers/s390/net/qeth_l3.h b/drivers/s390/net/qeth_l3.h
index ba913d1ab88d..2421f29021c1 100644
--- a/drivers/s390/net/qeth_l3.h
+++ b/drivers/s390/net/qeth_l3.h
@@ -54,6 +54,7 @@ static inline void qeth_l3_init_ipaddr(struct qeth_ipaddr *addr,
addr->type = type;
addr->proto = proto;
addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
+ addr->ref_counter = 1;
}
static inline bool qeth_l3_addr_match_ip(struct qeth_ipaddr *a1,
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index f4c65971321a..e7ce73b9f016 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -63,15 +63,6 @@ void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
qeth_l3_ipaddr6_to_string(addr, buf);
}
-static struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
-{
- struct qeth_ipaddr *addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
-
- if (addr)
- qeth_l3_init_ipaddr(addr, QETH_IP_TYPE_NORMAL, prot);
- return addr;
-}
-
static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
struct qeth_ipaddr *query)
{
@@ -216,13 +207,10 @@ static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
"Registering IP address %s failed\n", buf);
return -EADDRINUSE;
} else {
- addr = qeth_l3_get_addr_buffer(tmp_addr->proto);
+ addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
if (!addr)
return -ENOMEM;
- memcpy(addr, tmp_addr, sizeof(struct qeth_ipaddr));
- addr->ref_counter = 1;
-
if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
QETH_CARD_TEXT(card, 2, "tkovaddr");
addr->ipato = 1;
@@ -1115,11 +1103,11 @@ qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
{
- struct qeth_ipaddr *tmp = NULL;
struct qeth_card *card = arg;
struct inet6_dev *in6_dev;
struct in_device *in4_dev;
struct qeth_ipaddr *ipm;
+ struct qeth_ipaddr tmp;
struct ip_mc_list *im4;
struct ifmcaddr6 *im6;
@@ -1128,34 +1116,31 @@ static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
if (!dev || !(dev->flags & IFF_UP))
goto out;
- tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
- if (!tmp)
- goto out;
-
in4_dev = __in_dev_get_rtnl(dev);
if (!in4_dev)
goto walk_ipv6;
+ qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
+ tmp.disp_flag = QETH_DISP_ADDR_ADD;
+ tmp.is_multicast = 1;
+
for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
im4 = rtnl_dereference(im4->next_rcu)) {
- tmp->u.a4.addr = im4->multiaddr;
- tmp->is_multicast = 1;
+ tmp.u.a4.addr = im4->multiaddr;
- ipm = qeth_l3_find_addr_by_ip(card, tmp);
+ ipm = qeth_l3_find_addr_by_ip(card, &tmp);
if (ipm) {
/* for mcast, by-IP match means full match */
ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
- } else {
- ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
- if (!ipm)
- continue;
-
- ipm->u.a4.addr = im4->multiaddr;
- ipm->is_multicast = 1;
- ipm->disp_flag = QETH_DISP_ADDR_ADD;
- hash_add(card->ip_mc_htable,
- &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
+ continue;
}
+
+ ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
+ if (!ipm)
+ continue;
+
+ hash_add(card->ip_mc_htable, &ipm->hnode,
+ qeth_l3_ipaddr_hash(ipm));
}
walk_ipv6:
@@ -1166,27 +1151,25 @@ static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
if (!in6_dev)
goto out;
- qeth_l3_init_ipaddr(tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
+ qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
+ tmp.disp_flag = QETH_DISP_ADDR_ADD;
+ tmp.is_multicast = 1;
read_lock_bh(&in6_dev->lock);
for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
- tmp->u.a6.addr = im6->mca_addr;
- tmp->is_multicast = 1;
+ tmp.u.a6.addr = im6->mca_addr;
- ipm = qeth_l3_find_addr_by_ip(card, tmp);
+ ipm = qeth_l3_find_addr_by_ip(card, &tmp);
if (ipm) {
/* for mcast, by-IP match means full match */
ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
continue;
}
- ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
+ ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
if (!ipm)
continue;
- ipm->u.a6.addr = im6->mca_addr;
- ipm->is_multicast = 1;
- ipm->disp_flag = QETH_DISP_ADDR_ADD;
hash_add(card->ip_mc_htable,
&ipm->hnode, qeth_l3_ipaddr_hash(ipm));
@@ -1194,7 +1177,6 @@ static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
read_unlock_bh(&in6_dev->lock);
out:
- kfree(tmp);
return 0;
}
--
2.17.1
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