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Date: Mon, 19 Aug 2013 18:14:30 +0800
From: Cong Wang <amwang@...hat.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Cong Wang <amwang@...hat.com>
Subject: [Patch net-next v3 1/9] net: introduce generic union inet_addr
From: Cong Wang <amwang@...hat.com>
Introduce a generic IP address type, union inet_addr, so that
subsystems don't have to use their own definitions. Because
netpoll already defines union inet_addr, just move it to global.
Some of the helper functions will be used by VXLAN IPv6 code too.
Signed-off-by: Cong Wang <amwang@...hat.com>
---
drivers/net/netconsole.c | 20 +++++++++------
include/linux/netpoll.h | 9 +------
include/net/inet_addr.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++
net/core/netpoll.c | 50 +++++++++++++++++++-----------------
4 files changed, 101 insertions(+), 40 deletions(-)
create mode 100644 include/net/inet_addr.h
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 4822aaf..e4eac0c 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -271,17 +271,17 @@ static ssize_t show_remote_port(struct netconsole_target *nt, char *buf)
static ssize_t show_local_ip(struct netconsole_target *nt, char *buf)
{
if (nt->np.ipv6)
- return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.local_ip.in6);
+ return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.local_ip.sin6.sin6_addr);
else
- return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.local_ip);
+ return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.local_ip.sin.sin_addr.s_addr);
}
static ssize_t show_remote_ip(struct netconsole_target *nt, char *buf)
{
if (nt->np.ipv6)
- return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.remote_ip.in6);
+ return snprintf(buf, PAGE_SIZE, "%pI6c\n", &nt->np.remote_ip.sin6.sin6_addr);
else
- return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.remote_ip);
+ return snprintf(buf, PAGE_SIZE, "%pI4\n", &nt->np.remote_ip.sin.sin_addr.s_addr);
}
static ssize_t show_local_mac(struct netconsole_target *nt, char *buf)
@@ -419,17 +419,19 @@ static ssize_t store_local_ip(struct netconsole_target *nt,
if (strnchr(buf, count, ':')) {
const char *end;
- if (in6_pton(buf, count, nt->np.local_ip.in6.s6_addr, -1, &end) > 0) {
+ if (in6_pton(buf, count, nt->np.local_ip.sin6.sin6_addr.s6_addr, -1, &end) > 0) {
if (*end && *end != '\n') {
printk(KERN_ERR "netconsole: invalid IPv6 address at: <%c>\n", *end);
return -EINVAL;
}
+ nt->np.local_ip.sa.sa_family = AF_INET6;
nt->np.ipv6 = true;
} else
return -EINVAL;
} else {
if (!nt->np.ipv6) {
- nt->np.local_ip.ip = in_aton(buf);
+ nt->np.local_ip.sin.sin_addr.s_addr = in_aton(buf);
+ nt->np.local_ip.sa.sa_family = AF_INET;
} else
return -EINVAL;
}
@@ -450,17 +452,19 @@ static ssize_t store_remote_ip(struct netconsole_target *nt,
if (strnchr(buf, count, ':')) {
const char *end;
- if (in6_pton(buf, count, nt->np.remote_ip.in6.s6_addr, -1, &end) > 0) {
+ if (in6_pton(buf, count, nt->np.remote_ip.sin6.sin6_addr.s6_addr, -1, &end) > 0) {
if (*end && *end != '\n') {
printk(KERN_ERR "netconsole: invalid IPv6 address at: <%c>\n", *end);
return -EINVAL;
}
+ nt->np.remote_ip.sa.sa_family = AF_INET6;
nt->np.ipv6 = true;
} else
return -EINVAL;
} else {
if (!nt->np.ipv6) {
- nt->np.remote_ip.ip = in_aton(buf);
+ nt->np.remote_ip.sin.sin_addr.s_addr = in_aton(buf);
+ nt->np.remote_ip.sa.sa_family = AF_INET;
} else
return -EINVAL;
}
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index f3c7c24..3884834 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -11,14 +11,7 @@
#include <linux/interrupt.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
-
-union inet_addr {
- __u32 all[4];
- __be32 ip;
- __be32 ip6[4];
- struct in_addr in;
- struct in6_addr in6;
-};
+#include <net/inet_addr.h>
struct netpoll {
struct net_device *dev;
diff --git a/include/net/inet_addr.h b/include/net/inet_addr.h
new file mode 100644
index 0000000..66a16fe
--- /dev/null
+++ b/include/net/inet_addr.h
@@ -0,0 +1,62 @@
+#ifndef _INET_ADDR_H
+#define _INET_ADDR_H
+
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/socket.h>
+#include <net/addrconf.h>
+
+union inet_addr {
+ struct sockaddr_in sin;
+ struct sockaddr_in6 sin6;
+ struct sockaddr sa;
+};
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline
+bool inet_addr_equal(const union inet_addr *a, const union inet_addr *b)
+{
+ if (a->sa.sa_family != b->sa.sa_family)
+ return false;
+ if (a->sa.sa_family == AF_INET6)
+ return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
+ else
+ return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
+}
+
+static inline bool inet_addr_any(const union inet_addr *ipa)
+{
+ if (ipa->sa.sa_family == AF_INET6)
+ return ipv6_addr_any(&ipa->sin6.sin6_addr);
+ else
+ return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
+}
+
+static inline bool inet_addr_multicast(const union inet_addr *ipa)
+{
+ if (ipa->sa.sa_family == AF_INET6)
+ return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr);
+ else
+ return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
+}
+
+#else /* !CONFIG_IPV6 */
+
+static inline
+bool inet_addr_equal(const union inet_addr *a, const union inet_addr *b)
+{
+ return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
+}
+
+static inline bool inet_addr_any(const union inet_addr *ipa)
+{
+ return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
+}
+
+static inline bool inet_addr_multicast(const union inet_addr *ipa)
+{
+ return IN_MULTICAST(ntohl(ipa->sin.sin_addr.s_addr));
+}
+#endif
+
+#endif
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 2c637e9..dd38553 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -456,8 +456,8 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
if (np->ipv6) {
udph->check = 0;
- udph->check = csum_ipv6_magic(&np->local_ip.in6,
- &np->remote_ip.in6,
+ udph->check = csum_ipv6_magic(&np->local_ip.sin6.sin6_addr,
+ &np->remote_ip.sin6.sin6_addr,
udp_len, IPPROTO_UDP,
csum_partial(udph, udp_len, 0));
if (udph->check == 0)
@@ -476,16 +476,16 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
ip6h->payload_len = htons(sizeof(struct udphdr) + len);
ip6h->nexthdr = IPPROTO_UDP;
ip6h->hop_limit = 32;
- ip6h->saddr = np->local_ip.in6;
- ip6h->daddr = np->remote_ip.in6;
+ ip6h->saddr = np->local_ip.sin6.sin6_addr;
+ ip6h->daddr = np->remote_ip.sin6.sin6_addr;
eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
skb_reset_mac_header(skb);
skb->protocol = eth->h_proto = htons(ETH_P_IPV6);
} else {
udph->check = 0;
- udph->check = csum_tcpudp_magic(np->local_ip.ip,
- np->remote_ip.ip,
+ udph->check = csum_tcpudp_magic(np->local_ip.sin.sin_addr.s_addr,
+ np->remote_ip.sin.sin_addr.s_addr,
udp_len, IPPROTO_UDP,
csum_partial(udph, udp_len, 0));
if (udph->check == 0)
@@ -504,8 +504,8 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
iph->ttl = 64;
iph->protocol = IPPROTO_UDP;
iph->check = 0;
- put_unaligned(np->local_ip.ip, &(iph->saddr));
- put_unaligned(np->remote_ip.ip, &(iph->daddr));
+ put_unaligned(np->local_ip.sin.sin_addr.s_addr, &(iph->saddr));
+ put_unaligned(np->remote_ip.sin.sin_addr.s_addr, &(iph->daddr));
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
@@ -589,7 +589,7 @@ static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo
spin_lock_irqsave(&npinfo->rx_lock, flags);
list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
- if (tip != np->local_ip.ip)
+ if (tip != np->local_ip.sin.sin_addr.s_addr)
continue;
hlen = LL_RESERVED_SPACE(np->dev);
@@ -677,7 +677,7 @@ static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo
spin_lock_irqsave(&npinfo->rx_lock, flags);
list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
- if (!ipv6_addr_equal(daddr, &np->local_ip.in6))
+ if (!ipv6_addr_equal(daddr, &np->local_ip.sin6.sin6_addr))
continue;
hlen = LL_RESERVED_SPACE(np->dev);
@@ -827,9 +827,11 @@ int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo)
if (checksum_udp(skb, uh, ulen, iph->saddr, iph->daddr))
goto out;
list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
- if (np->local_ip.ip && np->local_ip.ip != iph->daddr)
+ __be32 daddr = np->local_ip.sin.sin_addr.s_addr;
+ __be32 saddr = np->remote_ip.sin.sin_addr.s_addr;
+ if (daddr && daddr != iph->daddr)
continue;
- if (np->remote_ip.ip && np->remote_ip.ip != iph->saddr)
+ if (saddr && saddr != iph->saddr)
continue;
if (np->local_port && np->local_port != ntohs(uh->dest))
continue;
@@ -865,9 +867,9 @@ int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo)
if (udp6_csum_init(skb, uh, IPPROTO_UDP))
goto out;
list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
- if (!ipv6_addr_equal(&np->local_ip.in6, &ip6h->daddr))
+ if (!ipv6_addr_equal(&np->local_ip.sin6.sin6_addr, &ip6h->daddr))
continue;
- if (!ipv6_addr_equal(&np->remote_ip.in6, &ip6h->saddr))
+ if (!ipv6_addr_equal(&np->remote_ip.sin6.sin6_addr, &ip6h->saddr))
continue;
if (np->local_port && np->local_port != ntohs(uh->dest))
continue;
@@ -899,15 +901,15 @@ void netpoll_print_options(struct netpoll *np)
{
np_info(np, "local port %d\n", np->local_port);
if (np->ipv6)
- np_info(np, "local IPv6 address %pI6c\n", &np->local_ip.in6);
+ np_info(np, "local IPv6 address %pI6c\n", &np->local_ip.sin6.sin6_addr);
else
- np_info(np, "local IPv4 address %pI4\n", &np->local_ip.ip);
+ np_info(np, "local IPv4 address %pI4\n", &np->local_ip.sin.sin_addr.s_addr);
np_info(np, "interface '%s'\n", np->dev_name);
np_info(np, "remote port %d\n", np->remote_port);
if (np->ipv6)
- np_info(np, "remote IPv6 address %pI6c\n", &np->remote_ip.in6);
+ np_info(np, "remote IPv6 address %pI6c\n", &np->remote_ip.sin6.sin6_addr);
else
- np_info(np, "remote IPv4 address %pI4\n", &np->remote_ip.ip);
+ np_info(np, "remote IPv4 address %pI4\n", &np->remote_ip.sin.sin_addr.s_addr);
np_info(np, "remote ethernet address %pM\n", np->remote_mac);
}
EXPORT_SYMBOL(netpoll_print_options);
@@ -921,7 +923,7 @@ static int netpoll_parse_ip_addr(const char *str, union inet_addr *addr)
if (!*end)
return 0;
}
- if (in6_pton(str, -1, addr->in6.s6_addr, -1, &end) > 0) {
+ if (in6_pton(str, -1, addr->sin6.sin6_addr.s6_addr, -1, &end) > 0) {
#if IS_ENABLED(CONFIG_IPV6)
if (!*end)
return 1;
@@ -1140,7 +1142,7 @@ int netpoll_setup(struct netpoll *np)
rtnl_lock();
}
- if (!np->local_ip.ip) {
+ if (!np->local_ip.sin.sin_addr.s_addr) {
if (!np->ipv6) {
in_dev = __in_dev_get_rtnl(ndev);
@@ -1151,8 +1153,8 @@ int netpoll_setup(struct netpoll *np)
goto put;
}
- np->local_ip.ip = in_dev->ifa_list->ifa_local;
- np_info(np, "local IP %pI4\n", &np->local_ip.ip);
+ np->local_ip.sin.sin_addr.s_addr = in_dev->ifa_list->ifa_local;
+ np_info(np, "local IP %pI4\n", &np->local_ip.sin.sin_addr.s_addr);
} else {
#if IS_ENABLED(CONFIG_IPV6)
struct inet6_dev *idev;
@@ -1166,7 +1168,7 @@ int netpoll_setup(struct netpoll *np)
list_for_each_entry(ifp, &idev->addr_list, if_list) {
if (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)
continue;
- np->local_ip.in6 = ifp->addr;
+ np->local_ip.sin6.sin6_addr = ifp->addr;
err = 0;
break;
}
@@ -1177,7 +1179,7 @@ int netpoll_setup(struct netpoll *np)
np->dev_name);
goto put;
} else
- np_info(np, "local IPv6 %pI6c\n", &np->local_ip.in6);
+ np_info(np, "local IPv6 %pI6c\n", &np->local_ip.sin6.sin6_addr);
#else
np_err(np, "IPv6 is not supported %s, aborting\n",
np->dev_name);
--
1.7.7.6
--
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