net: rtnetlink: decouple rtnetlink address families from real address families
Decouple rtnetlink address families from real address families in socket.h to
be able to add rtnetlink interfaces to code that is not a real address family
without increasing AF_MAX/NPROTO.
This will be used to add support for multicast route dumping from all tables
as the proc interface can't be extended to support anything but the main table
without breaking compatibility.
This partialy undoes the patch to introduce independant families for routing
rules and converts ipmr routing rules to a new rtnetlink family. Similar to
that patch, values up to 127 are reserved for real address families, values
above that may be used arbitrarily.
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/linux/fib_rules.h b/include/linux/fib_rules.h
index 04a3976..51da65b 100644
--- a/include/linux/fib_rules.h
+++ b/include/linux/fib_rules.h
@@ -15,14 +15,6 @@
/* try to find source address in routing lookups */
#define FIB_RULE_FIND_SADDR 0x00010000
-/* fib_rules families. values up to 127 are reserved for real address
- * families, values above 128 may be used arbitrarily.
- */
-#define FIB_RULES_IPV4 AF_INET
-#define FIB_RULES_IPV6 AF_INET6
-#define FIB_RULES_DECNET AF_DECnet
-#define FIB_RULES_IPMR 128
-
struct fib_rule_hdr {
__u8 family;
__u8 dst_len;
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index d1c7c90..5a42c36 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -7,6 +7,12 @@
#include <linux/if_addr.h>
#include <linux/neighbour.h>
+/* rtnetlink families. Values up to 127 are reserved for real address
+ * families, values above 128 may be used arbitrarily.
+ */
+#define RTNL_FAMILY_IPMR 128
+#define RTNL_FAMILY_MAX 128
+
/****
* Routing/neighbour discovery messages.
****/
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 78c85985c..fd781b6 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -98,7 +98,7 @@
EXPORT_SYMBOL(lockdep_rtnl_is_held);
#endif /* #ifdef CONFIG_PROVE_LOCKING */
-static struct rtnl_link *rtnl_msg_handlers[NPROTO];
+static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
static inline int rtm_msgindex(int msgtype)
{
@@ -118,7 +118,7 @@
{
struct rtnl_link *tab;
- if (protocol < NPROTO)
+ if (protocol <= RTNL_FAMILY_MAX)
tab = rtnl_msg_handlers[protocol];
else
tab = NULL;
@@ -133,7 +133,7 @@
{
struct rtnl_link *tab;
- if (protocol < NPROTO)
+ if (protocol <= RTNL_FAMILY_MAX)
tab = rtnl_msg_handlers[protocol];
else
tab = NULL;
@@ -167,7 +167,7 @@
struct rtnl_link *tab;
int msgindex;
- BUG_ON(protocol < 0 || protocol >= NPROTO);
+ BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
msgindex = rtm_msgindex(msgtype);
tab = rtnl_msg_handlers[protocol];
@@ -219,7 +219,7 @@
{
int msgindex;
- BUG_ON(protocol < 0 || protocol >= NPROTO);
+ BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
msgindex = rtm_msgindex(msgtype);
if (rtnl_msg_handlers[protocol] == NULL)
@@ -241,7 +241,7 @@
*/
void rtnl_unregister_all(int protocol)
{
- BUG_ON(protocol < 0 || protocol >= NPROTO);
+ BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
kfree(rtnl_msg_handlers[protocol]);
rtnl_msg_handlers[protocol] = NULL;
@@ -1384,7 +1384,7 @@
if (s_idx == 0)
s_idx = 1;
- for (idx = 1; idx < NPROTO; idx++) {
+ for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
int type = cb->nlh->nlmsg_type-RTM_BASE;
if (idx < s_idx || idx == PF_PACKET)
continue;
diff --git a/net/decnet/dn_rules.c b/net/decnet/dn_rules.c
index 1226bca..48fdf10 100644
--- a/net/decnet/dn_rules.c
+++ b/net/decnet/dn_rules.c
@@ -217,7 +217,7 @@
}
static const struct fib_rules_ops __net_initdata dn_fib_rules_ops_template = {
- .family = FIB_RULES_DECNET,
+ .family = AF_DECnet,
.rule_size = sizeof(struct dn_fib_rule),
.addr_size = sizeof(u16),
.action = dn_fib_rule_action,
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 8ab62a5..76daeb5 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -246,7 +246,7 @@
}
static const struct fib_rules_ops __net_initdata fib4_rules_ops_template = {
- .family = FIB_RULES_IPV4,
+ .family = AF_INET,
.rule_size = sizeof(struct fib4_rule),
.addr_size = sizeof(u32),
.action = fib4_rule_action,
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 7d3e382..41e8fc0 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -217,7 +217,7 @@
}
static const struct fib_rules_ops __net_initdata ipmr_rules_ops_template = {
- .family = FIB_RULES_IPMR,
+ .family = RTNL_FAMILY_IPMR,
.rule_size = sizeof(struct ipmr_rule),
.addr_size = sizeof(u32),
.action = ipmr_rule_action,
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 35f6949..8e44f8f 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -238,7 +238,7 @@
}
static const struct fib_rules_ops __net_initdata fib6_rules_ops_template = {
- .family = FIB_RULES_IPV6,
+ .family = AF_INET6,
.rule_size = sizeof(struct fib6_rule),
.addr_size = sizeof(struct in6_addr),
.action = fib6_rule_action,
