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net: rtnetlink: decouple rtnetlink address families from real address families

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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>
This commit is contained in:
Patrick McHardy 2010-04-26 16:02:05 +02:00
parent 3d0c9c4eb2
commit 25239cee7e
7 changed files with 17 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
include/linux/fib_rules.h
View file

@ -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;

6
include/linux/rtnetlink.h
View file

@ -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.
****/

14
net/core/rtnetlink.c
View file

@ -98,7 +98,7 @@ int lockdep_rtnl_is_held(void)
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 @@ static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
{
struct rtnl_link *tab;
if (protocol < NPROTO)
if (protocol <= RTNL_FAMILY_MAX)
tab = rtnl_msg_handlers[protocol];
else
tab = NULL;
@ -133,7 +133,7 @@ static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
{
struct rtnl_link *tab;
if (protocol < NPROTO)
if (protocol <= RTNL_FAMILY_MAX)
tab = rtnl_msg_handlers[protocol];
else
tab = NULL;
@ -167,7 +167,7 @@ int __rtnl_register(int protocol, int msgtype,
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 rtnl_unregister(int protocol, int msgtype)
{
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 @@ EXPORT_SYMBOL_GPL(rtnl_unregister);
*/
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 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
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;

2
net/decnet/dn_rules.c
View file

@ -217,7 +217,7 @@ static void dn_fib_rule_flush_cache(struct fib_rules_ops *ops)
}
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,

2
net/ipv4/fib_rules.c
View file

@ -246,7 +246,7 @@ static void fib4_rule_flush_cache(struct fib_rules_ops *ops)
}
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,

2
net/ipv4/ipmr.c
View file

@ -217,7 +217,7 @@ static int ipmr_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
}
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,

2
net/ipv6/fib6_rules.c
View file

@ -238,7 +238,7 @@ static size_t fib6_rule_nlmsg_payload(struct fib_rule *rule)
}
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,