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fib: use indirect call wrappers in the most common fib_rules_ops 

This avoids another inderect call per RX packet which save us around
20-40 ns.

Changelog:

v1 -> v2:
- Move declaraions to fib_rules.h to remove warnings

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Brian Vazquez <brianvv@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Brian Vazquez 2020-07-26 15:48:16 -07:00 committed by David S. Miller
parent 608b4adab1
commit b9aaec8f0b
4 changed files with 47 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
include/net/fib_rules.h
View File

@ -10,6 +10,7 @@
#include <net/flow.h>
#include <net/rtnetlink.h>
#include <net/fib_notifier.h>
#include <linux/indirect_call_wrapper.h>
struct fib_kuid_range {
kuid_t start;
@ -203,4 +204,21 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack);
int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack);
INDIRECT_CALLABLE_DECLARE(int fib6_rule_match(struct fib_rule *rule,
struct flowi *fl, int flags));
INDIRECT_CALLABLE_DECLARE(int fib4_rule_match(struct fib_rule *rule,
struct flowi *fl, int flags));
INDIRECT_CALLABLE_DECLARE(int fib6_rule_action(struct fib_rule *rule,
struct flowi *flp, int flags,
struct fib_lookup_arg *arg));
INDIRECT_CALLABLE_DECLARE(int fib4_rule_action(struct fib_rule *rule,
struct flowi *flp, int flags,
struct fib_lookup_arg *arg));
INDIRECT_CALLABLE_DECLARE(bool fib6_rule_suppress(struct fib_rule *rule,
struct fib_lookup_arg *arg));
INDIRECT_CALLABLE_DECLARE(bool fib4_rule_suppress(struct fib_rule *rule,
struct fib_lookup_arg *arg));
#endif

16
net/core/fib_rules.c
View File

@ -14,6 +14,7 @@
#include <net/sock.h>
#include <net/fib_rules.h>
#include <net/ip_tunnels.h>
#include <linux/indirect_call_wrapper.h>
static const struct fib_kuid_range fib_kuid_range_unset = {
KUIDT_INIT(0),
@ -267,7 +268,10 @@ static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,
uid_gt(fl->flowi_uid, rule->uid_range.end))
goto out;
ret = ops->match(rule, fl, flags);
ret = INDIRECT_CALL_INET(ops->match,
fib6_rule_match,
fib4_rule_match,
rule, fl, flags);
out:
return (rule->flags & FIB_RULE_INVERT) ? !ret : ret;
}
@ -298,9 +302,15 @@ jumped:
} else if (rule->action == FR_ACT_NOP)
continue;
else
err = ops->action(rule, fl, flags, arg);
err = INDIRECT_CALL_INET(ops->action,
fib6_rule_action,
fib4_rule_action,
rule, fl, flags, arg);
if (!err && ops->suppress && ops->suppress(rule, arg))
if (!err && ops->suppress && INDIRECT_CALL_INET(ops->suppress,
fib6_rule_suppress,
fib4_rule_suppress,
rule, arg))
continue;
if (err != -EAGAIN) {

12
net/ipv4/fib_rules.c
View File

@ -29,6 +29,7 @@
#include <net/ip_fib.h>
#include <net/nexthop.h>
#include <net/fib_rules.h>
#include <linux/indirect_call_wrapper.h>
struct fib4_rule {
struct fib_rule common;
@ -103,8 +104,9 @@ int __fib_lookup(struct net *net, struct flowi4 *flp,
}
EXPORT_SYMBOL_GPL(__fib_lookup);
static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
int flags, struct fib_lookup_arg *arg)
INDIRECT_CALLABLE_SCOPE int fib4_rule_action(struct fib_rule *rule,
struct flowi *flp, int flags,
struct fib_lookup_arg *arg)
{
int err = -EAGAIN;
struct fib_table *tbl;
@ -138,7 +140,8 @@ static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
return err;
}
static bool fib4_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg)
INDIRECT_CALLABLE_SCOPE bool fib4_rule_suppress(struct fib_rule *rule,
struct fib_lookup_arg *arg)
{
struct fib_result *result = (struct fib_result *) arg->result;
struct net_device *dev = NULL;
@ -169,7 +172,8 @@ suppress_route:
return true;
}
static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
INDIRECT_CALLABLE_SCOPE int fib4_rule_match(struct fib_rule *rule,
struct flowi *fl, int flags)
{
struct fib4_rule *r = (struct fib4_rule *) rule;
struct flowi4 *fl4 = &fl->u.ip4;

12
net/ipv6/fib6_rules.c
View File

@ -13,6 +13,7 @@
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/export.h>
#include <linux/indirect_call_wrapper.h>
#include <net/fib_rules.h>
#include <net/ipv6.h>
@ -255,8 +256,9 @@ out:
return err;
}
static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
int flags, struct fib_lookup_arg *arg)
INDIRECT_CALLABLE_SCOPE int fib6_rule_action(struct fib_rule *rule,
struct flowi *flp, int flags,
struct fib_lookup_arg *arg)
{
if (arg->lookup_ptr == fib6_table_lookup)
return fib6_rule_action_alt(rule, flp, flags, arg);
@ -264,7 +266,8 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
return __fib6_rule_action(rule, flp, flags, arg);
}
static bool fib6_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg)
INDIRECT_CALLABLE_SCOPE bool fib6_rule_suppress(struct fib_rule *rule,
struct fib_lookup_arg *arg)
{
struct fib6_result *res = arg->result;
struct rt6_info *rt = res->rt6;
@ -296,7 +299,8 @@ suppress_route:
return true;
}
static int fib6_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
INDIRECT_CALLABLE_SCOPE int fib6_rule_match(struct fib_rule *rule,
struct flowi *fl, int flags)
{
struct fib6_rule *r = (struct fib6_rule *) rule;
struct flowi6 *fl6 = &fl->u.ip6;