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net: ipv6: use common fib_default_rule_pref 

This switches IPv6 policy routing to use the shared
fib_default_rule_pref() function of IPv4 and DECnet. It is also used in
multicast routing for IPv4 as well as IPv6.

The motivation for this patch is a complaint about iproute2 behaving
inconsistent between IPv4 and IPv6 when adding policy rules: Formerly,
IPv6 rules were assigned a fixed priority of 0x3FFF whereas for IPv4 the
assigned priority value was decreased with each rule added.

Since then all users of the default_pref field have been converted to
assign the generic function fib_default_rule_pref(), fib_nl_newrule()
may just use it directly instead. Therefore get rid of the function
pointer altogether and make fib_default_rule_pref() static, as it's not
used outside fib_rules.c anymore.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Phil Sutter 2015-09-09 14:20:56 +02:00 committed by David S. Miller
parent 444c5f92ed
commit f53de1e9a4
7 changed files with 3 additions and 19 deletions
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2
include/net/fib_rules.h
View File

@ -66,7 +66,6 @@ struct fib_rules_ops {
struct nlattr **);
int (*fill)(struct fib_rule *, struct sk_buff *,
struct fib_rule_hdr *);
u32 (*default_pref)(struct fib_rules_ops *ops);
size_t (*nlmsg_payload)(struct fib_rule *);
/* Called after modifications to the rules set, must flush
@ -118,5 +117,4 @@ int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
struct fib_lookup_arg *);
int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,
u32 flags);
u32 fib_default_rule_pref(struct fib_rules_ops *ops);
#endif

10
net/core/fib_rules.c
View File

@ -44,7 +44,7 @@ int fib_default_rule_add(struct fib_rules_ops *ops,
}
EXPORT_SYMBOL(fib_default_rule_add);
u32 fib_default_rule_pref(struct fib_rules_ops *ops)
static u32 fib_default_rule_pref(struct fib_rules_ops *ops)
{
struct list_head *pos;
struct fib_rule *rule;
@ -60,7 +60,6 @@ u32 fib_default_rule_pref(struct fib_rules_ops *ops)
return 0;
}
EXPORT_SYMBOL(fib_default_rule_pref);
static void notify_rule_change(int event, struct fib_rule *rule,
struct fib_rules_ops *ops, struct nlmsghdr *nlh,
@ -299,8 +298,8 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh)
}
rule->fr_net = net;
if (tb[FRA_PRIORITY])
rule->pref = nla_get_u32(tb[FRA_PRIORITY]);
rule->pref = tb[FRA_PRIORITY] ? nla_get_u32(tb[FRA_PRIORITY])
: fib_default_rule_pref(ops);
if (tb[FRA_IIFNAME]) {
struct net_device *dev;
@ -350,9 +349,6 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh)
else
rule->suppress_ifgroup = -1;
if (!tb[FRA_PRIORITY] && ops->default_pref)
rule->pref = ops->default_pref(ops);
err = -EINVAL;
if (tb[FRA_GOTO]) {
if (rule->action != FR_ACT_GOTO)

1
net/decnet/dn_rules.c
View File

@ -229,7 +229,6 @@ static const struct fib_rules_ops __net_initconst dn_fib_rules_ops_template = {
.configure = dn_fib_rule_configure,
.compare = dn_fib_rule_compare,
.fill = dn_fib_rule_fill,
.default_pref = fib_default_rule_pref,
.flush_cache = dn_fib_rule_flush_cache,
.nlgroup = RTNLGRP_DECnet_RULE,
.policy = dn_fib_rule_policy,

1
net/ipv4/fib_rules.c
View File

@ -318,7 +318,6 @@ static const struct fib_rules_ops __net_initconst fib4_rules_ops_template = {
.delete = fib4_rule_delete,
.compare = fib4_rule_compare,
.fill = fib4_rule_fill,
.default_pref = fib_default_rule_pref,
.nlmsg_payload = fib4_rule_nlmsg_payload,
.flush_cache = fib4_rule_flush_cache,
.nlgroup = RTNLGRP_IPV4_RULE,

1
net/ipv4/ipmr.c
View File

@ -233,7 +233,6 @@ static const struct fib_rules_ops __net_initconst ipmr_rules_ops_template = {
.match = ipmr_rule_match,
.configure = ipmr_rule_configure,
.compare = ipmr_rule_compare,
.default_pref = fib_default_rule_pref,
.fill = ipmr_rule_fill,
.nlgroup = RTNLGRP_IPV4_RULE,
.policy = ipmr_rule_policy,

6
net/ipv6/fib6_rules.c
View File

@ -258,11 +258,6 @@ nla_put_failure:
return -ENOBUFS;
}
static u32 fib6_rule_default_pref(struct fib_rules_ops *ops)
{
return 0x3FFF;
}
static size_t fib6_rule_nlmsg_payload(struct fib_rule *rule)
{
return nla_total_size(16) /* dst */
@ -279,7 +274,6 @@ static const struct fib_rules_ops __net_initconst fib6_rules_ops_template = {
.configure = fib6_rule_configure,
.compare = fib6_rule_compare,
.fill = fib6_rule_fill,
.default_pref = fib6_rule_default_pref,
.nlmsg_payload = fib6_rule_nlmsg_payload,
.nlgroup = RTNLGRP_IPV6_RULE,
.policy = fib6_rule_policy,

1
net/ipv6/ip6mr.c
View File

@ -217,7 +217,6 @@ static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = {
.match = ip6mr_rule_match,
.configure = ip6mr_rule_configure,
.compare = ip6mr_rule_compare,
.default_pref = fib_default_rule_pref,
.fill = ip6mr_rule_fill,
.nlgroup = RTNLGRP_IPV6_RULE,
.policy = ip6mr_rule_policy,