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[NET]: Rethink mark field in struct flowi

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Now that all protocols have been made aware of the mark
field it can be moved out of the union thus simplyfing
its usage.

The config options in the IPv4/IPv6/DECnet subsystems
to enable respectively disable mark based routing only
obfuscate the code with ifdefs, the cost for the
additional comparison in the flow key is insignificant,
and most distributions have all these options enabled
by default anyway. Therefore it makes sense to remove
the config options and enable mark based routing by
default.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2006-11-09 15:20:38 -08:00 committed by David S. Miller
parent 82e91ffef6
commit 47dcf0cb10
14 changed files with 26 additions and 121 deletions
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7
include/net/flow.h
View File

@ -13,12 +13,12 @@
struct flowi {
int oif;
int iif;
__u32 mark;
union {
struct {
__be32 daddr;
__be32 saddr;
__u32 fwmark;
__u8 tos;
__u8 scope;
} ip4_u;
@ -26,28 +26,23 @@ struct flowi {
struct {
struct in6_addr daddr;
struct in6_addr saddr;
__u32 fwmark;
__be32 flowlabel;
} ip6_u;
struct {
__le16 daddr;
__le16 saddr;
__u32 fwmark;
__u8 scope;
} dn_u;
} nl_u;
#define fld_dst nl_u.dn_u.daddr
#define fld_src nl_u.dn_u.saddr
#define fld_fwmark nl_u.dn_u.fwmark
#define fld_scope nl_u.dn_u.scope
#define fl6_dst nl_u.ip6_u.daddr
#define fl6_src nl_u.ip6_u.saddr
#define fl6_fwmark nl_u.ip6_u.fwmark
#define fl6_flowlabel nl_u.ip6_u.flowlabel
#define fl4_dst nl_u.ip4_u.daddr
#define fl4_src nl_u.ip4_u.saddr
#define fl4_fwmark nl_u.ip4_u.fwmark
#define fl4_tos nl_u.ip4_u.tos
#define fl4_scope nl_u.ip4_u.scope

4
include/net/ip_mp_alg.h
View File

@ -88,9 +88,7 @@ static inline int multipath_comparekeys(const struct flowi *flp1,
return flp1->fl4_dst == flp2->fl4_dst &&
flp1->fl4_src == flp2->fl4_src &&
flp1->oif == flp2->oif &&
#ifdef CONFIG_IP_ROUTE_FWMARK
flp1->fl4_fwmark == flp2->fl4_fwmark &&
#endif
flp1->mark == flp2->mark &&
!((flp1->fl4_tos ^ flp2->fl4_tos) &
(IPTOS_RT_MASK | RTO_ONLINK));
}

8
net/decnet/Kconfig
View File

@ -41,11 +41,3 @@ config DECNET_ROUTER
See <file:Documentation/networking/decnet.txt> for more information.
config DECNET_ROUTE_FWMARK
bool "DECnet: use FWMARK value as routing key (EXPERIMENTAL)"
depends on DECNET_ROUTER && NETFILTER
help
If you say Y here, you will be able to specify different routes for
packets with different FWMARK ("firewalling mark") values
(see ipchains(8), "-m" argument).

28
net/decnet/dn_route.c
View File

@ -269,9 +269,7 @@ static inline int compare_keys(struct flowi *fl1, struct flowi *fl2)
{
return ((fl1->nl_u.dn_u.daddr ^ fl2->nl_u.dn_u.daddr) |
(fl1->nl_u.dn_u.saddr ^ fl2->nl_u.dn_u.saddr) |
#ifdef CONFIG_DECNET_ROUTE_FWMARK
(fl1->nl_u.dn_u.fwmark ^ fl2->nl_u.dn_u.fwmark) |
#endif
(fl1->mark ^ fl2->mark) |
(fl1->nl_u.dn_u.scope ^ fl2->nl_u.dn_u.scope) |
(fl1->oif ^ fl2->oif) |
(fl1->iif ^ fl2->iif)) == 0;
@ -882,10 +880,8 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowi *old
{ .daddr = oldflp->fld_dst,
.saddr = oldflp->fld_src,
.scope = RT_SCOPE_UNIVERSE,
#ifdef CONFIG_DECNET_ROUTE_FWMARK
.fwmark = oldflp->fld_fwmark
#endif
} },
.mark = oldflp->mark,
.iif = loopback_dev.ifindex,
.oif = oldflp->oif };
struct dn_route *rt = NULL;
@ -903,7 +899,7 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowi *old
"dn_route_output_slow: dst=%04x src=%04x mark=%d"
" iif=%d oif=%d\n", dn_ntohs(oldflp->fld_dst),
dn_ntohs(oldflp->fld_src),
oldflp->fld_fwmark, loopback_dev.ifindex, oldflp->oif);
oldflp->mark, loopback_dev.ifindex, oldflp->oif);
/* If we have an output interface, verify its a DECnet device */
if (oldflp->oif) {
@ -1108,9 +1104,7 @@ static int dn_route_output_slow(struct dst_entry **pprt, const struct flowi *old
rt->fl.fld_dst = oldflp->fld_dst;
rt->fl.oif = oldflp->oif;
rt->fl.iif = 0;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
rt->fl.fld_fwmark = oldflp->fld_fwmark;
#endif
rt->fl.mark = oldflp->mark;
rt->rt_saddr = fl.fld_src;
rt->rt_daddr = fl.fld_dst;
@ -1178,9 +1172,7 @@ static int __dn_route_output_key(struct dst_entry **pprt, const struct flowi *fl
rt = rcu_dereference(rt->u.rt_next)) {
if ((flp->fld_dst == rt->fl.fld_dst) &&
(flp->fld_src == rt->fl.fld_src) &&
#ifdef CONFIG_DECNET_ROUTE_FWMARK
(flp->fld_fwmark == rt->fl.fld_fwmark) &&
#endif
(flp->mark == rt->fl.mark) &&
(rt->fl.iif == 0) &&
(rt->fl.oif == flp->oif)) {
rt->u.dst.lastuse = jiffies;
@ -1235,10 +1227,8 @@ static int dn_route_input_slow(struct sk_buff *skb)
{ .daddr = cb->dst,
.saddr = cb->src,
.scope = RT_SCOPE_UNIVERSE,
#ifdef CONFIG_DECNET_ROUTE_FWMARK
.fwmark = skb->mark
#endif
} },
.mark = skb->mark,
.iif = skb->dev->ifindex };
struct dn_fib_res res = { .fi = NULL, .type = RTN_UNREACHABLE };
int err = -EINVAL;
@ -1385,7 +1375,7 @@ static int dn_route_input_slow(struct sk_buff *skb)
rt->fl.fld_dst = cb->dst;
rt->fl.oif = 0;
rt->fl.iif = in_dev->ifindex;
rt->fl.fld_fwmark = fl.fld_fwmark;
rt->fl.mark = fl.mark;
rt->u.dst.flags = DST_HOST;
rt->u.dst.neighbour = neigh;
@ -1457,9 +1447,7 @@ int dn_route_input(struct sk_buff *skb)
if ((rt->fl.fld_src == cb->src) &&
(rt->fl.fld_dst == cb->dst) &&
(rt->fl.oif == 0) &&
#ifdef CONFIG_DECNET_ROUTE_FWMARK
(rt->fl.fld_fwmark == skb->mark) &&
#endif
(rt->fl.mark == skb->mark) &&
(rt->fl.iif == cb->iif)) {
rt->u.dst.lastuse = jiffies;
dst_hold(&rt->u.dst);

12
net/decnet/dn_rules.c
View File

@ -45,10 +45,8 @@ struct dn_fib_rule
__le16 dstmask;
__le16 srcmap;
u8 flags;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
u32 fwmark;
u32 fwmask;
#endif
};
static struct dn_fib_rule default_rule = {
@ -131,10 +129,8 @@ static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
((daddr ^ r->dst) & r->dstmask))
return 0;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if ((r->fwmark ^ fl->fld_fwmark) & r->fwmask)
if ((r->fwmark ^ fl->mark) & r->fwmask)
return 0;
#endif
return 1;
}
@ -169,7 +165,6 @@ static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
if (tb[FRA_DST])
r->dst = nla_get_u16(tb[FRA_DST]);
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (tb[FRA_FWMARK]) {
r->fwmark = nla_get_u32(tb[FRA_FWMARK]);
if (r->fwmark)
@ -181,7 +176,6 @@ static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
if (tb[FRA_FWMASK])
r->fwmask = nla_get_u32(tb[FRA_FWMASK]);
#endif
r->src_len = frh->src_len;
r->srcmask = dnet_make_mask(r->src_len);
@ -203,13 +197,11 @@ static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
if (frh->dst_len && (r->dst_len != frh->dst_len))
return 0;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (tb[FRA_FWMARK] && (r->fwmark != nla_get_u32(tb[FRA_FWMARK])))
return 0;
if (tb[FRA_FWMASK] && (r->fwmask != nla_get_u32(tb[FRA_FWMASK])))
return 0;
#endif
if (tb[FRA_SRC] && (r->src != nla_get_u16(tb[FRA_SRC])))
return 0;
@ -248,12 +240,10 @@ static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
frh->src_len = r->src_len;
frh->tos = 0;
#ifdef CONFIG_DECNET_ROUTE_FWMARK
if (r->fwmark)
NLA_PUT_U32(skb, FRA_FWMARK, r->fwmark);
if (r->fwmask || r->fwmark)
NLA_PUT_U32(skb, FRA_FWMASK, r->fwmask);
#endif
if (r->dst_len)
NLA_PUT_U16(skb, FRA_DST, r->dst);
if (r->src_len)

7
net/ipv4/Kconfig
View File

@ -104,13 +104,6 @@ config IP_MULTIPLE_TABLES
If unsure, say N.
config IP_ROUTE_FWMARK
bool "IP: use netfilter MARK value as routing key"
depends on IP_MULTIPLE_TABLES && NETFILTER
help
If you say Y here, you will be able to specify different routes for
packets with different mark values (see iptables(8), MARK target).
config IP_ROUTE_MULTIPATH
bool "IP: equal cost multipath"
depends on IP_ADVANCED_ROUTER

4
net/ipv4/fib_frontend.c
View File

@ -768,8 +768,8 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
{
struct fib_result res;
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
.fwmark = frn->fl_fwmark,
struct flowi fl = { .mark = frn->fl_fwmark,
.nl_u = { .ip4_u = { .daddr = frn->fl_addr,
.tos = frn->fl_tos,
.scope = frn->fl_scope } } };
if (tb) {

12
net/ipv4/fib_rules.c
View File

@ -44,10 +44,8 @@ struct fib4_rule
__be32 srcmask;
__be32 dst;
__be32 dstmask;
#ifdef CONFIG_IP_ROUTE_FWMARK
u32 fwmark;
u32 fwmask;
#endif
#ifdef CONFIG_NET_CLS_ROUTE
u32 tclassid;
#endif
@ -160,10 +158,8 @@ static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
if (r->tos && (r->tos != fl->fl4_tos))
return 0;
#ifdef CONFIG_IP_ROUTE_FWMARK
if ((r->fwmark ^ fl->fl4_fwmark) & r->fwmask)
if ((r->fwmark ^ fl->mark) & r->fwmask)
return 0;
#endif
return 1;
}
@ -220,7 +216,6 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
if (tb[FRA_DST])
rule4->dst = nla_get_be32(tb[FRA_DST]);
#ifdef CONFIG_IP_ROUTE_FWMARK
if (tb[FRA_FWMARK]) {
rule4->fwmark = nla_get_u32(tb[FRA_FWMARK]);
if (rule4->fwmark)
@ -232,7 +227,6 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
if (tb[FRA_FWMASK])
rule4->fwmask = nla_get_u32(tb[FRA_FWMASK]);
#endif
#ifdef CONFIG_NET_CLS_ROUTE
if (tb[FRA_FLOW])
@ -264,13 +258,11 @@ static int fib4_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
if (frh->tos && (rule4->tos != frh->tos))
return 0;
#ifdef CONFIG_IP_ROUTE_FWMARK
if (tb[FRA_FWMARK] && (rule4->fwmark != nla_get_u32(tb[FRA_FWMARK])))
return 0;
if (tb[FRA_FWMASK] && (rule4->fwmask != nla_get_u32(tb[FRA_FWMASK])))
return 0;
#endif
#ifdef CONFIG_NET_CLS_ROUTE
if (tb[FRA_FLOW] && (rule4->tclassid != nla_get_u32(tb[FRA_FLOW])))
@ -296,13 +288,11 @@ static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
frh->src_len = rule4->src_len;
frh->tos = rule4->tos;
#ifdef CONFIG_IP_ROUTE_FWMARK
if (rule4->fwmark)
NLA_PUT_U32(skb, FRA_FWMARK, rule4->fwmark);
if (rule4->fwmask || rule4->fwmark)
NLA_PUT_U32(skb, FRA_FWMASK, rule4->fwmask);
#endif
if (rule4->dst_len)
NLA_PUT_BE32(skb, FRA_DST, rule4->dst);

4
net/ipv4/netfilter.c
View File

@ -27,9 +27,7 @@ int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type)
fl.nl_u.ip4_u.saddr = iph->saddr;
fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0;
#ifdef CONFIG_IP_ROUTE_FWMARK
fl.nl_u.ip4_u.fwmark = (*pskb)->mark;
#endif
fl.mark = (*pskb)->mark;
if (ip_route_output_key(&rt, &fl) != 0)
return -1;

2
net/ipv4/netfilter/iptable_mangle.c
View File

@ -153,9 +153,7 @@ ipt_local_hook(unsigned int hook,
if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE
&& ((*pskb)->nh.iph->saddr != saddr
|| (*pskb)->nh.iph->daddr != daddr
#ifdef CONFIG_IP_ROUTE_FWMARK
|| (*pskb)->mark != mark
#endif
|| (*pskb)->nh.iph->tos != tos))
if (ip_route_me_harder(pskb, RTN_UNSPEC))
ret = NF_DROP;

36
net/ipv4/route.c
View File

@ -568,9 +568,7 @@ static inline int compare_keys(struct flowi *fl1, struct flowi *fl2)
{
return ((fl1->nl_u.ip4_u.daddr ^ fl2->nl_u.ip4_u.daddr) |
(fl1->nl_u.ip4_u.saddr ^ fl2->nl_u.ip4_u.saddr) |
#ifdef CONFIG_IP_ROUTE_FWMARK
(fl1->nl_u.ip4_u.fwmark ^ fl2->nl_u.ip4_u.fwmark) |
#endif
(fl1->mark ^ fl2->mark) |
(*(u16 *)&fl1->nl_u.ip4_u.tos ^
*(u16 *)&fl2->nl_u.ip4_u.tos) |
(fl1->oif ^ fl2->oif) |
@ -1643,9 +1641,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
rth->fl.fl4_dst = daddr;
rth->rt_dst = daddr;
rth->fl.fl4_tos = tos;
#ifdef CONFIG_IP_ROUTE_FWMARK
rth->fl.fl4_fwmark= skb->mark;
#endif
rth->fl.mark = skb->mark;
rth->fl.fl4_src = saddr;
rth->rt_src = saddr;
#ifdef CONFIG_NET_CLS_ROUTE
@ -1789,9 +1785,7 @@ static inline int __mkroute_input(struct sk_buff *skb,
rth->fl.fl4_dst = daddr;
rth->rt_dst = daddr;
rth->fl.fl4_tos = tos;
#ifdef CONFIG_IP_ROUTE_FWMARK
rth->fl.fl4_fwmark= skb->mark;
#endif
rth->fl.mark = skb->mark;
rth->fl.fl4_src = saddr;
rth->rt_src = saddr;
rth->rt_gateway = daddr;
@ -1920,10 +1914,8 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
.saddr = saddr,
.tos = tos,
.scope = RT_SCOPE_UNIVERSE,
#ifdef CONFIG_IP_ROUTE_FWMARK
.fwmark = skb->mark
#endif
} },
.mark = skb->mark,
.iif = dev->ifindex };
unsigned flags = 0;
u32 itag = 0;
@ -2034,9 +2026,7 @@ out: return err;
rth->fl.fl4_dst = daddr;
rth->rt_dst = daddr;
rth->fl.fl4_tos = tos;
#ifdef CONFIG_IP_ROUTE_FWMARK
rth->fl.fl4_fwmark= skb->mark;
#endif
rth->fl.mark = skb->mark;
rth->fl.fl4_src = saddr;
rth->rt_src = saddr;
#ifdef CONFIG_NET_CLS_ROUTE
@ -2113,9 +2103,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
rth->fl.fl4_src == saddr &&
rth->fl.iif == iif &&
rth->fl.oif == 0 &&
#ifdef CONFIG_IP_ROUTE_FWMARK
rth->fl.fl4_fwmark == skb->mark &&
#endif
rth->fl.mark == skb->mark &&
rth->fl.fl4_tos == tos) {
rth->u.dst.lastuse = jiffies;
dst_hold(&rth->u.dst);
@ -2239,9 +2227,7 @@ static inline int __mkroute_output(struct rtable **result,
rth->fl.fl4_tos = tos;
rth->fl.fl4_src = oldflp->fl4_src;
rth->fl.oif = oldflp->oif;
#ifdef CONFIG_IP_ROUTE_FWMARK
rth->fl.fl4_fwmark= oldflp->fl4_fwmark;
#endif
rth->fl.mark = oldflp->mark;
rth->rt_dst = fl->fl4_dst;
rth->rt_src = fl->fl4_src;
rth->rt_iif = oldflp->oif ? : dev_out->ifindex;
@ -2385,10 +2371,8 @@ static int ip_route_output_slow(struct rtable **rp, const struct flowi *oldflp)
.scope = ((tos & RTO_ONLINK) ?
RT_SCOPE_LINK :
RT_SCOPE_UNIVERSE),
#ifdef CONFIG_IP_ROUTE_FWMARK
.fwmark = oldflp->fl4_fwmark
#endif
} },
.mark = oldflp->mark,
.iif = loopback_dev.ifindex,
.oif = oldflp->oif };
struct fib_result res;
@ -2583,9 +2567,7 @@ int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
rth->fl.fl4_src == flp->fl4_src &&
rth->fl.iif == 0 &&
rth->fl.oif == flp->oif &&
#ifdef CONFIG_IP_ROUTE_FWMARK
rth->fl.fl4_fwmark == flp->fl4_fwmark &&
#endif
rth->fl.mark == flp->mark &&
!((rth->fl.fl4_tos ^ flp->fl4_tos) &
(IPTOS_RT_MASK | RTO_ONLINK))) {

7
net/ipv6/Kconfig
View File

@ -196,10 +196,3 @@ config IPV6_SUBTREES
If unsure, say N.
config IPV6_ROUTE_FWMARK
bool "IPv6: use netfilter MARK value as routing key"
depends on IPV6_MULTIPLE_TABLES && NETFILTER
---help---
If you say Y here, you will be able to specify different routes for
packets with different mark values (see iptables(8), MARK target).

12
net/ipv6/fib6_rules.c
View File

@ -25,10 +25,8 @@ struct fib6_rule
struct fib_rule common;
struct rt6key src;
struct rt6key dst;
#ifdef CONFIG_IPV6_ROUTE_FWMARK
u32 fwmark;
u32 fwmask;
#endif
u8 tclass;
};
@ -130,10 +128,8 @@ static int fib6_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
if (r->tclass && r->tclass != ((ntohl(fl->fl6_flowlabel) >> 20) & 0xff))
return 0;
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if ((r->fwmark ^ fl->fl6_fwmark) & r->fwmask)
if ((r->fwmark ^ fl->mark) & r->fwmask)
return 0;
#endif
return 1;
}
@ -177,7 +173,6 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
nla_memcpy(&rule6->dst.addr, tb[FRA_DST],
sizeof(struct in6_addr));
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (tb[FRA_FWMARK]) {
rule6->fwmark = nla_get_u32(tb[FRA_FWMARK]);
if (rule6->fwmark) {
@ -192,7 +187,6 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
if (tb[FRA_FWMASK])
rule6->fwmask = nla_get_u32(tb[FRA_FWMASK]);
#endif
rule6->src.plen = frh->src_len;
rule6->dst.plen = frh->dst_len;
@ -225,13 +219,11 @@ static int fib6_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
nla_memcmp(tb[FRA_DST], &rule6->dst.addr, sizeof(struct in6_addr)))
return 0;
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (tb[FRA_FWMARK] && (rule6->fwmark != nla_get_u32(tb[FRA_FWMARK])))
return 0;
if (tb[FRA_FWMASK] && (rule6->fwmask != nla_get_u32(tb[FRA_FWMASK])))
return 0;
#endif
return 1;
}
@ -254,13 +246,11 @@ static int fib6_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
NLA_PUT(skb, FRA_SRC, sizeof(struct in6_addr),
&rule6->src.addr);
#ifdef CONFIG_IPV6_ROUTE_FWMARK
if (rule6->fwmark)
NLA_PUT_U32(skb, FRA_FWMARK, rule6->fwmark);
if (rule6->fwmask || rule6->fwmark)
NLA_PUT_U32(skb, FRA_FWMASK, rule6->fwmask);
#endif
return 0;

4
net/ipv6/route.c
View File

@ -711,12 +711,10 @@ void ip6_route_input(struct sk_buff *skb)
.ip6_u = {
.daddr = iph->daddr,
.saddr = iph->saddr,
#ifdef CONFIG_IPV6_ROUTE_FWMARK
.fwmark = skb->mark,
#endif
.flowlabel = (* (__be32 *) iph)&IPV6_FLOWINFO_MASK,
},
},
.mark = skb->mark,
.proto = iph->nexthdr,
};