2005-04-16 22:20:36 +00:00
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/*
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*
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* Generic internet FLOW.
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*
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*/
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#ifndef _NET_FLOW_H
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#define _NET_FLOW_H
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2011-09-05 16:47:24 +00:00
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#include <linux/socket.h>
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2005-04-16 22:20:36 +00:00
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#include <linux/in6.h>
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2011-07-26 23:09:06 +00:00
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#include <linux/atomic.h>
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2015-09-01 16:24:25 +00:00
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#include <net/flow_dissector.h>
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2016-11-03 17:23:42 +00:00
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#include <linux/uidgid.h>
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2005-04-16 22:20:36 +00:00
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ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
As suggested by Julian:
Simply, flowi4_iif must not contain 0, it does not
look logical to ignore all ip rules with specified iif.
because in fib_rule_match() we do:
if (rule->iifindex && (rule->iifindex != fl->flowi_iif))
goto out;
flowi4_iif should be LOOPBACK_IFINDEX by default.
We need to move LOOPBACK_IFINDEX to include/net/flow.h:
1) It is mostly used by flowi_iif
2) Fix the following compile error if we use it in flow.h
by the patches latter:
In file included from include/linux/netfilter.h:277:0,
from include/net/netns/netfilter.h:5,
from include/net/net_namespace.h:21,
from include/linux/netdevice.h:43,
from include/linux/icmpv6.h:12,
from include/linux/ipv6.h:61,
from include/net/ipv6.h:16,
from include/linux/sunrpc/clnt.h:27,
from include/linux/nfs_fs.h:30,
from init/do_mounts.c:32:
include/net/flow.h: In function ‘flowi4_init_output’:
include/net/flow.h:84:32: error: ‘LOOPBACK_IFINDEX’ undeclared (first use in this function)
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-15 23:25:34 +00:00
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/*
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* ifindex generation is per-net namespace, and loopback is
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* always the 1st device in ns (see net_dev_init), thus any
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* loopback device should get ifindex 1
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*/
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#define LOOPBACK_IFINDEX 1
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2015-07-21 08:43:59 +00:00
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struct flowi_tunnel {
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__be64 tun_id;
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};
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2011-03-11 23:22:00 +00:00
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struct flowi_common {
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int flowic_oif;
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int flowic_iif;
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__u32 flowic_mark;
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__u8 flowic_tos;
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__u8 flowic_scope;
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__u8 flowic_proto;
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__u8 flowic_flags;
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2011-03-11 20:55:37 +00:00
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#define FLOWI_FLAG_ANYSRC 0x01
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2013-08-28 06:04:14 +00:00
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#define FLOWI_FLAG_KNOWN_NH 0x02
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2016-09-10 19:10:02 +00:00
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#define FLOWI_FLAG_SKIP_NH_OIF 0x04
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2011-03-11 23:22:00 +00:00
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__u32 flowic_secid;
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2015-07-21 08:43:59 +00:00
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struct flowi_tunnel flowic_tun_key;
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2016-11-03 17:23:42 +00:00
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kuid_t flowic_uid;
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2011-03-11 23:22:00 +00:00
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};
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2011-03-11 23:36:42 +00:00
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union flowi_uli {
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struct {
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__be16 dport;
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2011-04-01 01:03:35 +00:00
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__be16 sport;
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2011-03-11 23:36:42 +00:00
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} ports;
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struct {
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__u8 type;
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__u8 code;
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} icmpt;
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struct {
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__le16 dport;
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2011-04-01 01:03:35 +00:00
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__le16 sport;
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2011-03-11 23:36:42 +00:00
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} dnports;
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__be32 spi;
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__be32 gre_key;
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struct {
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__u8 type;
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} mht;
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};
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2011-03-12 05:44:35 +00:00
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struct flowi4 {
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struct flowi_common __fl_common;
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2011-03-12 00:54:08 +00:00
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#define flowi4_oif __fl_common.flowic_oif
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#define flowi4_iif __fl_common.flowic_iif
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#define flowi4_mark __fl_common.flowic_mark
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#define flowi4_tos __fl_common.flowic_tos
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#define flowi4_scope __fl_common.flowic_scope
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#define flowi4_proto __fl_common.flowic_proto
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#define flowi4_flags __fl_common.flowic_flags
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#define flowi4_secid __fl_common.flowic_secid
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2015-07-21 08:43:59 +00:00
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#define flowi4_tun_key __fl_common.flowic_tun_key
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2016-11-03 17:23:42 +00:00
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#define flowi4_uid __fl_common.flowic_uid
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2011-11-30 19:00:53 +00:00
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/* (saddr,daddr) must be grouped, same order as in IP header */
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2011-03-12 05:44:35 +00:00
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__be32 saddr;
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2011-11-30 19:00:53 +00:00
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__be32 daddr;
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2011-03-12 05:44:35 +00:00
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union flowi_uli uli;
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2011-03-12 08:00:33 +00:00
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#define fl4_sport uli.ports.sport
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#define fl4_dport uli.ports.dport
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#define fl4_icmp_type uli.icmpt.type
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#define fl4_icmp_code uli.icmpt.code
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#define fl4_ipsec_spi uli.spi
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#define fl4_mh_type uli.mht.type
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#define fl4_gre_key uli.gre_key
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2011-09-05 16:47:23 +00:00
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} __attribute__((__aligned__(BITS_PER_LONG/8)));
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2011-03-12 05:44:35 +00:00
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2011-03-31 11:52:14 +00:00
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static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
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__u32 mark, __u8 tos, __u8 scope,
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__u8 proto, __u8 flags,
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__be32 daddr, __be32 saddr,
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2016-11-03 17:23:43 +00:00
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__be16 dport, __be16 sport,
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kuid_t uid)
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2011-03-31 11:52:14 +00:00
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{
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fl4->flowi4_oif = oif;
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ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
As suggested by Julian:
Simply, flowi4_iif must not contain 0, it does not
look logical to ignore all ip rules with specified iif.
because in fib_rule_match() we do:
if (rule->iifindex && (rule->iifindex != fl->flowi_iif))
goto out;
flowi4_iif should be LOOPBACK_IFINDEX by default.
We need to move LOOPBACK_IFINDEX to include/net/flow.h:
1) It is mostly used by flowi_iif
2) Fix the following compile error if we use it in flow.h
by the patches latter:
In file included from include/linux/netfilter.h:277:0,
from include/net/netns/netfilter.h:5,
from include/net/net_namespace.h:21,
from include/linux/netdevice.h:43,
from include/linux/icmpv6.h:12,
from include/linux/ipv6.h:61,
from include/net/ipv6.h:16,
from include/linux/sunrpc/clnt.h:27,
from include/linux/nfs_fs.h:30,
from init/do_mounts.c:32:
include/net/flow.h: In function ‘flowi4_init_output’:
include/net/flow.h:84:32: error: ‘LOOPBACK_IFINDEX’ undeclared (first use in this function)
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-15 23:25:34 +00:00
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fl4->flowi4_iif = LOOPBACK_IFINDEX;
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2011-03-31 11:52:14 +00:00
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fl4->flowi4_mark = mark;
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fl4->flowi4_tos = tos;
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fl4->flowi4_scope = scope;
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fl4->flowi4_proto = proto;
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fl4->flowi4_flags = flags;
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fl4->flowi4_secid = 0;
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2015-07-21 08:43:59 +00:00
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fl4->flowi4_tun_key.tun_id = 0;
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2016-11-03 17:23:43 +00:00
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fl4->flowi4_uid = uid;
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2011-03-31 11:52:14 +00:00
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fl4->daddr = daddr;
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fl4->saddr = saddr;
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fl4->fl4_dport = dport;
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2011-04-01 01:03:35 +00:00
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fl4->fl4_sport = sport;
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2011-03-31 11:52:14 +00:00
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}
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2012-02-04 13:04:46 +00:00
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/* Reset some input parameters after previous lookup */
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static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
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__be32 daddr, __be32 saddr)
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{
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fl4->flowi4_oif = oif;
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fl4->flowi4_tos = tos;
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fl4->daddr = daddr;
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fl4->saddr = saddr;
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}
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2011-03-31 11:52:14 +00:00
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2011-03-12 05:44:35 +00:00
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struct flowi6 {
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2011-03-11 23:22:00 +00:00
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struct flowi_common __fl_common;
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2011-03-12 07:30:50 +00:00
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#define flowi6_oif __fl_common.flowic_oif
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#define flowi6_iif __fl_common.flowic_iif
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#define flowi6_mark __fl_common.flowic_mark
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#define flowi6_scope __fl_common.flowic_scope
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#define flowi6_proto __fl_common.flowic_proto
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#define flowi6_flags __fl_common.flowic_flags
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#define flowi6_secid __fl_common.flowic_secid
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2015-08-20 11:56:31 +00:00
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#define flowi6_tun_key __fl_common.flowic_tun_key
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2016-11-03 17:23:42 +00:00
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#define flowi6_uid __fl_common.flowic_uid
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2011-03-12 05:44:35 +00:00
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struct in6_addr daddr;
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struct in6_addr saddr;
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2016-03-18 17:37:59 +00:00
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/* Note: flowi6_tos is encoded in flowlabel, too. */
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2011-03-12 05:44:35 +00:00
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__be32 flowlabel;
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union flowi_uli uli;
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2011-03-12 21:36:19 +00:00
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#define fl6_sport uli.ports.sport
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#define fl6_dport uli.ports.dport
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#define fl6_icmp_type uli.icmpt.type
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#define fl6_icmp_code uli.icmpt.code
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#define fl6_ipsec_spi uli.spi
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#define fl6_mh_type uli.mht.type
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#define fl6_gre_key uli.gre_key
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2011-09-05 16:47:23 +00:00
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} __attribute__((__aligned__(BITS_PER_LONG/8)));
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2005-04-16 22:20:36 +00:00
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2011-03-12 05:44:35 +00:00
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struct flowidn {
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struct flowi_common __fl_common;
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2011-03-12 22:17:10 +00:00
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#define flowidn_oif __fl_common.flowic_oif
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#define flowidn_iif __fl_common.flowic_iif
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#define flowidn_mark __fl_common.flowic_mark
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#define flowidn_scope __fl_common.flowic_scope
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#define flowidn_proto __fl_common.flowic_proto
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#define flowidn_flags __fl_common.flowic_flags
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2011-03-12 05:44:35 +00:00
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__le16 daddr;
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__le16 saddr;
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union flowi_uli uli;
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2011-03-12 22:17:10 +00:00
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#define fld_sport uli.ports.sport
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#define fld_dport uli.ports.dport
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2011-09-05 16:47:23 +00:00
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} __attribute__((__aligned__(BITS_PER_LONG/8)));
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2011-03-12 05:44:35 +00:00
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struct flowi {
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2005-04-16 22:20:36 +00:00
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union {
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2011-03-12 05:44:35 +00:00
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struct flowi_common __fl_common;
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struct flowi4 ip4;
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struct flowi6 ip6;
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struct flowidn dn;
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} u;
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#define flowi_oif u.__fl_common.flowic_oif
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#define flowi_iif u.__fl_common.flowic_iif
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#define flowi_mark u.__fl_common.flowic_mark
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#define flowi_tos u.__fl_common.flowic_tos
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#define flowi_scope u.__fl_common.flowic_scope
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#define flowi_proto u.__fl_common.flowic_proto
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#define flowi_flags u.__fl_common.flowic_flags
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#define flowi_secid u.__fl_common.flowic_secid
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2015-07-21 08:43:59 +00:00
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#define flowi_tun_key u.__fl_common.flowic_tun_key
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2016-11-03 17:23:42 +00:00
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#define flowi_uid u.__fl_common.flowic_uid
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2005-04-16 22:20:36 +00:00
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} __attribute__((__aligned__(BITS_PER_LONG/8)));
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2011-03-12 00:23:02 +00:00
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static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
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{
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return container_of(fl4, struct flowi, u.ip4);
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}
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static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
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{
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return container_of(fl6, struct flowi, u.ip6);
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}
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static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
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{
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return container_of(fldn, struct flowi, u.dn);
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}
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2011-09-05 16:47:24 +00:00
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typedef unsigned long flow_compare_t;
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2017-04-02 21:51:50 +00:00
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static inline unsigned int flow_key_size(u16 family)
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2011-09-05 16:47:24 +00:00
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{
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switch (family) {
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case AF_INET:
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BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
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return sizeof(struct flowi4) / sizeof(flow_compare_t);
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case AF_INET6:
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BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
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return sizeof(struct flowi6) / sizeof(flow_compare_t);
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case AF_DECnet:
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BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
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return sizeof(struct flowidn) / sizeof(flow_compare_t);
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}
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return 0;
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}
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2015-09-02 04:19:17 +00:00
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__u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys);
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2015-09-01 16:24:25 +00:00
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2015-09-02 04:19:17 +00:00
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static inline __u32 get_hash_from_flowi6(const struct flowi6 *fl6)
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2015-09-01 16:24:25 +00:00
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{
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struct flow_keys keys;
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return __get_hash_from_flowi6(fl6, &keys);
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}
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2015-09-02 04:19:17 +00:00
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__u32 __get_hash_from_flowi4(const struct flowi4 *fl4, struct flow_keys *keys);
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2015-09-01 16:24:25 +00:00
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2015-09-02 04:19:17 +00:00
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static inline __u32 get_hash_from_flowi4(const struct flowi4 *fl4)
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2015-09-01 16:24:25 +00:00
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{
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struct flow_keys keys;
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return __get_hash_from_flowi4(fl4, &keys);
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}
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2005-04-16 22:20:36 +00:00
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#endif
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