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220 lines
5.6 KiB
220 lines
5.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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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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#include <linux/socket.h> |
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#include <linux/in6.h> |
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#include <linux/atomic.h> |
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#include <net/flow_dissector.h> |
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#include <linux/uidgid.h> |
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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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struct flowi_tunnel { |
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__be64 tun_id; |
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}; |
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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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#define FLOWI_FLAG_ANYSRC 0x01 |
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#define FLOWI_FLAG_KNOWN_NH 0x02 |
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#define FLOWI_FLAG_SKIP_NH_OIF 0x04 |
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__u32 flowic_secid; |
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kuid_t flowic_uid; |
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struct flowi_tunnel flowic_tun_key; |
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__u32 flowic_multipath_hash; |
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}; |
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union flowi_uli { |
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struct { |
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__be16 dport; |
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__be16 sport; |
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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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__le16 sport; |
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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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struct flowi4 { |
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struct flowi_common __fl_common; |
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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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#define flowi4_tun_key __fl_common.flowic_tun_key |
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#define flowi4_uid __fl_common.flowic_uid |
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#define flowi4_multipath_hash __fl_common.flowic_multipath_hash |
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/* (saddr,daddr) must be grouped, same order as in IP header */ |
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__be32 saddr; |
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__be32 daddr; |
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union flowi_uli uli; |
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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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} __attribute__((__aligned__(BITS_PER_LONG/8))); |
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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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__be16 dport, __be16 sport, |
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kuid_t uid) |
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{ |
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fl4->flowi4_oif = oif; |
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fl4->flowi4_iif = LOOPBACK_IFINDEX; |
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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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fl4->flowi4_tun_key.tun_id = 0; |
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fl4->flowi4_uid = uid; |
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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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fl4->fl4_sport = sport; |
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fl4->flowi4_multipath_hash = 0; |
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} |
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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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struct flowi6 { |
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struct flowi_common __fl_common; |
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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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#define flowi6_tun_key __fl_common.flowic_tun_key |
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#define flowi6_uid __fl_common.flowic_uid |
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struct in6_addr daddr; |
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struct in6_addr saddr; |
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/* Note: flowi6_tos is encoded in flowlabel, too. */ |
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__be32 flowlabel; |
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union flowi_uli uli; |
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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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__u32 mp_hash; |
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} __attribute__((__aligned__(BITS_PER_LONG/8))); |
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struct flowidn { |
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struct flowi_common __fl_common; |
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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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__le16 daddr; |
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__le16 saddr; |
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union flowi_uli uli; |
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#define fld_sport uli.ports.sport |
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#define fld_dport uli.ports.dport |
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} __attribute__((__aligned__(BITS_PER_LONG/8))); |
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struct flowi { |
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union { |
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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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#define flowi_tun_key u.__fl_common.flowic_tun_key |
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#define flowi_uid u.__fl_common.flowic_uid |
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} __attribute__((__aligned__(BITS_PER_LONG/8))); |
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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_common *flowi4_to_flowi_common(struct flowi4 *fl4) |
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{ |
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return &(flowi4_to_flowi(fl4)->u.__fl_common); |
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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_common *flowi6_to_flowi_common(struct flowi6 *fl6) |
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{ |
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return &(flowi6_to_flowi(fl6)->u.__fl_common); |
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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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__u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys); |
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#endif
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