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linux-stable/include/uapi/linux/pkt_cls.h
Pieter Jansen van Vuuren 0a6e77784f net/sched: allow flower to match tunnel options 
Allow matching on options in Geneve tunnel headers.
This makes use of existing tunnel metadata support.

The options can be described in the form
CLASS:TYPE:DATA/CLASS_MASK:TYPE_MASK:DATA_MASK, where CLASS is
represented as a 16bit hexadecimal value, TYPE as an 8bit
hexadecimal value and DATA as a variable length hexadecimal value.

e.g.
 # ip link add name geneve0 type geneve dstport 0 external
 # tc qdisc add dev geneve0 ingress
 # tc filter add dev geneve0 protocol ip parent ffff: \
     flower \
       enc_src_ip 10.0.99.192 \
       enc_dst_ip 10.0.99.193 \
       enc_key_id 11 \
       geneve_opts 0102:80:1122334421314151/ffff:ff:ffffffffffffffff \
       ip_proto udp \
       action mirred egress redirect dev eth1

This patch adds support for matching Geneve options in the order
supplied by the user. This leads to an efficient implementation in
the software datapath (and in our opinion hardware datapaths that
offload this feature). It is also compatible with Geneve options
matching provided by the Open vSwitch kernel datapath which is
relevant here as the Flower classifier may be used as a mechanism
to program flows into hardware as a form of Open vSwitch datapath
offload (sometimes referred to as OVS-TC). The netlink
Kernel/Userspace API may be extended, for example by adding a flag,
if other matching options are desired, for example matching given
options in any order. This would require an implementation in the
TC software datapath. And be done in a way that drivers that
facilitate offload of the Flower classifier can reject or accept
such flows based on hardware datapath capabilities.

This approach was discussed and agreed on at Netconf 2017 in Seoul.

Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-07 12:22:15 -07:00

610 lines
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __LINUX_PKT_CLS_H
#define __LINUX_PKT_CLS_H
#include <linux/types.h>
#include <linux/pkt_sched.h>
#define TC_COOKIE_MAX_SIZE 16
/* Action attributes */
enum {
TCA_ACT_UNSPEC,
TCA_ACT_KIND,
TCA_ACT_OPTIONS,
TCA_ACT_INDEX,
TCA_ACT_STATS,
TCA_ACT_PAD,
TCA_ACT_COOKIE,
__TCA_ACT_MAX
};
#define TCA_ACT_MAX __TCA_ACT_MAX
#define TCA_OLD_COMPAT (TCA_ACT_MAX+1)
#define TCA_ACT_MAX_PRIO 32
#define TCA_ACT_BIND 1
#define TCA_ACT_NOBIND 0
#define TCA_ACT_UNBIND 1
#define TCA_ACT_NOUNBIND 0
#define TCA_ACT_REPLACE 1
#define TCA_ACT_NOREPLACE 0
#define TC_ACT_UNSPEC (-1)
#define TC_ACT_OK 0
#define TC_ACT_RECLASSIFY 1
#define TC_ACT_SHOT 2
#define TC_ACT_PIPE 3
#define TC_ACT_STOLEN 4
#define TC_ACT_QUEUED 5
#define TC_ACT_REPEAT 6
#define TC_ACT_REDIRECT 7
#define TC_ACT_TRAP 8 /* For hw path, this means "trap to cpu"
* and don't further process the frame
* in hardware. For sw path, this is
* equivalent of TC_ACT_STOLEN - drop
* the skb and act like everything
* is alright.
*/
#define TC_ACT_VALUE_MAX TC_ACT_TRAP
/* There is a special kind of actions called "extended actions",
* which need a value parameter. These have a local opcode located in
* the highest nibble, starting from 1. The rest of the bits
* are used to carry the value. These two parts together make
* a combined opcode.
*/
#define __TC_ACT_EXT_SHIFT 28
#define __TC_ACT_EXT(local) ((local) << __TC_ACT_EXT_SHIFT)
#define TC_ACT_EXT_VAL_MASK ((1 << __TC_ACT_EXT_SHIFT) - 1)
#define TC_ACT_EXT_OPCODE(combined) ((combined) & (~TC_ACT_EXT_VAL_MASK))
#define TC_ACT_EXT_CMP(combined, opcode) (TC_ACT_EXT_OPCODE(combined) == opcode)
#define TC_ACT_JUMP __TC_ACT_EXT(1)
#define TC_ACT_GOTO_CHAIN __TC_ACT_EXT(2)
#define TC_ACT_EXT_OPCODE_MAX TC_ACT_GOTO_CHAIN
/* Action type identifiers*/
enum {
TCA_ID_UNSPEC=0,
TCA_ID_POLICE=1,
/* other actions go here */
__TCA_ID_MAX=255
};
#define TCA_ID_MAX __TCA_ID_MAX
struct tc_police {
__u32 index;
int action;
#define TC_POLICE_UNSPEC TC_ACT_UNSPEC
#define TC_POLICE_OK TC_ACT_OK
#define TC_POLICE_RECLASSIFY TC_ACT_RECLASSIFY
#define TC_POLICE_SHOT TC_ACT_SHOT
#define TC_POLICE_PIPE TC_ACT_PIPE
__u32 limit;
__u32 burst;
__u32 mtu;
struct tc_ratespec rate;
struct tc_ratespec peakrate;
int refcnt;
int bindcnt;
__u32 capab;
};
struct tcf_t {
__u64 install;
__u64 lastuse;
__u64 expires;
__u64 firstuse;
};
struct tc_cnt {
int refcnt;
int bindcnt;
};
#define tc_gen \
__u32 index; \
__u32 capab; \
int action; \
int refcnt; \
int bindcnt
enum {
TCA_POLICE_UNSPEC,
TCA_POLICE_TBF,
TCA_POLICE_RATE,
TCA_POLICE_PEAKRATE,
TCA_POLICE_AVRATE,
TCA_POLICE_RESULT,
TCA_POLICE_TM,
TCA_POLICE_PAD,
__TCA_POLICE_MAX
#define TCA_POLICE_RESULT TCA_POLICE_RESULT
};
#define TCA_POLICE_MAX (__TCA_POLICE_MAX - 1)
/* tca flags definitions */
#define TCA_CLS_FLAGS_SKIP_HW (1 << 0) /* don't offload filter to HW */
#define TCA_CLS_FLAGS_SKIP_SW (1 << 1) /* don't use filter in SW */
#define TCA_CLS_FLAGS_IN_HW (1 << 2) /* filter is offloaded to HW */
#define TCA_CLS_FLAGS_NOT_IN_HW (1 << 3) /* filter isn't offloaded to HW */
#define TCA_CLS_FLAGS_VERBOSE (1 << 4) /* verbose logging */
/* U32 filters */
#define TC_U32_HTID(h) ((h)&0xFFF00000)
#define TC_U32_USERHTID(h) (TC_U32_HTID(h)>>20)
#define TC_U32_HASH(h) (((h)>>12)&0xFF)
#define TC_U32_NODE(h) ((h)&0xFFF)
#define TC_U32_KEY(h) ((h)&0xFFFFF)
#define TC_U32_UNSPEC 0
#define TC_U32_ROOT (0xFFF00000)
enum {
TCA_U32_UNSPEC,
TCA_U32_CLASSID,
TCA_U32_HASH,
TCA_U32_LINK,
TCA_U32_DIVISOR,
TCA_U32_SEL,
TCA_U32_POLICE,
TCA_U32_ACT,
TCA_U32_INDEV,
TCA_U32_PCNT,
TCA_U32_MARK,
TCA_U32_FLAGS,
TCA_U32_PAD,
__TCA_U32_MAX
};
#define TCA_U32_MAX (__TCA_U32_MAX - 1)
struct tc_u32_key {
__be32 mask;
__be32 val;
int off;
int offmask;
};
struct tc_u32_sel {
unsigned char flags;
unsigned char offshift;
unsigned char nkeys;
__be16 offmask;
__u16 off;
short offoff;
short hoff;
__be32 hmask;
struct tc_u32_key keys[0];
};
struct tc_u32_mark {
__u32 val;
__u32 mask;
__u32 success;
};
struct tc_u32_pcnt {
__u64 rcnt;
__u64 rhit;
__u64 kcnts[0];
};
/* Flags */
#define TC_U32_TERMINAL 1
#define TC_U32_OFFSET 2
#define TC_U32_VAROFFSET 4
#define TC_U32_EAT 8
#define TC_U32_MAXDEPTH 8
/* RSVP filter */
enum {
TCA_RSVP_UNSPEC,
TCA_RSVP_CLASSID,
TCA_RSVP_DST,
TCA_RSVP_SRC,
TCA_RSVP_PINFO,
TCA_RSVP_POLICE,
TCA_RSVP_ACT,
__TCA_RSVP_MAX
};
#define TCA_RSVP_MAX (__TCA_RSVP_MAX - 1 )
struct tc_rsvp_gpi {
__u32 key;
__u32 mask;
int offset;
};
struct tc_rsvp_pinfo {
struct tc_rsvp_gpi dpi;
struct tc_rsvp_gpi spi;
__u8 protocol;
__u8 tunnelid;
__u8 tunnelhdr;
__u8 pad;
};
/* ROUTE filter */
enum {
TCA_ROUTE4_UNSPEC,
TCA_ROUTE4_CLASSID,
TCA_ROUTE4_TO,
TCA_ROUTE4_FROM,
TCA_ROUTE4_IIF,
TCA_ROUTE4_POLICE,
TCA_ROUTE4_ACT,
__TCA_ROUTE4_MAX
};
#define TCA_ROUTE4_MAX (__TCA_ROUTE4_MAX - 1)
/* FW filter */
enum {
TCA_FW_UNSPEC,
TCA_FW_CLASSID,
TCA_FW_POLICE,
TCA_FW_INDEV, /* used by CONFIG_NET_CLS_IND */
TCA_FW_ACT, /* used by CONFIG_NET_CLS_ACT */
TCA_FW_MASK,
__TCA_FW_MAX
};
#define TCA_FW_MAX (__TCA_FW_MAX - 1)
/* TC index filter */
enum {
TCA_TCINDEX_UNSPEC,
TCA_TCINDEX_HASH,
TCA_TCINDEX_MASK,
TCA_TCINDEX_SHIFT,
TCA_TCINDEX_FALL_THROUGH,
TCA_TCINDEX_CLASSID,
TCA_TCINDEX_POLICE,
TCA_TCINDEX_ACT,
__TCA_TCINDEX_MAX
};
#define TCA_TCINDEX_MAX (__TCA_TCINDEX_MAX - 1)
/* Flow filter */
enum {
FLOW_KEY_SRC,
FLOW_KEY_DST,
FLOW_KEY_PROTO,
FLOW_KEY_PROTO_SRC,
FLOW_KEY_PROTO_DST,
FLOW_KEY_IIF,
FLOW_KEY_PRIORITY,
FLOW_KEY_MARK,
FLOW_KEY_NFCT,
FLOW_KEY_NFCT_SRC,
FLOW_KEY_NFCT_DST,
FLOW_KEY_NFCT_PROTO_SRC,
FLOW_KEY_NFCT_PROTO_DST,
FLOW_KEY_RTCLASSID,
FLOW_KEY_SKUID,
FLOW_KEY_SKGID,
FLOW_KEY_VLAN_TAG,
FLOW_KEY_RXHASH,
__FLOW_KEY_MAX,
};
#define FLOW_KEY_MAX (__FLOW_KEY_MAX - 1)
enum {
FLOW_MODE_MAP,
FLOW_MODE_HASH,
};
enum {
TCA_FLOW_UNSPEC,
TCA_FLOW_KEYS,
TCA_FLOW_MODE,
TCA_FLOW_BASECLASS,
TCA_FLOW_RSHIFT,
TCA_FLOW_ADDEND,
TCA_FLOW_MASK,
TCA_FLOW_XOR,
TCA_FLOW_DIVISOR,
TCA_FLOW_ACT,
TCA_FLOW_POLICE,
TCA_FLOW_EMATCHES,
TCA_FLOW_PERTURB,
__TCA_FLOW_MAX
};
#define TCA_FLOW_MAX (__TCA_FLOW_MAX - 1)
/* Basic filter */
enum {
TCA_BASIC_UNSPEC,
TCA_BASIC_CLASSID,
TCA_BASIC_EMATCHES,
TCA_BASIC_ACT,
TCA_BASIC_POLICE,
__TCA_BASIC_MAX
};
#define TCA_BASIC_MAX (__TCA_BASIC_MAX - 1)
/* Cgroup classifier */
enum {
TCA_CGROUP_UNSPEC,
TCA_CGROUP_ACT,
TCA_CGROUP_POLICE,
TCA_CGROUP_EMATCHES,
__TCA_CGROUP_MAX,
};
#define TCA_CGROUP_MAX (__TCA_CGROUP_MAX - 1)
/* BPF classifier */
#define TCA_BPF_FLAG_ACT_DIRECT (1 << 0)
enum {
TCA_BPF_UNSPEC,
TCA_BPF_ACT,
TCA_BPF_POLICE,
TCA_BPF_CLASSID,
TCA_BPF_OPS_LEN,
TCA_BPF_OPS,
TCA_BPF_FD,
TCA_BPF_NAME,
TCA_BPF_FLAGS,
TCA_BPF_FLAGS_GEN,
TCA_BPF_TAG,
TCA_BPF_ID,
__TCA_BPF_MAX,
};
#define TCA_BPF_MAX (__TCA_BPF_MAX - 1)
/* Flower classifier */
enum {
TCA_FLOWER_UNSPEC,
TCA_FLOWER_CLASSID,
TCA_FLOWER_INDEV,
TCA_FLOWER_ACT,
TCA_FLOWER_KEY_ETH_DST, /* ETH_ALEN */
TCA_FLOWER_KEY_ETH_DST_MASK, /* ETH_ALEN */
TCA_FLOWER_KEY_ETH_SRC, /* ETH_ALEN */
TCA_FLOWER_KEY_ETH_SRC_MASK, /* ETH_ALEN */
TCA_FLOWER_KEY_ETH_TYPE, /* be16 */
TCA_FLOWER_KEY_IP_PROTO, /* u8 */
TCA_FLOWER_KEY_IPV4_SRC, /* be32 */
TCA_FLOWER_KEY_IPV4_SRC_MASK, /* be32 */
TCA_FLOWER_KEY_IPV4_DST, /* be32 */
TCA_FLOWER_KEY_IPV4_DST_MASK, /* be32 */
TCA_FLOWER_KEY_IPV6_SRC, /* struct in6_addr */
TCA_FLOWER_KEY_IPV6_SRC_MASK, /* struct in6_addr */
TCA_FLOWER_KEY_IPV6_DST, /* struct in6_addr */
TCA_FLOWER_KEY_IPV6_DST_MASK, /* struct in6_addr */
TCA_FLOWER_KEY_TCP_SRC, /* be16 */
TCA_FLOWER_KEY_TCP_DST, /* be16 */
TCA_FLOWER_KEY_UDP_SRC, /* be16 */
TCA_FLOWER_KEY_UDP_DST, /* be16 */
TCA_FLOWER_FLAGS,
TCA_FLOWER_KEY_VLAN_ID, /* be16 */
TCA_FLOWER_KEY_VLAN_PRIO, /* u8 */
TCA_FLOWER_KEY_VLAN_ETH_TYPE, /* be16 */
TCA_FLOWER_KEY_ENC_KEY_ID, /* be32 */
TCA_FLOWER_KEY_ENC_IPV4_SRC, /* be32 */
TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,/* be32 */
TCA_FLOWER_KEY_ENC_IPV4_DST, /* be32 */
TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,/* be32 */
TCA_FLOWER_KEY_ENC_IPV6_SRC, /* struct in6_addr */
TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,/* struct in6_addr */
TCA_FLOWER_KEY_ENC_IPV6_DST, /* struct in6_addr */
TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,/* struct in6_addr */
TCA_FLOWER_KEY_TCP_SRC_MASK, /* be16 */
TCA_FLOWER_KEY_TCP_DST_MASK, /* be16 */
TCA_FLOWER_KEY_UDP_SRC_MASK, /* be16 */
TCA_FLOWER_KEY_UDP_DST_MASK, /* be16 */
TCA_FLOWER_KEY_SCTP_SRC_MASK, /* be16 */
TCA_FLOWER_KEY_SCTP_DST_MASK, /* be16 */
TCA_FLOWER_KEY_SCTP_SRC, /* be16 */
TCA_FLOWER_KEY_SCTP_DST, /* be16 */
TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, /* be16 */
TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, /* be16 */
TCA_FLOWER_KEY_ENC_UDP_DST_PORT, /* be16 */
TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, /* be16 */
TCA_FLOWER_KEY_FLAGS, /* be32 */
TCA_FLOWER_KEY_FLAGS_MASK, /* be32 */
TCA_FLOWER_KEY_ICMPV4_CODE, /* u8 */
TCA_FLOWER_KEY_ICMPV4_CODE_MASK,/* u8 */
TCA_FLOWER_KEY_ICMPV4_TYPE, /* u8 */
TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,/* u8 */
TCA_FLOWER_KEY_ICMPV6_CODE, /* u8 */
TCA_FLOWER_KEY_ICMPV6_CODE_MASK,/* u8 */
TCA_FLOWER_KEY_ICMPV6_TYPE, /* u8 */
TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,/* u8 */
TCA_FLOWER_KEY_ARP_SIP, /* be32 */
TCA_FLOWER_KEY_ARP_SIP_MASK, /* be32 */
TCA_FLOWER_KEY_ARP_TIP, /* be32 */
TCA_FLOWER_KEY_ARP_TIP_MASK, /* be32 */
TCA_FLOWER_KEY_ARP_OP, /* u8 */
TCA_FLOWER_KEY_ARP_OP_MASK, /* u8 */
TCA_FLOWER_KEY_ARP_SHA, /* ETH_ALEN */
TCA_FLOWER_KEY_ARP_SHA_MASK, /* ETH_ALEN */
TCA_FLOWER_KEY_ARP_THA, /* ETH_ALEN */
TCA_FLOWER_KEY_ARP_THA_MASK, /* ETH_ALEN */
TCA_FLOWER_KEY_MPLS_TTL, /* u8 - 8 bits */
TCA_FLOWER_KEY_MPLS_BOS, /* u8 - 1 bit */
TCA_FLOWER_KEY_MPLS_TC, /* u8 - 3 bits */
TCA_FLOWER_KEY_MPLS_LABEL, /* be32 - 20 bits */
TCA_FLOWER_KEY_TCP_FLAGS, /* be16 */
TCA_FLOWER_KEY_TCP_FLAGS_MASK, /* be16 */
TCA_FLOWER_KEY_IP_TOS, /* u8 */
TCA_FLOWER_KEY_IP_TOS_MASK, /* u8 */
TCA_FLOWER_KEY_IP_TTL, /* u8 */
TCA_FLOWER_KEY_IP_TTL_MASK, /* u8 */
TCA_FLOWER_KEY_CVLAN_ID, /* be16 */
TCA_FLOWER_KEY_CVLAN_PRIO, /* u8 */
TCA_FLOWER_KEY_CVLAN_ETH_TYPE, /* be16 */
TCA_FLOWER_KEY_ENC_IP_TOS, /* u8 */
TCA_FLOWER_KEY_ENC_IP_TOS_MASK, /* u8 */
TCA_FLOWER_KEY_ENC_IP_TTL, /* u8 */
TCA_FLOWER_KEY_ENC_IP_TTL_MASK, /* u8 */
TCA_FLOWER_KEY_ENC_OPTS,
TCA_FLOWER_KEY_ENC_OPTS_MASK,
__TCA_FLOWER_MAX,
};
#define TCA_FLOWER_MAX (__TCA_FLOWER_MAX - 1)
enum {
TCA_FLOWER_KEY_ENC_OPTS_UNSPEC,
TCA_FLOWER_KEY_ENC_OPTS_GENEVE, /* Nested
* TCA_FLOWER_KEY_ENC_OPT_GENEVE_
* attributes
*/
__TCA_FLOWER_KEY_ENC_OPTS_MAX,
};
#define TCA_FLOWER_KEY_ENC_OPTS_MAX (__TCA_FLOWER_KEY_ENC_OPTS_MAX - 1)
enum {
TCA_FLOWER_KEY_ENC_OPT_GENEVE_UNSPEC,
TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, /* u16 */
TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, /* u8 */
TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, /* 4 to 128 bytes */
__TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
};
#define TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX \
(__TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX - 1)
enum {
TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT = (1 << 0),
TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST = (1 << 1),
};
/* Match-all classifier */
enum {
TCA_MATCHALL_UNSPEC,
TCA_MATCHALL_CLASSID,
TCA_MATCHALL_ACT,
TCA_MATCHALL_FLAGS,
__TCA_MATCHALL_MAX,
};
#define TCA_MATCHALL_MAX (__TCA_MATCHALL_MAX - 1)
/* Extended Matches */
struct tcf_ematch_tree_hdr {
__u16 nmatches;
__u16 progid;
};
enum {
TCA_EMATCH_TREE_UNSPEC,
TCA_EMATCH_TREE_HDR,
TCA_EMATCH_TREE_LIST,
__TCA_EMATCH_TREE_MAX
};
#define TCA_EMATCH_TREE_MAX (__TCA_EMATCH_TREE_MAX - 1)
struct tcf_ematch_hdr {
__u16 matchid;
__u16 kind;
__u16 flags;
__u16 pad; /* currently unused */
};
/* 0 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
* +-----------------------+-+-+---+
* | Unused |S|I| R |
* +-----------------------+-+-+---+
*
* R(2) ::= relation to next ematch
* where: 0 0 END (last ematch)
* 0 1 AND
* 1 0 OR
* 1 1 Unused (invalid)
* I(1) ::= invert result
* S(1) ::= simple payload
*/
#define TCF_EM_REL_END 0
#define TCF_EM_REL_AND (1<<0)
#define TCF_EM_REL_OR (1<<1)
#define TCF_EM_INVERT (1<<2)
#define TCF_EM_SIMPLE (1<<3)
#define TCF_EM_REL_MASK 3
#define TCF_EM_REL_VALID(v) (((v) & TCF_EM_REL_MASK) != TCF_EM_REL_MASK)
enum {
TCF_LAYER_LINK,
TCF_LAYER_NETWORK,
TCF_LAYER_TRANSPORT,
__TCF_LAYER_MAX
};
#define TCF_LAYER_MAX (__TCF_LAYER_MAX - 1)
/* Ematch type assignments
* 1..32767 Reserved for ematches inside kernel tree
* 32768..65535 Free to use, not reliable
*/
#define TCF_EM_CONTAINER 0
#define TCF_EM_CMP 1
#define TCF_EM_NBYTE 2
#define TCF_EM_U32 3
#define TCF_EM_META 4
#define TCF_EM_TEXT 5
#define TCF_EM_VLAN 6
#define TCF_EM_CANID 7
#define TCF_EM_IPSET 8
#define TCF_EM_IPT 9
#define TCF_EM_MAX 9
enum {
TCF_EM_PROG_TC
};
enum {
TCF_EM_OPND_EQ,
TCF_EM_OPND_GT,
TCF_EM_OPND_LT
};
#endif
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