[mirror_ovs.git] / lib / meta-flow.h

/*
 * Copyright (c) 2011, 2012 Nicira, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef META_FLOW_H
#define META_FLOW_H 1

#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include "flow.h"
#include "ofp-errors.h"
#include "packets.h"

struct cls_rule;
struct ds;

/* The comment on each of these indicates the member in "union mf_value" used
 * to represent its value. */
enum mf_field_id {
    /* Metadata. */
    MFF_TUN_ID,                 /* be64 */
    MFF_IN_PORT,                /* be16 */

#if FLOW_N_REGS > 0
    MFF_REG0,                   /* be32 */
#endif
#if FLOW_N_REGS > 1
    MFF_REG1,                   /* be32 */
#endif
#if FLOW_N_REGS > 2
    MFF_REG2,                   /* be32 */
#endif
#if FLOW_N_REGS > 3
    MFF_REG3,                   /* be32 */
#endif
#if FLOW_N_REGS > 4
    MFF_REG4,                   /* be32 */
#endif
#if FLOW_N_REGS > 5
    MFF_REG5,                   /* be32 */
#endif
#if FLOW_N_REGS > 6
    MFF_REG6,                   /* be32 */
#endif
#if FLOW_N_REGS > 7
    MFF_REG7,                   /* be32 */
#endif
#if FLOW_N_REGS > 8
#error
#endif

    /* L2. */
    MFF_ETH_SRC,                /* mac */
    MFF_ETH_DST,                /* mac */
    MFF_ETH_TYPE,               /* be16 */

    MFF_VLAN_TCI,               /* be16 */
    MFF_VLAN_VID,               /* be16 */
    MFF_VLAN_PCP,               /* u8 */

    /* L3. */
    MFF_IPV4_SRC,               /* be32 */
    MFF_IPV4_DST,               /* be32 */

    MFF_IPV6_SRC,               /* ipv6 */
    MFF_IPV6_DST,               /* ipv6 */
    MFF_IPV6_LABEL,             /* be32 */

    MFF_IP_PROTO,               /* u8 (used for IPv4 or IPv6) */
    MFF_IP_DSCP,                /* u8 (used for IPv4 or IPv6) */
    MFF_IP_ECN,                 /* u8 (used for IPv4 or IPv6) */
    MFF_IP_TTL,                 /* u8 (used for IPv4 or IPv6) */
    MFF_IP_FRAG,                /* u8 (used for IPv4 or IPv6) */

    MFF_ARP_OP,                 /* be16 */
    MFF_ARP_SPA,                /* be32 */
    MFF_ARP_TPA,                /* be32 */
    MFF_ARP_SHA,                /* mac */
    MFF_ARP_THA,                /* mac */

    /* L4. */
    MFF_TCP_SRC,                /* be16 (used for IPv4 or IPv6) */
    MFF_TCP_DST,                /* be16 (used for IPv4 or IPv6) */

    MFF_UDP_SRC,                /* be16 (used for IPv4 or IPv6) */
    MFF_UDP_DST,                /* be16 (used for IPv4 or IPv6) */

    MFF_ICMPV4_TYPE,            /* u8 */
    MFF_ICMPV4_CODE,            /* u8 */

    MFF_ICMPV6_TYPE,            /* u8 */
    MFF_ICMPV6_CODE,            /* u8 */

    /* ICMPv6 Neighbor Discovery. */
    MFF_ND_TARGET,              /* ipv6 */
    MFF_ND_SLL,                 /* mac */
    MFF_ND_TLL,                 /* mac */

    MFF_N_IDS
};

/* Prerequisites for matching a field.
 *
 * A field may only be matched if the correct lower-level protocols are also
 * matched.  For example, the TCP port may be matched only if the Ethernet type
 * matches ETH_TYPE_IP and the IP protocol matches IPPROTO_TCP. */
enum mf_prereqs {
    MFP_NONE,

    /* L2 requirements. */
    MFP_ARP,
    MFP_IPV4,
    MFP_IPV6,
    MFP_IP_ANY,

    /* L2+L3 requirements. */
    MFP_TCP,                    /* On IPv4 or IPv6. */
    MFP_UDP,                    /* On IPv4 or IPv6. */
    MFP_ICMPV4,
    MFP_ICMPV6,

    /* L2+L3+L4 requirements. */
    MFP_ND,
    MFP_ND_SOLICIT,
    MFP_ND_ADVERT
};

/* Forms of partial-field masking allowed for a field.
 *
 * Every field may be masked as a whole. */
enum mf_maskable {
    MFM_NONE,                   /* No sub-field masking. */
    MFM_FULLY,                  /* Every bit is individually maskable. */
    MFM_CIDR,                   /* Contiguous low-order bits may be masked. */
    MFM_MCAST                   /* Byte 0, bit 0 is separately maskable. */
};

/* How to format or parse a field's value. */
enum mf_string {
    /* Integer formats.
     *
     * The particular MFS_* constant sets the output format.  On input, either
     * decimal or hexadecimal (prefixed with 0x) is accepted. */
    MFS_DECIMAL,
    MFS_HEXADECIMAL,

    /* Other formats. */
    MFS_ETHERNET,
    MFS_IPV4,
    MFS_IPV6,
    MFS_OFP_PORT,               /* An OpenFlow port number or name. */
    MFS_FRAG                    /* no, yes, first, later, not_later */
};

struct mf_field {
    /* Identification. */
    enum mf_field_id id;        /* MFF_*. */
    const char *name;           /* Name of this field, e.g. "eth_type". */
    const char *extra_name;     /* Alternate name, e.g. "dl_type", or NULL. */

    /* Size.
     *
     * Most fields have n_bytes * 8 == n_bits.  There are a few exceptions:
     *
     *     - "dl_vlan" is 2 bytes but only 12 bits.
     *     - "dl_vlan_pcp" is 1 byte but only 3 bits.
     *     - "is_frag" is 1 byte but only 2 bits.
     *     - "ipv6_label" is 4 bytes but only 20 bits.
     */
    unsigned int n_bytes;       /* Width of the field in bytes. */
    unsigned int n_bits;        /* Number of significant bits in field. */

    /* Properties. */
    enum mf_maskable maskable;
    flow_wildcards_t fww_bit;   /* Either 0 or exactly one FWW_* bit. */
    enum mf_string string;
    enum mf_prereqs prereqs;
    bool writable;              /* May be written by actions? */

    /* NXM properties.
     *
     * A few "mf_field"s don't correspond to NXM fields.  Those have 0 and
     * NULL for the following members, respectively. */
    uint32_t nxm_header;        /* An NXM_* constant (a few fields have 0). */
    const char *nxm_name;       /* The "NXM_*" constant's name. */

    /* OXM properties */
    uint32_t oxm_header;        /* Field id in the OXM basic class,
				 * an OXM_* constant.
				 * Ignored if oxm_name is NULL */
    const char *oxm_name;	/* The OXM_* constant's name,
				 * NULL if the field is not present
				 * in the OXM basic class */

};

/* The representation of a field's value. */
union mf_value {
    uint8_t u8;
    ovs_be16 be16;
    ovs_be32 be32;
    ovs_be64 be64;
    uint8_t mac[ETH_ADDR_LEN];
    struct in6_addr ipv6;
};
BUILD_ASSERT_DECL(sizeof(union mf_value) == 16);

/* Part of a field. */
struct mf_subfield {
    const struct mf_field *field;
    unsigned int ofs;           /* Bit offset. */
    unsigned int n_bits;        /* Number of bits. */
};

/* Data for some part of an mf_field.
 *
 * The data is stored "right-justified".  For example, if "union mf_subvalue
 * value" contains NXM_OF_VLAN_TCI[0..11], then one could access the
 * corresponding data in value.be16[7] as the bits in the mask htons(0xfff). */
union mf_subvalue {
    uint8_t u8[16];
    ovs_be16 be16[8];
    ovs_be32 be32[4];
    ovs_be64 be64[2];
};
BUILD_ASSERT_DECL(sizeof(union mf_value) == sizeof (union mf_subvalue));

/* Finding mf_fields. */
const struct mf_field *mf_from_id(enum mf_field_id);
const struct mf_field *mf_from_name(const char *name);
const struct mf_field *mf_from_nxm_header(uint32_t nxm_header);
const struct mf_field *mf_from_nxm_name(const char *nxm_name);

/* Inspecting wildcarded bits. */
bool mf_is_all_wild(const struct mf_field *, const struct flow_wildcards *);

bool mf_is_mask_valid(const struct mf_field *, const union mf_value *mask);
void mf_get_mask(const struct mf_field *, const struct flow_wildcards *,
                 union mf_value *mask);

/* Prerequisites. */
bool mf_are_prereqs_ok(const struct mf_field *, const struct flow *);
void mf_force_prereqs(const struct mf_field *, struct cls_rule *);

/* Field values. */
bool mf_is_value_valid(const struct mf_field *, const union mf_value *value);

void mf_get_value(const struct mf_field *, const struct flow *,
                  union mf_value *value);
void mf_set_value(const struct mf_field *, const union mf_value *value,
                  struct cls_rule *);
void mf_set_flow_value(const struct mf_field *, const union mf_value *value,
                       struct flow *);

void mf_get(const struct mf_field *, const struct cls_rule *,
            union mf_value *value, union mf_value *mask);
void mf_set(const struct mf_field *,
            const union mf_value *value, const union mf_value *mask,
            struct cls_rule *);

void mf_set_wild(const struct mf_field *, struct cls_rule *);

void mf_random_value(const struct mf_field *, union mf_value *value);

/* Subfields. */
void mf_write_subfield(const struct mf_subfield *, const union mf_subvalue *,
                       struct cls_rule *);
void mf_set_subfield(const struct mf_subfield *, uint64_t value,
                     struct cls_rule *);
void mf_set_subfield_value(const struct mf_subfield *, uint64_t value,
                           struct flow *);

void mf_read_subfield(const struct mf_subfield *, const struct flow *,
                      union mf_subvalue *);
uint64_t mf_get_subfield(const struct mf_subfield *, const struct flow *);


void mf_format_subfield(const struct mf_subfield *, struct ds *);
char *mf_parse_subfield__(struct mf_subfield *sf, const char **s);
const char *mf_parse_subfield(struct mf_subfield *, const char *);

enum ofperr mf_check_src(const struct mf_subfield *, const struct flow *);
enum ofperr mf_check_dst(const struct mf_subfield *, const struct flow *);

/* Parsing and formatting. */
char *mf_parse(const struct mf_field *, const char *,
               union mf_value *value, union mf_value *mask);
char *mf_parse_value(const struct mf_field *, const char *, union mf_value *);
void mf_format(const struct mf_field *,
               const union mf_value *value, const union mf_value *mask,
               struct ds *);

#endif /* meta-flow.h */
Commit	Line	Data
6a885fd0	1	/*
e0edde6f	2	* Copyright (c) 2011, 2012 Nicira, Inc.
6a885fd0 BP	3	*
	4	* Licensed under the Apache License, Version 2.0 (the "License");
	5	* you may not use this file except in compliance with the License.
	6	* You may obtain a copy of the License at:
	7	*
	8	* http://www.apache.org/licenses/LICENSE-2.0
	9	*
	10	* Unless required by applicable law or agreed to in writing, software
	11	* distributed under the License is distributed on an "AS IS" BASIS,
	12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	13	* See the License for the specific language governing permissions and
	14	* limitations under the License.
	15	*/
	16
	17	#ifndef META_FLOW_H
	18	#define META_FLOW_H 1
	19
6ca00f6f ETN	20	#include <sys/types.h>
6ca00f6f ETN	21	#include <netinet/in.h>
6a885fd0 BP	22	#include <netinet/ip6.h>
6a885fd0 BP	23	#include "flow.h"
816fd533	24	#include "ofp-errors.h"
6a885fd0 BP	25	#include "packets.h"
	26
	27	struct cls_rule;
	28	struct ds;
	29
	30	/* The comment on each of these indicates the member in "union mf_value" used
	31	* to represent its value. */
	32	enum mf_field_id {
	33	/* Metadata. */
	34	MFF_TUN_ID, /* be64 */
	35	MFF_IN_PORT, /* be16 */
	36
	37	#if FLOW_N_REGS > 0
	38	MFF_REG0, /* be32 */
	39	#endif
	40	#if FLOW_N_REGS > 1
	41	MFF_REG1, /* be32 */
	42	#endif
	43	#if FLOW_N_REGS > 2
	44	MFF_REG2, /* be32 */
	45	#endif
	46	#if FLOW_N_REGS > 3
	47	MFF_REG3, /* be32 */
	48	#endif
	49	#if FLOW_N_REGS > 4
d2c0fed9 JP	50	MFF_REG4, /* be32 */
	51	#endif
	52	#if FLOW_N_REGS > 5
e9358af6 EJ	53	MFF_REG5, /* be32 */
	54	#endif
	55	#if FLOW_N_REGS > 6
	56	MFF_REG6, /* be32 */
	57	#endif
	58	#if FLOW_N_REGS > 7
	59	MFF_REG7, /* be32 */
	60	#endif
	61	#if FLOW_N_REGS > 8
6a885fd0 BP	62	#error
	63	#endif
	64
	65	/* L2. */
	66	MFF_ETH_SRC, /* mac */
	67	MFF_ETH_DST, /* mac */
	68	MFF_ETH_TYPE, /* be16 */
	69
	70	MFF_VLAN_TCI, /* be16 */
	71	MFF_VLAN_VID, /* be16 */
	72	MFF_VLAN_PCP, /* u8 */
	73
	74	/* L3. */
	75	MFF_IPV4_SRC, /* be32 */
	76	MFF_IPV4_DST, /* be32 */
	77
	78	MFF_IPV6_SRC, /* ipv6 */
	79	MFF_IPV6_DST, /* ipv6 */
fa8223b7	80	MFF_IPV6_LABEL, /* be32 */
6a885fd0 BP	81
6a885fd0 BP	82	MFF_IP_PROTO, /* u8 (used for IPv4 or IPv6) */
530180fd JP	83	MFF_IP_DSCP, /* u8 (used for IPv4 or IPv6) */
530180fd JP	84	MFF_IP_ECN, /* u8 (used for IPv4 or IPv6) */
a61680c6	85	MFF_IP_TTL, /* u8 (used for IPv4 or IPv6) */
7257b535	86	MFF_IP_FRAG, /* u8 (used for IPv4 or IPv6) */
6a885fd0 BP	87
	88	MFF_ARP_OP, /* be16 */
	89	MFF_ARP_SPA, /* be32 */
	90	MFF_ARP_TPA, /* be32 */
	91	MFF_ARP_SHA, /* mac */
	92	MFF_ARP_THA, /* mac */
	93
	94	/* L4. */
	95	MFF_TCP_SRC, /* be16 (used for IPv4 or IPv6) */
	96	MFF_TCP_DST, /* be16 (used for IPv4 or IPv6) */
	97
	98	MFF_UDP_SRC, /* be16 (used for IPv4 or IPv6) */
	99	MFF_UDP_DST, /* be16 (used for IPv4 or IPv6) */
	100
268a95e0 BP	101	MFF_ICMPV4_TYPE, /* u8 */
	102	MFF_ICMPV4_CODE, /* u8 */
	103
	104	MFF_ICMPV6_TYPE, /* u8 */
	105	MFF_ICMPV6_CODE, /* u8 */
6a885fd0 BP	106
	107	/* ICMPv6 Neighbor Discovery. */
	108	MFF_ND_TARGET, /* ipv6 */
	109	MFF_ND_SLL, /* mac */
	110	MFF_ND_TLL, /* mac */
	111
	112	MFF_N_IDS
	113	};
	114
	115	/* Prerequisites for matching a field.
	116	*
	117	* A field may only be matched if the correct lower-level protocols are also
	118	* matched. For example, the TCP port may be matched only if the Ethernet type
	119	* matches ETH_TYPE_IP and the IP protocol matches IPPROTO_TCP. */
	120	enum mf_prereqs {
	121	MFP_NONE,
	122
	123	/* L2 requirements. */
	124	MFP_ARP,
	125	MFP_IPV4,
	126	MFP_IPV6,
	127	MFP_IP_ANY,
	128
	129	/* L2+L3 requirements. */
	130	MFP_TCP, /* On IPv4 or IPv6. */
	131	MFP_UDP, /* On IPv4 or IPv6. */
268a95e0	132	MFP_ICMPV4,
6a885fd0	133	MFP_ICMPV6,
6a885fd0 BP	134
	135	/* L2+L3+L4 requirements. */
	136	MFP_ND,
	137	MFP_ND_SOLICIT,
	138	MFP_ND_ADVERT
	139	};
	140
	141	/* Forms of partial-field masking allowed for a field.
	142	*
	143	* Every field may be masked as a whole. */
	144	enum mf_maskable {
	145	MFM_NONE, /* No sub-field masking. */
	146	MFM_FULLY, /* Every bit is individually maskable. */
	147	MFM_CIDR, /* Contiguous low-order bits may be masked. */
	148	MFM_MCAST /* Byte 0, bit 0 is separately maskable. */
	149	};
	150
	151	/* How to format or parse a field's value. */
	152	enum mf_string {
	153	/* Integer formats.
	154	*
	155	* The particular MFS_* constant sets the output format. On input, either
	156	* decimal or hexadecimal (prefixed with 0x) is accepted. */
	157	MFS_DECIMAL,
	158	MFS_HEXADECIMAL,
	159
	160	/* Other formats. */
	161	MFS_ETHERNET,
	162	MFS_IPV4,
	163	MFS_IPV6,
7257b535 BP	164	MFS_OFP_PORT, /* An OpenFlow port number or name. */
7257b535 BP	165	MFS_FRAG /* no, yes, first, later, not_later */
6a885fd0 BP	166	};
	167
	168	struct mf_field {
	169	/* Identification. */
	170	enum mf_field_id id; /* MFF_. /
	171	const char name; / Name of this field, e.g. "eth_type". */
	172	const char extra_name; / Alternate name, e.g. "dl_type", or NULL. */
	173
	174	/* Size.
	175	*
9df6a679 JP	176	* Most fields have n_bytes * 8 == n_bits. There are a few exceptions:
	177	*
	178	* - "dl_vlan" is 2 bytes but only 12 bits.
	179	* - "dl_vlan_pcp" is 1 byte but only 3 bits.
	180	* - "is_frag" is 1 byte but only 2 bits.
fa8223b7	181	* - "ipv6_label" is 4 bytes but only 20 bits.
9df6a679	182	*/
6a885fd0 BP	183	unsigned int n_bytes; /* Width of the field in bytes. */
	184	unsigned int n_bits; /* Number of significant bits in field. */
	185
	186	/* Properties. */
	187	enum mf_maskable maskable;
	188	flow_wildcards_t fww_bit; /* Either 0 or exactly one FWW_* bit. */
	189	enum mf_string string;
	190	enum mf_prereqs prereqs;
28da1f8f BP	191	bool writable; /* May be written by actions? */
	192
	193	/* NXM properties.
	194	*
	195	* A few "mf_field"s don't correspond to NXM fields. Those have 0 and
	196	* NULL for the following members, respectively. */
6a885fd0	197	uint32_t nxm_header; /* An NXM_* constant (a few fields have 0). */
28da1f8f	198	const char nxm_name; / The "NXM_" constant's name. /
36f3999b SH	199
	200	/* OXM properties */
	201	uint32_t oxm_header; /* Field id in the OXM basic class,
	202	* an OXM_* constant.
	203	* Ignored if oxm_name is NULL */
	204	const char oxm_name; / The OXM_* constant's name,
	205	* NULL if the field is not present
	206	* in the OXM basic class */
	207
6a885fd0 BP	208	};
	209
	210	/* The representation of a field's value. */
	211	union mf_value {
	212	uint8_t u8;
	213	ovs_be16 be16;
	214	ovs_be32 be32;
	215	ovs_be64 be64;
	216	uint8_t mac[ETH_ADDR_LEN];
	217	struct in6_addr ipv6;
	218	};
1b35df45	219	BUILD_ASSERT_DECL(sizeof(union mf_value) == 16);
6a885fd0	220
816fd533 BP	221	/* Part of a field. */
	222	struct mf_subfield {
	223	const struct mf_field *field;
	224	unsigned int ofs; /* Bit offset. */
	225	unsigned int n_bits; /* Number of bits. */
	226	};
	227
1b35df45 BP	228	/* Data for some part of an mf_field.
	229	*
	230	* The data is stored "right-justified". For example, if "union mf_subvalue
	231	* value" contains NXM_OF_VLAN_TCI[0..11], then one could access the
	232	* corresponding data in value.be16[7] as the bits in the mask htons(0xfff). */
	233	union mf_subvalue {
	234	uint8_t u8[16];
	235	ovs_be16 be16[8];
	236	ovs_be32 be32[4];
	237	ovs_be64 be64[2];
	238	};
	239	BUILD_ASSERT_DECL(sizeof(union mf_value) == sizeof (union mf_subvalue));
	240
6a885fd0 BP	241	/* Finding mf_fields. */
	242	const struct mf_field *mf_from_id(enum mf_field_id);
	243	const struct mf_field mf_from_name(const char name);
28da1f8f BP	244	const struct mf_field *mf_from_nxm_header(uint32_t nxm_header);
28da1f8f BP	245	const struct mf_field mf_from_nxm_name(const char nxm_name);
6a885fd0 BP	246
	247	/* Inspecting wildcarded bits. */
	248	bool mf_is_all_wild(const struct mf_field , const struct flow_wildcards );
	249
	250	bool mf_is_mask_valid(const struct mf_field , const union mf_value mask);
	251	void mf_get_mask(const struct mf_field , const struct flow_wildcards ,
	252	union mf_value *mask);
	253
	254	/* Prerequisites. */
	255	bool mf_are_prereqs_ok(const struct mf_field , const struct flow );
	256	void mf_force_prereqs(const struct mf_field , struct cls_rule );
	257
	258	/* Field values. */
	259	bool mf_is_value_valid(const struct mf_field , const union mf_value value);
	260
	261	void mf_get_value(const struct mf_field , const struct flow ,
	262	union mf_value *value);
	263	void mf_set_value(const struct mf_field , const union mf_value value,
	264	struct cls_rule *);
28da1f8f BP	265	void mf_set_flow_value(const struct mf_field , const union mf_value value,
28da1f8f BP	266	struct flow *);
6a885fd0 BP	267
	268	void mf_get(const struct mf_field , const struct cls_rule ,
	269	union mf_value value, union mf_value mask);
	270	void mf_set(const struct mf_field *,
	271	const union mf_value value, const union mf_value mask,
	272	struct cls_rule *);
6a885fd0 BP	273
	274	void mf_set_wild(const struct mf_field , struct cls_rule );
	275
	276	void mf_random_value(const struct mf_field , union mf_value value);
	277
816fd533	278	/* Subfields. */
1b35df45 BP	279	void mf_write_subfield(const struct mf_subfield , const union mf_subvalue ,
1b35df45 BP	280	struct cls_rule *);
816fd533 BP	281	void mf_set_subfield(const struct mf_subfield *, uint64_t value,
	282	struct cls_rule *);
	283	void mf_set_subfield_value(const struct mf_subfield *, uint64_t value,
	284	struct flow *);
1b35df45 BP	285
	286	void mf_read_subfield(const struct mf_subfield , const struct flow ,
	287	union mf_subvalue *);
816fd533 BP	288	uint64_t mf_get_subfield(const struct mf_subfield , const struct flow );
816fd533 BP	289
1b35df45	290
816fd533 BP	291	void mf_format_subfield(const struct mf_subfield , struct ds );
	292	char mf_parse_subfield__(struct mf_subfield sf, const char **s);
	293	const char mf_parse_subfield(struct mf_subfield , const char *);
	294
	295	enum ofperr mf_check_src(const struct mf_subfield , const struct flow );
	296	enum ofperr mf_check_dst(const struct mf_subfield , const struct flow );
	297
6a885fd0 BP	298	/* Parsing and formatting. */
	299	char mf_parse(const struct mf_field , const char *,
	300	union mf_value value, union mf_value mask);
	301	char mf_parse_value(const struct mf_field , const char , union mf_value );
	302	void mf_format(const struct mf_field *,
	303	const union mf_value value, const union mf_value mask,
	304	struct ds *);
	305
	306	#endif /* meta-flow.h */