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mbuf.h (254799) mbuf.h (254804)
1/*-
2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)mbuf.h 8.5 (Berkeley) 2/19/95
1/*-
2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)mbuf.h 8.5 (Berkeley) 2/19/95
31 * $FreeBSD: head/sys/sys/mbuf.h 254799 2013-08-24 16:57:44Z andre $
31 * $FreeBSD: head/sys/sys/mbuf.h 254804 2013-08-24 19:51:18Z andre $
32 */
33
34#ifndef _SYS_MBUF_H_
35#define _SYS_MBUF_H_
36
37/* XXX: These includes suck. Sorry! */
38#include <sys/queue.h>
39#ifdef _KERNEL

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107 u_int16_t m_tag_id; /* Tag ID */
108 u_int16_t m_tag_len; /* Length of data */
109 u_int32_t m_tag_cookie; /* ABI/Module ID */
110 void (*m_tag_free)(struct m_tag *);
111};
112
113/*
114 * Record/packet header in first mbuf of chain; valid only if M_PKTHDR is set.
32 */
33
34#ifndef _SYS_MBUF_H_
35#define _SYS_MBUF_H_
36
37/* XXX: These includes suck. Sorry! */
38#include <sys/queue.h>
39#ifdef _KERNEL

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107 u_int16_t m_tag_id; /* Tag ID */
108 u_int16_t m_tag_len; /* Length of data */
109 u_int32_t m_tag_cookie; /* ABI/Module ID */
110 void (*m_tag_free)(struct m_tag *);
111};
112
113/*
114 * Record/packet header in first mbuf of chain; valid only if M_PKTHDR is set.
115 * Size ILP32: 48
116 * LP64: 56
115 */
116struct pkthdr {
117 struct ifnet *rcvif; /* rcv interface */
117 */
118struct pkthdr {
119 struct ifnet *rcvif; /* rcv interface */
118 /* variables for ip and tcp reassembly */
119 void *header; /* pointer to packet header */
120 int len; /* total packet length */
121 uint32_t flowid; /* packet's 4-tuple system
122 * flow identifier
123 */
124 /* variables for hardware checksum */
125 int csum_flags; /* flags regarding checksum */
126 int csum_data; /* data field used by csum routines */
127 u_int16_t tso_segsz; /* TSO segment size */
128 union {
129 u_int16_t vt_vtag; /* Ethernet 802.1p+q vlan tag */
130 u_int16_t vt_nrecs; /* # of IGMPv3 records in this chain */
131 } PH_vt;
132 u_int16_t fibnum; /* this packet should use this fib */
133 u_int16_t pad2; /* align to 32 bits */
134 SLIST_HEAD(packet_tags, m_tag) tags; /* list of packet tags */
120 SLIST_HEAD(packet_tags, m_tag) tags; /* list of packet tags */
121 int32_t len; /* total packet length */
122
123 /* Layer crossing persistent information. */
124 uint32_t flowid; /* packet's 4-tuple system */
125 uint64_t csum_flags; /* checksum and offload features */
126 uint16_t fibnum; /* this packet should use this fib */
127 uint8_t cosqos; /* class/quality of service */
128 uint8_t rsstype; /* hash type */
129 uint8_t l2hlen; /* layer 2 header length */
130 uint8_t l3hlen; /* layer 3 header length */
131 uint8_t l4hlen; /* layer 4 header length */
132 uint8_t l5hlen; /* layer 5 header length */
133 union {
134 uint8_t eigth[8];
135 uint16_t sixteen[4];
136 uint32_t thirtytwo[2];
137 uint64_t sixtyfour[1];
138 uintptr_t unintptr[1];
139 void *ptr;
140 } PH_per;
141
142 /* Layer specific non-persistent local storage for reassembly, etc. */
143 union {
144 uint8_t eigth[8];
145 uint16_t sixteen[4];
146 uint32_t thirtytwo[2];
147 uint64_t sixtyfour[1];
148 uintptr_t unintptr[1];
149 void *ptr;
150 } PH_loc;
135};
151};
136#define ether_vtag PH_vt.vt_vtag
152#define ether_vtag PH_per.sixteen[0]
153#define PH_vt PH_per
154#define vt_nrecs sixteen[0]
155#define tso_segsz PH_per.sixteen[1]
156#define csum_phsum PH_per.sixteen[2]
157#define csum_data PH_per.thirtytwo[1]
137
138/*
139 * Description of external storage mapped into mbuf; valid only if M_EXT is
140 * set.
141 * Size ILP32: 28
142 * LP64: 48
143 */
144struct m_ext {

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204#define M_PROTO6 0x00020000 /* protocol-specific */
205#define M_PROTO7 0x00040000 /* protocol-specific */
206#define M_PROTO8 0x00080000 /* protocol-specific */
207#define M_PROTO9 0x00100000 /* protocol-specific */
208#define M_PROTO10 0x00200000 /* protocol-specific */
209#define M_PROTO11 0x00400000 /* protocol-specific */
210#define M_PROTO12 0x00800000 /* protocol-specific */
211
158
159/*
160 * Description of external storage mapped into mbuf; valid only if M_EXT is
161 * set.
162 * Size ILP32: 28
163 * LP64: 48
164 */
165struct m_ext {

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225#define M_PROTO6 0x00020000 /* protocol-specific */
226#define M_PROTO7 0x00040000 /* protocol-specific */
227#define M_PROTO8 0x00080000 /* protocol-specific */
228#define M_PROTO9 0x00100000 /* protocol-specific */
229#define M_PROTO10 0x00200000 /* protocol-specific */
230#define M_PROTO11 0x00400000 /* protocol-specific */
231#define M_PROTO12 0x00800000 /* protocol-specific */
232
212#define M_HASHTYPEBITS 0x0F000000 /* mask of bits holding flowid hash type */
213
214/*
215 * Flags to purge when crossing layers.
216 */
217#define M_PROTOFLAGS \
218 (M_PROTO1|M_PROTO2|M_PROTO3|M_PROTO4|M_PROTO5|M_PROTO6|M_PROTO7|M_PROTO8|\
219 M_PROTO9|M_PROTO10|M_PROTO11|M_PROTO12)
220
221/*
233/*
234 * Flags to purge when crossing layers.
235 */
236#define M_PROTOFLAGS \
237 (M_PROTO1|M_PROTO2|M_PROTO3|M_PROTO4|M_PROTO5|M_PROTO6|M_PROTO7|M_PROTO8|\
238 M_PROTO9|M_PROTO10|M_PROTO11|M_PROTO12)
239
240/*
241 * Flags preserved when copying m_pkthdr.
242 */
243#define M_COPYFLAGS \
244 (M_PKTHDR|M_EOR|M_RDONLY|M_BCAST|M_MCAST|M_VLANTAG|M_PROMISC| \
245 M_PROTOFLAGS)
246
247/*
222 * Mbuf flag description for use with printf(9) %b identifier.
223 */
224#define M_FLAG_BITS \
225 "\20\1M_EXT\2M_PKTHDR\3M_EOR\4M_RDONLY\5M_BCAST\6M_MCAST" \
226 "\7M_PROMISC\10M_VLANTAG\11M_FLOWID"
227#define M_FLAG_PROTOBITS \
228 "\15M_PROTO1\16M_PROTO2\17M_PROTO3\20M_PROTO4\21M_PROTO5" \
229 "\22M_PROTO6\23M_PROTO7\24M_PROTO8\25M_PROTO9\26M_PROTO10" \

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240 * network stack.
241 *
242 * Most NICs support RSS, which provides ordering and explicit affinity, and
243 * use the hash m_flag bits to indicate what header fields were covered by
244 * the hash. M_HASHTYPE_OPAQUE can be set by non-RSS cards or configurations
245 * that provide an opaque flow identifier, allowing for ordering and
246 * distribution without explicit affinity.
247 */
248 * Mbuf flag description for use with printf(9) %b identifier.
249 */
250#define M_FLAG_BITS \
251 "\20\1M_EXT\2M_PKTHDR\3M_EOR\4M_RDONLY\5M_BCAST\6M_MCAST" \
252 "\7M_PROMISC\10M_VLANTAG\11M_FLOWID"
253#define M_FLAG_PROTOBITS \
254 "\15M_PROTO1\16M_PROTO2\17M_PROTO3\20M_PROTO4\21M_PROTO5" \
255 "\22M_PROTO6\23M_PROTO7\24M_PROTO8\25M_PROTO9\26M_PROTO10" \

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266 * network stack.
267 *
268 * Most NICs support RSS, which provides ordering and explicit affinity, and
269 * use the hash m_flag bits to indicate what header fields were covered by
270 * the hash. M_HASHTYPE_OPAQUE can be set by non-RSS cards or configurations
271 * that provide an opaque flow identifier, allowing for ordering and
272 * distribution without explicit affinity.
273 */
248#define M_HASHTYPE_SHIFT 24
249#define M_HASHTYPE_NONE 0x0
250#define M_HASHTYPE_RSS_IPV4 0x1 /* IPv4 2-tuple */
251#define M_HASHTYPE_RSS_TCP_IPV4 0x2 /* TCPv4 4-tuple */
252#define M_HASHTYPE_RSS_IPV6 0x3 /* IPv6 2-tuple */
253#define M_HASHTYPE_RSS_TCP_IPV6 0x4 /* TCPv6 4-tuple */
254#define M_HASHTYPE_RSS_IPV6_EX 0x5 /* IPv6 2-tuple + ext hdrs */
255#define M_HASHTYPE_RSS_TCP_IPV6_EX 0x6 /* TCPv6 4-tiple + ext hdrs */
256#define M_HASHTYPE_OPAQUE 0xf /* ordering, not affinity */
274#define M_HASHTYPE_NONE 0
275#define M_HASHTYPE_RSS_IPV4 1 /* IPv4 2-tuple */
276#define M_HASHTYPE_RSS_TCP_IPV4 2 /* TCPv4 4-tuple */
277#define M_HASHTYPE_RSS_IPV6 3 /* IPv6 2-tuple */
278#define M_HASHTYPE_RSS_TCP_IPV6 4 /* TCPv6 4-tuple */
279#define M_HASHTYPE_RSS_IPV6_EX 5 /* IPv6 2-tuple + ext hdrs */
280#define M_HASHTYPE_RSS_TCP_IPV6_EX 6 /* TCPv6 4-tiple + ext hdrs */
281#define M_HASHTYPE_OPAQUE 255 /* ordering, not affinity */
257
282
258#define M_HASHTYPE_CLEAR(m) (m)->m_flags &= ~(M_HASHTYPEBITS)
259#define M_HASHTYPE_GET(m) (((m)->m_flags & M_HASHTYPEBITS) >> \
260 M_HASHTYPE_SHIFT)
261#define M_HASHTYPE_SET(m, v) do { \
262 (m)->m_flags &= ~M_HASHTYPEBITS; \
263 (m)->m_flags |= ((v) << M_HASHTYPE_SHIFT); \
264} while (0)
283#define M_HASHTYPE_CLEAR(m) ((m)->m_pkthdr.rsstype = 0)
284#define M_HASHTYPE_GET(m) ((m)->m_pkthdr.rsstype)
285#define M_HASHTYPE_SET(m, v) ((m)->m_pkthdr.rsstype = (v))
265#define M_HASHTYPE_TEST(m, v) (M_HASHTYPE_GET(m) == (v))
266
267/*
286#define M_HASHTYPE_TEST(m, v) (M_HASHTYPE_GET(m) == (v))
287
288/*
268 * Flags preserved when copying m_pkthdr.
289 * COS/QOS class and quality of service tags.
290 * It uses DSCP code points as base.
269 */
291 */
270#define M_COPYFLAGS \
271 (M_PKTHDR|M_EOR|M_RDONLY|M_BCAST|M_MCAST|M_VLANTAG|M_PROMISC| \
272 M_PROTOFLAGS|M_HASHTYPEBITS)
292#define QOS_DSCP_CS0 0x00
293#define QOS_DSCP_DEF QOS_DSCP_CS0
294#define QOS_DSCP_CS1 0x20
295#define QOS_DSCP_AF11 0x28
296#define QOS_DSCP_AF12 0x30
297#define QOS_DSCP_AF13 0x38
298#define QOS_DSCP_CS2 0x40
299#define QOS_DSCP_AF21 0x48
300#define QOS_DSCP_AF22 0x50
301#define QOS_DSCP_AF23 0x58
302#define QOS_DSCP_CS3 0x60
303#define QOS_DSCP_AF31 0x68
304#define QOS_DSCP_AF32 0x70
305#define QOS_DSCP_AF33 0x78
306#define QOS_DSCP_CS4 0x80
307#define QOS_DSCP_AF41 0x88
308#define QOS_DSCP_AF42 0x90
309#define QOS_DSCP_AF43 0x98
310#define QOS_DSCP_CS5 0xa0
311#define QOS_DSCP_EF 0xb8
312#define QOS_DSCP_CS6 0xc0
313#define QOS_DSCP_CS7 0xe0
273
274/*
275 * External mbuf storage buffer types.
276 */
277#define EXT_CLUSTER 1 /* mbuf cluster */
278#define EXT_SFBUF 2 /* sendfile(2)'s sf_bufs */
279#define EXT_JUMBOP 3 /* jumbo cluster 4096 bytes */
280#define EXT_JUMBO9 4 /* jumbo cluster 9216 bytes */

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320 */
321#define EXT_FLAG_BITS \
322 "\20\1EXT_FLAG_EMBREF\2EXT_FLAG_EXTREF\5EXT_FLAG_NOFREE" \
323 "\21EXT_FLAG_VENDOR1\22EXT_FLAG_VENDOR2\23EXT_FLAG_VENDOR3" \
324 "\24EXT_FLAG_VENDOR4\25EXT_FLAG_EXP1\26EXT_FLAG_EXP2\27EXT_FLAG_EXP3" \
325 "\30EXT_FLAG_EXP4"
326
327/*
314
315/*
316 * External mbuf storage buffer types.
317 */
318#define EXT_CLUSTER 1 /* mbuf cluster */
319#define EXT_SFBUF 2 /* sendfile(2)'s sf_bufs */
320#define EXT_JUMBOP 3 /* jumbo cluster 4096 bytes */
321#define EXT_JUMBO9 4 /* jumbo cluster 9216 bytes */

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361 */
362#define EXT_FLAG_BITS \
363 "\20\1EXT_FLAG_EMBREF\2EXT_FLAG_EXTREF\5EXT_FLAG_NOFREE" \
364 "\21EXT_FLAG_VENDOR1\22EXT_FLAG_VENDOR2\23EXT_FLAG_VENDOR3" \
365 "\24EXT_FLAG_VENDOR4\25EXT_FLAG_EXP1\26EXT_FLAG_EXP2\27EXT_FLAG_EXP3" \
366 "\30EXT_FLAG_EXP4"
367
368/*
328 * Flags indicating hw checksum support and sw checksum requirements. This
329 * field can be directly tested against if_data.ifi_hwassist.
369 * Flags indicating checksum, segmentation and other offload work to be
370 * done, or already done, by hardware or lower layers. It is split into
371 * separate inbound and outbound flags.
372 *
373 * Outbound flags that are set by upper protocol layers requesting lower
374 * layers, or ideally the hardware, to perform these offloading tasks.
375 * For outbound packets this field and its flags can be directly tested
376 * against if_data.ifi_hwassist.
330 */
377 */
331#define CSUM_IP 0x0001 /* will csum IP */
332#define CSUM_TCP 0x0002 /* will csum TCP */
333#define CSUM_UDP 0x0004 /* will csum UDP */
334#define CSUM_FRAGMENT 0x0010 /* will do IP fragmentation */
335#define CSUM_TSO 0x0020 /* will do TSO */
336#define CSUM_SCTP 0x0040 /* will csum SCTP */
337#define CSUM_SCTP_IPV6 0x0080 /* will csum IPv6/SCTP */
378#define CSUM_IP 0x00000001 /* IP header checksum offload */
379#define CSUM_IP_UDP 0x00000002 /* UDP checksum offload */
380#define CSUM_IP_TCP 0x00000004 /* TCP checksum offload */
381#define CSUM_IP_SCTP 0x00000008 /* SCTP checksum offload */
382#define CSUM_IP_TSO 0x00000010 /* TCP segmentation offload */
383#define CSUM_IP_ISCSI 0x00000020 /* iSCSI checksum offload */
338
384
339#define CSUM_IP_CHECKED 0x0100 /* did csum IP */
340#define CSUM_IP_VALID 0x0200 /* ... the csum is valid */
341#define CSUM_DATA_VALID 0x0400 /* csum_data field is valid */
342#define CSUM_PSEUDO_HDR 0x0800 /* csum_data has pseudo hdr */
343#define CSUM_SCTP_VALID 0x1000 /* SCTP checksum is valid */
344#define CSUM_UDP_IPV6 0x2000 /* will csum IPv6/UDP */
345#define CSUM_TCP_IPV6 0x4000 /* will csum IPv6/TCP */
346/* CSUM_TSO_IPV6 0x8000 will do IPv6/TSO */
385#define CSUM_IP6_UDP 0x00000200 /* UDP checksum offload */
386#define CSUM_IP6_TCP 0x00000400 /* TCP checksum offload */
387#define CSUM_IP6_SCTP 0x00000800 /* SCTP checksum offload */
388#define CSUM_IP6_TSO 0x00001000 /* TCP segmentation offload */
389#define CSUM_IP6_ISCSI 0x00002000 /* iSCSI checksum offload */
347
390
348/* CSUM_FRAGMENT_IPV6 0x10000 will do IPv6 fragementation */
391/* Inbound checksum support where the checksum was verified by hardware. */
392#define CSUM_L3_CALC 0x01000000 /* calculated layer 3 csum */
393#define CSUM_L3_VALID 0x02000000 /* checksum is correct */
394#define CSUM_L4_CALC 0x04000000 /* calculated layer 4 csum */
395#define CSUM_L4_VALID 0x08000000 /* checksum is correct */
396#define CSUM_L5_CALC 0x10000000 /* calculated layer 5 csum */
397#define CSUM_L5_VALID 0x20000000 /* checksum is correct */
398#define CSUM_COALESED 0x40000000 /* contains merged segments */
349
399
350#define CSUM_DELAY_DATA_IPV6 (CSUM_TCP_IPV6 | CSUM_UDP_IPV6)
400/*
401 * CSUM flag description for use with printf(9) %b identifier.
402 */
403#define CSUM_BITS \
404 "\20\1CSUM_IP\2CSUM_IP_UDP\3CSUM_IP_TCP\4CSUM_IP_SCTP\5CSUM_IP_TSO" \
405 "\6CSUM_IP_ISCSI" \
406 "\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP\15CSUM_IP6_TSO" \
407 "\16CSUM_IP6_ISCSI" \
408 "\31CSUM_L3_CALC\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID" \
409 "\35CSUM_L5_CALC\36CSUM_L5_VALID\37CSUM_COALESED"
410
411/* CSUM flags compatibility mappings. */
412#define CSUM_IP_CHECKED CSUM_L3_CALC
413#define CSUM_IP_VALID CSUM_L3_VALID
414#define CSUM_DATA_VALID CSUM_L4_VALID
415#define CSUM_PSEUDO_HDR CSUM_L4_CALC
416#define CSUM_SCTP_VALID CSUM_L3_VALID
417#define CSUM_DELAY_DATA (CSUM_TCP|CSUM_UDP)
418#define CSUM_DELAY_IP CSUM_IP /* Only v4, no v6 IP hdr csum */
419#define CSUM_DELAY_DATA_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6)
351#define CSUM_DATA_VALID_IPV6 CSUM_DATA_VALID
420#define CSUM_DATA_VALID_IPV6 CSUM_DATA_VALID
421#define CSUM_TCP CSUM_IP_TCP
422#define CSUM_UDP CSUM_IP_UDP
423#define CSUM_SCTP CSUM_IP_SCTP
424#define CSUM_TSO (CSUM_IP_TSO|CSUM_IP6_TSO)
425#define CSUM_UDP_IPV6 CSUM_IP6_UDP
426#define CSUM_TCP_IPV6 CSUM_IP6_TCP
427#define CSUM_SCTP_IPV6 CSUM_IP6_SCTP
428#define CSUM_FRAGMENT 0x0 /* Unused */
352
429
353#define CSUM_DELAY_DATA (CSUM_TCP | CSUM_UDP)
354#define CSUM_DELAY_IP (CSUM_IP) /* Only v4, no v6 IP hdr csum */
355
356/*
357 * mbuf types.
358 */
359#define MT_NOTMBUF 0 /* USED INTERNALLY ONLY! Object is not mbuf */
360#define MT_DATA 1 /* dynamic (data) allocation */
361#define MT_HEADER MT_DATA /* packet header, use M_PKTHDR instead */
362#define MT_SONAME 8 /* socket name */
363#define MT_CONTROL 14 /* extra-data protocol message */

--- 703 unchanged lines hidden --- 		430/*
431 * mbuf types.
432 */
433#define MT_NOTMBUF 0 /* USED INTERNALLY ONLY! Object is not mbuf */
434#define MT_DATA 1 /* dynamic (data) allocation */
435#define MT_HEADER MT_DATA /* packet header, use M_PKTHDR instead */
436#define MT_SONAME 8 /* socket name */
437#define MT_CONTROL 14 /* extra-data protocol message */

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