1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1988, 1993 5 * The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)mbuf.h 8.5 (Berkeley) 2/19/95 33 * $FreeBSD$ 34 */ 35 36 #ifndef _SYS_MBUF_H_ 37 #define _SYS_MBUF_H_ 38 39 /* XXX: These includes suck. Sorry! */ 40 #include <sys/queue.h> 41 #ifdef _KERNEL 42 #include <sys/systm.h> 43 #include <sys/refcount.h> 44 #include <vm/uma.h> 45 #ifdef WITNESS 46 #include <sys/lock.h> 47 #endif 48 #endif 49 50 #ifdef _KERNEL 51 #include <sys/sdt.h> 52 53 #define MBUF_PROBE1(probe, arg0) \ 54 SDT_PROBE1(sdt, , , probe, arg0) 55 #define MBUF_PROBE2(probe, arg0, arg1) \ 56 SDT_PROBE2(sdt, , , probe, arg0, arg1) 57 #define MBUF_PROBE3(probe, arg0, arg1, arg2) \ 58 SDT_PROBE3(sdt, , , probe, arg0, arg1, arg2) 59 #define MBUF_PROBE4(probe, arg0, arg1, arg2, arg3) \ 60 SDT_PROBE4(sdt, , , probe, arg0, arg1, arg2, arg3) 61 #define MBUF_PROBE5(probe, arg0, arg1, arg2, arg3, arg4) \ 62 SDT_PROBE5(sdt, , , probe, arg0, arg1, arg2, arg3, arg4) 63 64 SDT_PROBE_DECLARE(sdt, , , m__init); 65 SDT_PROBE_DECLARE(sdt, , , m__gethdr); 66 SDT_PROBE_DECLARE(sdt, , , m__get); 67 SDT_PROBE_DECLARE(sdt, , , m__getcl); 68 SDT_PROBE_DECLARE(sdt, , , m__getjcl); 69 SDT_PROBE_DECLARE(sdt, , , m__clget); 70 SDT_PROBE_DECLARE(sdt, , , m__cljget); 71 SDT_PROBE_DECLARE(sdt, , , m__cljset); 72 SDT_PROBE_DECLARE(sdt, , , m__free); 73 SDT_PROBE_DECLARE(sdt, , , m__freem); 74 75 #endif /* _KERNEL */ 76 77 /* 78 * Mbufs are of a single size, MSIZE (sys/param.h), which includes overhead. 79 * An mbuf may add a single "mbuf cluster" of size MCLBYTES (also in 80 * sys/param.h), which has no additional overhead and is used instead of the 81 * internal data area; this is done when at least MINCLSIZE of data must be 82 * stored. Additionally, it is possible to allocate a separate buffer 83 * externally and attach it to the mbuf in a way similar to that of mbuf 84 * clusters. 85 * 86 * NB: These calculation do not take actual compiler-induced alignment and 87 * padding inside the complete struct mbuf into account. Appropriate 88 * attention is required when changing members of struct mbuf. 89 * 90 * MLEN is data length in a normal mbuf. 91 * MHLEN is data length in an mbuf with pktheader. 92 * MINCLSIZE is a smallest amount of data that should be put into cluster. 93 * 94 * Compile-time assertions in uipc_mbuf.c test these values to ensure that 95 * they are sensible. 96 */ 97 struct mbuf; 98 #define MHSIZE offsetof(struct mbuf, m_dat) 99 #define MPKTHSIZE offsetof(struct mbuf, m_pktdat) 100 #define MLEN ((int)(MSIZE - MHSIZE)) 101 #define MHLEN ((int)(MSIZE - MPKTHSIZE)) 102 #define MINCLSIZE (MHLEN + 1) 103 #define M_NODOM 255 104 105 #ifdef _KERNEL 106 /*- 107 * Macro for type conversion: convert mbuf pointer to data pointer of correct 108 * type: 109 * 110 * mtod(m, t) -- Convert mbuf pointer to data pointer of correct type. 111 * mtodo(m, o) -- Same as above but with offset 'o' into data. 112 */ 113 #define mtod(m, t) ((t)((m)->m_data)) 114 #define mtodo(m, o) ((void *)(((m)->m_data) + (o))) 115 116 /* 117 * Argument structure passed to UMA routines during mbuf and packet 118 * allocations. 119 */ 120 struct mb_args { 121 int flags; /* Flags for mbuf being allocated */ 122 short type; /* Type of mbuf being allocated */ 123 }; 124 #endif /* _KERNEL */ 125 126 /* 127 * Packet tag structure (see below for details). 128 */ 129 struct m_tag { 130 SLIST_ENTRY(m_tag) m_tag_link; /* List of packet tags */ 131 u_int16_t m_tag_id; /* Tag ID */ 132 u_int16_t m_tag_len; /* Length of data */ 133 u_int32_t m_tag_cookie; /* ABI/Module ID */ 134 void (*m_tag_free)(struct m_tag *); 135 }; 136 137 /* 138 * Static network interface owned tag. 139 * Allocated through ifp->if_snd_tag_alloc(). 140 */ 141 struct m_snd_tag { 142 struct ifnet *ifp; /* network interface tag belongs to */ 143 volatile u_int refcount; 144 u_int type; /* One of IF_SND_TAG_TYPE_*. */ 145 }; 146 147 /* 148 * Record/packet header in first mbuf of chain; valid only if M_PKTHDR is set. 149 * Size ILP32: 48 150 * LP64: 56 151 * Compile-time assertions in uipc_mbuf.c test these values to ensure that 152 * they are correct. 153 */ 154 struct pkthdr { 155 union { 156 struct m_snd_tag *snd_tag; /* send tag, if any */ 157 struct ifnet *rcvif; /* rcv interface */ 158 }; 159 SLIST_HEAD(packet_tags, m_tag) tags; /* list of packet tags */ 160 int32_t len; /* total packet length */ 161 162 /* Layer crossing persistent information. */ 163 uint32_t flowid; /* packet's 4-tuple system */ 164 uint32_t csum_flags; /* checksum and offload features */ 165 uint16_t fibnum; /* this packet should use this fib */ 166 uint8_t numa_domain; /* NUMA domain of recvd pkt */ 167 uint8_t rsstype; /* hash type */ 168 union { 169 uint64_t rcv_tstmp; /* timestamp in ns */ 170 struct { 171 uint8_t l2hlen; /* layer 2 hdr len */ 172 uint8_t l3hlen; /* layer 3 hdr len */ 173 uint8_t l4hlen; /* layer 4 hdr len */ 174 uint8_t l5hlen; /* layer 5 hdr len */ 175 uint8_t inner_l2hlen; 176 uint8_t inner_l3hlen; 177 uint8_t inner_l4hlen; 178 uint8_t inner_l5hlen; 179 }; 180 }; 181 union { 182 uint8_t eight[8]; 183 uint16_t sixteen[4]; 184 uint32_t thirtytwo[2]; 185 uint64_t sixtyfour[1]; 186 uintptr_t unintptr[1]; 187 void *ptr; 188 } PH_per; 189 190 /* Layer specific non-persistent local storage for reassembly, etc. */ 191 union { 192 uint8_t eight[8]; 193 uint16_t sixteen[4]; 194 uint32_t thirtytwo[2]; 195 uint64_t sixtyfour[1]; 196 uintptr_t unintptr[1]; 197 void *ptr; 198 } PH_loc; 199 }; 200 #define ether_vtag PH_per.sixteen[0] 201 #define PH_vt PH_per 202 #define vt_nrecs sixteen[0] /* mld and v6-ND */ 203 #define tso_segsz PH_per.sixteen[1] /* inbound after LRO */ 204 #define lro_nsegs tso_segsz /* inbound after LRO */ 205 #define csum_data PH_per.thirtytwo[1] /* inbound from hardware up */ 206 #define lro_len PH_loc.sixteen[0] /* inbound during LRO (no reassembly) */ 207 #define lro_csum PH_loc.sixteen[1] /* inbound during LRO (no reassembly) */ 208 #define lro_etype PH_loc.sixteen[2] /* inbound during LRO (no reassembly) */ 209 /* Note PH_loc is used during IP reassembly (all 8 bytes as a ptr) */ 210 211 /* 212 * TLS records for TLS 1.0-1.2 can have the following header lengths: 213 * - 5 (AES-CBC with implicit IV) 214 * - 21 (AES-CBC with explicit IV) 215 * - 13 (AES-GCM with 8 byte explicit IV) 216 */ 217 #define MBUF_PEXT_HDR_LEN 23 218 219 /* 220 * TLS records for TLS 1.0-1.2 can have the following maximum trailer 221 * lengths: 222 * - 16 (AES-GCM) 223 * - 36 (AES-CBC with SHA1 and up to 16 bytes of padding) 224 * - 48 (AES-CBC with SHA2-256 and up to 16 bytes of padding) 225 * - 64 (AES-CBC with SHA2-384 and up to 16 bytes of padding) 226 */ 227 #define MBUF_PEXT_TRAIL_LEN 64 228 229 #if defined(__LP64__) 230 #define MBUF_PEXT_MAX_PGS (40 / sizeof(vm_paddr_t)) 231 #else 232 #define MBUF_PEXT_MAX_PGS (72 / sizeof(vm_paddr_t)) 233 #endif 234 235 #define MBUF_PEXT_MAX_BYTES \ 236 (MBUF_PEXT_MAX_PGS * PAGE_SIZE + MBUF_PEXT_HDR_LEN + MBUF_PEXT_TRAIL_LEN) 237 238 struct ktls_session; 239 struct socket; 240 241 /* 242 * Description of external storage mapped into mbuf; valid only if M_EXT is 243 * set. 244 * Size ILP32: 28 245 * LP64: 48 246 * Compile-time assertions in uipc_mbuf.c test these values to ensure that 247 * they are correct. 248 */ 249 typedef void m_ext_free_t(struct mbuf *); 250 struct m_ext { 251 union { 252 /* 253 * If EXT_FLAG_EMBREF is set, then we use refcount in the 254 * mbuf, the 'ext_count' member. Otherwise, we have a 255 * shadow copy and we use pointer 'ext_cnt'. The original 256 * mbuf is responsible to carry the pointer to free routine 257 * and its arguments. They aren't copied into shadows in 258 * mb_dupcl() to avoid dereferencing next cachelines. 259 */ 260 volatile u_int ext_count; 261 volatile u_int *ext_cnt; 262 }; 263 uint32_t ext_size; /* size of buffer, for ext_free */ 264 uint32_t ext_type:8, /* type of external storage */ 265 ext_flags:24; /* external storage mbuf flags */ 266 union { 267 struct { 268 /* 269 * Regular M_EXT mbuf: 270 * o ext_buf always points to the external buffer. 271 * o ext_free (below) and two optional arguments 272 * ext_arg1 and ext_arg2 store the free context for 273 * the external storage. They are set only in the 274 * refcount carrying mbuf, the one with 275 * EXT_FLAG_EMBREF flag, with exclusion for 276 * EXT_EXTREF type, where the free context is copied 277 * into all mbufs that use same external storage. 278 */ 279 char *ext_buf; /* start of buffer */ 280 #define m_ext_copylen offsetof(struct m_ext, ext_arg2) 281 void *ext_arg2; 282 }; 283 struct { 284 /* 285 * Multi-page M_EXTPG mbuf: 286 * o extpg_pa - page vector. 287 * o extpg_trail and extpg_hdr - TLS trailer and 288 * header. 289 * Uses ext_free and may also use ext_arg1. 290 */ 291 vm_paddr_t extpg_pa[MBUF_PEXT_MAX_PGS]; 292 char extpg_trail[MBUF_PEXT_TRAIL_LEN]; 293 char extpg_hdr[MBUF_PEXT_HDR_LEN]; 294 /* Pretend these 3 fields are part of mbuf itself. */ 295 #define m_epg_pa m_ext.extpg_pa 296 #define m_epg_trail m_ext.extpg_trail 297 #define m_epg_hdr m_ext.extpg_hdr 298 #define m_epg_ext_copylen offsetof(struct m_ext, ext_free) 299 }; 300 }; 301 /* 302 * Free method and optional argument pointer, both 303 * used by M_EXT and M_EXTPG. 304 */ 305 m_ext_free_t *ext_free; 306 void *ext_arg1; 307 }; 308 309 /* 310 * The core of the mbuf object along with some shortcut defines for practical 311 * purposes. 312 */ 313 struct mbuf { 314 /* 315 * Header present at the beginning of every mbuf. 316 * Size ILP32: 24 317 * LP64: 32 318 * Compile-time assertions in uipc_mbuf.c test these values to ensure 319 * that they are correct. 320 */ 321 union { /* next buffer in chain */ 322 struct mbuf *m_next; 323 SLIST_ENTRY(mbuf) m_slist; 324 STAILQ_ENTRY(mbuf) m_stailq; 325 }; 326 union { /* next chain in queue/record */ 327 struct mbuf *m_nextpkt; 328 SLIST_ENTRY(mbuf) m_slistpkt; 329 STAILQ_ENTRY(mbuf) m_stailqpkt; 330 }; 331 caddr_t m_data; /* location of data */ 332 int32_t m_len; /* amount of data in this mbuf */ 333 uint32_t m_type:8, /* type of data in this mbuf */ 334 m_flags:24; /* flags; see below */ 335 #if !defined(__LP64__) 336 uint32_t m_pad; /* pad for 64bit alignment */ 337 #endif 338 339 /* 340 * A set of optional headers (packet header, external storage header) 341 * and internal data storage. Historically, these arrays were sized 342 * to MHLEN (space left after a packet header) and MLEN (space left 343 * after only a regular mbuf header); they are now variable size in 344 * order to support future work on variable-size mbufs. 345 */ 346 union { 347 struct { 348 union { 349 /* M_PKTHDR set. */ 350 struct pkthdr m_pkthdr; 351 352 /* M_EXTPG set. 353 * Multi-page M_EXTPG mbuf has its meta data 354 * split between the below anonymous structure 355 * and m_ext. It carries vector of pages, 356 * optional header and trailer char vectors 357 * and pointers to socket/TLS data. 358 */ 359 #define m_epg_startcopy m_epg_npgs 360 #define m_epg_endcopy m_epg_stailq 361 struct { 362 /* Overall count of pages and count of 363 * pages with I/O pending. */ 364 uint8_t m_epg_npgs; 365 uint8_t m_epg_nrdy; 366 /* TLS header and trailer lengths. 367 * The data itself resides in m_ext. */ 368 uint8_t m_epg_hdrlen; 369 uint8_t m_epg_trllen; 370 /* Offset into 1st page and length of 371 * data in the last page. */ 372 uint16_t m_epg_1st_off; 373 uint16_t m_epg_last_len; 374 uint8_t m_epg_flags; 375 #define EPG_FLAG_ANON 0x1 /* Data can be encrypted in place. */ 376 #define EPG_FLAG_2FREE 0x2 /* Scheduled for free. */ 377 uint8_t m_epg_record_type; 378 uint8_t __spare[2]; 379 int m_epg_enc_cnt; 380 struct ktls_session *m_epg_tls; 381 struct socket *m_epg_so; 382 uint64_t m_epg_seqno; 383 STAILQ_ENTRY(mbuf) m_epg_stailq; 384 }; 385 }; 386 union { 387 /* M_EXT or M_EXTPG set. */ 388 struct m_ext m_ext; 389 /* M_PKTHDR set, neither M_EXT nor M_EXTPG. */ 390 char m_pktdat[0]; 391 }; 392 }; 393 char m_dat[0]; /* !M_PKTHDR, !M_EXT */ 394 }; 395 }; 396 397 #ifdef _KERNEL 398 static inline int 399 m_epg_pagelen(const struct mbuf *m, int pidx, int pgoff) 400 { 401 402 KASSERT(pgoff == 0 || pidx == 0, 403 ("page %d with non-zero offset %d in %p", pidx, pgoff, m)); 404 405 if (pidx == m->m_epg_npgs - 1) { 406 return (m->m_epg_last_len); 407 } else { 408 return (PAGE_SIZE - pgoff); 409 } 410 } 411 412 #ifdef INVARIANTS 413 #define MCHECK(ex, msg) KASSERT((ex), \ 414 ("Multi page mbuf %p with " #msg " at %s:%d", \ 415 m, __FILE__, __LINE__)) 416 /* 417 * NB: This expects a non-empty buffer (npgs > 0 and 418 * last_pg_len > 0). 419 */ 420 #define MBUF_EXT_PGS_ASSERT_SANITY(m) do { \ 421 MCHECK(m->m_epg_npgs > 0, "no valid pages"); \ 422 MCHECK(m->m_epg_npgs <= nitems(m->m_epg_pa), \ 423 "too many pages"); \ 424 MCHECK(m->m_epg_nrdy <= m->m_epg_npgs, \ 425 "too many ready pages"); \ 426 MCHECK(m->m_epg_1st_off < PAGE_SIZE, \ 427 "too large page offset"); \ 428 MCHECK(m->m_epg_last_len > 0, "zero last page length"); \ 429 MCHECK(m->m_epg_last_len <= PAGE_SIZE, \ 430 "too large last page length"); \ 431 if (m->m_epg_npgs == 1) \ 432 MCHECK(m->m_epg_1st_off + \ 433 m->m_epg_last_len <= PAGE_SIZE, \ 434 "single page too large"); \ 435 MCHECK(m->m_epg_hdrlen <= sizeof(m->m_epg_hdr), \ 436 "too large header length"); \ 437 MCHECK(m->m_epg_trllen <= sizeof(m->m_epg_trail), \ 438 "too large header length"); \ 439 } while (0) 440 #else 441 #define MBUF_EXT_PGS_ASSERT_SANITY(m) do {} while (0); 442 #endif 443 #endif 444 445 /* 446 * mbuf flags of global significance and layer crossing. 447 * Those of only protocol/layer specific significance are to be mapped 448 * to M_PROTO[1-11] and cleared at layer handoff boundaries. 449 * NB: Limited to the lower 24 bits. 450 */ 451 #define M_EXT 0x00000001 /* has associated external storage */ 452 #define M_PKTHDR 0x00000002 /* start of record */ 453 #define M_EOR 0x00000004 /* end of record */ 454 #define M_RDONLY 0x00000008 /* associated data is marked read-only */ 455 #define M_BCAST 0x00000010 /* send/received as link-level broadcast */ 456 #define M_MCAST 0x00000020 /* send/received as link-level multicast */ 457 #define M_PROMISC 0x00000040 /* packet was not for us */ 458 #define M_VLANTAG 0x00000080 /* ether_vtag is valid */ 459 #define M_EXTPG 0x00000100 /* has array of unmapped pages and TLS */ 460 #define M_NOFREE 0x00000200 /* do not free mbuf, embedded in cluster */ 461 #define M_TSTMP 0x00000400 /* rcv_tstmp field is valid */ 462 #define M_TSTMP_HPREC 0x00000800 /* rcv_tstmp is high-prec, typically 463 hw-stamped on port (useful for IEEE 1588 464 and 802.1AS) */ 465 #define M_TSTMP_LRO 0x00001000 /* Time LRO pushed in pkt is valid in (PH_loc) */ 466 467 #define M_PROTO1 0x00002000 /* protocol-specific */ 468 #define M_PROTO2 0x00004000 /* protocol-specific */ 469 #define M_PROTO3 0x00008000 /* protocol-specific */ 470 #define M_PROTO4 0x00010000 /* protocol-specific */ 471 #define M_PROTO5 0x00020000 /* protocol-specific */ 472 #define M_PROTO6 0x00040000 /* protocol-specific */ 473 #define M_PROTO7 0x00080000 /* protocol-specific */ 474 #define M_PROTO8 0x00100000 /* protocol-specific */ 475 #define M_PROTO9 0x00200000 /* protocol-specific */ 476 #define M_PROTO10 0x00400000 /* protocol-specific */ 477 #define M_PROTO11 0x00800000 /* protocol-specific */ 478 479 #define MB_DTOR_SKIP 0x1 /* don't pollute the cache by touching a freed mbuf */ 480 481 /* 482 * Flags to purge when crossing layers. 483 */ 484 #define M_PROTOFLAGS \ 485 (M_PROTO1|M_PROTO2|M_PROTO3|M_PROTO4|M_PROTO5|M_PROTO6|M_PROTO7|M_PROTO8|\ 486 M_PROTO9|M_PROTO10|M_PROTO11) 487 488 /* 489 * Flags preserved when copying m_pkthdr. 490 */ 491 #define M_COPYFLAGS \ 492 (M_PKTHDR|M_EOR|M_RDONLY|M_BCAST|M_MCAST|M_PROMISC|M_VLANTAG|M_TSTMP| \ 493 M_TSTMP_HPREC|M_TSTMP_LRO|M_PROTOFLAGS) 494 495 /* 496 * Mbuf flag description for use with printf(9) %b identifier. 497 */ 498 #define M_FLAG_BITS \ 499 "\20\1M_EXT\2M_PKTHDR\3M_EOR\4M_RDONLY\5M_BCAST\6M_MCAST" \ 500 "\7M_PROMISC\10M_VLANTAG\11M_EXTPG\12M_NOFREE\13M_TSTMP\14M_TSTMP_HPREC\15M_TSTMP_LRO" 501 #define M_FLAG_PROTOBITS \ 502 "\16M_PROTO1\17M_PROTO2\20M_PROTO3\21M_PROTO4" \ 503 "\22M_PROTO5\23M_PROTO6\24M_PROTO7\25M_PROTO8\26M_PROTO9" \ 504 "\27M_PROTO10\28M_PROTO11" 505 #define M_FLAG_PRINTF (M_FLAG_BITS M_FLAG_PROTOBITS) 506 507 /* 508 * Network interface cards are able to hash protocol fields (such as IPv4 509 * addresses and TCP port numbers) classify packets into flows. These flows 510 * can then be used to maintain ordering while delivering packets to the OS 511 * via parallel input queues, as well as to provide a stateless affinity 512 * model. NIC drivers can pass up the hash via m->m_pkthdr.flowid, and set 513 * m_flag fields to indicate how the hash should be interpreted by the 514 * network stack. 515 * 516 * Most NICs support RSS, which provides ordering and explicit affinity, and 517 * use the hash m_flag bits to indicate what header fields were covered by 518 * the hash. M_HASHTYPE_OPAQUE and M_HASHTYPE_OPAQUE_HASH can be set by non- 519 * RSS cards or configurations that provide an opaque flow identifier, allowing 520 * for ordering and distribution without explicit affinity. Additionally, 521 * M_HASHTYPE_OPAQUE_HASH indicates that the flow identifier has hash 522 * properties. 523 * 524 * The meaning of the IPV6_EX suffix: 525 * "o Home address from the home address option in the IPv6 destination 526 * options header. If the extension header is not present, use the Source 527 * IPv6 Address. 528 * o IPv6 address that is contained in the Routing-Header-Type-2 from the 529 * associated extension header. If the extension header is not present, 530 * use the Destination IPv6 Address." 531 * Quoted from: 532 * https://docs.microsoft.com/en-us/windows-hardware/drivers/network/rss-hashing-types#ndishashipv6ex 533 */ 534 #define M_HASHTYPE_HASHPROP 0x80 /* has hash properties */ 535 #define M_HASHTYPE_HASH(t) (M_HASHTYPE_HASHPROP | (t)) 536 /* Microsoft RSS standard hash types */ 537 #define M_HASHTYPE_NONE 0 538 #define M_HASHTYPE_RSS_IPV4 M_HASHTYPE_HASH(1) /* IPv4 2-tuple */ 539 #define M_HASHTYPE_RSS_TCP_IPV4 M_HASHTYPE_HASH(2) /* TCPv4 4-tuple */ 540 #define M_HASHTYPE_RSS_IPV6 M_HASHTYPE_HASH(3) /* IPv6 2-tuple */ 541 #define M_HASHTYPE_RSS_TCP_IPV6 M_HASHTYPE_HASH(4) /* TCPv6 4-tuple */ 542 #define M_HASHTYPE_RSS_IPV6_EX M_HASHTYPE_HASH(5) /* IPv6 2-tuple + 543 * ext hdrs */ 544 #define M_HASHTYPE_RSS_TCP_IPV6_EX M_HASHTYPE_HASH(6) /* TCPv6 4-tuple + 545 * ext hdrs */ 546 #define M_HASHTYPE_RSS_UDP_IPV4 M_HASHTYPE_HASH(7) /* IPv4 UDP 4-tuple*/ 547 #define M_HASHTYPE_RSS_UDP_IPV6 M_HASHTYPE_HASH(9) /* IPv6 UDP 4-tuple*/ 548 #define M_HASHTYPE_RSS_UDP_IPV6_EX M_HASHTYPE_HASH(10)/* IPv6 UDP 4-tuple + 549 * ext hdrs */ 550 551 #define M_HASHTYPE_OPAQUE 63 /* ordering, not affinity */ 552 #define M_HASHTYPE_OPAQUE_HASH M_HASHTYPE_HASH(M_HASHTYPE_OPAQUE) 553 /* ordering+hash, not affinity*/ 554 555 #define M_HASHTYPE_CLEAR(m) ((m)->m_pkthdr.rsstype = 0) 556 #define M_HASHTYPE_GET(m) ((m)->m_pkthdr.rsstype) 557 #define M_HASHTYPE_SET(m, v) ((m)->m_pkthdr.rsstype = (v)) 558 #define M_HASHTYPE_TEST(m, v) (M_HASHTYPE_GET(m) == (v)) 559 #define M_HASHTYPE_ISHASH(m) (M_HASHTYPE_GET(m) & M_HASHTYPE_HASHPROP) 560 561 /* 562 * External mbuf storage buffer types. 563 */ 564 #define EXT_CLUSTER 1 /* mbuf cluster */ 565 #define EXT_SFBUF 2 /* sendfile(2)'s sf_buf */ 566 #define EXT_JUMBOP 3 /* jumbo cluster page sized */ 567 #define EXT_JUMBO9 4 /* jumbo cluster 9216 bytes */ 568 #define EXT_JUMBO16 5 /* jumbo cluster 16184 bytes */ 569 #define EXT_PACKET 6 /* mbuf+cluster from packet zone */ 570 #define EXT_MBUF 7 /* external mbuf reference */ 571 #define EXT_RXRING 8 /* data in NIC receive ring */ 572 573 #define EXT_VENDOR1 224 /* for vendor-internal use */ 574 #define EXT_VENDOR2 225 /* for vendor-internal use */ 575 #define EXT_VENDOR3 226 /* for vendor-internal use */ 576 #define EXT_VENDOR4 227 /* for vendor-internal use */ 577 578 #define EXT_EXP1 244 /* for experimental use */ 579 #define EXT_EXP2 245 /* for experimental use */ 580 #define EXT_EXP3 246 /* for experimental use */ 581 #define EXT_EXP4 247 /* for experimental use */ 582 583 #define EXT_NET_DRV 252 /* custom ext_buf provided by net driver(s) */ 584 #define EXT_MOD_TYPE 253 /* custom module's ext_buf type */ 585 #define EXT_DISPOSABLE 254 /* can throw this buffer away w/page flipping */ 586 #define EXT_EXTREF 255 /* has externally maintained ext_cnt ptr */ 587 588 /* 589 * Flags for external mbuf buffer types. 590 * NB: limited to the lower 24 bits. 591 */ 592 #define EXT_FLAG_EMBREF 0x000001 /* embedded ext_count */ 593 #define EXT_FLAG_EXTREF 0x000002 /* external ext_cnt, notyet */ 594 595 #define EXT_FLAG_NOFREE 0x000010 /* don't free mbuf to pool, notyet */ 596 597 #define EXT_FLAG_VENDOR1 0x010000 /* These flags are vendor */ 598 #define EXT_FLAG_VENDOR2 0x020000 /* or submodule specific, */ 599 #define EXT_FLAG_VENDOR3 0x040000 /* not used by mbuf code. */ 600 #define EXT_FLAG_VENDOR4 0x080000 /* Set/read by submodule. */ 601 602 #define EXT_FLAG_EXP1 0x100000 /* for experimental use */ 603 #define EXT_FLAG_EXP2 0x200000 /* for experimental use */ 604 #define EXT_FLAG_EXP3 0x400000 /* for experimental use */ 605 #define EXT_FLAG_EXP4 0x800000 /* for experimental use */ 606 607 /* 608 * EXT flag description for use with printf(9) %b identifier. 609 */ 610 #define EXT_FLAG_BITS \ 611 "\20\1EXT_FLAG_EMBREF\2EXT_FLAG_EXTREF\5EXT_FLAG_NOFREE" \ 612 "\21EXT_FLAG_VENDOR1\22EXT_FLAG_VENDOR2\23EXT_FLAG_VENDOR3" \ 613 "\24EXT_FLAG_VENDOR4\25EXT_FLAG_EXP1\26EXT_FLAG_EXP2\27EXT_FLAG_EXP3" \ 614 "\30EXT_FLAG_EXP4" 615 616 /* 617 * Flags indicating checksum, segmentation and other offload work to be 618 * done, or already done, by hardware or lower layers. It is split into 619 * separate inbound and outbound flags. 620 * 621 * Outbound flags that are set by upper protocol layers requesting lower 622 * layers, or ideally the hardware, to perform these offloading tasks. 623 * For outbound packets this field and its flags can be directly tested 624 * against ifnet if_hwassist. Note that the outbound and the inbound flags do 625 * not collide right now but they could be allowed to (as long as the flags are 626 * scrubbed appropriately when the direction of an mbuf changes). CSUM_BITS 627 * would also have to split into CSUM_BITS_TX and CSUM_BITS_RX. 628 * 629 * CSUM_INNER_<x> is the same as CSUM_<x> but it applies to the inner frame. 630 * The CSUM_ENCAP_<x> bits identify the outer encapsulation. 631 */ 632 #define CSUM_IP 0x00000001 /* IP header checksum offload */ 633 #define CSUM_IP_UDP 0x00000002 /* UDP checksum offload */ 634 #define CSUM_IP_TCP 0x00000004 /* TCP checksum offload */ 635 #define CSUM_IP_SCTP 0x00000008 /* SCTP checksum offload */ 636 #define CSUM_IP_TSO 0x00000010 /* TCP segmentation offload */ 637 #define CSUM_IP_ISCSI 0x00000020 /* iSCSI checksum offload */ 638 639 #define CSUM_INNER_IP6_UDP 0x00000040 640 #define CSUM_INNER_IP6_TCP 0x00000080 641 #define CSUM_INNER_IP6_TSO 0x00000100 642 #define CSUM_IP6_UDP 0x00000200 /* UDP checksum offload */ 643 #define CSUM_IP6_TCP 0x00000400 /* TCP checksum offload */ 644 #define CSUM_IP6_SCTP 0x00000800 /* SCTP checksum offload */ 645 #define CSUM_IP6_TSO 0x00001000 /* TCP segmentation offload */ 646 #define CSUM_IP6_ISCSI 0x00002000 /* iSCSI checksum offload */ 647 648 #define CSUM_INNER_IP 0x00004000 649 #define CSUM_INNER_IP_UDP 0x00008000 650 #define CSUM_INNER_IP_TCP 0x00010000 651 #define CSUM_INNER_IP_TSO 0x00020000 652 653 #define CSUM_ENCAP_VXLAN 0x00040000 /* VXLAN outer encapsulation */ 654 #define CSUM_ENCAP_RSVD1 0x00080000 655 656 /* Inbound checksum support where the checksum was verified by hardware. */ 657 #define CSUM_INNER_L3_CALC 0x00100000 658 #define CSUM_INNER_L3_VALID 0x00200000 659 #define CSUM_INNER_L4_CALC 0x00400000 660 #define CSUM_INNER_L4_VALID 0x00800000 661 #define CSUM_L3_CALC 0x01000000 /* calculated layer 3 csum */ 662 #define CSUM_L3_VALID 0x02000000 /* checksum is correct */ 663 #define CSUM_L4_CALC 0x04000000 /* calculated layer 4 csum */ 664 #define CSUM_L4_VALID 0x08000000 /* checksum is correct */ 665 #define CSUM_L5_CALC 0x10000000 /* calculated layer 5 csum */ 666 #define CSUM_L5_VALID 0x20000000 /* checksum is correct */ 667 #define CSUM_COALESCED 0x40000000 /* contains merged segments */ 668 669 #define CSUM_SND_TAG 0x80000000 /* Packet header has send tag */ 670 671 #define CSUM_FLAGS_TX (CSUM_IP | CSUM_IP_UDP | CSUM_IP_TCP | CSUM_IP_SCTP | \ 672 CSUM_IP_TSO | CSUM_IP_ISCSI | CSUM_INNER_IP6_UDP | CSUM_INNER_IP6_TCP | \ 673 CSUM_INNER_IP6_TSO | CSUM_IP6_UDP | CSUM_IP6_TCP | CSUM_IP6_SCTP | \ 674 CSUM_IP6_TSO | CSUM_IP6_ISCSI | CSUM_INNER_IP | CSUM_INNER_IP_UDP | \ 675 CSUM_INNER_IP_TCP | CSUM_INNER_IP_TSO | CSUM_ENCAP_VXLAN | \ 676 CSUM_ENCAP_RSVD1 | CSUM_SND_TAG) 677 678 #define CSUM_FLAGS_RX (CSUM_INNER_L3_CALC | CSUM_INNER_L3_VALID | \ 679 CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID | CSUM_L3_CALC | CSUM_L3_VALID | \ 680 CSUM_L4_CALC | CSUM_L4_VALID | CSUM_L5_CALC | CSUM_L5_VALID | \ 681 CSUM_COALESCED) 682 683 /* 684 * CSUM flag description for use with printf(9) %b identifier. 685 */ 686 #define CSUM_BITS \ 687 "\20\1CSUM_IP\2CSUM_IP_UDP\3CSUM_IP_TCP\4CSUM_IP_SCTP\5CSUM_IP_TSO" \ 688 "\6CSUM_IP_ISCSI\7CSUM_INNER_IP6_UDP\10CSUM_INNER_IP6_TCP" \ 689 "\11CSUM_INNER_IP6_TSO\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP" \ 690 "\15CSUM_IP6_TSO\16CSUM_IP6_ISCSI\17CSUM_INNER_IP\20CSUM_INNER_IP_UDP" \ 691 "\21CSUM_INNER_IP_TCP\22CSUM_INNER_IP_TSO\23CSUM_ENCAP_VXLAN" \ 692 "\24CSUM_ENCAP_RSVD1\25CSUM_INNER_L3_CALC\26CSUM_INNER_L3_VALID" \ 693 "\27CSUM_INNER_L4_CALC\30CSUM_INNER_L4_VALID\31CSUM_L3_CALC" \ 694 "\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID\35CSUM_L5_CALC" \ 695 "\36CSUM_L5_VALID\37CSUM_COALESCED\40CSUM_SND_TAG" 696 697 /* CSUM flags compatibility mappings. */ 698 #define CSUM_IP_CHECKED CSUM_L3_CALC 699 #define CSUM_IP_VALID CSUM_L3_VALID 700 #define CSUM_DATA_VALID CSUM_L4_VALID 701 #define CSUM_PSEUDO_HDR CSUM_L4_CALC 702 #define CSUM_SCTP_VALID CSUM_L4_VALID 703 #define CSUM_DELAY_DATA (CSUM_TCP|CSUM_UDP) 704 #define CSUM_DELAY_IP CSUM_IP /* Only v4, no v6 IP hdr csum */ 705 #define CSUM_DELAY_DATA_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6) 706 #define CSUM_DATA_VALID_IPV6 CSUM_DATA_VALID 707 #define CSUM_TCP CSUM_IP_TCP 708 #define CSUM_UDP CSUM_IP_UDP 709 #define CSUM_SCTP CSUM_IP_SCTP 710 #define CSUM_TSO (CSUM_IP_TSO|CSUM_IP6_TSO) 711 #define CSUM_INNER_TSO (CSUM_INNER_IP_TSO|CSUM_INNER_IP6_TSO) 712 #define CSUM_UDP_IPV6 CSUM_IP6_UDP 713 #define CSUM_TCP_IPV6 CSUM_IP6_TCP 714 #define CSUM_SCTP_IPV6 CSUM_IP6_SCTP 715 716 /* 717 * mbuf types describing the content of the mbuf (including external storage). 718 */ 719 #define MT_NOTMBUF 0 /* USED INTERNALLY ONLY! Object is not mbuf */ 720 #define MT_DATA 1 /* dynamic (data) allocation */ 721 #define MT_HEADER MT_DATA /* packet header, use M_PKTHDR instead */ 722 723 #define MT_VENDOR1 4 /* for vendor-internal use */ 724 #define MT_VENDOR2 5 /* for vendor-internal use */ 725 #define MT_VENDOR3 6 /* for vendor-internal use */ 726 #define MT_VENDOR4 7 /* for vendor-internal use */ 727 728 #define MT_SONAME 8 /* socket name */ 729 730 #define MT_EXP1 9 /* for experimental use */ 731 #define MT_EXP2 10 /* for experimental use */ 732 #define MT_EXP3 11 /* for experimental use */ 733 #define MT_EXP4 12 /* for experimental use */ 734 735 #define MT_CONTROL 14 /* extra-data protocol message */ 736 #define MT_EXTCONTROL 15 /* control message with externalized contents */ 737 #define MT_OOBDATA 16 /* expedited data */ 738 739 #define MT_NOINIT 255 /* Not a type but a flag to allocate 740 a non-initialized mbuf */ 741 742 /* 743 * String names of mbuf-related UMA(9) and malloc(9) types. Exposed to 744 * !_KERNEL so that monitoring tools can look up the zones with 745 * libmemstat(3). 746 */ 747 #define MBUF_MEM_NAME "mbuf" 748 #define MBUF_CLUSTER_MEM_NAME "mbuf_cluster" 749 #define MBUF_PACKET_MEM_NAME "mbuf_packet" 750 #define MBUF_JUMBOP_MEM_NAME "mbuf_jumbo_page" 751 #define MBUF_JUMBO9_MEM_NAME "mbuf_jumbo_9k" 752 #define MBUF_JUMBO16_MEM_NAME "mbuf_jumbo_16k" 753 #define MBUF_TAG_MEM_NAME "mbuf_tag" 754 #define MBUF_EXTREFCNT_MEM_NAME "mbuf_ext_refcnt" 755 #define MBUF_EXTPGS_MEM_NAME "mbuf_extpgs" 756 757 #ifdef _KERNEL 758 union if_snd_tag_alloc_params; 759 760 #ifdef WITNESS 761 #define MBUF_CHECKSLEEP(how) do { \ 762 if (how == M_WAITOK) \ 763 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ 764 "Sleeping in \"%s\"", __func__); \ 765 } while (0) 766 #else 767 #define MBUF_CHECKSLEEP(how) 768 #endif 769 770 /* 771 * Network buffer allocation API 772 * 773 * The rest of it is defined in kern/kern_mbuf.c 774 */ 775 extern uma_zone_t zone_mbuf; 776 extern uma_zone_t zone_clust; 777 extern uma_zone_t zone_pack; 778 extern uma_zone_t zone_jumbop; 779 extern uma_zone_t zone_jumbo9; 780 extern uma_zone_t zone_jumbo16; 781 extern uma_zone_t zone_extpgs; 782 783 void mb_dupcl(struct mbuf *, struct mbuf *); 784 void mb_free_ext(struct mbuf *); 785 void mb_free_extpg(struct mbuf *); 786 void mb_free_mext_pgs(struct mbuf *); 787 struct mbuf *mb_alloc_ext_pgs(int, m_ext_free_t); 788 struct mbuf *mb_alloc_ext_plus_pages(int, int); 789 struct mbuf *mb_mapped_to_unmapped(struct mbuf *, int, int, int, 790 struct mbuf **); 791 int mb_unmapped_compress(struct mbuf *m); 792 struct mbuf *mb_unmapped_to_ext(struct mbuf *m); 793 void mb_free_notready(struct mbuf *m, int count); 794 void m_adj(struct mbuf *, int); 795 int m_apply(struct mbuf *, int, int, 796 int (*)(void *, void *, u_int), void *); 797 int m_append(struct mbuf *, int, c_caddr_t); 798 void m_cat(struct mbuf *, struct mbuf *); 799 void m_catpkt(struct mbuf *, struct mbuf *); 800 int m_clget(struct mbuf *m, int how); 801 void *m_cljget(struct mbuf *m, int how, int size); 802 struct mbuf *m_collapse(struct mbuf *, int, int); 803 void m_copyback(struct mbuf *, int, int, c_caddr_t); 804 void m_copydata(const struct mbuf *, int, int, caddr_t); 805 struct mbuf *m_copym(struct mbuf *, int, int, int); 806 struct mbuf *m_copypacket(struct mbuf *, int); 807 void m_copy_pkthdr(struct mbuf *, struct mbuf *); 808 struct mbuf *m_copyup(struct mbuf *, int, int); 809 struct mbuf *m_defrag(struct mbuf *, int); 810 void m_demote_pkthdr(struct mbuf *); 811 void m_demote(struct mbuf *, int, int); 812 struct mbuf *m_devget(char *, int, int, struct ifnet *, 813 void (*)(char *, caddr_t, u_int)); 814 void m_dispose_extcontrolm(struct mbuf *m); 815 struct mbuf *m_dup(const struct mbuf *, int); 816 int m_dup_pkthdr(struct mbuf *, const struct mbuf *, int); 817 void m_extadd(struct mbuf *, char *, u_int, m_ext_free_t, 818 void *, void *, int, int); 819 u_int m_fixhdr(struct mbuf *); 820 struct mbuf *m_fragment(struct mbuf *, int, int); 821 void m_freem(struct mbuf *); 822 struct mbuf *m_get2(int, int, short, int); 823 struct mbuf *m_getjcl(int, short, int, int); 824 struct mbuf *m_getm2(struct mbuf *, int, int, short, int); 825 struct mbuf *m_getptr(struct mbuf *, int, int *); 826 u_int m_length(struct mbuf *, struct mbuf **); 827 int m_mbuftouio(struct uio *, const struct mbuf *, int); 828 int m_unmappedtouio(const struct mbuf *, int, struct uio *, int); 829 void m_move_pkthdr(struct mbuf *, struct mbuf *); 830 int m_pkthdr_init(struct mbuf *, int); 831 struct mbuf *m_prepend(struct mbuf *, int, int); 832 void m_print(const struct mbuf *, int); 833 struct mbuf *m_pulldown(struct mbuf *, int, int, int *); 834 struct mbuf *m_pullup(struct mbuf *, int); 835 int m_sanity(struct mbuf *, int); 836 struct mbuf *m_split(struct mbuf *, int, int); 837 struct mbuf *m_uiotombuf(struct uio *, int, int, int, int); 838 struct mbuf *m_unshare(struct mbuf *, int); 839 int m_snd_tag_alloc(struct ifnet *, 840 union if_snd_tag_alloc_params *, struct m_snd_tag **); 841 void m_snd_tag_init(struct m_snd_tag *, struct ifnet *, u_int); 842 void m_snd_tag_destroy(struct m_snd_tag *); 843 844 static __inline int 845 m_gettype(int size) 846 { 847 int type; 848 849 switch (size) { 850 case MSIZE: 851 type = EXT_MBUF; 852 break; 853 case MCLBYTES: 854 type = EXT_CLUSTER; 855 break; 856 #if MJUMPAGESIZE != MCLBYTES 857 case MJUMPAGESIZE: 858 type = EXT_JUMBOP; 859 break; 860 #endif 861 case MJUM9BYTES: 862 type = EXT_JUMBO9; 863 break; 864 case MJUM16BYTES: 865 type = EXT_JUMBO16; 866 break; 867 default: 868 panic("%s: invalid cluster size %d", __func__, size); 869 } 870 871 return (type); 872 } 873 874 /* 875 * Associated an external reference counted buffer with an mbuf. 876 */ 877 static __inline void 878 m_extaddref(struct mbuf *m, char *buf, u_int size, u_int *ref_cnt, 879 m_ext_free_t freef, void *arg1, void *arg2) 880 { 881 882 KASSERT(ref_cnt != NULL, ("%s: ref_cnt not provided", __func__)); 883 884 atomic_add_int(ref_cnt, 1); 885 m->m_flags |= M_EXT; 886 m->m_ext.ext_buf = buf; 887 m->m_ext.ext_cnt = ref_cnt; 888 m->m_data = m->m_ext.ext_buf; 889 m->m_ext.ext_size = size; 890 m->m_ext.ext_free = freef; 891 m->m_ext.ext_arg1 = arg1; 892 m->m_ext.ext_arg2 = arg2; 893 m->m_ext.ext_type = EXT_EXTREF; 894 m->m_ext.ext_flags = 0; 895 } 896 897 static __inline uma_zone_t 898 m_getzone(int size) 899 { 900 uma_zone_t zone; 901 902 switch (size) { 903 case MCLBYTES: 904 zone = zone_clust; 905 break; 906 #if MJUMPAGESIZE != MCLBYTES 907 case MJUMPAGESIZE: 908 zone = zone_jumbop; 909 break; 910 #endif 911 case MJUM9BYTES: 912 zone = zone_jumbo9; 913 break; 914 case MJUM16BYTES: 915 zone = zone_jumbo16; 916 break; 917 default: 918 panic("%s: invalid cluster size %d", __func__, size); 919 } 920 921 return (zone); 922 } 923 924 /* 925 * Initialize an mbuf with linear storage. 926 * 927 * Inline because the consumer text overhead will be roughly the same to 928 * initialize or call a function with this many parameters and M_PKTHDR 929 * should go away with constant propagation for !MGETHDR. 930 */ 931 static __inline int 932 m_init(struct mbuf *m, int how, short type, int flags) 933 { 934 int error; 935 936 m->m_next = NULL; 937 m->m_nextpkt = NULL; 938 m->m_data = m->m_dat; 939 m->m_len = 0; 940 m->m_flags = flags; 941 m->m_type = type; 942 if (flags & M_PKTHDR) 943 error = m_pkthdr_init(m, how); 944 else 945 error = 0; 946 947 MBUF_PROBE5(m__init, m, how, type, flags, error); 948 return (error); 949 } 950 951 static __inline struct mbuf * 952 m_get(int how, short type) 953 { 954 struct mbuf *m; 955 struct mb_args args; 956 957 args.flags = 0; 958 args.type = type; 959 m = uma_zalloc_arg(zone_mbuf, &args, how); 960 MBUF_PROBE3(m__get, how, type, m); 961 return (m); 962 } 963 964 static __inline struct mbuf * 965 m_gethdr(int how, short type) 966 { 967 struct mbuf *m; 968 struct mb_args args; 969 970 args.flags = M_PKTHDR; 971 args.type = type; 972 m = uma_zalloc_arg(zone_mbuf, &args, how); 973 MBUF_PROBE3(m__gethdr, how, type, m); 974 return (m); 975 } 976 977 static __inline struct mbuf * 978 m_getcl(int how, short type, int flags) 979 { 980 struct mbuf *m; 981 struct mb_args args; 982 983 args.flags = flags; 984 args.type = type; 985 m = uma_zalloc_arg(zone_pack, &args, how); 986 MBUF_PROBE4(m__getcl, how, type, flags, m); 987 return (m); 988 } 989 990 /* 991 * XXX: m_cljset() is a dangerous API. One must attach only a new, 992 * unreferenced cluster to an mbuf(9). It is not possible to assert 993 * that, so care can be taken only by users of the API. 994 */ 995 static __inline void 996 m_cljset(struct mbuf *m, void *cl, int type) 997 { 998 int size; 999 1000 switch (type) { 1001 case EXT_CLUSTER: 1002 size = MCLBYTES; 1003 break; 1004 #if MJUMPAGESIZE != MCLBYTES 1005 case EXT_JUMBOP: 1006 size = MJUMPAGESIZE; 1007 break; 1008 #endif 1009 case EXT_JUMBO9: 1010 size = MJUM9BYTES; 1011 break; 1012 case EXT_JUMBO16: 1013 size = MJUM16BYTES; 1014 break; 1015 default: 1016 panic("%s: unknown cluster type %d", __func__, type); 1017 break; 1018 } 1019 1020 m->m_data = m->m_ext.ext_buf = cl; 1021 m->m_ext.ext_free = m->m_ext.ext_arg1 = m->m_ext.ext_arg2 = NULL; 1022 m->m_ext.ext_size = size; 1023 m->m_ext.ext_type = type; 1024 m->m_ext.ext_flags = EXT_FLAG_EMBREF; 1025 m->m_ext.ext_count = 1; 1026 m->m_flags |= M_EXT; 1027 MBUF_PROBE3(m__cljset, m, cl, type); 1028 } 1029 1030 static __inline void 1031 m_chtype(struct mbuf *m, short new_type) 1032 { 1033 1034 m->m_type = new_type; 1035 } 1036 1037 static __inline void 1038 m_clrprotoflags(struct mbuf *m) 1039 { 1040 1041 while (m) { 1042 m->m_flags &= ~M_PROTOFLAGS; 1043 m = m->m_next; 1044 } 1045 } 1046 1047 static __inline struct mbuf * 1048 m_last(struct mbuf *m) 1049 { 1050 1051 while (m->m_next) 1052 m = m->m_next; 1053 return (m); 1054 } 1055 1056 static inline u_int 1057 m_extrefcnt(struct mbuf *m) 1058 { 1059 1060 KASSERT(m->m_flags & M_EXT, ("%s: M_EXT missing", __func__)); 1061 1062 return ((m->m_ext.ext_flags & EXT_FLAG_EMBREF) ? m->m_ext.ext_count : 1063 *m->m_ext.ext_cnt); 1064 } 1065 1066 /* 1067 * mbuf, cluster, and external object allocation macros (for compatibility 1068 * purposes). 1069 */ 1070 #define M_MOVE_PKTHDR(to, from) m_move_pkthdr((to), (from)) 1071 #define MGET(m, how, type) ((m) = m_get((how), (type))) 1072 #define MGETHDR(m, how, type) ((m) = m_gethdr((how), (type))) 1073 #define MCLGET(m, how) m_clget((m), (how)) 1074 #define MEXTADD(m, buf, size, free, arg1, arg2, flags, type) \ 1075 m_extadd((m), (char *)(buf), (size), (free), (arg1), (arg2), \ 1076 (flags), (type)) 1077 #define m_getm(m, len, how, type) \ 1078 m_getm2((m), (len), (how), (type), M_PKTHDR) 1079 1080 /* 1081 * Evaluate TRUE if it's safe to write to the mbuf m's data region (this can 1082 * be both the local data payload, or an external buffer area, depending on 1083 * whether M_EXT is set). 1084 */ 1085 #define M_WRITABLE(m) (((m)->m_flags & (M_RDONLY | M_EXTPG)) == 0 && \ 1086 (!(((m)->m_flags & M_EXT)) || \ 1087 (m_extrefcnt(m) == 1))) 1088 1089 /* Check if the supplied mbuf has a packet header, or else panic. */ 1090 #define M_ASSERTPKTHDR(m) \ 1091 KASSERT((m) != NULL && (m)->m_flags & M_PKTHDR, \ 1092 ("%s: no mbuf packet header!", __func__)) 1093 1094 /* Check if mbuf is multipage. */ 1095 #define M_ASSERTEXTPG(m) \ 1096 KASSERT(((m)->m_flags & (M_EXTPG|M_PKTHDR)) == M_EXTPG, \ 1097 ("%s: m %p is not multipage!", __func__, m)) 1098 1099 /* 1100 * Ensure that the supplied mbuf is a valid, non-free mbuf. 1101 * 1102 * XXX: Broken at the moment. Need some UMA magic to make it work again. 1103 */ 1104 #define M_ASSERTVALID(m) \ 1105 KASSERT((((struct mbuf *)m)->m_flags & 0) == 0, \ 1106 ("%s: attempted use of a free mbuf!", __func__)) 1107 1108 /* 1109 * Return the address of the start of the buffer associated with an mbuf, 1110 * handling external storage, packet-header mbufs, and regular data mbufs. 1111 */ 1112 #define M_START(m) \ 1113 (((m)->m_flags & M_EXTPG) ? NULL : \ 1114 ((m)->m_flags & M_EXT) ? (m)->m_ext.ext_buf : \ 1115 ((m)->m_flags & M_PKTHDR) ? &(m)->m_pktdat[0] : \ 1116 &(m)->m_dat[0]) 1117 1118 /* 1119 * Return the size of the buffer associated with an mbuf, handling external 1120 * storage, packet-header mbufs, and regular data mbufs. 1121 */ 1122 #define M_SIZE(m) \ 1123 (((m)->m_flags & M_EXT) ? (m)->m_ext.ext_size : \ 1124 ((m)->m_flags & M_PKTHDR) ? MHLEN : \ 1125 MLEN) 1126 1127 /* 1128 * Set the m_data pointer of a newly allocated mbuf to place an object of the 1129 * specified size at the end of the mbuf, longword aligned. 1130 * 1131 * NB: Historically, we had M_ALIGN(), MH_ALIGN(), and MEXT_ALIGN() as 1132 * separate macros, each asserting that it was called at the proper moment. 1133 * This required callers to themselves test the storage type and call the 1134 * right one. Rather than require callers to be aware of those layout 1135 * decisions, we centralize here. 1136 */ 1137 static __inline void 1138 m_align(struct mbuf *m, int len) 1139 { 1140 #ifdef INVARIANTS 1141 const char *msg = "%s: not a virgin mbuf"; 1142 #endif 1143 int adjust; 1144 1145 KASSERT(m->m_data == M_START(m), (msg, __func__)); 1146 1147 adjust = M_SIZE(m) - len; 1148 m->m_data += adjust &~ (sizeof(long)-1); 1149 } 1150 1151 #define M_ALIGN(m, len) m_align(m, len) 1152 #define MH_ALIGN(m, len) m_align(m, len) 1153 #define MEXT_ALIGN(m, len) m_align(m, len) 1154 1155 /* 1156 * Compute the amount of space available before the current start of data in 1157 * an mbuf. 1158 * 1159 * The M_WRITABLE() is a temporary, conservative safety measure: the burden 1160 * of checking writability of the mbuf data area rests solely with the caller. 1161 * 1162 * NB: In previous versions, M_LEADINGSPACE() would only check M_WRITABLE() 1163 * for mbufs with external storage. We now allow mbuf-embedded data to be 1164 * read-only as well. 1165 */ 1166 #define M_LEADINGSPACE(m) \ 1167 (M_WRITABLE(m) ? ((m)->m_data - M_START(m)) : 0) 1168 1169 /* 1170 * Compute the amount of space available after the end of data in an mbuf. 1171 * 1172 * The M_WRITABLE() is a temporary, conservative safety measure: the burden 1173 * of checking writability of the mbuf data area rests solely with the caller. 1174 * 1175 * NB: In previous versions, M_TRAILINGSPACE() would only check M_WRITABLE() 1176 * for mbufs with external storage. We now allow mbuf-embedded data to be 1177 * read-only as well. 1178 */ 1179 #define M_TRAILINGSPACE(m) \ 1180 (M_WRITABLE(m) ? \ 1181 ((M_START(m) + M_SIZE(m)) - ((m)->m_data + (m)->m_len)) : 0) 1182 1183 /* 1184 * Arrange to prepend space of size plen to mbuf m. If a new mbuf must be 1185 * allocated, how specifies whether to wait. If the allocation fails, the 1186 * original mbuf chain is freed and m is set to NULL. 1187 */ 1188 #define M_PREPEND(m, plen, how) do { \ 1189 struct mbuf **_mmp = &(m); \ 1190 struct mbuf *_mm = *_mmp; \ 1191 int _mplen = (plen); \ 1192 int __mhow = (how); \ 1193 \ 1194 MBUF_CHECKSLEEP(how); \ 1195 if (M_LEADINGSPACE(_mm) >= _mplen) { \ 1196 _mm->m_data -= _mplen; \ 1197 _mm->m_len += _mplen; \ 1198 } else \ 1199 _mm = m_prepend(_mm, _mplen, __mhow); \ 1200 if (_mm != NULL && _mm->m_flags & M_PKTHDR) \ 1201 _mm->m_pkthdr.len += _mplen; \ 1202 *_mmp = _mm; \ 1203 } while (0) 1204 1205 /* 1206 * Change mbuf to new type. This is a relatively expensive operation and 1207 * should be avoided. 1208 */ 1209 #define MCHTYPE(m, t) m_chtype((m), (t)) 1210 1211 /* Return the rcvif of a packet header. */ 1212 static __inline struct ifnet * 1213 m_rcvif(struct mbuf *m) 1214 { 1215 1216 M_ASSERTPKTHDR(m); 1217 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1218 return (NULL); 1219 return (m->m_pkthdr.rcvif); 1220 } 1221 1222 /* Length to m_copy to copy all. */ 1223 #define M_COPYALL 1000000000 1224 1225 extern int max_datalen; /* MHLEN - max_hdr */ 1226 extern int max_hdr; /* Largest link + protocol header */ 1227 extern int max_linkhdr; /* Largest link-level header */ 1228 extern int max_protohdr; /* Largest protocol header */ 1229 extern int nmbclusters; /* Maximum number of clusters */ 1230 extern bool mb_use_ext_pgs; /* Use ext_pgs for sendfile */ 1231 1232 /*- 1233 * Network packets may have annotations attached by affixing a list of 1234 * "packet tags" to the pkthdr structure. Packet tags are dynamically 1235 * allocated semi-opaque data structures that have a fixed header 1236 * (struct m_tag) that specifies the size of the memory block and a 1237 * <cookie,type> pair that identifies it. The cookie is a 32-bit unique 1238 * unsigned value used to identify a module or ABI. By convention this value 1239 * is chosen as the date+time that the module is created, expressed as the 1240 * number of seconds since the epoch (e.g., using date -u +'%s'). The type 1241 * value is an ABI/module-specific value that identifies a particular 1242 * annotation and is private to the module. For compatibility with systems 1243 * like OpenBSD that define packet tags w/o an ABI/module cookie, the value 1244 * PACKET_ABI_COMPAT is used to implement m_tag_get and m_tag_find 1245 * compatibility shim functions and several tag types are defined below. 1246 * Users that do not require compatibility should use a private cookie value 1247 * so that packet tag-related definitions can be maintained privately. 1248 * 1249 * Note that the packet tag returned by m_tag_alloc has the default memory 1250 * alignment implemented by malloc. To reference private data one can use a 1251 * construct like: 1252 * 1253 * struct m_tag *mtag = m_tag_alloc(...); 1254 * struct foo *p = (struct foo *)(mtag+1); 1255 * 1256 * if the alignment of struct m_tag is sufficient for referencing members of 1257 * struct foo. Otherwise it is necessary to embed struct m_tag within the 1258 * private data structure to insure proper alignment; e.g., 1259 * 1260 * struct foo { 1261 * struct m_tag tag; 1262 * ... 1263 * }; 1264 * struct foo *p = (struct foo *) m_tag_alloc(...); 1265 * struct m_tag *mtag = &p->tag; 1266 */ 1267 1268 /* 1269 * Persistent tags stay with an mbuf until the mbuf is reclaimed. Otherwise 1270 * tags are expected to ``vanish'' when they pass through a network 1271 * interface. For most interfaces this happens normally as the tags are 1272 * reclaimed when the mbuf is free'd. However in some special cases 1273 * reclaiming must be done manually. An example is packets that pass through 1274 * the loopback interface. Also, one must be careful to do this when 1275 * ``turning around'' packets (e.g., icmp_reflect). 1276 * 1277 * To mark a tag persistent bit-or this flag in when defining the tag id. 1278 * The tag will then be treated as described above. 1279 */ 1280 #define MTAG_PERSISTENT 0x800 1281 1282 #define PACKET_TAG_NONE 0 /* Nadda */ 1283 1284 /* Packet tags for use with PACKET_ABI_COMPAT. */ 1285 #define PACKET_TAG_IPSEC_IN_DONE 1 /* IPsec applied, in */ 1286 #define PACKET_TAG_IPSEC_OUT_DONE 2 /* IPsec applied, out */ 1287 #define PACKET_TAG_IPSEC_IN_CRYPTO_DONE 3 /* NIC IPsec crypto done */ 1288 #define PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED 4 /* NIC IPsec crypto req'ed */ 1289 #define PACKET_TAG_IPSEC_IN_COULD_DO_CRYPTO 5 /* NIC notifies IPsec */ 1290 #define PACKET_TAG_IPSEC_PENDING_TDB 6 /* Reminder to do IPsec */ 1291 #define PACKET_TAG_BRIDGE 7 /* Bridge processing done */ 1292 #define PACKET_TAG_GIF 8 /* GIF processing done */ 1293 #define PACKET_TAG_GRE 9 /* GRE processing done */ 1294 #define PACKET_TAG_IN_PACKET_CHECKSUM 10 /* NIC checksumming done */ 1295 #define PACKET_TAG_ENCAP 11 /* Encap. processing */ 1296 #define PACKET_TAG_IPSEC_SOCKET 12 /* IPSEC socket ref */ 1297 #define PACKET_TAG_IPSEC_HISTORY 13 /* IPSEC history */ 1298 #define PACKET_TAG_IPV6_INPUT 14 /* IPV6 input processing */ 1299 #define PACKET_TAG_DUMMYNET 15 /* dummynet info */ 1300 #define PACKET_TAG_DIVERT 17 /* divert info */ 1301 #define PACKET_TAG_IPFORWARD 18 /* ipforward info */ 1302 #define PACKET_TAG_MACLABEL (19 | MTAG_PERSISTENT) /* MAC label */ 1303 #define PACKET_TAG_PF (21 | MTAG_PERSISTENT) /* PF/ALTQ information */ 1304 #define PACKET_TAG_RTSOCKFAM 25 /* rtsock sa family */ 1305 #define PACKET_TAG_IPOPTIONS 27 /* Saved IP options */ 1306 #define PACKET_TAG_CARP 28 /* CARP info */ 1307 #define PACKET_TAG_IPSEC_NAT_T_PORTS 29 /* two uint16_t */ 1308 #define PACKET_TAG_ND_OUTGOING 30 /* ND outgoing */ 1309 1310 /* Specific cookies and tags. */ 1311 1312 /* Packet tag routines. */ 1313 struct m_tag *m_tag_alloc(u_int32_t, int, int, int); 1314 void m_tag_delete(struct mbuf *, struct m_tag *); 1315 void m_tag_delete_chain(struct mbuf *, struct m_tag *); 1316 void m_tag_free_default(struct m_tag *); 1317 struct m_tag *m_tag_locate(struct mbuf *, u_int32_t, int, struct m_tag *); 1318 struct m_tag *m_tag_copy(struct m_tag *, int); 1319 int m_tag_copy_chain(struct mbuf *, const struct mbuf *, int); 1320 void m_tag_delete_nonpersistent(struct mbuf *); 1321 1322 /* 1323 * Initialize the list of tags associated with an mbuf. 1324 */ 1325 static __inline void 1326 m_tag_init(struct mbuf *m) 1327 { 1328 1329 SLIST_INIT(&m->m_pkthdr.tags); 1330 } 1331 1332 /* 1333 * Set up the contents of a tag. Note that this does not fill in the free 1334 * method; the caller is expected to do that. 1335 * 1336 * XXX probably should be called m_tag_init, but that was already taken. 1337 */ 1338 static __inline void 1339 m_tag_setup(struct m_tag *t, u_int32_t cookie, int type, int len) 1340 { 1341 1342 t->m_tag_id = type; 1343 t->m_tag_len = len; 1344 t->m_tag_cookie = cookie; 1345 } 1346 1347 /* 1348 * Reclaim resources associated with a tag. 1349 */ 1350 static __inline void 1351 m_tag_free(struct m_tag *t) 1352 { 1353 1354 (*t->m_tag_free)(t); 1355 } 1356 1357 /* 1358 * Return the first tag associated with an mbuf. 1359 */ 1360 static __inline struct m_tag * 1361 m_tag_first(struct mbuf *m) 1362 { 1363 1364 return (SLIST_FIRST(&m->m_pkthdr.tags)); 1365 } 1366 1367 /* 1368 * Return the next tag in the list of tags associated with an mbuf. 1369 */ 1370 static __inline struct m_tag * 1371 m_tag_next(struct mbuf *m __unused, struct m_tag *t) 1372 { 1373 1374 return (SLIST_NEXT(t, m_tag_link)); 1375 } 1376 1377 /* 1378 * Prepend a tag to the list of tags associated with an mbuf. 1379 */ 1380 static __inline void 1381 m_tag_prepend(struct mbuf *m, struct m_tag *t) 1382 { 1383 1384 SLIST_INSERT_HEAD(&m->m_pkthdr.tags, t, m_tag_link); 1385 } 1386 1387 /* 1388 * Unlink a tag from the list of tags associated with an mbuf. 1389 */ 1390 static __inline void 1391 m_tag_unlink(struct mbuf *m, struct m_tag *t) 1392 { 1393 1394 SLIST_REMOVE(&m->m_pkthdr.tags, t, m_tag, m_tag_link); 1395 } 1396 1397 /* These are for OpenBSD compatibility. */ 1398 #define MTAG_ABI_COMPAT 0 /* compatibility ABI */ 1399 1400 static __inline struct m_tag * 1401 m_tag_get(int type, int length, int wait) 1402 { 1403 return (m_tag_alloc(MTAG_ABI_COMPAT, type, length, wait)); 1404 } 1405 1406 static __inline struct m_tag * 1407 m_tag_find(struct mbuf *m, int type, struct m_tag *start) 1408 { 1409 return (SLIST_EMPTY(&m->m_pkthdr.tags) ? (struct m_tag *)NULL : 1410 m_tag_locate(m, MTAG_ABI_COMPAT, type, start)); 1411 } 1412 1413 static inline struct m_snd_tag * 1414 m_snd_tag_ref(struct m_snd_tag *mst) 1415 { 1416 1417 refcount_acquire(&mst->refcount); 1418 return (mst); 1419 } 1420 1421 static inline void 1422 m_snd_tag_rele(struct m_snd_tag *mst) 1423 { 1424 1425 if (refcount_release(&mst->refcount)) 1426 m_snd_tag_destroy(mst); 1427 } 1428 1429 static __inline struct mbuf * 1430 m_free(struct mbuf *m) 1431 { 1432 struct mbuf *n = m->m_next; 1433 1434 MBUF_PROBE1(m__free, m); 1435 if ((m->m_flags & (M_PKTHDR|M_NOFREE)) == (M_PKTHDR|M_NOFREE)) 1436 m_tag_delete_chain(m, NULL); 1437 if (m->m_flags & M_PKTHDR && m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1438 m_snd_tag_rele(m->m_pkthdr.snd_tag); 1439 if (m->m_flags & M_EXTPG) 1440 mb_free_extpg(m); 1441 else if (m->m_flags & M_EXT) 1442 mb_free_ext(m); 1443 else if ((m->m_flags & M_NOFREE) == 0) 1444 uma_zfree(zone_mbuf, m); 1445 return (n); 1446 } 1447 1448 static __inline int 1449 rt_m_getfib(struct mbuf *m) 1450 { 1451 KASSERT(m->m_flags & M_PKTHDR , ("Attempt to get FIB from non header mbuf.")); 1452 return (m->m_pkthdr.fibnum); 1453 } 1454 1455 #define M_GETFIB(_m) rt_m_getfib(_m) 1456 1457 #define M_SETFIB(_m, _fib) do { \ 1458 KASSERT((_m)->m_flags & M_PKTHDR, ("Attempt to set FIB on non header mbuf.")); \ 1459 ((_m)->m_pkthdr.fibnum) = (_fib); \ 1460 } while (0) 1461 1462 /* flags passed as first argument for "m_xxx_tcpip_hash()" */ 1463 #define MBUF_HASHFLAG_L2 (1 << 2) 1464 #define MBUF_HASHFLAG_L3 (1 << 3) 1465 #define MBUF_HASHFLAG_L4 (1 << 4) 1466 1467 /* mbuf hashing helper routines */ 1468 uint32_t m_ether_tcpip_hash_init(void); 1469 uint32_t m_ether_tcpip_hash(const uint32_t, const struct mbuf *, uint32_t); 1470 uint32_t m_infiniband_tcpip_hash_init(void); 1471 uint32_t m_infiniband_tcpip_hash(const uint32_t, const struct mbuf *, uint32_t); 1472 1473 #ifdef MBUF_PROFILING 1474 void m_profile(struct mbuf *m); 1475 #define M_PROFILE(m) m_profile(m) 1476 #else 1477 #define M_PROFILE(m) 1478 #endif 1479 1480 struct mbufq { 1481 STAILQ_HEAD(, mbuf) mq_head; 1482 int mq_len; 1483 int mq_maxlen; 1484 }; 1485 1486 static inline void 1487 mbufq_init(struct mbufq *mq, int maxlen) 1488 { 1489 1490 STAILQ_INIT(&mq->mq_head); 1491 mq->mq_maxlen = maxlen; 1492 mq->mq_len = 0; 1493 } 1494 1495 static inline struct mbuf * 1496 mbufq_flush(struct mbufq *mq) 1497 { 1498 struct mbuf *m; 1499 1500 m = STAILQ_FIRST(&mq->mq_head); 1501 STAILQ_INIT(&mq->mq_head); 1502 mq->mq_len = 0; 1503 return (m); 1504 } 1505 1506 static inline void 1507 mbufq_drain(struct mbufq *mq) 1508 { 1509 struct mbuf *m, *n; 1510 1511 n = mbufq_flush(mq); 1512 while ((m = n) != NULL) { 1513 n = STAILQ_NEXT(m, m_stailqpkt); 1514 m_freem(m); 1515 } 1516 } 1517 1518 static inline struct mbuf * 1519 mbufq_first(const struct mbufq *mq) 1520 { 1521 1522 return (STAILQ_FIRST(&mq->mq_head)); 1523 } 1524 1525 static inline struct mbuf * 1526 mbufq_last(const struct mbufq *mq) 1527 { 1528 1529 return (STAILQ_LAST(&mq->mq_head, mbuf, m_stailqpkt)); 1530 } 1531 1532 static inline int 1533 mbufq_full(const struct mbufq *mq) 1534 { 1535 1536 return (mq->mq_maxlen > 0 && mq->mq_len >= mq->mq_maxlen); 1537 } 1538 1539 static inline int 1540 mbufq_len(const struct mbufq *mq) 1541 { 1542 1543 return (mq->mq_len); 1544 } 1545 1546 static inline int 1547 mbufq_enqueue(struct mbufq *mq, struct mbuf *m) 1548 { 1549 1550 if (mbufq_full(mq)) 1551 return (ENOBUFS); 1552 STAILQ_INSERT_TAIL(&mq->mq_head, m, m_stailqpkt); 1553 mq->mq_len++; 1554 return (0); 1555 } 1556 1557 static inline struct mbuf * 1558 mbufq_dequeue(struct mbufq *mq) 1559 { 1560 struct mbuf *m; 1561 1562 m = STAILQ_FIRST(&mq->mq_head); 1563 if (m) { 1564 STAILQ_REMOVE_HEAD(&mq->mq_head, m_stailqpkt); 1565 m->m_nextpkt = NULL; 1566 mq->mq_len--; 1567 } 1568 return (m); 1569 } 1570 1571 static inline void 1572 mbufq_prepend(struct mbufq *mq, struct mbuf *m) 1573 { 1574 1575 STAILQ_INSERT_HEAD(&mq->mq_head, m, m_stailqpkt); 1576 mq->mq_len++; 1577 } 1578 1579 /* 1580 * Note: this doesn't enforce the maximum list size for dst. 1581 */ 1582 static inline void 1583 mbufq_concat(struct mbufq *mq_dst, struct mbufq *mq_src) 1584 { 1585 1586 mq_dst->mq_len += mq_src->mq_len; 1587 STAILQ_CONCAT(&mq_dst->mq_head, &mq_src->mq_head); 1588 mq_src->mq_len = 0; 1589 } 1590 1591 #ifdef _SYS_TIMESPEC_H_ 1592 static inline void 1593 mbuf_tstmp2timespec(struct mbuf *m, struct timespec *ts) 1594 { 1595 1596 KASSERT((m->m_flags & M_PKTHDR) != 0, ("mbuf %p no M_PKTHDR", m)); 1597 KASSERT((m->m_flags & (M_TSTMP|M_TSTMP_LRO)) != 0, ("mbuf %p no M_TSTMP or M_TSTMP_LRO", m)); 1598 ts->tv_sec = m->m_pkthdr.rcv_tstmp / 1000000000; 1599 ts->tv_nsec = m->m_pkthdr.rcv_tstmp % 1000000000; 1600 } 1601 #endif 1602 1603 #ifdef DEBUGNET 1604 /* Invoked from the debugnet client code. */ 1605 void debugnet_mbuf_drain(void); 1606 void debugnet_mbuf_start(void); 1607 void debugnet_mbuf_finish(void); 1608 void debugnet_mbuf_reinit(int nmbuf, int nclust, int clsize); 1609 #endif 1610 1611 static inline bool 1612 mbuf_has_tls_session(struct mbuf *m) 1613 { 1614 1615 if (m->m_flags & M_EXTPG) { 1616 if (m->m_epg_tls != NULL) { 1617 return (true); 1618 } 1619 } 1620 return (false); 1621 } 1622 1623 #endif /* _KERNEL */ 1624 #endif /* !_SYS_MBUF_H_ */ 1625