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 tcp_tun_port PH_per.sixteen[0] /* outbound */ 202 #define PH_vt PH_per 203 #define vt_nrecs sixteen[0] /* mld and v6-ND */ 204 #define tso_segsz PH_per.sixteen[1] /* inbound after LRO */ 205 #define lro_nsegs tso_segsz /* inbound after LRO */ 206 #define csum_data PH_per.thirtytwo[1] /* inbound from hardware up */ 207 #define lro_len PH_loc.sixteen[0] /* inbound during LRO (no reassembly) */ 208 #define lro_csum PH_loc.sixteen[1] /* inbound during LRO (no reassembly) */ 209 #define lro_etype PH_loc.sixteen[2] /* inbound during LRO (no reassembly) */ 210 /* Note PH_loc is used during IP reassembly (all 8 bytes as a ptr) */ 211 212 /* 213 * TLS records for TLS 1.0-1.2 can have the following header lengths: 214 * - 5 (AES-CBC with implicit IV) 215 * - 21 (AES-CBC with explicit IV) 216 * - 13 (AES-GCM with 8 byte explicit IV) 217 */ 218 #define MBUF_PEXT_HDR_LEN 23 219 220 /* 221 * TLS records for TLS 1.0-1.2 can have the following maximum trailer 222 * lengths: 223 * - 16 (AES-GCM) 224 * - 36 (AES-CBC with SHA1 and up to 16 bytes of padding) 225 * - 48 (AES-CBC with SHA2-256 and up to 16 bytes of padding) 226 * - 64 (AES-CBC with SHA2-384 and up to 16 bytes of padding) 227 */ 228 #define MBUF_PEXT_TRAIL_LEN 64 229 230 #if defined(__LP64__) 231 #define MBUF_PEXT_MAX_PGS (40 / sizeof(vm_paddr_t)) 232 #else 233 #define MBUF_PEXT_MAX_PGS (72 / sizeof(vm_paddr_t)) 234 #endif 235 236 #define MBUF_PEXT_MAX_BYTES \ 237 (MBUF_PEXT_MAX_PGS * PAGE_SIZE + MBUF_PEXT_HDR_LEN + MBUF_PEXT_TRAIL_LEN) 238 239 struct ktls_session; 240 struct socket; 241 242 /* 243 * Description of external storage mapped into mbuf; valid only if M_EXT is 244 * set. 245 * Size ILP32: 28 246 * LP64: 48 247 * Compile-time assertions in uipc_mbuf.c test these values to ensure that 248 * they are correct. 249 */ 250 typedef void m_ext_free_t(struct mbuf *); 251 struct m_ext { 252 union { 253 /* 254 * If EXT_FLAG_EMBREF is set, then we use refcount in the 255 * mbuf, the 'ext_count' member. Otherwise, we have a 256 * shadow copy and we use pointer 'ext_cnt'. The original 257 * mbuf is responsible to carry the pointer to free routine 258 * and its arguments. They aren't copied into shadows in 259 * mb_dupcl() to avoid dereferencing next cachelines. 260 */ 261 volatile u_int ext_count; 262 volatile u_int *ext_cnt; 263 }; 264 uint32_t ext_size; /* size of buffer, for ext_free */ 265 uint32_t ext_type:8, /* type of external storage */ 266 ext_flags:24; /* external storage mbuf flags */ 267 union { 268 struct { 269 /* 270 * Regular M_EXT mbuf: 271 * o ext_buf always points to the external buffer. 272 * o ext_free (below) and two optional arguments 273 * ext_arg1 and ext_arg2 store the free context for 274 * the external storage. They are set only in the 275 * refcount carrying mbuf, the one with 276 * EXT_FLAG_EMBREF flag, with exclusion for 277 * EXT_EXTREF type, where the free context is copied 278 * into all mbufs that use same external storage. 279 */ 280 char *ext_buf; /* start of buffer */ 281 #define m_ext_copylen offsetof(struct m_ext, ext_arg2) 282 void *ext_arg2; 283 }; 284 struct { 285 /* 286 * Multi-page M_EXTPG mbuf: 287 * o extpg_pa - page vector. 288 * o extpg_trail and extpg_hdr - TLS trailer and 289 * header. 290 * Uses ext_free and may also use ext_arg1. 291 */ 292 vm_paddr_t extpg_pa[MBUF_PEXT_MAX_PGS]; 293 char extpg_trail[MBUF_PEXT_TRAIL_LEN]; 294 char extpg_hdr[MBUF_PEXT_HDR_LEN]; 295 /* Pretend these 3 fields are part of mbuf itself. */ 296 #define m_epg_pa m_ext.extpg_pa 297 #define m_epg_trail m_ext.extpg_trail 298 #define m_epg_hdr m_ext.extpg_hdr 299 #define m_epg_ext_copylen offsetof(struct m_ext, ext_free) 300 }; 301 }; 302 /* 303 * Free method and optional argument pointer, both 304 * used by M_EXT and M_EXTPG. 305 */ 306 m_ext_free_t *ext_free; 307 void *ext_arg1; 308 }; 309 310 /* 311 * The core of the mbuf object along with some shortcut defines for practical 312 * purposes. 313 */ 314 struct mbuf { 315 /* 316 * Header present at the beginning of every mbuf. 317 * Size ILP32: 24 318 * LP64: 32 319 * Compile-time assertions in uipc_mbuf.c test these values to ensure 320 * that they are correct. 321 */ 322 union { /* next buffer in chain */ 323 struct mbuf *m_next; 324 SLIST_ENTRY(mbuf) m_slist; 325 STAILQ_ENTRY(mbuf) m_stailq; 326 }; 327 union { /* next chain in queue/record */ 328 struct mbuf *m_nextpkt; 329 SLIST_ENTRY(mbuf) m_slistpkt; 330 STAILQ_ENTRY(mbuf) m_stailqpkt; 331 }; 332 caddr_t m_data; /* location of data */ 333 int32_t m_len; /* amount of data in this mbuf */ 334 uint32_t m_type:8, /* type of data in this mbuf */ 335 m_flags:24; /* flags; see below */ 336 #if !defined(__LP64__) 337 uint32_t m_pad; /* pad for 64bit alignment */ 338 #endif 339 340 /* 341 * A set of optional headers (packet header, external storage header) 342 * and internal data storage. Historically, these arrays were sized 343 * to MHLEN (space left after a packet header) and MLEN (space left 344 * after only a regular mbuf header); they are now variable size in 345 * order to support future work on variable-size mbufs. 346 */ 347 union { 348 struct { 349 union { 350 /* M_PKTHDR set. */ 351 struct pkthdr m_pkthdr; 352 353 /* M_EXTPG set. 354 * Multi-page M_EXTPG mbuf has its meta data 355 * split between the below anonymous structure 356 * and m_ext. It carries vector of pages, 357 * optional header and trailer char vectors 358 * and pointers to socket/TLS data. 359 */ 360 #define m_epg_startcopy m_epg_npgs 361 #define m_epg_endcopy m_epg_stailq 362 struct { 363 /* Overall count of pages and count of 364 * pages with I/O pending. */ 365 uint8_t m_epg_npgs; 366 uint8_t m_epg_nrdy; 367 /* TLS header and trailer lengths. 368 * The data itself resides in m_ext. */ 369 uint8_t m_epg_hdrlen; 370 uint8_t m_epg_trllen; 371 /* Offset into 1st page and length of 372 * data in the last page. */ 373 uint16_t m_epg_1st_off; 374 uint16_t m_epg_last_len; 375 uint8_t m_epg_flags; 376 #define EPG_FLAG_ANON 0x1 /* Data can be encrypted in place. */ 377 #define EPG_FLAG_2FREE 0x2 /* Scheduled for free. */ 378 uint8_t m_epg_record_type; 379 uint8_t __spare[2]; 380 int m_epg_enc_cnt; 381 struct ktls_session *m_epg_tls; 382 struct socket *m_epg_so; 383 uint64_t m_epg_seqno; 384 STAILQ_ENTRY(mbuf) m_epg_stailq; 385 }; 386 }; 387 union { 388 /* M_EXT or M_EXTPG set. */ 389 struct m_ext m_ext; 390 /* M_PKTHDR set, neither M_EXT nor M_EXTPG. */ 391 char m_pktdat[0]; 392 }; 393 }; 394 char m_dat[0]; /* !M_PKTHDR, !M_EXT */ 395 }; 396 }; 397 398 #ifdef _KERNEL 399 static inline int 400 m_epg_pagelen(const struct mbuf *m, int pidx, int pgoff) 401 { 402 403 KASSERT(pgoff == 0 || pidx == 0, 404 ("page %d with non-zero offset %d in %p", pidx, pgoff, m)); 405 406 if (pidx == m->m_epg_npgs - 1) { 407 return (m->m_epg_last_len); 408 } else { 409 return (PAGE_SIZE - pgoff); 410 } 411 } 412 413 #ifdef INVARIANTS 414 #define MCHECK(ex, msg) KASSERT((ex), \ 415 ("Multi page mbuf %p with " #msg " at %s:%d", \ 416 m, __FILE__, __LINE__)) 417 /* 418 * NB: This expects a non-empty buffer (npgs > 0 and 419 * last_pg_len > 0). 420 */ 421 #define MBUF_EXT_PGS_ASSERT_SANITY(m) do { \ 422 MCHECK(m->m_epg_npgs > 0, "no valid pages"); \ 423 MCHECK(m->m_epg_npgs <= nitems(m->m_epg_pa), \ 424 "too many pages"); \ 425 MCHECK(m->m_epg_nrdy <= m->m_epg_npgs, \ 426 "too many ready pages"); \ 427 MCHECK(m->m_epg_1st_off < PAGE_SIZE, \ 428 "too large page offset"); \ 429 MCHECK(m->m_epg_last_len > 0, "zero last page length"); \ 430 MCHECK(m->m_epg_last_len <= PAGE_SIZE, \ 431 "too large last page length"); \ 432 if (m->m_epg_npgs == 1) \ 433 MCHECK(m->m_epg_1st_off + \ 434 m->m_epg_last_len <= PAGE_SIZE, \ 435 "single page too large"); \ 436 MCHECK(m->m_epg_hdrlen <= sizeof(m->m_epg_hdr), \ 437 "too large header length"); \ 438 MCHECK(m->m_epg_trllen <= sizeof(m->m_epg_trail), \ 439 "too large header length"); \ 440 } while (0) 441 #else 442 #define MBUF_EXT_PGS_ASSERT_SANITY(m) do {} while (0); 443 #endif 444 #endif 445 446 /* 447 * mbuf flags of global significance and layer crossing. 448 * Those of only protocol/layer specific significance are to be mapped 449 * to M_PROTO[1-11] and cleared at layer handoff boundaries. 450 * NB: Limited to the lower 24 bits. 451 */ 452 #define M_EXT 0x00000001 /* has associated external storage */ 453 #define M_PKTHDR 0x00000002 /* start of record */ 454 #define M_EOR 0x00000004 /* end of record */ 455 #define M_RDONLY 0x00000008 /* associated data is marked read-only */ 456 #define M_BCAST 0x00000010 /* send/received as link-level broadcast */ 457 #define M_MCAST 0x00000020 /* send/received as link-level multicast */ 458 #define M_PROMISC 0x00000040 /* packet was not for us */ 459 #define M_VLANTAG 0x00000080 /* ether_vtag is valid */ 460 #define M_EXTPG 0x00000100 /* has array of unmapped pages and TLS */ 461 #define M_NOFREE 0x00000200 /* do not free mbuf, embedded in cluster */ 462 #define M_TSTMP 0x00000400 /* rcv_tstmp field is valid */ 463 #define M_TSTMP_HPREC 0x00000800 /* rcv_tstmp is high-prec, typically 464 hw-stamped on port (useful for IEEE 1588 465 and 802.1AS) */ 466 #define M_TSTMP_LRO 0x00001000 /* Time LRO pushed in pkt is valid in (PH_loc) */ 467 468 #define M_PROTO1 0x00002000 /* protocol-specific */ 469 #define M_PROTO2 0x00004000 /* protocol-specific */ 470 #define M_PROTO3 0x00008000 /* protocol-specific */ 471 #define M_PROTO4 0x00010000 /* protocol-specific */ 472 #define M_PROTO5 0x00020000 /* protocol-specific */ 473 #define M_PROTO6 0x00040000 /* protocol-specific */ 474 #define M_PROTO7 0x00080000 /* protocol-specific */ 475 #define M_PROTO8 0x00100000 /* protocol-specific */ 476 #define M_PROTO9 0x00200000 /* protocol-specific */ 477 #define M_PROTO10 0x00400000 /* protocol-specific */ 478 #define M_PROTO11 0x00800000 /* protocol-specific */ 479 480 #define MB_DTOR_SKIP 0x1 /* don't pollute the cache by touching a freed mbuf */ 481 482 /* 483 * Flags to purge when crossing layers. 484 */ 485 #define M_PROTOFLAGS \ 486 (M_PROTO1|M_PROTO2|M_PROTO3|M_PROTO4|M_PROTO5|M_PROTO6|M_PROTO7|M_PROTO8|\ 487 M_PROTO9|M_PROTO10|M_PROTO11) 488 489 /* 490 * Flags preserved when copying m_pkthdr. 491 */ 492 #define M_COPYFLAGS \ 493 (M_PKTHDR|M_EOR|M_RDONLY|M_BCAST|M_MCAST|M_PROMISC|M_VLANTAG|M_TSTMP| \ 494 M_TSTMP_HPREC|M_TSTMP_LRO|M_PROTOFLAGS) 495 496 /* 497 * Mbuf flag description for use with printf(9) %b identifier. 498 */ 499 #define M_FLAG_BITS \ 500 "\20\1M_EXT\2M_PKTHDR\3M_EOR\4M_RDONLY\5M_BCAST\6M_MCAST" \ 501 "\7M_PROMISC\10M_VLANTAG\11M_EXTPG\12M_NOFREE\13M_TSTMP\14M_TSTMP_HPREC\15M_TSTMP_LRO" 502 #define M_FLAG_PROTOBITS \ 503 "\16M_PROTO1\17M_PROTO2\20M_PROTO3\21M_PROTO4" \ 504 "\22M_PROTO5\23M_PROTO6\24M_PROTO7\25M_PROTO8\26M_PROTO9" \ 505 "\27M_PROTO10\28M_PROTO11" 506 #define M_FLAG_PRINTF (M_FLAG_BITS M_FLAG_PROTOBITS) 507 508 /* 509 * Network interface cards are able to hash protocol fields (such as IPv4 510 * addresses and TCP port numbers) classify packets into flows. These flows 511 * can then be used to maintain ordering while delivering packets to the OS 512 * via parallel input queues, as well as to provide a stateless affinity 513 * model. NIC drivers can pass up the hash via m->m_pkthdr.flowid, and set 514 * m_flag fields to indicate how the hash should be interpreted by the 515 * network stack. 516 * 517 * Most NICs support RSS, which provides ordering and explicit affinity, and 518 * use the hash m_flag bits to indicate what header fields were covered by 519 * the hash. M_HASHTYPE_OPAQUE and M_HASHTYPE_OPAQUE_HASH can be set by non- 520 * RSS cards or configurations that provide an opaque flow identifier, allowing 521 * for ordering and distribution without explicit affinity. Additionally, 522 * M_HASHTYPE_OPAQUE_HASH indicates that the flow identifier has hash 523 * properties. 524 * 525 * The meaning of the IPV6_EX suffix: 526 * "o Home address from the home address option in the IPv6 destination 527 * options header. If the extension header is not present, use the Source 528 * IPv6 Address. 529 * o IPv6 address that is contained in the Routing-Header-Type-2 from the 530 * associated extension header. If the extension header is not present, 531 * use the Destination IPv6 Address." 532 * Quoted from: 533 * https://docs.microsoft.com/en-us/windows-hardware/drivers/network/rss-hashing-types#ndishashipv6ex 534 */ 535 #define M_HASHTYPE_HASHPROP 0x80 /* has hash properties */ 536 #define M_HASHTYPE_INNER 0x40 /* calculated from inner headers */ 537 #define M_HASHTYPE_HASH(t) (M_HASHTYPE_HASHPROP | (t)) 538 /* Microsoft RSS standard hash types */ 539 #define M_HASHTYPE_NONE 0 540 #define M_HASHTYPE_RSS_IPV4 M_HASHTYPE_HASH(1) /* IPv4 2-tuple */ 541 #define M_HASHTYPE_RSS_TCP_IPV4 M_HASHTYPE_HASH(2) /* TCPv4 4-tuple */ 542 #define M_HASHTYPE_RSS_IPV6 M_HASHTYPE_HASH(3) /* IPv6 2-tuple */ 543 #define M_HASHTYPE_RSS_TCP_IPV6 M_HASHTYPE_HASH(4) /* TCPv6 4-tuple */ 544 #define M_HASHTYPE_RSS_IPV6_EX M_HASHTYPE_HASH(5) /* IPv6 2-tuple + 545 * ext hdrs */ 546 #define M_HASHTYPE_RSS_TCP_IPV6_EX M_HASHTYPE_HASH(6) /* TCPv6 4-tuple + 547 * ext hdrs */ 548 #define M_HASHTYPE_RSS_UDP_IPV4 M_HASHTYPE_HASH(7) /* IPv4 UDP 4-tuple*/ 549 #define M_HASHTYPE_RSS_UDP_IPV6 M_HASHTYPE_HASH(9) /* IPv6 UDP 4-tuple*/ 550 #define M_HASHTYPE_RSS_UDP_IPV6_EX M_HASHTYPE_HASH(10)/* IPv6 UDP 4-tuple + 551 * ext hdrs */ 552 553 #define M_HASHTYPE_OPAQUE 0x3f /* ordering, not affinity */ 554 #define M_HASHTYPE_OPAQUE_HASH M_HASHTYPE_HASH(M_HASHTYPE_OPAQUE) 555 /* ordering+hash, not affinity*/ 556 557 #define M_HASHTYPE_CLEAR(m) ((m)->m_pkthdr.rsstype = 0) 558 #define M_HASHTYPE_GET(m) ((m)->m_pkthdr.rsstype & ~M_HASHTYPE_INNER) 559 #define M_HASHTYPE_SET(m, v) ((m)->m_pkthdr.rsstype = (v)) 560 #define M_HASHTYPE_TEST(m, v) (M_HASHTYPE_GET(m) == (v)) 561 #define M_HASHTYPE_ISHASH(m) \ 562 (((m)->m_pkthdr.rsstype & M_HASHTYPE_HASHPROP) != 0) 563 #define M_HASHTYPE_SETINNER(m) do { \ 564 (m)->m_pkthdr.rsstype |= M_HASHTYPE_INNER; \ 565 } while (0) 566 567 /* 568 * External mbuf storage buffer types. 569 */ 570 #define EXT_CLUSTER 1 /* mbuf cluster */ 571 #define EXT_SFBUF 2 /* sendfile(2)'s sf_buf */ 572 #define EXT_JUMBOP 3 /* jumbo cluster page sized */ 573 #define EXT_JUMBO9 4 /* jumbo cluster 9216 bytes */ 574 #define EXT_JUMBO16 5 /* jumbo cluster 16184 bytes */ 575 #define EXT_PACKET 6 /* mbuf+cluster from packet zone */ 576 #define EXT_MBUF 7 /* external mbuf reference */ 577 #define EXT_RXRING 8 /* data in NIC receive ring */ 578 579 #define EXT_VENDOR1 224 /* for vendor-internal use */ 580 #define EXT_VENDOR2 225 /* for vendor-internal use */ 581 #define EXT_VENDOR3 226 /* for vendor-internal use */ 582 #define EXT_VENDOR4 227 /* for vendor-internal use */ 583 584 #define EXT_EXP1 244 /* for experimental use */ 585 #define EXT_EXP2 245 /* for experimental use */ 586 #define EXT_EXP3 246 /* for experimental use */ 587 #define EXT_EXP4 247 /* for experimental use */ 588 589 #define EXT_NET_DRV 252 /* custom ext_buf provided by net driver(s) */ 590 #define EXT_MOD_TYPE 253 /* custom module's ext_buf type */ 591 #define EXT_DISPOSABLE 254 /* can throw this buffer away w/page flipping */ 592 #define EXT_EXTREF 255 /* has externally maintained ext_cnt ptr */ 593 594 /* 595 * Flags for external mbuf buffer types. 596 * NB: limited to the lower 24 bits. 597 */ 598 #define EXT_FLAG_EMBREF 0x000001 /* embedded ext_count */ 599 #define EXT_FLAG_EXTREF 0x000002 /* external ext_cnt, notyet */ 600 601 #define EXT_FLAG_NOFREE 0x000010 /* don't free mbuf to pool, notyet */ 602 603 #define EXT_FLAG_VENDOR1 0x010000 /* These flags are vendor */ 604 #define EXT_FLAG_VENDOR2 0x020000 /* or submodule specific, */ 605 #define EXT_FLAG_VENDOR3 0x040000 /* not used by mbuf code. */ 606 #define EXT_FLAG_VENDOR4 0x080000 /* Set/read by submodule. */ 607 608 #define EXT_FLAG_EXP1 0x100000 /* for experimental use */ 609 #define EXT_FLAG_EXP2 0x200000 /* for experimental use */ 610 #define EXT_FLAG_EXP3 0x400000 /* for experimental use */ 611 #define EXT_FLAG_EXP4 0x800000 /* for experimental use */ 612 613 /* 614 * EXT flag description for use with printf(9) %b identifier. 615 */ 616 #define EXT_FLAG_BITS \ 617 "\20\1EXT_FLAG_EMBREF\2EXT_FLAG_EXTREF\5EXT_FLAG_NOFREE" \ 618 "\21EXT_FLAG_VENDOR1\22EXT_FLAG_VENDOR2\23EXT_FLAG_VENDOR3" \ 619 "\24EXT_FLAG_VENDOR4\25EXT_FLAG_EXP1\26EXT_FLAG_EXP2\27EXT_FLAG_EXP3" \ 620 "\30EXT_FLAG_EXP4" 621 622 /* 623 * Flags indicating checksum, segmentation and other offload work to be 624 * done, or already done, by hardware or lower layers. It is split into 625 * separate inbound and outbound flags. 626 * 627 * Outbound flags that are set by upper protocol layers requesting lower 628 * layers, or ideally the hardware, to perform these offloading tasks. 629 * For outbound packets this field and its flags can be directly tested 630 * against ifnet if_hwassist. Note that the outbound and the inbound flags do 631 * not collide right now but they could be allowed to (as long as the flags are 632 * scrubbed appropriately when the direction of an mbuf changes). CSUM_BITS 633 * would also have to split into CSUM_BITS_TX and CSUM_BITS_RX. 634 * 635 * CSUM_INNER_<x> is the same as CSUM_<x> but it applies to the inner frame. 636 * The CSUM_ENCAP_<x> bits identify the outer encapsulation. 637 */ 638 #define CSUM_IP 0x00000001 /* IP header checksum offload */ 639 #define CSUM_IP_UDP 0x00000002 /* UDP checksum offload */ 640 #define CSUM_IP_TCP 0x00000004 /* TCP checksum offload */ 641 #define CSUM_IP_SCTP 0x00000008 /* SCTP checksum offload */ 642 #define CSUM_IP_TSO 0x00000010 /* TCP segmentation offload */ 643 #define CSUM_IP_ISCSI 0x00000020 /* iSCSI checksum offload */ 644 645 #define CSUM_INNER_IP6_UDP 0x00000040 646 #define CSUM_INNER_IP6_TCP 0x00000080 647 #define CSUM_INNER_IP6_TSO 0x00000100 648 #define CSUM_IP6_UDP 0x00000200 /* UDP checksum offload */ 649 #define CSUM_IP6_TCP 0x00000400 /* TCP checksum offload */ 650 #define CSUM_IP6_SCTP 0x00000800 /* SCTP checksum offload */ 651 #define CSUM_IP6_TSO 0x00001000 /* TCP segmentation offload */ 652 #define CSUM_IP6_ISCSI 0x00002000 /* iSCSI checksum offload */ 653 654 #define CSUM_INNER_IP 0x00004000 655 #define CSUM_INNER_IP_UDP 0x00008000 656 #define CSUM_INNER_IP_TCP 0x00010000 657 #define CSUM_INNER_IP_TSO 0x00020000 658 659 #define CSUM_ENCAP_VXLAN 0x00040000 /* VXLAN outer encapsulation */ 660 #define CSUM_ENCAP_RSVD1 0x00080000 661 662 /* Inbound checksum support where the checksum was verified by hardware. */ 663 #define CSUM_INNER_L3_CALC 0x00100000 664 #define CSUM_INNER_L3_VALID 0x00200000 665 #define CSUM_INNER_L4_CALC 0x00400000 666 #define CSUM_INNER_L4_VALID 0x00800000 667 #define CSUM_L3_CALC 0x01000000 /* calculated layer 3 csum */ 668 #define CSUM_L3_VALID 0x02000000 /* checksum is correct */ 669 #define CSUM_L4_CALC 0x04000000 /* calculated layer 4 csum */ 670 #define CSUM_L4_VALID 0x08000000 /* checksum is correct */ 671 #define CSUM_L5_CALC 0x10000000 /* calculated layer 5 csum */ 672 #define CSUM_L5_VALID 0x20000000 /* checksum is correct */ 673 #define CSUM_COALESCED 0x40000000 /* contains merged segments */ 674 675 #define CSUM_SND_TAG 0x80000000 /* Packet header has send tag */ 676 677 #define CSUM_FLAGS_TX (CSUM_IP | CSUM_IP_UDP | CSUM_IP_TCP | CSUM_IP_SCTP | \ 678 CSUM_IP_TSO | CSUM_IP_ISCSI | CSUM_INNER_IP6_UDP | CSUM_INNER_IP6_TCP | \ 679 CSUM_INNER_IP6_TSO | CSUM_IP6_UDP | CSUM_IP6_TCP | CSUM_IP6_SCTP | \ 680 CSUM_IP6_TSO | CSUM_IP6_ISCSI | CSUM_INNER_IP | CSUM_INNER_IP_UDP | \ 681 CSUM_INNER_IP_TCP | CSUM_INNER_IP_TSO | CSUM_ENCAP_VXLAN | \ 682 CSUM_ENCAP_RSVD1 | CSUM_SND_TAG) 683 684 #define CSUM_FLAGS_RX (CSUM_INNER_L3_CALC | CSUM_INNER_L3_VALID | \ 685 CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID | CSUM_L3_CALC | CSUM_L3_VALID | \ 686 CSUM_L4_CALC | CSUM_L4_VALID | CSUM_L5_CALC | CSUM_L5_VALID | \ 687 CSUM_COALESCED) 688 689 /* 690 * CSUM flag description for use with printf(9) %b identifier. 691 */ 692 #define CSUM_BITS \ 693 "\20\1CSUM_IP\2CSUM_IP_UDP\3CSUM_IP_TCP\4CSUM_IP_SCTP\5CSUM_IP_TSO" \ 694 "\6CSUM_IP_ISCSI\7CSUM_INNER_IP6_UDP\10CSUM_INNER_IP6_TCP" \ 695 "\11CSUM_INNER_IP6_TSO\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP" \ 696 "\15CSUM_IP6_TSO\16CSUM_IP6_ISCSI\17CSUM_INNER_IP\20CSUM_INNER_IP_UDP" \ 697 "\21CSUM_INNER_IP_TCP\22CSUM_INNER_IP_TSO\23CSUM_ENCAP_VXLAN" \ 698 "\24CSUM_ENCAP_RSVD1\25CSUM_INNER_L3_CALC\26CSUM_INNER_L3_VALID" \ 699 "\27CSUM_INNER_L4_CALC\30CSUM_INNER_L4_VALID\31CSUM_L3_CALC" \ 700 "\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID\35CSUM_L5_CALC" \ 701 "\36CSUM_L5_VALID\37CSUM_COALESCED\40CSUM_SND_TAG" 702 703 /* CSUM flags compatibility mappings. */ 704 #define CSUM_IP_CHECKED CSUM_L3_CALC 705 #define CSUM_IP_VALID CSUM_L3_VALID 706 #define CSUM_DATA_VALID CSUM_L4_VALID 707 #define CSUM_PSEUDO_HDR CSUM_L4_CALC 708 #define CSUM_SCTP_VALID CSUM_L4_VALID 709 #define CSUM_DELAY_DATA (CSUM_TCP|CSUM_UDP) 710 #define CSUM_DELAY_IP CSUM_IP /* Only v4, no v6 IP hdr csum */ 711 #define CSUM_DELAY_DATA_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6) 712 #define CSUM_DATA_VALID_IPV6 CSUM_DATA_VALID 713 #define CSUM_TCP CSUM_IP_TCP 714 #define CSUM_UDP CSUM_IP_UDP 715 #define CSUM_SCTP CSUM_IP_SCTP 716 #define CSUM_TSO (CSUM_IP_TSO|CSUM_IP6_TSO) 717 #define CSUM_INNER_TSO (CSUM_INNER_IP_TSO|CSUM_INNER_IP6_TSO) 718 #define CSUM_UDP_IPV6 CSUM_IP6_UDP 719 #define CSUM_TCP_IPV6 CSUM_IP6_TCP 720 #define CSUM_SCTP_IPV6 CSUM_IP6_SCTP 721 722 /* 723 * mbuf types describing the content of the mbuf (including external storage). 724 */ 725 #define MT_NOTMBUF 0 /* USED INTERNALLY ONLY! Object is not mbuf */ 726 #define MT_DATA 1 /* dynamic (data) allocation */ 727 #define MT_HEADER MT_DATA /* packet header, use M_PKTHDR instead */ 728 729 #define MT_VENDOR1 4 /* for vendor-internal use */ 730 #define MT_VENDOR2 5 /* for vendor-internal use */ 731 #define MT_VENDOR3 6 /* for vendor-internal use */ 732 #define MT_VENDOR4 7 /* for vendor-internal use */ 733 734 #define MT_SONAME 8 /* socket name */ 735 736 #define MT_EXP1 9 /* for experimental use */ 737 #define MT_EXP2 10 /* for experimental use */ 738 #define MT_EXP3 11 /* for experimental use */ 739 #define MT_EXP4 12 /* for experimental use */ 740 741 #define MT_CONTROL 14 /* extra-data protocol message */ 742 #define MT_EXTCONTROL 15 /* control message with externalized contents */ 743 #define MT_OOBDATA 16 /* expedited data */ 744 745 #define MT_NOINIT 255 /* Not a type but a flag to allocate 746 a non-initialized mbuf */ 747 748 /* 749 * String names of mbuf-related UMA(9) and malloc(9) types. Exposed to 750 * !_KERNEL so that monitoring tools can look up the zones with 751 * libmemstat(3). 752 */ 753 #define MBUF_MEM_NAME "mbuf" 754 #define MBUF_CLUSTER_MEM_NAME "mbuf_cluster" 755 #define MBUF_PACKET_MEM_NAME "mbuf_packet" 756 #define MBUF_JUMBOP_MEM_NAME "mbuf_jumbo_page" 757 #define MBUF_JUMBO9_MEM_NAME "mbuf_jumbo_9k" 758 #define MBUF_JUMBO16_MEM_NAME "mbuf_jumbo_16k" 759 #define MBUF_TAG_MEM_NAME "mbuf_tag" 760 #define MBUF_EXTREFCNT_MEM_NAME "mbuf_ext_refcnt" 761 #define MBUF_EXTPGS_MEM_NAME "mbuf_extpgs" 762 763 #ifdef _KERNEL 764 union if_snd_tag_alloc_params; 765 766 #ifdef WITNESS 767 #define MBUF_CHECKSLEEP(how) do { \ 768 if (how == M_WAITOK) \ 769 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ 770 "Sleeping in \"%s\"", __func__); \ 771 } while (0) 772 #else 773 #define MBUF_CHECKSLEEP(how) 774 #endif 775 776 /* 777 * Network buffer allocation API 778 * 779 * The rest of it is defined in kern/kern_mbuf.c 780 */ 781 extern uma_zone_t zone_mbuf; 782 extern uma_zone_t zone_clust; 783 extern uma_zone_t zone_pack; 784 extern uma_zone_t zone_jumbop; 785 extern uma_zone_t zone_jumbo9; 786 extern uma_zone_t zone_jumbo16; 787 extern uma_zone_t zone_extpgs; 788 789 void mb_dupcl(struct mbuf *, struct mbuf *); 790 void mb_free_ext(struct mbuf *); 791 void mb_free_extpg(struct mbuf *); 792 void mb_free_mext_pgs(struct mbuf *); 793 struct mbuf *mb_alloc_ext_pgs(int, m_ext_free_t); 794 struct mbuf *mb_alloc_ext_plus_pages(int, int); 795 struct mbuf *mb_mapped_to_unmapped(struct mbuf *, int, int, int, 796 struct mbuf **); 797 int mb_unmapped_compress(struct mbuf *m); 798 struct mbuf *mb_unmapped_to_ext(struct mbuf *m); 799 void mb_free_notready(struct mbuf *m, int count); 800 void m_adj(struct mbuf *, int); 801 void m_adj_decap(struct mbuf *, int); 802 int m_apply(struct mbuf *, int, int, 803 int (*)(void *, void *, u_int), void *); 804 int m_append(struct mbuf *, int, c_caddr_t); 805 void m_cat(struct mbuf *, struct mbuf *); 806 void m_catpkt(struct mbuf *, struct mbuf *); 807 int m_clget(struct mbuf *m, int how); 808 void *m_cljget(struct mbuf *m, int how, int size); 809 struct mbuf *m_collapse(struct mbuf *, int, int); 810 void m_copyback(struct mbuf *, int, int, c_caddr_t); 811 void m_copydata(const struct mbuf *, int, int, caddr_t); 812 struct mbuf *m_copym(struct mbuf *, int, int, int); 813 struct mbuf *m_copypacket(struct mbuf *, int); 814 void m_copy_pkthdr(struct mbuf *, struct mbuf *); 815 struct mbuf *m_copyup(struct mbuf *, int, int); 816 struct mbuf *m_defrag(struct mbuf *, int); 817 void m_demote_pkthdr(struct mbuf *); 818 void m_demote(struct mbuf *, int, int); 819 struct mbuf *m_devget(char *, int, int, struct ifnet *, 820 void (*)(char *, caddr_t, u_int)); 821 void m_dispose_extcontrolm(struct mbuf *m); 822 struct mbuf *m_dup(const struct mbuf *, int); 823 int m_dup_pkthdr(struct mbuf *, const struct mbuf *, int); 824 void m_extadd(struct mbuf *, char *, u_int, m_ext_free_t, 825 void *, void *, int, int); 826 u_int m_fixhdr(struct mbuf *); 827 struct mbuf *m_fragment(struct mbuf *, int, int); 828 void m_freem(struct mbuf *); 829 struct mbuf *m_get2(int, int, short, int); 830 struct mbuf *m_getjcl(int, short, int, int); 831 struct mbuf *m_getm2(struct mbuf *, int, int, short, int); 832 struct mbuf *m_getptr(struct mbuf *, int, int *); 833 u_int m_length(struct mbuf *, struct mbuf **); 834 int m_mbuftouio(struct uio *, const struct mbuf *, int); 835 int m_unmappedtouio(const struct mbuf *, int, struct uio *, int); 836 void m_move_pkthdr(struct mbuf *, struct mbuf *); 837 int m_pkthdr_init(struct mbuf *, int); 838 struct mbuf *m_prepend(struct mbuf *, int, int); 839 void m_print(const struct mbuf *, int); 840 struct mbuf *m_pulldown(struct mbuf *, int, int, int *); 841 struct mbuf *m_pullup(struct mbuf *, int); 842 int m_sanity(struct mbuf *, int); 843 struct mbuf *m_split(struct mbuf *, int, int); 844 struct mbuf *m_uiotombuf(struct uio *, int, int, int, int); 845 struct mbuf *m_unshare(struct mbuf *, int); 846 int m_snd_tag_alloc(struct ifnet *, 847 union if_snd_tag_alloc_params *, struct m_snd_tag **); 848 void m_snd_tag_init(struct m_snd_tag *, struct ifnet *, u_int); 849 void m_snd_tag_destroy(struct m_snd_tag *); 850 851 static __inline int 852 m_gettype(int size) 853 { 854 int type; 855 856 switch (size) { 857 case MSIZE: 858 type = EXT_MBUF; 859 break; 860 case MCLBYTES: 861 type = EXT_CLUSTER; 862 break; 863 #if MJUMPAGESIZE != MCLBYTES 864 case MJUMPAGESIZE: 865 type = EXT_JUMBOP; 866 break; 867 #endif 868 case MJUM9BYTES: 869 type = EXT_JUMBO9; 870 break; 871 case MJUM16BYTES: 872 type = EXT_JUMBO16; 873 break; 874 default: 875 panic("%s: invalid cluster size %d", __func__, size); 876 } 877 878 return (type); 879 } 880 881 /* 882 * Associated an external reference counted buffer with an mbuf. 883 */ 884 static __inline void 885 m_extaddref(struct mbuf *m, char *buf, u_int size, u_int *ref_cnt, 886 m_ext_free_t freef, void *arg1, void *arg2) 887 { 888 889 KASSERT(ref_cnt != NULL, ("%s: ref_cnt not provided", __func__)); 890 891 atomic_add_int(ref_cnt, 1); 892 m->m_flags |= M_EXT; 893 m->m_ext.ext_buf = buf; 894 m->m_ext.ext_cnt = ref_cnt; 895 m->m_data = m->m_ext.ext_buf; 896 m->m_ext.ext_size = size; 897 m->m_ext.ext_free = freef; 898 m->m_ext.ext_arg1 = arg1; 899 m->m_ext.ext_arg2 = arg2; 900 m->m_ext.ext_type = EXT_EXTREF; 901 m->m_ext.ext_flags = 0; 902 } 903 904 static __inline uma_zone_t 905 m_getzone(int size) 906 { 907 uma_zone_t zone; 908 909 switch (size) { 910 case MCLBYTES: 911 zone = zone_clust; 912 break; 913 #if MJUMPAGESIZE != MCLBYTES 914 case MJUMPAGESIZE: 915 zone = zone_jumbop; 916 break; 917 #endif 918 case MJUM9BYTES: 919 zone = zone_jumbo9; 920 break; 921 case MJUM16BYTES: 922 zone = zone_jumbo16; 923 break; 924 default: 925 panic("%s: invalid cluster size %d", __func__, size); 926 } 927 928 return (zone); 929 } 930 931 /* 932 * Initialize an mbuf with linear storage. 933 * 934 * Inline because the consumer text overhead will be roughly the same to 935 * initialize or call a function with this many parameters and M_PKTHDR 936 * should go away with constant propagation for !MGETHDR. 937 */ 938 static __inline int 939 m_init(struct mbuf *m, int how, short type, int flags) 940 { 941 int error; 942 943 m->m_next = NULL; 944 m->m_nextpkt = NULL; 945 m->m_data = m->m_dat; 946 m->m_len = 0; 947 m->m_flags = flags; 948 m->m_type = type; 949 if (flags & M_PKTHDR) 950 error = m_pkthdr_init(m, how); 951 else 952 error = 0; 953 954 MBUF_PROBE5(m__init, m, how, type, flags, error); 955 return (error); 956 } 957 958 static __inline struct mbuf * 959 m_get(int how, short type) 960 { 961 struct mbuf *m; 962 struct mb_args args; 963 964 args.flags = 0; 965 args.type = type; 966 m = uma_zalloc_arg(zone_mbuf, &args, how); 967 MBUF_PROBE3(m__get, how, type, m); 968 return (m); 969 } 970 971 static __inline struct mbuf * 972 m_gethdr(int how, short type) 973 { 974 struct mbuf *m; 975 struct mb_args args; 976 977 args.flags = M_PKTHDR; 978 args.type = type; 979 m = uma_zalloc_arg(zone_mbuf, &args, how); 980 MBUF_PROBE3(m__gethdr, how, type, m); 981 return (m); 982 } 983 984 static __inline struct mbuf * 985 m_getcl(int how, short type, int flags) 986 { 987 struct mbuf *m; 988 struct mb_args args; 989 990 args.flags = flags; 991 args.type = type; 992 m = uma_zalloc_arg(zone_pack, &args, how); 993 MBUF_PROBE4(m__getcl, how, type, flags, m); 994 return (m); 995 } 996 997 /* 998 * XXX: m_cljset() is a dangerous API. One must attach only a new, 999 * unreferenced cluster to an mbuf(9). It is not possible to assert 1000 * that, so care can be taken only by users of the API. 1001 */ 1002 static __inline void 1003 m_cljset(struct mbuf *m, void *cl, int type) 1004 { 1005 int size; 1006 1007 switch (type) { 1008 case EXT_CLUSTER: 1009 size = MCLBYTES; 1010 break; 1011 #if MJUMPAGESIZE != MCLBYTES 1012 case EXT_JUMBOP: 1013 size = MJUMPAGESIZE; 1014 break; 1015 #endif 1016 case EXT_JUMBO9: 1017 size = MJUM9BYTES; 1018 break; 1019 case EXT_JUMBO16: 1020 size = MJUM16BYTES; 1021 break; 1022 default: 1023 panic("%s: unknown cluster type %d", __func__, type); 1024 break; 1025 } 1026 1027 m->m_data = m->m_ext.ext_buf = cl; 1028 m->m_ext.ext_free = m->m_ext.ext_arg1 = m->m_ext.ext_arg2 = NULL; 1029 m->m_ext.ext_size = size; 1030 m->m_ext.ext_type = type; 1031 m->m_ext.ext_flags = EXT_FLAG_EMBREF; 1032 m->m_ext.ext_count = 1; 1033 m->m_flags |= M_EXT; 1034 MBUF_PROBE3(m__cljset, m, cl, type); 1035 } 1036 1037 static __inline void 1038 m_chtype(struct mbuf *m, short new_type) 1039 { 1040 1041 m->m_type = new_type; 1042 } 1043 1044 static __inline void 1045 m_clrprotoflags(struct mbuf *m) 1046 { 1047 1048 while (m) { 1049 m->m_flags &= ~M_PROTOFLAGS; 1050 m = m->m_next; 1051 } 1052 } 1053 1054 static __inline struct mbuf * 1055 m_last(struct mbuf *m) 1056 { 1057 1058 while (m->m_next) 1059 m = m->m_next; 1060 return (m); 1061 } 1062 1063 static inline u_int 1064 m_extrefcnt(struct mbuf *m) 1065 { 1066 1067 KASSERT(m->m_flags & M_EXT, ("%s: M_EXT missing", __func__)); 1068 1069 return ((m->m_ext.ext_flags & EXT_FLAG_EMBREF) ? m->m_ext.ext_count : 1070 *m->m_ext.ext_cnt); 1071 } 1072 1073 /* 1074 * mbuf, cluster, and external object allocation macros (for compatibility 1075 * purposes). 1076 */ 1077 #define M_MOVE_PKTHDR(to, from) m_move_pkthdr((to), (from)) 1078 #define MGET(m, how, type) ((m) = m_get((how), (type))) 1079 #define MGETHDR(m, how, type) ((m) = m_gethdr((how), (type))) 1080 #define MCLGET(m, how) m_clget((m), (how)) 1081 #define MEXTADD(m, buf, size, free, arg1, arg2, flags, type) \ 1082 m_extadd((m), (char *)(buf), (size), (free), (arg1), (arg2), \ 1083 (flags), (type)) 1084 #define m_getm(m, len, how, type) \ 1085 m_getm2((m), (len), (how), (type), M_PKTHDR) 1086 1087 /* 1088 * Evaluate TRUE if it's safe to write to the mbuf m's data region (this can 1089 * be both the local data payload, or an external buffer area, depending on 1090 * whether M_EXT is set). 1091 */ 1092 #define M_WRITABLE(m) (((m)->m_flags & (M_RDONLY | M_EXTPG)) == 0 && \ 1093 (!(((m)->m_flags & M_EXT)) || \ 1094 (m_extrefcnt(m) == 1))) 1095 1096 /* Check if the supplied mbuf has a packet header, or else panic. */ 1097 #define M_ASSERTPKTHDR(m) \ 1098 KASSERT((m) != NULL && (m)->m_flags & M_PKTHDR, \ 1099 ("%s: no mbuf packet header!", __func__)) 1100 1101 /* Check if mbuf is multipage. */ 1102 #define M_ASSERTEXTPG(m) \ 1103 KASSERT(((m)->m_flags & (M_EXTPG|M_PKTHDR)) == M_EXTPG, \ 1104 ("%s: m %p is not multipage!", __func__, m)) 1105 1106 /* 1107 * Ensure that the supplied mbuf is a valid, non-free mbuf. 1108 * 1109 * XXX: Broken at the moment. Need some UMA magic to make it work again. 1110 */ 1111 #define M_ASSERTVALID(m) \ 1112 KASSERT((((struct mbuf *)m)->m_flags & 0) == 0, \ 1113 ("%s: attempted use of a free mbuf!", __func__)) 1114 1115 /* 1116 * Return the address of the start of the buffer associated with an mbuf, 1117 * handling external storage, packet-header mbufs, and regular data mbufs. 1118 */ 1119 #define M_START(m) \ 1120 (((m)->m_flags & M_EXTPG) ? NULL : \ 1121 ((m)->m_flags & M_EXT) ? (m)->m_ext.ext_buf : \ 1122 ((m)->m_flags & M_PKTHDR) ? &(m)->m_pktdat[0] : \ 1123 &(m)->m_dat[0]) 1124 1125 /* 1126 * Return the size of the buffer associated with an mbuf, handling external 1127 * storage, packet-header mbufs, and regular data mbufs. 1128 */ 1129 #define M_SIZE(m) \ 1130 (((m)->m_flags & M_EXT) ? (m)->m_ext.ext_size : \ 1131 ((m)->m_flags & M_PKTHDR) ? MHLEN : \ 1132 MLEN) 1133 1134 /* 1135 * Set the m_data pointer of a newly allocated mbuf to place an object of the 1136 * specified size at the end of the mbuf, longword aligned. 1137 * 1138 * NB: Historically, we had M_ALIGN(), MH_ALIGN(), and MEXT_ALIGN() as 1139 * separate macros, each asserting that it was called at the proper moment. 1140 * This required callers to themselves test the storage type and call the 1141 * right one. Rather than require callers to be aware of those layout 1142 * decisions, we centralize here. 1143 */ 1144 static __inline void 1145 m_align(struct mbuf *m, int len) 1146 { 1147 #ifdef INVARIANTS 1148 const char *msg = "%s: not a virgin mbuf"; 1149 #endif 1150 int adjust; 1151 1152 KASSERT(m->m_data == M_START(m), (msg, __func__)); 1153 1154 adjust = M_SIZE(m) - len; 1155 m->m_data += adjust &~ (sizeof(long)-1); 1156 } 1157 1158 #define M_ALIGN(m, len) m_align(m, len) 1159 #define MH_ALIGN(m, len) m_align(m, len) 1160 #define MEXT_ALIGN(m, len) m_align(m, len) 1161 1162 /* 1163 * Compute the amount of space available before the current start of data in 1164 * an mbuf. 1165 * 1166 * The M_WRITABLE() is a temporary, conservative safety measure: the burden 1167 * of checking writability of the mbuf data area rests solely with the caller. 1168 * 1169 * NB: In previous versions, M_LEADINGSPACE() would only check M_WRITABLE() 1170 * for mbufs with external storage. We now allow mbuf-embedded data to be 1171 * read-only as well. 1172 */ 1173 #define M_LEADINGSPACE(m) \ 1174 (M_WRITABLE(m) ? ((m)->m_data - M_START(m)) : 0) 1175 1176 /* 1177 * Compute the amount of space available after the end of data in an mbuf. 1178 * 1179 * The M_WRITABLE() is a temporary, conservative safety measure: the burden 1180 * of checking writability of the mbuf data area rests solely with the caller. 1181 * 1182 * NB: In previous versions, M_TRAILINGSPACE() would only check M_WRITABLE() 1183 * for mbufs with external storage. We now allow mbuf-embedded data to be 1184 * read-only as well. 1185 */ 1186 #define M_TRAILINGSPACE(m) \ 1187 (M_WRITABLE(m) ? \ 1188 ((M_START(m) + M_SIZE(m)) - ((m)->m_data + (m)->m_len)) : 0) 1189 1190 /* 1191 * Arrange to prepend space of size plen to mbuf m. If a new mbuf must be 1192 * allocated, how specifies whether to wait. If the allocation fails, the 1193 * original mbuf chain is freed and m is set to NULL. 1194 */ 1195 #define M_PREPEND(m, plen, how) do { \ 1196 struct mbuf **_mmp = &(m); \ 1197 struct mbuf *_mm = *_mmp; \ 1198 int _mplen = (plen); \ 1199 int __mhow = (how); \ 1200 \ 1201 MBUF_CHECKSLEEP(how); \ 1202 if (M_LEADINGSPACE(_mm) >= _mplen) { \ 1203 _mm->m_data -= _mplen; \ 1204 _mm->m_len += _mplen; \ 1205 } else \ 1206 _mm = m_prepend(_mm, _mplen, __mhow); \ 1207 if (_mm != NULL && _mm->m_flags & M_PKTHDR) \ 1208 _mm->m_pkthdr.len += _mplen; \ 1209 *_mmp = _mm; \ 1210 } while (0) 1211 1212 /* 1213 * Change mbuf to new type. This is a relatively expensive operation and 1214 * should be avoided. 1215 */ 1216 #define MCHTYPE(m, t) m_chtype((m), (t)) 1217 1218 /* Return the rcvif of a packet header. */ 1219 static __inline struct ifnet * 1220 m_rcvif(struct mbuf *m) 1221 { 1222 1223 M_ASSERTPKTHDR(m); 1224 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1225 return (NULL); 1226 return (m->m_pkthdr.rcvif); 1227 } 1228 1229 /* Length to m_copy to copy all. */ 1230 #define M_COPYALL 1000000000 1231 1232 extern int max_datalen; /* MHLEN - max_hdr */ 1233 extern int max_hdr; /* Largest link + protocol header */ 1234 extern int max_linkhdr; /* Largest link-level header */ 1235 extern int max_protohdr; /* Largest protocol header */ 1236 extern int nmbclusters; /* Maximum number of clusters */ 1237 extern bool mb_use_ext_pgs; /* Use ext_pgs for sendfile */ 1238 1239 /*- 1240 * Network packets may have annotations attached by affixing a list of 1241 * "packet tags" to the pkthdr structure. Packet tags are dynamically 1242 * allocated semi-opaque data structures that have a fixed header 1243 * (struct m_tag) that specifies the size of the memory block and a 1244 * <cookie,type> pair that identifies it. The cookie is a 32-bit unique 1245 * unsigned value used to identify a module or ABI. By convention this value 1246 * is chosen as the date+time that the module is created, expressed as the 1247 * number of seconds since the epoch (e.g., using date -u +'%s'). The type 1248 * value is an ABI/module-specific value that identifies a particular 1249 * annotation and is private to the module. For compatibility with systems 1250 * like OpenBSD that define packet tags w/o an ABI/module cookie, the value 1251 * PACKET_ABI_COMPAT is used to implement m_tag_get and m_tag_find 1252 * compatibility shim functions and several tag types are defined below. 1253 * Users that do not require compatibility should use a private cookie value 1254 * so that packet tag-related definitions can be maintained privately. 1255 * 1256 * Note that the packet tag returned by m_tag_alloc has the default memory 1257 * alignment implemented by malloc. To reference private data one can use a 1258 * construct like: 1259 * 1260 * struct m_tag *mtag = m_tag_alloc(...); 1261 * struct foo *p = (struct foo *)(mtag+1); 1262 * 1263 * if the alignment of struct m_tag is sufficient for referencing members of 1264 * struct foo. Otherwise it is necessary to embed struct m_tag within the 1265 * private data structure to insure proper alignment; e.g., 1266 * 1267 * struct foo { 1268 * struct m_tag tag; 1269 * ... 1270 * }; 1271 * struct foo *p = (struct foo *) m_tag_alloc(...); 1272 * struct m_tag *mtag = &p->tag; 1273 */ 1274 1275 /* 1276 * Persistent tags stay with an mbuf until the mbuf is reclaimed. Otherwise 1277 * tags are expected to ``vanish'' when they pass through a network 1278 * interface. For most interfaces this happens normally as the tags are 1279 * reclaimed when the mbuf is free'd. However in some special cases 1280 * reclaiming must be done manually. An example is packets that pass through 1281 * the loopback interface. Also, one must be careful to do this when 1282 * ``turning around'' packets (e.g., icmp_reflect). 1283 * 1284 * To mark a tag persistent bit-or this flag in when defining the tag id. 1285 * The tag will then be treated as described above. 1286 */ 1287 #define MTAG_PERSISTENT 0x800 1288 1289 #define PACKET_TAG_NONE 0 /* Nadda */ 1290 1291 /* Packet tags for use with PACKET_ABI_COMPAT. */ 1292 #define PACKET_TAG_IPSEC_IN_DONE 1 /* IPsec applied, in */ 1293 #define PACKET_TAG_IPSEC_OUT_DONE 2 /* IPsec applied, out */ 1294 #define PACKET_TAG_IPSEC_IN_CRYPTO_DONE 3 /* NIC IPsec crypto done */ 1295 #define PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED 4 /* NIC IPsec crypto req'ed */ 1296 #define PACKET_TAG_IPSEC_IN_COULD_DO_CRYPTO 5 /* NIC notifies IPsec */ 1297 #define PACKET_TAG_IPSEC_PENDING_TDB 6 /* Reminder to do IPsec */ 1298 #define PACKET_TAG_BRIDGE 7 /* Bridge processing done */ 1299 #define PACKET_TAG_GIF 8 /* GIF processing done */ 1300 #define PACKET_TAG_GRE 9 /* GRE processing done */ 1301 #define PACKET_TAG_IN_PACKET_CHECKSUM 10 /* NIC checksumming done */ 1302 #define PACKET_TAG_ENCAP 11 /* Encap. processing */ 1303 #define PACKET_TAG_IPSEC_SOCKET 12 /* IPSEC socket ref */ 1304 #define PACKET_TAG_IPSEC_HISTORY 13 /* IPSEC history */ 1305 #define PACKET_TAG_IPV6_INPUT 14 /* IPV6 input processing */ 1306 #define PACKET_TAG_DUMMYNET 15 /* dummynet info */ 1307 #define PACKET_TAG_DIVERT 17 /* divert info */ 1308 #define PACKET_TAG_IPFORWARD 18 /* ipforward info */ 1309 #define PACKET_TAG_MACLABEL (19 | MTAG_PERSISTENT) /* MAC label */ 1310 #define PACKET_TAG_PF (21 | MTAG_PERSISTENT) /* PF/ALTQ information */ 1311 #define PACKET_TAG_RTSOCKFAM 25 /* rtsock sa family */ 1312 #define PACKET_TAG_IPOPTIONS 27 /* Saved IP options */ 1313 #define PACKET_TAG_CARP 28 /* CARP info */ 1314 #define PACKET_TAG_IPSEC_NAT_T_PORTS 29 /* two uint16_t */ 1315 #define PACKET_TAG_ND_OUTGOING 30 /* ND outgoing */ 1316 1317 /* Specific cookies and tags. */ 1318 1319 /* Packet tag routines. */ 1320 struct m_tag *m_tag_alloc(u_int32_t, int, int, int); 1321 void m_tag_delete(struct mbuf *, struct m_tag *); 1322 void m_tag_delete_chain(struct mbuf *, struct m_tag *); 1323 void m_tag_free_default(struct m_tag *); 1324 struct m_tag *m_tag_locate(struct mbuf *, u_int32_t, int, struct m_tag *); 1325 struct m_tag *m_tag_copy(struct m_tag *, int); 1326 int m_tag_copy_chain(struct mbuf *, const struct mbuf *, int); 1327 void m_tag_delete_nonpersistent(struct mbuf *); 1328 1329 /* 1330 * Initialize the list of tags associated with an mbuf. 1331 */ 1332 static __inline void 1333 m_tag_init(struct mbuf *m) 1334 { 1335 1336 SLIST_INIT(&m->m_pkthdr.tags); 1337 } 1338 1339 /* 1340 * Set up the contents of a tag. Note that this does not fill in the free 1341 * method; the caller is expected to do that. 1342 * 1343 * XXX probably should be called m_tag_init, but that was already taken. 1344 */ 1345 static __inline void 1346 m_tag_setup(struct m_tag *t, u_int32_t cookie, int type, int len) 1347 { 1348 1349 t->m_tag_id = type; 1350 t->m_tag_len = len; 1351 t->m_tag_cookie = cookie; 1352 } 1353 1354 /* 1355 * Reclaim resources associated with a tag. 1356 */ 1357 static __inline void 1358 m_tag_free(struct m_tag *t) 1359 { 1360 1361 (*t->m_tag_free)(t); 1362 } 1363 1364 /* 1365 * Return the first tag associated with an mbuf. 1366 */ 1367 static __inline struct m_tag * 1368 m_tag_first(struct mbuf *m) 1369 { 1370 1371 return (SLIST_FIRST(&m->m_pkthdr.tags)); 1372 } 1373 1374 /* 1375 * Return the next tag in the list of tags associated with an mbuf. 1376 */ 1377 static __inline struct m_tag * 1378 m_tag_next(struct mbuf *m __unused, struct m_tag *t) 1379 { 1380 1381 return (SLIST_NEXT(t, m_tag_link)); 1382 } 1383 1384 /* 1385 * Prepend a tag to the list of tags associated with an mbuf. 1386 */ 1387 static __inline void 1388 m_tag_prepend(struct mbuf *m, struct m_tag *t) 1389 { 1390 1391 SLIST_INSERT_HEAD(&m->m_pkthdr.tags, t, m_tag_link); 1392 } 1393 1394 /* 1395 * Unlink a tag from the list of tags associated with an mbuf. 1396 */ 1397 static __inline void 1398 m_tag_unlink(struct mbuf *m, struct m_tag *t) 1399 { 1400 1401 SLIST_REMOVE(&m->m_pkthdr.tags, t, m_tag, m_tag_link); 1402 } 1403 1404 /* These are for OpenBSD compatibility. */ 1405 #define MTAG_ABI_COMPAT 0 /* compatibility ABI */ 1406 1407 static __inline struct m_tag * 1408 m_tag_get(int type, int length, int wait) 1409 { 1410 return (m_tag_alloc(MTAG_ABI_COMPAT, type, length, wait)); 1411 } 1412 1413 static __inline struct m_tag * 1414 m_tag_find(struct mbuf *m, int type, struct m_tag *start) 1415 { 1416 return (SLIST_EMPTY(&m->m_pkthdr.tags) ? (struct m_tag *)NULL : 1417 m_tag_locate(m, MTAG_ABI_COMPAT, type, start)); 1418 } 1419 1420 static inline struct m_snd_tag * 1421 m_snd_tag_ref(struct m_snd_tag *mst) 1422 { 1423 1424 refcount_acquire(&mst->refcount); 1425 return (mst); 1426 } 1427 1428 static inline void 1429 m_snd_tag_rele(struct m_snd_tag *mst) 1430 { 1431 1432 if (refcount_release(&mst->refcount)) 1433 m_snd_tag_destroy(mst); 1434 } 1435 1436 static __inline struct mbuf * 1437 m_free(struct mbuf *m) 1438 { 1439 struct mbuf *n = m->m_next; 1440 1441 MBUF_PROBE1(m__free, m); 1442 if ((m->m_flags & (M_PKTHDR|M_NOFREE)) == (M_PKTHDR|M_NOFREE)) 1443 m_tag_delete_chain(m, NULL); 1444 if (m->m_flags & M_PKTHDR && m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1445 m_snd_tag_rele(m->m_pkthdr.snd_tag); 1446 if (m->m_flags & M_EXTPG) 1447 mb_free_extpg(m); 1448 else if (m->m_flags & M_EXT) 1449 mb_free_ext(m); 1450 else if ((m->m_flags & M_NOFREE) == 0) 1451 uma_zfree(zone_mbuf, m); 1452 return (n); 1453 } 1454 1455 static __inline int 1456 rt_m_getfib(struct mbuf *m) 1457 { 1458 KASSERT(m->m_flags & M_PKTHDR , ("Attempt to get FIB from non header mbuf.")); 1459 return (m->m_pkthdr.fibnum); 1460 } 1461 1462 #define M_GETFIB(_m) rt_m_getfib(_m) 1463 1464 #define M_SETFIB(_m, _fib) do { \ 1465 KASSERT((_m)->m_flags & M_PKTHDR, ("Attempt to set FIB on non header mbuf.")); \ 1466 ((_m)->m_pkthdr.fibnum) = (_fib); \ 1467 } while (0) 1468 1469 /* flags passed as first argument for "m_xxx_tcpip_hash()" */ 1470 #define MBUF_HASHFLAG_L2 (1 << 2) 1471 #define MBUF_HASHFLAG_L3 (1 << 3) 1472 #define MBUF_HASHFLAG_L4 (1 << 4) 1473 1474 /* mbuf hashing helper routines */ 1475 uint32_t m_ether_tcpip_hash_init(void); 1476 uint32_t m_ether_tcpip_hash(const uint32_t, const struct mbuf *, uint32_t); 1477 uint32_t m_infiniband_tcpip_hash_init(void); 1478 uint32_t m_infiniband_tcpip_hash(const uint32_t, const struct mbuf *, uint32_t); 1479 1480 #ifdef MBUF_PROFILING 1481 void m_profile(struct mbuf *m); 1482 #define M_PROFILE(m) m_profile(m) 1483 #else 1484 #define M_PROFILE(m) 1485 #endif 1486 1487 struct mbufq { 1488 STAILQ_HEAD(, mbuf) mq_head; 1489 int mq_len; 1490 int mq_maxlen; 1491 }; 1492 1493 static inline void 1494 mbufq_init(struct mbufq *mq, int maxlen) 1495 { 1496 1497 STAILQ_INIT(&mq->mq_head); 1498 mq->mq_maxlen = maxlen; 1499 mq->mq_len = 0; 1500 } 1501 1502 static inline struct mbuf * 1503 mbufq_flush(struct mbufq *mq) 1504 { 1505 struct mbuf *m; 1506 1507 m = STAILQ_FIRST(&mq->mq_head); 1508 STAILQ_INIT(&mq->mq_head); 1509 mq->mq_len = 0; 1510 return (m); 1511 } 1512 1513 static inline void 1514 mbufq_drain(struct mbufq *mq) 1515 { 1516 struct mbuf *m, *n; 1517 1518 n = mbufq_flush(mq); 1519 while ((m = n) != NULL) { 1520 n = STAILQ_NEXT(m, m_stailqpkt); 1521 m_freem(m); 1522 } 1523 } 1524 1525 static inline struct mbuf * 1526 mbufq_first(const struct mbufq *mq) 1527 { 1528 1529 return (STAILQ_FIRST(&mq->mq_head)); 1530 } 1531 1532 static inline struct mbuf * 1533 mbufq_last(const struct mbufq *mq) 1534 { 1535 1536 return (STAILQ_LAST(&mq->mq_head, mbuf, m_stailqpkt)); 1537 } 1538 1539 static inline int 1540 mbufq_full(const struct mbufq *mq) 1541 { 1542 1543 return (mq->mq_maxlen > 0 && mq->mq_len >= mq->mq_maxlen); 1544 } 1545 1546 static inline int 1547 mbufq_len(const struct mbufq *mq) 1548 { 1549 1550 return (mq->mq_len); 1551 } 1552 1553 static inline int 1554 mbufq_enqueue(struct mbufq *mq, struct mbuf *m) 1555 { 1556 1557 if (mbufq_full(mq)) 1558 return (ENOBUFS); 1559 STAILQ_INSERT_TAIL(&mq->mq_head, m, m_stailqpkt); 1560 mq->mq_len++; 1561 return (0); 1562 } 1563 1564 static inline struct mbuf * 1565 mbufq_dequeue(struct mbufq *mq) 1566 { 1567 struct mbuf *m; 1568 1569 m = STAILQ_FIRST(&mq->mq_head); 1570 if (m) { 1571 STAILQ_REMOVE_HEAD(&mq->mq_head, m_stailqpkt); 1572 m->m_nextpkt = NULL; 1573 mq->mq_len--; 1574 } 1575 return (m); 1576 } 1577 1578 static inline void 1579 mbufq_prepend(struct mbufq *mq, struct mbuf *m) 1580 { 1581 1582 STAILQ_INSERT_HEAD(&mq->mq_head, m, m_stailqpkt); 1583 mq->mq_len++; 1584 } 1585 1586 /* 1587 * Note: this doesn't enforce the maximum list size for dst. 1588 */ 1589 static inline void 1590 mbufq_concat(struct mbufq *mq_dst, struct mbufq *mq_src) 1591 { 1592 1593 mq_dst->mq_len += mq_src->mq_len; 1594 STAILQ_CONCAT(&mq_dst->mq_head, &mq_src->mq_head); 1595 mq_src->mq_len = 0; 1596 } 1597 1598 #ifdef _SYS_TIMESPEC_H_ 1599 static inline void 1600 mbuf_tstmp2timespec(struct mbuf *m, struct timespec *ts) 1601 { 1602 1603 KASSERT((m->m_flags & M_PKTHDR) != 0, ("mbuf %p no M_PKTHDR", m)); 1604 KASSERT((m->m_flags & (M_TSTMP|M_TSTMP_LRO)) != 0, ("mbuf %p no M_TSTMP or M_TSTMP_LRO", m)); 1605 ts->tv_sec = m->m_pkthdr.rcv_tstmp / 1000000000; 1606 ts->tv_nsec = m->m_pkthdr.rcv_tstmp % 1000000000; 1607 } 1608 #endif 1609 1610 #ifdef DEBUGNET 1611 /* Invoked from the debugnet client code. */ 1612 void debugnet_mbuf_drain(void); 1613 void debugnet_mbuf_start(void); 1614 void debugnet_mbuf_finish(void); 1615 void debugnet_mbuf_reinit(int nmbuf, int nclust, int clsize); 1616 #endif 1617 1618 static inline bool 1619 mbuf_has_tls_session(struct mbuf *m) 1620 { 1621 1622 if (m->m_flags & M_EXTPG) { 1623 if (m->m_epg_tls != NULL) { 1624 return (true); 1625 } 1626 } 1627 return (false); 1628 } 1629 1630 #endif /* _KERNEL */ 1631 #endif /* !_SYS_MBUF_H_ */ 1632