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