reactos/drivers/lib/oskittcp/include/freebsd/src/sys/sys/mbuf.h

   1 /*
   2  * Copyright (c) 1997-1998 University of Utah and the Flux Group.
   3  * All rights reserved.
   4  *
   5  * This file is part of the Flux OSKit.  The OSKit is free software, also known
   6  * as "open source;" you can redistribute it and/or modify it under the terms
   7  * of the GNU General Public License (GPL), version 2, as published by the Free
   8  * Software Foundation (FSF).  To explore alternate licensing terms, contact
   9  * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
  10  *
  11  * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
  12  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13  * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
  14  * received a copy of the GPL along with the OSKit; see the file COPYING.  If
  15  * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
  16  */
  17 /*
  18  * Copyright (c) 1982, 1986, 1988, 1993
  19  *      The Regents of the University of California.  All rights reserved.
  20  *
  21  * Redistribution and use in source and binary forms, with or without
  22  * modification, are permitted provided that the following conditions
  23  * are met:
  24  * 1. Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  * 2. Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in the
  28  *    documentation and/or other materials provided with the distribution.
  29  * 3. All advertising materials mentioning features or use of this software
  30  *    must display the following acknowledgement:
  31  *      This product includes software developed by the University of
  32  *      California, Berkeley and its contributors.
  33  * 4. Neither the name of the University nor the names of its contributors
  34  *    may be used to endorse or promote products derived from this software
  35  *    without specific prior written permission.
  36  *
  37  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  38  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  39  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  40  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  41  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  42  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  43  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  45  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  46  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  47  * SUCH DAMAGE.
  48  *
  49  *      @(#)mbuf.h      8.3 (Berkeley) 1/21/94
  50  * $\Id: mbuf.h,v 1.9 1994/11/14 13:54:20 bde Exp $
  51  */
  52
  53 #ifndef _SYS_MBUF_H_
  54 #define _SYS_MBUF_H_
  55
  56 #ifndef M_WAITOK
  57 #include <sys/malloc.h>
  58 #endif
  59
  60 #ifndef OSKIT
  61 #ifdef __REACTOS__
  62 /* #define OSKIT */
  63 #define LOCAL_OSKIT_DEFINED
  64 #endif
  65 #endif
  66
  67 /*
  68  * Mbufs are of a single size, MSIZE (machine/machparam.h), which
  69  * includes overhead.  An mbuf may add a single "mbuf cluster" of size
  70  * MCLBYTES (also in machine/machparam.h), which has no additional overhead
  71  * and is used instead of the internal data area; this is done when
  72  * at least MINCLSIZE of data must be stored.
  73  */
  74
  75 #define MLEN            (MSIZE - sizeof(struct m_hdr))  /* normal data len */
  76 #define MHLEN           (MLEN - sizeof(struct pkthdr))  /* data len w/pkthdr */
  77
  78 #define MINCLSIZE       (MHLEN + MLEN)  /* smallest amount to put in cluster */
  79 #define M_MAXCOMPRESS   (MHLEN / 2)     /* max amount to copy for compression */
  80
  81 /*
  82  * Macros for type conversion
  83  * mtod(m,t) -  convert mbuf pointer to data pointer of correct type
  84  * dtom(x) -    convert data pointer within mbuf to mbuf pointer (XXX)
  85  * mtocl(x) -   convert pointer within cluster to cluster index #
  86  * cltom(x) -   convert cluster # to ptr to beginning of cluster
  87  */
  88 #define mtod(m,t)       ((t)((m)->m_data))
  89 #ifndef __REACTOS__
  90 #define dtom(x)         ((struct mbuf *)((int)(x) & ~(MSIZE-1)))
  91 #else
  92 #define dtom(x)         ((struct mbuf *)((int)(x) - sizeof(struct m_hdr)))
  93 #endif
  94 #ifndef OSKIT
  95 #define mtocl(x)        (((u_int)(x) - (u_int)mbutl) >> MCLSHIFT)
  96 #define cltom(x)        ((caddr_t)((u_int)mbutl + ((u_int)(x) << MCLSHIFT)))
  97 #endif /* OSKIT */
  98
  99 /* header at beginning of each mbuf: */
 100 struct m_hdr {
 101         struct  mbuf *mh_next;          /* next buffer in chain */
 102         struct  mbuf *mh_nextpkt;       /* next chain in queue/record */
 103         int     mh_len;                 /* amount of data in this mbuf */
 104         caddr_t mh_data;                /* location of data */
 105         short   mh_type;                /* type of data in this mbuf */
 106         short   mh_flags;               /* flags; see below */
 107 };
 108
 109 /* record/packet header in first mbuf of chain; valid if M_PKTHDR set */
 110 struct  pkthdr {
 111         int     len;            /* total packet length */
 112         struct  ifnet *rcvif;   /* rcv interface */
 113 };
 114
 115 /* description of external storage mapped into mbuf, valid if M_EXT set */
 116 struct m_ext {
 117         caddr_t ext_buf;                /* start of buffer */
 118 #ifdef OSKIT
 119         struct oskit_bufio      *ext_bufio;     /* OS Kit bufio pointer */
 120 #else
 121         void    (*ext_free)             /* free routine if not the usual */
 122                 __P((caddr_t, u_int));
 123 #endif
 124         u_int   ext_size;               /* size of buffer, for ext_free */
 125 };
 126
 127 struct mbuf {
 128         struct  m_hdr m_hdr;
 129         union {
 130                 struct {
 131                         struct  pkthdr MH_pkthdr;       /* M_PKTHDR set */
 132                         union {
 133                                 struct  m_ext MH_ext;   /* M_EXT set */
 134                                 char    MH_databuf[MHLEN];
 135                         } MH_dat;
 136                 } MH;
 137                 char    M_databuf[MLEN];                /* !M_PKTHDR, !M_EXT */
 138         } M_dat;
 139 };
 140 #define m_next          m_hdr.mh_next
 141 #define m_len           m_hdr.mh_len
 142 #define m_data          m_hdr.mh_data
 143 #define m_type          m_hdr.mh_type
 144 #define m_flags         m_hdr.mh_flags
 145 #define m_nextpkt       m_hdr.mh_nextpkt
 146 #define m_act           m_nextpkt
 147 #define m_pkthdr        M_dat.MH.MH_pkthdr
 148 #define m_ext           M_dat.MH.MH_dat.MH_ext
 149 #define m_pktdat        M_dat.MH.MH_dat.MH_databuf
 150 #define m_dat           M_dat.M_databuf
 151
 152 /* mbuf flags */
 153 #if defined(OSKIT) && !defined(__REACTOS__)
 154 #include <oskit/io/bufio.h>
 155 /*
 156  * A small step for mankind, but a huge leap for BSD:
 157  * We consistently use oskit_bufios for external mbufs
 158  */
 159 #endif
 160 #define M_EXT           0x0001  /* has associated external storage */
 161 #define M_PKTHDR        0x0002  /* start of record */
 162 #define M_EOR           0x0004  /* end of record */
 163
 164 /* mbuf pkthdr flags, also in m_flags */
 165 #define M_BCAST         0x0100  /* send/received as link-level broadcast */
 166 #define M_MCAST         0x0200  /* send/received as link-level multicast */
 167
 168 /* flags copied when copying m_pkthdr */
 169 #define M_COPYFLAGS     (M_PKTHDR|M_EOR|M_BCAST|M_MCAST)
 170
 171 /* mbuf types */
 172 #define MT_FREE         0       /* should be on free list */
 173 #define MT_DATA         1       /* dynamic (data) allocation */
 174 #define MT_HEADER       2       /* packet header */
 175 #define MT_SOCKET       3       /* socket structure */
 176 #define MT_PCB          4       /* protocol control block */
 177 #define MT_RTABLE       5       /* routing tables */
 178 #define MT_HTABLE       6       /* IMP host tables */
 179 #define MT_ATABLE       7       /* address resolution tables */
 180 #define MT_SONAME       8       /* socket name */
 181 #define MT_SOOPTS       10      /* socket options */
 182 #define MT_FTABLE       11      /* fragment reassembly header */
 183 #define MT_RIGHTS       12      /* access rights */
 184 #define MT_IFADDR       13      /* interface address */
 185 #define MT_CONTROL      14      /* extra-data protocol message */
 186 #define MT_OOBDATA      15      /* expedited data  */
 187
 188 /* flags to m_get/MGET */
 189 #define M_DONTWAIT      M_NOWAIT
 190 #define M_WAIT          M_WAITOK
 191
 192 /*
 193  * mbuf utility macros:
 194  *
 195  *      MBUFLOCK(code)
 196  * prevents a section of code from from being interrupted by network
 197  * drivers.
 198  */
 199 #define MBUFLOCK(code) \
 200         { int ms = splimp(); \
 201           { code } \
 202           splx(ms); \
 203         }
 204
 205 /*
 206  * mbuf allocation/deallocation macros:
 207  *
 208  *      MGET(struct mbuf *m, int how, int type)
 209  * allocates an mbuf and initializes it to contain internal data.
 210  *
 211  *      MGETHDR(struct mbuf *m, int how, int type)
 212  * allocates an mbuf and initializes it to contain a packet header
 213  * and internal data.
 214  */
 215 #define MGET(m, how, type) { \
 216         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 217         OS_DbgPrint(OSK_MID_TRACE,("(MGET) got mbuf @ %x\n", m)); \
 218         if (m) { \
 219                 (m)->m_type = (type); \
 220                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 221                 (m)->m_next = (struct mbuf *)NULL; \
 222                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 223                 (m)->m_data = (m)->m_dat; \
 224                 (m)->m_flags = 0; \
 225         } else \
 226                 (m) = m_retry((how), (type)); \
 227 }
 228
 229 #define MGETHDR(m, how, type) { \
 230         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 231         OS_DbgPrint(OSK_MID_TRACE,("(MGETHDR) got mbuf @ %x\n", m)); \
 232         if (m) { \
 233                 (m)->m_type = (type); \
 234                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 235                 (m)->m_next = (struct mbuf *)NULL; \
 236                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 237                 (m)->m_data = (m)->m_pktdat; \
 238                 (m)->m_flags = M_PKTHDR; \
 239         } else \
 240                 (m) = m_retryhdr((how), (type)); \
 241 }
 242
 243 #ifdef OSKIT
 244 #define MGET_DONT_RECURSE(m, how, type) { \
 245         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 246         OS_DbgPrint(OSK_MID_TRACE,("(MGET_DONT_RECURSE) got mbuf @ %x\n", m)); \
 247         if (m) { \
 248                 (m)->m_type = (type); \
 249                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 250                 (m)->m_next = (struct mbuf *)NULL; \
 251                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 252                 (m)->m_data = (m)->m_dat; \
 253                 (m)->m_flags = 0; \
 254         } else \
 255                 (m) = (struct mbuf *)0; \
 256 }
 257
 258 #define MGETHDR_DONT_RECURSE(m, how, type) { \
 259         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 260         OS_DbgPrint(OSK_MID_TRACE,("(MGETHDR_DONT_RECURSE) got mbuf @ %x\n", m)); \
 261         if (m) { \
 262                 (m)->m_type = (type); \
 263                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 264                 (m)->m_next = (struct mbuf *)NULL; \
 265                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 266                 (m)->m_data = (m)->m_pktdat; \
 267                 (m)->m_flags = M_PKTHDR; \
 268         } else \
 269                 (m) = (struct mbuf *)0; \
 270 }
 271 #endif /* OSKIT */
 272
 273 #ifndef OSKIT
 274 /*
 275  * Mbuf cluster macros.
 276  * MCLALLOC(caddr_t p, int how) allocates an mbuf cluster.
 277  * MCLGET adds such clusters to a normal mbuf;
 278  * the flag M_EXT is set upon success.
 279  * MCLFREE releases a reference to a cluster allocated by MCLALLOC,
 280  * freeing the cluster if the reference count has reached 0.
 281  *
 282  * Normal mbuf clusters are normally treated as character arrays
 283  * after allocation, but use the first word of the buffer as a free list
 284  * pointer while on the free list.
 285  */
 286 union mcluster {
 287         union   mcluster *mcl_next;
 288         char    mcl_buf[MCLBYTES];
 289 };
 290
 291 #define MCLALLOC(p, how) \
 292         MBUFLOCK( \
 293           OS_DbgPrint(OSK_MID_TRACE,("(MCLALLOC)\n")); \
 294           if (mclfree == 0) \
 295                 (void)m_clalloc(1, (how)); \
 296           (p) = (caddr_t)mclfree; \
 297           if ((p)) { \
 298                 ++mclrefcnt[mtocl(p)]; \
 299                 mbstat.m_clfree--; \
 300                 mclfree = ((union mcluster *)(p))->mcl_next; \
 301           } \
 302         )
 303
 304 #ifdef __REACTOS__
 305 #define MCLGET(m, how) { \
 306           OS_DbgPrint(OSK_MID_TRACE,("(MCLGET) m = %x\n", m)); \
 307           (m)->m_data = (m)->m_ext.ext_buf = malloc(MCLBYTES); \
 308           (m)->m_flags |= M_EXT; \
 309           (m)->m_ext.ext_size = MCLBYTES; \
 310         }
 311
 312 #define MCLFREE(p) { \
 313           free( (p) ); \
 314         }
 315 #else
 316 #define MCLGET(m, how) \
 317         { MCLALLOC((m)->m_ext.ext_buf, (how)); \
 318           OS_DbgPrint(OSK_MID_TRACE,("(MCLGET) m = %x\n", m)); \
 319           if ((m)->m_ext.ext_buf != NULL) { \
 320                 (m)->m_data = (m)->m_ext.ext_buf; \
 321                 (m)->m_flags |= M_EXT; \
 322                 (m)->m_ext.ext_size = MCLBYTES;  \
 323           } \
 324         }
 325
 326 #define MCLFREE(p) \
 327         MBUFLOCK ( \
 328           OS_DbgPrint(OSK_MID_TRACE,("(MCLFREE)\n")); \
 329           if (--mclrefcnt[mtocl(p)] == 0) { \
 330                 ((union mcluster *)(p))->mcl_next = mclfree; \
 331                 mclfree = (union mcluster *)(p); \
 332                 mbstat.m_clfree++; \
 333           } \
 334         )
 335 #endif
 336 #else
 337 #define MCLGET(m, how) \
 338         { (m)->m_ext.ext_bufio = oskit_bufio_create(MCLBYTES); \
 339           OS_DbgPrint(OSK_MID_TRACE,("(!OSKIT MCLGET)\n")); \
 340           oskit_bufio_map((m)->m_ext.ext_bufio, \
 341                 (void **)&((m)->m_ext.ext_buf), 0, MCLBYTES);   \
 342           if ((m)->m_ext.ext_buf != NULL) { \
 343                 (m)->m_data = (m)->m_ext.ext_buf; \
 344                 (m)->m_flags |= M_EXT; \
 345                 (m)->m_ext.ext_size = MCLBYTES;  \
 346           } \
 347         }
 348 #endif /* !OSKIT */
 349
 350 /*
 351  * MFREE(struct mbuf *m, struct mbuf *n)
 352  * Free a single mbuf and associated external storage.
 353  * Place the successor, if any, in n.
 354  */
 355 #ifdef notyet
 356 #define MFREE(m, n) \
 357         { MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--;) \
 358           if ((m)->m_flags & M_EXT) { \
 359                 if ((m)->m_ext.ext_free) \
 360                         (*((m)->m_ext.ext_free))((m)->m_ext.ext_buf, \
 361                             (m)->m_ext.ext_size); \
 362                 else \
 363                         MCLFREE((m)->m_ext.ext_buf); \
 364           } \
 365           (n) = (m)->m_next; \
 366           FREE((m), mbtypes[(m)->m_type]); \
 367           m = NULL; \
 368         }
 369 #else /* notyet */
 370 #ifdef OSKIT
 371 #define MFREE(m, nn) \
 372         { MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--;) \
 373           OS_DbgPrint(OSK_MID_TRACE,("(OSKIT MFREE) m = %x\n", m)); \
 374           if ((m)->m_flags & M_EXT) { \
 375                 oskit_bufio_release((m)->m_ext.ext_bufio);      \
 376           } \
 377           (nn) = (m)->m_next; \
 378           FREE((m), mbtypes[(m)->m_type]); \
 379           m = NULL; \
 380         }
 381 #else /* !OSKIT */
 382 #define MFREE(m, nn) \
 383         { MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--;) \
 384           OS_DbgPrint(OSK_MID_TRACE,("(!OSKIT MFREE) m = %x\n", m)); \
 385           if ((m)->m_flags & M_EXT) { \
 386                 MCLFREE((m)->m_ext.ext_buf); \
 387           } \
 388           (nn) = (m)->m_next; \
 389           FREE((m), mbtypes[(m)->m_type]); \
 390           m = NULL; \
 391         }
 392 #endif /* OSKIT */
 393 #endif
 394
 395 /*
 396  * Copy mbuf pkthdr from from to to.
 397  * from must have M_PKTHDR set, and to must be empty.
 398  */
 399 #define M_COPY_PKTHDR(to, from) { \
 400         OS_DbgPrint(OSK_MID_TRACE,("(M_COPY_PKTHDR) to %x from %x\n", to, from)); \
 401         (to)->m_pkthdr = (from)->m_pkthdr; \
 402         (to)->m_flags = (from)->m_flags & M_COPYFLAGS; \
 403         (to)->m_data = (to)->m_pktdat; \
 404 }
 405
 406 /*
 407  * Set the m_data pointer of a newly-allocated mbuf (m_get/MGET) to place
 408  * an object of the specified size at the end of the mbuf, longword aligned.
 409  */
 410 #define M_ALIGN(m, len) \
 411         { \
 412           OS_DbgPrint(OSK_MID_TRACE,("(M_ALIGN) %d @ %x\n", m, len)); \
 413           (m)->m_data += (MLEN - (len)) &~ (sizeof(long) - 1); \
 414         }
 415 /*
 416  * As above, for mbufs allocated with m_gethdr/MGETHDR
 417  * or initialized by M_COPY_PKTHDR.
 418  */
 419 #define MH_ALIGN(m, len) \
 420         { \
 421           OS_DbgPrint(OSK_MID_TRACE,("(MH_ALIGN) %d @ %x\n", m, len)); \
 422           (m)->m_data += (MHLEN - (len)) &~ (sizeof(long) - 1); \
 423         }
 424
 425 /*
 426  * Compute the amount of space available
 427  * before the current start of data in an mbuf.
 428  */
 429 #ifdef OSKIT
 430 /* Be bold and strong: why shouldn't that work??? */
 431 #define M_LEADINGSPACE(m) \
 432         ((m)->m_flags & M_EXT ? (m)->m_data - (m)->m_ext.ext_buf : \
 433             (m)->m_flags & M_PKTHDR ? (m)->m_data - (m)->m_pktdat : \
 434             (m)->m_data - (m)->m_dat)
 435 #else
 436 #define M_LEADINGSPACE(m) \
 437         ((m)->m_flags & M_EXT ? /* (m)->m_data - (m)->m_ext.ext_buf */ 0 : \
 438             (m)->m_flags & M_PKTHDR ? (m)->m_data - (m)->m_pktdat : \
 439             (m)->m_data - (m)->m_dat)
 440 #endif /* OSKIT */
 441
 442 /*
 443  * Compute the amount of space available
 444  * after the end of data in an mbuf.
 445  */
 446 #define M_TRAILINGSPACE(m) \
 447         OS_DbgPrint(OSK_MID_TRACE,("(M_TRAILINGSPACE) %x\n", m)); \
 448         ((m)->m_flags & M_EXT ? (m)->m_ext.ext_buf + (m)->m_ext.ext_size - \
 449             ((m)->m_data + (m)->m_len) : \
 450             &(m)->m_dat[MLEN] - ((m)->m_data + (m)->m_len))
 451
 452 /*
 453  * Arrange to prepend space of size plen to mbuf m.
 454  * If a new mbuf must be allocated, how specifies whether to wait.
 455  * If how is M_DONTWAIT and allocation fails, the original mbuf chain
 456  * is freed and m is set to NULL.
 457  */
 458 #define M_PREPEND(m, plen, how) { \
 459         OS_DbgPrint(OSK_MID_TRACE,("(M_PREPEND) %d on %x\n", plen, m)); \
 460         if (M_LEADINGSPACE(m) >= (plen)) { \
 461                 (m)->m_data -= (plen); \
 462                 (m)->m_len += (plen); \
 463         } else \
 464                 (m) = m_prepend((m), (plen), (how)); \
 465         if ((m) && (m)->m_flags & M_PKTHDR) \
 466                 (m)->m_pkthdr.len += (plen); \
 467 }
 468
 469 /* change mbuf to new type */
 470 #define MCHTYPE(m, t) { \
 471         OS_DbgPrint(OSK_MID_TRACE,("(MCHTYPE) %x %x\n", m, t)); \
 472         MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--; mbstat.m_mtypes[t]++;) \
 473         (m)->m_type = t;\
 474 }
 475
 476 /* length to m_copy to copy all */
 477 #define M_COPYALL       1000000000
 478
 479 /* compatiblity with 4.3 */
 480 #define  m_copy(m, o, l)        m_copym((m), (o), (l), M_DONTWAIT)
 481
 482 /*
 483  * Mbuf statistics.
 484  */
 485 struct mbstat {
 486         u_long  m_mbufs;        /* mbufs obtained from page pool */
 487         u_long  m_clusters;     /* clusters obtained from page pool */
 488         u_long  m_spare;        /* spare field */
 489         u_long  m_clfree;       /* free clusters */
 490         u_long  m_drops;        /* times failed to find space */
 491         u_long  m_wait;         /* times waited for space */
 492         u_long  m_drain;        /* times drained protocols for space */
 493         u_short m_mtypes[256];  /* type specific mbuf allocations */
 494 };
 495
 496 #ifdef  KERNEL
 497 #ifndef OSKIT
 498 extern  struct mbuf *mbutl;             /* virtual address of mclusters */
 499 extern  char *mclrefcnt;                /* cluster reference counts */
 500 #endif /* !OSKIT */
 501 struct  mbstat mbstat;
 502 #ifndef OSKIT
 503 extern  int nmbclusters;
 504 union   mcluster *mclfree;
 505 #endif /* !OSKIT */
 506 int     max_linkhdr;                    /* largest link-level header */
 507 int     max_protohdr;                   /* largest protocol header */
 508 int     max_hdr;                        /* largest link+protocol header */
 509 int     max_datalen;                    /* MHLEN - max_hdr */
 510 extern  int mbtypes[];                  /* XXX */
 511
 512 int     m_clalloc __P((int, int));
 513 void    m_copyback __P((struct mbuf *, int, int, caddr_t));
 514 struct  mbuf *m_retry __P((int, int));
 515 struct  mbuf *m_retryhdr __P((int, int));
 516 void    m_reclaim __P((void));
 517 struct  mbuf *m_get __P((int, int));
 518 struct  mbuf *m_gethdr __P((int, int));
 519 struct  mbuf *m_getclr __P((int, int));
 520 struct  mbuf *m_free __P((struct mbuf *));
 521 void    m_freem __P((struct mbuf *));
 522 struct  mbuf *m_prepend __P((struct mbuf *,int,int));
 523 struct  mbuf *m_copym __P((struct mbuf *, int, int, int));
 524 void    m_copydata __P((struct mbuf *,int,int,caddr_t));
 525 void    m_cat __P((struct mbuf *,struct mbuf *));
 526 void    m_adj __P((struct mbuf *,int));
 527 struct  mbuf *m_pullup __P((struct mbuf *, int));
 528 struct  mbuf *m_split __P((struct mbuf *,int,int));
 529 struct  mbuf *m_devget __P((char *, int, int, struct ifnet *,
 530                             void (*copy)(struct mbuf *, caddr_t, u_int)));
 531
 532 #ifdef MBTYPES
 533 int mbtypes[] = {                               /* XXX */
 534         M_FREE,         /* MT_FREE      0          should be on free list */
 535         M_MBUF,         /* MT_DATA      1          dynamic (data) allocation */
 536         M_MBUF,         /* MT_HEADER    2          packet header */
 537         M_SOCKET,       /* MT_SOCKET    3          socket structure */
 538         M_PCB,          /* MT_PCB       4          protocol control block */
 539         M_RTABLE,       /* MT_RTABLE    5          routing tables */
 540         M_HTABLE,       /* MT_HTABLE    6          IMP host tables */
 541         0,              /* MT_ATABLE    7          address resolution tables */
 542         M_MBUF,         /* MT_SONAME    8          socket name */
 543         0,              /*              9 */
 544         M_SOOPTS,       /* MT_SOOPTS    10         socket options */
 545         M_FTABLE,       /* MT_FTABLE    11         fragment reassembly header */
 546         M_MBUF,         /* MT_RIGHTS    12         access rights */
 547         M_IFADDR,       /* MT_IFADDR    13         interface address */
 548         M_MBUF,         /* MT_CONTROL   14         extra-data protocol message */
 549         M_MBUF,         /* MT_OOBDATA   15         expedited data  */
 550 #ifdef DATAKIT
 551         25, 26, 27, 28, 29, 30, 31, 32          /* datakit ugliness */
 552 #endif
 553 };
 554 #endif
 555 #endif
 556
 557 #ifdef LOCAL_OSKIT_DEFINED
 558 #undef LOCAL_OSKIT_DEFINED
 559 #undef OSKIT
 560 #endif
 561
 562 #endif /* !_SYS_MBUF_H_ */