reactos/lib/drivers/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 /*
  61  * Mbufs are of a single size, MSIZE (machine/machparam.h), which
  62  * includes overhead.  An mbuf may add a single "mbuf cluster" of size
  63  * MCLBYTES (also in machine/machparam.h), which has no additional overhead
  64  * and is used instead of the internal data area; this is done when
  65  * at least MINCLSIZE of data must be stored.
  66  */
  67
  68 #define MLEN            (MSIZE - sizeof(struct m_hdr))  /* normal data len */
  69 #define MHLEN           (MLEN - sizeof(struct pkthdr))  /* data len w/pkthdr */
  70
  71 #define MINCLSIZE       (MHLEN + MLEN)  /* smallest amount to put in cluster */
  72 #define M_MAXCOMPRESS   (MHLEN / 2)     /* max amount to copy for compression */
  73
  74 /*
  75  * Macros for type conversion
  76  * mtod(m,t) -  convert mbuf pointer to data pointer of correct type
  77  * dtom(x) -    convert data pointer within mbuf to mbuf pointer (XXX)
  78  * mtocl(x) -   convert pointer within cluster to cluster index #
  79  * cltom(x) -   convert cluster # to ptr to beginning of cluster
  80  */
  81 #define mtod(m,t)       ((t)((m)->m_data))
  82 #ifndef __REACTOS__
  83 #define dtom(x)         ((struct mbuf *)((int)(x) & ~(MSIZE-1)))
  84 #else
  85 #define dtom(x)         ((struct mbuf *)((int)(x) - sizeof(struct m_hdr)))
  86 #endif
  87 #ifndef OSKIT
  88 #define mtocl(x)        (((u_int)(x) - (u_int)mbutl) >> MCLSHIFT)
  89 #define cltom(x)        ((caddr_t)((u_int)mbutl + ((u_int)(x) << MCLSHIFT)))
  90 #endif /* OSKIT */
  91
  92 /* header at beginning of each mbuf: */
  93 struct m_hdr {
  94         struct  mbuf *mh_next;          /* next buffer in chain */
  95         struct  mbuf *mh_nextpkt;       /* next chain in queue/record */
  96         int     mh_len;                 /* amount of data in this mbuf */
  97         caddr_t mh_data;                /* location of data */
  98         short   mh_type;                /* type of data in this mbuf */
  99         short   mh_flags;               /* flags; see below */
 100 };
 101
 102 /* record/packet header in first mbuf of chain; valid if M_PKTHDR set */
 103 struct  pkthdr {
 104         int     len;            /* total packet length */
 105         struct  ifnet *rcvif;   /* rcv interface */
 106 };
 107
 108 /* description of external storage mapped into mbuf, valid if M_EXT set */
 109 struct m_ext {
 110         caddr_t ext_buf;                /* start of buffer */
 111 #ifdef OSKIT
 112         struct oskit_bufio      *ext_bufio;     /* OS Kit bufio pointer */
 113 #else
 114         void    (*ext_free)             /* free routine if not the usual */
 115                 __P((caddr_t, u_int));
 116 #endif
 117         u_int   ext_size;               /* size of buffer, for ext_free */
 118 };
 119
 120 struct mbuf {
 121         struct  m_hdr m_hdr;
 122         union {
 123                 struct {
 124                         struct  pkthdr MH_pkthdr;       /* M_PKTHDR set */
 125                         union {
 126                                 struct  m_ext MH_ext;   /* M_EXT set */
 127                                 char    MH_databuf[MHLEN];
 128                         } MH_dat;
 129                 } MH;
 130                 char    M_databuf[MLEN];                /* !M_PKTHDR, !M_EXT */
 131         } M_dat;
 132 };
 133 #define m_next          m_hdr.mh_next
 134 #define m_len           m_hdr.mh_len
 135 #define m_data          m_hdr.mh_data
 136 #define m_type          m_hdr.mh_type
 137 #define m_flags         m_hdr.mh_flags
 138 #define m_nextpkt       m_hdr.mh_nextpkt
 139 #define m_act           m_nextpkt
 140 #define m_pkthdr        M_dat.MH.MH_pkthdr
 141 #define m_ext           M_dat.MH.MH_dat.MH_ext
 142 #define m_pktdat        M_dat.MH.MH_dat.MH_databuf
 143 #define m_dat           M_dat.M_databuf
 144
 145 /* mbuf flags */
 146 #if defined(OSKIT) && !defined(__REACTOS__)
 147 #include <oskit/io/bufio.h>
 148 /*
 149  * A small step for mankind, but a huge leap for BSD:
 150  * We consistently use oskit_bufios for external mbufs
 151  */
 152 #endif
 153 #define M_EXT           0x0001  /* has associated external storage */
 154 #define M_PKTHDR        0x0002  /* start of record */
 155 #define M_EOR           0x0004  /* end of record */
 156
 157 /* mbuf pkthdr flags, also in m_flags */
 158 #define M_BCAST         0x0100  /* send/received as link-level broadcast */
 159 #define M_MCAST         0x0200  /* send/received as link-level multicast */
 160
 161 /* flags copied when copying m_pkthdr */
 162 #define M_COPYFLAGS     (M_PKTHDR|M_EOR|M_BCAST|M_MCAST)
 163
 164 /* mbuf types */
 165 #define MT_FREE         0       /* should be on free list */
 166 #define MT_DATA         1       /* dynamic (data) allocation */
 167 #define MT_HEADER       2       /* packet header */
 168 #define MT_SOCKET       3       /* socket structure */
 169 #define MT_PCB          4       /* protocol control block */
 170 #define MT_RTABLE       5       /* routing tables */
 171 #define MT_HTABLE       6       /* IMP host tables */
 172 #define MT_ATABLE       7       /* address resolution tables */
 173 #define MT_SONAME       8       /* socket name */
 174 #define MT_SOOPTS       10      /* socket options */
 175 #define MT_FTABLE       11      /* fragment reassembly header */
 176 #define MT_RIGHTS       12      /* access rights */
 177 #define MT_IFADDR       13      /* interface address */
 178 #define MT_CONTROL      14      /* extra-data protocol message */
 179 #define MT_OOBDATA      15      /* expedited data  */
 180
 181 /* flags to m_get/MGET */
 182 #define M_DONTWAIT      M_NOWAIT
 183 #define M_WAIT          M_WAITOK
 184
 185 /*
 186  * mbuf utility macros:
 187  *
 188  *      MBUFLOCK(code)
 189  * prevents a section of code from from being interrupted by network
 190  * drivers.
 191  */
 192 #define MBUFLOCK(code) \
 193         { int ms = splimp(); \
 194           { code } \
 195           splx(ms); \
 196         }
 197
 198 /*
 199  * mbuf allocation/deallocation macros:
 200  *
 201  *      MGET(struct mbuf *m, int how, int type)
 202  * allocates an mbuf and initializes it to contain internal data.
 203  *
 204  *      MGETHDR(struct mbuf *m, int how, int type)
 205  * allocates an mbuf and initializes it to contain a packet header
 206  * and internal data.
 207  */
 208 #define MGET(m, how, type) { \
 209         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 210         OS_DbgPrint(OSK_MID_TRACE,("(MGET) got mbuf @ %x\n", m)); \
 211         if (m) { \
 212                 (m)->m_type = (type); \
 213                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 214                 (m)->m_next = (struct mbuf *)NULL; \
 215                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 216                 (m)->m_data = (m)->m_dat; \
 217                 (m)->m_flags = 0; \
 218         } else \
 219                 (m) = m_retry((how), (type)); \
 220 }
 221
 222 #define MGETHDR(m, how, type) { \
 223         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 224         OS_DbgPrint(OSK_MID_TRACE,("(MGETHDR) got mbuf @ %x\n", m)); \
 225         if (m) { \
 226                 (m)->m_type = (type); \
 227                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 228                 (m)->m_next = (struct mbuf *)NULL; \
 229                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 230                 (m)->m_data = (m)->m_pktdat; \
 231                 (m)->m_flags = M_PKTHDR; \
 232         } else \
 233                 (m) = m_retryhdr((how), (type)); \
 234 }
 235
 236 #ifdef OSKIT
 237 #define MGET_DONT_RECURSE(m, how, type) { \
 238         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 239         OS_DbgPrint(OSK_MID_TRACE,("(MGET_DONT_RECURSE) got mbuf @ %x\n", m)); \
 240         if (m) { \
 241                 (m)->m_type = (type); \
 242                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 243                 (m)->m_next = (struct mbuf *)NULL; \
 244                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 245                 (m)->m_data = (m)->m_dat; \
 246                 (m)->m_flags = 0; \
 247         } else \
 248                 (m) = (struct mbuf *)0; \
 249 }
 250
 251 #define MGETHDR_DONT_RECURSE(m, how, type) { \
 252         MALLOC((m), struct mbuf *, MSIZE, mbtypes[type], (how)); \
 253         OS_DbgPrint(OSK_MID_TRACE,("(MGETHDR_DONT_RECURSE) got mbuf @ %x\n", m)); \
 254         if (m) { \
 255                 (m)->m_type = (type); \
 256                 MBUFLOCK(mbstat.m_mtypes[type]++;) \
 257                 (m)->m_next = (struct mbuf *)NULL; \
 258                 (m)->m_nextpkt = (struct mbuf *)NULL; \
 259                 (m)->m_data = (m)->m_pktdat; \
 260                 (m)->m_flags = M_PKTHDR; \
 261         } else \
 262                 (m) = (struct mbuf *)0; \
 263 }
 264 #endif /* OSKIT */
 265
 266 #ifndef OSKIT
 267 /*
 268  * Mbuf cluster macros.
 269  * MCLALLOC(caddr_t p, int how) allocates an mbuf cluster.
 270  * MCLGET adds such clusters to a normal mbuf;
 271  * the flag M_EXT is set upon success.
 272  * MCLFREE releases a reference to a cluster allocated by MCLALLOC,
 273  * freeing the cluster if the reference count has reached 0.
 274  *
 275  * Normal mbuf clusters are normally treated as character arrays
 276  * after allocation, but use the first word of the buffer as a free list
 277  * pointer while on the free list.
 278  */
 279 union mcluster {
 280         union   mcluster *mcl_next;
 281         char    mcl_buf[MCLBYTES];
 282 };
 283
 284 #define MCLALLOC(p, how) \
 285         MBUFLOCK( \
 286           OS_DbgPrint(OSK_MID_TRACE,("(MCLALLOC)\n")); \
 287           if (mclfree == 0) \
 288                 (void)m_clalloc(1, (how)); \
 289           (p) = (caddr_t)mclfree; \
 290           if ((p)) { \
 291                 ++mclrefcnt[mtocl(p)]; \
 292                 mbstat.m_clfree--; \
 293                 mclfree = ((union mcluster *)(p))->mcl_next; \
 294           } \
 295         )
 296
 297 #define MCLGET(m, how) \
 298         { MCLALLOC((m)->m_ext.ext_buf, (how)); \
 299           OS_DbgPrint(OSK_MID_TRACE,("(MCLGET) m = %x\n", m)); \
 300           if ((m)->m_ext.ext_buf != NULL) { \
 301                 (m)->m_data = (m)->m_ext.ext_buf; \
 302                 (m)->m_flags |= M_EXT; \
 303                 (m)->m_ext.ext_size = MCLBYTES;  \
 304           } \
 305         }
 306
 307 #define MCLFREE(p) \
 308         MBUFLOCK ( \
 309           OS_DbgPrint(OSK_MID_TRACE,("(MCLFREE)\n")); \
 310           if (--mclrefcnt[mtocl(p)] == 0) { \
 311                 ((union mcluster *)(p))->mcl_next = mclfree; \
 312                 mclfree = (union mcluster *)(p); \
 313                 mbstat.m_clfree++; \
 314           } \
 315         )
 316 #else
 317 #define MCLGET(m, how) \
 318         { (m)->m_ext.ext_bufio = oskit_bufio_create(MCLBYTES); \
 319           OS_DbgPrint(OSK_MID_TRACE,("(!OSKIT MCLGET)\n")); \
 320           oskit_bufio_map((m)->m_ext.ext_bufio, \
 321                 (void **)&((m)->m_ext.ext_buf), 0, MCLBYTES);   \
 322           if ((m)->m_ext.ext_buf != NULL) { \
 323                 (m)->m_data = (m)->m_ext.ext_buf; \
 324                 (m)->m_flags |= M_EXT; \
 325                 (m)->m_ext.ext_size = MCLBYTES;  \
 326           } \
 327         }
 328 #endif /* !OSKIT */
 329
 330 /*
 331  * MFREE(struct mbuf *m, struct mbuf *n)
 332  * Free a single mbuf and associated external storage.
 333  * Place the successor, if any, in n.
 334  */
 335 #ifdef notyet
 336 #define MFREE(m, n) \
 337         { MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--;) \
 338           if ((m)->m_flags & M_EXT) { \
 339                 if ((m)->m_ext.ext_free) \
 340                         (*((m)->m_ext.ext_free))((m)->m_ext.ext_buf, \
 341                             (m)->m_ext.ext_size); \
 342                 else \
 343                         MCLFREE((m)->m_ext.ext_buf); \
 344           } \
 345           (n) = (m)->m_next; \
 346           FREE((m), mbtypes[(m)->m_type]); \
 347           m = NULL; \
 348         }
 349 #else /* notyet */
 350 #ifdef OSKIT
 351 #define MFREE(m, nn) \
 352         { MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--;) \
 353           OS_DbgPrint(OSK_MID_TRACE,("(OSKIT MFREE) m = %x\n", m)); \
 354           if ((m)->m_flags & M_EXT) { \
 355                 oskit_bufio_release((m)->m_ext.ext_bufio);      \
 356           } \
 357           (nn) = (m)->m_next; \
 358           FREE((m), mbtypes[(m)->m_type]); \
 359           m = NULL; \
 360         }
 361 #else /* !OSKIT */
 362 #define MFREE(m, nn) \
 363         { MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--;) \
 364           OS_DbgPrint(OSK_MID_TRACE,("(!OSKIT MFREE) m = %x\n", m)); \
 365           if ((m)->m_flags & M_EXT) { \
 366                 MCLFREE((m)->m_ext.ext_buf); \
 367           } \
 368           (nn) = (m)->m_next; \
 369           FREE((m), mbtypes[(m)->m_type]); \
 370           m = NULL; \
 371         }
 372 #endif /* OSKIT */
 373 #endif
 374
 375 /*
 376  * Copy mbuf pkthdr from from to to.
 377  * from must have M_PKTHDR set, and to must be empty.
 378  */
 379 #define M_COPY_PKTHDR(to, from) { \
 380         OS_DbgPrint(OSK_MID_TRACE,("(M_COPY_PKTHDR) to %x from %x\n", to, from)); \
 381         (to)->m_pkthdr = (from)->m_pkthdr; \
 382         (to)->m_flags = (from)->m_flags & M_COPYFLAGS; \
 383         (to)->m_data = (to)->m_pktdat; \
 384 }
 385
 386 /*
 387  * Set the m_data pointer of a newly-allocated mbuf (m_get/MGET) to place
 388  * an object of the specified size at the end of the mbuf, longword aligned.
 389  */
 390 #define M_ALIGN(m, len) \
 391         { \
 392           OS_DbgPrint(OSK_MID_TRACE,("(M_ALIGN) %d @ %x\n", m, len)); \
 393           (m)->m_data += (MLEN - (len)) &~ (sizeof(long) - 1); \
 394         }
 395 /*
 396  * As above, for mbufs allocated with m_gethdr/MGETHDR
 397  * or initialized by M_COPY_PKTHDR.
 398  */
 399 #define MH_ALIGN(m, len) \
 400         { \
 401           OS_DbgPrint(OSK_MID_TRACE,("(MH_ALIGN) %d @ %x\n", m, len)); \
 402           (m)->m_data += (MHLEN - (len)) &~ (sizeof(long) - 1); \
 403         }
 404
 405 /*
 406  * Compute the amount of space available
 407  * before the current start of data in an mbuf.
 408  */
 409 #ifdef OSKIT
 410 /* Be bold and strong: why shouldn't that work??? */
 411 #define M_LEADINGSPACE(m) \
 412         ((m)->m_flags & M_EXT ? (m)->m_data - (m)->m_ext.ext_buf : \
 413             (m)->m_flags & M_PKTHDR ? (m)->m_data - (m)->m_pktdat : \
 414             (m)->m_data - (m)->m_dat)
 415 #else
 416 #define M_LEADINGSPACE(m) \
 417         ((m)->m_flags & M_EXT ? /* (m)->m_data - (m)->m_ext.ext_buf */ 0 : \
 418             (m)->m_flags & M_PKTHDR ? (m)->m_data - (m)->m_pktdat : \
 419             (m)->m_data - (m)->m_dat)
 420 #endif /* OSKIT */
 421
 422 /*
 423  * Compute the amount of space available
 424  * after the end of data in an mbuf.
 425  */
 426 #define M_TRAILINGSPACE(m) \
 427         OS_DbgPrint(OSK_MID_TRACE,("(M_TRAILINGSPACE) %x\n", m)); \
 428         ((m)->m_flags & M_EXT ? (m)->m_ext.ext_buf + (m)->m_ext.ext_size - \
 429             ((m)->m_data + (m)->m_len) : \
 430             &(m)->m_dat[MLEN] - ((m)->m_data + (m)->m_len))
 431
 432 /*
 433  * Arrange to prepend space of size plen to mbuf m.
 434  * If a new mbuf must be allocated, how specifies whether to wait.
 435  * If how is M_DONTWAIT and allocation fails, the original mbuf chain
 436  * is freed and m is set to NULL.
 437  */
 438 #define M_PREPEND(m, plen, how) { \
 439         OS_DbgPrint(OSK_MID_TRACE,("(M_PREPEND) %d on %x\n", plen, m)); \
 440         if (M_LEADINGSPACE(m) >= (plen)) { \
 441                 (m)->m_data -= (plen); \
 442                 (m)->m_len += (plen); \
 443         } else \
 444                 (m) = m_prepend((m), (plen), (how)); \
 445         if ((m) && (m)->m_flags & M_PKTHDR) \
 446                 (m)->m_pkthdr.len += (plen); \
 447 }
 448
 449 /* change mbuf to new type */
 450 #define MCHTYPE(m, t) { \
 451         OS_DbgPrint(OSK_MID_TRACE,("(MCHTYPE) %x %x\n", m, t)); \
 452         MBUFLOCK(mbstat.m_mtypes[(m)->m_type]--; mbstat.m_mtypes[t]++;) \
 453         (m)->m_type = t;\
 454 }
 455
 456 /* length to m_copy to copy all */
 457 #define M_COPYALL       1000000000
 458
 459 /* compatiblity with 4.3 */
 460 #define  m_copy(m, o, l)        m_copym((m), (o), (l), M_DONTWAIT)
 461
 462 /*
 463  * Mbuf statistics.
 464  */
 465 struct mbstat {
 466         u_long  m_mbufs;        /* mbufs obtained from page pool */
 467         u_long  m_clusters;     /* clusters obtained from page pool */
 468         u_long  m_spare;        /* spare field */
 469         u_long  m_clfree;       /* free clusters */
 470         u_long  m_drops;        /* times failed to find space */
 471         u_long  m_wait;         /* times waited for space */
 472         u_long  m_drain;        /* times drained protocols for space */
 473         u_short m_mtypes[256];  /* type specific mbuf allocations */
 474 };
 475
 476 #ifdef  KERNEL
 477 #ifndef OSKIT
 478 extern  struct mbuf *mbutl;             /* virtual address of mclusters */
 479 extern  char *mclrefcnt;                /* cluster reference counts */
 480 #endif /* !OSKIT */
 481 struct  mbstat mbstat;
 482 #ifndef OSKIT
 483 extern  int nmbclusters;
 484 union   mcluster *mclfree;
 485 #endif /* !OSKIT */
 486 int     max_linkhdr;                    /* largest link-level header */
 487 int     max_protohdr;                   /* largest protocol header */
 488 int     max_hdr;                        /* largest link+protocol header */
 489 int     max_datalen;                    /* MHLEN - max_hdr */
 490 extern  int mbtypes[];                  /* XXX */
 491
 492 int     m_clalloc __P((int, int));
 493 void    m_copyback __P((struct mbuf *, int, int, caddr_t));
 494 struct  mbuf *m_retry __P((int, int));
 495 struct  mbuf *m_retryhdr __P((int, int));
 496 void    m_reclaim __P((void));
 497 struct  mbuf *m_get __P((int, int));
 498 struct  mbuf *m_gethdr __P((int, int));
 499 struct  mbuf *m_getclr __P((int, int));
 500 struct  mbuf *m_free __P((struct mbuf *));
 501 void    m_freem __P((struct mbuf *));
 502 struct  mbuf *m_prepend __P((struct mbuf *,int,int));
 503 struct  mbuf *m_copym __P((struct mbuf *, int, int, int));
 504 void    m_copydata __P((struct mbuf *,int,int,caddr_t));
 505 void    m_cat __P((struct mbuf *,struct mbuf *));
 506 void    m_adj __P((struct mbuf *,int));
 507 struct  mbuf *m_pullup __P((struct mbuf *, int));
 508 struct  mbuf *m_split __P((struct mbuf *,int,int));
 509 struct  mbuf *m_devget __P((char *, int, int, struct ifnet *,
 510                             void (*copy)(struct mbuf *, caddr_t, u_int)));
 511
 512 #ifdef MBTYPES
 513 int mbtypes[] = {                               /* XXX */
 514         M_FREE,         /* MT_FREE      0          should be on free list */
 515         M_MBUF,         /* MT_DATA      1          dynamic (data) allocation */
 516         M_MBUF,         /* MT_HEADER    2          packet header */
 517         M_SOCKET,       /* MT_SOCKET    3          socket structure */
 518         M_PCB,          /* MT_PCB       4          protocol control block */
 519         M_RTABLE,       /* MT_RTABLE    5          routing tables */
 520         M_HTABLE,       /* MT_HTABLE    6          IMP host tables */
 521         0,              /* MT_ATABLE    7          address resolution tables */
 522         M_MBUF,         /* MT_SONAME    8          socket name */
 523         0,              /*              9 */
 524         M_SOOPTS,       /* MT_SOOPTS    10         socket options */
 525         M_FTABLE,       /* MT_FTABLE    11         fragment reassembly header */
 526         M_MBUF,         /* MT_RIGHTS    12         access rights */
 527         M_IFADDR,       /* MT_IFADDR    13         interface address */
 528         M_MBUF,         /* MT_CONTROL   14         extra-data protocol message */
 529         M_MBUF,         /* MT_OOBDATA   15         expedited data  */
 530 #ifdef DATAKIT
 531         25, 26, 27, 28, 29, 30, 31, 32          /* datakit ugliness */
 532 #endif
 533 };
 534 #endif
 535 #endif
 536
 537 #endif /* !_SYS_MBUF_H_ */