bsd/kern/kern_malloc.c

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1987, 1991, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)kern_malloc.c       8.4 (Berkeley) 5/20/95
  59  */
  60
  61 #include <sys/param.h>
  62 #include <sys/malloc.h>
  63
  64 #include <sys/socket.h>
  65 #include <sys/socketvar.h>
  66
  67 #include <net/route.h>
  68
  69 #include <netinet/in.h>
  70 #include <netinet/in_systm.h>
  71 #include <netinet/ip.h>
  72 #include <netinet/in_pcb.h>
  73
  74 #include <sys/event.h>
  75 #include <sys/eventvar.h>
  76
  77 #include <sys/proc.h>
  78 #include <sys/mount.h>
  79 #include <sys/vnode.h>
  80 #include <sys/namei.h>
  81 #include <sys/file.h>
  82 #include <sys/filedesc.h>
  83 #include <sys/tty.h>
  84 #include <sys/quota.h>
  85
  86 #include <ufs/ufs/inode.h>
  87
  88 #include <hfs/hfs_cnode.h>
  89 #include <isofs/cd9660/cd9660_node.h>
  90
  91 #include <miscfs/volfs/volfs.h>
  92 #include <miscfs/specfs/specdev.h>
  93
  94 #include <nfs/rpcv2.h>
  95 #include <nfs/nfsproto.h>
  96 #include <nfs/nfsnode.h>
  97 #include <nfs/nfsmount.h>
  98 #include <nfs/nqnfs.h>
  99
 100 #include <vfs/vfs_journal.h>
 101
 102 #include <mach/mach_types.h>
 103
 104 #include <kern/zalloc.h>
 105 #include <kern/kalloc.h>
 106
 107 struct kmemstats kmemstats[M_LAST];
 108 char *memname[] = INITKMEMNAMES;
 109
 110 struct kmzones {
 111         size_t          kz_elemsize;
 112         void            *kz_zalloczone;
 113 #define KMZ_CREATEZONE          ((void *)-2)
 114 #define KMZ_LOOKUPZONE          ((void *)-1)
 115 #define KMZ_MALLOC              ((void *)0)
 116 #define KMZ_SHAREZONE           ((void *)1)
 117 } kmzones[M_LAST] = {
 118 #define SOS(sname)      sizeof (struct sname)
 119 #define SOX(sname)      -1
 120         -1,             0,                      /* 0 M_FREE */
 121         MSIZE,          KMZ_CREATEZONE,         /* 1 M_MBUF */
 122         0,              KMZ_MALLOC,             /* 2 M_DEVBUF */
 123         SOS(socket),    KMZ_CREATEZONE,         /* 3 M_SOCKET */
 124         SOS(inpcb),     KMZ_LOOKUPZONE,         /* 4 M_PCB */
 125         M_MBUF,         KMZ_SHAREZONE,          /* 5 M_RTABLE */
 126         M_MBUF,         KMZ_SHAREZONE,          /* 6 M_HTABLE */
 127         M_MBUF,         KMZ_SHAREZONE,          /* 7 M_FTABLE */
 128         SOS(rusage),    KMZ_CREATEZONE,         /* 8 M_ZOMBIE */
 129         0,              KMZ_MALLOC,             /* 9 M_IFADDR */
 130         M_MBUF,         KMZ_SHAREZONE,          /* 10 M_SOOPTS */
 131         0,              KMZ_MALLOC,             /* 11 M_SONAME */
 132         MAXPATHLEN,     KMZ_CREATEZONE,         /* 12 M_NAMEI */
 133         0,              KMZ_MALLOC,             /* 13 M_GPROF */
 134         0,              KMZ_MALLOC,             /* 14 M_IOCTLOPS */
 135         0,              KMZ_MALLOC,             /* 15 M_MAPMEM */
 136         SOS(ucred),     KMZ_CREATEZONE,         /* 16 M_CRED */
 137         SOS(pgrp),      KMZ_CREATEZONE,         /* 17 M_PGRP */
 138         SOS(session),   KMZ_CREATEZONE,         /* 18 M_SESSION */
 139         SOS(iovec),     KMZ_LOOKUPZONE,         /* 19 M_IOV */
 140         SOS(mount),     KMZ_CREATEZONE,         /* 20 M_MOUNT */
 141         0,              KMZ_MALLOC,             /* 21 M_FHANDLE */
 142         SOS(nfsreq),    KMZ_CREATEZONE,         /* 22 M_NFSREQ */
 143         SOS(nfsmount),  KMZ_CREATEZONE,         /* 23 M_NFSMNT */
 144         SOS(nfsnode),   KMZ_CREATEZONE,         /* 24 M_NFSNODE */
 145         SOS(vnode),     KMZ_CREATEZONE,         /* 25 M_VNODE */
 146         SOS(namecache), KMZ_CREATEZONE,         /* 26 M_CACHE */
 147         SOX(dquot),     KMZ_LOOKUPZONE,         /* 27 M_DQUOT */
 148         SOX(ufsmount),  KMZ_LOOKUPZONE,         /* 28 M_UFSMNT */
 149         0,              KMZ_MALLOC,             /* 29 M_CGSUM */
 150         0,              KMZ_MALLOC,             /* 30 M_VMMAP */
 151         0,              KMZ_MALLOC,             /* 31 M_VMMAPENT */
 152         0,              KMZ_MALLOC,             /* 32 M_VMOBJ */
 153         0,              KMZ_MALLOC,             /* 33 M_VMOBJHASH */
 154         0,              KMZ_MALLOC,             /* 34 M_VMPMAP */
 155         0,              KMZ_MALLOC,             /* 35 M_VMPVENT */
 156         0,              KMZ_MALLOC,             /* 36 M_VMPAGER */
 157         0,              KMZ_MALLOC,             /* 37 M_VMPGDATA */
 158         SOS(file),      KMZ_CREATEZONE,         /* 38 M_FILE */
 159         SOS(filedesc),  KMZ_CREATEZONE,         /* 39 M_FILEDESC */
 160         SOX(lockf),     KMZ_CREATEZONE,         /* 40 M_LOCKF */
 161         SOS(proc),      KMZ_CREATEZONE,         /* 41 M_PROC */
 162         SOS(pcred),     KMZ_CREATEZONE,         /* 42 M_SUBPROC */
 163         0,              KMZ_MALLOC,             /* 43 M_SEGMENT */
 164         M_FFSNODE,      KMZ_SHAREZONE,          /* 44 M_LFSNODE */
 165         SOS(inode),     KMZ_CREATEZONE,         /* 45 M_FFSNODE */
 166         M_FFSNODE,      KMZ_SHAREZONE,          /* 46 M_MFSNODE */
 167         SOS(nqlease),   KMZ_CREATEZONE,         /* 47 M_NQLEASE */
 168         SOS(nqm),       KMZ_CREATEZONE,         /* 48 M_NQMHOST */
 169         0,              KMZ_MALLOC,             /* 49 M_NETADDR */
 170         SOX(nfssvc_sock),
 171                         KMZ_CREATEZONE,         /* 50 M_NFSSVC */
 172         SOS(nfsuid),    KMZ_CREATEZONE,         /* 51 M_NFSUID */
 173         SOX(nfsrvcache),
 174                         KMZ_CREATEZONE,         /* 52 M_NFSD */
 175         SOX(ip_moptions),
 176                         KMZ_LOOKUPZONE,         /* 53 M_IPMOPTS */
 177         SOX(in_multi),  KMZ_LOOKUPZONE,         /* 54 M_IPMADDR */
 178         SOX(ether_multi),
 179                         KMZ_LOOKUPZONE,         /* 55 M_IFMADDR */
 180         SOX(mrt),       KMZ_CREATEZONE,         /* 56 M_MRTABLE */
 181         SOX(iso_mnt),   KMZ_LOOKUPZONE,         /* 57 M_ISOFSMNT */
 182         SOS(iso_node),  KMZ_CREATEZONE,         /* 58 M_ISOFSNODE */
 183         SOS(nfsrv_descript),
 184                         KMZ_CREATEZONE,         /* 59 M_NFSRVDESC */
 185         SOS(nfsdmap),   KMZ_CREATEZONE,         /* 60 M_NFSDIROFF */
 186         SOS(fhandle),   KMZ_LOOKUPZONE,         /* 61 M_NFSBIGFH */
 187         0,              KMZ_MALLOC,             /* 62 M_MSDOSFSMNT */
 188         0,              KMZ_MALLOC,             /* 63 M_MSDOSFSFAT */
 189         0,              KMZ_MALLOC,             /* 64 M_MSDOSFSNODE */
 190         SOS(tty),       KMZ_CREATEZONE,         /* 65 M_TTYS */
 191         0,              KMZ_MALLOC,             /* 66 M_EXEC */
 192         0,              KMZ_MALLOC,             /* 67 M_MISCFSMNT */
 193         0,              KMZ_MALLOC,             /* 68 M_MISCFSNODE */
 194         0,              KMZ_MALLOC,             /* 69 M_ADOSFSMNT */
 195         0,              KMZ_MALLOC,             /* 70 M_ADOSFSNODE */
 196         0,              KMZ_MALLOC,             /* 71 M_ANODE */
 197         SOX(buf),       KMZ_CREATEZONE,         /* 72 M_BUFHDR */
 198         (NDFILE * OFILESIZE),
 199                         KMZ_CREATEZONE,         /* 73 M_OFILETABL */
 200         MCLBYTES,       KMZ_CREATEZONE,         /* 74 M_MCLUST */
 201         SOX(hfsmount),  KMZ_LOOKUPZONE,         /* 75 M_HFSMNT */
 202         SOS(cnode),     KMZ_CREATEZONE,         /* 76 M_HFSNODE */
 203         SOS(filefork),  KMZ_CREATEZONE,         /* 77 M_HFSFORK */
 204         SOX(volfs_mntdata),     KMZ_LOOKUPZONE,         /* 78 M_VOLFSMNT */
 205         SOS(volfs_vndata),      KMZ_CREATEZONE,         /* 79 M_VOLFSNODE */
 206         0,              KMZ_MALLOC,             /* 80 M_TEMP */
 207         0,              KMZ_MALLOC,             /* 81 M_SECA */
 208         0,              KMZ_MALLOC,             /* 82 M_DEVFS */
 209         0,              KMZ_MALLOC,             /* 83 M_IPFW */
 210         0,              KMZ_MALLOC,             /* 84 M_UDFNODE */
 211         0,              KMZ_MALLOC,             /* 85 M_UDFMOUNT */
 212         0,              KMZ_MALLOC,             /* 86 M_IP6NDP */
 213         0,              KMZ_MALLOC,             /* 87 M_IP6OPT */
 214         0,              KMZ_MALLOC,             /* 88 M_IP6MISC */
 215         0,              KMZ_MALLOC,             /* 89 M_TSEGQ */
 216         0,              KMZ_MALLOC,             /* 90 M_IGMP */
 217         SOS(journal), KMZ_CREATEZONE,     /* 91 M_JNL_JNL */
 218         SOS(transaction), KMZ_CREATEZONE,     /* 92 M_JNL_TR */
 219         SOS(specinfo), KMZ_CREATEZONE,          /* 93 M_SPECINFO */
 220         SOS(kqueue), KMZ_CREATEZONE,            /* 94 M_KQUEUE */
 221 #undef  SOS
 222 #undef  SOX
 223 };
 224
 225 extern zone_t kalloc_zone(vm_size_t);   /* XXX */
 226
 227 /*
 228  * Initialize the kernel memory allocator
 229  */
 230 void
 231 kmeminit(void)
 232 {
 233         struct kmzones  *kmz;
 234
 235         if ((sizeof(kmzones)/sizeof(kmzones[0])) != (sizeof(memname)/sizeof(memname[0]))) {
 236                 panic("kmeminit: kmzones has %d elements but memname has %d\n",
 237                           (sizeof(kmzones)/sizeof(kmzones[0])), (sizeof(memname)/sizeof(memname[0])));
 238         }
 239
 240         kmz = kmzones;
 241         while (kmz < &kmzones[M_LAST]) {
 242 /* XXX */
 243                 if (kmz->kz_elemsize == -1)
 244                         ;
 245                 else
 246 /* XXX */
 247                 if (kmz->kz_zalloczone == KMZ_CREATEZONE) {
 248                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 249                                                 1024 * 1024, PAGE_SIZE,
 250                                                 memname[kmz - kmzones]);
 251                 }
 252                 else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE)
 253                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 254
 255                 kmz++;
 256         }
 257
 258         kmz = kmzones;
 259         while (kmz < &kmzones[M_LAST]) {
 260 /* XXX */
 261                 if (kmz->kz_elemsize == -1)
 262                         ;
 263                 else
 264 /* XXX */
 265                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 266                         kmz->kz_zalloczone =
 267                                 kmzones[kmz->kz_elemsize].kz_zalloczone;
 268                         kmz->kz_elemsize =
 269                                 kmzones[kmz->kz_elemsize].kz_elemsize;
 270                 }
 271
 272                 kmz++;
 273         }
 274 }
 275
 276 #define MDECL(reqlen)                                   \
 277 union {                                                 \
 278         struct  _mhead hdr;                             \
 279         char    _m[(reqlen) + sizeof (struct _mhead)];  \
 280 }
 281
 282 struct _mhead {
 283         size_t  mlen;
 284         char    dat[0];
 285 };
 286
 287 #define ZEROSIZETOKEN (void *)0xFADEDFAD
 288
 289 void *_MALLOC(
 290         size_t          size,
 291         int             type,
 292         int             flags)
 293 {
 294         MDECL(size)     *mem;
 295         size_t          memsize = sizeof (*mem);
 296
 297         if (type >= M_LAST)
 298                 panic("_malloc TYPE");
 299
 300         /*
 301          * On zero request we do not return zero as that
 302          * could be mistaken for ENOMEM.
 303          */
 304         if (size == 0)
 305                 return (ZEROSIZETOKEN);
 306
 307         if (flags & M_NOWAIT) {
 308                 mem = (void *)kalloc_noblock(memsize);
 309         } else {
 310                 mem = (void *)kalloc(memsize);
 311         }
 312         if (!mem)
 313                 return (0);
 314
 315         mem->hdr.mlen = memsize;
 316
 317         if (flags & M_ZERO)
 318                 bzero(mem->hdr.dat, size);
 319
 320         return  (mem->hdr.dat);
 321 }
 322
 323 void _FREE(
 324         void            *addr,
 325         int             type)
 326 {
 327         struct _mhead   *hdr;
 328
 329         if (type >= M_LAST)
 330                 panic("_free TYPE");
 331
 332         if (addr == (void *)ZEROSIZETOKEN)
 333                 return;
 334         if (!addr)
 335                 return; /* correct (convenient bsd kernel legacy) */
 336
 337         hdr = addr; hdr--;
 338         kfree((vm_offset_t)hdr, hdr->mlen);
 339 }
 340
 341 void *_MALLOC_ZONE(
 342         size_t          size,
 343         int             type,
 344         int             flags)
 345 {
 346         struct kmzones  *kmz;
 347         void            *elem;
 348
 349         if (type >= M_LAST)
 350                 panic("_malloc_zone TYPE");
 351
 352         kmz = &kmzones[type];
 353         if (kmz->kz_zalloczone == KMZ_MALLOC)
 354                 panic("_malloc_zone ZONE");
 355
 356 /* XXX */
 357         if (kmz->kz_elemsize == -1)
 358                 panic("_malloc_zone XXX");
 359 /* XXX */
 360         if (size == kmz->kz_elemsize)
 361                 if (flags & M_NOWAIT) {
 362                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 363                 } else {
 364                         elem = (void *)zalloc(kmz->kz_zalloczone);
 365                 }
 366         else
 367                 if (flags & M_NOWAIT) {
 368                         elem = (void *)kalloc_noblock(size);
 369                 } else {
 370                         elem = (void *)kalloc(size);
 371                 }
 372
 373         return (elem);
 374 }
 375
 376 void _FREE_ZONE(
 377         void            *elem,
 378         size_t          size,
 379         int             type)
 380 {
 381         struct kmzones  *kmz;
 382
 383         if (type >= M_LAST)
 384                 panic("FREE_SIZE");
 385
 386         kmz = &kmzones[type];
 387         if (kmz->kz_zalloczone == KMZ_MALLOC)
 388                 panic("free_zone ZONE");
 389
 390 /* XXX */
 391         if (kmz->kz_elemsize == -1)
 392                 panic("FREE_SIZE XXX");
 393 /* XXX */
 394         if (size == kmz->kz_elemsize)
 395                 zfree(kmz->kz_zalloczone, (vm_offset_t)elem);
 396         else
 397                 kfree((vm_offset_t)elem, size);
 398 }