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  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1987, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)kern_malloc.c       8.4 (Berkeley) 5/20/95
  56  */
  57
  58 #include <sys/param.h>
  59 #include <sys/malloc.h>
  60
  61 #include <sys/socket.h>
  62 #include <sys/socketvar.h>
  63
  64 #include <net/route.h>
  65
  66 #include <netinet/in.h>
  67 #include <netinet/in_systm.h>
  68 #include <netinet/ip.h>
  69 #include <netinet/in_pcb.h>
  70
  71 #include <sys/event.h>
  72 #include <sys/eventvar.h>
  73
  74 #include <sys/proc.h>
  75 #include <sys/mount.h>
  76 #include <sys/vnode.h>
  77 #include <sys/namei.h>
  78 #include <sys/file.h>
  79 #include <sys/filedesc.h>
  80 #include <sys/tty.h>
  81 #include <sys/quota.h>
  82
  83 #include <ufs/ufs/inode.h>
  84
  85 #include <hfs/hfs_cnode.h>
  86 #include <isofs/cd9660/cd9660_node.h>
  87
  88 #include <miscfs/volfs/volfs.h>
  89 #include <miscfs/specfs/specdev.h>
  90
  91 #include <nfs/rpcv2.h>
  92 #include <nfs/nfsproto.h>
  93 #include <nfs/nfsnode.h>
  94 #include <nfs/nfsmount.h>
  95 #include <nfs/nqnfs.h>
  96
  97 #include <vfs/vfs_journal.h>
  98
  99 #include <mach/mach_types.h>
 100
 101 #include <kern/zalloc.h>
 102 #include <kern/kalloc.h>
 103
 104 struct kmemstats kmemstats[M_LAST];
 105 char *memname[] = INITKMEMNAMES;
 106
 107 struct kmzones {
 108         size_t          kz_elemsize;
 109         void            *kz_zalloczone;
 110 #define KMZ_CREATEZONE          ((void *)-2)
 111 #define KMZ_LOOKUPZONE          ((void *)-1)
 112 #define KMZ_MALLOC              ((void *)0)
 113 #define KMZ_SHAREZONE           ((void *)1)
 114 } kmzones[M_LAST] = {
 115 #define SOS(sname)      sizeof (struct sname)
 116 #define SOX(sname)      -1
 117         -1,             0,                      /* 0 M_FREE */
 118         MSIZE,          KMZ_CREATEZONE,         /* 1 M_MBUF */
 119         0,              KMZ_MALLOC,             /* 2 M_DEVBUF */
 120         SOS(socket),    KMZ_CREATEZONE,         /* 3 M_SOCKET */
 121         SOS(inpcb),     KMZ_LOOKUPZONE,         /* 4 M_PCB */
 122         M_MBUF,         KMZ_SHAREZONE,          /* 5 M_RTABLE */
 123         M_MBUF,         KMZ_SHAREZONE,          /* 6 M_HTABLE */
 124         M_MBUF,         KMZ_SHAREZONE,          /* 7 M_FTABLE */
 125         SOS(rusage),    KMZ_CREATEZONE,         /* 8 M_ZOMBIE */
 126         0,              KMZ_MALLOC,             /* 9 M_IFADDR */
 127         M_MBUF,         KMZ_SHAREZONE,          /* 10 M_SOOPTS */
 128         0,              KMZ_MALLOC,             /* 11 M_SONAME */
 129         MAXPATHLEN,     KMZ_CREATEZONE,         /* 12 M_NAMEI */
 130         0,              KMZ_MALLOC,             /* 13 M_GPROF */
 131         0,              KMZ_MALLOC,             /* 14 M_IOCTLOPS */
 132         0,              KMZ_MALLOC,             /* 15 M_MAPMEM */
 133         SOS(ucred),     KMZ_CREATEZONE,         /* 16 M_CRED */
 134         SOS(pgrp),      KMZ_CREATEZONE,         /* 17 M_PGRP */
 135         SOS(session),   KMZ_CREATEZONE,         /* 18 M_SESSION */
 136         SOS(iovec),     KMZ_LOOKUPZONE,         /* 19 M_IOV */
 137         SOS(mount),     KMZ_CREATEZONE,         /* 20 M_MOUNT */
 138         0,              KMZ_MALLOC,             /* 21 M_FHANDLE */
 139         SOS(nfsreq),    KMZ_CREATEZONE,         /* 22 M_NFSREQ */
 140         SOS(nfsmount),  KMZ_CREATEZONE,         /* 23 M_NFSMNT */
 141         SOS(nfsnode),   KMZ_CREATEZONE,         /* 24 M_NFSNODE */
 142         SOS(vnode),     KMZ_CREATEZONE,         /* 25 M_VNODE */
 143         SOS(namecache), KMZ_CREATEZONE,         /* 26 M_CACHE */
 144         SOX(dquot),     KMZ_LOOKUPZONE,         /* 27 M_DQUOT */
 145         SOX(ufsmount),  KMZ_LOOKUPZONE,         /* 28 M_UFSMNT */
 146         0,              KMZ_MALLOC,             /* 29 M_CGSUM */
 147         0,              KMZ_MALLOC,             /* 30 M_VMMAP */
 148         0,              KMZ_MALLOC,             /* 31 M_VMMAPENT */
 149         0,              KMZ_MALLOC,             /* 32 M_VMOBJ */
 150         0,              KMZ_MALLOC,             /* 33 M_VMOBJHASH */
 151         0,              KMZ_MALLOC,             /* 34 M_VMPMAP */
 152         0,              KMZ_MALLOC,             /* 35 M_VMPVENT */
 153         0,              KMZ_MALLOC,             /* 36 M_VMPAGER */
 154         0,              KMZ_MALLOC,             /* 37 M_VMPGDATA */
 155         SOS(file),      KMZ_CREATEZONE,         /* 38 M_FILE */
 156         SOS(filedesc),  KMZ_CREATEZONE,         /* 39 M_FILEDESC */
 157         SOX(lockf),     KMZ_CREATEZONE,         /* 40 M_LOCKF */
 158         SOS(proc),      KMZ_CREATEZONE,         /* 41 M_PROC */
 159         SOS(pcred),     KMZ_CREATEZONE,         /* 42 M_SUBPROC */
 160         0,              KMZ_MALLOC,             /* 43 M_SEGMENT */
 161         M_FFSNODE,      KMZ_SHAREZONE,          /* 44 M_LFSNODE */
 162         SOS(inode),     KMZ_CREATEZONE,         /* 45 M_FFSNODE */
 163         M_FFSNODE,      KMZ_SHAREZONE,          /* 46 M_MFSNODE */
 164         SOS(nqlease),   KMZ_CREATEZONE,         /* 47 M_NQLEASE */
 165         SOS(nqm),       KMZ_CREATEZONE,         /* 48 M_NQMHOST */
 166         0,              KMZ_MALLOC,             /* 49 M_NETADDR */
 167         SOX(nfssvc_sock),
 168                         KMZ_CREATEZONE,         /* 50 M_NFSSVC */
 169         SOS(nfsuid),    KMZ_CREATEZONE,         /* 51 M_NFSUID */
 170         SOX(nfsrvcache),
 171                         KMZ_CREATEZONE,         /* 52 M_NFSD */
 172         SOX(ip_moptions),
 173                         KMZ_LOOKUPZONE,         /* 53 M_IPMOPTS */
 174         SOX(in_multi),  KMZ_LOOKUPZONE,         /* 54 M_IPMADDR */
 175         SOX(ether_multi),
 176                         KMZ_LOOKUPZONE,         /* 55 M_IFMADDR */
 177         SOX(mrt),       KMZ_CREATEZONE,         /* 56 M_MRTABLE */
 178         SOX(iso_mnt),   KMZ_LOOKUPZONE,         /* 57 M_ISOFSMNT */
 179         SOS(iso_node),  KMZ_CREATEZONE,         /* 58 M_ISOFSNODE */
 180         SOS(nfsrv_descript),
 181                         KMZ_CREATEZONE,         /* 59 M_NFSRVDESC */
 182         SOS(nfsdmap),   KMZ_CREATEZONE,         /* 60 M_NFSDIROFF */
 183         SOS(fhandle),   KMZ_LOOKUPZONE,         /* 61 M_NFSBIGFH */
 184         0,              KMZ_MALLOC,             /* 62 M_MSDOSFSMNT */
 185         0,              KMZ_MALLOC,             /* 63 M_MSDOSFSFAT */
 186         0,              KMZ_MALLOC,             /* 64 M_MSDOSFSNODE */
 187         SOS(tty),       KMZ_CREATEZONE,         /* 65 M_TTYS */
 188         0,              KMZ_MALLOC,             /* 66 M_EXEC */
 189         0,              KMZ_MALLOC,             /* 67 M_MISCFSMNT */
 190         0,              KMZ_MALLOC,             /* 68 M_MISCFSNODE */
 191         0,              KMZ_MALLOC,             /* 69 M_ADOSFSMNT */
 192         0,              KMZ_MALLOC,             /* 70 M_ADOSFSNODE */
 193         0,              KMZ_MALLOC,             /* 71 M_ANODE */
 194         SOX(buf),       KMZ_CREATEZONE,         /* 72 M_BUFHDR */
 195         (NDFILE * OFILESIZE),
 196                         KMZ_CREATEZONE,         /* 73 M_OFILETABL */
 197         MCLBYTES,       KMZ_CREATEZONE,         /* 74 M_MCLUST */
 198         SOX(hfsmount),  KMZ_LOOKUPZONE,         /* 75 M_HFSMNT */
 199         SOS(cnode),     KMZ_CREATEZONE,         /* 76 M_HFSNODE */
 200         SOS(filefork),  KMZ_CREATEZONE,         /* 77 M_HFSFORK */
 201         SOX(volfs_mntdata),     KMZ_LOOKUPZONE,         /* 78 M_VOLFSMNT */
 202         SOS(volfs_vndata),      KMZ_CREATEZONE,         /* 79 M_VOLFSNODE */
 203         0,              KMZ_MALLOC,             /* 80 M_TEMP */
 204         0,              KMZ_MALLOC,             /* 81 M_SECA */
 205         0,              KMZ_MALLOC,             /* 82 M_DEVFS */
 206         0,              KMZ_MALLOC,             /* 83 M_IPFW */
 207         0,              KMZ_MALLOC,             /* 84 M_UDFNODE */
 208         0,              KMZ_MALLOC,             /* 85 M_UDFMOUNT */
 209         0,              KMZ_MALLOC,             /* 86 M_IP6NDP */
 210         0,              KMZ_MALLOC,             /* 87 M_IP6OPT */
 211         0,              KMZ_MALLOC,             /* 88 M_IP6MISC */
 212         0,              KMZ_MALLOC,             /* 89 M_TSEGQ */
 213         0,              KMZ_MALLOC,             /* 90 M_IGMP */
 214         SOS(journal), KMZ_CREATEZONE,     /* 91 M_JNL_JNL */
 215         SOS(transaction), KMZ_CREATEZONE,     /* 92 M_JNL_TR */
 216         SOS(specinfo), KMZ_CREATEZONE,          /* 93 M_SPECINFO */
 217         SOS(kqueue), KMZ_CREATEZONE,            /* 94 M_KQUEUE */
 218 #undef  SOS
 219 #undef  SOX
 220 };
 221
 222 extern zone_t kalloc_zone(vm_size_t);   /* XXX */
 223
 224 /*
 225  * Initialize the kernel memory allocator
 226  */
 227 void
 228 kmeminit(void)
 229 {
 230         struct kmzones  *kmz;
 231
 232         if ((sizeof(kmzones)/sizeof(kmzones[0])) != (sizeof(memname)/sizeof(memname[0]))) {
 233                 panic("kmeminit: kmzones has %d elements but memname has %d\n",
 234                           (sizeof(kmzones)/sizeof(kmzones[0])), (sizeof(memname)/sizeof(memname[0])));
 235         }
 236
 237         kmz = kmzones;
 238         while (kmz < &kmzones[M_LAST]) {
 239 /* XXX */
 240                 if (kmz->kz_elemsize == -1)
 241                         ;
 242                 else
 243 /* XXX */
 244                 if (kmz->kz_zalloczone == KMZ_CREATEZONE) {
 245                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 246                                                 1024 * 1024, PAGE_SIZE,
 247                                                 memname[kmz - kmzones]);
 248                 }
 249                 else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE)
 250                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 251
 252                 kmz++;
 253         }
 254
 255         kmz = kmzones;
 256         while (kmz < &kmzones[M_LAST]) {
 257 /* XXX */
 258                 if (kmz->kz_elemsize == -1)
 259                         ;
 260                 else
 261 /* XXX */
 262                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 263                         kmz->kz_zalloczone =
 264                                 kmzones[kmz->kz_elemsize].kz_zalloczone;
 265                         kmz->kz_elemsize =
 266                                 kmzones[kmz->kz_elemsize].kz_elemsize;
 267                 }
 268
 269                 kmz++;
 270         }
 271 }
 272
 273 #define MDECL(reqlen)                                   \
 274 union {                                                 \
 275         struct  _mhead hdr;                             \
 276         char    _m[(reqlen) + sizeof (struct _mhead)];  \
 277 }
 278
 279 struct _mhead {
 280         size_t  mlen;
 281         char    dat[0];
 282 };
 283
 284 #define ZEROSIZETOKEN (void *)0xFADEDFAD
 285
 286 void *_MALLOC(
 287         size_t          size,
 288         int             type,
 289         int             flags)
 290 {
 291         MDECL(size)     *mem;
 292         size_t          memsize = sizeof (*mem);
 293
 294         if (type >= M_LAST)
 295                 panic("_malloc TYPE");
 296
 297         /*
 298          * On zero request we do not return zero as that
 299          * could be mistaken for ENOMEM.
 300          */
 301         if (size == 0)
 302                 return (ZEROSIZETOKEN);
 303
 304         if (flags & M_NOWAIT) {
 305                 mem = (void *)kalloc_noblock(memsize);
 306         } else {
 307                 mem = (void *)kalloc(memsize);
 308         }
 309         if (!mem)
 310                 return (0);
 311
 312         mem->hdr.mlen = memsize;
 313
 314         if (flags & M_ZERO)
 315                 bzero(mem->hdr.dat, size);
 316
 317         return  (mem->hdr.dat);
 318 }
 319
 320 void _FREE(
 321         void            *addr,
 322         int             type)
 323 {
 324         struct _mhead   *hdr;
 325
 326         if (type >= M_LAST)
 327                 panic("_free TYPE");
 328
 329         if (addr == (void *)ZEROSIZETOKEN)
 330                 return;
 331         if (!addr)
 332                 return; /* correct (convenient bsd kernel legacy) */
 333
 334         hdr = addr; hdr--;
 335         kfree((vm_offset_t)hdr, hdr->mlen);
 336 }
 337
 338 void *_MALLOC_ZONE(
 339         size_t          size,
 340         int             type,
 341         int             flags)
 342 {
 343         struct kmzones  *kmz;
 344         void            *elem;
 345
 346         if (type >= M_LAST)
 347                 panic("_malloc_zone TYPE");
 348
 349         kmz = &kmzones[type];
 350         if (kmz->kz_zalloczone == KMZ_MALLOC)
 351                 panic("_malloc_zone ZONE");
 352
 353 /* XXX */
 354         if (kmz->kz_elemsize == -1)
 355                 panic("_malloc_zone XXX");
 356 /* XXX */
 357         if (size == kmz->kz_elemsize)
 358                 if (flags & M_NOWAIT) {
 359                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 360                 } else {
 361                         elem = (void *)zalloc(kmz->kz_zalloczone);
 362                 }
 363         else
 364                 if (flags & M_NOWAIT) {
 365                         elem = (void *)kalloc_noblock(size);
 366                 } else {
 367                         elem = (void *)kalloc(size);
 368                 }
 369
 370         return (elem);
 371 }
 372
 373 void _FREE_ZONE(
 374         void            *elem,
 375         size_t          size,
 376         int             type)
 377 {
 378         struct kmzones  *kmz;
 379
 380         if (type >= M_LAST)
 381                 panic("FREE_SIZE");
 382
 383         kmz = &kmzones[type];
 384         if (kmz->kz_zalloczone == KMZ_MALLOC)
 385                 panic("free_zone ZONE");
 386
 387 /* XXX */
 388         if (kmz->kz_elemsize == -1)
 389                 panic("FREE_SIZE XXX");
 390 /* XXX */
 391         if (size == kmz->kz_elemsize)
 392                 zfree(kmz->kz_zalloczone, (vm_offset_t)elem);
 393         else
 394                 kfree((vm_offset_t)elem, size);
 395 }