bsd/kern/kern_malloc.c

   1 /*
   2  * Copyright (c) 2000 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/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
  90 #include <nfs/rpcv2.h>
  91 #include <nfs/nfsproto.h>
  92 #include <nfs/nfsnode.h>
  93 #include <nfs/nfsmount.h>
  94 #include <nfs/nqnfs.h>
  95
  96 #include <vfs/vfs_journal.h>
  97
  98 #include <mach/mach_types.h>
  99
 100 #include <kern/zalloc.h>
 101 #include <kern/kalloc.h>
 102
 103 struct kmemstats kmemstats[M_LAST];
 104 char *memname[] = INITKMEMNAMES;
 105
 106 struct kmzones {
 107         size_t          kz_elemsize;
 108         void            *kz_zalloczone;
 109 #define KMZ_CREATEZONE          ((void *)-2)
 110 #define KMZ_LOOKUPZONE          ((void *)-1)
 111 #define KMZ_MALLOC              ((void *)0)
 112 #define KMZ_SHAREZONE           ((void *)1)
 113 } kmzones[M_LAST] = {
 114 #define SOS(sname)      sizeof (struct sname)
 115 #define SOX(sname)      -1
 116         -1,             0,                      /* 0 M_FREE */
 117         MSIZE,          KMZ_CREATEZONE,         /* 1 M_MBUF */
 118         0,              KMZ_MALLOC,             /* 2 M_DEVBUF */
 119         SOS(socket),    KMZ_CREATEZONE,         /* 3 M_SOCKET */
 120         SOS(inpcb),     KMZ_LOOKUPZONE,         /* 4 M_PCB */
 121         M_MBUF,         KMZ_SHAREZONE,          /* 5 M_RTABLE */
 122         M_MBUF,         KMZ_SHAREZONE,          /* 6 M_HTABLE */
 123         M_MBUF,         KMZ_SHAREZONE,          /* 7 M_FTABLE */
 124         SOS(rusage),    KMZ_CREATEZONE,         /* 8 M_ZOMBIE */
 125         0,              KMZ_MALLOC,             /* 9 M_IFADDR */
 126         M_MBUF,         KMZ_SHAREZONE,          /* 10 M_SOOPTS */
 127         0,              KMZ_MALLOC,             /* 11 M_SONAME */
 128         MAXPATHLEN,     KMZ_CREATEZONE,         /* 12 M_NAMEI */
 129         0,              KMZ_MALLOC,             /* 13 M_GPROF */
 130         0,              KMZ_MALLOC,             /* 14 M_IOCTLOPS */
 131         0,              KMZ_MALLOC,             /* 15 M_MAPMEM */
 132         SOS(ucred),     KMZ_CREATEZONE,         /* 16 M_CRED */
 133         SOS(pgrp),      KMZ_CREATEZONE,         /* 17 M_PGRP */
 134         SOS(session),   KMZ_CREATEZONE,         /* 18 M_SESSION */
 135         SOS(iovec),     KMZ_LOOKUPZONE,         /* 19 M_IOV */
 136         SOS(mount),     KMZ_CREATEZONE,         /* 20 M_MOUNT */
 137         0,              KMZ_MALLOC,             /* 21 M_FHANDLE */
 138         SOS(nfsreq),    KMZ_CREATEZONE,         /* 22 M_NFSREQ */
 139         SOS(nfsmount),  KMZ_CREATEZONE,         /* 23 M_NFSMNT */
 140         SOS(nfsnode),   KMZ_CREATEZONE,         /* 24 M_NFSNODE */
 141         SOS(vnode),     KMZ_CREATEZONE,         /* 25 M_VNODE */
 142         SOS(namecache), KMZ_CREATEZONE,         /* 26 M_CACHE */
 143         SOX(dquot),     KMZ_LOOKUPZONE,         /* 27 M_DQUOT */
 144         SOX(ufsmount),  KMZ_LOOKUPZONE,         /* 28 M_UFSMNT */
 145         0,              KMZ_MALLOC,             /* 29 M_CGSUM */
 146         0,              KMZ_MALLOC,             /* 30 M_VMMAP */
 147         0,              KMZ_MALLOC,             /* 31 M_VMMAPENT */
 148         0,              KMZ_MALLOC,             /* 32 M_VMOBJ */
 149         0,              KMZ_MALLOC,             /* 33 M_VMOBJHASH */
 150         0,              KMZ_MALLOC,             /* 34 M_VMPMAP */
 151         0,              KMZ_MALLOC,             /* 35 M_VMPVENT */
 152         0,              KMZ_MALLOC,             /* 36 M_VMPAGER */
 153         0,              KMZ_MALLOC,             /* 37 M_VMPGDATA */
 154         SOS(file),      KMZ_CREATEZONE,         /* 38 M_FILE */
 155         SOS(filedesc),  KMZ_CREATEZONE,         /* 39 M_FILEDESC */
 156         SOX(lockf),     KMZ_CREATEZONE,         /* 40 M_LOCKF */
 157         SOS(proc),      KMZ_CREATEZONE,         /* 41 M_PROC */
 158         SOS(pcred),     KMZ_CREATEZONE,         /* 42 M_SUBPROC */
 159         0,              KMZ_MALLOC,             /* 43 M_SEGMENT */
 160         M_FFSNODE,      KMZ_SHAREZONE,          /* 44 M_LFSNODE */
 161         SOS(inode),     KMZ_CREATEZONE,         /* 45 M_FFSNODE */
 162         M_FFSNODE,      KMZ_SHAREZONE,          /* 46 M_MFSNODE */
 163         SOS(nqlease),   KMZ_CREATEZONE,         /* 47 M_NQLEASE */
 164         SOS(nqm),       KMZ_CREATEZONE,         /* 48 M_NQMHOST */
 165         0,              KMZ_MALLOC,             /* 49 M_NETADDR */
 166         SOX(nfssvc_sock),
 167                         KMZ_CREATEZONE,         /* 50 M_NFSSVC */
 168         SOS(nfsuid),    KMZ_CREATEZONE,         /* 51 M_NFSUID */
 169         SOX(nfsrvcache),
 170                         KMZ_CREATEZONE,         /* 52 M_NFSD */
 171         SOX(ip_moptions),
 172                         KMZ_LOOKUPZONE,         /* 53 M_IPMOPTS */
 173         SOX(in_multi),  KMZ_LOOKUPZONE,         /* 54 M_IPMADDR */
 174         SOX(ether_multi),
 175                         KMZ_LOOKUPZONE,         /* 55 M_IFMADDR */
 176         SOX(mrt),       KMZ_CREATEZONE,         /* 56 M_MRTABLE */
 177         SOX(iso_mnt),   KMZ_LOOKUPZONE,         /* 57 M_ISOFSMNT */
 178         SOS(iso_node),  KMZ_CREATEZONE,         /* 58 M_ISOFSNODE */
 179         SOS(nfsrv_descript),
 180                         KMZ_CREATEZONE,         /* 59 M_NFSRVDESC */
 181         SOS(nfsdmap),   KMZ_CREATEZONE,         /* 60 M_NFSDIROFF */
 182         SOS(fhandle),   KMZ_LOOKUPZONE,         /* 61 M_NFSBIGFH */
 183         0,              KMZ_MALLOC,             /* 62 M_MSDOSFSMNT */
 184         0,              KMZ_MALLOC,             /* 63 M_MSDOSFSFAT */
 185         0,              KMZ_MALLOC,             /* 64 M_MSDOSFSNODE */
 186         SOS(tty),       KMZ_CREATEZONE,         /* 65 M_TTYS */
 187         0,              KMZ_MALLOC,             /* 66 M_EXEC */
 188         0,              KMZ_MALLOC,             /* 67 M_MISCFSMNT */
 189         0,              KMZ_MALLOC,             /* 68 M_MISCFSNODE */
 190         0,              KMZ_MALLOC,             /* 69 M_ADOSFSMNT */
 191         0,              KMZ_MALLOC,             /* 70 M_ADOSFSNODE */
 192         0,              KMZ_MALLOC,             /* 71 M_ANODE */
 193         SOX(buf),       KMZ_CREATEZONE,         /* 72 M_BUFHDR */
 194         (NDFILE * OFILESIZE),
 195                         KMZ_CREATEZONE,         /* 73 M_OFILETABL */
 196         MCLBYTES,       KMZ_CREATEZONE,         /* 74 M_MCLUST */
 197         SOX(hfsmount),  KMZ_LOOKUPZONE,         /* 75 M_HFSMNT */
 198         SOS(cnode),     KMZ_CREATEZONE,         /* 76 M_HFSNODE */
 199         SOS(filefork),  KMZ_CREATEZONE,         /* 77 M_HFSFORK */
 200         SOX(volfs_mntdata),     KMZ_LOOKUPZONE,         /* 78 M_VOLFSMNT */
 201         SOS(volfs_vndata),      KMZ_CREATEZONE,         /* 79 M_VOLFSNODE */
 202         0,              KMZ_MALLOC,             /* 80 M_TEMP */
 203         0,              KMZ_MALLOC,             /* 81 M_SECA */
 204         0,              KMZ_MALLOC,             /* 82 M_DEVFS */
 205         0,              KMZ_MALLOC,             /* 83 M_IPFW */
 206         0,              KMZ_MALLOC,             /* 84 M_UDFNODE */
 207         0,              KMZ_MALLOC,             /* 85 M_UDFMOUNT */
 208         0,              KMZ_MALLOC,             /* 86 M_IP6NDP */
 209         0,              KMZ_MALLOC,             /* 87 M_IP6OPT */
 210         0,              KMZ_MALLOC,             /* 88 M_IP6MISC */
 211         0,              KMZ_MALLOC,             /* 89 M_TSEGQ */
 212         0,              KMZ_MALLOC,             /* 90 M_IGMP */
 213         SOS(journal),     KMZ_CREATEZONE,     /* 91 M_JNL_JNL */
 214         SOS(transaction), KMZ_CREATEZONE,     /* 92 M_JNL_TR */
 215 #undef  SOS
 216 #undef  SOX
 217 };
 218
 219
 220 /*
 221  * Initialize the kernel memory allocator
 222  */
 223 void
 224 kmeminit(void)
 225 {
 226         struct kmzones  *kmz;
 227
 228         if ((sizeof(kmzones)/sizeof(kmzones[0])) != (sizeof(memname)/sizeof(memname[0]))) {
 229                 panic("kmeminit: kmzones has %d elements but memname has %d\n",
 230                           (sizeof(kmzones)/sizeof(kmzones[0])), (sizeof(memname)/sizeof(memname[0])));
 231         }
 232
 233         kmz = kmzones;
 234         while (kmz < &kmzones[M_LAST]) {
 235 /* XXX */
 236                 if (kmz->kz_elemsize == -1)
 237                         ;
 238                 else
 239 /* XXX */
 240                 if (kmz->kz_zalloczone == KMZ_CREATEZONE) {
 241                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 242                                                 1024 * 1024, PAGE_SIZE,
 243                                                 memname[kmz - kmzones]);
 244                 }
 245                 else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE)
 246                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 247
 248                 kmz++;
 249         }
 250
 251         kmz = kmzones;
 252         while (kmz < &kmzones[M_LAST]) {
 253 /* XXX */
 254                 if (kmz->kz_elemsize == -1)
 255                         ;
 256                 else
 257 /* XXX */
 258                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 259                         kmz->kz_zalloczone =
 260                                 kmzones[kmz->kz_elemsize].kz_zalloczone;
 261                         kmz->kz_elemsize =
 262                                 kmzones[kmz->kz_elemsize].kz_elemsize;
 263                 }
 264
 265                 kmz++;
 266         }
 267 }
 268
 269 #define MDECL(reqlen)                                   \
 270 union {                                                 \
 271         struct  _mhead hdr;                             \
 272         char    _m[(reqlen) + sizeof (struct _mhead)];  \
 273 }
 274
 275 struct _mhead {
 276         size_t  mlen;
 277         char    dat[0];
 278 };
 279
 280 #define ZEROSIZETOKEN 0xFADEDFAD
 281
 282 void *_MALLOC(
 283         size_t          size,
 284         int             type,
 285         int             flags)
 286 {
 287         MDECL(size)     *mem;
 288         size_t          memsize = sizeof (*mem);
 289
 290         if (type >= M_LAST)
 291                 panic("_malloc TYPE");
 292
 293         /*
 294          * On zero request we do not return zero as that
 295          * could be mistaken for ENOMEM.
 296          */
 297         if (size == 0)
 298                 return (ZEROSIZETOKEN);
 299
 300         if (flags & M_NOWAIT) {
 301                 mem = (void *)kalloc_noblock(memsize);
 302         } else {
 303                 mem = (void *)kalloc(memsize);
 304         }
 305         if (!mem)
 306                 return (0);
 307
 308         mem->hdr.mlen = memsize;
 309
 310         return  (mem->hdr.dat);
 311 }
 312
 313 void _FREE(
 314         void            *addr,
 315         int             type)
 316 {
 317         struct _mhead   *hdr;
 318
 319         if (type >= M_LAST)
 320                 panic("_free TYPE");
 321
 322         if (addr == (void *)ZEROSIZETOKEN)
 323                 return;
 324         if (!addr)
 325                 return; /* correct (convenient bsd kernel legacy) */
 326
 327         hdr = addr; hdr--;
 328         kfree((vm_offset_t)hdr, hdr->mlen);
 329 }
 330
 331 void *_MALLOC_ZONE(
 332         size_t          size,
 333         int             type,
 334         int             flags)
 335 {
 336         struct kmzones  *kmz;
 337         void            *elem;
 338
 339         if (type >= M_LAST)
 340                 panic("_malloc_zone TYPE");
 341
 342         kmz = &kmzones[type];
 343         if (kmz->kz_zalloczone == KMZ_MALLOC)
 344                 panic("_malloc_zone ZONE");
 345
 346 /* XXX */
 347         if (kmz->kz_elemsize == -1)
 348                 panic("_malloc_zone XXX");
 349 /* XXX */
 350         if (size == kmz->kz_elemsize)
 351                 if (flags & M_NOWAIT) {
 352                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 353                 } else {
 354                         elem = (void *)zalloc(kmz->kz_zalloczone);
 355                 }
 356         else
 357                 if (flags & M_NOWAIT) {
 358                         elem = (void *)kalloc_noblock(size);
 359                 } else {
 360                         elem = (void *)kalloc(size);
 361                 }
 362
 363         return (elem);
 364 }
 365
 366 void _FREE_ZONE(
 367         void            *elem,
 368         size_t          size,
 369         int             type)
 370 {
 371         struct kmzones  *kmz;
 372
 373         if (type >= M_LAST)
 374                 panic("FREE_SIZE");
 375
 376         kmz = &kmzones[type];
 377         if (kmz->kz_zalloczone == KMZ_MALLOC)
 378                 panic("free_zone ZONE");
 379
 380 /* XXX */
 381         if (kmz->kz_elemsize == -1)
 382                 panic("FREE_SIZE XXX");
 383 /* XXX */
 384         if (size == kmz->kz_elemsize)
 385                 zfree(kmz->kz_zalloczone, (vm_offset_t)elem);
 386         else
 387                 kfree((vm_offset_t)elem, size);
 388 }