bsd/kern/kern_malloc.c

   1 /*
   2  * Copyright (c) 2000-2004 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_internal.h>
  75 #include <sys/mount_internal.h>
  76 #include <sys/vnode_internal.h>
  77 #include <sys/ubc_internal.h>
  78 #include <sys/namei.h>
  79 #include <sys/file_internal.h>
  80 #include <sys/filedesc.h>
  81 #include <sys/tty.h>
  82 #include <sys/quota.h>
  83 #include <sys/uio_internal.h>
  84
  85 #include <ufs/ufs/inode.h>
  86
  87 #include <hfs/hfs_cnode.h>
  88 #include <isofs/cd9660/cd9660_node.h>
  89
  90 #include <miscfs/volfs/volfs.h>
  91 #include <miscfs/specfs/specdev.h>
  92
  93 #include <nfs/rpcv2.h>
  94 #include <nfs/nfsproto.h>
  95 #include <nfs/nfsnode.h>
  96 #include <nfs/nfsmount.h>
  97
  98 #include <vfs/vfs_journal.h>
  99
 100 #include <mach/mach_types.h>
 101
 102 #include <kern/zalloc.h>
 103 #include <kern/kalloc.h>
 104
 105 struct kmemstats kmemstats[M_LAST];
 106 char *memname[] = INITKMEMNAMES;
 107
 108 struct kmzones {
 109         size_t          kz_elemsize;
 110         void            *kz_zalloczone;
 111 #define KMZ_CREATEZONE          ((void *)-2)
 112 #define KMZ_LOOKUPZONE          ((void *)-1)
 113 #define KMZ_MALLOC              ((void *)0)
 114 #define KMZ_SHAREZONE           ((void *)1)
 115 } kmzones[M_LAST] = {
 116 #define SOS(sname)      sizeof (struct sname)
 117 #define SOX(sname)      -1
 118         -1,             0,                      /* 0 M_FREE */
 119         MSIZE,          KMZ_CREATEZONE,         /* 1 M_MBUF */
 120         0,              KMZ_MALLOC,             /* 2 M_DEVBUF */
 121         SOS(socket),    KMZ_CREATEZONE,         /* 3 M_SOCKET */
 122         SOS(inpcb),     KMZ_LOOKUPZONE,         /* 4 M_PCB */
 123         M_MBUF,         KMZ_SHAREZONE,          /* 5 M_RTABLE */
 124         M_MBUF,         KMZ_SHAREZONE,          /* 6 M_HTABLE */
 125         M_MBUF,         KMZ_SHAREZONE,          /* 7 M_FTABLE */
 126         SOS(rusage),    KMZ_CREATEZONE,         /* 8 M_ZOMBIE */
 127         0,              KMZ_MALLOC,             /* 9 M_IFADDR */
 128         M_MBUF,         KMZ_SHAREZONE,          /* 10 M_SOOPTS */
 129         0,              KMZ_MALLOC,             /* 11 M_SONAME */
 130         MAXPATHLEN,     KMZ_CREATEZONE,         /* 12 M_NAMEI */
 131         0,              KMZ_MALLOC,             /* 13 M_GPROF */
 132         0,              KMZ_MALLOC,             /* 14 M_IOCTLOPS */
 133         0,              KMZ_MALLOC,             /* 15 M_MAPMEM */
 134         SOS(ucred),     KMZ_CREATEZONE,         /* 16 M_CRED */
 135         SOS(pgrp),      KMZ_CREATEZONE,         /* 17 M_PGRP */
 136         SOS(session),   KMZ_CREATEZONE,         /* 18 M_SESSION */
 137         SOS(iovec_32),  KMZ_LOOKUPZONE,         /* 19 M_IOV32 */
 138         SOS(mount),     KMZ_CREATEZONE,         /* 20 M_MOUNT */
 139         0,              KMZ_MALLOC,             /* 21 M_FHANDLE */
 140         SOS(nfsreq),    KMZ_CREATEZONE,         /* 22 M_NFSREQ */
 141         SOS(nfsmount),  KMZ_CREATEZONE,         /* 23 M_NFSMNT */
 142         SOS(nfsnode),   KMZ_CREATEZONE,         /* 24 M_NFSNODE */
 143         SOS(vnode),     KMZ_CREATEZONE,         /* 25 M_VNODE */
 144         SOS(namecache), KMZ_CREATEZONE,         /* 26 M_CACHE */
 145         SOX(dquot),     KMZ_LOOKUPZONE,         /* 27 M_DQUOT */
 146         SOX(ufsmount),  KMZ_LOOKUPZONE,         /* 28 M_UFSMNT */
 147         0,              KMZ_MALLOC,             /* 29 M_CGSUM */
 148         0,              KMZ_MALLOC,             /* 30 M_VMMAP */
 149         0,              KMZ_MALLOC,             /* 31 M_VMMAPENT */
 150         0,              KMZ_MALLOC,             /* 32 M_VMOBJ */
 151         0,              KMZ_MALLOC,             /* 33 M_VMOBJHASH */
 152         0,              KMZ_MALLOC,             /* 34 M_VMPMAP */
 153         0,              KMZ_MALLOC,             /* 35 M_VMPVENT */
 154         0,              KMZ_MALLOC,             /* 36 M_VMPAGER */
 155         0,              KMZ_MALLOC,             /* 37 M_VMPGDATA */
 156         SOS(fileproc),  KMZ_CREATEZONE,         /* 38 M_FILEPROC */
 157         SOS(filedesc),  KMZ_CREATEZONE,         /* 39 M_FILEDESC */
 158         SOX(lockf),     KMZ_CREATEZONE,         /* 40 M_LOCKF */
 159         SOS(proc),      KMZ_CREATEZONE,         /* 41 M_PROC */
 160         SOS(pstats),    KMZ_CREATEZONE,         /* 42 M_SUBPROC */
 161         0,              KMZ_MALLOC,             /* 43 M_SEGMENT */
 162         M_FFSNODE,      KMZ_SHAREZONE,          /* 44 M_LFSNODE */
 163         SOS(inode),     KMZ_CREATEZONE,         /* 45 M_FFSNODE */
 164         M_FFSNODE,      KMZ_SHAREZONE,          /* 46 M_MFSNODE */
 165         0,              KMZ_MALLOC,             /* 47 M_NQLEASE */
 166         0,              KMZ_MALLOC,             /* 48 M_NQMHOST */
 167         0,              KMZ_MALLOC,             /* 49 M_NETADDR */
 168         SOX(nfssvc_sock),
 169                         KMZ_CREATEZONE,         /* 50 M_NFSSVC */
 170         SOS(nfsuid),    KMZ_CREATEZONE,         /* 51 M_NFSUID */
 171         SOX(nfsrvcache),
 172                         KMZ_CREATEZONE,         /* 52 M_NFSD */
 173         SOX(ip_moptions),
 174                         KMZ_LOOKUPZONE,         /* 53 M_IPMOPTS */
 175         SOX(in_multi),  KMZ_LOOKUPZONE,         /* 54 M_IPMADDR */
 176         SOX(ether_multi),
 177                         KMZ_LOOKUPZONE,         /* 55 M_IFMADDR */
 178         SOX(mrt),       KMZ_CREATEZONE,         /* 56 M_MRTABLE */
 179         SOX(iso_mnt),   KMZ_LOOKUPZONE,         /* 57 M_ISOFSMNT */
 180         SOS(iso_node),  KMZ_CREATEZONE,         /* 58 M_ISOFSNODE */
 181         SOS(nfsrv_descript),
 182                         KMZ_CREATEZONE,         /* 59 M_NFSRVDESC */
 183         SOS(nfsdmap),   KMZ_CREATEZONE,         /* 60 M_NFSDIROFF */
 184         SOS(fhandle),   KMZ_LOOKUPZONE,         /* 61 M_NFSBIGFH */
 185         0,              KMZ_MALLOC,             /* 62 M_MSDOSFSMNT */
 186         0,              KMZ_MALLOC,             /* 63 M_MSDOSFSFAT */
 187         0,              KMZ_MALLOC,             /* 64 M_MSDOSFSNODE */
 188         SOS(tty),       KMZ_CREATEZONE,         /* 65 M_TTYS */
 189         0,              KMZ_MALLOC,             /* 66 M_EXEC */
 190         0,              KMZ_MALLOC,             /* 67 M_MISCFSMNT */
 191         0,              KMZ_MALLOC,             /* 68 M_MISCFSNODE */
 192         0,              KMZ_MALLOC,             /* 69 M_ADOSFSMNT */
 193         0,              KMZ_MALLOC,             /* 70 M_ADOSFSNODE */
 194         0,              KMZ_MALLOC,             /* 71 M_ANODE */
 195         SOX(buf),       KMZ_CREATEZONE,         /* 72 M_BUFHDR */
 196         (NDFILE * OFILESIZE),
 197                         KMZ_CREATEZONE,         /* 73 M_OFILETABL */
 198         MCLBYTES,       KMZ_CREATEZONE,         /* 74 M_MCLUST */
 199         SOX(hfsmount),  KMZ_LOOKUPZONE,         /* 75 M_HFSMNT */
 200         SOS(cnode),     KMZ_CREATEZONE,         /* 76 M_HFSNODE */
 201         SOS(filefork),  KMZ_CREATEZONE,         /* 77 M_HFSFORK */
 202         SOX(volfs_mntdata),     KMZ_LOOKUPZONE,         /* 78 M_VOLFSMNT */
 203         SOS(volfs_vndata),      KMZ_CREATEZONE,         /* 79 M_VOLFSNODE */
 204         0,              KMZ_MALLOC,             /* 80 M_TEMP */
 205         0,              KMZ_MALLOC,             /* 81 M_SECA */
 206         0,              KMZ_MALLOC,             /* 82 M_DEVFS */
 207         0,              KMZ_MALLOC,             /* 83 M_IPFW */
 208         0,              KMZ_MALLOC,             /* 84 M_UDFNODE */
 209         0,              KMZ_MALLOC,             /* 85 M_UDFMOUNT */
 210         0,              KMZ_MALLOC,             /* 86 M_IP6NDP */
 211         0,              KMZ_MALLOC,             /* 87 M_IP6OPT */
 212         0,              KMZ_MALLOC,             /* 88 M_IP6MISC */
 213         0,              KMZ_MALLOC,             /* 89 M_TSEGQ */
 214         0,              KMZ_MALLOC,             /* 90 M_IGMP */
 215         SOS(journal), KMZ_CREATEZONE,     /* 91 M_JNL_JNL */
 216         SOS(transaction), KMZ_CREATEZONE,     /* 92 M_JNL_TR */
 217         SOS(specinfo), KMZ_CREATEZONE,          /* 93 M_SPECINFO */
 218         SOS(kqueue), KMZ_CREATEZONE,            /* 94 M_KQUEUE */
 219         SOS(directoryhint), KMZ_CREATEZONE,     /* 95 M_HFSDIRHINT */
 220         SOS(cl_readahead),  KMZ_CREATEZONE,     /* 96 M_CLRDAHEAD */
 221         SOS(cl_writebehind),KMZ_CREATEZONE,     /* 97 M_CLWRBEHIND */
 222         SOS(iovec_64),  KMZ_LOOKUPZONE,         /* 98 M_IOV64 */
 223         SOS(fileglob),  KMZ_CREATEZONE,         /* 99 M_FILEGLOB */
 224         0,              KMZ_MALLOC,             /* 100 M_KAUTH */
 225         0,              KMZ_MALLOC,             /* 101 M_DUMMYNET */
 226         SOS(unsafe_fsnode),KMZ_CREATEZONE,      /* 102 M_UNSAFEFS */
 227 #undef  SOS
 228 #undef  SOX
 229 };
 230
 231 extern zone_t kalloc_zone(vm_size_t);   /* XXX */
 232
 233 /*
 234  * Initialize the kernel memory allocator
 235  */
 236 void
 237 kmeminit(void)
 238 {
 239         struct kmzones  *kmz;
 240
 241         if ((sizeof(kmzones)/sizeof(kmzones[0])) != (sizeof(memname)/sizeof(memname[0]))) {
 242                 panic("kmeminit: kmzones has %d elements but memname has %d\n",
 243                           (sizeof(kmzones)/sizeof(kmzones[0])), (sizeof(memname)/sizeof(memname[0])));
 244         }
 245
 246         kmz = kmzones;
 247         while (kmz < &kmzones[M_LAST]) {
 248 /* XXX */
 249                 if (kmz->kz_elemsize == -1)
 250                         ;
 251                 else
 252 /* XXX */
 253                 if (kmz->kz_zalloczone == KMZ_CREATEZONE) {
 254                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 255                                                 1024 * 1024, PAGE_SIZE,
 256                                                 memname[kmz - kmzones]);
 257                 }
 258                 else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE)
 259                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 260
 261                 kmz++;
 262         }
 263
 264         kmz = kmzones;
 265         while (kmz < &kmzones[M_LAST]) {
 266 /* XXX */
 267                 if (kmz->kz_elemsize == -1)
 268                         ;
 269                 else
 270 /* XXX */
 271                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 272                         kmz->kz_zalloczone =
 273                                 kmzones[kmz->kz_elemsize].kz_zalloczone;
 274                         kmz->kz_elemsize =
 275                                 kmzones[kmz->kz_elemsize].kz_elemsize;
 276                 }
 277
 278                 kmz++;
 279         }
 280 }
 281
 282 #define MDECL(reqlen)                                   \
 283 union {                                                 \
 284         struct  _mhead hdr;                             \
 285         char    _m[(reqlen) + sizeof (struct _mhead)];  \
 286 }
 287
 288 struct _mhead {
 289         size_t  mlen;
 290         char    dat[0];
 291 };
 292
 293 #define ZEROSIZETOKEN (void *)0xFADEDFAD
 294
 295 void *
 296 _MALLOC(
 297         size_t          size,
 298         int             type,
 299         int             flags)
 300 {
 301         MDECL(size)     *mem;
 302         size_t          memsize = sizeof (*mem);
 303
 304         if (type >= M_LAST)
 305                 panic("_malloc TYPE");
 306
 307         /*
 308          * On zero request we do not return zero as that
 309          * could be mistaken for ENOMEM.
 310          */
 311         if (size == 0)
 312                 return (ZEROSIZETOKEN);
 313
 314         if (flags & M_NOWAIT) {
 315                 mem = (void *)kalloc_noblock(memsize);
 316         } else {
 317                 mem = (void *)kalloc(memsize);
 318         }
 319         if (!mem)
 320                 return (0);
 321
 322         mem->hdr.mlen = memsize;
 323
 324         if (flags & M_ZERO)
 325                 bzero(mem->hdr.dat, size);
 326
 327         return  (mem->hdr.dat);
 328 }
 329
 330 void
 331 _FREE(
 332         void            *addr,
 333         int             type)
 334 {
 335         struct _mhead   *hdr;
 336
 337         if (type >= M_LAST)
 338                 panic("_free TYPE");
 339
 340         if (addr == (void *)ZEROSIZETOKEN)
 341                 return;
 342         if (!addr)
 343                 return; /* correct (convenient bsd kernel legacy) */
 344
 345         hdr = addr; hdr--;
 346         kfree(hdr, hdr->mlen);
 347 }
 348
 349 void *
 350 _MALLOC_ZONE(
 351         size_t          size,
 352         int             type,
 353         int             flags)
 354 {
 355         struct kmzones  *kmz;
 356         void            *elem;
 357
 358         if (type >= M_LAST)
 359                 panic("_malloc_zone TYPE");
 360
 361         kmz = &kmzones[type];
 362         if (kmz->kz_zalloczone == KMZ_MALLOC)
 363                 panic("_malloc_zone ZONE: type = %d", type);
 364
 365 /* XXX */
 366         if (kmz->kz_elemsize == -1)
 367                 panic("_malloc_zone XXX");
 368 /* XXX */
 369         if (size == kmz->kz_elemsize)
 370                 if (flags & M_NOWAIT) {
 371                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 372                 } else {
 373                         elem = (void *)zalloc(kmz->kz_zalloczone);
 374                 }
 375         else
 376                 if (flags & M_NOWAIT) {
 377                         elem = (void *)kalloc_noblock(size);
 378                 } else {
 379                         elem = (void *)kalloc(size);
 380                 }
 381
 382         return (elem);
 383 }
 384
 385 void
 386 _FREE_ZONE(
 387         void            *elem,
 388         size_t          size,
 389         int             type)
 390 {
 391         struct kmzones  *kmz;
 392
 393         if (type >= M_LAST)
 394                 panic("FREE_SIZE");
 395
 396         kmz = &kmzones[type];
 397         if (kmz->kz_zalloczone == KMZ_MALLOC)
 398                 panic("free_zone ZONE");
 399
 400 /* XXX */
 401         if (kmz->kz_elemsize == -1)
 402                 panic("FREE_SIZE XXX");
 403 /* XXX */
 404         if (size == kmz->kz_elemsize)
 405                 zfree(kmz->kz_zalloczone, elem);
 406         else
 407                 kfree(elem, size);
 408 }