bsd/kern/kern_malloc.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1987, 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)kern_malloc.c       8.4 (Berkeley) 5/20/95
  62  */
  63
  64 #include <sys/param.h>
  65 #include <sys/malloc.h>
  66
  67 #include <sys/socket.h>
  68 #include <sys/socketvar.h>
  69
  70 #include <net/route.h>
  71
  72 #include <netinet/in.h>
  73 #include <netinet/in_systm.h>
  74 #include <netinet/ip.h>
  75 #include <netinet/in_pcb.h>
  76
  77 #include <sys/event.h>
  78 #include <sys/eventvar.h>
  79
  80 #include <sys/proc_internal.h>
  81 #include <sys/mount_internal.h>
  82 #include <sys/vnode_internal.h>
  83 #include <sys/ubc_internal.h>
  84 #include <sys/namei.h>
  85 #include <sys/file_internal.h>
  86 #include <sys/filedesc.h>
  87 #include <sys/tty.h>
  88 #include <sys/quota.h>
  89 #include <sys/uio_internal.h>
  90
  91 #include <ufs/ufs/inode.h>
  92
  93 #include <hfs/hfs_cnode.h>
  94 #include <isofs/cd9660/cd9660_node.h>
  95
  96 #include <miscfs/volfs/volfs.h>
  97 #include <miscfs/specfs/specdev.h>
  98
  99 #include <nfs/rpcv2.h>
 100 #include <nfs/nfsproto.h>
 101 #include <nfs/nfsnode.h>
 102 #include <nfs/nfsmount.h>
 103
 104 #include <vfs/vfs_journal.h>
 105
 106 #include <mach/mach_types.h>
 107
 108 #include <kern/zalloc.h>
 109 #include <kern/kalloc.h>
 110
 111 struct kmemstats kmemstats[M_LAST];
 112 char *memname[] = INITKMEMNAMES;
 113
 114 struct kmzones {
 115         size_t          kz_elemsize;
 116         void            *kz_zalloczone;
 117 #define KMZ_CREATEZONE          ((void *)-2)
 118 #define KMZ_LOOKUPZONE          ((void *)-1)
 119 #define KMZ_MALLOC              ((void *)0)
 120 #define KMZ_SHAREZONE           ((void *)1)
 121 } kmzones[M_LAST] = {
 122 #define SOS(sname)      sizeof (struct sname)
 123 #define SOX(sname)      -1
 124         -1,             0,                      /* 0 M_FREE */
 125         MSIZE,          KMZ_CREATEZONE,         /* 1 M_MBUF */
 126         0,              KMZ_MALLOC,             /* 2 M_DEVBUF */
 127         SOS(socket),    KMZ_CREATEZONE,         /* 3 M_SOCKET */
 128         SOS(inpcb),     KMZ_LOOKUPZONE,         /* 4 M_PCB */
 129         M_MBUF,         KMZ_SHAREZONE,          /* 5 M_RTABLE */
 130         M_MBUF,         KMZ_SHAREZONE,          /* 6 M_HTABLE */
 131         M_MBUF,         KMZ_SHAREZONE,          /* 7 M_FTABLE */
 132         SOS(rusage),    KMZ_CREATEZONE,         /* 8 M_ZOMBIE */
 133         0,              KMZ_MALLOC,             /* 9 M_IFADDR */
 134         M_MBUF,         KMZ_SHAREZONE,          /* 10 M_SOOPTS */
 135         0,              KMZ_MALLOC,             /* 11 M_SONAME */
 136         MAXPATHLEN,     KMZ_CREATEZONE,         /* 12 M_NAMEI */
 137         0,              KMZ_MALLOC,             /* 13 M_GPROF */
 138         0,              KMZ_MALLOC,             /* 14 M_IOCTLOPS */
 139         0,              KMZ_MALLOC,             /* 15 M_MAPMEM */
 140         SOS(ucred),     KMZ_CREATEZONE,         /* 16 M_CRED */
 141         SOS(pgrp),      KMZ_CREATEZONE,         /* 17 M_PGRP */
 142         SOS(session),   KMZ_CREATEZONE,         /* 18 M_SESSION */
 143         SOS(iovec_32),  KMZ_LOOKUPZONE,         /* 19 M_IOV32 */
 144         SOS(mount),     KMZ_CREATEZONE,         /* 20 M_MOUNT */
 145         0,              KMZ_MALLOC,             /* 21 M_FHANDLE */
 146         SOS(nfsreq),    KMZ_CREATEZONE,         /* 22 M_NFSREQ */
 147         SOS(nfsmount),  KMZ_CREATEZONE,         /* 23 M_NFSMNT */
 148         SOS(nfsnode),   KMZ_CREATEZONE,         /* 24 M_NFSNODE */
 149         SOS(vnode),     KMZ_CREATEZONE,         /* 25 M_VNODE */
 150         SOS(namecache), KMZ_CREATEZONE,         /* 26 M_CACHE */
 151         SOX(dquot),     KMZ_LOOKUPZONE,         /* 27 M_DQUOT */
 152         SOX(ufsmount),  KMZ_LOOKUPZONE,         /* 28 M_UFSMNT */
 153         0,              KMZ_MALLOC,             /* 29 M_CGSUM */
 154         0,              KMZ_MALLOC,             /* 30 M_VMMAP */
 155         0,              KMZ_MALLOC,             /* 31 M_VMMAPENT */
 156         0,              KMZ_MALLOC,             /* 32 M_VMOBJ */
 157         0,              KMZ_MALLOC,             /* 33 M_VMOBJHASH */
 158         0,              KMZ_MALLOC,             /* 34 M_VMPMAP */
 159         0,              KMZ_MALLOC,             /* 35 M_VMPVENT */
 160         0,              KMZ_MALLOC,             /* 36 M_VMPAGER */
 161         0,              KMZ_MALLOC,             /* 37 M_VMPGDATA */
 162         SOS(fileproc),  KMZ_CREATEZONE,         /* 38 M_FILEPROC */
 163         SOS(filedesc),  KMZ_CREATEZONE,         /* 39 M_FILEDESC */
 164         SOX(lockf),     KMZ_CREATEZONE,         /* 40 M_LOCKF */
 165         SOS(proc),      KMZ_CREATEZONE,         /* 41 M_PROC */
 166         SOS(pstats),    KMZ_CREATEZONE,         /* 42 M_SUBPROC */
 167         0,              KMZ_MALLOC,             /* 43 M_SEGMENT */
 168         M_FFSNODE,      KMZ_SHAREZONE,          /* 44 M_LFSNODE */
 169         SOS(inode),     KMZ_CREATEZONE,         /* 45 M_FFSNODE */
 170         M_FFSNODE,      KMZ_SHAREZONE,          /* 46 M_MFSNODE */
 171         0,              KMZ_MALLOC,             /* 47 M_NQLEASE */
 172         0,              KMZ_MALLOC,             /* 48 M_NQMHOST */
 173         0,              KMZ_MALLOC,             /* 49 M_NETADDR */
 174         SOX(nfssvc_sock),
 175                         KMZ_CREATEZONE,         /* 50 M_NFSSVC */
 176         SOS(nfsuid),    KMZ_CREATEZONE,         /* 51 M_NFSUID */
 177         SOX(nfsrvcache),
 178                         KMZ_CREATEZONE,         /* 52 M_NFSD */
 179         SOX(ip_moptions),
 180                         KMZ_LOOKUPZONE,         /* 53 M_IPMOPTS */
 181         SOX(in_multi),  KMZ_LOOKUPZONE,         /* 54 M_IPMADDR */
 182         SOX(ether_multi),
 183                         KMZ_LOOKUPZONE,         /* 55 M_IFMADDR */
 184         SOX(mrt),       KMZ_CREATEZONE,         /* 56 M_MRTABLE */
 185         SOX(iso_mnt),   KMZ_LOOKUPZONE,         /* 57 M_ISOFSMNT */
 186         SOS(iso_node),  KMZ_CREATEZONE,         /* 58 M_ISOFSNODE */
 187         SOS(nfsrv_descript),
 188                         KMZ_CREATEZONE,         /* 59 M_NFSRVDESC */
 189         SOS(nfsdmap),   KMZ_CREATEZONE,         /* 60 M_NFSDIROFF */
 190         SOS(fhandle),   KMZ_LOOKUPZONE,         /* 61 M_NFSBIGFH */
 191         0,              KMZ_MALLOC,             /* 62 M_MSDOSFSMNT */
 192         0,              KMZ_MALLOC,             /* 63 M_MSDOSFSFAT */
 193         0,              KMZ_MALLOC,             /* 64 M_MSDOSFSNODE */
 194         SOS(tty),       KMZ_CREATEZONE,         /* 65 M_TTYS */
 195         0,              KMZ_MALLOC,             /* 66 M_EXEC */
 196         0,              KMZ_MALLOC,             /* 67 M_MISCFSMNT */
 197         0,              KMZ_MALLOC,             /* 68 M_MISCFSNODE */
 198         0,              KMZ_MALLOC,             /* 69 M_ADOSFSMNT */
 199         0,              KMZ_MALLOC,             /* 70 M_ADOSFSNODE */
 200         0,              KMZ_MALLOC,             /* 71 M_ANODE */
 201         SOX(buf),       KMZ_CREATEZONE,         /* 72 M_BUFHDR */
 202         (NDFILE * OFILESIZE),
 203                         KMZ_CREATEZONE,         /* 73 M_OFILETABL */
 204         MCLBYTES,       KMZ_CREATEZONE,         /* 74 M_MCLUST */
 205         SOX(hfsmount),  KMZ_LOOKUPZONE,         /* 75 M_HFSMNT */
 206         SOS(cnode),     KMZ_CREATEZONE,         /* 76 M_HFSNODE */
 207         SOS(filefork),  KMZ_CREATEZONE,         /* 77 M_HFSFORK */
 208         SOX(volfs_mntdata),     KMZ_LOOKUPZONE,         /* 78 M_VOLFSMNT */
 209         SOS(volfs_vndata),      KMZ_CREATEZONE,         /* 79 M_VOLFSNODE */
 210         0,              KMZ_MALLOC,             /* 80 M_TEMP */
 211         0,              KMZ_MALLOC,             /* 81 M_SECA */
 212         0,              KMZ_MALLOC,             /* 82 M_DEVFS */
 213         0,              KMZ_MALLOC,             /* 83 M_IPFW */
 214         0,              KMZ_MALLOC,             /* 84 M_UDFNODE */
 215         0,              KMZ_MALLOC,             /* 85 M_UDFMOUNT */
 216         0,              KMZ_MALLOC,             /* 86 M_IP6NDP */
 217         0,              KMZ_MALLOC,             /* 87 M_IP6OPT */
 218         0,              KMZ_MALLOC,             /* 88 M_IP6MISC */
 219         0,              KMZ_MALLOC,             /* 89 M_TSEGQ */
 220         0,              KMZ_MALLOC,             /* 90 M_IGMP */
 221         SOS(journal), KMZ_CREATEZONE,     /* 91 M_JNL_JNL */
 222         SOS(transaction), KMZ_CREATEZONE,     /* 92 M_JNL_TR */
 223         SOS(specinfo), KMZ_CREATEZONE,          /* 93 M_SPECINFO */
 224         SOS(kqueue), KMZ_CREATEZONE,            /* 94 M_KQUEUE */
 225         SOS(directoryhint), KMZ_CREATEZONE,     /* 95 M_HFSDIRHINT */
 226         SOS(cl_readahead),  KMZ_CREATEZONE,     /* 96 M_CLRDAHEAD */
 227         SOS(cl_writebehind),KMZ_CREATEZONE,     /* 97 M_CLWRBEHIND */
 228         SOS(iovec_64),  KMZ_LOOKUPZONE,         /* 98 M_IOV64 */
 229         SOS(fileglob),  KMZ_CREATEZONE,         /* 99 M_FILEGLOB */
 230         0,              KMZ_MALLOC,             /* 100 M_KAUTH */
 231         0,              KMZ_MALLOC,             /* 101 M_DUMMYNET */
 232         SOS(unsafe_fsnode),KMZ_CREATEZONE,      /* 102 M_UNSAFEFS */
 233 #undef  SOS
 234 #undef  SOX
 235 };
 236
 237 extern zone_t kalloc_zone(vm_size_t);   /* XXX */
 238
 239 /*
 240  * Initialize the kernel memory allocator
 241  */
 242 void
 243 kmeminit(void)
 244 {
 245         struct kmzones  *kmz;
 246
 247         if ((sizeof(kmzones)/sizeof(kmzones[0])) != (sizeof(memname)/sizeof(memname[0]))) {
 248                 panic("kmeminit: kmzones has %d elements but memname has %d\n",
 249                           (sizeof(kmzones)/sizeof(kmzones[0])), (sizeof(memname)/sizeof(memname[0])));
 250         }
 251
 252         kmz = kmzones;
 253         while (kmz < &kmzones[M_LAST]) {
 254 /* XXX */
 255                 if (kmz->kz_elemsize == -1)
 256                         ;
 257                 else
 258 /* XXX */
 259                 if (kmz->kz_zalloczone == KMZ_CREATEZONE) {
 260                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 261                                                 1024 * 1024, PAGE_SIZE,
 262                                                 memname[kmz - kmzones]);
 263                 }
 264                 else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE)
 265                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 266
 267                 kmz++;
 268         }
 269
 270         kmz = kmzones;
 271         while (kmz < &kmzones[M_LAST]) {
 272 /* XXX */
 273                 if (kmz->kz_elemsize == -1)
 274                         ;
 275                 else
 276 /* XXX */
 277                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 278                         kmz->kz_zalloczone =
 279                                 kmzones[kmz->kz_elemsize].kz_zalloczone;
 280                         kmz->kz_elemsize =
 281                                 kmzones[kmz->kz_elemsize].kz_elemsize;
 282                 }
 283
 284                 kmz++;
 285         }
 286 }
 287
 288 #define MDECL(reqlen)                                   \
 289 union {                                                 \
 290         struct  _mhead hdr;                             \
 291         char    _m[(reqlen) + sizeof (struct _mhead)];  \
 292 }
 293
 294 struct _mhead {
 295         size_t  mlen;
 296         char    dat[0];
 297 };
 298
 299 #define ZEROSIZETOKEN (void *)0xFADEDFAD
 300
 301 void *
 302 _MALLOC(
 303         size_t          size,
 304         int             type,
 305         int             flags)
 306 {
 307         MDECL(size)     *mem;
 308         size_t          memsize = sizeof (*mem);
 309
 310         if (type >= M_LAST)
 311                 panic("_malloc TYPE");
 312
 313         /*
 314          * On zero request we do not return zero as that
 315          * could be mistaken for ENOMEM.
 316          */
 317         if (size == 0)
 318                 return (ZEROSIZETOKEN);
 319
 320         if (flags & M_NOWAIT) {
 321                 mem = (void *)kalloc_noblock(memsize);
 322         } else {
 323                 mem = (void *)kalloc(memsize);
 324         }
 325         if (!mem)
 326                 return (0);
 327
 328         mem->hdr.mlen = memsize;
 329
 330         if (flags & M_ZERO)
 331                 bzero(mem->hdr.dat, size);
 332
 333         return  (mem->hdr.dat);
 334 }
 335
 336 void
 337 _FREE(
 338         void            *addr,
 339         int             type)
 340 {
 341         struct _mhead   *hdr;
 342
 343         if (type >= M_LAST)
 344                 panic("_free TYPE");
 345
 346         if (addr == (void *)ZEROSIZETOKEN)
 347                 return;
 348         if (!addr)
 349                 return; /* correct (convenient bsd kernel legacy) */
 350
 351         hdr = addr; hdr--;
 352         kfree(hdr, hdr->mlen);
 353 }
 354
 355 void *
 356 _MALLOC_ZONE(
 357         size_t          size,
 358         int             type,
 359         int             flags)
 360 {
 361         struct kmzones  *kmz;
 362         void            *elem;
 363
 364         if (type >= M_LAST)
 365                 panic("_malloc_zone TYPE");
 366
 367         kmz = &kmzones[type];
 368         if (kmz->kz_zalloczone == KMZ_MALLOC)
 369                 panic("_malloc_zone ZONE: type = %d", type);
 370
 371 /* XXX */
 372         if (kmz->kz_elemsize == -1)
 373                 panic("_malloc_zone XXX");
 374 /* XXX */
 375         if (size == kmz->kz_elemsize)
 376                 if (flags & M_NOWAIT) {
 377                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 378                 } else {
 379                         elem = (void *)zalloc(kmz->kz_zalloczone);
 380                 }
 381         else
 382                 if (flags & M_NOWAIT) {
 383                         elem = (void *)kalloc_noblock(size);
 384                 } else {
 385                         elem = (void *)kalloc(size);
 386                 }
 387
 388         return (elem);
 389 }
 390
 391 void
 392 _FREE_ZONE(
 393         void            *elem,
 394         size_t          size,
 395         int             type)
 396 {
 397         struct kmzones  *kmz;
 398
 399         if (type >= M_LAST)
 400                 panic("FREE_SIZE");
 401
 402         kmz = &kmzones[type];
 403         if (kmz->kz_zalloczone == KMZ_MALLOC)
 404                 panic("free_zone ZONE");
 405
 406 /* XXX */
 407         if (kmz->kz_elemsize == -1)
 408                 panic("FREE_SIZE XXX");
 409 /* XXX */
 410         if (size == kmz->kz_elemsize)
 411                 zfree(kmz->kz_zalloczone, elem);
 412         else
 413                 kfree(elem, size);
 414 }