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 #include <sys/resourcevar.h>
  91
  92 #include <ufs/ufs/inode.h>
  93
  94 #include <hfs/hfs_cnode.h>
  95 #include <isofs/cd9660/cd9660_node.h>
  96
  97 #include <miscfs/volfs/volfs.h>
  98 #include <miscfs/specfs/specdev.h>
  99
 100 #include <nfs/rpcv2.h>
 101 #include <nfs/nfsproto.h>
 102 #include <nfs/nfsnode.h>
 103 #include <nfs/nfsmount.h>
 104
 105 #include <vfs/vfs_journal.h>
 106
 107 #include <mach/mach_types.h>
 108
 109 #include <kern/zalloc.h>
 110 #include <kern/kalloc.h>
 111
 112 struct kmemstats kmemstats[M_LAST];
 113 char *memname[] = INITKMEMNAMES;
 114
 115 struct kmzones {
 116         size_t          kz_elemsize;
 117         void            *kz_zalloczone;
 118 #define KMZ_CREATEZONE          ((void *)-2)
 119 #define KMZ_LOOKUPZONE          ((void *)-1)
 120 #define KMZ_MALLOC              ((void *)0)
 121 #define KMZ_SHAREZONE           ((void *)1)
 122 } kmzones[M_LAST] = {
 123 #define SOS(sname)      sizeof (struct sname)
 124 #define SOX(sname)      -1
 125         -1,             0,                      /* 0 M_FREE */
 126         MSIZE,          KMZ_CREATEZONE,         /* 1 M_MBUF */
 127         0,              KMZ_MALLOC,             /* 2 M_DEVBUF */
 128         SOS(socket),    KMZ_CREATEZONE,         /* 3 M_SOCKET */
 129         SOS(inpcb),     KMZ_LOOKUPZONE,         /* 4 M_PCB */
 130         M_MBUF,         KMZ_SHAREZONE,          /* 5 M_RTABLE */
 131         M_MBUF,         KMZ_SHAREZONE,          /* 6 M_HTABLE */
 132         M_MBUF,         KMZ_SHAREZONE,          /* 7 M_FTABLE */
 133         SOS(rusage),    KMZ_CREATEZONE,         /* 8 M_ZOMBIE */
 134         0,              KMZ_MALLOC,             /* 9 M_IFADDR */
 135         M_MBUF,         KMZ_SHAREZONE,          /* 10 M_SOOPTS */
 136         0,              KMZ_MALLOC,             /* 11 M_SONAME */
 137         MAXPATHLEN,     KMZ_CREATEZONE,         /* 12 M_NAMEI */
 138         0,              KMZ_MALLOC,             /* 13 M_GPROF */
 139         0,              KMZ_MALLOC,             /* 14 M_IOCTLOPS */
 140         0,              KMZ_MALLOC,             /* 15 M_MAPMEM */
 141         SOS(ucred),     KMZ_CREATEZONE,         /* 16 M_CRED */
 142         SOS(pgrp),      KMZ_CREATEZONE,         /* 17 M_PGRP */
 143         SOS(session),   KMZ_CREATEZONE,         /* 18 M_SESSION */
 144         SOS(iovec_32),  KMZ_LOOKUPZONE,         /* 19 M_IOV32 */
 145         SOS(mount),     KMZ_CREATEZONE,         /* 20 M_MOUNT */
 146         0,              KMZ_MALLOC,             /* 21 M_FHANDLE */
 147         SOS(nfsreq),    KMZ_CREATEZONE,         /* 22 M_NFSREQ */
 148         SOS(nfsmount),  KMZ_CREATEZONE,         /* 23 M_NFSMNT */
 149         SOS(nfsnode),   KMZ_CREATEZONE,         /* 24 M_NFSNODE */
 150         SOS(vnode),     KMZ_CREATEZONE,         /* 25 M_VNODE */
 151         SOS(namecache), KMZ_CREATEZONE,         /* 26 M_CACHE */
 152         SOX(dquot),     KMZ_LOOKUPZONE,         /* 27 M_DQUOT */
 153         SOX(ufsmount),  KMZ_LOOKUPZONE,         /* 28 M_UFSMNT */
 154         0,              KMZ_MALLOC,             /* 29 M_CGSUM */
 155         0,              KMZ_MALLOC,             /* 30 M_VMMAP */
 156         0,              KMZ_MALLOC,             /* 31 M_VMMAPENT */
 157         0,              KMZ_MALLOC,             /* 32 M_VMOBJ */
 158         0,              KMZ_MALLOC,             /* 33 M_VMOBJHASH */
 159         0,              KMZ_MALLOC,             /* 34 M_VMPMAP */
 160         0,              KMZ_MALLOC,             /* 35 M_VMPVENT */
 161         0,              KMZ_MALLOC,             /* 36 M_VMPAGER */
 162         0,              KMZ_MALLOC,             /* 37 M_VMPGDATA */
 163         SOS(fileproc),  KMZ_CREATEZONE,         /* 38 M_FILEPROC */
 164         SOS(filedesc),  KMZ_CREATEZONE,         /* 39 M_FILEDESC */
 165         SOX(lockf),     KMZ_CREATEZONE,         /* 40 M_LOCKF */
 166         SOS(proc),      KMZ_CREATEZONE,         /* 41 M_PROC */
 167         SOS(pstats),    KMZ_CREATEZONE,         /* 42 M_SUBPROC */
 168         0,              KMZ_MALLOC,             /* 43 M_SEGMENT */
 169         M_FFSNODE,      KMZ_SHAREZONE,          /* 44 M_LFSNODE */
 170         SOS(inode),     KMZ_CREATEZONE,         /* 45 M_FFSNODE */
 171         M_FFSNODE,      KMZ_SHAREZONE,          /* 46 M_MFSNODE */
 172         0,              KMZ_MALLOC,             /* 47 M_NQLEASE */
 173         0,              KMZ_MALLOC,             /* 48 M_NQMHOST */
 174         0,              KMZ_MALLOC,             /* 49 M_NETADDR */
 175         SOX(nfssvc_sock),
 176                         KMZ_CREATEZONE,         /* 50 M_NFSSVC */
 177         SOS(nfsuid),    KMZ_CREATEZONE,         /* 51 M_NFSUID */
 178         SOX(nfsrvcache),
 179                         KMZ_CREATEZONE,         /* 52 M_NFSD */
 180         SOX(ip_moptions),
 181                         KMZ_LOOKUPZONE,         /* 53 M_IPMOPTS */
 182         SOX(in_multi),  KMZ_LOOKUPZONE,         /* 54 M_IPMADDR */
 183         SOX(ether_multi),
 184                         KMZ_LOOKUPZONE,         /* 55 M_IFMADDR */
 185         SOX(mrt),       KMZ_CREATEZONE,         /* 56 M_MRTABLE */
 186         SOX(iso_mnt),   KMZ_LOOKUPZONE,         /* 57 M_ISOFSMNT */
 187         SOS(iso_node),  KMZ_CREATEZONE,         /* 58 M_ISOFSNODE */
 188         SOS(nfsrv_descript),
 189                         KMZ_CREATEZONE,         /* 59 M_NFSRVDESC */
 190         SOS(nfsdmap),   KMZ_CREATEZONE,         /* 60 M_NFSDIROFF */
 191         SOS(fhandle),   KMZ_LOOKUPZONE,         /* 61 M_NFSBIGFH */
 192         0,              KMZ_MALLOC,             /* 62 M_MSDOSFSMNT */
 193         0,              KMZ_MALLOC,             /* 63 M_MSDOSFSFAT */
 194         0,              KMZ_MALLOC,             /* 64 M_MSDOSFSNODE */
 195         SOS(tty),       KMZ_CREATEZONE,         /* 65 M_TTYS */
 196         0,              KMZ_MALLOC,             /* 66 M_EXEC */
 197         0,              KMZ_MALLOC,             /* 67 M_MISCFSMNT */
 198         0,              KMZ_MALLOC,             /* 68 M_MISCFSNODE */
 199         0,              KMZ_MALLOC,             /* 69 M_ADOSFSMNT */
 200         0,              KMZ_MALLOC,             /* 70 M_ADOSFSNODE */
 201         0,              KMZ_MALLOC,             /* 71 M_ANODE */
 202         SOX(buf),       KMZ_CREATEZONE,         /* 72 M_BUFHDR */
 203         (NDFILE * OFILESIZE),
 204                         KMZ_CREATEZONE,         /* 73 M_OFILETABL */
 205         MCLBYTES,       KMZ_CREATEZONE,         /* 74 M_MCLUST */
 206         SOX(hfsmount),  KMZ_LOOKUPZONE,         /* 75 M_HFSMNT */
 207         SOS(cnode),     KMZ_CREATEZONE,         /* 76 M_HFSNODE */
 208         SOS(filefork),  KMZ_CREATEZONE,         /* 77 M_HFSFORK */
 209         SOX(volfs_mntdata),     KMZ_LOOKUPZONE,         /* 78 M_VOLFSMNT */
 210         SOS(volfs_vndata),      KMZ_CREATEZONE,         /* 79 M_VOLFSNODE */
 211         0,              KMZ_MALLOC,             /* 80 M_TEMP */
 212         0,              KMZ_MALLOC,             /* 81 M_SECA */
 213         0,              KMZ_MALLOC,             /* 82 M_DEVFS */
 214         0,              KMZ_MALLOC,             /* 83 M_IPFW */
 215         0,              KMZ_MALLOC,             /* 84 M_UDFNODE */
 216         0,              KMZ_MALLOC,             /* 85 M_UDFMOUNT */
 217         0,              KMZ_MALLOC,             /* 86 M_IP6NDP */
 218         0,              KMZ_MALLOC,             /* 87 M_IP6OPT */
 219         0,              KMZ_MALLOC,             /* 88 M_IP6MISC */
 220         0,              KMZ_MALLOC,             /* 89 M_TSEGQ */
 221         0,              KMZ_MALLOC,             /* 90 M_IGMP */
 222         SOS(journal), KMZ_CREATEZONE,     /* 91 M_JNL_JNL */
 223         SOS(transaction), KMZ_CREATEZONE,     /* 92 M_JNL_TR */
 224         SOS(specinfo), KMZ_CREATEZONE,          /* 93 M_SPECINFO */
 225         SOS(kqueue), KMZ_CREATEZONE,            /* 94 M_KQUEUE */
 226         SOS(directoryhint), KMZ_CREATEZONE,     /* 95 M_HFSDIRHINT */
 227         SOS(cl_readahead),  KMZ_CREATEZONE,     /* 96 M_CLRDAHEAD */
 228         SOS(cl_writebehind),KMZ_CREATEZONE,     /* 97 M_CLWRBEHIND */
 229         SOS(iovec_64),  KMZ_LOOKUPZONE,         /* 98 M_IOV64 */
 230         SOS(fileglob),  KMZ_CREATEZONE,         /* 99 M_FILEGLOB */
 231         0,              KMZ_MALLOC,             /* 100 M_KAUTH */
 232         0,              KMZ_MALLOC,             /* 101 M_DUMMYNET */
 233         SOS(unsafe_fsnode),KMZ_CREATEZONE,      /* 102 M_UNSAFEFS */
 234 #undef  SOS
 235 #undef  SOX
 236 };
 237
 238 extern zone_t kalloc_zone(vm_size_t);   /* XXX */
 239
 240 /*
 241  * Initialize the kernel memory allocator
 242  */
 243 void
 244 kmeminit(void)
 245 {
 246         struct kmzones  *kmz;
 247
 248         if ((sizeof(kmzones)/sizeof(kmzones[0])) != (sizeof(memname)/sizeof(memname[0]))) {
 249                 panic("kmeminit: kmzones has %d elements but memname has %d\n",
 250                           (sizeof(kmzones)/sizeof(kmzones[0])), (sizeof(memname)/sizeof(memname[0])));
 251         }
 252
 253         kmz = kmzones;
 254         while (kmz < &kmzones[M_LAST]) {
 255 /* XXX */
 256                 if (kmz->kz_elemsize == -1)
 257                         ;
 258                 else
 259 /* XXX */
 260                 if (kmz->kz_zalloczone == KMZ_CREATEZONE) {
 261                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 262                                                 1024 * 1024, PAGE_SIZE,
 263                                                 memname[kmz - kmzones]);
 264                 }
 265                 else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE)
 266                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 267
 268                 kmz++;
 269         }
 270
 271         kmz = kmzones;
 272         while (kmz < &kmzones[M_LAST]) {
 273 /* XXX */
 274                 if (kmz->kz_elemsize == -1)
 275                         ;
 276                 else
 277 /* XXX */
 278                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 279                         kmz->kz_zalloczone =
 280                                 kmzones[kmz->kz_elemsize].kz_zalloczone;
 281                         kmz->kz_elemsize =
 282                                 kmzones[kmz->kz_elemsize].kz_elemsize;
 283                 }
 284
 285                 kmz++;
 286         }
 287 }
 288
 289 #define MDECL(reqlen)                                   \
 290 union {                                                 \
 291         struct  _mhead hdr;                             \
 292         char    _m[(reqlen) + sizeof (struct _mhead)];  \
 293 }
 294
 295 struct _mhead {
 296         size_t  mlen;
 297         char    dat[0];
 298 };
 299
 300 #define ZEROSIZETOKEN (void *)0xFADEDFAD
 301
 302 void *
 303 _MALLOC(
 304         size_t          size,
 305         int             type,
 306         int             flags)
 307 {
 308         MDECL(size)     *mem;
 309         size_t          memsize = sizeof (*mem);
 310
 311         if (type >= M_LAST)
 312                 panic("_malloc TYPE");
 313
 314         /*
 315          * On zero request we do not return zero as that
 316          * could be mistaken for ENOMEM.
 317          */
 318         if (size == 0)
 319                 return (ZEROSIZETOKEN);
 320
 321         if (flags & M_NOWAIT) {
 322                 mem = (void *)kalloc_noblock(memsize);
 323         } else {
 324                 mem = (void *)kalloc(memsize);
 325         }
 326         if (!mem)
 327                 return (0);
 328
 329         mem->hdr.mlen = memsize;
 330
 331         if (flags & M_ZERO)
 332                 bzero(mem->hdr.dat, size);
 333
 334         return  (mem->hdr.dat);
 335 }
 336
 337 void
 338 _FREE(
 339         void            *addr,
 340         int             type)
 341 {
 342         struct _mhead   *hdr;
 343
 344         if (type >= M_LAST)
 345                 panic("_free TYPE");
 346
 347         if (addr == (void *)ZEROSIZETOKEN)
 348                 return;
 349         if (!addr)
 350                 return; /* correct (convenient bsd kernel legacy) */
 351
 352         hdr = addr; hdr--;
 353         kfree(hdr, hdr->mlen);
 354 }
 355
 356 void *
 357 _MALLOC_ZONE(
 358         size_t          size,
 359         int             type,
 360         int             flags)
 361 {
 362         struct kmzones  *kmz;
 363         void            *elem;
 364
 365         if (type >= M_LAST)
 366                 panic("_malloc_zone TYPE");
 367
 368         kmz = &kmzones[type];
 369         if (kmz->kz_zalloczone == KMZ_MALLOC)
 370                 panic("_malloc_zone ZONE: type = %d", type);
 371
 372 /* XXX */
 373         if (kmz->kz_elemsize == -1)
 374                 panic("_malloc_zone XXX");
 375 /* XXX */
 376         if (size == kmz->kz_elemsize)
 377                 if (flags & M_NOWAIT) {
 378                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 379                 } else {
 380                         elem = (void *)zalloc(kmz->kz_zalloczone);
 381                 }
 382         else
 383                 if (flags & M_NOWAIT) {
 384                         elem = (void *)kalloc_noblock(size);
 385                 } else {
 386                         elem = (void *)kalloc(size);
 387                 }
 388
 389         return (elem);
 390 }
 391
 392 void
 393 _FREE_ZONE(
 394         void            *elem,
 395         size_t          size,
 396         int             type)
 397 {
 398         struct kmzones  *kmz;
 399
 400         if (type >= M_LAST)
 401                 panic("FREE_SIZE");
 402
 403         kmz = &kmzones[type];
 404         if (kmz->kz_zalloczone == KMZ_MALLOC)
 405                 panic("free_zone ZONE");
 406
 407 /* XXX */
 408         if (kmz->kz_elemsize == -1)
 409                 panic("FREE_SIZE XXX");
 410 /* XXX */
 411         if (size == kmz->kz_elemsize)
 412                 zfree(kmz->kz_zalloczone, elem);
 413         else
 414                 kfree(elem, size);
 415 }