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