bsd/kern/kern_malloc.c

   1 /*
   2  * Copyright (c) 2000-2013 Apple 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  * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
  65  * support for mandatory and extensible security protections.  This notice
  66  * is included in support of clause 2.2 (b) of the Apple Public License,
  67  * Version 2.0.
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/malloc.h>
  72
  73 #include <sys/socket.h>
  74 #include <sys/socketvar.h>
  75
  76 #include <net/route.h>
  77 #include <net/necp.h>
  78
  79 #include <netinet/in.h>
  80 #include <netinet/in_systm.h>
  81 #include <netinet/ip.h>
  82 #include <netinet/in_pcb.h>
  83 #include <netinet/flow_divert.h>
  84
  85 #include <sys/event.h>
  86 #include <sys/eventvar.h>
  87
  88 #include <sys/proc_internal.h>
  89 #include <sys/mount_internal.h>
  90 #include <sys/vnode_internal.h>
  91 #include <sys/ubc_internal.h>
  92 #include <sys/namei.h>
  93 #include <sys/file_internal.h>
  94 #include <sys/filedesc.h>
  95 #include <sys/tty.h>
  96 #include <sys/quota.h>
  97 #include <sys/uio_internal.h>
  98 #include <sys/resourcevar.h>
  99 #include <sys/signalvar.h>
 100 #include <sys/decmpfs.h>
 101
 102 #include <miscfs/specfs/specdev.h>
 103
 104 #include <nfs/nfs_conf.h>
 105 #include <nfs/rpcv2.h>
 106 #include <nfs/nfsproto.h>
 107 #include <nfs/nfsnode.h>
 108 #include <nfs/nfsmount.h>
 109
 110 #include <mach/mach_types.h>
 111
 112 #include <kern/zalloc.h>
 113 #include <kern/kalloc.h>
 114
 115 void kmeminit(void);
 116
 117 /* Strings corresponding to types of memory.
 118  * Must be in synch with the #defines is sys/malloc.h
 119  * NOTE - the reason we pass null strings in some cases is to reduce of foot
 120  * print as much as possible for systems where a tiny kernel is needed.
 121  * todo - We should probably redesign this and use enums for our types and only
 122  * include types needed for that configuration of the kernel.  This can't be
 123  * done without some kind of kpi since several types are hardwired and exported
 124  * (for example see types M_UDFMNT, M_TEMP, etc in sys/malloc.h)
 125  */
 126 const char *memname[] = {
 127         "free",         /* 0 M_FREE */
 128         "mbuf",         /* 1 M_MBUF */
 129         "devbuf",       /* 2 M_DEVBUF */
 130         "socket",       /* 3 M_SOCKET */
 131         "pcb",          /* 4 M_PCB */
 132         "routetbl",     /* 5 M_RTABLE */
 133         "hosttbl",      /* 6 M_HTABLE */
 134         "fragtbl",      /* 7 M_FTABLE */
 135         "zombie",       /* 8 M_ZOMBIE */
 136         "ifaddr",       /* 9 M_IFADDR */
 137         "soopts",       /* 10 M_SOOPTS */
 138         "soname",       /* 11 M_SONAME */
 139         "namei",        /* 12 M_NAMEI */
 140         "gprof",        /* 13 M_GPROF */
 141         "ioctlops",     /* 14 M_IOCTLOPS */
 142         "mapmem",       /* 15 M_MAPMEM */
 143         "cred",         /* 16 M_CRED */
 144         "pgrp",         /* 17 M_PGRP */
 145         "session",      /* 18 M_SESSION */
 146         "iov32",        /* 19 M_IOV32 */
 147         "mount",        /* 20 M_MOUNT */
 148         "fhandle",              /* 21 M_FHANDLE */
 149 #if CONFIG_NFS
 150         "NFS req",              /* 22 M_NFSREQ */
 151         "NFS mount",    /* 23 M_NFSMNT */
 152         "NFS node",             /* 24 M_NFSNODE */
 153 #else
 154         "",                             /* 22 M_NFSREQ */
 155         "",                             /* 23 M_NFSMNT */
 156         "",                             /* 24 M_NFSNODE */
 157 #endif
 158         "vnodes",               /* 25 M_VNODE */
 159         "namecache",    /* 26 M_CACHE */
 160 #if QUOTA
 161         "UFS quota",    /* 27 M_DQUOT */
 162 #else
 163         "",                             /* 27 M_DQUOT */
 164 #endif
 165         "proc uuid policy",             /* 28 M_PROC_UUID_POLICY */
 166 #if (SYSV_SEM || SYSV_MSG || SYSV_SHM)
 167         "shm",                  /* 29 M_SHM */
 168 #else
 169         "",                             /* 29 M_SHM */
 170 #endif
 171         "plimit",               /* 30 M_VMMAP */
 172         "sigacts",      /* 31 M_VMMAPENT */
 173         "VM object",    /* 32 M_VMOBJ */
 174         "VM objhash",   /* 33 M_VMOBJHASH */
 175         "VM pmap",              /* 34 M_VMPMAP */
 176         "VM pvmap",             /* 35 M_VMPVENT */
 177         "VM pager",             /* 36 M_VMPAGER */
 178         "VM pgdata",    /* 37 M_VMPGDATA */
 179         "fileproc",             /* 38 M_FILEPROC */
 180         "file desc",    /* 39 M_FILEDESC */
 181         "lockf",                /* 40 M_LOCKF */
 182         "proc",                 /* 41 M_PROC */
 183         "pstats",               /* 42 M_SUBPROC */
 184         "LFS segment",  /* 43 M_SEGMENT */
 185         "LFS node",             /* 44 M_LFSNODE */
 186         "",                             /* 45 M_FFSNODE */
 187         "MFS node",             /* 46 M_MFSNODE */
 188         "NQNFS Lease",  /* 47 M_NQLEASE */
 189         "NQNFS Host",   /* 48 M_NQMHOST */
 190         "Export Host",  /* 49 M_NETADDR */
 191 #if CONFIG_NFS
 192         "NFS srvsock",  /* 50 M_NFSSVC */
 193         "NFS uid",              /* 51 M_NFSUID */
 194         "NFS daemon",   /* 52 M_NFSD */
 195 #else
 196         "",                             /* 50 M_NFSSVC */
 197         "",                             /* 51 M_NFSUID */
 198         "",                             /* 52 M_NFSD */
 199 #endif
 200         "ip_moptions",  /* 53 M_IPMOPTS */
 201         "in_multi",             /* 54 M_IPMADDR */
 202         "ether_multi",  /* 55 M_IFMADDR */
 203         "mrt",                  /* 56 M_MRTABLE */
 204         "",             /* 57 unused entry */
 205         "",             /* 58 unused entry */
 206 #if CONFIG_NFS
 207         "NFSV3 srvdesc",/* 59 M_NFSRVDESC */
 208         "NFSV3 diroff", /* 60 M_NFSDIROFF */
 209         "NFSV3 bigfh",  /* 61 M_NFSBIGFH */
 210 #else
 211         "",                             /* 59 M_NFSRVDESC */
 212         "",                             /* 60 M_NFSDIROFF */
 213         "",                             /* 61 M_NFSBIGFH */
 214 #endif
 215         "MSDOSFS mount",/* 62 M_MSDOSFSMNT */
 216         "MSDOSFS fat",  /* 63 M_MSDOSFSFAT */
 217         "MSDOSFS node", /* 64 M_MSDOSFSNODE */
 218         "ttys",                 /* 65 M_TTYS */
 219         "exec",                 /* 66 M_EXEC */
 220         "miscfs mount", /* 67 M_MISCFSMNT */
 221         "miscfs node",  /* 68 M_MISCFSNODE */
 222         "adosfs mount", /* 69 M_ADOSFSMNT */
 223         "adosfs node",  /* 70 M_ADOSFSNODE */
 224         "adosfs anode", /* 71 M_ANODE */
 225         "buf hdrs",             /* 72 M_BUFHDR */
 226         "ofile tabl",   /* 73 M_OFILETABL */
 227         "mbuf clust",   /* 74 M_MCLUST */
 228         "",                             /* 75 unused */
 229         "",                             /* 76 unused */
 230         "",                             /* 77 unused */
 231         "",                     /* 78 unused */
 232         "",                     /* 79 unused */
 233         "temp",                 /* 80 M_TEMP */
 234         "key mgmt",             /* 81 M_SECA */
 235         "DEVFS",                /* 82 M_DEVFS */
 236         "IpFw/IpAcct",  /* 83 M_IPFW */
 237         "UDF node",             /* 84 M_UDFNODE */
 238         "UDF mount",    /* 85 M_UDFMNT */
 239 #if INET6
 240         "IPv6 NDP",             /* 86 M_IP6NDP */
 241         "IPv6 options", /* 87 M_IP6OPT */
 242         "IPv6 Misc",    /* 88 M_IP6MISC */
 243 #else
 244         "",                             /* 86 M_IP6NDP */
 245         "",                             /* 87 M_IP6OPT */
 246         "",                             /* 88 M_IP6MISC */
 247 #endif
 248         "TCP Segment Q",/* 89 M_TSEGQ */
 249         "IGMP state",   /* 90 M_IGMP */
 250         "",                     /* 91 unused */
 251         "",                     /* 92 unused */
 252         "specinfo",             /* 93 M_SPECINFO */
 253         "kqueue",               /* 94 M_KQUEUE */
 254         "",                             /* 95 unused */
 255         "cluster_read", /* 96 M_CLRDAHEAD */
 256         "cluster_write",/* 97 M_CLWRBEHIND */
 257         "iov64",                /* 98 M_IOV64 */
 258         "fileglob",             /* 99 M_FILEGLOB */
 259         "kauth",                /* 100 M_KAUTH */
 260         "dummynet",             /* 101 M_DUMMYNET */
 261         "",                     /* 102 M_UNSAFEFS */
 262         "macpipelabel", /* 103 M_MACPIPELABEL */
 263         "mactemp",      /* 104 M_MACTEMP */
 264         "sbuf",         /* 105 M_SBUF */
 265         "extattr",      /* 106 M_EXTATTR */
 266         "select",       /* 107 M_SELECT */
 267 #if TRAFFIC_MGT
 268         "traffic_mgt",   /* 108 M_TRAFFIC_MGT */
 269 #else
 270         "", /* 108 M_TRAFFIC_MGT */
 271 #endif
 272 #if FS_COMPRESSION
 273         "decmpfs_cnode",/* 109 M_DECMPFS_CNODE */
 274 #else
 275         "",             /* 109 M_DECMPFS_CNODE */
 276 #endif /* FS_COMPRESSION */
 277         "ipmfilter",    /* 110 M_INMFILTER */
 278         "ipmsource",    /* 111 M_IPMSOURCE */
 279         "in6mfilter",   /* 112 M_IN6MFILTER */
 280         "ip6mopts",     /* 113 M_IP6MOPTS */
 281         "ip6msource",   /* 114 M_IP6MSOURCE */
 282 #if FLOW_DIVERT
 283         "flow_divert_pcb",      /* 115 M_FLOW_DIVERT_PCB */
 284         "flow_divert_group",    /* 116 M_FLOW_DIVERT_GROUP */
 285 #else
 286         "",                                     /* 115 M_FLOW_DIVERT_PCB */
 287         "",                                     /* 116 M_FLOW_DIVERT_GROUP */
 288 #endif
 289         "ip6cga",       /* 117 M_IP6CGA */
 290 #if NECP
 291         "necp",                                 /* 118 M_NECP */
 292         "necp_session_policy",  /* 119 M_NECP_SESSION_POLICY */
 293         "necp_socket_policy",   /* 120 M_NECP_SOCKET_POLICY */
 294         "necp_ip_policy",               /* 121 M_NECP_IP_POLICY */
 295 #else
 296         "",                                             /* 118 M_NECP */
 297         "",                                             /* 119 M_NECP_SESSION_POLICY */
 298         "",                                             /* 120 M_NECP_SOCKET_POLICY */
 299         "",                                             /* 121 M_NECP_IP_POLICY */
 300 #endif
 301         "fdvnodedata"   /* 122 M_FD_VN_DATA */
 302         "fddirbuf",     /* 123 M_FD_DIRBUF */
 303         "netagent",     /* 124 M_NETAGENT */
 304         "Event Handler",/* 125 M_EVENTHANDLER */
 305         "Link Layer Table",     /* 126 M_LLTABLE */
 306         "Network Work Queue",   /* 127 M_NWKWQ */
 307         "Content Filter", /* 128 M_CFIL */
 308         ""
 309 };
 310
 311 /* for use with kmzones.kz_zalloczone */
 312 #define KMZ_CREATEZONE_ACCT     ((void *)-3)
 313 #define KMZ_CREATEZONE          ((void *)-2)
 314 #define KMZ_LOOKUPZONE          ((void *)-1)
 315 #define KMZ_MALLOC                      ((void *)0)
 316 #define KMZ_SHAREZONE           ((void *)1)
 317
 318 struct kmzones {
 319         size_t          kz_elemsize;
 320         void            *kz_zalloczone;
 321         boolean_t       kz_noencrypt;
 322 } kmzones[M_LAST] = {
 323 #define SOS(sname)      sizeof (struct sname)
 324 #define SOX(sname)      -1
 325         { -1, 0, FALSE },                               /* 0 M_FREE */
 326         { MSIZE, KMZ_CREATEZONE, FALSE },               /* 1 M_MBUF */
 327         { 0, KMZ_MALLOC, FALSE },                       /* 2 M_DEVBUF */
 328         { SOS(socket), KMZ_CREATEZONE, TRUE },          /* 3 M_SOCKET */
 329         { SOS(inpcb), KMZ_LOOKUPZONE, TRUE },           /* 4 M_PCB */
 330         { M_MBUF, KMZ_SHAREZONE, FALSE },               /* 5 M_RTABLE */
 331         { M_MBUF, KMZ_SHAREZONE, FALSE },               /* 6 M_HTABLE */
 332         { M_MBUF, KMZ_SHAREZONE, FALSE },               /* 7 M_FTABLE */
 333         { SOS(rusage), KMZ_CREATEZONE, TRUE },          /* 8 M_ZOMBIE */
 334         { 0, KMZ_MALLOC, FALSE },                       /* 9 M_IFADDR */
 335         { M_MBUF, KMZ_SHAREZONE, FALSE },               /* 10 M_SOOPTS */
 336         { 0, KMZ_MALLOC, FALSE },                       /* 11 M_SONAME */
 337         { MAXPATHLEN, KMZ_CREATEZONE, FALSE },          /* 12 M_NAMEI */
 338         { 0, KMZ_MALLOC, FALSE },                       /* 13 M_GPROF */
 339         { 0, KMZ_MALLOC, FALSE },                       /* 14 M_IOCTLOPS */
 340         { 0, KMZ_MALLOC, FALSE },                       /* 15 M_MAPMEM */
 341         { SOS(ucred), KMZ_CREATEZONE, FALSE },          /* 16 M_CRED */
 342         { SOS(pgrp), KMZ_CREATEZONE, FALSE },           /* 17 M_PGRP */
 343         { SOS(session), KMZ_CREATEZONE, FALSE },        /* 18 M_SESSION */
 344         { SOS(user32_iovec), KMZ_LOOKUPZONE, FALSE },   /* 19 M_IOV32 */
 345         { SOS(mount), KMZ_CREATEZONE, FALSE },          /* 20 M_MOUNT */
 346         { 0, KMZ_MALLOC, FALSE },                       /* 21 M_FHANDLE */
 347 #if CONFIG_NFS
 348         { SOS(nfsreq), KMZ_CREATEZONE, FALSE },         /* 22 M_NFSREQ */
 349         { SOS(nfsmount), KMZ_CREATEZONE, FALSE },        /* 23 M_NFSMNT */
 350         { SOS(nfsnode), KMZ_CREATEZONE, FALSE },        /* 24 M_NFSNODE */
 351 #else
 352         { 0, KMZ_MALLOC, FALSE },                       /* 22 M_NFSREQ */
 353         { 0, KMZ_MALLOC, FALSE },                       /* 23 M_NFSMNT */
 354         { 0, KMZ_MALLOC, FALSE },                       /* 24 M_NFSNODE */
 355 #endif
 356         { SOS(vnode), KMZ_CREATEZONE, TRUE },           /* 25 M_VNODE */
 357         { SOS(namecache), KMZ_CREATEZONE, FALSE },      /* 26 M_CACHE */
 358 #if QUOTA
 359         { SOX(dquot), KMZ_LOOKUPZONE, FALSE },          /* 27 M_DQUOT */
 360 #else
 361         { 0, KMZ_MALLOC, FALSE },                       /* 27 M_DQUOT */
 362 #endif
 363         { 0, KMZ_MALLOC, FALSE },                       /* 28 M_PROC_UUID_POLICY */
 364         { 0, KMZ_MALLOC, FALSE },                       /* 29 M_SHM */
 365         { SOS(plimit), KMZ_CREATEZONE, TRUE },          /* 30 M_PLIMIT */
 366         { SOS(sigacts), KMZ_CREATEZONE_ACCT, TRUE },    /* 31 M_SIGACTS */
 367         { 0, KMZ_MALLOC, FALSE },                       /* 32 M_VMOBJ */
 368         { 0, KMZ_MALLOC, FALSE },                       /* 33 M_VMOBJHASH */
 369         { 0, KMZ_MALLOC, FALSE },                       /* 34 M_VMPMAP */
 370         { 0, KMZ_MALLOC, FALSE },                       /* 35 M_VMPVENT */
 371         { 0, KMZ_MALLOC, FALSE },                       /* 36 M_VMPAGER */
 372         { 0, KMZ_MALLOC, FALSE },                       /* 37 M_VMPGDATA */
 373         { SOS(fileproc), KMZ_CREATEZONE_ACCT, TRUE },    /* 38 M_FILEPROC */
 374         { SOS(filedesc), KMZ_CREATEZONE_ACCT, TRUE },    /* 39 M_FILEDESC */
 375         { SOX(lockf), KMZ_CREATEZONE_ACCT, TRUE },      /* 40 M_LOCKF */
 376         { SOS(proc), KMZ_CREATEZONE, FALSE },           /* 41 M_PROC */
 377         { SOS(pstats), KMZ_CREATEZONE, TRUE },          /* 42 M_PSTATS */
 378         { 0, KMZ_MALLOC, FALSE },                       /* 43 M_SEGMENT */
 379         { M_FFSNODE, KMZ_SHAREZONE, FALSE },            /* 44 M_LFSNODE */
 380         { 0, KMZ_MALLOC, FALSE },                       /* 45 M_FFSNODE */
 381         { M_FFSNODE, KMZ_SHAREZONE, FALSE },            /* 46 M_MFSNODE */
 382         { 0, KMZ_MALLOC, FALSE },                       /* 47 M_NQLEASE */
 383         { 0, KMZ_MALLOC, FALSE },                       /* 48 M_NQMHOST */
 384         { 0, KMZ_MALLOC, FALSE },                       /* 49 M_NETADDR */
 385 #if CONFIG_NFS
 386         { SOX(nfsrv_sock),
 387           KMZ_CREATEZONE_ACCT, FALSE },                 /* 50 M_NFSSVC */
 388         { 0, KMZ_MALLOC, FALSE },                       /* 51 M_NFSUID */
 389         { SOX(nfsrvcache),
 390           KMZ_CREATEZONE_ACCT, FALSE },                 /* 52 M_NFSD */
 391 #else
 392         { 0, KMZ_MALLOC, FALSE },                       /* 50 M_NFSSVC */
 393         { 0, KMZ_MALLOC, FALSE },                       /* 51 M_NFSUID */
 394         { 0, KMZ_MALLOC, FALSE },                       /* 52 M_NFSD */
 395 #endif
 396         { SOX(ip_moptions),
 397           KMZ_LOOKUPZONE, FALSE },                      /* 53 M_IPMOPTS */
 398         { SOX(in_multi), KMZ_LOOKUPZONE, FALSE },        /* 54 M_IPMADDR */
 399         { SOX(ether_multi),
 400           KMZ_LOOKUPZONE, FALSE },                      /* 55 M_IFMADDR */
 401         { SOX(mrt), KMZ_CREATEZONE, TRUE },             /* 56 M_MRTABLE */
 402         { 0, KMZ_MALLOC, FALSE },                       /* 57 unused entry */
 403         { 0, KMZ_MALLOC, FALSE },                       /* 58 unused entry */
 404 #if CONFIG_NFS
 405         { SOS(nfsrv_descript),
 406           KMZ_CREATEZONE_ACCT, FALSE },                 /* 59 M_NFSRVDESC */
 407         { SOS(nfsdmap), KMZ_CREATEZONE, FALSE },        /* 60 M_NFSDIROFF */
 408         { SOS(fhandle), KMZ_LOOKUPZONE, FALSE },        /* 61 M_NFSBIGFH */
 409 #else
 410         { 0, KMZ_MALLOC, FALSE },                       /* 59 M_NFSRVDESC */
 411         { 0, KMZ_MALLOC, FALSE },                       /* 60 M_NFSDIROFF */
 412         { 0, KMZ_MALLOC, FALSE },                       /* 61 M_NFSBIGFH */
 413 #endif
 414         { 0, KMZ_MALLOC, FALSE },                       /* 62 M_MSDOSFSMNT */
 415         { 0, KMZ_MALLOC, FALSE },                       /* 63 M_MSDOSFSFAT */
 416         { 0, KMZ_MALLOC, FALSE },                       /* 64 M_MSDOSFSNODE */
 417         { SOS(tty), KMZ_CREATEZONE, FALSE },            /* 65 M_TTYS */
 418         { 0, KMZ_MALLOC, FALSE },                       /* 66 M_EXEC */
 419         { 0, KMZ_MALLOC, FALSE },                       /* 67 M_MISCFSMNT */
 420         { 0, KMZ_MALLOC, FALSE },                       /* 68 M_MISCFSNODE */
 421         { 0, KMZ_MALLOC, FALSE },                       /* 69 M_ADOSFSMNT */
 422         { 0, KMZ_MALLOC, FALSE },                       /* 70 M_ADOSFSNODE */
 423         { 0, KMZ_MALLOC, FALSE },                       /* 71 M_ANODE */
 424         { 0, KMZ_MALLOC, TRUE },                        /* 72 M_BUFHDR */
 425         { (NDFILE * OFILESIZE),
 426           KMZ_CREATEZONE_ACCT, FALSE },                 /* 73 M_OFILETABL */
 427         { MCLBYTES, KMZ_CREATEZONE, FALSE },            /* 74 M_MCLUST */
 428         { 0, KMZ_MALLOC, FALSE },                       /* 75 unused */
 429         { 0, KMZ_MALLOC, FALSE },                       /* 76 unused */
 430         { 0, KMZ_MALLOC, FALSE },                       /* 77 unused */
 431         { 0, KMZ_MALLOC, FALSE },                       /* 78 unused */
 432         { 0, KMZ_MALLOC, FALSE },                       /* 79 unused */
 433         { 0, KMZ_MALLOC, FALSE },                       /* 80 M_TEMP */
 434         { 0, KMZ_MALLOC, FALSE },                       /* 81 M_SECA */
 435         { 0, KMZ_MALLOC, FALSE },                       /* 82 M_DEVFS */
 436         { 0, KMZ_MALLOC, FALSE },                       /* 83 M_IPFW */
 437         { 0, KMZ_MALLOC, FALSE },                       /* 84 M_UDFNODE */
 438         { 0, KMZ_MALLOC, FALSE },                       /* 85 M_UDFMOUNT */
 439         { 0, KMZ_MALLOC, FALSE },                       /* 86 M_IP6NDP */
 440         { 0, KMZ_MALLOC, FALSE },                       /* 87 M_IP6OPT */
 441         { 0, KMZ_MALLOC, FALSE },                       /* 88 M_IP6MISC */
 442         { 0, KMZ_MALLOC, FALSE },                       /* 89 M_TSEGQ */
 443         { 0, KMZ_MALLOC, FALSE },                       /* 90 M_IGMP */
 444         { 0, KMZ_MALLOC, FALSE },                       /* 91 unused */
 445         { 0, KMZ_MALLOC, FALSE },                       /* 92 unused */
 446         { SOS(specinfo), KMZ_CREATEZONE, TRUE },         /* 93 M_SPECINFO */
 447         { SOS(kqueue), KMZ_CREATEZONE, FALSE },         /* 94 M_KQUEUE */
 448         { 0, KMZ_MALLOC, FALSE },                       /* 95 unused */
 449         { SOS(cl_readahead), KMZ_CREATEZONE, TRUE },    /* 96 M_CLRDAHEAD */
 450         { SOS(cl_writebehind), KMZ_CREATEZONE, TRUE },   /* 97 M_CLWRBEHIND */
 451         { SOS(user64_iovec), KMZ_LOOKUPZONE, FALSE },   /* 98 M_IOV64 */
 452         { SOS(fileglob), KMZ_CREATEZONE, TRUE },        /* 99 M_FILEGLOB */
 453         { 0, KMZ_MALLOC, FALSE },                       /* 100 M_KAUTH */
 454         { 0, KMZ_MALLOC, FALSE },                       /* 101 M_DUMMYNET */
 455         { 0, KMZ_MALLOC, FALSE },                       /* 102 M_UNSAFEFS */
 456         { 0, KMZ_MALLOC, FALSE },                       /* 103 M_MACPIPELABEL */
 457         { 0, KMZ_MALLOC, FALSE },                       /* 104 M_MACTEMP */
 458         { 0, KMZ_MALLOC, FALSE },                       /* 105 M_SBUF */
 459         { 0, KMZ_MALLOC, FALSE },                       /* 106 M_HFS_EXTATTR */
 460         { 0, KMZ_MALLOC, FALSE },                       /* 107 M_SELECT */
 461         { 0, KMZ_MALLOC, FALSE },                       /* 108 M_TRAFFIC_MGT */
 462 #if FS_COMPRESSION
 463         { SOS(decmpfs_cnode), KMZ_CREATEZONE, FALSE},   /* 109 M_DECMPFS_CNODE */
 464 #else
 465         { 0, KMZ_MALLOC, FALSE },                       /* 109 M_DECMPFS_CNODE */
 466 #endif /* FS_COMPRESSION */
 467         { 0, KMZ_MALLOC, FALSE },                       /* 110 M_INMFILTER */
 468         { 0, KMZ_MALLOC, FALSE },                       /* 111 M_IPMSOURCE */
 469         { 0, KMZ_MALLOC, FALSE },                       /* 112 M_IN6MFILTER */
 470         { 0, KMZ_MALLOC, FALSE },                       /* 113 M_IP6MOPTS */
 471         { 0, KMZ_MALLOC, FALSE },                       /* 114 M_IP6MSOURCE */
 472 #if FLOW_DIVERT
 473         { SOS(flow_divert_pcb), KMZ_CREATEZONE, TRUE },         /* 115 M_FLOW_DIVERT_PCB */
 474         { SOS(flow_divert_group), KMZ_CREATEZONE, TRUE },       /* 116 M_FLOW_DIVERT_GROUP */
 475 #else
 476         { 0, KMZ_MALLOC, FALSE },                       /* 115 M_FLOW_DIVERT_PCB */
 477         { 0, KMZ_MALLOC, FALSE },                       /* 116 M_FLOW_DIVERT_GROUP */
 478 #endif  /* FLOW_DIVERT */
 479         { 0, KMZ_MALLOC, FALSE },                       /* 117 M_IP6CGA */
 480         { 0, KMZ_MALLOC, FALSE },                       /* 118 M_NECP */
 481 #if NECP
 482         { SOS(necp_session_policy), KMZ_CREATEZONE, TRUE },     /* 119 M_NECP_SESSION_POLICY */
 483         { SOS(necp_kernel_socket_policy), KMZ_CREATEZONE, TRUE },       /* 120 M_NECP_SOCKET_POLICY */
 484         { SOS(necp_kernel_ip_output_policy), KMZ_CREATEZONE, TRUE },    /* 121 M_NECP_IP_POLICY */
 485 #else
 486         { 0, KMZ_MALLOC, FALSE },                       /* 119 M_NECP_SESSION_POLICY */
 487         { 0, KMZ_MALLOC, FALSE },                       /* 120 M_NECP_SOCKET_POLICY */
 488         { 0, KMZ_MALLOC, FALSE },                       /* 121 M_NECP_IP_POLICY */
 489 #endif /* NECP */
 490         { 0, KMZ_MALLOC, FALSE },                       /* 122 M_FD_VN_DATA */
 491         { 0, KMZ_MALLOC, FALSE },                       /* 123 M_FD_DIRBUF */
 492         { 0, KMZ_MALLOC, FALSE },                       /* 124 M_NETAGENT */
 493         { 0, KMZ_MALLOC, FALSE },                       /* 125 M_EVENTHANDLER */
 494         { 0, KMZ_MALLOC, FALSE },                       /* 126 M_LLTABLE */
 495         { 0, KMZ_MALLOC, FALSE },                       /* 127 M_NWKWQ */
 496         { 0, KMZ_MALLOC, FALSE },                       /* 128 M_CFIL */
 497 #undef  SOS
 498 #undef  SOX
 499 };
 500
 501 extern zone_t kalloc_zone(vm_size_t);   /* XXX */
 502
 503 /*
 504  * Initialize the kernel memory allocator
 505  */
 506 void
 507 kmeminit(void)
 508 {
 509         struct kmzones  *kmz;
 510
 511         if ((sizeof(kmzones) / sizeof(kmzones[0])) != (sizeof(memname) / sizeof(memname[0]))) {
 512                 panic("kmeminit: kmzones has %lu elements but memname has %lu\n",
 513                     (sizeof(kmzones) / sizeof(kmzones[0])), (sizeof(memname) / sizeof(memname[0])));
 514         }
 515
 516         kmz = kmzones;
 517         while (kmz < &kmzones[M_LAST]) {
 518 /* XXX */
 519                 if (kmz->kz_elemsize == (size_t)(-1)) {
 520                         ;
 521                 } else
 522 /* XXX */
 523                 if (kmz->kz_zalloczone == KMZ_CREATEZONE ||
 524                     kmz->kz_zalloczone == KMZ_CREATEZONE_ACCT) {
 525                         kmz->kz_zalloczone = zinit(kmz->kz_elemsize,
 526                             1024 * 1024, PAGE_SIZE,
 527                             memname[kmz - kmzones]);
 528                         zone_change(kmz->kz_zalloczone, Z_CALLERACCT,
 529                             (kmz->kz_zalloczone == KMZ_CREATEZONE_ACCT));
 530
 531                         if (kmz->kz_noencrypt == TRUE) {
 532                                 zone_change(kmz->kz_zalloczone, Z_NOENCRYPT, TRUE);
 533                         }
 534                 } else if (kmz->kz_zalloczone == KMZ_LOOKUPZONE) {
 535                         kmz->kz_zalloczone = kalloc_zone(kmz->kz_elemsize);
 536                 }
 537
 538                 kmz++;
 539         }
 540
 541         kmz = kmzones;
 542         while (kmz < &kmzones[M_LAST]) {
 543 /* XXX */
 544                 if (kmz->kz_elemsize == (size_t)(-1)) {
 545                         ;
 546                 } else
 547 /* XXX */
 548                 if (kmz->kz_zalloczone == KMZ_SHAREZONE) {
 549                         kmz->kz_zalloczone =
 550                             kmzones[kmz->kz_elemsize].kz_zalloczone;
 551                         kmz->kz_elemsize =
 552                             kmzones[kmz->kz_elemsize].kz_elemsize;
 553                 }
 554
 555                 kmz++;
 556         }
 557 }
 558
 559 void *
 560 _MALLOC_external(
 561         size_t          size,
 562         int             type,
 563         int             flags);
 564 void *
 565 _MALLOC_external(
 566         size_t          size,
 567         int             type,
 568         int             flags)
 569 {
 570         static vm_allocation_site_t site = { .tag = VM_KERN_MEMORY_KALLOC, .flags = VM_TAG_BT };
 571         return __MALLOC(size, type, flags, &site);
 572 }
 573
 574 void *
 575 __MALLOC(
 576         size_t          size,
 577         int             type,
 578         int             flags,
 579         vm_allocation_site_t *site)
 580 {
 581         void    *addr = NULL;
 582         vm_size_t       msize = size;
 583
 584         if (type >= M_LAST) {
 585                 panic("_malloc TYPE");
 586         }
 587
 588         if (size == 0) {
 589                 return NULL;
 590         }
 591
 592         if (msize != size) {
 593                 panic("Requested size to __MALLOC is too large (%llx)!\n", (uint64_t)size);
 594         }
 595
 596         if (flags & M_NOWAIT) {
 597                 addr = (void *)kalloc_canblock(&msize, FALSE, site);
 598         } else {
 599                 addr = (void *)kalloc_canblock(&msize, TRUE, site);
 600                 if (addr == NULL) {
 601                         /*
 602                          * We get here when the caller told us to block waiting for memory, but
 603                          * kalloc said there's no memory left to get.  Generally, this means there's a
 604                          * leak or the caller asked for an impossibly large amount of memory. If the caller
 605                          * is expecting a NULL return code then it should explicitly set the flag M_NULL.
 606                          * If the caller isn't expecting a NULL return code, we just panic. This is less
 607                          * than ideal, but returning NULL when the caller isn't expecting it doesn't help
 608                          * since the majority of callers don't check the return value and will just
 609                          * dereference the pointer and trap anyway.  We may as well get a more
 610                          * descriptive message out while we can.
 611                          */
 612                         if (flags & M_NULL) {
 613                                 return NULL;
 614                         }
 615                         panic("_MALLOC: kalloc returned NULL (potential leak), size %llu", (uint64_t) size);
 616                 }
 617         }
 618         if (!addr) {
 619                 return 0;
 620         }
 621
 622         if (flags & M_ZERO) {
 623                 bzero(addr, size);
 624         }
 625
 626         return addr;
 627 }
 628
 629 void
 630 _FREE(
 631         void            *addr,
 632         int             type)
 633 {
 634         if (type >= M_LAST) {
 635                 panic("_free TYPE");
 636         }
 637
 638         if (!addr) {
 639                 return; /* correct (convenient bsd kernel legacy) */
 640         }
 641         kfree_addr(addr);
 642 }
 643
 644 void *
 645 __REALLOC(
 646         void            *addr,
 647         size_t          size,
 648         int             type,
 649         int             flags,
 650         vm_allocation_site_t *site)
 651 {
 652         void            *newaddr;
 653         size_t          alloc;
 654
 655         /* realloc(NULL, ...) is equivalent to malloc(...) */
 656         if (addr == NULL) {
 657                 return __MALLOC(size, type, flags, site);
 658         }
 659
 660         alloc = kalloc_size(addr);
 661         /*
 662          * Find out the size of the bucket in which the new sized allocation
 663          * would land. If it matches the bucket of the original allocation,
 664          * simply return the address.
 665          */
 666         if (kalloc_bucket_size(size) == alloc) {
 667                 if (flags & M_ZERO) {
 668                         if (alloc < size) {
 669                                 bzero(addr + alloc, (size - alloc));
 670                         } else {
 671                                 bzero(addr + size, (alloc - size));
 672                         }
 673                 }
 674                 return addr;
 675         }
 676
 677         /* Allocate a new, bigger (or smaller) block */
 678         if ((newaddr = __MALLOC(size, type, flags, site)) == NULL) {
 679                 return NULL;
 680         }
 681
 682         /* Copy over original contents */
 683         bcopy(addr, newaddr, MIN(size, alloc));
 684         _FREE(addr, type);
 685
 686         return newaddr;
 687 }
 688
 689 void *
 690 _MALLOC_ZONE_external(
 691         size_t          size,
 692         int             type,
 693         int             flags);
 694 void *
 695 _MALLOC_ZONE_external(
 696         size_t          size,
 697         int             type,
 698         int             flags)
 699 {
 700         return __MALLOC_ZONE(size, type, flags, NULL);
 701 }
 702
 703 void *
 704 __MALLOC_ZONE(
 705         size_t          size,
 706         int             type,
 707         int             flags,
 708         vm_allocation_site_t *site)
 709 {
 710         struct kmzones  *kmz;
 711         void            *elem;
 712
 713         if (type >= M_LAST) {
 714                 panic("_malloc_zone TYPE");
 715         }
 716
 717         kmz = &kmzones[type];
 718         if (kmz->kz_zalloczone == KMZ_MALLOC) {
 719                 panic("_malloc_zone ZONE: type = %d", type);
 720         }
 721
 722 /* XXX */
 723         if (kmz->kz_elemsize == (size_t)(-1)) {
 724                 panic("_malloc_zone XXX");
 725         }
 726 /* XXX */
 727         if (size == kmz->kz_elemsize) {
 728                 if (flags & M_NOWAIT) {
 729                         elem = (void *)zalloc_noblock(kmz->kz_zalloczone);
 730                 } else {
 731                         elem = (void *)zalloc(kmz->kz_zalloczone);
 732                 }
 733         } else {
 734                 vm_size_t kalloc_size = size;
 735                 if (size > kalloc_size) {
 736                         elem = NULL;
 737                 } else if (flags & M_NOWAIT) {
 738                         elem = (void *)kalloc_canblock(&kalloc_size, FALSE, site);
 739                 } else {
 740                         elem = (void *)kalloc_canblock(&kalloc_size, TRUE, site);
 741                 }
 742         }
 743
 744         if (elem && (flags & M_ZERO)) {
 745                 bzero(elem, size);
 746         }
 747
 748         return elem;
 749 }
 750
 751 void
 752 _FREE_ZONE(
 753         void            *elem,
 754         size_t          size,
 755         int             type)
 756 {
 757         struct kmzones  *kmz;
 758
 759         if (type >= M_LAST) {
 760                 panic("FREE_SIZE");
 761         }
 762
 763         kmz = &kmzones[type];
 764         if (kmz->kz_zalloczone == KMZ_MALLOC) {
 765                 panic("free_zone ZONE");
 766         }
 767
 768 /* XXX */
 769         if (kmz->kz_elemsize == (size_t)(-1)) {
 770                 panic("FREE_SIZE XXX");
 771         }
 772 /* XXX */
 773         if (size == kmz->kz_elemsize) {
 774                 zfree(kmz->kz_zalloczone, elem);
 775         } else {
 776                 kfree(elem, size);
 777         }
 778 }
 779
 780 #if DEBUG || DEVELOPMENT
 781
 782 extern unsigned int zone_map_jetsam_limit;
 783
 784 static int
 785 sysctl_zone_map_jetsam_limit SYSCTL_HANDLER_ARGS
 786 {
 787 #pragma unused(oidp, arg1, arg2)
 788         int oldval = 0, val = 0, error = 0;
 789
 790         oldval = zone_map_jetsam_limit;
 791         error = sysctl_io_number(req, oldval, sizeof(int), &val, NULL);
 792         if (error || !req->newptr) {
 793                 return error;
 794         }
 795
 796         if (val <= 0 || val > 100) {
 797                 printf("sysctl_zone_map_jetsam_limit: new jetsam limit value is invalid.\n");
 798                 return EINVAL;
 799         }
 800
 801         zone_map_jetsam_limit = val;
 802         return 0;
 803 }
 804
 805 SYSCTL_PROC(_kern, OID_AUTO, zone_map_jetsam_limit, CTLTYPE_INT | CTLFLAG_RW, 0, 0,
 806     sysctl_zone_map_jetsam_limit, "I", "Zone map jetsam limit");
 807
 808
 809 extern void get_zone_map_size(uint64_t *current_size, uint64_t *capacity);
 810
 811 static int
 812 sysctl_zone_map_size_and_capacity SYSCTL_HANDLER_ARGS
 813 {
 814 #pragma unused(oidp, arg1, arg2)
 815         uint64_t zstats[2];
 816         get_zone_map_size(&zstats[0], &zstats[1]);
 817
 818         return SYSCTL_OUT(req, &zstats, sizeof(zstats));
 819 }
 820
 821 SYSCTL_PROC(_kern, OID_AUTO, zone_map_size_and_capacity,
 822     CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_MASKED | CTLFLAG_LOCKED,
 823     0, 0, &sysctl_zone_map_size_and_capacity, "Q", "Current size and capacity of the zone map");
 824
 825
 826 extern boolean_t run_zone_test(void);
 827
 828 static int
 829 sysctl_run_zone_test SYSCTL_HANDLER_ARGS
 830 {
 831 #pragma unused(oidp, arg1, arg2)
 832         /* require setting this sysctl to prevent sysctl -a from running this */
 833         if (!req->newptr) {
 834                 return 0;
 835         }
 836
 837         int ret_val = run_zone_test();
 838         return SYSCTL_OUT(req, &ret_val, sizeof(ret_val));
 839 }
 840
 841 SYSCTL_PROC(_kern, OID_AUTO, run_zone_test,
 842     CTLTYPE_INT | CTLFLAG_WR | CTLFLAG_MASKED | CTLFLAG_LOCKED,
 843     0, 0, &sysctl_run_zone_test, "I", "Test zone allocator KPI");
 844
 845 #endif /* DEBUG || DEVELOPMENT */
 846
 847 #if CONFIG_ZLEAKS
 848
 849 SYSCTL_DECL(_kern_zleak);
 850 SYSCTL_NODE(_kern, OID_AUTO, zleak, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "zleak");
 851
 852 /*
 853  * kern.zleak.active
 854  *
 855  * Show the status of the zleak subsystem (0 = enabled, 1 = active,
 856  * and -1 = failed), and if enabled, allow it to be activated immediately.
 857  */
 858 static int
 859 sysctl_zleak_active SYSCTL_HANDLER_ARGS
 860 {
 861 #pragma unused(arg1, arg2)
 862         int oldval, val, error;
 863
 864         val = oldval = get_zleak_state();
 865         error = sysctl_handle_int(oidp, &val, 0, req);
 866         if (error || !req->newptr) {
 867                 return error;
 868         }
 869         /*
 870          * Can only be activated if it's off (and not failed.)
 871          * Cannot be deactivated once it's on.
 872          */
 873         if (val == 1 && oldval == 0) {
 874                 kern_return_t kr = zleak_activate();
 875
 876                 if (KERN_SUCCESS != kr) {
 877                         printf("zleak_active: failed to activate "
 878                             "live zone leak debugging (%d).\n", kr);
 879                 }
 880         }
 881         if (val == 0 && oldval == 1) {
 882                 printf("zleak_active: active, cannot be disabled.\n");
 883                 return EINVAL;
 884         }
 885         return 0;
 886 }
 887
 888 SYSCTL_PROC(_kern_zleak, OID_AUTO, active,
 889     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
 890     0, 0, sysctl_zleak_active, "I", "zleak activity");
 891
 892 /*
 893  * kern.zleak.max_zonemap_size
 894  *
 895  * Read the value of the maximum zonemap size in bytes; useful
 896  * as the maximum size that zleak.global_threshold and
 897  * zleak.zone_threshold should be set to.
 898  */
 899 static int
 900 sysctl_zleak_max_zonemap_size SYSCTL_HANDLER_ARGS
 901 {
 902         uint64_t zmap_max_size = *(vm_size_t *)arg1;
 903
 904         return sysctl_handle_quad(oidp, &zmap_max_size, arg2, req);
 905 }
 906
 907 SYSCTL_PROC(_kern_zleak, OID_AUTO, max_zonemap_size,
 908     CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
 909     &zleak_max_zonemap_size, 0,
 910     sysctl_zleak_max_zonemap_size, "Q", "zleak max zonemap size");
 911
 912
 913 static int
 914 sysctl_zleak_threshold SYSCTL_HANDLER_ARGS
 915 {
 916 #pragma unused(oidp, arg2)
 917         int error;
 918         uint64_t value = *(vm_size_t *)arg1;
 919
 920         error = sysctl_io_number(req, value, sizeof(value), &value, NULL);
 921
 922         if (error || !req->newptr) {
 923                 return error;
 924         }
 925
 926         if (value > (uint64_t)zleak_max_zonemap_size) {
 927                 return ERANGE;
 928         }
 929
 930         *(vm_size_t *)arg1 = value;
 931         return 0;
 932 }
 933
 934 /*
 935  * kern.zleak.global_threshold
 936  *
 937  * Set the global zleak threshold size (in bytes).  If the zone map
 938  * grows larger than this value, zleaks are automatically activated.
 939  *
 940  * The default value is set in zleak_init().
 941  */
 942 SYSCTL_PROC(_kern_zleak, OID_AUTO, global_threshold,
 943     CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
 944     &zleak_global_tracking_threshold, 0,
 945     sysctl_zleak_threshold, "Q", "zleak global threshold");
 946
 947 /*
 948  * kern.zleak.zone_threshold
 949  *
 950  * Set the per-zone threshold size (in bytes) above which any
 951  * zone will automatically start zleak tracking.
 952  *
 953  * The default value is set in zleak_init().
 954  *
 955  * Setting this variable will have no effect until zleak tracking is
 956  * activated (See above.)
 957  */
 958 SYSCTL_PROC(_kern_zleak, OID_AUTO, zone_threshold,
 959     CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
 960     &zleak_per_zone_tracking_threshold, 0,
 961     sysctl_zleak_threshold, "Q", "zleak per-zone threshold");
 962
 963 #endif  /* CONFIG_ZLEAKS */
 964
 965 extern uint64_t get_zones_collectable_bytes(void);
 966
 967 static int
 968 sysctl_zones_collectable_bytes SYSCTL_HANDLER_ARGS
 969 {
 970 #pragma unused(oidp, arg1, arg2)
 971         uint64_t zones_free_mem = get_zones_collectable_bytes();
 972
 973         return SYSCTL_OUT(req, &zones_free_mem, sizeof(zones_free_mem));
 974 }
 975
 976 SYSCTL_PROC(_kern, OID_AUTO, zones_collectable_bytes,
 977     CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_MASKED | CTLFLAG_LOCKED,
 978     0, 0, &sysctl_zones_collectable_bytes, "Q", "Collectable memory in zones");