/* * Copyright (c) 1987, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)malloc.h 8.5 (Berkeley) 5/3/95 * $FreeBSD: src/sys/sys/malloc.h,v 1.48.2.2 2002/03/16 02:19:16 archie Exp $ */ #ifndef _SYS_MALLOC_H_ #define _SYS_MALLOC_H_ #ifndef _SYS_TYPES_H_ #include #endif #ifndef _MACHINE_TYPES_H_ #include /* vm_paddr_t and __* types */ #endif #ifndef _MACHINE_PARAM_H_ #include /* for SMP_MAXCPU */ #endif #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) #endif /* _KERNEL */ /* * flags to malloc. */ #define M_RNOWAIT 0x0001 /* do not block */ #define M_WAITOK 0x0002 /* wait for resources / alloc from cache */ #define M_ZERO 0x0100 /* bzero() the allocation */ #define M_USE_RESERVE 0x0200 /* can eat into free list reserve */ #define M_NULLOK 0x0400 /* ok to return NULL */ #define M_PASSIVE_ZERO 0x0800 /* (internal to the slab code only) */ #define M_USE_INTERRUPT_RESERVE \ 0x1000 /* can exhaust free list entirely */ #define M_POWEROF2 0x2000 /* roundup size to the nearest power of 2 */ /* * M_NOWAIT has to be a set of flags for equivalence to prior use. * * M_SYSALLOC should be used for any critical infrastructure allocations * made by the kernel proper. * * M_INTNOWAIT should be used for any critical infrastructure allocations * made by interrupts. Such allocations can still fail but will not fail * as often as M_NOWAIT. * * NOTE ON DRAGONFLY USE OF M_NOWAIT. In FreeBSD M_NOWAIT allocations * almost always succeed. In DragonFly, however, there is a good chance * that an allocation will fail. M_NOWAIT should only be used when * allocations can fail without any serious detriment to the system. * * Note that allocations made from (preempted) interrupts will attempt to * use pages from the VM PAGE CACHE (PQ_CACHE) (i.e. those associated with * objects). This is automatic. */ #define M_INTNOWAIT (M_RNOWAIT | M_NULLOK | \ M_USE_RESERVE | M_USE_INTERRUPT_RESERVE) #define M_SYSNOWAIT (M_RNOWAIT | M_NULLOK | M_USE_RESERVE) #define M_INTWAIT (M_WAITOK | M_USE_RESERVE | M_USE_INTERRUPT_RESERVE) #define M_SYSWAIT (M_WAITOK | M_USE_RESERVE) #define M_NOWAIT (M_RNOWAIT | M_NULLOK | M_USE_RESERVE) #define M_SYSALLOC M_SYSWAIT #define M_MAGIC 877983977 /* time when first defined :-) */ /* * The malloc tracking structure. Note that per-cpu entries must be * aggregated for accurate statistics, they do not actually break the * stats down by cpu (e.g. the cpu freeing memory will subtract from * its slot, not the originating cpu's slot). * * SMP_MAXCPU is used so modules which use malloc remain compatible * between UP and SMP. */ struct malloc_type { struct malloc_type *ks_next; /* next in list */ size_t ks_memuse[SMP_MAXCPU]; /* total memory held in bytes */ size_t ks_loosememuse; /* (inaccurate) aggregate memuse */ size_t ks_limit; /* most that are allowed to exist */ long ks_size; /* sizes of this thing that are allocated */ size_t ks_inuse[SMP_MAXCPU]; /* # of allocs currently in use */ __int64_t ks_calls; /* total packets of this type ever allocated */ long ks_maxused; /* maximum number ever used */ __uint32_t ks_magic; /* if it's not magic, don't touch it */ const char *ks_shortdesc; /* short description */ __uint16_t ks_limblocks; /* number of times blocked for hitting limit */ __uint16_t ks_mapblocks; /* number of times blocked for kernel map */ long ks_reserved[4]; /* future use (module compatibility) */ }; typedef struct malloc_type *malloc_type_t; #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) #define MALLOC_DEFINE(type, shortdesc, longdesc) \ struct malloc_type type[1] = { \ { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0, { 0 } } \ }; \ SYSINIT(type##_init, SI_BOOT1_KMALLOC, SI_ORDER_ANY, malloc_init, type); \ SYSUNINIT(type##_uninit, SI_BOOT1_KMALLOC, SI_ORDER_ANY, malloc_uninit, type) #else #define MALLOC_DEFINE(type, shortdesc, longdesc) \ struct malloc_type type[1] = { \ { NULL, { 0 }, 0, 0, 0, { 0 }, 0, 0, M_MAGIC, shortdesc, 0, 0 } \ }; #endif #define MALLOC_DECLARE(type) \ extern struct malloc_type type[1] #ifdef _KERNEL MALLOC_DECLARE(M_CACHE); MALLOC_DECLARE(M_DEVBUF); MALLOC_DECLARE(M_TEMP); MALLOC_DECLARE(M_IP6OPT); /* for INET6 */ MALLOC_DECLARE(M_IP6NDP); /* for INET6 */ #endif /* _KERNEL */ #ifdef _KERNEL #define MINALLOCSIZE sizeof(void *) /* * XXX this should be declared in , but that tends to fail * because is included in a header before the source file * has a chance to include to get MALLOC_DECLARE() defined. */ MALLOC_DECLARE(M_IOV); /* XXX struct malloc_type is unused for contig*(). */ size_t kmem_lim_size(void); void contigfree (void *addr, unsigned long size, struct malloc_type *type); void *contigmalloc (unsigned long size, struct malloc_type *type, int flags, vm_paddr_t low, vm_paddr_t high, unsigned long alignment, unsigned long boundary); void malloc_init (void *); void malloc_uninit (void *); void kmalloc_raise_limit(struct malloc_type *type, size_t bytes); void kmalloc_create(struct malloc_type **typep, const char *descr); void kmalloc_destroy(struct malloc_type **typep); #ifdef SLAB_DEBUG void *kmalloc_debug (unsigned long size, struct malloc_type *type, int flags, const char *file, int line); void *krealloc_debug (void *addr, unsigned long size, struct malloc_type *type, int flags, const char *file, int line); char *kstrdup_debug (const char *, struct malloc_type *, const char *file, int line); #define kmalloc(size, type, flags) \ kmalloc_debug(size, type, flags, __FILE__, __LINE__) #define krealloc(addr, size, type, flags) \ krealloc_debug(addr, size, type, flags, __FILE__, __LINE__) #define kstrdup(str, type) \ kstrdup_debug(str, type, __FILE__, __LINE__) #else void *kmalloc (unsigned long size, struct malloc_type *type, int flags); void *krealloc (void *addr, unsigned long size, struct malloc_type *type, int flags); char *kstrdup (const char *, struct malloc_type *); #define kmalloc_debug(size, type, flags, file, line) \ kmalloc(size, type, flags) #define krealloc_debug(addr, size, type, flags, file, line) \ krealloc(addr, size, type, flags) #define kstrdup_debug(str, type, file, line) \ kstrdup(str, type) #endif void *kmalloc_cachealign (unsigned long size, struct malloc_type *type, int flags); void kfree (void *addr, struct malloc_type *type); long kmalloc_limit (struct malloc_type *type); #endif /* _KERNEL */ #endif /* !_SYS_MALLOC_H_ */