diff options
Diffstat (limited to 'include/linux/slab.h')
| -rw-r--r-- | include/linux/slab.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h new file mode 100644 index 00000000000..3e3c3ab8ff9 --- /dev/null +++ b/include/linux/slab.h @@ -0,0 +1,129 @@ +/* + * linux/mm/slab.h + * Written by Mark Hemment, 1996. + * (markhe@nextd.demon.co.uk) + */ + +#ifndef _LINUX_SLAB_H +#define _LINUX_SLAB_H + +#if defined(__KERNEL__) + +typedef struct kmem_cache_s kmem_cache_t; + +#include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */ +#include <linux/gfp.h> +#include <linux/init.h> +#include <linux/types.h> +#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ +#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */ + +/* flags for kmem_cache_alloc() */ +#define SLAB_NOFS GFP_NOFS +#define SLAB_NOIO GFP_NOIO +#define SLAB_ATOMIC GFP_ATOMIC +#define SLAB_USER GFP_USER +#define SLAB_KERNEL GFP_KERNEL +#define SLAB_DMA GFP_DMA + +#define SLAB_LEVEL_MASK GFP_LEVEL_MASK + +#define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */ + +/* flags to pass to kmem_cache_create(). + * The first 3 are only valid when the allocator as been build + * SLAB_DEBUG_SUPPORT. + */ +#define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */ +#define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */ +#define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */ +#define SLAB_POISON 0x00000800UL /* Poison objects */ +#define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */ +#define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */ +#define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */ +#define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */ +#define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */ +#define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate + what is reclaimable later*/ +#define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */ +#define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */ + +/* flags passed to a constructor func */ +#define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */ +#define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */ +#define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */ + +/* prototypes */ +extern void __init kmem_cache_init(void); + +extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long, + void (*)(void *, kmem_cache_t *, unsigned long), + void (*)(void *, kmem_cache_t *, unsigned long)); +extern int kmem_cache_destroy(kmem_cache_t *); +extern int kmem_cache_shrink(kmem_cache_t *); +extern void *kmem_cache_alloc(kmem_cache_t *, unsigned int __nocast); +#ifdef CONFIG_NUMA +extern void *kmem_cache_alloc_node(kmem_cache_t *, int); +#else +static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, int node) +{ + return kmem_cache_alloc(cachep, GFP_KERNEL); +} +#endif +extern void kmem_cache_free(kmem_cache_t *, void *); +extern unsigned int kmem_cache_size(kmem_cache_t *); + +/* Size description struct for general caches. */ +struct cache_sizes { + size_t cs_size; + kmem_cache_t *cs_cachep; + kmem_cache_t *cs_dmacachep; +}; +extern struct cache_sizes malloc_sizes[]; +extern void *__kmalloc(size_t, unsigned int __nocast); + +static inline void *kmalloc(size_t size, unsigned int __nocast flags) +{ + if (__builtin_constant_p(size)) { + int i = 0; +#define CACHE(x) \ + if (size <= x) \ + goto found; \ + else \ + i++; +#include "kmalloc_sizes.h" +#undef CACHE + { + extern void __you_cannot_kmalloc_that_much(void); + __you_cannot_kmalloc_that_much(); + } +found: + return kmem_cache_alloc((flags & GFP_DMA) ? + malloc_sizes[i].cs_dmacachep : + malloc_sizes[i].cs_cachep, flags); + } + return __kmalloc(size, flags); +} + +extern void *kcalloc(size_t, size_t, unsigned int __nocast); +extern void kfree(const void *); +extern unsigned int ksize(const void *); + +extern int FASTCALL(kmem_cache_reap(int)); +extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr)); + +/* System wide caches */ +extern kmem_cache_t *vm_area_cachep; +extern kmem_cache_t *names_cachep; +extern kmem_cache_t *files_cachep; +extern kmem_cache_t *filp_cachep; +extern kmem_cache_t *fs_cachep; +extern kmem_cache_t *signal_cachep; +extern kmem_cache_t *sighand_cachep; +extern kmem_cache_t *bio_cachep; + +extern atomic_t slab_reclaim_pages; + +#endif /* __KERNEL__ */ + +#endif /* _LINUX_SLAB_H */ |