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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * linux/mm/slab.h |
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| 3 | * Written by Mark Hemment, 1996. |
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| 4 | * (markhe@nextd.demon.co.uk) |
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| 5 | */ |
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| 6 | |||
| 7 | #if !defined(_LINUX_SLAB_H) |
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| 8 | #define _LINUX_SLAB_H |
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| 9 | |||
| 10 | #if defined(__KERNEL__) |
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| 11 | |||
| 12 | typedef struct kmem_cache_s kmem_cache_t; |
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| 13 | |||
| 14 | #include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */ |
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| 15 | #include <linux/gfp.h> |
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| 16 | #include <linux/types.h> |
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| 17 | #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ |
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| 18 | #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */ |
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| 19 | |||
| 20 | /* flags for kmem_cache_alloc() */ |
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| 21 | #define SLAB_NOFS GFP_NOFS |
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| 22 | #define SLAB_NOIO GFP_NOIO |
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| 23 | #define SLAB_ATOMIC GFP_ATOMIC |
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| 24 | #define SLAB_USER GFP_USER |
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| 25 | #define SLAB_KERNEL GFP_KERNEL |
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| 26 | #define SLAB_DMA GFP_DMA |
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| 27 | |||
| 28 | #define SLAB_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS|\ |
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| 29 | __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT|\ |
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| 30 | __GFP_NOFAIL|__GFP_NORETRY) |
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| 31 | |||
| 32 | #define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */ |
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| 33 | |||
| 34 | /* flags to pass to kmem_cache_create(). |
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| 35 | * The first 3 are only valid when the allocator as been build |
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| 36 | * SLAB_DEBUG_SUPPORT. |
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| 37 | */ |
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| 38 | #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */ |
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| 39 | #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */ |
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| 40 | #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */ |
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| 41 | #define SLAB_POISON 0x00000800UL /* Poison objects */ |
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| 42 | #define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */ |
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| 43 | #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */ |
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| 44 | #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */ |
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| 45 | #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */ |
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| 46 | #define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */ |
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| 47 | #define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate |
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| 48 | what is reclaimable later*/ |
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| 49 | |||
| 50 | /* flags passed to a constructor func */ |
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| 51 | #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */ |
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| 52 | #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */ |
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| 53 | #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */ |
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| 54 | |||
| 55 | /* prototypes */ |
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| 56 | extern void kmem_cache_init(void); |
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| 57 | |||
| 58 | extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags); |
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| 59 | extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long, |
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| 60 | void (*)(void *, kmem_cache_t *, unsigned long), |
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| 61 | void (*)(void *, kmem_cache_t *, unsigned long)); |
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| 62 | extern int kmem_cache_destroy(kmem_cache_t *); |
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| 63 | extern int kmem_cache_shrink(kmem_cache_t *); |
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| 64 | extern void *kmem_cache_alloc(kmem_cache_t *, int); |
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| 65 | extern void kmem_cache_free(kmem_cache_t *, void *); |
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| 66 | extern unsigned int kmem_cache_size(kmem_cache_t *); |
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| 67 | |||
| 68 | /* Size description struct for general caches. */ |
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| 69 | struct cache_sizes { |
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| 70 | size_t cs_size; |
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| 71 | kmem_cache_t *cs_cachep; |
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| 72 | kmem_cache_t *cs_dmacachep; |
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| 73 | }; |
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| 74 | extern struct cache_sizes malloc_sizes[]; |
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| 75 | extern void *__kmalloc(size_t, int); |
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| 76 | |||
| 77 | static inline void *kmalloc(size_t size, int flags) |
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| 78 | { |
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| 79 | if (__builtin_constant_p(size)) { |
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| 80 | int i = 0; |
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| 81 | #define CACHE(x) \ |
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| 82 | if (size <= x) \ |
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| 83 | goto found; \ |
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| 84 | else \ |
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| 85 | i++; |
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| 86 | #include "kmalloc_sizes.h" |
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| 87 | #undef CACHE |
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| 88 | { |
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| 89 | extern void __you_cannot_kmalloc_that_much(void); |
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| 90 | __you_cannot_kmalloc_that_much(); |
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| 91 | } |
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| 92 | found: |
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| 93 | return kmem_cache_alloc((flags & GFP_DMA) ? |
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| 94 | malloc_sizes[i].cs_dmacachep : |
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| 95 | malloc_sizes[i].cs_cachep, flags); |
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| 96 | } |
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| 97 | return __kmalloc(size, flags); |
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| 98 | } |
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| 99 | |||
| 100 | extern void kfree(const void *); |
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| 101 | extern unsigned int ksize(const void *); |
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| 102 | |||
| 103 | extern int FASTCALL(kmem_cache_reap(int)); |
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| 104 | |||
| 105 | /* System wide caches */ |
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| 106 | extern kmem_cache_t *vm_area_cachep; |
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| 107 | extern kmem_cache_t *mm_cachep; |
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| 108 | extern kmem_cache_t *names_cachep; |
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| 109 | extern kmem_cache_t *files_cachep; |
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| 110 | extern kmem_cache_t *filp_cachep; |
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| 111 | extern kmem_cache_t *dquot_cachep; |
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| 112 | extern kmem_cache_t *fs_cachep; |
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| 113 | extern kmem_cache_t *signal_cachep; |
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| 114 | extern kmem_cache_t *sighand_cachep; |
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| 115 | extern kmem_cache_t *bio_cachep; |
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| 116 | |||
| 117 | void ptrinfo(unsigned long addr); |
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| 118 | |||
| 119 | extern atomic_t slab_reclaim_pages; |
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| 120 | |||
| 121 | #endif /* __KERNEL__ */ |
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| 122 | |||
| 123 | #endif /* _LINUX_SLAB_H */ |