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1da177e4 LT |
1 | /* |
2 | * linux/mm/slab.h | |
3 | * Written by Mark Hemment, 1996. | |
4 | * (markhe@nextd.demon.co.uk) | |
5 | */ | |
6 | ||
7 | #ifndef _LINUX_SLAB_H | |
8 | #define _LINUX_SLAB_H | |
9 | ||
10 | #if defined(__KERNEL__) | |
11 | ||
2109a2d1 | 12 | typedef struct kmem_cache kmem_cache_t; |
1da177e4 LT |
13 | |
14 | #include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */ | |
15 | #include <linux/gfp.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/types.h> | |
18 | #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ | |
19 | #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */ | |
20 | ||
21 | /* flags for kmem_cache_alloc() */ | |
22 | #define SLAB_NOFS GFP_NOFS | |
23 | #define SLAB_NOIO GFP_NOIO | |
24 | #define SLAB_ATOMIC GFP_ATOMIC | |
25 | #define SLAB_USER GFP_USER | |
26 | #define SLAB_KERNEL GFP_KERNEL | |
27 | #define SLAB_DMA GFP_DMA | |
28 | ||
29 | #define SLAB_LEVEL_MASK GFP_LEVEL_MASK | |
30 | ||
31 | #define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */ | |
32 | ||
33 | /* flags to pass to kmem_cache_create(). | |
34 | * The first 3 are only valid when the allocator as been build | |
35 | * SLAB_DEBUG_SUPPORT. | |
36 | */ | |
37 | #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */ | |
38 | #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */ | |
39 | #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */ | |
40 | #define SLAB_POISON 0x00000800UL /* Poison objects */ | |
1da177e4 LT |
41 | #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */ |
42 | #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */ | |
43 | #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */ | |
44 | #define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */ | |
45 | #define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate | |
46 | what is reclaimable later*/ | |
47 | #define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */ | |
48 | #define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */ | |
101a5001 | 49 | #define SLAB_MEM_SPREAD 0x00100000UL /* Spread some memory over cpuset */ |
1da177e4 LT |
50 | |
51 | /* flags passed to a constructor func */ | |
52 | #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */ | |
53 | #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */ | |
54 | #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */ | |
55 | ||
10cef602 MM |
56 | #ifndef CONFIG_SLOB |
57 | ||
1da177e4 LT |
58 | /* prototypes */ |
59 | extern void __init kmem_cache_init(void); | |
60 | ||
61 | extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long, | |
62 | void (*)(void *, kmem_cache_t *, unsigned long), | |
63 | void (*)(void *, kmem_cache_t *, unsigned long)); | |
64 | extern int kmem_cache_destroy(kmem_cache_t *); | |
65 | extern int kmem_cache_shrink(kmem_cache_t *); | |
dd0fc66f | 66 | extern void *kmem_cache_alloc(kmem_cache_t *, gfp_t); |
a8c0f9a4 | 67 | extern void *kmem_cache_zalloc(struct kmem_cache *, gfp_t); |
1da177e4 LT |
68 | extern void kmem_cache_free(kmem_cache_t *, void *); |
69 | extern unsigned int kmem_cache_size(kmem_cache_t *); | |
1944972d | 70 | extern const char *kmem_cache_name(kmem_cache_t *); |
dd0fc66f | 71 | extern kmem_cache_t *kmem_find_general_cachep(size_t size, gfp_t gfpflags); |
1da177e4 LT |
72 | |
73 | /* Size description struct for general caches. */ | |
74 | struct cache_sizes { | |
75 | size_t cs_size; | |
76 | kmem_cache_t *cs_cachep; | |
77 | kmem_cache_t *cs_dmacachep; | |
78 | }; | |
79 | extern struct cache_sizes malloc_sizes[]; | |
7fd6b141 | 80 | |
dd0fc66f | 81 | extern void *__kmalloc(size_t, gfp_t); |
871751e2 AV |
82 | #ifndef CONFIG_DEBUG_SLAB |
83 | #define ____kmalloc(size, flags) __kmalloc(size, flags) | |
7fd6b141 PE |
84 | #else |
85 | extern void *__kmalloc_track_caller(size_t, gfp_t, void*); | |
871751e2 | 86 | #define ____kmalloc(size, flags) \ |
7fd6b141 PE |
87 | __kmalloc_track_caller(size, flags, __builtin_return_address(0)) |
88 | #endif | |
1da177e4 | 89 | |
dd0fc66f | 90 | static inline void *kmalloc(size_t size, gfp_t flags) |
1da177e4 LT |
91 | { |
92 | if (__builtin_constant_p(size)) { | |
93 | int i = 0; | |
94 | #define CACHE(x) \ | |
95 | if (size <= x) \ | |
96 | goto found; \ | |
97 | else \ | |
98 | i++; | |
99 | #include "kmalloc_sizes.h" | |
100 | #undef CACHE | |
101 | { | |
102 | extern void __you_cannot_kmalloc_that_much(void); | |
103 | __you_cannot_kmalloc_that_much(); | |
104 | } | |
105 | found: | |
106 | return kmem_cache_alloc((flags & GFP_DMA) ? | |
107 | malloc_sizes[i].cs_dmacachep : | |
108 | malloc_sizes[i].cs_cachep, flags); | |
109 | } | |
110 | return __kmalloc(size, flags); | |
111 | } | |
112 | ||
dd0fc66f | 113 | extern void *kzalloc(size_t, gfp_t); |
dd392710 PE |
114 | |
115 | /** | |
116 | * kcalloc - allocate memory for an array. The memory is set to zero. | |
117 | * @n: number of elements. | |
118 | * @size: element size. | |
119 | * @flags: the type of memory to allocate. | |
120 | */ | |
dd0fc66f | 121 | static inline void *kcalloc(size_t n, size_t size, gfp_t flags) |
dd392710 | 122 | { |
b50ec7d8 | 123 | if (n != 0 && size > ULONG_MAX / n) |
dd392710 PE |
124 | return NULL; |
125 | return kzalloc(n * size, flags); | |
126 | } | |
127 | ||
1da177e4 LT |
128 | extern void kfree(const void *); |
129 | extern unsigned int ksize(const void *); | |
130 | ||
97e2bde4 | 131 | #ifdef CONFIG_NUMA |
dd0fc66f AV |
132 | extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node); |
133 | extern void *kmalloc_node(size_t size, gfp_t flags, int node); | |
97e2bde4 | 134 | #else |
6daa0e28 | 135 | static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, gfp_t flags, int node) |
97e2bde4 MS |
136 | { |
137 | return kmem_cache_alloc(cachep, flags); | |
138 | } | |
dd0fc66f | 139 | static inline void *kmalloc_node(size_t size, gfp_t flags, int node) |
97e2bde4 MS |
140 | { |
141 | return kmalloc(size, flags); | |
142 | } | |
143 | #endif | |
144 | ||
1da177e4 LT |
145 | extern int FASTCALL(kmem_cache_reap(int)); |
146 | extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr)); | |
147 | ||
10cef602 MM |
148 | #else /* CONFIG_SLOB */ |
149 | ||
150 | /* SLOB allocator routines */ | |
151 | ||
152 | void kmem_cache_init(void); | |
153 | struct kmem_cache *kmem_find_general_cachep(size_t, gfp_t gfpflags); | |
154 | struct kmem_cache *kmem_cache_create(const char *c, size_t, size_t, | |
155 | unsigned long, | |
156 | void (*)(void *, struct kmem_cache *, unsigned long), | |
157 | void (*)(void *, struct kmem_cache *, unsigned long)); | |
158 | int kmem_cache_destroy(struct kmem_cache *c); | |
159 | void *kmem_cache_alloc(struct kmem_cache *c, gfp_t flags); | |
a8c0f9a4 | 160 | void *kmem_cache_zalloc(struct kmem_cache *, gfp_t); |
10cef602 MM |
161 | void kmem_cache_free(struct kmem_cache *c, void *b); |
162 | const char *kmem_cache_name(struct kmem_cache *); | |
163 | void *kmalloc(size_t size, gfp_t flags); | |
164 | void *kzalloc(size_t size, gfp_t flags); | |
165 | void kfree(const void *m); | |
166 | unsigned int ksize(const void *m); | |
167 | unsigned int kmem_cache_size(struct kmem_cache *c); | |
168 | ||
169 | static inline void *kcalloc(size_t n, size_t size, gfp_t flags) | |
170 | { | |
171 | return kzalloc(n * size, flags); | |
172 | } | |
173 | ||
174 | #define kmem_cache_shrink(d) (0) | |
175 | #define kmem_cache_reap(a) | |
176 | #define kmem_ptr_validate(a, b) (0) | |
177 | #define kmem_cache_alloc_node(c, f, n) kmem_cache_alloc(c, f) | |
178 | #define kmalloc_node(s, f, n) kmalloc(s, f) | |
871751e2 | 179 | #define ____kmalloc kmalloc |
10cef602 MM |
180 | |
181 | #endif /* CONFIG_SLOB */ | |
182 | ||
1da177e4 LT |
183 | /* System wide caches */ |
184 | extern kmem_cache_t *vm_area_cachep; | |
185 | extern kmem_cache_t *names_cachep; | |
186 | extern kmem_cache_t *files_cachep; | |
187 | extern kmem_cache_t *filp_cachep; | |
188 | extern kmem_cache_t *fs_cachep; | |
189 | extern kmem_cache_t *signal_cachep; | |
190 | extern kmem_cache_t *sighand_cachep; | |
191 | extern kmem_cache_t *bio_cachep; | |
192 | ||
193 | extern atomic_t slab_reclaim_pages; | |
194 | ||
195 | #endif /* __KERNEL__ */ | |
196 | ||
197 | #endif /* _LINUX_SLAB_H */ |