Commit | Line | Data |
---|---|---|
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 | 13 | |
1da177e4 LT |
14 | #include <linux/gfp.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/types.h> | |
17 | #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ | |
18 | #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */ | |
19 | ||
20 | /* flags for kmem_cache_alloc() */ | |
21 | #define SLAB_NOFS GFP_NOFS | |
22 | #define SLAB_NOIO GFP_NOIO | |
23 | #define SLAB_ATOMIC GFP_ATOMIC | |
24 | #define SLAB_USER GFP_USER | |
25 | #define SLAB_KERNEL GFP_KERNEL | |
26 | #define SLAB_DMA GFP_DMA | |
27 | ||
28 | #define SLAB_LEVEL_MASK GFP_LEVEL_MASK | |
29 | ||
30 | #define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */ | |
31 | ||
32 | /* flags to pass to kmem_cache_create(). | |
33 | * The first 3 are only valid when the allocator as been build | |
34 | * SLAB_DEBUG_SUPPORT. | |
35 | */ | |
36 | #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */ | |
37 | #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */ | |
38 | #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */ | |
39 | #define SLAB_POISON 0x00000800UL /* Poison objects */ | |
1da177e4 LT |
40 | #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */ |
41 | #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */ | |
42 | #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */ | |
43 | #define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */ | |
44 | #define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate | |
45 | what is reclaimable later*/ | |
46 | #define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */ | |
47 | #define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */ | |
101a5001 | 48 | #define SLAB_MEM_SPREAD 0x00100000UL /* Spread some memory over cpuset */ |
1da177e4 LT |
49 | |
50 | /* flags passed to a constructor func */ | |
51 | #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */ | |
52 | #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */ | |
53 | #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */ | |
54 | ||
10cef602 MM |
55 | #ifndef CONFIG_SLOB |
56 | ||
1da177e4 LT |
57 | /* prototypes */ |
58 | extern void __init kmem_cache_init(void); | |
59 | ||
60 | extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long, | |
61 | void (*)(void *, kmem_cache_t *, unsigned long), | |
62 | void (*)(void *, kmem_cache_t *, unsigned long)); | |
63 | extern int kmem_cache_destroy(kmem_cache_t *); | |
64 | extern int kmem_cache_shrink(kmem_cache_t *); | |
dd0fc66f | 65 | extern void *kmem_cache_alloc(kmem_cache_t *, gfp_t); |
a8c0f9a4 | 66 | extern void *kmem_cache_zalloc(struct kmem_cache *, gfp_t); |
1da177e4 LT |
67 | extern void kmem_cache_free(kmem_cache_t *, void *); |
68 | extern unsigned int kmem_cache_size(kmem_cache_t *); | |
1944972d | 69 | extern const char *kmem_cache_name(kmem_cache_t *); |
dd0fc66f | 70 | extern kmem_cache_t *kmem_find_general_cachep(size_t size, gfp_t gfpflags); |
1da177e4 LT |
71 | |
72 | /* Size description struct for general caches. */ | |
73 | struct cache_sizes { | |
74 | size_t cs_size; | |
75 | kmem_cache_t *cs_cachep; | |
76 | kmem_cache_t *cs_dmacachep; | |
77 | }; | |
78 | extern struct cache_sizes malloc_sizes[]; | |
7fd6b141 | 79 | |
dd0fc66f | 80 | extern void *__kmalloc(size_t, gfp_t); |
871751e2 AV |
81 | #ifndef CONFIG_DEBUG_SLAB |
82 | #define ____kmalloc(size, flags) __kmalloc(size, flags) | |
7fd6b141 PE |
83 | #else |
84 | extern void *__kmalloc_track_caller(size_t, gfp_t, void*); | |
871751e2 | 85 | #define ____kmalloc(size, flags) \ |
7fd6b141 PE |
86 | __kmalloc_track_caller(size, flags, __builtin_return_address(0)) |
87 | #endif | |
1da177e4 | 88 | |
dd0fc66f | 89 | static inline void *kmalloc(size_t size, gfp_t flags) |
1da177e4 LT |
90 | { |
91 | if (__builtin_constant_p(size)) { | |
92 | int i = 0; | |
93 | #define CACHE(x) \ | |
94 | if (size <= x) \ | |
95 | goto found; \ | |
96 | else \ | |
97 | i++; | |
98 | #include "kmalloc_sizes.h" | |
99 | #undef CACHE | |
100 | { | |
101 | extern void __you_cannot_kmalloc_that_much(void); | |
102 | __you_cannot_kmalloc_that_much(); | |
103 | } | |
104 | found: | |
105 | return kmem_cache_alloc((flags & GFP_DMA) ? | |
106 | malloc_sizes[i].cs_dmacachep : | |
107 | malloc_sizes[i].cs_cachep, flags); | |
108 | } | |
109 | return __kmalloc(size, flags); | |
110 | } | |
111 | ||
40c07ae8 PE |
112 | extern void *__kzalloc(size_t, gfp_t); |
113 | ||
114 | static inline void *kzalloc(size_t size, gfp_t flags) | |
115 | { | |
116 | if (__builtin_constant_p(size)) { | |
117 | int i = 0; | |
118 | #define CACHE(x) \ | |
119 | if (size <= x) \ | |
120 | goto found; \ | |
121 | else \ | |
122 | i++; | |
123 | #include "kmalloc_sizes.h" | |
124 | #undef CACHE | |
125 | { | |
126 | extern void __you_cannot_kzalloc_that_much(void); | |
127 | __you_cannot_kzalloc_that_much(); | |
128 | } | |
129 | found: | |
130 | return kmem_cache_zalloc((flags & GFP_DMA) ? | |
131 | malloc_sizes[i].cs_dmacachep : | |
132 | malloc_sizes[i].cs_cachep, flags); | |
133 | } | |
134 | return __kzalloc(size, flags); | |
135 | } | |
dd392710 PE |
136 | |
137 | /** | |
138 | * kcalloc - allocate memory for an array. The memory is set to zero. | |
139 | * @n: number of elements. | |
140 | * @size: element size. | |
141 | * @flags: the type of memory to allocate. | |
142 | */ | |
dd0fc66f | 143 | static inline void *kcalloc(size_t n, size_t size, gfp_t flags) |
dd392710 | 144 | { |
b50ec7d8 | 145 | if (n != 0 && size > ULONG_MAX / n) |
dd392710 PE |
146 | return NULL; |
147 | return kzalloc(n * size, flags); | |
148 | } | |
149 | ||
1da177e4 LT |
150 | extern void kfree(const void *); |
151 | extern unsigned int ksize(const void *); | |
152 | ||
97e2bde4 | 153 | #ifdef CONFIG_NUMA |
dd0fc66f AV |
154 | extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node); |
155 | extern void *kmalloc_node(size_t size, gfp_t flags, int node); | |
97e2bde4 | 156 | #else |
6daa0e28 | 157 | static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, gfp_t flags, int node) |
97e2bde4 MS |
158 | { |
159 | return kmem_cache_alloc(cachep, flags); | |
160 | } | |
dd0fc66f | 161 | static inline void *kmalloc_node(size_t size, gfp_t flags, int node) |
97e2bde4 MS |
162 | { |
163 | return kmalloc(size, flags); | |
164 | } | |
165 | #endif | |
166 | ||
1da177e4 LT |
167 | extern int FASTCALL(kmem_cache_reap(int)); |
168 | extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr)); | |
169 | ||
10cef602 MM |
170 | #else /* CONFIG_SLOB */ |
171 | ||
172 | /* SLOB allocator routines */ | |
173 | ||
174 | void kmem_cache_init(void); | |
175 | struct kmem_cache *kmem_find_general_cachep(size_t, gfp_t gfpflags); | |
176 | struct kmem_cache *kmem_cache_create(const char *c, size_t, size_t, | |
177 | unsigned long, | |
178 | void (*)(void *, struct kmem_cache *, unsigned long), | |
179 | void (*)(void *, struct kmem_cache *, unsigned long)); | |
180 | int kmem_cache_destroy(struct kmem_cache *c); | |
181 | void *kmem_cache_alloc(struct kmem_cache *c, gfp_t flags); | |
a8c0f9a4 | 182 | void *kmem_cache_zalloc(struct kmem_cache *, gfp_t); |
10cef602 MM |
183 | void kmem_cache_free(struct kmem_cache *c, void *b); |
184 | const char *kmem_cache_name(struct kmem_cache *); | |
185 | void *kmalloc(size_t size, gfp_t flags); | |
40c07ae8 | 186 | void *__kzalloc(size_t size, gfp_t flags); |
10cef602 MM |
187 | void kfree(const void *m); |
188 | unsigned int ksize(const void *m); | |
189 | unsigned int kmem_cache_size(struct kmem_cache *c); | |
190 | ||
191 | static inline void *kcalloc(size_t n, size_t size, gfp_t flags) | |
192 | { | |
40c07ae8 | 193 | return __kzalloc(n * size, flags); |
10cef602 MM |
194 | } |
195 | ||
196 | #define kmem_cache_shrink(d) (0) | |
197 | #define kmem_cache_reap(a) | |
198 | #define kmem_ptr_validate(a, b) (0) | |
199 | #define kmem_cache_alloc_node(c, f, n) kmem_cache_alloc(c, f) | |
200 | #define kmalloc_node(s, f, n) kmalloc(s, f) | |
40c07ae8 | 201 | #define kzalloc(s, f) __kzalloc(s, f) |
871751e2 | 202 | #define ____kmalloc kmalloc |
10cef602 MM |
203 | |
204 | #endif /* CONFIG_SLOB */ | |
205 | ||
1da177e4 LT |
206 | /* System wide caches */ |
207 | extern kmem_cache_t *vm_area_cachep; | |
208 | extern kmem_cache_t *names_cachep; | |
209 | extern kmem_cache_t *files_cachep; | |
210 | extern kmem_cache_t *filp_cachep; | |
211 | extern kmem_cache_t *fs_cachep; | |
1da177e4 LT |
212 | extern kmem_cache_t *sighand_cachep; |
213 | extern kmem_cache_t *bio_cachep; | |
214 | ||
215 | extern atomic_t slab_reclaim_pages; | |
216 | ||
217 | #endif /* __KERNEL__ */ | |
218 | ||
219 | #endif /* _LINUX_SLAB_H */ |