1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2021 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef _LINUXKPI_LINUX_SLAB_H_ 30 #define _LINUXKPI_LINUX_SLAB_H_ 31 32 #include <sys/types.h> 33 #include <sys/malloc.h> 34 #include <sys/limits.h> 35 36 #include <linux/compat.h> 37 #include <linux/types.h> 38 #include <linux/gfp.h> 39 #include <linux/llist.h> 40 #include <linux/overflow.h> 41 42 MALLOC_DECLARE(M_KMALLOC); 43 44 #define kmalloc(size, flags) lkpi_kmalloc(size, flags) 45 #define kvmalloc(size, flags) kmalloc(size, flags) 46 #define kvzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 47 #define kvcalloc(n, size, flags) kvmalloc_array(n, size, (flags) | __GFP_ZERO) 48 #define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 49 #define kzalloc_node(size, flags, node) kmalloc_node(size, (flags) | __GFP_ZERO, node) 50 #define kfree_const(ptr) kfree(ptr) 51 #define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0) 52 #define vfree(arg) kfree(arg) 53 #define kvfree(arg) kfree(arg) 54 #define vmalloc_node(size, node) __vmalloc_node(size, GFP_KERNEL, node) 55 #define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0) 56 #define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0) 57 58 /* 59 * Prefix some functions with linux_ to avoid namespace conflict 60 * with the OpenSolaris code in the kernel. 61 */ 62 #define kmem_cache linux_kmem_cache 63 #define kmem_cache_create(...) linux_kmem_cache_create(__VA_ARGS__) 64 #define kmem_cache_alloc(...) lkpi_kmem_cache_alloc(__VA_ARGS__) 65 #define kmem_cache_zalloc(...) lkpi_kmem_cache_zalloc(__VA_ARGS__) 66 #define kmem_cache_free(...) lkpi_kmem_cache_free(__VA_ARGS__) 67 #define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__) 68 #define kmem_cache_shrink(x) (0) 69 70 #define KMEM_CACHE(__struct, flags) \ 71 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \ 72 __alignof(struct __struct), (flags), NULL) 73 74 typedef void linux_kmem_ctor_t (void *); 75 76 struct linux_kmem_cache; 77 78 #define SLAB_HWCACHE_ALIGN (1 << 0) 79 #define SLAB_TYPESAFE_BY_RCU (1 << 1) 80 #define SLAB_RECLAIM_ACCOUNT (1 << 2) 81 82 #define SLAB_DESTROY_BY_RCU \ 83 SLAB_TYPESAFE_BY_RCU 84 85 #define ARCH_KMALLOC_MINALIGN \ 86 __alignof(unsigned long long) 87 88 /* drm-kmod 5.4 compat */ 89 #define kfree_async(ptr) kfree(ptr); 90 91 #define ZERO_SIZE_PTR ((void *)16) 92 #define ZERO_OR_NULL_PTR(x) ((x) == NULL || (x) == ZERO_SIZE_PTR) 93 94 extern void *lkpi_kmalloc(size_t size, gfp_t flags); 95 96 static inline gfp_t 97 linux_check_m_flags(gfp_t flags) 98 { 99 const gfp_t m = M_NOWAIT | M_WAITOK; 100 101 /* make sure either M_NOWAIT or M_WAITOK is set */ 102 if ((flags & m) == 0) 103 flags |= M_NOWAIT; 104 else if ((flags & m) == m) 105 flags &= ~M_WAITOK; 106 107 /* mask away LinuxKPI specific flags */ 108 return (flags & GFP_NATIVE_MASK); 109 } 110 111 static inline void * 112 __kmalloc(size_t size, gfp_t flags) 113 { 114 return (malloc(MAX(size, sizeof(struct llist_node)), M_KMALLOC, 115 linux_check_m_flags(flags))); 116 } 117 118 static inline void * 119 kmalloc_node(size_t size, gfp_t flags, int node) 120 { 121 return (malloc_domainset(size, M_KMALLOC, 122 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 123 } 124 125 static inline void * 126 kcalloc(size_t n, size_t size, gfp_t flags) 127 { 128 flags |= __GFP_ZERO; 129 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 130 } 131 132 static inline void * 133 kcalloc_node(size_t n, size_t size, gfp_t flags, int node) 134 { 135 flags |= __GFP_ZERO; 136 return (mallocarray_domainset(n, size, M_KMALLOC, 137 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 138 } 139 140 static inline void * 141 __vmalloc(size_t size, gfp_t flags, int other) 142 { 143 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 144 } 145 146 static inline void * 147 __vmalloc_node(size_t size, gfp_t flags, int node) 148 { 149 return (malloc_domainset(size, M_KMALLOC, 150 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 151 } 152 153 static inline void * 154 vmalloc_32(size_t size) 155 { 156 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 157 } 158 159 static inline void * 160 kmalloc_array(size_t n, size_t size, gfp_t flags) 161 { 162 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 163 } 164 165 static inline void * 166 kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node) 167 { 168 return (mallocarray_domainset(n, size, M_KMALLOC, 169 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 170 } 171 172 static inline void * 173 kvmalloc_array(size_t n, size_t size, gfp_t flags) 174 { 175 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 176 } 177 178 static inline void * 179 krealloc(void *ptr, size_t size, gfp_t flags) 180 { 181 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 182 } 183 184 static inline void * 185 krealloc_array(void *ptr, size_t n, size_t size, gfp_t flags) 186 { 187 if (WOULD_OVERFLOW(n, size)) { 188 return NULL; 189 } 190 191 return (realloc(ptr, n * size, M_KMALLOC, linux_check_m_flags(flags))); 192 } 193 194 extern void linux_kfree_async(void *); 195 196 static inline void 197 kfree(const void *ptr) 198 { 199 if (ZERO_OR_NULL_PTR(ptr)) 200 return; 201 202 if (curthread->td_critnest != 0) 203 linux_kfree_async(__DECONST(void *, ptr)); 204 else 205 free(__DECONST(void *, ptr), M_KMALLOC); 206 } 207 208 static __inline void 209 kfree_sensitive(const void *ptr) 210 { 211 if (ZERO_OR_NULL_PTR(ptr)) 212 return; 213 214 zfree(__DECONST(void *, ptr), M_KMALLOC); 215 } 216 217 static inline void * 218 kvrealloc(const void *ptr, size_t oldsize, size_t newsize, gfp_t flags) 219 { 220 void *newptr; 221 222 if (newsize <= oldsize) 223 return (__DECONST(void *, ptr)); 224 225 newptr = kvmalloc(newsize, flags); 226 if (newptr != NULL) { 227 memcpy(newptr, ptr, oldsize); 228 kvfree(ptr); 229 } 230 231 return (newptr); 232 } 233 234 static inline size_t 235 ksize(const void *ptr) 236 { 237 return (malloc_usable_size(ptr)); 238 } 239 240 static inline size_t 241 kmalloc_size_roundup(size_t size) 242 { 243 if (unlikely(size == 0 || size == SIZE_MAX)) 244 return (size); 245 return (malloc_size(size)); 246 } 247 248 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 249 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 250 extern void *lkpi_kmem_cache_alloc(struct linux_kmem_cache *, gfp_t); 251 extern void *lkpi_kmem_cache_zalloc(struct linux_kmem_cache *, gfp_t); 252 extern void lkpi_kmem_cache_free(struct linux_kmem_cache *, void *); 253 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 254 255 #endif /* _LINUXKPI_LINUX_SLAB_H_ */ 256