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 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_SLAB_H_ 32 #define _LINUX_SLAB_H_ 33 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/limits.h> 37 38 #include <linux/compat.h> 39 #include <linux/types.h> 40 #include <linux/gfp.h> 41 #include <linux/llist.h> 42 43 MALLOC_DECLARE(M_KMALLOC); 44 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 #define __kmalloc(...) kmalloc(__VA_ARGS__) 58 59 /* 60 * Prefix some functions with linux_ to avoid namespace conflict 61 * with the OpenSolaris code in the kernel. 62 */ 63 #define kmem_cache linux_kmem_cache 64 #define kmem_cache_create(...) linux_kmem_cache_create(__VA_ARGS__) 65 #define kmem_cache_alloc(...) lkpi_kmem_cache_alloc(__VA_ARGS__) 66 #define kmem_cache_zalloc(...) lkpi_kmem_cache_zalloc(__VA_ARGS__) 67 #define kmem_cache_free(...) lkpi_kmem_cache_free(__VA_ARGS__) 68 #define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__) 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 /* 89 * Critical section-friendly version of kfree(). 90 * Requires knowledge of the allocation size at build time. 91 */ 92 #define kfree_async(ptr) do { \ 93 _Static_assert(sizeof(*(ptr)) >= sizeof(struct llist_node), \ 94 "Size of object to free is unknown or too small"); \ 95 if (curthread->td_critnest != 0) \ 96 linux_kfree_async(ptr); \ 97 else \ 98 kfree(ptr); \ 99 } while (0) 100 101 static inline gfp_t 102 linux_check_m_flags(gfp_t flags) 103 { 104 const gfp_t m = M_NOWAIT | M_WAITOK; 105 106 /* make sure either M_NOWAIT or M_WAITOK is set */ 107 if ((flags & m) == 0) 108 flags |= M_NOWAIT; 109 else if ((flags & m) == m) 110 flags &= ~M_WAITOK; 111 112 /* mask away LinuxKPI specific flags */ 113 return (flags & GFP_NATIVE_MASK); 114 } 115 116 static inline void * 117 kmalloc(size_t size, gfp_t flags) 118 { 119 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 120 } 121 122 static inline void * 123 kmalloc_node(size_t size, gfp_t flags, int node) 124 { 125 return (malloc_domainset(size, M_KMALLOC, 126 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 127 } 128 129 static inline void * 130 kcalloc(size_t n, size_t size, gfp_t flags) 131 { 132 flags |= __GFP_ZERO; 133 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 134 } 135 136 static inline void * 137 kcalloc_node(size_t n, size_t size, gfp_t flags, int node) 138 { 139 flags |= __GFP_ZERO; 140 return (mallocarray_domainset(n, size, M_KMALLOC, 141 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 142 } 143 144 static inline void * 145 __vmalloc(size_t size, gfp_t flags, int other) 146 { 147 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 148 } 149 150 static inline void * 151 __vmalloc_node(size_t size, gfp_t flags, int node) 152 { 153 return (malloc_domainset(size, M_KMALLOC, 154 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 155 } 156 157 static inline void * 158 vmalloc_32(size_t size) 159 { 160 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 161 } 162 163 static inline void * 164 kmalloc_array(size_t n, size_t size, gfp_t flags) 165 { 166 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 167 } 168 169 static inline void * 170 kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node) 171 { 172 return (mallocarray_domainset(n, size, M_KMALLOC, 173 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 174 } 175 176 static inline void * 177 kvmalloc_array(size_t n, size_t size, gfp_t flags) 178 { 179 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 180 } 181 182 static inline void * 183 krealloc(void *ptr, size_t size, gfp_t flags) 184 { 185 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 186 } 187 188 static inline void 189 kfree(const void *ptr) 190 { 191 free(__DECONST(void *, ptr), M_KMALLOC); 192 } 193 194 static __inline void 195 kfree_sensitive(const void *ptr) 196 { 197 zfree(__DECONST(void *, ptr), M_KMALLOC); 198 } 199 200 static inline size_t 201 ksize(const void *ptr) 202 { 203 return (malloc_usable_size(ptr)); 204 } 205 206 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 207 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 208 extern void *lkpi_kmem_cache_alloc(struct linux_kmem_cache *, gfp_t); 209 extern void *lkpi_kmem_cache_zalloc(struct linux_kmem_cache *, gfp_t); 210 extern void lkpi_kmem_cache_free(struct linux_kmem_cache *, void *); 211 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 212 void linux_kfree_async(void *); 213 214 #endif /* _LINUX_SLAB_H_ */ 215