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.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
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.
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.
31 #ifndef _LINUX_SLAB_H_
32 #define _LINUX_SLAB_H_
34 #include <sys/types.h>
35 #include <sys/malloc.h>
36 #include <sys/limits.h>
38 #include <linux/compat.h>
39 #include <linux/types.h>
40 #include <linux/gfp.h>
41 #include <linux/llist.h>
43 MALLOC_DECLARE(M_KMALLOC);
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__)
60 * Prefix some functions with linux_ to avoid namespace conflict
61 * with the OpenSolaris code in the kernel.
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__)
70 #define KMEM_CACHE(__struct, flags) \
71 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \
72 __alignof(struct __struct), (flags), NULL)
74 typedef void linux_kmem_ctor_t (void *);
76 struct linux_kmem_cache;
78 #define SLAB_HWCACHE_ALIGN (1 << 0)
79 #define SLAB_TYPESAFE_BY_RCU (1 << 1)
80 #define SLAB_RECLAIM_ACCOUNT (1 << 2)
82 #define SLAB_DESTROY_BY_RCU \
85 #define ARCH_KMALLOC_MINALIGN \
86 __alignof(unsigned long long)
89 * Critical section-friendly version of kfree().
90 * Requires knowledge of the allocation size at build time.
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); \
102 linux_check_m_flags(gfp_t flags)
104 const gfp_t m = M_NOWAIT | M_WAITOK;
106 /* make sure either M_NOWAIT or M_WAITOK is set */
107 if ((flags & m) == 0)
109 else if ((flags & m) == m)
112 /* mask away LinuxKPI specific flags */
113 return (flags & GFP_NATIVE_MASK);
117 kmalloc(size_t size, gfp_t flags)
119 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
123 kmalloc_node(size_t size, gfp_t flags, int node)
125 return (malloc_domainset(size, M_KMALLOC,
126 linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
130 kcalloc(size_t n, size_t size, gfp_t flags)
133 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
137 kcalloc_node(size_t n, size_t size, gfp_t flags, int node)
140 return (mallocarray_domainset(n, size, M_KMALLOC,
141 linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
145 __vmalloc(size_t size, gfp_t flags, int other)
147 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
151 __vmalloc_node(size_t size, gfp_t flags, int node)
153 return (malloc_domainset(size, M_KMALLOC,
154 linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
158 vmalloc_32(size_t size)
160 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1));
164 kmalloc_array(size_t n, size_t size, gfp_t flags)
166 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
170 kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node)
172 return (mallocarray_domainset(n, size, M_KMALLOC,
173 linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
177 kvmalloc_array(size_t n, size_t size, gfp_t flags)
179 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
183 krealloc(void *ptr, size_t size, gfp_t flags)
185 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags)));
189 kfree(const void *ptr)
191 free(__DECONST(void *, ptr), M_KMALLOC);
195 kfree_sensitive(const void *ptr)
197 zfree(__DECONST(void *, ptr), M_KMALLOC);
201 ksize(const void *ptr)
203 return (malloc_usable_size(ptr));
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 *);
214 #endif /* _LINUX_SLAB_H_ */