aboutsummaryrefslogtreecommitdiff
path: root/sys/compat/linuxkpi/common/include/linux/slab.h
blob: 56bb08c185e2c9d68ca336d813dfd62b60fc2ae4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
/*-
 * Copyright (c) 2010 Isilon Systems, Inc.
 * Copyright (c) 2010 iX Systems, Inc.
 * Copyright (c) 2010 Panasas, Inc.
 * Copyright (c) 2013-2021 Mellanox Technologies, Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */
#ifndef	_LINUX_SLAB_H_
#define	_LINUX_SLAB_H_

#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/limits.h>

#include <linux/compat.h>
#include <linux/types.h>
#include <linux/gfp.h>
#include <linux/llist.h>
#include <linux/overflow.h>

MALLOC_DECLARE(M_KMALLOC);

#define	kvmalloc(size, flags)		kmalloc(size, flags)
#define	kvzalloc(size, flags)		kmalloc(size, (flags) | __GFP_ZERO)
#define	kvcalloc(n, size, flags)	kvmalloc_array(n, size, (flags) | __GFP_ZERO)
#define	kzalloc(size, flags)		kmalloc(size, (flags) | __GFP_ZERO)
#define	kzalloc_node(size, flags, node)	kmalloc_node(size, (flags) | __GFP_ZERO, node)
#define	kfree_const(ptr)		kfree(ptr)
#define	vzalloc(size)			__vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0)
#define	vfree(arg)			kfree(arg)
#define	kvfree(arg)			kfree(arg)
#define	vmalloc_node(size, node)	__vmalloc_node(size, GFP_KERNEL, node)
#define	vmalloc_user(size)		__vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0)
#define	vmalloc(size)			__vmalloc(size, GFP_KERNEL, 0)
#define	__kmalloc(...)			kmalloc(__VA_ARGS__)

/*
 * Prefix some functions with linux_ to avoid namespace conflict
 * with the OpenSolaris code in the kernel.
 */
#define	kmem_cache		linux_kmem_cache
#define	kmem_cache_create(...)	linux_kmem_cache_create(__VA_ARGS__)
#define	kmem_cache_alloc(...)	lkpi_kmem_cache_alloc(__VA_ARGS__)
#define	kmem_cache_zalloc(...)	lkpi_kmem_cache_zalloc(__VA_ARGS__)
#define	kmem_cache_free(...)	lkpi_kmem_cache_free(__VA_ARGS__)
#define	kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__)

#define	KMEM_CACHE(__struct, flags)					\
	linux_kmem_cache_create(#__struct, sizeof(struct __struct),	\
	__alignof(struct __struct), (flags), NULL)

typedef void linux_kmem_ctor_t (void *);

struct linux_kmem_cache;

#define	SLAB_HWCACHE_ALIGN	(1 << 0)
#define	SLAB_TYPESAFE_BY_RCU	(1 << 1)
#define	SLAB_RECLAIM_ACCOUNT	(1 << 2)

#define	SLAB_DESTROY_BY_RCU \
	SLAB_TYPESAFE_BY_RCU

#define	ARCH_KMALLOC_MINALIGN \
	__alignof(unsigned long long)

/*
 * Critical section-friendly version of kfree().
 * Requires knowledge of the allocation size at build time.
 */
#define kfree_async(ptr)	do {					\
	_Static_assert(sizeof(*(ptr)) >= sizeof(struct llist_node),	\
	    "Size of object to free is unknown or too small");		\
	if (curthread->td_critnest != 0)				\
		linux_kfree_async(ptr);					\
	else								\
		kfree(ptr);						\
} while (0)

static inline gfp_t
linux_check_m_flags(gfp_t flags)
{
	const gfp_t m = M_NOWAIT | M_WAITOK;

	/* make sure either M_NOWAIT or M_WAITOK is set */
	if ((flags & m) == 0)
		flags |= M_NOWAIT;
	else if ((flags & m) == m)
		flags &= ~M_WAITOK;

	/* mask away LinuxKPI specific flags */
	return (flags & GFP_NATIVE_MASK);
}

static inline void *
kmalloc(size_t size, gfp_t flags)
{
	return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
}

static inline void *
kmalloc_node(size_t size, gfp_t flags, int node)
{
	return (malloc_domainset(size, M_KMALLOC,
	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
}

static inline void *
kcalloc(size_t n, size_t size, gfp_t flags)
{
	flags |= __GFP_ZERO;
	return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
}

static inline void *
kcalloc_node(size_t n, size_t size, gfp_t flags, int node)
{
	flags |= __GFP_ZERO;
	return (mallocarray_domainset(n, size, M_KMALLOC,
	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
}

static inline void *
__vmalloc(size_t size, gfp_t flags, int other)
{
	return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
}

static inline void *
__vmalloc_node(size_t size, gfp_t flags, int node)
{
	return (malloc_domainset(size, M_KMALLOC,
	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
}

static inline void *
vmalloc_32(size_t size)
{
	return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1));
}

static inline void *
kmalloc_array(size_t n, size_t size, gfp_t flags)
{
	return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
}

static inline void *
kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node)
{
	return (mallocarray_domainset(n, size, M_KMALLOC,
	    linux_get_vm_domain_set(node), linux_check_m_flags(flags)));
}

static inline void *
kvmalloc_array(size_t n, size_t size, gfp_t flags)
{
	return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
}

static inline void *
krealloc(void *ptr, size_t size, gfp_t flags)
{
	return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags)));
}

static inline void
kfree(const void *ptr)
{
	free(__DECONST(void *, ptr), M_KMALLOC);
}

static __inline void
kfree_sensitive(const void *ptr)
{
	zfree(__DECONST(void *, ptr), M_KMALLOC);
}

static inline size_t
ksize(const void *ptr)
{
	return (malloc_usable_size(ptr));
}

extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name,
    size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor);
extern void *lkpi_kmem_cache_alloc(struct linux_kmem_cache *, gfp_t);
extern void *lkpi_kmem_cache_zalloc(struct linux_kmem_cache *, gfp_t);
extern void lkpi_kmem_cache_free(struct linux_kmem_cache *, void *);
extern void linux_kmem_cache_destroy(struct linux_kmem_cache *);
void linux_kfree_async(void *);

#endif					/* _LINUX_SLAB_H_ */