xref: /linux/include/linux/types.h (revision 06d07429858317ded2db7986113a9e0129cd599b)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_TYPES_H
3 #define _LINUX_TYPES_H
4 
5 #define __EXPORTED_HEADERS__
6 #include <uapi/linux/types.h>
7 
8 #ifndef __ASSEMBLY__
9 
10 #define DECLARE_BITMAP(name,bits) \
11 	unsigned long name[BITS_TO_LONGS(bits)]
12 
13 #ifdef __SIZEOF_INT128__
14 typedef __s128 s128;
15 typedef __u128 u128;
16 #endif
17 
18 typedef u32 __kernel_dev_t;
19 
20 typedef __kernel_fd_set		fd_set;
21 typedef __kernel_dev_t		dev_t;
22 typedef __kernel_ulong_t	ino_t;
23 typedef __kernel_mode_t		mode_t;
24 typedef unsigned short		umode_t;
25 typedef u32			nlink_t;
26 typedef __kernel_off_t		off_t;
27 typedef __kernel_pid_t		pid_t;
28 typedef __kernel_daddr_t	daddr_t;
29 typedef __kernel_key_t		key_t;
30 typedef __kernel_suseconds_t	suseconds_t;
31 typedef __kernel_timer_t	timer_t;
32 typedef __kernel_clockid_t	clockid_t;
33 typedef __kernel_mqd_t		mqd_t;
34 
35 typedef _Bool			bool;
36 
37 typedef __kernel_uid32_t	uid_t;
38 typedef __kernel_gid32_t	gid_t;
39 typedef __kernel_uid16_t        uid16_t;
40 typedef __kernel_gid16_t        gid16_t;
41 
42 typedef unsigned long		uintptr_t;
43 typedef long			intptr_t;
44 
45 #ifdef CONFIG_HAVE_UID16
46 /* This is defined by include/asm-{arch}/posix_types.h */
47 typedef __kernel_old_uid_t	old_uid_t;
48 typedef __kernel_old_gid_t	old_gid_t;
49 #endif /* CONFIG_UID16 */
50 
51 #if defined(__GNUC__)
52 typedef __kernel_loff_t		loff_t;
53 #endif
54 
55 /*
56  * The following typedefs are also protected by individual ifdefs for
57  * historical reasons:
58  */
59 #ifndef _SIZE_T
60 #define _SIZE_T
61 typedef __kernel_size_t		size_t;
62 #endif
63 
64 #ifndef _SSIZE_T
65 #define _SSIZE_T
66 typedef __kernel_ssize_t	ssize_t;
67 #endif
68 
69 #ifndef _PTRDIFF_T
70 #define _PTRDIFF_T
71 typedef __kernel_ptrdiff_t	ptrdiff_t;
72 #endif
73 
74 #ifndef _CLOCK_T
75 #define _CLOCK_T
76 typedef __kernel_clock_t	clock_t;
77 #endif
78 
79 #ifndef _CADDR_T
80 #define _CADDR_T
81 typedef __kernel_caddr_t	caddr_t;
82 #endif
83 
84 /* bsd */
85 typedef unsigned char		u_char;
86 typedef unsigned short		u_short;
87 typedef unsigned int		u_int;
88 typedef unsigned long		u_long;
89 
90 /* sysv */
91 typedef unsigned char		unchar;
92 typedef unsigned short		ushort;
93 typedef unsigned int		uint;
94 typedef unsigned long		ulong;
95 
96 #ifndef __BIT_TYPES_DEFINED__
97 #define __BIT_TYPES_DEFINED__
98 
99 typedef u8			u_int8_t;
100 typedef s8			int8_t;
101 typedef u16			u_int16_t;
102 typedef s16			int16_t;
103 typedef u32			u_int32_t;
104 typedef s32			int32_t;
105 
106 #endif /* !(__BIT_TYPES_DEFINED__) */
107 
108 typedef u8			uint8_t;
109 typedef u16			uint16_t;
110 typedef u32			uint32_t;
111 
112 #if defined(__GNUC__)
113 typedef u64			uint64_t;
114 typedef u64			u_int64_t;
115 typedef s64			int64_t;
116 #endif
117 
118 /* this is a special 64bit data type that is 8-byte aligned */
119 #define aligned_u64		__aligned_u64
120 #define aligned_be64		__aligned_be64
121 #define aligned_le64		__aligned_le64
122 
123 /* Nanosecond scalar representation for kernel time values */
124 typedef s64	ktime_t;
125 
126 /**
127  * The type used for indexing onto a disc or disc partition.
128  *
129  * Linux always considers sectors to be 512 bytes long independently
130  * of the devices real block size.
131  *
132  * blkcnt_t is the type of the inode's block count.
133  */
134 typedef u64 sector_t;
135 typedef u64 blkcnt_t;
136 
137 /*
138  * The type of an index into the pagecache.
139  */
140 #define pgoff_t unsigned long
141 
142 /*
143  * A dma_addr_t can hold any valid DMA address, i.e., any address returned
144  * by the DMA API.
145  *
146  * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
147  * bits wide.  Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
148  * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
149  * so they don't care about the size of the actual bus addresses.
150  */
151 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
152 typedef u64 dma_addr_t;
153 #else
154 typedef u32 dma_addr_t;
155 #endif
156 
157 typedef unsigned int __bitwise gfp_t;
158 typedef unsigned int __bitwise slab_flags_t;
159 typedef unsigned int __bitwise fmode_t;
160 
161 #ifdef CONFIG_PHYS_ADDR_T_64BIT
162 typedef u64 phys_addr_t;
163 #else
164 typedef u32 phys_addr_t;
165 #endif
166 
167 typedef phys_addr_t resource_size_t;
168 
169 /*
170  * This type is the placeholder for a hardware interrupt number. It has to be
171  * big enough to enclose whatever representation is used by a given platform.
172  */
173 typedef unsigned long irq_hw_number_t;
174 
175 typedef struct {
176 	int counter;
177 } atomic_t;
178 
179 #define ATOMIC_INIT(i) { (i) }
180 
181 #ifdef CONFIG_64BIT
182 typedef struct {
183 	s64 counter;
184 } atomic64_t;
185 #endif
186 
187 typedef struct {
188 	atomic_t refcnt;
189 } rcuref_t;
190 
191 #define RCUREF_INIT(i)	{ .refcnt = ATOMIC_INIT(i - 1) }
192 
193 struct list_head {
194 	struct list_head *next, *prev;
195 };
196 
197 struct hlist_head {
198 	struct hlist_node *first;
199 };
200 
201 struct hlist_node {
202 	struct hlist_node *next, **pprev;
203 };
204 
205 struct ustat {
206 	__kernel_daddr_t	f_tfree;
207 #ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
208 	unsigned int		f_tinode;
209 #else
210 	unsigned long		f_tinode;
211 #endif
212 	char			f_fname[6];
213 	char			f_fpack[6];
214 };
215 
216 /**
217  * struct callback_head - callback structure for use with RCU and task_work
218  * @next: next update requests in a list
219  * @func: actual update function to call after the grace period.
220  *
221  * The struct is aligned to size of pointer. On most architectures it happens
222  * naturally due ABI requirements, but some architectures (like CRIS) have
223  * weird ABI and we need to ask it explicitly.
224  *
225  * The alignment is required to guarantee that bit 0 of @next will be
226  * clear under normal conditions -- as long as we use call_rcu() or
227  * call_srcu() to queue the callback.
228  *
229  * This guarantee is important for few reasons:
230  *  - future call_rcu_lazy() will make use of lower bits in the pointer;
231  *  - the structure shares storage space in struct page with @compound_head,
232  *    which encode PageTail() in bit 0. The guarantee is needed to avoid
233  *    false-positive PageTail().
234  */
235 struct callback_head {
236 	struct callback_head *next;
237 	void (*func)(struct callback_head *head);
238 } __attribute__((aligned(sizeof(void *))));
239 #define rcu_head callback_head
240 
241 typedef void (*rcu_callback_t)(struct rcu_head *head);
242 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
243 
244 typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
245 typedef void (*swap_func_t)(void *a, void *b, int size);
246 
247 typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
248 typedef int (*cmp_func_t)(const void *a, const void *b);
249 
250 #endif /*  __ASSEMBLY__ */
251 #endif /* _LINUX_TYPES_H */
252