types.h

  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__
 14typedef __s128 s128;
 15typedef __u128 u128;
 16#endif
 17
 18typedef u32 __kernel_dev_t;
 19
 20typedef __kernel_fd_set		fd_set;
 21typedef __kernel_dev_t		dev_t;
 22typedef __kernel_ulong_t	ino_t;
 23typedef __kernel_mode_t		mode_t;
 24typedef unsigned short		umode_t;
 25typedef u32			nlink_t;
 26typedef __kernel_off_t		off_t;
 27typedef __kernel_pid_t		pid_t;
 28typedef __kernel_daddr_t	daddr_t;
 29typedef __kernel_key_t		key_t;
 30typedef __kernel_suseconds_t	suseconds_t;
 31typedef __kernel_timer_t	timer_t;
 32typedef __kernel_clockid_t	clockid_t;
 33typedef __kernel_mqd_t		mqd_t;
 34
 35typedef _Bool			bool;
 36
 37typedef __kernel_uid32_t	uid_t;
 38typedef __kernel_gid32_t	gid_t;
 39typedef __kernel_uid16_t        uid16_t;
 40typedef __kernel_gid16_t        gid16_t;
 41
 42typedef unsigned long		uintptr_t;
 43typedef long			intptr_t;
 44
 45#ifdef CONFIG_HAVE_UID16
 46/* This is defined by arch/{arch}/include/asm/posix_types.h */
 47typedef __kernel_old_uid_t	old_uid_t;
 48typedef __kernel_old_gid_t	old_gid_t;
 49#endif /* CONFIG_UID16 */
 50
 51#if defined(__GNUC__)
 52typedef __kernel_loff_t		loff_t;
 53typedef __kernel_uoff_t		uoff_t;
 54#endif
 55
 56/*
 57 * The following typedefs are also protected by individual ifdefs for
 58 * historical reasons:
 59 */
 60#ifndef _SIZE_T
 61#define _SIZE_T
 62typedef __kernel_size_t		size_t;
 63#endif
 64
 65#ifndef _SSIZE_T
 66#define _SSIZE_T
 67typedef __kernel_ssize_t	ssize_t;
 68#endif
 69
 70#ifndef _PTRDIFF_T
 71#define _PTRDIFF_T
 72typedef __kernel_ptrdiff_t	ptrdiff_t;
 73#endif
 74
 75#ifndef _CLOCK_T
 76#define _CLOCK_T
 77typedef __kernel_clock_t	clock_t;
 78#endif
 79
 80#ifndef _CADDR_T
 81#define _CADDR_T
 82typedef __kernel_caddr_t	caddr_t;
 83#endif
 84
 85/* bsd */
 86typedef unsigned char		u_char;
 87typedef unsigned short		u_short;
 88typedef unsigned int		u_int;
 89typedef unsigned long		u_long;
 90
 91/* sysv */
 92typedef unsigned char		unchar;
 93typedef unsigned short		ushort;
 94typedef unsigned int		uint;
 95typedef unsigned long		ulong;
 96typedef unsigned long long	ullong;
 97
 98#ifndef __BIT_TYPES_DEFINED__
 99#define __BIT_TYPES_DEFINED__
100
101typedef u8			u_int8_t;
102typedef s8			int8_t;
103typedef u16			u_int16_t;
104typedef s16			int16_t;
105typedef u32			u_int32_t;
106typedef s32			int32_t;
107
108#endif /* !(__BIT_TYPES_DEFINED__) */
109
110typedef u8			uint8_t;
111typedef u16			uint16_t;
112typedef u32			uint32_t;
113
114#if defined(__GNUC__)
115typedef u64			uint64_t;
116typedef u64			u_int64_t;
117typedef s64			int64_t;
118#endif
119
120/* These are the special 64-bit data types that are 8-byte aligned */
121#define aligned_u64		__aligned_u64
122#define aligned_s64		__aligned_s64
123#define aligned_be64		__aligned_be64
124#define aligned_le64		__aligned_le64
125
126/* Nanosecond scalar representation for kernel time values */
127typedef s64	ktime_t;
128
129/**
130 * The type used for indexing onto a disc or disc partition.
131 *
132 * Linux always considers sectors to be 512 bytes long independently
133 * of the devices real block size.
134 *
135 * blkcnt_t is the type of the inode's block count.
136 */
137typedef u64 sector_t;
138typedef u64 blkcnt_t;
139
140/* generic data direction definitions */
141#define READ			0
142#define WRITE			1
143
144/*
145 * The type of an index into the pagecache.
146 */
147#define pgoff_t unsigned long
148
149/*
150 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
151 * by the DMA API.
152 *
153 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
154 * bits wide.  Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
155 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
156 * so they don't care about the size of the actual bus addresses.
157 */
158#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
159typedef u64 dma_addr_t;
160#else
161typedef u32 dma_addr_t;
162#endif
163
164typedef unsigned int __bitwise gfp_t;
165typedef unsigned int __bitwise slab_flags_t;
166typedef unsigned int __bitwise fmode_t;
167
168#ifdef CONFIG_PHYS_ADDR_T_64BIT
169typedef u64 phys_addr_t;
170#else
171typedef u32 phys_addr_t;
172#endif
173
174typedef phys_addr_t resource_size_t;
175
176/*
177 * This type is the placeholder for a hardware interrupt number. It has to be
178 * big enough to enclose whatever representation is used by a given platform.
179 */
180typedef unsigned long irq_hw_number_t;
181
182typedef struct {
183	int counter;
184} atomic_t;
185
186#define ATOMIC_INIT(i) { (i) }
187
188#ifdef CONFIG_64BIT
189typedef struct {
190	s64 counter;
191} atomic64_t;
192#endif
193
194typedef struct {
195	atomic_t refcnt;
196} rcuref_t;
197
198#define RCUREF_INIT(i)	{ .refcnt = ATOMIC_INIT(i - 1) }
199
200struct list_head {
201	struct list_head *next, *prev;
202};
203
204struct hlist_head {
205	struct hlist_node *first;
206};
207
208struct hlist_node {
209	struct hlist_node *next, **pprev;
210};
211
212struct ustat {
213	__kernel_daddr_t	f_tfree;
214#ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
215	unsigned int		f_tinode;
216#else
217	unsigned long		f_tinode;
218#endif
219	char			f_fname[6];
220	char			f_fpack[6];
221};
222
223/**
224 * struct callback_head - callback structure for use with RCU and task_work
225 * @next: next update requests in a list
226 * @func: actual update function to call after the grace period.
227 *
228 * The struct is aligned to size of pointer. On most architectures it happens
229 * naturally due ABI requirements, but some architectures (like CRIS) have
230 * weird ABI and we need to ask it explicitly.
231 *
232 * The alignment is required to guarantee that bit 0 of @next will be
233 * clear under normal conditions -- as long as we use call_rcu() or
234 * call_srcu() to queue the callback.
235 *
236 * This guarantee is important for few reasons:
237 *  - future call_rcu_lazy() will make use of lower bits in the pointer;
238 *  - the structure shares storage space in struct page with @compound_head,
239 *    which encode PageTail() in bit 0. The guarantee is needed to avoid
240 *    false-positive PageTail().
241 */
242struct callback_head {
243	struct callback_head *next;
244	void (*func)(struct callback_head *head);
245} __attribute__((aligned(sizeof(void *))));
246#define rcu_head callback_head
247
248typedef void (*rcu_callback_t)(struct rcu_head *head);
249typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
250
251typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
252typedef void (*swap_func_t)(void *a, void *b, int size);
253
254typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
255typedef int (*cmp_func_t)(const void *a, const void *b);
256
257/*
258 * rcuwait provides a way of blocking and waking up a single
259 * task in an rcu-safe manner.
260 *
261 * The only time @task is non-nil is when a user is blocked (or
262 * checking if it needs to) on a condition, and reset as soon as we
263 * know that the condition has succeeded and are awoken.
264 */
265struct rcuwait {
266	struct task_struct __rcu *task;
267};
268
269#endif /*  __ASSEMBLY__ */
270#endif /* _LINUX_TYPES_H */