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 arch/{arch}/include/asm/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 typedef __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 62 typedef __kernel_size_t size_t; 63 #endif 64 65 #ifndef _SSIZE_T 66 #define _SSIZE_T 67 typedef __kernel_ssize_t ssize_t; 68 #endif 69 70 #ifndef _PTRDIFF_T 71 #define _PTRDIFF_T 72 typedef __kernel_ptrdiff_t ptrdiff_t; 73 #endif 74 75 #ifndef _CLOCK_T 76 #define _CLOCK_T 77 typedef __kernel_clock_t clock_t; 78 #endif 79 80 #ifndef _CADDR_T 81 #define _CADDR_T 82 typedef __kernel_caddr_t caddr_t; 83 #endif 84 85 /* bsd */ 86 typedef unsigned char u_char; 87 typedef unsigned short u_short; 88 typedef unsigned int u_int; 89 typedef unsigned long u_long; 90 91 /* sysv */ 92 typedef unsigned char unchar; 93 typedef unsigned short ushort; 94 typedef unsigned int uint; 95 typedef unsigned long ulong; 96 typedef unsigned long long ullong; 97 98 #ifndef __BIT_TYPES_DEFINED__ 99 #define __BIT_TYPES_DEFINED__ 100 101 typedef u8 u_int8_t; 102 typedef s8 int8_t; 103 typedef u16 u_int16_t; 104 typedef s16 int16_t; 105 typedef u32 u_int32_t; 106 typedef s32 int32_t; 107 108 #endif /* !(__BIT_TYPES_DEFINED__) */ 109 110 typedef u8 uint8_t; 111 typedef u16 uint16_t; 112 typedef u32 uint32_t; 113 114 #if defined(__GNUC__) 115 typedef u64 uint64_t; 116 typedef u64 u_int64_t; 117 typedef 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 */ 127 typedef 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 */ 137 typedef u64 sector_t; 138 typedef 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 159 typedef u64 dma_addr_t; 160 #else 161 typedef u32 dma_addr_t; 162 #endif 163 164 typedef unsigned int __bitwise gfp_t; 165 typedef unsigned int __bitwise slab_flags_t; 166 typedef unsigned int __bitwise fmode_t; 167 168 #ifdef CONFIG_PHYS_ADDR_T_64BIT 169 typedef u64 phys_addr_t; 170 #else 171 typedef u32 phys_addr_t; 172 #endif 173 174 typedef 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 */ 180 typedef unsigned long irq_hw_number_t; 181 182 typedef struct { 183 int counter; 184 } atomic_t; 185 186 #define ATOMIC_INIT(i) { (i) } 187 188 #ifdef CONFIG_64BIT 189 typedef struct { 190 s64 counter; 191 } atomic64_t; 192 #endif 193 194 typedef struct { 195 atomic_t refcnt; 196 } rcuref_t; 197 198 #define RCUREF_INIT(i) { .refcnt = ATOMIC_INIT(i - 1) } 199 200 struct list_head { 201 struct list_head *next, *prev; 202 }; 203 204 struct hlist_head { 205 struct hlist_node *first; 206 }; 207 208 struct hlist_node { 209 struct hlist_node *next, **pprev; 210 }; 211 212 struct 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 */ 242 struct 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 247 248 typedef void (*rcu_callback_t)(struct rcu_head *head); 249 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func); 250 251 typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv); 252 typedef void (*swap_func_t)(void *a, void *b, int size); 253 254 typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv); 255 typedef 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 */ 265 struct rcuwait { 266 struct task_struct __rcu *task; 267 }; 268 269 #endif /* __ASSEMBLY__ */ 270 #endif /* _LINUX_TYPES_H */ 271