mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-03 00:00:07 +03:00
271 lines
8.9 KiB
C
271 lines
8.9 KiB
C
#ifndef __TOOLS_LINUX_KERNEL_H
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#define __TOOLS_LINUX_KERNEL_H
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#include <assert.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <limits.h>
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#include <linux/bug.h>
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#include <linux/byteorder.h>
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#include <linux/compiler.h>
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#include <linux/math.h>
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#define __ARG_PLACEHOLDER_1 0,
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#define __take_second_arg(__ignored, val, ...) val
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#define __and(x, y) ___and(x, y)
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#define ___and(x, y) ____and(__ARG_PLACEHOLDER_##x, y)
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#define ____and(arg1_or_junk, y) __take_second_arg(arg1_or_junk y, 0)
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#define __or(x, y) ___or(x, y)
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#define ___or(x, y) ____or(__ARG_PLACEHOLDER_##x, y)
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#define ____or(arg1_or_junk, y) __take_second_arg(arg1_or_junk 1, y)
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#define __is_defined(x) ___is_defined(x)
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#define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val)
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#define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0)
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/*
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* IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
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* otherwise. For boolean options, this is equivalent to
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* IS_ENABLED(CONFIG_FOO).
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*/
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#define IS_BUILTIN(option) __is_defined(option)
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/*
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* IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
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* otherwise.
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*/
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#define IS_MODULE(option) __is_defined(option##_MODULE)
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/*
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* IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
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* code can call a function defined in code compiled based on CONFIG_FOO.
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* This is similar to IS_ENABLED(), but returns false when invoked from
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* built-in code when CONFIG_FOO is set to 'm'.
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*/
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#define IS_REACHABLE(option) __or(IS_BUILTIN(option), \
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__and(IS_MODULE(option), __is_defined(MODULE)))
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/*
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* IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
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* 0 otherwise.
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*/
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#define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
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#define EXPORT_SYMBOL(sym)
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#define U8_MAX ((u8)~0U)
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#define S8_MAX ((s8)(U8_MAX>>1))
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#define S8_MIN ((s8)(-S8_MAX - 1))
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#define U16_MAX ((u16)~0U)
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#define S16_MAX ((s16)(U16_MAX>>1))
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#define S16_MIN ((s16)(-S16_MAX - 1))
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#define U32_MAX ((u32)~0U)
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#define S32_MAX ((s32)(U32_MAX>>1))
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#define S32_MIN ((s32)(-S32_MAX - 1))
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#define U64_MAX ((u64)~0ULL)
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#define S64_MAX ((s64)(U64_MAX>>1))
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#define S64_MIN ((s64)(-S64_MAX - 1))
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#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
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#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
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#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
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#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
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#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#ifndef container_of
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/**
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* container_of - cast a member of a structure out to the containing structure
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*
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*/
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *)0)->member) * __mptr = (ptr); \
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(type *)((char *)__mptr - offsetof(type, member)); })
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#endif
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#define max(x, y) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void) (&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; })
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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#define min_t(type, x, y) ({ \
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type __min1 = (x); \
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type __min2 = (y); \
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__min1 < __min2 ? __min1: __min2; })
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#define max_t(type, x, y) ({ \
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type __max1 = (x); \
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type __max2 = (y); \
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__max1 > __max2 ? __max1: __max2; })
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#define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)
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#define swap(a, b) \
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do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
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/* This counts to 12. Any more, it will return 13th argument. */
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#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
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#define COUNT_ARGS(X...) __COUNT_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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#define _RET_IP_ (unsigned long)__builtin_return_address(0)
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#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
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#define might_sleep()
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#define cpu_relax() do {} while (0)
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#define cpu_relax_lowlatency() do {} while (0)
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#define panic(fmt, ...) \
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do { \
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printf(fmt, ##__VA_ARGS__); \
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BUG(); \
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} while (0)
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int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res);
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int __must_check _kstrtol(const char *s, unsigned int base, long *res);
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int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
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int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
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/**
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* kstrtoul - convert a string to an unsigned long
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* @s: The start of the string. The string must be null-terminated, and may also
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* include a single newline before its terminating null. The first character
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* may also be a plus sign, but not a minus sign.
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* @base: The number base to use. The maximum supported base is 16. If base is
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* given as 0, then the base of the string is automatically detected with the
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* conventional semantics - If it begins with 0x the number will be parsed as a
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* hexadecimal (case insensitive), if it otherwise begins with 0, it will be
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* parsed as an octal number. Otherwise it will be parsed as a decimal.
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* @res: Where to write the result of the conversion on success.
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*
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* Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
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* Used as a replacement for the obsolete simple_strtoull. Return code must
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* be checked.
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*/
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static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
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{
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/*
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* We want to shortcut function call, but
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* __builtin_types_compatible_p(unsigned long, unsigned long long) = 0.
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*/
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if (sizeof(unsigned long) == sizeof(unsigned long long) &&
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__alignof__(unsigned long) == __alignof__(unsigned long long))
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return kstrtoull(s, base, (unsigned long long *)res);
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else
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return _kstrtoul(s, base, res);
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}
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/**
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* kstrtol - convert a string to a long
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* @s: The start of the string. The string must be null-terminated, and may also
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* include a single newline before its terminating null. The first character
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* may also be a plus sign or a minus sign.
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* @base: The number base to use. The maximum supported base is 16. If base is
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* given as 0, then the base of the string is automatically detected with the
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* conventional semantics - If it begins with 0x the number will be parsed as a
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* hexadecimal (case insensitive), if it otherwise begins with 0, it will be
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* parsed as an octal number. Otherwise it will be parsed as a decimal.
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* @res: Where to write the result of the conversion on success.
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*
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* Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
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* Used as a replacement for the obsolete simple_strtoull. Return code must
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* be checked.
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*/
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static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
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{
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/*
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* We want to shortcut function call, but
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* __builtin_types_compatible_p(long, long long) = 0.
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*/
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if (sizeof(long) == sizeof(long long) &&
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__alignof__(long) == __alignof__(long long))
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return kstrtoll(s, base, (long long *)res);
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else
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return _kstrtol(s, base, res);
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}
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int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res);
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int __must_check kstrtoint(const char *s, unsigned int base, int *res);
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static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res)
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{
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return kstrtoull(s, base, res);
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}
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static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res)
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{
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return kstrtoll(s, base, res);
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}
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static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res)
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{
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return kstrtouint(s, base, res);
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}
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static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res)
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{
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return kstrtoint(s, base, res);
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}
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struct printbuf;
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extern void prt_u64(struct printbuf *out, u64 num);
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extern __printf(2, 0) void prt_vprintf(struct printbuf *out, const char *fmt, va_list args);
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extern __printf(2, 3) void prt_printf(struct printbuf *out, const char *fmt, ...);
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static const char hex_asc[] = "0123456789abcdef";
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#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
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#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
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static const char hex_asc_upper[] = "0123456789ABCDEF";
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#define hex_asc_upper_lo(x) hex_asc_upper[((x) & 0x0f)]
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#define hex_asc_upper_hi(x) hex_asc_upper[((x) & 0xf0) >> 4]
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/* The hash is always the low bits of hash_len */
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define HASH_LEN_DECLARE u32 hash; u32 len
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#else
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#define HASH_LEN_DECLARE u32 len; u32 hash
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#endif
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struct qstr {
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union {
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struct {
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HASH_LEN_DECLARE;
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};
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u64 hash_len;
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};
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const unsigned char *name;
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};
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#define QSTR_INIT(n,l) { { { .len = l } }, .name = n }
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#define POISON_FREE 0x6b
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static inline void dump_stack(void) {}
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#define unsafe_memcpy(dst, src, bytes, justification) \
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memcpy(dst, src, bytes)
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#endif
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