446 lines
11 KiB
C
446 lines
11 KiB
C
/*-
|
|
* Copyright (c) 2010 Isilon Systems, Inc.
|
|
* Copyright (c) 2010 iX Systems, Inc.
|
|
* Copyright (c) 2010 Panasas, Inc.
|
|
* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
|
|
* Copyright (c) 2014-2015 François Tigeot
|
|
* 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_KERNEL_H_
|
|
#define _LINUX_KERNEL_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/param.h>
|
|
#include <sys/libkern.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/smp.h>
|
|
#include <sys/stddef.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/types.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/log2.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
#include <machine/stdarg.h>
|
|
|
|
#define KERN_CONT ""
|
|
#define KERN_EMERG "<0>"
|
|
#define KERN_ALERT "<1>"
|
|
#define KERN_CRIT "<2>"
|
|
#define KERN_ERR "<3>"
|
|
#define KERN_WARNING "<4>"
|
|
#define KERN_NOTICE "<5>"
|
|
#define KERN_INFO "<6>"
|
|
#define KERN_DEBUG "<7>"
|
|
|
|
#define U8_MAX ((u8)~0U)
|
|
#define S8_MAX ((s8)(U8_MAX >> 1))
|
|
#define S8_MIN ((s8)(-S8_MAX - 1))
|
|
#define U16_MAX ((u16)~0U)
|
|
#define S16_MAX ((s16)(U16_MAX >> 1))
|
|
#define S16_MIN ((s16)(-S16_MAX - 1))
|
|
#define U32_MAX ((u32)~0U)
|
|
#define S32_MAX ((s32)(U32_MAX >> 1))
|
|
#define S32_MIN ((s32)(-S32_MAX - 1))
|
|
#define U64_MAX ((u64)~0ULL)
|
|
#define S64_MAX ((s64)(U64_MAX >> 1))
|
|
#define S64_MIN ((s64)(-S64_MAX - 1))
|
|
|
|
#define S8_C(x) x
|
|
#define U8_C(x) x ## U
|
|
#define S16_C(x) x
|
|
#define U16_C(x) x ## U
|
|
#define S32_C(x) x
|
|
#define U32_C(x) x ## U
|
|
#define S64_C(x) x ## LL
|
|
#define U64_C(x) x ## ULL
|
|
|
|
#define BUILD_BUG() do { CTASSERT(0); } while (0)
|
|
#define BUILD_BUG_ON(x) CTASSERT(!(x))
|
|
#define BUILD_BUG_ON_MSG(x, msg) BUILD_BUG_ON(x)
|
|
#define BUILD_BUG_ON_NOT_POWER_OF_2(x) BUILD_BUG_ON(!powerof2(x))
|
|
#define BUILD_BUG_ON_INVALID(expr) while (0) { (void)(expr); }
|
|
|
|
#define BUG() panic("BUG at %s:%d", __FILE__, __LINE__)
|
|
#define BUG_ON(cond) do { \
|
|
if (cond) { \
|
|
panic("BUG ON %s failed at %s:%d", \
|
|
__stringify(cond), __FILE__, __LINE__); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define WARN_ON(cond) ({ \
|
|
bool __ret = (cond); \
|
|
if (__ret) { \
|
|
printf("WARNING %s failed at %s:%d\n", \
|
|
__stringify(cond), __FILE__, __LINE__); \
|
|
} \
|
|
unlikely(__ret); \
|
|
})
|
|
|
|
#define WARN_ON_SMP(cond) WARN_ON(cond)
|
|
|
|
#define WARN_ON_ONCE(cond) ({ \
|
|
static bool __warn_on_once; \
|
|
bool __ret = (cond); \
|
|
if (__ret && !__warn_on_once) { \
|
|
__warn_on_once = 1; \
|
|
printf("WARNING %s failed at %s:%d\n", \
|
|
__stringify(cond), __FILE__, __LINE__); \
|
|
} \
|
|
unlikely(__ret); \
|
|
})
|
|
|
|
#define oops_in_progress SCHEDULER_STOPPED()
|
|
|
|
#undef ALIGN
|
|
#define ALIGN(x, y) roundup2((x), (y))
|
|
#undef PTR_ALIGN
|
|
#define PTR_ALIGN(p, a) ((__typeof(p))ALIGN((uintptr_t)(p), (a)))
|
|
#define DIV_ROUND_UP(x, n) howmany(x, n)
|
|
#define DIV_ROUND_UP_ULL(x, n) DIV_ROUND_UP((unsigned long long)(x), (n))
|
|
#define FIELD_SIZEOF(t, f) sizeof(((t *)0)->f)
|
|
|
|
#define printk(...) printf(__VA_ARGS__)
|
|
#define vprintk(f, a) vprintf(f, a)
|
|
|
|
struct va_format {
|
|
const char *fmt;
|
|
va_list *va;
|
|
};
|
|
|
|
static inline int
|
|
vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
|
{
|
|
ssize_t ssize = size;
|
|
int i;
|
|
|
|
i = vsnprintf(buf, size, fmt, args);
|
|
|
|
return ((i >= ssize) ? (ssize - 1) : i);
|
|
}
|
|
|
|
static inline int
|
|
scnprintf(char *buf, size_t size, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i = vscnprintf(buf, size, fmt, args);
|
|
va_end(args);
|
|
|
|
return (i);
|
|
}
|
|
|
|
/*
|
|
* The "pr_debug()" and "pr_devel()" macros should produce zero code
|
|
* unless DEBUG is defined:
|
|
*/
|
|
#ifdef DEBUG
|
|
#define pr_debug(fmt, ...) \
|
|
log(LOG_DEBUG, fmt, ##__VA_ARGS__)
|
|
#define pr_devel(fmt, ...) \
|
|
log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#else
|
|
#define pr_debug(fmt, ...) \
|
|
({ if (0) log(LOG_DEBUG, fmt, ##__VA_ARGS__); 0; })
|
|
#define pr_devel(fmt, ...) \
|
|
({ if (0) log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__); 0; })
|
|
#endif
|
|
|
|
#ifndef pr_fmt
|
|
#define pr_fmt(fmt) fmt
|
|
#endif
|
|
|
|
/*
|
|
* Print a one-time message (analogous to WARN_ONCE() et al):
|
|
*/
|
|
#define printk_once(...) do { \
|
|
static bool __print_once; \
|
|
\
|
|
if (!__print_once) { \
|
|
__print_once = true; \
|
|
printk(__VA_ARGS__); \
|
|
} \
|
|
} while (0)
|
|
|
|
/*
|
|
* Log a one-time message (analogous to WARN_ONCE() et al):
|
|
*/
|
|
#define log_once(level,...) do { \
|
|
static bool __log_once; \
|
|
\
|
|
if (unlikely(!__log_once)) { \
|
|
__log_once = true; \
|
|
log(level, __VA_ARGS__); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define pr_emerg(fmt, ...) \
|
|
log(LOG_EMERG, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_alert(fmt, ...) \
|
|
log(LOG_ALERT, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_crit(fmt, ...) \
|
|
log(LOG_CRIT, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_err(fmt, ...) \
|
|
log(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_warning(fmt, ...) \
|
|
log(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_warn(...) \
|
|
pr_warning(__VA_ARGS__)
|
|
#define pr_warn_once(fmt, ...) \
|
|
log_once(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_notice(fmt, ...) \
|
|
log(LOG_NOTICE, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_info(fmt, ...) \
|
|
log(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_info_once(fmt, ...) \
|
|
log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
|
|
#define pr_cont(fmt, ...) \
|
|
printk(KERN_CONT fmt, ##__VA_ARGS__)
|
|
#define pr_warn_ratelimited(...) do { \
|
|
static linux_ratelimit_t __ratelimited; \
|
|
if (linux_ratelimited(&__ratelimited)) \
|
|
pr_warning(__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#ifndef WARN
|
|
#define WARN(condition, ...) ({ \
|
|
bool __ret_warn_on = (condition); \
|
|
if (unlikely(__ret_warn_on)) \
|
|
pr_warning(__VA_ARGS__); \
|
|
unlikely(__ret_warn_on); \
|
|
})
|
|
#endif
|
|
|
|
#ifndef WARN_ONCE
|
|
#define WARN_ONCE(condition, ...) ({ \
|
|
bool __ret_warn_on = (condition); \
|
|
if (unlikely(__ret_warn_on)) \
|
|
pr_warn_once(__VA_ARGS__); \
|
|
unlikely(__ret_warn_on); \
|
|
})
|
|
#endif
|
|
|
|
#define container_of(ptr, type, member) \
|
|
({ \
|
|
const __typeof(((type *)0)->member) *__p = (ptr); \
|
|
(type *)((uintptr_t)__p - offsetof(type, member)); \
|
|
})
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
|
|
#define u64_to_user_ptr(val) ((void *)(uintptr_t)(val))
|
|
|
|
static inline unsigned long long
|
|
simple_strtoull(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
return (strtouq(cp, endp, base));
|
|
}
|
|
|
|
static inline long long
|
|
simple_strtoll(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
return (strtoq(cp, endp, base));
|
|
}
|
|
|
|
static inline unsigned long
|
|
simple_strtoul(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
return (strtoul(cp, endp, base));
|
|
}
|
|
|
|
static inline long
|
|
simple_strtol(const char *cp, char **endp, unsigned int base)
|
|
{
|
|
return (strtol(cp, endp, base));
|
|
}
|
|
|
|
static inline int
|
|
kstrtoul(const char *cp, unsigned int base, unsigned long *res)
|
|
{
|
|
char *end;
|
|
|
|
*res = strtoul(cp, &end, base);
|
|
|
|
if (*cp == 0 || *end != 0)
|
|
return (-EINVAL);
|
|
return (0);
|
|
}
|
|
|
|
static inline int
|
|
kstrtol(const char *cp, unsigned int base, long *res)
|
|
{
|
|
char *end;
|
|
|
|
*res = strtol(cp, &end, base);
|
|
|
|
if (*cp == 0 || *end != 0)
|
|
return (-EINVAL);
|
|
return (0);
|
|
}
|
|
|
|
static inline int
|
|
kstrtoint(const char *cp, unsigned int base, int *res)
|
|
{
|
|
char *end;
|
|
long temp;
|
|
|
|
*res = temp = strtol(cp, &end, base);
|
|
|
|
if (*cp == 0 || *end != 0)
|
|
return (-EINVAL);
|
|
if (temp != (int)temp)
|
|
return (-ERANGE);
|
|
return (0);
|
|
}
|
|
|
|
static inline int
|
|
kstrtouint(const char *cp, unsigned int base, unsigned int *res)
|
|
{
|
|
char *end;
|
|
unsigned long temp;
|
|
|
|
*res = temp = strtoul(cp, &end, base);
|
|
|
|
if (*cp == 0 || *end != 0)
|
|
return (-EINVAL);
|
|
if (temp != (unsigned int)temp)
|
|
return (-ERANGE);
|
|
return (0);
|
|
}
|
|
|
|
static inline int
|
|
kstrtou32(const char *cp, unsigned int base, u32 *res)
|
|
{
|
|
char *end;
|
|
unsigned long temp;
|
|
|
|
*res = temp = strtoul(cp, &end, base);
|
|
|
|
if (*cp == 0 || *end != 0)
|
|
return (-EINVAL);
|
|
if (temp != (u32)temp)
|
|
return (-ERANGE);
|
|
return (0);
|
|
}
|
|
|
|
#define min(x, y) ((x) < (y) ? (x) : (y))
|
|
#define max(x, y) ((x) > (y) ? (x) : (y))
|
|
|
|
#define min3(a, b, c) min(a, min(b,c))
|
|
#define max3(a, b, c) max(a, max(b,c))
|
|
|
|
#define min_t(type, x, y) ({ \
|
|
type __min1 = (x); \
|
|
type __min2 = (y); \
|
|
__min1 < __min2 ? __min1 : __min2; })
|
|
|
|
#define max_t(type, x, y) ({ \
|
|
type __max1 = (x); \
|
|
type __max2 = (y); \
|
|
__max1 > __max2 ? __max1 : __max2; })
|
|
|
|
#define clamp_t(type, _x, min, max) min_t(type, max_t(type, _x, min), max)
|
|
#define clamp(x, lo, hi) min( max(x,lo), hi)
|
|
#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
|
|
|
|
/*
|
|
* This looks more complex than it should be. But we need to
|
|
* get the type for the ~ right in round_down (it needs to be
|
|
* as wide as the result!), and we want to evaluate the macro
|
|
* arguments just once each.
|
|
*/
|
|
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
|
|
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
|
|
#define round_down(x, y) ((x) & ~__round_mask(x, y))
|
|
|
|
#define smp_processor_id() PCPU_GET(cpuid)
|
|
#define num_possible_cpus() mp_ncpus
|
|
#define num_online_cpus() mp_ncpus
|
|
|
|
#if defined(__i386__) || defined(__amd64__)
|
|
extern bool linux_cpu_has_clflush;
|
|
#define cpu_has_clflush linux_cpu_has_clflush
|
|
#endif
|
|
|
|
typedef struct pm_message {
|
|
int event;
|
|
} pm_message_t;
|
|
|
|
/* Swap values of a and b */
|
|
#define swap(a, b) do { \
|
|
typeof(a) _swap_tmp = a; \
|
|
a = b; \
|
|
b = _swap_tmp; \
|
|
} while (0)
|
|
|
|
#define DIV_ROUND_CLOSEST(x, divisor) (((x) + ((divisor) / 2)) / (divisor))
|
|
|
|
#define DIV_ROUND_CLOSEST_ULL(x, divisor) ({ \
|
|
__typeof(divisor) __d = (divisor); \
|
|
unsigned long long __ret = (x) + (__d) / 2; \
|
|
__ret /= __d; \
|
|
__ret; \
|
|
})
|
|
|
|
static inline uintmax_t
|
|
mult_frac(uintmax_t x, uintmax_t multiplier, uintmax_t divisor)
|
|
{
|
|
uintmax_t q = (x / divisor);
|
|
uintmax_t r = (x % divisor);
|
|
|
|
return ((q * multiplier) + ((r * multiplier) / divisor));
|
|
}
|
|
|
|
static inline int64_t
|
|
abs64(int64_t x)
|
|
{
|
|
return (x < 0 ? -x : x);
|
|
}
|
|
|
|
typedef struct linux_ratelimit {
|
|
struct timeval lasttime;
|
|
int counter;
|
|
} linux_ratelimit_t;
|
|
|
|
static inline bool
|
|
linux_ratelimited(linux_ratelimit_t *rl)
|
|
{
|
|
return (ppsratecheck(&rl->lasttime, &rl->counter, 1));
|
|
}
|
|
|
|
#endif /* _LINUX_KERNEL_H_ */
|