444 lines
11 KiB
C
444 lines
11 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
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* Copyright (c) 2014-2015 François Tigeot
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_KERNEL_H_
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#define _LINUX_KERNEL_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/param.h>
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#include <sys/libkern.h>
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#include <sys/stat.h>
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#include <sys/smp.h>
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#include <sys/stddef.h>
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#include <sys/syslog.h>
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#include <sys/time.h>
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#include <linux/bitops.h>
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/jiffies.h>
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#include <linux/log2.h>
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#include <asm/byteorder.h>
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#include <machine/stdarg.h>
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#define KERN_CONT ""
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#define KERN_EMERG "<0>"
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#define KERN_ALERT "<1>"
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#define KERN_CRIT "<2>"
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#define KERN_ERR "<3>"
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#define KERN_WARNING "<4>"
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#define KERN_NOTICE "<5>"
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#define KERN_INFO "<6>"
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#define KERN_DEBUG "<7>"
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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 S8_C(x) x
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#define U8_C(x) x ## U
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#define S16_C(x) x
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#define U16_C(x) x ## U
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#define S32_C(x) x
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#define U32_C(x) x ## U
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#define S64_C(x) x ## LL
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#define U64_C(x) x ## ULL
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#define BUILD_BUG_ON(x) CTASSERT(!(x))
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#define BUILD_BUG_ON_MSG(x, msg) BUILD_BUG_ON(x)
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#define BUILD_BUG_ON_NOT_POWER_OF_2(x) BUILD_BUG_ON(!powerof2(x))
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#define BUG() panic("BUG at %s:%d", __FILE__, __LINE__)
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#define BUG_ON(cond) do { \
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if (cond) { \
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panic("BUG ON %s failed at %s:%d", \
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__stringify(cond), __FILE__, __LINE__); \
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} \
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} while (0)
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#define WARN_ON(cond) ({ \
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bool __ret = (cond); \
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if (__ret) { \
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printf("WARNING %s failed at %s:%d\n", \
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__stringify(cond), __FILE__, __LINE__); \
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} \
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unlikely(__ret); \
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})
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#define WARN_ON_SMP(cond) WARN_ON(cond)
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#define WARN_ON_ONCE(cond) ({ \
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static bool __warn_on_once; \
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bool __ret = (cond); \
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if (__ret && !__warn_on_once) { \
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__warn_on_once = 1; \
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printf("WARNING %s failed at %s:%d\n", \
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__stringify(cond), __FILE__, __LINE__); \
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} \
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unlikely(__ret); \
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})
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#define oops_in_progress SCHEDULER_STOPPED()
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#undef ALIGN
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#define ALIGN(x, y) roundup2((x), (y))
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#undef PTR_ALIGN
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#define PTR_ALIGN(p, a) ((__typeof(p))ALIGN((uintptr_t)(p), (a)))
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#define DIV_ROUND_UP(x, n) howmany(x, n)
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#define DIV_ROUND_UP_ULL(x, n) DIV_ROUND_UP((unsigned long long)(x), (n))
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#define FIELD_SIZEOF(t, f) sizeof(((t *)0)->f)
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#define printk(...) printf(__VA_ARGS__)
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#define vprintk(f, a) vprintf(f, a)
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struct va_format {
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const char *fmt;
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va_list *va;
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};
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static inline int
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vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
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{
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ssize_t ssize = size;
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int i;
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i = vsnprintf(buf, size, fmt, args);
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return ((i >= ssize) ? (ssize - 1) : i);
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}
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static inline int
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scnprintf(char *buf, size_t size, const char *fmt, ...)
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{
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va_list args;
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int i;
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va_start(args, fmt);
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i = vscnprintf(buf, size, fmt, args);
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va_end(args);
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return (i);
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}
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/*
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* The "pr_debug()" and "pr_devel()" macros should produce zero code
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* unless DEBUG is defined:
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*/
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#ifdef DEBUG
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#define pr_debug(fmt, ...) \
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log(LOG_DEBUG, fmt, ##__VA_ARGS__)
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#define pr_devel(fmt, ...) \
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log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__)
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#else
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#define pr_debug(fmt, ...) \
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({ if (0) log(LOG_DEBUG, fmt, ##__VA_ARGS__); 0; })
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#define pr_devel(fmt, ...) \
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({ if (0) log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__); 0; })
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#endif
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#ifndef pr_fmt
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#define pr_fmt(fmt) fmt
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#endif
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/*
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* Print a one-time message (analogous to WARN_ONCE() et al):
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*/
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#define printk_once(...) do { \
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static bool __print_once; \
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\
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if (!__print_once) { \
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__print_once = true; \
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printk(__VA_ARGS__); \
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} \
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} while (0)
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/*
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* Log a one-time message (analogous to WARN_ONCE() et al):
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*/
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#define log_once(level,...) do { \
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static bool __log_once; \
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\
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if (unlikely(!__log_once)) { \
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__log_once = true; \
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log(level, __VA_ARGS__); \
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} \
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} while (0)
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#define pr_emerg(fmt, ...) \
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log(LOG_EMERG, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_alert(fmt, ...) \
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log(LOG_ALERT, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_crit(fmt, ...) \
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log(LOG_CRIT, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_err(fmt, ...) \
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log(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_warning(fmt, ...) \
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log(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_warn(...) \
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pr_warning(__VA_ARGS__)
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#define pr_warn_once(fmt, ...) \
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log_once(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_notice(fmt, ...) \
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log(LOG_NOTICE, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_info(fmt, ...) \
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log(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_info_once(fmt, ...) \
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log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_cont(fmt, ...) \
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printk(KERN_CONT fmt, ##__VA_ARGS__)
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#define pr_warn_ratelimited(...) do { \
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static linux_ratelimit_t __ratelimited; \
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if (linux_ratelimited(&__ratelimited)) \
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pr_warning(__VA_ARGS__); \
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} while (0)
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#ifndef WARN
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#define WARN(condition, ...) ({ \
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bool __ret_warn_on = (condition); \
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if (unlikely(__ret_warn_on)) \
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pr_warning(__VA_ARGS__); \
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unlikely(__ret_warn_on); \
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})
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#endif
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#ifndef WARN_ONCE
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#define WARN_ONCE(condition, ...) ({ \
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bool __ret_warn_on = (condition); \
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if (unlikely(__ret_warn_on)) \
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pr_warn_once(__VA_ARGS__); \
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unlikely(__ret_warn_on); \
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})
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#endif
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#define container_of(ptr, type, member) \
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({ \
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const __typeof(((type *)0)->member) *__p = (ptr); \
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(type *)((uintptr_t)__p - offsetof(type, member)); \
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})
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#define u64_to_user_ptr(val) ((void *)(uintptr_t)(val))
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static inline unsigned long long
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simple_strtoull(const char *cp, char **endp, unsigned int base)
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{
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return (strtouq(cp, endp, base));
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}
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static inline long long
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simple_strtoll(const char *cp, char **endp, unsigned int base)
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{
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return (strtoq(cp, endp, base));
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}
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static inline unsigned long
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simple_strtoul(const char *cp, char **endp, unsigned int base)
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{
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return (strtoul(cp, endp, base));
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}
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static inline long
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simple_strtol(const char *cp, char **endp, unsigned int base)
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{
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return (strtol(cp, endp, base));
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}
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static inline int
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kstrtoul(const char *cp, unsigned int base, unsigned long *res)
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{
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char *end;
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*res = strtoul(cp, &end, base);
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if (*cp == 0 || *end != 0)
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return (-EINVAL);
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return (0);
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}
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static inline int
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kstrtol(const char *cp, unsigned int base, long *res)
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{
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char *end;
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*res = strtol(cp, &end, base);
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if (*cp == 0 || *end != 0)
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return (-EINVAL);
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return (0);
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}
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static inline int
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kstrtoint(const char *cp, unsigned int base, int *res)
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{
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char *end;
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long temp;
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*res = temp = strtol(cp, &end, base);
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if (*cp == 0 || *end != 0)
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return (-EINVAL);
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if (temp != (int)temp)
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return (-ERANGE);
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return (0);
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}
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static inline int
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kstrtouint(const char *cp, unsigned int base, unsigned int *res)
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{
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char *end;
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unsigned long temp;
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*res = temp = strtoul(cp, &end, base);
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if (*cp == 0 || *end != 0)
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return (-EINVAL);
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if (temp != (unsigned int)temp)
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return (-ERANGE);
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return (0);
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}
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static inline int
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kstrtou32(const char *cp, unsigned int base, u32 *res)
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{
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char *end;
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unsigned long temp;
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*res = temp = strtoul(cp, &end, base);
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if (*cp == 0 || *end != 0)
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return (-EINVAL);
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if (temp != (u32)temp)
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return (-ERANGE);
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return (0);
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}
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#define min(x, y) ((x) < (y) ? (x) : (y))
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#define max(x, y) ((x) > (y) ? (x) : (y))
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#define min3(a, b, c) min(a, min(b,c))
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#define max3(a, b, c) max(a, max(b,c))
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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, _x, min, max) min_t(type, max_t(type, _x, min), max)
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#define clamp(x, lo, hi) min( max(x,lo), hi)
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#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
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/*
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* This looks more complex than it should be. But we need to
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* get the type for the ~ right in round_down (it needs to be
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* as wide as the result!), and we want to evaluate the macro
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* arguments just once each.
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*/
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#define __round_mask(x, y) ((__typeof__(x))((y)-1))
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#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
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#define round_down(x, y) ((x) & ~__round_mask(x, y))
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#define smp_processor_id() PCPU_GET(cpuid)
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#define num_possible_cpus() mp_ncpus
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#define num_online_cpus() mp_ncpus
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#if defined(__i386__) || defined(__amd64__)
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extern bool linux_cpu_has_clflush;
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#define cpu_has_clflush linux_cpu_has_clflush
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#endif
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typedef struct pm_message {
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int event;
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} pm_message_t;
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/* Swap values of a and b */
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#define swap(a, b) do { \
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typeof(a) _swap_tmp = a; \
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a = b; \
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b = _swap_tmp; \
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} while (0)
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#define DIV_ROUND_CLOSEST(x, divisor) (((x) + ((divisor) / 2)) / (divisor))
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#define DIV_ROUND_CLOSEST_ULL(x, divisor) ({ \
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__typeof(divisor) __d = (divisor); \
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unsigned long long __ret = (x) + (__d) / 2; \
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__ret /= __d; \
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__ret; \
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})
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static inline uintmax_t
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mult_frac(uintmax_t x, uintmax_t multiplier, uintmax_t divisor)
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{
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uintmax_t q = (x / divisor);
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uintmax_t r = (x % divisor);
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return ((q * multiplier) + ((r * multiplier) / divisor));
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}
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static inline int64_t
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abs64(int64_t x)
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{
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return (x < 0 ? -x : x);
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}
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typedef struct linux_ratelimit {
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struct timeval lasttime;
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int counter;
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} linux_ratelimit_t;
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static inline bool
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linux_ratelimited(linux_ratelimit_t *rl)
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{
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return (ppsratecheck(&rl->lasttime, &rl->counter, 1));
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}
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#endif /* _LINUX_KERNEL_H_ */
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