401 lines
10 KiB
C
401 lines
10 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __KERNCOMPAT_H__
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#define __KERNCOMPAT_H__
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <endian.h>
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#include <byteswap.h>
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#include <assert.h>
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#include <stddef.h>
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#include <linux/types.h>
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#include <stdint.h>
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#include <features.h>
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#ifndef __GLIBC__
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#ifndef BTRFS_DISABLE_BACKTRACE
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#define BTRFS_DISABLE_BACKTRACE
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#endif
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#define __always_inline __inline __attribute__ ((__always_inline__))
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#endif
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#ifndef BTRFS_DISABLE_BACKTRACE
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#include <execinfo.h>
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#endif
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#define ptr_to_u64(x) ((u64)(uintptr_t)x)
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#define u64_to_ptr(x) ((void *)(uintptr_t)x)
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#ifndef READ
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#define READ 0
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#define WRITE 1
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#define READA 2
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#endif
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#define gfp_t int
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#define get_cpu_var(p) (p)
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#define __get_cpu_var(p) (p)
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#define BITS_PER_BYTE 8
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#define BITS_PER_LONG (__SIZEOF_LONG__ * BITS_PER_BYTE)
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#define __GFP_BITS_SHIFT 20
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#define __GFP_BITS_MASK ((int)((1 << __GFP_BITS_SHIFT) - 1))
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#define GFP_KERNEL 0
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#define GFP_NOFS 0
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#define __read_mostly
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#ifndef ULONG_MAX
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#define ULONG_MAX (~0UL)
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#endif
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#define __token_glue(a,b,c) ___token_glue(a,b,c)
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#define ___token_glue(a,b,c) a ## b ## c
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#ifdef DEBUG_BUILD_CHECKS
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#define BUILD_ASSERT(x) extern int __token_glue(compile_time_assert_,__LINE__,__COUNTER__)[1-2*!(x)] __attribute__((unused))
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#else
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#define BUILD_ASSERT(x)
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#endif
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#ifndef BTRFS_DISABLE_BACKTRACE
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#define MAX_BACKTRACE 16
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static inline void print_trace(void)
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{
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void *array[MAX_BACKTRACE];
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int size;
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size = backtrace(array, MAX_BACKTRACE);
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backtrace_symbols_fd(array, size, 2);
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}
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#endif
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static inline void warning_trace(const char *assertion, const char *filename,
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const char *func, unsigned line, long val)
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{
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if (!val)
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return;
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fprintf(stderr,
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"%s:%d: %s: Warning: assertion `%s` failed, value %ld\n",
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filename, line, func, assertion, val);
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#ifndef BTRFS_DISABLE_BACKTRACE
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print_trace();
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#endif
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}
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static inline void bugon_trace(const char *assertion, const char *filename,
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const char *func, unsigned line, long val)
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{
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if (!val)
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return;
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fprintf(stderr,
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"%s:%d: %s: BUG_ON `%s` triggered, value %ld\n",
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filename, line, func, assertion, val);
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#ifndef BTRFS_DISABLE_BACKTRACE
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print_trace();
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#endif
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abort();
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exit(1);
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}
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#ifdef __CHECKER__
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#define __force __attribute__((force))
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#define __bitwise__ __attribute__((bitwise))
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#else
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#define __force
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#define __bitwise__
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#endif
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#ifndef __CHECKER__
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/*
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* Since we're using primitive definitions from kernel-space, we need to
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* define __KERNEL__ so that system header files know which definitions
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* to use.
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*/
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#define __KERNEL__
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#include <asm/types.h>
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typedef __u32 u32;
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typedef __u64 u64;
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typedef __u16 u16;
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typedef __u8 u8;
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typedef __s64 s64;
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typedef __s32 s32;
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/*
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* Continuing to define __KERNEL__ breaks others parts of the code, so
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* we can just undefine it now that we have the correct headers...
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*/
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#undef __KERNEL__
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#else
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typedef unsigned int u32;
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typedef unsigned int __u32;
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typedef unsigned long long u64;
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef long long s64;
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typedef int s32;
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#endif
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struct vma_shared { int prio_tree_node; };
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struct vm_area_struct {
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unsigned long vm_pgoff;
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unsigned long vm_start;
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unsigned long vm_end;
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struct vma_shared shared;
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};
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struct page {
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unsigned long index;
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};
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struct mutex {
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unsigned long lock;
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};
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#define mutex_init(m) \
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do { \
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(m)->lock = 1; \
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} while (0)
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static inline void mutex_lock(struct mutex *m)
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{
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m->lock--;
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}
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static inline void mutex_unlock(struct mutex *m)
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{
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m->lock++;
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}
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static inline int mutex_is_locked(struct mutex *m)
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{
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return (m->lock != 1);
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}
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#define cond_resched() do { } while (0)
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#define preempt_enable() do { } while (0)
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#define preempt_disable() do { } while (0)
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#define BITOP_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
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#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
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#ifndef __attribute_const__
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#define __attribute_const__ __attribute__((__const__))
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#endif
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/**
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* __set_bit - Set a bit in memory
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* @nr: the bit to set
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* @addr: the address to start counting from
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*
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* Unlike set_bit(), this function is non-atomic and may be reordered.
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* If it's called on the same region of memory simultaneously, the effect
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* may be that only one operation succeeds.
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*/
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static inline void __set_bit(int nr, volatile unsigned long *addr)
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{
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unsigned long mask = BITOP_MASK(nr);
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unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr);
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*p |= mask;
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}
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static inline void __clear_bit(int nr, volatile unsigned long *addr)
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{
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unsigned long mask = BITOP_MASK(nr);
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unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr);
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*p &= ~mask;
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}
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/**
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* test_bit - Determine whether a bit is set
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* @nr: bit number to test
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* @addr: Address to start counting from
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*/
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static inline int test_bit(int nr, const volatile unsigned long *addr)
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{
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return 1UL & (addr[BITOP_WORD(nr)] >> (nr & (BITS_PER_LONG-1)));
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}
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/*
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* error pointer
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*/
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#define MAX_ERRNO 4095
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#define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO)
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static inline void *ERR_PTR(long error)
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{
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return (void *) error;
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}
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static inline long PTR_ERR(const void *ptr)
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{
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return (long) ptr;
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}
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static inline int IS_ERR(const void *ptr)
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{
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return IS_ERR_VALUE((unsigned long)ptr);
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}
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static inline int IS_ERR_OR_NULL(const void *ptr)
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{
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return !ptr || IS_ERR(ptr);
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}
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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 __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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#define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP
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/*
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* printk
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*/
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#define printk(fmt, args...) fprintf(stderr, fmt, ##args)
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#define KERN_CRIT ""
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#define KERN_ERR ""
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/*
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* kmalloc/kfree
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*/
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#define kmalloc(x, y) malloc(x)
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#define kzalloc(x, y) calloc(1, x)
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#define kstrdup(x, y) strdup(x)
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#define kfree(x) free(x)
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#define vmalloc(x) malloc(x)
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#define vfree(x) free(x)
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#ifndef BTRFS_DISABLE_BACKTRACE
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static inline void assert_trace(const char *assertion, const char *filename,
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const char *func, unsigned line, long val)
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{
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if (val)
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return;
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fprintf(stderr,
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"%s:%d: %s: Assertion `%s` failed, value %ld\n",
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filename, line, func, assertion, val);
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#ifndef BTRFS_DISABLE_BACKTRACE
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print_trace();
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#endif
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abort();
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exit(1);
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}
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#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
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#else
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#define ASSERT(c) assert(c)
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#endif
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#define BUG_ON(c) bugon_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
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#define BUG() BUG_ON(1)
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#define WARN_ON(c) warning_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
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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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#ifndef __bitwise
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#ifdef __CHECKER__
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#define __bitwise __bitwise__
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#else
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#define __bitwise
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#endif /* __CHECKER__ */
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#endif /* __bitwise */
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/* Alignment check */
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#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
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static inline int is_power_of_2(unsigned long n)
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{
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return (n != 0 && ((n & (n - 1)) == 0));
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}
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typedef u16 __bitwise __le16;
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typedef u16 __bitwise __be16;
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typedef u32 __bitwise __le32;
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typedef u32 __bitwise __be32;
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typedef u64 __bitwise __le64;
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typedef u64 __bitwise __be64;
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/* Macros to generate set/get funcs for the struct fields
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* assume there is a lefoo_to_cpu for every type, so lets make a simple
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* one for u8:
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*/
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#define le8_to_cpu(v) (v)
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#define cpu_to_le8(v) (v)
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#define __le8 u8
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define cpu_to_le64(x) ((__force __le64)(u64)(bswap_64(x)))
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#define le64_to_cpu(x) ((__force u64)(__le64)(bswap_64(x)))
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#define cpu_to_le32(x) ((__force __le32)(u32)(bswap_32(x)))
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#define le32_to_cpu(x) ((__force u32)(__le32)(bswap_32(x)))
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#define cpu_to_le16(x) ((__force __le16)(u16)(bswap_16(x)))
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#define le16_to_cpu(x) ((__force u16)(__le16)(bswap_16(x)))
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#else
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#define cpu_to_le64(x) ((__force __le64)(u64)(x))
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#define le64_to_cpu(x) ((__force u64)(__le64)(x))
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#define cpu_to_le32(x) ((__force __le32)(u32)(x))
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#define le32_to_cpu(x) ((__force u32)(__le32)(x))
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#define cpu_to_le16(x) ((__force __le16)(u16)(x))
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#define le16_to_cpu(x) ((__force u16)(__le16)(x))
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#endif
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struct __una_u16 { __le16 x; } __attribute__((__packed__));
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struct __una_u32 { __le32 x; } __attribute__((__packed__));
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struct __una_u64 { __le64 x; } __attribute__((__packed__));
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#define get_unaligned_le8(p) (*((u8 *)(p)))
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#define get_unaligned_8(p) (*((u8 *)(p)))
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#define put_unaligned_le8(val,p) ((*((u8 *)(p))) = (val))
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#define put_unaligned_8(val,p) ((*((u8 *)(p))) = (val))
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#define get_unaligned_le16(p) le16_to_cpu(((const struct __una_u16 *)(p))->x)
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#define get_unaligned_16(p) (((const struct __una_u16 *)(p))->x)
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#define put_unaligned_le16(val,p) (((struct __una_u16 *)(p))->x = cpu_to_le16(val))
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#define put_unaligned_16(val,p) (((struct __una_u16 *)(p))->x = (val))
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#define get_unaligned_le32(p) le32_to_cpu(((const struct __una_u32 *)(p))->x)
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#define get_unaligned_32(p) (((const struct __una_u32 *)(p))->x)
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#define put_unaligned_le32(val,p) (((struct __una_u32 *)(p))->x = cpu_to_le32(val))
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#define put_unaligned_32(val,p) (((struct __una_u32 *)(p))->x = (val))
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#define get_unaligned_le64(p) le64_to_cpu(((const struct __una_u64 *)(p))->x)
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#define get_unaligned_64(p) (((const struct __una_u64 *)(p))->x)
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#define put_unaligned_le64(val,p) (((struct __una_u64 *)(p))->x = cpu_to_le64(val))
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#define put_unaligned_64(val,p) (((struct __una_u64 *)(p))->x = (val))
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#ifndef true
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#define true 1
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#define false 0
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#endif
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#ifndef noinline
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#define noinline
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#endif
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#endif
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