/*
   * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   * All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it would be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write the Free Software Foundation,
   * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   */
  #ifndef __XFS_LINUX__
  #define __XFS_LINUX__
  
  #include <linux/types.h>
  
  /*
   * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
   * XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set.
   */
  #if defined(CONFIG_LBDAF) || (BITS_PER_LONG == 64)
  # define XFS_BIG_BLKNOS	1
  # define XFS_BIG_INUMS	1
  #else
  # define XFS_BIG_BLKNOS	0
  # define XFS_BIG_INUMS	0
  #endif
  
  /*
   * Kernel specific type declarations for XFS
   */
  typedef signed char		__int8_t;
  typedef unsigned char		__uint8_t;
  typedef signed short int	__int16_t;
  typedef unsigned short int	__uint16_t;
  typedef signed int		__int32_t;
  typedef unsigned int		__uint32_t;
  typedef signed long long int	__int64_t;
  typedef unsigned long long int	__uint64_t;
  
  typedef __uint32_t		inst_t;		/* an instruction */
  
  typedef __s64			xfs_off_t;	/* <file offset> type */
  typedef unsigned long long	xfs_ino_t;	/* <inode> type */
  typedef __s64			xfs_daddr_t;	/* <disk address> type */
  typedef char *			xfs_caddr_t;	/* <core address> type */
  typedef __u32			xfs_dev_t;
  typedef __u32			xfs_nlink_t;
  
  /* __psint_t is the same size as a pointer */
  #if (BITS_PER_LONG == 32)
  typedef __int32_t __psint_t;
  typedef __uint32_t __psunsigned_t;
  #elif (BITS_PER_LONG == 64)
  typedef __int64_t __psint_t;
  typedef __uint64_t __psunsigned_t;
  #else
  #error BITS_PER_LONG must be 32 or 64
  #endif
  
  #include "xfs_types.h"
  
  #include "kmem.h"
  #include "mrlock.h"
  #include "time.h"
  #include "uuid.h"
  
  #include <linux/semaphore.h>
  #include <linux/mm.h>
  #include <linux/kernel.h>
  #include <linux/blkdev.h>
  #include <linux/slab.h>
  #include <linux/crc32c.h>
  #include <linux/module.h>
  #include <linux/mutex.h>
  #include <linux/file.h>
  #include <linux/swap.h>
  #include <linux/errno.h>
  #include <linux/sched.h>
  #include <linux/bitops.h>
  #include <linux/major.h>
  #include <linux/pagemap.h>
  #include <linux/vfs.h>
  #include <linux/seq_file.h>
  #include <linux/init.h>
  #include <linux/list.h>
  #include <linux/proc_fs.h>
  #include <linux/sort.h>
  #include <linux/cpu.h>
  #include <linux/notifier.h>
  #include <linux/delay.h>
  #include <linux/log2.h>
  #include <linux/spinlock.h>
  #include <linux/random.h>
  #include <linux/ctype.h>
  #include <linux/writeback.h>
  #include <linux/capability.h>
  #include <linux/kthread.h>
  #include <linux/freezer.h>
  #include <linux/list_sort.h>
  #include <linux/ratelimit.h>
  
  #include <asm/page.h>
  #include <asm/div64.h>
  #include <asm/param.h>
  #include <asm/uaccess.h>
  #include <asm/byteorder.h>
  #include <asm/unaligned.h>
  
  #include "xfs_vnode.h"
  #include "xfs_stats.h"
  #include "xfs_sysctl.h"
  #include "xfs_iops.h"
  #include "xfs_aops.h"
  #include "xfs_super.h"
  #include "xfs_buf.h"
  #include "xfs_message.h"
  
  #ifdef __BIG_ENDIAN
  #define XFS_NATIVE_HOST 1
  #else
  #undef XFS_NATIVE_HOST
  #endif
  
  /*
   * Feature macros (disable/enable)
   */
  #ifdef CONFIG_SMP
  #define HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
  #else
  #undef  HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
  #endif
  
  #define irix_sgid_inherit	xfs_params.sgid_inherit.val
  #define irix_symlink_mode	xfs_params.symlink_mode.val
  #define xfs_panic_mask		xfs_params.panic_mask.val
  #define xfs_error_level		xfs_params.error_level.val
  #define xfs_syncd_centisecs	xfs_params.syncd_timer.val
  #define xfs_stats_clear		xfs_params.stats_clear.val
  #define xfs_inherit_sync	xfs_params.inherit_sync.val
  #define xfs_inherit_nodump	xfs_params.inherit_nodump.val
  #define xfs_inherit_noatime	xfs_params.inherit_noatim.val
  #define xfs_inherit_nosymlinks	xfs_params.inherit_nosym.val
  #define xfs_rotorstep		xfs_params.rotorstep.val
  #define xfs_inherit_nodefrag	xfs_params.inherit_nodfrg.val
  #define xfs_fstrm_centisecs	xfs_params.fstrm_timer.val
  #define xfs_eofb_secs		xfs_params.eofb_timer.val
  
  #define current_cpu()		(raw_smp_processor_id())
  #define current_pid()		(current->pid)
  #define current_test_flags(f)	(current->flags & (f))
  #define current_set_flags_nested(sp, f)		\
  		(*(sp) = current->flags, current->flags |= (f))
  #define current_clear_flags_nested(sp, f)	\
  		(*(sp) = current->flags, current->flags &= ~(f))
  #define current_restore_flags_nested(sp, f)	\
  		(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
  
  #define spinlock_destroy(lock)
  
  #define NBBY		8		/* number of bits per byte */
  
  /*
   * Size of block device i/o is parameterized here.
   * Currently the system supports page-sized i/o.
   */
  #define	BLKDEV_IOSHIFT		PAGE_CACHE_SHIFT
  #define	BLKDEV_IOSIZE		(1<<BLKDEV_IOSHIFT)
  /* number of BB's per block device block */
  #define	BLKDEV_BB		BTOBB(BLKDEV_IOSIZE)
  
  #define ENOATTR		ENODATA		/* Attribute not found */
  #define EWRONGFS	EINVAL		/* Mount with wrong filesystem type */
  #define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */
  
  #define SYNCHRONIZE()	barrier()
  #define __return_address __builtin_return_address(0)
  
  #define XFS_PROJID_DEFAULT	0
  #define MAXPATHLEN	1024
  
  #define MIN(a,b)	(min(a,b))
  #define MAX(a,b)	(max(a,b))
  #define howmany(x, y)	(((x)+((y)-1))/(y))
  
  /* Kernel uid/gid conversion. These are used to convert to/from the on disk
   * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
   * The conversion here is type only, the value will remain the same since we
   * are converting to the init_user_ns. The uid is later mapped to a particular
   * user namespace value when crossing the kernel/user boundary.
   */
  static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
  {
  	return from_kuid(&init_user_ns, uid);
  }
  
  static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
  {
  	return make_kuid(&init_user_ns, uid);
  }
  
  static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
  {
  	return from_kgid(&init_user_ns, gid);
  }
  
  static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
  {
  	return make_kgid(&init_user_ns, gid);
  }
  
  /*
   * Various platform dependent calls that don't fit anywhere else
   */
  #define xfs_sort(a,n,s,fn)	sort(a,n,s,fn,NULL)
  #define xfs_stack_trace()	dump_stack()
  
  
  /* Move the kernel do_div definition off to one side */
  
  #if defined __i386__
  /* For ia32 we need to pull some tricks to get past various versions
   * of the compiler which do not like us using do_div in the middle
   * of large functions.
   */
  static inline __u32 xfs_do_div(void *a, __u32 b, int n)
  {
  	__u32	mod;
  
  	switch (n) {
  		case 4:
  			mod = *(__u32 *)a % b;
  			*(__u32 *)a = *(__u32 *)a / b;
  			return mod;
  		case 8:
  			{
  			unsigned long __upper, __low, __high, __mod;
  			__u64	c = *(__u64 *)a;
  			__upper = __high = c >> 32;
  			__low = c;
  			if (__high) {
  				__upper = __high % (b);
  				__high = __high / (b);
  			}
  			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
  			asm("":"=A" (c):"a" (__low),"d" (__high));
  			*(__u64 *)a = c;
  			return __mod;
  			}
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  
  /* Side effect free 64 bit mod operation */
  static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
  {
  	switch (n) {
  		case 4:
  			return *(__u32 *)a % b;
  		case 8:
  			{
  			unsigned long __upper, __low, __high, __mod;
  			__u64	c = *(__u64 *)a;
  			__upper = __high = c >> 32;
  			__low = c;
  			if (__high) {
  				__upper = __high % (b);
  				__high = __high / (b);
  			}
  			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
  			asm("":"=A" (c):"a" (__low),"d" (__high));
  			return __mod;
  			}
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  #else
  static inline __u32 xfs_do_div(void *a, __u32 b, int n)
  {
  	__u32	mod;
  
  	switch (n) {
  		case 4:
  			mod = *(__u32 *)a % b;
  			*(__u32 *)a = *(__u32 *)a / b;
  			return mod;
  		case 8:
  			mod = do_div(*(__u64 *)a, b);
  			return mod;
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  
  /* Side effect free 64 bit mod operation */
  static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
  {
  	switch (n) {
  		case 4:
  			return *(__u32 *)a % b;
  		case 8:
  			{
  			__u64	c = *(__u64 *)a;
  			return do_div(c, b);
  			}
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  #endif
  
  #undef do_div
  #define do_div(a, b)	xfs_do_div(&(a), (b), sizeof(a))
  #define do_mod(a, b)	xfs_do_mod(&(a), (b), sizeof(a))
  
  static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
  {
  	x += y - 1;
  	do_div(x, y);
  	return(x * y);
  }
  
  static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
  {
  	x += y - 1;
  	do_div(x, y);
  	return x;
  }
  
  /* ARM old ABI has some weird alignment/padding */
  #if defined(__arm__) && !defined(__ARM_EABI__)
  #define __arch_pack __attribute__((packed))
  #else
  #define __arch_pack
  #endif
  
  #define ASSERT_ALWAYS(expr)	\
  	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
  
  #ifdef DEBUG
  #define ASSERT(expr)	\
  	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
  
  #ifndef STATIC
  # define STATIC noinline
  #endif
  
  #else	/* !DEBUG */
  
  #ifdef XFS_WARN
  
  #define ASSERT(expr)	\
  	(unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
  
  #ifndef STATIC
  # define STATIC static noinline
  #endif
  
  #else	/* !DEBUG && !XFS_WARN */
  
  #define ASSERT(expr)	((void)0)
  
  #ifndef STATIC
  # define STATIC static noinline
  #endif
  
  #endif /* XFS_WARN */
  #endif /* DEBUG */
  
  #endif /* __XFS_LINUX__ */