[linux-2.6-block.git] / fs / xfs / xfs_linux.h

/*
 * 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>

/*
 * 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 "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_fs.h"
#include "xfs_stats.h"
#include "xfs_sysctl.h"
#include "xfs_iops.h"
#include "xfs_aops.h"
#include "xfs_super.h"
#include "xfs_cksum.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 EFSBADCRC	EBADMSG		/* Bad CRC detected */

#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))

static inline void delay(long ticks)
{
	schedule_timeout_uninterruptible(ticks);
}

/*
 * XFS wrapper structure for sysfs support. It depends on external data
 * structures and is embedded in various internal data structures to implement
 * the XFS sysfs object heirarchy. Define it here for broad access throughout
 * the codebase.
 */
struct xfs_kobj {
	struct kobject		kobject;
	struct completion	complete;
};

/* 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 */

#ifdef CONFIG_XFS_RT
#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
#else
#define XFS_IS_REALTIME_INODE(ip) (0)
#endif

#endif /* __XFS_LINUX__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_LINUX__
	19	#define __XFS_LINUX__
	20
	21	#include <linux/types.h>
1da177e4	22
4f3d71f6 DC	23	/*
	24	* Kernel specific type declarations for XFS
	25	*/
	26	typedef signed char __int8_t;
	27	typedef unsigned char __uint8_t;
	28	typedef signed short int __int16_t;
	29	typedef unsigned short int __uint16_t;
	30	typedef signed int __int32_t;
	31	typedef unsigned int __uint32_t;
	32	typedef signed long long int __int64_t;
	33	typedef unsigned long long int __uint64_t;
	34
	35	typedef __uint32_t inst_t; /* an instruction */
	36
	37	typedef __s64 xfs_off_t; /* <file offset> type */
	38	typedef unsigned long long xfs_ino_t; /* <inode> type */
	39	typedef __s64 xfs_daddr_t; /* <disk address> type */
	40	typedef char * xfs_caddr_t; /* <core address> type */
	41	typedef __u32 xfs_dev_t;
	42	typedef __u32 xfs_nlink_t;
	43
	44	/* __psint_t is the same size as a pointer */
	45	#if (BITS_PER_LONG == 32)
	46	typedef __int32_t __psint_t;
	47	typedef __uint32_t __psunsigned_t;
	48	#elif (BITS_PER_LONG == 64)
	49	typedef __int64_t __psint_t;
	50	typedef __uint64_t __psunsigned_t;
	51	#else
	52	#error BITS_PER_LONG must be 32 or 64
	53	#endif
	54
06f8e2d6	55	#include "xfs_types.h"
1da177e4	56
06f8e2d6 AE	57	#include "kmem.h"
06f8e2d6 AE	58	#include "mrlock.h"
06f8e2d6	59	#include "uuid.h"
1da177e4	60
ab4a9b04	61	#include <linux/semaphore.h>
1da177e4 LT	62	#include <linux/mm.h>
	63	#include <linux/kernel.h>
	64	#include <linux/blkdev.h>
	65	#include <linux/slab.h>
bc02e869	66	#include <linux/crc32c.h>
1da177e4	67	#include <linux/module.h>
a0b0b8a5	68	#include <linux/mutex.h>
1da177e4 LT	69	#include <linux/file.h>
	70	#include <linux/swap.h>
	71	#include <linux/errno.h>
	72	#include <linux/sched.h>
	73	#include <linux/bitops.h>
	74	#include <linux/major.h>
	75	#include <linux/pagemap.h>
	76	#include <linux/vfs.h>
	77	#include <linux/seq_file.h>
	78	#include <linux/init.h>
	79	#include <linux/list.h>
	80	#include <linux/proc_fs.h>
1da177e4	81	#include <linux/sort.h>
e8234a68 DC	82	#include <linux/cpu.h>
e8234a68 DC	83	#include <linux/notifier.h>
01e1b69c	84	#include <linux/delay.h>
af3a2e8a	85	#include <linux/log2.h>
007c61c6	86	#include <linux/spinlock.h>
64275ea4	87	#include <linux/random.h>
189f4bf2	88	#include <linux/ctype.h>
6bfb3d06	89	#include <linux/writeback.h>
6c77b0ea	90	#include <linux/capability.h>
0030807c CH	91	#include <linux/kthread.h>
0030807c CH	92	#include <linux/freezer.h>
8a072a4d	93	#include <linux/list_sort.h>
3d6e0361	94	#include <linux/ratelimit.h>
1da177e4 LT	95
	96	#include <asm/page.h>
	97	#include <asm/div64.h>
	98	#include <asm/param.h>
	99	#include <asm/uaccess.h>
	100	#include <asm/byteorder.h>
	101	#include <asm/unaligned.h>
	102
b92cc59f	103	#include "xfs_fs.h"
06f8e2d6 AE	104	#include "xfs_stats.h"
	105	#include "xfs_sysctl.h"
	106	#include "xfs_iops.h"
	107	#include "xfs_aops.h"
	108	#include "xfs_super.h"
51582170	109	#include "xfs_cksum.h"
06f8e2d6 AE	110	#include "xfs_buf.h"
06f8e2d6 AE	111	#include "xfs_message.h"
1da177e4	112
218106a1 CH	113	#ifdef __BIG_ENDIAN
	114	#define XFS_NATIVE_HOST 1
	115	#else
	116	#undef XFS_NATIVE_HOST
	117	#endif
	118
1da177e4 LT	119	/*
	120	* Feature macros (disable/enable)
	121	*/
d2c32edf	122	#ifdef CONFIG_SMP
8d280b98 DC	123	#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	124	#else
	125	#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	126	#endif
1da177e4	127
1da177e4 LT	128	#define irix_sgid_inherit xfs_params.sgid_inherit.val
	129	#define irix_symlink_mode xfs_params.symlink_mode.val
	130	#define xfs_panic_mask xfs_params.panic_mask.val
	131	#define xfs_error_level xfs_params.error_level.val
	132	#define xfs_syncd_centisecs xfs_params.syncd_timer.val
	133	#define xfs_stats_clear xfs_params.stats_clear.val
	134	#define xfs_inherit_sync xfs_params.inherit_sync.val
	135	#define xfs_inherit_nodump xfs_params.inherit_nodump.val
	136	#define xfs_inherit_noatime xfs_params.inherit_noatim.val
1da177e4 LT	137	#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
1da177e4 LT	138	#define xfs_rotorstep xfs_params.rotorstep.val
d3446eac	139	#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
2a82b8be	140	#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
579b62fa	141	#define xfs_eofb_secs xfs_params.eofb_timer.val
1da177e4	142
59c1b082	143	#define current_cpu() (raw_smp_processor_id())
1da177e4	144	#define current_pid() (current->pid)
59c1b082	145	#define current_test_flags(f) (current->flags & (f))
59c1b082 NS	146	#define current_set_flags_nested(sp, f) \
	147	(*(sp) = current->flags, current->flags \|= (f))
	148	#define current_clear_flags_nested(sp, f) \
	149	(*(sp) = current->flags, current->flags &= ~(f))
	150	#define current_restore_flags_nested(sp, f) \
	151	(current->flags = ((current->flags & ~(f)) \| (*(sp) & (f))))
1da177e4	152
007c61c6 ES	153	#define spinlock_destroy(lock)
007c61c6 ES	154
1da177e4	155	#define NBBY 8 /* number of bits per byte */
1da177e4 LT	156
	157	/*
	158	* Size of block device i/o is parameterized here.
	159	* Currently the system supports page-sized i/o.
	160	*/
e6a4b37f	161	#define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
1da177e4 LT	162	#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
	163	/* number of BB's per block device block */
	164	#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
	165
1da177e4	166	#define ENOATTR ENODATA /* Attribute not found */
da2f4d67 NS	167	#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
da2f4d67 NS	168	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
ca23f8fd	169	#define EFSBADCRC EBADMSG /* Bad CRC detected */
1da177e4 LT	170
	171	#define SYNCHRONIZE() barrier()
	172	#define __return_address __builtin_return_address(0)
	173
6743099c	174	#define XFS_PROJID_DEFAULT 0
1da177e4 LT	175	#define MAXPATHLEN 1024
	176
	177	#define MIN(a,b) (min(a,b))
	178	#define MAX(a,b) (max(a,b))
	179	#define howmany(x, y) (((x)+((y)-1))/(y))
1da177e4	180
e076b0f3 DC	181	static inline void delay(long ticks)
	182	{
	183	schedule_timeout_uninterruptible(ticks);
	184	}
	185
a31b1d3d BF	186	/*
	187	* XFS wrapper structure for sysfs support. It depends on external data
	188	* structures and is embedded in various internal data structures to implement
	189	* the XFS sysfs object heirarchy. Define it here for broad access throughout
	190	* the codebase.
	191	*/
	192	struct xfs_kobj {
	193	struct kobject kobject;
	194	struct completion complete;
	195	};
	196
c5eeb7ec DE	197	/* Kernel uid/gid conversion. These are used to convert to/from the on disk
	198	* uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
	199	* The conversion here is type only, the value will remain the same since we
	200	* are converting to the init_user_ns. The uid is later mapped to a particular
	201	* user namespace value when crossing the kernel/user boundary.
	202	*/
	203	static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
	204	{
	205	return from_kuid(&init_user_ns, uid);
	206	}
	207
	208	static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
	209	{
	210	return make_kuid(&init_user_ns, uid);
	211	}
	212
	213	static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
	214	{
	215	return from_kgid(&init_user_ns, gid);
	216	}
	217
	218	static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
	219	{
	220	return make_kgid(&init_user_ns, gid);
	221	}
	222
cde410a9 NS	223	/*
	224	* Various platform dependent calls that don't fit anywhere else
	225	*/
380b5dc0	226	#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
1da177e4	227	#define xfs_stack_trace() dump_stack()
1da177e4 LT	228
	229
	230	/* Move the kernel do_div definition off to one side */
	231
	232	#if defined __i386__
	233	/* For ia32 we need to pull some tricks to get past various versions
	234	* of the compiler which do not like us using do_div in the middle
	235	* of large functions.
	236	*/
	237	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
	238	{
	239	__u32 mod;
	240
	241	switch (n) {
	242	case 4:
	243	mod = (__u32 )a % b;
	244	(__u32 )a = (__u32 )a / b;
	245	return mod;
	246	case 8:
	247	{
	248	unsigned long __upper, __low, __high, __mod;
	249	__u64 c = (__u64 )a;
	250	__upper = __high = c >> 32;
	251	__low = c;
	252	if (__high) {
	253	__upper = __high % (b);
	254	__high = __high / (b);
	255	}
	256	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	257	asm("":"=A" (c):"a" (__low),"d" (__high));
	258	(__u64 )a = c;
	259	return __mod;
	260	}
	261	}
	262
	263	/* NOTREACHED */
	264	return 0;
	265	}
	266
	267	/* Side effect free 64 bit mod operation */
	268	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
	269	{
	270	switch (n) {
	271	case 4:
	272	return (__u32 )a % b;
	273	case 8:
	274	{
	275	unsigned long __upper, __low, __high, __mod;
	276	__u64 c = (__u64 )a;
	277	__upper = __high = c >> 32;
	278	__low = c;
	279	if (__high) {
	280	__upper = __high % (b);
	281	__high = __high / (b);
	282	}
	283	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	284	asm("":"=A" (c):"a" (__low),"d" (__high));
	285	return __mod;
	286	}
	287	}
	288
	289	/* NOTREACHED */
	290	return 0;
	291	}
292	#else
293	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
294	{
295	__u32 mod;
296
297	switch (n) {
298	case 4:
299	mod = (__u32 )a % b;
300	(__u32 )a = (__u32 )a / b;
301	return mod;
302	case 8:
303	mod = do_div((__u64 )a, b);
304	return mod;
305	}
306
307	/* NOTREACHED */
308	return 0;
309	}
310
311	/* Side effect free 64 bit mod operation */
312	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
313	{
314	switch (n) {
315	case 4:
316	return (__u32 )a % b;
317	case 8:
318	{
319	__u64 c = (__u64 )a;
320	return do_div(c, b);
321	}
322	}
323
324	/* NOTREACHED */
325	return 0;
326	}
327	#endif
328
329	#undef do_div
330	#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
331	#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
332
333	static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
334	{
335	x += y - 1;
336	do_div(x, y);
d99831ff	337	return x * y;
1da177e4 LT	338	}
1da177e4 LT	339
68c32715 NS	340	static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
	341	{
	342	x += y - 1;
	343	do_div(x, y);
	344	return x;
	345	}
	346
ae23a5e8 ES	347	/* ARM old ABI has some weird alignment/padding */
	348	#if defined(__arm__) && !defined(__ARM_EABI__)
	349	#define __arch_pack __attribute__((packed))
	350	#else
	351	#define __arch_pack
	352	#endif
	353
9130090b DC	354	#define ASSERT_ALWAYS(expr) \
	355	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
	356
742ae1e3 DC	357	#ifdef DEBUG
	358	#define ASSERT(expr) \
	359	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
9130090b DC	360
9130090b DC	361	#ifndef STATIC
742ae1e3	362	# define STATIC noinline
9130090b DC	363	#endif
9130090b DC	364
742ae1e3 DC	365	#else /* !DEBUG */
	366
	367	#ifdef XFS_WARN
9130090b DC	368
9130090b DC	369	#define ASSERT(expr) \
742ae1e3	370	(unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
9130090b DC	371
9130090b DC	372	#ifndef STATIC
742ae1e3 DC	373	# define STATIC static noinline
	374	#endif
	375
	376	#else /* !DEBUG && !XFS_WARN */
	377
	378	#define ASSERT(expr) ((void)0)
	379
	380	#ifndef STATIC
	381	# define STATIC static noinline
9130090b DC	382	#endif
9130090b DC	383
742ae1e3	384	#endif /* XFS_WARN */
9130090b DC	385	#endif /* DEBUG */
9130090b DC	386
6d3ebaae CH	387	#ifdef CONFIG_XFS_RT
	388	#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
	389	#else
	390	#define XFS_IS_REALTIME_INODE(ip) (0)
	391	#endif
	392
1da177e4	393	#endif /* __XFS_LINUX__ */