[linux-2.6-block.git] / fs / xfs / linux-2.6 / 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>

/*
 * 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

#include <xfs_types.h>
#include <xfs_arch.h>

#include <kmem.h>
#include <mrlock.h>
#include <sv.h>
#include <time.h>

#include <support/debug.h>
#include <support/uuid.h>

#include <linux/semaphore.h>
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/slab.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 <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_cred.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_globals.h>
#include <xfs_fs_subr.h>
#include <xfs_buf.h>

/*
 * 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_buf_timer_centisecs	xfs_params.xfs_buf_timer.val
#define xfs_buf_age_centisecs	xfs_params.xfs_buf_age.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 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 dfltprid	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))

/*
 * 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()
#define xfs_itruncate_data(ip, off)	\
	(-vmtruncate(VFS_I(ip), (off)))


/* 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

#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 LT	22
1da177e4 LT	23	/*
1da177e4	24	* XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
6c31b93a	25	* XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set.
1da177e4	26	*/
90c699a9	27	#if defined(CONFIG_LBDAF) \|\| (BITS_PER_LONG == 64)
1da177e4	28	# define XFS_BIG_BLKNOS 1
6c31b93a	29	# define XFS_BIG_INUMS 1
1da177e4 LT	30	#else
	31	# define XFS_BIG_BLKNOS 0
	32	# define XFS_BIG_INUMS 0
	33	#endif
	34
	35	#include <xfs_types.h>
	36	#include <xfs_arch.h>
	37
	38	#include <kmem.h>
	39	#include <mrlock.h>
1da177e4	40	#include <sv.h>
1da177e4 LT	41	#include <time.h>
1da177e4 LT	42
1da177e4	43	#include <support/debug.h>
1da177e4 LT	44	#include <support/uuid.h>
1da177e4 LT	45
ab4a9b04	46	#include <linux/semaphore.h>
1da177e4 LT	47	#include <linux/mm.h>
	48	#include <linux/kernel.h>
	49	#include <linux/blkdev.h>
	50	#include <linux/slab.h>
	51	#include <linux/module.h>
a0b0b8a5	52	#include <linux/mutex.h>
1da177e4 LT	53	#include <linux/file.h>
	54	#include <linux/swap.h>
	55	#include <linux/errno.h>
	56	#include <linux/sched.h>
	57	#include <linux/bitops.h>
	58	#include <linux/major.h>
	59	#include <linux/pagemap.h>
	60	#include <linux/vfs.h>
	61	#include <linux/seq_file.h>
	62	#include <linux/init.h>
	63	#include <linux/list.h>
	64	#include <linux/proc_fs.h>
1da177e4	65	#include <linux/sort.h>
e8234a68 DC	66	#include <linux/cpu.h>
e8234a68 DC	67	#include <linux/notifier.h>
01e1b69c	68	#include <linux/delay.h>
af3a2e8a	69	#include <linux/log2.h>
007c61c6	70	#include <linux/spinlock.h>
64275ea4	71	#include <linux/random.h>
189f4bf2	72	#include <linux/ctype.h>
6bfb3d06	73	#include <linux/writeback.h>
1da177e4 LT	74
	75	#include <asm/page.h>
	76	#include <asm/div64.h>
	77	#include <asm/param.h>
	78	#include <asm/uaccess.h>
	79	#include <asm/byteorder.h>
	80	#include <asm/unaligned.h>
	81
1da177e4 LT	82	#include <xfs_cred.h>
	83	#include <xfs_vnode.h>
	84	#include <xfs_stats.h>
	85	#include <xfs_sysctl.h>
	86	#include <xfs_iops.h>
0829c360	87	#include <xfs_aops.h>
1da177e4 LT	88	#include <xfs_super.h>
	89	#include <xfs_globals.h>
	90	#include <xfs_fs_subr.h>
1da177e4 LT	91	#include <xfs_buf.h>
	92
	93	/*
	94	* Feature macros (disable/enable)
	95	*/
d2c32edf	96	#ifdef CONFIG_SMP
8d280b98 DC	97	#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	98	#else
	99	#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	100	#endif
1da177e4	101
1da177e4 LT	102	#define irix_sgid_inherit xfs_params.sgid_inherit.val
	103	#define irix_symlink_mode xfs_params.symlink_mode.val
	104	#define xfs_panic_mask xfs_params.panic_mask.val
	105	#define xfs_error_level xfs_params.error_level.val
	106	#define xfs_syncd_centisecs xfs_params.syncd_timer.val
	107	#define xfs_stats_clear xfs_params.stats_clear.val
	108	#define xfs_inherit_sync xfs_params.inherit_sync.val
	109	#define xfs_inherit_nodump xfs_params.inherit_nodump.val
	110	#define xfs_inherit_noatime xfs_params.inherit_noatim.val
	111	#define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
	112	#define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
	113	#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
	114	#define xfs_rotorstep xfs_params.rotorstep.val
d3446eac	115	#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
2a82b8be	116	#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
1da177e4	117
59c1b082	118	#define current_cpu() (raw_smp_processor_id())
1da177e4	119	#define current_pid() (current->pid)
59c1b082	120	#define current_test_flags(f) (current->flags & (f))
59c1b082 NS	121	#define current_set_flags_nested(sp, f) \
	122	(*(sp) = current->flags, current->flags \|= (f))
	123	#define current_clear_flags_nested(sp, f) \
	124	(*(sp) = current->flags, current->flags &= ~(f))
	125	#define current_restore_flags_nested(sp, f) \
	126	(current->flags = ((current->flags & ~(f)) \| (*(sp) & (f))))
1da177e4	127
007c61c6 ES	128	#define spinlock_destroy(lock)
007c61c6 ES	129
1da177e4	130	#define NBBY 8 /* number of bits per byte */
1da177e4 LT	131
	132	/*
	133	* Size of block device i/o is parameterized here.
	134	* Currently the system supports page-sized i/o.
	135	*/
e6a4b37f	136	#define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
1da177e4 LT	137	#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
	138	/* number of BB's per block device block */
	139	#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
	140
1da177e4	141	#define ENOATTR ENODATA /* Attribute not found */
da2f4d67 NS	142	#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
da2f4d67 NS	143	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
1da177e4 LT	144
	145	#define SYNCHRONIZE() barrier()
	146	#define __return_address __builtin_return_address(0)
	147
6b3f6b5b	148	#define dfltprid 0
1da177e4 LT	149	#define MAXPATHLEN 1024
	150
	151	#define MIN(a,b) (min(a,b))
	152	#define MAX(a,b) (max(a,b))
	153	#define howmany(x, y) (((x)+((y)-1))/(y))
1da177e4	154
cde410a9 NS	155	/*
	156	* Various platform dependent calls that don't fit anywhere else
	157	*/
380b5dc0	158	#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
1da177e4	159	#define xfs_stack_trace() dump_stack()
1da177e4	160	#define xfs_itruncate_data(ip, off) \
863890cd	161	(-vmtruncate(VFS_I(ip), (off)))
1da177e4 LT	162
	163
	164	/* Move the kernel do_div definition off to one side */
	165
	166	#if defined __i386__
	167	/* For ia32 we need to pull some tricks to get past various versions
	168	* of the compiler which do not like us using do_div in the middle
	169	* of large functions.
	170	*/
	171	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
	172	{
	173	__u32 mod;
	174
	175	switch (n) {
	176	case 4:
	177	mod = (__u32 )a % b;
	178	(__u32 )a = (__u32 )a / b;
	179	return mod;
	180	case 8:
	181	{
	182	unsigned long __upper, __low, __high, __mod;
	183	__u64 c = (__u64 )a;
	184	__upper = __high = c >> 32;
	185	__low = c;
	186	if (__high) {
	187	__upper = __high % (b);
	188	__high = __high / (b);
	189	}
	190	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	191	asm("":"=A" (c):"a" (__low),"d" (__high));
	192	(__u64 )a = c;
	193	return __mod;
	194	}
	195	}
	196
	197	/* NOTREACHED */
	198	return 0;
	199	}
	200
	201	/* Side effect free 64 bit mod operation */
	202	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
	203	{
	204	switch (n) {
	205	case 4:
	206	return (__u32 )a % b;
	207	case 8:
	208	{
	209	unsigned long __upper, __low, __high, __mod;
	210	__u64 c = (__u64 )a;
	211	__upper = __high = c >> 32;
	212	__low = c;
	213	if (__high) {
	214	__upper = __high % (b);
	215	__high = __high / (b);
	216	}
	217	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	218	asm("":"=A" (c):"a" (__low),"d" (__high));
	219	return __mod;
	220	}
	221	}
	222
	223	/* NOTREACHED */
	224	return 0;
	225	}
226	#else
227	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
228	{
229	__u32 mod;
230
231	switch (n) {
232	case 4:
233	mod = (__u32 )a % b;
234	(__u32 )a = (__u32 )a / b;
235	return mod;
236	case 8:
237	mod = do_div((__u64 )a, b);
238	return mod;
239	}
240
241	/* NOTREACHED */
242	return 0;
243	}
244
245	/* Side effect free 64 bit mod operation */
246	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
247	{
248	switch (n) {
249	case 4:
250	return (__u32 )a % b;
251	case 8:
252	{
253	__u64 c = (__u64 )a;
254	return do_div(c, b);
255	}
256	}
257
258	/* NOTREACHED */
259	return 0;
260	}
261	#endif
262
263	#undef do_div
264	#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
265	#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
266
267	static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
268	{
269	x += y - 1;
270	do_div(x, y);
271	return(x * y);
272	}
273
68c32715 NS	274	static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
	275	{
	276	x += y - 1;
	277	do_div(x, y);
	278	return x;
	279	}
	280
ae23a5e8 ES	281	/* ARM old ABI has some weird alignment/padding */
	282	#if defined(__arm__) && !defined(__ARM_EABI__)
	283	#define __arch_pack __attribute__((packed))
	284	#else
	285	#define __arch_pack
	286	#endif
	287
1da177e4	288	#endif /* __XFS_LINUX__ */