[linux.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>

/*
 * 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 "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 <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_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 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))

/*
 * 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__))

#ifndef DEBUG
#define ASSERT(expr)	((void)0)

#ifndef STATIC
# define STATIC static noinline
#endif

#else /* DEBUG */

#define ASSERT(expr)	\
	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))

#ifndef STATIC
# define STATIC noinline
#endif

#endif /* DEBUG */

#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
06f8e2d6	35	#include "xfs_types.h"
1da177e4	36
06f8e2d6 AE	37	#include "kmem.h"
	38	#include "mrlock.h"
	39	#include "time.h"
	40	#include "uuid.h"
1da177e4	41
ab4a9b04	42	#include <linux/semaphore.h>
1da177e4 LT	43	#include <linux/mm.h>
	44	#include <linux/kernel.h>
	45	#include <linux/blkdev.h>
	46	#include <linux/slab.h>
bc02e869	47	#include <linux/crc32c.h>
1da177e4	48	#include <linux/module.h>
a0b0b8a5	49	#include <linux/mutex.h>
1da177e4 LT	50	#include <linux/file.h>
	51	#include <linux/swap.h>
	52	#include <linux/errno.h>
	53	#include <linux/sched.h>
	54	#include <linux/bitops.h>
	55	#include <linux/major.h>
	56	#include <linux/pagemap.h>
	57	#include <linux/vfs.h>
	58	#include <linux/seq_file.h>
	59	#include <linux/init.h>
	60	#include <linux/list.h>
	61	#include <linux/proc_fs.h>
1da177e4	62	#include <linux/sort.h>
e8234a68 DC	63	#include <linux/cpu.h>
e8234a68 DC	64	#include <linux/notifier.h>
01e1b69c	65	#include <linux/delay.h>
af3a2e8a	66	#include <linux/log2.h>
007c61c6	67	#include <linux/spinlock.h>
64275ea4	68	#include <linux/random.h>
189f4bf2	69	#include <linux/ctype.h>
6bfb3d06	70	#include <linux/writeback.h>
6c77b0ea	71	#include <linux/capability.h>
0030807c CH	72	#include <linux/kthread.h>
0030807c CH	73	#include <linux/freezer.h>
8a072a4d	74	#include <linux/list_sort.h>
1da177e4 LT	75
	76	#include <asm/page.h>
	77	#include <asm/div64.h>
	78	#include <asm/param.h>
	79	#include <asm/uaccess.h>
	80	#include <asm/byteorder.h>
	81	#include <asm/unaligned.h>
	82
06f8e2d6 AE	83	#include "xfs_vnode.h"
	84	#include "xfs_stats.h"
	85	#include "xfs_sysctl.h"
	86	#include "xfs_iops.h"
	87	#include "xfs_aops.h"
	88	#include "xfs_super.h"
	89	#include "xfs_buf.h"
	90	#include "xfs_message.h"
1da177e4	91
218106a1 CH	92	#ifdef __BIG_ENDIAN
	93	#define XFS_NATIVE_HOST 1
	94	#else
	95	#undef XFS_NATIVE_HOST
	96	#endif
	97
1da177e4 LT	98	/*
	99	* Feature macros (disable/enable)
	100	*/
d2c32edf	101	#ifdef CONFIG_SMP
8d280b98 DC	102	#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	103	#else
	104	#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
	105	#endif
1da177e4	106
1da177e4 LT	107	#define irix_sgid_inherit xfs_params.sgid_inherit.val
	108	#define irix_symlink_mode xfs_params.symlink_mode.val
	109	#define xfs_panic_mask xfs_params.panic_mask.val
	110	#define xfs_error_level xfs_params.error_level.val
	111	#define xfs_syncd_centisecs xfs_params.syncd_timer.val
	112	#define xfs_stats_clear xfs_params.stats_clear.val
	113	#define xfs_inherit_sync xfs_params.inherit_sync.val
	114	#define xfs_inherit_nodump xfs_params.inherit_nodump.val
	115	#define xfs_inherit_noatime xfs_params.inherit_noatim.val
	116	#define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
	117	#define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
	118	#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
	119	#define xfs_rotorstep xfs_params.rotorstep.val
d3446eac	120	#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
2a82b8be	121	#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
579b62fa	122	#define xfs_eofb_secs xfs_params.eofb_timer.val
1da177e4	123
59c1b082	124	#define current_cpu() (raw_smp_processor_id())
1da177e4	125	#define current_pid() (current->pid)
59c1b082	126	#define current_test_flags(f) (current->flags & (f))
59c1b082 NS	127	#define current_set_flags_nested(sp, f) \
	128	(*(sp) = current->flags, current->flags \|= (f))
	129	#define current_clear_flags_nested(sp, f) \
	130	(*(sp) = current->flags, current->flags &= ~(f))
	131	#define current_restore_flags_nested(sp, f) \
	132	(current->flags = ((current->flags & ~(f)) \| (*(sp) & (f))))
1da177e4	133
007c61c6 ES	134	#define spinlock_destroy(lock)
007c61c6 ES	135
1da177e4	136	#define NBBY 8 /* number of bits per byte */
1da177e4 LT	137
	138	/*
	139	* Size of block device i/o is parameterized here.
	140	* Currently the system supports page-sized i/o.
	141	*/
e6a4b37f	142	#define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
1da177e4 LT	143	#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
	144	/* number of BB's per block device block */
	145	#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
	146
1da177e4	147	#define ENOATTR ENODATA /* Attribute not found */
da2f4d67 NS	148	#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
da2f4d67 NS	149	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
1da177e4 LT	150
	151	#define SYNCHRONIZE() barrier()
	152	#define __return_address __builtin_return_address(0)
	153
6743099c	154	#define XFS_PROJID_DEFAULT 0
1da177e4 LT	155	#define MAXPATHLEN 1024
	156
	157	#define MIN(a,b) (min(a,b))
	158	#define MAX(a,b) (max(a,b))
	159	#define howmany(x, y) (((x)+((y)-1))/(y))
1da177e4	160
cde410a9 NS	161	/*
	162	* Various platform dependent calls that don't fit anywhere else
	163	*/
380b5dc0	164	#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
1da177e4	165	#define xfs_stack_trace() dump_stack()
1da177e4 LT	166
	167
	168	/* Move the kernel do_div definition off to one side */
	169
	170	#if defined __i386__
	171	/* For ia32 we need to pull some tricks to get past various versions
	172	* of the compiler which do not like us using do_div in the middle
	173	* of large functions.
	174	*/
	175	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
	176	{
	177	__u32 mod;
	178
	179	switch (n) {
	180	case 4:
	181	mod = (__u32 )a % b;
	182	(__u32 )a = (__u32 )a / b;
	183	return mod;
	184	case 8:
	185	{
	186	unsigned long __upper, __low, __high, __mod;
	187	__u64 c = (__u64 )a;
	188	__upper = __high = c >> 32;
	189	__low = c;
	190	if (__high) {
	191	__upper = __high % (b);
	192	__high = __high / (b);
	193	}
	194	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	195	asm("":"=A" (c):"a" (__low),"d" (__high));
	196	(__u64 )a = c;
	197	return __mod;
	198	}
	199	}
	200
	201	/* NOTREACHED */
	202	return 0;
	203	}
	204
	205	/* Side effect free 64 bit mod operation */
	206	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
	207	{
	208	switch (n) {
	209	case 4:
	210	return (__u32 )a % b;
	211	case 8:
	212	{
	213	unsigned long __upper, __low, __high, __mod;
	214	__u64 c = (__u64 )a;
	215	__upper = __high = c >> 32;
	216	__low = c;
	217	if (__high) {
	218	__upper = __high % (b);
	219	__high = __high / (b);
	220	}
	221	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	222	asm("":"=A" (c):"a" (__low),"d" (__high));
	223	return __mod;
	224	}
	225	}
	226
	227	/* NOTREACHED */
	228	return 0;
	229	}
230	#else
231	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
232	{
233	__u32 mod;
234
235	switch (n) {
236	case 4:
237	mod = (__u32 )a % b;
238	(__u32 )a = (__u32 )a / b;
239	return mod;
240	case 8:
241	mod = do_div((__u64 )a, b);
242	return mod;
243	}
244
245	/* NOTREACHED */
246	return 0;
247	}
248
249	/* Side effect free 64 bit mod operation */
250	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
251	{
252	switch (n) {
253	case 4:
254	return (__u32 )a % b;
255	case 8:
256	{
257	__u64 c = (__u64 )a;
258	return do_div(c, b);
259	}
260	}
261
262	/* NOTREACHED */
263	return 0;
264	}
265	#endif
266
267	#undef do_div
268	#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
269	#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
270
271	static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
272	{
273	x += y - 1;
274	do_div(x, y);
275	return(x * y);
276	}
277
68c32715 NS	278	static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
	279	{
	280	x += y - 1;
	281	do_div(x, y);
	282	return x;
	283	}
	284
ae23a5e8 ES	285	/* ARM old ABI has some weird alignment/padding */
	286	#if defined(__arm__) && !defined(__ARM_EABI__)
	287	#define __arch_pack __attribute__((packed))
	288	#else
	289	#define __arch_pack
	290	#endif
	291
9130090b DC	292	#define ASSERT_ALWAYS(expr) \
	293	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
	294
	295	#ifndef DEBUG
	296	#define ASSERT(expr) ((void)0)
	297
	298	#ifndef STATIC
	299	# define STATIC static noinline
	300	#endif
	301
	302	#else /* DEBUG */
	303
	304	#define ASSERT(expr) \
	305	(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
	306
	307	#ifndef STATIC
	308	# define STATIC noinline
	309	#endif
	310
	311	#endif /* DEBUG */
	312
1da177e4	313	#endif /* __XFS_LINUX__ */