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

/*
 * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 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.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
#ifndef __XFS_LINUX__
#define __XFS_LINUX__

#include <linux/types.h>
#include <linux/config.h>

/*
 * Some types are conditional depending on the target system.
 * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
 * XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well
 * as requiring XFS_BIG_BLKNOS to be set.
 */
#if defined(CONFIG_LBD) || (BITS_PER_LONG == 64)
# define XFS_BIG_BLKNOS	1
# if BITS_PER_LONG == 64
#  define XFS_BIG_INUMS	1
# else
#  define XFS_BIG_INUMS	0
# endif
#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 <spin.h>
#include <sv.h>
#include <mutex.h>
#include <sema.h>
#include <time.h>

#include <support/qsort.h>
#include <support/ktrace.h>
#include <support/debug.h>
#include <support/move.h>
#include <support/uuid.h>

#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
#include <linux/module.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/version.h>
#include <linux/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_behavior.h>
#include <xfs_vfs.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_lrw.h>
#include <xfs_buf.h>

/*
 * Feature macros (disable/enable)
 */
#undef  HAVE_REFCACHE	/* reference cache not needed for NFS in 2.6 */
#define HAVE_SENDFILE	/* sendfile(2) exists in 2.6, but not in 2.4 */

/*
 * State flag for unwritten extent buffers.
 *
 * We need to be able to distinguish between these and delayed
 * allocate buffers within XFS.  The generic IO path code does
 * not need to distinguish - we use the BH_Delay flag for both
 * delalloc and these ondisk-uninitialised buffers.
 */
BUFFER_FNS(PrivateStart, unwritten);
static inline void set_buffer_unwritten_io(struct buffer_head *bh)
{
	bh->b_end_io = linvfs_unwritten_done;
}

#define restricted_chown	xfs_params.restrict_chown.val
#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

#ifndef raw_smp_processor_id
#define raw_smp_processor_id()	smp_processor_id()
#endif
#define current_cpu()		raw_smp_processor_id()
#define current_pid()		(current->pid)
#define current_fsuid(cred)	(current->fsuid)
#define current_fsgid(cred)	(current->fsgid)

#define NBPP		PAGE_SIZE
#define DPPSHFT		(PAGE_SHIFT - 9)
#define NDPP		(1 << (PAGE_SHIFT - 9))
#define dtop(DD)	(((DD) + NDPP - 1) >> DPPSHFT)
#define dtopt(DD)	((DD) >> DPPSHFT)
#define dpoff(DD)	((DD) & (NDPP-1))

#define NBBY		8		/* number of bits per byte */
#define	NBPC		PAGE_SIZE	/* Number of bytes per click */
#define	BPCSHIFT	PAGE_SHIFT	/* LOG2(NBPC) if exact */

/*
 * Size of block device i/o is parameterized here.
 * Currently the system supports page-sized i/o.
 */
#define	BLKDEV_IOSHIFT		BPCSHIFT
#define	BLKDEV_IOSIZE		(1<<BLKDEV_IOSHIFT)
/* number of BB's per block device block */
#define	BLKDEV_BB		BTOBB(BLKDEV_IOSIZE)

/* bytes to clicks */
#define	btoc(x)		(((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
#define	btoct(x)	((__psunsigned_t)(x)>>BPCSHIFT)
#define	btoc64(x)	(((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
#define	btoct64(x)	((__uint64_t)(x)>>BPCSHIFT)
#define	io_btoc(x)	(((__psunsigned_t)(x)+(IO_NBPC-1))>>IO_BPCSHIFT)
#define	io_btoct(x)	((__psunsigned_t)(x)>>IO_BPCSHIFT)

/* off_t bytes to clicks */
#define offtoc(x)       (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
#define offtoct(x)      ((xfs_off_t)(x)>>BPCSHIFT)

/* clicks to off_t bytes */
#define	ctooff(x)	((xfs_off_t)(x)<<BPCSHIFT)

/* clicks to bytes */
#define	ctob(x)		((__psunsigned_t)(x)<<BPCSHIFT)
#define btoct(x)        ((__psunsigned_t)(x)>>BPCSHIFT)
#define	ctob64(x)	((__uint64_t)(x)<<BPCSHIFT)
#define	io_ctob(x)	((__psunsigned_t)(x)<<IO_BPCSHIFT)

/* bytes to clicks */
#define btoc(x)         (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)

#ifndef CELL_CAPABLE
#define FSC_NOTIFY_NAME_CHANGED(vp)
#endif

#ifndef ENOATTR
#define ENOATTR		ENODATA		/* Attribute not found */
#endif

/* Note: EWRONGFS never visible outside the kernel */
#define	EWRONGFS	EINVAL		/* Mount with wrong filesystem type */

/*
 * XXX EFSCORRUPTED needs a real value in errno.h. asm-i386/errno.h won't
 *     return codes out of its known range in errno.
 * XXX Also note: needs to be < 1000 and fairly unique on Linux (mustn't
 *     conflict with any code we use already or any code a driver may use)
 * XXX Some options (currently we do #2):
 *	1/ New error code ["Filesystem is corrupted", _after_ glibc updated]
 *	2/ 990 ["Unknown error 990"]
 *	3/ EUCLEAN ["Structure needs cleaning"]
 *	4/ Convert EFSCORRUPTED to EIO [just prior to return into userspace]
 */
#define EFSCORRUPTED    990		/* Filesystem is corrupted */

#define SYNCHRONIZE()	barrier()
#define __return_address __builtin_return_address(0)

/*
 * IRIX (BSD) quotactl makes use of separate commands for user/group,
 * whereas on Linux the syscall encodes this information into the cmd
 * field (see the QCMD macro in quota.h).  These macros help keep the
 * code portable - they are not visible from the syscall interface.
 */
#define Q_XSETGQLIM	XQM_CMD(8)	/* set groups disk limits */
#define Q_XGETGQUOTA	XQM_CMD(9)	/* get groups disk limits */
#define Q_XSETPQLIM	XQM_CMD(10)	/* set projects disk limits */
#define Q_XGETPQUOTA	XQM_CMD(11)	/* get projects disk limits */

/* IRIX uses a dynamic sizing algorithm (ndquot = 200 + numprocs*2) */
/* we may well need to fine-tune this if it ever becomes an issue.  */
#define DQUOT_MAX_HEURISTIC	1024	/* NR_DQUOTS */
#define ndquot			DQUOT_MAX_HEURISTIC

/* IRIX uses the current size of the name cache to guess a good value */
/* - this isn't the same but is a good enough starting point for now. */
#define DQUOT_HASH_HEURISTIC	files_stat.nr_files

/* IRIX inodes maintain the project ID also, zero this field on Linux */
#define DEFAULT_PROJID	0
#define dfltprid	DEFAULT_PROJID

#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))
#define roundup(x, y)	((((x)+((y)-1))/(y))*(y))

#define xfs_stack_trace()	dump_stack()

#define xfs_itruncate_data(ip, off)	\
	(-vmtruncate(LINVFS_GET_IP(XFS_ITOV(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);
}

#define qsort(a, n, s, cmp) sort(a, n, s, cmp, NULL)

#endif /* __XFS_LINUX__ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of version 2 of the GNU General Public License as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it would be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	11	*
	12	* Further, this software is distributed without any warranty that it is
	13	* free of the rightful claim of any third person regarding infringement
	14	* or the like. Any license provided herein, whether implied or
	15	* otherwise, applies only to this software file. Patent licenses, if
	16	* any, provided herein do not apply to combinations of this program with
	17	* other software, or any other product whatsoever.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write the Free Software Foundation, Inc., 59
	21	* Temple Place - Suite 330, Boston MA 02111-1307, USA.
	22	*
	23	* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
	24	* Mountain View, CA 94043, or:
	25	*
	26	* http://www.sgi.com
	27	*
	28	* For further information regarding this notice, see:
	29	*
	30	* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
	31	*/
	32	#ifndef __XFS_LINUX__
	33	#define __XFS_LINUX__
	34
	35	#include <linux/types.h>
	36	#include <linux/config.h>
	37
	38	/*
	39	* Some types are conditional depending on the target system.
	40	* XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
	41	* XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well
	42	* as requiring XFS_BIG_BLKNOS to be set.
	43	*/
	44	#if defined(CONFIG_LBD) \|\| (BITS_PER_LONG == 64)
	45	# define XFS_BIG_BLKNOS 1
	46	# if BITS_PER_LONG == 64
	47	# define XFS_BIG_INUMS 1
	48	# else
	49	# define XFS_BIG_INUMS 0
	50	# endif
	51	#else
	52	# define XFS_BIG_BLKNOS 0
	53	# define XFS_BIG_INUMS 0
	54	#endif
	55
	56	#include <xfs_types.h>
	57	#include <xfs_arch.h>
	58
	59	#include <kmem.h>
	60	#include <mrlock.h>
	61	#include <spin.h>
	62	#include <sv.h>
	63	#include <mutex.h>
	64	#include <sema.h>
65	#include <time.h>
66
67	#include <support/qsort.h>
68	#include <support/ktrace.h>
69	#include <support/debug.h>
70	#include <support/move.h>
71	#include <support/uuid.h>
72
73	#include <linux/mm.h>
74	#include <linux/kernel.h>
75	#include <linux/blkdev.h>
76	#include <linux/slab.h>
77	#include <linux/module.h>
78	#include <linux/file.h>
79	#include <linux/swap.h>
80	#include <linux/errno.h>
81	#include <linux/sched.h>
82	#include <linux/bitops.h>
83	#include <linux/major.h>
84	#include <linux/pagemap.h>
85	#include <linux/vfs.h>
86	#include <linux/seq_file.h>
87	#include <linux/init.h>
88	#include <linux/list.h>
89	#include <linux/proc_fs.h>
90	#include <linux/version.h>
91	#include <linux/sort.h>
92
93	#include <asm/page.h>
94	#include <asm/div64.h>
95	#include <asm/param.h>
96	#include <asm/uaccess.h>
97	#include <asm/byteorder.h>
98	#include <asm/unaligned.h>
99
100	#include <xfs_behavior.h>
101	#include <xfs_vfs.h>
102	#include <xfs_cred.h>
103	#include <xfs_vnode.h>
104	#include <xfs_stats.h>
105	#include <xfs_sysctl.h>
106	#include <xfs_iops.h>
0829c360	107	#include <xfs_aops.h>
1da177e4 LT	108	#include <xfs_super.h>
	109	#include <xfs_globals.h>
	110	#include <xfs_fs_subr.h>
	111	#include <xfs_lrw.h>
	112	#include <xfs_buf.h>
	113
	114	/*
	115	* Feature macros (disable/enable)
	116	*/
	117	#undef HAVE_REFCACHE /* reference cache not needed for NFS in 2.6 */
	118	#define HAVE_SENDFILE /* sendfile(2) exists in 2.6, but not in 2.4 */
	119
	120	/*
	121	* State flag for unwritten extent buffers.
	122	*
	123	* We need to be able to distinguish between these and delayed
	124	* allocate buffers within XFS. The generic IO path code does
	125	* not need to distinguish - we use the BH_Delay flag for both
	126	* delalloc and these ondisk-uninitialised buffers.
	127	*/
	128	BUFFER_FNS(PrivateStart, unwritten);
	129	static inline void set_buffer_unwritten_io(struct buffer_head *bh)
	130	{
	131	bh->b_end_io = linvfs_unwritten_done;
	132	}
	133
	134	#define restricted_chown xfs_params.restrict_chown.val
	135	#define irix_sgid_inherit xfs_params.sgid_inherit.val
	136	#define irix_symlink_mode xfs_params.symlink_mode.val
	137	#define xfs_panic_mask xfs_params.panic_mask.val
	138	#define xfs_error_level xfs_params.error_level.val
	139	#define xfs_syncd_centisecs xfs_params.syncd_timer.val
	140	#define xfs_stats_clear xfs_params.stats_clear.val
	141	#define xfs_inherit_sync xfs_params.inherit_sync.val
	142	#define xfs_inherit_nodump xfs_params.inherit_nodump.val
	143	#define xfs_inherit_noatime xfs_params.inherit_noatim.val
	144	#define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
	145	#define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
	146	#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
	147	#define xfs_rotorstep xfs_params.rotorstep.val
	148
39c715b7 IM	149	#ifndef raw_smp_processor_id
39c715b7 IM	150	#define raw_smp_processor_id() smp_processor_id()
1da177e4	151	#endif
39c715b7	152	#define current_cpu() raw_smp_processor_id()
1da177e4 LT	153	#define current_pid() (current->pid)
	154	#define current_fsuid(cred) (current->fsuid)
	155	#define current_fsgid(cred) (current->fsgid)
	156
	157	#define NBPP PAGE_SIZE
	158	#define DPPSHFT (PAGE_SHIFT - 9)
	159	#define NDPP (1 << (PAGE_SHIFT - 9))
	160	#define dtop(DD) (((DD) + NDPP - 1) >> DPPSHFT)
	161	#define dtopt(DD) ((DD) >> DPPSHFT)
	162	#define dpoff(DD) ((DD) & (NDPP-1))
	163
	164	#define NBBY 8 /* number of bits per byte */
	165	#define NBPC PAGE_SIZE /* Number of bytes per click */
	166	#define BPCSHIFT PAGE_SHIFT /* LOG2(NBPC) if exact */
	167
	168	/*
	169	* Size of block device i/o is parameterized here.
	170	* Currently the system supports page-sized i/o.
	171	*/
	172	#define BLKDEV_IOSHIFT BPCSHIFT
	173	#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
	174	/* number of BB's per block device block */
	175	#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
	176
	177	/* bytes to clicks */
	178	#define btoc(x) (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
	179	#define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT)
	180	#define btoc64(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
	181	#define btoct64(x) ((__uint64_t)(x)>>BPCSHIFT)
	182	#define io_btoc(x) (((__psunsigned_t)(x)+(IO_NBPC-1))>>IO_BPCSHIFT)
	183	#define io_btoct(x) ((__psunsigned_t)(x)>>IO_BPCSHIFT)
	184
	185	/* off_t bytes to clicks */
	186	#define offtoc(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
	187	#define offtoct(x) ((xfs_off_t)(x)>>BPCSHIFT)
	188
	189	/* clicks to off_t bytes */
	190	#define ctooff(x) ((xfs_off_t)(x)<<BPCSHIFT)
	191
	192	/* clicks to bytes */
	193	#define ctob(x) ((__psunsigned_t)(x)<<BPCSHIFT)
	194	#define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT)
	195	#define ctob64(x) ((__uint64_t)(x)<<BPCSHIFT)
	196	#define io_ctob(x) ((__psunsigned_t)(x)<<IO_BPCSHIFT)
	197
	198	/* bytes to clicks */
	199	#define btoc(x) (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
	200
	201	#ifndef CELL_CAPABLE
	202	#define FSC_NOTIFY_NAME_CHANGED(vp)
	203	#endif
	204
	205	#ifndef ENOATTR
	206	#define ENOATTR ENODATA /* Attribute not found */
	207	#endif
	208
	209	/* Note: EWRONGFS never visible outside the kernel */
	210	#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
	211
	212	/*
	213	* XXX EFSCORRUPTED needs a real value in errno.h. asm-i386/errno.h won't
	214	* return codes out of its known range in errno.
	215	* XXX Also note: needs to be < 1000 and fairly unique on Linux (mustn't
	216	* conflict with any code we use already or any code a driver may use)
217	* XXX Some options (currently we do #2):
218	* 1/ New error code ["Filesystem is corrupted", _after_ glibc updated]
219	* 2/ 990 ["Unknown error 990"]
220	* 3/ EUCLEAN ["Structure needs cleaning"]
221	* 4/ Convert EFSCORRUPTED to EIO [just prior to return into userspace]
222	*/
223	#define EFSCORRUPTED 990 /* Filesystem is corrupted */
224
225	#define SYNCHRONIZE() barrier()
226	#define __return_address __builtin_return_address(0)
227
228	/*
229	* IRIX (BSD) quotactl makes use of separate commands for user/group,
230	* whereas on Linux the syscall encodes this information into the cmd
231	* field (see the QCMD macro in quota.h). These macros help keep the
232	* code portable - they are not visible from the syscall interface.
233	*/
c8ad20ff NS	234	#define Q_XSETGQLIM XQM_CMD(8) /* set groups disk limits */
	235	#define Q_XGETGQUOTA XQM_CMD(9) /* get groups disk limits */
	236	#define Q_XSETPQLIM XQM_CMD(10) /* set projects disk limits */
	237	#define Q_XGETPQUOTA XQM_CMD(11) /* get projects disk limits */
1da177e4 LT	238
	239	/* IRIX uses a dynamic sizing algorithm (ndquot = 200 + numprocs2) /
	240	/* we may well need to fine-tune this if it ever becomes an issue. */
	241	#define DQUOT_MAX_HEURISTIC 1024 /* NR_DQUOTS */
	242	#define ndquot DQUOT_MAX_HEURISTIC
	243
	244	/* IRIX uses the current size of the name cache to guess a good value */
	245	/* - this isn't the same but is a good enough starting point for now. */
	246	#define DQUOT_HASH_HEURISTIC files_stat.nr_files
	247
	248	/* IRIX inodes maintain the project ID also, zero this field on Linux */
	249	#define DEFAULT_PROJID 0
	250	#define dfltprid DEFAULT_PROJID
	251
	252	#define MAXPATHLEN 1024
	253
	254	#define MIN(a,b) (min(a,b))
	255	#define MAX(a,b) (max(a,b))
	256	#define howmany(x, y) (((x)+((y)-1))/(y))
	257	#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
	258
	259	#define xfs_stack_trace() dump_stack()
	260
	261	#define xfs_itruncate_data(ip, off) \
	262	(-vmtruncate(LINVFS_GET_IP(XFS_ITOV(ip)), (off)))
	263
	264
	265	/* Move the kernel do_div definition off to one side */
	266
	267	#if defined __i386__
	268	/* For ia32 we need to pull some tricks to get past various versions
	269	* of the compiler which do not like us using do_div in the middle
	270	* of large functions.
	271	*/
	272	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
	273	{
	274	__u32 mod;
	275
	276	switch (n) {
	277	case 4:
	278	mod = (__u32 )a % b;
	279	(__u32 )a = (__u32 )a / b;
	280	return mod;
	281	case 8:
	282	{
	283	unsigned long __upper, __low, __high, __mod;
	284	__u64 c = (__u64 )a;
	285	__upper = __high = c >> 32;
	286	__low = c;
	287	if (__high) {
	288	__upper = __high % (b);
	289	__high = __high / (b);
	290	}
	291	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
	292	asm("":"=A" (c):"a" (__low),"d" (__high));
	293	(__u64 )a = c;
	294	return __mod;
	295	}
	296	}
	297
	298	/* NOTREACHED */
	299	return 0;
	300	}
	301
302	/* Side effect free 64 bit mod operation */
303	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
304	{
305	switch (n) {
306	case 4:
307	return (__u32 )a % b;
308	case 8:
309	{
310	unsigned long __upper, __low, __high, __mod;
311	__u64 c = (__u64 )a;
312	__upper = __high = c >> 32;
313	__low = c;
314	if (__high) {
315	__upper = __high % (b);
316	__high = __high / (b);
317	}
318	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
319	asm("":"=A" (c):"a" (__low),"d" (__high));
320	return __mod;
321	}
322	}
323
324	/* NOTREACHED */
325	return 0;
326	}
327	#else
328	static inline __u32 xfs_do_div(void *a, __u32 b, int n)
329	{
330	__u32 mod;
331
332	switch (n) {
333	case 4:
334	mod = (__u32 )a % b;
335	(__u32 )a = (__u32 )a / b;
336	return mod;
337	case 8:
338	mod = do_div((__u64 )a, b);
339	return mod;
340	}
341
342	/* NOTREACHED */
343	return 0;
344	}
345
346	/* Side effect free 64 bit mod operation */
347	static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
348	{
349	switch (n) {
350	case 4:
351	return (__u32 )a % b;
352	case 8:
353	{
354	__u64 c = (__u64 )a;
355	return do_div(c, b);
356	}
357	}
358
359	/* NOTREACHED */
360	return 0;
361	}
362	#endif
363
364	#undef do_div
365	#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
366	#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
367
368	static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
369	{
370	x += y - 1;
371	do_div(x, y);
372	return(x * y);
373	}
374
375	#define qsort(a, n, s, cmp) sort(a, n, s, cmp, NULL)
376
377	#endif /* __XFS_LINUX__ */