aboutsummaryrefslogtreecommitdiffstats
path: root/fs/xfs/linux-2.6/xfs_linux.h
blob: 096494997747da5904ed71a9af24d70c1555106e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
/*
 * 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 <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 <linux/capability.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>

/*
 * 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 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

#endif /* __XFS_LINUX__ */