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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_LINUX__
19#define __XFS_LINUX__
20
21#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
Christoph Hellwig6c31b932008-11-28 14:23:32 +110025 * XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set.
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 */
Bartlomiej Zolnierkiewicz90c699a2009-06-19 08:08:50 +020027#if defined(CONFIG_LBDAF) || (BITS_PER_LONG == 64)
Linus Torvalds1da177e2005-04-16 15:20:36 -070028# define XFS_BIG_BLKNOS 1
Christoph Hellwig6c31b932008-11-28 14:23:32 +110029# define XFS_BIG_INUMS 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#else
31# define XFS_BIG_BLKNOS 0
32# define XFS_BIG_INUMS 0
33#endif
34
Alex Elder06f8e2d2011-08-12 13:57:55 -050035#include "xfs_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Alex Elder06f8e2d2011-08-12 13:57:55 -050037#include "kmem.h"
38#include "mrlock.h"
39#include "time.h"
40#include "uuid.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
David Chinnerab4a9b02008-08-13 16:42:10 +100042#include <linux/semaphore.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/mm.h>
44#include <linux/kernel.h>
45#include <linux/blkdev.h>
46#include <linux/slab.h>
47#include <linux/module.h>
Christoph Hellwiga0b0b8a2009-03-29 09:51:00 +020048#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/file.h>
50#include <linux/swap.h>
51#include <linux/errno.h>
52#include <linux/sched.h>
53#include <linux/bitops.h>
54#include <linux/major.h>
55#include <linux/pagemap.h>
56#include <linux/vfs.h>
57#include <linux/seq_file.h>
58#include <linux/init.h>
59#include <linux/list.h>
60#include <linux/proc_fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/sort.h>
David Chinnere8234a62006-03-14 13:23:52 +110062#include <linux/cpu.h>
63#include <linux/notifier.h>
David Chinner01e1b692006-03-14 13:29:16 +110064#include <linux/delay.h>
Eric Sandeenaf3a2e82007-08-16 16:25:23 +100065#include <linux/log2.h>
Eric Sandeen007c61c2007-10-11 17:43:56 +100066#include <linux/spinlock.h>
David Chinner64275ea2008-04-30 17:11:16 +100067#include <linux/random.h>
Barry Naujok189f4bf2008-05-21 16:58:55 +100068#include <linux/ctype.h>
David Chinner6bfb3d02008-10-30 18:32:43 +110069#include <linux/writeback.h>
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +000070#include <linux/capability.h>
Christoph Hellwig00308072011-10-11 11:14:10 -040071#include <linux/kthread.h>
72#include <linux/freezer.h>
Christoph Hellwig8a072a42011-04-24 19:06:17 +000073#include <linux/list_sort.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
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
Alex Elder06f8e2d2011-08-12 13:57:55 -050082#include "xfs_vnode.h"
83#include "xfs_stats.h"
84#include "xfs_sysctl.h"
85#include "xfs_iops.h"
86#include "xfs_aops.h"
87#include "xfs_super.h"
88#include "xfs_buf.h"
89#include "xfs_message.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Christoph Hellwig218106a2011-07-08 14:35:58 +020091#ifdef __BIG_ENDIAN
92#define XFS_NATIVE_HOST 1
93#else
94#undef XFS_NATIVE_HOST
95#endif
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097/*
98 * Feature macros (disable/enable)
99 */
Nathan Scottd2c32ed2006-03-14 13:20:13 +1100100#ifdef CONFIG_SMP
David Chinner8d280b92006-03-14 13:13:09 +1100101#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
102#else
103#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
104#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106#define irix_sgid_inherit xfs_params.sgid_inherit.val
107#define irix_symlink_mode xfs_params.symlink_mode.val
108#define xfs_panic_mask xfs_params.panic_mask.val
109#define xfs_error_level xfs_params.error_level.val
110#define xfs_syncd_centisecs xfs_params.syncd_timer.val
111#define xfs_stats_clear xfs_params.stats_clear.val
112#define xfs_inherit_sync xfs_params.inherit_sync.val
113#define xfs_inherit_nodump xfs_params.inherit_nodump.val
114#define xfs_inherit_noatime xfs_params.inherit_noatim.val
115#define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
116#define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
117#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
118#define xfs_rotorstep xfs_params.rotorstep.val
Barry Naujokd3446ea2006-06-09 14:54:19 +1000119#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
David Chinner2a82b8b2007-07-11 11:09:12 +1000120#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Nathan Scott59c1b082006-06-09 14:59:13 +1000122#define current_cpu() (raw_smp_processor_id())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123#define current_pid() (current->pid)
Nathan Scott59c1b082006-06-09 14:59:13 +1000124#define current_test_flags(f) (current->flags & (f))
Nathan Scott59c1b082006-06-09 14:59:13 +1000125#define current_set_flags_nested(sp, f) \
126 (*(sp) = current->flags, current->flags |= (f))
127#define current_clear_flags_nested(sp, f) \
128 (*(sp) = current->flags, current->flags &= ~(f))
129#define current_restore_flags_nested(sp, f) \
130 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Eric Sandeen007c61c2007-10-11 17:43:56 +1000132#define spinlock_destroy(lock)
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134#define NBBY 8 /* number of bits per byte */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
136/*
137 * Size of block device i/o is parameterized here.
138 * Currently the system supports page-sized i/o.
139 */
Tim Shimmine6a4b372007-11-23 16:30:42 +1100140#define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
142/* number of BB's per block device block */
143#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145#define ENOATTR ENODATA /* Attribute not found */
Nathan Scottda2f4d62006-06-20 13:01:38 +1000146#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
147#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149#define SYNCHRONIZE() barrier()
150#define __return_address __builtin_return_address(0)
151
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000152#define XFS_PROJID_DEFAULT 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153#define MAXPATHLEN 1024
154
155#define MIN(a,b) (min(a,b))
156#define MAX(a,b) (max(a,b))
157#define howmany(x, y) (((x)+((y)-1))/(y))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Nathan Scottcde410a2005-09-05 11:47:01 +1000159/*
160 * Various platform dependent calls that don't fit anywhere else
161 */
Nathan Scott380b5dc2005-11-02 11:43:18 +1100162#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163#define xfs_stack_trace() dump_stack()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165
166/* Move the kernel do_div definition off to one side */
167
168#if defined __i386__
169/* For ia32 we need to pull some tricks to get past various versions
170 * of the compiler which do not like us using do_div in the middle
171 * of large functions.
172 */
173static inline __u32 xfs_do_div(void *a, __u32 b, int n)
174{
175 __u32 mod;
176
177 switch (n) {
178 case 4:
179 mod = *(__u32 *)a % b;
180 *(__u32 *)a = *(__u32 *)a / b;
181 return mod;
182 case 8:
183 {
184 unsigned long __upper, __low, __high, __mod;
185 __u64 c = *(__u64 *)a;
186 __upper = __high = c >> 32;
187 __low = c;
188 if (__high) {
189 __upper = __high % (b);
190 __high = __high / (b);
191 }
192 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
193 asm("":"=A" (c):"a" (__low),"d" (__high));
194 *(__u64 *)a = c;
195 return __mod;
196 }
197 }
198
199 /* NOTREACHED */
200 return 0;
201}
202
203/* Side effect free 64 bit mod operation */
204static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
205{
206 switch (n) {
207 case 4:
208 return *(__u32 *)a % b;
209 case 8:
210 {
211 unsigned long __upper, __low, __high, __mod;
212 __u64 c = *(__u64 *)a;
213 __upper = __high = c >> 32;
214 __low = c;
215 if (__high) {
216 __upper = __high % (b);
217 __high = __high / (b);
218 }
219 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
220 asm("":"=A" (c):"a" (__low),"d" (__high));
221 return __mod;
222 }
223 }
224
225 /* NOTREACHED */
226 return 0;
227}
228#else
229static inline __u32 xfs_do_div(void *a, __u32 b, int n)
230{
231 __u32 mod;
232
233 switch (n) {
234 case 4:
235 mod = *(__u32 *)a % b;
236 *(__u32 *)a = *(__u32 *)a / b;
237 return mod;
238 case 8:
239 mod = do_div(*(__u64 *)a, b);
240 return mod;
241 }
242
243 /* NOTREACHED */
244 return 0;
245}
246
247/* Side effect free 64 bit mod operation */
248static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
249{
250 switch (n) {
251 case 4:
252 return *(__u32 *)a % b;
253 case 8:
254 {
255 __u64 c = *(__u64 *)a;
256 return do_div(c, b);
257 }
258 }
259
260 /* NOTREACHED */
261 return 0;
262}
263#endif
264
265#undef do_div
266#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
267#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
268
269static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
270{
271 x += y - 1;
272 do_div(x, y);
273 return(x * y);
274}
275
Nathan Scott68c32712006-09-28 11:03:53 +1000276static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
277{
278 x += y - 1;
279 do_div(x, y);
280 return x;
281}
282
Eric Sandeenae23a5e2008-06-23 13:23:32 +1000283/* ARM old ABI has some weird alignment/padding */
284#if defined(__arm__) && !defined(__ARM_EABI__)
285#define __arch_pack __attribute__((packed))
286#else
287#define __arch_pack
288#endif
289
Dave Chinner91300902011-03-07 10:09:35 +1100290#define ASSERT_ALWAYS(expr) \
291 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
292
293#ifndef DEBUG
294#define ASSERT(expr) ((void)0)
295
296#ifndef STATIC
297# define STATIC static noinline
298#endif
299
300#else /* DEBUG */
301
302#define ASSERT(expr) \
303 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
304
305#ifndef STATIC
306# define STATIC noinline
307#endif
308
309#endif /* DEBUG */
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311#endif /* __XFS_LINUX__ */