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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
Dave Chinner4f3d71f2013-08-12 20:49:54 +100035/*
36 * Kernel specific type declarations for XFS
37 */
38typedef signed char __int8_t;
39typedef unsigned char __uint8_t;
40typedef signed short int __int16_t;
41typedef unsigned short int __uint16_t;
42typedef signed int __int32_t;
43typedef unsigned int __uint32_t;
44typedef signed long long int __int64_t;
45typedef unsigned long long int __uint64_t;
46
47typedef __uint32_t inst_t; /* an instruction */
48
49typedef __s64 xfs_off_t; /* <file offset> type */
50typedef unsigned long long xfs_ino_t; /* <inode> type */
51typedef __s64 xfs_daddr_t; /* <disk address> type */
52typedef char * xfs_caddr_t; /* <core address> type */
53typedef __u32 xfs_dev_t;
54typedef __u32 xfs_nlink_t;
55
56/* __psint_t is the same size as a pointer */
57#if (BITS_PER_LONG == 32)
58typedef __int32_t __psint_t;
59typedef __uint32_t __psunsigned_t;
60#elif (BITS_PER_LONG == 64)
61typedef __int64_t __psint_t;
62typedef __uint64_t __psunsigned_t;
63#else
64#error BITS_PER_LONG must be 32 or 64
65#endif
66
Alex Elder06f8e2d2011-08-12 13:57:55 -050067#include "xfs_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Alex Elder06f8e2d2011-08-12 13:57:55 -050069#include "kmem.h"
70#include "mrlock.h"
71#include "time.h"
72#include "uuid.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
David Chinnerab4a9b02008-08-13 16:42:10 +100074#include <linux/semaphore.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070075#include <linux/mm.h>
76#include <linux/kernel.h>
77#include <linux/blkdev.h>
78#include <linux/slab.h>
Christoph Hellwigbc02e862012-11-16 09:20:37 +110079#include <linux/crc32c.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#include <linux/module.h>
Christoph Hellwiga0b0b8a2009-03-29 09:51:00 +020081#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#include <linux/file.h>
83#include <linux/swap.h>
84#include <linux/errno.h>
85#include <linux/sched.h>
86#include <linux/bitops.h>
87#include <linux/major.h>
88#include <linux/pagemap.h>
89#include <linux/vfs.h>
90#include <linux/seq_file.h>
91#include <linux/init.h>
92#include <linux/list.h>
93#include <linux/proc_fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070094#include <linux/sort.h>
David Chinnere8234a62006-03-14 13:23:52 +110095#include <linux/cpu.h>
96#include <linux/notifier.h>
David Chinner01e1b692006-03-14 13:29:16 +110097#include <linux/delay.h>
Eric Sandeenaf3a2e82007-08-16 16:25:23 +100098#include <linux/log2.h>
Eric Sandeen007c61c2007-10-11 17:43:56 +100099#include <linux/spinlock.h>
David Chinner64275ea2008-04-30 17:11:16 +1000100#include <linux/random.h>
Barry Naujok189f4bf2008-05-21 16:58:55 +1000101#include <linux/ctype.h>
David Chinner6bfb3d02008-10-30 18:32:43 +1100102#include <linux/writeback.h>
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000103#include <linux/capability.h>
Christoph Hellwig00308072011-10-11 11:14:10 -0400104#include <linux/kthread.h>
105#include <linux/freezer.h>
Christoph Hellwig8a072a42011-04-24 19:06:17 +0000106#include <linux/list_sort.h>
Rich Johnston3d6e0362013-03-27 09:26:49 -0500107#include <linux/ratelimit.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109#include <asm/page.h>
110#include <asm/div64.h>
111#include <asm/param.h>
112#include <asm/uaccess.h>
113#include <asm/byteorder.h>
114#include <asm/unaligned.h>
115
Alex Elder06f8e2d2011-08-12 13:57:55 -0500116#include "xfs_vnode.h"
117#include "xfs_stats.h"
118#include "xfs_sysctl.h"
119#include "xfs_iops.h"
120#include "xfs_aops.h"
121#include "xfs_super.h"
122#include "xfs_buf.h"
123#include "xfs_message.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Christoph Hellwig218106a2011-07-08 14:35:58 +0200125#ifdef __BIG_ENDIAN
126#define XFS_NATIVE_HOST 1
127#else
128#undef XFS_NATIVE_HOST
129#endif
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131/*
132 * Feature macros (disable/enable)
133 */
Nathan Scottd2c32ed2006-03-14 13:20:13 +1100134#ifdef CONFIG_SMP
David Chinner8d280b92006-03-14 13:13:09 +1100135#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
136#else
137#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
138#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140#define irix_sgid_inherit xfs_params.sgid_inherit.val
141#define irix_symlink_mode xfs_params.symlink_mode.val
142#define xfs_panic_mask xfs_params.panic_mask.val
143#define xfs_error_level xfs_params.error_level.val
144#define xfs_syncd_centisecs xfs_params.syncd_timer.val
145#define xfs_stats_clear xfs_params.stats_clear.val
146#define xfs_inherit_sync xfs_params.inherit_sync.val
147#define xfs_inherit_nodump xfs_params.inherit_nodump.val
148#define xfs_inherit_noatime xfs_params.inherit_noatim.val
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
150#define xfs_rotorstep xfs_params.rotorstep.val
Barry Naujokd3446ea2006-06-09 14:54:19 +1000151#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
David Chinner2a82b8b2007-07-11 11:09:12 +1000152#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
Brian Foster579b62f2012-11-06 09:50:47 -0500153#define xfs_eofb_secs xfs_params.eofb_timer.val
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Nathan Scott59c1b082006-06-09 14:59:13 +1000155#define current_cpu() (raw_smp_processor_id())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156#define current_pid() (current->pid)
Nathan Scott59c1b082006-06-09 14:59:13 +1000157#define current_test_flags(f) (current->flags & (f))
Nathan Scott59c1b082006-06-09 14:59:13 +1000158#define current_set_flags_nested(sp, f) \
159 (*(sp) = current->flags, current->flags |= (f))
160#define current_clear_flags_nested(sp, f) \
161 (*(sp) = current->flags, current->flags &= ~(f))
162#define current_restore_flags_nested(sp, f) \
163 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Eric Sandeen007c61c2007-10-11 17:43:56 +1000165#define spinlock_destroy(lock)
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167#define NBBY 8 /* number of bits per byte */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169/*
170 * Size of block device i/o is parameterized here.
171 * Currently the system supports page-sized i/o.
172 */
Tim Shimmine6a4b372007-11-23 16:30:42 +1100173#define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
175/* number of BB's per block device block */
176#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178#define ENOATTR ENODATA /* Attribute not found */
Nathan Scottda2f4d62006-06-20 13:01:38 +1000179#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
180#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182#define SYNCHRONIZE() barrier()
183#define __return_address __builtin_return_address(0)
184
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000185#define XFS_PROJID_DEFAULT 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186#define MAXPATHLEN 1024
187
188#define MIN(a,b) (min(a,b))
189#define MAX(a,b) (max(a,b))
190#define howmany(x, y) (((x)+((y)-1))/(y))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Dwight Engenc5eeb7e2013-08-15 14:07:58 -0400192/* Kernel uid/gid conversion. These are used to convert to/from the on disk
193 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
194 * The conversion here is type only, the value will remain the same since we
195 * are converting to the init_user_ns. The uid is later mapped to a particular
196 * user namespace value when crossing the kernel/user boundary.
197 */
198static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
199{
200 return from_kuid(&init_user_ns, uid);
201}
202
203static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
204{
205 return make_kuid(&init_user_ns, uid);
206}
207
208static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
209{
210 return from_kgid(&init_user_ns, gid);
211}
212
213static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
214{
215 return make_kgid(&init_user_ns, gid);
216}
217
Nathan Scottcde410a2005-09-05 11:47:01 +1000218/*
219 * Various platform dependent calls that don't fit anywhere else
220 */
Nathan Scott380b5dc2005-11-02 11:43:18 +1100221#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222#define xfs_stack_trace() dump_stack()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224
225/* Move the kernel do_div definition off to one side */
226
227#if defined __i386__
228/* For ia32 we need to pull some tricks to get past various versions
229 * of the compiler which do not like us using do_div in the middle
230 * of large functions.
231 */
232static inline __u32 xfs_do_div(void *a, __u32 b, int n)
233{
234 __u32 mod;
235
236 switch (n) {
237 case 4:
238 mod = *(__u32 *)a % b;
239 *(__u32 *)a = *(__u32 *)a / b;
240 return mod;
241 case 8:
242 {
243 unsigned long __upper, __low, __high, __mod;
244 __u64 c = *(__u64 *)a;
245 __upper = __high = c >> 32;
246 __low = c;
247 if (__high) {
248 __upper = __high % (b);
249 __high = __high / (b);
250 }
251 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
252 asm("":"=A" (c):"a" (__low),"d" (__high));
253 *(__u64 *)a = c;
254 return __mod;
255 }
256 }
257
258 /* NOTREACHED */
259 return 0;
260}
261
262/* Side effect free 64 bit mod operation */
263static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
264{
265 switch (n) {
266 case 4:
267 return *(__u32 *)a % b;
268 case 8:
269 {
270 unsigned long __upper, __low, __high, __mod;
271 __u64 c = *(__u64 *)a;
272 __upper = __high = c >> 32;
273 __low = c;
274 if (__high) {
275 __upper = __high % (b);
276 __high = __high / (b);
277 }
278 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
279 asm("":"=A" (c):"a" (__low),"d" (__high));
280 return __mod;
281 }
282 }
283
284 /* NOTREACHED */
285 return 0;
286}
287#else
288static inline __u32 xfs_do_div(void *a, __u32 b, int n)
289{
290 __u32 mod;
291
292 switch (n) {
293 case 4:
294 mod = *(__u32 *)a % b;
295 *(__u32 *)a = *(__u32 *)a / b;
296 return mod;
297 case 8:
298 mod = do_div(*(__u64 *)a, b);
299 return mod;
300 }
301
302 /* NOTREACHED */
303 return 0;
304}
305
306/* Side effect free 64 bit mod operation */
307static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
308{
309 switch (n) {
310 case 4:
311 return *(__u32 *)a % b;
312 case 8:
313 {
314 __u64 c = *(__u64 *)a;
315 return do_div(c, b);
316 }
317 }
318
319 /* NOTREACHED */
320 return 0;
321}
322#endif
323
324#undef do_div
325#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
326#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
327
328static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
329{
330 x += y - 1;
331 do_div(x, y);
332 return(x * y);
333}
334
Nathan Scott68c32712006-09-28 11:03:53 +1000335static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
336{
337 x += y - 1;
338 do_div(x, y);
339 return x;
340}
341
Eric Sandeenae23a5e2008-06-23 13:23:32 +1000342/* ARM old ABI has some weird alignment/padding */
343#if defined(__arm__) && !defined(__ARM_EABI__)
344#define __arch_pack __attribute__((packed))
345#else
346#define __arch_pack
347#endif
348
Dave Chinner91300902011-03-07 10:09:35 +1100349#define ASSERT_ALWAYS(expr) \
350 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
351
Dave Chinner742ae1e2013-04-30 21:39:34 +1000352#ifdef DEBUG
Dave Chinner91300902011-03-07 10:09:35 +1100353#define ASSERT(expr) \
354 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
355
356#ifndef STATIC
357# define STATIC noinline
358#endif
359
Dave Chinner742ae1e2013-04-30 21:39:34 +1000360#else /* !DEBUG */
361
362#ifdef XFS_WARN
363
364#define ASSERT(expr) \
365 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
366
367#ifndef STATIC
368# define STATIC static noinline
369#endif
370
371#else /* !DEBUG && !XFS_WARN */
372
373#define ASSERT(expr) ((void)0)
374
375#ifndef STATIC
376# define STATIC static noinline
377#endif
378
379#endif /* XFS_WARN */
Dave Chinner91300902011-03-07 10:09:35 +1100380#endif /* DEBUG */
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382#endif /* __XFS_LINUX__ */