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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
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 | |
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 | ||
35 | #include <xfs_types.h> | |
1da177e4 LT |
36 | |
37 | #include <kmem.h> | |
38 | #include <mrlock.h> | |
1da177e4 LT |
39 | #include <time.h> |
40 | ||
1da177e4 LT |
41 | #include <support/uuid.h> |
42 | ||
ab4a9b04 | 43 | #include <linux/semaphore.h> |
1da177e4 LT |
44 | #include <linux/mm.h> |
45 | #include <linux/kernel.h> | |
46 | #include <linux/blkdev.h> | |
47 | #include <linux/slab.h> | |
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> |
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> |
8a072a4d | 72 | #include <linux/list_sort.h> |
1da177e4 LT |
73 | |
74 | #include <asm/page.h> | |
75 | #include <asm/div64.h> | |
76 | #include <asm/param.h> | |
77 | #include <asm/uaccess.h> | |
78 | #include <asm/byteorder.h> | |
79 | #include <asm/unaligned.h> | |
80 | ||
1da177e4 LT |
81 | #include <xfs_vnode.h> |
82 | #include <xfs_stats.h> | |
83 | #include <xfs_sysctl.h> | |
84 | #include <xfs_iops.h> | |
0829c360 | 85 | #include <xfs_aops.h> |
1da177e4 | 86 | #include <xfs_super.h> |
1da177e4 | 87 | #include <xfs_buf.h> |
10e38391 | 88 | #include <xfs_message.h> |
1da177e4 | 89 | |
218106a1 CH |
90 | #ifdef __BIG_ENDIAN |
91 | #define XFS_NATIVE_HOST 1 | |
92 | #else | |
93 | #undef XFS_NATIVE_HOST | |
94 | #endif | |
95 | ||
1da177e4 LT |
96 | /* |
97 | * Feature macros (disable/enable) | |
98 | */ | |
d2c32edf | 99 | #ifdef CONFIG_SMP |
8d280b98 DC |
100 | #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ |
101 | #else | |
102 | #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ | |
103 | #endif | |
1da177e4 | 104 | |
1da177e4 LT |
105 | #define irix_sgid_inherit xfs_params.sgid_inherit.val |
106 | #define irix_symlink_mode xfs_params.symlink_mode.val | |
107 | #define xfs_panic_mask xfs_params.panic_mask.val | |
108 | #define xfs_error_level xfs_params.error_level.val | |
109 | #define xfs_syncd_centisecs xfs_params.syncd_timer.val | |
110 | #define xfs_stats_clear xfs_params.stats_clear.val | |
111 | #define xfs_inherit_sync xfs_params.inherit_sync.val | |
112 | #define xfs_inherit_nodump xfs_params.inherit_nodump.val | |
113 | #define xfs_inherit_noatime xfs_params.inherit_noatim.val | |
114 | #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val | |
115 | #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val | |
116 | #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val | |
117 | #define xfs_rotorstep xfs_params.rotorstep.val | |
d3446eac | 118 | #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val |
2a82b8be | 119 | #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val |
1da177e4 | 120 | |
59c1b082 | 121 | #define current_cpu() (raw_smp_processor_id()) |
1da177e4 | 122 | #define current_pid() (current->pid) |
59c1b082 | 123 | #define current_test_flags(f) (current->flags & (f)) |
59c1b082 NS |
124 | #define current_set_flags_nested(sp, f) \ |
125 | (*(sp) = current->flags, current->flags |= (f)) | |
126 | #define current_clear_flags_nested(sp, f) \ | |
127 | (*(sp) = current->flags, current->flags &= ~(f)) | |
128 | #define current_restore_flags_nested(sp, f) \ | |
129 | (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) | |
1da177e4 | 130 | |
007c61c6 ES |
131 | #define spinlock_destroy(lock) |
132 | ||
1da177e4 | 133 | #define NBBY 8 /* number of bits per byte */ |
1da177e4 LT |
134 | |
135 | /* | |
136 | * Size of block device i/o is parameterized here. | |
137 | * Currently the system supports page-sized i/o. | |
138 | */ | |
e6a4b37f | 139 | #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT |
1da177e4 LT |
140 | #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) |
141 | /* number of BB's per block device block */ | |
142 | #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) | |
143 | ||
1da177e4 | 144 | #define ENOATTR ENODATA /* Attribute not found */ |
da2f4d67 NS |
145 | #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ |
146 | #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ | |
1da177e4 LT |
147 | |
148 | #define SYNCHRONIZE() barrier() | |
149 | #define __return_address __builtin_return_address(0) | |
150 | ||
6743099c | 151 | #define XFS_PROJID_DEFAULT 0 |
1da177e4 LT |
152 | #define MAXPATHLEN 1024 |
153 | ||
154 | #define MIN(a,b) (min(a,b)) | |
155 | #define MAX(a,b) (max(a,b)) | |
156 | #define howmany(x, y) (((x)+((y)-1))/(y)) | |
1da177e4 | 157 | |
cde410a9 NS |
158 | /* |
159 | * Various platform dependent calls that don't fit anywhere else | |
160 | */ | |
380b5dc0 | 161 | #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) |
1da177e4 | 162 | #define xfs_stack_trace() dump_stack() |
1da177e4 LT |
163 | |
164 | ||
165 | /* Move the kernel do_div definition off to one side */ | |
166 | ||
167 | #if defined __i386__ | |
168 | /* For ia32 we need to pull some tricks to get past various versions | |
169 | * of the compiler which do not like us using do_div in the middle | |
170 | * of large functions. | |
171 | */ | |
172 | static inline __u32 xfs_do_div(void *a, __u32 b, int n) | |
173 | { | |
174 | __u32 mod; | |
175 | ||
176 | switch (n) { | |
177 | case 4: | |
178 | mod = *(__u32 *)a % b; | |
179 | *(__u32 *)a = *(__u32 *)a / b; | |
180 | return mod; | |
181 | case 8: | |
182 | { | |
183 | unsigned long __upper, __low, __high, __mod; | |
184 | __u64 c = *(__u64 *)a; | |
185 | __upper = __high = c >> 32; | |
186 | __low = c; | |
187 | if (__high) { | |
188 | __upper = __high % (b); | |
189 | __high = __high / (b); | |
190 | } | |
191 | asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); | |
192 | asm("":"=A" (c):"a" (__low),"d" (__high)); | |
193 | *(__u64 *)a = c; | |
194 | return __mod; | |
195 | } | |
196 | } | |
197 | ||
198 | /* NOTREACHED */ | |
199 | return 0; | |
200 | } | |
201 | ||
202 | /* Side effect free 64 bit mod operation */ | |
203 | static inline __u32 xfs_do_mod(void *a, __u32 b, int n) | |
204 | { | |
205 | switch (n) { | |
206 | case 4: | |
207 | return *(__u32 *)a % b; | |
208 | case 8: | |
209 | { | |
210 | unsigned long __upper, __low, __high, __mod; | |
211 | __u64 c = *(__u64 *)a; | |
212 | __upper = __high = c >> 32; | |
213 | __low = c; | |
214 | if (__high) { | |
215 | __upper = __high % (b); | |
216 | __high = __high / (b); | |
217 | } | |
218 | asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); | |
219 | asm("":"=A" (c):"a" (__low),"d" (__high)); | |
220 | return __mod; | |
221 | } | |
222 | } | |
223 | ||
224 | /* NOTREACHED */ | |
225 | return 0; | |
226 | } | |
227 | #else | |
228 | static inline __u32 xfs_do_div(void *a, __u32 b, int n) | |
229 | { | |
230 | __u32 mod; | |
231 | ||
232 | switch (n) { | |
233 | case 4: | |
234 | mod = *(__u32 *)a % b; | |
235 | *(__u32 *)a = *(__u32 *)a / b; | |
236 | return mod; | |
237 | case 8: | |
238 | mod = do_div(*(__u64 *)a, b); | |
239 | return mod; | |
240 | } | |
241 | ||
242 | /* NOTREACHED */ | |
243 | return 0; | |
244 | } | |
245 | ||
246 | /* Side effect free 64 bit mod operation */ | |
247 | static inline __u32 xfs_do_mod(void *a, __u32 b, int n) | |
248 | { | |
249 | switch (n) { | |
250 | case 4: | |
251 | return *(__u32 *)a % b; | |
252 | case 8: | |
253 | { | |
254 | __u64 c = *(__u64 *)a; | |
255 | return do_div(c, b); | |
256 | } | |
257 | } | |
258 | ||
259 | /* NOTREACHED */ | |
260 | return 0; | |
261 | } | |
262 | #endif | |
263 | ||
264 | #undef do_div | |
265 | #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) | |
266 | #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) | |
267 | ||
268 | static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) | |
269 | { | |
270 | x += y - 1; | |
271 | do_div(x, y); | |
272 | return(x * y); | |
273 | } | |
274 | ||
68c32715 NS |
275 | static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) |
276 | { | |
277 | x += y - 1; | |
278 | do_div(x, y); | |
279 | return x; | |
280 | } | |
281 | ||
ae23a5e8 ES |
282 | /* ARM old ABI has some weird alignment/padding */ |
283 | #if defined(__arm__) && !defined(__ARM_EABI__) | |
284 | #define __arch_pack __attribute__((packed)) | |
285 | #else | |
286 | #define __arch_pack | |
287 | #endif | |
288 | ||
9130090b DC |
289 | #define ASSERT_ALWAYS(expr) \ |
290 | (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) | |
291 | ||
292 | #ifndef DEBUG | |
293 | #define ASSERT(expr) ((void)0) | |
294 | ||
295 | #ifndef STATIC | |
296 | # define STATIC static noinline | |
297 | #endif | |
298 | ||
299 | #else /* DEBUG */ | |
300 | ||
301 | #define ASSERT(expr) \ | |
302 | (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) | |
303 | ||
304 | #ifndef STATIC | |
305 | # define STATIC noinline | |
306 | #endif | |
307 | ||
308 | #endif /* DEBUG */ | |
309 | ||
1da177e4 | 310 | #endif /* __XFS_LINUX__ */ |