Commit | Line | Data |
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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 LT |
26 | */ |
27 | #if defined(CONFIG_LBD) || (BITS_PER_LONG == 64) | |
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> | |
36 | #include <xfs_arch.h> | |
37 | ||
38 | #include <kmem.h> | |
39 | #include <mrlock.h> | |
1da177e4 LT |
40 | #include <sv.h> |
41 | #include <mutex.h> | |
1da177e4 LT |
42 | #include <time.h> |
43 | ||
1da177e4 LT |
44 | #include <support/ktrace.h> |
45 | #include <support/debug.h> | |
1da177e4 LT |
46 | #include <support/uuid.h> |
47 | ||
ab4a9b04 | 48 | #include <linux/semaphore.h> |
1da177e4 LT |
49 | #include <linux/mm.h> |
50 | #include <linux/kernel.h> | |
51 | #include <linux/blkdev.h> | |
52 | #include <linux/slab.h> | |
53 | #include <linux/module.h> | |
54 | #include <linux/file.h> | |
55 | #include <linux/swap.h> | |
56 | #include <linux/errno.h> | |
57 | #include <linux/sched.h> | |
58 | #include <linux/bitops.h> | |
59 | #include <linux/major.h> | |
60 | #include <linux/pagemap.h> | |
61 | #include <linux/vfs.h> | |
62 | #include <linux/seq_file.h> | |
63 | #include <linux/init.h> | |
64 | #include <linux/list.h> | |
65 | #include <linux/proc_fs.h> | |
1da177e4 | 66 | #include <linux/sort.h> |
e8234a68 DC |
67 | #include <linux/cpu.h> |
68 | #include <linux/notifier.h> | |
01e1b69c | 69 | #include <linux/delay.h> |
af3a2e8a | 70 | #include <linux/log2.h> |
007c61c6 | 71 | #include <linux/spinlock.h> |
64275ea4 | 72 | #include <linux/random.h> |
189f4bf2 | 73 | #include <linux/ctype.h> |
6bfb3d06 | 74 | #include <linux/writeback.h> |
1da177e4 LT |
75 | |
76 | #include <asm/page.h> | |
77 | #include <asm/div64.h> | |
78 | #include <asm/param.h> | |
79 | #include <asm/uaccess.h> | |
80 | #include <asm/byteorder.h> | |
81 | #include <asm/unaligned.h> | |
82 | ||
1da177e4 LT |
83 | #include <xfs_cred.h> |
84 | #include <xfs_vnode.h> | |
85 | #include <xfs_stats.h> | |
86 | #include <xfs_sysctl.h> | |
87 | #include <xfs_iops.h> | |
0829c360 | 88 | #include <xfs_aops.h> |
1da177e4 LT |
89 | #include <xfs_super.h> |
90 | #include <xfs_globals.h> | |
91 | #include <xfs_fs_subr.h> | |
92 | #include <xfs_lrw.h> | |
93 | #include <xfs_buf.h> | |
94 | ||
95 | /* | |
96 | * Feature macros (disable/enable) | |
97 | */ | |
d2c32edf | 98 | #ifdef CONFIG_SMP |
8d280b98 DC |
99 | #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ |
100 | #else | |
101 | #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ | |
102 | #endif | |
1da177e4 | 103 | |
1da177e4 LT |
104 | #define irix_sgid_inherit xfs_params.sgid_inherit.val |
105 | #define irix_symlink_mode xfs_params.symlink_mode.val | |
106 | #define xfs_panic_mask xfs_params.panic_mask.val | |
107 | #define xfs_error_level xfs_params.error_level.val | |
108 | #define xfs_syncd_centisecs xfs_params.syncd_timer.val | |
109 | #define xfs_stats_clear xfs_params.stats_clear.val | |
110 | #define xfs_inherit_sync xfs_params.inherit_sync.val | |
111 | #define xfs_inherit_nodump xfs_params.inherit_nodump.val | |
112 | #define xfs_inherit_noatime xfs_params.inherit_noatim.val | |
113 | #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val | |
114 | #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val | |
115 | #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val | |
116 | #define xfs_rotorstep xfs_params.rotorstep.val | |
d3446eac | 117 | #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val |
2a82b8be | 118 | #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val |
1da177e4 | 119 | |
59c1b082 | 120 | #define current_cpu() (raw_smp_processor_id()) |
1da177e4 | 121 | #define current_pid() (current->pid) |
59c1b082 | 122 | #define current_test_flags(f) (current->flags & (f)) |
59c1b082 NS |
123 | #define current_set_flags_nested(sp, f) \ |
124 | (*(sp) = current->flags, current->flags |= (f)) | |
125 | #define current_clear_flags_nested(sp, f) \ | |
126 | (*(sp) = current->flags, current->flags &= ~(f)) | |
127 | #define current_restore_flags_nested(sp, f) \ | |
128 | (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) | |
1da177e4 | 129 | |
007c61c6 ES |
130 | #define spinlock_destroy(lock) |
131 | ||
1da177e4 | 132 | #define NBBY 8 /* number of bits per byte */ |
1da177e4 LT |
133 | |
134 | /* | |
135 | * Size of block device i/o is parameterized here. | |
136 | * Currently the system supports page-sized i/o. | |
137 | */ | |
e6a4b37f | 138 | #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT |
1da177e4 LT |
139 | #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) |
140 | /* number of BB's per block device block */ | |
141 | #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) | |
142 | ||
1da177e4 | 143 | #define ENOATTR ENODATA /* Attribute not found */ |
da2f4d67 NS |
144 | #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ |
145 | #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ | |
1da177e4 LT |
146 | |
147 | #define SYNCHRONIZE() barrier() | |
148 | #define __return_address __builtin_return_address(0) | |
149 | ||
6b3f6b5b | 150 | #define dfltprid 0 |
1da177e4 LT |
151 | #define MAXPATHLEN 1024 |
152 | ||
153 | #define MIN(a,b) (min(a,b)) | |
154 | #define MAX(a,b) (max(a,b)) | |
155 | #define howmany(x, y) (((x)+((y)-1))/(y)) | |
1da177e4 | 156 | |
cde410a9 NS |
157 | /* |
158 | * Various platform dependent calls that don't fit anywhere else | |
159 | */ | |
380b5dc0 | 160 | #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) |
1da177e4 | 161 | #define xfs_stack_trace() dump_stack() |
1da177e4 | 162 | #define xfs_itruncate_data(ip, off) \ |
863890cd | 163 | (-vmtruncate(VFS_I(ip), (off))) |
1da177e4 LT |
164 | |
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 | */ | |
173 | static 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 */ | |
204 | static 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 | |
229 | static 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 */ | |
248 | static 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 | ||
269 | static 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 | ||
68c32715 NS |
276 | static 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 | ||
ae23a5e8 ES |
283 | /* 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 | ||
1da177e4 | 290 | #endif /* __XFS_LINUX__ */ |