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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 | /* | |
24 | * Some types are conditional depending on the target system. | |
25 | * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits. | |
26 | * XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well | |
27 | * as requiring XFS_BIG_BLKNOS to be set. | |
28 | */ | |
29 | #if defined(CONFIG_LBD) || (BITS_PER_LONG == 64) | |
30 | # define XFS_BIG_BLKNOS 1 | |
31 | # if BITS_PER_LONG == 64 | |
32 | # define XFS_BIG_INUMS 1 | |
33 | # else | |
34 | # define XFS_BIG_INUMS 0 | |
35 | # endif | |
36 | #else | |
37 | # define XFS_BIG_BLKNOS 0 | |
38 | # define XFS_BIG_INUMS 0 | |
39 | #endif | |
40 | ||
41 | #include <xfs_types.h> | |
42 | #include <xfs_arch.h> | |
43 | ||
44 | #include <kmem.h> | |
45 | #include <mrlock.h> | |
1da177e4 LT |
46 | #include <sv.h> |
47 | #include <mutex.h> | |
48 | #include <sema.h> | |
49 | #include <time.h> | |
50 | ||
1da177e4 LT |
51 | #include <support/ktrace.h> |
52 | #include <support/debug.h> | |
1da177e4 LT |
53 | #include <support/uuid.h> |
54 | ||
55 | #include <linux/mm.h> | |
56 | #include <linux/kernel.h> | |
57 | #include <linux/blkdev.h> | |
58 | #include <linux/slab.h> | |
59 | #include <linux/module.h> | |
60 | #include <linux/file.h> | |
61 | #include <linux/swap.h> | |
62 | #include <linux/errno.h> | |
63 | #include <linux/sched.h> | |
64 | #include <linux/bitops.h> | |
65 | #include <linux/major.h> | |
66 | #include <linux/pagemap.h> | |
67 | #include <linux/vfs.h> | |
68 | #include <linux/seq_file.h> | |
69 | #include <linux/init.h> | |
70 | #include <linux/list.h> | |
71 | #include <linux/proc_fs.h> | |
1da177e4 | 72 | #include <linux/sort.h> |
e8234a68 DC |
73 | #include <linux/cpu.h> |
74 | #include <linux/notifier.h> | |
01e1b69c | 75 | #include <linux/delay.h> |
af3a2e8a | 76 | #include <linux/log2.h> |
007c61c6 | 77 | #include <linux/spinlock.h> |
64275ea4 | 78 | #include <linux/random.h> |
1da177e4 LT |
79 | |
80 | #include <asm/page.h> | |
81 | #include <asm/div64.h> | |
82 | #include <asm/param.h> | |
83 | #include <asm/uaccess.h> | |
84 | #include <asm/byteorder.h> | |
85 | #include <asm/unaligned.h> | |
86 | ||
1da177e4 LT |
87 | #include <xfs_vfs.h> |
88 | #include <xfs_cred.h> | |
89 | #include <xfs_vnode.h> | |
90 | #include <xfs_stats.h> | |
91 | #include <xfs_sysctl.h> | |
92 | #include <xfs_iops.h> | |
0829c360 | 93 | #include <xfs_aops.h> |
1da177e4 LT |
94 | #include <xfs_super.h> |
95 | #include <xfs_globals.h> | |
96 | #include <xfs_fs_subr.h> | |
97 | #include <xfs_lrw.h> | |
98 | #include <xfs_buf.h> | |
99 | ||
100 | /* | |
101 | * Feature macros (disable/enable) | |
102 | */ | |
d2c32edf | 103 | #ifdef CONFIG_SMP |
8d280b98 DC |
104 | #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ |
105 | #else | |
106 | #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ | |
107 | #endif | |
1da177e4 | 108 | |
1da177e4 LT |
109 | #define restricted_chown xfs_params.restrict_chown.val |
110 | #define irix_sgid_inherit xfs_params.sgid_inherit.val | |
111 | #define irix_symlink_mode xfs_params.symlink_mode.val | |
112 | #define xfs_panic_mask xfs_params.panic_mask.val | |
113 | #define xfs_error_level xfs_params.error_level.val | |
114 | #define xfs_syncd_centisecs xfs_params.syncd_timer.val | |
115 | #define xfs_stats_clear xfs_params.stats_clear.val | |
116 | #define xfs_inherit_sync xfs_params.inherit_sync.val | |
117 | #define xfs_inherit_nodump xfs_params.inherit_nodump.val | |
118 | #define xfs_inherit_noatime xfs_params.inherit_noatim.val | |
119 | #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val | |
120 | #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val | |
121 | #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val | |
122 | #define xfs_rotorstep xfs_params.rotorstep.val | |
d3446eac | 123 | #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val |
2a82b8be | 124 | #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val |
1da177e4 | 125 | |
59c1b082 | 126 | #define current_cpu() (raw_smp_processor_id()) |
1da177e4 LT |
127 | #define current_pid() (current->pid) |
128 | #define current_fsuid(cred) (current->fsuid) | |
129 | #define current_fsgid(cred) (current->fsgid) | |
59c1b082 | 130 | #define current_test_flags(f) (current->flags & (f)) |
59c1b082 NS |
131 | #define current_set_flags_nested(sp, f) \ |
132 | (*(sp) = current->flags, current->flags |= (f)) | |
133 | #define current_clear_flags_nested(sp, f) \ | |
134 | (*(sp) = current->flags, current->flags &= ~(f)) | |
135 | #define current_restore_flags_nested(sp, f) \ | |
136 | (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) | |
1da177e4 | 137 | |
007c61c6 ES |
138 | #define spinlock_destroy(lock) |
139 | ||
1da177e4 | 140 | #define NBBY 8 /* number of bits per byte */ |
1da177e4 LT |
141 | |
142 | /* | |
143 | * Size of block device i/o is parameterized here. | |
144 | * Currently the system supports page-sized i/o. | |
145 | */ | |
e6a4b37f | 146 | #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT |
1da177e4 LT |
147 | #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) |
148 | /* number of BB's per block device block */ | |
149 | #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) | |
150 | ||
1da177e4 | 151 | #define ENOATTR ENODATA /* Attribute not found */ |
da2f4d67 NS |
152 | #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ |
153 | #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ | |
1da177e4 LT |
154 | |
155 | #define SYNCHRONIZE() barrier() | |
156 | #define __return_address __builtin_return_address(0) | |
157 | ||
158 | /* | |
159 | * IRIX (BSD) quotactl makes use of separate commands for user/group, | |
160 | * whereas on Linux the syscall encodes this information into the cmd | |
161 | * field (see the QCMD macro in quota.h). These macros help keep the | |
162 | * code portable - they are not visible from the syscall interface. | |
163 | */ | |
c8ad20ff NS |
164 | #define Q_XSETGQLIM XQM_CMD(8) /* set groups disk limits */ |
165 | #define Q_XGETGQUOTA XQM_CMD(9) /* get groups disk limits */ | |
166 | #define Q_XSETPQLIM XQM_CMD(10) /* set projects disk limits */ | |
167 | #define Q_XGETPQUOTA XQM_CMD(11) /* get projects disk limits */ | |
1da177e4 | 168 | |
6b3f6b5b | 169 | #define dfltprid 0 |
1da177e4 LT |
170 | #define MAXPATHLEN 1024 |
171 | ||
172 | #define MIN(a,b) (min(a,b)) | |
173 | #define MAX(a,b) (max(a,b)) | |
174 | #define howmany(x, y) (((x)+((y)-1))/(y)) | |
1da177e4 | 175 | |
cde410a9 NS |
176 | /* |
177 | * Various platform dependent calls that don't fit anywhere else | |
178 | */ | |
380b5dc0 | 179 | #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) |
1da177e4 | 180 | #define xfs_stack_trace() dump_stack() |
1da177e4 | 181 | #define xfs_itruncate_data(ip, off) \ |
ec86dc02 | 182 | (-vmtruncate(vn_to_inode(XFS_ITOV(ip)), (off))) |
1da177e4 LT |
183 | |
184 | ||
185 | /* Move the kernel do_div definition off to one side */ | |
186 | ||
187 | #if defined __i386__ | |
188 | /* For ia32 we need to pull some tricks to get past various versions | |
189 | * of the compiler which do not like us using do_div in the middle | |
190 | * of large functions. | |
191 | */ | |
192 | static inline __u32 xfs_do_div(void *a, __u32 b, int n) | |
193 | { | |
194 | __u32 mod; | |
195 | ||
196 | switch (n) { | |
197 | case 4: | |
198 | mod = *(__u32 *)a % b; | |
199 | *(__u32 *)a = *(__u32 *)a / b; | |
200 | return mod; | |
201 | case 8: | |
202 | { | |
203 | unsigned long __upper, __low, __high, __mod; | |
204 | __u64 c = *(__u64 *)a; | |
205 | __upper = __high = c >> 32; | |
206 | __low = c; | |
207 | if (__high) { | |
208 | __upper = __high % (b); | |
209 | __high = __high / (b); | |
210 | } | |
211 | asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); | |
212 | asm("":"=A" (c):"a" (__low),"d" (__high)); | |
213 | *(__u64 *)a = c; | |
214 | return __mod; | |
215 | } | |
216 | } | |
217 | ||
218 | /* NOTREACHED */ | |
219 | return 0; | |
220 | } | |
221 | ||
222 | /* Side effect free 64 bit mod operation */ | |
223 | static inline __u32 xfs_do_mod(void *a, __u32 b, int n) | |
224 | { | |
225 | switch (n) { | |
226 | case 4: | |
227 | return *(__u32 *)a % b; | |
228 | case 8: | |
229 | { | |
230 | unsigned long __upper, __low, __high, __mod; | |
231 | __u64 c = *(__u64 *)a; | |
232 | __upper = __high = c >> 32; | |
233 | __low = c; | |
234 | if (__high) { | |
235 | __upper = __high % (b); | |
236 | __high = __high / (b); | |
237 | } | |
238 | asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); | |
239 | asm("":"=A" (c):"a" (__low),"d" (__high)); | |
240 | return __mod; | |
241 | } | |
242 | } | |
243 | ||
244 | /* NOTREACHED */ | |
245 | return 0; | |
246 | } | |
247 | #else | |
248 | static inline __u32 xfs_do_div(void *a, __u32 b, int n) | |
249 | { | |
250 | __u32 mod; | |
251 | ||
252 | switch (n) { | |
253 | case 4: | |
254 | mod = *(__u32 *)a % b; | |
255 | *(__u32 *)a = *(__u32 *)a / b; | |
256 | return mod; | |
257 | case 8: | |
258 | mod = do_div(*(__u64 *)a, b); | |
259 | return mod; | |
260 | } | |
261 | ||
262 | /* NOTREACHED */ | |
263 | return 0; | |
264 | } | |
265 | ||
266 | /* Side effect free 64 bit mod operation */ | |
267 | static inline __u32 xfs_do_mod(void *a, __u32 b, int n) | |
268 | { | |
269 | switch (n) { | |
270 | case 4: | |
271 | return *(__u32 *)a % b; | |
272 | case 8: | |
273 | { | |
274 | __u64 c = *(__u64 *)a; | |
275 | return do_div(c, b); | |
276 | } | |
277 | } | |
278 | ||
279 | /* NOTREACHED */ | |
280 | return 0; | |
281 | } | |
282 | #endif | |
283 | ||
284 | #undef do_div | |
285 | #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) | |
286 | #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) | |
287 | ||
288 | static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) | |
289 | { | |
290 | x += y - 1; | |
291 | do_div(x, y); | |
292 | return(x * y); | |
293 | } | |
294 | ||
68c32715 NS |
295 | static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) |
296 | { | |
297 | x += y - 1; | |
298 | do_div(x, y); | |
299 | return x; | |
300 | } | |
301 | ||
1da177e4 | 302 | #endif /* __XFS_LINUX__ */ |