1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18 #ifndef __XFS_LINUX__
19 #define __XFS_LINUX__
20
21 #include <linux/types.h>
22
23 /*
24 * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
25 * XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set.
26 */
27 #if defined(CONFIG_LBDAF) || (BITS_PER_LONG == 64)
28 # define XFS_BIG_BLKNOS 1
29 # define XFS_BIG_INUMS 1
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>
40 #include <time.h>
41
42 #include <support/uuid.h>
43
44 #include <linux/semaphore.h>
45 #include <linux/mm.h>
46 #include <linux/kernel.h>
47 #include <linux/blkdev.h>
48 #include <linux/slab.h>
49 #include <linux/module.h>
50 #include <linux/mutex.h>
51 #include <linux/file.h>
52 #include <linux/swap.h>
53 #include <linux/errno.h>
54 #include <linux/sched.h>
55 #include <linux/bitops.h>
56 #include <linux/major.h>
57 #include <linux/pagemap.h>
58 #include <linux/vfs.h>
59 #include <linux/seq_file.h>
60 #include <linux/init.h>
61 #include <linux/list.h>
62 #include <linux/proc_fs.h>
63 #include <linux/sort.h>
64 #include <linux/cpu.h>
65 #include <linux/notifier.h>
66 #include <linux/delay.h>
67 #include <linux/log2.h>
68 #include <linux/spinlock.h>
69 #include <linux/random.h>
70 #include <linux/ctype.h>
71 #include <linux/writeback.h>
72 #include <linux/capability.h>
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
81 #include <xfs_vnode.h>
82 #include <xfs_stats.h>
83 #include <xfs_sysctl.h>
84 #include <xfs_iops.h>
85 #include <xfs_aops.h>
86 #include <xfs_super.h>
87 #include <xfs_buf.h>
88 #include <xfs_message.h>
89
90 /*
91 * Feature macros (disable/enable)
92 */
93 #ifdef CONFIG_SMP
94 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
95 #else
96 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
97 #endif
98
99 #define irix_sgid_inherit xfs_params.sgid_inherit.val
100 #define irix_symlink_mode xfs_params.symlink_mode.val
101 #define xfs_panic_mask xfs_params.panic_mask.val
102 #define xfs_error_level xfs_params.error_level.val
103 #define xfs_syncd_centisecs xfs_params.syncd_timer.val
104 #define xfs_stats_clear xfs_params.stats_clear.val
105 #define xfs_inherit_sync xfs_params.inherit_sync.val
106 #define xfs_inherit_nodump xfs_params.inherit_nodump.val
107 #define xfs_inherit_noatime xfs_params.inherit_noatim.val
108 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
109 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
110 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
111 #define xfs_rotorstep xfs_params.rotorstep.val
112 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
113 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
114
115 #define current_cpu() (raw_smp_processor_id())
116 #define current_pid() (current->pid)
117 #define current_test_flags(f) (current->flags & (f))
118 #define current_set_flags_nested(sp, f) \
119 (*(sp) = current->flags, current->flags |= (f))
120 #define current_clear_flags_nested(sp, f) \
121 (*(sp) = current->flags, current->flags &= ~(f))
122 #define current_restore_flags_nested(sp, f) \
123 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
124
125 #define spinlock_destroy(lock)
126
127 #define NBBY 8 /* number of bits per byte */
128
129 /*
130 * Size of block device i/o is parameterized here.
131 * Currently the system supports page-sized i/o.
132 */
133 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
134 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
135 /* number of BB's per block device block */
136 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
137
138 #define ENOATTR ENODATA /* Attribute not found */
139 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */
140 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
141
142 #define SYNCHRONIZE() barrier()
143 #define __return_address __builtin_return_address(0)
144
145 #define XFS_PROJID_DEFAULT 0
146 #define MAXPATHLEN 1024
147
148 #define MIN(a,b) (min(a,b))
149 #define MAX(a,b) (max(a,b))
150 #define howmany(x, y) (((x)+((y)-1))/(y))
151
152 /*
153 * Various platform dependent calls that don't fit anywhere else
154 */
155 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
156 #define xfs_stack_trace() dump_stack()
157
158
159 /* Move the kernel do_div definition off to one side */
160
161 #if defined __i386__
162 /* For ia32 we need to pull some tricks to get past various versions
163 * of the compiler which do not like us using do_div in the middle
164 * of large functions.
165 */
xfs_do_div(void * a,__u32 b,int n)166 static inline __u32 xfs_do_div(void *a, __u32 b, int n)
167 {
168 __u32 mod;
169
170 switch (n) {
171 case 4:
172 mod = *(__u32 *)a % b;
173 *(__u32 *)a = *(__u32 *)a / b;
174 return mod;
175 case 8:
176 {
177 unsigned long __upper, __low, __high, __mod;
178 __u64 c = *(__u64 *)a;
179 __upper = __high = c >> 32;
180 __low = c;
181 if (__high) {
182 __upper = __high % (b);
183 __high = __high / (b);
184 }
185 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
186 asm("":"=A" (c):"a" (__low),"d" (__high));
187 *(__u64 *)a = c;
188 return __mod;
189 }
190 }
191
192 /* NOTREACHED */
193 return 0;
194 }
195
196 /* Side effect free 64 bit mod operation */
xfs_do_mod(void * a,__u32 b,int n)197 static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
198 {
199 switch (n) {
200 case 4:
201 return *(__u32 *)a % b;
202 case 8:
203 {
204 unsigned long __upper, __low, __high, __mod;
205 __u64 c = *(__u64 *)a;
206 __upper = __high = c >> 32;
207 __low = c;
208 if (__high) {
209 __upper = __high % (b);
210 __high = __high / (b);
211 }
212 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
213 asm("":"=A" (c):"a" (__low),"d" (__high));
214 return __mod;
215 }
216 }
217
218 /* NOTREACHED */
219 return 0;
220 }
221 #else
xfs_do_div(void * a,__u32 b,int n)222 static inline __u32 xfs_do_div(void *a, __u32 b, int n)
223 {
224 __u32 mod;
225
226 switch (n) {
227 case 4:
228 mod = *(__u32 *)a % b;
229 *(__u32 *)a = *(__u32 *)a / b;
230 return mod;
231 case 8:
232 mod = do_div(*(__u64 *)a, b);
233 return mod;
234 }
235
236 /* NOTREACHED */
237 return 0;
238 }
239
240 /* Side effect free 64 bit mod operation */
xfs_do_mod(void * a,__u32 b,int n)241 static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
242 {
243 switch (n) {
244 case 4:
245 return *(__u32 *)a % b;
246 case 8:
247 {
248 __u64 c = *(__u64 *)a;
249 return do_div(c, b);
250 }
251 }
252
253 /* NOTREACHED */
254 return 0;
255 }
256 #endif
257
258 #undef do_div
259 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
260 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
261
roundup_64(__uint64_t x,__uint32_t y)262 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
263 {
264 x += y - 1;
265 do_div(x, y);
266 return(x * y);
267 }
268
howmany_64(__uint64_t x,__uint32_t y)269 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
270 {
271 x += y - 1;
272 do_div(x, y);
273 return x;
274 }
275
276 /* ARM old ABI has some weird alignment/padding */
277 #if defined(__arm__) && !defined(__ARM_EABI__)
278 #define __arch_pack __attribute__((packed))
279 #else
280 #define __arch_pack
281 #endif
282
283 #define ASSERT_ALWAYS(expr) \
284 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
285
286 #ifndef DEBUG
287 #define ASSERT(expr) ((void)0)
288
289 #ifndef STATIC
290 # define STATIC static noinline
291 #endif
292
293 #else /* DEBUG */
294
295 #define ASSERT(expr) \
296 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
297
298 #ifndef STATIC
299 # define STATIC noinline
300 #endif
301
302 #endif /* DEBUG */
303
304 #endif /* __XFS_LINUX__ */
305