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
37 #include "kmem.h"
38 #include "mrlock.h"
39 #include "time.h"
40 #include "uuid.h"
41
42 #include <linux/semaphore.h>
43 #include <linux/mm.h>
44 #include <linux/kernel.h>
45 #include <linux/blkdev.h>
46 #include <linux/slab.h>
47 #include <linux/module.h>
48 #include <linux/mutex.h>
49 #include <linux/file.h>
50 #include <linux/swap.h>
51 #include <linux/errno.h>
52 #include <linux/sched.h>
53 #include <linux/bitops.h>
54 #include <linux/major.h>
55 #include <linux/pagemap.h>
56 #include <linux/vfs.h>
57 #include <linux/seq_file.h>
58 #include <linux/init.h>
59 #include <linux/list.h>
60 #include <linux/proc_fs.h>
61 #include <linux/sort.h>
62 #include <linux/cpu.h>
63 #include <linux/notifier.h>
64 #include <linux/delay.h>
65 #include <linux/log2.h>
66 #include <linux/spinlock.h>
67 #include <linux/random.h>
68 #include <linux/ctype.h>
69 #include <linux/writeback.h>
70 #include <linux/capability.h>
71 #include <linux/kthread.h>
72 #include <linux/freezer.h>
73 #include <linux/list_sort.h>
74
75 #include <asm/page.h>
76 #include <asm/div64.h>
77 #include <asm/param.h>
78 #include <asm/uaccess.h>
79 #include <asm/byteorder.h>
80 #include <asm/unaligned.h>
81
82 #include "xfs_vnode.h"
83 #include "xfs_stats.h"
84 #include "xfs_sysctl.h"
85 #include "xfs_iops.h"
86 #include "xfs_aops.h"
87 #include "xfs_super.h"
88 #include "xfs_buf.h"
89 #include "xfs_message.h"
90
91 #ifdef __BIG_ENDIAN
92 #define XFS_NATIVE_HOST 1
93 #else
94 #undef XFS_NATIVE_HOST
95 #endif
96
97 /*
98 * Feature macros (disable/enable)
99 */
100 #ifdef CONFIG_SMP
101 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
102 #else
103 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
104 #endif
105
106 #define irix_sgid_inherit xfs_params.sgid_inherit.val
107 #define irix_symlink_mode xfs_params.symlink_mode.val
108 #define xfs_panic_mask xfs_params.panic_mask.val
109 #define xfs_error_level xfs_params.error_level.val
110 #define xfs_syncd_centisecs xfs_params.syncd_timer.val
111 #define xfs_stats_clear xfs_params.stats_clear.val
112 #define xfs_inherit_sync xfs_params.inherit_sync.val
113 #define xfs_inherit_nodump xfs_params.inherit_nodump.val
114 #define xfs_inherit_noatime xfs_params.inherit_noatim.val
115 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
116 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
117 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
118 #define xfs_rotorstep xfs_params.rotorstep.val
119 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
120 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
121
122 #define current_cpu() (raw_smp_processor_id())
123 #define current_pid() (current->pid)
124 #define current_test_flags(f) (current->flags & (f))
125 #define current_set_flags_nested(sp, f) \
126 (*(sp) = current->flags, current->flags |= (f))
127 #define current_clear_flags_nested(sp, f) \
128 (*(sp) = current->flags, current->flags &= ~(f))
129 #define current_restore_flags_nested(sp, f) \
130 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
131
132 #define spinlock_destroy(lock)
133
134 #define NBBY 8 /* number of bits per byte */
135
136 /*
137 * Size of block device i/o is parameterized here.
138 * Currently the system supports page-sized i/o.
139 */
140 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
141 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
142 /* number of BB's per block device block */
143 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
144
145 #define ENOATTR ENODATA /* Attribute not found */
146 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */
147 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
148
149 #define SYNCHRONIZE() barrier()
150 #define __return_address __builtin_return_address(0)
151
152 #define XFS_PROJID_DEFAULT 0
153 #define MAXPATHLEN 1024
154
155 #define MIN(a,b) (min(a,b))
156 #define MAX(a,b) (max(a,b))
157 #define howmany(x, y) (((x)+((y)-1))/(y))
158
159 /*
160 * Various platform dependent calls that don't fit anywhere else
161 */
162 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
163 #define xfs_stack_trace() dump_stack()
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 */
xfs_do_div(void * a,__u32 b,int n)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 */
xfs_do_mod(void * a,__u32 b,int n)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
xfs_do_div(void * a,__u32 b,int n)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 */
xfs_do_mod(void * a,__u32 b,int n)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
roundup_64(__uint64_t x,__uint32_t y)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
howmany_64(__uint64_t x,__uint32_t y)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
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
290 #define ASSERT_ALWAYS(expr) \
291 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
292
293 #ifndef DEBUG
294 #define ASSERT(expr) ((void)0)
295
296 #ifndef STATIC
297 # define STATIC static noinline
298 #endif
299
300 #else /* DEBUG */
301
302 #define ASSERT(expr) \
303 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
304
305 #ifndef STATIC
306 # define STATIC noinline
307 #endif
308
309 #endif /* DEBUG */
310
311 #endif /* __XFS_LINUX__ */
312