1 /*
2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32 #ifndef __XFS_FREEBSD__
33 #define __XFS_FREEBSD__
34
35 #include <xfs_config.h>
36 #include <xfs_compat.h>
37
38 /*
39 * Some types are conditional depending on the target system.
40 * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
41 * XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well
42 * as requiring XFS_BIG_BLKNOS to be set.
43 */
44 #define XFS_BIG_BLKNOS 1
45 #define XFS_BIG_INUMS 0
46
47 #include <xfs_types.h>
48 #include <xfs_arch.h>
49
50 #include <support/atomic.h>
51 #include <support/kmem.h>
52 #include <support/mrlock.h>
53 #include <support/spin.h>
54 #include <support/sv.h>
55 #include <support/ktrace.h>
56 #include <support/mutex.h>
57 #include <support/rwsem.h>
58 #include <support/rwlock.h>
59 #include <support/sema.h>
60 #include <support/debug.h>
61 #include <support/move.h>
62 #include <support/uuid.h>
63 #include <support/time.h>
64
65 #include <xfs_behavior.h>
66 #include <xfs_cred.h>
67 #include <xfs_vfs.h>
68 #include <xfs_vnode.h>
69 #include <xfs_stats.h>
70 #include <xfs_sysctl.h>
71 #include <xfs_iops.h>
72 #include <xfs_super.h>
73 #include <xfs_fs_subr.h>
74 #include <xfs_buf.h>
75 #include <xfs_frw.h>
76
77 /*
78 * Feature macros (disable/enable)
79 */
80 #undef HAVE_REFCACHE /* Do not use refcache. */
81 #undef HAVE_SENDFILE /* sendfile(2) is available in FreeBSD. */
82
83 #ifndef EVMS_MAJOR
84 #define EVMS_MAJOR 117
85 #endif
86
87 #define restricted_chown xfs_params.restrict_chown.val
88 #define irix_sgid_inherit xfs_params.sgid_inherit.val
89 #define irix_symlink_mode xfs_params.symlink_mode.val
90 #define xfs_panic_mask xfs_params.panic_mask.val
91 #define xfs_error_level xfs_params.error_level.val
92 #define xfs_syncd_centisecs xfs_params.syncd_timer.val
93 #define xfs_probe_dmapi xfs_params.probe_dmapi.val
94 #define xfs_probe_ioops xfs_params.probe_ioops.val
95 #define xfs_probe_quota xfs_params.probe_quota.val
96 #define xfs_stats_clear xfs_params.stats_clear.val
97 #define xfs_inherit_sync xfs_params.inherit_sync.val
98 #define xfs_inherit_nodump xfs_params.inherit_nodump.val
99 #define xfs_inherit_noatime xfs_params.inherit_noatim.val
100 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
101 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
102 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
103 #define xfs_rotorstep xfs_params.rotorstep.val
104
105 #define current_cpu() smp_processor_id()
106 #define current_pid() (curthread->td_proc->p_pid)
107
108 #define NBPP PAGE_SIZE
109 #define DPPSHFT (PAGE_SHIFT - 9)
110 #define NDPP (1 << (PAGE_SHIFT - 9))
111 #define dtop(DD) (((DD) + NDPP - 1) >> DPPSHFT)
112 #define dtopt(DD) ((DD) >> DPPSHFT)
113 #define dpoff(DD) ((DD) & (NDPP-1))
114
115 #define NBBY 8 /* number of bits per byte */
116 #define NBPC PAGE_SIZE /* Number of bytes per click */
117 #define BPCSHIFT PAGE_SHIFT /* LOG2(NBPC) if exact */
118
119 /* number of BB's per block device block */
120 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
121
122 /* bytes to clicks */
123 #define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT)
124 #define btoc64(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
125 #define btoct64(x) ((__uint64_t)(x)>>BPCSHIFT)
126 #define io_btoc(x) (((__psunsigned_t)(x)+(IO_NBPC-1))>>IO_BPCSHIFT)
127 #define io_btoct(x) ((__psunsigned_t)(x)>>IO_BPCSHIFT)
128
129 /* off_t bytes to clicks */
130 #define offtoc(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
131 #define offtoct(x) ((xfs_off_t)(x)>>BPCSHIFT)
132
133 /* clicks to off_t bytes */
134 #define ctooff(x) ((xfs_off_t)(x)<<BPCSHIFT)
135
136 /* clicks to bytes */
137 #define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT)
138 #define ctob64(x) ((__uint64_t)(x)<<BPCSHIFT)
139 #define io_ctob(x) ((__psunsigned_t)(x)<<IO_BPCSHIFT)
140
141 #ifndef CELL_CAPABLE
142 #define FSC_NOTIFY_NAME_CHANGED(vp)
143 #endif
144
145 #ifndef ENOATTR
146 #define ENOATTR ENODATA /* Attribute not found */
147 #endif
148
149 /* Note: EWRONGFS never visible outside the kernel */
150 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */
151
152 /*
153 * XXX EFSCORRUPTED needs a real value in errno.h. asm-i386/errno.h won't
154 * return codes out of its known range in errno.
155 * XXX Also note: needs to be < 1000 and fairly unique on Linux (mustn't
156 * conflict with any code we use already or any code a driver may use)
157 * XXX Some options (currently we do #2):
158 * 1/ New error code ["Filesystem is corrupted", _after_ glibc updated]
159 * 2/ 990 ["Unknown error 990"]
160 * 3/ EUCLEAN ["Structure needs cleaning"]
161 * 4/ Convert EFSCORRUPTED to EIO [just prior to return into userspace]
162 */
163 #define EFSCORRUPTED 990 /* Filesystem is corrupted */
164
165 #define SYNCHRONIZE() __compiler_membar()
166 #define __return_address __builtin_return_address(0)
167
168 /*
169 * IRIX (BSD) quotactl makes use of separate commands for user/group,
170 * whereas on Linux the syscall encodes this information into the cmd
171 * field (see the QCMD macro in quota.h). These macros help keep the
172 * code portable - they are not visible from the syscall interface.
173 */
174 #define Q_XSETGQLIM XQM_CMD(0x8) /* set groups disk limits */
175 #define Q_XGETGQUOTA XQM_CMD(0x9) /* get groups disk limits */
176
177 /* IRIX uses a dynamic sizing algorithm (ndquot = 200 + numprocs*2) */
178 /* we may well need to fine-tune this if it ever becomes an issue. */
179 #define DQUOT_MAX_HEURISTIC 1024 /* NR_DQUOTS */
180 #define ndquot DQUOT_MAX_HEURISTIC
181
182 /* IRIX uses the current size of the name cache to guess a good value */
183 /* - this isn't the same but is a good enough starting point for now. */
184 #define DQUOT_HASH_HEURISTIC files_stat.nr_files
185
186 /* IRIX inodes maintain the project ID also, zero this field on Linux */
187 #define DEFAULT_PROJID 0
188 #define dfltprid DEFAULT_PROJID
189
190 #define FINVIS 0x0102 /* don't update timestamps - XFS */
191
192 #define howmany(x, y) (((x)+((y)-1))/(y))
193 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
194
195 #define xfs_sort(a,n,s,fn) qsort(a,n,s,fn)
196
197
xfs_itruncate_data(void * ip,xfs_off_t off)198 static inline int xfs_itruncate_data(void *ip, xfs_off_t off) {
199 printf ("xfs_itruncate_data NI\n");
200 return 0;
201 }
202
203 /*
204 * Juggle IRIX device numbers - still used in ondisk structures
205 */
206 #define XFS_DEV_BITSMAJOR 14
207 #define XFS_DEV_BITSMINOR 18
208 #define XFS_DEV_MAXMAJ 0x1ff
209 #define XFS_DEV_MAXMIN 0x3ffff
210 #define XFS_DEV_MAJOR(dev) ((int)(((unsigned)(dev)>>XFS_DEV_BITSMINOR) \
211 & XFS_DEV_MAXMAJ))
212 #define XFS_DEV_MINOR(dev) ((int)((dev)&XFS_DEV_MAXMIN))
213 #define XFS_MKDEV(major,minor) ((xfs_dev_t)(((major)<<XFS_DEV_BITSMINOR) \
214 | (minor&XFS_DEV_MAXMIN)))
215
216 #define XFS_DEV_TO_KDEVT(dev) mk_kdev(XFS_DEV_MAJOR(dev),XFS_DEV_MINOR(dev))
217
218
219 /* Produce a kernel stack trace */
220
xfs_stack_trace(void)221 static inline void xfs_stack_trace(void)
222 {
223 kdb_backtrace();
224 }
225
226 #define xfs_statvfs_fsid(statp, mp) \
227 ({ \
228 (statp)->f_fsid.val[0] = /*dev2udev(mp->m_dev) */ 1; \
229 (statp)->f_fsid.val[1] = 0; \
230 })
231
232
233 /* Move the kernel do_div definition off to one side */
234
235 #if defined __i386__
236 /* For ia32 we need to pull some tricks to get past various versions
237 * of the compiler which do not like us using do_div in the middle
238 * of large functions.
239 */
xfs_do_div(void * a,__u32 b,int n)240 static inline __u32 xfs_do_div(void *a, __u32 b, int n)
241 {
242 __u32 mod;
243
244 switch (n) {
245 case 4:
246 mod = *(__u32 *)a % b;
247 *(__u32 *)a = *(__u32 *)a / b;
248 return mod;
249 case 8:
250 {
251 unsigned long __upper, __low, __high, __mod;
252 __u64 c = *(__u64 *)a;
253 __upper = __high = c >> 32;
254 __low = c;
255 if (__high) {
256 __upper = __high % (b);
257 __high = __high / (b);
258 }
259 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
260 asm("":"=A" (c):"a" (__low),"d" (__high));
261 *(__u64 *)a = c;
262 return __mod;
263 }
264 }
265
266 /* NOTREACHED */
267 return 0;
268 }
269
270 /* Side effect free 64 bit mod operation */
xfs_do_mod(void * a,__u32 b,int n)271 static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
272 {
273 switch (n) {
274 case 4:
275 return *(__u32 *)a % b;
276 case 8:
277 {
278 unsigned long __upper, __low, __high, __mod;
279 __u64 c = *(__u64 *)a;
280 __upper = __high = c >> 32;
281 __low = c;
282 if (__high) {
283 __upper = __high % (b);
284 __high = __high / (b);
285 }
286 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
287 asm("":"=A" (c):"a" (__low),"d" (__high));
288 return __mod;
289 }
290 }
291
292 /* NOTREACHED */
293 return 0;
294 }
295 #else
296
297 #define do_div(n, base) ({\
298 int __res; \
299 __res = ((__u64)(n)) % (__u32)(base); \
300 (n) = ((__u64)(n)) / (__u32)(base); \
301 __res; })
302
xfs_do_div(void * a,__u32 b,int n)303 static inline __u32 xfs_do_div(void *a, __u32 b, int n)
304 {
305 __u32 mod;
306
307 switch (n) {
308 case 4:
309 mod = *(__u32 *)a % b;
310 *(__u32 *)a = *(__u32 *)a / b;
311 return mod;
312 case 8:
313 mod = do_div(*(__u64 *)a, b);
314 return mod;
315 }
316
317 /* NOTREACHED */
318 return 0;
319 }
320
321 /* Side effect free 64 bit mod operation */
xfs_do_mod(void * a,__u32 b,int n)322 static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
323 {
324 switch (n) {
325 case 4:
326 return *(__u32 *)a % b;
327 case 8:
328 {
329 __u64 c = *(__u64 *)a;
330 return do_div(c, b);
331 }
332 }
333
334 /* NOTREACHED */
335 return 0;
336 }
337 #endif
338
339 #undef do_div
340 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
341 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
342
roundup_64(__uint64_t x,__uint32_t y)343 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
344 {
345 x += y - 1;
346 do_div(x, y);
347 return(x * y);
348 }
349
350 #endif /* __XFS_FREEBSD__ */
351