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Tweak /proc/ipmi removal
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ufs / super.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/fs/ufs/super.c
3 *
4 * Copyright (C) 1998
5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
7 */
8
9/* Derived from
10 *
11 * linux/fs/ext2/super.c
12 *
13 * Copyright (C) 1992, 1993, 1994, 1995
14 * Remy Card (card@masi.ibp.fr)
15 * Laboratoire MASI - Institut Blaise Pascal
16 * Universite Pierre et Marie Curie (Paris VI)
17 *
18 * from
19 *
20 * linux/fs/minix/inode.c
21 *
22 * Copyright (C) 1991, 1992 Linus Torvalds
23 *
24 * Big-endian to little-endian byte-swapping/bitmaps by
25 * David S. Miller (davem@caip.rutgers.edu), 1995
26 */
27
28/*
29 * Inspired by
30 *
31 * linux/fs/ufs/super.c
32 *
33 * Copyright (C) 1996
34 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35 * Laboratory for Computer Science Research Computing Facility
36 * Rutgers, The State University of New Jersey
37 *
38 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
39 *
40 * Kernel module support added on 96/04/26 by
41 * Stefan Reinauer <stepan@home.culture.mipt.ru>
42 *
43 * Module usage counts added on 96/04/29 by
44 * Gertjan van Wingerde <gertjan@cs.vu.nl>
45 *
46 * Clean swab support on 19970406 by
47 * Francois-Rene Rideau <fare@tunes.org>
48 *
49 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
50 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
51 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
52 *
53 * NeXTstep support added on February 5th 1998 by
54 * Niels Kristian Bech Jensen <nkbj@image.dk>.
55 *
56 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
57 *
58 * HP/UX hfs filesystem support added by
59 * Martin K. Petersen <mkp@mkp.net>, August 1999
60 *
61 * UFS2 (of FreeBSD 5.x) support added by
62 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
63 *
cbcae39f
ED		 64 * UFS2 write support added by
65 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
1da177e4
LT		 66 */
67
68
1da177e4
LT		 69#include <linux/module.h>
70#include <linux/bitops.h>
71
72#include <stdarg.h>
73
74#include <asm/uaccess.h>
75#include <asm/system.h>
76
77#include <linux/errno.h>
78#include <linux/fs.h>
79#include <linux/ufs_fs.h>
80#include <linux/slab.h>
81#include <linux/time.h>
82#include <linux/stat.h>
83#include <linux/string.h>
84#include <linux/blkdev.h>
85#include <linux/init.h>
86#include <linux/parser.h>
87#include <linux/smp_lock.h>
88#include <linux/buffer_head.h>
89#include <linux/vfs.h>
9e8c4273 90#include <linux/log2.h>
2a9807c0
ED		 91#include <linux/mount.h>
92#include <linux/seq_file.h>
1da177e4
LT		 93
94#include "swab.h"
95#include "util.h"
96
abf5d15f 97#ifdef CONFIG_UFS_DEBUG
1da177e4
LT		 98/*
99 * Print contents of ufs_super_block, useful for debugging
100 */
3313e292 101static void ufs_print_super_stuff(struct super_block *sb,
647b7e87
ED		 102 struct ufs_super_block_first *usb1,
103 struct ufs_super_block_second *usb2,
104 struct ufs_super_block_third *usb3)
1da177e4 105{
3313e292
ED		 106 u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
107
1da177e4 108 printk("ufs_print_super_stuff\n");
3313e292
ED		 109 printk(" magic: 0x%x\n", magic);
110 if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
647b7e87
ED		 111 printk(" fs_size: %llu\n", (unsigned long long)
112 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
113 printk(" fs_dsize: %llu\n", (unsigned long long)
114 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
115 printk(" bsize: %u\n",
116 fs32_to_cpu(sb, usb1->fs_bsize));
117 printk(" fsize: %u\n",
118 fs32_to_cpu(sb, usb1->fs_fsize));
119 printk(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname);
120 printk(" fs_sblockloc: %llu\n", (unsigned long long)
121 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
122 printk(" cs_ndir(No of dirs): %llu\n", (unsigned long long)
123 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
124 printk(" cs_nbfree(No of free blocks): %llu\n",
125 (unsigned long long)
126 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
3313e292
ED		 127 printk(KERN_INFO" cs_nifree(Num of free inodes): %llu\n",
128 (unsigned long long)
129 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
130 printk(KERN_INFO" cs_nffree(Num of free frags): %llu\n",
131 (unsigned long long)
132 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
647b7e87
ED		 133 } else {
134 printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
135 printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
136 printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
137 printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
138 printk(" cgoffset: %u\n",
139 fs32_to_cpu(sb, usb1->fs_cgoffset));
140 printk(" ~cgmask: 0x%x\n",
141 ~fs32_to_cpu(sb, usb1->fs_cgmask));
142 printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size));
143 printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
144 printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
145 printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
146 printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
147 printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag));
148 printk(" fragshift: %u\n",
149 fs32_to_cpu(sb, usb1->fs_fragshift));
150 printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
151 printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
152 printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
153 printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc));
154 printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
155 printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
156 printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
157 printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
158 printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
159 printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
160 printk(" fstodb: %u\n",
161 fs32_to_cpu(sb, usb1->fs_fsbtodb));
162 printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
163 printk(" ndir %u\n",
164 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
165 printk(" nifree %u\n",
166 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
167 printk(" nbfree %u\n",
168 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
169 printk(" nffree %u\n",
170 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
171 }
1da177e4
LT		 172 printk("\n");
173}
174
175/*
176 * Print contents of ufs_cylinder_group, useful for debugging
177 */
647b7e87
ED		 178static void ufs_print_cylinder_stuff(struct super_block *sb,
179 struct ufs_cylinder_group *cg)
1da177e4
LT		 180{
181 printk("\nufs_print_cylinder_stuff\n");
96710b29 182 printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
1da177e4
LT		 183 printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic));
184 printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time));
185 printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx));
186 printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
187 printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk));
188 printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
189 printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
190 printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
191 printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
192 printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
193 printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor));
194 printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor));
195 printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor));
196 printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n",
197 fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
198 fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
199 fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
200 fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
201 printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
202 printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff));
203 printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
204 printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
205 printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
647b7e87
ED		 206 printk(" clustersumoff %u\n",
207 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
208 printk(" clusteroff %u\n",
209 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
210 printk(" nclusterblks %u\n",
211 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
1da177e4
LT		 212 printk("\n");
213}
647b7e87 214#else
3313e292 215# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
647b7e87 216# define ufs_print_cylinder_stuff(sb, cg) /**/
abf5d15f 217#endif /* CONFIG_UFS_DEBUG */
1da177e4 218
ee9b6d61 219static const struct super_operations ufs_super_ops;
1da177e4
LT		 220
221static char error_buf[1024];
222
223void ufs_error (struct super_block * sb, const char * function,
224 const char * fmt, ...)
225{
226 struct ufs_sb_private_info * uspi;
227 struct ufs_super_block_first * usb1;
228 va_list args;
229
230 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 231 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 232
233 if (!(sb->s_flags & MS_RDONLY)) {
234 usb1->fs_clean = UFS_FSBAD;
9695ef16 235 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 236 sb->s_dirt = 1;
237 sb->s_flags |= MS_RDONLY;
238 }
239 va_start (args, fmt);
4a6e617a 240 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 241 va_end (args);
242 switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
243 case UFS_MOUNT_ONERROR_PANIC:
244 panic ("UFS-fs panic (device %s): %s: %s\n",
245 sb->s_id, function, error_buf);
246
247 case UFS_MOUNT_ONERROR_LOCK:
248 case UFS_MOUNT_ONERROR_UMOUNT:
249 case UFS_MOUNT_ONERROR_REPAIR:
250 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
251 sb->s_id, function, error_buf);
252 }
253}
254
255void ufs_panic (struct super_block * sb, const char * function,
256 const char * fmt, ...)
257{
258 struct ufs_sb_private_info * uspi;
259 struct ufs_super_block_first * usb1;
260 va_list args;
261
262 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e 263 usb1 = ubh_get_usb_first(uspi);
1da177e4
LT		 264
265 if (!(sb->s_flags & MS_RDONLY)) {
266 usb1->fs_clean = UFS_FSBAD;
9695ef16 267 ubh_mark_buffer_dirty(USPI_UBH(uspi));
1da177e4
LT		 268 sb->s_dirt = 1;
269 }
270 va_start (args, fmt);
4a6e617a 271 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 272 va_end (args);
273 sb->s_flags |= MS_RDONLY;
274 printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
275 sb->s_id, function, error_buf);
276}
277
278void ufs_warning (struct super_block * sb, const char * function,
279 const char * fmt, ...)
280{
281 va_list args;
282
283 va_start (args, fmt);
4a6e617a 284 vsnprintf (error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 285 va_end (args);
286 printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
287 sb->s_id, function, error_buf);
288}
289
290enum {
2a9807c0
ED		 291 Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
292 Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
293 Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
294 Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
295 Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
296 Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
297 Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
298 Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
299 Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
300 Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
301 Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
302 Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
303 Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
304 Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
305 Opt_err
1da177e4
LT		 306};
307
308static match_table_t tokens = {
309 {Opt_type_old, "ufstype=old"},
310 {Opt_type_sunx86, "ufstype=sunx86"},
311 {Opt_type_sun, "ufstype=sun"},
252e211e 312 {Opt_type_sunos, "ufstype=sunos"},
1da177e4
LT		 313 {Opt_type_44bsd, "ufstype=44bsd"},
314 {Opt_type_ufs2, "ufstype=ufs2"},
315 {Opt_type_ufs2, "ufstype=5xbsd"},
316 {Opt_type_hp, "ufstype=hp"},
317 {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
318 {Opt_type_nextstep, "ufstype=nextstep"},
319 {Opt_type_openstep, "ufstype=openstep"},
2a9807c0 320/*end of possible ufs types */
1da177e4
LT		 321 {Opt_onerror_panic, "onerror=panic"},
322 {Opt_onerror_lock, "onerror=lock"},
323 {Opt_onerror_umount, "onerror=umount"},
324 {Opt_onerror_repair, "onerror=repair"},
325 {Opt_err, NULL}
326};
327
328static int ufs_parse_options (char * options, unsigned * mount_options)
329{
330 char * p;
331
abf5d15f 332 UFSD("ENTER\n");
1da177e4
LT		 333
334 if (!options)
335 return 1;
336
337 while ((p = strsep(&options, ",")) != NULL) {
338 substring_t args[MAX_OPT_ARGS];
339 int token;
340 if (!*p)
341 continue;
342
343 token = match_token(p, tokens, args);
344 switch (token) {
345 case Opt_type_old:
346 ufs_clear_opt (*mount_options, UFSTYPE);
347 ufs_set_opt (*mount_options, UFSTYPE_OLD);
348 break;
349 case Opt_type_sunx86:
350 ufs_clear_opt (*mount_options, UFSTYPE);
351 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
352 break;
353 case Opt_type_sun:
354 ufs_clear_opt (*mount_options, UFSTYPE);
355 ufs_set_opt (*mount_options, UFSTYPE_SUN);
356 break;
252e211e
MF		 357 case Opt_type_sunos:
358 ufs_clear_opt(*mount_options, UFSTYPE);
359 ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
360 break;
1da177e4
LT		 361 case Opt_type_44bsd:
362 ufs_clear_opt (*mount_options, UFSTYPE);
363 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
364 break;
365 case Opt_type_ufs2:
366 ufs_clear_opt(*mount_options, UFSTYPE);
367 ufs_set_opt(*mount_options, UFSTYPE_UFS2);
368 break;
369 case Opt_type_hp:
370 ufs_clear_opt (*mount_options, UFSTYPE);
371 ufs_set_opt (*mount_options, UFSTYPE_HP);
372 break;
373 case Opt_type_nextstepcd:
374 ufs_clear_opt (*mount_options, UFSTYPE);
375 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
376 break;
377 case Opt_type_nextstep:
378 ufs_clear_opt (*mount_options, UFSTYPE);
379 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
380 break;
381 case Opt_type_openstep:
382 ufs_clear_opt (*mount_options, UFSTYPE);
383 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
384 break;
385 case Opt_onerror_panic:
386 ufs_clear_opt (*mount_options, ONERROR);
387 ufs_set_opt (*mount_options, ONERROR_PANIC);
388 break;
389 case Opt_onerror_lock:
390 ufs_clear_opt (*mount_options, ONERROR);
391 ufs_set_opt (*mount_options, ONERROR_LOCK);
392 break;
393 case Opt_onerror_umount:
394 ufs_clear_opt (*mount_options, ONERROR);
395 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
396 break;
397 case Opt_onerror_repair:
398 printk("UFS-fs: Unable to do repair on error, "
399 "will lock lock instead\n");
400 ufs_clear_opt (*mount_options, ONERROR);
401 ufs_set_opt (*mount_options, ONERROR_REPAIR);
402 break;
403 default:
404 printk("UFS-fs: Invalid option: \"%s\" "
405 "or missing value\n", p);
406 return 0;
407 }
408 }
409 return 1;
410}
411
412/*
ee3ffd6c
ED		 413 * Diffrent types of UFS hold fs_cstotal in different
414 * places, and use diffrent data structure for it.
415 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
1da177e4 416 */
ee3ffd6c 417static void ufs_setup_cstotal(struct super_block *sb)
e295cfcb 418{
647b7e87
ED		 419 struct ufs_sb_info *sbi = UFS_SB(sb);
420 struct ufs_sb_private_info *uspi = sbi->s_uspi;
ee3ffd6c
ED		 421 struct ufs_super_block_first *usb1;
422 struct ufs_super_block_second *usb2;
647b7e87 423 struct ufs_super_block_third *usb3;
ee3ffd6c
ED		 424 unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
425
426 UFSD("ENTER, mtype=%u\n", mtype);
427 usb1 = ubh_get_usb_first(uspi);
428 usb2 = ubh_get_usb_second(uspi);
429 usb3 = ubh_get_usb_third(uspi);
430
431 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
432 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
433 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
434 /*we have statistic in different place, then usual*/
435 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
436 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
437 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
438 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
439 } else {
440 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
441 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
442 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
443 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
444 }
445 UFSD("EXIT\n");
446}
447
448/*
449 * Read on-disk structures associated with cylinder groups
450 */
451static int ufs_read_cylinder_structures(struct super_block *sb)
452{
453 struct ufs_sb_info *sbi = UFS_SB(sb);
454 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 455 struct ufs_buffer_head * ubh;
456 unsigned char * base, * space;
457 unsigned size, blks, i;
ee3ffd6c
ED		 458 struct ufs_super_block_third *usb3;
459
abf5d15f 460 UFSD("ENTER\n");
1da177e4 461
ee3ffd6c 462 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 463 /*
464 * Read cs structures from (usually) first data block
465 * on the device.
466 */
467 size = uspi->s_cssize;
468 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
469 base = space = kmalloc(size, GFP_KERNEL);
470 if (!base)
471 goto failed;
e295cfcb 472 sbi->s_csp = (struct ufs_csum *)space;
1da177e4
LT		 473 for (i = 0; i < blks; i += uspi->s_fpb) {
474 size = uspi->s_bsize;
475 if (i + uspi->s_fpb > blks)
476 size = (blks - i) * uspi->s_fsize;
477
3313e292 478 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
7b4ee73e
E		 479
480 if (!ubh)
481 goto failed;
482
483 ubh_ubhcpymem (space, ubh, size);
7b4ee73e 484
1da177e4
LT		 485 space += size;
486 ubh_brelse (ubh);
487 ubh = NULL;
488 }
489
490 /*
491 * Read cylinder group (we read only first fragment from block
492 * at this time) and prepare internal data structures for cg caching.
493 */
494 if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
495 goto failed;
496 for (i = 0; i < uspi->s_ncg; i++)
497 sbi->s_ucg[i] = NULL;
498 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
499 sbi->s_ucpi[i] = NULL;
500 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
501 }
502 for (i = 0; i < uspi->s_ncg; i++) {
abf5d15f 503 UFSD("read cg %u\n", i);
1da177e4
LT		 504 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
505 goto failed;
506 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
507 goto failed;
647b7e87 508
1da177e4 509 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
1da177e4
LT		 510 }
511 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
512 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
513 goto failed;
514 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
515 }
516 sbi->s_cg_loaded = 0;
abf5d15f 517 UFSD("EXIT\n");
1da177e4
LT		 518 return 1;
519
520failed:
f99d49ad 521 kfree (base);
1da177e4
LT		 522 if (sbi->s_ucg) {
523 for (i = 0; i < uspi->s_ncg; i++)
f99d49ad
JJ		 524 if (sbi->s_ucg[i])
525 brelse (sbi->s_ucg[i]);
1da177e4
LT		 526 kfree (sbi->s_ucg);
527 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
f99d49ad 528 kfree (sbi->s_ucpi[i]);
1da177e4 529 }
abf5d15f 530 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 531 return 0;
532}
533
534/*
ee3ffd6c 535 * Sync our internal copy of fs_cstotal with disk
1da177e4 536 */
ee3ffd6c 537static void ufs_put_cstotal(struct super_block *sb)
e295cfcb 538{
ee3ffd6c
ED		 539 unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
540 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
541 struct ufs_super_block_first *usb1;
542 struct ufs_super_block_second *usb2;
543 struct ufs_super_block_third *usb3;
544
545 UFSD("ENTER\n");
546 usb1 = ubh_get_usb_first(uspi);
547 usb2 = ubh_get_usb_second(uspi);
548 usb3 = ubh_get_usb_third(uspi);
549
550 if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
551 (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
552 mtype == UFS_MOUNT_UFSTYPE_UFS2) {
553 /*we have statistic in different place, then usual*/
554 usb2->fs_un.fs_u2.cs_ndir =
555 cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
556 usb2->fs_un.fs_u2.cs_nbfree =
557 cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
558 usb3->fs_un1.fs_u2.cs_nifree =
559 cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
560 usb3->fs_un1.fs_u2.cs_nffree =
561 cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
562 } else {
563 usb1->fs_cstotal.cs_ndir =
564 cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
565 usb1->fs_cstotal.cs_nbfree =
566 cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
567 usb1->fs_cstotal.cs_nifree =
568 cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
569 usb1->fs_cstotal.cs_nffree =
570 cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
571 }
572 ubh_mark_buffer_dirty(USPI_UBH(uspi));
3313e292 573 ufs_print_super_stuff(sb, usb1, usb2, usb3);
ee3ffd6c
ED		 574 UFSD("EXIT\n");
575}
576
577/**
578 * ufs_put_super_internal() - put on-disk intrenal structures
579 * @sb: pointer to super_block structure
580 * Put on-disk structures associated with cylinder groups
581 * and write them back to disk, also update cs_total on disk
582 */
583static void ufs_put_super_internal(struct super_block *sb)
584{
585 struct ufs_sb_info *sbi = UFS_SB(sb);
586 struct ufs_sb_private_info *uspi = sbi->s_uspi;
1da177e4
LT		 587 struct ufs_buffer_head * ubh;
588 unsigned char * base, * space;
589 unsigned blks, size, i;
ee3ffd6c 590
1da177e4 591
abf5d15f 592 UFSD("ENTER\n");
ee3ffd6c 593 ufs_put_cstotal(sb);
1da177e4
LT		 594 size = uspi->s_cssize;
595 blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
e295cfcb 596 base = space = (char*) sbi->s_csp;
1da177e4
LT		 597 for (i = 0; i < blks; i += uspi->s_fpb) {
598 size = uspi->s_bsize;
599 if (i + uspi->s_fpb > blks)
600 size = (blks - i) * uspi->s_fsize;
3313e292 601
1da177e4 602 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
3313e292 603
1da177e4
LT		 604 ubh_memcpyubh (ubh, space, size);
605 space += size;
606 ubh_mark_buffer_uptodate (ubh, 1);
607 ubh_mark_buffer_dirty (ubh);
608 ubh_brelse (ubh);
609 }
610 for (i = 0; i < sbi->s_cg_loaded; i++) {
611 ufs_put_cylinder (sb, i);
612 kfree (sbi->s_ucpi[i]);
613 }
614 for (; i < UFS_MAX_GROUP_LOADED; i++)
615 kfree (sbi->s_ucpi[i]);
616 for (i = 0; i < uspi->s_ncg; i++)
617 brelse (sbi->s_ucg[i]);
618 kfree (sbi->s_ucg);
619 kfree (base);
abf5d15f 620 UFSD("EXIT\n");
1da177e4
LT		 621}
622
623static int ufs_fill_super(struct super_block *sb, void *data, int silent)
624{
625 struct ufs_sb_info * sbi;
626 struct ufs_sb_private_info * uspi;
627 struct ufs_super_block_first * usb1;
628 struct ufs_super_block_second * usb2;
629 struct ufs_super_block_third * usb3;
1da177e4
LT		 630 struct ufs_buffer_head * ubh;
631 struct inode *inode;
632 unsigned block_size, super_block_size;
633 unsigned flags;
7b4ee73e 634 unsigned super_block_offset;
1da177e4
LT		 635
636 uspi = NULL;
637 ubh = NULL;
638 flags = 0;
639
abf5d15f 640 UFSD("ENTER\n");
1da177e4 641
f8314dc6 642 sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
1da177e4
LT		 643 if (!sbi)
644 goto failed_nomem;
645 sb->s_fs_info = sbi;
1da177e4 646
abf5d15f 647 UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
1da177e4
LT		 648
649#ifndef CONFIG_UFS_FS_WRITE
650 if (!(sb->s_flags & MS_RDONLY)) {
651 printk("ufs was compiled with read-only support, "
652 "can't be mounted as read-write\n");
653 goto failed;
654 }
655#endif
656 /*
657 * Set default mount options
658 * Parse mount options
659 */
660 sbi->s_mount_opt = 0;
661 ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
662 if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
663 printk("wrong mount options\n");
664 goto failed;
665 }
666 if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
667 if (!silent)
668 printk("You didn't specify the type of your ufs filesystem\n\n"
669 "mount -t ufs -o ufstype="
c690a722 670 "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
1da177e4
LT		 671 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
672 "default is ufstype=old\n");
673 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
674 }
675
252e211e
MF		 676 uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
677 sbi->s_uspi = uspi;
1da177e4
LT		 678 if (!uspi)
679 goto failed;
f336953b 680 uspi->s_dirblksize = UFS_SECTOR_SIZE;
7b4ee73e
E		 681 super_block_offset=UFS_SBLOCK;
682
1da177e4
LT		 683 /* Keep 2Gig file limit. Some UFS variants need to override
684 this but as I don't know which I'll let those in the know loosen
685 the rules */
1da177e4
LT		 686 switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
687 case UFS_MOUNT_UFSTYPE_44BSD:
abf5d15f 688 UFSD("ufstype=44bsd\n");
1da177e4
LT		 689 uspi->s_fsize = block_size = 512;
690 uspi->s_fmask = ~(512 - 1);
691 uspi->s_fshift = 9;
692 uspi->s_sbsize = super_block_size = 1536;
693 uspi->s_sbbase = 0;
694 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
695 break;
696 case UFS_MOUNT_UFSTYPE_UFS2:
abf5d15f 697 UFSD("ufstype=ufs2\n");
7b4ee73e 698 super_block_offset=SBLOCK_UFS2;
1da177e4
LT		 699 uspi->s_fsize = block_size = 512;
700 uspi->s_fmask = ~(512 - 1);
701 uspi->s_fshift = 9;
702 uspi->s_sbsize = super_block_size = 1536;
703 uspi->s_sbbase = 0;
704 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
1da177e4
LT		 705 break;
706
707 case UFS_MOUNT_UFSTYPE_SUN:
abf5d15f 708 UFSD("ufstype=sun\n");
1da177e4
LT		 709 uspi->s_fsize = block_size = 1024;
710 uspi->s_fmask = ~(1024 - 1);
711 uspi->s_fshift = 10;
712 uspi->s_sbsize = super_block_size = 2048;
713 uspi->s_sbbase = 0;
252e211e 714 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 715 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
716 break;
717
252e211e
MF		 718 case UFS_MOUNT_UFSTYPE_SUNOS:
719 UFSD(("ufstype=sunos\n"))
720 uspi->s_fsize = block_size = 1024;
721 uspi->s_fmask = ~(1024 - 1);
722 uspi->s_fshift = 10;
723 uspi->s_sbsize = 2048;
724 super_block_size = 2048;
725 uspi->s_sbbase = 0;
726 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
727 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
728 break;
729
1da177e4 730 case UFS_MOUNT_UFSTYPE_SUNx86:
abf5d15f 731 UFSD("ufstype=sunx86\n");
1da177e4
LT		 732 uspi->s_fsize = block_size = 1024;
733 uspi->s_fmask = ~(1024 - 1);
734 uspi->s_fshift = 10;
735 uspi->s_sbsize = super_block_size = 2048;
736 uspi->s_sbbase = 0;
252e211e 737 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
1da177e4
LT		 738 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
739 break;
740
741 case UFS_MOUNT_UFSTYPE_OLD:
abf5d15f 742 UFSD("ufstype=old\n");
1da177e4
LT		 743 uspi->s_fsize = block_size = 1024;
744 uspi->s_fmask = ~(1024 - 1);
745 uspi->s_fshift = 10;
746 uspi->s_sbsize = super_block_size = 2048;
747 uspi->s_sbbase = 0;
748 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
749 if (!(sb->s_flags & MS_RDONLY)) {
750 if (!silent)
751 printk(KERN_INFO "ufstype=old is supported read-only\n");
752 sb->s_flags |= MS_RDONLY;
753 }
754 break;
755
756 case UFS_MOUNT_UFSTYPE_NEXTSTEP:
f336953b 757 /*TODO: check may be we need set special dir block size?*/
abf5d15f 758 UFSD("ufstype=nextstep\n");
1da177e4
LT		 759 uspi->s_fsize = block_size = 1024;
760 uspi->s_fmask = ~(1024 - 1);
761 uspi->s_fshift = 10;
762 uspi->s_sbsize = super_block_size = 2048;
763 uspi->s_sbbase = 0;
764 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
765 if (!(sb->s_flags & MS_RDONLY)) {
766 if (!silent)
767 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
768 sb->s_flags |= MS_RDONLY;
769 }
770 break;
771
772 case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
f336953b 773 /*TODO: check may be we need set special dir block size?*/
abf5d15f 774 UFSD("ufstype=nextstep-cd\n");
1da177e4
LT		 775 uspi->s_fsize = block_size = 2048;
776 uspi->s_fmask = ~(2048 - 1);
777 uspi->s_fshift = 11;
778 uspi->s_sbsize = super_block_size = 2048;
779 uspi->s_sbbase = 0;
780 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
781 if (!(sb->s_flags & MS_RDONLY)) {
782 if (!silent)
783 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
784 sb->s_flags |= MS_RDONLY;
785 }
786 break;
787
788 case UFS_MOUNT_UFSTYPE_OPENSTEP:
abf5d15f 789 UFSD("ufstype=openstep\n");
1da177e4
LT		 790 uspi->s_fsize = block_size = 1024;
791 uspi->s_fmask = ~(1024 - 1);
792 uspi->s_fshift = 10;
793 uspi->s_sbsize = super_block_size = 2048;
794 uspi->s_sbbase = 0;
f336953b 795 uspi->s_dirblksize = 1024;
1da177e4
LT		 796 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
797 if (!(sb->s_flags & MS_RDONLY)) {
798 if (!silent)
799 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
800 sb->s_flags |= MS_RDONLY;
801 }
802 break;
803
804 case UFS_MOUNT_UFSTYPE_HP:
abf5d15f 805 UFSD("ufstype=hp\n");
1da177e4
LT		 806 uspi->s_fsize = block_size = 1024;
807 uspi->s_fmask = ~(1024 - 1);
808 uspi->s_fshift = 10;
809 uspi->s_sbsize = super_block_size = 2048;
810 uspi->s_sbbase = 0;
811 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
812 if (!(sb->s_flags & MS_RDONLY)) {
813 if (!silent)
814 printk(KERN_INFO "ufstype=hp is supported read-only\n");
815 sb->s_flags |= MS_RDONLY;
816 }
817 break;
818 default:
819 if (!silent)
820 printk("unknown ufstype\n");
821 goto failed;
822 }
823
824again:
825 if (!sb_set_blocksize(sb, block_size)) {
826 printk(KERN_ERR "UFS: failed to set blocksize\n");
827 goto failed;
828 }
829
830 /*
831 * read ufs super block from device
832 */
7b4ee73e
E		 833
834 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
835
1da177e4
LT		 836 if (!ubh)
837 goto failed;
838
7b4ee73e
E		 839 usb1 = ubh_get_usb_first(uspi);
840 usb2 = ubh_get_usb_second(uspi);
841 usb3 = ubh_get_usb_third(uspi);
1da177e4 842
252e211e
MF		 843 /* Sort out mod used on SunOS 4.1.3 for fs_state */
844 uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
845 if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
846 (uspi->s_postblformat != UFS_42POSTBLFMT)) {
847 flags &= ~UFS_ST_MASK;
848 flags |= UFS_ST_SUN;
849 }
850
1da177e4
LT		 851 /*
852 * Check ufs magic number
853 */
854 sbi->s_bytesex = BYTESEX_LE;
855 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
856 case UFS_MAGIC:
857 case UFS2_MAGIC:
858 case UFS_MAGIC_LFN:
859 case UFS_MAGIC_FEA:
860 case UFS_MAGIC_4GB:
861 goto magic_found;
862 }
863 sbi->s_bytesex = BYTESEX_BE;
864 switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
865 case UFS_MAGIC:
866 case UFS2_MAGIC:
867 case UFS_MAGIC_LFN:
868 case UFS_MAGIC_FEA:
869 case UFS_MAGIC_4GB:
870 goto magic_found;
871 }
872
873 if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
874 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
875 || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
876 && uspi->s_sbbase < 256) {
877 ubh_brelse_uspi(uspi);
878 ubh = NULL;
879 uspi->s_sbbase += 8;
880 goto again;
881 }
882 if (!silent)
883 printk("ufs_read_super: bad magic number\n");
884 goto failed;
885
886magic_found:
887 /*
888 * Check block and fragment sizes
889 */
890 uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
891 uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
892 uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
893 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
894 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
895
9e8c4273 896 if (!is_power_of_2(uspi->s_fsize)) {
1da177e4
LT		 897 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
898 uspi->s_fsize);
899 goto failed;
900 }
901 if (uspi->s_fsize < 512) {
902 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
903 uspi->s_fsize);
904 goto failed;
905 }
906 if (uspi->s_fsize > 4096) {
907 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
908 uspi->s_fsize);
909 goto failed;
910 }
9e8c4273 911 if (!is_power_of_2(uspi->s_bsize)) {
1da177e4
LT		 912 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
913 uspi->s_bsize);
914 goto failed;
915 }
916 if (uspi->s_bsize < 4096) {
917 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
918 uspi->s_bsize);
919 goto failed;
920 }
921 if (uspi->s_bsize / uspi->s_fsize > 8) {
922 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
923 uspi->s_bsize / uspi->s_fsize);
924 goto failed;
925 }
926 if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
927 ubh_brelse_uspi(uspi);
928 ubh = NULL;
929 block_size = uspi->s_fsize;
930 super_block_size = uspi->s_sbsize;
abf5d15f 931 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1da177e4
LT		 932 goto again;
933 }
934
f9b7cba1 935 sbi->s_flags = flags;/*after that line some functions use s_flags*/
3313e292 936 ufs_print_super_stuff(sb, usb1, usb2, usb3);
1da177e4
LT		 937
938 /*
939 * Check, if file system was correctly unmounted.
940 * If not, make it read only.
941 */
942 if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
943 ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
944 (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
252e211e 945 (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1da177e4
LT		 946 (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
947 (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
948 switch(usb1->fs_clean) {
949 case UFS_FSCLEAN:
abf5d15f 950 UFSD("fs is clean\n");
1da177e4
LT		 951 break;
952 case UFS_FSSTABLE:
abf5d15f 953 UFSD("fs is stable\n");
1da177e4
LT		 954 break;
955 case UFS_FSOSF1:
abf5d15f 956 UFSD("fs is DEC OSF/1\n");
1da177e4
LT		 957 break;
958 case UFS_FSACTIVE:
959 printk("ufs_read_super: fs is active\n");
960 sb->s_flags |= MS_RDONLY;
961 break;
962 case UFS_FSBAD:
963 printk("ufs_read_super: fs is bad\n");
964 sb->s_flags |= MS_RDONLY;
965 break;
966 default:
967 printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
968 sb->s_flags |= MS_RDONLY;
969 break;
970 }
ee3ffd6c 971 } else {
1da177e4
LT		 972 printk("ufs_read_super: fs needs fsck\n");
973 sb->s_flags |= MS_RDONLY;
974 }
975
976 /*
977 * Read ufs_super_block into internal data structures
978 */
979 sb->s_op = &ufs_super_ops;
980 sb->dq_op = NULL; /***/
981 sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
982
983 uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
984 uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
985 uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
986 uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
987 uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
988 uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
989
990 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
647b7e87
ED		 991 uspi->s_u2_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
992 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
993 } else {
1da177e4
LT		 994 uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
995 uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
996 }
997
998 uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
999 /* s_bsize already set */
1000 /* s_fsize already set */
1001 uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1002 uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1003 uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1004 uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1005 uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1006 uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
abf5d15f
ED		 1007 UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1008 uspi->s_fshift);
1da177e4
LT		 1009 uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1010 uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1011 /* s_sbsize already set */
1012 uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1013 uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1014 uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1015 uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1016 uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1017 uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1018 uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1019 uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
3313e292
ED		 1020
1021 if (uspi->fs_magic == UFS2_MAGIC)
1022 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1023 else
1024 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1025
1da177e4
LT		 1026 uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1027 uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1028 uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1029 uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1030 uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1031 uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1032 uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
647b7e87
ED		 1033 uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1034 uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1da177e4
LT		 1035 uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1036 uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1da177e4
LT		 1037 uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1038 uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1039 uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1040
1041 /*
1042 * Compute another frequently used values
1043 */
1044 uspi->s_fpbmask = uspi->s_fpb - 1;
abf5d15f 1045 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1da177e4 1046 uspi->s_apbshift = uspi->s_bshift - 3;
abf5d15f 1047 else
1da177e4 1048 uspi->s_apbshift = uspi->s_bshift - 2;
abf5d15f 1049
1da177e4
LT		 1050 uspi->s_2apbshift = uspi->s_apbshift * 2;
1051 uspi->s_3apbshift = uspi->s_apbshift * 3;
1052 uspi->s_apb = 1 << uspi->s_apbshift;
1053 uspi->s_2apb = 1 << uspi->s_2apbshift;
1054 uspi->s_3apb = 1 << uspi->s_3apbshift;
1055 uspi->s_apbmask = uspi->s_apb - 1;
1056 uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1057 uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1058 uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1059 uspi->s_bpf = uspi->s_fsize << 3;
1060 uspi->s_bpfshift = uspi->s_fshift + 3;
1061 uspi->s_bpfmask = uspi->s_bpf - 1;
1062 if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1063 UFS_MOUNT_UFSTYPE_44BSD)
1064 uspi->s_maxsymlinklen =
647b7e87 1065 fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1da177e4
LT		 1066
1067 inode = iget(sb, UFS_ROOTINO);
1068 if (!inode || is_bad_inode(inode))
1069 goto failed;
1070 sb->s_root = d_alloc_root(inode);
1071 if (!sb->s_root)
1072 goto dalloc_failed;
1073
ee3ffd6c 1074 ufs_setup_cstotal(sb);
1da177e4
LT		 1075 /*
1076 * Read cylinder group structures
1077 */
1078 if (!(sb->s_flags & MS_RDONLY))
1079 if (!ufs_read_cylinder_structures(sb))
1080 goto failed;
1081
abf5d15f 1082 UFSD("EXIT\n");
1da177e4
LT		 1083 return 0;
1084
1085dalloc_failed:
1086 iput(inode);
1087failed:
f99d49ad
JJ		 1088 if (ubh)
1089 ubh_brelse_uspi (uspi);
1090 kfree (uspi);
1091 kfree(sbi);
1da177e4 1092 sb->s_fs_info = NULL;
abf5d15f 1093 UFSD("EXIT (FAILED)\n");
1da177e4
LT		 1094 return -EINVAL;
1095
1096failed_nomem:
abf5d15f 1097 UFSD("EXIT (NOMEM)\n");
1da177e4
LT		 1098 return -ENOMEM;
1099}
1100
647b7e87
ED		 1101static void ufs_write_super(struct super_block *sb)
1102{
1da177e4
LT		 1103 struct ufs_sb_private_info * uspi;
1104 struct ufs_super_block_first * usb1;
1105 struct ufs_super_block_third * usb3;
1106 unsigned flags;
1107
1108 lock_kernel();
abf5d15f 1109 UFSD("ENTER\n");
1da177e4
LT		 1110 flags = UFS_SB(sb)->s_flags;
1111 uspi = UFS_SB(sb)->s_uspi;
7b4ee73e
E		 1112 usb1 = ubh_get_usb_first(uspi);
1113 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1114
1115 if (!(sb->s_flags & MS_RDONLY)) {
1116 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1117 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1118 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1119 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1120 ufs_set_fs_state(sb, usb1, usb3,
1121 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
ee3ffd6c 1122 ufs_put_cstotal(sb);
1da177e4
LT		 1123 }
1124 sb->s_dirt = 0;
abf5d15f 1125 UFSD("EXIT\n");
1da177e4
LT		 1126 unlock_kernel();
1127}
1128
abf5d15f 1129static void ufs_put_super(struct super_block *sb)
1da177e4
LT		 1130{
1131 struct ufs_sb_info * sbi = UFS_SB(sb);
1132
abf5d15f 1133 UFSD("ENTER\n");
1da177e4
LT		 1134
1135 if (!(sb->s_flags & MS_RDONLY))
ee3ffd6c 1136 ufs_put_super_internal(sb);
1da177e4
LT		 1137
1138 ubh_brelse_uspi (sbi->s_uspi);
1139 kfree (sbi->s_uspi);
1140 kfree (sbi);
1141 sb->s_fs_info = NULL;
647b7e87 1142 UFSD("EXIT\n");
1da177e4
LT		 1143 return;
1144}
1145
1146
1147static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1148{
1149 struct ufs_sb_private_info * uspi;
1150 struct ufs_super_block_first * usb1;
1151 struct ufs_super_block_third * usb3;
1152 unsigned new_mount_opt, ufstype;
1153 unsigned flags;
1154
1155 uspi = UFS_SB(sb)->s_uspi;
1156 flags = UFS_SB(sb)->s_flags;
7b4ee73e
E		 1157 usb1 = ubh_get_usb_first(uspi);
1158 usb3 = ubh_get_usb_third(uspi);
1da177e4
LT		 1159
1160 /*
1161 * Allow the "check" option to be passed as a remount option.
1162 * It is not possible to change ufstype option during remount
1163 */
1164 ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1165 new_mount_opt = 0;
1166 ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1167 if (!ufs_parse_options (data, &new_mount_opt))
1168 return -EINVAL;
1169 if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1170 new_mount_opt |= ufstype;
ee3ffd6c 1171 } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1da177e4
LT		 1172 printk("ufstype can't be changed during remount\n");
1173 return -EINVAL;
1174 }
1175
1176 if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1177 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1178 return 0;
1179 }
1180
1181 /*
1182 * fs was mouted as rw, remounting ro
1183 */
1184 if (*mount_flags & MS_RDONLY) {
ee3ffd6c 1185 ufs_put_super_internal(sb);
1da177e4
LT		 1186 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1187 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
252e211e 1188 || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1da177e4
LT		 1189 || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1190 ufs_set_fs_state(sb, usb1, usb3,
1191 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
9695ef16 1192 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1da177e4
LT		 1193 sb->s_dirt = 0;
1194 sb->s_flags |= MS_RDONLY;
ee3ffd6c 1195 } else {
1da177e4
LT		 1196 /*
1197 * fs was mounted as ro, remounting rw
1198 */
1da177e4
LT		 1199#ifndef CONFIG_UFS_FS_WRITE
1200 printk("ufs was compiled with read-only support, "
1201 "can't be mounted as read-write\n");
1202 return -EINVAL;
1203#else
1204 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
252e211e 1205 ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1da177e4 1206 ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
cbcae39f
ED		 1207 ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1208 ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1da177e4
LT		 1209 printk("this ufstype is read-only supported\n");
1210 return -EINVAL;
1211 }
ee3ffd6c 1212 if (!ufs_read_cylinder_structures(sb)) {
1da177e4
LT		 1213 printk("failed during remounting\n");
1214 return -EPERM;
1215 }
1216 sb->s_flags &= ~MS_RDONLY;
1217#endif
1218 }
1219 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1220 return 0;
1221}
1222
2a9807c0
ED		 1223static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1224{
1225 struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1226 unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1227 struct match_token *tp = tokens;
1228
1229 while (tp->token != Opt_onerror_panic && tp->token != mval)
1230 ++tp;
1231 BUG_ON(tp->token == Opt_onerror_panic);
1232 seq_printf(seq, ",%s", tp->pattern);
1233
1234 mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1235 while (tp->token != Opt_err && tp->token != mval)
1236 ++tp;
1237 BUG_ON(tp->token == Opt_err);
1238 seq_printf(seq, ",%s", tp->pattern);
1239
1240 return 0;
1241}
1242
647b7e87 1243static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1244{
726c3342 1245 struct super_block *sb = dentry->d_sb;
647b7e87
ED		 1246 struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1247 unsigned flags = UFS_SB(sb)->s_flags;
1248 struct ufs_super_block_first *usb1;
1249 struct ufs_super_block_second *usb2;
1250 struct ufs_super_block_third *usb3;
1da177e4
LT		 1251
1252 lock_kernel();
1253
647b7e87
ED		 1254 usb1 = ubh_get_usb_first(uspi);
1255 usb2 = ubh_get_usb_second(uspi);
1256 usb3 = ubh_get_usb_third(uspi);
1da177e4 1257
1da177e4
LT		 1258 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1259 buf->f_type = UFS2_MAGIC;
647b7e87 1260 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
647b7e87 1261 } else {
1da177e4
LT		 1262 buf->f_type = UFS_MAGIC;
1263 buf->f_blocks = uspi->s_dsize;
1da177e4 1264 }
ee3ffd6c
ED		 1265 buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1266 uspi->cs_total.cs_nffree;
1267 buf->f_ffree = uspi->cs_total.cs_nifree;
1da177e4
LT		 1268 buf->f_bsize = sb->s_blocksize;
1269 buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1270 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1271 buf->f_files = uspi->s_ncg * uspi->s_ipg;
1272 buf->f_namelen = UFS_MAXNAMLEN;
1273
1274 unlock_kernel();
1275
1276 return 0;
1277}
1278
e18b890b 1279static struct kmem_cache * ufs_inode_cachep;
1da177e4
LT		 1280
1281static struct inode *ufs_alloc_inode(struct super_block *sb)
1282{
1283 struct ufs_inode_info *ei;
e94b1766 1284 ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 1285 if (!ei)
1286 return NULL;
1287 ei->vfs_inode.i_version = 1;
1288 return &ei->vfs_inode;
1289}
1290
1291static void ufs_destroy_inode(struct inode *inode)
1292{
1293 kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1294}
1295
4ba9b9d0 1296static void init_once(struct kmem_cache * cachep, void *foo)
1da177e4
LT		 1297{
1298 struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1299
a35afb83 1300 inode_init_once(&ei->vfs_inode);
1da177e4 1301}
20c2df83 1302
1da177e4
LT		 1303static int init_inodecache(void)
1304{
1305 ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1306 sizeof(struct ufs_inode_info),
fffb60f9
PJ		 1307 0, (SLAB_RECLAIM_ACCOUNT|
1308 SLAB_MEM_SPREAD),
20c2df83 1309 init_once);
1da177e4
LT		 1310 if (ufs_inode_cachep == NULL)
1311 return -ENOMEM;
1312 return 0;
1313}
1314
1315static void destroy_inodecache(void)
1316{
1a1d92c1 1317 kmem_cache_destroy(ufs_inode_cachep);
1da177e4
LT		 1318}
1319
1320#ifdef CONFIG_QUOTA
1321static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1322static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1323#endif
1324
ee9b6d61 1325static const struct super_operations ufs_super_ops = {
1da177e4
LT		 1326 .alloc_inode = ufs_alloc_inode,
1327 .destroy_inode = ufs_destroy_inode,
1328 .read_inode = ufs_read_inode,
1329 .write_inode = ufs_write_inode,
1330 .delete_inode = ufs_delete_inode,
1331 .put_super = ufs_put_super,
1332 .write_super = ufs_write_super,
1333 .statfs = ufs_statfs,
1334 .remount_fs = ufs_remount,
2a9807c0 1335 .show_options = ufs_show_options,
1da177e4
LT		 1336#ifdef CONFIG_QUOTA
1337 .quota_read = ufs_quota_read,
1338 .quota_write = ufs_quota_write,
1339#endif
1340};
1341
1342#ifdef CONFIG_QUOTA
1343
1344/* Read data from quotafile - avoid pagecache and such because we cannot afford
1345 * acquiring the locks... As quota files are never truncated and quota code
1346 * itself serializes the operations (and noone else should touch the files)
1347 * we don't have to be afraid of races */
1348static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1349 size_t len, loff_t off)
1350{
1351 struct inode *inode = sb_dqopt(sb)->files[type];
1352 sector_t blk = off >> sb->s_blocksize_bits;
1353 int err = 0;
1354 int offset = off & (sb->s_blocksize - 1);
1355 int tocopy;
1356 size_t toread;
1357 struct buffer_head *bh;
1358 loff_t i_size = i_size_read(inode);
1359
1360 if (off > i_size)
1361 return 0;
1362 if (off+len > i_size)
1363 len = i_size-off;
1364 toread = len;
1365 while (toread > 0) {
1366 tocopy = sb->s_blocksize - offset < toread ?
1367 sb->s_blocksize - offset : toread;
1368
1369 bh = ufs_bread(inode, blk, 0, &err);
1370 if (err)
1371 return err;
1372 if (!bh) /* A hole? */
1373 memset(data, 0, tocopy);
1374 else {
1375 memcpy(data, bh->b_data+offset, tocopy);
1376 brelse(bh);
1377 }
1378 offset = 0;
1379 toread -= tocopy;
1380 data += tocopy;
1381 blk++;
1382 }
1383 return len;
1384}
1385
1386/* Write to quotafile */
1387static ssize_t ufs_quota_write(struct super_block *sb, int type,
1388 const char *data, size_t len, loff_t off)
1389{
1390 struct inode *inode = sb_dqopt(sb)->files[type];
1391 sector_t blk = off >> sb->s_blocksize_bits;
1392 int err = 0;
1393 int offset = off & (sb->s_blocksize - 1);
1394 int tocopy;
1395 size_t towrite = len;
1396 struct buffer_head *bh;
1397
5c81a419 1398 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1da177e4
LT		 1399 while (towrite > 0) {
1400 tocopy = sb->s_blocksize - offset < towrite ?
1401 sb->s_blocksize - offset : towrite;
1402
1403 bh = ufs_bread(inode, blk, 1, &err);
1404 if (!bh)
1405 goto out;
1406 lock_buffer(bh);
1407 memcpy(bh->b_data+offset, data, tocopy);
1408 flush_dcache_page(bh->b_page);
1409 set_buffer_uptodate(bh);
1410 mark_buffer_dirty(bh);
1411 unlock_buffer(bh);
1412 brelse(bh);
1413 offset = 0;
1414 towrite -= tocopy;
1415 data += tocopy;
1416 blk++;
1417 }
1418out:
15b2fe39 1419 if (len == towrite) {
1b1dcc1b 1420 mutex_unlock(&inode->i_mutex);
1da177e4 1421 return err;
15b2fe39 1422 }
1da177e4
LT		 1423 if (inode->i_size < off+len-towrite)
1424 i_size_write(inode, off+len-towrite);
1425 inode->i_version++;
1426 inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1427 mark_inode_dirty(inode);
1b1dcc1b 1428 mutex_unlock(&inode->i_mutex);
1da177e4
LT		 1429 return len - towrite;
1430}
1431
1432#endif
1433
454e2398
DH		 1434static int ufs_get_sb(struct file_system_type *fs_type,
1435 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1da177e4 1436{
454e2398 1437 return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1da177e4
LT		 1438}
1439
1440static struct file_system_type ufs_fs_type = {
1441 .owner = THIS_MODULE,
1442 .name = "ufs",
1443 .get_sb = ufs_get_sb,
1444 .kill_sb = kill_block_super,
1445 .fs_flags = FS_REQUIRES_DEV,
1446};
1447
1448static int __init init_ufs_fs(void)
1449{
1450 int err = init_inodecache();
1451 if (err)
1452 goto out1;
1453 err = register_filesystem(&ufs_fs_type);
1454 if (err)
1455 goto out;
1456 return 0;
1457out:
1458 destroy_inodecache();
1459out1:
1460 return err;
1461}
1462
1463static void __exit exit_ufs_fs(void)
1464{
1465 unregister_filesystem(&ufs_fs_type);
1466 destroy_inodecache();
1467}
1468
1469module_init(init_ufs_fs)
1470module_exit(exit_ufs_fs)
1471MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)