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Linux/fs/ufs/super.c

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  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 <gwingerde@gmail.com>
 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  *
 64  * UFS2 write support added by
 65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
 66  */
 67 
 68 #include <linux/exportfs.h>
 69 #include <linux/module.h>
 70 #include <linux/bitops.h>
 71 
 72 #include <stdarg.h>
 73 
 74 #include <linux/uaccess.h>
 75 
 76 #include <linux/errno.h>
 77 #include <linux/fs.h>
 78 #include <linux/slab.h>
 79 #include <linux/time.h>
 80 #include <linux/stat.h>
 81 #include <linux/string.h>
 82 #include <linux/blkdev.h>
 83 #include <linux/backing-dev.h>
 84 #include <linux/init.h>
 85 #include <linux/parser.h>
 86 #include <linux/buffer_head.h>
 87 #include <linux/vfs.h>
 88 #include <linux/log2.h>
 89 #include <linux/mount.h>
 90 #include <linux/seq_file.h>
 91 #include <linux/iversion.h>
 92 
 93 #include "ufs_fs.h"
 94 #include "ufs.h"
 95 #include "swab.h"
 96 #include "util.h"
 97 
 98 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 99 {
100         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
101         struct inode *inode;
102 
103         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
104                 return ERR_PTR(-ESTALE);
105 
106         inode = ufs_iget(sb, ino);
107         if (IS_ERR(inode))
108                 return ERR_CAST(inode);
109         if (generation && inode->i_generation != generation) {
110                 iput(inode);
111                 return ERR_PTR(-ESTALE);
112         }
113         return inode;
114 }
115 
116 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
117                                        int fh_len, int fh_type)
118 {
119         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
120 }
121 
122 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
123                                        int fh_len, int fh_type)
124 {
125         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
126 }
127 
128 static struct dentry *ufs_get_parent(struct dentry *child)
129 {
130         struct qstr dot_dot = QSTR_INIT("..", 2);
131         ino_t ino;
132 
133         ino = ufs_inode_by_name(d_inode(child), &dot_dot);
134         if (!ino)
135                 return ERR_PTR(-ENOENT);
136         return d_obtain_alias(ufs_iget(child->d_sb, ino));
137 }
138 
139 static const struct export_operations ufs_export_ops = {
140         .fh_to_dentry   = ufs_fh_to_dentry,
141         .fh_to_parent   = ufs_fh_to_parent,
142         .get_parent     = ufs_get_parent,
143 };
144 
145 #ifdef CONFIG_UFS_DEBUG
146 /*
147  * Print contents of ufs_super_block, useful for debugging
148  */
149 static void ufs_print_super_stuff(struct super_block *sb,
150                                   struct ufs_super_block_first *usb1,
151                                   struct ufs_super_block_second *usb2,
152                                   struct ufs_super_block_third *usb3)
153 {
154         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
155 
156         pr_debug("ufs_print_super_stuff\n");
157         pr_debug("  magic:     0x%x\n", magic);
158         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
159                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
160                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
161                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
162                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
163                 pr_debug("  bsize:         %u\n",
164                          fs32_to_cpu(sb, usb1->fs_bsize));
165                 pr_debug("  fsize:         %u\n",
166                          fs32_to_cpu(sb, usb1->fs_fsize));
167                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
168                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
169                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
170                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
171                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
172                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
173                          (unsigned long long)
174                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
175                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
176                         (unsigned long long)
177                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
178                 pr_info("  cs_nffree(Num of free frags): %llu\n",
179                         (unsigned long long)
180                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
181                 pr_info("  fs_maxsymlinklen: %u\n",
182                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
183         } else {
184                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
185                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
186                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
187                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
188                 pr_debug(" cgoffset:    %u\n",
189                          fs32_to_cpu(sb, usb1->fs_cgoffset));
190                 pr_debug(" ~cgmask:     0x%x\n",
191                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
192                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
193                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
194                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
195                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
196                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
197                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
198                 pr_debug(" fragshift:   %u\n",
199                          fs32_to_cpu(sb, usb1->fs_fragshift));
200                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
201                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
202                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
203                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
204                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
205                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
206                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
207                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
208                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
209                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
210                 pr_debug(" fstodb:      %u\n",
211                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
212                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
213                 pr_debug(" ndir         %u\n",
214                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
215                 pr_debug(" nifree       %u\n",
216                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
217                 pr_debug(" nbfree       %u\n",
218                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
219                 pr_debug(" nffree       %u\n",
220                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
221         }
222         pr_debug("\n");
223 }
224 
225 /*
226  * Print contents of ufs_cylinder_group, useful for debugging
227  */
228 static void ufs_print_cylinder_stuff(struct super_block *sb,
229                                      struct ufs_cylinder_group *cg)
230 {
231         pr_debug("\nufs_print_cylinder_stuff\n");
232         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
233         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
234         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
235         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
236         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
237         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
238         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
239         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
240         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
241         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
242         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
243         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
244         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
245         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
246         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
247             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
248             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
249             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
250             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
251         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
252         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
253         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
254         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
255         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
256         pr_debug("  clustersumoff %u\n",
257                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
258         pr_debug("  clusteroff    %u\n",
259                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
260         pr_debug("  nclusterblks  %u\n",
261                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
262         pr_debug("\n");
263 }
264 #else
265 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
266 #  define ufs_print_cylinder_stuff(sb, cg) /**/
267 #endif /* CONFIG_UFS_DEBUG */
268 
269 static const struct super_operations ufs_super_ops;
270 
271 void ufs_error (struct super_block * sb, const char * function,
272         const char * fmt, ...)
273 {
274         struct ufs_sb_private_info * uspi;
275         struct ufs_super_block_first * usb1;
276         struct va_format vaf;
277         va_list args;
278 
279         uspi = UFS_SB(sb)->s_uspi;
280         usb1 = ubh_get_usb_first(uspi);
281         
282         if (!sb_rdonly(sb)) {
283                 usb1->fs_clean = UFS_FSBAD;
284                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
285                 ufs_mark_sb_dirty(sb);
286                 sb->s_flags |= SB_RDONLY;
287         }
288         va_start(args, fmt);
289         vaf.fmt = fmt;
290         vaf.va = &args;
291         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
292         case UFS_MOUNT_ONERROR_PANIC:
293                 panic("panic (device %s): %s: %pV\n",
294                       sb->s_id, function, &vaf);
295 
296         case UFS_MOUNT_ONERROR_LOCK:
297         case UFS_MOUNT_ONERROR_UMOUNT:
298         case UFS_MOUNT_ONERROR_REPAIR:
299                 pr_crit("error (device %s): %s: %pV\n",
300                         sb->s_id, function, &vaf);
301         }
302         va_end(args);
303 }
304 
305 void ufs_panic (struct super_block * sb, const char * function,
306         const char * fmt, ...)
307 {
308         struct ufs_sb_private_info * uspi;
309         struct ufs_super_block_first * usb1;
310         struct va_format vaf;
311         va_list args;
312         
313         uspi = UFS_SB(sb)->s_uspi;
314         usb1 = ubh_get_usb_first(uspi);
315         
316         if (!sb_rdonly(sb)) {
317                 usb1->fs_clean = UFS_FSBAD;
318                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
319                 ufs_mark_sb_dirty(sb);
320         }
321         va_start(args, fmt);
322         vaf.fmt = fmt;
323         vaf.va = &args;
324         sb->s_flags |= SB_RDONLY;
325         pr_crit("panic (device %s): %s: %pV\n",
326                 sb->s_id, function, &vaf);
327         va_end(args);
328 }
329 
330 void ufs_warning (struct super_block * sb, const char * function,
331         const char * fmt, ...)
332 {
333         struct va_format vaf;
334         va_list args;
335 
336         va_start(args, fmt);
337         vaf.fmt = fmt;
338         vaf.va = &args;
339         pr_warn("(device %s): %s: %pV\n",
340                 sb->s_id, function, &vaf);
341         va_end(args);
342 }
343 
344 enum {
345        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
346        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
347        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
348        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
349        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
350        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
351        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
352        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
353        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
354        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
355        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
356        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
357        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
358        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
359        Opt_err
360 };
361 
362 static const match_table_t tokens = {
363         {Opt_type_old, "ufstype=old"},
364         {Opt_type_sunx86, "ufstype=sunx86"},
365         {Opt_type_sun, "ufstype=sun"},
366         {Opt_type_sunos, "ufstype=sunos"},
367         {Opt_type_44bsd, "ufstype=44bsd"},
368         {Opt_type_ufs2, "ufstype=ufs2"},
369         {Opt_type_ufs2, "ufstype=5xbsd"},
370         {Opt_type_hp, "ufstype=hp"},
371         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
372         {Opt_type_nextstep, "ufstype=nextstep"},
373         {Opt_type_openstep, "ufstype=openstep"},
374 /*end of possible ufs types */
375         {Opt_onerror_panic, "onerror=panic"},
376         {Opt_onerror_lock, "onerror=lock"},
377         {Opt_onerror_umount, "onerror=umount"},
378         {Opt_onerror_repair, "onerror=repair"},
379         {Opt_err, NULL}
380 };
381 
382 static int ufs_parse_options (char * options, unsigned * mount_options)
383 {
384         char * p;
385         
386         UFSD("ENTER\n");
387         
388         if (!options)
389                 return 1;
390 
391         while ((p = strsep(&options, ",")) != NULL) {
392                 substring_t args[MAX_OPT_ARGS];
393                 int token;
394                 if (!*p)
395                         continue;
396 
397                 token = match_token(p, tokens, args);
398                 switch (token) {
399                 case Opt_type_old:
400                         ufs_clear_opt (*mount_options, UFSTYPE);
401                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
402                         break;
403                 case Opt_type_sunx86:
404                         ufs_clear_opt (*mount_options, UFSTYPE);
405                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
406                         break;
407                 case Opt_type_sun:
408                         ufs_clear_opt (*mount_options, UFSTYPE);
409                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
410                         break;
411                 case Opt_type_sunos:
412                         ufs_clear_opt(*mount_options, UFSTYPE);
413                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
414                         break;
415                 case Opt_type_44bsd:
416                         ufs_clear_opt (*mount_options, UFSTYPE);
417                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
418                         break;
419                 case Opt_type_ufs2:
420                         ufs_clear_opt(*mount_options, UFSTYPE);
421                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
422                         break;
423                 case Opt_type_hp:
424                         ufs_clear_opt (*mount_options, UFSTYPE);
425                         ufs_set_opt (*mount_options, UFSTYPE_HP);
426                         break;
427                 case Opt_type_nextstepcd:
428                         ufs_clear_opt (*mount_options, UFSTYPE);
429                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
430                         break;
431                 case Opt_type_nextstep:
432                         ufs_clear_opt (*mount_options, UFSTYPE);
433                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
434                         break;
435                 case Opt_type_openstep:
436                         ufs_clear_opt (*mount_options, UFSTYPE);
437                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
438                         break;
439                 case Opt_onerror_panic:
440                         ufs_clear_opt (*mount_options, ONERROR);
441                         ufs_set_opt (*mount_options, ONERROR_PANIC);
442                         break;
443                 case Opt_onerror_lock:
444                         ufs_clear_opt (*mount_options, ONERROR);
445                         ufs_set_opt (*mount_options, ONERROR_LOCK);
446                         break;
447                 case Opt_onerror_umount:
448                         ufs_clear_opt (*mount_options, ONERROR);
449                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
450                         break;
451                 case Opt_onerror_repair:
452                         pr_err("Unable to do repair on error, will lock lock instead\n");
453                         ufs_clear_opt (*mount_options, ONERROR);
454                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
455                         break;
456                 default:
457                         pr_err("Invalid option: \"%s\" or missing value\n", p);
458                         return 0;
459                 }
460         }
461         return 1;
462 }
463 
464 /*
465  * Different types of UFS hold fs_cstotal in different
466  * places, and use different data structure for it.
467  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
468  */
469 static void ufs_setup_cstotal(struct super_block *sb)
470 {
471         struct ufs_sb_info *sbi = UFS_SB(sb);
472         struct ufs_sb_private_info *uspi = sbi->s_uspi;
473         struct ufs_super_block_first *usb1;
474         struct ufs_super_block_second *usb2;
475         struct ufs_super_block_third *usb3;
476         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
477 
478         UFSD("ENTER, mtype=%u\n", mtype);
479         usb1 = ubh_get_usb_first(uspi);
480         usb2 = ubh_get_usb_second(uspi);
481         usb3 = ubh_get_usb_third(uspi);
482 
483         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
484              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
485             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
486                 /*we have statistic in different place, then usual*/
487                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
488                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
489                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
490                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
491         } else {
492                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
493                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
494                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
495                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
496         }
497         UFSD("EXIT\n");
498 }
499 
500 /*
501  * Read on-disk structures associated with cylinder groups
502  */
503 static int ufs_read_cylinder_structures(struct super_block *sb)
504 {
505         struct ufs_sb_info *sbi = UFS_SB(sb);
506         struct ufs_sb_private_info *uspi = sbi->s_uspi;
507         struct ufs_buffer_head * ubh;
508         unsigned char * base, * space;
509         unsigned size, blks, i;
510 
511         UFSD("ENTER\n");
512 
513         /*
514          * Read cs structures from (usually) first data block
515          * on the device. 
516          */
517         size = uspi->s_cssize;
518         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
519         base = space = kmalloc(size, GFP_NOFS);
520         if (!base)
521                 goto failed; 
522         sbi->s_csp = (struct ufs_csum *)space;
523         for (i = 0; i < blks; i += uspi->s_fpb) {
524                 size = uspi->s_bsize;
525                 if (i + uspi->s_fpb > blks)
526                         size = (blks - i) * uspi->s_fsize;
527 
528                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
529                 
530                 if (!ubh)
531                         goto failed;
532 
533                 ubh_ubhcpymem (space, ubh, size);
534 
535                 space += size;
536                 ubh_brelse (ubh);
537                 ubh = NULL;
538         }
539 
540         /*
541          * Read cylinder group (we read only first fragment from block
542          * at this time) and prepare internal data structures for cg caching.
543          */
544         sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
545                                    GFP_NOFS);
546         if (!sbi->s_ucg)
547                 goto failed;
548         for (i = 0; i < uspi->s_ncg; i++) 
549                 sbi->s_ucg[i] = NULL;
550         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
551                 sbi->s_ucpi[i] = NULL;
552                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
553         }
554         for (i = 0; i < uspi->s_ncg; i++) {
555                 UFSD("read cg %u\n", i);
556                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
557                         goto failed;
558                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
559                         goto failed;
560 
561                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
562         }
563         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
564                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
565                         goto failed;
566                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
567         }
568         sbi->s_cg_loaded = 0;
569         UFSD("EXIT\n");
570         return 1;
571 
572 failed:
573         kfree (base);
574         if (sbi->s_ucg) {
575                 for (i = 0; i < uspi->s_ncg; i++)
576                         if (sbi->s_ucg[i])
577                                 brelse (sbi->s_ucg[i]);
578                 kfree (sbi->s_ucg);
579                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
580                         kfree (sbi->s_ucpi[i]);
581         }
582         UFSD("EXIT (FAILED)\n");
583         return 0;
584 }
585 
586 /*
587  * Sync our internal copy of fs_cstotal with disk
588  */
589 static void ufs_put_cstotal(struct super_block *sb)
590 {
591         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
592         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
593         struct ufs_super_block_first *usb1;
594         struct ufs_super_block_second *usb2;
595         struct ufs_super_block_third *usb3;
596 
597         UFSD("ENTER\n");
598         usb1 = ubh_get_usb_first(uspi);
599         usb2 = ubh_get_usb_second(uspi);
600         usb3 = ubh_get_usb_third(uspi);
601 
602         if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
603                 /*we have statistic in different place, then usual*/
604                 usb2->fs_un.fs_u2.cs_ndir =
605                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
606                 usb2->fs_un.fs_u2.cs_nbfree =
607                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
608                 usb3->fs_un1.fs_u2.cs_nifree =
609                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
610                 usb3->fs_un1.fs_u2.cs_nffree =
611                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
612                 goto out;
613         }
614 
615         if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
616              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
617                 /* store stats in both old and new places */
618                 usb2->fs_un.fs_u2.cs_ndir =
619                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
620                 usb2->fs_un.fs_u2.cs_nbfree =
621                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
622                 usb3->fs_un1.fs_u2.cs_nifree =
623                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
624                 usb3->fs_un1.fs_u2.cs_nffree =
625                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
626         }
627         usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
628         usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
629         usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
630         usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
631 out:
632         ubh_mark_buffer_dirty(USPI_UBH(uspi));
633         ufs_print_super_stuff(sb, usb1, usb2, usb3);
634         UFSD("EXIT\n");
635 }
636 
637 /**
638  * ufs_put_super_internal() - put on-disk intrenal structures
639  * @sb: pointer to super_block structure
640  * Put on-disk structures associated with cylinder groups
641  * and write them back to disk, also update cs_total on disk
642  */
643 static void ufs_put_super_internal(struct super_block *sb)
644 {
645         struct ufs_sb_info *sbi = UFS_SB(sb);
646         struct ufs_sb_private_info *uspi = sbi->s_uspi;
647         struct ufs_buffer_head * ubh;
648         unsigned char * base, * space;
649         unsigned blks, size, i;
650 
651         
652         UFSD("ENTER\n");
653 
654         ufs_put_cstotal(sb);
655         size = uspi->s_cssize;
656         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
657         base = space = (char*) sbi->s_csp;
658         for (i = 0; i < blks; i += uspi->s_fpb) {
659                 size = uspi->s_bsize;
660                 if (i + uspi->s_fpb > blks)
661                         size = (blks - i) * uspi->s_fsize;
662 
663                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
664 
665                 ubh_memcpyubh (ubh, space, size);
666                 space += size;
667                 ubh_mark_buffer_uptodate (ubh, 1);
668                 ubh_mark_buffer_dirty (ubh);
669                 ubh_brelse (ubh);
670         }
671         for (i = 0; i < sbi->s_cg_loaded; i++) {
672                 ufs_put_cylinder (sb, i);
673                 kfree (sbi->s_ucpi[i]);
674         }
675         for (; i < UFS_MAX_GROUP_LOADED; i++) 
676                 kfree (sbi->s_ucpi[i]);
677         for (i = 0; i < uspi->s_ncg; i++) 
678                 brelse (sbi->s_ucg[i]);
679         kfree (sbi->s_ucg);
680         kfree (base);
681 
682         UFSD("EXIT\n");
683 }
684 
685 static int ufs_sync_fs(struct super_block *sb, int wait)
686 {
687         struct ufs_sb_private_info * uspi;
688         struct ufs_super_block_first * usb1;
689         struct ufs_super_block_third * usb3;
690         unsigned flags;
691 
692         mutex_lock(&UFS_SB(sb)->s_lock);
693 
694         UFSD("ENTER\n");
695 
696         flags = UFS_SB(sb)->s_flags;
697         uspi = UFS_SB(sb)->s_uspi;
698         usb1 = ubh_get_usb_first(uspi);
699         usb3 = ubh_get_usb_third(uspi);
700 
701         usb1->fs_time = ufs_get_seconds(sb);
702         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
703             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
704             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
705                 ufs_set_fs_state(sb, usb1, usb3,
706                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
707         ufs_put_cstotal(sb);
708 
709         UFSD("EXIT\n");
710         mutex_unlock(&UFS_SB(sb)->s_lock);
711 
712         return 0;
713 }
714 
715 static void delayed_sync_fs(struct work_struct *work)
716 {
717         struct ufs_sb_info *sbi;
718 
719         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
720 
721         spin_lock(&sbi->work_lock);
722         sbi->work_queued = 0;
723         spin_unlock(&sbi->work_lock);
724 
725         ufs_sync_fs(sbi->sb, 1);
726 }
727 
728 void ufs_mark_sb_dirty(struct super_block *sb)
729 {
730         struct ufs_sb_info *sbi = UFS_SB(sb);
731         unsigned long delay;
732 
733         spin_lock(&sbi->work_lock);
734         if (!sbi->work_queued) {
735                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
736                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
737                 sbi->work_queued = 1;
738         }
739         spin_unlock(&sbi->work_lock);
740 }
741 
742 static void ufs_put_super(struct super_block *sb)
743 {
744         struct ufs_sb_info * sbi = UFS_SB(sb);
745 
746         UFSD("ENTER\n");
747 
748         if (!sb_rdonly(sb))
749                 ufs_put_super_internal(sb);
750         cancel_delayed_work_sync(&sbi->sync_work);
751 
752         ubh_brelse_uspi (sbi->s_uspi);
753         kfree (sbi->s_uspi);
754         kfree (sbi);
755         sb->s_fs_info = NULL;
756         UFSD("EXIT\n");
757         return;
758 }
759 
760 static u64 ufs_max_bytes(struct super_block *sb)
761 {
762         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
763         int bits = uspi->s_apbshift;
764         u64 res;
765 
766         if (bits > 21)
767                 res = ~0ULL;
768         else
769                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
770                         (1LL << (3*bits));
771 
772         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
773                 return MAX_LFS_FILESIZE;
774         return res << uspi->s_bshift;
775 }
776 
777 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
778 {
779         struct ufs_sb_info * sbi;
780         struct ufs_sb_private_info * uspi;
781         struct ufs_super_block_first * usb1;
782         struct ufs_super_block_second * usb2;
783         struct ufs_super_block_third * usb3;
784         struct ufs_buffer_head * ubh;   
785         struct inode *inode;
786         unsigned block_size, super_block_size;
787         unsigned flags;
788         unsigned super_block_offset;
789         unsigned maxsymlen;
790         int ret = -EINVAL;
791 
792         uspi = NULL;
793         ubh = NULL;
794         flags = 0;
795         
796         UFSD("ENTER\n");
797 
798 #ifndef CONFIG_UFS_FS_WRITE
799         if (!sb_rdonly(sb)) {
800                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
801                 return -EROFS;
802         }
803 #endif
804                 
805         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
806         if (!sbi)
807                 goto failed_nomem;
808         sb->s_fs_info = sbi;
809         sbi->sb = sb;
810 
811         UFSD("flag %u\n", (int)(sb_rdonly(sb)));
812         
813         mutex_init(&sbi->s_lock);
814         spin_lock_init(&sbi->work_lock);
815         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
816         /*
817          * Set default mount options
818          * Parse mount options
819          */
820         sbi->s_mount_opt = 0;
821         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
822         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
823                 pr_err("wrong mount options\n");
824                 goto failed;
825         }
826         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
827                 if (!silent)
828                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
829                         "mount -t ufs -o ufstype="
830                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
831                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
832                         "default is ufstype=old\n");
833                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
834         }
835 
836         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
837         sbi->s_uspi = uspi;
838         if (!uspi)
839                 goto failed;
840         uspi->s_dirblksize = UFS_SECTOR_SIZE;
841         super_block_offset=UFS_SBLOCK;
842 
843         sb->s_maxbytes = MAX_LFS_FILESIZE;
844 
845         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
846         case UFS_MOUNT_UFSTYPE_44BSD:
847                 UFSD("ufstype=44bsd\n");
848                 uspi->s_fsize = block_size = 512;
849                 uspi->s_fmask = ~(512 - 1);
850                 uspi->s_fshift = 9;
851                 uspi->s_sbsize = super_block_size = 1536;
852                 uspi->s_sbbase = 0;
853                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
854                 break;
855         case UFS_MOUNT_UFSTYPE_UFS2:
856                 UFSD("ufstype=ufs2\n");
857                 super_block_offset=SBLOCK_UFS2;
858                 uspi->s_fsize = block_size = 512;
859                 uspi->s_fmask = ~(512 - 1);
860                 uspi->s_fshift = 9;
861                 uspi->s_sbsize = super_block_size = 1536;
862                 uspi->s_sbbase =  0;
863                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
864                 break;
865                 
866         case UFS_MOUNT_UFSTYPE_SUN:
867                 UFSD("ufstype=sun\n");
868                 uspi->s_fsize = block_size = 1024;
869                 uspi->s_fmask = ~(1024 - 1);
870                 uspi->s_fshift = 10;
871                 uspi->s_sbsize = super_block_size = 2048;
872                 uspi->s_sbbase = 0;
873                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
874                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
875                 break;
876 
877         case UFS_MOUNT_UFSTYPE_SUNOS:
878                 UFSD("ufstype=sunos\n");
879                 uspi->s_fsize = block_size = 1024;
880                 uspi->s_fmask = ~(1024 - 1);
881                 uspi->s_fshift = 10;
882                 uspi->s_sbsize = 2048;
883                 super_block_size = 2048;
884                 uspi->s_sbbase = 0;
885                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
886                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
887                 break;
888 
889         case UFS_MOUNT_UFSTYPE_SUNx86:
890                 UFSD("ufstype=sunx86\n");
891                 uspi->s_fsize = block_size = 1024;
892                 uspi->s_fmask = ~(1024 - 1);
893                 uspi->s_fshift = 10;
894                 uspi->s_sbsize = super_block_size = 2048;
895                 uspi->s_sbbase = 0;
896                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
897                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
898                 break;
899 
900         case UFS_MOUNT_UFSTYPE_OLD:
901                 UFSD("ufstype=old\n");
902                 uspi->s_fsize = block_size = 1024;
903                 uspi->s_fmask = ~(1024 - 1);
904                 uspi->s_fshift = 10;
905                 uspi->s_sbsize = super_block_size = 2048;
906                 uspi->s_sbbase = 0;
907                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
908                 if (!sb_rdonly(sb)) {
909                         if (!silent)
910                                 pr_info("ufstype=old is supported read-only\n");
911                         sb->s_flags |= SB_RDONLY;
912                 }
913                 break;
914         
915         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
916                 UFSD("ufstype=nextstep\n");
917                 uspi->s_fsize = block_size = 1024;
918                 uspi->s_fmask = ~(1024 - 1);
919                 uspi->s_fshift = 10;
920                 uspi->s_sbsize = super_block_size = 2048;
921                 uspi->s_sbbase = 0;
922                 uspi->s_dirblksize = 1024;
923                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
924                 if (!sb_rdonly(sb)) {
925                         if (!silent)
926                                 pr_info("ufstype=nextstep is supported read-only\n");
927                         sb->s_flags |= SB_RDONLY;
928                 }
929                 break;
930         
931         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
932                 UFSD("ufstype=nextstep-cd\n");
933                 uspi->s_fsize = block_size = 2048;
934                 uspi->s_fmask = ~(2048 - 1);
935                 uspi->s_fshift = 11;
936                 uspi->s_sbsize = super_block_size = 2048;
937                 uspi->s_sbbase = 0;
938                 uspi->s_dirblksize = 1024;
939                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
940                 if (!sb_rdonly(sb)) {
941                         if (!silent)
942                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
943                         sb->s_flags |= SB_RDONLY;
944                 }
945                 break;
946         
947         case UFS_MOUNT_UFSTYPE_OPENSTEP:
948                 UFSD("ufstype=openstep\n");
949                 uspi->s_fsize = block_size = 1024;
950                 uspi->s_fmask = ~(1024 - 1);
951                 uspi->s_fshift = 10;
952                 uspi->s_sbsize = super_block_size = 2048;
953                 uspi->s_sbbase = 0;
954                 uspi->s_dirblksize = 1024;
955                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
956                 if (!sb_rdonly(sb)) {
957                         if (!silent)
958                                 pr_info("ufstype=openstep is supported read-only\n");
959                         sb->s_flags |= SB_RDONLY;
960                 }
961                 break;
962         
963         case UFS_MOUNT_UFSTYPE_HP:
964                 UFSD("ufstype=hp\n");
965                 uspi->s_fsize = block_size = 1024;
966                 uspi->s_fmask = ~(1024 - 1);
967                 uspi->s_fshift = 10;
968                 uspi->s_sbsize = super_block_size = 2048;
969                 uspi->s_sbbase = 0;
970                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
971                 if (!sb_rdonly(sb)) {
972                         if (!silent)
973                                 pr_info("ufstype=hp is supported read-only\n");
974                         sb->s_flags |= SB_RDONLY;
975                 }
976                 break;
977         default:
978                 if (!silent)
979                         pr_err("unknown ufstype\n");
980                 goto failed;
981         }
982         
983 again:  
984         if (!sb_set_blocksize(sb, block_size)) {
985                 pr_err("failed to set blocksize\n");
986                 goto failed;
987         }
988 
989         /*
990          * read ufs super block from device
991          */
992 
993         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
994         
995         if (!ubh) 
996             goto failed;
997 
998         usb1 = ubh_get_usb_first(uspi);
999         usb2 = ubh_get_usb_second(uspi);
1000         usb3 = ubh_get_usb_third(uspi);
1001 
1002         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1003         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1004         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1005             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1006                 flags &= ~UFS_ST_MASK;
1007                 flags |=  UFS_ST_SUN;
1008         }
1009 
1010         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1011             uspi->s_postblformat == UFS_42POSTBLFMT) {
1012                 if (!silent)
1013                         pr_err("this is not a 44bsd filesystem");
1014                 goto failed;
1015         }
1016 
1017         /*
1018          * Check ufs magic number
1019          */
1020         sbi->s_bytesex = BYTESEX_LE;
1021         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1022                 case UFS_MAGIC:
1023                 case UFS_MAGIC_BW:
1024                 case UFS2_MAGIC:
1025                 case UFS_MAGIC_LFN:
1026                 case UFS_MAGIC_FEA:
1027                 case UFS_MAGIC_4GB:
1028                         goto magic_found;
1029         }
1030         sbi->s_bytesex = BYTESEX_BE;
1031         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1032                 case UFS_MAGIC:
1033                 case UFS_MAGIC_BW:
1034                 case UFS2_MAGIC:
1035                 case UFS_MAGIC_LFN:
1036                 case UFS_MAGIC_FEA:
1037                 case UFS_MAGIC_4GB:
1038                         goto magic_found;
1039         }
1040 
1041         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1042           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1043           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1044           && uspi->s_sbbase < 256) {
1045                 ubh_brelse_uspi(uspi);
1046                 ubh = NULL;
1047                 uspi->s_sbbase += 8;
1048                 goto again;
1049         }
1050         if (!silent)
1051                 pr_err("%s(): bad magic number\n", __func__);
1052         goto failed;
1053 
1054 magic_found:
1055         /*
1056          * Check block and fragment sizes
1057          */
1058         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1059         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1060         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1061         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1062         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1063 
1064         if (!is_power_of_2(uspi->s_fsize)) {
1065                 pr_err("%s(): fragment size %u is not a power of 2\n",
1066                        __func__, uspi->s_fsize);
1067                 goto failed;
1068         }
1069         if (uspi->s_fsize < 512) {
1070                 pr_err("%s(): fragment size %u is too small\n",
1071                        __func__, uspi->s_fsize);
1072                 goto failed;
1073         }
1074         if (uspi->s_fsize > 4096) {
1075                 pr_err("%s(): fragment size %u is too large\n",
1076                        __func__, uspi->s_fsize);
1077                 goto failed;
1078         }
1079         if (!is_power_of_2(uspi->s_bsize)) {
1080                 pr_err("%s(): block size %u is not a power of 2\n",
1081                        __func__, uspi->s_bsize);
1082                 goto failed;
1083         }
1084         if (uspi->s_bsize < 4096) {
1085                 pr_err("%s(): block size %u is too small\n",
1086                        __func__, uspi->s_bsize);
1087                 goto failed;
1088         }
1089         if (uspi->s_bsize / uspi->s_fsize > 8) {
1090                 pr_err("%s(): too many fragments per block (%u)\n",
1091                        __func__, uspi->s_bsize / uspi->s_fsize);
1092                 goto failed;
1093         }
1094         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1095                 ubh_brelse_uspi(uspi);
1096                 ubh = NULL;
1097                 block_size = uspi->s_fsize;
1098                 super_block_size = uspi->s_sbsize;
1099                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1100                 goto again;
1101         }
1102 
1103         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1104         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1105 
1106         /*
1107          * Check, if file system was correctly unmounted.
1108          * If not, make it read only.
1109          */
1110         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1111           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1112           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1113             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1114           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1115           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1116                 switch(usb1->fs_clean) {
1117                 case UFS_FSCLEAN:
1118                         UFSD("fs is clean\n");
1119                         break;
1120                 case UFS_FSSTABLE:
1121                         UFSD("fs is stable\n");
1122                         break;
1123                 case UFS_FSLOG:
1124                         UFSD("fs is logging fs\n");
1125                         break;
1126                 case UFS_FSOSF1:
1127                         UFSD("fs is DEC OSF/1\n");
1128                         break;
1129                 case UFS_FSACTIVE:
1130                         pr_err("%s(): fs is active\n", __func__);
1131                         sb->s_flags |= SB_RDONLY;
1132                         break;
1133                 case UFS_FSBAD:
1134                         pr_err("%s(): fs is bad\n", __func__);
1135                         sb->s_flags |= SB_RDONLY;
1136                         break;
1137                 default:
1138                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1139                                __func__, usb1->fs_clean);
1140                         sb->s_flags |= SB_RDONLY;
1141                         break;
1142                 }
1143         } else {
1144                 pr_err("%s(): fs needs fsck\n", __func__);
1145                 sb->s_flags |= SB_RDONLY;
1146         }
1147 
1148         /*
1149          * Read ufs_super_block into internal data structures
1150          */
1151         sb->s_op = &ufs_super_ops;
1152         sb->s_export_op = &ufs_export_ops;
1153 
1154         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1155 
1156         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1157         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1158         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1159         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1160         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1161         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1162 
1163         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1164                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1165                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1166         } else {
1167                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1168                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1169         }
1170 
1171         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1172         /* s_bsize already set */
1173         /* s_fsize already set */
1174         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1175         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1176         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1177         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1178         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1179         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1180         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1181                 uspi->s_fshift);
1182         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1183         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1184         /* s_sbsize already set */
1185         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1186         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1187         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1188         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1189         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1190         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1191         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1192         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1193 
1194         if (uspi->fs_magic == UFS2_MAGIC)
1195                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1196         else
1197                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1198 
1199         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1200         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1201         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1202         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1203         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1204         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1205         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1206         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1207         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1208         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1209         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1210         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1211         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1212         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1213 
1214         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1215                                               uspi->s_minfree, 100);
1216         if (uspi->s_minfree <= 5) {
1217                 uspi->s_time_to_space = ~0ULL;
1218                 uspi->s_space_to_time = 0;
1219                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1220         } else {
1221                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1222                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1223                                               uspi->s_minfree - 2, 100) - 1;
1224         }
1225 
1226         /*
1227          * Compute another frequently used values
1228          */
1229         uspi->s_fpbmask = uspi->s_fpb - 1;
1230         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1231                 uspi->s_apbshift = uspi->s_bshift - 3;
1232         else
1233                 uspi->s_apbshift = uspi->s_bshift - 2;
1234 
1235         uspi->s_2apbshift = uspi->s_apbshift * 2;
1236         uspi->s_3apbshift = uspi->s_apbshift * 3;
1237         uspi->s_apb = 1 << uspi->s_apbshift;
1238         uspi->s_2apb = 1 << uspi->s_2apbshift;
1239         uspi->s_3apb = 1 << uspi->s_3apbshift;
1240         uspi->s_apbmask = uspi->s_apb - 1;
1241         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1242         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1243         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1244         uspi->s_bpf = uspi->s_fsize << 3;
1245         uspi->s_bpfshift = uspi->s_fshift + 3;
1246         uspi->s_bpfmask = uspi->s_bpf - 1;
1247         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1248             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1249                 uspi->s_maxsymlinklen =
1250                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1251 
1252         if (uspi->fs_magic == UFS2_MAGIC)
1253                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1254         else
1255                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1256         if (uspi->s_maxsymlinklen > maxsymlen) {
1257                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1258                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1259                 uspi->s_maxsymlinklen = maxsymlen;
1260         }
1261         sb->s_maxbytes = ufs_max_bytes(sb);
1262         sb->s_max_links = UFS_LINK_MAX;
1263 
1264         inode = ufs_iget(sb, UFS_ROOTINO);
1265         if (IS_ERR(inode)) {
1266                 ret = PTR_ERR(inode);
1267                 goto failed;
1268         }
1269         sb->s_root = d_make_root(inode);
1270         if (!sb->s_root) {
1271                 ret = -ENOMEM;
1272                 goto failed;
1273         }
1274 
1275         ufs_setup_cstotal(sb);
1276         /*
1277          * Read cylinder group structures
1278          */
1279         if (!sb_rdonly(sb))
1280                 if (!ufs_read_cylinder_structures(sb))
1281                         goto failed;
1282 
1283         UFSD("EXIT\n");
1284         return 0;
1285 
1286 failed:
1287         if (ubh)
1288                 ubh_brelse_uspi (uspi);
1289         kfree (uspi);
1290         kfree(sbi);
1291         sb->s_fs_info = NULL;
1292         UFSD("EXIT (FAILED)\n");
1293         return ret;
1294 
1295 failed_nomem:
1296         UFSD("EXIT (NOMEM)\n");
1297         return -ENOMEM;
1298 }
1299 
1300 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1301 {
1302         struct ufs_sb_private_info * uspi;
1303         struct ufs_super_block_first * usb1;
1304         struct ufs_super_block_third * usb3;
1305         unsigned new_mount_opt, ufstype;
1306         unsigned flags;
1307 
1308         sync_filesystem(sb);
1309         mutex_lock(&UFS_SB(sb)->s_lock);
1310         uspi = UFS_SB(sb)->s_uspi;
1311         flags = UFS_SB(sb)->s_flags;
1312         usb1 = ubh_get_usb_first(uspi);
1313         usb3 = ubh_get_usb_third(uspi);
1314         
1315         /*
1316          * Allow the "check" option to be passed as a remount option.
1317          * It is not possible to change ufstype option during remount
1318          */
1319         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1320         new_mount_opt = 0;
1321         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1322         if (!ufs_parse_options (data, &new_mount_opt)) {
1323                 mutex_unlock(&UFS_SB(sb)->s_lock);
1324                 return -EINVAL;
1325         }
1326         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1327                 new_mount_opt |= ufstype;
1328         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1329                 pr_err("ufstype can't be changed during remount\n");
1330                 mutex_unlock(&UFS_SB(sb)->s_lock);
1331                 return -EINVAL;
1332         }
1333 
1334         if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1335                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1336                 mutex_unlock(&UFS_SB(sb)->s_lock);
1337                 return 0;
1338         }
1339         
1340         /*
1341          * fs was mouted as rw, remounting ro
1342          */
1343         if (*mount_flags & SB_RDONLY) {
1344                 ufs_put_super_internal(sb);
1345                 usb1->fs_time = ufs_get_seconds(sb);
1346                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1347                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1348                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1349                         ufs_set_fs_state(sb, usb1, usb3,
1350                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1351                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1352                 sb->s_flags |= SB_RDONLY;
1353         } else {
1354         /*
1355          * fs was mounted as ro, remounting rw
1356          */
1357 #ifndef CONFIG_UFS_FS_WRITE
1358                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1359                 mutex_unlock(&UFS_SB(sb)->s_lock);
1360                 return -EINVAL;
1361 #else
1362                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1363                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1364                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1365                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1366                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1367                         pr_err("this ufstype is read-only supported\n");
1368                         mutex_unlock(&UFS_SB(sb)->s_lock);
1369                         return -EINVAL;
1370                 }
1371                 if (!ufs_read_cylinder_structures(sb)) {
1372                         pr_err("failed during remounting\n");
1373                         mutex_unlock(&UFS_SB(sb)->s_lock);
1374                         return -EPERM;
1375                 }
1376                 sb->s_flags &= ~SB_RDONLY;
1377 #endif
1378         }
1379         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1380         mutex_unlock(&UFS_SB(sb)->s_lock);
1381         return 0;
1382 }
1383 
1384 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1385 {
1386         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1387         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1388         const struct match_token *tp = tokens;
1389 
1390         while (tp->token != Opt_onerror_panic && tp->token != mval)
1391                 ++tp;
1392         BUG_ON(tp->token == Opt_onerror_panic);
1393         seq_printf(seq, ",%s", tp->pattern);
1394 
1395         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1396         while (tp->token != Opt_err && tp->token != mval)
1397                 ++tp;
1398         BUG_ON(tp->token == Opt_err);
1399         seq_printf(seq, ",%s", tp->pattern);
1400 
1401         return 0;
1402 }
1403 
1404 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1405 {
1406         struct super_block *sb = dentry->d_sb;
1407         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1408         unsigned  flags = UFS_SB(sb)->s_flags;
1409         struct ufs_super_block_third *usb3;
1410         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1411 
1412         mutex_lock(&UFS_SB(sb)->s_lock);
1413         usb3 = ubh_get_usb_third(uspi);
1414         
1415         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1416                 buf->f_type = UFS2_MAGIC;
1417         else
1418                 buf->f_type = UFS_MAGIC;
1419 
1420         buf->f_blocks = uspi->s_dsize;
1421         buf->f_bfree = ufs_freefrags(uspi);
1422         buf->f_ffree = uspi->cs_total.cs_nifree;
1423         buf->f_bsize = sb->s_blocksize;
1424         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1425                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1426         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1427         buf->f_namelen = UFS_MAXNAMLEN;
1428         buf->f_fsid.val[0] = (u32)id;
1429         buf->f_fsid.val[1] = (u32)(id >> 32);
1430 
1431         mutex_unlock(&UFS_SB(sb)->s_lock);
1432 
1433         return 0;
1434 }
1435 
1436 static struct kmem_cache * ufs_inode_cachep;
1437 
1438 static struct inode *ufs_alloc_inode(struct super_block *sb)
1439 {
1440         struct ufs_inode_info *ei;
1441 
1442         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1443         if (!ei)
1444                 return NULL;
1445 
1446         inode_set_iversion(&ei->vfs_inode, 1);
1447         seqlock_init(&ei->meta_lock);
1448         mutex_init(&ei->truncate_mutex);
1449         return &ei->vfs_inode;
1450 }
1451 
1452 static void ufs_i_callback(struct rcu_head *head)
1453 {
1454         struct inode *inode = container_of(head, struct inode, i_rcu);
1455         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1456 }
1457 
1458 static void ufs_destroy_inode(struct inode *inode)
1459 {
1460         call_rcu(&inode->i_rcu, ufs_i_callback);
1461 }
1462 
1463 static void init_once(void *foo)
1464 {
1465         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1466 
1467         inode_init_once(&ei->vfs_inode);
1468 }
1469 
1470 static int __init init_inodecache(void)
1471 {
1472         ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1473                                 sizeof(struct ufs_inode_info), 0,
1474                                 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1475                                         SLAB_ACCOUNT),
1476                                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1477                                 sizeof_field(struct ufs_inode_info,
1478                                         i_u1.i_symlink),
1479                                 init_once);
1480         if (ufs_inode_cachep == NULL)
1481                 return -ENOMEM;
1482         return 0;
1483 }
1484 
1485 static void destroy_inodecache(void)
1486 {
1487         /*
1488          * Make sure all delayed rcu free inodes are flushed before we
1489          * destroy cache.
1490          */
1491         rcu_barrier();
1492         kmem_cache_destroy(ufs_inode_cachep);
1493 }
1494 
1495 static const struct super_operations ufs_super_ops = {
1496         .alloc_inode    = ufs_alloc_inode,
1497         .destroy_inode  = ufs_destroy_inode,
1498         .write_inode    = ufs_write_inode,
1499         .evict_inode    = ufs_evict_inode,
1500         .put_super      = ufs_put_super,
1501         .sync_fs        = ufs_sync_fs,
1502         .statfs         = ufs_statfs,
1503         .remount_fs     = ufs_remount,
1504         .show_options   = ufs_show_options,
1505 };
1506 
1507 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1508         int flags, const char *dev_name, void *data)
1509 {
1510         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1511 }
1512 
1513 static struct file_system_type ufs_fs_type = {
1514         .owner          = THIS_MODULE,
1515         .name           = "ufs",
1516         .mount          = ufs_mount,
1517         .kill_sb        = kill_block_super,
1518         .fs_flags       = FS_REQUIRES_DEV,
1519 };
1520 MODULE_ALIAS_FS("ufs");
1521 
1522 static int __init init_ufs_fs(void)
1523 {
1524         int err = init_inodecache();
1525         if (err)
1526                 goto out1;
1527         err = register_filesystem(&ufs_fs_type);
1528         if (err)
1529                 goto out;
1530         return 0;
1531 out:
1532         destroy_inodecache();
1533 out1:
1534         return err;
1535 }
1536 
1537 static void __exit exit_ufs_fs(void)
1538 {
1539         unregister_filesystem(&ufs_fs_type);
1540         destroy_inodecache();
1541 }
1542 
1543 module_init(init_ufs_fs)
1544 module_exit(exit_ufs_fs)
1545 MODULE_LICENSE("GPL");
1546 

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