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Linux/fs/ufs/super.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  *  linux/fs/ufs/super.c
  4  *
  5  * Copyright (C) 1998
  6  * Daniel Pirkl <daniel.pirkl@email.cz>
  7  * Charles University, Faculty of Mathematics and Physics
  8  */
  9 
 10 /* Derived from
 11  *
 12  *  linux/fs/ext2/super.c
 13  *
 14  * Copyright (C) 1992, 1993, 1994, 1995
 15  * Remy Card (card@masi.ibp.fr)
 16  * Laboratoire MASI - Institut Blaise Pascal
 17  * Universite Pierre et Marie Curie (Paris VI)
 18  *
 19  *  from
 20  *
 21  *  linux/fs/minix/inode.c
 22  *
 23  *  Copyright (C) 1991, 1992  Linus Torvalds
 24  *
 25  *  Big-endian to little-endian byte-swapping/bitmaps by
 26  *        David S. Miller (davem@caip.rutgers.edu), 1995
 27  */
 28  
 29 /*
 30  * Inspired by
 31  *
 32  *  linux/fs/ufs/super.c
 33  *
 34  * Copyright (C) 1996
 35  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
 36  * Laboratory for Computer Science Research Computing Facility
 37  * Rutgers, The State University of New Jersey
 38  *
 39  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
 40  *
 41  * Kernel module support added on 96/04/26 by
 42  * Stefan Reinauer <stepan@home.culture.mipt.ru>
 43  *
 44  * Module usage counts added on 96/04/29 by
 45  * Gertjan van Wingerde <gwingerde@gmail.com>
 46  *
 47  * Clean swab support on 19970406 by
 48  * Francois-Rene Rideau <fare@tunes.org>
 49  *
 50  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
 51  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
 52  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
 53  *
 54  * NeXTstep support added on February 5th 1998 by
 55  * Niels Kristian Bech Jensen <nkbj@image.dk>.
 56  *
 57  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
 58  * 
 59  * HP/UX hfs filesystem support added by
 60  * Martin K. Petersen <mkp@mkp.net>, August 1999
 61  *
 62  * UFS2 (of FreeBSD 5.x) support added by
 63  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
 64  *
 65  * UFS2 write support added by
 66  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
 67  */
 68 
 69 #include <linux/exportfs.h>
 70 #include <linux/module.h>
 71 #include <linux/bitops.h>
 72 
 73 #include <stdarg.h>
 74 
 75 #include <linux/uaccess.h>
 76 
 77 #include <linux/errno.h>
 78 #include <linux/fs.h>
 79 #include <linux/slab.h>
 80 #include <linux/time.h>
 81 #include <linux/stat.h>
 82 #include <linux/string.h>
 83 #include <linux/blkdev.h>
 84 #include <linux/backing-dev.h>
 85 #include <linux/init.h>
 86 #include <linux/parser.h>
 87 #include <linux/buffer_head.h>
 88 #include <linux/vfs.h>
 89 #include <linux/log2.h>
 90 #include <linux/mount.h>
 91 #include <linux/seq_file.h>
 92 #include <linux/iversion.h>
 93 
 94 #include "ufs_fs.h"
 95 #include "ufs.h"
 96 #include "swab.h"
 97 #include "util.h"
 98 
 99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
100 {
101         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
102         struct inode *inode;
103 
104         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
105                 return ERR_PTR(-ESTALE);
106 
107         inode = ufs_iget(sb, ino);
108         if (IS_ERR(inode))
109                 return ERR_CAST(inode);
110         if (generation && inode->i_generation != generation) {
111                 iput(inode);
112                 return ERR_PTR(-ESTALE);
113         }
114         return inode;
115 }
116 
117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
118                                        int fh_len, int fh_type)
119 {
120         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
121 }
122 
123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
124                                        int fh_len, int fh_type)
125 {
126         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
127 }
128 
129 static struct dentry *ufs_get_parent(struct dentry *child)
130 {
131         struct qstr dot_dot = QSTR_INIT("..", 2);
132         ino_t ino;
133 
134         ino = ufs_inode_by_name(d_inode(child), &dot_dot);
135         if (!ino)
136                 return ERR_PTR(-ENOENT);
137         return d_obtain_alias(ufs_iget(child->d_sb, ino));
138 }
139 
140 static const struct export_operations ufs_export_ops = {
141         .fh_to_dentry   = ufs_fh_to_dentry,
142         .fh_to_parent   = ufs_fh_to_parent,
143         .get_parent     = ufs_get_parent,
144 };
145 
146 #ifdef CONFIG_UFS_DEBUG
147 /*
148  * Print contents of ufs_super_block, useful for debugging
149  */
150 static void ufs_print_super_stuff(struct super_block *sb,
151                                   struct ufs_super_block_first *usb1,
152                                   struct ufs_super_block_second *usb2,
153                                   struct ufs_super_block_third *usb3)
154 {
155         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
156 
157         pr_debug("ufs_print_super_stuff\n");
158         pr_debug("  magic:     0x%x\n", magic);
159         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
160                 pr_debug("  fs_size:   %llu\n", (unsigned long long)
161                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
162                 pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
163                          fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
164                 pr_debug("  bsize:         %u\n",
165                          fs32_to_cpu(sb, usb1->fs_bsize));
166                 pr_debug("  fsize:         %u\n",
167                          fs32_to_cpu(sb, usb1->fs_fsize));
168                 pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
169                 pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
170                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
171                 pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
172                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
173                 pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
174                          (unsigned long long)
175                          fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
176                 pr_info("  cs_nifree(Num of free inodes): %llu\n",
177                         (unsigned long long)
178                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
179                 pr_info("  cs_nffree(Num of free frags): %llu\n",
180                         (unsigned long long)
181                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
182                 pr_info("  fs_maxsymlinklen: %u\n",
183                         fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
184         } else {
185                 pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
186                 pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
187                 pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
188                 pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
189                 pr_debug(" cgoffset:    %u\n",
190                          fs32_to_cpu(sb, usb1->fs_cgoffset));
191                 pr_debug(" ~cgmask:     0x%x\n",
192                          ~fs32_to_cpu(sb, usb1->fs_cgmask));
193                 pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
194                 pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
195                 pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
196                 pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
197                 pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
198                 pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
199                 pr_debug(" fragshift:   %u\n",
200                          fs32_to_cpu(sb, usb1->fs_fragshift));
201                 pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
202                 pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
203                 pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
204                 pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
205                 pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
206                 pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
207                 pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
208                 pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
209                 pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
210                 pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
211                 pr_debug(" fstodb:      %u\n",
212                          fs32_to_cpu(sb, usb1->fs_fsbtodb));
213                 pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
214                 pr_debug(" ndir         %u\n",
215                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
216                 pr_debug(" nifree       %u\n",
217                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
218                 pr_debug(" nbfree       %u\n",
219                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
220                 pr_debug(" nffree       %u\n",
221                          fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
222         }
223         pr_debug("\n");
224 }
225 
226 /*
227  * Print contents of ufs_cylinder_group, useful for debugging
228  */
229 static void ufs_print_cylinder_stuff(struct super_block *sb,
230                                      struct ufs_cylinder_group *cg)
231 {
232         pr_debug("\nufs_print_cylinder_stuff\n");
233         pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
234         pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
235         pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
236         pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
237         pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
238         pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
239         pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
240         pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
241         pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
242         pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
243         pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
244         pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
245         pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
246         pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
247         pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
248             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
249             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
250             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
251             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
252         pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
253         pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
254         pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
255         pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
256         pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
257         pr_debug("  clustersumoff %u\n",
258                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
259         pr_debug("  clusteroff    %u\n",
260                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
261         pr_debug("  nclusterblks  %u\n",
262                  fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
263         pr_debug("\n");
264 }
265 #else
266 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
267 #  define ufs_print_cylinder_stuff(sb, cg) /**/
268 #endif /* CONFIG_UFS_DEBUG */
269 
270 static const struct super_operations ufs_super_ops;
271 
272 void ufs_error (struct super_block * sb, const char * function,
273         const char * fmt, ...)
274 {
275         struct ufs_sb_private_info * uspi;
276         struct ufs_super_block_first * usb1;
277         struct va_format vaf;
278         va_list args;
279 
280         uspi = UFS_SB(sb)->s_uspi;
281         usb1 = ubh_get_usb_first(uspi);
282         
283         if (!sb_rdonly(sb)) {
284                 usb1->fs_clean = UFS_FSBAD;
285                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
286                 ufs_mark_sb_dirty(sb);
287                 sb->s_flags |= SB_RDONLY;
288         }
289         va_start(args, fmt);
290         vaf.fmt = fmt;
291         vaf.va = &args;
292         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
293         case UFS_MOUNT_ONERROR_PANIC:
294                 panic("panic (device %s): %s: %pV\n",
295                       sb->s_id, function, &vaf);
296 
297         case UFS_MOUNT_ONERROR_LOCK:
298         case UFS_MOUNT_ONERROR_UMOUNT:
299         case UFS_MOUNT_ONERROR_REPAIR:
300                 pr_crit("error (device %s): %s: %pV\n",
301                         sb->s_id, function, &vaf);
302         }
303         va_end(args);
304 }
305 
306 void ufs_panic (struct super_block * sb, const char * function,
307         const char * fmt, ...)
308 {
309         struct ufs_sb_private_info * uspi;
310         struct ufs_super_block_first * usb1;
311         struct va_format vaf;
312         va_list args;
313         
314         uspi = UFS_SB(sb)->s_uspi;
315         usb1 = ubh_get_usb_first(uspi);
316         
317         if (!sb_rdonly(sb)) {
318                 usb1->fs_clean = UFS_FSBAD;
319                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
320                 ufs_mark_sb_dirty(sb);
321         }
322         va_start(args, fmt);
323         vaf.fmt = fmt;
324         vaf.va = &args;
325         sb->s_flags |= SB_RDONLY;
326         pr_crit("panic (device %s): %s: %pV\n",
327                 sb->s_id, function, &vaf);
328         va_end(args);
329 }
330 
331 void ufs_warning (struct super_block * sb, const char * function,
332         const char * fmt, ...)
333 {
334         struct va_format vaf;
335         va_list args;
336 
337         va_start(args, fmt);
338         vaf.fmt = fmt;
339         vaf.va = &args;
340         pr_warn("(device %s): %s: %pV\n",
341                 sb->s_id, function, &vaf);
342         va_end(args);
343 }
344 
345 enum {
346        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
347        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
348        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
349        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
350        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
351        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
352        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
353        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
354        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
355        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
356        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
357        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
358        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
359        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
360        Opt_err
361 };
362 
363 static const match_table_t tokens = {
364         {Opt_type_old, "ufstype=old"},
365         {Opt_type_sunx86, "ufstype=sunx86"},
366         {Opt_type_sun, "ufstype=sun"},
367         {Opt_type_sunos, "ufstype=sunos"},
368         {Opt_type_44bsd, "ufstype=44bsd"},
369         {Opt_type_ufs2, "ufstype=ufs2"},
370         {Opt_type_ufs2, "ufstype=5xbsd"},
371         {Opt_type_hp, "ufstype=hp"},
372         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
373         {Opt_type_nextstep, "ufstype=nextstep"},
374         {Opt_type_openstep, "ufstype=openstep"},
375 /*end of possible ufs types */
376         {Opt_onerror_panic, "onerror=panic"},
377         {Opt_onerror_lock, "onerror=lock"},
378         {Opt_onerror_umount, "onerror=umount"},
379         {Opt_onerror_repair, "onerror=repair"},
380         {Opt_err, NULL}
381 };
382 
383 static int ufs_parse_options (char * options, unsigned * mount_options)
384 {
385         char * p;
386         
387         UFSD("ENTER\n");
388         
389         if (!options)
390                 return 1;
391 
392         while ((p = strsep(&options, ",")) != NULL) {
393                 substring_t args[MAX_OPT_ARGS];
394                 int token;
395                 if (!*p)
396                         continue;
397 
398                 token = match_token(p, tokens, args);
399                 switch (token) {
400                 case Opt_type_old:
401                         ufs_clear_opt (*mount_options, UFSTYPE);
402                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
403                         break;
404                 case Opt_type_sunx86:
405                         ufs_clear_opt (*mount_options, UFSTYPE);
406                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
407                         break;
408                 case Opt_type_sun:
409                         ufs_clear_opt (*mount_options, UFSTYPE);
410                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
411                         break;
412                 case Opt_type_sunos:
413                         ufs_clear_opt(*mount_options, UFSTYPE);
414                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
415                         break;
416                 case Opt_type_44bsd:
417                         ufs_clear_opt (*mount_options, UFSTYPE);
418                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
419                         break;
420                 case Opt_type_ufs2:
421                         ufs_clear_opt(*mount_options, UFSTYPE);
422                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
423                         break;
424                 case Opt_type_hp:
425                         ufs_clear_opt (*mount_options, UFSTYPE);
426                         ufs_set_opt (*mount_options, UFSTYPE_HP);
427                         break;
428                 case Opt_type_nextstepcd:
429                         ufs_clear_opt (*mount_options, UFSTYPE);
430                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
431                         break;
432                 case Opt_type_nextstep:
433                         ufs_clear_opt (*mount_options, UFSTYPE);
434                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
435                         break;
436                 case Opt_type_openstep:
437                         ufs_clear_opt (*mount_options, UFSTYPE);
438                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
439                         break;
440                 case Opt_onerror_panic:
441                         ufs_clear_opt (*mount_options, ONERROR);
442                         ufs_set_opt (*mount_options, ONERROR_PANIC);
443                         break;
444                 case Opt_onerror_lock:
445                         ufs_clear_opt (*mount_options, ONERROR);
446                         ufs_set_opt (*mount_options, ONERROR_LOCK);
447                         break;
448                 case Opt_onerror_umount:
449                         ufs_clear_opt (*mount_options, ONERROR);
450                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
451                         break;
452                 case Opt_onerror_repair:
453                         pr_err("Unable to do repair on error, will lock lock instead\n");
454                         ufs_clear_opt (*mount_options, ONERROR);
455                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
456                         break;
457                 default:
458                         pr_err("Invalid option: \"%s\" or missing value\n", p);
459                         return 0;
460                 }
461         }
462         return 1;
463 }
464 
465 /*
466  * Different types of UFS hold fs_cstotal in different
467  * places, and use different data structure for it.
468  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
469  */
470 static void ufs_setup_cstotal(struct super_block *sb)
471 {
472         struct ufs_sb_info *sbi = UFS_SB(sb);
473         struct ufs_sb_private_info *uspi = sbi->s_uspi;
474         struct ufs_super_block_first *usb1;
475         struct ufs_super_block_second *usb2;
476         struct ufs_super_block_third *usb3;
477         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
478 
479         UFSD("ENTER, mtype=%u\n", mtype);
480         usb1 = ubh_get_usb_first(uspi);
481         usb2 = ubh_get_usb_second(uspi);
482         usb3 = ubh_get_usb_third(uspi);
483 
484         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
485              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) ||
486             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
487                 /*we have statistic in different place, then usual*/
488                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
489                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
490                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
491                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
492         } else {
493                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
494                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
495                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
496                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
497         }
498         UFSD("EXIT\n");
499 }
500 
501 /*
502  * Read on-disk structures associated with cylinder groups
503  */
504 static int ufs_read_cylinder_structures(struct super_block *sb)
505 {
506         struct ufs_sb_info *sbi = UFS_SB(sb);
507         struct ufs_sb_private_info *uspi = sbi->s_uspi;
508         struct ufs_buffer_head * ubh;
509         unsigned char * base, * space;
510         unsigned size, blks, i;
511 
512         UFSD("ENTER\n");
513 
514         /*
515          * Read cs structures from (usually) first data block
516          * on the device. 
517          */
518         size = uspi->s_cssize;
519         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
520         base = space = kmalloc(size, GFP_NOFS);
521         if (!base)
522                 goto failed; 
523         sbi->s_csp = (struct ufs_csum *)space;
524         for (i = 0; i < blks; i += uspi->s_fpb) {
525                 size = uspi->s_bsize;
526                 if (i + uspi->s_fpb > blks)
527                         size = (blks - i) * uspi->s_fsize;
528 
529                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
530                 
531                 if (!ubh)
532                         goto failed;
533 
534                 ubh_ubhcpymem (space, ubh, size);
535 
536                 space += size;
537                 ubh_brelse (ubh);
538                 ubh = NULL;
539         }
540 
541         /*
542          * Read cylinder group (we read only first fragment from block
543          * at this time) and prepare internal data structures for cg caching.
544          */
545         sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *),
546                                    GFP_NOFS);
547         if (!sbi->s_ucg)
548                 goto failed;
549         for (i = 0; i < uspi->s_ncg; i++) 
550                 sbi->s_ucg[i] = NULL;
551         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
552                 sbi->s_ucpi[i] = NULL;
553                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
554         }
555         for (i = 0; i < uspi->s_ncg; i++) {
556                 UFSD("read cg %u\n", i);
557                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
558                         goto failed;
559                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
560                         goto failed;
561 
562                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
563         }
564         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
565                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
566                         goto failed;
567                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
568         }
569         sbi->s_cg_loaded = 0;
570         UFSD("EXIT\n");
571         return 1;
572 
573 failed:
574         kfree (base);
575         if (sbi->s_ucg) {
576                 for (i = 0; i < uspi->s_ncg; i++)
577                         if (sbi->s_ucg[i])
578                                 brelse (sbi->s_ucg[i]);
579                 kfree (sbi->s_ucg);
580                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
581                         kfree (sbi->s_ucpi[i]);
582         }
583         UFSD("EXIT (FAILED)\n");
584         return 0;
585 }
586 
587 /*
588  * Sync our internal copy of fs_cstotal with disk
589  */
590 static void ufs_put_cstotal(struct super_block *sb)
591 {
592         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
593         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
594         struct ufs_super_block_first *usb1;
595         struct ufs_super_block_second *usb2;
596         struct ufs_super_block_third *usb3;
597 
598         UFSD("ENTER\n");
599         usb1 = ubh_get_usb_first(uspi);
600         usb2 = ubh_get_usb_second(uspi);
601         usb3 = ubh_get_usb_third(uspi);
602 
603         if (mtype == UFS_MOUNT_UFSTYPE_UFS2) {
604                 /*we have statistic in different place, then usual*/
605                 usb2->fs_un.fs_u2.cs_ndir =
606                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
607                 usb2->fs_un.fs_u2.cs_nbfree =
608                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
609                 usb3->fs_un1.fs_u2.cs_nifree =
610                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
611                 usb3->fs_un1.fs_u2.cs_nffree =
612                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
613                 goto out;
614         }
615 
616         if (mtype == UFS_MOUNT_UFSTYPE_44BSD &&
617              (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) {
618                 /* store stats in both old and new places */
619                 usb2->fs_un.fs_u2.cs_ndir =
620                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
621                 usb2->fs_un.fs_u2.cs_nbfree =
622                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
623                 usb3->fs_un1.fs_u2.cs_nifree =
624                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
625                 usb3->fs_un1.fs_u2.cs_nffree =
626                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
627         }
628         usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
629         usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
630         usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
631         usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
632 out:
633         ubh_mark_buffer_dirty(USPI_UBH(uspi));
634         ufs_print_super_stuff(sb, usb1, usb2, usb3);
635         UFSD("EXIT\n");
636 }
637 
638 /**
639  * ufs_put_super_internal() - put on-disk intrenal structures
640  * @sb: pointer to super_block structure
641  * Put on-disk structures associated with cylinder groups
642  * and write them back to disk, also update cs_total on disk
643  */
644 static void ufs_put_super_internal(struct super_block *sb)
645 {
646         struct ufs_sb_info *sbi = UFS_SB(sb);
647         struct ufs_sb_private_info *uspi = sbi->s_uspi;
648         struct ufs_buffer_head * ubh;
649         unsigned char * base, * space;
650         unsigned blks, size, i;
651 
652         
653         UFSD("ENTER\n");
654 
655         ufs_put_cstotal(sb);
656         size = uspi->s_cssize;
657         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
658         base = space = (char*) sbi->s_csp;
659         for (i = 0; i < blks; i += uspi->s_fpb) {
660                 size = uspi->s_bsize;
661                 if (i + uspi->s_fpb > blks)
662                         size = (blks - i) * uspi->s_fsize;
663 
664                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
665 
666                 ubh_memcpyubh (ubh, space, size);
667                 space += size;
668                 ubh_mark_buffer_uptodate (ubh, 1);
669                 ubh_mark_buffer_dirty (ubh);
670                 ubh_brelse (ubh);
671         }
672         for (i = 0; i < sbi->s_cg_loaded; i++) {
673                 ufs_put_cylinder (sb, i);
674                 kfree (sbi->s_ucpi[i]);
675         }
676         for (; i < UFS_MAX_GROUP_LOADED; i++) 
677                 kfree (sbi->s_ucpi[i]);
678         for (i = 0; i < uspi->s_ncg; i++) 
679                 brelse (sbi->s_ucg[i]);
680         kfree (sbi->s_ucg);
681         kfree (base);
682 
683         UFSD("EXIT\n");
684 }
685 
686 static int ufs_sync_fs(struct super_block *sb, int wait)
687 {
688         struct ufs_sb_private_info * uspi;
689         struct ufs_super_block_first * usb1;
690         struct ufs_super_block_third * usb3;
691         unsigned flags;
692 
693         mutex_lock(&UFS_SB(sb)->s_lock);
694 
695         UFSD("ENTER\n");
696 
697         flags = UFS_SB(sb)->s_flags;
698         uspi = UFS_SB(sb)->s_uspi;
699         usb1 = ubh_get_usb_first(uspi);
700         usb3 = ubh_get_usb_third(uspi);
701 
702         usb1->fs_time = ufs_get_seconds(sb);
703         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
704             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
705             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
706                 ufs_set_fs_state(sb, usb1, usb3,
707                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
708         ufs_put_cstotal(sb);
709 
710         UFSD("EXIT\n");
711         mutex_unlock(&UFS_SB(sb)->s_lock);
712 
713         return 0;
714 }
715 
716 static void delayed_sync_fs(struct work_struct *work)
717 {
718         struct ufs_sb_info *sbi;
719 
720         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
721 
722         spin_lock(&sbi->work_lock);
723         sbi->work_queued = 0;
724         spin_unlock(&sbi->work_lock);
725 
726         ufs_sync_fs(sbi->sb, 1);
727 }
728 
729 void ufs_mark_sb_dirty(struct super_block *sb)
730 {
731         struct ufs_sb_info *sbi = UFS_SB(sb);
732         unsigned long delay;
733 
734         spin_lock(&sbi->work_lock);
735         if (!sbi->work_queued) {
736                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
737                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
738                 sbi->work_queued = 1;
739         }
740         spin_unlock(&sbi->work_lock);
741 }
742 
743 static void ufs_put_super(struct super_block *sb)
744 {
745         struct ufs_sb_info * sbi = UFS_SB(sb);
746 
747         UFSD("ENTER\n");
748 
749         if (!sb_rdonly(sb))
750                 ufs_put_super_internal(sb);
751         cancel_delayed_work_sync(&sbi->sync_work);
752 
753         ubh_brelse_uspi (sbi->s_uspi);
754         kfree (sbi->s_uspi);
755         kfree (sbi);
756         sb->s_fs_info = NULL;
757         UFSD("EXIT\n");
758         return;
759 }
760 
761 static u64 ufs_max_bytes(struct super_block *sb)
762 {
763         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
764         int bits = uspi->s_apbshift;
765         u64 res;
766 
767         if (bits > 21)
768                 res = ~0ULL;
769         else
770                 res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
771                         (1LL << (3*bits));
772 
773         if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
774                 return MAX_LFS_FILESIZE;
775         return res << uspi->s_bshift;
776 }
777 
778 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
779 {
780         struct ufs_sb_info * sbi;
781         struct ufs_sb_private_info * uspi;
782         struct ufs_super_block_first * usb1;
783         struct ufs_super_block_second * usb2;
784         struct ufs_super_block_third * usb3;
785         struct ufs_buffer_head * ubh;   
786         struct inode *inode;
787         unsigned block_size, super_block_size;
788         unsigned flags;
789         unsigned super_block_offset;
790         unsigned maxsymlen;
791         int ret = -EINVAL;
792 
793         uspi = NULL;
794         ubh = NULL;
795         flags = 0;
796         
797         UFSD("ENTER\n");
798 
799 #ifndef CONFIG_UFS_FS_WRITE
800         if (!sb_rdonly(sb)) {
801                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
802                 return -EROFS;
803         }
804 #endif
805                 
806         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
807         if (!sbi)
808                 goto failed_nomem;
809         sb->s_fs_info = sbi;
810         sbi->sb = sb;
811 
812         UFSD("flag %u\n", (int)(sb_rdonly(sb)));
813         
814         mutex_init(&sbi->s_lock);
815         spin_lock_init(&sbi->work_lock);
816         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
817         /*
818          * Set default mount options
819          * Parse mount options
820          */
821         sbi->s_mount_opt = 0;
822         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
823         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
824                 pr_err("wrong mount options\n");
825                 goto failed;
826         }
827         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
828                 if (!silent)
829                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
830                         "mount -t ufs -o ufstype="
831                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
832                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
833                         "default is ufstype=old\n");
834                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
835         }
836 
837         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
838         sbi->s_uspi = uspi;
839         if (!uspi)
840                 goto failed;
841         uspi->s_dirblksize = UFS_SECTOR_SIZE;
842         super_block_offset=UFS_SBLOCK;
843 
844         sb->s_maxbytes = MAX_LFS_FILESIZE;
845 
846         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
847         case UFS_MOUNT_UFSTYPE_44BSD:
848                 UFSD("ufstype=44bsd\n");
849                 uspi->s_fsize = block_size = 512;
850                 uspi->s_fmask = ~(512 - 1);
851                 uspi->s_fshift = 9;
852                 uspi->s_sbsize = super_block_size = 1536;
853                 uspi->s_sbbase = 0;
854                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
855                 break;
856         case UFS_MOUNT_UFSTYPE_UFS2:
857                 UFSD("ufstype=ufs2\n");
858                 super_block_offset=SBLOCK_UFS2;
859                 uspi->s_fsize = block_size = 512;
860                 uspi->s_fmask = ~(512 - 1);
861                 uspi->s_fshift = 9;
862                 uspi->s_sbsize = super_block_size = 1536;
863                 uspi->s_sbbase =  0;
864                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
865                 break;
866                 
867         case UFS_MOUNT_UFSTYPE_SUN:
868                 UFSD("ufstype=sun\n");
869                 uspi->s_fsize = block_size = 1024;
870                 uspi->s_fmask = ~(1024 - 1);
871                 uspi->s_fshift = 10;
872                 uspi->s_sbsize = super_block_size = 2048;
873                 uspi->s_sbbase = 0;
874                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
875                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
876                 break;
877 
878         case UFS_MOUNT_UFSTYPE_SUNOS:
879                 UFSD("ufstype=sunos\n");
880                 uspi->s_fsize = block_size = 1024;
881                 uspi->s_fmask = ~(1024 - 1);
882                 uspi->s_fshift = 10;
883                 uspi->s_sbsize = 2048;
884                 super_block_size = 2048;
885                 uspi->s_sbbase = 0;
886                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
887                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
888                 break;
889 
890         case UFS_MOUNT_UFSTYPE_SUNx86:
891                 UFSD("ufstype=sunx86\n");
892                 uspi->s_fsize = block_size = 1024;
893                 uspi->s_fmask = ~(1024 - 1);
894                 uspi->s_fshift = 10;
895                 uspi->s_sbsize = super_block_size = 2048;
896                 uspi->s_sbbase = 0;
897                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
898                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
899                 break;
900 
901         case UFS_MOUNT_UFSTYPE_OLD:
902                 UFSD("ufstype=old\n");
903                 uspi->s_fsize = block_size = 1024;
904                 uspi->s_fmask = ~(1024 - 1);
905                 uspi->s_fshift = 10;
906                 uspi->s_sbsize = super_block_size = 2048;
907                 uspi->s_sbbase = 0;
908                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
909                 if (!sb_rdonly(sb)) {
910                         if (!silent)
911                                 pr_info("ufstype=old is supported read-only\n");
912                         sb->s_flags |= SB_RDONLY;
913                 }
914                 break;
915         
916         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
917                 UFSD("ufstype=nextstep\n");
918                 uspi->s_fsize = block_size = 1024;
919                 uspi->s_fmask = ~(1024 - 1);
920                 uspi->s_fshift = 10;
921                 uspi->s_sbsize = super_block_size = 2048;
922                 uspi->s_sbbase = 0;
923                 uspi->s_dirblksize = 1024;
924                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
925                 if (!sb_rdonly(sb)) {
926                         if (!silent)
927                                 pr_info("ufstype=nextstep is supported read-only\n");
928                         sb->s_flags |= SB_RDONLY;
929                 }
930                 break;
931         
932         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
933                 UFSD("ufstype=nextstep-cd\n");
934                 uspi->s_fsize = block_size = 2048;
935                 uspi->s_fmask = ~(2048 - 1);
936                 uspi->s_fshift = 11;
937                 uspi->s_sbsize = super_block_size = 2048;
938                 uspi->s_sbbase = 0;
939                 uspi->s_dirblksize = 1024;
940                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
941                 if (!sb_rdonly(sb)) {
942                         if (!silent)
943                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
944                         sb->s_flags |= SB_RDONLY;
945                 }
946                 break;
947         
948         case UFS_MOUNT_UFSTYPE_OPENSTEP:
949                 UFSD("ufstype=openstep\n");
950                 uspi->s_fsize = block_size = 1024;
951                 uspi->s_fmask = ~(1024 - 1);
952                 uspi->s_fshift = 10;
953                 uspi->s_sbsize = super_block_size = 2048;
954                 uspi->s_sbbase = 0;
955                 uspi->s_dirblksize = 1024;
956                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
957                 if (!sb_rdonly(sb)) {
958                         if (!silent)
959                                 pr_info("ufstype=openstep is supported read-only\n");
960                         sb->s_flags |= SB_RDONLY;
961                 }
962                 break;
963         
964         case UFS_MOUNT_UFSTYPE_HP:
965                 UFSD("ufstype=hp\n");
966                 uspi->s_fsize = block_size = 1024;
967                 uspi->s_fmask = ~(1024 - 1);
968                 uspi->s_fshift = 10;
969                 uspi->s_sbsize = super_block_size = 2048;
970                 uspi->s_sbbase = 0;
971                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
972                 if (!sb_rdonly(sb)) {
973                         if (!silent)
974                                 pr_info("ufstype=hp is supported read-only\n");
975                         sb->s_flags |= SB_RDONLY;
976                 }
977                 break;
978         default:
979                 if (!silent)
980                         pr_err("unknown ufstype\n");
981                 goto failed;
982         }
983         
984 again:  
985         if (!sb_set_blocksize(sb, block_size)) {
986                 pr_err("failed to set blocksize\n");
987                 goto failed;
988         }
989 
990         /*
991          * read ufs super block from device
992          */
993 
994         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
995         
996         if (!ubh) 
997             goto failed;
998 
999         usb1 = ubh_get_usb_first(uspi);
1000         usb2 = ubh_get_usb_second(uspi);
1001         usb3 = ubh_get_usb_third(uspi);
1002 
1003         /* Sort out mod used on SunOS 4.1.3 for fs_state */
1004         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1005         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1006             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1007                 flags &= ~UFS_ST_MASK;
1008                 flags |=  UFS_ST_SUN;
1009         }
1010 
1011         if ((flags & UFS_ST_MASK) == UFS_ST_44BSD &&
1012             uspi->s_postblformat == UFS_42POSTBLFMT) {
1013                 if (!silent)
1014                         pr_err("this is not a 44bsd filesystem");
1015                 goto failed;
1016         }
1017 
1018         /*
1019          * Check ufs magic number
1020          */
1021         sbi->s_bytesex = BYTESEX_LE;
1022         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1023                 case UFS_MAGIC:
1024                 case UFS_MAGIC_BW:
1025                 case UFS2_MAGIC:
1026                 case UFS_MAGIC_LFN:
1027                 case UFS_MAGIC_FEA:
1028                 case UFS_MAGIC_4GB:
1029                         goto magic_found;
1030         }
1031         sbi->s_bytesex = BYTESEX_BE;
1032         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1033                 case UFS_MAGIC:
1034                 case UFS_MAGIC_BW:
1035                 case UFS2_MAGIC:
1036                 case UFS_MAGIC_LFN:
1037                 case UFS_MAGIC_FEA:
1038                 case UFS_MAGIC_4GB:
1039                         goto magic_found;
1040         }
1041 
1042         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1043           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1044           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1045           && uspi->s_sbbase < 256) {
1046                 ubh_brelse_uspi(uspi);
1047                 ubh = NULL;
1048                 uspi->s_sbbase += 8;
1049                 goto again;
1050         }
1051         if (!silent)
1052                 pr_err("%s(): bad magic number\n", __func__);
1053         goto failed;
1054 
1055 magic_found:
1056         /*
1057          * Check block and fragment sizes
1058          */
1059         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1060         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1061         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1062         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1063         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1064 
1065         if (!is_power_of_2(uspi->s_fsize)) {
1066                 pr_err("%s(): fragment size %u is not a power of 2\n",
1067                        __func__, uspi->s_fsize);
1068                 goto failed;
1069         }
1070         if (uspi->s_fsize < 512) {
1071                 pr_err("%s(): fragment size %u is too small\n",
1072                        __func__, uspi->s_fsize);
1073                 goto failed;
1074         }
1075         if (uspi->s_fsize > 4096) {
1076                 pr_err("%s(): fragment size %u is too large\n",
1077                        __func__, uspi->s_fsize);
1078                 goto failed;
1079         }
1080         if (!is_power_of_2(uspi->s_bsize)) {
1081                 pr_err("%s(): block size %u is not a power of 2\n",
1082                        __func__, uspi->s_bsize);
1083                 goto failed;
1084         }
1085         if (uspi->s_bsize < 4096) {
1086                 pr_err("%s(): block size %u is too small\n",
1087                        __func__, uspi->s_bsize);
1088                 goto failed;
1089         }
1090         if (uspi->s_bsize / uspi->s_fsize > 8) {
1091                 pr_err("%s(): too many fragments per block (%u)\n",
1092                        __func__, uspi->s_bsize / uspi->s_fsize);
1093                 goto failed;
1094         }
1095         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1096                 ubh_brelse_uspi(uspi);
1097                 ubh = NULL;
1098                 block_size = uspi->s_fsize;
1099                 super_block_size = uspi->s_sbsize;
1100                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1101                 goto again;
1102         }
1103 
1104         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1105         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1106 
1107         /*
1108          * Check, if file system was correctly unmounted.
1109          * If not, make it read only.
1110          */
1111         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1112           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1113           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1114             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1115           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1116           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1117                 switch(usb1->fs_clean) {
1118                 case UFS_FSCLEAN:
1119                         UFSD("fs is clean\n");
1120                         break;
1121                 case UFS_FSSTABLE:
1122                         UFSD("fs is stable\n");
1123                         break;
1124                 case UFS_FSLOG:
1125                         UFSD("fs is logging fs\n");
1126                         break;
1127                 case UFS_FSOSF1:
1128                         UFSD("fs is DEC OSF/1\n");
1129                         break;
1130                 case UFS_FSACTIVE:
1131                         pr_err("%s(): fs is active\n", __func__);
1132                         sb->s_flags |= SB_RDONLY;
1133                         break;
1134                 case UFS_FSBAD:
1135                         pr_err("%s(): fs is bad\n", __func__);
1136                         sb->s_flags |= SB_RDONLY;
1137                         break;
1138                 default:
1139                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1140                                __func__, usb1->fs_clean);
1141                         sb->s_flags |= SB_RDONLY;
1142                         break;
1143                 }
1144         } else {
1145                 pr_err("%s(): fs needs fsck\n", __func__);
1146                 sb->s_flags |= SB_RDONLY;
1147         }
1148 
1149         /*
1150          * Read ufs_super_block into internal data structures
1151          */
1152         sb->s_op = &ufs_super_ops;
1153         sb->s_export_op = &ufs_export_ops;
1154 
1155         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1156 
1157         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1158         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1159         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1160         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1161         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1162         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1163 
1164         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1165                 uspi->s_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1166                 uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1167         } else {
1168                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1169                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1170         }
1171 
1172         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1173         /* s_bsize already set */
1174         /* s_fsize already set */
1175         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1176         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1177         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1178         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1179         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1180         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1181         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1182                 uspi->s_fshift);
1183         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1184         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1185         /* s_sbsize already set */
1186         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1187         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1188         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1189         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1190         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1191         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1192         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1193         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1194 
1195         if (uspi->fs_magic == UFS2_MAGIC)
1196                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1197         else
1198                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1199 
1200         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1201         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1202         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1203         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1204         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1205         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1206         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1207         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1208         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1209         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1210         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1211         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1212         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1213         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1214 
1215         uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize,
1216                                               uspi->s_minfree, 100);
1217         if (uspi->s_minfree <= 5) {
1218                 uspi->s_time_to_space = ~0ULL;
1219                 uspi->s_space_to_time = 0;
1220                 usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
1221         } else {
1222                 uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1;
1223                 uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize,
1224                                               uspi->s_minfree - 2, 100) - 1;
1225         }
1226 
1227         /*
1228          * Compute another frequently used values
1229          */
1230         uspi->s_fpbmask = uspi->s_fpb - 1;
1231         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1232                 uspi->s_apbshift = uspi->s_bshift - 3;
1233         else
1234                 uspi->s_apbshift = uspi->s_bshift - 2;
1235 
1236         uspi->s_2apbshift = uspi->s_apbshift * 2;
1237         uspi->s_3apbshift = uspi->s_apbshift * 3;
1238         uspi->s_apb = 1 << uspi->s_apbshift;
1239         uspi->s_2apb = 1 << uspi->s_2apbshift;
1240         uspi->s_3apb = 1 << uspi->s_3apbshift;
1241         uspi->s_apbmask = uspi->s_apb - 1;
1242         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1243         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1244         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1245         uspi->s_bpf = uspi->s_fsize << 3;
1246         uspi->s_bpfshift = uspi->s_fshift + 3;
1247         uspi->s_bpfmask = uspi->s_bpf - 1;
1248         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1249             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1250                 uspi->s_maxsymlinklen =
1251                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1252 
1253         if (uspi->fs_magic == UFS2_MAGIC)
1254                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1255         else
1256                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1257         if (uspi->s_maxsymlinklen > maxsymlen) {
1258                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1259                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1260                 uspi->s_maxsymlinklen = maxsymlen;
1261         }
1262         sb->s_maxbytes = ufs_max_bytes(sb);
1263         sb->s_max_links = UFS_LINK_MAX;
1264 
1265         inode = ufs_iget(sb, UFS_ROOTINO);
1266         if (IS_ERR(inode)) {
1267                 ret = PTR_ERR(inode);
1268                 goto failed;
1269         }
1270         sb->s_root = d_make_root(inode);
1271         if (!sb->s_root) {
1272                 ret = -ENOMEM;
1273                 goto failed;
1274         }
1275 
1276         ufs_setup_cstotal(sb);
1277         /*
1278          * Read cylinder group structures
1279          */
1280         if (!sb_rdonly(sb))
1281                 if (!ufs_read_cylinder_structures(sb))
1282                         goto failed;
1283 
1284         UFSD("EXIT\n");
1285         return 0;
1286 
1287 failed:
1288         if (ubh)
1289                 ubh_brelse_uspi (uspi);
1290         kfree (uspi);
1291         kfree(sbi);
1292         sb->s_fs_info = NULL;
1293         UFSD("EXIT (FAILED)\n");
1294         return ret;
1295 
1296 failed_nomem:
1297         UFSD("EXIT (NOMEM)\n");
1298         return -ENOMEM;
1299 }
1300 
1301 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1302 {
1303         struct ufs_sb_private_info * uspi;
1304         struct ufs_super_block_first * usb1;
1305         struct ufs_super_block_third * usb3;
1306         unsigned new_mount_opt, ufstype;
1307         unsigned flags;
1308 
1309         sync_filesystem(sb);
1310         mutex_lock(&UFS_SB(sb)->s_lock);
1311         uspi = UFS_SB(sb)->s_uspi;
1312         flags = UFS_SB(sb)->s_flags;
1313         usb1 = ubh_get_usb_first(uspi);
1314         usb3 = ubh_get_usb_third(uspi);
1315         
1316         /*
1317          * Allow the "check" option to be passed as a remount option.
1318          * It is not possible to change ufstype option during remount
1319          */
1320         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1321         new_mount_opt = 0;
1322         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1323         if (!ufs_parse_options (data, &new_mount_opt)) {
1324                 mutex_unlock(&UFS_SB(sb)->s_lock);
1325                 return -EINVAL;
1326         }
1327         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1328                 new_mount_opt |= ufstype;
1329         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1330                 pr_err("ufstype can't be changed during remount\n");
1331                 mutex_unlock(&UFS_SB(sb)->s_lock);
1332                 return -EINVAL;
1333         }
1334 
1335         if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) {
1336                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1337                 mutex_unlock(&UFS_SB(sb)->s_lock);
1338                 return 0;
1339         }
1340         
1341         /*
1342          * fs was mouted as rw, remounting ro
1343          */
1344         if (*mount_flags & SB_RDONLY) {
1345                 ufs_put_super_internal(sb);
1346                 usb1->fs_time = ufs_get_seconds(sb);
1347                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1348                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1349                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1350                         ufs_set_fs_state(sb, usb1, usb3,
1351                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1352                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1353                 sb->s_flags |= SB_RDONLY;
1354         } else {
1355         /*
1356          * fs was mounted as ro, remounting rw
1357          */
1358 #ifndef CONFIG_UFS_FS_WRITE
1359                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1360                 mutex_unlock(&UFS_SB(sb)->s_lock);
1361                 return -EINVAL;
1362 #else
1363                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1364                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1365                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1366                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1367                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1368                         pr_err("this ufstype is read-only supported\n");
1369                         mutex_unlock(&UFS_SB(sb)->s_lock);
1370                         return -EINVAL;
1371                 }
1372                 if (!ufs_read_cylinder_structures(sb)) {
1373                         pr_err("failed during remounting\n");
1374                         mutex_unlock(&UFS_SB(sb)->s_lock);
1375                         return -EPERM;
1376                 }
1377                 sb->s_flags &= ~SB_RDONLY;
1378 #endif
1379         }
1380         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1381         mutex_unlock(&UFS_SB(sb)->s_lock);
1382         return 0;
1383 }
1384 
1385 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1386 {
1387         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1388         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1389         const struct match_token *tp = tokens;
1390 
1391         while (tp->token != Opt_onerror_panic && tp->token != mval)
1392                 ++tp;
1393         BUG_ON(tp->token == Opt_onerror_panic);
1394         seq_printf(seq, ",%s", tp->pattern);
1395 
1396         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1397         while (tp->token != Opt_err && tp->token != mval)
1398                 ++tp;
1399         BUG_ON(tp->token == Opt_err);
1400         seq_printf(seq, ",%s", tp->pattern);
1401 
1402         return 0;
1403 }
1404 
1405 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1406 {
1407         struct super_block *sb = dentry->d_sb;
1408         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1409         unsigned  flags = UFS_SB(sb)->s_flags;
1410         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1411 
1412         mutex_lock(&UFS_SB(sb)->s_lock);
1413         
1414         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1415                 buf->f_type = UFS2_MAGIC;
1416         else
1417                 buf->f_type = UFS_MAGIC;
1418 
1419         buf->f_blocks = uspi->s_dsize;
1420         buf->f_bfree = ufs_freefrags(uspi);
1421         buf->f_ffree = uspi->cs_total.cs_nifree;
1422         buf->f_bsize = sb->s_blocksize;
1423         buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks)
1424                 ? (buf->f_bfree - uspi->s_root_blocks) : 0;
1425         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1426         buf->f_namelen = UFS_MAXNAMLEN;
1427         buf->f_fsid.val[0] = (u32)id;
1428         buf->f_fsid.val[1] = (u32)(id >> 32);
1429 
1430         mutex_unlock(&UFS_SB(sb)->s_lock);
1431 
1432         return 0;
1433 }
1434 
1435 static struct kmem_cache * ufs_inode_cachep;
1436 
1437 static struct inode *ufs_alloc_inode(struct super_block *sb)
1438 {
1439         struct ufs_inode_info *ei;
1440 
1441         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1442         if (!ei)
1443                 return NULL;
1444 
1445         inode_set_iversion(&ei->vfs_inode, 1);
1446         seqlock_init(&ei->meta_lock);
1447         mutex_init(&ei->truncate_mutex);
1448         return &ei->vfs_inode;
1449 }
1450 
1451 static void ufs_free_in_core_inode(struct inode *inode)
1452 {
1453         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1454 }
1455 
1456 static void init_once(void *foo)
1457 {
1458         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1459 
1460         inode_init_once(&ei->vfs_inode);
1461 }
1462 
1463 static int __init init_inodecache(void)
1464 {
1465         ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
1466                                 sizeof(struct ufs_inode_info), 0,
1467                                 (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
1468                                         SLAB_ACCOUNT),
1469                                 offsetof(struct ufs_inode_info, i_u1.i_symlink),
1470                                 sizeof_field(struct ufs_inode_info,
1471                                         i_u1.i_symlink),
1472                                 init_once);
1473         if (ufs_inode_cachep == NULL)
1474                 return -ENOMEM;
1475         return 0;
1476 }
1477 
1478 static void destroy_inodecache(void)
1479 {
1480         /*
1481          * Make sure all delayed rcu free inodes are flushed before we
1482          * destroy cache.
1483          */
1484         rcu_barrier();
1485         kmem_cache_destroy(ufs_inode_cachep);
1486 }
1487 
1488 static const struct super_operations ufs_super_ops = {
1489         .alloc_inode    = ufs_alloc_inode,
1490         .free_inode     = ufs_free_in_core_inode,
1491         .write_inode    = ufs_write_inode,
1492         .evict_inode    = ufs_evict_inode,
1493         .put_super      = ufs_put_super,
1494         .sync_fs        = ufs_sync_fs,
1495         .statfs         = ufs_statfs,
1496         .remount_fs     = ufs_remount,
1497         .show_options   = ufs_show_options,
1498 };
1499 
1500 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1501         int flags, const char *dev_name, void *data)
1502 {
1503         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1504 }
1505 
1506 static struct file_system_type ufs_fs_type = {
1507         .owner          = THIS_MODULE,
1508         .name           = "ufs",
1509         .mount          = ufs_mount,
1510         .kill_sb        = kill_block_super,
1511         .fs_flags       = FS_REQUIRES_DEV,
1512 };
1513 MODULE_ALIAS_FS("ufs");
1514 
1515 static int __init init_ufs_fs(void)
1516 {
1517         int err = init_inodecache();
1518         if (err)
1519                 goto out1;
1520         err = register_filesystem(&ufs_fs_type);
1521         if (err)
1522                 goto out;
1523         return 0;
1524 out:
1525         destroy_inodecache();
1526 out1:
1527         return err;
1528 }
1529 
1530 static void __exit exit_ufs_fs(void)
1531 {
1532         unregister_filesystem(&ufs_fs_type);
1533         destroy_inodecache();
1534 }
1535 
1536 module_init(init_ufs_fs)
1537 module_exit(exit_ufs_fs)
1538 MODULE_LICENSE("GPL");
1539 

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