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

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