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TOMOYO Linux Cross Reference
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 
 69 #include <linux/exportfs.h>
 70 #include <linux/module.h>
 71 #include <linux/bitops.h>
 72 
 73 #include <stdarg.h>
 74 
 75 #include <asm/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/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 void lock_ufs(struct super_block *sb)
 98 {
 99 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
100         struct ufs_sb_info *sbi = UFS_SB(sb);
101 
102         mutex_lock(&sbi->mutex);
103         sbi->mutex_owner = current;
104 #endif
105 }
106 
107 void unlock_ufs(struct super_block *sb)
108 {
109 #if defined(CONFIG_SMP) || defined (CONFIG_PREEMPT)
110         struct ufs_sb_info *sbi = UFS_SB(sb);
111 
112         sbi->mutex_owner = NULL;
113         mutex_unlock(&sbi->mutex);
114 #endif
115 }
116 
117 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
118 {
119         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
120         struct inode *inode;
121 
122         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
123                 return ERR_PTR(-ESTALE);
124 
125         inode = ufs_iget(sb, ino);
126         if (IS_ERR(inode))
127                 return ERR_CAST(inode);
128         if (generation && inode->i_generation != generation) {
129                 iput(inode);
130                 return ERR_PTR(-ESTALE);
131         }
132         return inode;
133 }
134 
135 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
136                                        int fh_len, int fh_type)
137 {
138         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
139 }
140 
141 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
142                                        int fh_len, int fh_type)
143 {
144         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
145 }
146 
147 static struct dentry *ufs_get_parent(struct dentry *child)
148 {
149         struct qstr dot_dot = QSTR_INIT("..", 2);
150         ino_t ino;
151 
152         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
153         if (!ino)
154                 return ERR_PTR(-ENOENT);
155         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
156 }
157 
158 static const struct export_operations ufs_export_ops = {
159         .fh_to_dentry   = ufs_fh_to_dentry,
160         .fh_to_parent   = ufs_fh_to_parent,
161         .get_parent     = ufs_get_parent,
162 };
163 
164 #ifdef CONFIG_UFS_DEBUG
165 /*
166  * Print contents of ufs_super_block, useful for debugging
167  */
168 static void ufs_print_super_stuff(struct super_block *sb,
169                                   struct ufs_super_block_first *usb1,
170                                   struct ufs_super_block_second *usb2,
171                                   struct ufs_super_block_third *usb3)
172 {
173         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
174 
175         printk("ufs_print_super_stuff\n");
176         printk("  magic:     0x%x\n", magic);
177         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
178                 printk("  fs_size:   %llu\n", (unsigned long long)
179                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
180                 printk("  fs_dsize:  %llu\n", (unsigned long long)
181                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
182                 printk("  bsize:         %u\n",
183                        fs32_to_cpu(sb, usb1->fs_bsize));
184                 printk("  fsize:         %u\n",
185                        fs32_to_cpu(sb, usb1->fs_fsize));
186                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
187                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
188                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
189                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
190                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
191                 printk("  cs_nbfree(No of free blocks):  %llu\n",
192                        (unsigned long long)
193                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
194                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
195                        (unsigned long long)
196                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
197                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
198                        (unsigned long long)
199                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
200                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
201                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
202         } else {
203                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
204                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
205                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
206                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
207                 printk(" cgoffset:    %u\n",
208                        fs32_to_cpu(sb, usb1->fs_cgoffset));
209                 printk(" ~cgmask:     0x%x\n",
210                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
211                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
212                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
213                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
214                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
215                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
216                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
217                 printk(" fragshift:   %u\n",
218                        fs32_to_cpu(sb, usb1->fs_fragshift));
219                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
220                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
221                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
222                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
223                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
224                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
225                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
226                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
227                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
228                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
229                 printk(" fstodb:      %u\n",
230                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
231                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
232                 printk(" ndir         %u\n",
233                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
234                 printk(" nifree       %u\n",
235                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
236                 printk(" nbfree       %u\n",
237                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
238                 printk(" nffree       %u\n",
239                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
240         }
241         printk("\n");
242 }
243 
244 /*
245  * Print contents of ufs_cylinder_group, useful for debugging
246  */
247 static void ufs_print_cylinder_stuff(struct super_block *sb,
248                                      struct ufs_cylinder_group *cg)
249 {
250         printk("\nufs_print_cylinder_stuff\n");
251         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
252         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
253         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
254         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
255         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
256         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
257         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
258         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
259         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
260         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
261         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
262         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
263         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
264         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
265         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
266             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
267             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
268             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
269             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
270         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
271         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
272         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
273         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
274         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
275         printk("  clustersumoff %u\n",
276                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
277         printk("  clusteroff    %u\n",
278                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
279         printk("  nclusterblks  %u\n",
280                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
281         printk("\n");
282 }
283 #else
284 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
285 #  define ufs_print_cylinder_stuff(sb, cg) /**/
286 #endif /* CONFIG_UFS_DEBUG */
287 
288 static const struct super_operations ufs_super_ops;
289 
290 static char error_buf[1024];
291 
292 void ufs_error (struct super_block * sb, const char * function,
293         const char * fmt, ...)
294 {
295         struct ufs_sb_private_info * uspi;
296         struct ufs_super_block_first * usb1;
297         va_list args;
298 
299         uspi = UFS_SB(sb)->s_uspi;
300         usb1 = ubh_get_usb_first(uspi);
301         
302         if (!(sb->s_flags & MS_RDONLY)) {
303                 usb1->fs_clean = UFS_FSBAD;
304                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
305                 ufs_mark_sb_dirty(sb);
306                 sb->s_flags |= MS_RDONLY;
307         }
308         va_start (args, fmt);
309         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
310         va_end (args);
311         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
312         case UFS_MOUNT_ONERROR_PANIC:
313                 panic ("UFS-fs panic (device %s): %s: %s\n", 
314                         sb->s_id, function, error_buf);
315 
316         case UFS_MOUNT_ONERROR_LOCK:
317         case UFS_MOUNT_ONERROR_UMOUNT:
318         case UFS_MOUNT_ONERROR_REPAIR:
319                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
320                         sb->s_id, function, error_buf);
321         }               
322 }
323 
324 void ufs_panic (struct super_block * sb, const char * function,
325         const char * fmt, ...)
326 {
327         struct ufs_sb_private_info * uspi;
328         struct ufs_super_block_first * usb1;
329         va_list args;
330         
331         uspi = UFS_SB(sb)->s_uspi;
332         usb1 = ubh_get_usb_first(uspi);
333         
334         if (!(sb->s_flags & MS_RDONLY)) {
335                 usb1->fs_clean = UFS_FSBAD;
336                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
337                 ufs_mark_sb_dirty(sb);
338         }
339         va_start (args, fmt);
340         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
341         va_end (args);
342         sb->s_flags |= MS_RDONLY;
343         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
344                 sb->s_id, function, error_buf);
345 }
346 
347 void ufs_warning (struct super_block * sb, const char * function,
348         const char * fmt, ...)
349 {
350         va_list args;
351 
352         va_start (args, fmt);
353         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
354         va_end (args);
355         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
356                 sb->s_id, function, error_buf);
357 }
358 
359 enum {
360        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
361        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
362        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
363        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
364        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
365        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
366        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
367        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
368        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
369        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
370        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
371        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
372        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
373        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
374        Opt_err
375 };
376 
377 static const match_table_t tokens = {
378         {Opt_type_old, "ufstype=old"},
379         {Opt_type_sunx86, "ufstype=sunx86"},
380         {Opt_type_sun, "ufstype=sun"},
381         {Opt_type_sunos, "ufstype=sunos"},
382         {Opt_type_44bsd, "ufstype=44bsd"},
383         {Opt_type_ufs2, "ufstype=ufs2"},
384         {Opt_type_ufs2, "ufstype=5xbsd"},
385         {Opt_type_hp, "ufstype=hp"},
386         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
387         {Opt_type_nextstep, "ufstype=nextstep"},
388         {Opt_type_openstep, "ufstype=openstep"},
389 /*end of possible ufs types */
390         {Opt_onerror_panic, "onerror=panic"},
391         {Opt_onerror_lock, "onerror=lock"},
392         {Opt_onerror_umount, "onerror=umount"},
393         {Opt_onerror_repair, "onerror=repair"},
394         {Opt_err, NULL}
395 };
396 
397 static int ufs_parse_options (char * options, unsigned * mount_options)
398 {
399         char * p;
400         
401         UFSD("ENTER\n");
402         
403         if (!options)
404                 return 1;
405 
406         while ((p = strsep(&options, ",")) != NULL) {
407                 substring_t args[MAX_OPT_ARGS];
408                 int token;
409                 if (!*p)
410                         continue;
411 
412                 token = match_token(p, tokens, args);
413                 switch (token) {
414                 case Opt_type_old:
415                         ufs_clear_opt (*mount_options, UFSTYPE);
416                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
417                         break;
418                 case Opt_type_sunx86:
419                         ufs_clear_opt (*mount_options, UFSTYPE);
420                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
421                         break;
422                 case Opt_type_sun:
423                         ufs_clear_opt (*mount_options, UFSTYPE);
424                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
425                         break;
426                 case Opt_type_sunos:
427                         ufs_clear_opt(*mount_options, UFSTYPE);
428                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
429                         break;
430                 case Opt_type_44bsd:
431                         ufs_clear_opt (*mount_options, UFSTYPE);
432                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
433                         break;
434                 case Opt_type_ufs2:
435                         ufs_clear_opt(*mount_options, UFSTYPE);
436                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
437                         break;
438                 case Opt_type_hp:
439                         ufs_clear_opt (*mount_options, UFSTYPE);
440                         ufs_set_opt (*mount_options, UFSTYPE_HP);
441                         break;
442                 case Opt_type_nextstepcd:
443                         ufs_clear_opt (*mount_options, UFSTYPE);
444                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
445                         break;
446                 case Opt_type_nextstep:
447                         ufs_clear_opt (*mount_options, UFSTYPE);
448                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
449                         break;
450                 case Opt_type_openstep:
451                         ufs_clear_opt (*mount_options, UFSTYPE);
452                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
453                         break;
454                 case Opt_onerror_panic:
455                         ufs_clear_opt (*mount_options, ONERROR);
456                         ufs_set_opt (*mount_options, ONERROR_PANIC);
457                         break;
458                 case Opt_onerror_lock:
459                         ufs_clear_opt (*mount_options, ONERROR);
460                         ufs_set_opt (*mount_options, ONERROR_LOCK);
461                         break;
462                 case Opt_onerror_umount:
463                         ufs_clear_opt (*mount_options, ONERROR);
464                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
465                         break;
466                 case Opt_onerror_repair:
467                         printk("UFS-fs: Unable to do repair on error, "
468                                 "will lock lock instead\n");
469                         ufs_clear_opt (*mount_options, ONERROR);
470                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
471                         break;
472                 default:
473                         printk("UFS-fs: Invalid option: \"%s\" "
474                                         "or missing value\n", p);
475                         return 0;
476                 }
477         }
478         return 1;
479 }
480 
481 /*
482  * Different types of UFS hold fs_cstotal in different
483  * places, and use different data structure for it.
484  * To make things simpler we just copy fs_cstotal to ufs_sb_private_info
485  */
486 static void ufs_setup_cstotal(struct super_block *sb)
487 {
488         struct ufs_sb_info *sbi = UFS_SB(sb);
489         struct ufs_sb_private_info *uspi = sbi->s_uspi;
490         struct ufs_super_block_first *usb1;
491         struct ufs_super_block_second *usb2;
492         struct ufs_super_block_third *usb3;
493         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
494 
495         UFSD("ENTER, mtype=%u\n", mtype);
496         usb1 = ubh_get_usb_first(uspi);
497         usb2 = ubh_get_usb_second(uspi);
498         usb3 = ubh_get_usb_third(uspi);
499 
500         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
501              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
502             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
503                 /*we have statistic in different place, then usual*/
504                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
505                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
506                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
507                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
508         } else {
509                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
510                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
511                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
512                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
513         }
514         UFSD("EXIT\n");
515 }
516 
517 /*
518  * Read on-disk structures associated with cylinder groups
519  */
520 static int ufs_read_cylinder_structures(struct super_block *sb)
521 {
522         struct ufs_sb_info *sbi = UFS_SB(sb);
523         struct ufs_sb_private_info *uspi = sbi->s_uspi;
524         struct ufs_buffer_head * ubh;
525         unsigned char * base, * space;
526         unsigned size, blks, i;
527         struct ufs_super_block_third *usb3;
528 
529         UFSD("ENTER\n");
530 
531         usb3 = ubh_get_usb_third(uspi);
532         /*
533          * Read cs structures from (usually) first data block
534          * on the device. 
535          */
536         size = uspi->s_cssize;
537         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
538         base = space = kmalloc(size, GFP_NOFS);
539         if (!base)
540                 goto failed; 
541         sbi->s_csp = (struct ufs_csum *)space;
542         for (i = 0; i < blks; i += uspi->s_fpb) {
543                 size = uspi->s_bsize;
544                 if (i + uspi->s_fpb > blks)
545                         size = (blks - i) * uspi->s_fsize;
546 
547                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
548                 
549                 if (!ubh)
550                         goto failed;
551 
552                 ubh_ubhcpymem (space, ubh, size);
553 
554                 space += size;
555                 ubh_brelse (ubh);
556                 ubh = NULL;
557         }
558 
559         /*
560          * Read cylinder group (we read only first fragment from block
561          * at this time) and prepare internal data structures for cg caching.
562          */
563         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_NOFS)))
564                 goto failed;
565         for (i = 0; i < uspi->s_ncg; i++) 
566                 sbi->s_ucg[i] = NULL;
567         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
568                 sbi->s_ucpi[i] = NULL;
569                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
570         }
571         for (i = 0; i < uspi->s_ncg; i++) {
572                 UFSD("read cg %u\n", i);
573                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
574                         goto failed;
575                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
576                         goto failed;
577 
578                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
579         }
580         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
581                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS)))
582                         goto failed;
583                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
584         }
585         sbi->s_cg_loaded = 0;
586         UFSD("EXIT\n");
587         return 1;
588 
589 failed:
590         kfree (base);
591         if (sbi->s_ucg) {
592                 for (i = 0; i < uspi->s_ncg; i++)
593                         if (sbi->s_ucg[i])
594                                 brelse (sbi->s_ucg[i]);
595                 kfree (sbi->s_ucg);
596                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
597                         kfree (sbi->s_ucpi[i]);
598         }
599         UFSD("EXIT (FAILED)\n");
600         return 0;
601 }
602 
603 /*
604  * Sync our internal copy of fs_cstotal with disk
605  */
606 static void ufs_put_cstotal(struct super_block *sb)
607 {
608         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
609         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
610         struct ufs_super_block_first *usb1;
611         struct ufs_super_block_second *usb2;
612         struct ufs_super_block_third *usb3;
613 
614         UFSD("ENTER\n");
615         usb1 = ubh_get_usb_first(uspi);
616         usb2 = ubh_get_usb_second(uspi);
617         usb3 = ubh_get_usb_third(uspi);
618 
619         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
620              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
621             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
622                 /*we have statistic in different place, then usual*/
623                 usb2->fs_un.fs_u2.cs_ndir =
624                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
625                 usb2->fs_un.fs_u2.cs_nbfree =
626                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
627                 usb3->fs_un1.fs_u2.cs_nifree =
628                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
629                 usb3->fs_un1.fs_u2.cs_nffree =
630                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
631         } else {
632                 usb1->fs_cstotal.cs_ndir =
633                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
634                 usb1->fs_cstotal.cs_nbfree =
635                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
636                 usb1->fs_cstotal.cs_nifree =
637                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
638                 usb1->fs_cstotal.cs_nffree =
639                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
640         }
641         ubh_mark_buffer_dirty(USPI_UBH(uspi));
642         ufs_print_super_stuff(sb, usb1, usb2, usb3);
643         UFSD("EXIT\n");
644 }
645 
646 /**
647  * ufs_put_super_internal() - put on-disk intrenal structures
648  * @sb: pointer to super_block structure
649  * Put on-disk structures associated with cylinder groups
650  * and write them back to disk, also update cs_total on disk
651  */
652 static void ufs_put_super_internal(struct super_block *sb)
653 {
654         struct ufs_sb_info *sbi = UFS_SB(sb);
655         struct ufs_sb_private_info *uspi = sbi->s_uspi;
656         struct ufs_buffer_head * ubh;
657         unsigned char * base, * space;
658         unsigned blks, size, i;
659 
660         
661         UFSD("ENTER\n");
662 
663         ufs_put_cstotal(sb);
664         size = uspi->s_cssize;
665         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
666         base = space = (char*) sbi->s_csp;
667         for (i = 0; i < blks; i += uspi->s_fpb) {
668                 size = uspi->s_bsize;
669                 if (i + uspi->s_fpb > blks)
670                         size = (blks - i) * uspi->s_fsize;
671 
672                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
673 
674                 ubh_memcpyubh (ubh, space, size);
675                 space += size;
676                 ubh_mark_buffer_uptodate (ubh, 1);
677                 ubh_mark_buffer_dirty (ubh);
678                 ubh_brelse (ubh);
679         }
680         for (i = 0; i < sbi->s_cg_loaded; i++) {
681                 ufs_put_cylinder (sb, i);
682                 kfree (sbi->s_ucpi[i]);
683         }
684         for (; i < UFS_MAX_GROUP_LOADED; i++) 
685                 kfree (sbi->s_ucpi[i]);
686         for (i = 0; i < uspi->s_ncg; i++) 
687                 brelse (sbi->s_ucg[i]);
688         kfree (sbi->s_ucg);
689         kfree (base);
690 
691         UFSD("EXIT\n");
692 }
693 
694 static int ufs_sync_fs(struct super_block *sb, int wait)
695 {
696         struct ufs_sb_private_info * uspi;
697         struct ufs_super_block_first * usb1;
698         struct ufs_super_block_third * usb3;
699         unsigned flags;
700 
701         lock_ufs(sb);
702         mutex_lock(&UFS_SB(sb)->s_lock);
703 
704         UFSD("ENTER\n");
705 
706         flags = UFS_SB(sb)->s_flags;
707         uspi = UFS_SB(sb)->s_uspi;
708         usb1 = ubh_get_usb_first(uspi);
709         usb3 = ubh_get_usb_third(uspi);
710 
711         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
712         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
713             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
714             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
715                 ufs_set_fs_state(sb, usb1, usb3,
716                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
717         ufs_put_cstotal(sb);
718 
719         UFSD("EXIT\n");
720         mutex_unlock(&UFS_SB(sb)->s_lock);
721         unlock_ufs(sb);
722 
723         return 0;
724 }
725 
726 static void delayed_sync_fs(struct work_struct *work)
727 {
728         struct ufs_sb_info *sbi;
729 
730         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
731 
732         spin_lock(&sbi->work_lock);
733         sbi->work_queued = 0;
734         spin_unlock(&sbi->work_lock);
735 
736         ufs_sync_fs(sbi->sb, 1);
737 }
738 
739 void ufs_mark_sb_dirty(struct super_block *sb)
740 {
741         struct ufs_sb_info *sbi = UFS_SB(sb);
742         unsigned long delay;
743 
744         spin_lock(&sbi->work_lock);
745         if (!sbi->work_queued) {
746                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
747                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
748                 sbi->work_queued = 1;
749         }
750         spin_unlock(&sbi->work_lock);
751 }
752 
753 static void ufs_put_super(struct super_block *sb)
754 {
755         struct ufs_sb_info * sbi = UFS_SB(sb);
756 
757         UFSD("ENTER\n");
758 
759         if (!(sb->s_flags & MS_RDONLY))
760                 ufs_put_super_internal(sb);
761         cancel_delayed_work_sync(&sbi->sync_work);
762 
763         ubh_brelse_uspi (sbi->s_uspi);
764         kfree (sbi->s_uspi);
765         kfree (sbi);
766         sb->s_fs_info = NULL;
767         UFSD("EXIT\n");
768         return;
769 }
770 
771 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
772 {
773         struct ufs_sb_info * sbi;
774         struct ufs_sb_private_info * uspi;
775         struct ufs_super_block_first * usb1;
776         struct ufs_super_block_second * usb2;
777         struct ufs_super_block_third * usb3;
778         struct ufs_buffer_head * ubh;   
779         struct inode *inode;
780         unsigned block_size, super_block_size;
781         unsigned flags;
782         unsigned super_block_offset;
783         unsigned maxsymlen;
784         int ret = -EINVAL;
785 
786         uspi = NULL;
787         ubh = NULL;
788         flags = 0;
789         
790         UFSD("ENTER\n");
791                 
792         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
793         if (!sbi)
794                 goto failed_nomem;
795         sb->s_fs_info = sbi;
796         sbi->sb = sb;
797 
798         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
799         
800 #ifndef CONFIG_UFS_FS_WRITE
801         if (!(sb->s_flags & MS_RDONLY)) {
802                 printk("ufs was compiled with read-only support, "
803                 "can't be mounted as read-write\n");
804                 goto failed;
805         }
806 #endif
807         mutex_init(&sbi->mutex);
808         mutex_init(&sbi->s_lock);
809         spin_lock_init(&sbi->work_lock);
810         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
811         /*
812          * Set default mount options
813          * Parse mount options
814          */
815         sbi->s_mount_opt = 0;
816         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
817         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
818                 printk("wrong mount options\n");
819                 goto failed;
820         }
821         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
822                 if (!silent)
823                         printk("You didn't specify the type of your ufs filesystem\n\n"
824                         "mount -t ufs -o ufstype="
825                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
826                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
827                         "default is ufstype=old\n");
828                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
829         }
830 
831         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
832         sbi->s_uspi = uspi;
833         if (!uspi)
834                 goto failed;
835         uspi->s_dirblksize = UFS_SECTOR_SIZE;
836         super_block_offset=UFS_SBLOCK;
837 
838         /* Keep 2Gig file limit. Some UFS variants need to override 
839            this but as I don't know which I'll let those in the know loosen
840            the rules */
841         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
842         case UFS_MOUNT_UFSTYPE_44BSD:
843                 UFSD("ufstype=44bsd\n");
844                 uspi->s_fsize = block_size = 512;
845                 uspi->s_fmask = ~(512 - 1);
846                 uspi->s_fshift = 9;
847                 uspi->s_sbsize = super_block_size = 1536;
848                 uspi->s_sbbase = 0;
849                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
850                 break;
851         case UFS_MOUNT_UFSTYPE_UFS2:
852                 UFSD("ufstype=ufs2\n");
853                 super_block_offset=SBLOCK_UFS2;
854                 uspi->s_fsize = block_size = 512;
855                 uspi->s_fmask = ~(512 - 1);
856                 uspi->s_fshift = 9;
857                 uspi->s_sbsize = super_block_size = 1536;
858                 uspi->s_sbbase =  0;
859                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
860                 break;
861                 
862         case UFS_MOUNT_UFSTYPE_SUN:
863                 UFSD("ufstype=sun\n");
864                 uspi->s_fsize = block_size = 1024;
865                 uspi->s_fmask = ~(1024 - 1);
866                 uspi->s_fshift = 10;
867                 uspi->s_sbsize = super_block_size = 2048;
868                 uspi->s_sbbase = 0;
869                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
870                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
871                 break;
872 
873         case UFS_MOUNT_UFSTYPE_SUNOS:
874                 UFSD(("ufstype=sunos\n"))
875                 uspi->s_fsize = block_size = 1024;
876                 uspi->s_fmask = ~(1024 - 1);
877                 uspi->s_fshift = 10;
878                 uspi->s_sbsize = 2048;
879                 super_block_size = 2048;
880                 uspi->s_sbbase = 0;
881                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
882                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
883                 break;
884 
885         case UFS_MOUNT_UFSTYPE_SUNx86:
886                 UFSD("ufstype=sunx86\n");
887                 uspi->s_fsize = block_size = 1024;
888                 uspi->s_fmask = ~(1024 - 1);
889                 uspi->s_fshift = 10;
890                 uspi->s_sbsize = super_block_size = 2048;
891                 uspi->s_sbbase = 0;
892                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
893                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
894                 break;
895 
896         case UFS_MOUNT_UFSTYPE_OLD:
897                 UFSD("ufstype=old\n");
898                 uspi->s_fsize = block_size = 1024;
899                 uspi->s_fmask = ~(1024 - 1);
900                 uspi->s_fshift = 10;
901                 uspi->s_sbsize = super_block_size = 2048;
902                 uspi->s_sbbase = 0;
903                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
904                 if (!(sb->s_flags & MS_RDONLY)) {
905                         if (!silent)
906                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
907                         sb->s_flags |= MS_RDONLY;
908                 }
909                 break;
910         
911         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
912                 UFSD("ufstype=nextstep\n");
913                 uspi->s_fsize = block_size = 1024;
914                 uspi->s_fmask = ~(1024 - 1);
915                 uspi->s_fshift = 10;
916                 uspi->s_sbsize = super_block_size = 2048;
917                 uspi->s_sbbase = 0;
918                 uspi->s_dirblksize = 1024;
919                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
920                 if (!(sb->s_flags & MS_RDONLY)) {
921                         if (!silent)
922                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
923                         sb->s_flags |= MS_RDONLY;
924                 }
925                 break;
926         
927         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
928                 UFSD("ufstype=nextstep-cd\n");
929                 uspi->s_fsize = block_size = 2048;
930                 uspi->s_fmask = ~(2048 - 1);
931                 uspi->s_fshift = 11;
932                 uspi->s_sbsize = super_block_size = 2048;
933                 uspi->s_sbbase = 0;
934                 uspi->s_dirblksize = 1024;
935                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
936                 if (!(sb->s_flags & MS_RDONLY)) {
937                         if (!silent)
938                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
939                         sb->s_flags |= MS_RDONLY;
940                 }
941                 break;
942         
943         case UFS_MOUNT_UFSTYPE_OPENSTEP:
944                 UFSD("ufstype=openstep\n");
945                 uspi->s_fsize = block_size = 1024;
946                 uspi->s_fmask = ~(1024 - 1);
947                 uspi->s_fshift = 10;
948                 uspi->s_sbsize = super_block_size = 2048;
949                 uspi->s_sbbase = 0;
950                 uspi->s_dirblksize = 1024;
951                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
952                 if (!(sb->s_flags & MS_RDONLY)) {
953                         if (!silent)
954                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
955                         sb->s_flags |= MS_RDONLY;
956                 }
957                 break;
958         
959         case UFS_MOUNT_UFSTYPE_HP:
960                 UFSD("ufstype=hp\n");
961                 uspi->s_fsize = block_size = 1024;
962                 uspi->s_fmask = ~(1024 - 1);
963                 uspi->s_fshift = 10;
964                 uspi->s_sbsize = super_block_size = 2048;
965                 uspi->s_sbbase = 0;
966                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
967                 if (!(sb->s_flags & MS_RDONLY)) {
968                         if (!silent)
969                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
970                         sb->s_flags |= MS_RDONLY;
971                 }
972                 break;
973         default:
974                 if (!silent)
975                         printk("unknown ufstype\n");
976                 goto failed;
977         }
978         
979 again:  
980         if (!sb_set_blocksize(sb, block_size)) {
981                 printk(KERN_ERR "UFS: failed to set blocksize\n");
982                 goto failed;
983         }
984 
985         /*
986          * read ufs super block from device
987          */
988 
989         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
990         
991         if (!ubh) 
992             goto failed;
993 
994         usb1 = ubh_get_usb_first(uspi);
995         usb2 = ubh_get_usb_second(uspi);
996         usb3 = ubh_get_usb_third(uspi);
997 
998         /* Sort out mod used on SunOS 4.1.3 for fs_state */
999         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
1000         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
1001             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
1002                 flags &= ~UFS_ST_MASK;
1003                 flags |=  UFS_ST_SUN;
1004         }
1005 
1006         /*
1007          * Check ufs magic number
1008          */
1009         sbi->s_bytesex = BYTESEX_LE;
1010         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1011                 case UFS_MAGIC:
1012                 case UFS_MAGIC_BW:
1013                 case UFS2_MAGIC:
1014                 case UFS_MAGIC_LFN:
1015                 case UFS_MAGIC_FEA:
1016                 case UFS_MAGIC_4GB:
1017                         goto magic_found;
1018         }
1019         sbi->s_bytesex = BYTESEX_BE;
1020         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
1021                 case UFS_MAGIC:
1022                 case UFS_MAGIC_BW:
1023                 case UFS2_MAGIC:
1024                 case UFS_MAGIC_LFN:
1025                 case UFS_MAGIC_FEA:
1026                 case UFS_MAGIC_4GB:
1027                         goto magic_found;
1028         }
1029 
1030         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1031           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1032           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1033           && uspi->s_sbbase < 256) {
1034                 ubh_brelse_uspi(uspi);
1035                 ubh = NULL;
1036                 uspi->s_sbbase += 8;
1037                 goto again;
1038         }
1039         if (!silent)
1040                 printk("ufs_read_super: bad magic number\n");
1041         goto failed;
1042 
1043 magic_found:
1044         /*
1045          * Check block and fragment sizes
1046          */
1047         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1048         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1049         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1050         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1051         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1052 
1053         if (!is_power_of_2(uspi->s_fsize)) {
1054                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
1055                         uspi->s_fsize);
1056                         goto failed;
1057         }
1058         if (uspi->s_fsize < 512) {
1059                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
1060                         uspi->s_fsize);
1061                 goto failed;
1062         }
1063         if (uspi->s_fsize > 4096) {
1064                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
1065                         uspi->s_fsize);
1066                 goto failed;
1067         }
1068         if (!is_power_of_2(uspi->s_bsize)) {
1069                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
1070                         uspi->s_bsize);
1071                 goto failed;
1072         }
1073         if (uspi->s_bsize < 4096) {
1074                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
1075                         uspi->s_bsize);
1076                 goto failed;
1077         }
1078         if (uspi->s_bsize / uspi->s_fsize > 8) {
1079                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
1080                         uspi->s_bsize / uspi->s_fsize);
1081                 goto failed;
1082         }
1083         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1084                 ubh_brelse_uspi(uspi);
1085                 ubh = NULL;
1086                 block_size = uspi->s_fsize;
1087                 super_block_size = uspi->s_sbsize;
1088                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1089                 goto again;
1090         }
1091 
1092         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1093         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1094 
1095         /*
1096          * Check, if file system was correctly unmounted.
1097          * If not, make it read only.
1098          */
1099         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1100           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1101           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1102             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1103           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1104           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1105                 switch(usb1->fs_clean) {
1106                 case UFS_FSCLEAN:
1107                         UFSD("fs is clean\n");
1108                         break;
1109                 case UFS_FSSTABLE:
1110                         UFSD("fs is stable\n");
1111                         break;
1112                 case UFS_FSLOG:
1113                         UFSD("fs is logging fs\n");
1114                         break;
1115                 case UFS_FSOSF1:
1116                         UFSD("fs is DEC OSF/1\n");
1117                         break;
1118                 case UFS_FSACTIVE:
1119                         printk("ufs_read_super: fs is active\n");
1120                         sb->s_flags |= MS_RDONLY;
1121                         break;
1122                 case UFS_FSBAD:
1123                         printk("ufs_read_super: fs is bad\n");
1124                         sb->s_flags |= MS_RDONLY;
1125                         break;
1126                 default:
1127                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1128                         sb->s_flags |= MS_RDONLY;
1129                         break;
1130                 }
1131         } else {
1132                 printk("ufs_read_super: fs needs fsck\n");
1133                 sb->s_flags |= MS_RDONLY;
1134         }
1135 
1136         /*
1137          * Read ufs_super_block into internal data structures
1138          */
1139         sb->s_op = &ufs_super_ops;
1140         sb->s_export_op = &ufs_export_ops;
1141 
1142         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1143 
1144         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1145         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1146         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1147         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1148         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1149         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1150 
1151         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1152                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1153                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1154         } else {
1155                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1156                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1157         }
1158 
1159         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1160         /* s_bsize already set */
1161         /* s_fsize already set */
1162         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1163         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1164         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1165         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1166         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1167         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1168         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1169                 uspi->s_fshift);
1170         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1171         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1172         /* s_sbsize already set */
1173         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1174         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1175         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1176         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1177         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1178         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1179         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1180         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1181 
1182         if (uspi->fs_magic == UFS2_MAGIC)
1183                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1184         else
1185                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1186 
1187         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1188         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1189         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1190         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1191         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1192         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1193         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1194         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1195         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1196         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1197         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1198         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1199         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1200         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1201 
1202         /*
1203          * Compute another frequently used values
1204          */
1205         uspi->s_fpbmask = uspi->s_fpb - 1;
1206         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1207                 uspi->s_apbshift = uspi->s_bshift - 3;
1208         else
1209                 uspi->s_apbshift = uspi->s_bshift - 2;
1210 
1211         uspi->s_2apbshift = uspi->s_apbshift * 2;
1212         uspi->s_3apbshift = uspi->s_apbshift * 3;
1213         uspi->s_apb = 1 << uspi->s_apbshift;
1214         uspi->s_2apb = 1 << uspi->s_2apbshift;
1215         uspi->s_3apb = 1 << uspi->s_3apbshift;
1216         uspi->s_apbmask = uspi->s_apb - 1;
1217         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1218         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1219         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1220         uspi->s_bpf = uspi->s_fsize << 3;
1221         uspi->s_bpfshift = uspi->s_fshift + 3;
1222         uspi->s_bpfmask = uspi->s_bpf - 1;
1223         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1224             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1225                 uspi->s_maxsymlinklen =
1226                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1227 
1228         if (uspi->fs_magic == UFS2_MAGIC)
1229                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1230         else
1231                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1232         if (uspi->s_maxsymlinklen > maxsymlen) {
1233                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1234                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1235                 uspi->s_maxsymlinklen = maxsymlen;
1236         }
1237         sb->s_max_links = UFS_LINK_MAX;
1238 
1239         inode = ufs_iget(sb, UFS_ROOTINO);
1240         if (IS_ERR(inode)) {
1241                 ret = PTR_ERR(inode);
1242                 goto failed;
1243         }
1244         sb->s_root = d_make_root(inode);
1245         if (!sb->s_root) {
1246                 ret = -ENOMEM;
1247                 goto failed;
1248         }
1249 
1250         ufs_setup_cstotal(sb);
1251         /*
1252          * Read cylinder group structures
1253          */
1254         if (!(sb->s_flags & MS_RDONLY))
1255                 if (!ufs_read_cylinder_structures(sb))
1256                         goto failed;
1257 
1258         UFSD("EXIT\n");
1259         return 0;
1260 
1261 failed:
1262         if (ubh)
1263                 ubh_brelse_uspi (uspi);
1264         kfree (uspi);
1265         kfree(sbi);
1266         sb->s_fs_info = NULL;
1267         UFSD("EXIT (FAILED)\n");
1268         return ret;
1269 
1270 failed_nomem:
1271         UFSD("EXIT (NOMEM)\n");
1272         return -ENOMEM;
1273 }
1274 
1275 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1276 {
1277         struct ufs_sb_private_info * uspi;
1278         struct ufs_super_block_first * usb1;
1279         struct ufs_super_block_third * usb3;
1280         unsigned new_mount_opt, ufstype;
1281         unsigned flags;
1282 
1283         lock_ufs(sb);
1284         mutex_lock(&UFS_SB(sb)->s_lock);
1285         uspi = UFS_SB(sb)->s_uspi;
1286         flags = UFS_SB(sb)->s_flags;
1287         usb1 = ubh_get_usb_first(uspi);
1288         usb3 = ubh_get_usb_third(uspi);
1289         
1290         /*
1291          * Allow the "check" option to be passed as a remount option.
1292          * It is not possible to change ufstype option during remount
1293          */
1294         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1295         new_mount_opt = 0;
1296         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1297         if (!ufs_parse_options (data, &new_mount_opt)) {
1298                 mutex_unlock(&UFS_SB(sb)->s_lock);
1299                 unlock_ufs(sb);
1300                 return -EINVAL;
1301         }
1302         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1303                 new_mount_opt |= ufstype;
1304         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1305                 printk("ufstype can't be changed during remount\n");
1306                 mutex_unlock(&UFS_SB(sb)->s_lock);
1307                 unlock_ufs(sb);
1308                 return -EINVAL;
1309         }
1310 
1311         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1312                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1313                 mutex_unlock(&UFS_SB(sb)->s_lock);
1314                 unlock_ufs(sb);
1315                 return 0;
1316         }
1317         
1318         /*
1319          * fs was mouted as rw, remounting ro
1320          */
1321         if (*mount_flags & MS_RDONLY) {
1322                 ufs_put_super_internal(sb);
1323                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1324                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1325                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1326                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1327                         ufs_set_fs_state(sb, usb1, usb3,
1328                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1329                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1330                 sb->s_flags |= MS_RDONLY;
1331         } else {
1332         /*
1333          * fs was mounted as ro, remounting rw
1334          */
1335 #ifndef CONFIG_UFS_FS_WRITE
1336                 printk("ufs was compiled with read-only support, "
1337                 "can't be mounted as read-write\n");
1338                 mutex_unlock(&UFS_SB(sb)->s_lock);
1339                 unlock_ufs(sb);
1340                 return -EINVAL;
1341 #else
1342                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1343                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1344                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1345                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1346                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1347                         printk("this ufstype is read-only supported\n");
1348                         mutex_unlock(&UFS_SB(sb)->s_lock);
1349                         unlock_ufs(sb);
1350                         return -EINVAL;
1351                 }
1352                 if (!ufs_read_cylinder_structures(sb)) {
1353                         printk("failed during remounting\n");
1354                         mutex_unlock(&UFS_SB(sb)->s_lock);
1355                         unlock_ufs(sb);
1356                         return -EPERM;
1357                 }
1358                 sb->s_flags &= ~MS_RDONLY;
1359 #endif
1360         }
1361         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1362         mutex_unlock(&UFS_SB(sb)->s_lock);
1363         unlock_ufs(sb);
1364         return 0;
1365 }
1366 
1367 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1368 {
1369         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1370         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1371         const struct match_token *tp = tokens;
1372 
1373         while (tp->token != Opt_onerror_panic && tp->token != mval)
1374                 ++tp;
1375         BUG_ON(tp->token == Opt_onerror_panic);
1376         seq_printf(seq, ",%s", tp->pattern);
1377 
1378         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1379         while (tp->token != Opt_err && tp->token != mval)
1380                 ++tp;
1381         BUG_ON(tp->token == Opt_err);
1382         seq_printf(seq, ",%s", tp->pattern);
1383 
1384         return 0;
1385 }
1386 
1387 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1388 {
1389         struct super_block *sb = dentry->d_sb;
1390         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1391         unsigned  flags = UFS_SB(sb)->s_flags;
1392         struct ufs_super_block_first *usb1;
1393         struct ufs_super_block_second *usb2;
1394         struct ufs_super_block_third *usb3;
1395         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1396 
1397         lock_ufs(sb);
1398 
1399         usb1 = ubh_get_usb_first(uspi);
1400         usb2 = ubh_get_usb_second(uspi);
1401         usb3 = ubh_get_usb_third(uspi);
1402         
1403         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1404                 buf->f_type = UFS2_MAGIC;
1405                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1406         } else {
1407                 buf->f_type = UFS_MAGIC;
1408                 buf->f_blocks = uspi->s_dsize;
1409         }
1410         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1411                 uspi->cs_total.cs_nffree;
1412         buf->f_ffree = uspi->cs_total.cs_nifree;
1413         buf->f_bsize = sb->s_blocksize;
1414         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1415                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1416         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1417         buf->f_namelen = UFS_MAXNAMLEN;
1418         buf->f_fsid.val[0] = (u32)id;
1419         buf->f_fsid.val[1] = (u32)(id >> 32);
1420 
1421         unlock_ufs(sb);
1422 
1423         return 0;
1424 }
1425 
1426 static struct kmem_cache * ufs_inode_cachep;
1427 
1428 static struct inode *ufs_alloc_inode(struct super_block *sb)
1429 {
1430         struct ufs_inode_info *ei;
1431         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1432         if (!ei)
1433                 return NULL;
1434         ei->vfs_inode.i_version = 1;
1435         return &ei->vfs_inode;
1436 }
1437 
1438 static void ufs_i_callback(struct rcu_head *head)
1439 {
1440         struct inode *inode = container_of(head, struct inode, i_rcu);
1441         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1442 }
1443 
1444 static void ufs_destroy_inode(struct inode *inode)
1445 {
1446         call_rcu(&inode->i_rcu, ufs_i_callback);
1447 }
1448 
1449 static void init_once(void *foo)
1450 {
1451         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1452 
1453         inode_init_once(&ei->vfs_inode);
1454 }
1455 
1456 static int init_inodecache(void)
1457 {
1458         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1459                                              sizeof(struct ufs_inode_info),
1460                                              0, (SLAB_RECLAIM_ACCOUNT|
1461                                                 SLAB_MEM_SPREAD),
1462                                              init_once);
1463         if (ufs_inode_cachep == NULL)
1464                 return -ENOMEM;
1465         return 0;
1466 }
1467 
1468 static void destroy_inodecache(void)
1469 {
1470         /*
1471          * Make sure all delayed rcu free inodes are flushed before we
1472          * destroy cache.
1473          */
1474         rcu_barrier();
1475         kmem_cache_destroy(ufs_inode_cachep);
1476 }
1477 
1478 static const struct super_operations ufs_super_ops = {
1479         .alloc_inode    = ufs_alloc_inode,
1480         .destroy_inode  = ufs_destroy_inode,
1481         .write_inode    = ufs_write_inode,
1482         .evict_inode    = ufs_evict_inode,
1483         .put_super      = ufs_put_super,
1484         .sync_fs        = ufs_sync_fs,
1485         .statfs         = ufs_statfs,
1486         .remount_fs     = ufs_remount,
1487         .show_options   = ufs_show_options,
1488 };
1489 
1490 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1491         int flags, const char *dev_name, void *data)
1492 {
1493         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1494 }
1495 
1496 static struct file_system_type ufs_fs_type = {
1497         .owner          = THIS_MODULE,
1498         .name           = "ufs",
1499         .mount          = ufs_mount,
1500         .kill_sb        = kill_block_super,
1501         .fs_flags       = FS_REQUIRES_DEV,
1502 };
1503 MODULE_ALIAS_FS("ufs");
1504 
1505 static int __init init_ufs_fs(void)
1506 {
1507         int err = init_inodecache();
1508         if (err)
1509                 goto out1;
1510         err = register_filesystem(&ufs_fs_type);
1511         if (err)
1512                 goto out;
1513         return 0;
1514 out:
1515         destroy_inodecache();
1516 out1:
1517         return err;
1518 }
1519 
1520 static void __exit exit_ufs_fs(void)
1521 {
1522         unregister_filesystem(&ufs_fs_type);
1523         destroy_inodecache();
1524 }
1525 
1526 module_init(init_ufs_fs)
1527 module_exit(exit_ufs_fs)
1528 MODULE_LICENSE("GPL");
1529 

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