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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 <asm/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(d_inode(child)->i_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->s_flags & MS_RDONLY)) {
282                 usb1->fs_clean = UFS_FSBAD;
283                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
284                 ufs_mark_sb_dirty(sb);
285                 sb->s_flags |= MS_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->s_flags & MS_RDONLY)) {
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 |= MS_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              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
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_44BSD &&
600              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
601             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
602                 /*we have statistic in different place, then usual*/
603                 usb2->fs_un.fs_u2.cs_ndir =
604                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
605                 usb2->fs_un.fs_u2.cs_nbfree =
606                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
607                 usb3->fs_un1.fs_u2.cs_nifree =
608                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
609                 usb3->fs_un1.fs_u2.cs_nffree =
610                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
611         } else {
612                 usb1->fs_cstotal.cs_ndir =
613                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
614                 usb1->fs_cstotal.cs_nbfree =
615                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
616                 usb1->fs_cstotal.cs_nifree =
617                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
618                 usb1->fs_cstotal.cs_nffree =
619                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
620         }
621         ubh_mark_buffer_dirty(USPI_UBH(uspi));
622         ufs_print_super_stuff(sb, usb1, usb2, usb3);
623         UFSD("EXIT\n");
624 }
625 
626 /**
627  * ufs_put_super_internal() - put on-disk intrenal structures
628  * @sb: pointer to super_block structure
629  * Put on-disk structures associated with cylinder groups
630  * and write them back to disk, also update cs_total on disk
631  */
632 static void ufs_put_super_internal(struct super_block *sb)
633 {
634         struct ufs_sb_info *sbi = UFS_SB(sb);
635         struct ufs_sb_private_info *uspi = sbi->s_uspi;
636         struct ufs_buffer_head * ubh;
637         unsigned char * base, * space;
638         unsigned blks, size, i;
639 
640         
641         UFSD("ENTER\n");
642 
643         ufs_put_cstotal(sb);
644         size = uspi->s_cssize;
645         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
646         base = space = (char*) sbi->s_csp;
647         for (i = 0; i < blks; i += uspi->s_fpb) {
648                 size = uspi->s_bsize;
649                 if (i + uspi->s_fpb > blks)
650                         size = (blks - i) * uspi->s_fsize;
651 
652                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
653 
654                 ubh_memcpyubh (ubh, space, size);
655                 space += size;
656                 ubh_mark_buffer_uptodate (ubh, 1);
657                 ubh_mark_buffer_dirty (ubh);
658                 ubh_brelse (ubh);
659         }
660         for (i = 0; i < sbi->s_cg_loaded; i++) {
661                 ufs_put_cylinder (sb, i);
662                 kfree (sbi->s_ucpi[i]);
663         }
664         for (; i < UFS_MAX_GROUP_LOADED; i++) 
665                 kfree (sbi->s_ucpi[i]);
666         for (i = 0; i < uspi->s_ncg; i++) 
667                 brelse (sbi->s_ucg[i]);
668         kfree (sbi->s_ucg);
669         kfree (base);
670 
671         UFSD("EXIT\n");
672 }
673 
674 static int ufs_sync_fs(struct super_block *sb, int wait)
675 {
676         struct ufs_sb_private_info * uspi;
677         struct ufs_super_block_first * usb1;
678         struct ufs_super_block_third * usb3;
679         unsigned flags;
680 
681         mutex_lock(&UFS_SB(sb)->s_lock);
682 
683         UFSD("ENTER\n");
684 
685         flags = UFS_SB(sb)->s_flags;
686         uspi = UFS_SB(sb)->s_uspi;
687         usb1 = ubh_get_usb_first(uspi);
688         usb3 = ubh_get_usb_third(uspi);
689 
690         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
691         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
692             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
693             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
694                 ufs_set_fs_state(sb, usb1, usb3,
695                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
696         ufs_put_cstotal(sb);
697 
698         UFSD("EXIT\n");
699         mutex_unlock(&UFS_SB(sb)->s_lock);
700 
701         return 0;
702 }
703 
704 static void delayed_sync_fs(struct work_struct *work)
705 {
706         struct ufs_sb_info *sbi;
707 
708         sbi = container_of(work, struct ufs_sb_info, sync_work.work);
709 
710         spin_lock(&sbi->work_lock);
711         sbi->work_queued = 0;
712         spin_unlock(&sbi->work_lock);
713 
714         ufs_sync_fs(sbi->sb, 1);
715 }
716 
717 void ufs_mark_sb_dirty(struct super_block *sb)
718 {
719         struct ufs_sb_info *sbi = UFS_SB(sb);
720         unsigned long delay;
721 
722         spin_lock(&sbi->work_lock);
723         if (!sbi->work_queued) {
724                 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
725                 queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
726                 sbi->work_queued = 1;
727         }
728         spin_unlock(&sbi->work_lock);
729 }
730 
731 static void ufs_put_super(struct super_block *sb)
732 {
733         struct ufs_sb_info * sbi = UFS_SB(sb);
734 
735         UFSD("ENTER\n");
736 
737         if (!(sb->s_flags & MS_RDONLY))
738                 ufs_put_super_internal(sb);
739         cancel_delayed_work_sync(&sbi->sync_work);
740 
741         ubh_brelse_uspi (sbi->s_uspi);
742         kfree (sbi->s_uspi);
743         kfree (sbi);
744         sb->s_fs_info = NULL;
745         UFSD("EXIT\n");
746         return;
747 }
748 
749 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
750 {
751         struct ufs_sb_info * sbi;
752         struct ufs_sb_private_info * uspi;
753         struct ufs_super_block_first * usb1;
754         struct ufs_super_block_second * usb2;
755         struct ufs_super_block_third * usb3;
756         struct ufs_buffer_head * ubh;   
757         struct inode *inode;
758         unsigned block_size, super_block_size;
759         unsigned flags;
760         unsigned super_block_offset;
761         unsigned maxsymlen;
762         int ret = -EINVAL;
763 
764         uspi = NULL;
765         ubh = NULL;
766         flags = 0;
767         
768         UFSD("ENTER\n");
769 
770 #ifndef CONFIG_UFS_FS_WRITE
771         if (!(sb->s_flags & MS_RDONLY)) {
772                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
773                 return -EROFS;
774         }
775 #endif
776                 
777         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
778         if (!sbi)
779                 goto failed_nomem;
780         sb->s_fs_info = sbi;
781         sbi->sb = sb;
782 
783         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
784         
785         mutex_init(&sbi->s_lock);
786         spin_lock_init(&sbi->work_lock);
787         INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
788         /*
789          * Set default mount options
790          * Parse mount options
791          */
792         sbi->s_mount_opt = 0;
793         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
794         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
795                 pr_err("wrong mount options\n");
796                 goto failed;
797         }
798         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
799                 if (!silent)
800                         pr_err("You didn't specify the type of your ufs filesystem\n\n"
801                         "mount -t ufs -o ufstype="
802                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
803                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
804                         "default is ufstype=old\n");
805                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
806         }
807 
808         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
809         sbi->s_uspi = uspi;
810         if (!uspi)
811                 goto failed;
812         uspi->s_dirblksize = UFS_SECTOR_SIZE;
813         super_block_offset=UFS_SBLOCK;
814 
815         /* Keep 2Gig file limit. Some UFS variants need to override 
816            this but as I don't know which I'll let those in the know loosen
817            the rules */
818         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
819         case UFS_MOUNT_UFSTYPE_44BSD:
820                 UFSD("ufstype=44bsd\n");
821                 uspi->s_fsize = block_size = 512;
822                 uspi->s_fmask = ~(512 - 1);
823                 uspi->s_fshift = 9;
824                 uspi->s_sbsize = super_block_size = 1536;
825                 uspi->s_sbbase = 0;
826                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
827                 break;
828         case UFS_MOUNT_UFSTYPE_UFS2:
829                 UFSD("ufstype=ufs2\n");
830                 super_block_offset=SBLOCK_UFS2;
831                 uspi->s_fsize = block_size = 512;
832                 uspi->s_fmask = ~(512 - 1);
833                 uspi->s_fshift = 9;
834                 uspi->s_sbsize = super_block_size = 1536;
835                 uspi->s_sbbase =  0;
836                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
837                 break;
838                 
839         case UFS_MOUNT_UFSTYPE_SUN:
840                 UFSD("ufstype=sun\n");
841                 uspi->s_fsize = block_size = 1024;
842                 uspi->s_fmask = ~(1024 - 1);
843                 uspi->s_fshift = 10;
844                 uspi->s_sbsize = super_block_size = 2048;
845                 uspi->s_sbbase = 0;
846                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
847                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
848                 break;
849 
850         case UFS_MOUNT_UFSTYPE_SUNOS:
851                 UFSD("ufstype=sunos\n");
852                 uspi->s_fsize = block_size = 1024;
853                 uspi->s_fmask = ~(1024 - 1);
854                 uspi->s_fshift = 10;
855                 uspi->s_sbsize = 2048;
856                 super_block_size = 2048;
857                 uspi->s_sbbase = 0;
858                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
859                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
860                 break;
861 
862         case UFS_MOUNT_UFSTYPE_SUNx86:
863                 UFSD("ufstype=sunx86\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_SUNx86 | UFS_CG_SUN;
871                 break;
872 
873         case UFS_MOUNT_UFSTYPE_OLD:
874                 UFSD("ufstype=old\n");
875                 uspi->s_fsize = block_size = 1024;
876                 uspi->s_fmask = ~(1024 - 1);
877                 uspi->s_fshift = 10;
878                 uspi->s_sbsize = super_block_size = 2048;
879                 uspi->s_sbbase = 0;
880                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
881                 if (!(sb->s_flags & MS_RDONLY)) {
882                         if (!silent)
883                                 pr_info("ufstype=old is supported read-only\n");
884                         sb->s_flags |= MS_RDONLY;
885                 }
886                 break;
887         
888         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
889                 UFSD("ufstype=nextstep\n");
890                 uspi->s_fsize = block_size = 1024;
891                 uspi->s_fmask = ~(1024 - 1);
892                 uspi->s_fshift = 10;
893                 uspi->s_sbsize = super_block_size = 2048;
894                 uspi->s_sbbase = 0;
895                 uspi->s_dirblksize = 1024;
896                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
897                 if (!(sb->s_flags & MS_RDONLY)) {
898                         if (!silent)
899                                 pr_info("ufstype=nextstep is supported read-only\n");
900                         sb->s_flags |= MS_RDONLY;
901                 }
902                 break;
903         
904         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
905                 UFSD("ufstype=nextstep-cd\n");
906                 uspi->s_fsize = block_size = 2048;
907                 uspi->s_fmask = ~(2048 - 1);
908                 uspi->s_fshift = 11;
909                 uspi->s_sbsize = super_block_size = 2048;
910                 uspi->s_sbbase = 0;
911                 uspi->s_dirblksize = 1024;
912                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
913                 if (!(sb->s_flags & MS_RDONLY)) {
914                         if (!silent)
915                                 pr_info("ufstype=nextstep-cd is supported read-only\n");
916                         sb->s_flags |= MS_RDONLY;
917                 }
918                 break;
919         
920         case UFS_MOUNT_UFSTYPE_OPENSTEP:
921                 UFSD("ufstype=openstep\n");
922                 uspi->s_fsize = block_size = 1024;
923                 uspi->s_fmask = ~(1024 - 1);
924                 uspi->s_fshift = 10;
925                 uspi->s_sbsize = super_block_size = 2048;
926                 uspi->s_sbbase = 0;
927                 uspi->s_dirblksize = 1024;
928                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
929                 if (!(sb->s_flags & MS_RDONLY)) {
930                         if (!silent)
931                                 pr_info("ufstype=openstep is supported read-only\n");
932                         sb->s_flags |= MS_RDONLY;
933                 }
934                 break;
935         
936         case UFS_MOUNT_UFSTYPE_HP:
937                 UFSD("ufstype=hp\n");
938                 uspi->s_fsize = block_size = 1024;
939                 uspi->s_fmask = ~(1024 - 1);
940                 uspi->s_fshift = 10;
941                 uspi->s_sbsize = super_block_size = 2048;
942                 uspi->s_sbbase = 0;
943                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
944                 if (!(sb->s_flags & MS_RDONLY)) {
945                         if (!silent)
946                                 pr_info("ufstype=hp is supported read-only\n");
947                         sb->s_flags |= MS_RDONLY;
948                 }
949                 break;
950         default:
951                 if (!silent)
952                         pr_err("unknown ufstype\n");
953                 goto failed;
954         }
955         
956 again:  
957         if (!sb_set_blocksize(sb, block_size)) {
958                 pr_err("failed to set blocksize\n");
959                 goto failed;
960         }
961 
962         /*
963          * read ufs super block from device
964          */
965 
966         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
967         
968         if (!ubh) 
969             goto failed;
970 
971         usb1 = ubh_get_usb_first(uspi);
972         usb2 = ubh_get_usb_second(uspi);
973         usb3 = ubh_get_usb_third(uspi);
974 
975         /* Sort out mod used on SunOS 4.1.3 for fs_state */
976         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
977         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
978             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
979                 flags &= ~UFS_ST_MASK;
980                 flags |=  UFS_ST_SUN;
981         }
982 
983         /*
984          * Check ufs magic number
985          */
986         sbi->s_bytesex = BYTESEX_LE;
987         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
988                 case UFS_MAGIC:
989                 case UFS_MAGIC_BW:
990                 case UFS2_MAGIC:
991                 case UFS_MAGIC_LFN:
992                 case UFS_MAGIC_FEA:
993                 case UFS_MAGIC_4GB:
994                         goto magic_found;
995         }
996         sbi->s_bytesex = BYTESEX_BE;
997         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
998                 case UFS_MAGIC:
999                 case UFS_MAGIC_BW:
1000                 case UFS2_MAGIC:
1001                 case UFS_MAGIC_LFN:
1002                 case UFS_MAGIC_FEA:
1003                 case UFS_MAGIC_4GB:
1004                         goto magic_found;
1005         }
1006 
1007         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
1008           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
1009           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
1010           && uspi->s_sbbase < 256) {
1011                 ubh_brelse_uspi(uspi);
1012                 ubh = NULL;
1013                 uspi->s_sbbase += 8;
1014                 goto again;
1015         }
1016         if (!silent)
1017                 pr_err("%s(): bad magic number\n", __func__);
1018         goto failed;
1019 
1020 magic_found:
1021         /*
1022          * Check block and fragment sizes
1023          */
1024         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
1025         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
1026         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
1027         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1028         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1029 
1030         if (!is_power_of_2(uspi->s_fsize)) {
1031                 pr_err("%s(): fragment size %u is not a power of 2\n",
1032                        __func__, uspi->s_fsize);
1033                 goto failed;
1034         }
1035         if (uspi->s_fsize < 512) {
1036                 pr_err("%s(): fragment size %u is too small\n",
1037                        __func__, uspi->s_fsize);
1038                 goto failed;
1039         }
1040         if (uspi->s_fsize > 4096) {
1041                 pr_err("%s(): fragment size %u is too large\n",
1042                        __func__, uspi->s_fsize);
1043                 goto failed;
1044         }
1045         if (!is_power_of_2(uspi->s_bsize)) {
1046                 pr_err("%s(): block size %u is not a power of 2\n",
1047                        __func__, uspi->s_bsize);
1048                 goto failed;
1049         }
1050         if (uspi->s_bsize < 4096) {
1051                 pr_err("%s(): block size %u is too small\n",
1052                        __func__, uspi->s_bsize);
1053                 goto failed;
1054         }
1055         if (uspi->s_bsize / uspi->s_fsize > 8) {
1056                 pr_err("%s(): too many fragments per block (%u)\n",
1057                        __func__, uspi->s_bsize / uspi->s_fsize);
1058                 goto failed;
1059         }
1060         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
1061                 ubh_brelse_uspi(uspi);
1062                 ubh = NULL;
1063                 block_size = uspi->s_fsize;
1064                 super_block_size = uspi->s_sbsize;
1065                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
1066                 goto again;
1067         }
1068 
1069         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1070         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1071 
1072         /*
1073          * Check, if file system was correctly unmounted.
1074          * If not, make it read only.
1075          */
1076         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1077           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1078           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1079             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1080           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1081           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1082                 switch(usb1->fs_clean) {
1083                 case UFS_FSCLEAN:
1084                         UFSD("fs is clean\n");
1085                         break;
1086                 case UFS_FSSTABLE:
1087                         UFSD("fs is stable\n");
1088                         break;
1089                 case UFS_FSLOG:
1090                         UFSD("fs is logging fs\n");
1091                         break;
1092                 case UFS_FSOSF1:
1093                         UFSD("fs is DEC OSF/1\n");
1094                         break;
1095                 case UFS_FSACTIVE:
1096                         pr_err("%s(): fs is active\n", __func__);
1097                         sb->s_flags |= MS_RDONLY;
1098                         break;
1099                 case UFS_FSBAD:
1100                         pr_err("%s(): fs is bad\n", __func__);
1101                         sb->s_flags |= MS_RDONLY;
1102                         break;
1103                 default:
1104                         pr_err("%s(): can't grok fs_clean 0x%x\n",
1105                                __func__, usb1->fs_clean);
1106                         sb->s_flags |= MS_RDONLY;
1107                         break;
1108                 }
1109         } else {
1110                 pr_err("%s(): fs needs fsck\n", __func__);
1111                 sb->s_flags |= MS_RDONLY;
1112         }
1113 
1114         /*
1115          * Read ufs_super_block into internal data structures
1116          */
1117         sb->s_op = &ufs_super_ops;
1118         sb->s_export_op = &ufs_export_ops;
1119 
1120         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1121 
1122         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1123         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1124         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1125         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1126         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1127         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1128 
1129         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1130                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1131                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1132         } else {
1133                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1134                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1135         }
1136 
1137         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1138         /* s_bsize already set */
1139         /* s_fsize already set */
1140         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1141         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1142         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1143         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1144         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1145         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1146         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1147                 uspi->s_fshift);
1148         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1149         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1150         /* s_sbsize already set */
1151         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1152         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1153         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1154         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1155         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1156         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1157         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1158         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1159 
1160         if (uspi->fs_magic == UFS2_MAGIC)
1161                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1162         else
1163                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1164 
1165         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1166         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1167         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1168         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1169         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1170         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1171         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1172         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1173         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1174         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1175         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1176         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1177         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1178         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1179 
1180         /*
1181          * Compute another frequently used values
1182          */
1183         uspi->s_fpbmask = uspi->s_fpb - 1;
1184         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1185                 uspi->s_apbshift = uspi->s_bshift - 3;
1186         else
1187                 uspi->s_apbshift = uspi->s_bshift - 2;
1188 
1189         uspi->s_2apbshift = uspi->s_apbshift * 2;
1190         uspi->s_3apbshift = uspi->s_apbshift * 3;
1191         uspi->s_apb = 1 << uspi->s_apbshift;
1192         uspi->s_2apb = 1 << uspi->s_2apbshift;
1193         uspi->s_3apb = 1 << uspi->s_3apbshift;
1194         uspi->s_apbmask = uspi->s_apb - 1;
1195         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1196         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1197         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1198         uspi->s_bpf = uspi->s_fsize << 3;
1199         uspi->s_bpfshift = uspi->s_fshift + 3;
1200         uspi->s_bpfmask = uspi->s_bpf - 1;
1201         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1202             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1203                 uspi->s_maxsymlinklen =
1204                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1205 
1206         if (uspi->fs_magic == UFS2_MAGIC)
1207                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1208         else
1209                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1210         if (uspi->s_maxsymlinklen > maxsymlen) {
1211                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1212                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1213                 uspi->s_maxsymlinklen = maxsymlen;
1214         }
1215         sb->s_max_links = UFS_LINK_MAX;
1216 
1217         inode = ufs_iget(sb, UFS_ROOTINO);
1218         if (IS_ERR(inode)) {
1219                 ret = PTR_ERR(inode);
1220                 goto failed;
1221         }
1222         sb->s_root = d_make_root(inode);
1223         if (!sb->s_root) {
1224                 ret = -ENOMEM;
1225                 goto failed;
1226         }
1227 
1228         ufs_setup_cstotal(sb);
1229         /*
1230          * Read cylinder group structures
1231          */
1232         if (!(sb->s_flags & MS_RDONLY))
1233                 if (!ufs_read_cylinder_structures(sb))
1234                         goto failed;
1235 
1236         UFSD("EXIT\n");
1237         return 0;
1238 
1239 failed:
1240         if (ubh)
1241                 ubh_brelse_uspi (uspi);
1242         kfree (uspi);
1243         kfree(sbi);
1244         sb->s_fs_info = NULL;
1245         UFSD("EXIT (FAILED)\n");
1246         return ret;
1247 
1248 failed_nomem:
1249         UFSD("EXIT (NOMEM)\n");
1250         return -ENOMEM;
1251 }
1252 
1253 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1254 {
1255         struct ufs_sb_private_info * uspi;
1256         struct ufs_super_block_first * usb1;
1257         struct ufs_super_block_third * usb3;
1258         unsigned new_mount_opt, ufstype;
1259         unsigned flags;
1260 
1261         sync_filesystem(sb);
1262         mutex_lock(&UFS_SB(sb)->s_lock);
1263         uspi = UFS_SB(sb)->s_uspi;
1264         flags = UFS_SB(sb)->s_flags;
1265         usb1 = ubh_get_usb_first(uspi);
1266         usb3 = ubh_get_usb_third(uspi);
1267         
1268         /*
1269          * Allow the "check" option to be passed as a remount option.
1270          * It is not possible to change ufstype option during remount
1271          */
1272         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1273         new_mount_opt = 0;
1274         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1275         if (!ufs_parse_options (data, &new_mount_opt)) {
1276                 mutex_unlock(&UFS_SB(sb)->s_lock);
1277                 return -EINVAL;
1278         }
1279         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1280                 new_mount_opt |= ufstype;
1281         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1282                 pr_err("ufstype can't be changed during remount\n");
1283                 mutex_unlock(&UFS_SB(sb)->s_lock);
1284                 return -EINVAL;
1285         }
1286 
1287         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1288                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1289                 mutex_unlock(&UFS_SB(sb)->s_lock);
1290                 return 0;
1291         }
1292         
1293         /*
1294          * fs was mouted as rw, remounting ro
1295          */
1296         if (*mount_flags & MS_RDONLY) {
1297                 ufs_put_super_internal(sb);
1298                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1299                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1300                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1301                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1302                         ufs_set_fs_state(sb, usb1, usb3,
1303                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1304                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1305                 sb->s_flags |= MS_RDONLY;
1306         } else {
1307         /*
1308          * fs was mounted as ro, remounting rw
1309          */
1310 #ifndef CONFIG_UFS_FS_WRITE
1311                 pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
1312                 mutex_unlock(&UFS_SB(sb)->s_lock);
1313                 return -EINVAL;
1314 #else
1315                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1316                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1317                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1318                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1319                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1320                         pr_err("this ufstype is read-only supported\n");
1321                         mutex_unlock(&UFS_SB(sb)->s_lock);
1322                         return -EINVAL;
1323                 }
1324                 if (!ufs_read_cylinder_structures(sb)) {
1325                         pr_err("failed during remounting\n");
1326                         mutex_unlock(&UFS_SB(sb)->s_lock);
1327                         return -EPERM;
1328                 }
1329                 sb->s_flags &= ~MS_RDONLY;
1330 #endif
1331         }
1332         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1333         mutex_unlock(&UFS_SB(sb)->s_lock);
1334         return 0;
1335 }
1336 
1337 static int ufs_show_options(struct seq_file *seq, struct dentry *root)
1338 {
1339         struct ufs_sb_info *sbi = UFS_SB(root->d_sb);
1340         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1341         const struct match_token *tp = tokens;
1342 
1343         while (tp->token != Opt_onerror_panic && tp->token != mval)
1344                 ++tp;
1345         BUG_ON(tp->token == Opt_onerror_panic);
1346         seq_printf(seq, ",%s", tp->pattern);
1347 
1348         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1349         while (tp->token != Opt_err && tp->token != mval)
1350                 ++tp;
1351         BUG_ON(tp->token == Opt_err);
1352         seq_printf(seq, ",%s", tp->pattern);
1353 
1354         return 0;
1355 }
1356 
1357 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1358 {
1359         struct super_block *sb = dentry->d_sb;
1360         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1361         unsigned  flags = UFS_SB(sb)->s_flags;
1362         struct ufs_super_block_third *usb3;
1363         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1364 
1365         mutex_lock(&UFS_SB(sb)->s_lock);
1366         usb3 = ubh_get_usb_third(uspi);
1367         
1368         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1369                 buf->f_type = UFS2_MAGIC;
1370                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1371         } else {
1372                 buf->f_type = UFS_MAGIC;
1373                 buf->f_blocks = uspi->s_dsize;
1374         }
1375         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1376                 uspi->cs_total.cs_nffree;
1377         buf->f_ffree = uspi->cs_total.cs_nifree;
1378         buf->f_bsize = sb->s_blocksize;
1379         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1380                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1381         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1382         buf->f_namelen = UFS_MAXNAMLEN;
1383         buf->f_fsid.val[0] = (u32)id;
1384         buf->f_fsid.val[1] = (u32)(id >> 32);
1385 
1386         mutex_unlock(&UFS_SB(sb)->s_lock);
1387 
1388         return 0;
1389 }
1390 
1391 static struct kmem_cache * ufs_inode_cachep;
1392 
1393 static struct inode *ufs_alloc_inode(struct super_block *sb)
1394 {
1395         struct ufs_inode_info *ei;
1396 
1397         ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
1398         if (!ei)
1399                 return NULL;
1400 
1401         ei->vfs_inode.i_version = 1;
1402         seqlock_init(&ei->meta_lock);
1403         mutex_init(&ei->truncate_mutex);
1404         return &ei->vfs_inode;
1405 }
1406 
1407 static void ufs_i_callback(struct rcu_head *head)
1408 {
1409         struct inode *inode = container_of(head, struct inode, i_rcu);
1410         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1411 }
1412 
1413 static void ufs_destroy_inode(struct inode *inode)
1414 {
1415         call_rcu(&inode->i_rcu, ufs_i_callback);
1416 }
1417 
1418 static void init_once(void *foo)
1419 {
1420         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1421 
1422         inode_init_once(&ei->vfs_inode);
1423 }
1424 
1425 static int __init init_inodecache(void)
1426 {
1427         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1428                                              sizeof(struct ufs_inode_info),
1429                                              0, (SLAB_RECLAIM_ACCOUNT|
1430                                                 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
1431                                              init_once);
1432         if (ufs_inode_cachep == NULL)
1433                 return -ENOMEM;
1434         return 0;
1435 }
1436 
1437 static void destroy_inodecache(void)
1438 {
1439         /*
1440          * Make sure all delayed rcu free inodes are flushed before we
1441          * destroy cache.
1442          */
1443         rcu_barrier();
1444         kmem_cache_destroy(ufs_inode_cachep);
1445 }
1446 
1447 static const struct super_operations ufs_super_ops = {
1448         .alloc_inode    = ufs_alloc_inode,
1449         .destroy_inode  = ufs_destroy_inode,
1450         .write_inode    = ufs_write_inode,
1451         .evict_inode    = ufs_evict_inode,
1452         .put_super      = ufs_put_super,
1453         .sync_fs        = ufs_sync_fs,
1454         .statfs         = ufs_statfs,
1455         .remount_fs     = ufs_remount,
1456         .show_options   = ufs_show_options,
1457 };
1458 
1459 static struct dentry *ufs_mount(struct file_system_type *fs_type,
1460         int flags, const char *dev_name, void *data)
1461 {
1462         return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1463 }
1464 
1465 static struct file_system_type ufs_fs_type = {
1466         .owner          = THIS_MODULE,
1467         .name           = "ufs",
1468         .mount          = ufs_mount,
1469         .kill_sb        = kill_block_super,
1470         .fs_flags       = FS_REQUIRES_DEV,
1471 };
1472 MODULE_ALIAS_FS("ufs");
1473 
1474 static int __init init_ufs_fs(void)
1475 {
1476         int err = init_inodecache();
1477         if (err)
1478                 goto out1;
1479         err = register_filesystem(&ufs_fs_type);
1480         if (err)
1481                 goto out;
1482         return 0;
1483 out:
1484         destroy_inodecache();
1485 out1:
1486         return err;
1487 }
1488 
1489 static void __exit exit_ufs_fs(void)
1490 {
1491         unregister_filesystem(&ufs_fs_type);
1492         destroy_inodecache();
1493 }
1494 
1495 module_init(init_ufs_fs)
1496 module_exit(exit_ufs_fs)
1497 MODULE_LICENSE("GPL");
1498 

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