ufs: ensure fast symlinks are NUL-terminated
[linux-2.6.git] / fs / ufs / super.c
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/module.h>
70 #include <linux/bitops.h>
71
72 #include <stdarg.h>
73
74 #include <asm/uaccess.h>
75 #include <asm/system.h>
76
77 #include <linux/errno.h>
78 #include <linux/fs.h>
79 #include <linux/quotaops.h>
80 #include <linux/slab.h>
81 #include <linux/time.h>
82 #include <linux/stat.h>
83 #include <linux/string.h>
84 #include <linux/blkdev.h>
85 #include <linux/init.h>
86 #include <linux/parser.h>
87 #include <linux/smp_lock.h>
88 #include <linux/buffer_head.h>
89 #include <linux/vfs.h>
90 #include <linux/log2.h>
91 #include <linux/mount.h>
92 #include <linux/seq_file.h>
93
94 #include "ufs_fs.h"
95 #include "ufs.h"
96 #include "swab.h"
97 #include "util.h"
98
99 #ifdef CONFIG_UFS_DEBUG
100 /*
101  * Print contents of ufs_super_block, useful for debugging
102  */
103 static void ufs_print_super_stuff(struct super_block *sb,
104                                   struct ufs_super_block_first *usb1,
105                                   struct ufs_super_block_second *usb2,
106                                   struct ufs_super_block_third *usb3)
107 {
108         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
109
110         printk("ufs_print_super_stuff\n");
111         printk("  magic:     0x%x\n", magic);
112         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
113                 printk("  fs_size:   %llu\n", (unsigned long long)
114                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
115                 printk("  fs_dsize:  %llu\n", (unsigned long long)
116                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
117                 printk("  bsize:         %u\n",
118                        fs32_to_cpu(sb, usb1->fs_bsize));
119                 printk("  fsize:         %u\n",
120                        fs32_to_cpu(sb, usb1->fs_fsize));
121                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
122                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
123                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
124                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
125                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
126                 printk("  cs_nbfree(No of free blocks):  %llu\n",
127                        (unsigned long long)
128                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
129                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
130                        (unsigned long long)
131                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
132                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
133                        (unsigned long long)
134                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
135                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
136                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
137         } else {
138                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
139                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
140                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
141                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
142                 printk(" cgoffset:    %u\n",
143                        fs32_to_cpu(sb, usb1->fs_cgoffset));
144                 printk(" ~cgmask:     0x%x\n",
145                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
146                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
147                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
148                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
149                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
150                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
151                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
152                 printk(" fragshift:   %u\n",
153                        fs32_to_cpu(sb, usb1->fs_fragshift));
154                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
155                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
156                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
157                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
158                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
159                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
160                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
161                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
162                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
163                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
164                 printk(" fstodb:      %u\n",
165                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
166                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
167                 printk(" ndir         %u\n",
168                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
169                 printk(" nifree       %u\n",
170                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
171                 printk(" nbfree       %u\n",
172                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
173                 printk(" nffree       %u\n",
174                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
175         }
176         printk("\n");
177 }
178
179 /*
180  * Print contents of ufs_cylinder_group, useful for debugging
181  */
182 static void ufs_print_cylinder_stuff(struct super_block *sb,
183                                      struct ufs_cylinder_group *cg)
184 {
185         printk("\nufs_print_cylinder_stuff\n");
186         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
187         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
188         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
189         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
190         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
191         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
192         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
193         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
194         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
195         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
196         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
197         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
198         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
199         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
200         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
201             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
202             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
203             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
204             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
205         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
206         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
207         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
208         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
209         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
210         printk("  clustersumoff %u\n",
211                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
212         printk("  clusteroff    %u\n",
213                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
214         printk("  nclusterblks  %u\n",
215                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
216         printk("\n");
217 }
218 #else
219 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
220 #  define ufs_print_cylinder_stuff(sb, cg) /**/
221 #endif /* CONFIG_UFS_DEBUG */
222
223 static const struct super_operations ufs_super_ops;
224
225 static char error_buf[1024];
226
227 void ufs_error (struct super_block * sb, const char * function,
228         const char * fmt, ...)
229 {
230         struct ufs_sb_private_info * uspi;
231         struct ufs_super_block_first * usb1;
232         va_list args;
233
234         uspi = UFS_SB(sb)->s_uspi;
235         usb1 = ubh_get_usb_first(uspi);
236         
237         if (!(sb->s_flags & MS_RDONLY)) {
238                 usb1->fs_clean = UFS_FSBAD;
239                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
240                 sb->s_dirt = 1;
241                 sb->s_flags |= MS_RDONLY;
242         }
243         va_start (args, fmt);
244         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
245         va_end (args);
246         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
247         case UFS_MOUNT_ONERROR_PANIC:
248                 panic ("UFS-fs panic (device %s): %s: %s\n", 
249                         sb->s_id, function, error_buf);
250
251         case UFS_MOUNT_ONERROR_LOCK:
252         case UFS_MOUNT_ONERROR_UMOUNT:
253         case UFS_MOUNT_ONERROR_REPAIR:
254                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
255                         sb->s_id, function, error_buf);
256         }               
257 }
258
259 void ufs_panic (struct super_block * sb, const char * function,
260         const char * fmt, ...)
261 {
262         struct ufs_sb_private_info * uspi;
263         struct ufs_super_block_first * usb1;
264         va_list args;
265         
266         uspi = UFS_SB(sb)->s_uspi;
267         usb1 = ubh_get_usb_first(uspi);
268         
269         if (!(sb->s_flags & MS_RDONLY)) {
270                 usb1->fs_clean = UFS_FSBAD;
271                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
272                 sb->s_dirt = 1;
273         }
274         va_start (args, fmt);
275         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
276         va_end (args);
277         sb->s_flags |= MS_RDONLY;
278         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
279                 sb->s_id, function, error_buf);
280 }
281
282 void ufs_warning (struct super_block * sb, const char * function,
283         const char * fmt, ...)
284 {
285         va_list args;
286
287         va_start (args, fmt);
288         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
289         va_end (args);
290         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
291                 sb->s_id, function, error_buf);
292 }
293
294 enum {
295        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
296        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
297        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
298        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
299        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
300        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
301        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
302        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
303        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
304        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
305        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
306        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
307        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
308        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
309        Opt_err
310 };
311
312 static const match_table_t tokens = {
313         {Opt_type_old, "ufstype=old"},
314         {Opt_type_sunx86, "ufstype=sunx86"},
315         {Opt_type_sun, "ufstype=sun"},
316         {Opt_type_sunos, "ufstype=sunos"},
317         {Opt_type_44bsd, "ufstype=44bsd"},
318         {Opt_type_ufs2, "ufstype=ufs2"},
319         {Opt_type_ufs2, "ufstype=5xbsd"},
320         {Opt_type_hp, "ufstype=hp"},
321         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
322         {Opt_type_nextstep, "ufstype=nextstep"},
323         {Opt_type_openstep, "ufstype=openstep"},
324 /*end of possible ufs types */
325         {Opt_onerror_panic, "onerror=panic"},
326         {Opt_onerror_lock, "onerror=lock"},
327         {Opt_onerror_umount, "onerror=umount"},
328         {Opt_onerror_repair, "onerror=repair"},
329         {Opt_err, NULL}
330 };
331
332 static int ufs_parse_options (char * options, unsigned * mount_options)
333 {
334         char * p;
335         
336         UFSD("ENTER\n");
337         
338         if (!options)
339                 return 1;
340
341         while ((p = strsep(&options, ",")) != NULL) {
342                 substring_t args[MAX_OPT_ARGS];
343                 int token;
344                 if (!*p)
345                         continue;
346
347                 token = match_token(p, tokens, args);
348                 switch (token) {
349                 case Opt_type_old:
350                         ufs_clear_opt (*mount_options, UFSTYPE);
351                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
352                         break;
353                 case Opt_type_sunx86:
354                         ufs_clear_opt (*mount_options, UFSTYPE);
355                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
356                         break;
357                 case Opt_type_sun:
358                         ufs_clear_opt (*mount_options, UFSTYPE);
359                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
360                         break;
361                 case Opt_type_sunos:
362                         ufs_clear_opt(*mount_options, UFSTYPE);
363                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
364                         break;
365                 case Opt_type_44bsd:
366                         ufs_clear_opt (*mount_options, UFSTYPE);
367                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
368                         break;
369                 case Opt_type_ufs2:
370                         ufs_clear_opt(*mount_options, UFSTYPE);
371                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
372                         break;
373                 case Opt_type_hp:
374                         ufs_clear_opt (*mount_options, UFSTYPE);
375                         ufs_set_opt (*mount_options, UFSTYPE_HP);
376                         break;
377                 case Opt_type_nextstepcd:
378                         ufs_clear_opt (*mount_options, UFSTYPE);
379                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
380                         break;
381                 case Opt_type_nextstep:
382                         ufs_clear_opt (*mount_options, UFSTYPE);
383                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
384                         break;
385                 case Opt_type_openstep:
386                         ufs_clear_opt (*mount_options, UFSTYPE);
387                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
388                         break;
389                 case Opt_onerror_panic:
390                         ufs_clear_opt (*mount_options, ONERROR);
391                         ufs_set_opt (*mount_options, ONERROR_PANIC);
392                         break;
393                 case Opt_onerror_lock:
394                         ufs_clear_opt (*mount_options, ONERROR);
395                         ufs_set_opt (*mount_options, ONERROR_LOCK);
396                         break;
397                 case Opt_onerror_umount:
398                         ufs_clear_opt (*mount_options, ONERROR);
399                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
400                         break;
401                 case Opt_onerror_repair:
402                         printk("UFS-fs: Unable to do repair on error, "
403                                 "will lock lock instead\n");
404                         ufs_clear_opt (*mount_options, ONERROR);
405                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
406                         break;
407                 default:
408                         printk("UFS-fs: Invalid option: \"%s\" "
409                                         "or missing value\n", p);
410                         return 0;
411                 }
412         }
413         return 1;
414 }
415
416 /*
417  * Diffrent types of UFS hold fs_cstotal in different
418  * places, and use diffrent data structure for it.
419  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
420  */
421 static void ufs_setup_cstotal(struct super_block *sb)
422 {
423         struct ufs_sb_info *sbi = UFS_SB(sb);
424         struct ufs_sb_private_info *uspi = sbi->s_uspi;
425         struct ufs_super_block_first *usb1;
426         struct ufs_super_block_second *usb2;
427         struct ufs_super_block_third *usb3;
428         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
429
430         UFSD("ENTER, mtype=%u\n", mtype);
431         usb1 = ubh_get_usb_first(uspi);
432         usb2 = ubh_get_usb_second(uspi);
433         usb3 = ubh_get_usb_third(uspi);
434
435         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
436              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
437             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
438                 /*we have statistic in different place, then usual*/
439                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
440                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
441                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
442                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
443         } else {
444                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
445                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
446                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
447                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
448         }
449         UFSD("EXIT\n");
450 }
451
452 /*
453  * Read on-disk structures associated with cylinder groups
454  */
455 static int ufs_read_cylinder_structures(struct super_block *sb)
456 {
457         struct ufs_sb_info *sbi = UFS_SB(sb);
458         struct ufs_sb_private_info *uspi = sbi->s_uspi;
459         struct ufs_buffer_head * ubh;
460         unsigned char * base, * space;
461         unsigned size, blks, i;
462         struct ufs_super_block_third *usb3;
463
464         UFSD("ENTER\n");
465
466         usb3 = ubh_get_usb_third(uspi);
467         /*
468          * Read cs structures from (usually) first data block
469          * on the device. 
470          */
471         size = uspi->s_cssize;
472         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
473         base = space = kmalloc(size, GFP_KERNEL);
474         if (!base)
475                 goto failed; 
476         sbi->s_csp = (struct ufs_csum *)space;
477         for (i = 0; i < blks; i += uspi->s_fpb) {
478                 size = uspi->s_bsize;
479                 if (i + uspi->s_fpb > blks)
480                         size = (blks - i) * uspi->s_fsize;
481
482                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
483                 
484                 if (!ubh)
485                         goto failed;
486
487                 ubh_ubhcpymem (space, ubh, size);
488
489                 space += size;
490                 ubh_brelse (ubh);
491                 ubh = NULL;
492         }
493
494         /*
495          * Read cylinder group (we read only first fragment from block
496          * at this time) and prepare internal data structures for cg caching.
497          */
498         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
499                 goto failed;
500         for (i = 0; i < uspi->s_ncg; i++) 
501                 sbi->s_ucg[i] = NULL;
502         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
503                 sbi->s_ucpi[i] = NULL;
504                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
505         }
506         for (i = 0; i < uspi->s_ncg; i++) {
507                 UFSD("read cg %u\n", i);
508                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
509                         goto failed;
510                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
511                         goto failed;
512
513                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
514         }
515         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
516                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
517                         goto failed;
518                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
519         }
520         sbi->s_cg_loaded = 0;
521         UFSD("EXIT\n");
522         return 1;
523
524 failed:
525         kfree (base);
526         if (sbi->s_ucg) {
527                 for (i = 0; i < uspi->s_ncg; i++)
528                         if (sbi->s_ucg[i])
529                                 brelse (sbi->s_ucg[i]);
530                 kfree (sbi->s_ucg);
531                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
532                         kfree (sbi->s_ucpi[i]);
533         }
534         UFSD("EXIT (FAILED)\n");
535         return 0;
536 }
537
538 /*
539  * Sync our internal copy of fs_cstotal with disk
540  */
541 static void ufs_put_cstotal(struct super_block *sb)
542 {
543         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
544         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
545         struct ufs_super_block_first *usb1;
546         struct ufs_super_block_second *usb2;
547         struct ufs_super_block_third *usb3;
548
549         UFSD("ENTER\n");
550         usb1 = ubh_get_usb_first(uspi);
551         usb2 = ubh_get_usb_second(uspi);
552         usb3 = ubh_get_usb_third(uspi);
553
554         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
555              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
556             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
557                 /*we have statistic in different place, then usual*/
558                 usb2->fs_un.fs_u2.cs_ndir =
559                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
560                 usb2->fs_un.fs_u2.cs_nbfree =
561                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
562                 usb3->fs_un1.fs_u2.cs_nifree =
563                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
564                 usb3->fs_un1.fs_u2.cs_nffree =
565                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
566         } else {
567                 usb1->fs_cstotal.cs_ndir =
568                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
569                 usb1->fs_cstotal.cs_nbfree =
570                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
571                 usb1->fs_cstotal.cs_nifree =
572                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
573                 usb1->fs_cstotal.cs_nffree =
574                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
575         }
576         ubh_mark_buffer_dirty(USPI_UBH(uspi));
577         ufs_print_super_stuff(sb, usb1, usb2, usb3);
578         UFSD("EXIT\n");
579 }
580
581 /**
582  * ufs_put_super_internal() - put on-disk intrenal structures
583  * @sb: pointer to super_block structure
584  * Put on-disk structures associated with cylinder groups
585  * and write them back to disk, also update cs_total on disk
586  */
587 static void ufs_put_super_internal(struct super_block *sb)
588 {
589         struct ufs_sb_info *sbi = UFS_SB(sb);
590         struct ufs_sb_private_info *uspi = sbi->s_uspi;
591         struct ufs_buffer_head * ubh;
592         unsigned char * base, * space;
593         unsigned blks, size, i;
594
595         
596         UFSD("ENTER\n");
597         ufs_put_cstotal(sb);
598         size = uspi->s_cssize;
599         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
600         base = space = (char*) sbi->s_csp;
601         for (i = 0; i < blks; i += uspi->s_fpb) {
602                 size = uspi->s_bsize;
603                 if (i + uspi->s_fpb > blks)
604                         size = (blks - i) * uspi->s_fsize;
605
606                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
607
608                 ubh_memcpyubh (ubh, space, size);
609                 space += size;
610                 ubh_mark_buffer_uptodate (ubh, 1);
611                 ubh_mark_buffer_dirty (ubh);
612                 ubh_brelse (ubh);
613         }
614         for (i = 0; i < sbi->s_cg_loaded; i++) {
615                 ufs_put_cylinder (sb, i);
616                 kfree (sbi->s_ucpi[i]);
617         }
618         for (; i < UFS_MAX_GROUP_LOADED; i++) 
619                 kfree (sbi->s_ucpi[i]);
620         for (i = 0; i < uspi->s_ncg; i++) 
621                 brelse (sbi->s_ucg[i]);
622         kfree (sbi->s_ucg);
623         kfree (base);
624         UFSD("EXIT\n");
625 }
626
627 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
628 {
629         struct ufs_sb_info * sbi;
630         struct ufs_sb_private_info * uspi;
631         struct ufs_super_block_first * usb1;
632         struct ufs_super_block_second * usb2;
633         struct ufs_super_block_third * usb3;
634         struct ufs_buffer_head * ubh;   
635         struct inode *inode;
636         unsigned block_size, super_block_size;
637         unsigned flags;
638         unsigned super_block_offset;
639         unsigned maxsymlen;
640         int ret = -EINVAL;
641
642         uspi = NULL;
643         ubh = NULL;
644         flags = 0;
645         
646         UFSD("ENTER\n");
647                 
648         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
649         if (!sbi)
650                 goto failed_nomem;
651         sb->s_fs_info = sbi;
652
653         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
654         
655 #ifndef CONFIG_UFS_FS_WRITE
656         if (!(sb->s_flags & MS_RDONLY)) {
657                 printk("ufs was compiled with read-only support, "
658                 "can't be mounted as read-write\n");
659                 goto failed;
660         }
661 #endif
662         /*
663          * Set default mount options
664          * Parse mount options
665          */
666         sbi->s_mount_opt = 0;
667         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
668         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
669                 printk("wrong mount options\n");
670                 goto failed;
671         }
672         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
673                 if (!silent)
674                         printk("You didn't specify the type of your ufs filesystem\n\n"
675                         "mount -t ufs -o ufstype="
676                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
677                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
678                         "default is ufstype=old\n");
679                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
680         }
681
682         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
683         sbi->s_uspi = uspi;
684         if (!uspi)
685                 goto failed;
686         uspi->s_dirblksize = UFS_SECTOR_SIZE;
687         super_block_offset=UFS_SBLOCK;
688
689         /* Keep 2Gig file limit. Some UFS variants need to override 
690            this but as I don't know which I'll let those in the know loosen
691            the rules */
692         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
693         case UFS_MOUNT_UFSTYPE_44BSD:
694                 UFSD("ufstype=44bsd\n");
695                 uspi->s_fsize = block_size = 512;
696                 uspi->s_fmask = ~(512 - 1);
697                 uspi->s_fshift = 9;
698                 uspi->s_sbsize = super_block_size = 1536;
699                 uspi->s_sbbase = 0;
700                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
701                 break;
702         case UFS_MOUNT_UFSTYPE_UFS2:
703                 UFSD("ufstype=ufs2\n");
704                 super_block_offset=SBLOCK_UFS2;
705                 uspi->s_fsize = block_size = 512;
706                 uspi->s_fmask = ~(512 - 1);
707                 uspi->s_fshift = 9;
708                 uspi->s_sbsize = super_block_size = 1536;
709                 uspi->s_sbbase =  0;
710                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
711                 break;
712                 
713         case UFS_MOUNT_UFSTYPE_SUN:
714                 UFSD("ufstype=sun\n");
715                 uspi->s_fsize = block_size = 1024;
716                 uspi->s_fmask = ~(1024 - 1);
717                 uspi->s_fshift = 10;
718                 uspi->s_sbsize = super_block_size = 2048;
719                 uspi->s_sbbase = 0;
720                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
721                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
722                 break;
723
724         case UFS_MOUNT_UFSTYPE_SUNOS:
725                 UFSD(("ufstype=sunos\n"))
726                 uspi->s_fsize = block_size = 1024;
727                 uspi->s_fmask = ~(1024 - 1);
728                 uspi->s_fshift = 10;
729                 uspi->s_sbsize = 2048;
730                 super_block_size = 2048;
731                 uspi->s_sbbase = 0;
732                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
733                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
734                 break;
735
736         case UFS_MOUNT_UFSTYPE_SUNx86:
737                 UFSD("ufstype=sunx86\n");
738                 uspi->s_fsize = block_size = 1024;
739                 uspi->s_fmask = ~(1024 - 1);
740                 uspi->s_fshift = 10;
741                 uspi->s_sbsize = super_block_size = 2048;
742                 uspi->s_sbbase = 0;
743                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
744                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
745                 break;
746
747         case UFS_MOUNT_UFSTYPE_OLD:
748                 UFSD("ufstype=old\n");
749                 uspi->s_fsize = block_size = 1024;
750                 uspi->s_fmask = ~(1024 - 1);
751                 uspi->s_fshift = 10;
752                 uspi->s_sbsize = super_block_size = 2048;
753                 uspi->s_sbbase = 0;
754                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
755                 if (!(sb->s_flags & MS_RDONLY)) {
756                         if (!silent)
757                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
758                         sb->s_flags |= MS_RDONLY;
759                 }
760                 break;
761         
762         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
763                 UFSD("ufstype=nextstep\n");
764                 uspi->s_fsize = block_size = 1024;
765                 uspi->s_fmask = ~(1024 - 1);
766                 uspi->s_fshift = 10;
767                 uspi->s_sbsize = super_block_size = 2048;
768                 uspi->s_sbbase = 0;
769                 uspi->s_dirblksize = 1024;
770                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
771                 if (!(sb->s_flags & MS_RDONLY)) {
772                         if (!silent)
773                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
774                         sb->s_flags |= MS_RDONLY;
775                 }
776                 break;
777         
778         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
779                 UFSD("ufstype=nextstep-cd\n");
780                 uspi->s_fsize = block_size = 2048;
781                 uspi->s_fmask = ~(2048 - 1);
782                 uspi->s_fshift = 11;
783                 uspi->s_sbsize = super_block_size = 2048;
784                 uspi->s_sbbase = 0;
785                 uspi->s_dirblksize = 1024;
786                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
787                 if (!(sb->s_flags & MS_RDONLY)) {
788                         if (!silent)
789                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
790                         sb->s_flags |= MS_RDONLY;
791                 }
792                 break;
793         
794         case UFS_MOUNT_UFSTYPE_OPENSTEP:
795                 UFSD("ufstype=openstep\n");
796                 uspi->s_fsize = block_size = 1024;
797                 uspi->s_fmask = ~(1024 - 1);
798                 uspi->s_fshift = 10;
799                 uspi->s_sbsize = super_block_size = 2048;
800                 uspi->s_sbbase = 0;
801                 uspi->s_dirblksize = 1024;
802                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
803                 if (!(sb->s_flags & MS_RDONLY)) {
804                         if (!silent)
805                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
806                         sb->s_flags |= MS_RDONLY;
807                 }
808                 break;
809         
810         case UFS_MOUNT_UFSTYPE_HP:
811                 UFSD("ufstype=hp\n");
812                 uspi->s_fsize = block_size = 1024;
813                 uspi->s_fmask = ~(1024 - 1);
814                 uspi->s_fshift = 10;
815                 uspi->s_sbsize = super_block_size = 2048;
816                 uspi->s_sbbase = 0;
817                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
818                 if (!(sb->s_flags & MS_RDONLY)) {
819                         if (!silent)
820                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
821                         sb->s_flags |= MS_RDONLY;
822                 }
823                 break;
824         default:
825                 if (!silent)
826                         printk("unknown ufstype\n");
827                 goto failed;
828         }
829         
830 again:  
831         if (!sb_set_blocksize(sb, block_size)) {
832                 printk(KERN_ERR "UFS: failed to set blocksize\n");
833                 goto failed;
834         }
835
836         /*
837          * read ufs super block from device
838          */
839
840         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
841         
842         if (!ubh) 
843             goto failed;
844
845         usb1 = ubh_get_usb_first(uspi);
846         usb2 = ubh_get_usb_second(uspi);
847         usb3 = ubh_get_usb_third(uspi);
848
849         /* Sort out mod used on SunOS 4.1.3 for fs_state */
850         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
851         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
852             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
853                 flags &= ~UFS_ST_MASK;
854                 flags |=  UFS_ST_SUN;
855         }
856
857         /*
858          * Check ufs magic number
859          */
860         sbi->s_bytesex = BYTESEX_LE;
861         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
862                 case UFS_MAGIC:
863                 case UFS2_MAGIC:
864                 case UFS_MAGIC_LFN:
865                 case UFS_MAGIC_FEA:
866                 case UFS_MAGIC_4GB:
867                         goto magic_found;
868         }
869         sbi->s_bytesex = BYTESEX_BE;
870         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
871                 case UFS_MAGIC:
872                 case UFS2_MAGIC:
873                 case UFS_MAGIC_LFN:
874                 case UFS_MAGIC_FEA:
875                 case UFS_MAGIC_4GB:
876                         goto magic_found;
877         }
878
879         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
880           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
881           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
882           && uspi->s_sbbase < 256) {
883                 ubh_brelse_uspi(uspi);
884                 ubh = NULL;
885                 uspi->s_sbbase += 8;
886                 goto again;
887         }
888         if (!silent)
889                 printk("ufs_read_super: bad magic number\n");
890         goto failed;
891
892 magic_found:
893         /*
894          * Check block and fragment sizes
895          */
896         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
897         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
898         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
899         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
900         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
901
902         if (!is_power_of_2(uspi->s_fsize)) {
903                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
904                         uspi->s_fsize);
905                         goto failed;
906         }
907         if (uspi->s_fsize < 512) {
908                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
909                         uspi->s_fsize);
910                 goto failed;
911         }
912         if (uspi->s_fsize > 4096) {
913                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
914                         uspi->s_fsize);
915                 goto failed;
916         }
917         if (!is_power_of_2(uspi->s_bsize)) {
918                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
919                         uspi->s_bsize);
920                 goto failed;
921         }
922         if (uspi->s_bsize < 4096) {
923                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
924                         uspi->s_bsize);
925                 goto failed;
926         }
927         if (uspi->s_bsize / uspi->s_fsize > 8) {
928                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
929                         uspi->s_bsize / uspi->s_fsize);
930                 goto failed;
931         }
932         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
933                 ubh_brelse_uspi(uspi);
934                 ubh = NULL;
935                 block_size = uspi->s_fsize;
936                 super_block_size = uspi->s_sbsize;
937                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
938                 goto again;
939         }
940
941         sbi->s_flags = flags;/*after that line some functions use s_flags*/
942         ufs_print_super_stuff(sb, usb1, usb2, usb3);
943
944         /*
945          * Check, if file system was correctly unmounted.
946          * If not, make it read only.
947          */
948         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
949           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
950           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
951             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
952           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
953           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
954                 switch(usb1->fs_clean) {
955                 case UFS_FSCLEAN:
956                         UFSD("fs is clean\n");
957                         break;
958                 case UFS_FSSTABLE:
959                         UFSD("fs is stable\n");
960                         break;
961                 case UFS_FSOSF1:
962                         UFSD("fs is DEC OSF/1\n");
963                         break;
964                 case UFS_FSACTIVE:
965                         printk("ufs_read_super: fs is active\n");
966                         sb->s_flags |= MS_RDONLY;
967                         break;
968                 case UFS_FSBAD:
969                         printk("ufs_read_super: fs is bad\n");
970                         sb->s_flags |= MS_RDONLY;
971                         break;
972                 default:
973                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
974                         sb->s_flags |= MS_RDONLY;
975                         break;
976                 }
977         } else {
978                 printk("ufs_read_super: fs needs fsck\n");
979                 sb->s_flags |= MS_RDONLY;
980         }
981
982         /*
983          * Read ufs_super_block into internal data structures
984          */
985         sb->s_op = &ufs_super_ops;
986         sb->dq_op = NULL; /***/
987         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
988
989         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
990         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
991         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
992         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
993         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
994         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
995
996         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
997                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
998                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
999         } else {
1000                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1001                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1002         }
1003
1004         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1005         /* s_bsize already set */
1006         /* s_fsize already set */
1007         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1008         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1009         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1010         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1011         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1012         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1013         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1014                 uspi->s_fshift);
1015         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1016         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1017         /* s_sbsize already set */
1018         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1019         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1020         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1021         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1022         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1023         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1024         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1025         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1026
1027         if (uspi->fs_magic == UFS2_MAGIC)
1028                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1029         else
1030                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1031
1032         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1033         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1034         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1035         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1036         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1037         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1038         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1039         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1040         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1041         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1042         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1043         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1044         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1045         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1046
1047         /*
1048          * Compute another frequently used values
1049          */
1050         uspi->s_fpbmask = uspi->s_fpb - 1;
1051         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1052                 uspi->s_apbshift = uspi->s_bshift - 3;
1053         else
1054                 uspi->s_apbshift = uspi->s_bshift - 2;
1055
1056         uspi->s_2apbshift = uspi->s_apbshift * 2;
1057         uspi->s_3apbshift = uspi->s_apbshift * 3;
1058         uspi->s_apb = 1 << uspi->s_apbshift;
1059         uspi->s_2apb = 1 << uspi->s_2apbshift;
1060         uspi->s_3apb = 1 << uspi->s_3apbshift;
1061         uspi->s_apbmask = uspi->s_apb - 1;
1062         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1063         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1064         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1065         uspi->s_bpf = uspi->s_fsize << 3;
1066         uspi->s_bpfshift = uspi->s_fshift + 3;
1067         uspi->s_bpfmask = uspi->s_bpf - 1;
1068         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1069             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1070                 uspi->s_maxsymlinklen =
1071                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1072
1073         if (uspi->fs_magic == UFS2_MAGIC)
1074                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1075         else
1076                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1077         if (uspi->s_maxsymlinklen > maxsymlen) {
1078                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1079                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1080                 uspi->s_maxsymlinklen = maxsymlen;
1081         }
1082
1083         inode = ufs_iget(sb, UFS_ROOTINO);
1084         if (IS_ERR(inode)) {
1085                 ret = PTR_ERR(inode);
1086                 goto failed;
1087         }
1088         sb->s_root = d_alloc_root(inode);
1089         if (!sb->s_root) {
1090                 ret = -ENOMEM;
1091                 goto dalloc_failed;
1092         }
1093
1094         ufs_setup_cstotal(sb);
1095         /*
1096          * Read cylinder group structures
1097          */
1098         if (!(sb->s_flags & MS_RDONLY))
1099                 if (!ufs_read_cylinder_structures(sb))
1100                         goto failed;
1101
1102         UFSD("EXIT\n");
1103         return 0;
1104
1105 dalloc_failed:
1106         iput(inode);
1107 failed:
1108         if (ubh)
1109                 ubh_brelse_uspi (uspi);
1110         kfree (uspi);
1111         kfree(sbi);
1112         sb->s_fs_info = NULL;
1113         UFSD("EXIT (FAILED)\n");
1114         return ret;
1115
1116 failed_nomem:
1117         UFSD("EXIT (NOMEM)\n");
1118         return -ENOMEM;
1119 }
1120
1121 static void ufs_write_super(struct super_block *sb)
1122 {
1123         struct ufs_sb_private_info * uspi;
1124         struct ufs_super_block_first * usb1;
1125         struct ufs_super_block_third * usb3;
1126         unsigned flags;
1127
1128         lock_kernel();
1129         UFSD("ENTER\n");
1130         flags = UFS_SB(sb)->s_flags;
1131         uspi = UFS_SB(sb)->s_uspi;
1132         usb1 = ubh_get_usb_first(uspi);
1133         usb3 = ubh_get_usb_third(uspi);
1134
1135         if (!(sb->s_flags & MS_RDONLY)) {
1136                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1137                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
1138                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1139                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1140                         ufs_set_fs_state(sb, usb1, usb3,
1141                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1142                 ufs_put_cstotal(sb);
1143         }
1144         sb->s_dirt = 0;
1145         UFSD("EXIT\n");
1146         unlock_kernel();
1147 }
1148
1149 static void ufs_put_super(struct super_block *sb)
1150 {
1151         struct ufs_sb_info * sbi = UFS_SB(sb);
1152                 
1153         UFSD("ENTER\n");
1154
1155         if (!(sb->s_flags & MS_RDONLY))
1156                 ufs_put_super_internal(sb);
1157         
1158         ubh_brelse_uspi (sbi->s_uspi);
1159         kfree (sbi->s_uspi);
1160         kfree (sbi);
1161         sb->s_fs_info = NULL;
1162         UFSD("EXIT\n");
1163         return;
1164 }
1165
1166
1167 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1168 {
1169         struct ufs_sb_private_info * uspi;
1170         struct ufs_super_block_first * usb1;
1171         struct ufs_super_block_third * usb3;
1172         unsigned new_mount_opt, ufstype;
1173         unsigned flags;
1174         
1175         uspi = UFS_SB(sb)->s_uspi;
1176         flags = UFS_SB(sb)->s_flags;
1177         usb1 = ubh_get_usb_first(uspi);
1178         usb3 = ubh_get_usb_third(uspi);
1179         
1180         /*
1181          * Allow the "check" option to be passed as a remount option.
1182          * It is not possible to change ufstype option during remount
1183          */
1184         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1185         new_mount_opt = 0;
1186         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1187         if (!ufs_parse_options (data, &new_mount_opt))
1188                 return -EINVAL;
1189         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1190                 new_mount_opt |= ufstype;
1191         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1192                 printk("ufstype can't be changed during remount\n");
1193                 return -EINVAL;
1194         }
1195
1196         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1197                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1198                 return 0;
1199         }
1200         
1201         /*
1202          * fs was mouted as rw, remounting ro
1203          */
1204         if (*mount_flags & MS_RDONLY) {
1205                 ufs_put_super_internal(sb);
1206                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1207                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1208                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1209                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1210                         ufs_set_fs_state(sb, usb1, usb3,
1211                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1212                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1213                 sb->s_dirt = 0;
1214                 sb->s_flags |= MS_RDONLY;
1215         } else {
1216         /*
1217          * fs was mounted as ro, remounting rw
1218          */
1219 #ifndef CONFIG_UFS_FS_WRITE
1220                 printk("ufs was compiled with read-only support, "
1221                 "can't be mounted as read-write\n");
1222                 return -EINVAL;
1223 #else
1224                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1225                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1226                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1227                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1228                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1229                         printk("this ufstype is read-only supported\n");
1230                         return -EINVAL;
1231                 }
1232                 if (!ufs_read_cylinder_structures(sb)) {
1233                         printk("failed during remounting\n");
1234                         return -EPERM;
1235                 }
1236                 sb->s_flags &= ~MS_RDONLY;
1237 #endif
1238         }
1239         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1240         return 0;
1241 }
1242
1243 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1244 {
1245         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1246         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1247         const struct match_token *tp = tokens;
1248
1249         while (tp->token != Opt_onerror_panic && tp->token != mval)
1250                 ++tp;
1251         BUG_ON(tp->token == Opt_onerror_panic);
1252         seq_printf(seq, ",%s", tp->pattern);
1253
1254         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1255         while (tp->token != Opt_err && tp->token != mval)
1256                 ++tp;
1257         BUG_ON(tp->token == Opt_err);
1258         seq_printf(seq, ",%s", tp->pattern);
1259
1260         return 0;
1261 }
1262
1263 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1264 {
1265         struct super_block *sb = dentry->d_sb;
1266         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1267         unsigned  flags = UFS_SB(sb)->s_flags;
1268         struct ufs_super_block_first *usb1;
1269         struct ufs_super_block_second *usb2;
1270         struct ufs_super_block_third *usb3;
1271
1272         lock_kernel();
1273
1274         usb1 = ubh_get_usb_first(uspi);
1275         usb2 = ubh_get_usb_second(uspi);
1276         usb3 = ubh_get_usb_third(uspi);
1277         
1278         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1279                 buf->f_type = UFS2_MAGIC;
1280                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1281         } else {
1282                 buf->f_type = UFS_MAGIC;
1283                 buf->f_blocks = uspi->s_dsize;
1284         }
1285         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1286                 uspi->cs_total.cs_nffree;
1287         buf->f_ffree = uspi->cs_total.cs_nifree;
1288         buf->f_bsize = sb->s_blocksize;
1289         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1290                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1291         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1292         buf->f_namelen = UFS_MAXNAMLEN;
1293
1294         unlock_kernel();
1295
1296         return 0;
1297 }
1298
1299 static struct kmem_cache * ufs_inode_cachep;
1300
1301 static struct inode *ufs_alloc_inode(struct super_block *sb)
1302 {
1303         struct ufs_inode_info *ei;
1304         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1305         if (!ei)
1306                 return NULL;
1307         ei->vfs_inode.i_version = 1;
1308         return &ei->vfs_inode;
1309 }
1310
1311 static void ufs_destroy_inode(struct inode *inode)
1312 {
1313         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1314 }
1315
1316 static void init_once(void *foo)
1317 {
1318         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1319
1320         inode_init_once(&ei->vfs_inode);
1321 }
1322
1323 static int init_inodecache(void)
1324 {
1325         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1326                                              sizeof(struct ufs_inode_info),
1327                                              0, (SLAB_RECLAIM_ACCOUNT|
1328                                                 SLAB_MEM_SPREAD),
1329                                              init_once);
1330         if (ufs_inode_cachep == NULL)
1331                 return -ENOMEM;
1332         return 0;
1333 }
1334
1335 static void destroy_inodecache(void)
1336 {
1337         kmem_cache_destroy(ufs_inode_cachep);
1338 }
1339
1340 #ifdef CONFIG_QUOTA
1341 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1342 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1343 #endif
1344
1345 static const struct super_operations ufs_super_ops = {
1346         .alloc_inode    = ufs_alloc_inode,
1347         .destroy_inode  = ufs_destroy_inode,
1348         .write_inode    = ufs_write_inode,
1349         .delete_inode   = ufs_delete_inode,
1350         .put_super      = ufs_put_super,
1351         .write_super    = ufs_write_super,
1352         .statfs         = ufs_statfs,
1353         .remount_fs     = ufs_remount,
1354         .show_options   = ufs_show_options,
1355 #ifdef CONFIG_QUOTA
1356         .quota_read     = ufs_quota_read,
1357         .quota_write    = ufs_quota_write,
1358 #endif
1359 };
1360
1361 #ifdef CONFIG_QUOTA
1362
1363 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1364  * acquiring the locks... As quota files are never truncated and quota code
1365  * itself serializes the operations (and noone else should touch the files)
1366  * we don't have to be afraid of races */
1367 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1368                                size_t len, loff_t off)
1369 {
1370         struct inode *inode = sb_dqopt(sb)->files[type];
1371         sector_t blk = off >> sb->s_blocksize_bits;
1372         int err = 0;
1373         int offset = off & (sb->s_blocksize - 1);
1374         int tocopy;
1375         size_t toread;
1376         struct buffer_head *bh;
1377         loff_t i_size = i_size_read(inode);
1378
1379         if (off > i_size)
1380                 return 0;
1381         if (off+len > i_size)
1382                 len = i_size-off;
1383         toread = len;
1384         while (toread > 0) {
1385                 tocopy = sb->s_blocksize - offset < toread ?
1386                                 sb->s_blocksize - offset : toread;
1387
1388                 bh = ufs_bread(inode, blk, 0, &err);
1389                 if (err)
1390                         return err;
1391                 if (!bh)        /* A hole? */
1392                         memset(data, 0, tocopy);
1393                 else {
1394                         memcpy(data, bh->b_data+offset, tocopy);
1395                         brelse(bh);
1396                 }
1397                 offset = 0;
1398                 toread -= tocopy;
1399                 data += tocopy;
1400                 blk++;
1401         }
1402         return len;
1403 }
1404
1405 /* Write to quotafile */
1406 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1407                                 const char *data, size_t len, loff_t off)
1408 {
1409         struct inode *inode = sb_dqopt(sb)->files[type];
1410         sector_t blk = off >> sb->s_blocksize_bits;
1411         int err = 0;
1412         int offset = off & (sb->s_blocksize - 1);
1413         int tocopy;
1414         size_t towrite = len;
1415         struct buffer_head *bh;
1416
1417         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1418         while (towrite > 0) {
1419                 tocopy = sb->s_blocksize - offset < towrite ?
1420                                 sb->s_blocksize - offset : towrite;
1421
1422                 bh = ufs_bread(inode, blk, 1, &err);
1423                 if (!bh)
1424                         goto out;
1425                 lock_buffer(bh);
1426                 memcpy(bh->b_data+offset, data, tocopy);
1427                 flush_dcache_page(bh->b_page);
1428                 set_buffer_uptodate(bh);
1429                 mark_buffer_dirty(bh);
1430                 unlock_buffer(bh);
1431                 brelse(bh);
1432                 offset = 0;
1433                 towrite -= tocopy;
1434                 data += tocopy;
1435                 blk++;
1436         }
1437 out:
1438         if (len == towrite) {
1439                 mutex_unlock(&inode->i_mutex);
1440                 return err;
1441         }
1442         if (inode->i_size < off+len-towrite)
1443                 i_size_write(inode, off+len-towrite);
1444         inode->i_version++;
1445         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1446         mark_inode_dirty(inode);
1447         mutex_unlock(&inode->i_mutex);
1448         return len - towrite;
1449 }
1450
1451 #endif
1452
1453 static int ufs_get_sb(struct file_system_type *fs_type,
1454         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1455 {
1456         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1457 }
1458
1459 static struct file_system_type ufs_fs_type = {
1460         .owner          = THIS_MODULE,
1461         .name           = "ufs",
1462         .get_sb         = ufs_get_sb,
1463         .kill_sb        = kill_block_super,
1464         .fs_flags       = FS_REQUIRES_DEV,
1465 };
1466
1467 static int __init init_ufs_fs(void)
1468 {
1469         int err = init_inodecache();
1470         if (err)
1471                 goto out1;
1472         err = register_filesystem(&ufs_fs_type);
1473         if (err)
1474                 goto out;
1475         return 0;
1476 out:
1477         destroy_inodecache();
1478 out1:
1479         return err;
1480 }
1481
1482 static void __exit exit_ufs_fs(void)
1483 {
1484         unregister_filesystem(&ufs_fs_type);
1485         destroy_inodecache();
1486 }
1487
1488 module_init(init_ufs_fs)
1489 module_exit(exit_ufs_fs)
1490 MODULE_LICENSE("GPL");