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