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