Pull release into acpica branch
[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  */
65
66
67 #include <linux/config.h>
68 #include <linux/module.h>
69 #include <linux/bitops.h>
70
71 #include <stdarg.h>
72
73 #include <asm/uaccess.h>
74 #include <asm/system.h>
75
76 #include <linux/errno.h>
77 #include <linux/fs.h>
78 #include <linux/ufs_fs.h>
79 #include <linux/slab.h>
80 #include <linux/time.h>
81 #include <linux/stat.h>
82 #include <linux/string.h>
83 #include <linux/blkdev.h>
84 #include <linux/init.h>
85 #include <linux/parser.h>
86 #include <linux/smp_lock.h>
87 #include <linux/buffer_head.h>
88 #include <linux/vfs.h>
89
90 #include "swab.h"
91 #include "util.h"
92
93 #undef UFS_SUPER_DEBUG
94 #undef UFS_SUPER_DEBUG_MORE
95
96
97 #undef UFS_SUPER_DEBUG_MORE
98 #ifdef UFS_SUPER_DEBUG
99 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
100 #else
101 #define UFSD(x)
102 #endif
103
104 #ifdef UFS_SUPER_DEBUG_MORE
105 /*
106  * Print contents of ufs_super_block, useful for debugging
107  */
108 void ufs_print_super_stuff(struct super_block *sb,
109         struct ufs_super_block_first * usb1,
110         struct ufs_super_block_second * usb2, 
111         struct ufs_super_block_third * usb3)
112 {
113         printk("ufs_print_super_stuff\n");
114         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
115         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
116         printk("  sblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
117         printk("  cblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
118         printk("  iblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
119         printk("  dblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
120         printk("  cgoffset:      %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
121         printk("  ~cgmask:       0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
122         printk("  size:          %u\n", fs32_to_cpu(sb, usb1->fs_size));
123         printk("  dsize:         %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
124         printk("  ncg:           %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
125         printk("  bsize:         %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
126         printk("  fsize:         %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
127         printk("  frag:          %u\n", fs32_to_cpu(sb, usb1->fs_frag));
128         printk("  fragshift:     %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
129         printk("  ~fmask:        %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
130         printk("  fshift:        %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
131         printk("  sbsize:        %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
132         printk("  spc:           %u\n", fs32_to_cpu(sb, usb1->fs_spc));
133         printk("  cpg:           %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
134         printk("  ipg:           %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
135         printk("  fpg:           %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
136         printk("  csaddr:        %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
137         printk("  cssize:        %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
138         printk("  cgsize:        %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
139         printk("  fstodb:        %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
140         printk("  contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
141         printk("  postblformat:  %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
142         printk("  nrpos:         %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
143         printk("  ndir           %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
144         printk("  nifree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
145         printk("  nbfree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
146         printk("  nffree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
147         printk("\n");
148 }
149
150 /*
151  * Print contents of ufs2 ufs_super_block, useful for debugging
152  */
153 void ufs2_print_super_stuff(
154      struct super_block *sb,
155       struct ufs_super_block *usb)
156 {
157         printk("ufs_print_super_stuff\n");
158         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
159         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb->fs_magic));
160         printk("  fs_size:   %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size));
161         printk("  fs_dsize:  %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize));
162         printk("  bsize:         %u\n", fs32_to_cpu(usb, usb->fs_bsize));
163         printk("  fsize:         %u\n", fs32_to_cpu(usb, usb->fs_fsize));
164         printk("  fs_volname:  %s\n", usb->fs_u11.fs_u2.fs_volname);
165         printk("  fs_fsmnt:  %s\n", usb->fs_u11.fs_u2.fs_fsmnt);
166         printk("  fs_sblockloc: %u\n",fs64_to_cpu(sb,
167                         usb->fs_u11.fs_u2.fs_sblockloc));
168         printk("  cs_ndir(No of dirs):  %u\n",fs64_to_cpu(sb,
169                         usb->fs_u11.fs_u2.fs_cstotal.cs_ndir));
170         printk("  cs_nbfree(No of free blocks):  %u\n",fs64_to_cpu(sb,
171                         usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree));
172         printk("\n");
173 }
174
175 /*
176  * Print contents of ufs_cylinder_group, useful for debugging
177  */
178 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
179 {
180         printk("\nufs_print_cylinder_stuff\n");
181         printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
182         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
183         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
184         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
185         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
186         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
187         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
188         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
189         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
190         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
191         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
192         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
193         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
194         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
195         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
196             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
197             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
198             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
199             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
200         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
201         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
202         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
203         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
204         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
205         printk("  clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
206         printk("  clusteroff    %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
207         printk("  nclusterblks  %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
208         printk("\n");
209 }
210 #endif /* UFS_SUPER_DEBUG_MORE */
211
212 static struct super_operations ufs_super_ops;
213
214 static char error_buf[1024];
215
216 void ufs_error (struct super_block * sb, const char * function,
217         const char * fmt, ...)
218 {
219         struct ufs_sb_private_info * uspi;
220         struct ufs_super_block_first * usb1;
221         va_list args;
222
223         uspi = UFS_SB(sb)->s_uspi;
224         usb1 = ubh_get_usb_first(uspi);
225         
226         if (!(sb->s_flags & MS_RDONLY)) {
227                 usb1->fs_clean = UFS_FSBAD;
228                 ubh_mark_buffer_dirty(USPI_UBH);
229                 sb->s_dirt = 1;
230                 sb->s_flags |= MS_RDONLY;
231         }
232         va_start (args, fmt);
233         vsprintf (error_buf, fmt, args);
234         va_end (args);
235         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
236         case UFS_MOUNT_ONERROR_PANIC:
237                 panic ("UFS-fs panic (device %s): %s: %s\n", 
238                         sb->s_id, function, error_buf);
239
240         case UFS_MOUNT_ONERROR_LOCK:
241         case UFS_MOUNT_ONERROR_UMOUNT:
242         case UFS_MOUNT_ONERROR_REPAIR:
243                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
244                         sb->s_id, function, error_buf);
245         }               
246 }
247
248 void ufs_panic (struct super_block * sb, const char * function,
249         const char * fmt, ...)
250 {
251         struct ufs_sb_private_info * uspi;
252         struct ufs_super_block_first * usb1;
253         va_list args;
254         
255         uspi = UFS_SB(sb)->s_uspi;
256         usb1 = ubh_get_usb_first(uspi);
257         
258         if (!(sb->s_flags & MS_RDONLY)) {
259                 usb1->fs_clean = UFS_FSBAD;
260                 ubh_mark_buffer_dirty(USPI_UBH);
261                 sb->s_dirt = 1;
262         }
263         va_start (args, fmt);
264         vsprintf (error_buf, fmt, args);
265         va_end (args);
266         sb->s_flags |= MS_RDONLY;
267         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
268                 sb->s_id, function, error_buf);
269 }
270
271 void ufs_warning (struct super_block * sb, const char * function,
272         const char * fmt, ...)
273 {
274         va_list args;
275
276         va_start (args, fmt);
277         vsprintf (error_buf, fmt, args);
278         va_end (args);
279         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
280                 sb->s_id, function, error_buf);
281 }
282
283 enum {
284         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
285         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
286         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
287         Opt_onerror_umount, Opt_onerror_repair, Opt_err
288 };
289
290 static match_table_t tokens = {
291         {Opt_type_old, "ufstype=old"},
292         {Opt_type_sunx86, "ufstype=sunx86"},
293         {Opt_type_sun, "ufstype=sun"},
294         {Opt_type_44bsd, "ufstype=44bsd"},
295         {Opt_type_ufs2, "ufstype=ufs2"},
296         {Opt_type_ufs2, "ufstype=5xbsd"},
297         {Opt_type_hp, "ufstype=hp"},
298         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
299         {Opt_type_nextstep, "ufstype=nextstep"},
300         {Opt_type_openstep, "ufstype=openstep"},
301         {Opt_onerror_panic, "onerror=panic"},
302         {Opt_onerror_lock, "onerror=lock"},
303         {Opt_onerror_umount, "onerror=umount"},
304         {Opt_onerror_repair, "onerror=repair"},
305         {Opt_err, NULL}
306 };
307
308 static int ufs_parse_options (char * options, unsigned * mount_options)
309 {
310         char * p;
311         
312         UFSD(("ENTER\n"))
313         
314         if (!options)
315                 return 1;
316
317         while ((p = strsep(&options, ",")) != NULL) {
318                 substring_t args[MAX_OPT_ARGS];
319                 int token;
320                 if (!*p)
321                         continue;
322
323                 token = match_token(p, tokens, args);
324                 switch (token) {
325                 case Opt_type_old:
326                         ufs_clear_opt (*mount_options, UFSTYPE);
327                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
328                         break;
329                 case Opt_type_sunx86:
330                         ufs_clear_opt (*mount_options, UFSTYPE);
331                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
332                         break;
333                 case Opt_type_sun:
334                         ufs_clear_opt (*mount_options, UFSTYPE);
335                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
336                         break;
337                 case Opt_type_44bsd:
338                         ufs_clear_opt (*mount_options, UFSTYPE);
339                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
340                         break;
341                 case Opt_type_ufs2:
342                         ufs_clear_opt(*mount_options, UFSTYPE);
343                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
344                         break;
345                 case Opt_type_hp:
346                         ufs_clear_opt (*mount_options, UFSTYPE);
347                         ufs_set_opt (*mount_options, UFSTYPE_HP);
348                         break;
349                 case Opt_type_nextstepcd:
350                         ufs_clear_opt (*mount_options, UFSTYPE);
351                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
352                         break;
353                 case Opt_type_nextstep:
354                         ufs_clear_opt (*mount_options, UFSTYPE);
355                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
356                         break;
357                 case Opt_type_openstep:
358                         ufs_clear_opt (*mount_options, UFSTYPE);
359                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
360                         break;
361                 case Opt_onerror_panic:
362                         ufs_clear_opt (*mount_options, ONERROR);
363                         ufs_set_opt (*mount_options, ONERROR_PANIC);
364                         break;
365                 case Opt_onerror_lock:
366                         ufs_clear_opt (*mount_options, ONERROR);
367                         ufs_set_opt (*mount_options, ONERROR_LOCK);
368                         break;
369                 case Opt_onerror_umount:
370                         ufs_clear_opt (*mount_options, ONERROR);
371                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
372                         break;
373                 case Opt_onerror_repair:
374                         printk("UFS-fs: Unable to do repair on error, "
375                                 "will lock lock instead\n");
376                         ufs_clear_opt (*mount_options, ONERROR);
377                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
378                         break;
379                 default:
380                         printk("UFS-fs: Invalid option: \"%s\" "
381                                         "or missing value\n", p);
382                         return 0;
383                 }
384         }
385         return 1;
386 }
387
388 /*
389  * Read on-disk structures associated with cylinder groups
390  */
391 static int ufs_read_cylinder_structures (struct super_block *sb) {
392         struct ufs_sb_info * sbi = UFS_SB(sb);
393         struct ufs_sb_private_info * uspi;
394         struct ufs_super_block *usb;
395         struct ufs_buffer_head * ubh;
396         unsigned char * base, * space;
397         unsigned size, blks, i;
398         unsigned flags = 0;
399         
400         UFSD(("ENTER\n"))
401         
402         uspi = sbi->s_uspi;
403
404         usb  = (struct ufs_super_block *)
405                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
406
407         flags = UFS_SB(sb)->s_flags;
408         
409         /*
410          * Read cs structures from (usually) first data block
411          * on the device. 
412          */
413         size = uspi->s_cssize;
414         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
415         base = space = kmalloc(size, GFP_KERNEL);
416         if (!base)
417                 goto failed; 
418         for (i = 0; i < blks; i += uspi->s_fpb) {
419                 size = uspi->s_bsize;
420                 if (i + uspi->s_fpb > blks)
421                         size = (blks - i) * uspi->s_fsize;
422
423                 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 
424                         ubh = ubh_bread(sb,
425                                 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
426                 else 
427                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
428                 
429                 if (!ubh)
430                         goto failed;
431
432                 ubh_ubhcpymem (space, ubh, size);
433                 sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
434
435                 space += size;
436                 ubh_brelse (ubh);
437                 ubh = NULL;
438         }
439
440         /*
441          * Read cylinder group (we read only first fragment from block
442          * at this time) and prepare internal data structures for cg caching.
443          */
444         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
445                 goto failed;
446         for (i = 0; i < uspi->s_ncg; i++) 
447                 sbi->s_ucg[i] = NULL;
448         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
449                 sbi->s_ucpi[i] = NULL;
450                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
451         }
452         for (i = 0; i < uspi->s_ncg; i++) {
453                 UFSD(("read cg %u\n", i))
454                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
455                         goto failed;
456                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
457                         goto failed;
458 #ifdef UFS_SUPER_DEBUG_MORE
459                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
460 #endif
461         }
462         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
463                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
464                         goto failed;
465                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
466         }
467         sbi->s_cg_loaded = 0;
468         UFSD(("EXIT\n"))
469         return 1;
470
471 failed:
472         kfree (base);
473         if (sbi->s_ucg) {
474                 for (i = 0; i < uspi->s_ncg; i++)
475                         if (sbi->s_ucg[i])
476                                 brelse (sbi->s_ucg[i]);
477                 kfree (sbi->s_ucg);
478                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
479                         kfree (sbi->s_ucpi[i]);
480         }
481         UFSD(("EXIT (FAILED)\n"))
482         return 0;
483 }
484
485 /*
486  * Put on-disk structures associated with cylinder groups and 
487  * write them back to disk
488  */
489 static void ufs_put_cylinder_structures (struct super_block *sb) {
490         struct ufs_sb_info * sbi = UFS_SB(sb);
491         struct ufs_sb_private_info * uspi;
492         struct ufs_buffer_head * ubh;
493         unsigned char * base, * space;
494         unsigned blks, size, i;
495         
496         UFSD(("ENTER\n"))
497         
498         uspi = sbi->s_uspi;
499
500         size = uspi->s_cssize;
501         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
502         base = space = (char*) sbi->s_csp[0];
503         for (i = 0; i < blks; i += uspi->s_fpb) {
504                 size = uspi->s_bsize;
505                 if (i + uspi->s_fpb > blks)
506                         size = (blks - i) * uspi->s_fsize;
507                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
508                 ubh_memcpyubh (ubh, space, size);
509                 space += size;
510                 ubh_mark_buffer_uptodate (ubh, 1);
511                 ubh_mark_buffer_dirty (ubh);
512                 ubh_brelse (ubh);
513         }
514         for (i = 0; i < sbi->s_cg_loaded; i++) {
515                 ufs_put_cylinder (sb, i);
516                 kfree (sbi->s_ucpi[i]);
517         }
518         for (; i < UFS_MAX_GROUP_LOADED; i++) 
519                 kfree (sbi->s_ucpi[i]);
520         for (i = 0; i < uspi->s_ncg; i++) 
521                 brelse (sbi->s_ucg[i]);
522         kfree (sbi->s_ucg);
523         kfree (base);
524         UFSD(("EXIT\n"))
525 }
526
527 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
528 {
529         struct ufs_sb_info * sbi;
530         struct ufs_sb_private_info * uspi;
531         struct ufs_super_block_first * usb1;
532         struct ufs_super_block_second * usb2;
533         struct ufs_super_block_third * usb3;
534         struct ufs_super_block *usb;
535         struct ufs_buffer_head * ubh;   
536         struct inode *inode;
537         unsigned block_size, super_block_size;
538         unsigned flags;
539         unsigned super_block_offset;
540
541         uspi = NULL;
542         ubh = NULL;
543         flags = 0;
544         
545         UFSD(("ENTER\n"))
546                 
547         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
548         if (!sbi)
549                 goto failed_nomem;
550         sb->s_fs_info = sbi;
551         memset(sbi, 0, sizeof(struct ufs_sb_info));
552
553         UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
554         
555 #ifndef CONFIG_UFS_FS_WRITE
556         if (!(sb->s_flags & MS_RDONLY)) {
557                 printk("ufs was compiled with read-only support, "
558                 "can't be mounted as read-write\n");
559                 goto failed;
560         }
561 #endif
562         /*
563          * Set default mount options
564          * Parse mount options
565          */
566         sbi->s_mount_opt = 0;
567         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
568         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
569                 printk("wrong mount options\n");
570                 goto failed;
571         }
572         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
573                 if (!silent)
574                         printk("You didn't specify the type of your ufs filesystem\n\n"
575                         "mount -t ufs -o ufstype="
576                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
577                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
578                         "default is ufstype=old\n");
579                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
580         }
581
582         sbi->s_uspi = uspi =
583                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
584         if (!uspi)
585                 goto failed;
586
587         super_block_offset=UFS_SBLOCK;
588
589         /* Keep 2Gig file limit. Some UFS variants need to override 
590            this but as I don't know which I'll let those in the know loosen
591            the rules */
592         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
593         case UFS_MOUNT_UFSTYPE_44BSD:
594                 UFSD(("ufstype=44bsd\n"))
595                 uspi->s_fsize = block_size = 512;
596                 uspi->s_fmask = ~(512 - 1);
597                 uspi->s_fshift = 9;
598                 uspi->s_sbsize = super_block_size = 1536;
599                 uspi->s_sbbase = 0;
600                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
601                 break;
602         case UFS_MOUNT_UFSTYPE_UFS2:
603                 UFSD(("ufstype=ufs2\n"));
604                 super_block_offset=SBLOCK_UFS2;
605                 uspi->s_fsize = block_size = 512;
606                 uspi->s_fmask = ~(512 - 1);
607                 uspi->s_fshift = 9;
608                 uspi->s_sbsize = super_block_size = 1536;
609                 uspi->s_sbbase =  0;
610                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
611                 if (!(sb->s_flags & MS_RDONLY)) {
612                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
613                         sb->s_flags |= MS_RDONLY;
614                 }
615                 break;
616                 
617         case UFS_MOUNT_UFSTYPE_SUN:
618                 UFSD(("ufstype=sun\n"))
619                 uspi->s_fsize = block_size = 1024;
620                 uspi->s_fmask = ~(1024 - 1);
621                 uspi->s_fshift = 10;
622                 uspi->s_sbsize = super_block_size = 2048;
623                 uspi->s_sbbase = 0;
624                 uspi->s_maxsymlinklen = 56;
625                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
626                 break;
627
628         case UFS_MOUNT_UFSTYPE_SUNx86:
629                 UFSD(("ufstype=sunx86\n"))
630                 uspi->s_fsize = block_size = 1024;
631                 uspi->s_fmask = ~(1024 - 1);
632                 uspi->s_fshift = 10;
633                 uspi->s_sbsize = super_block_size = 2048;
634                 uspi->s_sbbase = 0;
635                 uspi->s_maxsymlinklen = 56;
636                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
637                 break;
638
639         case UFS_MOUNT_UFSTYPE_OLD:
640                 UFSD(("ufstype=old\n"))
641                 uspi->s_fsize = block_size = 1024;
642                 uspi->s_fmask = ~(1024 - 1);
643                 uspi->s_fshift = 10;
644                 uspi->s_sbsize = super_block_size = 2048;
645                 uspi->s_sbbase = 0;
646                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
647                 if (!(sb->s_flags & MS_RDONLY)) {
648                         if (!silent)
649                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
650                         sb->s_flags |= MS_RDONLY;
651                 }
652                 break;
653         
654         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
655                 UFSD(("ufstype=nextstep\n"))
656                 uspi->s_fsize = block_size = 1024;
657                 uspi->s_fmask = ~(1024 - 1);
658                 uspi->s_fshift = 10;
659                 uspi->s_sbsize = super_block_size = 2048;
660                 uspi->s_sbbase = 0;
661                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
662                 if (!(sb->s_flags & MS_RDONLY)) {
663                         if (!silent)
664                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
665                         sb->s_flags |= MS_RDONLY;
666                 }
667                 break;
668         
669         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
670                 UFSD(("ufstype=nextstep-cd\n"))
671                 uspi->s_fsize = block_size = 2048;
672                 uspi->s_fmask = ~(2048 - 1);
673                 uspi->s_fshift = 11;
674                 uspi->s_sbsize = super_block_size = 2048;
675                 uspi->s_sbbase = 0;
676                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
677                 if (!(sb->s_flags & MS_RDONLY)) {
678                         if (!silent)
679                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
680                         sb->s_flags |= MS_RDONLY;
681                 }
682                 break;
683         
684         case UFS_MOUNT_UFSTYPE_OPENSTEP:
685                 UFSD(("ufstype=openstep\n"))
686                 uspi->s_fsize = block_size = 1024;
687                 uspi->s_fmask = ~(1024 - 1);
688                 uspi->s_fshift = 10;
689                 uspi->s_sbsize = super_block_size = 2048;
690                 uspi->s_sbbase = 0;
691                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
692                 if (!(sb->s_flags & MS_RDONLY)) {
693                         if (!silent)
694                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
695                         sb->s_flags |= MS_RDONLY;
696                 }
697                 break;
698         
699         case UFS_MOUNT_UFSTYPE_HP:
700                 UFSD(("ufstype=hp\n"))
701                 uspi->s_fsize = block_size = 1024;
702                 uspi->s_fmask = ~(1024 - 1);
703                 uspi->s_fshift = 10;
704                 uspi->s_sbsize = super_block_size = 2048;
705                 uspi->s_sbbase = 0;
706                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
707                 if (!(sb->s_flags & MS_RDONLY)) {
708                         if (!silent)
709                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
710                         sb->s_flags |= MS_RDONLY;
711                 }
712                 break;
713         default:
714                 if (!silent)
715                         printk("unknown ufstype\n");
716                 goto failed;
717         }
718         
719 again:  
720         if (!sb_set_blocksize(sb, block_size)) {
721                 printk(KERN_ERR "UFS: failed to set blocksize\n");
722                 goto failed;
723         }
724
725         /*
726          * read ufs super block from device
727          */
728
729         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
730         
731         if (!ubh) 
732             goto failed;
733
734         
735         usb1 = ubh_get_usb_first(uspi);
736         usb2 = ubh_get_usb_second(uspi);
737         usb3 = ubh_get_usb_third(uspi);
738         usb  = (struct ufs_super_block *)
739                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
740
741         /*
742          * Check ufs magic number
743          */
744         sbi->s_bytesex = BYTESEX_LE;
745         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
746                 case UFS_MAGIC:
747                 case UFS2_MAGIC:
748                 case UFS_MAGIC_LFN:
749                 case UFS_MAGIC_FEA:
750                 case UFS_MAGIC_4GB:
751                         goto magic_found;
752         }
753         sbi->s_bytesex = BYTESEX_BE;
754         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
755                 case UFS_MAGIC:
756                 case UFS2_MAGIC:
757                 case UFS_MAGIC_LFN:
758                 case UFS_MAGIC_FEA:
759                 case UFS_MAGIC_4GB:
760                         goto magic_found;
761         }
762
763         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
764           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
765           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
766           && uspi->s_sbbase < 256) {
767                 ubh_brelse_uspi(uspi);
768                 ubh = NULL;
769                 uspi->s_sbbase += 8;
770                 goto again;
771         }
772         if (!silent)
773                 printk("ufs_read_super: bad magic number\n");
774         goto failed;
775
776 magic_found:
777         /*
778          * Check block and fragment sizes
779          */
780         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
781         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
782         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
783         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
784         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
785
786         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
787                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
788                         uspi->s_fsize);
789                         goto failed;
790         }
791         if (uspi->s_fsize < 512) {
792                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
793                         uspi->s_fsize);
794                 goto failed;
795         }
796         if (uspi->s_fsize > 4096) {
797                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
798                         uspi->s_fsize);
799                 goto failed;
800         }
801         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
802                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
803                         uspi->s_bsize);
804                 goto failed;
805         }
806         if (uspi->s_bsize < 4096) {
807                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
808                         uspi->s_bsize);
809                 goto failed;
810         }
811         if (uspi->s_bsize / uspi->s_fsize > 8) {
812                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
813                         uspi->s_bsize / uspi->s_fsize);
814                 goto failed;
815         }
816         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
817                 ubh_brelse_uspi(uspi);
818                 ubh = NULL;
819                 block_size = uspi->s_fsize;
820                 super_block_size = uspi->s_sbsize;
821                 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
822                 goto again;
823         }
824
825 #ifdef UFS_SUPER_DEBUG_MORE
826         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
827                 ufs2_print_super_stuff(sb,usb);
828         else
829                 ufs_print_super_stuff(sb, usb1, usb2, usb3);
830 #endif
831
832         /*
833          * Check, if file system was correctly unmounted.
834          * If not, make it read only.
835          */
836         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
837           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
838           (((flags & UFS_ST_MASK) == UFS_ST_SUN || 
839           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 
840           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
841                 switch(usb1->fs_clean) {
842                 case UFS_FSCLEAN:
843                         UFSD(("fs is clean\n"))
844                         break;
845                 case UFS_FSSTABLE:
846                         UFSD(("fs is stable\n"))
847                         break;
848                 case UFS_FSOSF1:
849                         UFSD(("fs is DEC OSF/1\n"))
850                         break;
851                 case UFS_FSACTIVE:
852                         printk("ufs_read_super: fs is active\n");
853                         sb->s_flags |= MS_RDONLY;
854                         break;
855                 case UFS_FSBAD:
856                         printk("ufs_read_super: fs is bad\n");
857                         sb->s_flags |= MS_RDONLY;
858                         break;
859                 default:
860                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
861                         sb->s_flags |= MS_RDONLY;
862                         break;
863                 }
864         }
865         else {
866                 printk("ufs_read_super: fs needs fsck\n");
867                 sb->s_flags |= MS_RDONLY;
868         }
869
870         /*
871          * Read ufs_super_block into internal data structures
872          */
873         sb->s_op = &ufs_super_ops;
874         sb->dq_op = NULL; /***/
875         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
876
877         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
878         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
879         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
880         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
881         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
882         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
883
884         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
885                 uspi->s_u2_size  = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
886                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
887         }
888         else {
889                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
890                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
891         }
892
893         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
894         /* s_bsize already set */
895         /* s_fsize already set */
896         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
897         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
898         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
899         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
900         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
901         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
902         UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
903                 uspi->s_fshift));
904         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
905         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
906         /* s_sbsize already set */
907         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
908         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
909         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
910         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
911         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
912         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
913         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
914         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
915         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
916         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
917         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
918         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
919         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
920         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
921         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
922         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
923         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
924         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
925         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
926         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
927         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
928         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
929         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
930         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
931
932         /*
933          * Compute another frequently used values
934          */
935         uspi->s_fpbmask = uspi->s_fpb - 1;
936         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
937                 uspi->s_apbshift = uspi->s_bshift - 3;
938         }
939         else {
940                 uspi->s_apbshift = uspi->s_bshift - 2;
941         }
942         uspi->s_2apbshift = uspi->s_apbshift * 2;
943         uspi->s_3apbshift = uspi->s_apbshift * 3;
944         uspi->s_apb = 1 << uspi->s_apbshift;
945         uspi->s_2apb = 1 << uspi->s_2apbshift;
946         uspi->s_3apb = 1 << uspi->s_3apbshift;
947         uspi->s_apbmask = uspi->s_apb - 1;
948         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
949         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
950         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
951         uspi->s_bpf = uspi->s_fsize << 3;
952         uspi->s_bpfshift = uspi->s_fshift + 3;
953         uspi->s_bpfmask = uspi->s_bpf - 1;
954         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
955             UFS_MOUNT_UFSTYPE_44BSD)
956                 uspi->s_maxsymlinklen =
957                     fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
958         
959         sbi->s_flags = flags;
960
961         inode = iget(sb, UFS_ROOTINO);
962         if (!inode || is_bad_inode(inode))
963                 goto failed;
964         sb->s_root = d_alloc_root(inode);
965         if (!sb->s_root)
966                 goto dalloc_failed;
967
968
969         /*
970          * Read cylinder group structures
971          */
972         if (!(sb->s_flags & MS_RDONLY))
973                 if (!ufs_read_cylinder_structures(sb))
974                         goto failed;
975
976         UFSD(("EXIT\n"))
977         return 0;
978
979 dalloc_failed:
980         iput(inode);
981 failed:
982         if (ubh)
983                 ubh_brelse_uspi (uspi);
984         kfree (uspi);
985         kfree(sbi);
986         sb->s_fs_info = NULL;
987         UFSD(("EXIT (FAILED)\n"))
988         return -EINVAL;
989
990 failed_nomem:
991         UFSD(("EXIT (NOMEM)\n"))
992         return -ENOMEM;
993 }
994
995 static void ufs_write_super (struct super_block *sb) {
996         struct ufs_sb_private_info * uspi;
997         struct ufs_super_block_first * usb1;
998         struct ufs_super_block_third * usb3;
999         unsigned flags;
1000
1001         lock_kernel();
1002
1003         UFSD(("ENTER\n"))
1004         flags = UFS_SB(sb)->s_flags;
1005         uspi = UFS_SB(sb)->s_uspi;
1006         usb1 = ubh_get_usb_first(uspi);
1007         usb3 = ubh_get_usb_third(uspi);
1008
1009         if (!(sb->s_flags & MS_RDONLY)) {
1010                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1011                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
1012                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1013                         ufs_set_fs_state(sb, usb1, usb3,
1014                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1015                 ubh_mark_buffer_dirty (USPI_UBH);
1016         }
1017         sb->s_dirt = 0;
1018         UFSD(("EXIT\n"))
1019         unlock_kernel();
1020 }
1021
1022 static void ufs_put_super (struct super_block *sb)
1023 {
1024         struct ufs_sb_info * sbi = UFS_SB(sb);
1025                 
1026         UFSD(("ENTER\n"))
1027
1028         if (!(sb->s_flags & MS_RDONLY))
1029                 ufs_put_cylinder_structures (sb);
1030         
1031         ubh_brelse_uspi (sbi->s_uspi);
1032         kfree (sbi->s_uspi);
1033         kfree (sbi);
1034         sb->s_fs_info = NULL;
1035         return;
1036 }
1037
1038
1039 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1040 {
1041         struct ufs_sb_private_info * uspi;
1042         struct ufs_super_block_first * usb1;
1043         struct ufs_super_block_third * usb3;
1044         unsigned new_mount_opt, ufstype;
1045         unsigned flags;
1046         
1047         uspi = UFS_SB(sb)->s_uspi;
1048         flags = UFS_SB(sb)->s_flags;
1049         usb1 = ubh_get_usb_first(uspi);
1050         usb3 = ubh_get_usb_third(uspi);
1051         
1052         /*
1053          * Allow the "check" option to be passed as a remount option.
1054          * It is not possible to change ufstype option during remount
1055          */
1056         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1057         new_mount_opt = 0;
1058         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1059         if (!ufs_parse_options (data, &new_mount_opt))
1060                 return -EINVAL;
1061         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1062                 new_mount_opt |= ufstype;
1063         }
1064         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1065                 printk("ufstype can't be changed during remount\n");
1066                 return -EINVAL;
1067         }
1068
1069         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1070                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1071                 return 0;
1072         }
1073         
1074         /*
1075          * fs was mouted as rw, remounting ro
1076          */
1077         if (*mount_flags & MS_RDONLY) {
1078                 ufs_put_cylinder_structures(sb);
1079                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1080                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1081                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1082                         ufs_set_fs_state(sb, usb1, usb3,
1083                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1084                 ubh_mark_buffer_dirty (USPI_UBH);
1085                 sb->s_dirt = 0;
1086                 sb->s_flags |= MS_RDONLY;
1087         }
1088         /*
1089          * fs was mounted as ro, remounting rw
1090          */
1091         else {
1092 #ifndef CONFIG_UFS_FS_WRITE
1093                 printk("ufs was compiled with read-only support, "
1094                 "can't be mounted as read-write\n");
1095                 return -EINVAL;
1096 #else
1097                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1098                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1099                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1100                         printk("this ufstype is read-only supported\n");
1101                         return -EINVAL;
1102                 }
1103                 if (!ufs_read_cylinder_structures (sb)) {
1104                         printk("failed during remounting\n");
1105                         return -EPERM;
1106                 }
1107                 sb->s_flags &= ~MS_RDONLY;
1108 #endif
1109         }
1110         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1111         return 0;
1112 }
1113
1114 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
1115 {
1116         struct ufs_sb_private_info * uspi;
1117         struct ufs_super_block_first * usb1;
1118         struct ufs_super_block * usb;
1119         unsigned  flags = 0;
1120
1121         lock_kernel();
1122
1123         uspi = UFS_SB(sb)->s_uspi;
1124         usb1 = ubh_get_usb_first (uspi);
1125         usb  = (struct ufs_super_block *)
1126                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1127         
1128         flags = UFS_SB(sb)->s_flags;
1129         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1130                 buf->f_type = UFS2_MAGIC;
1131                 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1132                 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1133                         fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1134                 buf->f_ffree = fs64_to_cpu(sb,
1135                         usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1136         }
1137         else {
1138                 buf->f_type = UFS_MAGIC;
1139                 buf->f_blocks = uspi->s_dsize;
1140                 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1141                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1142                 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1143         }
1144         buf->f_bsize = sb->s_blocksize;
1145         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1146                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1147         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1148         buf->f_namelen = UFS_MAXNAMLEN;
1149
1150         unlock_kernel();
1151
1152         return 0;
1153 }
1154
1155 static kmem_cache_t * ufs_inode_cachep;
1156
1157 static struct inode *ufs_alloc_inode(struct super_block *sb)
1158 {
1159         struct ufs_inode_info *ei;
1160         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1161         if (!ei)
1162                 return NULL;
1163         ei->vfs_inode.i_version = 1;
1164         return &ei->vfs_inode;
1165 }
1166
1167 static void ufs_destroy_inode(struct inode *inode)
1168 {
1169         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1170 }
1171
1172 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1173 {
1174         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1175
1176         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1177             SLAB_CTOR_CONSTRUCTOR)
1178                 inode_init_once(&ei->vfs_inode);
1179 }
1180  
1181 static int init_inodecache(void)
1182 {
1183         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1184                                              sizeof(struct ufs_inode_info),
1185                                              0, SLAB_RECLAIM_ACCOUNT,
1186                                              init_once, NULL);
1187         if (ufs_inode_cachep == NULL)
1188                 return -ENOMEM;
1189         return 0;
1190 }
1191
1192 static void destroy_inodecache(void)
1193 {
1194         if (kmem_cache_destroy(ufs_inode_cachep))
1195                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1196 }
1197
1198 #ifdef CONFIG_QUOTA
1199 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1200 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1201 #endif
1202
1203 static struct super_operations ufs_super_ops = {
1204         .alloc_inode    = ufs_alloc_inode,
1205         .destroy_inode  = ufs_destroy_inode,
1206         .read_inode     = ufs_read_inode,
1207         .write_inode    = ufs_write_inode,
1208         .delete_inode   = ufs_delete_inode,
1209         .put_super      = ufs_put_super,
1210         .write_super    = ufs_write_super,
1211         .statfs         = ufs_statfs,
1212         .remount_fs     = ufs_remount,
1213 #ifdef CONFIG_QUOTA
1214         .quota_read     = ufs_quota_read,
1215         .quota_write    = ufs_quota_write,
1216 #endif
1217 };
1218
1219 #ifdef CONFIG_QUOTA
1220
1221 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1222  * acquiring the locks... As quota files are never truncated and quota code
1223  * itself serializes the operations (and noone else should touch the files)
1224  * we don't have to be afraid of races */
1225 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1226                                size_t len, loff_t off)
1227 {
1228         struct inode *inode = sb_dqopt(sb)->files[type];
1229         sector_t blk = off >> sb->s_blocksize_bits;
1230         int err = 0;
1231         int offset = off & (sb->s_blocksize - 1);
1232         int tocopy;
1233         size_t toread;
1234         struct buffer_head *bh;
1235         loff_t i_size = i_size_read(inode);
1236
1237         if (off > i_size)
1238                 return 0;
1239         if (off+len > i_size)
1240                 len = i_size-off;
1241         toread = len;
1242         while (toread > 0) {
1243                 tocopy = sb->s_blocksize - offset < toread ?
1244                                 sb->s_blocksize - offset : toread;
1245
1246                 bh = ufs_bread(inode, blk, 0, &err);
1247                 if (err)
1248                         return err;
1249                 if (!bh)        /* A hole? */
1250                         memset(data, 0, tocopy);
1251                 else {
1252                         memcpy(data, bh->b_data+offset, tocopy);
1253                         brelse(bh);
1254                 }
1255                 offset = 0;
1256                 toread -= tocopy;
1257                 data += tocopy;
1258                 blk++;
1259         }
1260         return len;
1261 }
1262
1263 /* Write to quotafile */
1264 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1265                                 const char *data, size_t len, loff_t off)
1266 {
1267         struct inode *inode = sb_dqopt(sb)->files[type];
1268         sector_t blk = off >> sb->s_blocksize_bits;
1269         int err = 0;
1270         int offset = off & (sb->s_blocksize - 1);
1271         int tocopy;
1272         size_t towrite = len;
1273         struct buffer_head *bh;
1274
1275         mutex_lock(&inode->i_mutex);
1276         while (towrite > 0) {
1277                 tocopy = sb->s_blocksize - offset < towrite ?
1278                                 sb->s_blocksize - offset : towrite;
1279
1280                 bh = ufs_bread(inode, blk, 1, &err);
1281                 if (!bh)
1282                         goto out;
1283                 lock_buffer(bh);
1284                 memcpy(bh->b_data+offset, data, tocopy);
1285                 flush_dcache_page(bh->b_page);
1286                 set_buffer_uptodate(bh);
1287                 mark_buffer_dirty(bh);
1288                 unlock_buffer(bh);
1289                 brelse(bh);
1290                 offset = 0;
1291                 towrite -= tocopy;
1292                 data += tocopy;
1293                 blk++;
1294         }
1295 out:
1296         if (len == towrite) {
1297                 mutex_unlock(&inode->i_mutex);
1298                 return err;
1299         }
1300         if (inode->i_size < off+len-towrite)
1301                 i_size_write(inode, off+len-towrite);
1302         inode->i_version++;
1303         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1304         mark_inode_dirty(inode);
1305         mutex_unlock(&inode->i_mutex);
1306         return len - towrite;
1307 }
1308
1309 #endif
1310
1311 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1312         int flags, const char *dev_name, void *data)
1313 {
1314         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1315 }
1316
1317 static struct file_system_type ufs_fs_type = {
1318         .owner          = THIS_MODULE,
1319         .name           = "ufs",
1320         .get_sb         = ufs_get_sb,
1321         .kill_sb        = kill_block_super,
1322         .fs_flags       = FS_REQUIRES_DEV,
1323 };
1324
1325 static int __init init_ufs_fs(void)
1326 {
1327         int err = init_inodecache();
1328         if (err)
1329                 goto out1;
1330         err = register_filesystem(&ufs_fs_type);
1331         if (err)
1332                 goto out;
1333         return 0;
1334 out:
1335         destroy_inodecache();
1336 out1:
1337         return err;
1338 }
1339
1340 static void __exit exit_ufs_fs(void)
1341 {
1342         unregister_filesystem(&ufs_fs_type);
1343         destroy_inodecache();
1344 }
1345
1346 module_init(init_ufs_fs)
1347 module_exit(exit_ufs_fs)
1348 MODULE_LICENSE("GPL");