[PATCH] ufs: directory and page cache: from blocks to pages
[linux-2.6.git] / fs / ufs / super.c
1 /*
2  *  linux/fs/ufs/super.c
3  *
4  * Copyright (C) 1998
5  * Daniel Pirkl <daniel.pirkl@email.cz>
6  * Charles University, Faculty of Mathematics and Physics
7  */
8
9 /* Derived from
10  *
11  *  linux/fs/ext2/super.c
12  *
13  * Copyright (C) 1992, 1993, 1994, 1995
14  * Remy Card (card@masi.ibp.fr)
15  * Laboratoire MASI - Institut Blaise Pascal
16  * Universite Pierre et Marie Curie (Paris VI)
17  *
18  *  from
19  *
20  *  linux/fs/minix/inode.c
21  *
22  *  Copyright (C) 1991, 1992  Linus Torvalds
23  *
24  *  Big-endian to little-endian byte-swapping/bitmaps by
25  *        David S. Miller (davem@caip.rutgers.edu), 1995
26  */
27  
28 /*
29  * Inspired by
30  *
31  *  linux/fs/ufs/super.c
32  *
33  * Copyright (C) 1996
34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
35  * Laboratory for Computer Science Research Computing Facility
36  * Rutgers, The State University of New Jersey
37  *
38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
39  *
40  * Kernel module support added on 96/04/26 by
41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
42  *
43  * Module usage counts added on 96/04/29 by
44  * Gertjan van Wingerde <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 {
393         struct ufs_sb_info * sbi = UFS_SB(sb);
394         struct ufs_sb_private_info * uspi;
395         struct ufs_super_block *usb;
396         struct ufs_buffer_head * ubh;
397         unsigned char * base, * space;
398         unsigned size, blks, i;
399         unsigned flags = 0;
400         
401         UFSD(("ENTER\n"))
402         
403         uspi = sbi->s_uspi;
404
405         usb  = (struct ufs_super_block *)
406                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
407
408         flags = UFS_SB(sb)->s_flags;
409         
410         /*
411          * Read cs structures from (usually) first data block
412          * on the device. 
413          */
414         size = uspi->s_cssize;
415         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
416         base = space = kmalloc(size, GFP_KERNEL);
417         if (!base)
418                 goto failed; 
419         sbi->s_csp = (struct ufs_csum *)space;
420         for (i = 0; i < blks; i += uspi->s_fpb) {
421                 size = uspi->s_bsize;
422                 if (i + uspi->s_fpb > blks)
423                         size = (blks - i) * uspi->s_fsize;
424
425                 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 
426                         ubh = ubh_bread(sb,
427                                 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
428                 else 
429                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
430                 
431                 if (!ubh)
432                         goto failed;
433
434                 ubh_ubhcpymem (space, ubh, size);
435
436                 space += size;
437                 ubh_brelse (ubh);
438                 ubh = NULL;
439         }
440
441         /*
442          * Read cylinder group (we read only first fragment from block
443          * at this time) and prepare internal data structures for cg caching.
444          */
445         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
446                 goto failed;
447         for (i = 0; i < uspi->s_ncg; i++) 
448                 sbi->s_ucg[i] = NULL;
449         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
450                 sbi->s_ucpi[i] = NULL;
451                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
452         }
453         for (i = 0; i < uspi->s_ncg; i++) {
454                 UFSD(("read cg %u\n", i))
455                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
456                         goto failed;
457                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
458                         goto failed;
459 #ifdef UFS_SUPER_DEBUG_MORE
460                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
461 #endif
462         }
463         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
464                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
465                         goto failed;
466                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
467         }
468         sbi->s_cg_loaded = 0;
469         UFSD(("EXIT\n"))
470         return 1;
471
472 failed:
473         kfree (base);
474         if (sbi->s_ucg) {
475                 for (i = 0; i < uspi->s_ncg; i++)
476                         if (sbi->s_ucg[i])
477                                 brelse (sbi->s_ucg[i]);
478                 kfree (sbi->s_ucg);
479                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
480                         kfree (sbi->s_ucpi[i]);
481         }
482         UFSD(("EXIT (FAILED)\n"))
483         return 0;
484 }
485
486 /*
487  * Put on-disk structures associated with cylinder groups and 
488  * write them back to disk
489  */
490 static void ufs_put_cylinder_structures (struct super_block *sb)
491 {
492         struct ufs_sb_info * sbi = UFS_SB(sb);
493         struct ufs_sb_private_info * uspi;
494         struct ufs_buffer_head * ubh;
495         unsigned char * base, * space;
496         unsigned blks, size, i;
497         
498         UFSD(("ENTER\n"))
499         
500         uspi = sbi->s_uspi;
501
502         size = uspi->s_cssize;
503         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
504         base = space = (char*) sbi->s_csp;
505         for (i = 0; i < blks; i += uspi->s_fpb) {
506                 size = uspi->s_bsize;
507                 if (i + uspi->s_fpb > blks)
508                         size = (blks - i) * uspi->s_fsize;
509                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
510                 ubh_memcpyubh (ubh, space, size);
511                 space += size;
512                 ubh_mark_buffer_uptodate (ubh, 1);
513                 ubh_mark_buffer_dirty (ubh);
514                 ubh_brelse (ubh);
515         }
516         for (i = 0; i < sbi->s_cg_loaded; i++) {
517                 ufs_put_cylinder (sb, i);
518                 kfree (sbi->s_ucpi[i]);
519         }
520         for (; i < UFS_MAX_GROUP_LOADED; i++) 
521                 kfree (sbi->s_ucpi[i]);
522         for (i = 0; i < uspi->s_ncg; i++) 
523                 brelse (sbi->s_ucg[i]);
524         kfree (sbi->s_ucg);
525         kfree (base);
526         UFSD(("EXIT\n"))
527 }
528
529 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
530 {
531         struct ufs_sb_info * sbi;
532         struct ufs_sb_private_info * uspi;
533         struct ufs_super_block_first * usb1;
534         struct ufs_super_block_second * usb2;
535         struct ufs_super_block_third * usb3;
536         struct ufs_super_block *usb;
537         struct ufs_buffer_head * ubh;   
538         struct inode *inode;
539         unsigned block_size, super_block_size;
540         unsigned flags;
541         unsigned super_block_offset;
542
543         uspi = NULL;
544         ubh = NULL;
545         flags = 0;
546         
547         UFSD(("ENTER\n"))
548                 
549         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
550         if (!sbi)
551                 goto failed_nomem;
552         sb->s_fs_info = sbi;
553         memset(sbi, 0, sizeof(struct ufs_sb_info));
554
555         UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
556         
557 #ifndef CONFIG_UFS_FS_WRITE
558         if (!(sb->s_flags & MS_RDONLY)) {
559                 printk("ufs was compiled with read-only support, "
560                 "can't be mounted as read-write\n");
561                 goto failed;
562         }
563 #endif
564         /*
565          * Set default mount options
566          * Parse mount options
567          */
568         sbi->s_mount_opt = 0;
569         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
570         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
571                 printk("wrong mount options\n");
572                 goto failed;
573         }
574         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
575                 if (!silent)
576                         printk("You didn't specify the type of your ufs filesystem\n\n"
577                         "mount -t ufs -o ufstype="
578                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
579                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
580                         "default is ufstype=old\n");
581                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
582         }
583
584         sbi->s_uspi = uspi =
585                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
586         if (!uspi)
587                 goto failed;
588
589         super_block_offset=UFS_SBLOCK;
590
591         /* Keep 2Gig file limit. Some UFS variants need to override 
592            this but as I don't know which I'll let those in the know loosen
593            the rules */
594         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
595         case UFS_MOUNT_UFSTYPE_44BSD:
596                 UFSD(("ufstype=44bsd\n"))
597                 uspi->s_fsize = block_size = 512;
598                 uspi->s_fmask = ~(512 - 1);
599                 uspi->s_fshift = 9;
600                 uspi->s_sbsize = super_block_size = 1536;
601                 uspi->s_sbbase = 0;
602                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
603                 break;
604         case UFS_MOUNT_UFSTYPE_UFS2:
605                 UFSD(("ufstype=ufs2\n"));
606                 super_block_offset=SBLOCK_UFS2;
607                 uspi->s_fsize = block_size = 512;
608                 uspi->s_fmask = ~(512 - 1);
609                 uspi->s_fshift = 9;
610                 uspi->s_sbsize = super_block_size = 1536;
611                 uspi->s_sbbase =  0;
612                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
613                 if (!(sb->s_flags & MS_RDONLY)) {
614                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
615                         sb->s_flags |= MS_RDONLY;
616                 }
617                 break;
618                 
619         case UFS_MOUNT_UFSTYPE_SUN:
620                 UFSD(("ufstype=sun\n"))
621                 uspi->s_fsize = block_size = 1024;
622                 uspi->s_fmask = ~(1024 - 1);
623                 uspi->s_fshift = 10;
624                 uspi->s_sbsize = super_block_size = 2048;
625                 uspi->s_sbbase = 0;
626                 uspi->s_maxsymlinklen = 56;
627                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
628                 break;
629
630         case UFS_MOUNT_UFSTYPE_SUNx86:
631                 UFSD(("ufstype=sunx86\n"))
632                 uspi->s_fsize = block_size = 1024;
633                 uspi->s_fmask = ~(1024 - 1);
634                 uspi->s_fshift = 10;
635                 uspi->s_sbsize = super_block_size = 2048;
636                 uspi->s_sbbase = 0;
637                 uspi->s_maxsymlinklen = 56;
638                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
639                 break;
640
641         case UFS_MOUNT_UFSTYPE_OLD:
642                 UFSD(("ufstype=old\n"))
643                 uspi->s_fsize = block_size = 1024;
644                 uspi->s_fmask = ~(1024 - 1);
645                 uspi->s_fshift = 10;
646                 uspi->s_sbsize = super_block_size = 2048;
647                 uspi->s_sbbase = 0;
648                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
649                 if (!(sb->s_flags & MS_RDONLY)) {
650                         if (!silent)
651                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
652                         sb->s_flags |= MS_RDONLY;
653                 }
654                 break;
655         
656         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
657                 UFSD(("ufstype=nextstep\n"))
658                 uspi->s_fsize = block_size = 1024;
659                 uspi->s_fmask = ~(1024 - 1);
660                 uspi->s_fshift = 10;
661                 uspi->s_sbsize = super_block_size = 2048;
662                 uspi->s_sbbase = 0;
663                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
664                 if (!(sb->s_flags & MS_RDONLY)) {
665                         if (!silent)
666                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
667                         sb->s_flags |= MS_RDONLY;
668                 }
669                 break;
670         
671         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
672                 UFSD(("ufstype=nextstep-cd\n"))
673                 uspi->s_fsize = block_size = 2048;
674                 uspi->s_fmask = ~(2048 - 1);
675                 uspi->s_fshift = 11;
676                 uspi->s_sbsize = super_block_size = 2048;
677                 uspi->s_sbbase = 0;
678                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
679                 if (!(sb->s_flags & MS_RDONLY)) {
680                         if (!silent)
681                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
682                         sb->s_flags |= MS_RDONLY;
683                 }
684                 break;
685         
686         case UFS_MOUNT_UFSTYPE_OPENSTEP:
687                 UFSD(("ufstype=openstep\n"))
688                 uspi->s_fsize = block_size = 1024;
689                 uspi->s_fmask = ~(1024 - 1);
690                 uspi->s_fshift = 10;
691                 uspi->s_sbsize = super_block_size = 2048;
692                 uspi->s_sbbase = 0;
693                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
694                 if (!(sb->s_flags & MS_RDONLY)) {
695                         if (!silent)
696                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
697                         sb->s_flags |= MS_RDONLY;
698                 }
699                 break;
700         
701         case UFS_MOUNT_UFSTYPE_HP:
702                 UFSD(("ufstype=hp\n"))
703                 uspi->s_fsize = block_size = 1024;
704                 uspi->s_fmask = ~(1024 - 1);
705                 uspi->s_fshift = 10;
706                 uspi->s_sbsize = super_block_size = 2048;
707                 uspi->s_sbbase = 0;
708                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
709                 if (!(sb->s_flags & MS_RDONLY)) {
710                         if (!silent)
711                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
712                         sb->s_flags |= MS_RDONLY;
713                 }
714                 break;
715         default:
716                 if (!silent)
717                         printk("unknown ufstype\n");
718                 goto failed;
719         }
720         
721 again:  
722         if (!sb_set_blocksize(sb, block_size)) {
723                 printk(KERN_ERR "UFS: failed to set blocksize\n");
724                 goto failed;
725         }
726
727         /*
728          * read ufs super block from device
729          */
730
731         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
732         
733         if (!ubh) 
734             goto failed;
735
736         
737         usb1 = ubh_get_usb_first(uspi);
738         usb2 = ubh_get_usb_second(uspi);
739         usb3 = ubh_get_usb_third(uspi);
740         usb  = (struct ufs_super_block *)
741                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
742
743         /*
744          * Check ufs magic number
745          */
746         sbi->s_bytesex = BYTESEX_LE;
747         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
748                 case UFS_MAGIC:
749                 case UFS2_MAGIC:
750                 case UFS_MAGIC_LFN:
751                 case UFS_MAGIC_FEA:
752                 case UFS_MAGIC_4GB:
753                         goto magic_found;
754         }
755         sbi->s_bytesex = BYTESEX_BE;
756         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
757                 case UFS_MAGIC:
758                 case UFS2_MAGIC:
759                 case UFS_MAGIC_LFN:
760                 case UFS_MAGIC_FEA:
761                 case UFS_MAGIC_4GB:
762                         goto magic_found;
763         }
764
765         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
766           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
767           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
768           && uspi->s_sbbase < 256) {
769                 ubh_brelse_uspi(uspi);
770                 ubh = NULL;
771                 uspi->s_sbbase += 8;
772                 goto again;
773         }
774         if (!silent)
775                 printk("ufs_read_super: bad magic number\n");
776         goto failed;
777
778 magic_found:
779         /*
780          * Check block and fragment sizes
781          */
782         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
783         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
784         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
785         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
786         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
787
788         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
789                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
790                         uspi->s_fsize);
791                         goto failed;
792         }
793         if (uspi->s_fsize < 512) {
794                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
795                         uspi->s_fsize);
796                 goto failed;
797         }
798         if (uspi->s_fsize > 4096) {
799                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
800                         uspi->s_fsize);
801                 goto failed;
802         }
803         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
804                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
805                         uspi->s_bsize);
806                 goto failed;
807         }
808         if (uspi->s_bsize < 4096) {
809                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
810                         uspi->s_bsize);
811                 goto failed;
812         }
813         if (uspi->s_bsize / uspi->s_fsize > 8) {
814                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
815                         uspi->s_bsize / uspi->s_fsize);
816                 goto failed;
817         }
818         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
819                 ubh_brelse_uspi(uspi);
820                 ubh = NULL;
821                 block_size = uspi->s_fsize;
822                 super_block_size = uspi->s_sbsize;
823                 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
824                 goto again;
825         }
826
827 #ifdef UFS_SUPER_DEBUG_MORE
828         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
829                 ufs2_print_super_stuff(sb,usb);
830         else
831                 ufs_print_super_stuff(sb, usb1, usb2, usb3);
832 #endif
833
834         /*
835          * Check, if file system was correctly unmounted.
836          * If not, make it read only.
837          */
838         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
839           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
840           (((flags & UFS_ST_MASK) == UFS_ST_SUN || 
841           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 
842           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
843                 switch(usb1->fs_clean) {
844                 case UFS_FSCLEAN:
845                         UFSD(("fs is clean\n"))
846                         break;
847                 case UFS_FSSTABLE:
848                         UFSD(("fs is stable\n"))
849                         break;
850                 case UFS_FSOSF1:
851                         UFSD(("fs is DEC OSF/1\n"))
852                         break;
853                 case UFS_FSACTIVE:
854                         printk("ufs_read_super: fs is active\n");
855                         sb->s_flags |= MS_RDONLY;
856                         break;
857                 case UFS_FSBAD:
858                         printk("ufs_read_super: fs is bad\n");
859                         sb->s_flags |= MS_RDONLY;
860                         break;
861                 default:
862                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
863                         sb->s_flags |= MS_RDONLY;
864                         break;
865                 }
866         }
867         else {
868                 printk("ufs_read_super: fs needs fsck\n");
869                 sb->s_flags |= MS_RDONLY;
870         }
871
872         /*
873          * Read ufs_super_block into internal data structures
874          */
875         sb->s_op = &ufs_super_ops;
876         sb->dq_op = NULL; /***/
877         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
878
879         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
880         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
881         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
882         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
883         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
884         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
885
886         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
887                 uspi->s_u2_size  = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
888                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
889         }
890         else {
891                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
892                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
893         }
894
895         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
896         /* s_bsize already set */
897         /* s_fsize already set */
898         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
899         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
900         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
901         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
902         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
903         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
904         UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
905                 uspi->s_fshift));
906         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
907         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
908         /* s_sbsize already set */
909         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
910         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
911         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
912         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
913         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
914         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
915         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
916         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
917         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
918         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
919         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
920         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
921         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
922         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
923         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
924         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
925         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
926         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
927         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
928         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
929         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
930         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
931         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
932         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
933
934         /*
935          * Compute another frequently used values
936          */
937         uspi->s_fpbmask = uspi->s_fpb - 1;
938         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
939                 uspi->s_apbshift = uspi->s_bshift - 3;
940         }
941         else {
942                 uspi->s_apbshift = uspi->s_bshift - 2;
943         }
944         uspi->s_2apbshift = uspi->s_apbshift * 2;
945         uspi->s_3apbshift = uspi->s_apbshift * 3;
946         uspi->s_apb = 1 << uspi->s_apbshift;
947         uspi->s_2apb = 1 << uspi->s_2apbshift;
948         uspi->s_3apb = 1 << uspi->s_3apbshift;
949         uspi->s_apbmask = uspi->s_apb - 1;
950         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
951         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
952         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
953         uspi->s_bpf = uspi->s_fsize << 3;
954         uspi->s_bpfshift = uspi->s_fshift + 3;
955         uspi->s_bpfmask = uspi->s_bpf - 1;
956         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
957             UFS_MOUNT_UFSTYPE_44BSD)
958                 uspi->s_maxsymlinklen =
959                     fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
960         
961         sbi->s_flags = flags;
962
963         inode = iget(sb, UFS_ROOTINO);
964         if (!inode || is_bad_inode(inode))
965                 goto failed;
966         sb->s_root = d_alloc_root(inode);
967         if (!sb->s_root)
968                 goto dalloc_failed;
969
970
971         /*
972          * Read cylinder group structures
973          */
974         if (!(sb->s_flags & MS_RDONLY))
975                 if (!ufs_read_cylinder_structures(sb))
976                         goto failed;
977
978         UFSD(("EXIT\n"))
979         return 0;
980
981 dalloc_failed:
982         iput(inode);
983 failed:
984         if (ubh)
985                 ubh_brelse_uspi (uspi);
986         kfree (uspi);
987         kfree(sbi);
988         sb->s_fs_info = NULL;
989         UFSD(("EXIT (FAILED)\n"))
990         return -EINVAL;
991
992 failed_nomem:
993         UFSD(("EXIT (NOMEM)\n"))
994         return -ENOMEM;
995 }
996
997 static void ufs_write_super (struct super_block *sb) {
998         struct ufs_sb_private_info * uspi;
999         struct ufs_super_block_first * usb1;
1000         struct ufs_super_block_third * usb3;
1001         unsigned flags;
1002
1003         lock_kernel();
1004
1005         UFSD(("ENTER\n"))
1006         flags = UFS_SB(sb)->s_flags;
1007         uspi = UFS_SB(sb)->s_uspi;
1008         usb1 = ubh_get_usb_first(uspi);
1009         usb3 = ubh_get_usb_third(uspi);
1010
1011         if (!(sb->s_flags & MS_RDONLY)) {
1012                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1013                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
1014                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1015                         ufs_set_fs_state(sb, usb1, usb3,
1016                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1017                 ubh_mark_buffer_dirty (USPI_UBH);
1018         }
1019         sb->s_dirt = 0;
1020         UFSD(("EXIT\n"))
1021         unlock_kernel();
1022 }
1023
1024 static void ufs_put_super (struct super_block *sb)
1025 {
1026         struct ufs_sb_info * sbi = UFS_SB(sb);
1027                 
1028         UFSD(("ENTER\n"))
1029
1030         if (!(sb->s_flags & MS_RDONLY))
1031                 ufs_put_cylinder_structures (sb);
1032         
1033         ubh_brelse_uspi (sbi->s_uspi);
1034         kfree (sbi->s_uspi);
1035         kfree (sbi);
1036         sb->s_fs_info = NULL;
1037         return;
1038 }
1039
1040
1041 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1042 {
1043         struct ufs_sb_private_info * uspi;
1044         struct ufs_super_block_first * usb1;
1045         struct ufs_super_block_third * usb3;
1046         unsigned new_mount_opt, ufstype;
1047         unsigned flags;
1048         
1049         uspi = UFS_SB(sb)->s_uspi;
1050         flags = UFS_SB(sb)->s_flags;
1051         usb1 = ubh_get_usb_first(uspi);
1052         usb3 = ubh_get_usb_third(uspi);
1053         
1054         /*
1055          * Allow the "check" option to be passed as a remount option.
1056          * It is not possible to change ufstype option during remount
1057          */
1058         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1059         new_mount_opt = 0;
1060         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1061         if (!ufs_parse_options (data, &new_mount_opt))
1062                 return -EINVAL;
1063         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1064                 new_mount_opt |= ufstype;
1065         }
1066         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1067                 printk("ufstype can't be changed during remount\n");
1068                 return -EINVAL;
1069         }
1070
1071         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1072                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1073                 return 0;
1074         }
1075         
1076         /*
1077          * fs was mouted as rw, remounting ro
1078          */
1079         if (*mount_flags & MS_RDONLY) {
1080                 ufs_put_cylinder_structures(sb);
1081                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1082                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1083                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1084                         ufs_set_fs_state(sb, usb1, usb3,
1085                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1086                 ubh_mark_buffer_dirty (USPI_UBH);
1087                 sb->s_dirt = 0;
1088                 sb->s_flags |= MS_RDONLY;
1089         }
1090         /*
1091          * fs was mounted as ro, remounting rw
1092          */
1093         else {
1094 #ifndef CONFIG_UFS_FS_WRITE
1095                 printk("ufs was compiled with read-only support, "
1096                 "can't be mounted as read-write\n");
1097                 return -EINVAL;
1098 #else
1099                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1100                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1101                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1102                         printk("this ufstype is read-only supported\n");
1103                         return -EINVAL;
1104                 }
1105                 if (!ufs_read_cylinder_structures (sb)) {
1106                         printk("failed during remounting\n");
1107                         return -EPERM;
1108                 }
1109                 sb->s_flags &= ~MS_RDONLY;
1110 #endif
1111         }
1112         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1113         return 0;
1114 }
1115
1116 static int ufs_statfs (struct dentry *dentry, struct kstatfs *buf)
1117 {
1118         struct super_block *sb = dentry->d_sb;
1119         struct ufs_sb_private_info * uspi;
1120         struct ufs_super_block_first * usb1;
1121         struct ufs_super_block * usb;
1122         unsigned  flags = 0;
1123
1124         lock_kernel();
1125
1126         uspi = UFS_SB(sb)->s_uspi;
1127         usb1 = ubh_get_usb_first (uspi);
1128         usb  = (struct ufs_super_block *)
1129                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1130         
1131         flags = UFS_SB(sb)->s_flags;
1132         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1133                 buf->f_type = UFS2_MAGIC;
1134                 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1135                 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1136                         fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1137                 buf->f_ffree = fs64_to_cpu(sb,
1138                         usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1139         }
1140         else {
1141                 buf->f_type = UFS_MAGIC;
1142                 buf->f_blocks = uspi->s_dsize;
1143                 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1144                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1145                 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1146         }
1147         buf->f_bsize = sb->s_blocksize;
1148         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1149                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1150         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1151         buf->f_namelen = UFS_MAXNAMLEN;
1152
1153         unlock_kernel();
1154
1155         return 0;
1156 }
1157
1158 static kmem_cache_t * ufs_inode_cachep;
1159
1160 static struct inode *ufs_alloc_inode(struct super_block *sb)
1161 {
1162         struct ufs_inode_info *ei;
1163         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1164         if (!ei)
1165                 return NULL;
1166         ei->vfs_inode.i_version = 1;
1167         return &ei->vfs_inode;
1168 }
1169
1170 static void ufs_destroy_inode(struct inode *inode)
1171 {
1172         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1173 }
1174
1175 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1176 {
1177         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1178
1179         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1180             SLAB_CTOR_CONSTRUCTOR)
1181                 inode_init_once(&ei->vfs_inode);
1182 }
1183  
1184 static int init_inodecache(void)
1185 {
1186         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1187                                              sizeof(struct ufs_inode_info),
1188                                              0, (SLAB_RECLAIM_ACCOUNT|
1189                                                 SLAB_MEM_SPREAD),
1190                                              init_once, NULL);
1191         if (ufs_inode_cachep == NULL)
1192                 return -ENOMEM;
1193         return 0;
1194 }
1195
1196 static void destroy_inodecache(void)
1197 {
1198         if (kmem_cache_destroy(ufs_inode_cachep))
1199                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1200 }
1201
1202 #ifdef CONFIG_QUOTA
1203 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1204 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1205 #endif
1206
1207 static struct super_operations ufs_super_ops = {
1208         .alloc_inode    = ufs_alloc_inode,
1209         .destroy_inode  = ufs_destroy_inode,
1210         .read_inode     = ufs_read_inode,
1211         .write_inode    = ufs_write_inode,
1212         .delete_inode   = ufs_delete_inode,
1213         .put_super      = ufs_put_super,
1214         .write_super    = ufs_write_super,
1215         .statfs         = ufs_statfs,
1216         .remount_fs     = ufs_remount,
1217 #ifdef CONFIG_QUOTA
1218         .quota_read     = ufs_quota_read,
1219         .quota_write    = ufs_quota_write,
1220 #endif
1221 };
1222
1223 #ifdef CONFIG_QUOTA
1224
1225 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1226  * acquiring the locks... As quota files are never truncated and quota code
1227  * itself serializes the operations (and noone else should touch the files)
1228  * we don't have to be afraid of races */
1229 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1230                                size_t len, loff_t off)
1231 {
1232         struct inode *inode = sb_dqopt(sb)->files[type];
1233         sector_t blk = off >> sb->s_blocksize_bits;
1234         int err = 0;
1235         int offset = off & (sb->s_blocksize - 1);
1236         int tocopy;
1237         size_t toread;
1238         struct buffer_head *bh;
1239         loff_t i_size = i_size_read(inode);
1240
1241         if (off > i_size)
1242                 return 0;
1243         if (off+len > i_size)
1244                 len = i_size-off;
1245         toread = len;
1246         while (toread > 0) {
1247                 tocopy = sb->s_blocksize - offset < toread ?
1248                                 sb->s_blocksize - offset : toread;
1249
1250                 bh = ufs_bread(inode, blk, 0, &err);
1251                 if (err)
1252                         return err;
1253                 if (!bh)        /* A hole? */
1254                         memset(data, 0, tocopy);
1255                 else {
1256                         memcpy(data, bh->b_data+offset, tocopy);
1257                         brelse(bh);
1258                 }
1259                 offset = 0;
1260                 toread -= tocopy;
1261                 data += tocopy;
1262                 blk++;
1263         }
1264         return len;
1265 }
1266
1267 /* Write to quotafile */
1268 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1269                                 const char *data, size_t len, loff_t off)
1270 {
1271         struct inode *inode = sb_dqopt(sb)->files[type];
1272         sector_t blk = off >> sb->s_blocksize_bits;
1273         int err = 0;
1274         int offset = off & (sb->s_blocksize - 1);
1275         int tocopy;
1276         size_t towrite = len;
1277         struct buffer_head *bh;
1278
1279         mutex_lock(&inode->i_mutex);
1280         while (towrite > 0) {
1281                 tocopy = sb->s_blocksize - offset < towrite ?
1282                                 sb->s_blocksize - offset : towrite;
1283
1284                 bh = ufs_bread(inode, blk, 1, &err);
1285                 if (!bh)
1286                         goto out;
1287                 lock_buffer(bh);
1288                 memcpy(bh->b_data+offset, data, tocopy);
1289                 flush_dcache_page(bh->b_page);
1290                 set_buffer_uptodate(bh);
1291                 mark_buffer_dirty(bh);
1292                 unlock_buffer(bh);
1293                 brelse(bh);
1294                 offset = 0;
1295                 towrite -= tocopy;
1296                 data += tocopy;
1297                 blk++;
1298         }
1299 out:
1300         if (len == towrite) {
1301                 mutex_unlock(&inode->i_mutex);
1302                 return err;
1303         }
1304         if (inode->i_size < off+len-towrite)
1305                 i_size_write(inode, off+len-towrite);
1306         inode->i_version++;
1307         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1308         mark_inode_dirty(inode);
1309         mutex_unlock(&inode->i_mutex);
1310         return len - towrite;
1311 }
1312
1313 #endif
1314
1315 static int ufs_get_sb(struct file_system_type *fs_type,
1316         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1317 {
1318         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1319 }
1320
1321 static struct file_system_type ufs_fs_type = {
1322         .owner          = THIS_MODULE,
1323         .name           = "ufs",
1324         .get_sb         = ufs_get_sb,
1325         .kill_sb        = kill_block_super,
1326         .fs_flags       = FS_REQUIRES_DEV,
1327 };
1328
1329 static int __init init_ufs_fs(void)
1330 {
1331         int err = init_inodecache();
1332         if (err)
1333                 goto out1;
1334         err = register_filesystem(&ufs_fs_type);
1335         if (err)
1336                 goto out;
1337         return 0;
1338 out:
1339         destroy_inodecache();
1340 out1:
1341         return err;
1342 }
1343
1344 static void __exit exit_ufs_fs(void)
1345 {
1346         unregister_filesystem(&ufs_fs_type);
1347         destroy_inodecache();
1348 }
1349
1350 module_init(init_ufs_fs)
1351 module_exit(exit_ufs_fs)
1352 MODULE_LICENSE("GPL");