[PATCH] nfsd4: check lock type against openmode.
[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_UBH);
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_UBH);
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                         if (!ubh)
427                                 goto failed;
428                         ubh_ubhcpymem (space, ubh, size);
429                         sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
430                 }
431                 else {
432                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
433                         if (!ubh)
434                                 goto failed;
435                         ubh_ubhcpymem(space, ubh, size);
436                         sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
437                 }
438                 space += size;
439                 ubh_brelse (ubh);
440                 ubh = NULL;
441         }
442
443         /*
444          * Read cylinder group (we read only first fragment from block
445          * at this time) and prepare internal data structures for cg caching.
446          */
447         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
448                 goto failed;
449         for (i = 0; i < uspi->s_ncg; i++) 
450                 sbi->s_ucg[i] = NULL;
451         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
452                 sbi->s_ucpi[i] = NULL;
453                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
454         }
455         for (i = 0; i < uspi->s_ncg; i++) {
456                 UFSD(("read cg %u\n", i))
457                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
458                         goto failed;
459                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
460                         goto failed;
461 #ifdef UFS_SUPER_DEBUG_MORE
462                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
463 #endif
464         }
465         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
466                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
467                         goto failed;
468                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
469         }
470         sbi->s_cg_loaded = 0;
471         UFSD(("EXIT\n"))
472         return 1;
473
474 failed:
475         if (base) kfree (base);
476         if (sbi->s_ucg) {
477                 for (i = 0; i < uspi->s_ncg; i++)
478                         if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]);
479                 kfree (sbi->s_ucg);
480                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
481                         if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]);
482         }
483         UFSD(("EXIT (FAILED)\n"))
484         return 0;
485 }
486
487 /*
488  * Put on-disk structures associated with cylinder groups and 
489  * write them back to disk
490  */
491 static void ufs_put_cylinder_structures (struct super_block *sb) {
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[0];
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
542         uspi = NULL;
543         ubh = NULL;
544         flags = 0;
545         
546         UFSD(("ENTER\n"))
547                 
548         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
549         if (!sbi)
550                 goto failed_nomem;
551         sb->s_fs_info = sbi;
552         memset(sbi, 0, sizeof(struct ufs_sb_info));
553
554         UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
555         
556 #ifndef CONFIG_UFS_FS_WRITE
557         if (!(sb->s_flags & MS_RDONLY)) {
558                 printk("ufs was compiled with read-only support, "
559                 "can't be mounted as read-write\n");
560                 goto failed;
561         }
562 #endif
563         /*
564          * Set default mount options
565          * Parse mount options
566          */
567         sbi->s_mount_opt = 0;
568         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
569         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
570                 printk("wrong mount options\n");
571                 goto failed;
572         }
573         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
574                 if (!silent)
575                         printk("You didn't specify the type of your ufs filesystem\n\n"
576                         "mount -t ufs -o ufstype="
577                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
578                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
579                         "default is ufstype=old\n");
580                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
581         }
582
583         sbi->s_uspi = uspi =
584                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
585         if (!uspi)
586                 goto failed;
587
588         /* Keep 2Gig file limit. Some UFS variants need to override 
589            this but as I don't know which I'll let those in the know loosen
590            the rules */
591            
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                 uspi->s_fsize = block_size = 512;
605                 uspi->s_fmask = ~(512 - 1);
606                 uspi->s_fshift = 9;
607                 uspi->s_sbsize = super_block_size = 1536;
608                 uspi->s_sbbase =  0;
609                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
610                 if (!(sb->s_flags & MS_RDONLY)) {
611                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
612                         sb->s_flags |= MS_RDONLY;
613                 }
614                 break;
615                 
616         case UFS_MOUNT_UFSTYPE_SUN:
617                 UFSD(("ufstype=sun\n"))
618                 uspi->s_fsize = block_size = 1024;
619                 uspi->s_fmask = ~(1024 - 1);
620                 uspi->s_fshift = 10;
621                 uspi->s_sbsize = super_block_size = 2048;
622                 uspi->s_sbbase = 0;
623                 uspi->s_maxsymlinklen = 56;
624                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
625                 break;
626
627         case UFS_MOUNT_UFSTYPE_SUNx86:
628                 UFSD(("ufstype=sunx86\n"))
629                 uspi->s_fsize = block_size = 1024;
630                 uspi->s_fmask = ~(1024 - 1);
631                 uspi->s_fshift = 10;
632                 uspi->s_sbsize = super_block_size = 2048;
633                 uspi->s_sbbase = 0;
634                 uspi->s_maxsymlinklen = 56;
635                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
636                 break;
637
638         case UFS_MOUNT_UFSTYPE_OLD:
639                 UFSD(("ufstype=old\n"))
640                 uspi->s_fsize = block_size = 1024;
641                 uspi->s_fmask = ~(1024 - 1);
642                 uspi->s_fshift = 10;
643                 uspi->s_sbsize = super_block_size = 2048;
644                 uspi->s_sbbase = 0;
645                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
646                 if (!(sb->s_flags & MS_RDONLY)) {
647                         if (!silent)
648                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
649                         sb->s_flags |= MS_RDONLY;
650                 }
651                 break;
652         
653         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
654                 UFSD(("ufstype=nextstep\n"))
655                 uspi->s_fsize = block_size = 1024;
656                 uspi->s_fmask = ~(1024 - 1);
657                 uspi->s_fshift = 10;
658                 uspi->s_sbsize = super_block_size = 2048;
659                 uspi->s_sbbase = 0;
660                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
661                 if (!(sb->s_flags & MS_RDONLY)) {
662                         if (!silent)
663                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
664                         sb->s_flags |= MS_RDONLY;
665                 }
666                 break;
667         
668         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
669                 UFSD(("ufstype=nextstep-cd\n"))
670                 uspi->s_fsize = block_size = 2048;
671                 uspi->s_fmask = ~(2048 - 1);
672                 uspi->s_fshift = 11;
673                 uspi->s_sbsize = super_block_size = 2048;
674                 uspi->s_sbbase = 0;
675                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
676                 if (!(sb->s_flags & MS_RDONLY)) {
677                         if (!silent)
678                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
679                         sb->s_flags |= MS_RDONLY;
680                 }
681                 break;
682         
683         case UFS_MOUNT_UFSTYPE_OPENSTEP:
684                 UFSD(("ufstype=openstep\n"))
685                 uspi->s_fsize = block_size = 1024;
686                 uspi->s_fmask = ~(1024 - 1);
687                 uspi->s_fshift = 10;
688                 uspi->s_sbsize = super_block_size = 2048;
689                 uspi->s_sbbase = 0;
690                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
691                 if (!(sb->s_flags & MS_RDONLY)) {
692                         if (!silent)
693                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
694                         sb->s_flags |= MS_RDONLY;
695                 }
696                 break;
697         
698         case UFS_MOUNT_UFSTYPE_HP:
699                 UFSD(("ufstype=hp\n"))
700                 uspi->s_fsize = block_size = 1024;
701                 uspi->s_fmask = ~(1024 - 1);
702                 uspi->s_fshift = 10;
703                 uspi->s_sbsize = super_block_size = 2048;
704                 uspi->s_sbbase = 0;
705                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
706                 if (!(sb->s_flags & MS_RDONLY)) {
707                         if (!silent)
708                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
709                         sb->s_flags |= MS_RDONLY;
710                 }
711                 break;
712         default:
713                 if (!silent)
714                         printk("unknown ufstype\n");
715                 goto failed;
716         }
717         
718 again:  
719         if (!sb_set_blocksize(sb, block_size)) {
720                 printk(KERN_ERR "UFS: failed to set blocksize\n");
721                 goto failed;
722         }
723
724         /*
725          * read ufs super block from device
726          */
727         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
728                 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + SBLOCK_UFS2/block_size, super_block_size);
729         }
730         else {
731                 ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
732         }
733         if (!ubh) 
734             goto failed;
735
736         
737         usb1 = ubh_get_usb_first(USPI_UBH);
738         usb2 = ubh_get_usb_second(USPI_UBH);
739         usb3 = ubh_get_usb_third(USPI_UBH);
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) ubh_brelse_uspi (uspi);
985         if (uspi) kfree (uspi);
986         if (sbi) kfree(sbi);
987         sb->s_fs_info = NULL;
988         UFSD(("EXIT (FAILED)\n"))
989         return -EINVAL;
990
991 failed_nomem:
992         UFSD(("EXIT (NOMEM)\n"))
993         return -ENOMEM;
994 }
995
996 static void ufs_write_super (struct super_block *sb) {
997         struct ufs_sb_private_info * uspi;
998         struct ufs_super_block_first * usb1;
999         struct ufs_super_block_third * usb3;
1000         unsigned flags;
1001
1002         lock_kernel();
1003
1004         UFSD(("ENTER\n"))
1005         flags = UFS_SB(sb)->s_flags;
1006         uspi = UFS_SB(sb)->s_uspi;
1007         usb1 = ubh_get_usb_first(USPI_UBH);
1008         usb3 = ubh_get_usb_third(USPI_UBH);
1009
1010         if (!(sb->s_flags & MS_RDONLY)) {
1011                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1012                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
1013                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1014                         ufs_set_fs_state(sb, usb1, usb3,
1015                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1016                 ubh_mark_buffer_dirty (USPI_UBH);
1017         }
1018         sb->s_dirt = 0;
1019         UFSD(("EXIT\n"))
1020         unlock_kernel();
1021 }
1022
1023 static void ufs_put_super (struct super_block *sb)
1024 {
1025         struct ufs_sb_info * sbi = UFS_SB(sb);
1026                 
1027         UFSD(("ENTER\n"))
1028
1029         if (!(sb->s_flags & MS_RDONLY))
1030                 ufs_put_cylinder_structures (sb);
1031         
1032         ubh_brelse_uspi (sbi->s_uspi);
1033         kfree (sbi->s_uspi);
1034         kfree (sbi);
1035         sb->s_fs_info = NULL;
1036         return;
1037 }
1038
1039
1040 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1041 {
1042         struct ufs_sb_private_info * uspi;
1043         struct ufs_super_block_first * usb1;
1044         struct ufs_super_block_third * usb3;
1045         unsigned new_mount_opt, ufstype;
1046         unsigned flags;
1047         
1048         uspi = UFS_SB(sb)->s_uspi;
1049         flags = UFS_SB(sb)->s_flags;
1050         usb1 = ubh_get_usb_first(USPI_UBH);
1051         usb3 = ubh_get_usb_third(USPI_UBH);
1052         
1053         /*
1054          * Allow the "check" option to be passed as a remount option.
1055          * It is not possible to change ufstype option during remount
1056          */
1057         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1058         new_mount_opt = 0;
1059         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1060         if (!ufs_parse_options (data, &new_mount_opt))
1061                 return -EINVAL;
1062         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1063                 new_mount_opt |= ufstype;
1064         }
1065         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1066                 printk("ufstype can't be changed during remount\n");
1067                 return -EINVAL;
1068         }
1069
1070         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1071                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1072                 return 0;
1073         }
1074         
1075         /*
1076          * fs was mouted as rw, remounting ro
1077          */
1078         if (*mount_flags & MS_RDONLY) {
1079                 ufs_put_cylinder_structures(sb);
1080                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1081                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1082                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1083                         ufs_set_fs_state(sb, usb1, usb3,
1084                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1085                 ubh_mark_buffer_dirty (USPI_UBH);
1086                 sb->s_dirt = 0;
1087                 sb->s_flags |= MS_RDONLY;
1088         }
1089         /*
1090          * fs was mounted as ro, remounting rw
1091          */
1092         else {
1093 #ifndef CONFIG_UFS_FS_WRITE
1094                 printk("ufs was compiled with read-only support, "
1095                 "can't be mounted as read-write\n");
1096                 return -EINVAL;
1097 #else
1098                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1099                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1100                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1101                         printk("this ufstype is read-only supported\n");
1102                         return -EINVAL;
1103                 }
1104                 if (!ufs_read_cylinder_structures (sb)) {
1105                         printk("failed during remounting\n");
1106                         return -EPERM;
1107                 }
1108                 sb->s_flags &= ~MS_RDONLY;
1109 #endif
1110         }
1111         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1112         return 0;
1113 }
1114
1115 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
1116 {
1117         struct ufs_sb_private_info * uspi;
1118         struct ufs_super_block_first * usb1;
1119         struct ufs_super_block * usb;
1120         unsigned  flags = 0;
1121
1122         lock_kernel();
1123
1124         uspi = UFS_SB(sb)->s_uspi;
1125         usb1 = ubh_get_usb_first (USPI_UBH);
1126         usb  = (struct ufs_super_block *)
1127                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1128         
1129         flags = UFS_SB(sb)->s_flags;
1130         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1131                 buf->f_type = UFS2_MAGIC;
1132                 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1133                 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1134                         fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1135                 buf->f_ffree = fs64_to_cpu(sb,
1136                         usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1137         }
1138         else {
1139                 buf->f_type = UFS_MAGIC;
1140                 buf->f_blocks = uspi->s_dsize;
1141                 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1142                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1143                 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1144         }
1145         buf->f_bsize = sb->s_blocksize;
1146         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1147                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1148         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1149         buf->f_namelen = UFS_MAXNAMLEN;
1150
1151         unlock_kernel();
1152
1153         return 0;
1154 }
1155
1156 static kmem_cache_t * ufs_inode_cachep;
1157
1158 static struct inode *ufs_alloc_inode(struct super_block *sb)
1159 {
1160         struct ufs_inode_info *ei;
1161         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1162         if (!ei)
1163                 return NULL;
1164         ei->vfs_inode.i_version = 1;
1165         return &ei->vfs_inode;
1166 }
1167
1168 static void ufs_destroy_inode(struct inode *inode)
1169 {
1170         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1171 }
1172
1173 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1174 {
1175         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1176
1177         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1178             SLAB_CTOR_CONSTRUCTOR)
1179                 inode_init_once(&ei->vfs_inode);
1180 }
1181  
1182 static int init_inodecache(void)
1183 {
1184         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1185                                              sizeof(struct ufs_inode_info),
1186                                              0, SLAB_RECLAIM_ACCOUNT,
1187                                              init_once, NULL);
1188         if (ufs_inode_cachep == NULL)
1189                 return -ENOMEM;
1190         return 0;
1191 }
1192
1193 static void destroy_inodecache(void)
1194 {
1195         if (kmem_cache_destroy(ufs_inode_cachep))
1196                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1197 }
1198
1199 #ifdef CONFIG_QUOTA
1200 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1201 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1202 #endif
1203
1204 static struct super_operations ufs_super_ops = {
1205         .alloc_inode    = ufs_alloc_inode,
1206         .destroy_inode  = ufs_destroy_inode,
1207         .read_inode     = ufs_read_inode,
1208         .write_inode    = ufs_write_inode,
1209         .delete_inode   = ufs_delete_inode,
1210         .put_super      = ufs_put_super,
1211         .write_super    = ufs_write_super,
1212         .statfs         = ufs_statfs,
1213         .remount_fs     = ufs_remount,
1214 #ifdef CONFIG_QUOTA
1215         .quota_read     = ufs_quota_read,
1216         .quota_write    = ufs_quota_write,
1217 #endif
1218 };
1219
1220 #ifdef CONFIG_QUOTA
1221
1222 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1223  * acquiring the locks... As quota files are never truncated and quota code
1224  * itself serializes the operations (and noone else should touch the files)
1225  * we don't have to be afraid of races */
1226 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1227                                size_t len, loff_t off)
1228 {
1229         struct inode *inode = sb_dqopt(sb)->files[type];
1230         sector_t blk = off >> sb->s_blocksize_bits;
1231         int err = 0;
1232         int offset = off & (sb->s_blocksize - 1);
1233         int tocopy;
1234         size_t toread;
1235         struct buffer_head *bh;
1236         loff_t i_size = i_size_read(inode);
1237
1238         if (off > i_size)
1239                 return 0;
1240         if (off+len > i_size)
1241                 len = i_size-off;
1242         toread = len;
1243         while (toread > 0) {
1244                 tocopy = sb->s_blocksize - offset < toread ?
1245                                 sb->s_blocksize - offset : toread;
1246
1247                 bh = ufs_bread(inode, blk, 0, &err);
1248                 if (err)
1249                         return err;
1250                 if (!bh)        /* A hole? */
1251                         memset(data, 0, tocopy);
1252                 else {
1253                         memcpy(data, bh->b_data+offset, tocopy);
1254                         brelse(bh);
1255                 }
1256                 offset = 0;
1257                 toread -= tocopy;
1258                 data += tocopy;
1259                 blk++;
1260         }
1261         return len;
1262 }
1263
1264 /* Write to quotafile */
1265 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1266                                 const char *data, size_t len, loff_t off)
1267 {
1268         struct inode *inode = sb_dqopt(sb)->files[type];
1269         sector_t blk = off >> sb->s_blocksize_bits;
1270         int err = 0;
1271         int offset = off & (sb->s_blocksize - 1);
1272         int tocopy;
1273         size_t towrite = len;
1274         struct buffer_head *bh;
1275
1276         down(&inode->i_sem);
1277         while (towrite > 0) {
1278                 tocopy = sb->s_blocksize - offset < towrite ?
1279                                 sb->s_blocksize - offset : towrite;
1280
1281                 bh = ufs_bread(inode, blk, 1, &err);
1282                 if (!bh)
1283                         goto out;
1284                 lock_buffer(bh);
1285                 memcpy(bh->b_data+offset, data, tocopy);
1286                 flush_dcache_page(bh->b_page);
1287                 set_buffer_uptodate(bh);
1288                 mark_buffer_dirty(bh);
1289                 unlock_buffer(bh);
1290                 brelse(bh);
1291                 offset = 0;
1292                 towrite -= tocopy;
1293                 data += tocopy;
1294                 blk++;
1295         }
1296 out:
1297         if (len == towrite)
1298                 return err;
1299         if (inode->i_size < off+len-towrite)
1300                 i_size_write(inode, off+len-towrite);
1301         inode->i_version++;
1302         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1303         mark_inode_dirty(inode);
1304         up(&inode->i_sem);
1305         return len - towrite;
1306 }
1307
1308 #endif
1309
1310 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1311         int flags, const char *dev_name, void *data)
1312 {
1313         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1314 }
1315
1316 static struct file_system_type ufs_fs_type = {
1317         .owner          = THIS_MODULE,
1318         .name           = "ufs",
1319         .get_sb         = ufs_get_sb,
1320         .kill_sb        = kill_block_super,
1321         .fs_flags       = FS_REQUIRES_DEV,
1322 };
1323
1324 static int __init init_ufs_fs(void)
1325 {
1326         int err = init_inodecache();
1327         if (err)
1328                 goto out1;
1329         err = register_filesystem(&ufs_fs_type);
1330         if (err)
1331                 goto out;
1332         return 0;
1333 out:
1334         destroy_inodecache();
1335 out1:
1336         return err;
1337 }
1338
1339 static void __exit exit_ufs_fs(void)
1340 {
1341         unregister_filesystem(&ufs_fs_type);
1342         destroy_inodecache();
1343 }
1344
1345 module_init(init_ufs_fs)
1346 module_exit(exit_ufs_fs)
1347 MODULE_LICENSE("GPL");