38eb0b7a1f3d3111c0e4a1b604d7ac40e110cc46
[linux-3.10.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  * UFS2 write support added by
65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
66  */
67
68
69 #include <linux/module.h>
70 #include <linux/bitops.h>
71
72 #include <stdarg.h>
73
74 #include <asm/uaccess.h>
75 #include <asm/system.h>
76
77 #include <linux/errno.h>
78 #include <linux/fs.h>
79 #include <linux/ufs_fs.h>
80 #include <linux/slab.h>
81 #include <linux/time.h>
82 #include <linux/stat.h>
83 #include <linux/string.h>
84 #include <linux/blkdev.h>
85 #include <linux/init.h>
86 #include <linux/parser.h>
87 #include <linux/smp_lock.h>
88 #include <linux/buffer_head.h>
89 #include <linux/vfs.h>
90 #include <linux/log2.h>
91
92 #include "swab.h"
93 #include "util.h"
94
95 #ifdef CONFIG_UFS_DEBUG
96 /*
97  * Print contents of ufs_super_block, useful for debugging
98  */
99 static void ufs_print_super_stuff(struct super_block *sb,
100                                   struct ufs_super_block_first *usb1,
101                                   struct ufs_super_block_second *usb2,
102                                   struct ufs_super_block_third *usb3)
103 {
104         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
105
106         printk("ufs_print_super_stuff\n");
107         printk("  magic:     0x%x\n", magic);
108         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
109                 printk("  fs_size:   %llu\n", (unsigned long long)
110                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
111                 printk("  fs_dsize:  %llu\n", (unsigned long long)
112                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
113                 printk("  bsize:         %u\n",
114                        fs32_to_cpu(sb, usb1->fs_bsize));
115                 printk("  fsize:         %u\n",
116                        fs32_to_cpu(sb, usb1->fs_fsize));
117                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
118                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
119                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
120                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
121                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
122                 printk("  cs_nbfree(No of free blocks):  %llu\n",
123                        (unsigned long long)
124                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
125                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
126                        (unsigned long long)
127                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
128                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
129                        (unsigned long long)
130                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
131         } else {
132                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
133                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
134                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
135                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
136                 printk(" cgoffset:    %u\n",
137                        fs32_to_cpu(sb, usb1->fs_cgoffset));
138                 printk(" ~cgmask:     0x%x\n",
139                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
140                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
141                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
142                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
143                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
144                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
145                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
146                 printk(" fragshift:   %u\n",
147                        fs32_to_cpu(sb, usb1->fs_fragshift));
148                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
149                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
150                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
151                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
152                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
153                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
154                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
155                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
156                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
157                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
158                 printk(" fstodb:      %u\n",
159                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
160                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
161                 printk(" ndir         %u\n",
162                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
163                 printk(" nifree       %u\n",
164                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
165                 printk(" nbfree       %u\n",
166                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
167                 printk(" nffree       %u\n",
168                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
169         }
170         printk("\n");
171 }
172
173 /*
174  * Print contents of ufs_cylinder_group, useful for debugging
175  */
176 static void ufs_print_cylinder_stuff(struct super_block *sb,
177                                      struct ufs_cylinder_group *cg)
178 {
179         printk("\nufs_print_cylinder_stuff\n");
180         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
181         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
182         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
183         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
184         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
185         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
186         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
187         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
188         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
189         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
190         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
191         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
192         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
193         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
194         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
195             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
196             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
197             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
198             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
199         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
200         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
201         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
202         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
203         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
204         printk("  clustersumoff %u\n",
205                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
206         printk("  clusteroff    %u\n",
207                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
208         printk("  nclusterblks  %u\n",
209                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
210         printk("\n");
211 }
212 #else
213 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
214 #  define ufs_print_cylinder_stuff(sb, cg) /**/
215 #endif /* CONFIG_UFS_DEBUG */
216
217 static const struct super_operations ufs_super_ops;
218
219 static char error_buf[1024];
220
221 void ufs_error (struct super_block * sb, const char * function,
222         const char * fmt, ...)
223 {
224         struct ufs_sb_private_info * uspi;
225         struct ufs_super_block_first * usb1;
226         va_list args;
227
228         uspi = UFS_SB(sb)->s_uspi;
229         usb1 = ubh_get_usb_first(uspi);
230         
231         if (!(sb->s_flags & MS_RDONLY)) {
232                 usb1->fs_clean = UFS_FSBAD;
233                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
234                 sb->s_dirt = 1;
235                 sb->s_flags |= MS_RDONLY;
236         }
237         va_start (args, fmt);
238         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
239         va_end (args);
240         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
241         case UFS_MOUNT_ONERROR_PANIC:
242                 panic ("UFS-fs panic (device %s): %s: %s\n", 
243                         sb->s_id, function, error_buf);
244
245         case UFS_MOUNT_ONERROR_LOCK:
246         case UFS_MOUNT_ONERROR_UMOUNT:
247         case UFS_MOUNT_ONERROR_REPAIR:
248                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
249                         sb->s_id, function, error_buf);
250         }               
251 }
252
253 void ufs_panic (struct super_block * sb, const char * function,
254         const char * fmt, ...)
255 {
256         struct ufs_sb_private_info * uspi;
257         struct ufs_super_block_first * usb1;
258         va_list args;
259         
260         uspi = UFS_SB(sb)->s_uspi;
261         usb1 = ubh_get_usb_first(uspi);
262         
263         if (!(sb->s_flags & MS_RDONLY)) {
264                 usb1->fs_clean = UFS_FSBAD;
265                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
266                 sb->s_dirt = 1;
267         }
268         va_start (args, fmt);
269         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
270         va_end (args);
271         sb->s_flags |= MS_RDONLY;
272         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
273                 sb->s_id, function, error_buf);
274 }
275
276 void ufs_warning (struct super_block * sb, const char * function,
277         const char * fmt, ...)
278 {
279         va_list args;
280
281         va_start (args, fmt);
282         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
283         va_end (args);
284         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
285                 sb->s_id, function, error_buf);
286 }
287
288 enum {
289         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
290         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
291         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
292         Opt_onerror_umount, Opt_onerror_repair, Opt_err
293 };
294
295 static match_table_t tokens = {
296         {Opt_type_old, "ufstype=old"},
297         {Opt_type_sunx86, "ufstype=sunx86"},
298         {Opt_type_sun, "ufstype=sun"},
299         {Opt_type_44bsd, "ufstype=44bsd"},
300         {Opt_type_ufs2, "ufstype=ufs2"},
301         {Opt_type_ufs2, "ufstype=5xbsd"},
302         {Opt_type_hp, "ufstype=hp"},
303         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
304         {Opt_type_nextstep, "ufstype=nextstep"},
305         {Opt_type_openstep, "ufstype=openstep"},
306         {Opt_onerror_panic, "onerror=panic"},
307         {Opt_onerror_lock, "onerror=lock"},
308         {Opt_onerror_umount, "onerror=umount"},
309         {Opt_onerror_repair, "onerror=repair"},
310         {Opt_err, NULL}
311 };
312
313 static int ufs_parse_options (char * options, unsigned * mount_options)
314 {
315         char * p;
316         
317         UFSD("ENTER\n");
318         
319         if (!options)
320                 return 1;
321
322         while ((p = strsep(&options, ",")) != NULL) {
323                 substring_t args[MAX_OPT_ARGS];
324                 int token;
325                 if (!*p)
326                         continue;
327
328                 token = match_token(p, tokens, args);
329                 switch (token) {
330                 case Opt_type_old:
331                         ufs_clear_opt (*mount_options, UFSTYPE);
332                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
333                         break;
334                 case Opt_type_sunx86:
335                         ufs_clear_opt (*mount_options, UFSTYPE);
336                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
337                         break;
338                 case Opt_type_sun:
339                         ufs_clear_opt (*mount_options, UFSTYPE);
340                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
341                         break;
342                 case Opt_type_44bsd:
343                         ufs_clear_opt (*mount_options, UFSTYPE);
344                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
345                         break;
346                 case Opt_type_ufs2:
347                         ufs_clear_opt(*mount_options, UFSTYPE);
348                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
349                         break;
350                 case Opt_type_hp:
351                         ufs_clear_opt (*mount_options, UFSTYPE);
352                         ufs_set_opt (*mount_options, UFSTYPE_HP);
353                         break;
354                 case Opt_type_nextstepcd:
355                         ufs_clear_opt (*mount_options, UFSTYPE);
356                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
357                         break;
358                 case Opt_type_nextstep:
359                         ufs_clear_opt (*mount_options, UFSTYPE);
360                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
361                         break;
362                 case Opt_type_openstep:
363                         ufs_clear_opt (*mount_options, UFSTYPE);
364                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
365                         break;
366                 case Opt_onerror_panic:
367                         ufs_clear_opt (*mount_options, ONERROR);
368                         ufs_set_opt (*mount_options, ONERROR_PANIC);
369                         break;
370                 case Opt_onerror_lock:
371                         ufs_clear_opt (*mount_options, ONERROR);
372                         ufs_set_opt (*mount_options, ONERROR_LOCK);
373                         break;
374                 case Opt_onerror_umount:
375                         ufs_clear_opt (*mount_options, ONERROR);
376                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
377                         break;
378                 case Opt_onerror_repair:
379                         printk("UFS-fs: Unable to do repair on error, "
380                                 "will lock lock instead\n");
381                         ufs_clear_opt (*mount_options, ONERROR);
382                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
383                         break;
384                 default:
385                         printk("UFS-fs: Invalid option: \"%s\" "
386                                         "or missing value\n", p);
387                         return 0;
388                 }
389         }
390         return 1;
391 }
392
393 /*
394  * Diffrent types of UFS hold fs_cstotal in different
395  * places, and use diffrent data structure for it.
396  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
397  */
398 static void ufs_setup_cstotal(struct super_block *sb)
399 {
400         struct ufs_sb_info *sbi = UFS_SB(sb);
401         struct ufs_sb_private_info *uspi = sbi->s_uspi;
402         struct ufs_super_block_first *usb1;
403         struct ufs_super_block_second *usb2;
404         struct ufs_super_block_third *usb3;
405         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
406
407         UFSD("ENTER, mtype=%u\n", mtype);
408         usb1 = ubh_get_usb_first(uspi);
409         usb2 = ubh_get_usb_second(uspi);
410         usb3 = ubh_get_usb_third(uspi);
411
412         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
413              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
414             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
415                 /*we have statistic in different place, then usual*/
416                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
417                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
418                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
419                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
420         } else {
421                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
422                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
423                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
424                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
425         }
426         UFSD("EXIT\n");
427 }
428
429 /*
430  * Read on-disk structures associated with cylinder groups
431  */
432 static int ufs_read_cylinder_structures(struct super_block *sb)
433 {
434         struct ufs_sb_info *sbi = UFS_SB(sb);
435         struct ufs_sb_private_info *uspi = sbi->s_uspi;
436         struct ufs_buffer_head * ubh;
437         unsigned char * base, * space;
438         unsigned size, blks, i;
439         struct ufs_super_block_third *usb3;
440
441         UFSD("ENTER\n");
442
443         usb3 = ubh_get_usb_third(uspi);
444         /*
445          * Read cs structures from (usually) first data block
446          * on the device. 
447          */
448         size = uspi->s_cssize;
449         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
450         base = space = kmalloc(size, GFP_KERNEL);
451         if (!base)
452                 goto failed; 
453         sbi->s_csp = (struct ufs_csum *)space;
454         for (i = 0; i < blks; i += uspi->s_fpb) {
455                 size = uspi->s_bsize;
456                 if (i + uspi->s_fpb > blks)
457                         size = (blks - i) * uspi->s_fsize;
458
459                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
460                 
461                 if (!ubh)
462                         goto failed;
463
464                 ubh_ubhcpymem (space, ubh, size);
465
466                 space += size;
467                 ubh_brelse (ubh);
468                 ubh = NULL;
469         }
470
471         /*
472          * Read cylinder group (we read only first fragment from block
473          * at this time) and prepare internal data structures for cg caching.
474          */
475         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
476                 goto failed;
477         for (i = 0; i < uspi->s_ncg; i++) 
478                 sbi->s_ucg[i] = NULL;
479         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
480                 sbi->s_ucpi[i] = NULL;
481                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
482         }
483         for (i = 0; i < uspi->s_ncg; i++) {
484                 UFSD("read cg %u\n", i);
485                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
486                         goto failed;
487                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
488                         goto failed;
489
490                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
491         }
492         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
493                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
494                         goto failed;
495                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
496         }
497         sbi->s_cg_loaded = 0;
498         UFSD("EXIT\n");
499         return 1;
500
501 failed:
502         kfree (base);
503         if (sbi->s_ucg) {
504                 for (i = 0; i < uspi->s_ncg; i++)
505                         if (sbi->s_ucg[i])
506                                 brelse (sbi->s_ucg[i]);
507                 kfree (sbi->s_ucg);
508                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
509                         kfree (sbi->s_ucpi[i]);
510         }
511         UFSD("EXIT (FAILED)\n");
512         return 0;
513 }
514
515 /*
516  * Sync our internal copy of fs_cstotal with disk
517  */
518 static void ufs_put_cstotal(struct super_block *sb)
519 {
520         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
521         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
522         struct ufs_super_block_first *usb1;
523         struct ufs_super_block_second *usb2;
524         struct ufs_super_block_third *usb3;
525
526         UFSD("ENTER\n");
527         usb1 = ubh_get_usb_first(uspi);
528         usb2 = ubh_get_usb_second(uspi);
529         usb3 = ubh_get_usb_third(uspi);
530
531         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
532              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
533             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
534                 /*we have statistic in different place, then usual*/
535                 usb2->fs_un.fs_u2.cs_ndir =
536                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
537                 usb2->fs_un.fs_u2.cs_nbfree =
538                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
539                 usb3->fs_un1.fs_u2.cs_nifree =
540                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
541                 usb3->fs_un1.fs_u2.cs_nffree =
542                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
543         } else {
544                 usb1->fs_cstotal.cs_ndir =
545                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
546                 usb1->fs_cstotal.cs_nbfree =
547                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
548                 usb1->fs_cstotal.cs_nifree =
549                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
550                 usb1->fs_cstotal.cs_nffree =
551                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
552         }
553         ubh_mark_buffer_dirty(USPI_UBH(uspi));
554         ufs_print_super_stuff(sb, usb1, usb2, usb3);
555         UFSD("EXIT\n");
556 }
557
558 /**
559  * ufs_put_super_internal() - put on-disk intrenal structures
560  * @sb: pointer to super_block structure
561  * Put on-disk structures associated with cylinder groups
562  * and write them back to disk, also update cs_total on disk
563  */
564 static void ufs_put_super_internal(struct super_block *sb)
565 {
566         struct ufs_sb_info *sbi = UFS_SB(sb);
567         struct ufs_sb_private_info *uspi = sbi->s_uspi;
568         struct ufs_buffer_head * ubh;
569         unsigned char * base, * space;
570         unsigned blks, size, i;
571
572         
573         UFSD("ENTER\n");
574         ufs_put_cstotal(sb);
575         size = uspi->s_cssize;
576         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
577         base = space = (char*) sbi->s_csp;
578         for (i = 0; i < blks; i += uspi->s_fpb) {
579                 size = uspi->s_bsize;
580                 if (i + uspi->s_fpb > blks)
581                         size = (blks - i) * uspi->s_fsize;
582
583                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
584
585                 ubh_memcpyubh (ubh, space, size);
586                 space += size;
587                 ubh_mark_buffer_uptodate (ubh, 1);
588                 ubh_mark_buffer_dirty (ubh);
589                 ubh_brelse (ubh);
590         }
591         for (i = 0; i < sbi->s_cg_loaded; i++) {
592                 ufs_put_cylinder (sb, i);
593                 kfree (sbi->s_ucpi[i]);
594         }
595         for (; i < UFS_MAX_GROUP_LOADED; i++) 
596                 kfree (sbi->s_ucpi[i]);
597         for (i = 0; i < uspi->s_ncg; i++) 
598                 brelse (sbi->s_ucg[i]);
599         kfree (sbi->s_ucg);
600         kfree (base);
601         UFSD("EXIT\n");
602 }
603
604 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
605 {
606         struct ufs_sb_info * sbi;
607         struct ufs_sb_private_info * uspi;
608         struct ufs_super_block_first * usb1;
609         struct ufs_super_block_second * usb2;
610         struct ufs_super_block_third * usb3;
611         struct ufs_buffer_head * ubh;   
612         struct inode *inode;
613         unsigned block_size, super_block_size;
614         unsigned flags;
615         unsigned super_block_offset;
616
617         uspi = NULL;
618         ubh = NULL;
619         flags = 0;
620         
621         UFSD("ENTER\n");
622                 
623         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
624         if (!sbi)
625                 goto failed_nomem;
626         sb->s_fs_info = sbi;
627
628         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
629         
630 #ifndef CONFIG_UFS_FS_WRITE
631         if (!(sb->s_flags & MS_RDONLY)) {
632                 printk("ufs was compiled with read-only support, "
633                 "can't be mounted as read-write\n");
634                 goto failed;
635         }
636 #endif
637         /*
638          * Set default mount options
639          * Parse mount options
640          */
641         sbi->s_mount_opt = 0;
642         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
643         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
644                 printk("wrong mount options\n");
645                 goto failed;
646         }
647         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
648                 if (!silent)
649                         printk("You didn't specify the type of your ufs filesystem\n\n"
650                         "mount -t ufs -o ufstype="
651                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
652                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
653                         "default is ufstype=old\n");
654                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
655         }
656
657         sbi->s_uspi = uspi =
658                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
659         if (!uspi)
660                 goto failed;
661         uspi->s_dirblksize = UFS_SECTOR_SIZE;
662         super_block_offset=UFS_SBLOCK;
663
664         /* Keep 2Gig file limit. Some UFS variants need to override 
665            this but as I don't know which I'll let those in the know loosen
666            the rules */
667         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
668         case UFS_MOUNT_UFSTYPE_44BSD:
669                 UFSD("ufstype=44bsd\n");
670                 uspi->s_fsize = block_size = 512;
671                 uspi->s_fmask = ~(512 - 1);
672                 uspi->s_fshift = 9;
673                 uspi->s_sbsize = super_block_size = 1536;
674                 uspi->s_sbbase = 0;
675                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
676                 break;
677         case UFS_MOUNT_UFSTYPE_UFS2:
678                 UFSD("ufstype=ufs2\n");
679                 super_block_offset=SBLOCK_UFS2;
680                 uspi->s_fsize = block_size = 512;
681                 uspi->s_fmask = ~(512 - 1);
682                 uspi->s_fshift = 9;
683                 uspi->s_sbsize = super_block_size = 1536;
684                 uspi->s_sbbase =  0;
685                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
686                 break;
687                 
688         case UFS_MOUNT_UFSTYPE_SUN:
689                 UFSD("ufstype=sun\n");
690                 uspi->s_fsize = block_size = 1024;
691                 uspi->s_fmask = ~(1024 - 1);
692                 uspi->s_fshift = 10;
693                 uspi->s_sbsize = super_block_size = 2048;
694                 uspi->s_sbbase = 0;
695                 uspi->s_maxsymlinklen = 56;
696                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
697                 break;
698
699         case UFS_MOUNT_UFSTYPE_SUNx86:
700                 UFSD("ufstype=sunx86\n");
701                 uspi->s_fsize = block_size = 1024;
702                 uspi->s_fmask = ~(1024 - 1);
703                 uspi->s_fshift = 10;
704                 uspi->s_sbsize = super_block_size = 2048;
705                 uspi->s_sbbase = 0;
706                 uspi->s_maxsymlinklen = 56;
707                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
708                 break;
709
710         case UFS_MOUNT_UFSTYPE_OLD:
711                 UFSD("ufstype=old\n");
712                 uspi->s_fsize = block_size = 1024;
713                 uspi->s_fmask = ~(1024 - 1);
714                 uspi->s_fshift = 10;
715                 uspi->s_sbsize = super_block_size = 2048;
716                 uspi->s_sbbase = 0;
717                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
718                 if (!(sb->s_flags & MS_RDONLY)) {
719                         if (!silent)
720                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
721                         sb->s_flags |= MS_RDONLY;
722                 }
723                 break;
724         
725         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
726                 /*TODO: check may be we need set special dir block size?*/
727                 UFSD("ufstype=nextstep\n");
728                 uspi->s_fsize = block_size = 1024;
729                 uspi->s_fmask = ~(1024 - 1);
730                 uspi->s_fshift = 10;
731                 uspi->s_sbsize = super_block_size = 2048;
732                 uspi->s_sbbase = 0;
733                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
734                 if (!(sb->s_flags & MS_RDONLY)) {
735                         if (!silent)
736                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
737                         sb->s_flags |= MS_RDONLY;
738                 }
739                 break;
740         
741         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
742                 /*TODO: check may be we need set special dir block size?*/
743                 UFSD("ufstype=nextstep-cd\n");
744                 uspi->s_fsize = block_size = 2048;
745                 uspi->s_fmask = ~(2048 - 1);
746                 uspi->s_fshift = 11;
747                 uspi->s_sbsize = super_block_size = 2048;
748                 uspi->s_sbbase = 0;
749                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
750                 if (!(sb->s_flags & MS_RDONLY)) {
751                         if (!silent)
752                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
753                         sb->s_flags |= MS_RDONLY;
754                 }
755                 break;
756         
757         case UFS_MOUNT_UFSTYPE_OPENSTEP:
758                 UFSD("ufstype=openstep\n");
759                 uspi->s_fsize = block_size = 1024;
760                 uspi->s_fmask = ~(1024 - 1);
761                 uspi->s_fshift = 10;
762                 uspi->s_sbsize = super_block_size = 2048;
763                 uspi->s_sbbase = 0;
764                 uspi->s_dirblksize = 1024;
765                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
766                 if (!(sb->s_flags & MS_RDONLY)) {
767                         if (!silent)
768                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
769                         sb->s_flags |= MS_RDONLY;
770                 }
771                 break;
772         
773         case UFS_MOUNT_UFSTYPE_HP:
774                 UFSD("ufstype=hp\n");
775                 uspi->s_fsize = block_size = 1024;
776                 uspi->s_fmask = ~(1024 - 1);
777                 uspi->s_fshift = 10;
778                 uspi->s_sbsize = super_block_size = 2048;
779                 uspi->s_sbbase = 0;
780                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
781                 if (!(sb->s_flags & MS_RDONLY)) {
782                         if (!silent)
783                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
784                         sb->s_flags |= MS_RDONLY;
785                 }
786                 break;
787         default:
788                 if (!silent)
789                         printk("unknown ufstype\n");
790                 goto failed;
791         }
792         
793 again:  
794         if (!sb_set_blocksize(sb, block_size)) {
795                 printk(KERN_ERR "UFS: failed to set blocksize\n");
796                 goto failed;
797         }
798
799         /*
800          * read ufs super block from device
801          */
802
803         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
804         
805         if (!ubh) 
806             goto failed;
807
808         
809         usb1 = ubh_get_usb_first(uspi);
810         usb2 = ubh_get_usb_second(uspi);
811         usb3 = ubh_get_usb_third(uspi);
812
813         /*
814          * Check ufs magic number
815          */
816         sbi->s_bytesex = BYTESEX_LE;
817         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
818                 case UFS_MAGIC:
819                 case UFS2_MAGIC:
820                 case UFS_MAGIC_LFN:
821                 case UFS_MAGIC_FEA:
822                 case UFS_MAGIC_4GB:
823                         goto magic_found;
824         }
825         sbi->s_bytesex = BYTESEX_BE;
826         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
827                 case UFS_MAGIC:
828                 case UFS2_MAGIC:
829                 case UFS_MAGIC_LFN:
830                 case UFS_MAGIC_FEA:
831                 case UFS_MAGIC_4GB:
832                         goto magic_found;
833         }
834
835         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
836           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
837           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
838           && uspi->s_sbbase < 256) {
839                 ubh_brelse_uspi(uspi);
840                 ubh = NULL;
841                 uspi->s_sbbase += 8;
842                 goto again;
843         }
844         if (!silent)
845                 printk("ufs_read_super: bad magic number\n");
846         goto failed;
847
848 magic_found:
849         /*
850          * Check block and fragment sizes
851          */
852         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
853         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
854         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
855         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
856         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
857
858         if (!is_power_of_2(uspi->s_fsize)) {
859                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
860                         uspi->s_fsize);
861                         goto failed;
862         }
863         if (uspi->s_fsize < 512) {
864                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
865                         uspi->s_fsize);
866                 goto failed;
867         }
868         if (uspi->s_fsize > 4096) {
869                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
870                         uspi->s_fsize);
871                 goto failed;
872         }
873         if (!is_power_of_2(uspi->s_bsize)) {
874                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
875                         uspi->s_bsize);
876                 goto failed;
877         }
878         if (uspi->s_bsize < 4096) {
879                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
880                         uspi->s_bsize);
881                 goto failed;
882         }
883         if (uspi->s_bsize / uspi->s_fsize > 8) {
884                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
885                         uspi->s_bsize / uspi->s_fsize);
886                 goto failed;
887         }
888         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
889                 ubh_brelse_uspi(uspi);
890                 ubh = NULL;
891                 block_size = uspi->s_fsize;
892                 super_block_size = uspi->s_sbsize;
893                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
894                 goto again;
895         }
896
897         sbi->s_flags = flags;/*after that line some functions use s_flags*/
898         ufs_print_super_stuff(sb, usb1, usb2, usb3);
899
900         /*
901          * Check, if file system was correctly unmounted.
902          * If not, make it read only.
903          */
904         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
905           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
906           (((flags & UFS_ST_MASK) == UFS_ST_SUN || 
907           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 
908           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
909                 switch(usb1->fs_clean) {
910                 case UFS_FSCLEAN:
911                         UFSD("fs is clean\n");
912                         break;
913                 case UFS_FSSTABLE:
914                         UFSD("fs is stable\n");
915                         break;
916                 case UFS_FSOSF1:
917                         UFSD("fs is DEC OSF/1\n");
918                         break;
919                 case UFS_FSACTIVE:
920                         printk("ufs_read_super: fs is active\n");
921                         sb->s_flags |= MS_RDONLY;
922                         break;
923                 case UFS_FSBAD:
924                         printk("ufs_read_super: fs is bad\n");
925                         sb->s_flags |= MS_RDONLY;
926                         break;
927                 default:
928                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
929                         sb->s_flags |= MS_RDONLY;
930                         break;
931                 }
932         } else {
933                 printk("ufs_read_super: fs needs fsck\n");
934                 sb->s_flags |= MS_RDONLY;
935         }
936
937         /*
938          * Read ufs_super_block into internal data structures
939          */
940         sb->s_op = &ufs_super_ops;
941         sb->dq_op = NULL; /***/
942         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
943
944         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
945         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
946         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
947         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
948         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
949         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
950
951         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
952                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
953                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
954         } else {
955                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
956                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
957         }
958
959         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
960         /* s_bsize already set */
961         /* s_fsize already set */
962         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
963         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
964         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
965         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
966         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
967         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
968         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
969                 uspi->s_fshift);
970         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
971         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
972         /* s_sbsize already set */
973         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
974         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
975         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
976         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
977         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
978         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
979         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
980         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
981
982         if (uspi->fs_magic == UFS2_MAGIC)
983                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
984         else
985                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
986
987         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
988         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
989         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
990         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
991         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
992         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
993         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
994         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
995         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
996         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
997         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
998         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
999         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1000         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1001         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1002
1003         /*
1004          * Compute another frequently used values
1005          */
1006         uspi->s_fpbmask = uspi->s_fpb - 1;
1007         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1008                 uspi->s_apbshift = uspi->s_bshift - 3;
1009         else
1010                 uspi->s_apbshift = uspi->s_bshift - 2;
1011
1012         uspi->s_2apbshift = uspi->s_apbshift * 2;
1013         uspi->s_3apbshift = uspi->s_apbshift * 3;
1014         uspi->s_apb = 1 << uspi->s_apbshift;
1015         uspi->s_2apb = 1 << uspi->s_2apbshift;
1016         uspi->s_3apb = 1 << uspi->s_3apbshift;
1017         uspi->s_apbmask = uspi->s_apb - 1;
1018         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1019         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1020         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1021         uspi->s_bpf = uspi->s_fsize << 3;
1022         uspi->s_bpfshift = uspi->s_fshift + 3;
1023         uspi->s_bpfmask = uspi->s_bpf - 1;
1024         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1025             UFS_MOUNT_UFSTYPE_44BSD)
1026                 uspi->s_maxsymlinklen =
1027                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1028
1029         inode = iget(sb, UFS_ROOTINO);
1030         if (!inode || is_bad_inode(inode))
1031                 goto failed;
1032         sb->s_root = d_alloc_root(inode);
1033         if (!sb->s_root)
1034                 goto dalloc_failed;
1035
1036         ufs_setup_cstotal(sb);
1037         /*
1038          * Read cylinder group structures
1039          */
1040         if (!(sb->s_flags & MS_RDONLY))
1041                 if (!ufs_read_cylinder_structures(sb))
1042                         goto failed;
1043
1044         UFSD("EXIT\n");
1045         return 0;
1046
1047 dalloc_failed:
1048         iput(inode);
1049 failed:
1050         if (ubh)
1051                 ubh_brelse_uspi (uspi);
1052         kfree (uspi);
1053         kfree(sbi);
1054         sb->s_fs_info = NULL;
1055         UFSD("EXIT (FAILED)\n");
1056         return -EINVAL;
1057
1058 failed_nomem:
1059         UFSD("EXIT (NOMEM)\n");
1060         return -ENOMEM;
1061 }
1062
1063 static void ufs_write_super(struct super_block *sb)
1064 {
1065         struct ufs_sb_private_info * uspi;
1066         struct ufs_super_block_first * usb1;
1067         struct ufs_super_block_third * usb3;
1068         unsigned flags;
1069
1070         lock_kernel();
1071         UFSD("ENTER\n");
1072         flags = UFS_SB(sb)->s_flags;
1073         uspi = UFS_SB(sb)->s_uspi;
1074         usb1 = ubh_get_usb_first(uspi);
1075         usb3 = ubh_get_usb_third(uspi);
1076
1077         if (!(sb->s_flags & MS_RDONLY)) {
1078                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1079                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
1080                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1081                         ufs_set_fs_state(sb, usb1, usb3,
1082                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1083                 ufs_put_cstotal(sb);
1084         }
1085         sb->s_dirt = 0;
1086         UFSD("EXIT\n");
1087         unlock_kernel();
1088 }
1089
1090 static void ufs_put_super(struct super_block *sb)
1091 {
1092         struct ufs_sb_info * sbi = UFS_SB(sb);
1093                 
1094         UFSD("ENTER\n");
1095
1096         if (!(sb->s_flags & MS_RDONLY))
1097                 ufs_put_super_internal(sb);
1098         
1099         ubh_brelse_uspi (sbi->s_uspi);
1100         kfree (sbi->s_uspi);
1101         kfree (sbi);
1102         sb->s_fs_info = NULL;
1103         UFSD("EXIT\n");
1104         return;
1105 }
1106
1107
1108 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1109 {
1110         struct ufs_sb_private_info * uspi;
1111         struct ufs_super_block_first * usb1;
1112         struct ufs_super_block_third * usb3;
1113         unsigned new_mount_opt, ufstype;
1114         unsigned flags;
1115         
1116         uspi = UFS_SB(sb)->s_uspi;
1117         flags = UFS_SB(sb)->s_flags;
1118         usb1 = ubh_get_usb_first(uspi);
1119         usb3 = ubh_get_usb_third(uspi);
1120         
1121         /*
1122          * Allow the "check" option to be passed as a remount option.
1123          * It is not possible to change ufstype option during remount
1124          */
1125         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1126         new_mount_opt = 0;
1127         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1128         if (!ufs_parse_options (data, &new_mount_opt))
1129                 return -EINVAL;
1130         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1131                 new_mount_opt |= ufstype;
1132         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1133                 printk("ufstype can't be changed during remount\n");
1134                 return -EINVAL;
1135         }
1136
1137         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1138                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1139                 return 0;
1140         }
1141         
1142         /*
1143          * fs was mouted as rw, remounting ro
1144          */
1145         if (*mount_flags & MS_RDONLY) {
1146                 ufs_put_super_internal(sb);
1147                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1148                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1149                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
1150                         ufs_set_fs_state(sb, usb1, usb3,
1151                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1152                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1153                 sb->s_dirt = 0;
1154                 sb->s_flags |= MS_RDONLY;
1155         } else {
1156         /*
1157          * fs was mounted as ro, remounting rw
1158          */
1159 #ifndef CONFIG_UFS_FS_WRITE
1160                 printk("ufs was compiled with read-only support, "
1161                 "can't be mounted as read-write\n");
1162                 return -EINVAL;
1163 #else
1164                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
1165                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1166                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1167                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1168                         printk("this ufstype is read-only supported\n");
1169                         return -EINVAL;
1170                 }
1171                 if (!ufs_read_cylinder_structures(sb)) {
1172                         printk("failed during remounting\n");
1173                         return -EPERM;
1174                 }
1175                 sb->s_flags &= ~MS_RDONLY;
1176 #endif
1177         }
1178         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1179         return 0;
1180 }
1181
1182 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1183 {
1184         struct super_block *sb = dentry->d_sb;
1185         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1186         unsigned  flags = UFS_SB(sb)->s_flags;
1187         struct ufs_super_block_first *usb1;
1188         struct ufs_super_block_second *usb2;
1189         struct ufs_super_block_third *usb3;
1190
1191         lock_kernel();
1192
1193         usb1 = ubh_get_usb_first(uspi);
1194         usb2 = ubh_get_usb_second(uspi);
1195         usb3 = ubh_get_usb_third(uspi);
1196         
1197         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1198                 buf->f_type = UFS2_MAGIC;
1199                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1200         } else {
1201                 buf->f_type = UFS_MAGIC;
1202                 buf->f_blocks = uspi->s_dsize;
1203         }
1204         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1205                 uspi->cs_total.cs_nffree;
1206         buf->f_ffree = uspi->cs_total.cs_nifree;
1207         buf->f_bsize = sb->s_blocksize;
1208         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1209                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1210         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1211         buf->f_namelen = UFS_MAXNAMLEN;
1212
1213         unlock_kernel();
1214
1215         return 0;
1216 }
1217
1218 static struct kmem_cache * ufs_inode_cachep;
1219
1220 static struct inode *ufs_alloc_inode(struct super_block *sb)
1221 {
1222         struct ufs_inode_info *ei;
1223         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1224         if (!ei)
1225                 return NULL;
1226         ei->vfs_inode.i_version = 1;
1227         return &ei->vfs_inode;
1228 }
1229
1230 static void ufs_destroy_inode(struct inode *inode)
1231 {
1232         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1233 }
1234
1235 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1236 {
1237         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1238
1239         inode_init_once(&ei->vfs_inode);
1240 }
1241
1242 static int init_inodecache(void)
1243 {
1244         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1245                                              sizeof(struct ufs_inode_info),
1246                                              0, (SLAB_RECLAIM_ACCOUNT|
1247                                                 SLAB_MEM_SPREAD),
1248                                              init_once);
1249         if (ufs_inode_cachep == NULL)
1250                 return -ENOMEM;
1251         return 0;
1252 }
1253
1254 static void destroy_inodecache(void)
1255 {
1256         kmem_cache_destroy(ufs_inode_cachep);
1257 }
1258
1259 #ifdef CONFIG_QUOTA
1260 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1261 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1262 #endif
1263
1264 static const struct super_operations ufs_super_ops = {
1265         .alloc_inode    = ufs_alloc_inode,
1266         .destroy_inode  = ufs_destroy_inode,
1267         .read_inode     = ufs_read_inode,
1268         .write_inode    = ufs_write_inode,
1269         .delete_inode   = ufs_delete_inode,
1270         .put_super      = ufs_put_super,
1271         .write_super    = ufs_write_super,
1272         .statfs         = ufs_statfs,
1273         .remount_fs     = ufs_remount,
1274 #ifdef CONFIG_QUOTA
1275         .quota_read     = ufs_quota_read,
1276         .quota_write    = ufs_quota_write,
1277 #endif
1278 };
1279
1280 #ifdef CONFIG_QUOTA
1281
1282 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1283  * acquiring the locks... As quota files are never truncated and quota code
1284  * itself serializes the operations (and noone else should touch the files)
1285  * we don't have to be afraid of races */
1286 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1287                                size_t len, loff_t off)
1288 {
1289         struct inode *inode = sb_dqopt(sb)->files[type];
1290         sector_t blk = off >> sb->s_blocksize_bits;
1291         int err = 0;
1292         int offset = off & (sb->s_blocksize - 1);
1293         int tocopy;
1294         size_t toread;
1295         struct buffer_head *bh;
1296         loff_t i_size = i_size_read(inode);
1297
1298         if (off > i_size)
1299                 return 0;
1300         if (off+len > i_size)
1301                 len = i_size-off;
1302         toread = len;
1303         while (toread > 0) {
1304                 tocopy = sb->s_blocksize - offset < toread ?
1305                                 sb->s_blocksize - offset : toread;
1306
1307                 bh = ufs_bread(inode, blk, 0, &err);
1308                 if (err)
1309                         return err;
1310                 if (!bh)        /* A hole? */
1311                         memset(data, 0, tocopy);
1312                 else {
1313                         memcpy(data, bh->b_data+offset, tocopy);
1314                         brelse(bh);
1315                 }
1316                 offset = 0;
1317                 toread -= tocopy;
1318                 data += tocopy;
1319                 blk++;
1320         }
1321         return len;
1322 }
1323
1324 /* Write to quotafile */
1325 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1326                                 const char *data, size_t len, loff_t off)
1327 {
1328         struct inode *inode = sb_dqopt(sb)->files[type];
1329         sector_t blk = off >> sb->s_blocksize_bits;
1330         int err = 0;
1331         int offset = off & (sb->s_blocksize - 1);
1332         int tocopy;
1333         size_t towrite = len;
1334         struct buffer_head *bh;
1335
1336         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1337         while (towrite > 0) {
1338                 tocopy = sb->s_blocksize - offset < towrite ?
1339                                 sb->s_blocksize - offset : towrite;
1340
1341                 bh = ufs_bread(inode, blk, 1, &err);
1342                 if (!bh)
1343                         goto out;
1344                 lock_buffer(bh);
1345                 memcpy(bh->b_data+offset, data, tocopy);
1346                 flush_dcache_page(bh->b_page);
1347                 set_buffer_uptodate(bh);
1348                 mark_buffer_dirty(bh);
1349                 unlock_buffer(bh);
1350                 brelse(bh);
1351                 offset = 0;
1352                 towrite -= tocopy;
1353                 data += tocopy;
1354                 blk++;
1355         }
1356 out:
1357         if (len == towrite) {
1358                 mutex_unlock(&inode->i_mutex);
1359                 return err;
1360         }
1361         if (inode->i_size < off+len-towrite)
1362                 i_size_write(inode, off+len-towrite);
1363         inode->i_version++;
1364         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1365         mark_inode_dirty(inode);
1366         mutex_unlock(&inode->i_mutex);
1367         return len - towrite;
1368 }
1369
1370 #endif
1371
1372 static int ufs_get_sb(struct file_system_type *fs_type,
1373         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1374 {
1375         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1376 }
1377
1378 static struct file_system_type ufs_fs_type = {
1379         .owner          = THIS_MODULE,
1380         .name           = "ufs",
1381         .get_sb         = ufs_get_sb,
1382         .kill_sb        = kill_block_super,
1383         .fs_flags       = FS_REQUIRES_DEV,
1384 };
1385
1386 static int __init init_ufs_fs(void)
1387 {
1388         int err = init_inodecache();
1389         if (err)
1390                 goto out1;
1391         err = register_filesystem(&ufs_fs_type);
1392         if (err)
1393                 goto out;
1394         return 0;
1395 out:
1396         destroy_inodecache();
1397 out1:
1398         return err;
1399 }
1400
1401 static void __exit exit_ufs_fs(void)
1402 {
1403         unregister_filesystem(&ufs_fs_type);
1404         destroy_inodecache();
1405 }
1406
1407 module_init(init_ufs_fs)
1408 module_exit(exit_ufs_fs)
1409 MODULE_LICENSE("GPL");