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