fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gertjan@cs.vu.nl>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  */
  65
  66
  67 #include <linux/config.h>
  68 #include <linux/module.h>
  69 #include <linux/bitops.h>
  70
  71 #include <stdarg.h>
  72
  73 #include <asm/uaccess.h>
  74 #include <asm/system.h>
  75
  76 #include <linux/errno.h>
  77 #include <linux/fs.h>
  78 #include <linux/ufs_fs.h>
  79 #include <linux/slab.h>
  80 #include <linux/time.h>
  81 #include <linux/stat.h>
  82 #include <linux/string.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/init.h>
  85 #include <linux/parser.h>
  86 #include <linux/smp_lock.h>
  87 #include <linux/buffer_head.h>
  88 #include <linux/vfs.h>
  89
  90 #include "swab.h"
  91 #include "util.h"
  92
  93 #ifdef CONFIG_UFS_DEBUG
  94 /*
  95  * Print contents of ufs_super_block, useful for debugging
  96  */
  97 static void ufs_print_super_stuff(struct super_block *sb, unsigned flags,
  98                                   struct ufs_super_block_first *usb1,
  99                                   struct ufs_super_block_second *usb2,
 100                                   struct ufs_super_block_third *usb3)
 101 {
 102         printk("ufs_print_super_stuff\n");
 103         printk("  magic:     0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
 104         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 105                 printk("  fs_size:   %llu\n", (unsigned long long)
 106                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 107                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 108                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 109                 printk("  bsize:         %u\n",
 110                        fs32_to_cpu(sb, usb1->fs_bsize));
 111                 printk("  fsize:         %u\n",
 112                        fs32_to_cpu(sb, usb1->fs_fsize));
 113                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 114                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 115                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 116                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 117                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 118                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 119                        (unsigned long long)
 120                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 121         } else {
 122                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 123                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 124                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 125                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 126                 printk(" cgoffset:    %u\n",
 127                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 128                 printk(" ~cgmask:     0x%x\n",
 129                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 130                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 131                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 132                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 133                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 134                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 135                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 136                 printk(" fragshift:   %u\n",
 137                        fs32_to_cpu(sb, usb1->fs_fragshift));
 138                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 139                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 140                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 141                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 142                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 143                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 144                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 145                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 146                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 147                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 148                 printk(" fstodb:      %u\n",
 149                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 150                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 151                 printk(" ndir         %u\n",
 152                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 153                 printk(" nifree       %u\n",
 154                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 155                 printk(" nbfree       %u\n",
 156                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 157                 printk(" nffree       %u\n",
 158                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 159         }
 160         printk("\n");
 161 }
 162
 163 /*
 164  * Print contents of ufs_cylinder_group, useful for debugging
 165  */
 166 static void ufs_print_cylinder_stuff(struct super_block *sb,
 167                                      struct ufs_cylinder_group *cg)
 168 {
 169         printk("\nufs_print_cylinder_stuff\n");
 170         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 171         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 172         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 173         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 174         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 175         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 176         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 177         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 178         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 179         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 180         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 181         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 182         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 183         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 184         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 185             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 186             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 187             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 188             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 189         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 190         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 191         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 192         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 193         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 194         printk("  clustersumoff %u\n",
 195                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 196         printk("  clusteroff    %u\n",
 197                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 198         printk("  nclusterblks  %u\n",
 199                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 200         printk("\n");
 201 }
 202 #else
 203 #  define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/
 204 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 205 #endif /* CONFIG_UFS_DEBUG */
 206
 207 static struct super_operations ufs_super_ops;
 208
 209 static char error_buf[1024];
 210
 211 void ufs_error (struct super_block * sb, const char * function,
 212         const char * fmt, ...)
 213 {
 214         struct ufs_sb_private_info * uspi;
 215         struct ufs_super_block_first * usb1;
 216         va_list args;
 217
 218         uspi = UFS_SB(sb)->s_uspi;
 219         usb1 = ubh_get_usb_first(uspi);
 220
 221         if (!(sb->s_flags & MS_RDONLY)) {
 222                 usb1->fs_clean = UFS_FSBAD;
 223                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 224                 sb->s_dirt = 1;
 225                 sb->s_flags |= MS_RDONLY;
 226         }
 227         va_start (args, fmt);
 228         vsprintf (error_buf, fmt, args);
 229         va_end (args);
 230         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 231         case UFS_MOUNT_ONERROR_PANIC:
 232                 panic ("UFS-fs panic (device %s): %s: %s\n",
 233                         sb->s_id, function, error_buf);
 234
 235         case UFS_MOUNT_ONERROR_LOCK:
 236         case UFS_MOUNT_ONERROR_UMOUNT:
 237         case UFS_MOUNT_ONERROR_REPAIR:
 238                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 239                         sb->s_id, function, error_buf);
 240         }
 241 }
 242
 243 void ufs_panic (struct super_block * sb, const char * function,
 244         const char * fmt, ...)
 245 {
 246         struct ufs_sb_private_info * uspi;
 247         struct ufs_super_block_first * usb1;
 248         va_list args;
 249
 250         uspi = UFS_SB(sb)->s_uspi;
 251         usb1 = ubh_get_usb_first(uspi);
 252
 253         if (!(sb->s_flags & MS_RDONLY)) {
 254                 usb1->fs_clean = UFS_FSBAD;
 255                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 256                 sb->s_dirt = 1;
 257         }
 258         va_start (args, fmt);
 259         vsprintf (error_buf, fmt, args);
 260         va_end (args);
 261         sb->s_flags |= MS_RDONLY;
 262         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 263                 sb->s_id, function, error_buf);
 264 }
 265
 266 void ufs_warning (struct super_block * sb, const char * function,
 267         const char * fmt, ...)
 268 {
 269         va_list args;
 270
 271         va_start (args, fmt);
 272         vsprintf (error_buf, fmt, args);
 273         va_end (args);
 274         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 275                 sb->s_id, function, error_buf);
 276 }
 277
 278 enum {
 279         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
 280         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 281         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 282         Opt_onerror_umount, Opt_onerror_repair, Opt_err
 283 };
 284
 285 static match_table_t tokens = {
 286         {Opt_type_old, "ufstype=old"},
 287         {Opt_type_sunx86, "ufstype=sunx86"},
 288         {Opt_type_sun, "ufstype=sun"},
 289         {Opt_type_44bsd, "ufstype=44bsd"},
 290         {Opt_type_ufs2, "ufstype=ufs2"},
 291         {Opt_type_ufs2, "ufstype=5xbsd"},
 292         {Opt_type_hp, "ufstype=hp"},
 293         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 294         {Opt_type_nextstep, "ufstype=nextstep"},
 295         {Opt_type_openstep, "ufstype=openstep"},
 296         {Opt_onerror_panic, "onerror=panic"},
 297         {Opt_onerror_lock, "onerror=lock"},
 298         {Opt_onerror_umount, "onerror=umount"},
 299         {Opt_onerror_repair, "onerror=repair"},
 300         {Opt_err, NULL}
 301 };
 302
 303 static int ufs_parse_options (char * options, unsigned * mount_options)
 304 {
 305         char * p;
 306
 307         UFSD("ENTER\n");
 308
 309         if (!options)
 310                 return 1;
 311
 312         while ((p = strsep(&options, ",")) != NULL) {
 313                 substring_t args[MAX_OPT_ARGS];
 314                 int token;
 315                 if (!*p)
 316                         continue;
 317
 318                 token = match_token(p, tokens, args);
 319                 switch (token) {
 320                 case Opt_type_old:
 321                         ufs_clear_opt (*mount_options, UFSTYPE);
 322                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 323                         break;
 324                 case Opt_type_sunx86:
 325                         ufs_clear_opt (*mount_options, UFSTYPE);
 326                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 327                         break;
 328                 case Opt_type_sun:
 329                         ufs_clear_opt (*mount_options, UFSTYPE);
 330                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 331                         break;
 332                 case Opt_type_44bsd:
 333                         ufs_clear_opt (*mount_options, UFSTYPE);
 334                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 335                         break;
 336                 case Opt_type_ufs2:
 337                         ufs_clear_opt(*mount_options, UFSTYPE);
 338                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 339                         break;
 340                 case Opt_type_hp:
 341                         ufs_clear_opt (*mount_options, UFSTYPE);
 342                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 343                         break;
 344                 case Opt_type_nextstepcd:
 345                         ufs_clear_opt (*mount_options, UFSTYPE);
 346                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 347                         break;
 348                 case Opt_type_nextstep:
 349                         ufs_clear_opt (*mount_options, UFSTYPE);
 350                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 351                         break;
 352                 case Opt_type_openstep:
 353                         ufs_clear_opt (*mount_options, UFSTYPE);
 354                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 355                         break;
 356                 case Opt_onerror_panic:
 357                         ufs_clear_opt (*mount_options, ONERROR);
 358                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 359                         break;
 360                 case Opt_onerror_lock:
 361                         ufs_clear_opt (*mount_options, ONERROR);
 362                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 363                         break;
 364                 case Opt_onerror_umount:
 365                         ufs_clear_opt (*mount_options, ONERROR);
 366                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 367                         break;
 368                 case Opt_onerror_repair:
 369                         printk("UFS-fs: Unable to do repair on error, "
 370                                 "will lock lock instead\n");
 371                         ufs_clear_opt (*mount_options, ONERROR);
 372                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 373                         break;
 374                 default:
 375                         printk("UFS-fs: Invalid option: \"%s\" "
 376                                         "or missing value\n", p);
 377                         return 0;
 378                 }
 379         }
 380         return 1;
 381 }
 382
 383 /*
 384  * Diffrent types of UFS hold fs_cstotal in different
 385  * places, and use diffrent data structure for it.
 386  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 387  */
 388 static void ufs_setup_cstotal(struct super_block *sb)
 389 {
 390         struct ufs_sb_info *sbi = UFS_SB(sb);
 391         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 392         struct ufs_super_block_first *usb1;
 393         struct ufs_super_block_second *usb2;
 394         struct ufs_super_block_third *usb3;
 395         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 396
 397         UFSD("ENTER, mtype=%u\n", mtype);
 398         usb1 = ubh_get_usb_first(uspi);
 399         usb2 = ubh_get_usb_second(uspi);
 400         usb3 = ubh_get_usb_third(uspi);
 401
 402         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 403              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 404             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 405                 /*we have statistic in different place, then usual*/
 406                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 407                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 408                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 409                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 410         } else {
 411                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 412                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 413                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 414                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 415         }
 416         UFSD("EXIT\n");
 417 }
 418
 419 /*
 420  * Read on-disk structures associated with cylinder groups
 421  */
 422 static int ufs_read_cylinder_structures(struct super_block *sb)
 423 {
 424         struct ufs_sb_info *sbi = UFS_SB(sb);
 425         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 426         unsigned flags = sbi->s_flags;
 427         struct ufs_buffer_head * ubh;
 428         unsigned char * base, * space;
 429         unsigned size, blks, i;
 430         struct ufs_super_block_third *usb3;
 431
 432         UFSD("ENTER\n");
 433
 434         usb3 = ubh_get_usb_third(uspi);
 435         /*
 436          * Read cs structures from (usually) first data block
 437          * on the device.
 438          */
 439         size = uspi->s_cssize;
 440         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 441         base = space = kmalloc(size, GFP_KERNEL);
 442         if (!base)
 443                 goto failed;
 444         sbi->s_csp = (struct ufs_csum *)space;
 445         for (i = 0; i < blks; i += uspi->s_fpb) {
 446                 size = uspi->s_bsize;
 447                 if (i + uspi->s_fpb > blks)
 448                         size = (blks - i) * uspi->s_fsize;
 449
 450                 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 451                         ubh = ubh_bread(sb,
 452                                 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size);
 453                 else
 454                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 455
 456                 if (!ubh)
 457                         goto failed;
 458
 459                 ubh_ubhcpymem (space, ubh, size);
 460
 461                 space += size;
 462                 ubh_brelse (ubh);
 463                 ubh = NULL;
 464         }
 465
 466         /*
 467          * Read cylinder group (we read only first fragment from block
 468          * at this time) and prepare internal data structures for cg caching.
 469          */
 470         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 471                 goto failed;
 472         for (i = 0; i < uspi->s_ncg; i++)
 473                 sbi->s_ucg[i] = NULL;
 474         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 475                 sbi->s_ucpi[i] = NULL;
 476                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 477         }
 478         for (i = 0; i < uspi->s_ncg; i++) {
 479                 UFSD("read cg %u\n", i);
 480                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 481                         goto failed;
 482                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 483                         goto failed;
 484
 485                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 486         }
 487         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 488                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 489                         goto failed;
 490                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 491         }
 492         sbi->s_cg_loaded = 0;
 493         UFSD("EXIT\n");
 494         return 1;
 495
 496 failed:
 497         kfree (base);
 498         if (sbi->s_ucg) {
 499                 for (i = 0; i < uspi->s_ncg; i++)
 500                         if (sbi->s_ucg[i])
 501                                 brelse (sbi->s_ucg[i]);
 502                 kfree (sbi->s_ucg);
 503                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 504                         kfree (sbi->s_ucpi[i]);
 505         }
 506         UFSD("EXIT (FAILED)\n");
 507         return 0;
 508 }
 509
 510 /*
 511  * Sync our internal copy of fs_cstotal with disk
 512  */
 513 static void ufs_put_cstotal(struct super_block *sb)
 514 {
 515         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 516         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 517         struct ufs_super_block_first *usb1;
 518         struct ufs_super_block_second *usb2;
 519         struct ufs_super_block_third *usb3;
 520
 521         UFSD("ENTER\n");
 522         usb1 = ubh_get_usb_first(uspi);
 523         usb2 = ubh_get_usb_second(uspi);
 524         usb3 = ubh_get_usb_third(uspi);
 525
 526         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 527              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 528             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 529                 /*we have statistic in different place, then usual*/
 530                 usb2->fs_un.fs_u2.cs_ndir =
 531                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 532                 usb2->fs_un.fs_u2.cs_nbfree =
 533                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 534                 usb3->fs_un1.fs_u2.cs_nifree =
 535                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 536                 usb3->fs_un1.fs_u2.cs_nffree =
 537                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 538         } else {
 539                 usb1->fs_cstotal.cs_ndir =
 540                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 541                 usb1->fs_cstotal.cs_nbfree =
 542                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 543                 usb1->fs_cstotal.cs_nifree =
 544                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 545                 usb1->fs_cstotal.cs_nffree =
 546                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 547         }
 548         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 549         UFSD("EXIT\n");
 550 }
 551
 552 /**
 553  * ufs_put_super_internal() - put on-disk intrenal structures
 554  * @sb: pointer to super_block structure
 555  * Put on-disk structures associated with cylinder groups
 556  * and write them back to disk, also update cs_total on disk
 557  */
 558 static void ufs_put_super_internal(struct super_block *sb)
 559 {
 560         struct ufs_sb_info *sbi = UFS_SB(sb);
 561         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 562         struct ufs_buffer_head * ubh;
 563         unsigned char * base, * space;
 564         unsigned blks, size, i;
 565
 566
 567         UFSD("ENTER\n");
 568         ufs_put_cstotal(sb);
 569         size = uspi->s_cssize;
 570         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 571         base = space = (char*) sbi->s_csp;
 572         for (i = 0; i < blks; i += uspi->s_fpb) {
 573                 size = uspi->s_bsize;
 574                 if (i + uspi->s_fpb > blks)
 575                         size = (blks - i) * uspi->s_fsize;
 576                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 577                 ubh_memcpyubh (ubh, space, size);
 578                 space += size;
 579                 ubh_mark_buffer_uptodate (ubh, 1);
 580                 ubh_mark_buffer_dirty (ubh);
 581                 ubh_brelse (ubh);
 582         }
 583         for (i = 0; i < sbi->s_cg_loaded; i++) {
 584                 ufs_put_cylinder (sb, i);
 585                 kfree (sbi->s_ucpi[i]);
 586         }
 587         for (; i < UFS_MAX_GROUP_LOADED; i++)
 588                 kfree (sbi->s_ucpi[i]);
 589         for (i = 0; i < uspi->s_ncg; i++)
 590                 brelse (sbi->s_ucg[i]);
 591         kfree (sbi->s_ucg);
 592         kfree (base);
 593         UFSD("EXIT\n");
 594 }
 595
 596 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 597 {
 598         struct ufs_sb_info * sbi;
 599         struct ufs_sb_private_info * uspi;
 600         struct ufs_super_block_first * usb1;
 601         struct ufs_super_block_second * usb2;
 602         struct ufs_super_block_third * usb3;
 603         struct ufs_buffer_head * ubh;
 604         struct inode *inode;
 605         unsigned block_size, super_block_size;
 606         unsigned flags;
 607         unsigned super_block_offset;
 608
 609         uspi = NULL;
 610         ubh = NULL;
 611         flags = 0;
 612
 613         UFSD("ENTER\n");
 614
 615         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 616         if (!sbi)
 617                 goto failed_nomem;
 618         sb->s_fs_info = sbi;
 619         memset(sbi, 0, sizeof(struct ufs_sb_info));
 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
 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                 if (!(sb->s_flags & MS_RDONLY)) {
 680                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
 681                         sb->s_flags |= MS_RDONLY;
 682                 }
 683                 break;
 684
 685         case UFS_MOUNT_UFSTYPE_SUN:
 686                 UFSD("ufstype=sun\n");
 687                 uspi->s_fsize = block_size = 1024;
 688                 uspi->s_fmask = ~(1024 - 1);
 689                 uspi->s_fshift = 10;
 690                 uspi->s_sbsize = super_block_size = 2048;
 691                 uspi->s_sbbase = 0;
 692                 uspi->s_maxsymlinklen = 56;
 693                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 694                 break;
 695
 696         case UFS_MOUNT_UFSTYPE_SUNx86:
 697                 UFSD("ufstype=sunx86\n");
 698                 uspi->s_fsize = block_size = 1024;
 699                 uspi->s_fmask = ~(1024 - 1);
 700                 uspi->s_fshift = 10;
 701                 uspi->s_sbsize = super_block_size = 2048;
 702                 uspi->s_sbbase = 0;
 703                 uspi->s_maxsymlinklen = 56;
 704                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 705                 break;
 706
 707         case UFS_MOUNT_UFSTYPE_OLD:
 708                 UFSD("ufstype=old\n");
 709                 uspi->s_fsize = block_size = 1024;
 710                 uspi->s_fmask = ~(1024 - 1);
 711                 uspi->s_fshift = 10;
 712                 uspi->s_sbsize = super_block_size = 2048;
 713                 uspi->s_sbbase = 0;
 714                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 715                 if (!(sb->s_flags & MS_RDONLY)) {
 716                         if (!silent)
 717                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 718                         sb->s_flags |= MS_RDONLY;
 719                 }
 720                 break;
 721
 722         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 723                 UFSD("ufstype=nextstep\n");
 724                 uspi->s_fsize = block_size = 1024;
 725                 uspi->s_fmask = ~(1024 - 1);
 726                 uspi->s_fshift = 10;
 727                 uspi->s_sbsize = super_block_size = 2048;
 728                 uspi->s_sbbase = 0;
 729                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 730                 if (!(sb->s_flags & MS_RDONLY)) {
 731                         if (!silent)
 732                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 733                         sb->s_flags |= MS_RDONLY;
 734                 }
 735                 break;
 736
 737         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 738                 UFSD("ufstype=nextstep-cd\n");
 739                 uspi->s_fsize = block_size = 2048;
 740                 uspi->s_fmask = ~(2048 - 1);
 741                 uspi->s_fshift = 11;
 742                 uspi->s_sbsize = super_block_size = 2048;
 743                 uspi->s_sbbase = 0;
 744                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 745                 if (!(sb->s_flags & MS_RDONLY)) {
 746                         if (!silent)
 747                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 748                         sb->s_flags |= MS_RDONLY;
 749                 }
 750                 break;
 751
 752         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 753                 UFSD("ufstype=openstep\n");
 754                 uspi->s_fsize = block_size = 1024;
 755                 uspi->s_fmask = ~(1024 - 1);
 756                 uspi->s_fshift = 10;
 757                 uspi->s_sbsize = super_block_size = 2048;
 758                 uspi->s_sbbase = 0;
 759                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 760                 if (!(sb->s_flags & MS_RDONLY)) {
 761                         if (!silent)
 762                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 763                         sb->s_flags |= MS_RDONLY;
 764                 }
 765                 break;
 766
 767         case UFS_MOUNT_UFSTYPE_HP:
 768                 UFSD("ufstype=hp\n");
 769                 uspi->s_fsize = block_size = 1024;
 770                 uspi->s_fmask = ~(1024 - 1);
 771                 uspi->s_fshift = 10;
 772                 uspi->s_sbsize = super_block_size = 2048;
 773                 uspi->s_sbbase = 0;
 774                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 775                 if (!(sb->s_flags & MS_RDONLY)) {
 776                         if (!silent)
 777                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 778                         sb->s_flags |= MS_RDONLY;
 779                 }
 780                 break;
 781         default:
 782                 if (!silent)
 783                         printk("unknown ufstype\n");
 784                 goto failed;
 785         }
 786
 787 again:
 788         if (!sb_set_blocksize(sb, block_size)) {
 789                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 790                 goto failed;
 791         }
 792
 793         /*
 794          * read ufs super block from device
 795          */
 796
 797         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 798
 799         if (!ubh)
 800             goto failed;
 801
 802
 803         usb1 = ubh_get_usb_first(uspi);
 804         usb2 = ubh_get_usb_second(uspi);
 805         usb3 = ubh_get_usb_third(uspi);
 806
 807         /*
 808          * Check ufs magic number
 809          */
 810         sbi->s_bytesex = BYTESEX_LE;
 811         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 812                 case UFS_MAGIC:
 813                 case UFS2_MAGIC:
 814                 case UFS_MAGIC_LFN:
 815                 case UFS_MAGIC_FEA:
 816                 case UFS_MAGIC_4GB:
 817                         goto magic_found;
 818         }
 819         sbi->s_bytesex = BYTESEX_BE;
 820         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 821                 case UFS_MAGIC:
 822                 case UFS2_MAGIC:
 823                 case UFS_MAGIC_LFN:
 824                 case UFS_MAGIC_FEA:
 825                 case UFS_MAGIC_4GB:
 826                         goto magic_found;
 827         }
 828
 829         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 830           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 831           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 832           && uspi->s_sbbase < 256) {
 833                 ubh_brelse_uspi(uspi);
 834                 ubh = NULL;
 835                 uspi->s_sbbase += 8;
 836                 goto again;
 837         }
 838         if (!silent)
 839                 printk("ufs_read_super: bad magic number\n");
 840         goto failed;
 841
 842 magic_found:
 843         /*
 844          * Check block and fragment sizes
 845          */
 846         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 847         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 848         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 849         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 850         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 851
 852         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
 853                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 854                         uspi->s_fsize);
 855                         goto failed;
 856         }
 857         if (uspi->s_fsize < 512) {
 858                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 859                         uspi->s_fsize);
 860                 goto failed;
 861         }
 862         if (uspi->s_fsize > 4096) {
 863                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 864                         uspi->s_fsize);
 865                 goto failed;
 866         }
 867         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
 868                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 869                         uspi->s_bsize);
 870                 goto failed;
 871         }
 872         if (uspi->s_bsize < 4096) {
 873                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 874                         uspi->s_bsize);
 875                 goto failed;
 876         }
 877         if (uspi->s_bsize / uspi->s_fsize > 8) {
 878                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 879                         uspi->s_bsize / uspi->s_fsize);
 880                 goto failed;
 881         }
 882         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 883                 ubh_brelse_uspi(uspi);
 884                 ubh = NULL;
 885                 block_size = uspi->s_fsize;
 886                 super_block_size = uspi->s_sbsize;
 887                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 888                 goto again;
 889         }
 890
 891
 892         ufs_print_super_stuff(sb, flags, usb1, usb2, usb3);
 893
 894         /*
 895          * Check, if file system was correctly unmounted.
 896          * If not, make it read only.
 897          */
 898         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 899           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 900           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 901           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 902           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 903                 switch(usb1->fs_clean) {
 904                 case UFS_FSCLEAN:
 905                         UFSD("fs is clean\n");
 906                         break;
 907                 case UFS_FSSTABLE:
 908                         UFSD("fs is stable\n");
 909                         break;
 910                 case UFS_FSOSF1:
 911                         UFSD("fs is DEC OSF/1\n");
 912                         break;
 913                 case UFS_FSACTIVE:
 914                         printk("ufs_read_super: fs is active\n");
 915                         sb->s_flags |= MS_RDONLY;
 916                         break;
 917                 case UFS_FSBAD:
 918                         printk("ufs_read_super: fs is bad\n");
 919                         sb->s_flags |= MS_RDONLY;
 920                         break;
 921                 default:
 922                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 923                         sb->s_flags |= MS_RDONLY;
 924                         break;
 925                 }
 926         } else {
 927                 printk("ufs_read_super: fs needs fsck\n");
 928                 sb->s_flags |= MS_RDONLY;
 929         }
 930
 931         /*
 932          * Read ufs_super_block into internal data structures
 933          */
 934         sb->s_op = &ufs_super_ops;
 935         sb->dq_op = NULL; /***/
 936         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 937
 938         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 939         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 940         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 941         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 942         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 943         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 944
 945         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 946                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 947                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 948         } else {
 949                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 950                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 951         }
 952
 953         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 954         /* s_bsize already set */
 955         /* s_fsize already set */
 956         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 957         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 958         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 959         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 960         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 961         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 962         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
 963                 uspi->s_fshift);
 964         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 965         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 966         /* s_sbsize already set */
 967         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 968         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 969         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 970         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 971         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 972         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 973         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 974         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 975         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 976         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 977         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 978         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 979         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 980         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 981         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 982         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 983         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
 984         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
 985         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 986         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 987         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 988         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 989         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
 990         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
 991
 992         /*
 993          * Compute another frequently used values
 994          */
 995         uspi->s_fpbmask = uspi->s_fpb - 1;
 996         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 997                 uspi->s_apbshift = uspi->s_bshift - 3;
 998         else
 999                 uspi->s_apbshift = uspi->s_bshift - 2;
1000
1001         uspi->s_2apbshift = uspi->s_apbshift * 2;
1002         uspi->s_3apbshift = uspi->s_apbshift * 3;
1003         uspi->s_apb = 1 << uspi->s_apbshift;
1004         uspi->s_2apb = 1 << uspi->s_2apbshift;
1005         uspi->s_3apb = 1 << uspi->s_3apbshift;
1006         uspi->s_apbmask = uspi->s_apb - 1;
1007         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1008         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1009         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1010         uspi->s_bpf = uspi->s_fsize << 3;
1011         uspi->s_bpfshift = uspi->s_fshift + 3;
1012         uspi->s_bpfmask = uspi->s_bpf - 1;
1013         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1014             UFS_MOUNT_UFSTYPE_44BSD)
1015                 uspi->s_maxsymlinklen =
1016                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1017
1018         sbi->s_flags = flags;
1019
1020         inode = iget(sb, UFS_ROOTINO);
1021         if (!inode || is_bad_inode(inode))
1022                 goto failed;
1023         sb->s_root = d_alloc_root(inode);
1024         if (!sb->s_root)
1025                 goto dalloc_failed;
1026
1027         ufs_setup_cstotal(sb);
1028         /*
1029          * Read cylinder group structures
1030          */
1031         if (!(sb->s_flags & MS_RDONLY))
1032                 if (!ufs_read_cylinder_structures(sb))
1033                         goto failed;
1034
1035         UFSD("EXIT\n");
1036         return 0;
1037
1038 dalloc_failed:
1039         iput(inode);
1040 failed:
1041         if (ubh)
1042                 ubh_brelse_uspi (uspi);
1043         kfree (uspi);
1044         kfree(sbi);
1045         sb->s_fs_info = NULL;
1046         UFSD("EXIT (FAILED)\n");
1047         return -EINVAL;
1048
1049 failed_nomem:
1050         UFSD("EXIT (NOMEM)\n");
1051         return -ENOMEM;
1052 }
1053
1054 static void ufs_write_super(struct super_block *sb)
1055 {
1056         struct ufs_sb_private_info * uspi;
1057         struct ufs_super_block_first * usb1;
1058         struct ufs_super_block_third * usb3;
1059         unsigned flags;
1060
1061         lock_kernel();
1062
1063         UFSD("ENTER\n");
1064         flags = UFS_SB(sb)->s_flags;
1065         uspi = UFS_SB(sb)->s_uspi;
1066         usb1 = ubh_get_usb_first(uspi);
1067         usb3 = ubh_get_usb_third(uspi);
1068
1069         if (!(sb->s_flags & MS_RDONLY)) {
1070                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1071                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1072                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1073                         ufs_set_fs_state(sb, usb1, usb3,
1074                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1075                 ufs_put_cstotal(sb);
1076         }
1077         sb->s_dirt = 0;
1078         UFSD("EXIT\n");
1079         unlock_kernel();
1080 }
1081
1082 static void ufs_put_super(struct super_block *sb)
1083 {
1084         struct ufs_sb_info * sbi = UFS_SB(sb);
1085
1086         UFSD("ENTER\n");
1087
1088         if (!(sb->s_flags & MS_RDONLY))
1089                 ufs_put_super_internal(sb);
1090
1091         ubh_brelse_uspi (sbi->s_uspi);
1092         kfree (sbi->s_uspi);
1093         kfree (sbi);
1094         sb->s_fs_info = NULL;
1095         UFSD("EXIT\n");
1096         return;
1097 }
1098
1099
1100 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1101 {
1102         struct ufs_sb_private_info * uspi;
1103         struct ufs_super_block_first * usb1;
1104         struct ufs_super_block_third * usb3;
1105         unsigned new_mount_opt, ufstype;
1106         unsigned flags;
1107
1108         uspi = UFS_SB(sb)->s_uspi;
1109         flags = UFS_SB(sb)->s_flags;
1110         usb1 = ubh_get_usb_first(uspi);
1111         usb3 = ubh_get_usb_third(uspi);
1112
1113         /*
1114          * Allow the "check" option to be passed as a remount option.
1115          * It is not possible to change ufstype option during remount
1116          */
1117         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1118         new_mount_opt = 0;
1119         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1120         if (!ufs_parse_options (data, &new_mount_opt))
1121                 return -EINVAL;
1122         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1123                 new_mount_opt |= ufstype;
1124         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1125                 printk("ufstype can't be changed during remount\n");
1126                 return -EINVAL;
1127         }
1128
1129         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1130                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1131                 return 0;
1132         }
1133
1134         /*
1135          * fs was mouted as rw, remounting ro
1136          */
1137         if (*mount_flags & MS_RDONLY) {
1138                 ufs_put_super_internal(sb);
1139                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1140                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1141                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1142                         ufs_set_fs_state(sb, usb1, usb3,
1143                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1144                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1145                 sb->s_dirt = 0;
1146                 sb->s_flags |= MS_RDONLY;
1147         } else {
1148         /*
1149          * fs was mounted as ro, remounting rw
1150          */
1151 #ifndef CONFIG_UFS_FS_WRITE
1152                 printk("ufs was compiled with read-only support, "
1153                 "can't be mounted as read-write\n");
1154                 return -EINVAL;
1155 #else
1156                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1157                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1158                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
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 kmem_cache_t * 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, SLAB_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, kmem_cache_t * 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         if (kmem_cache_destroy(ufs_inode_cachep))
1250                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1251 }
1252
1253 #ifdef CONFIG_QUOTA
1254 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1255 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1256 #endif
1257
1258 static struct super_operations ufs_super_ops = {
1259         .alloc_inode    = ufs_alloc_inode,
1260         .destroy_inode  = ufs_destroy_inode,
1261         .read_inode     = ufs_read_inode,
1262         .write_inode    = ufs_write_inode,
1263         .delete_inode   = ufs_delete_inode,
1264         .put_super      = ufs_put_super,
1265         .write_super    = ufs_write_super,
1266         .statfs         = ufs_statfs,
1267         .remount_fs     = ufs_remount,
1268 #ifdef CONFIG_QUOTA
1269         .quota_read     = ufs_quota_read,
1270         .quota_write    = ufs_quota_write,
1271 #endif
1272 };
1273
1274 #ifdef CONFIG_QUOTA
1275
1276 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1277  * acquiring the locks... As quota files are never truncated and quota code
1278  * itself serializes the operations (and noone else should touch the files)
1279  * we don't have to be afraid of races */
1280 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1281                                size_t len, loff_t off)
1282 {
1283         struct inode *inode = sb_dqopt(sb)->files[type];
1284         sector_t blk = off >> sb->s_blocksize_bits;
1285         int err = 0;
1286         int offset = off & (sb->s_blocksize - 1);
1287         int tocopy;
1288         size_t toread;
1289         struct buffer_head *bh;
1290         loff_t i_size = i_size_read(inode);
1291
1292         if (off > i_size)
1293                 return 0;
1294         if (off+len > i_size)
1295                 len = i_size-off;
1296         toread = len;
1297         while (toread > 0) {
1298                 tocopy = sb->s_blocksize - offset < toread ?
1299                                 sb->s_blocksize - offset : toread;
1300
1301                 bh = ufs_bread(inode, blk, 0, &err);
1302                 if (err)
1303                         return err;
1304                 if (!bh)        /* A hole? */
1305                         memset(data, 0, tocopy);
1306                 else {
1307                         memcpy(data, bh->b_data+offset, tocopy);
1308                         brelse(bh);
1309                 }
1310                 offset = 0;
1311                 toread -= tocopy;
1312                 data += tocopy;
1313                 blk++;
1314         }
1315         return len;
1316 }
1317
1318 /* Write to quotafile */
1319 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1320                                 const char *data, size_t len, loff_t off)
1321 {
1322         struct inode *inode = sb_dqopt(sb)->files[type];
1323         sector_t blk = off >> sb->s_blocksize_bits;
1324         int err = 0;
1325         int offset = off & (sb->s_blocksize - 1);
1326         int tocopy;
1327         size_t towrite = len;
1328         struct buffer_head *bh;
1329
1330         mutex_lock(&inode->i_mutex);
1331         while (towrite > 0) {
1332                 tocopy = sb->s_blocksize - offset < towrite ?
1333                                 sb->s_blocksize - offset : towrite;
1334
1335                 bh = ufs_bread(inode, blk, 1, &err);
1336                 if (!bh)
1337                         goto out;
1338                 lock_buffer(bh);
1339                 memcpy(bh->b_data+offset, data, tocopy);
1340                 flush_dcache_page(bh->b_page);
1341                 set_buffer_uptodate(bh);
1342                 mark_buffer_dirty(bh);
1343                 unlock_buffer(bh);
1344                 brelse(bh);
1345                 offset = 0;
1346                 towrite -= tocopy;
1347                 data += tocopy;
1348                 blk++;
1349         }
1350 out:
1351         if (len == towrite) {
1352                 mutex_unlock(&inode->i_mutex);
1353                 return err;
1354         }
1355         if (inode->i_size < off+len-towrite)
1356                 i_size_write(inode, off+len-towrite);
1357         inode->i_version++;
1358         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1359         mark_inode_dirty(inode);
1360         mutex_unlock(&inode->i_mutex);
1361         return len - towrite;
1362 }
1363
1364 #endif
1365
1366 static int ufs_get_sb(struct file_system_type *fs_type,
1367         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1368 {
1369         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1370 }
1371
1372 static struct file_system_type ufs_fs_type = {
1373         .owner          = THIS_MODULE,
1374         .name           = "ufs",
1375         .get_sb         = ufs_get_sb,
1376         .kill_sb        = kill_block_super,
1377         .fs_flags       = FS_REQUIRES_DEV,
1378 };
1379
1380 static int __init init_ufs_fs(void)
1381 {
1382         int err = init_inodecache();
1383         if (err)
1384                 goto out1;
1385         err = register_filesystem(&ufs_fs_type);
1386         if (err)
1387                 goto out;
1388         return 0;
1389 out:
1390         destroy_inodecache();
1391 out1:
1392         return err;
1393 }
1394
1395 static void __exit exit_ufs_fs(void)
1396 {
1397         unregister_filesystem(&ufs_fs_type);
1398         destroy_inodecache();
1399 }
1400
1401 module_init(init_ufs_fs)
1402 module_exit(exit_ufs_fs)
1403 MODULE_LICENSE("GPL");