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  */
  62
  63
  64 #include <linux/config.h>
  65 #include <linux/module.h>
  66
  67 #include <stdarg.h>
  68
  69 #include <asm/bitops.h>
  70 #include <asm/uaccess.h>
  71 #include <asm/system.h>
  72
  73 #include <linux/errno.h>
  74 #include <linux/fs.h>
  75 #include <linux/ufs_fs.h>
  76 #include <linux/slab.h>
  77 #include <linux/sched.h>
  78 #include <linux/stat.h>
  79 #include <linux/string.h>
  80 #include <linux/locks.h>
  81 #include <linux/blkdev.h>
  82 #include <linux/init.h>
  83
  84 #include "swab.h"
  85 #include "util.h"
  86
  87 #undef UFS_SUPER_DEBUG
  88 #undef UFS_SUPER_DEBUG_MORE
  89
  90 #ifdef UFS_SUPER_DEBUG
  91 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
  92 #else
  93 #define UFSD(x)
  94 #endif
  95
  96 #ifdef UFS_SUPER_DEBUG_MORE
  97 /*
  98  * Print contents of ufs_super_block, useful for debugging
  99  */
 100 void ufs_print_super_stuff(struct super_block *sb,
 101         struct ufs_super_block_first * usb1,
 102         struct ufs_super_block_second * usb2,
 103         struct ufs_super_block_third * usb3)
 104 {
 105         printk("ufs_print_super_stuff\n");
 106         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
 107         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
 108         printk("  sblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 109         printk("  cblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 110         printk("  iblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 111         printk("  dblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 112         printk("  cgoffset:      %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
 113         printk("  ~cgmask:       0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
 114         printk("  size:          %u\n", fs32_to_cpu(sb, usb1->fs_size));
 115         printk("  dsize:         %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 116         printk("  ncg:           %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 117         printk("  bsize:         %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 118         printk("  fsize:         %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 119         printk("  frag:          %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 120         printk("  fragshift:     %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
 121         printk("  ~fmask:        %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 122         printk("  fshift:        %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 123         printk("  sbsize:        %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 124         printk("  spc:           %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 125         printk("  cpg:           %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 126         printk("  ipg:           %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 127         printk("  fpg:           %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 128         printk("  csaddr:        %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 129         printk("  cssize:        %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 130         printk("  cgsize:        %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 131         printk("  fstodb:        %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
 132         printk("  contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
 133         printk("  postblformat:  %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
 134         printk("  nrpos:         %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 135         printk("  ndir           %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 136         printk("  nifree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 137         printk("  nbfree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 138         printk("  nffree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 139         printk("\n");
 140 }
 141
 142
 143 /*
 144  * Print contents of ufs_cylinder_group, useful for debugging
 145  */
 146 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
 147 {
 148         printk("\nufs_print_cylinder_stuff\n");
 149         printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
 150         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 151         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 152         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 153         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 154         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 155         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 156         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 157         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 158         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 159         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 160         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 161         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 162         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 163         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 164             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 165             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 166             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 167             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 168         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 169         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 170         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 171         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 172         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 173         printk("  clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 174         printk("  clusteroff    %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 175         printk("  nclusterblks  %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 176         printk("\n");
 177 }
 178 #endif /* UFS_SUPER_DEBUG_MORE */
 179
 180 static struct super_operations ufs_super_ops;
 181
 182 static char error_buf[1024];
 183
 184 void ufs_error (struct super_block * sb, const char * function,
 185         const char * fmt, ...)
 186 {
 187         struct ufs_sb_private_info * uspi;
 188         struct ufs_super_block_first * usb1;
 189         va_list args;
 190
 191         uspi = sb->u.ufs_sb.s_uspi;
 192         usb1 = ubh_get_usb_first(USPI_UBH);
 193
 194         if (!(sb->s_flags & MS_RDONLY)) {
 195                 usb1->fs_clean = UFS_FSBAD;
 196                 ubh_mark_buffer_dirty(USPI_UBH);
 197                 sb->s_dirt = 1;
 198                 sb->s_flags |= MS_RDONLY;
 199         }
 200         va_start (args, fmt);
 201         vsprintf (error_buf, fmt, args);
 202         va_end (args);
 203         switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_ONERROR) {
 204         case UFS_MOUNT_ONERROR_PANIC:
 205                 panic ("UFS-fs panic (device %s): %s: %s\n",
 206                         kdevname(sb->s_dev), function, error_buf);
 207
 208         case UFS_MOUNT_ONERROR_LOCK:
 209         case UFS_MOUNT_ONERROR_UMOUNT:
 210         case UFS_MOUNT_ONERROR_REPAIR:
 211                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 212                         kdevname(sb->s_dev), function, error_buf);
 213         }
 214 }
 215
 216 void ufs_panic (struct super_block * sb, const char * function,
 217         const char * fmt, ...)
 218 {
 219         struct ufs_sb_private_info * uspi;
 220         struct ufs_super_block_first * usb1;
 221         va_list args;
 222
 223         uspi = sb->u.ufs_sb.s_uspi;
 224         usb1 = ubh_get_usb_first(USPI_UBH);
 225
 226         if (!(sb->s_flags & MS_RDONLY)) {
 227                 usb1->fs_clean = UFS_FSBAD;
 228                 ubh_mark_buffer_dirty(USPI_UBH);
 229                 sb->s_dirt = 1;
 230         }
 231         va_start (args, fmt);
 232         vsprintf (error_buf, fmt, args);
 233         va_end (args);
 234         sb->s_flags |= MS_RDONLY;
 235         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 236                 kdevname(sb->s_dev), function, error_buf);
 237 }
 238
 239 void ufs_warning (struct super_block * sb, const char * function,
 240         const char * fmt, ...)
 241 {
 242         va_list args;
 243
 244         va_start (args, fmt);
 245         vsprintf (error_buf, fmt, args);
 246         va_end (args);
 247         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 248                 kdevname(sb->s_dev), function, error_buf);
 249 }
 250
 251 static int ufs_parse_options (char * options, unsigned * mount_options)
 252 {
 253         char * this_char;
 254         char * value;
 255
 256         UFSD(("ENTER\n"))
 257
 258         if (!options)
 259                 return 1;
 260
 261         for (this_char = strtok (options, ",");
 262              this_char != NULL;
 263              this_char = strtok (NULL, ",")) {
 264
 265                 if ((value = strchr (this_char, '=')) != NULL)
 266                         *value++ = 0;
 267                 if (!strcmp (this_char, "ufstype")) {
 268                         ufs_clear_opt (*mount_options, UFSTYPE);
 269                         if (!strcmp (value, "old"))
 270                                 ufs_set_opt (*mount_options, UFSTYPE_OLD);
 271                         else if (!strcmp (value, "sun"))
 272                                 ufs_set_opt (*mount_options, UFSTYPE_SUN);
 273                         else if (!strcmp (value, "44bsd"))
 274                                 ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 275                         else if (!strcmp (value, "nextstep"))
 276                                 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 277                         else if (!strcmp (value, "nextstep-cd"))
 278                                 ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 279                         else if (!strcmp (value, "openstep"))
 280                                 ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 281                         else if (!strcmp (value, "sunx86"))
 282                                 ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 283                         else if (!strcmp (value, "hp"))
 284                                 ufs_set_opt (*mount_options, UFSTYPE_HP);
 285                         else {
 286                                 printk ("UFS-fs: Invalid type option: %s\n", value);
 287                                 return 0;
 288                         }
 289                 }
 290                 else if (!strcmp (this_char, "onerror")) {
 291                         ufs_clear_opt (*mount_options, ONERROR);
 292                         if (!strcmp (value, "panic"))
 293                                 ufs_set_opt (*mount_options, ONERROR_PANIC);
 294                         else if (!strcmp (value, "lock"))
 295                                 ufs_set_opt (*mount_options, ONERROR_LOCK);
 296                         else if (!strcmp (value, "umount"))
 297                                 ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 298                         else if (!strcmp (value, "repair")) {
 299                                 printk("UFS-fs: Unable to do repair on error, "
 300                                         "will lock lock instead \n");
 301                                 ufs_set_opt (*mount_options, ONERROR_REPAIR);
 302                         }
 303                         else {
 304                                 printk ("UFS-fs: Invalid action onerror: %s\n", value);
 305                                 return 0;
 306                         }
 307                 }
 308                 else {
 309                         printk("UFS-fs: Invalid option: %s\n", this_char);
 310                         return 0;
 311                 }
 312         }
 313         return 1;
 314 }
 315
 316 /*
 317  * Read on-disk structures associated with cylinder groups
 318  */
 319 int ufs_read_cylinder_structures (struct super_block * sb) {
 320         struct ufs_sb_private_info * uspi;
 321         struct ufs_buffer_head * ubh;
 322         unsigned char * base, * space;
 323         unsigned size, blks, i;
 324
 325         UFSD(("ENTER\n"))
 326
 327         uspi = sb->u.ufs_sb.s_uspi;
 328
 329         /*
 330          * Read cs structures from (usually) first data block
 331          * on the device.
 332          */
 333         size = uspi->s_cssize;
 334         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 335         base = space = kmalloc(size, GFP_KERNEL);
 336         if (!base)
 337                 goto failed;
 338         for (i = 0; i < blks; i += uspi->s_fpb) {
 339                 size = uspi->s_bsize;
 340                 if (i + uspi->s_fpb > blks)
 341                         size = (blks - i) * uspi->s_fsize;
 342                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 343                 if (!ubh)
 344                         goto failed;
 345                 ubh_ubhcpymem (space, ubh, size);
 346                 sb->u.ufs_sb.s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space;
 347                 space += size;
 348                 ubh_brelse (ubh);
 349                 ubh = NULL;
 350         }
 351
 352         /*
 353          * Read cylinder group (we read only first fragment from block
 354          * at this time) and prepare internal data structures for cg caching.
 355          */
 356         if (!(sb->u.ufs_sb.s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 357                 goto failed;
 358         for (i = 0; i < uspi->s_ncg; i++)
 359                 sb->u.ufs_sb.s_ucg[i] = NULL;
 360         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 361                 sb->u.ufs_sb.s_ucpi[i] = NULL;
 362                 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
 363         }
 364         for (i = 0; i < uspi->s_ncg; i++) {
 365                 UFSD(("read cg %u\n", i))
 366                 if (!(sb->u.ufs_sb.s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 367                         goto failed;
 368                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data))
 369                         goto failed;
 370 #ifdef UFS_SUPER_DEBUG_MORE
 371                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data);
 372 #endif
 373         }
 374         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 375                 if (!(sb->u.ufs_sb.s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 376                         goto failed;
 377                 sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
 378         }
 379         sb->u.ufs_sb.s_cg_loaded = 0;
 380         UFSD(("EXIT\n"))
 381         return 1;
 382
 383 failed:
 384         if (base) kfree (base);
 385         if (sb->u.ufs_sb.s_ucg) {
 386                 for (i = 0; i < uspi->s_ncg; i++)
 387                         if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]);
 388                 kfree (sb->u.ufs_sb.s_ucg);
 389                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 390                         if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]);
 391         }
 392         UFSD(("EXIT (FAILED)\n"))
 393         return 0;
 394 }
 395
 396 /*
 397  * Put on-disk structures associated with cylinder groups and
 398  * write them back to disk
 399  */
 400 void ufs_put_cylinder_structures (struct super_block * sb) {
 401         struct ufs_sb_private_info * uspi;
 402         struct ufs_buffer_head * ubh;
 403         unsigned char * base, * space;
 404         unsigned blks, size, i;
 405
 406         UFSD(("ENTER\n"))
 407
 408         uspi = sb->u.ufs_sb.s_uspi;
 409
 410         size = uspi->s_cssize;
 411         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 412         base = space = (char*) sb->u.ufs_sb.s_csp[0];
 413         for (i = 0; i < blks; i += uspi->s_fpb) {
 414                 size = uspi->s_bsize;
 415                 if (i + uspi->s_fpb > blks)
 416                         size = (blks - i) * uspi->s_fsize;
 417                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 418                 ubh_memcpyubh (ubh, space, size);
 419                 space += size;
 420                 ubh_mark_buffer_uptodate (ubh, 1);
 421                 ubh_mark_buffer_dirty (ubh);
 422                 ubh_brelse (ubh);
 423         }
 424         for (i = 0; i < sb->u.ufs_sb.s_cg_loaded; i++) {
 425                 ufs_put_cylinder (sb, i);
 426                 kfree (sb->u.ufs_sb.s_ucpi[i]);
 427         }
 428         for (; i < UFS_MAX_GROUP_LOADED; i++)
 429                 kfree (sb->u.ufs_sb.s_ucpi[i]);
 430         for (i = 0; i < uspi->s_ncg; i++)
 431                 brelse (sb->u.ufs_sb.s_ucg[i]);
 432         kfree (sb->u.ufs_sb.s_ucg);
 433         kfree (base);
 434         UFSD(("EXIT\n"))
 435 }
 436
 437 struct super_block * ufs_read_super (struct super_block * sb, void * data,
 438         int silent)
 439 {
 440         struct ufs_sb_private_info * uspi;
 441         struct ufs_super_block_first * usb1;
 442         struct ufs_super_block_second * usb2;
 443         struct ufs_super_block_third * usb3;
 444         struct ufs_buffer_head * ubh;
 445         struct inode *inode;
 446         unsigned block_size, super_block_size;
 447         unsigned flags;
 448
 449         uspi = NULL;
 450         ubh = NULL;
 451         flags = 0;
 452
 453         UFSD(("ENTER\n"))
 454
 455         UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
 456
 457 #ifndef CONFIG_UFS_FS_WRITE
 458         if (!(sb->s_flags & MS_RDONLY)) {
 459                 printk("ufs was compiled with read-only support, "
 460                 "can't be mounted as read-write\n");
 461                 goto failed;
 462         }
 463 #endif
 464         /*
 465          * Set default mount options
 466          * Parse mount options
 467          */
 468         sb->u.ufs_sb.s_mount_opt = 0;
 469         ufs_set_opt (sb->u.ufs_sb.s_mount_opt, ONERROR_LOCK);
 470         if (!ufs_parse_options ((char *) data, &sb->u.ufs_sb.s_mount_opt)) {
 471                 printk("wrong mount options\n");
 472                 goto failed;
 473         }
 474         if (!(sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 475                 printk("You didn't specify the type of your ufs filesystem\n\n"
 476                 "mount -t ufs -o ufstype="
 477                 "sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
 478                 ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 479                 "default is ufstype=old\n");
 480                 ufs_set_opt (sb->u.ufs_sb.s_mount_opt, UFSTYPE_OLD);
 481         }
 482
 483         sb->u.ufs_sb.s_uspi = uspi =
 484                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 485         if (!uspi)
 486                 goto failed;
 487
 488         /* Keep 2Gig file limit. Some UFS variants need to override
 489            this but as I don't know which I'll let those in the know loosen
 490            the rules */
 491
 492         switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) {
 493         case UFS_MOUNT_UFSTYPE_44BSD:
 494                 UFSD(("ufstype=44bsd\n"))
 495                 uspi->s_fsize = block_size = 512;
 496                 uspi->s_fmask = ~(512 - 1);
 497                 uspi->s_fshift = 9;
 498                 uspi->s_sbsize = super_block_size = 1536;
 499                 uspi->s_sbbase = 0;
 500                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 501                 break;
 502
 503         case UFS_MOUNT_UFSTYPE_SUN:
 504                 UFSD(("ufstype=sun\n"))
 505                 uspi->s_fsize = block_size = 1024;
 506                 uspi->s_fmask = ~(1024 - 1);
 507                 uspi->s_fshift = 10;
 508                 uspi->s_sbsize = super_block_size = 2048;
 509                 uspi->s_sbbase = 0;
 510                 uspi->s_maxsymlinklen = 56;
 511                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 512                 break;
 513
 514         case UFS_MOUNT_UFSTYPE_SUNx86:
 515                 UFSD(("ufstype=sunx86\n"))
 516                 uspi->s_fsize = block_size = 1024;
 517                 uspi->s_fmask = ~(1024 - 1);
 518                 uspi->s_fshift = 10;
 519                 uspi->s_sbsize = super_block_size = 2048;
 520                 uspi->s_sbbase = 0;
 521                 uspi->s_maxsymlinklen = 56;
 522                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 523                 break;
 524
 525         case UFS_MOUNT_UFSTYPE_OLD:
 526                 UFSD(("ufstype=old\n"))
 527                 uspi->s_fsize = block_size = 1024;
 528                 uspi->s_fmask = ~(1024 - 1);
 529                 uspi->s_fshift = 10;
 530                 uspi->s_sbsize = super_block_size = 2048;
 531                 uspi->s_sbbase = 0;
 532                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 533                 if (!(sb->s_flags & MS_RDONLY)) {
 534                         printk(KERN_INFO "ufstype=old is supported read-only\n");
 535                         sb->s_flags |= MS_RDONLY;
 536                 }
 537                 break;
 538
 539         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 540                 UFSD(("ufstype=nextstep\n"))
 541                 uspi->s_fsize = block_size = 1024;
 542                 uspi->s_fmask = ~(1024 - 1);
 543                 uspi->s_fshift = 10;
 544                 uspi->s_sbsize = super_block_size = 2048;
 545                 uspi->s_sbbase = 0;
 546                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 547                 if (!(sb->s_flags & MS_RDONLY)) {
 548                         printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 549                         sb->s_flags |= MS_RDONLY;
 550                 }
 551                 break;
 552
 553         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 554                 UFSD(("ufstype=nextstep-cd\n"))
 555                 uspi->s_fsize = block_size = 2048;
 556                 uspi->s_fmask = ~(2048 - 1);
 557                 uspi->s_fshift = 11;
 558                 uspi->s_sbsize = super_block_size = 2048;
 559                 uspi->s_sbbase = 0;
 560                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 561                 if (!(sb->s_flags & MS_RDONLY)) {
 562                         printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 563                         sb->s_flags |= MS_RDONLY;
 564                 }
 565                 break;
 566
 567         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 568                 UFSD(("ufstype=openstep\n"))
 569                 uspi->s_fsize = block_size = 1024;
 570                 uspi->s_fmask = ~(1024 - 1);
 571                 uspi->s_fshift = 10;
 572                 uspi->s_sbsize = super_block_size = 2048;
 573                 uspi->s_sbbase = 0;
 574                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 575                 if (!(sb->s_flags & MS_RDONLY)) {
 576                         printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 577                         sb->s_flags |= MS_RDONLY;
 578                 }
 579                 break;
 580
 581         case UFS_MOUNT_UFSTYPE_HP:
 582                 UFSD(("ufstype=hp\n"))
 583                 uspi->s_fsize = block_size = 1024;
 584                 uspi->s_fmask = ~(1024 - 1);
 585                 uspi->s_fshift = 10;
 586                 uspi->s_sbsize = super_block_size = 2048;
 587                 uspi->s_sbbase = 0;
 588                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 589                 if (!(sb->s_flags & MS_RDONLY)) {
 590                         printk(KERN_INFO "ufstype=hp is supported read-only\n");
 591                         sb->s_flags |= MS_RDONLY;
 592                 }
 593                 break;
 594         default:
 595                 printk("unknown ufstype\n");
 596                 goto failed;
 597         }
 598
 599 again:
 600         if (set_blocksize (sb->s_dev, block_size)) {
 601                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 602                 goto failed;
 603         }
 604
 605         sb->s_blocksize = block_size;
 606
 607         /*
 608          * read ufs super block from device
 609          */
 610         ubh = ubh_bread_uspi (uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
 611         if (!ubh)
 612                 goto failed;
 613
 614         usb1 = ubh_get_usb_first(USPI_UBH);
 615         usb2 = ubh_get_usb_second(USPI_UBH);
 616         usb3 = ubh_get_usb_third(USPI_UBH);
 617
 618         /*
 619          * Check ufs magic number
 620          */
 621         switch (__constant_le32_to_cpu(usb3->fs_magic)) {
 622                 case UFS_MAGIC:
 623                 case UFS_MAGIC_LFN:
 624                 case UFS_MAGIC_FEA:
 625                 case UFS_MAGIC_4GB:
 626                         sb->u.ufs_sb.s_bytesex = BYTESEX_LE;
 627                         goto magic_found;
 628         }
 629         switch (__constant_be32_to_cpu(usb3->fs_magic)) {
 630                 case UFS_MAGIC:
 631                 case UFS_MAGIC_LFN:
 632                 case UFS_MAGIC_FEA:
 633                 case UFS_MAGIC_4GB:
 634                         sb->u.ufs_sb.s_bytesex = BYTESEX_BE;
 635                         goto magic_found;
 636         }
 637
 638         if ((((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 639           || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 640           || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 641           && uspi->s_sbbase < 256) {
 642                 ubh_brelse_uspi(uspi);
 643                 ubh = NULL;
 644                 uspi->s_sbbase += 8;
 645                 goto again;
 646         }
 647         printk("ufs_read_super: bad magic number\n");
 648         goto failed;
 649
 650 magic_found:
 651         /*
 652          * Check block and fragment sizes
 653          */
 654         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 655         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 656         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 657         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 658         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 659
 660         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
 661                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 662                         uspi->s_fsize);
 663                 goto failed;
 664         }
 665         if (uspi->s_fsize < 512) {
 666                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 667                         uspi->s_fsize);
 668                 goto failed;
 669         }
 670         if (uspi->s_fsize > 4096) {
 671                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 672                         uspi->s_fsize);
 673                 goto failed;
 674         }
 675         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
 676                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 677                         uspi->s_bsize);
 678                 goto failed;
 679         }
 680         if (uspi->s_bsize < 4096) {
 681                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 682                         uspi->s_bsize);
 683                 goto failed;
 684         }
 685         if (uspi->s_bsize / uspi->s_fsize > 8) {
 686                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 687                         uspi->s_bsize / uspi->s_fsize);
 688                 goto failed;
 689         }
 690         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 691                 ubh_brelse_uspi(uspi);
 692                 ubh = NULL;
 693                 block_size = uspi->s_fsize;
 694                 super_block_size = uspi->s_sbsize;
 695                 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
 696                 goto again;
 697         }
 698
 699 #ifdef UFS_SUPER_DEBUG_MORE
 700         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 701 #endif
 702
 703         /*
 704          * Check, if file system was correctly unmounted.
 705          * If not, make it read only.
 706          */
 707         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 708           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 709           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 710           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 711           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 712                 switch(usb1->fs_clean) {
 713                 case UFS_FSCLEAN:
 714                         UFSD(("fs is clean\n"))
 715                         break;
 716                 case UFS_FSSTABLE:
 717                         UFSD(("fs is stable\n"))
 718                         break;
 719                 case UFS_FSOSF1:
 720                         UFSD(("fs is DEC OSF/1\n"))
 721                         break;
 722                 case UFS_FSACTIVE:
 723                         printk("ufs_read_super: fs is active\n");
 724                         sb->s_flags |= MS_RDONLY;
 725                         break;
 726                 case UFS_FSBAD:
 727                         printk("ufs_read_super: fs is bad\n");
 728                         sb->s_flags |= MS_RDONLY;
 729                         break;
 730                 default:
 731                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 732                         sb->s_flags |= MS_RDONLY;
 733                         break;
 734                 }
 735         }
 736         else {
 737                 printk("ufs_read_super: fs needs fsck\n");
 738                 sb->s_flags |= MS_RDONLY;
 739         }
 740
 741         /*
 742          * Read ufs_super_block into internal data structures
 743          */
 744         sb->s_blocksize = fs32_to_cpu(sb, usb1->fs_fsize);
 745         sb->s_blocksize_bits = fs32_to_cpu(sb, usb1->fs_fshift);
 746         sb->s_op = &ufs_super_ops;
 747         sb->dq_op = NULL; /***/
 748         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 749
 750         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 751         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 752         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 753         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 754         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 755         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 756         uspi->s_size = fs32_to_cpu(sb, usb1->fs_size);
 757         uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize);
 758         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 759         /* s_bsize already set */
 760         /* s_fsize already set */
 761         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 762         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 763         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 764         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 765         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 766         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 767         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 768         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 769         /* s_sbsize already set */
 770         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 771         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 772         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 773         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 774         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 775         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 776         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 777         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 778         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 779         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 780         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 781         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 782         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 783         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 784         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 785         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 786         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
 787         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
 788         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 789         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 790         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 791         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 792         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
 793         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
 794
 795         /*
 796          * Compute another frequently used values
 797          */
 798         uspi->s_fpbmask = uspi->s_fpb - 1;
 799         uspi->s_apbshift = uspi->s_bshift - 2;
 800         uspi->s_2apbshift = uspi->s_apbshift * 2;
 801         uspi->s_3apbshift = uspi->s_apbshift * 3;
 802         uspi->s_apb = 1 << uspi->s_apbshift;
 803         uspi->s_2apb = 1 << uspi->s_2apbshift;
 804         uspi->s_3apb = 1 << uspi->s_3apbshift;
 805         uspi->s_apbmask = uspi->s_apb - 1;
 806         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
 807         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
 808         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
 809         uspi->s_bpf = uspi->s_fsize << 3;
 810         uspi->s_bpfshift = uspi->s_fshift + 3;
 811         uspi->s_bpfmask = uspi->s_bpf - 1;
 812         if ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) ==
 813             UFS_MOUNT_UFSTYPE_44BSD)
 814                 uspi->s_maxsymlinklen =
 815                     fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
 816
 817         sb->u.ufs_sb.s_flags = flags;
 818
 819         inode = iget(sb, UFS_ROOTINO);
 820         if (!inode || is_bad_inode(inode))
 821                 goto failed;
 822         sb->s_root = d_alloc_root(inode);
 823         if (!sb->s_root)
 824                 goto dalloc_failed;
 825
 826
 827         /*
 828          * Read cylinder group structures
 829          */
 830         if (!(sb->s_flags & MS_RDONLY))
 831                 if (!ufs_read_cylinder_structures(sb))
 832                         goto failed;
 833
 834         UFSD(("EXIT\n"))
 835         return(sb);
 836
 837 dalloc_failed:
 838         iput(inode);
 839 failed:
 840         if (ubh) ubh_brelse_uspi (uspi);
 841         if (uspi) kfree (uspi);
 842         UFSD(("EXIT (FAILED)\n"))
 843         return(NULL);
 844 }
 845
 846 void ufs_write_super (struct super_block * sb) {
 847         struct ufs_sb_private_info * uspi;
 848         struct ufs_super_block_first * usb1;
 849         struct ufs_super_block_third * usb3;
 850         unsigned flags;
 851
 852         UFSD(("ENTER\n"))
 853         flags = sb->u.ufs_sb.s_flags;
 854         uspi = sb->u.ufs_sb.s_uspi;
 855         usb1 = ubh_get_usb_first(USPI_UBH);
 856         usb3 = ubh_get_usb_third(USPI_UBH);
 857
 858         if (!(sb->s_flags & MS_RDONLY)) {
 859                 usb1->fs_time = cpu_to_fs32(sb, CURRENT_TIME);
 860                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
 861                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 862                         ufs_set_fs_state(sb, usb1, usb3,
 863                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 864                 ubh_mark_buffer_dirty (USPI_UBH);
 865         }
 866         sb->s_dirt = 0;
 867         UFSD(("EXIT\n"))
 868 }
 869
 870 void ufs_put_super (struct super_block * sb)
 871 {
 872         struct ufs_sb_private_info * uspi;
 873
 874         UFSD(("ENTER\n"))
 875
 876         uspi = sb->u.ufs_sb.s_uspi;
 877
 878         if (!(sb->s_flags & MS_RDONLY))
 879                 ufs_put_cylinder_structures (sb);
 880
 881         ubh_brelse_uspi (uspi);
 882         kfree (sb->u.ufs_sb.s_uspi);
 883         return;
 884 }
 885
 886
 887 int ufs_remount (struct super_block * sb, int * mount_flags, char * data)
 888 {
 889         struct ufs_sb_private_info * uspi;
 890         struct ufs_super_block_first * usb1;
 891         struct ufs_super_block_third * usb3;
 892         unsigned new_mount_opt, ufstype;
 893         unsigned flags;
 894
 895         uspi = sb->u.ufs_sb.s_uspi;
 896         flags = sb->u.ufs_sb.s_flags;
 897         usb1 = ubh_get_usb_first(USPI_UBH);
 898         usb3 = ubh_get_usb_third(USPI_UBH);
 899
 900         /*
 901          * Allow the "check" option to be passed as a remount option.
 902          * It is not possible to change ufstype option during remount
 903          */
 904         ufstype = sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE;
 905         new_mount_opt = 0;
 906         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
 907         if (!ufs_parse_options (data, &new_mount_opt))
 908                 return -EINVAL;
 909         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
 910                 new_mount_opt |= ufstype;
 911         }
 912         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
 913                 printk("ufstype can't be changed during remount\n");
 914                 return -EINVAL;
 915         }
 916
 917         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
 918                 sb->u.ufs_sb.s_mount_opt = new_mount_opt;
 919                 return 0;
 920         }
 921
 922         /*
 923          * fs was mouted as rw, remounting ro
 924          */
 925         if (*mount_flags & MS_RDONLY) {
 926                 ufs_put_cylinder_structures(sb);
 927                 usb1->fs_time = cpu_to_fs32(sb, CURRENT_TIME);
 928                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
 929                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
 930                         ufs_set_fs_state(sb, usb1, usb3,
 931                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
 932                 ubh_mark_buffer_dirty (USPI_UBH);
 933                 sb->s_dirt = 0;
 934                 sb->s_flags |= MS_RDONLY;
 935         }
 936         /*
 937          * fs was mounted as ro, remounting rw
 938          */
 939         else {
 940 #ifndef CONFIG_UFS_FS_WRITE
 941                 printk("ufs was compiled with read-only support, "
 942                 "can't be mounted as read-write\n");
 943                 return -EINVAL;
 944 #else
 945                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
 946                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
 947                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
 948                         printk("this ufstype is read-only supported\n");
 949                         return -EINVAL;
 950                 }
 951                 if (!ufs_read_cylinder_structures (sb)) {
 952                         printk("failed during remounting\n");
 953                         return -EPERM;
 954                 }
 955                 sb->s_flags &= ~MS_RDONLY;
 956 #endif
 957         }
 958         sb->u.ufs_sb.s_mount_opt = new_mount_opt;
 959         return 0;
 960 }
 961
 962 int ufs_statfs (struct super_block * sb, struct statfs * buf)
 963 {
 964         struct ufs_sb_private_info * uspi;
 965         struct ufs_super_block_first * usb1;
 966
 967         uspi = sb->u.ufs_sb.s_uspi;
 968         usb1 = ubh_get_usb_first (USPI_UBH);
 969
 970         buf->f_type = UFS_MAGIC;
 971         buf->f_bsize = sb->s_blocksize;
 972         buf->f_blocks = uspi->s_dsize;
 973         buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
 974                 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 975         buf->f_bavail = (buf->f_bfree > ((buf->f_blocks / 100) * uspi->s_minfree))
 976                 ? (buf->f_bfree - ((buf->f_blocks / 100) * uspi->s_minfree)) : 0;
 977         buf->f_files = uspi->s_ncg * uspi->s_ipg;
 978         buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 979         buf->f_namelen = UFS_MAXNAMLEN;
 980         return 0;
 981 }
 982
 983 static struct super_operations ufs_super_ops = {
 984         read_inode:     ufs_read_inode,
 985         write_inode:    ufs_write_inode,
 986         delete_inode:   ufs_delete_inode,
 987         put_super:      ufs_put_super,
 988         write_super:    ufs_write_super,
 989         statfs:         ufs_statfs,
 990         remount_fs:     ufs_remount,
 991 };
 992
 993 static DECLARE_FSTYPE_DEV(ufs_fs_type, "ufs", ufs_read_super);
 994
 995 static int __init init_ufs_fs(void)
 996 {
 997         return register_filesystem(&ufs_fs_type);
 998 }
 999
1000 static void __exit exit_ufs_fs(void)
1001 {
1002         unregister_filesystem(&ufs_fs_type);
1003 }
1004
1005 EXPORT_NO_SYMBOLS;
1006
1007 module_init(init_ufs_fs)
1008 module_exit(exit_ufs_fs)
1009 MODULE_LICENSE("GPL");