git.oblomov.eu Git - linux-2.6/blob - fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gertjan@cs.vu.nl>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  */
  65
  66
  67 #include <linux/config.h>
  68 #include <linux/module.h>
  69 #include <linux/bitops.h>
  70
  71 #include <stdarg.h>
  72
  73 #include <asm/uaccess.h>
  74 #include <asm/system.h>
  75
  76 #include <linux/errno.h>
  77 #include <linux/fs.h>
  78 #include <linux/ufs_fs.h>
  79 #include <linux/slab.h>
  80 #include <linux/time.h>
  81 #include <linux/stat.h>
  82 #include <linux/string.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/init.h>
  85 #include <linux/parser.h>
  86 #include <linux/smp_lock.h>
  87 #include <linux/buffer_head.h>
  88 #include <linux/vfs.h>
  89
  90 #include "swab.h"
  91 #include "util.h"
  92
  93 #undef UFS_SUPER_DEBUG
  94 #undef UFS_SUPER_DEBUG_MORE
  95
  96
  97 #undef UFS_SUPER_DEBUG_MORE
  98 #ifdef UFS_SUPER_DEBUG
  99 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
 100 #else
 101 #define UFSD(x)
 102 #endif
 103
 104 #ifdef UFS_SUPER_DEBUG_MORE
 105 /*
 106  * Print contents of ufs_super_block, useful for debugging
 107  */
 108 void ufs_print_super_stuff(struct super_block *sb,
 109         struct ufs_super_block_first * usb1,
 110         struct ufs_super_block_second * usb2,
 111         struct ufs_super_block_third * usb3)
 112 {
 113         printk("ufs_print_super_stuff\n");
 114         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
 115         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
 116         printk("  sblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 117         printk("  cblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 118         printk("  iblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 119         printk("  dblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 120         printk("  cgoffset:      %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
 121         printk("  ~cgmask:       0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
 122         printk("  size:          %u\n", fs32_to_cpu(sb, usb1->fs_size));
 123         printk("  dsize:         %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 124         printk("  ncg:           %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 125         printk("  bsize:         %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 126         printk("  fsize:         %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 127         printk("  frag:          %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 128         printk("  fragshift:     %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
 129         printk("  ~fmask:        %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 130         printk("  fshift:        %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 131         printk("  sbsize:        %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 132         printk("  spc:           %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 133         printk("  cpg:           %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 134         printk("  ipg:           %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 135         printk("  fpg:           %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 136         printk("  csaddr:        %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 137         printk("  cssize:        %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 138         printk("  cgsize:        %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 139         printk("  fstodb:        %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
 140         printk("  contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
 141         printk("  postblformat:  %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
 142         printk("  nrpos:         %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 143         printk("  ndir           %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 144         printk("  nifree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 145         printk("  nbfree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 146         printk("  nffree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 147         printk("\n");
 148 }
 149
 150 /*
 151  * Print contents of ufs2 ufs_super_block, useful for debugging
 152  */
 153 void ufs2_print_super_stuff(
 154      struct super_block *sb,
 155       struct ufs_super_block *usb)
 156 {
 157         printk("ufs_print_super_stuff\n");
 158         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
 159         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb->fs_magic));
 160         printk("  fs_size:   %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size));
 161         printk("  fs_dsize:  %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize));
 162         printk("  bsize:         %u\n", fs32_to_cpu(usb, usb->fs_bsize));
 163         printk("  fsize:         %u\n", fs32_to_cpu(usb, usb->fs_fsize));
 164         printk("  fs_volname:  %s\n", usb->fs_u11.fs_u2.fs_volname);
 165         printk("  fs_fsmnt:  %s\n", usb->fs_u11.fs_u2.fs_fsmnt);
 166         printk("  fs_sblockloc: %u\n",fs64_to_cpu(sb,
 167                         usb->fs_u11.fs_u2.fs_sblockloc));
 168         printk("  cs_ndir(No of dirs):  %u\n",fs64_to_cpu(sb,
 169                         usb->fs_u11.fs_u2.fs_cstotal.cs_ndir));
 170         printk("  cs_nbfree(No of free blocks):  %u\n",fs64_to_cpu(sb,
 171                         usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree));
 172         printk("\n");
 173 }
 174
 175 /*
 176  * Print contents of ufs_cylinder_group, useful for debugging
 177  */
 178 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
 179 {
 180         printk("\nufs_print_cylinder_stuff\n");
 181         printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
 182         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 183         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 184         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 185         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 186         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 187         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 188         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 189         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 190         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 191         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 192         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 193         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 194         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 195         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 196             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 197             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 198             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 199             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 200         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 201         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 202         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 203         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 204         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 205         printk("  clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 206         printk("  clusteroff    %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 207         printk("  nclusterblks  %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 208         printk("\n");
 209 }
 210 #endif /* UFS_SUPER_DEBUG_MORE */
 211
 212 static struct super_operations ufs_super_ops;
 213
 214 static char error_buf[1024];
 215
 216 void ufs_error (struct super_block * sb, const char * function,
 217         const char * fmt, ...)
 218 {
 219         struct ufs_sb_private_info * uspi;
 220         struct ufs_super_block_first * usb1;
 221         va_list args;
 222
 223         uspi = UFS_SB(sb)->s_uspi;
 224         usb1 = ubh_get_usb_first(uspi);
 225
 226         if (!(sb->s_flags & MS_RDONLY)) {
 227                 usb1->fs_clean = UFS_FSBAD;
 228                 ubh_mark_buffer_dirty(USPI_UBH);
 229                 sb->s_dirt = 1;
 230                 sb->s_flags |= MS_RDONLY;
 231         }
 232         va_start (args, fmt);
 233         vsprintf (error_buf, fmt, args);
 234         va_end (args);
 235         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 236         case UFS_MOUNT_ONERROR_PANIC:
 237                 panic ("UFS-fs panic (device %s): %s: %s\n",
 238                         sb->s_id, function, error_buf);
 239
 240         case UFS_MOUNT_ONERROR_LOCK:
 241         case UFS_MOUNT_ONERROR_UMOUNT:
 242         case UFS_MOUNT_ONERROR_REPAIR:
 243                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 244                         sb->s_id, function, error_buf);
 245         }
 246 }
 247
 248 void ufs_panic (struct super_block * sb, const char * function,
 249         const char * fmt, ...)
 250 {
 251         struct ufs_sb_private_info * uspi;
 252         struct ufs_super_block_first * usb1;
 253         va_list args;
 254
 255         uspi = UFS_SB(sb)->s_uspi;
 256         usb1 = ubh_get_usb_first(uspi);
 257
 258         if (!(sb->s_flags & MS_RDONLY)) {
 259                 usb1->fs_clean = UFS_FSBAD;
 260                 ubh_mark_buffer_dirty(USPI_UBH);
 261                 sb->s_dirt = 1;
 262         }
 263         va_start (args, fmt);
 264         vsprintf (error_buf, fmt, args);
 265         va_end (args);
 266         sb->s_flags |= MS_RDONLY;
 267         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 268                 sb->s_id, function, error_buf);
 269 }
 270
 271 void ufs_warning (struct super_block * sb, const char * function,
 272         const char * fmt, ...)
 273 {
 274         va_list args;
 275
 276         va_start (args, fmt);
 277         vsprintf (error_buf, fmt, args);
 278         va_end (args);
 279         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 280                 sb->s_id, function, error_buf);
 281 }
 282
 283 enum {
 284         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
 285         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 286         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 287         Opt_onerror_umount, Opt_onerror_repair, Opt_err
 288 };
 289
 290 static match_table_t tokens = {
 291         {Opt_type_old, "ufstype=old"},
 292         {Opt_type_sunx86, "ufstype=sunx86"},
 293         {Opt_type_sun, "ufstype=sun"},
 294         {Opt_type_44bsd, "ufstype=44bsd"},
 295         {Opt_type_ufs2, "ufstype=ufs2"},
 296         {Opt_type_ufs2, "ufstype=5xbsd"},
 297         {Opt_type_hp, "ufstype=hp"},
 298         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 299         {Opt_type_nextstep, "ufstype=nextstep"},
 300         {Opt_type_openstep, "ufstype=openstep"},
 301         {Opt_onerror_panic, "onerror=panic"},
 302         {Opt_onerror_lock, "onerror=lock"},
 303         {Opt_onerror_umount, "onerror=umount"},
 304         {Opt_onerror_repair, "onerror=repair"},
 305         {Opt_err, NULL}
 306 };
 307
 308 static int ufs_parse_options (char * options, unsigned * mount_options)
 309 {
 310         char * p;
 311
 312         UFSD(("ENTER\n"))
 313
 314         if (!options)
 315                 return 1;
 316
 317         while ((p = strsep(&options, ",")) != NULL) {
 318                 substring_t args[MAX_OPT_ARGS];
 319                 int token;
 320                 if (!*p)
 321                         continue;
 322
 323                 token = match_token(p, tokens, args);
 324                 switch (token) {
 325                 case Opt_type_old:
 326                         ufs_clear_opt (*mount_options, UFSTYPE);
 327                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 328                         break;
 329                 case Opt_type_sunx86:
 330                         ufs_clear_opt (*mount_options, UFSTYPE);
 331                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 332                         break;
 333                 case Opt_type_sun:
 334                         ufs_clear_opt (*mount_options, UFSTYPE);
 335                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 336                         break;
 337                 case Opt_type_44bsd:
 338                         ufs_clear_opt (*mount_options, UFSTYPE);
 339                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 340                         break;
 341                 case Opt_type_ufs2:
 342                         ufs_clear_opt(*mount_options, UFSTYPE);
 343                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 344                         break;
 345                 case Opt_type_hp:
 346                         ufs_clear_opt (*mount_options, UFSTYPE);
 347                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 348                         break;
 349                 case Opt_type_nextstepcd:
 350                         ufs_clear_opt (*mount_options, UFSTYPE);
 351                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 352                         break;
 353                 case Opt_type_nextstep:
 354                         ufs_clear_opt (*mount_options, UFSTYPE);
 355                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 356                         break;
 357                 case Opt_type_openstep:
 358                         ufs_clear_opt (*mount_options, UFSTYPE);
 359                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 360                         break;
 361                 case Opt_onerror_panic:
 362                         ufs_clear_opt (*mount_options, ONERROR);
 363                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 364                         break;
 365                 case Opt_onerror_lock:
 366                         ufs_clear_opt (*mount_options, ONERROR);
 367                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 368                         break;
 369                 case Opt_onerror_umount:
 370                         ufs_clear_opt (*mount_options, ONERROR);
 371                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 372                         break;
 373                 case Opt_onerror_repair:
 374                         printk("UFS-fs: Unable to do repair on error, "
 375                                 "will lock lock instead\n");
 376                         ufs_clear_opt (*mount_options, ONERROR);
 377                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 378                         break;
 379                 default:
 380                         printk("UFS-fs: Invalid option: \"%s\" "
 381                                         "or missing value\n", p);
 382                         return 0;
 383                 }
 384         }
 385         return 1;
 386 }
 387
 388 /*
 389  * Read on-disk structures associated with cylinder groups
 390  */
 391 static int ufs_read_cylinder_structures (struct super_block *sb) {
 392         struct ufs_sb_info * sbi = UFS_SB(sb);
 393         struct ufs_sb_private_info * uspi;
 394         struct ufs_super_block *usb;
 395         struct ufs_buffer_head * ubh;
 396         unsigned char * base, * space;
 397         unsigned size, blks, i;
 398         unsigned flags = 0;
 399
 400         UFSD(("ENTER\n"))
 401
 402         uspi = sbi->s_uspi;
 403
 404         usb  = (struct ufs_super_block *)
 405                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
 406
 407         flags = UFS_SB(sb)->s_flags;
 408
 409         /*
 410          * Read cs structures from (usually) first data block
 411          * on the device.
 412          */
 413         size = uspi->s_cssize;
 414         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 415         base = space = kmalloc(size, GFP_KERNEL);
 416         if (!base)
 417                 goto failed;
 418         for (i = 0; i < blks; i += uspi->s_fpb) {
 419                 size = uspi->s_bsize;
 420                 if (i + uspi->s_fpb > blks)
 421                         size = (blks - i) * uspi->s_fsize;
 422
 423                 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 424                         ubh = ubh_bread(sb,
 425                                 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
 426                 else
 427                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 428
 429                 if (!ubh)
 430                         goto failed;
 431
 432                 ubh_ubhcpymem (space, ubh, size);
 433                 sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space;
 434
 435                 space += size;
 436                 ubh_brelse (ubh);
 437                 ubh = NULL;
 438         }
 439
 440         /*
 441          * Read cylinder group (we read only first fragment from block
 442          * at this time) and prepare internal data structures for cg caching.
 443          */
 444         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 445                 goto failed;
 446         for (i = 0; i < uspi->s_ncg; i++)
 447                 sbi->s_ucg[i] = NULL;
 448         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 449                 sbi->s_ucpi[i] = NULL;
 450                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 451         }
 452         for (i = 0; i < uspi->s_ncg; i++) {
 453                 UFSD(("read cg %u\n", i))
 454                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 455                         goto failed;
 456                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 457                         goto failed;
 458 #ifdef UFS_SUPER_DEBUG_MORE
 459                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 460 #endif
 461         }
 462         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 463                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 464                         goto failed;
 465                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 466         }
 467         sbi->s_cg_loaded = 0;
 468         UFSD(("EXIT\n"))
 469         return 1;
 470
 471 failed:
 472         kfree (base);
 473         if (sbi->s_ucg) {
 474                 for (i = 0; i < uspi->s_ncg; i++)
 475                         if (sbi->s_ucg[i])
 476                                 brelse (sbi->s_ucg[i]);
 477                 kfree (sbi->s_ucg);
 478                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 479                         kfree (sbi->s_ucpi[i]);
 480         }
 481         UFSD(("EXIT (FAILED)\n"))
 482         return 0;
 483 }
 484
 485 /*
 486  * Put on-disk structures associated with cylinder groups and
 487  * write them back to disk
 488  */
 489 static void ufs_put_cylinder_structures (struct super_block *sb) {
 490         struct ufs_sb_info * sbi = UFS_SB(sb);
 491         struct ufs_sb_private_info * uspi;
 492         struct ufs_buffer_head * ubh;
 493         unsigned char * base, * space;
 494         unsigned blks, size, i;
 495
 496         UFSD(("ENTER\n"))
 497
 498         uspi = sbi->s_uspi;
 499
 500         size = uspi->s_cssize;
 501         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 502         base = space = (char*) sbi->s_csp[0];
 503         for (i = 0; i < blks; i += uspi->s_fpb) {
 504                 size = uspi->s_bsize;
 505                 if (i + uspi->s_fpb > blks)
 506                         size = (blks - i) * uspi->s_fsize;
 507                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 508                 ubh_memcpyubh (ubh, space, size);
 509                 space += size;
 510                 ubh_mark_buffer_uptodate (ubh, 1);
 511                 ubh_mark_buffer_dirty (ubh);
 512                 ubh_brelse (ubh);
 513         }
 514         for (i = 0; i < sbi->s_cg_loaded; i++) {
 515                 ufs_put_cylinder (sb, i);
 516                 kfree (sbi->s_ucpi[i]);
 517         }
 518         for (; i < UFS_MAX_GROUP_LOADED; i++)
 519                 kfree (sbi->s_ucpi[i]);
 520         for (i = 0; i < uspi->s_ncg; i++)
 521                 brelse (sbi->s_ucg[i]);
 522         kfree (sbi->s_ucg);
 523         kfree (base);
 524         UFSD(("EXIT\n"))
 525 }
 526
 527 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 528 {
 529         struct ufs_sb_info * sbi;
 530         struct ufs_sb_private_info * uspi;
 531         struct ufs_super_block_first * usb1;
 532         struct ufs_super_block_second * usb2;
 533         struct ufs_super_block_third * usb3;
 534         struct ufs_super_block *usb;
 535         struct ufs_buffer_head * ubh;
 536         struct inode *inode;
 537         unsigned block_size, super_block_size;
 538         unsigned flags;
 539         unsigned super_block_offset;
 540
 541         uspi = NULL;
 542         ubh = NULL;
 543         flags = 0;
 544
 545         UFSD(("ENTER\n"))
 546
 547         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 548         if (!sbi)
 549                 goto failed_nomem;
 550         sb->s_fs_info = sbi;
 551         memset(sbi, 0, sizeof(struct ufs_sb_info));
 552
 553         UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
 554
 555 #ifndef CONFIG_UFS_FS_WRITE
 556         if (!(sb->s_flags & MS_RDONLY)) {
 557                 printk("ufs was compiled with read-only support, "
 558                 "can't be mounted as read-write\n");
 559                 goto failed;
 560         }
 561 #endif
 562         /*
 563          * Set default mount options
 564          * Parse mount options
 565          */
 566         sbi->s_mount_opt = 0;
 567         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 568         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 569                 printk("wrong mount options\n");
 570                 goto failed;
 571         }
 572         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 573                 if (!silent)
 574                         printk("You didn't specify the type of your ufs filesystem\n\n"
 575                         "mount -t ufs -o ufstype="
 576                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
 577                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 578                         "default is ufstype=old\n");
 579                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 580         }
 581
 582         sbi->s_uspi = uspi =
 583                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 584         if (!uspi)
 585                 goto failed;
 586
 587         super_block_offset=UFS_SBLOCK;
 588
 589         /* Keep 2Gig file limit. Some UFS variants need to override
 590            this but as I don't know which I'll let those in the know loosen
 591            the rules */
 592         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 593         case UFS_MOUNT_UFSTYPE_44BSD:
 594                 UFSD(("ufstype=44bsd\n"))
 595                 uspi->s_fsize = block_size = 512;
 596                 uspi->s_fmask = ~(512 - 1);
 597                 uspi->s_fshift = 9;
 598                 uspi->s_sbsize = super_block_size = 1536;
 599                 uspi->s_sbbase = 0;
 600                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 601                 break;
 602         case UFS_MOUNT_UFSTYPE_UFS2:
 603                 UFSD(("ufstype=ufs2\n"));
 604                 super_block_offset=SBLOCK_UFS2;
 605                 uspi->s_fsize = block_size = 512;
 606                 uspi->s_fmask = ~(512 - 1);
 607                 uspi->s_fshift = 9;
 608                 uspi->s_sbsize = super_block_size = 1536;
 609                 uspi->s_sbbase =  0;
 610                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 611                 if (!(sb->s_flags & MS_RDONLY)) {
 612                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
 613                         sb->s_flags |= MS_RDONLY;
 614                 }
 615                 break;
 616
 617         case UFS_MOUNT_UFSTYPE_SUN:
 618                 UFSD(("ufstype=sun\n"))
 619                 uspi->s_fsize = block_size = 1024;
 620                 uspi->s_fmask = ~(1024 - 1);
 621                 uspi->s_fshift = 10;
 622                 uspi->s_sbsize = super_block_size = 2048;
 623                 uspi->s_sbbase = 0;
 624                 uspi->s_maxsymlinklen = 56;
 625                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 626                 break;
 627
 628         case UFS_MOUNT_UFSTYPE_SUNx86:
 629                 UFSD(("ufstype=sunx86\n"))
 630                 uspi->s_fsize = block_size = 1024;
 631                 uspi->s_fmask = ~(1024 - 1);
 632                 uspi->s_fshift = 10;
 633                 uspi->s_sbsize = super_block_size = 2048;
 634                 uspi->s_sbbase = 0;
 635                 uspi->s_maxsymlinklen = 56;
 636                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 637                 break;
 638
 639         case UFS_MOUNT_UFSTYPE_OLD:
 640                 UFSD(("ufstype=old\n"))
 641                 uspi->s_fsize = block_size = 1024;
 642                 uspi->s_fmask = ~(1024 - 1);
 643                 uspi->s_fshift = 10;
 644                 uspi->s_sbsize = super_block_size = 2048;
 645                 uspi->s_sbbase = 0;
 646                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 647                 if (!(sb->s_flags & MS_RDONLY)) {
 648                         if (!silent)
 649                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 650                         sb->s_flags |= MS_RDONLY;
 651                 }
 652                 break;
 653
 654         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 655                 UFSD(("ufstype=nextstep\n"))
 656                 uspi->s_fsize = block_size = 1024;
 657                 uspi->s_fmask = ~(1024 - 1);
 658                 uspi->s_fshift = 10;
 659                 uspi->s_sbsize = super_block_size = 2048;
 660                 uspi->s_sbbase = 0;
 661                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 662                 if (!(sb->s_flags & MS_RDONLY)) {
 663                         if (!silent)
 664                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 665                         sb->s_flags |= MS_RDONLY;
 666                 }
 667                 break;
 668
 669         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 670                 UFSD(("ufstype=nextstep-cd\n"))
 671                 uspi->s_fsize = block_size = 2048;
 672                 uspi->s_fmask = ~(2048 - 1);
 673                 uspi->s_fshift = 11;
 674                 uspi->s_sbsize = super_block_size = 2048;
 675                 uspi->s_sbbase = 0;
 676                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 677                 if (!(sb->s_flags & MS_RDONLY)) {
 678                         if (!silent)
 679                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 680                         sb->s_flags |= MS_RDONLY;
 681                 }
 682                 break;
 683
 684         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 685                 UFSD(("ufstype=openstep\n"))
 686                 uspi->s_fsize = block_size = 1024;
 687                 uspi->s_fmask = ~(1024 - 1);
 688                 uspi->s_fshift = 10;
 689                 uspi->s_sbsize = super_block_size = 2048;
 690                 uspi->s_sbbase = 0;
 691                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 692                 if (!(sb->s_flags & MS_RDONLY)) {
 693                         if (!silent)
 694                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 695                         sb->s_flags |= MS_RDONLY;
 696                 }
 697                 break;
 698
 699         case UFS_MOUNT_UFSTYPE_HP:
 700                 UFSD(("ufstype=hp\n"))
 701                 uspi->s_fsize = block_size = 1024;
 702                 uspi->s_fmask = ~(1024 - 1);
 703                 uspi->s_fshift = 10;
 704                 uspi->s_sbsize = super_block_size = 2048;
 705                 uspi->s_sbbase = 0;
 706                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 707                 if (!(sb->s_flags & MS_RDONLY)) {
 708                         if (!silent)
 709                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 710                         sb->s_flags |= MS_RDONLY;
 711                 }
 712                 break;
 713         default:
 714                 if (!silent)
 715                         printk("unknown ufstype\n");
 716                 goto failed;
 717         }
 718
 719 again:
 720         if (!sb_set_blocksize(sb, block_size)) {
 721                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 722                 goto failed;
 723         }
 724
 725         /*
 726          * read ufs super block from device
 727          */
 728
 729         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 730
 731         if (!ubh)
 732             goto failed;
 733
 734
 735         usb1 = ubh_get_usb_first(uspi);
 736         usb2 = ubh_get_usb_second(uspi);
 737         usb3 = ubh_get_usb_third(uspi);
 738         usb  = (struct ufs_super_block *)
 739                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
 740
 741         /*
 742          * Check ufs magic number
 743          */
 744         sbi->s_bytesex = BYTESEX_LE;
 745         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 746                 case UFS_MAGIC:
 747                 case UFS2_MAGIC:
 748                 case UFS_MAGIC_LFN:
 749                 case UFS_MAGIC_FEA:
 750                 case UFS_MAGIC_4GB:
 751                         goto magic_found;
 752         }
 753         sbi->s_bytesex = BYTESEX_BE;
 754         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 755                 case UFS_MAGIC:
 756                 case UFS2_MAGIC:
 757                 case UFS_MAGIC_LFN:
 758                 case UFS_MAGIC_FEA:
 759                 case UFS_MAGIC_4GB:
 760                         goto magic_found;
 761         }
 762
 763         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 764           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 765           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 766           && uspi->s_sbbase < 256) {
 767                 ubh_brelse_uspi(uspi);
 768                 ubh = NULL;
 769                 uspi->s_sbbase += 8;
 770                 goto again;
 771         }
 772         if (!silent)
 773                 printk("ufs_read_super: bad magic number\n");
 774         goto failed;
 775
 776 magic_found:
 777         /*
 778          * Check block and fragment sizes
 779          */
 780         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 781         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 782         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 783         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 784         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 785
 786         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
 787                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 788                         uspi->s_fsize);
 789                         goto failed;
 790         }
 791         if (uspi->s_fsize < 512) {
 792                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 793                         uspi->s_fsize);
 794                 goto failed;
 795         }
 796         if (uspi->s_fsize > 4096) {
 797                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 798                         uspi->s_fsize);
 799                 goto failed;
 800         }
 801         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
 802                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 803                         uspi->s_bsize);
 804                 goto failed;
 805         }
 806         if (uspi->s_bsize < 4096) {
 807                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 808                         uspi->s_bsize);
 809                 goto failed;
 810         }
 811         if (uspi->s_bsize / uspi->s_fsize > 8) {
 812                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 813                         uspi->s_bsize / uspi->s_fsize);
 814                 goto failed;
 815         }
 816         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 817                 ubh_brelse_uspi(uspi);
 818                 ubh = NULL;
 819                 block_size = uspi->s_fsize;
 820                 super_block_size = uspi->s_sbsize;
 821                 UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
 822                 goto again;
 823         }
 824
 825 #ifdef UFS_SUPER_DEBUG_MORE
 826         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 827                 ufs2_print_super_stuff(sb,usb);
 828         else
 829                 ufs_print_super_stuff(sb, usb1, usb2, usb3);
 830 #endif
 831
 832         /*
 833          * Check, if file system was correctly unmounted.
 834          * If not, make it read only.
 835          */
 836         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 837           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 838           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 839           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 840           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 841                 switch(usb1->fs_clean) {
 842                 case UFS_FSCLEAN:
 843                         UFSD(("fs is clean\n"))
 844                         break;
 845                 case UFS_FSSTABLE:
 846                         UFSD(("fs is stable\n"))
 847                         break;
 848                 case UFS_FSOSF1:
 849                         UFSD(("fs is DEC OSF/1\n"))
 850                         break;
 851                 case UFS_FSACTIVE:
 852                         printk("ufs_read_super: fs is active\n");
 853                         sb->s_flags |= MS_RDONLY;
 854                         break;
 855                 case UFS_FSBAD:
 856                         printk("ufs_read_super: fs is bad\n");
 857                         sb->s_flags |= MS_RDONLY;
 858                         break;
 859                 default:
 860                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 861                         sb->s_flags |= MS_RDONLY;
 862                         break;
 863                 }
 864         }
 865         else {
 866                 printk("ufs_read_super: fs needs fsck\n");
 867                 sb->s_flags |= MS_RDONLY;
 868         }
 869
 870         /*
 871          * Read ufs_super_block into internal data structures
 872          */
 873         sb->s_op = &ufs_super_ops;
 874         sb->dq_op = NULL; /***/
 875         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 876
 877         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 878         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 879         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 880         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 881         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 882         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 883
 884         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 885                 uspi->s_u2_size  = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
 886                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
 887         }
 888         else {
 889                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 890                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 891         }
 892
 893         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 894         /* s_bsize already set */
 895         /* s_fsize already set */
 896         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 897         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 898         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 899         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 900         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 901         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 902         UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
 903                 uspi->s_fshift));
 904         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 905         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 906         /* s_sbsize already set */
 907         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 908         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 909         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 910         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 911         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 912         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 913         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 914         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 915         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 916         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 917         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 918         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 919         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 920         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 921         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 922         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 923         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
 924         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
 925         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 926         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 927         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 928         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 929         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
 930         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
 931
 932         /*
 933          * Compute another frequently used values
 934          */
 935         uspi->s_fpbmask = uspi->s_fpb - 1;
 936         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 937                 uspi->s_apbshift = uspi->s_bshift - 3;
 938         }
 939         else {
 940                 uspi->s_apbshift = uspi->s_bshift - 2;
 941         }
 942         uspi->s_2apbshift = uspi->s_apbshift * 2;
 943         uspi->s_3apbshift = uspi->s_apbshift * 3;
 944         uspi->s_apb = 1 << uspi->s_apbshift;
 945         uspi->s_2apb = 1 << uspi->s_2apbshift;
 946         uspi->s_3apb = 1 << uspi->s_3apbshift;
 947         uspi->s_apbmask = uspi->s_apb - 1;
 948         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
 949         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
 950         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
 951         uspi->s_bpf = uspi->s_fsize << 3;
 952         uspi->s_bpfshift = uspi->s_fshift + 3;
 953         uspi->s_bpfmask = uspi->s_bpf - 1;
 954         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
 955             UFS_MOUNT_UFSTYPE_44BSD)
 956                 uspi->s_maxsymlinklen =
 957                     fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
 958
 959         sbi->s_flags = flags;
 960
 961         inode = iget(sb, UFS_ROOTINO);
 962         if (!inode || is_bad_inode(inode))
 963                 goto failed;
 964         sb->s_root = d_alloc_root(inode);
 965         if (!sb->s_root)
 966                 goto dalloc_failed;
 967
 968
 969         /*
 970          * Read cylinder group structures
 971          */
 972         if (!(sb->s_flags & MS_RDONLY))
 973                 if (!ufs_read_cylinder_structures(sb))
 974                         goto failed;
 975
 976         UFSD(("EXIT\n"))
 977         return 0;
 978
 979 dalloc_failed:
 980         iput(inode);
 981 failed:
 982         if (ubh)
 983                 ubh_brelse_uspi (uspi);
 984         kfree (uspi);
 985         kfree(sbi);
 986         sb->s_fs_info = NULL;
 987         UFSD(("EXIT (FAILED)\n"))
 988         return -EINVAL;
 989
 990 failed_nomem:
 991         UFSD(("EXIT (NOMEM)\n"))
 992         return -ENOMEM;
 993 }
 994
 995 static void ufs_write_super (struct super_block *sb) {
 996         struct ufs_sb_private_info * uspi;
 997         struct ufs_super_block_first * usb1;
 998         struct ufs_super_block_third * usb3;
 999         unsigned flags;
1000
1001         lock_kernel();
1002
1003         UFSD(("ENTER\n"))
1004         flags = UFS_SB(sb)->s_flags;
1005         uspi = UFS_SB(sb)->s_uspi;
1006         usb1 = ubh_get_usb_first(uspi);
1007         usb3 = ubh_get_usb_third(uspi);
1008
1009         if (!(sb->s_flags & MS_RDONLY)) {
1010                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1011                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1012                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1013                         ufs_set_fs_state(sb, usb1, usb3,
1014                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1015                 ubh_mark_buffer_dirty (USPI_UBH);
1016         }
1017         sb->s_dirt = 0;
1018         UFSD(("EXIT\n"))
1019         unlock_kernel();
1020 }
1021
1022 static void ufs_put_super (struct super_block *sb)
1023 {
1024         struct ufs_sb_info * sbi = UFS_SB(sb);
1025
1026         UFSD(("ENTER\n"))
1027
1028         if (!(sb->s_flags & MS_RDONLY))
1029                 ufs_put_cylinder_structures (sb);
1030
1031         ubh_brelse_uspi (sbi->s_uspi);
1032         kfree (sbi->s_uspi);
1033         kfree (sbi);
1034         sb->s_fs_info = NULL;
1035         return;
1036 }
1037
1038
1039 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1040 {
1041         struct ufs_sb_private_info * uspi;
1042         struct ufs_super_block_first * usb1;
1043         struct ufs_super_block_third * usb3;
1044         unsigned new_mount_opt, ufstype;
1045         unsigned flags;
1046
1047         uspi = UFS_SB(sb)->s_uspi;
1048         flags = UFS_SB(sb)->s_flags;
1049         usb1 = ubh_get_usb_first(uspi);
1050         usb3 = ubh_get_usb_third(uspi);
1051
1052         /*
1053          * Allow the "check" option to be passed as a remount option.
1054          * It is not possible to change ufstype option during remount
1055          */
1056         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1057         new_mount_opt = 0;
1058         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1059         if (!ufs_parse_options (data, &new_mount_opt))
1060                 return -EINVAL;
1061         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1062                 new_mount_opt |= ufstype;
1063         }
1064         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1065                 printk("ufstype can't be changed during remount\n");
1066                 return -EINVAL;
1067         }
1068
1069         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1070                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1071                 return 0;
1072         }
1073
1074         /*
1075          * fs was mouted as rw, remounting ro
1076          */
1077         if (*mount_flags & MS_RDONLY) {
1078                 ufs_put_cylinder_structures(sb);
1079                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1080                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1081                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1082                         ufs_set_fs_state(sb, usb1, usb3,
1083                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1084                 ubh_mark_buffer_dirty (USPI_UBH);
1085                 sb->s_dirt = 0;
1086                 sb->s_flags |= MS_RDONLY;
1087         }
1088         /*
1089          * fs was mounted as ro, remounting rw
1090          */
1091         else {
1092 #ifndef CONFIG_UFS_FS_WRITE
1093                 printk("ufs was compiled with read-only support, "
1094                 "can't be mounted as read-write\n");
1095                 return -EINVAL;
1096 #else
1097                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1098                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1099                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1100                         printk("this ufstype is read-only supported\n");
1101                         return -EINVAL;
1102                 }
1103                 if (!ufs_read_cylinder_structures (sb)) {
1104                         printk("failed during remounting\n");
1105                         return -EPERM;
1106                 }
1107                 sb->s_flags &= ~MS_RDONLY;
1108 #endif
1109         }
1110         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1111         return 0;
1112 }
1113
1114 static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
1115 {
1116         struct ufs_sb_private_info * uspi;
1117         struct ufs_super_block_first * usb1;
1118         struct ufs_super_block * usb;
1119         unsigned  flags = 0;
1120
1121         lock_kernel();
1122
1123         uspi = UFS_SB(sb)->s_uspi;
1124         usb1 = ubh_get_usb_first (uspi);
1125         usb  = (struct ufs_super_block *)
1126                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1127
1128         flags = UFS_SB(sb)->s_flags;
1129         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1130                 buf->f_type = UFS2_MAGIC;
1131                 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1132                 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1133                         fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1134                 buf->f_ffree = fs64_to_cpu(sb,
1135                         usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1136         }
1137         else {
1138                 buf->f_type = UFS_MAGIC;
1139                 buf->f_blocks = uspi->s_dsize;
1140                 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1141                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1142                 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1143         }
1144         buf->f_bsize = sb->s_blocksize;
1145         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1146                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1147         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1148         buf->f_namelen = UFS_MAXNAMLEN;
1149
1150         unlock_kernel();
1151
1152         return 0;
1153 }
1154
1155 static kmem_cache_t * ufs_inode_cachep;
1156
1157 static struct inode *ufs_alloc_inode(struct super_block *sb)
1158 {
1159         struct ufs_inode_info *ei;
1160         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1161         if (!ei)
1162                 return NULL;
1163         ei->vfs_inode.i_version = 1;
1164         return &ei->vfs_inode;
1165 }
1166
1167 static void ufs_destroy_inode(struct inode *inode)
1168 {
1169         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1170 }
1171
1172 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1173 {
1174         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1175
1176         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1177             SLAB_CTOR_CONSTRUCTOR)
1178                 inode_init_once(&ei->vfs_inode);
1179 }
1180
1181 static int init_inodecache(void)
1182 {
1183         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1184                                              sizeof(struct ufs_inode_info),
1185                                              0, SLAB_RECLAIM_ACCOUNT,
1186                                              init_once, NULL);
1187         if (ufs_inode_cachep == NULL)
1188                 return -ENOMEM;
1189         return 0;
1190 }
1191
1192 static void destroy_inodecache(void)
1193 {
1194         if (kmem_cache_destroy(ufs_inode_cachep))
1195                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1196 }
1197
1198 #ifdef CONFIG_QUOTA
1199 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1200 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1201 #endif
1202
1203 static struct super_operations ufs_super_ops = {
1204         .alloc_inode    = ufs_alloc_inode,
1205         .destroy_inode  = ufs_destroy_inode,
1206         .read_inode     = ufs_read_inode,
1207         .write_inode    = ufs_write_inode,
1208         .delete_inode   = ufs_delete_inode,
1209         .put_super      = ufs_put_super,
1210         .write_super    = ufs_write_super,
1211         .statfs         = ufs_statfs,
1212         .remount_fs     = ufs_remount,
1213 #ifdef CONFIG_QUOTA
1214         .quota_read     = ufs_quota_read,
1215         .quota_write    = ufs_quota_write,
1216 #endif
1217 };
1218
1219 #ifdef CONFIG_QUOTA
1220
1221 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1222  * acquiring the locks... As quota files are never truncated and quota code
1223  * itself serializes the operations (and noone else should touch the files)
1224  * we don't have to be afraid of races */
1225 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1226                                size_t len, loff_t off)
1227 {
1228         struct inode *inode = sb_dqopt(sb)->files[type];
1229         sector_t blk = off >> sb->s_blocksize_bits;
1230         int err = 0;
1231         int offset = off & (sb->s_blocksize - 1);
1232         int tocopy;
1233         size_t toread;
1234         struct buffer_head *bh;
1235         loff_t i_size = i_size_read(inode);
1236
1237         if (off > i_size)
1238                 return 0;
1239         if (off+len > i_size)
1240                 len = i_size-off;
1241         toread = len;
1242         while (toread > 0) {
1243                 tocopy = sb->s_blocksize - offset < toread ?
1244                                 sb->s_blocksize - offset : toread;
1245
1246                 bh = ufs_bread(inode, blk, 0, &err);
1247                 if (err)
1248                         return err;
1249                 if (!bh)        /* A hole? */
1250                         memset(data, 0, tocopy);
1251                 else {
1252                         memcpy(data, bh->b_data+offset, tocopy);
1253                         brelse(bh);
1254                 }
1255                 offset = 0;
1256                 toread -= tocopy;
1257                 data += tocopy;
1258                 blk++;
1259         }
1260         return len;
1261 }
1262
1263 /* Write to quotafile */
1264 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1265                                 const char *data, size_t len, loff_t off)
1266 {
1267         struct inode *inode = sb_dqopt(sb)->files[type];
1268         sector_t blk = off >> sb->s_blocksize_bits;
1269         int err = 0;
1270         int offset = off & (sb->s_blocksize - 1);
1271         int tocopy;
1272         size_t towrite = len;
1273         struct buffer_head *bh;
1274
1275         mutex_lock(&inode->i_mutex);
1276         while (towrite > 0) {
1277                 tocopy = sb->s_blocksize - offset < towrite ?
1278                                 sb->s_blocksize - offset : towrite;
1279
1280                 bh = ufs_bread(inode, blk, 1, &err);
1281                 if (!bh)
1282                         goto out;
1283                 lock_buffer(bh);
1284                 memcpy(bh->b_data+offset, data, tocopy);
1285                 flush_dcache_page(bh->b_page);
1286                 set_buffer_uptodate(bh);
1287                 mark_buffer_dirty(bh);
1288                 unlock_buffer(bh);
1289                 brelse(bh);
1290                 offset = 0;
1291                 towrite -= tocopy;
1292                 data += tocopy;
1293                 blk++;
1294         }
1295 out:
1296         if (len == towrite) {
1297                 mutex_unlock(&inode->i_mutex);
1298                 return err;
1299         }
1300         if (inode->i_size < off+len-towrite)
1301                 i_size_write(inode, off+len-towrite);
1302         inode->i_version++;
1303         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1304         mark_inode_dirty(inode);
1305         mutex_unlock(&inode->i_mutex);
1306         return len - towrite;
1307 }
1308
1309 #endif
1310
1311 static struct super_block *ufs_get_sb(struct file_system_type *fs_type,
1312         int flags, const char *dev_name, void *data)
1313 {
1314         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super);
1315 }
1316
1317 static struct file_system_type ufs_fs_type = {
1318         .owner          = THIS_MODULE,
1319         .name           = "ufs",
1320         .get_sb         = ufs_get_sb,
1321         .kill_sb        = kill_block_super,
1322         .fs_flags       = FS_REQUIRES_DEV,
1323 };
1324
1325 static int __init init_ufs_fs(void)
1326 {
1327         int err = init_inodecache();
1328         if (err)
1329                 goto out1;
1330         err = register_filesystem(&ufs_fs_type);
1331         if (err)
1332                 goto out;
1333         return 0;
1334 out:
1335         destroy_inodecache();
1336 out1:
1337         return err;
1338 }
1339
1340 static void __exit exit_ufs_fs(void)
1341 {
1342         unregister_filesystem(&ufs_fs_type);
1343         destroy_inodecache();
1344 }
1345
1346 module_init(init_ufs_fs)
1347 module_exit(exit_ufs_fs)
1348 MODULE_LICENSE("GPL");