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   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gertjan@cs.vu.nl>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  */
  65
  66
  67 #include <linux/config.h>
  68 #include <linux/module.h>
  69 #include <linux/bitops.h>
  70
  71 #include <stdarg.h>
  72
  73 #include <asm/uaccess.h>
  74 #include <asm/system.h>
  75
  76 #include <linux/errno.h>
  77 #include <linux/fs.h>
  78 #include <linux/ufs_fs.h>
  79 #include <linux/slab.h>
  80 #include <linux/time.h>
  81 #include <linux/stat.h>
  82 #include <linux/string.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/init.h>
  85 #include <linux/parser.h>
  86 #include <linux/smp_lock.h>
  87 #include <linux/buffer_head.h>
  88 #include <linux/vfs.h>
  89
  90 #include "swab.h"
  91 #include "util.h"
  92
  93 #ifdef CONFIG_UFS_DEBUG
  94 /*
  95  * Print contents of ufs_super_block, useful for debugging
  96  */
  97 static void ufs_print_super_stuff(struct super_block *sb, unsigned flags,
  98                                   struct ufs_super_block_first *usb1,
  99                                   struct ufs_super_block_second *usb2,
 100                                   struct ufs_super_block_third *usb3)
 101 {
 102         printk("ufs_print_super_stuff\n");
 103         printk("  magic:     0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
 104         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 105                 printk("  fs_size:   %llu\n", (unsigned long long)
 106                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 107                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 108                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 109                 printk("  bsize:         %u\n",
 110                        fs32_to_cpu(sb, usb1->fs_bsize));
 111                 printk("  fsize:         %u\n",
 112                        fs32_to_cpu(sb, usb1->fs_fsize));
 113                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 114                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 115                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 116                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 117                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 118                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 119                        (unsigned long long)
 120                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 121         } else {
 122                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 123                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 124                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 125                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 126                 printk(" cgoffset:    %u\n",
 127                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 128                 printk(" ~cgmask:     0x%x\n",
 129                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 130                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 131                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 132                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 133                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 134                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 135                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 136                 printk(" fragshift:   %u\n",
 137                        fs32_to_cpu(sb, usb1->fs_fragshift));
 138                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 139                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 140                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 141                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 142                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 143                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 144                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 145                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 146                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 147                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 148                 printk(" fstodb:      %u\n",
 149                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 150                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 151                 printk(" ndir         %u\n",
 152                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 153                 printk(" nifree       %u\n",
 154                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 155                 printk(" nbfree       %u\n",
 156                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 157                 printk(" nffree       %u\n",
 158                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 159         }
 160         printk("\n");
 161 }
 162
 163 /*
 164  * Print contents of ufs_cylinder_group, useful for debugging
 165  */
 166 static void ufs_print_cylinder_stuff(struct super_block *sb,
 167                                      struct ufs_cylinder_group *cg)
 168 {
 169         printk("\nufs_print_cylinder_stuff\n");
 170         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 171         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 172         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 173         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 174         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 175         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 176         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 177         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 178         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 179         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 180         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 181         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 182         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 183         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 184         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 185             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 186             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 187             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 188             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 189         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 190         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 191         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 192         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 193         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 194         printk("  clustersumoff %u\n",
 195                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 196         printk("  clusteroff    %u\n",
 197                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 198         printk("  nclusterblks  %u\n",
 199                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 200         printk("\n");
 201 }
 202 #else
 203 #  define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/
 204 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 205 #endif /* CONFIG_UFS_DEBUG */
 206
 207 static struct super_operations ufs_super_ops;
 208
 209 static char error_buf[1024];
 210
 211 void ufs_error (struct super_block * sb, const char * function,
 212         const char * fmt, ...)
 213 {
 214         struct ufs_sb_private_info * uspi;
 215         struct ufs_super_block_first * usb1;
 216         va_list args;
 217
 218         uspi = UFS_SB(sb)->s_uspi;
 219         usb1 = ubh_get_usb_first(uspi);
 220
 221         if (!(sb->s_flags & MS_RDONLY)) {
 222                 usb1->fs_clean = UFS_FSBAD;
 223                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 224                 sb->s_dirt = 1;
 225                 sb->s_flags |= MS_RDONLY;
 226         }
 227         va_start (args, fmt);
 228         vsprintf (error_buf, fmt, args);
 229         va_end (args);
 230         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 231         case UFS_MOUNT_ONERROR_PANIC:
 232                 panic ("UFS-fs panic (device %s): %s: %s\n",
 233                         sb->s_id, function, error_buf);
 234
 235         case UFS_MOUNT_ONERROR_LOCK:
 236         case UFS_MOUNT_ONERROR_UMOUNT:
 237         case UFS_MOUNT_ONERROR_REPAIR:
 238                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 239                         sb->s_id, function, error_buf);
 240         }
 241 }
 242
 243 void ufs_panic (struct super_block * sb, const char * function,
 244         const char * fmt, ...)
 245 {
 246         struct ufs_sb_private_info * uspi;
 247         struct ufs_super_block_first * usb1;
 248         va_list args;
 249
 250         uspi = UFS_SB(sb)->s_uspi;
 251         usb1 = ubh_get_usb_first(uspi);
 252
 253         if (!(sb->s_flags & MS_RDONLY)) {
 254                 usb1->fs_clean = UFS_FSBAD;
 255                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 256                 sb->s_dirt = 1;
 257         }
 258         va_start (args, fmt);
 259         vsprintf (error_buf, fmt, args);
 260         va_end (args);
 261         sb->s_flags |= MS_RDONLY;
 262         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 263                 sb->s_id, function, error_buf);
 264 }
 265
 266 void ufs_warning (struct super_block * sb, const char * function,
 267         const char * fmt, ...)
 268 {
 269         va_list args;
 270
 271         va_start (args, fmt);
 272         vsprintf (error_buf, fmt, args);
 273         va_end (args);
 274         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 275                 sb->s_id, function, error_buf);
 276 }
 277
 278 enum {
 279         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
 280         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 281         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 282         Opt_onerror_umount, Opt_onerror_repair, Opt_err
 283 };
 284
 285 static match_table_t tokens = {
 286         {Opt_type_old, "ufstype=old"},
 287         {Opt_type_sunx86, "ufstype=sunx86"},
 288         {Opt_type_sun, "ufstype=sun"},
 289         {Opt_type_44bsd, "ufstype=44bsd"},
 290         {Opt_type_ufs2, "ufstype=ufs2"},
 291         {Opt_type_ufs2, "ufstype=5xbsd"},
 292         {Opt_type_hp, "ufstype=hp"},
 293         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 294         {Opt_type_nextstep, "ufstype=nextstep"},
 295         {Opt_type_openstep, "ufstype=openstep"},
 296         {Opt_onerror_panic, "onerror=panic"},
 297         {Opt_onerror_lock, "onerror=lock"},
 298         {Opt_onerror_umount, "onerror=umount"},
 299         {Opt_onerror_repair, "onerror=repair"},
 300         {Opt_err, NULL}
 301 };
 302
 303 static int ufs_parse_options (char * options, unsigned * mount_options)
 304 {
 305         char * p;
 306
 307         UFSD("ENTER\n");
 308
 309         if (!options)
 310                 return 1;
 311
 312         while ((p = strsep(&options, ",")) != NULL) {
 313                 substring_t args[MAX_OPT_ARGS];
 314                 int token;
 315                 if (!*p)
 316                         continue;
 317
 318                 token = match_token(p, tokens, args);
 319                 switch (token) {
 320                 case Opt_type_old:
 321                         ufs_clear_opt (*mount_options, UFSTYPE);
 322                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 323                         break;
 324                 case Opt_type_sunx86:
 325                         ufs_clear_opt (*mount_options, UFSTYPE);
 326                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 327                         break;
 328                 case Opt_type_sun:
 329                         ufs_clear_opt (*mount_options, UFSTYPE);
 330                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 331                         break;
 332                 case Opt_type_44bsd:
 333                         ufs_clear_opt (*mount_options, UFSTYPE);
 334                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 335                         break;
 336                 case Opt_type_ufs2:
 337                         ufs_clear_opt(*mount_options, UFSTYPE);
 338                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 339                         break;
 340                 case Opt_type_hp:
 341                         ufs_clear_opt (*mount_options, UFSTYPE);
 342                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 343                         break;
 344                 case Opt_type_nextstepcd:
 345                         ufs_clear_opt (*mount_options, UFSTYPE);
 346                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 347                         break;
 348                 case Opt_type_nextstep:
 349                         ufs_clear_opt (*mount_options, UFSTYPE);
 350                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 351                         break;
 352                 case Opt_type_openstep:
 353                         ufs_clear_opt (*mount_options, UFSTYPE);
 354                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 355                         break;
 356                 case Opt_onerror_panic:
 357                         ufs_clear_opt (*mount_options, ONERROR);
 358                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 359                         break;
 360                 case Opt_onerror_lock:
 361                         ufs_clear_opt (*mount_options, ONERROR);
 362                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 363                         break;
 364                 case Opt_onerror_umount:
 365                         ufs_clear_opt (*mount_options, ONERROR);
 366                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 367                         break;
 368                 case Opt_onerror_repair:
 369                         printk("UFS-fs: Unable to do repair on error, "
 370                                 "will lock lock instead\n");
 371                         ufs_clear_opt (*mount_options, ONERROR);
 372                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 373                         break;
 374                 default:
 375                         printk("UFS-fs: Invalid option: \"%s\" "
 376                                         "or missing value\n", p);
 377                         return 0;
 378                 }
 379         }
 380         return 1;
 381 }
 382
 383 /*
 384  * Read on-disk structures associated with cylinder groups
 385  */
 386 static int ufs_read_cylinder_structures (struct super_block *sb)
 387 {
 388         struct ufs_sb_info *sbi = UFS_SB(sb);
 389         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 390         struct ufs_super_block_third *usb3;
 391         struct ufs_buffer_head * ubh;
 392         unsigned char * base, * space;
 393         unsigned size, blks, i;
 394         unsigned flags = 0;
 395
 396         UFSD("ENTER\n");
 397
 398         usb3 = ubh_get_usb_third(uspi);
 399
 400         flags = UFS_SB(sb)->s_flags;
 401
 402         /*
 403          * Read cs structures from (usually) first data block
 404          * on the device.
 405          */
 406         size = uspi->s_cssize;
 407         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 408         base = space = kmalloc(size, GFP_KERNEL);
 409         if (!base)
 410                 goto failed;
 411         sbi->s_csp = (struct ufs_csum *)space;
 412         for (i = 0; i < blks; i += uspi->s_fpb) {
 413                 size = uspi->s_bsize;
 414                 if (i + uspi->s_fpb > blks)
 415                         size = (blks - i) * uspi->s_fsize;
 416
 417                 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 418                         ubh = ubh_bread(sb,
 419                                 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size);
 420                 else
 421                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 422
 423                 if (!ubh)
 424                         goto failed;
 425
 426                 ubh_ubhcpymem (space, ubh, size);
 427
 428                 space += size;
 429                 ubh_brelse (ubh);
 430                 ubh = NULL;
 431         }
 432
 433         /*
 434          * Read cylinder group (we read only first fragment from block
 435          * at this time) and prepare internal data structures for cg caching.
 436          */
 437         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 438                 goto failed;
 439         for (i = 0; i < uspi->s_ncg; i++)
 440                 sbi->s_ucg[i] = NULL;
 441         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 442                 sbi->s_ucpi[i] = NULL;
 443                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 444         }
 445         for (i = 0; i < uspi->s_ncg; i++) {
 446                 UFSD("read cg %u\n", i);
 447                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 448                         goto failed;
 449                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 450                         goto failed;
 451
 452                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 453         }
 454         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 455                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 456                         goto failed;
 457                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 458         }
 459         sbi->s_cg_loaded = 0;
 460         UFSD("EXIT\n");
 461         return 1;
 462
 463 failed:
 464         kfree (base);
 465         if (sbi->s_ucg) {
 466                 for (i = 0; i < uspi->s_ncg; i++)
 467                         if (sbi->s_ucg[i])
 468                                 brelse (sbi->s_ucg[i]);
 469                 kfree (sbi->s_ucg);
 470                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 471                         kfree (sbi->s_ucpi[i]);
 472         }
 473         UFSD("EXIT (FAILED)\n");
 474         return 0;
 475 }
 476
 477 /*
 478  * Put on-disk structures associated with cylinder groups and
 479  * write them back to disk
 480  */
 481 static void ufs_put_cylinder_structures (struct super_block *sb)
 482 {
 483         struct ufs_sb_info * sbi = UFS_SB(sb);
 484         struct ufs_sb_private_info * uspi;
 485         struct ufs_buffer_head * ubh;
 486         unsigned char * base, * space;
 487         unsigned blks, size, i;
 488
 489         UFSD("ENTER\n");
 490
 491         uspi = sbi->s_uspi;
 492
 493         size = uspi->s_cssize;
 494         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 495         base = space = (char*) sbi->s_csp;
 496         for (i = 0; i < blks; i += uspi->s_fpb) {
 497                 size = uspi->s_bsize;
 498                 if (i + uspi->s_fpb > blks)
 499                         size = (blks - i) * uspi->s_fsize;
 500                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 501                 ubh_memcpyubh (ubh, space, size);
 502                 space += size;
 503                 ubh_mark_buffer_uptodate (ubh, 1);
 504                 ubh_mark_buffer_dirty (ubh);
 505                 ubh_brelse (ubh);
 506         }
 507         for (i = 0; i < sbi->s_cg_loaded; i++) {
 508                 ufs_put_cylinder (sb, i);
 509                 kfree (sbi->s_ucpi[i]);
 510         }
 511         for (; i < UFS_MAX_GROUP_LOADED; i++)
 512                 kfree (sbi->s_ucpi[i]);
 513         for (i = 0; i < uspi->s_ncg; i++)
 514                 brelse (sbi->s_ucg[i]);
 515         kfree (sbi->s_ucg);
 516         kfree (base);
 517         UFSD("EXIT\n");
 518 }
 519
 520 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 521 {
 522         struct ufs_sb_info * sbi;
 523         struct ufs_sb_private_info * uspi;
 524         struct ufs_super_block_first * usb1;
 525         struct ufs_super_block_second * usb2;
 526         struct ufs_super_block_third * usb3;
 527         struct ufs_super_block *usb;
 528         struct ufs_buffer_head * ubh;
 529         struct inode *inode;
 530         unsigned block_size, super_block_size;
 531         unsigned flags;
 532         unsigned super_block_offset;
 533
 534         uspi = NULL;
 535         ubh = NULL;
 536         flags = 0;
 537
 538         UFSD("ENTER\n");
 539
 540         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 541         if (!sbi)
 542                 goto failed_nomem;
 543         sb->s_fs_info = sbi;
 544         memset(sbi, 0, sizeof(struct ufs_sb_info));
 545
 546         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 547
 548 #ifndef CONFIG_UFS_FS_WRITE
 549         if (!(sb->s_flags & MS_RDONLY)) {
 550                 printk("ufs was compiled with read-only support, "
 551                 "can't be mounted as read-write\n");
 552                 goto failed;
 553         }
 554 #endif
 555         /*
 556          * Set default mount options
 557          * Parse mount options
 558          */
 559         sbi->s_mount_opt = 0;
 560         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 561         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 562                 printk("wrong mount options\n");
 563                 goto failed;
 564         }
 565         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 566                 if (!silent)
 567                         printk("You didn't specify the type of your ufs filesystem\n\n"
 568                         "mount -t ufs -o ufstype="
 569                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 570                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 571                         "default is ufstype=old\n");
 572                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 573         }
 574
 575         sbi->s_uspi = uspi =
 576                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 577         if (!uspi)
 578                 goto failed;
 579
 580         super_block_offset=UFS_SBLOCK;
 581
 582         /* Keep 2Gig file limit. Some UFS variants need to override
 583            this but as I don't know which I'll let those in the know loosen
 584            the rules */
 585         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 586         case UFS_MOUNT_UFSTYPE_44BSD:
 587                 UFSD("ufstype=44bsd\n");
 588                 uspi->s_fsize = block_size = 512;
 589                 uspi->s_fmask = ~(512 - 1);
 590                 uspi->s_fshift = 9;
 591                 uspi->s_sbsize = super_block_size = 1536;
 592                 uspi->s_sbbase = 0;
 593                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 594                 break;
 595         case UFS_MOUNT_UFSTYPE_UFS2:
 596                 UFSD("ufstype=ufs2\n");
 597                 super_block_offset=SBLOCK_UFS2;
 598                 uspi->s_fsize = block_size = 512;
 599                 uspi->s_fmask = ~(512 - 1);
 600                 uspi->s_fshift = 9;
 601                 uspi->s_sbsize = super_block_size = 1536;
 602                 uspi->s_sbbase =  0;
 603                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 604                 if (!(sb->s_flags & MS_RDONLY)) {
 605                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
 606                         sb->s_flags |= MS_RDONLY;
 607                 }
 608                 break;
 609
 610         case UFS_MOUNT_UFSTYPE_SUN:
 611                 UFSD("ufstype=sun\n");
 612                 uspi->s_fsize = block_size = 1024;
 613                 uspi->s_fmask = ~(1024 - 1);
 614                 uspi->s_fshift = 10;
 615                 uspi->s_sbsize = super_block_size = 2048;
 616                 uspi->s_sbbase = 0;
 617                 uspi->s_maxsymlinklen = 56;
 618                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 619                 break;
 620
 621         case UFS_MOUNT_UFSTYPE_SUNx86:
 622                 UFSD("ufstype=sunx86\n");
 623                 uspi->s_fsize = block_size = 1024;
 624                 uspi->s_fmask = ~(1024 - 1);
 625                 uspi->s_fshift = 10;
 626                 uspi->s_sbsize = super_block_size = 2048;
 627                 uspi->s_sbbase = 0;
 628                 uspi->s_maxsymlinklen = 56;
 629                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 630                 break;
 631
 632         case UFS_MOUNT_UFSTYPE_OLD:
 633                 UFSD("ufstype=old\n");
 634                 uspi->s_fsize = block_size = 1024;
 635                 uspi->s_fmask = ~(1024 - 1);
 636                 uspi->s_fshift = 10;
 637                 uspi->s_sbsize = super_block_size = 2048;
 638                 uspi->s_sbbase = 0;
 639                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 640                 if (!(sb->s_flags & MS_RDONLY)) {
 641                         if (!silent)
 642                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 643                         sb->s_flags |= MS_RDONLY;
 644                 }
 645                 break;
 646
 647         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 648                 UFSD("ufstype=nextstep\n");
 649                 uspi->s_fsize = block_size = 1024;
 650                 uspi->s_fmask = ~(1024 - 1);
 651                 uspi->s_fshift = 10;
 652                 uspi->s_sbsize = super_block_size = 2048;
 653                 uspi->s_sbbase = 0;
 654                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 655                 if (!(sb->s_flags & MS_RDONLY)) {
 656                         if (!silent)
 657                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 658                         sb->s_flags |= MS_RDONLY;
 659                 }
 660                 break;
 661
 662         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 663                 UFSD("ufstype=nextstep-cd\n");
 664                 uspi->s_fsize = block_size = 2048;
 665                 uspi->s_fmask = ~(2048 - 1);
 666                 uspi->s_fshift = 11;
 667                 uspi->s_sbsize = super_block_size = 2048;
 668                 uspi->s_sbbase = 0;
 669                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 670                 if (!(sb->s_flags & MS_RDONLY)) {
 671                         if (!silent)
 672                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 673                         sb->s_flags |= MS_RDONLY;
 674                 }
 675                 break;
 676
 677         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 678                 UFSD("ufstype=openstep\n");
 679                 uspi->s_fsize = block_size = 1024;
 680                 uspi->s_fmask = ~(1024 - 1);
 681                 uspi->s_fshift = 10;
 682                 uspi->s_sbsize = super_block_size = 2048;
 683                 uspi->s_sbbase = 0;
 684                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 685                 if (!(sb->s_flags & MS_RDONLY)) {
 686                         if (!silent)
 687                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 688                         sb->s_flags |= MS_RDONLY;
 689                 }
 690                 break;
 691
 692         case UFS_MOUNT_UFSTYPE_HP:
 693                 UFSD("ufstype=hp\n");
 694                 uspi->s_fsize = block_size = 1024;
 695                 uspi->s_fmask = ~(1024 - 1);
 696                 uspi->s_fshift = 10;
 697                 uspi->s_sbsize = super_block_size = 2048;
 698                 uspi->s_sbbase = 0;
 699                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 700                 if (!(sb->s_flags & MS_RDONLY)) {
 701                         if (!silent)
 702                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 703                         sb->s_flags |= MS_RDONLY;
 704                 }
 705                 break;
 706         default:
 707                 if (!silent)
 708                         printk("unknown ufstype\n");
 709                 goto failed;
 710         }
 711
 712 again:
 713         if (!sb_set_blocksize(sb, block_size)) {
 714                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 715                 goto failed;
 716         }
 717
 718         /*
 719          * read ufs super block from device
 720          */
 721
 722         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 723
 724         if (!ubh)
 725             goto failed;
 726
 727
 728         usb1 = ubh_get_usb_first(uspi);
 729         usb2 = ubh_get_usb_second(uspi);
 730         usb3 = ubh_get_usb_third(uspi);
 731         usb  = (struct ufs_super_block *)
 732                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
 733
 734         /*
 735          * Check ufs magic number
 736          */
 737         sbi->s_bytesex = BYTESEX_LE;
 738         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 739                 case UFS_MAGIC:
 740                 case UFS2_MAGIC:
 741                 case UFS_MAGIC_LFN:
 742                 case UFS_MAGIC_FEA:
 743                 case UFS_MAGIC_4GB:
 744                         goto magic_found;
 745         }
 746         sbi->s_bytesex = BYTESEX_BE;
 747         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 748                 case UFS_MAGIC:
 749                 case UFS2_MAGIC:
 750                 case UFS_MAGIC_LFN:
 751                 case UFS_MAGIC_FEA:
 752                 case UFS_MAGIC_4GB:
 753                         goto magic_found;
 754         }
 755
 756         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 757           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 758           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 759           && uspi->s_sbbase < 256) {
 760                 ubh_brelse_uspi(uspi);
 761                 ubh = NULL;
 762                 uspi->s_sbbase += 8;
 763                 goto again;
 764         }
 765         if (!silent)
 766                 printk("ufs_read_super: bad magic number\n");
 767         goto failed;
 768
 769 magic_found:
 770         /*
 771          * Check block and fragment sizes
 772          */
 773         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 774         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 775         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 776         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 777         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 778
 779         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
 780                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 781                         uspi->s_fsize);
 782                         goto failed;
 783         }
 784         if (uspi->s_fsize < 512) {
 785                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 786                         uspi->s_fsize);
 787                 goto failed;
 788         }
 789         if (uspi->s_fsize > 4096) {
 790                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 791                         uspi->s_fsize);
 792                 goto failed;
 793         }
 794         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
 795                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 796                         uspi->s_bsize);
 797                 goto failed;
 798         }
 799         if (uspi->s_bsize < 4096) {
 800                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 801                         uspi->s_bsize);
 802                 goto failed;
 803         }
 804         if (uspi->s_bsize / uspi->s_fsize > 8) {
 805                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 806                         uspi->s_bsize / uspi->s_fsize);
 807                 goto failed;
 808         }
 809         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 810                 ubh_brelse_uspi(uspi);
 811                 ubh = NULL;
 812                 block_size = uspi->s_fsize;
 813                 super_block_size = uspi->s_sbsize;
 814                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 815                 goto again;
 816         }
 817
 818
 819         ufs_print_super_stuff(sb, flags, usb1, usb2, usb3);
 820
 821         /*
 822          * Check, if file system was correctly unmounted.
 823          * If not, make it read only.
 824          */
 825         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 826           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 827           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 828           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 829           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 830                 switch(usb1->fs_clean) {
 831                 case UFS_FSCLEAN:
 832                         UFSD("fs is clean\n");
 833                         break;
 834                 case UFS_FSSTABLE:
 835                         UFSD("fs is stable\n");
 836                         break;
 837                 case UFS_FSOSF1:
 838                         UFSD("fs is DEC OSF/1\n");
 839                         break;
 840                 case UFS_FSACTIVE:
 841                         printk("ufs_read_super: fs is active\n");
 842                         sb->s_flags |= MS_RDONLY;
 843                         break;
 844                 case UFS_FSBAD:
 845                         printk("ufs_read_super: fs is bad\n");
 846                         sb->s_flags |= MS_RDONLY;
 847                         break;
 848                 default:
 849                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 850                         sb->s_flags |= MS_RDONLY;
 851                         break;
 852                 }
 853         }
 854         else {
 855                 printk("ufs_read_super: fs needs fsck\n");
 856                 sb->s_flags |= MS_RDONLY;
 857         }
 858
 859         /*
 860          * Read ufs_super_block into internal data structures
 861          */
 862         sb->s_op = &ufs_super_ops;
 863         sb->dq_op = NULL; /***/
 864         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 865
 866         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 867         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 868         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 869         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 870         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 871         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 872
 873         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 874                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 875                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 876         } else {
 877                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 878                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 879         }
 880
 881         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 882         /* s_bsize already set */
 883         /* s_fsize already set */
 884         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 885         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 886         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 887         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 888         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 889         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 890         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
 891                 uspi->s_fshift);
 892         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 893         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 894         /* s_sbsize already set */
 895         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 896         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 897         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 898         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 899         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 900         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 901         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 902         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 903         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 904         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 905         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 906         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 907         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 908         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 909         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 910         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 911         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
 912         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
 913         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 914         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 915         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 916         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 917         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
 918         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
 919
 920         /*
 921          * Compute another frequently used values
 922          */
 923         uspi->s_fpbmask = uspi->s_fpb - 1;
 924         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 925                 uspi->s_apbshift = uspi->s_bshift - 3;
 926         else
 927                 uspi->s_apbshift = uspi->s_bshift - 2;
 928
 929         uspi->s_2apbshift = uspi->s_apbshift * 2;
 930         uspi->s_3apbshift = uspi->s_apbshift * 3;
 931         uspi->s_apb = 1 << uspi->s_apbshift;
 932         uspi->s_2apb = 1 << uspi->s_2apbshift;
 933         uspi->s_3apb = 1 << uspi->s_3apbshift;
 934         uspi->s_apbmask = uspi->s_apb - 1;
 935         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
 936         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
 937         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
 938         uspi->s_bpf = uspi->s_fsize << 3;
 939         uspi->s_bpfshift = uspi->s_fshift + 3;
 940         uspi->s_bpfmask = uspi->s_bpf - 1;
 941         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
 942             UFS_MOUNT_UFSTYPE_44BSD)
 943                 uspi->s_maxsymlinklen =
 944                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
 945
 946         sbi->s_flags = flags;
 947
 948         inode = iget(sb, UFS_ROOTINO);
 949         if (!inode || is_bad_inode(inode))
 950                 goto failed;
 951         sb->s_root = d_alloc_root(inode);
 952         if (!sb->s_root)
 953                 goto dalloc_failed;
 954
 955
 956         /*
 957          * Read cylinder group structures
 958          */
 959         if (!(sb->s_flags & MS_RDONLY))
 960                 if (!ufs_read_cylinder_structures(sb))
 961                         goto failed;
 962
 963         UFSD("EXIT\n");
 964         return 0;
 965
 966 dalloc_failed:
 967         iput(inode);
 968 failed:
 969         if (ubh)
 970                 ubh_brelse_uspi (uspi);
 971         kfree (uspi);
 972         kfree(sbi);
 973         sb->s_fs_info = NULL;
 974         UFSD("EXIT (FAILED)\n");
 975         return -EINVAL;
 976
 977 failed_nomem:
 978         UFSD("EXIT (NOMEM)\n");
 979         return -ENOMEM;
 980 }
 981
 982 static void ufs_write_super(struct super_block *sb)
 983 {
 984         struct ufs_sb_private_info * uspi;
 985         struct ufs_super_block_first * usb1;
 986         struct ufs_super_block_third * usb3;
 987         unsigned flags;
 988
 989         lock_kernel();
 990
 991         UFSD("ENTER\n");
 992         flags = UFS_SB(sb)->s_flags;
 993         uspi = UFS_SB(sb)->s_uspi;
 994         usb1 = ubh_get_usb_first(uspi);
 995         usb3 = ubh_get_usb_third(uspi);
 996
 997         if (!(sb->s_flags & MS_RDONLY)) {
 998                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
 999                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1000                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1001                         ufs_set_fs_state(sb, usb1, usb3,
1002                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1003                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1004         }
1005         sb->s_dirt = 0;
1006         UFSD("EXIT\n");
1007         unlock_kernel();
1008 }
1009
1010 static void ufs_put_super(struct super_block *sb)
1011 {
1012         struct ufs_sb_info * sbi = UFS_SB(sb);
1013
1014         UFSD("ENTER\n");
1015
1016         if (!(sb->s_flags & MS_RDONLY))
1017                 ufs_put_cylinder_structures (sb);
1018
1019         ubh_brelse_uspi (sbi->s_uspi);
1020         kfree (sbi->s_uspi);
1021         kfree (sbi);
1022         sb->s_fs_info = NULL;
1023         UFSD("EXIT\n");
1024         return;
1025 }
1026
1027
1028 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1029 {
1030         struct ufs_sb_private_info * uspi;
1031         struct ufs_super_block_first * usb1;
1032         struct ufs_super_block_third * usb3;
1033         unsigned new_mount_opt, ufstype;
1034         unsigned flags;
1035
1036         uspi = UFS_SB(sb)->s_uspi;
1037         flags = UFS_SB(sb)->s_flags;
1038         usb1 = ubh_get_usb_first(uspi);
1039         usb3 = ubh_get_usb_third(uspi);
1040
1041         /*
1042          * Allow the "check" option to be passed as a remount option.
1043          * It is not possible to change ufstype option during remount
1044          */
1045         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1046         new_mount_opt = 0;
1047         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1048         if (!ufs_parse_options (data, &new_mount_opt))
1049                 return -EINVAL;
1050         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1051                 new_mount_opt |= ufstype;
1052         }
1053         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1054                 printk("ufstype can't be changed during remount\n");
1055                 return -EINVAL;
1056         }
1057
1058         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1059                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1060                 return 0;
1061         }
1062
1063         /*
1064          * fs was mouted as rw, remounting ro
1065          */
1066         if (*mount_flags & MS_RDONLY) {
1067                 ufs_put_cylinder_structures(sb);
1068                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1069                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1070                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1071                         ufs_set_fs_state(sb, usb1, usb3,
1072                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1073                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1074                 sb->s_dirt = 0;
1075                 sb->s_flags |= MS_RDONLY;
1076         }
1077         /*
1078          * fs was mounted as ro, remounting rw
1079          */
1080         else {
1081 #ifndef CONFIG_UFS_FS_WRITE
1082                 printk("ufs was compiled with read-only support, "
1083                 "can't be mounted as read-write\n");
1084                 return -EINVAL;
1085 #else
1086                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1087                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1088                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1089                         printk("this ufstype is read-only supported\n");
1090                         return -EINVAL;
1091                 }
1092                 if (!ufs_read_cylinder_structures (sb)) {
1093                         printk("failed during remounting\n");
1094                         return -EPERM;
1095                 }
1096                 sb->s_flags &= ~MS_RDONLY;
1097 #endif
1098         }
1099         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1100         return 0;
1101 }
1102
1103 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1104 {
1105         struct super_block *sb = dentry->d_sb;
1106         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1107         unsigned  flags = UFS_SB(sb)->s_flags;
1108         struct ufs_super_block_first *usb1;
1109         struct ufs_super_block_second *usb2;
1110         struct ufs_super_block_third *usb3;
1111
1112         lock_kernel();
1113
1114         usb1 = ubh_get_usb_first(uspi);
1115         usb2 = ubh_get_usb_second(uspi);
1116         usb3 = ubh_get_usb_third(uspi);
1117
1118         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1119                 buf->f_type = UFS2_MAGIC;
1120                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1121                 buf->f_bfree = ufs_blkstofrags(
1122                         fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)) +
1123                         fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
1124                 buf->f_ffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
1125         } else {
1126                 buf->f_type = UFS_MAGIC;
1127                 buf->f_blocks = uspi->s_dsize;
1128                 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1129                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1130                 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1131         }
1132         buf->f_bsize = sb->s_blocksize;
1133         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1134                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1135         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1136         buf->f_namelen = UFS_MAXNAMLEN;
1137
1138         unlock_kernel();
1139
1140         return 0;
1141 }
1142
1143 static kmem_cache_t * ufs_inode_cachep;
1144
1145 static struct inode *ufs_alloc_inode(struct super_block *sb)
1146 {
1147         struct ufs_inode_info *ei;
1148         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1149         if (!ei)
1150                 return NULL;
1151         ei->vfs_inode.i_version = 1;
1152         return &ei->vfs_inode;
1153 }
1154
1155 static void ufs_destroy_inode(struct inode *inode)
1156 {
1157         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1158 }
1159
1160 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1161 {
1162         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1163
1164         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1165             SLAB_CTOR_CONSTRUCTOR)
1166                 inode_init_once(&ei->vfs_inode);
1167 }
1168
1169 static int init_inodecache(void)
1170 {
1171         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1172                                              sizeof(struct ufs_inode_info),
1173                                              0, (SLAB_RECLAIM_ACCOUNT|
1174                                                 SLAB_MEM_SPREAD),
1175                                              init_once, NULL);
1176         if (ufs_inode_cachep == NULL)
1177                 return -ENOMEM;
1178         return 0;
1179 }
1180
1181 static void destroy_inodecache(void)
1182 {
1183         if (kmem_cache_destroy(ufs_inode_cachep))
1184                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1185 }
1186
1187 #ifdef CONFIG_QUOTA
1188 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1189 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1190 #endif
1191
1192 static struct super_operations ufs_super_ops = {
1193         .alloc_inode    = ufs_alloc_inode,
1194         .destroy_inode  = ufs_destroy_inode,
1195         .read_inode     = ufs_read_inode,
1196         .write_inode    = ufs_write_inode,
1197         .delete_inode   = ufs_delete_inode,
1198         .put_super      = ufs_put_super,
1199         .write_super    = ufs_write_super,
1200         .statfs         = ufs_statfs,
1201         .remount_fs     = ufs_remount,
1202 #ifdef CONFIG_QUOTA
1203         .quota_read     = ufs_quota_read,
1204         .quota_write    = ufs_quota_write,
1205 #endif
1206 };
1207
1208 #ifdef CONFIG_QUOTA
1209
1210 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1211  * acquiring the locks... As quota files are never truncated and quota code
1212  * itself serializes the operations (and noone else should touch the files)
1213  * we don't have to be afraid of races */
1214 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1215                                size_t len, loff_t off)
1216 {
1217         struct inode *inode = sb_dqopt(sb)->files[type];
1218         sector_t blk = off >> sb->s_blocksize_bits;
1219         int err = 0;
1220         int offset = off & (sb->s_blocksize - 1);
1221         int tocopy;
1222         size_t toread;
1223         struct buffer_head *bh;
1224         loff_t i_size = i_size_read(inode);
1225
1226         if (off > i_size)
1227                 return 0;
1228         if (off+len > i_size)
1229                 len = i_size-off;
1230         toread = len;
1231         while (toread > 0) {
1232                 tocopy = sb->s_blocksize - offset < toread ?
1233                                 sb->s_blocksize - offset : toread;
1234
1235                 bh = ufs_bread(inode, blk, 0, &err);
1236                 if (err)
1237                         return err;
1238                 if (!bh)        /* A hole? */
1239                         memset(data, 0, tocopy);
1240                 else {
1241                         memcpy(data, bh->b_data+offset, tocopy);
1242                         brelse(bh);
1243                 }
1244                 offset = 0;
1245                 toread -= tocopy;
1246                 data += tocopy;
1247                 blk++;
1248         }
1249         return len;
1250 }
1251
1252 /* Write to quotafile */
1253 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1254                                 const char *data, size_t len, loff_t off)
1255 {
1256         struct inode *inode = sb_dqopt(sb)->files[type];
1257         sector_t blk = off >> sb->s_blocksize_bits;
1258         int err = 0;
1259         int offset = off & (sb->s_blocksize - 1);
1260         int tocopy;
1261         size_t towrite = len;
1262         struct buffer_head *bh;
1263
1264         mutex_lock(&inode->i_mutex);
1265         while (towrite > 0) {
1266                 tocopy = sb->s_blocksize - offset < towrite ?
1267                                 sb->s_blocksize - offset : towrite;
1268
1269                 bh = ufs_bread(inode, blk, 1, &err);
1270                 if (!bh)
1271                         goto out;
1272                 lock_buffer(bh);
1273                 memcpy(bh->b_data+offset, data, tocopy);
1274                 flush_dcache_page(bh->b_page);
1275                 set_buffer_uptodate(bh);
1276                 mark_buffer_dirty(bh);
1277                 unlock_buffer(bh);
1278                 brelse(bh);
1279                 offset = 0;
1280                 towrite -= tocopy;
1281                 data += tocopy;
1282                 blk++;
1283         }
1284 out:
1285         if (len == towrite) {
1286                 mutex_unlock(&inode->i_mutex);
1287                 return err;
1288         }
1289         if (inode->i_size < off+len-towrite)
1290                 i_size_write(inode, off+len-towrite);
1291         inode->i_version++;
1292         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1293         mark_inode_dirty(inode);
1294         mutex_unlock(&inode->i_mutex);
1295         return len - towrite;
1296 }
1297
1298 #endif
1299
1300 static int ufs_get_sb(struct file_system_type *fs_type,
1301         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1302 {
1303         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1304 }
1305
1306 static struct file_system_type ufs_fs_type = {
1307         .owner          = THIS_MODULE,
1308         .name           = "ufs",
1309         .get_sb         = ufs_get_sb,
1310         .kill_sb        = kill_block_super,
1311         .fs_flags       = FS_REQUIRES_DEV,
1312 };
1313
1314 static int __init init_ufs_fs(void)
1315 {
1316         int err = init_inodecache();
1317         if (err)
1318                 goto out1;
1319         err = register_filesystem(&ufs_fs_type);
1320         if (err)
1321                 goto out;
1322         return 0;
1323 out:
1324         destroy_inodecache();
1325 out1:
1326         return err;
1327 }
1328
1329 static void __exit exit_ufs_fs(void)
1330 {
1331         unregister_filesystem(&ufs_fs_type);
1332         destroy_inodecache();
1333 }
1334
1335 module_init(init_ufs_fs)
1336 module_exit(exit_ufs_fs)
1337 MODULE_LICENSE("GPL");