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  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68
  69 #include <linux/module.h>
  70 #include <linux/bitops.h>
  71
  72 #include <stdarg.h>
  73
  74 #include <asm/uaccess.h>
  75 #include <asm/system.h>
  76
  77 #include <linux/errno.h>
  78 #include <linux/fs.h>
  79 #include <linux/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 #include <linux/log2.h>
  90 #include <linux/mount.h>
  91 #include <linux/seq_file.h>
  92
  93 #include "ufs_fs.h"
  94 #include "ufs.h"
  95 #include "swab.h"
  96 #include "util.h"
  97
  98 #ifdef CONFIG_UFS_DEBUG
  99 /*
 100  * Print contents of ufs_super_block, useful for debugging
 101  */
 102 static void ufs_print_super_stuff(struct super_block *sb,
 103                                   struct ufs_super_block_first *usb1,
 104                                   struct ufs_super_block_second *usb2,
 105                                   struct ufs_super_block_third *usb3)
 106 {
 107         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 108
 109         printk("ufs_print_super_stuff\n");
 110         printk("  magic:     0x%x\n", magic);
 111         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 112                 printk("  fs_size:   %llu\n", (unsigned long long)
 113                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 114                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 115                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 116                 printk("  bsize:         %u\n",
 117                        fs32_to_cpu(sb, usb1->fs_bsize));
 118                 printk("  fsize:         %u\n",
 119                        fs32_to_cpu(sb, usb1->fs_fsize));
 120                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 121                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 122                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 123                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 124                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 125                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 126                        (unsigned long long)
 127                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 128                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 129                        (unsigned long long)
 130                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 131                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 132                        (unsigned long long)
 133                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 134                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 135                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 136         } else {
 137                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 138                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 139                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 140                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 141                 printk(" cgoffset:    %u\n",
 142                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 143                 printk(" ~cgmask:     0x%x\n",
 144                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 145                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 146                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 147                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 148                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 149                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 150                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 151                 printk(" fragshift:   %u\n",
 152                        fs32_to_cpu(sb, usb1->fs_fragshift));
 153                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 154                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 155                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 156                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 157                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 158                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 159                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 160                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 161                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 162                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 163                 printk(" fstodb:      %u\n",
 164                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 165                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 166                 printk(" ndir         %u\n",
 167                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 168                 printk(" nifree       %u\n",
 169                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 170                 printk(" nbfree       %u\n",
 171                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 172                 printk(" nffree       %u\n",
 173                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 174         }
 175         printk("\n");
 176 }
 177
 178 /*
 179  * Print contents of ufs_cylinder_group, useful for debugging
 180  */
 181 static void ufs_print_cylinder_stuff(struct super_block *sb,
 182                                      struct ufs_cylinder_group *cg)
 183 {
 184         printk("\nufs_print_cylinder_stuff\n");
 185         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 186         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 187         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 188         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 189         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 190         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 191         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 192         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 193         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 194         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 195         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 196         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 197         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 198         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 199         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 200             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 201             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 202             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 203             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 204         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 205         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 206         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 207         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 208         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 209         printk("  clustersumoff %u\n",
 210                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 211         printk("  clusteroff    %u\n",
 212                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 213         printk("  nclusterblks  %u\n",
 214                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 215         printk("\n");
 216 }
 217 #else
 218 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 219 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 220 #endif /* CONFIG_UFS_DEBUG */
 221
 222 static const struct super_operations ufs_super_ops;
 223
 224 static char error_buf[1024];
 225
 226 void ufs_error (struct super_block * sb, const char * function,
 227         const char * fmt, ...)
 228 {
 229         struct ufs_sb_private_info * uspi;
 230         struct ufs_super_block_first * usb1;
 231         va_list args;
 232
 233         uspi = UFS_SB(sb)->s_uspi;
 234         usb1 = ubh_get_usb_first(uspi);
 235
 236         if (!(sb->s_flags & MS_RDONLY)) {
 237                 usb1->fs_clean = UFS_FSBAD;
 238                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 239                 sb->s_dirt = 1;
 240                 sb->s_flags |= MS_RDONLY;
 241         }
 242         va_start (args, fmt);
 243         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 244         va_end (args);
 245         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 246         case UFS_MOUNT_ONERROR_PANIC:
 247                 panic ("UFS-fs panic (device %s): %s: %s\n",
 248                         sb->s_id, function, error_buf);
 249
 250         case UFS_MOUNT_ONERROR_LOCK:
 251         case UFS_MOUNT_ONERROR_UMOUNT:
 252         case UFS_MOUNT_ONERROR_REPAIR:
 253                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 254                         sb->s_id, function, error_buf);
 255         }
 256 }
 257
 258 void ufs_panic (struct super_block * sb, const char * function,
 259         const char * fmt, ...)
 260 {
 261         struct ufs_sb_private_info * uspi;
 262         struct ufs_super_block_first * usb1;
 263         va_list args;
 264
 265         uspi = UFS_SB(sb)->s_uspi;
 266         usb1 = ubh_get_usb_first(uspi);
 267
 268         if (!(sb->s_flags & MS_RDONLY)) {
 269                 usb1->fs_clean = UFS_FSBAD;
 270                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 271                 sb->s_dirt = 1;
 272         }
 273         va_start (args, fmt);
 274         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 275         va_end (args);
 276         sb->s_flags |= MS_RDONLY;
 277         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 278                 sb->s_id, function, error_buf);
 279 }
 280
 281 void ufs_warning (struct super_block * sb, const char * function,
 282         const char * fmt, ...)
 283 {
 284         va_list args;
 285
 286         va_start (args, fmt);
 287         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 288         va_end (args);
 289         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 290                 sb->s_id, function, error_buf);
 291 }
 292
 293 enum {
 294        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 295        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 296        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 297        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 298        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 299        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 300        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 301        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 302        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 303        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 304        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 305        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 306        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 307        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 308        Opt_err
 309 };
 310
 311 static match_table_t tokens = {
 312         {Opt_type_old, "ufstype=old"},
 313         {Opt_type_sunx86, "ufstype=sunx86"},
 314         {Opt_type_sun, "ufstype=sun"},
 315         {Opt_type_sunos, "ufstype=sunos"},
 316         {Opt_type_44bsd, "ufstype=44bsd"},
 317         {Opt_type_ufs2, "ufstype=ufs2"},
 318         {Opt_type_ufs2, "ufstype=5xbsd"},
 319         {Opt_type_hp, "ufstype=hp"},
 320         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 321         {Opt_type_nextstep, "ufstype=nextstep"},
 322         {Opt_type_openstep, "ufstype=openstep"},
 323 /*end of possible ufs types */
 324         {Opt_onerror_panic, "onerror=panic"},
 325         {Opt_onerror_lock, "onerror=lock"},
 326         {Opt_onerror_umount, "onerror=umount"},
 327         {Opt_onerror_repair, "onerror=repair"},
 328         {Opt_err, NULL}
 329 };
 330
 331 static int ufs_parse_options (char * options, unsigned * mount_options)
 332 {
 333         char * p;
 334
 335         UFSD("ENTER\n");
 336
 337         if (!options)
 338                 return 1;
 339
 340         while ((p = strsep(&options, ",")) != NULL) {
 341                 substring_t args[MAX_OPT_ARGS];
 342                 int token;
 343                 if (!*p)
 344                         continue;
 345
 346                 token = match_token(p, tokens, args);
 347                 switch (token) {
 348                 case Opt_type_old:
 349                         ufs_clear_opt (*mount_options, UFSTYPE);
 350                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 351                         break;
 352                 case Opt_type_sunx86:
 353                         ufs_clear_opt (*mount_options, UFSTYPE);
 354                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 355                         break;
 356                 case Opt_type_sun:
 357                         ufs_clear_opt (*mount_options, UFSTYPE);
 358                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 359                         break;
 360                 case Opt_type_sunos:
 361                         ufs_clear_opt(*mount_options, UFSTYPE);
 362                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 363                         break;
 364                 case Opt_type_44bsd:
 365                         ufs_clear_opt (*mount_options, UFSTYPE);
 366                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 367                         break;
 368                 case Opt_type_ufs2:
 369                         ufs_clear_opt(*mount_options, UFSTYPE);
 370                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 371                         break;
 372                 case Opt_type_hp:
 373                         ufs_clear_opt (*mount_options, UFSTYPE);
 374                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 375                         break;
 376                 case Opt_type_nextstepcd:
 377                         ufs_clear_opt (*mount_options, UFSTYPE);
 378                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 379                         break;
 380                 case Opt_type_nextstep:
 381                         ufs_clear_opt (*mount_options, UFSTYPE);
 382                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 383                         break;
 384                 case Opt_type_openstep:
 385                         ufs_clear_opt (*mount_options, UFSTYPE);
 386                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 387                         break;
 388                 case Opt_onerror_panic:
 389                         ufs_clear_opt (*mount_options, ONERROR);
 390                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 391                         break;
 392                 case Opt_onerror_lock:
 393                         ufs_clear_opt (*mount_options, ONERROR);
 394                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 395                         break;
 396                 case Opt_onerror_umount:
 397                         ufs_clear_opt (*mount_options, ONERROR);
 398                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 399                         break;
 400                 case Opt_onerror_repair:
 401                         printk("UFS-fs: Unable to do repair on error, "
 402                                 "will lock lock instead\n");
 403                         ufs_clear_opt (*mount_options, ONERROR);
 404                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 405                         break;
 406                 default:
 407                         printk("UFS-fs: Invalid option: \"%s\" "
 408                                         "or missing value\n", p);
 409                         return 0;
 410                 }
 411         }
 412         return 1;
 413 }
 414
 415 /*
 416  * Diffrent types of UFS hold fs_cstotal in different
 417  * places, and use diffrent data structure for it.
 418  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 419  */
 420 static void ufs_setup_cstotal(struct super_block *sb)
 421 {
 422         struct ufs_sb_info *sbi = UFS_SB(sb);
 423         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 424         struct ufs_super_block_first *usb1;
 425         struct ufs_super_block_second *usb2;
 426         struct ufs_super_block_third *usb3;
 427         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 428
 429         UFSD("ENTER, mtype=%u\n", mtype);
 430         usb1 = ubh_get_usb_first(uspi);
 431         usb2 = ubh_get_usb_second(uspi);
 432         usb3 = ubh_get_usb_third(uspi);
 433
 434         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 435              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 436             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 437                 /*we have statistic in different place, then usual*/
 438                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 439                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 440                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 441                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 442         } else {
 443                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 444                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 445                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 446                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 447         }
 448         UFSD("EXIT\n");
 449 }
 450
 451 /*
 452  * Read on-disk structures associated with cylinder groups
 453  */
 454 static int ufs_read_cylinder_structures(struct super_block *sb)
 455 {
 456         struct ufs_sb_info *sbi = UFS_SB(sb);
 457         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 458         struct ufs_buffer_head * ubh;
 459         unsigned char * base, * space;
 460         unsigned size, blks, i;
 461         struct ufs_super_block_third *usb3;
 462
 463         UFSD("ENTER\n");
 464
 465         usb3 = ubh_get_usb_third(uspi);
 466         /*
 467          * Read cs structures from (usually) first data block
 468          * on the device.
 469          */
 470         size = uspi->s_cssize;
 471         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 472         base = space = kmalloc(size, GFP_KERNEL);
 473         if (!base)
 474                 goto failed;
 475         sbi->s_csp = (struct ufs_csum *)space;
 476         for (i = 0; i < blks; i += uspi->s_fpb) {
 477                 size = uspi->s_bsize;
 478                 if (i + uspi->s_fpb > blks)
 479                         size = (blks - i) * uspi->s_fsize;
 480
 481                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 482
 483                 if (!ubh)
 484                         goto failed;
 485
 486                 ubh_ubhcpymem (space, ubh, size);
 487
 488                 space += size;
 489                 ubh_brelse (ubh);
 490                 ubh = NULL;
 491         }
 492
 493         /*
 494          * Read cylinder group (we read only first fragment from block
 495          * at this time) and prepare internal data structures for cg caching.
 496          */
 497         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 498                 goto failed;
 499         for (i = 0; i < uspi->s_ncg; i++)
 500                 sbi->s_ucg[i] = NULL;
 501         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 502                 sbi->s_ucpi[i] = NULL;
 503                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 504         }
 505         for (i = 0; i < uspi->s_ncg; i++) {
 506                 UFSD("read cg %u\n", i);
 507                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 508                         goto failed;
 509                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 510                         goto failed;
 511
 512                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 513         }
 514         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 515                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 516                         goto failed;
 517                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 518         }
 519         sbi->s_cg_loaded = 0;
 520         UFSD("EXIT\n");
 521         return 1;
 522
 523 failed:
 524         kfree (base);
 525         if (sbi->s_ucg) {
 526                 for (i = 0; i < uspi->s_ncg; i++)
 527                         if (sbi->s_ucg[i])
 528                                 brelse (sbi->s_ucg[i]);
 529                 kfree (sbi->s_ucg);
 530                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 531                         kfree (sbi->s_ucpi[i]);
 532         }
 533         UFSD("EXIT (FAILED)\n");
 534         return 0;
 535 }
 536
 537 /*
 538  * Sync our internal copy of fs_cstotal with disk
 539  */
 540 static void ufs_put_cstotal(struct super_block *sb)
 541 {
 542         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 543         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 544         struct ufs_super_block_first *usb1;
 545         struct ufs_super_block_second *usb2;
 546         struct ufs_super_block_third *usb3;
 547
 548         UFSD("ENTER\n");
 549         usb1 = ubh_get_usb_first(uspi);
 550         usb2 = ubh_get_usb_second(uspi);
 551         usb3 = ubh_get_usb_third(uspi);
 552
 553         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 554              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 555             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 556                 /*we have statistic in different place, then usual*/
 557                 usb2->fs_un.fs_u2.cs_ndir =
 558                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 559                 usb2->fs_un.fs_u2.cs_nbfree =
 560                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 561                 usb3->fs_un1.fs_u2.cs_nifree =
 562                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 563                 usb3->fs_un1.fs_u2.cs_nffree =
 564                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 565         } else {
 566                 usb1->fs_cstotal.cs_ndir =
 567                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 568                 usb1->fs_cstotal.cs_nbfree =
 569                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 570                 usb1->fs_cstotal.cs_nifree =
 571                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 572                 usb1->fs_cstotal.cs_nffree =
 573                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 574         }
 575         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 576         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 577         UFSD("EXIT\n");
 578 }
 579
 580 /**
 581  * ufs_put_super_internal() - put on-disk intrenal structures
 582  * @sb: pointer to super_block structure
 583  * Put on-disk structures associated with cylinder groups
 584  * and write them back to disk, also update cs_total on disk
 585  */
 586 static void ufs_put_super_internal(struct super_block *sb)
 587 {
 588         struct ufs_sb_info *sbi = UFS_SB(sb);
 589         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 590         struct ufs_buffer_head * ubh;
 591         unsigned char * base, * space;
 592         unsigned blks, size, i;
 593
 594
 595         UFSD("ENTER\n");
 596         ufs_put_cstotal(sb);
 597         size = uspi->s_cssize;
 598         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 599         base = space = (char*) sbi->s_csp;
 600         for (i = 0; i < blks; i += uspi->s_fpb) {
 601                 size = uspi->s_bsize;
 602                 if (i + uspi->s_fpb > blks)
 603                         size = (blks - i) * uspi->s_fsize;
 604
 605                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 606
 607                 ubh_memcpyubh (ubh, space, size);
 608                 space += size;
 609                 ubh_mark_buffer_uptodate (ubh, 1);
 610                 ubh_mark_buffer_dirty (ubh);
 611                 ubh_brelse (ubh);
 612         }
 613         for (i = 0; i < sbi->s_cg_loaded; i++) {
 614                 ufs_put_cylinder (sb, i);
 615                 kfree (sbi->s_ucpi[i]);
 616         }
 617         for (; i < UFS_MAX_GROUP_LOADED; i++)
 618                 kfree (sbi->s_ucpi[i]);
 619         for (i = 0; i < uspi->s_ncg; i++)
 620                 brelse (sbi->s_ucg[i]);
 621         kfree (sbi->s_ucg);
 622         kfree (base);
 623         UFSD("EXIT\n");
 624 }
 625
 626 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 627 {
 628         struct ufs_sb_info * sbi;
 629         struct ufs_sb_private_info * uspi;
 630         struct ufs_super_block_first * usb1;
 631         struct ufs_super_block_second * usb2;
 632         struct ufs_super_block_third * usb3;
 633         struct ufs_buffer_head * ubh;
 634         struct inode *inode;
 635         unsigned block_size, super_block_size;
 636         unsigned flags;
 637         unsigned super_block_offset;
 638         int ret = -EINVAL;
 639
 640         uspi = NULL;
 641         ubh = NULL;
 642         flags = 0;
 643
 644         UFSD("ENTER\n");
 645
 646         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 647         if (!sbi)
 648                 goto failed_nomem;
 649         sb->s_fs_info = sbi;
 650
 651         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 652
 653 #ifndef CONFIG_UFS_FS_WRITE
 654         if (!(sb->s_flags & MS_RDONLY)) {
 655                 printk("ufs was compiled with read-only support, "
 656                 "can't be mounted as read-write\n");
 657                 goto failed;
 658         }
 659 #endif
 660         /*
 661          * Set default mount options
 662          * Parse mount options
 663          */
 664         sbi->s_mount_opt = 0;
 665         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 666         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 667                 printk("wrong mount options\n");
 668                 goto failed;
 669         }
 670         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 671                 if (!silent)
 672                         printk("You didn't specify the type of your ufs filesystem\n\n"
 673                         "mount -t ufs -o ufstype="
 674                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 675                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 676                         "default is ufstype=old\n");
 677                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 678         }
 679
 680         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 681         sbi->s_uspi = uspi;
 682         if (!uspi)
 683                 goto failed;
 684         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 685         super_block_offset=UFS_SBLOCK;
 686
 687         /* Keep 2Gig file limit. Some UFS variants need to override
 688            this but as I don't know which I'll let those in the know loosen
 689            the rules */
 690         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 691         case UFS_MOUNT_UFSTYPE_44BSD:
 692                 UFSD("ufstype=44bsd\n");
 693                 uspi->s_fsize = block_size = 512;
 694                 uspi->s_fmask = ~(512 - 1);
 695                 uspi->s_fshift = 9;
 696                 uspi->s_sbsize = super_block_size = 1536;
 697                 uspi->s_sbbase = 0;
 698                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 699                 break;
 700         case UFS_MOUNT_UFSTYPE_UFS2:
 701                 UFSD("ufstype=ufs2\n");
 702                 super_block_offset=SBLOCK_UFS2;
 703                 uspi->s_fsize = block_size = 512;
 704                 uspi->s_fmask = ~(512 - 1);
 705                 uspi->s_fshift = 9;
 706                 uspi->s_sbsize = super_block_size = 1536;
 707                 uspi->s_sbbase =  0;
 708                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 709                 break;
 710
 711         case UFS_MOUNT_UFSTYPE_SUN:
 712                 UFSD("ufstype=sun\n");
 713                 uspi->s_fsize = block_size = 1024;
 714                 uspi->s_fmask = ~(1024 - 1);
 715                 uspi->s_fshift = 10;
 716                 uspi->s_sbsize = super_block_size = 2048;
 717                 uspi->s_sbbase = 0;
 718                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 719                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 720                 break;
 721
 722         case UFS_MOUNT_UFSTYPE_SUNOS:
 723                 UFSD(("ufstype=sunos\n"))
 724                 uspi->s_fsize = block_size = 1024;
 725                 uspi->s_fmask = ~(1024 - 1);
 726                 uspi->s_fshift = 10;
 727                 uspi->s_sbsize = 2048;
 728                 super_block_size = 2048;
 729                 uspi->s_sbbase = 0;
 730                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 731                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 732                 break;
 733
 734         case UFS_MOUNT_UFSTYPE_SUNx86:
 735                 UFSD("ufstype=sunx86\n");
 736                 uspi->s_fsize = block_size = 1024;
 737                 uspi->s_fmask = ~(1024 - 1);
 738                 uspi->s_fshift = 10;
 739                 uspi->s_sbsize = super_block_size = 2048;
 740                 uspi->s_sbbase = 0;
 741                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 742                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 743                 break;
 744
 745         case UFS_MOUNT_UFSTYPE_OLD:
 746                 UFSD("ufstype=old\n");
 747                 uspi->s_fsize = block_size = 1024;
 748                 uspi->s_fmask = ~(1024 - 1);
 749                 uspi->s_fshift = 10;
 750                 uspi->s_sbsize = super_block_size = 2048;
 751                 uspi->s_sbbase = 0;
 752                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 753                 if (!(sb->s_flags & MS_RDONLY)) {
 754                         if (!silent)
 755                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 756                         sb->s_flags |= MS_RDONLY;
 757                 }
 758                 break;
 759
 760         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 761                 UFSD("ufstype=nextstep\n");
 762                 uspi->s_fsize = block_size = 1024;
 763                 uspi->s_fmask = ~(1024 - 1);
 764                 uspi->s_fshift = 10;
 765                 uspi->s_sbsize = super_block_size = 2048;
 766                 uspi->s_sbbase = 0;
 767                 uspi->s_dirblksize = 1024;
 768                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 769                 if (!(sb->s_flags & MS_RDONLY)) {
 770                         if (!silent)
 771                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 772                         sb->s_flags |= MS_RDONLY;
 773                 }
 774                 break;
 775
 776         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 777                 UFSD("ufstype=nextstep-cd\n");
 778                 uspi->s_fsize = block_size = 2048;
 779                 uspi->s_fmask = ~(2048 - 1);
 780                 uspi->s_fshift = 11;
 781                 uspi->s_sbsize = super_block_size = 2048;
 782                 uspi->s_sbbase = 0;
 783                 uspi->s_dirblksize = 1024;
 784                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 785                 if (!(sb->s_flags & MS_RDONLY)) {
 786                         if (!silent)
 787                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 788                         sb->s_flags |= MS_RDONLY;
 789                 }
 790                 break;
 791
 792         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 793                 UFSD("ufstype=openstep\n");
 794                 uspi->s_fsize = block_size = 1024;
 795                 uspi->s_fmask = ~(1024 - 1);
 796                 uspi->s_fshift = 10;
 797                 uspi->s_sbsize = super_block_size = 2048;
 798                 uspi->s_sbbase = 0;
 799                 uspi->s_dirblksize = 1024;
 800                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 801                 if (!(sb->s_flags & MS_RDONLY)) {
 802                         if (!silent)
 803                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 804                         sb->s_flags |= MS_RDONLY;
 805                 }
 806                 break;
 807
 808         case UFS_MOUNT_UFSTYPE_HP:
 809                 UFSD("ufstype=hp\n");
 810                 uspi->s_fsize = block_size = 1024;
 811                 uspi->s_fmask = ~(1024 - 1);
 812                 uspi->s_fshift = 10;
 813                 uspi->s_sbsize = super_block_size = 2048;
 814                 uspi->s_sbbase = 0;
 815                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 816                 if (!(sb->s_flags & MS_RDONLY)) {
 817                         if (!silent)
 818                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 819                         sb->s_flags |= MS_RDONLY;
 820                 }
 821                 break;
 822         default:
 823                 if (!silent)
 824                         printk("unknown ufstype\n");
 825                 goto failed;
 826         }
 827
 828 again:
 829         if (!sb_set_blocksize(sb, block_size)) {
 830                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 831                 goto failed;
 832         }
 833
 834         /*
 835          * read ufs super block from device
 836          */
 837
 838         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 839
 840         if (!ubh)
 841             goto failed;
 842
 843         usb1 = ubh_get_usb_first(uspi);
 844         usb2 = ubh_get_usb_second(uspi);
 845         usb3 = ubh_get_usb_third(uspi);
 846
 847         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 848         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 849         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 850             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 851                 flags &= ~UFS_ST_MASK;
 852                 flags |=  UFS_ST_SUN;
 853         }
 854
 855         /*
 856          * Check ufs magic number
 857          */
 858         sbi->s_bytesex = BYTESEX_LE;
 859         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 860                 case UFS_MAGIC:
 861                 case UFS2_MAGIC:
 862                 case UFS_MAGIC_LFN:
 863                 case UFS_MAGIC_FEA:
 864                 case UFS_MAGIC_4GB:
 865                         goto magic_found;
 866         }
 867         sbi->s_bytesex = BYTESEX_BE;
 868         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 869                 case UFS_MAGIC:
 870                 case UFS2_MAGIC:
 871                 case UFS_MAGIC_LFN:
 872                 case UFS_MAGIC_FEA:
 873                 case UFS_MAGIC_4GB:
 874                         goto magic_found;
 875         }
 876
 877         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 878           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 879           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 880           && uspi->s_sbbase < 256) {
 881                 ubh_brelse_uspi(uspi);
 882                 ubh = NULL;
 883                 uspi->s_sbbase += 8;
 884                 goto again;
 885         }
 886         if (!silent)
 887                 printk("ufs_read_super: bad magic number\n");
 888         goto failed;
 889
 890 magic_found:
 891         /*
 892          * Check block and fragment sizes
 893          */
 894         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 895         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 896         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 897         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 898         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 899
 900         if (!is_power_of_2(uspi->s_fsize)) {
 901                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 902                         uspi->s_fsize);
 903                         goto failed;
 904         }
 905         if (uspi->s_fsize < 512) {
 906                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 907                         uspi->s_fsize);
 908                 goto failed;
 909         }
 910         if (uspi->s_fsize > 4096) {
 911                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 912                         uspi->s_fsize);
 913                 goto failed;
 914         }
 915         if (!is_power_of_2(uspi->s_bsize)) {
 916                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 917                         uspi->s_bsize);
 918                 goto failed;
 919         }
 920         if (uspi->s_bsize < 4096) {
 921                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 922                         uspi->s_bsize);
 923                 goto failed;
 924         }
 925         if (uspi->s_bsize / uspi->s_fsize > 8) {
 926                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 927                         uspi->s_bsize / uspi->s_fsize);
 928                 goto failed;
 929         }
 930         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 931                 ubh_brelse_uspi(uspi);
 932                 ubh = NULL;
 933                 block_size = uspi->s_fsize;
 934                 super_block_size = uspi->s_sbsize;
 935                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 936                 goto again;
 937         }
 938
 939         sbi->s_flags = flags;/*after that line some functions use s_flags*/
 940         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 941
 942         /*
 943          * Check, if file system was correctly unmounted.
 944          * If not, make it read only.
 945          */
 946         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 947           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 948           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 949             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 950           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 951           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 952                 switch(usb1->fs_clean) {
 953                 case UFS_FSCLEAN:
 954                         UFSD("fs is clean\n");
 955                         break;
 956                 case UFS_FSSTABLE:
 957                         UFSD("fs is stable\n");
 958                         break;
 959                 case UFS_FSOSF1:
 960                         UFSD("fs is DEC OSF/1\n");
 961                         break;
 962                 case UFS_FSACTIVE:
 963                         printk("ufs_read_super: fs is active\n");
 964                         sb->s_flags |= MS_RDONLY;
 965                         break;
 966                 case UFS_FSBAD:
 967                         printk("ufs_read_super: fs is bad\n");
 968                         sb->s_flags |= MS_RDONLY;
 969                         break;
 970                 default:
 971                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 972                         sb->s_flags |= MS_RDONLY;
 973                         break;
 974                 }
 975         } else {
 976                 printk("ufs_read_super: fs needs fsck\n");
 977                 sb->s_flags |= MS_RDONLY;
 978         }
 979
 980         /*
 981          * Read ufs_super_block into internal data structures
 982          */
 983         sb->s_op = &ufs_super_ops;
 984         sb->dq_op = NULL; /***/
 985         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 986
 987         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 988         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 989         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 990         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 991         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 992         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 993
 994         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 995                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 996                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 997         } else {
 998                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 999                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1000         }
1001
1002         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1003         /* s_bsize already set */
1004         /* s_fsize already set */
1005         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1006         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1007         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1008         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1009         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1010         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1011         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1012                 uspi->s_fshift);
1013         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1014         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1015         /* s_sbsize already set */
1016         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1017         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1018         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1019         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1020         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1021         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1022         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1023         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1024
1025         if (uspi->fs_magic == UFS2_MAGIC)
1026                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1027         else
1028                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1029
1030         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1031         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1032         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1033         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1034         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1035         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1036         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1037         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1038         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1039         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1040         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1041         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1042         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1043         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1044
1045         /*
1046          * Compute another frequently used values
1047          */
1048         uspi->s_fpbmask = uspi->s_fpb - 1;
1049         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1050                 uspi->s_apbshift = uspi->s_bshift - 3;
1051         else
1052                 uspi->s_apbshift = uspi->s_bshift - 2;
1053
1054         uspi->s_2apbshift = uspi->s_apbshift * 2;
1055         uspi->s_3apbshift = uspi->s_apbshift * 3;
1056         uspi->s_apb = 1 << uspi->s_apbshift;
1057         uspi->s_2apb = 1 << uspi->s_2apbshift;
1058         uspi->s_3apb = 1 << uspi->s_3apbshift;
1059         uspi->s_apbmask = uspi->s_apb - 1;
1060         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1061         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1062         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1063         uspi->s_bpf = uspi->s_fsize << 3;
1064         uspi->s_bpfshift = uspi->s_fshift + 3;
1065         uspi->s_bpfmask = uspi->s_bpf - 1;
1066         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1067             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1068                 uspi->s_maxsymlinklen =
1069                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1070
1071         inode = ufs_iget(sb, UFS_ROOTINO);
1072         if (IS_ERR(inode)) {
1073                 ret = PTR_ERR(inode);
1074                 goto failed;
1075         }
1076         sb->s_root = d_alloc_root(inode);
1077         if (!sb->s_root) {
1078                 ret = -ENOMEM;
1079                 goto dalloc_failed;
1080         }
1081
1082         ufs_setup_cstotal(sb);
1083         /*
1084          * Read cylinder group structures
1085          */
1086         if (!(sb->s_flags & MS_RDONLY))
1087                 if (!ufs_read_cylinder_structures(sb))
1088                         goto failed;
1089
1090         UFSD("EXIT\n");
1091         return 0;
1092
1093 dalloc_failed:
1094         iput(inode);
1095 failed:
1096         if (ubh)
1097                 ubh_brelse_uspi (uspi);
1098         kfree (uspi);
1099         kfree(sbi);
1100         sb->s_fs_info = NULL;
1101         UFSD("EXIT (FAILED)\n");
1102         return ret;
1103
1104 failed_nomem:
1105         UFSD("EXIT (NOMEM)\n");
1106         return -ENOMEM;
1107 }
1108
1109 static void ufs_write_super(struct super_block *sb)
1110 {
1111         struct ufs_sb_private_info * uspi;
1112         struct ufs_super_block_first * usb1;
1113         struct ufs_super_block_third * usb3;
1114         unsigned flags;
1115
1116         lock_kernel();
1117         UFSD("ENTER\n");
1118         flags = UFS_SB(sb)->s_flags;
1119         uspi = UFS_SB(sb)->s_uspi;
1120         usb1 = ubh_get_usb_first(uspi);
1121         usb3 = ubh_get_usb_third(uspi);
1122
1123         if (!(sb->s_flags & MS_RDONLY)) {
1124                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1125                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1126                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1127                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1128                         ufs_set_fs_state(sb, usb1, usb3,
1129                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1130                 ufs_put_cstotal(sb);
1131         }
1132         sb->s_dirt = 0;
1133         UFSD("EXIT\n");
1134         unlock_kernel();
1135 }
1136
1137 static void ufs_put_super(struct super_block *sb)
1138 {
1139         struct ufs_sb_info * sbi = UFS_SB(sb);
1140
1141         UFSD("ENTER\n");
1142
1143         if (!(sb->s_flags & MS_RDONLY))
1144                 ufs_put_super_internal(sb);
1145
1146         ubh_brelse_uspi (sbi->s_uspi);
1147         kfree (sbi->s_uspi);
1148         kfree (sbi);
1149         sb->s_fs_info = NULL;
1150         UFSD("EXIT\n");
1151         return;
1152 }
1153
1154
1155 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1156 {
1157         struct ufs_sb_private_info * uspi;
1158         struct ufs_super_block_first * usb1;
1159         struct ufs_super_block_third * usb3;
1160         unsigned new_mount_opt, ufstype;
1161         unsigned flags;
1162
1163         uspi = UFS_SB(sb)->s_uspi;
1164         flags = UFS_SB(sb)->s_flags;
1165         usb1 = ubh_get_usb_first(uspi);
1166         usb3 = ubh_get_usb_third(uspi);
1167
1168         /*
1169          * Allow the "check" option to be passed as a remount option.
1170          * It is not possible to change ufstype option during remount
1171          */
1172         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1173         new_mount_opt = 0;
1174         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1175         if (!ufs_parse_options (data, &new_mount_opt))
1176                 return -EINVAL;
1177         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1178                 new_mount_opt |= ufstype;
1179         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1180                 printk("ufstype can't be changed during remount\n");
1181                 return -EINVAL;
1182         }
1183
1184         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1185                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1186                 return 0;
1187         }
1188
1189         /*
1190          * fs was mouted as rw, remounting ro
1191          */
1192         if (*mount_flags & MS_RDONLY) {
1193                 ufs_put_super_internal(sb);
1194                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1195                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1196                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1197                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1198                         ufs_set_fs_state(sb, usb1, usb3,
1199                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1200                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1201                 sb->s_dirt = 0;
1202                 sb->s_flags |= MS_RDONLY;
1203         } else {
1204         /*
1205          * fs was mounted as ro, remounting rw
1206          */
1207 #ifndef CONFIG_UFS_FS_WRITE
1208                 printk("ufs was compiled with read-only support, "
1209                 "can't be mounted as read-write\n");
1210                 return -EINVAL;
1211 #else
1212                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1213                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1214                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1215                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1216                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1217                         printk("this ufstype is read-only supported\n");
1218                         return -EINVAL;
1219                 }
1220                 if (!ufs_read_cylinder_structures(sb)) {
1221                         printk("failed during remounting\n");
1222                         return -EPERM;
1223                 }
1224                 sb->s_flags &= ~MS_RDONLY;
1225 #endif
1226         }
1227         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1228         return 0;
1229 }
1230
1231 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1232 {
1233         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1234         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1235         const struct match_token *tp = tokens;
1236
1237         while (tp->token != Opt_onerror_panic && tp->token != mval)
1238                 ++tp;
1239         BUG_ON(tp->token == Opt_onerror_panic);
1240         seq_printf(seq, ",%s", tp->pattern);
1241
1242         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1243         while (tp->token != Opt_err && tp->token != mval)
1244                 ++tp;
1245         BUG_ON(tp->token == Opt_err);
1246         seq_printf(seq, ",%s", tp->pattern);
1247
1248         return 0;
1249 }
1250
1251 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1252 {
1253         struct super_block *sb = dentry->d_sb;
1254         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1255         unsigned  flags = UFS_SB(sb)->s_flags;
1256         struct ufs_super_block_first *usb1;
1257         struct ufs_super_block_second *usb2;
1258         struct ufs_super_block_third *usb3;
1259
1260         lock_kernel();
1261
1262         usb1 = ubh_get_usb_first(uspi);
1263         usb2 = ubh_get_usb_second(uspi);
1264         usb3 = ubh_get_usb_third(uspi);
1265
1266         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1267                 buf->f_type = UFS2_MAGIC;
1268                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1269         } else {
1270                 buf->f_type = UFS_MAGIC;
1271                 buf->f_blocks = uspi->s_dsize;
1272         }
1273         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1274                 uspi->cs_total.cs_nffree;
1275         buf->f_ffree = uspi->cs_total.cs_nifree;
1276         buf->f_bsize = sb->s_blocksize;
1277         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1278                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1279         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1280         buf->f_namelen = UFS_MAXNAMLEN;
1281
1282         unlock_kernel();
1283
1284         return 0;
1285 }
1286
1287 static struct kmem_cache * ufs_inode_cachep;
1288
1289 static struct inode *ufs_alloc_inode(struct super_block *sb)
1290 {
1291         struct ufs_inode_info *ei;
1292         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1293         if (!ei)
1294                 return NULL;
1295         ei->vfs_inode.i_version = 1;
1296         return &ei->vfs_inode;
1297 }
1298
1299 static void ufs_destroy_inode(struct inode *inode)
1300 {
1301         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1302 }
1303
1304 static void init_once(struct kmem_cache * cachep, void *foo)
1305 {
1306         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1307
1308         inode_init_once(&ei->vfs_inode);
1309 }
1310
1311 static int init_inodecache(void)
1312 {
1313         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1314                                              sizeof(struct ufs_inode_info),
1315                                              0, (SLAB_RECLAIM_ACCOUNT|
1316                                                 SLAB_MEM_SPREAD),
1317                                              init_once);
1318         if (ufs_inode_cachep == NULL)
1319                 return -ENOMEM;
1320         return 0;
1321 }
1322
1323 static void destroy_inodecache(void)
1324 {
1325         kmem_cache_destroy(ufs_inode_cachep);
1326 }
1327
1328 #ifdef CONFIG_QUOTA
1329 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1330 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1331 #endif
1332
1333 static const struct super_operations ufs_super_ops = {
1334         .alloc_inode    = ufs_alloc_inode,
1335         .destroy_inode  = ufs_destroy_inode,
1336         .write_inode    = ufs_write_inode,
1337         .delete_inode   = ufs_delete_inode,
1338         .put_super      = ufs_put_super,
1339         .write_super    = ufs_write_super,
1340         .statfs         = ufs_statfs,
1341         .remount_fs     = ufs_remount,
1342         .show_options   = ufs_show_options,
1343 #ifdef CONFIG_QUOTA
1344         .quota_read     = ufs_quota_read,
1345         .quota_write    = ufs_quota_write,
1346 #endif
1347 };
1348
1349 #ifdef CONFIG_QUOTA
1350
1351 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1352  * acquiring the locks... As quota files are never truncated and quota code
1353  * itself serializes the operations (and noone else should touch the files)
1354  * we don't have to be afraid of races */
1355 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1356                                size_t len, loff_t off)
1357 {
1358         struct inode *inode = sb_dqopt(sb)->files[type];
1359         sector_t blk = off >> sb->s_blocksize_bits;
1360         int err = 0;
1361         int offset = off & (sb->s_blocksize - 1);
1362         int tocopy;
1363         size_t toread;
1364         struct buffer_head *bh;
1365         loff_t i_size = i_size_read(inode);
1366
1367         if (off > i_size)
1368                 return 0;
1369         if (off+len > i_size)
1370                 len = i_size-off;
1371         toread = len;
1372         while (toread > 0) {
1373                 tocopy = sb->s_blocksize - offset < toread ?
1374                                 sb->s_blocksize - offset : toread;
1375
1376                 bh = ufs_bread(inode, blk, 0, &err);
1377                 if (err)
1378                         return err;
1379                 if (!bh)        /* A hole? */
1380                         memset(data, 0, tocopy);
1381                 else {
1382                         memcpy(data, bh->b_data+offset, tocopy);
1383                         brelse(bh);
1384                 }
1385                 offset = 0;
1386                 toread -= tocopy;
1387                 data += tocopy;
1388                 blk++;
1389         }
1390         return len;
1391 }
1392
1393 /* Write to quotafile */
1394 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1395                                 const char *data, size_t len, loff_t off)
1396 {
1397         struct inode *inode = sb_dqopt(sb)->files[type];
1398         sector_t blk = off >> sb->s_blocksize_bits;
1399         int err = 0;
1400         int offset = off & (sb->s_blocksize - 1);
1401         int tocopy;
1402         size_t towrite = len;
1403         struct buffer_head *bh;
1404
1405         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1406         while (towrite > 0) {
1407                 tocopy = sb->s_blocksize - offset < towrite ?
1408                                 sb->s_blocksize - offset : towrite;
1409
1410                 bh = ufs_bread(inode, blk, 1, &err);
1411                 if (!bh)
1412                         goto out;
1413                 lock_buffer(bh);
1414                 memcpy(bh->b_data+offset, data, tocopy);
1415                 flush_dcache_page(bh->b_page);
1416                 set_buffer_uptodate(bh);
1417                 mark_buffer_dirty(bh);
1418                 unlock_buffer(bh);
1419                 brelse(bh);
1420                 offset = 0;
1421                 towrite -= tocopy;
1422                 data += tocopy;
1423                 blk++;
1424         }
1425 out:
1426         if (len == towrite) {
1427                 mutex_unlock(&inode->i_mutex);
1428                 return err;
1429         }
1430         if (inode->i_size < off+len-towrite)
1431                 i_size_write(inode, off+len-towrite);
1432         inode->i_version++;
1433         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1434         mark_inode_dirty(inode);
1435         mutex_unlock(&inode->i_mutex);
1436         return len - towrite;
1437 }
1438
1439 #endif
1440
1441 static int ufs_get_sb(struct file_system_type *fs_type,
1442         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1443 {
1444         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1445 }
1446
1447 static struct file_system_type ufs_fs_type = {
1448         .owner          = THIS_MODULE,
1449         .name           = "ufs",
1450         .get_sb         = ufs_get_sb,
1451         .kill_sb        = kill_block_super,
1452         .fs_flags       = FS_REQUIRES_DEV,
1453 };
1454
1455 static int __init init_ufs_fs(void)
1456 {
1457         int err = init_inodecache();
1458         if (err)
1459                 goto out1;
1460         err = register_filesystem(&ufs_fs_type);
1461         if (err)
1462                 goto out;
1463         return 0;
1464 out:
1465         destroy_inodecache();
1466 out1:
1467         return err;
1468 }
1469
1470 static void __exit exit_ufs_fs(void)
1471 {
1472         unregister_filesystem(&ufs_fs_type);
1473         destroy_inodecache();
1474 }
1475
1476 module_init(init_ufs_fs)
1477 module_exit(exit_ufs_fs)
1478 MODULE_LICENSE("GPL");