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