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 <gwingerde@gmail.com>
  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/quotaops.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_fs.h"
  95 #include "ufs.h"
  96 #include "swab.h"
  97 #include "util.h"
  98
  99 #ifdef CONFIG_UFS_DEBUG
 100 /*
 101  * Print contents of ufs_super_block, useful for debugging
 102  */
 103 static void ufs_print_super_stuff(struct super_block *sb,
 104                                   struct ufs_super_block_first *usb1,
 105                                   struct ufs_super_block_second *usb2,
 106                                   struct ufs_super_block_third *usb3)
 107 {
 108         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 109
 110         printk("ufs_print_super_stuff\n");
 111         printk("  magic:     0x%x\n", magic);
 112         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 113                 printk("  fs_size:   %llu\n", (unsigned long long)
 114                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 115                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 116                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 117                 printk("  bsize:         %u\n",
 118                        fs32_to_cpu(sb, usb1->fs_bsize));
 119                 printk("  fsize:         %u\n",
 120                        fs32_to_cpu(sb, usb1->fs_fsize));
 121                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 122                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 123                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 124                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 125                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 126                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 127                        (unsigned long long)
 128                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 129                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 130                        (unsigned long long)
 131                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 132                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 133                        (unsigned long long)
 134                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 135                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 136                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 137         } else {
 138                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 139                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 140                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 141                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 142                 printk(" cgoffset:    %u\n",
 143                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 144                 printk(" ~cgmask:     0x%x\n",
 145                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 146                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 147                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 148                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 149                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 150                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 151                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 152                 printk(" fragshift:   %u\n",
 153                        fs32_to_cpu(sb, usb1->fs_fragshift));
 154                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 155                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 156                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 157                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 158                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 159                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 160                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 161                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 162                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 163                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 164                 printk(" fstodb:      %u\n",
 165                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 166                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 167                 printk(" ndir         %u\n",
 168                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 169                 printk(" nifree       %u\n",
 170                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 171                 printk(" nbfree       %u\n",
 172                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 173                 printk(" nffree       %u\n",
 174                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 175         }
 176         printk("\n");
 177 }
 178
 179 /*
 180  * Print contents of ufs_cylinder_group, useful for debugging
 181  */
 182 static void ufs_print_cylinder_stuff(struct super_block *sb,
 183                                      struct ufs_cylinder_group *cg)
 184 {
 185         printk("\nufs_print_cylinder_stuff\n");
 186         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 187         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 188         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 189         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 190         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 191         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 192         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 193         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 194         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 195         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 196         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 197         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 198         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 199         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 200         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 201             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 202             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 203             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 204             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 205         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 206         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 207         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 208         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 209         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 210         printk("  clustersumoff %u\n",
 211                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 212         printk("  clusteroff    %u\n",
 213                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 214         printk("  nclusterblks  %u\n",
 215                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 216         printk("\n");
 217 }
 218 #else
 219 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 220 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 221 #endif /* CONFIG_UFS_DEBUG */
 222
 223 static const struct super_operations ufs_super_ops;
 224
 225 static char error_buf[1024];
 226
 227 void ufs_error (struct super_block * sb, const char * function,
 228         const char * fmt, ...)
 229 {
 230         struct ufs_sb_private_info * uspi;
 231         struct ufs_super_block_first * usb1;
 232         va_list args;
 233
 234         uspi = UFS_SB(sb)->s_uspi;
 235         usb1 = ubh_get_usb_first(uspi);
 236
 237         if (!(sb->s_flags & MS_RDONLY)) {
 238                 usb1->fs_clean = UFS_FSBAD;
 239                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 240                 sb->s_dirt = 1;
 241                 sb->s_flags |= MS_RDONLY;
 242         }
 243         va_start (args, fmt);
 244         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 245         va_end (args);
 246         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 247         case UFS_MOUNT_ONERROR_PANIC:
 248                 panic ("UFS-fs panic (device %s): %s: %s\n",
 249                         sb->s_id, function, error_buf);
 250
 251         case UFS_MOUNT_ONERROR_LOCK:
 252         case UFS_MOUNT_ONERROR_UMOUNT:
 253         case UFS_MOUNT_ONERROR_REPAIR:
 254                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 255                         sb->s_id, function, error_buf);
 256         }
 257 }
 258
 259 void ufs_panic (struct super_block * sb, const char * function,
 260         const char * fmt, ...)
 261 {
 262         struct ufs_sb_private_info * uspi;
 263         struct ufs_super_block_first * usb1;
 264         va_list args;
 265
 266         uspi = UFS_SB(sb)->s_uspi;
 267         usb1 = ubh_get_usb_first(uspi);
 268
 269         if (!(sb->s_flags & MS_RDONLY)) {
 270                 usb1->fs_clean = UFS_FSBAD;
 271                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 272                 sb->s_dirt = 1;
 273         }
 274         va_start (args, fmt);
 275         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 276         va_end (args);
 277         sb->s_flags |= MS_RDONLY;
 278         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 279                 sb->s_id, function, error_buf);
 280 }
 281
 282 void ufs_warning (struct super_block * sb, const char * function,
 283         const char * fmt, ...)
 284 {
 285         va_list args;
 286
 287         va_start (args, fmt);
 288         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 289         va_end (args);
 290         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 291                 sb->s_id, function, error_buf);
 292 }
 293
 294 enum {
 295        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 296        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 297        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 298        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 299        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 300        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 301        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 302        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 303        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 304        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 305        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 306        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 307        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 308        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 309        Opt_err
 310 };
 311
 312 static const match_table_t tokens = {
 313         {Opt_type_old, "ufstype=old"},
 314         {Opt_type_sunx86, "ufstype=sunx86"},
 315         {Opt_type_sun, "ufstype=sun"},
 316         {Opt_type_sunos, "ufstype=sunos"},
 317         {Opt_type_44bsd, "ufstype=44bsd"},
 318         {Opt_type_ufs2, "ufstype=ufs2"},
 319         {Opt_type_ufs2, "ufstype=5xbsd"},
 320         {Opt_type_hp, "ufstype=hp"},
 321         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 322         {Opt_type_nextstep, "ufstype=nextstep"},
 323         {Opt_type_openstep, "ufstype=openstep"},
 324 /*end of possible ufs types */
 325         {Opt_onerror_panic, "onerror=panic"},
 326         {Opt_onerror_lock, "onerror=lock"},
 327         {Opt_onerror_umount, "onerror=umount"},
 328         {Opt_onerror_repair, "onerror=repair"},
 329         {Opt_err, NULL}
 330 };
 331
 332 static int ufs_parse_options (char * options, unsigned * mount_options)
 333 {
 334         char * p;
 335
 336         UFSD("ENTER\n");
 337
 338         if (!options)
 339                 return 1;
 340
 341         while ((p = strsep(&options, ",")) != NULL) {
 342                 substring_t args[MAX_OPT_ARGS];
 343                 int token;
 344                 if (!*p)
 345                         continue;
 346
 347                 token = match_token(p, tokens, args);
 348                 switch (token) {
 349                 case Opt_type_old:
 350                         ufs_clear_opt (*mount_options, UFSTYPE);
 351                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 352                         break;
 353                 case Opt_type_sunx86:
 354                         ufs_clear_opt (*mount_options, UFSTYPE);
 355                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 356                         break;
 357                 case Opt_type_sun:
 358                         ufs_clear_opt (*mount_options, UFSTYPE);
 359                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 360                         break;
 361                 case Opt_type_sunos:
 362                         ufs_clear_opt(*mount_options, UFSTYPE);
 363                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 364                         break;
 365                 case Opt_type_44bsd:
 366                         ufs_clear_opt (*mount_options, UFSTYPE);
 367                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 368                         break;
 369                 case Opt_type_ufs2:
 370                         ufs_clear_opt(*mount_options, UFSTYPE);
 371                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 372                         break;
 373                 case Opt_type_hp:
 374                         ufs_clear_opt (*mount_options, UFSTYPE);
 375                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 376                         break;
 377                 case Opt_type_nextstepcd:
 378                         ufs_clear_opt (*mount_options, UFSTYPE);
 379                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 380                         break;
 381                 case Opt_type_nextstep:
 382                         ufs_clear_opt (*mount_options, UFSTYPE);
 383                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 384                         break;
 385                 case Opt_type_openstep:
 386                         ufs_clear_opt (*mount_options, UFSTYPE);
 387                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 388                         break;
 389                 case Opt_onerror_panic:
 390                         ufs_clear_opt (*mount_options, ONERROR);
 391                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 392                         break;
 393                 case Opt_onerror_lock:
 394                         ufs_clear_opt (*mount_options, ONERROR);
 395                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 396                         break;
 397                 case Opt_onerror_umount:
 398                         ufs_clear_opt (*mount_options, ONERROR);
 399                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 400                         break;
 401                 case Opt_onerror_repair:
 402                         printk("UFS-fs: Unable to do repair on error, "
 403                                 "will lock lock instead\n");
 404                         ufs_clear_opt (*mount_options, ONERROR);
 405                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 406                         break;
 407                 default:
 408                         printk("UFS-fs: Invalid option: \"%s\" "
 409                                         "or missing value\n", p);
 410                         return 0;
 411                 }
 412         }
 413         return 1;
 414 }
 415
 416 /*
 417  * Diffrent types of UFS hold fs_cstotal in different
 418  * places, and use diffrent data structure for it.
 419  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 420  */
 421 static void ufs_setup_cstotal(struct super_block *sb)
 422 {
 423         struct ufs_sb_info *sbi = UFS_SB(sb);
 424         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 425         struct ufs_super_block_first *usb1;
 426         struct ufs_super_block_second *usb2;
 427         struct ufs_super_block_third *usb3;
 428         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 429
 430         UFSD("ENTER, mtype=%u\n", mtype);
 431         usb1 = ubh_get_usb_first(uspi);
 432         usb2 = ubh_get_usb_second(uspi);
 433         usb3 = ubh_get_usb_third(uspi);
 434
 435         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 436              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 437             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 438                 /*we have statistic in different place, then usual*/
 439                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 440                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 441                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 442                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 443         } else {
 444                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 445                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 446                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 447                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 448         }
 449         UFSD("EXIT\n");
 450 }
 451
 452 /*
 453  * Read on-disk structures associated with cylinder groups
 454  */
 455 static int ufs_read_cylinder_structures(struct super_block *sb)
 456 {
 457         struct ufs_sb_info *sbi = UFS_SB(sb);
 458         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 459         struct ufs_buffer_head * ubh;
 460         unsigned char * base, * space;
 461         unsigned size, blks, i;
 462         struct ufs_super_block_third *usb3;
 463
 464         UFSD("ENTER\n");
 465
 466         usb3 = ubh_get_usb_third(uspi);
 467         /*
 468          * Read cs structures from (usually) first data block
 469          * on the device.
 470          */
 471         size = uspi->s_cssize;
 472         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 473         base = space = kmalloc(size, GFP_KERNEL);
 474         if (!base)
 475                 goto failed;
 476         sbi->s_csp = (struct ufs_csum *)space;
 477         for (i = 0; i < blks; i += uspi->s_fpb) {
 478                 size = uspi->s_bsize;
 479                 if (i + uspi->s_fpb > blks)
 480                         size = (blks - i) * uspi->s_fsize;
 481
 482                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 483
 484                 if (!ubh)
 485                         goto failed;
 486
 487                 ubh_ubhcpymem (space, ubh, size);
 488
 489                 space += size;
 490                 ubh_brelse (ubh);
 491                 ubh = NULL;
 492         }
 493
 494         /*
 495          * Read cylinder group (we read only first fragment from block
 496          * at this time) and prepare internal data structures for cg caching.
 497          */
 498         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 499                 goto failed;
 500         for (i = 0; i < uspi->s_ncg; i++)
 501                 sbi->s_ucg[i] = NULL;
 502         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 503                 sbi->s_ucpi[i] = NULL;
 504                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 505         }
 506         for (i = 0; i < uspi->s_ncg; i++) {
 507                 UFSD("read cg %u\n", i);
 508                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 509                         goto failed;
 510                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 511                         goto failed;
 512
 513                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 514         }
 515         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 516                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 517                         goto failed;
 518                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 519         }
 520         sbi->s_cg_loaded = 0;
 521         UFSD("EXIT\n");
 522         return 1;
 523
 524 failed:
 525         kfree (base);
 526         if (sbi->s_ucg) {
 527                 for (i = 0; i < uspi->s_ncg; i++)
 528                         if (sbi->s_ucg[i])
 529                                 brelse (sbi->s_ucg[i]);
 530                 kfree (sbi->s_ucg);
 531                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 532                         kfree (sbi->s_ucpi[i]);
 533         }
 534         UFSD("EXIT (FAILED)\n");
 535         return 0;
 536 }
 537
 538 /*
 539  * Sync our internal copy of fs_cstotal with disk
 540  */
 541 static void ufs_put_cstotal(struct super_block *sb)
 542 {
 543         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 544         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 545         struct ufs_super_block_first *usb1;
 546         struct ufs_super_block_second *usb2;
 547         struct ufs_super_block_third *usb3;
 548
 549         UFSD("ENTER\n");
 550         usb1 = ubh_get_usb_first(uspi);
 551         usb2 = ubh_get_usb_second(uspi);
 552         usb3 = ubh_get_usb_third(uspi);
 553
 554         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 555              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 556             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 557                 /*we have statistic in different place, then usual*/
 558                 usb2->fs_un.fs_u2.cs_ndir =
 559                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 560                 usb2->fs_un.fs_u2.cs_nbfree =
 561                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 562                 usb3->fs_un1.fs_u2.cs_nifree =
 563                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 564                 usb3->fs_un1.fs_u2.cs_nffree =
 565                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 566         } else {
 567                 usb1->fs_cstotal.cs_ndir =
 568                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 569                 usb1->fs_cstotal.cs_nbfree =
 570                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 571                 usb1->fs_cstotal.cs_nifree =
 572                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 573                 usb1->fs_cstotal.cs_nffree =
 574                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 575         }
 576         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 577         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 578         UFSD("EXIT\n");
 579 }
 580
 581 /**
 582  * ufs_put_super_internal() - put on-disk intrenal structures
 583  * @sb: pointer to super_block structure
 584  * Put on-disk structures associated with cylinder groups
 585  * and write them back to disk, also update cs_total on disk
 586  */
 587 static void ufs_put_super_internal(struct super_block *sb)
 588 {
 589         struct ufs_sb_info *sbi = UFS_SB(sb);
 590         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 591         struct ufs_buffer_head * ubh;
 592         unsigned char * base, * space;
 593         unsigned blks, size, i;
 594
 595
 596         UFSD("ENTER\n");
 597         ufs_put_cstotal(sb);
 598         size = uspi->s_cssize;
 599         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 600         base = space = (char*) sbi->s_csp;
 601         for (i = 0; i < blks; i += uspi->s_fpb) {
 602                 size = uspi->s_bsize;
 603                 if (i + uspi->s_fpb > blks)
 604                         size = (blks - i) * uspi->s_fsize;
 605
 606                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 607
 608                 ubh_memcpyubh (ubh, space, size);
 609                 space += size;
 610                 ubh_mark_buffer_uptodate (ubh, 1);
 611                 ubh_mark_buffer_dirty (ubh);
 612                 ubh_brelse (ubh);
 613         }
 614         for (i = 0; i < sbi->s_cg_loaded; i++) {
 615                 ufs_put_cylinder (sb, i);
 616                 kfree (sbi->s_ucpi[i]);
 617         }
 618         for (; i < UFS_MAX_GROUP_LOADED; i++)
 619                 kfree (sbi->s_ucpi[i]);
 620         for (i = 0; i < uspi->s_ncg; i++)
 621                 brelse (sbi->s_ucg[i]);
 622         kfree (sbi->s_ucg);
 623         kfree (base);
 624         UFSD("EXIT\n");
 625 }
 626
 627 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 628 {
 629         struct ufs_sb_info * sbi;
 630         struct ufs_sb_private_info * uspi;
 631         struct ufs_super_block_first * usb1;
 632         struct ufs_super_block_second * usb2;
 633         struct ufs_super_block_third * usb3;
 634         struct ufs_buffer_head * ubh;
 635         struct inode *inode;
 636         unsigned block_size, super_block_size;
 637         unsigned flags;
 638         unsigned super_block_offset;
 639         unsigned maxsymlen;
 640         int ret = -EINVAL;
 641
 642         uspi = NULL;
 643         ubh = NULL;
 644         flags = 0;
 645
 646         UFSD("ENTER\n");
 647
 648         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 649         if (!sbi)
 650                 goto failed_nomem;
 651         sb->s_fs_info = sbi;
 652
 653         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 654
 655 #ifndef CONFIG_UFS_FS_WRITE
 656         if (!(sb->s_flags & MS_RDONLY)) {
 657                 printk("ufs was compiled with read-only support, "
 658                 "can't be mounted as read-write\n");
 659                 goto failed;
 660         }
 661 #endif
 662         /*
 663          * Set default mount options
 664          * Parse mount options
 665          */
 666         sbi->s_mount_opt = 0;
 667         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 668         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 669                 printk("wrong mount options\n");
 670                 goto failed;
 671         }
 672         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 673                 if (!silent)
 674                         printk("You didn't specify the type of your ufs filesystem\n\n"
 675                         "mount -t ufs -o ufstype="
 676                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 677                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 678                         "default is ufstype=old\n");
 679                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 680         }
 681
 682         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 683         sbi->s_uspi = uspi;
 684         if (!uspi)
 685                 goto failed;
 686         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 687         super_block_offset=UFS_SBLOCK;
 688
 689         /* Keep 2Gig file limit. Some UFS variants need to override
 690            this but as I don't know which I'll let those in the know loosen
 691            the rules */
 692         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 693         case UFS_MOUNT_UFSTYPE_44BSD:
 694                 UFSD("ufstype=44bsd\n");
 695                 uspi->s_fsize = block_size = 512;
 696                 uspi->s_fmask = ~(512 - 1);
 697                 uspi->s_fshift = 9;
 698                 uspi->s_sbsize = super_block_size = 1536;
 699                 uspi->s_sbbase = 0;
 700                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 701                 break;
 702         case UFS_MOUNT_UFSTYPE_UFS2:
 703                 UFSD("ufstype=ufs2\n");
 704                 super_block_offset=SBLOCK_UFS2;
 705                 uspi->s_fsize = block_size = 512;
 706                 uspi->s_fmask = ~(512 - 1);
 707                 uspi->s_fshift = 9;
 708                 uspi->s_sbsize = super_block_size = 1536;
 709                 uspi->s_sbbase =  0;
 710                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 711                 break;
 712
 713         case UFS_MOUNT_UFSTYPE_SUN:
 714                 UFSD("ufstype=sun\n");
 715                 uspi->s_fsize = block_size = 1024;
 716                 uspi->s_fmask = ~(1024 - 1);
 717                 uspi->s_fshift = 10;
 718                 uspi->s_sbsize = super_block_size = 2048;
 719                 uspi->s_sbbase = 0;
 720                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 721                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 722                 break;
 723
 724         case UFS_MOUNT_UFSTYPE_SUNOS:
 725                 UFSD(("ufstype=sunos\n"))
 726                 uspi->s_fsize = block_size = 1024;
 727                 uspi->s_fmask = ~(1024 - 1);
 728                 uspi->s_fshift = 10;
 729                 uspi->s_sbsize = 2048;
 730                 super_block_size = 2048;
 731                 uspi->s_sbbase = 0;
 732                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 733                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 734                 break;
 735
 736         case UFS_MOUNT_UFSTYPE_SUNx86:
 737                 UFSD("ufstype=sunx86\n");
 738                 uspi->s_fsize = block_size = 1024;
 739                 uspi->s_fmask = ~(1024 - 1);
 740                 uspi->s_fshift = 10;
 741                 uspi->s_sbsize = super_block_size = 2048;
 742                 uspi->s_sbbase = 0;
 743                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 744                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 745                 break;
 746
 747         case UFS_MOUNT_UFSTYPE_OLD:
 748                 UFSD("ufstype=old\n");
 749                 uspi->s_fsize = block_size = 1024;
 750                 uspi->s_fmask = ~(1024 - 1);
 751                 uspi->s_fshift = 10;
 752                 uspi->s_sbsize = super_block_size = 2048;
 753                 uspi->s_sbbase = 0;
 754                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 755                 if (!(sb->s_flags & MS_RDONLY)) {
 756                         if (!silent)
 757                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 758                         sb->s_flags |= MS_RDONLY;
 759                 }
 760                 break;
 761
 762         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 763                 UFSD("ufstype=nextstep\n");
 764                 uspi->s_fsize = block_size = 1024;
 765                 uspi->s_fmask = ~(1024 - 1);
 766                 uspi->s_fshift = 10;
 767                 uspi->s_sbsize = super_block_size = 2048;
 768                 uspi->s_sbbase = 0;
 769                 uspi->s_dirblksize = 1024;
 770                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 771                 if (!(sb->s_flags & MS_RDONLY)) {
 772                         if (!silent)
 773                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 774                         sb->s_flags |= MS_RDONLY;
 775                 }
 776                 break;
 777
 778         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 779                 UFSD("ufstype=nextstep-cd\n");
 780                 uspi->s_fsize = block_size = 2048;
 781                 uspi->s_fmask = ~(2048 - 1);
 782                 uspi->s_fshift = 11;
 783                 uspi->s_sbsize = super_block_size = 2048;
 784                 uspi->s_sbbase = 0;
 785                 uspi->s_dirblksize = 1024;
 786                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 787                 if (!(sb->s_flags & MS_RDONLY)) {
 788                         if (!silent)
 789                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 790                         sb->s_flags |= MS_RDONLY;
 791                 }
 792                 break;
 793
 794         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 795                 UFSD("ufstype=openstep\n");
 796                 uspi->s_fsize = block_size = 1024;
 797                 uspi->s_fmask = ~(1024 - 1);
 798                 uspi->s_fshift = 10;
 799                 uspi->s_sbsize = super_block_size = 2048;
 800                 uspi->s_sbbase = 0;
 801                 uspi->s_dirblksize = 1024;
 802                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 803                 if (!(sb->s_flags & MS_RDONLY)) {
 804                         if (!silent)
 805                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 806                         sb->s_flags |= MS_RDONLY;
 807                 }
 808                 break;
 809
 810         case UFS_MOUNT_UFSTYPE_HP:
 811                 UFSD("ufstype=hp\n");
 812                 uspi->s_fsize = block_size = 1024;
 813                 uspi->s_fmask = ~(1024 - 1);
 814                 uspi->s_fshift = 10;
 815                 uspi->s_sbsize = super_block_size = 2048;
 816                 uspi->s_sbbase = 0;
 817                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 818                 if (!(sb->s_flags & MS_RDONLY)) {
 819                         if (!silent)
 820                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 821                         sb->s_flags |= MS_RDONLY;
 822                 }
 823                 break;
 824         default:
 825                 if (!silent)
 826                         printk("unknown ufstype\n");
 827                 goto failed;
 828         }
 829
 830 again:
 831         if (!sb_set_blocksize(sb, block_size)) {
 832                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 833                 goto failed;
 834         }
 835
 836         /*
 837          * read ufs super block from device
 838          */
 839
 840         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 841
 842         if (!ubh)
 843             goto failed;
 844
 845         usb1 = ubh_get_usb_first(uspi);
 846         usb2 = ubh_get_usb_second(uspi);
 847         usb3 = ubh_get_usb_third(uspi);
 848
 849         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 850         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 851         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 852             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 853                 flags &= ~UFS_ST_MASK;
 854                 flags |=  UFS_ST_SUN;
 855         }
 856
 857         /*
 858          * Check ufs magic number
 859          */
 860         sbi->s_bytesex = BYTESEX_LE;
 861         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 862                 case UFS_MAGIC:
 863                 case UFS2_MAGIC:
 864                 case UFS_MAGIC_LFN:
 865                 case UFS_MAGIC_FEA:
 866                 case UFS_MAGIC_4GB:
 867                         goto magic_found;
 868         }
 869         sbi->s_bytesex = BYTESEX_BE;
 870         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 871                 case UFS_MAGIC:
 872                 case UFS2_MAGIC:
 873                 case UFS_MAGIC_LFN:
 874                 case UFS_MAGIC_FEA:
 875                 case UFS_MAGIC_4GB:
 876                         goto magic_found;
 877         }
 878
 879         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 880           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 881           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 882           && uspi->s_sbbase < 256) {
 883                 ubh_brelse_uspi(uspi);
 884                 ubh = NULL;
 885                 uspi->s_sbbase += 8;
 886                 goto again;
 887         }
 888         if (!silent)
 889                 printk("ufs_read_super: bad magic number\n");
 890         goto failed;
 891
 892 magic_found:
 893         /*
 894          * Check block and fragment sizes
 895          */
 896         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 897         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 898         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 899         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 900         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 901
 902         if (!is_power_of_2(uspi->s_fsize)) {
 903                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 904                         uspi->s_fsize);
 905                         goto failed;
 906         }
 907         if (uspi->s_fsize < 512) {
 908                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 909                         uspi->s_fsize);
 910                 goto failed;
 911         }
 912         if (uspi->s_fsize > 4096) {
 913                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 914                         uspi->s_fsize);
 915                 goto failed;
 916         }
 917         if (!is_power_of_2(uspi->s_bsize)) {
 918                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 919                         uspi->s_bsize);
 920                 goto failed;
 921         }
 922         if (uspi->s_bsize < 4096) {
 923                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 924                         uspi->s_bsize);
 925                 goto failed;
 926         }
 927         if (uspi->s_bsize / uspi->s_fsize > 8) {
 928                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 929                         uspi->s_bsize / uspi->s_fsize);
 930                 goto failed;
 931         }
 932         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 933                 ubh_brelse_uspi(uspi);
 934                 ubh = NULL;
 935                 block_size = uspi->s_fsize;
 936                 super_block_size = uspi->s_sbsize;
 937                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 938                 goto again;
 939         }
 940
 941         sbi->s_flags = flags;/*after that line some functions use s_flags*/
 942         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 943
 944         /*
 945          * Check, if file system was correctly unmounted.
 946          * If not, make it read only.
 947          */
 948         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 949           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 950           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 951             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 952           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 953           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 954                 switch(usb1->fs_clean) {
 955                 case UFS_FSCLEAN:
 956                         UFSD("fs is clean\n");
 957                         break;
 958                 case UFS_FSSTABLE:
 959                         UFSD("fs is stable\n");
 960                         break;
 961                 case UFS_FSOSF1:
 962                         UFSD("fs is DEC OSF/1\n");
 963                         break;
 964                 case UFS_FSACTIVE:
 965                         printk("ufs_read_super: fs is active\n");
 966                         sb->s_flags |= MS_RDONLY;
 967                         break;
 968                 case UFS_FSBAD:
 969                         printk("ufs_read_super: fs is bad\n");
 970                         sb->s_flags |= MS_RDONLY;
 971                         break;
 972                 default:
 973                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 974                         sb->s_flags |= MS_RDONLY;
 975                         break;
 976                 }
 977         } else {
 978                 printk("ufs_read_super: fs needs fsck\n");
 979                 sb->s_flags |= MS_RDONLY;
 980         }
 981
 982         /*
 983          * Read ufs_super_block into internal data structures
 984          */
 985         sb->s_op = &ufs_super_ops;
 986         sb->dq_op = NULL; /***/
 987         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 988
 989         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 990         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 991         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 992         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 993         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 994         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 995
 996         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 997                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 998                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 999         } else {
1000                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1001                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1002         }
1003
1004         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1005         /* s_bsize already set */
1006         /* s_fsize already set */
1007         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1008         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1009         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1010         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1011         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1012         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1013         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1014                 uspi->s_fshift);
1015         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1016         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1017         /* s_sbsize already set */
1018         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1019         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1020         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1021         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1022         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1023         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1024         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1025         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1026
1027         if (uspi->fs_magic == UFS2_MAGIC)
1028                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1029         else
1030                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1031
1032         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1033         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1034         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1035         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1036         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1037         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1038         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1039         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1040         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1041         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1042         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1043         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1044         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1045         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1046
1047         /*
1048          * Compute another frequently used values
1049          */
1050         uspi->s_fpbmask = uspi->s_fpb - 1;
1051         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1052                 uspi->s_apbshift = uspi->s_bshift - 3;
1053         else
1054                 uspi->s_apbshift = uspi->s_bshift - 2;
1055
1056         uspi->s_2apbshift = uspi->s_apbshift * 2;
1057         uspi->s_3apbshift = uspi->s_apbshift * 3;
1058         uspi->s_apb = 1 << uspi->s_apbshift;
1059         uspi->s_2apb = 1 << uspi->s_2apbshift;
1060         uspi->s_3apb = 1 << uspi->s_3apbshift;
1061         uspi->s_apbmask = uspi->s_apb - 1;
1062         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1063         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1064         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1065         uspi->s_bpf = uspi->s_fsize << 3;
1066         uspi->s_bpfshift = uspi->s_fshift + 3;
1067         uspi->s_bpfmask = uspi->s_bpf - 1;
1068         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1069             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1070                 uspi->s_maxsymlinklen =
1071                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1072
1073         if (uspi->fs_magic == UFS2_MAGIC)
1074                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1075         else
1076                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1077         if (uspi->s_maxsymlinklen > maxsymlen) {
1078                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1079                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1080                 uspi->s_maxsymlinklen = maxsymlen;
1081         }
1082
1083         inode = ufs_iget(sb, UFS_ROOTINO);
1084         if (IS_ERR(inode)) {
1085                 ret = PTR_ERR(inode);
1086                 goto failed;
1087         }
1088         sb->s_root = d_alloc_root(inode);
1089         if (!sb->s_root) {
1090                 ret = -ENOMEM;
1091                 goto dalloc_failed;
1092         }
1093
1094         ufs_setup_cstotal(sb);
1095         /*
1096          * Read cylinder group structures
1097          */
1098         if (!(sb->s_flags & MS_RDONLY))
1099                 if (!ufs_read_cylinder_structures(sb))
1100                         goto failed;
1101
1102         UFSD("EXIT\n");
1103         return 0;
1104
1105 dalloc_failed:
1106         iput(inode);
1107 failed:
1108         if (ubh)
1109                 ubh_brelse_uspi (uspi);
1110         kfree (uspi);
1111         kfree(sbi);
1112         sb->s_fs_info = NULL;
1113         UFSD("EXIT (FAILED)\n");
1114         return ret;
1115
1116 failed_nomem:
1117         UFSD("EXIT (NOMEM)\n");
1118         return -ENOMEM;
1119 }
1120
1121 static void ufs_write_super(struct super_block *sb)
1122 {
1123         struct ufs_sb_private_info * uspi;
1124         struct ufs_super_block_first * usb1;
1125         struct ufs_super_block_third * usb3;
1126         unsigned flags;
1127
1128         lock_kernel();
1129         UFSD("ENTER\n");
1130         flags = UFS_SB(sb)->s_flags;
1131         uspi = UFS_SB(sb)->s_uspi;
1132         usb1 = ubh_get_usb_first(uspi);
1133         usb3 = ubh_get_usb_third(uspi);
1134
1135         if (!(sb->s_flags & MS_RDONLY)) {
1136                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1137                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1138                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1139                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1140                         ufs_set_fs_state(sb, usb1, usb3,
1141                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1142                 ufs_put_cstotal(sb);
1143         }
1144         sb->s_dirt = 0;
1145         UFSD("EXIT\n");
1146         unlock_kernel();
1147 }
1148
1149 static void ufs_put_super(struct super_block *sb)
1150 {
1151         struct ufs_sb_info * sbi = UFS_SB(sb);
1152
1153         UFSD("ENTER\n");
1154
1155         if (!(sb->s_flags & MS_RDONLY))
1156                 ufs_put_super_internal(sb);
1157
1158         ubh_brelse_uspi (sbi->s_uspi);
1159         kfree (sbi->s_uspi);
1160         kfree (sbi);
1161         sb->s_fs_info = NULL;
1162         UFSD("EXIT\n");
1163         return;
1164 }
1165
1166
1167 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1168 {
1169         struct ufs_sb_private_info * uspi;
1170         struct ufs_super_block_first * usb1;
1171         struct ufs_super_block_third * usb3;
1172         unsigned new_mount_opt, ufstype;
1173         unsigned flags;
1174
1175         uspi = UFS_SB(sb)->s_uspi;
1176         flags = UFS_SB(sb)->s_flags;
1177         usb1 = ubh_get_usb_first(uspi);
1178         usb3 = ubh_get_usb_third(uspi);
1179
1180         /*
1181          * Allow the "check" option to be passed as a remount option.
1182          * It is not possible to change ufstype option during remount
1183          */
1184         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1185         new_mount_opt = 0;
1186         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1187         if (!ufs_parse_options (data, &new_mount_opt))
1188                 return -EINVAL;
1189         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1190                 new_mount_opt |= ufstype;
1191         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1192                 printk("ufstype can't be changed during remount\n");
1193                 return -EINVAL;
1194         }
1195
1196         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1197                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1198                 return 0;
1199         }
1200
1201         /*
1202          * fs was mouted as rw, remounting ro
1203          */
1204         if (*mount_flags & MS_RDONLY) {
1205                 ufs_put_super_internal(sb);
1206                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1207                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1208                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1209                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1210                         ufs_set_fs_state(sb, usb1, usb3,
1211                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1212                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1213                 sb->s_dirt = 0;
1214                 sb->s_flags |= MS_RDONLY;
1215         } else {
1216         /*
1217          * fs was mounted as ro, remounting rw
1218          */
1219 #ifndef CONFIG_UFS_FS_WRITE
1220                 printk("ufs was compiled with read-only support, "
1221                 "can't be mounted as read-write\n");
1222                 return -EINVAL;
1223 #else
1224                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1225                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1226                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1227                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1228                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1229                         printk("this ufstype is read-only supported\n");
1230                         return -EINVAL;
1231                 }
1232                 if (!ufs_read_cylinder_structures(sb)) {
1233                         printk("failed during remounting\n");
1234                         return -EPERM;
1235                 }
1236                 sb->s_flags &= ~MS_RDONLY;
1237 #endif
1238         }
1239         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1240         return 0;
1241 }
1242
1243 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1244 {
1245         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1246         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1247         const struct match_token *tp = tokens;
1248
1249         while (tp->token != Opt_onerror_panic && tp->token != mval)
1250                 ++tp;
1251         BUG_ON(tp->token == Opt_onerror_panic);
1252         seq_printf(seq, ",%s", tp->pattern);
1253
1254         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1255         while (tp->token != Opt_err && tp->token != mval)
1256                 ++tp;
1257         BUG_ON(tp->token == Opt_err);
1258         seq_printf(seq, ",%s", tp->pattern);
1259
1260         return 0;
1261 }
1262
1263 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1264 {
1265         struct super_block *sb = dentry->d_sb;
1266         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1267         unsigned  flags = UFS_SB(sb)->s_flags;
1268         struct ufs_super_block_first *usb1;
1269         struct ufs_super_block_second *usb2;
1270         struct ufs_super_block_third *usb3;
1271
1272         lock_kernel();
1273
1274         usb1 = ubh_get_usb_first(uspi);
1275         usb2 = ubh_get_usb_second(uspi);
1276         usb3 = ubh_get_usb_third(uspi);
1277
1278         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1279                 buf->f_type = UFS2_MAGIC;
1280                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1281         } else {
1282                 buf->f_type = UFS_MAGIC;
1283                 buf->f_blocks = uspi->s_dsize;
1284         }
1285         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1286                 uspi->cs_total.cs_nffree;
1287         buf->f_ffree = uspi->cs_total.cs_nifree;
1288         buf->f_bsize = sb->s_blocksize;
1289         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1290                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1291         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1292         buf->f_namelen = UFS_MAXNAMLEN;
1293
1294         unlock_kernel();
1295
1296         return 0;
1297 }
1298
1299 static struct kmem_cache * ufs_inode_cachep;
1300
1301 static struct inode *ufs_alloc_inode(struct super_block *sb)
1302 {
1303         struct ufs_inode_info *ei;
1304         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1305         if (!ei)
1306                 return NULL;
1307         ei->vfs_inode.i_version = 1;
1308         return &ei->vfs_inode;
1309 }
1310
1311 static void ufs_destroy_inode(struct inode *inode)
1312 {
1313         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1314 }
1315
1316 static void init_once(void *foo)
1317 {
1318         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1319
1320         inode_init_once(&ei->vfs_inode);
1321 }
1322
1323 static int init_inodecache(void)
1324 {
1325         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1326                                              sizeof(struct ufs_inode_info),
1327                                              0, (SLAB_RECLAIM_ACCOUNT|
1328                                                 SLAB_MEM_SPREAD),
1329                                              init_once);
1330         if (ufs_inode_cachep == NULL)
1331                 return -ENOMEM;
1332         return 0;
1333 }
1334
1335 static void destroy_inodecache(void)
1336 {
1337         kmem_cache_destroy(ufs_inode_cachep);
1338 }
1339
1340 #ifdef CONFIG_QUOTA
1341 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1342 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1343 #endif
1344
1345 static const struct super_operations ufs_super_ops = {
1346         .alloc_inode    = ufs_alloc_inode,
1347         .destroy_inode  = ufs_destroy_inode,
1348         .write_inode    = ufs_write_inode,
1349         .delete_inode   = ufs_delete_inode,
1350         .put_super      = ufs_put_super,
1351         .write_super    = ufs_write_super,
1352         .statfs         = ufs_statfs,
1353         .remount_fs     = ufs_remount,
1354         .show_options   = ufs_show_options,
1355 #ifdef CONFIG_QUOTA
1356         .quota_read     = ufs_quota_read,
1357         .quota_write    = ufs_quota_write,
1358 #endif
1359 };
1360
1361 #ifdef CONFIG_QUOTA
1362
1363 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1364  * acquiring the locks... As quota files are never truncated and quota code
1365  * itself serializes the operations (and noone else should touch the files)
1366  * we don't have to be afraid of races */
1367 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1368                                size_t len, loff_t off)
1369 {
1370         struct inode *inode = sb_dqopt(sb)->files[type];
1371         sector_t blk = off >> sb->s_blocksize_bits;
1372         int err = 0;
1373         int offset = off & (sb->s_blocksize - 1);
1374         int tocopy;
1375         size_t toread;
1376         struct buffer_head *bh;
1377         loff_t i_size = i_size_read(inode);
1378
1379         if (off > i_size)
1380                 return 0;
1381         if (off+len > i_size)
1382                 len = i_size-off;
1383         toread = len;
1384         while (toread > 0) {
1385                 tocopy = sb->s_blocksize - offset < toread ?
1386                                 sb->s_blocksize - offset : toread;
1387
1388                 bh = ufs_bread(inode, blk, 0, &err);
1389                 if (err)
1390                         return err;
1391                 if (!bh)        /* A hole? */
1392                         memset(data, 0, tocopy);
1393                 else {
1394                         memcpy(data, bh->b_data+offset, tocopy);
1395                         brelse(bh);
1396                 }
1397                 offset = 0;
1398                 toread -= tocopy;
1399                 data += tocopy;
1400                 blk++;
1401         }
1402         return len;
1403 }
1404
1405 /* Write to quotafile */
1406 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1407                                 const char *data, size_t len, loff_t off)
1408 {
1409         struct inode *inode = sb_dqopt(sb)->files[type];
1410         sector_t blk = off >> sb->s_blocksize_bits;
1411         int err = 0;
1412         int offset = off & (sb->s_blocksize - 1);
1413         int tocopy;
1414         size_t towrite = len;
1415         struct buffer_head *bh;
1416
1417         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1418         while (towrite > 0) {
1419                 tocopy = sb->s_blocksize - offset < towrite ?
1420                                 sb->s_blocksize - offset : towrite;
1421
1422                 bh = ufs_bread(inode, blk, 1, &err);
1423                 if (!bh)
1424                         goto out;
1425                 lock_buffer(bh);
1426                 memcpy(bh->b_data+offset, data, tocopy);
1427                 flush_dcache_page(bh->b_page);
1428                 set_buffer_uptodate(bh);
1429                 mark_buffer_dirty(bh);
1430                 unlock_buffer(bh);
1431                 brelse(bh);
1432                 offset = 0;
1433                 towrite -= tocopy;
1434                 data += tocopy;
1435                 blk++;
1436         }
1437 out:
1438         if (len == towrite) {
1439                 mutex_unlock(&inode->i_mutex);
1440                 return err;
1441         }
1442         if (inode->i_size < off+len-towrite)
1443                 i_size_write(inode, off+len-towrite);
1444         inode->i_version++;
1445         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1446         mark_inode_dirty(inode);
1447         mutex_unlock(&inode->i_mutex);
1448         return len - towrite;
1449 }
1450
1451 #endif
1452
1453 static int ufs_get_sb(struct file_system_type *fs_type,
1454         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1455 {
1456         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1457 }
1458
1459 static struct file_system_type ufs_fs_type = {
1460         .owner          = THIS_MODULE,
1461         .name           = "ufs",
1462         .get_sb         = ufs_get_sb,
1463         .kill_sb        = kill_block_super,
1464         .fs_flags       = FS_REQUIRES_DEV,
1465 };
1466
1467 static int __init init_ufs_fs(void)
1468 {
1469         int err = init_inodecache();
1470         if (err)
1471                 goto out1;
1472         err = register_filesystem(&ufs_fs_type);
1473         if (err)
1474                 goto out;
1475         return 0;
1476 out:
1477         destroy_inodecache();
1478 out1:
1479         return err;
1480 }
1481
1482 static void __exit exit_ufs_fs(void)
1483 {
1484         unregister_filesystem(&ufs_fs_type);
1485         destroy_inodecache();
1486 }
1487
1488 module_init(init_ufs_fs)
1489 module_exit(exit_ufs_fs)
1490 MODULE_LICENSE("GPL");