SAFE public projects git trees. - safe/jmp/linux-2.6/blob - fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gertjan@cs.vu.nl>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68
  69 #include <linux/module.h>
  70 #include <linux/bitops.h>
  71
  72 #include <stdarg.h>
  73
  74 #include <asm/uaccess.h>
  75 #include <asm/system.h>
  76
  77 #include <linux/errno.h>
  78 #include <linux/fs.h>
  79 #include <linux/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 "swab.h"
  95 #include "util.h"
  96
  97 #ifdef CONFIG_UFS_DEBUG
  98 /*
  99  * Print contents of ufs_super_block, useful for debugging
 100  */
 101 static void ufs_print_super_stuff(struct super_block *sb,
 102                                   struct ufs_super_block_first *usb1,
 103                                   struct ufs_super_block_second *usb2,
 104                                   struct ufs_super_block_third *usb3)
 105 {
 106         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 107
 108         printk("ufs_print_super_stuff\n");
 109         printk("  magic:     0x%x\n", magic);
 110         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 111                 printk("  fs_size:   %llu\n", (unsigned long long)
 112                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 113                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 114                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 115                 printk("  bsize:         %u\n",
 116                        fs32_to_cpu(sb, usb1->fs_bsize));
 117                 printk("  fsize:         %u\n",
 118                        fs32_to_cpu(sb, usb1->fs_fsize));
 119                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 120                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 121                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 122                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 123                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 124                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 125                        (unsigned long long)
 126                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 127                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 128                        (unsigned long long)
 129                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 130                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 131                        (unsigned long long)
 132                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 133         } else {
 134                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 135                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 136                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 137                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 138                 printk(" cgoffset:    %u\n",
 139                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 140                 printk(" ~cgmask:     0x%x\n",
 141                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 142                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 143                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 144                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 145                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 146                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 147                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 148                 printk(" fragshift:   %u\n",
 149                        fs32_to_cpu(sb, usb1->fs_fragshift));
 150                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 151                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 152                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 153                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 154                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 155                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 156                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 157                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 158                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 159                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 160                 printk(" fstodb:      %u\n",
 161                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 162                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 163                 printk(" ndir         %u\n",
 164                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 165                 printk(" nifree       %u\n",
 166                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 167                 printk(" nbfree       %u\n",
 168                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 169                 printk(" nffree       %u\n",
 170                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 171         }
 172         printk("\n");
 173 }
 174
 175 /*
 176  * Print contents of ufs_cylinder_group, useful for debugging
 177  */
 178 static void ufs_print_cylinder_stuff(struct super_block *sb,
 179                                      struct ufs_cylinder_group *cg)
 180 {
 181         printk("\nufs_print_cylinder_stuff\n");
 182         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 183         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 184         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 185         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 186         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 187         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 188         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 189         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 190         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 191         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 192         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 193         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 194         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 195         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 196         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 197             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 198             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 199             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 200             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 201         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 202         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 203         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 204         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 205         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 206         printk("  clustersumoff %u\n",
 207                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 208         printk("  clusteroff    %u\n",
 209                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 210         printk("  nclusterblks  %u\n",
 211                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 212         printk("\n");
 213 }
 214 #else
 215 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 216 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 217 #endif /* CONFIG_UFS_DEBUG */
 218
 219 static const struct super_operations ufs_super_ops;
 220
 221 static char error_buf[1024];
 222
 223 void ufs_error (struct super_block * sb, const char * function,
 224         const char * fmt, ...)
 225 {
 226         struct ufs_sb_private_info * uspi;
 227         struct ufs_super_block_first * usb1;
 228         va_list args;
 229
 230         uspi = UFS_SB(sb)->s_uspi;
 231         usb1 = ubh_get_usb_first(uspi);
 232
 233         if (!(sb->s_flags & MS_RDONLY)) {
 234                 usb1->fs_clean = UFS_FSBAD;
 235                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 236                 sb->s_dirt = 1;
 237                 sb->s_flags |= MS_RDONLY;
 238         }
 239         va_start (args, fmt);
 240         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 241         va_end (args);
 242         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 243         case UFS_MOUNT_ONERROR_PANIC:
 244                 panic ("UFS-fs panic (device %s): %s: %s\n",
 245                         sb->s_id, function, error_buf);
 246
 247         case UFS_MOUNT_ONERROR_LOCK:
 248         case UFS_MOUNT_ONERROR_UMOUNT:
 249         case UFS_MOUNT_ONERROR_REPAIR:
 250                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 251                         sb->s_id, function, error_buf);
 252         }
 253 }
 254
 255 void ufs_panic (struct super_block * sb, const char * function,
 256         const char * fmt, ...)
 257 {
 258         struct ufs_sb_private_info * uspi;
 259         struct ufs_super_block_first * usb1;
 260         va_list args;
 261
 262         uspi = UFS_SB(sb)->s_uspi;
 263         usb1 = ubh_get_usb_first(uspi);
 264
 265         if (!(sb->s_flags & MS_RDONLY)) {
 266                 usb1->fs_clean = UFS_FSBAD;
 267                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 268                 sb->s_dirt = 1;
 269         }
 270         va_start (args, fmt);
 271         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 272         va_end (args);
 273         sb->s_flags |= MS_RDONLY;
 274         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 275                 sb->s_id, function, error_buf);
 276 }
 277
 278 void ufs_warning (struct super_block * sb, const char * function,
 279         const char * fmt, ...)
 280 {
 281         va_list args;
 282
 283         va_start (args, fmt);
 284         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 285         va_end (args);
 286         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 287                 sb->s_id, function, error_buf);
 288 }
 289
 290 enum {
 291        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 292        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 293        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 294        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 295        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 296        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 297        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 298        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 299        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 300        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 301        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 302        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 303        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 304        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 305        Opt_err
 306 };
 307
 308 static match_table_t tokens = {
 309         {Opt_type_old, "ufstype=old"},
 310         {Opt_type_sunx86, "ufstype=sunx86"},
 311         {Opt_type_sun, "ufstype=sun"},
 312         {Opt_type_sunos, "ufstype=sunos"},
 313         {Opt_type_44bsd, "ufstype=44bsd"},
 314         {Opt_type_ufs2, "ufstype=ufs2"},
 315         {Opt_type_ufs2, "ufstype=5xbsd"},
 316         {Opt_type_hp, "ufstype=hp"},
 317         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 318         {Opt_type_nextstep, "ufstype=nextstep"},
 319         {Opt_type_openstep, "ufstype=openstep"},
 320 /*end of possible ufs types */
 321         {Opt_onerror_panic, "onerror=panic"},
 322         {Opt_onerror_lock, "onerror=lock"},
 323         {Opt_onerror_umount, "onerror=umount"},
 324         {Opt_onerror_repair, "onerror=repair"},
 325         {Opt_err, NULL}
 326 };
 327
 328 static int ufs_parse_options (char * options, unsigned * mount_options)
 329 {
 330         char * p;
 331
 332         UFSD("ENTER\n");
 333
 334         if (!options)
 335                 return 1;
 336
 337         while ((p = strsep(&options, ",")) != NULL) {
 338                 substring_t args[MAX_OPT_ARGS];
 339                 int token;
 340                 if (!*p)
 341                         continue;
 342
 343                 token = match_token(p, tokens, args);
 344                 switch (token) {
 345                 case Opt_type_old:
 346                         ufs_clear_opt (*mount_options, UFSTYPE);
 347                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 348                         break;
 349                 case Opt_type_sunx86:
 350                         ufs_clear_opt (*mount_options, UFSTYPE);
 351                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 352                         break;
 353                 case Opt_type_sun:
 354                         ufs_clear_opt (*mount_options, UFSTYPE);
 355                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 356                         break;
 357                 case Opt_type_sunos:
 358                         ufs_clear_opt(*mount_options, UFSTYPE);
 359                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 360                         break;
 361                 case Opt_type_44bsd:
 362                         ufs_clear_opt (*mount_options, UFSTYPE);
 363                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 364                         break;
 365                 case Opt_type_ufs2:
 366                         ufs_clear_opt(*mount_options, UFSTYPE);
 367                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 368                         break;
 369                 case Opt_type_hp:
 370                         ufs_clear_opt (*mount_options, UFSTYPE);
 371                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 372                         break;
 373                 case Opt_type_nextstepcd:
 374                         ufs_clear_opt (*mount_options, UFSTYPE);
 375                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 376                         break;
 377                 case Opt_type_nextstep:
 378                         ufs_clear_opt (*mount_options, UFSTYPE);
 379                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 380                         break;
 381                 case Opt_type_openstep:
 382                         ufs_clear_opt (*mount_options, UFSTYPE);
 383                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 384                         break;
 385                 case Opt_onerror_panic:
 386                         ufs_clear_opt (*mount_options, ONERROR);
 387                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 388                         break;
 389                 case Opt_onerror_lock:
 390                         ufs_clear_opt (*mount_options, ONERROR);
 391                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 392                         break;
 393                 case Opt_onerror_umount:
 394                         ufs_clear_opt (*mount_options, ONERROR);
 395                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 396                         break;
 397                 case Opt_onerror_repair:
 398                         printk("UFS-fs: Unable to do repair on error, "
 399                                 "will lock lock instead\n");
 400                         ufs_clear_opt (*mount_options, ONERROR);
 401                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 402                         break;
 403                 default:
 404                         printk("UFS-fs: Invalid option: \"%s\" "
 405                                         "or missing value\n", p);
 406                         return 0;
 407                 }
 408         }
 409         return 1;
 410 }
 411
 412 /*
 413  * Diffrent types of UFS hold fs_cstotal in different
 414  * places, and use diffrent data structure for it.
 415  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 416  */
 417 static void ufs_setup_cstotal(struct super_block *sb)
 418 {
 419         struct ufs_sb_info *sbi = UFS_SB(sb);
 420         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 421         struct ufs_super_block_first *usb1;
 422         struct ufs_super_block_second *usb2;
 423         struct ufs_super_block_third *usb3;
 424         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 425
 426         UFSD("ENTER, mtype=%u\n", mtype);
 427         usb1 = ubh_get_usb_first(uspi);
 428         usb2 = ubh_get_usb_second(uspi);
 429         usb3 = ubh_get_usb_third(uspi);
 430
 431         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 432              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 433             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 434                 /*we have statistic in different place, then usual*/
 435                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 436                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 437                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 438                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 439         } else {
 440                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 441                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 442                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 443                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 444         }
 445         UFSD("EXIT\n");
 446 }
 447
 448 /*
 449  * Read on-disk structures associated with cylinder groups
 450  */
 451 static int ufs_read_cylinder_structures(struct super_block *sb)
 452 {
 453         struct ufs_sb_info *sbi = UFS_SB(sb);
 454         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 455         struct ufs_buffer_head * ubh;
 456         unsigned char * base, * space;
 457         unsigned size, blks, i;
 458         struct ufs_super_block_third *usb3;
 459
 460         UFSD("ENTER\n");
 461
 462         usb3 = ubh_get_usb_third(uspi);
 463         /*
 464          * Read cs structures from (usually) first data block
 465          * on the device.
 466          */
 467         size = uspi->s_cssize;
 468         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 469         base = space = kmalloc(size, GFP_KERNEL);
 470         if (!base)
 471                 goto failed;
 472         sbi->s_csp = (struct ufs_csum *)space;
 473         for (i = 0; i < blks; i += uspi->s_fpb) {
 474                 size = uspi->s_bsize;
 475                 if (i + uspi->s_fpb > blks)
 476                         size = (blks - i) * uspi->s_fsize;
 477
 478                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 479
 480                 if (!ubh)
 481                         goto failed;
 482
 483                 ubh_ubhcpymem (space, ubh, size);
 484
 485                 space += size;
 486                 ubh_brelse (ubh);
 487                 ubh = NULL;
 488         }
 489
 490         /*
 491          * Read cylinder group (we read only first fragment from block
 492          * at this time) and prepare internal data structures for cg caching.
 493          */
 494         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 495                 goto failed;
 496         for (i = 0; i < uspi->s_ncg; i++)
 497                 sbi->s_ucg[i] = NULL;
 498         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 499                 sbi->s_ucpi[i] = NULL;
 500                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 501         }
 502         for (i = 0; i < uspi->s_ncg; i++) {
 503                 UFSD("read cg %u\n", i);
 504                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 505                         goto failed;
 506                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 507                         goto failed;
 508
 509                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 510         }
 511         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 512                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 513                         goto failed;
 514                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 515         }
 516         sbi->s_cg_loaded = 0;
 517         UFSD("EXIT\n");
 518         return 1;
 519
 520 failed:
 521         kfree (base);
 522         if (sbi->s_ucg) {
 523                 for (i = 0; i < uspi->s_ncg; i++)
 524                         if (sbi->s_ucg[i])
 525                                 brelse (sbi->s_ucg[i]);
 526                 kfree (sbi->s_ucg);
 527                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 528                         kfree (sbi->s_ucpi[i]);
 529         }
 530         UFSD("EXIT (FAILED)\n");
 531         return 0;
 532 }
 533
 534 /*
 535  * Sync our internal copy of fs_cstotal with disk
 536  */
 537 static void ufs_put_cstotal(struct super_block *sb)
 538 {
 539         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 540         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 541         struct ufs_super_block_first *usb1;
 542         struct ufs_super_block_second *usb2;
 543         struct ufs_super_block_third *usb3;
 544
 545         UFSD("ENTER\n");
 546         usb1 = ubh_get_usb_first(uspi);
 547         usb2 = ubh_get_usb_second(uspi);
 548         usb3 = ubh_get_usb_third(uspi);
 549
 550         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 551              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 552             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 553                 /*we have statistic in different place, then usual*/
 554                 usb2->fs_un.fs_u2.cs_ndir =
 555                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 556                 usb2->fs_un.fs_u2.cs_nbfree =
 557                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 558                 usb3->fs_un1.fs_u2.cs_nifree =
 559                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 560                 usb3->fs_un1.fs_u2.cs_nffree =
 561                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 562         } else {
 563                 usb1->fs_cstotal.cs_ndir =
 564                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 565                 usb1->fs_cstotal.cs_nbfree =
 566                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 567                 usb1->fs_cstotal.cs_nifree =
 568                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 569                 usb1->fs_cstotal.cs_nffree =
 570                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 571         }
 572         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 573         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 574         UFSD("EXIT\n");
 575 }
 576
 577 /**
 578  * ufs_put_super_internal() - put on-disk intrenal structures
 579  * @sb: pointer to super_block structure
 580  * Put on-disk structures associated with cylinder groups
 581  * and write them back to disk, also update cs_total on disk
 582  */
 583 static void ufs_put_super_internal(struct super_block *sb)
 584 {
 585         struct ufs_sb_info *sbi = UFS_SB(sb);
 586         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 587         struct ufs_buffer_head * ubh;
 588         unsigned char * base, * space;
 589         unsigned blks, size, i;
 590
 591
 592         UFSD("ENTER\n");
 593         ufs_put_cstotal(sb);
 594         size = uspi->s_cssize;
 595         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 596         base = space = (char*) sbi->s_csp;
 597         for (i = 0; i < blks; i += uspi->s_fpb) {
 598                 size = uspi->s_bsize;
 599                 if (i + uspi->s_fpb > blks)
 600                         size = (blks - i) * uspi->s_fsize;
 601
 602                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 603
 604                 ubh_memcpyubh (ubh, space, size);
 605                 space += size;
 606                 ubh_mark_buffer_uptodate (ubh, 1);
 607                 ubh_mark_buffer_dirty (ubh);
 608                 ubh_brelse (ubh);
 609         }
 610         for (i = 0; i < sbi->s_cg_loaded; i++) {
 611                 ufs_put_cylinder (sb, i);
 612                 kfree (sbi->s_ucpi[i]);
 613         }
 614         for (; i < UFS_MAX_GROUP_LOADED; i++)
 615                 kfree (sbi->s_ucpi[i]);
 616         for (i = 0; i < uspi->s_ncg; i++)
 617                 brelse (sbi->s_ucg[i]);
 618         kfree (sbi->s_ucg);
 619         kfree (base);
 620         UFSD("EXIT\n");
 621 }
 622
 623 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 624 {
 625         struct ufs_sb_info * sbi;
 626         struct ufs_sb_private_info * uspi;
 627         struct ufs_super_block_first * usb1;
 628         struct ufs_super_block_second * usb2;
 629         struct ufs_super_block_third * usb3;
 630         struct ufs_buffer_head * ubh;
 631         struct inode *inode;
 632         unsigned block_size, super_block_size;
 633         unsigned flags;
 634         unsigned super_block_offset;
 635
 636         uspi = NULL;
 637         ubh = NULL;
 638         flags = 0;
 639
 640         UFSD("ENTER\n");
 641
 642         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 643         if (!sbi)
 644                 goto failed_nomem;
 645         sb->s_fs_info = sbi;
 646
 647         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 648
 649 #ifndef CONFIG_UFS_FS_WRITE
 650         if (!(sb->s_flags & MS_RDONLY)) {
 651                 printk("ufs was compiled with read-only support, "
 652                 "can't be mounted as read-write\n");
 653                 goto failed;
 654         }
 655 #endif
 656         /*
 657          * Set default mount options
 658          * Parse mount options
 659          */
 660         sbi->s_mount_opt = 0;
 661         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 662         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 663                 printk("wrong mount options\n");
 664                 goto failed;
 665         }
 666         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 667                 if (!silent)
 668                         printk("You didn't specify the type of your ufs filesystem\n\n"
 669                         "mount -t ufs -o ufstype="
 670                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 671                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 672                         "default is ufstype=old\n");
 673                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 674         }
 675
 676         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 677         sbi->s_uspi = uspi;
 678         if (!uspi)
 679                 goto failed;
 680         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 681         super_block_offset=UFS_SBLOCK;
 682
 683         /* Keep 2Gig file limit. Some UFS variants need to override
 684            this but as I don't know which I'll let those in the know loosen
 685            the rules */
 686         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 687         case UFS_MOUNT_UFSTYPE_44BSD:
 688                 UFSD("ufstype=44bsd\n");
 689                 uspi->s_fsize = block_size = 512;
 690                 uspi->s_fmask = ~(512 - 1);
 691                 uspi->s_fshift = 9;
 692                 uspi->s_sbsize = super_block_size = 1536;
 693                 uspi->s_sbbase = 0;
 694                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 695                 break;
 696         case UFS_MOUNT_UFSTYPE_UFS2:
 697                 UFSD("ufstype=ufs2\n");
 698                 super_block_offset=SBLOCK_UFS2;
 699                 uspi->s_fsize = block_size = 512;
 700                 uspi->s_fmask = ~(512 - 1);
 701                 uspi->s_fshift = 9;
 702                 uspi->s_sbsize = super_block_size = 1536;
 703                 uspi->s_sbbase =  0;
 704                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 705                 break;
 706
 707         case UFS_MOUNT_UFSTYPE_SUN:
 708                 UFSD("ufstype=sun\n");
 709                 uspi->s_fsize = block_size = 1024;
 710                 uspi->s_fmask = ~(1024 - 1);
 711                 uspi->s_fshift = 10;
 712                 uspi->s_sbsize = super_block_size = 2048;
 713                 uspi->s_sbbase = 0;
 714                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 715                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 716                 break;
 717
 718         case UFS_MOUNT_UFSTYPE_SUNOS:
 719                 UFSD(("ufstype=sunos\n"))
 720                 uspi->s_fsize = block_size = 1024;
 721                 uspi->s_fmask = ~(1024 - 1);
 722                 uspi->s_fshift = 10;
 723                 uspi->s_sbsize = 2048;
 724                 super_block_size = 2048;
 725                 uspi->s_sbbase = 0;
 726                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 727                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 728                 break;
 729
 730         case UFS_MOUNT_UFSTYPE_SUNx86:
 731                 UFSD("ufstype=sunx86\n");
 732                 uspi->s_fsize = block_size = 1024;
 733                 uspi->s_fmask = ~(1024 - 1);
 734                 uspi->s_fshift = 10;
 735                 uspi->s_sbsize = super_block_size = 2048;
 736                 uspi->s_sbbase = 0;
 737                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 738                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 739                 break;
 740
 741         case UFS_MOUNT_UFSTYPE_OLD:
 742                 UFSD("ufstype=old\n");
 743                 uspi->s_fsize = block_size = 1024;
 744                 uspi->s_fmask = ~(1024 - 1);
 745                 uspi->s_fshift = 10;
 746                 uspi->s_sbsize = super_block_size = 2048;
 747                 uspi->s_sbbase = 0;
 748                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 749                 if (!(sb->s_flags & MS_RDONLY)) {
 750                         if (!silent)
 751                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 752                         sb->s_flags |= MS_RDONLY;
 753                 }
 754                 break;
 755
 756         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 757                 /*TODO: check may be we need set special dir block size?*/
 758                 UFSD("ufstype=nextstep\n");
 759                 uspi->s_fsize = block_size = 1024;
 760                 uspi->s_fmask = ~(1024 - 1);
 761                 uspi->s_fshift = 10;
 762                 uspi->s_sbsize = super_block_size = 2048;
 763                 uspi->s_sbbase = 0;
 764                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 765                 if (!(sb->s_flags & MS_RDONLY)) {
 766                         if (!silent)
 767                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 768                         sb->s_flags |= MS_RDONLY;
 769                 }
 770                 break;
 771
 772         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 773                 /*TODO: check may be we need set special dir block size?*/
 774                 UFSD("ufstype=nextstep-cd\n");
 775                 uspi->s_fsize = block_size = 2048;
 776                 uspi->s_fmask = ~(2048 - 1);
 777                 uspi->s_fshift = 11;
 778                 uspi->s_sbsize = super_block_size = 2048;
 779                 uspi->s_sbbase = 0;
 780                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 781                 if (!(sb->s_flags & MS_RDONLY)) {
 782                         if (!silent)
 783                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 784                         sb->s_flags |= MS_RDONLY;
 785                 }
 786                 break;
 787
 788         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 789                 UFSD("ufstype=openstep\n");
 790                 uspi->s_fsize = block_size = 1024;
 791                 uspi->s_fmask = ~(1024 - 1);
 792                 uspi->s_fshift = 10;
 793                 uspi->s_sbsize = super_block_size = 2048;
 794                 uspi->s_sbbase = 0;
 795                 uspi->s_dirblksize = 1024;
 796                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 797                 if (!(sb->s_flags & MS_RDONLY)) {
 798                         if (!silent)
 799                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 800                         sb->s_flags |= MS_RDONLY;
 801                 }
 802                 break;
 803
 804         case UFS_MOUNT_UFSTYPE_HP:
 805                 UFSD("ufstype=hp\n");
 806                 uspi->s_fsize = block_size = 1024;
 807                 uspi->s_fmask = ~(1024 - 1);
 808                 uspi->s_fshift = 10;
 809                 uspi->s_sbsize = super_block_size = 2048;
 810                 uspi->s_sbbase = 0;
 811                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 812                 if (!(sb->s_flags & MS_RDONLY)) {
 813                         if (!silent)
 814                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 815                         sb->s_flags |= MS_RDONLY;
 816                 }
 817                 break;
 818         default:
 819                 if (!silent)
 820                         printk("unknown ufstype\n");
 821                 goto failed;
 822         }
 823
 824 again:
 825         if (!sb_set_blocksize(sb, block_size)) {
 826                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 827                 goto failed;
 828         }
 829
 830         /*
 831          * read ufs super block from device
 832          */
 833
 834         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 835
 836         if (!ubh)
 837             goto failed;
 838
 839         usb1 = ubh_get_usb_first(uspi);
 840         usb2 = ubh_get_usb_second(uspi);
 841         usb3 = ubh_get_usb_third(uspi);
 842
 843         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 844         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 845         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 846             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 847                 flags &= ~UFS_ST_MASK;
 848                 flags |=  UFS_ST_SUN;
 849         }
 850
 851         /*
 852          * Check ufs magic number
 853          */
 854         sbi->s_bytesex = BYTESEX_LE;
 855         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 856                 case UFS_MAGIC:
 857                 case UFS2_MAGIC:
 858                 case UFS_MAGIC_LFN:
 859                 case UFS_MAGIC_FEA:
 860                 case UFS_MAGIC_4GB:
 861                         goto magic_found;
 862         }
 863         sbi->s_bytesex = BYTESEX_BE;
 864         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 865                 case UFS_MAGIC:
 866                 case UFS2_MAGIC:
 867                 case UFS_MAGIC_LFN:
 868                 case UFS_MAGIC_FEA:
 869                 case UFS_MAGIC_4GB:
 870                         goto magic_found;
 871         }
 872
 873         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 874           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 875           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 876           && uspi->s_sbbase < 256) {
 877                 ubh_brelse_uspi(uspi);
 878                 ubh = NULL;
 879                 uspi->s_sbbase += 8;
 880                 goto again;
 881         }
 882         if (!silent)
 883                 printk("ufs_read_super: bad magic number\n");
 884         goto failed;
 885
 886 magic_found:
 887         /*
 888          * Check block and fragment sizes
 889          */
 890         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 891         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 892         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 893         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 894         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 895
 896         if (!is_power_of_2(uspi->s_fsize)) {
 897                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 898                         uspi->s_fsize);
 899                         goto failed;
 900         }
 901         if (uspi->s_fsize < 512) {
 902                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 903                         uspi->s_fsize);
 904                 goto failed;
 905         }
 906         if (uspi->s_fsize > 4096) {
 907                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 908                         uspi->s_fsize);
 909                 goto failed;
 910         }
 911         if (!is_power_of_2(uspi->s_bsize)) {
 912                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 913                         uspi->s_bsize);
 914                 goto failed;
 915         }
 916         if (uspi->s_bsize < 4096) {
 917                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 918                         uspi->s_bsize);
 919                 goto failed;
 920         }
 921         if (uspi->s_bsize / uspi->s_fsize > 8) {
 922                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 923                         uspi->s_bsize / uspi->s_fsize);
 924                 goto failed;
 925         }
 926         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 927                 ubh_brelse_uspi(uspi);
 928                 ubh = NULL;
 929                 block_size = uspi->s_fsize;
 930                 super_block_size = uspi->s_sbsize;
 931                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 932                 goto again;
 933         }
 934
 935         sbi->s_flags = flags;/*after that line some functions use s_flags*/
 936         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 937
 938         /*
 939          * Check, if file system was correctly unmounted.
 940          * If not, make it read only.
 941          */
 942         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 943           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 944           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 945             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 946           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 947           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 948                 switch(usb1->fs_clean) {
 949                 case UFS_FSCLEAN:
 950                         UFSD("fs is clean\n");
 951                         break;
 952                 case UFS_FSSTABLE:
 953                         UFSD("fs is stable\n");
 954                         break;
 955                 case UFS_FSOSF1:
 956                         UFSD("fs is DEC OSF/1\n");
 957                         break;
 958                 case UFS_FSACTIVE:
 959                         printk("ufs_read_super: fs is active\n");
 960                         sb->s_flags |= MS_RDONLY;
 961                         break;
 962                 case UFS_FSBAD:
 963                         printk("ufs_read_super: fs is bad\n");
 964                         sb->s_flags |= MS_RDONLY;
 965                         break;
 966                 default:
 967                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 968                         sb->s_flags |= MS_RDONLY;
 969                         break;
 970                 }
 971         } else {
 972                 printk("ufs_read_super: fs needs fsck\n");
 973                 sb->s_flags |= MS_RDONLY;
 974         }
 975
 976         /*
 977          * Read ufs_super_block into internal data structures
 978          */
 979         sb->s_op = &ufs_super_ops;
 980         sb->dq_op = NULL; /***/
 981         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 982
 983         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 984         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 985         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 986         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 987         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 988         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 989
 990         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 991                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 992                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 993         } else {
 994                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 995                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 996         }
 997
 998         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 999         /* s_bsize already set */
1000         /* s_fsize already set */
1001         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1002         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1003         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1004         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1005         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1006         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1007         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1008                 uspi->s_fshift);
1009         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1010         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1011         /* s_sbsize already set */
1012         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1013         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1014         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1015         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1016         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1017         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1018         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1019         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1020
1021         if (uspi->fs_magic == UFS2_MAGIC)
1022                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1023         else
1024                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1025
1026         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1027         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1028         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1029         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1030         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1031         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1032         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1033         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1034         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1035         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1036         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1037         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1038         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1039         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1040
1041         /*
1042          * Compute another frequently used values
1043          */
1044         uspi->s_fpbmask = uspi->s_fpb - 1;
1045         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1046                 uspi->s_apbshift = uspi->s_bshift - 3;
1047         else
1048                 uspi->s_apbshift = uspi->s_bshift - 2;
1049
1050         uspi->s_2apbshift = uspi->s_apbshift * 2;
1051         uspi->s_3apbshift = uspi->s_apbshift * 3;
1052         uspi->s_apb = 1 << uspi->s_apbshift;
1053         uspi->s_2apb = 1 << uspi->s_2apbshift;
1054         uspi->s_3apb = 1 << uspi->s_3apbshift;
1055         uspi->s_apbmask = uspi->s_apb - 1;
1056         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1057         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1058         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1059         uspi->s_bpf = uspi->s_fsize << 3;
1060         uspi->s_bpfshift = uspi->s_fshift + 3;
1061         uspi->s_bpfmask = uspi->s_bpf - 1;
1062         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1063             UFS_MOUNT_UFSTYPE_44BSD)
1064                 uspi->s_maxsymlinklen =
1065                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1066
1067         inode = iget(sb, UFS_ROOTINO);
1068         if (!inode || is_bad_inode(inode))
1069                 goto failed;
1070         sb->s_root = d_alloc_root(inode);
1071         if (!sb->s_root)
1072                 goto dalloc_failed;
1073
1074         ufs_setup_cstotal(sb);
1075         /*
1076          * Read cylinder group structures
1077          */
1078         if (!(sb->s_flags & MS_RDONLY))
1079                 if (!ufs_read_cylinder_structures(sb))
1080                         goto failed;
1081
1082         UFSD("EXIT\n");
1083         return 0;
1084
1085 dalloc_failed:
1086         iput(inode);
1087 failed:
1088         if (ubh)
1089                 ubh_brelse_uspi (uspi);
1090         kfree (uspi);
1091         kfree(sbi);
1092         sb->s_fs_info = NULL;
1093         UFSD("EXIT (FAILED)\n");
1094         return -EINVAL;
1095
1096 failed_nomem:
1097         UFSD("EXIT (NOMEM)\n");
1098         return -ENOMEM;
1099 }
1100
1101 static void ufs_write_super(struct super_block *sb)
1102 {
1103         struct ufs_sb_private_info * uspi;
1104         struct ufs_super_block_first * usb1;
1105         struct ufs_super_block_third * usb3;
1106         unsigned flags;
1107
1108         lock_kernel();
1109         UFSD("ENTER\n");
1110         flags = UFS_SB(sb)->s_flags;
1111         uspi = UFS_SB(sb)->s_uspi;
1112         usb1 = ubh_get_usb_first(uspi);
1113         usb3 = ubh_get_usb_third(uspi);
1114
1115         if (!(sb->s_flags & MS_RDONLY)) {
1116                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1117                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1118                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1119                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1120                         ufs_set_fs_state(sb, usb1, usb3,
1121                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1122                 ufs_put_cstotal(sb);
1123         }
1124         sb->s_dirt = 0;
1125         UFSD("EXIT\n");
1126         unlock_kernel();
1127 }
1128
1129 static void ufs_put_super(struct super_block *sb)
1130 {
1131         struct ufs_sb_info * sbi = UFS_SB(sb);
1132
1133         UFSD("ENTER\n");
1134
1135         if (!(sb->s_flags & MS_RDONLY))
1136                 ufs_put_super_internal(sb);
1137
1138         ubh_brelse_uspi (sbi->s_uspi);
1139         kfree (sbi->s_uspi);
1140         kfree (sbi);
1141         sb->s_fs_info = NULL;
1142         UFSD("EXIT\n");
1143         return;
1144 }
1145
1146
1147 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1148 {
1149         struct ufs_sb_private_info * uspi;
1150         struct ufs_super_block_first * usb1;
1151         struct ufs_super_block_third * usb3;
1152         unsigned new_mount_opt, ufstype;
1153         unsigned flags;
1154
1155         uspi = UFS_SB(sb)->s_uspi;
1156         flags = UFS_SB(sb)->s_flags;
1157         usb1 = ubh_get_usb_first(uspi);
1158         usb3 = ubh_get_usb_third(uspi);
1159
1160         /*
1161          * Allow the "check" option to be passed as a remount option.
1162          * It is not possible to change ufstype option during remount
1163          */
1164         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1165         new_mount_opt = 0;
1166         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1167         if (!ufs_parse_options (data, &new_mount_opt))
1168                 return -EINVAL;
1169         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1170                 new_mount_opt |= ufstype;
1171         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1172                 printk("ufstype can't be changed during remount\n");
1173                 return -EINVAL;
1174         }
1175
1176         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1177                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1178                 return 0;
1179         }
1180
1181         /*
1182          * fs was mouted as rw, remounting ro
1183          */
1184         if (*mount_flags & MS_RDONLY) {
1185                 ufs_put_super_internal(sb);
1186                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1187                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1188                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1189                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1190                         ufs_set_fs_state(sb, usb1, usb3,
1191                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1192                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1193                 sb->s_dirt = 0;
1194                 sb->s_flags |= MS_RDONLY;
1195         } else {
1196         /*
1197          * fs was mounted as ro, remounting rw
1198          */
1199 #ifndef CONFIG_UFS_FS_WRITE
1200                 printk("ufs was compiled with read-only support, "
1201                 "can't be mounted as read-write\n");
1202                 return -EINVAL;
1203 #else
1204                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1205                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1206                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1207                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1208                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1209                         printk("this ufstype is read-only supported\n");
1210                         return -EINVAL;
1211                 }
1212                 if (!ufs_read_cylinder_structures(sb)) {
1213                         printk("failed during remounting\n");
1214                         return -EPERM;
1215                 }
1216                 sb->s_flags &= ~MS_RDONLY;
1217 #endif
1218         }
1219         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1220         return 0;
1221 }
1222
1223 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1224 {
1225         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1226         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1227         struct match_token *tp = tokens;
1228
1229         while (tp->token != Opt_onerror_panic && tp->token != mval)
1230                 ++tp;
1231         BUG_ON(tp->token == Opt_onerror_panic);
1232         seq_printf(seq, ",%s", tp->pattern);
1233
1234         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1235         while (tp->token != Opt_err && tp->token != mval)
1236                 ++tp;
1237         BUG_ON(tp->token == Opt_err);
1238         seq_printf(seq, ",%s", tp->pattern);
1239
1240         return 0;
1241 }
1242
1243 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1244 {
1245         struct super_block *sb = dentry->d_sb;
1246         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1247         unsigned  flags = UFS_SB(sb)->s_flags;
1248         struct ufs_super_block_first *usb1;
1249         struct ufs_super_block_second *usb2;
1250         struct ufs_super_block_third *usb3;
1251
1252         lock_kernel();
1253
1254         usb1 = ubh_get_usb_first(uspi);
1255         usb2 = ubh_get_usb_second(uspi);
1256         usb3 = ubh_get_usb_third(uspi);
1257
1258         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1259                 buf->f_type = UFS2_MAGIC;
1260                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1261         } else {
1262                 buf->f_type = UFS_MAGIC;
1263                 buf->f_blocks = uspi->s_dsize;
1264         }
1265         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1266                 uspi->cs_total.cs_nffree;
1267         buf->f_ffree = uspi->cs_total.cs_nifree;
1268         buf->f_bsize = sb->s_blocksize;
1269         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1270                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1271         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1272         buf->f_namelen = UFS_MAXNAMLEN;
1273
1274         unlock_kernel();
1275
1276         return 0;
1277 }
1278
1279 static struct kmem_cache * ufs_inode_cachep;
1280
1281 static struct inode *ufs_alloc_inode(struct super_block *sb)
1282 {
1283         struct ufs_inode_info *ei;
1284         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1285         if (!ei)
1286                 return NULL;
1287         ei->vfs_inode.i_version = 1;
1288         return &ei->vfs_inode;
1289 }
1290
1291 static void ufs_destroy_inode(struct inode *inode)
1292 {
1293         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1294 }
1295
1296 static void init_once(struct kmem_cache * cachep, void *foo)
1297 {
1298         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1299
1300         inode_init_once(&ei->vfs_inode);
1301 }
1302
1303 static int init_inodecache(void)
1304 {
1305         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1306                                              sizeof(struct ufs_inode_info),
1307                                              0, (SLAB_RECLAIM_ACCOUNT|
1308                                                 SLAB_MEM_SPREAD),
1309                                              init_once);
1310         if (ufs_inode_cachep == NULL)
1311                 return -ENOMEM;
1312         return 0;
1313 }
1314
1315 static void destroy_inodecache(void)
1316 {
1317         kmem_cache_destroy(ufs_inode_cachep);
1318 }
1319
1320 #ifdef CONFIG_QUOTA
1321 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1322 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1323 #endif
1324
1325 static const struct super_operations ufs_super_ops = {
1326         .alloc_inode    = ufs_alloc_inode,
1327         .destroy_inode  = ufs_destroy_inode,
1328         .read_inode     = ufs_read_inode,
1329         .write_inode    = ufs_write_inode,
1330         .delete_inode   = ufs_delete_inode,
1331         .put_super      = ufs_put_super,
1332         .write_super    = ufs_write_super,
1333         .statfs         = ufs_statfs,
1334         .remount_fs     = ufs_remount,
1335         .show_options   = ufs_show_options,
1336 #ifdef CONFIG_QUOTA
1337         .quota_read     = ufs_quota_read,
1338         .quota_write    = ufs_quota_write,
1339 #endif
1340 };
1341
1342 #ifdef CONFIG_QUOTA
1343
1344 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1345  * acquiring the locks... As quota files are never truncated and quota code
1346  * itself serializes the operations (and noone else should touch the files)
1347  * we don't have to be afraid of races */
1348 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1349                                size_t len, loff_t off)
1350 {
1351         struct inode *inode = sb_dqopt(sb)->files[type];
1352         sector_t blk = off >> sb->s_blocksize_bits;
1353         int err = 0;
1354         int offset = off & (sb->s_blocksize - 1);
1355         int tocopy;
1356         size_t toread;
1357         struct buffer_head *bh;
1358         loff_t i_size = i_size_read(inode);
1359
1360         if (off > i_size)
1361                 return 0;
1362         if (off+len > i_size)
1363                 len = i_size-off;
1364         toread = len;
1365         while (toread > 0) {
1366                 tocopy = sb->s_blocksize - offset < toread ?
1367                                 sb->s_blocksize - offset : toread;
1368
1369                 bh = ufs_bread(inode, blk, 0, &err);
1370                 if (err)
1371                         return err;
1372                 if (!bh)        /* A hole? */
1373                         memset(data, 0, tocopy);
1374                 else {
1375                         memcpy(data, bh->b_data+offset, tocopy);
1376                         brelse(bh);
1377                 }
1378                 offset = 0;
1379                 toread -= tocopy;
1380                 data += tocopy;
1381                 blk++;
1382         }
1383         return len;
1384 }
1385
1386 /* Write to quotafile */
1387 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1388                                 const char *data, size_t len, loff_t off)
1389 {
1390         struct inode *inode = sb_dqopt(sb)->files[type];
1391         sector_t blk = off >> sb->s_blocksize_bits;
1392         int err = 0;
1393         int offset = off & (sb->s_blocksize - 1);
1394         int tocopy;
1395         size_t towrite = len;
1396         struct buffer_head *bh;
1397
1398         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1399         while (towrite > 0) {
1400                 tocopy = sb->s_blocksize - offset < towrite ?
1401                                 sb->s_blocksize - offset : towrite;
1402
1403                 bh = ufs_bread(inode, blk, 1, &err);
1404                 if (!bh)
1405                         goto out;
1406                 lock_buffer(bh);
1407                 memcpy(bh->b_data+offset, data, tocopy);
1408                 flush_dcache_page(bh->b_page);
1409                 set_buffer_uptodate(bh);
1410                 mark_buffer_dirty(bh);
1411                 unlock_buffer(bh);
1412                 brelse(bh);
1413                 offset = 0;
1414                 towrite -= tocopy;
1415                 data += tocopy;
1416                 blk++;
1417         }
1418 out:
1419         if (len == towrite) {
1420                 mutex_unlock(&inode->i_mutex);
1421                 return err;
1422         }
1423         if (inode->i_size < off+len-towrite)
1424                 i_size_write(inode, off+len-towrite);
1425         inode->i_version++;
1426         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1427         mark_inode_dirty(inode);
1428         mutex_unlock(&inode->i_mutex);
1429         return len - towrite;
1430 }
1431
1432 #endif
1433
1434 static int ufs_get_sb(struct file_system_type *fs_type,
1435         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1436 {
1437         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1438 }
1439
1440 static struct file_system_type ufs_fs_type = {
1441         .owner          = THIS_MODULE,
1442         .name           = "ufs",
1443         .get_sb         = ufs_get_sb,
1444         .kill_sb        = kill_block_super,
1445         .fs_flags       = FS_REQUIRES_DEV,
1446 };
1447
1448 static int __init init_ufs_fs(void)
1449 {
1450         int err = init_inodecache();
1451         if (err)
1452                 goto out1;
1453         err = register_filesystem(&ufs_fs_type);
1454         if (err)
1455                 goto out;
1456         return 0;
1457 out:
1458         destroy_inodecache();
1459 out1:
1460         return err;
1461 }
1462
1463 static void __exit exit_ufs_fs(void)
1464 {
1465         unregister_filesystem(&ufs_fs_type);
1466         destroy_inodecache();
1467 }
1468
1469 module_init(init_ufs_fs)
1470 module_exit(exit_ufs_fs)
1471 MODULE_LICENSE("GPL");