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   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <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
 598         lock_kernel();
 599
 600         ufs_put_cstotal(sb);
 601         size = uspi->s_cssize;
 602         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 603         base = space = (char*) sbi->s_csp;
 604         for (i = 0; i < blks; i += uspi->s_fpb) {
 605                 size = uspi->s_bsize;
 606                 if (i + uspi->s_fpb > blks)
 607                         size = (blks - i) * uspi->s_fsize;
 608
 609                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 610
 611                 ubh_memcpyubh (ubh, space, size);
 612                 space += size;
 613                 ubh_mark_buffer_uptodate (ubh, 1);
 614                 ubh_mark_buffer_dirty (ubh);
 615                 ubh_brelse (ubh);
 616         }
 617         for (i = 0; i < sbi->s_cg_loaded; i++) {
 618                 ufs_put_cylinder (sb, i);
 619                 kfree (sbi->s_ucpi[i]);
 620         }
 621         for (; i < UFS_MAX_GROUP_LOADED; i++)
 622                 kfree (sbi->s_ucpi[i]);
 623         for (i = 0; i < uspi->s_ncg; i++)
 624                 brelse (sbi->s_ucg[i]);
 625         kfree (sbi->s_ucg);
 626         kfree (base);
 627
 628         unlock_kernel();
 629
 630         UFSD("EXIT\n");
 631 }
 632
 633 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 634 {
 635         struct ufs_sb_info * sbi;
 636         struct ufs_sb_private_info * uspi;
 637         struct ufs_super_block_first * usb1;
 638         struct ufs_super_block_second * usb2;
 639         struct ufs_super_block_third * usb3;
 640         struct ufs_buffer_head * ubh;
 641         struct inode *inode;
 642         unsigned block_size, super_block_size;
 643         unsigned flags;
 644         unsigned super_block_offset;
 645         unsigned maxsymlen;
 646         int ret = -EINVAL;
 647
 648         uspi = NULL;
 649         ubh = NULL;
 650         flags = 0;
 651
 652         UFSD("ENTER\n");
 653
 654         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 655         if (!sbi)
 656                 goto failed_nomem;
 657         sb->s_fs_info = sbi;
 658
 659         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 660
 661 #ifndef CONFIG_UFS_FS_WRITE
 662         if (!(sb->s_flags & MS_RDONLY)) {
 663                 printk("ufs was compiled with read-only support, "
 664                 "can't be mounted as read-write\n");
 665                 goto failed;
 666         }
 667 #endif
 668         /*
 669          * Set default mount options
 670          * Parse mount options
 671          */
 672         sbi->s_mount_opt = 0;
 673         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 674         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 675                 printk("wrong mount options\n");
 676                 goto failed;
 677         }
 678         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 679                 if (!silent)
 680                         printk("You didn't specify the type of your ufs filesystem\n\n"
 681                         "mount -t ufs -o ufstype="
 682                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 683                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 684                         "default is ufstype=old\n");
 685                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 686         }
 687
 688         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 689         sbi->s_uspi = uspi;
 690         if (!uspi)
 691                 goto failed;
 692         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 693         super_block_offset=UFS_SBLOCK;
 694
 695         /* Keep 2Gig file limit. Some UFS variants need to override
 696            this but as I don't know which I'll let those in the know loosen
 697            the rules */
 698         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 699         case UFS_MOUNT_UFSTYPE_44BSD:
 700                 UFSD("ufstype=44bsd\n");
 701                 uspi->s_fsize = block_size = 512;
 702                 uspi->s_fmask = ~(512 - 1);
 703                 uspi->s_fshift = 9;
 704                 uspi->s_sbsize = super_block_size = 1536;
 705                 uspi->s_sbbase = 0;
 706                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 707                 break;
 708         case UFS_MOUNT_UFSTYPE_UFS2:
 709                 UFSD("ufstype=ufs2\n");
 710                 super_block_offset=SBLOCK_UFS2;
 711                 uspi->s_fsize = block_size = 512;
 712                 uspi->s_fmask = ~(512 - 1);
 713                 uspi->s_fshift = 9;
 714                 uspi->s_sbsize = super_block_size = 1536;
 715                 uspi->s_sbbase =  0;
 716                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 717                 break;
 718
 719         case UFS_MOUNT_UFSTYPE_SUN:
 720                 UFSD("ufstype=sun\n");
 721                 uspi->s_fsize = block_size = 1024;
 722                 uspi->s_fmask = ~(1024 - 1);
 723                 uspi->s_fshift = 10;
 724                 uspi->s_sbsize = 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_EFT | UFS_ST_SUN | UFS_CG_SUN;
 728                 break;
 729
 730         case UFS_MOUNT_UFSTYPE_SUNOS:
 731                 UFSD(("ufstype=sunos\n"))
 732                 uspi->s_fsize = block_size = 1024;
 733                 uspi->s_fmask = ~(1024 - 1);
 734                 uspi->s_fshift = 10;
 735                 uspi->s_sbsize = 2048;
 736                 super_block_size = 2048;
 737                 uspi->s_sbbase = 0;
 738                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 739                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 740                 break;
 741
 742         case UFS_MOUNT_UFSTYPE_SUNx86:
 743                 UFSD("ufstype=sunx86\n");
 744                 uspi->s_fsize = block_size = 1024;
 745                 uspi->s_fmask = ~(1024 - 1);
 746                 uspi->s_fshift = 10;
 747                 uspi->s_sbsize = super_block_size = 2048;
 748                 uspi->s_sbbase = 0;
 749                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 750                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 751                 break;
 752
 753         case UFS_MOUNT_UFSTYPE_OLD:
 754                 UFSD("ufstype=old\n");
 755                 uspi->s_fsize = block_size = 1024;
 756                 uspi->s_fmask = ~(1024 - 1);
 757                 uspi->s_fshift = 10;
 758                 uspi->s_sbsize = super_block_size = 2048;
 759                 uspi->s_sbbase = 0;
 760                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 761                 if (!(sb->s_flags & MS_RDONLY)) {
 762                         if (!silent)
 763                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 764                         sb->s_flags |= MS_RDONLY;
 765                 }
 766                 break;
 767
 768         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 769                 UFSD("ufstype=nextstep\n");
 770                 uspi->s_fsize = block_size = 1024;
 771                 uspi->s_fmask = ~(1024 - 1);
 772                 uspi->s_fshift = 10;
 773                 uspi->s_sbsize = super_block_size = 2048;
 774                 uspi->s_sbbase = 0;
 775                 uspi->s_dirblksize = 1024;
 776                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 777                 if (!(sb->s_flags & MS_RDONLY)) {
 778                         if (!silent)
 779                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 780                         sb->s_flags |= MS_RDONLY;
 781                 }
 782                 break;
 783
 784         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 785                 UFSD("ufstype=nextstep-cd\n");
 786                 uspi->s_fsize = block_size = 2048;
 787                 uspi->s_fmask = ~(2048 - 1);
 788                 uspi->s_fshift = 11;
 789                 uspi->s_sbsize = super_block_size = 2048;
 790                 uspi->s_sbbase = 0;
 791                 uspi->s_dirblksize = 1024;
 792                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 793                 if (!(sb->s_flags & MS_RDONLY)) {
 794                         if (!silent)
 795                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 796                         sb->s_flags |= MS_RDONLY;
 797                 }
 798                 break;
 799
 800         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 801                 UFSD("ufstype=openstep\n");
 802                 uspi->s_fsize = block_size = 1024;
 803                 uspi->s_fmask = ~(1024 - 1);
 804                 uspi->s_fshift = 10;
 805                 uspi->s_sbsize = super_block_size = 2048;
 806                 uspi->s_sbbase = 0;
 807                 uspi->s_dirblksize = 1024;
 808                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 809                 if (!(sb->s_flags & MS_RDONLY)) {
 810                         if (!silent)
 811                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 812                         sb->s_flags |= MS_RDONLY;
 813                 }
 814                 break;
 815
 816         case UFS_MOUNT_UFSTYPE_HP:
 817                 UFSD("ufstype=hp\n");
 818                 uspi->s_fsize = block_size = 1024;
 819                 uspi->s_fmask = ~(1024 - 1);
 820                 uspi->s_fshift = 10;
 821                 uspi->s_sbsize = super_block_size = 2048;
 822                 uspi->s_sbbase = 0;
 823                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 824                 if (!(sb->s_flags & MS_RDONLY)) {
 825                         if (!silent)
 826                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 827                         sb->s_flags |= MS_RDONLY;
 828                 }
 829                 break;
 830         default:
 831                 if (!silent)
 832                         printk("unknown ufstype\n");
 833                 goto failed;
 834         }
 835
 836 again:
 837         if (!sb_set_blocksize(sb, block_size)) {
 838                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 839                 goto failed;
 840         }
 841
 842         /*
 843          * read ufs super block from device
 844          */
 845
 846         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 847
 848         if (!ubh)
 849             goto failed;
 850
 851         usb1 = ubh_get_usb_first(uspi);
 852         usb2 = ubh_get_usb_second(uspi);
 853         usb3 = ubh_get_usb_third(uspi);
 854
 855         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 856         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 857         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 858             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 859                 flags &= ~UFS_ST_MASK;
 860                 flags |=  UFS_ST_SUN;
 861         }
 862
 863         /*
 864          * Check ufs magic number
 865          */
 866         sbi->s_bytesex = BYTESEX_LE;
 867         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 868                 case UFS_MAGIC:
 869                 case UFS2_MAGIC:
 870                 case UFS_MAGIC_LFN:
 871                 case UFS_MAGIC_FEA:
 872                 case UFS_MAGIC_4GB:
 873                         goto magic_found;
 874         }
 875         sbi->s_bytesex = BYTESEX_BE;
 876         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 877                 case UFS_MAGIC:
 878                 case UFS2_MAGIC:
 879                 case UFS_MAGIC_LFN:
 880                 case UFS_MAGIC_FEA:
 881                 case UFS_MAGIC_4GB:
 882                         goto magic_found;
 883         }
 884
 885         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 886           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 887           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 888           && uspi->s_sbbase < 256) {
 889                 ubh_brelse_uspi(uspi);
 890                 ubh = NULL;
 891                 uspi->s_sbbase += 8;
 892                 goto again;
 893         }
 894         if (!silent)
 895                 printk("ufs_read_super: bad magic number\n");
 896         goto failed;
 897
 898 magic_found:
 899         /*
 900          * Check block and fragment sizes
 901          */
 902         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 903         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 904         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 905         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 906         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 907
 908         if (!is_power_of_2(uspi->s_fsize)) {
 909                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 910                         uspi->s_fsize);
 911                         goto failed;
 912         }
 913         if (uspi->s_fsize < 512) {
 914                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 915                         uspi->s_fsize);
 916                 goto failed;
 917         }
 918         if (uspi->s_fsize > 4096) {
 919                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 920                         uspi->s_fsize);
 921                 goto failed;
 922         }
 923         if (!is_power_of_2(uspi->s_bsize)) {
 924                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 925                         uspi->s_bsize);
 926                 goto failed;
 927         }
 928         if (uspi->s_bsize < 4096) {
 929                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 930                         uspi->s_bsize);
 931                 goto failed;
 932         }
 933         if (uspi->s_bsize / uspi->s_fsize > 8) {
 934                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 935                         uspi->s_bsize / uspi->s_fsize);
 936                 goto failed;
 937         }
 938         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 939                 ubh_brelse_uspi(uspi);
 940                 ubh = NULL;
 941                 block_size = uspi->s_fsize;
 942                 super_block_size = uspi->s_sbsize;
 943                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 944                 goto again;
 945         }
 946
 947         sbi->s_flags = flags;/*after that line some functions use s_flags*/
 948         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 949
 950         /*
 951          * Check, if file system was correctly unmounted.
 952          * If not, make it read only.
 953          */
 954         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 955           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 956           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 957             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
 958           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 959           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 960                 switch(usb1->fs_clean) {
 961                 case UFS_FSCLEAN:
 962                         UFSD("fs is clean\n");
 963                         break;
 964                 case UFS_FSSTABLE:
 965                         UFSD("fs is stable\n");
 966                         break;
 967                 case UFS_FSOSF1:
 968                         UFSD("fs is DEC OSF/1\n");
 969                         break;
 970                 case UFS_FSACTIVE:
 971                         printk("ufs_read_super: fs is active\n");
 972                         sb->s_flags |= MS_RDONLY;
 973                         break;
 974                 case UFS_FSBAD:
 975                         printk("ufs_read_super: fs is bad\n");
 976                         sb->s_flags |= MS_RDONLY;
 977                         break;
 978                 default:
 979                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 980                         sb->s_flags |= MS_RDONLY;
 981                         break;
 982                 }
 983         } else {
 984                 printk("ufs_read_super: fs needs fsck\n");
 985                 sb->s_flags |= MS_RDONLY;
 986         }
 987
 988         /*
 989          * Read ufs_super_block into internal data structures
 990          */
 991         sb->s_op = &ufs_super_ops;
 992         sb->dq_op = NULL; /***/
 993         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 994
 995         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 996         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 997         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 998         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 999         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1000         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1001
1002         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1003                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1004                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1005         } else {
1006                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1007                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1008         }
1009
1010         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1011         /* s_bsize already set */
1012         /* s_fsize already set */
1013         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1014         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1015         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1016         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1017         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1018         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1019         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1020                 uspi->s_fshift);
1021         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1022         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1023         /* s_sbsize already set */
1024         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1025         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1026         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1027         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1028         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1029         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1030         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1031         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1032
1033         if (uspi->fs_magic == UFS2_MAGIC)
1034                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1035         else
1036                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1037
1038         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1039         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1040         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1041         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1042         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1043         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1044         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1045         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1046         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1047         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1048         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1049         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1050         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1051         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1052
1053         /*
1054          * Compute another frequently used values
1055          */
1056         uspi->s_fpbmask = uspi->s_fpb - 1;
1057         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1058                 uspi->s_apbshift = uspi->s_bshift - 3;
1059         else
1060                 uspi->s_apbshift = uspi->s_bshift - 2;
1061
1062         uspi->s_2apbshift = uspi->s_apbshift * 2;
1063         uspi->s_3apbshift = uspi->s_apbshift * 3;
1064         uspi->s_apb = 1 << uspi->s_apbshift;
1065         uspi->s_2apb = 1 << uspi->s_2apbshift;
1066         uspi->s_3apb = 1 << uspi->s_3apbshift;
1067         uspi->s_apbmask = uspi->s_apb - 1;
1068         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1069         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1070         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1071         uspi->s_bpf = uspi->s_fsize << 3;
1072         uspi->s_bpfshift = uspi->s_fshift + 3;
1073         uspi->s_bpfmask = uspi->s_bpf - 1;
1074         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1075             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1076                 uspi->s_maxsymlinklen =
1077                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1078
1079         if (uspi->fs_magic == UFS2_MAGIC)
1080                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1081         else
1082                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1083         if (uspi->s_maxsymlinklen > maxsymlen) {
1084                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1085                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1086                 uspi->s_maxsymlinklen = maxsymlen;
1087         }
1088
1089         inode = ufs_iget(sb, UFS_ROOTINO);
1090         if (IS_ERR(inode)) {
1091                 ret = PTR_ERR(inode);
1092                 goto failed;
1093         }
1094         sb->s_root = d_alloc_root(inode);
1095         if (!sb->s_root) {
1096                 ret = -ENOMEM;
1097                 goto dalloc_failed;
1098         }
1099
1100         ufs_setup_cstotal(sb);
1101         /*
1102          * Read cylinder group structures
1103          */
1104         if (!(sb->s_flags & MS_RDONLY))
1105                 if (!ufs_read_cylinder_structures(sb))
1106                         goto failed;
1107
1108         UFSD("EXIT\n");
1109         return 0;
1110
1111 dalloc_failed:
1112         iput(inode);
1113 failed:
1114         if (ubh)
1115                 ubh_brelse_uspi (uspi);
1116         kfree (uspi);
1117         kfree(sbi);
1118         sb->s_fs_info = NULL;
1119         UFSD("EXIT (FAILED)\n");
1120         return ret;
1121
1122 failed_nomem:
1123         UFSD("EXIT (NOMEM)\n");
1124         return -ENOMEM;
1125 }
1126
1127 static void ufs_write_super(struct super_block *sb)
1128 {
1129         struct ufs_sb_private_info * uspi;
1130         struct ufs_super_block_first * usb1;
1131         struct ufs_super_block_third * usb3;
1132         unsigned flags;
1133
1134         lock_kernel();
1135         UFSD("ENTER\n");
1136         flags = UFS_SB(sb)->s_flags;
1137         uspi = UFS_SB(sb)->s_uspi;
1138         usb1 = ubh_get_usb_first(uspi);
1139         usb3 = ubh_get_usb_third(uspi);
1140
1141         if (!(sb->s_flags & MS_RDONLY)) {
1142                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1143                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1144                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1145                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1146                         ufs_set_fs_state(sb, usb1, usb3,
1147                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1148                 ufs_put_cstotal(sb);
1149         }
1150         sb->s_dirt = 0;
1151         UFSD("EXIT\n");
1152         unlock_kernel();
1153 }
1154
1155 static void ufs_put_super(struct super_block *sb)
1156 {
1157         struct ufs_sb_info * sbi = UFS_SB(sb);
1158
1159         UFSD("ENTER\n");
1160
1161         if (sb->s_dirt)
1162                 ufs_write_super(sb);
1163
1164         if (!(sb->s_flags & MS_RDONLY))
1165                 ufs_put_super_internal(sb);
1166
1167         ubh_brelse_uspi (sbi->s_uspi);
1168         kfree (sbi->s_uspi);
1169         kfree (sbi);
1170         sb->s_fs_info = NULL;
1171         UFSD("EXIT\n");
1172         return;
1173 }
1174
1175
1176 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1177 {
1178         struct ufs_sb_private_info * uspi;
1179         struct ufs_super_block_first * usb1;
1180         struct ufs_super_block_third * usb3;
1181         unsigned new_mount_opt, ufstype;
1182         unsigned flags;
1183
1184         uspi = UFS_SB(sb)->s_uspi;
1185         flags = UFS_SB(sb)->s_flags;
1186         usb1 = ubh_get_usb_first(uspi);
1187         usb3 = ubh_get_usb_third(uspi);
1188
1189         /*
1190          * Allow the "check" option to be passed as a remount option.
1191          * It is not possible to change ufstype option during remount
1192          */
1193         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1194         new_mount_opt = 0;
1195         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1196         if (!ufs_parse_options (data, &new_mount_opt))
1197                 return -EINVAL;
1198         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1199                 new_mount_opt |= ufstype;
1200         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1201                 printk("ufstype can't be changed during remount\n");
1202                 return -EINVAL;
1203         }
1204
1205         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1206                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1207                 return 0;
1208         }
1209
1210         /*
1211          * fs was mouted as rw, remounting ro
1212          */
1213         if (*mount_flags & MS_RDONLY) {
1214                 ufs_put_super_internal(sb);
1215                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1216                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1217                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1218                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1219                         ufs_set_fs_state(sb, usb1, usb3,
1220                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1221                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1222                 sb->s_dirt = 0;
1223                 sb->s_flags |= MS_RDONLY;
1224         } else {
1225         /*
1226          * fs was mounted as ro, remounting rw
1227          */
1228 #ifndef CONFIG_UFS_FS_WRITE
1229                 printk("ufs was compiled with read-only support, "
1230                 "can't be mounted as read-write\n");
1231                 return -EINVAL;
1232 #else
1233                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1234                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1235                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1236                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1237                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1238                         printk("this ufstype is read-only supported\n");
1239                         return -EINVAL;
1240                 }
1241                 if (!ufs_read_cylinder_structures(sb)) {
1242                         printk("failed during remounting\n");
1243                         return -EPERM;
1244                 }
1245                 sb->s_flags &= ~MS_RDONLY;
1246 #endif
1247         }
1248         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1249         return 0;
1250 }
1251
1252 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1253 {
1254         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1255         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1256         const struct match_token *tp = tokens;
1257
1258         while (tp->token != Opt_onerror_panic && tp->token != mval)
1259                 ++tp;
1260         BUG_ON(tp->token == Opt_onerror_panic);
1261         seq_printf(seq, ",%s", tp->pattern);
1262
1263         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1264         while (tp->token != Opt_err && tp->token != mval)
1265                 ++tp;
1266         BUG_ON(tp->token == Opt_err);
1267         seq_printf(seq, ",%s", tp->pattern);
1268
1269         return 0;
1270 }
1271
1272 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1273 {
1274         struct super_block *sb = dentry->d_sb;
1275         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1276         unsigned  flags = UFS_SB(sb)->s_flags;
1277         struct ufs_super_block_first *usb1;
1278         struct ufs_super_block_second *usb2;
1279         struct ufs_super_block_third *usb3;
1280         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1281
1282         lock_kernel();
1283
1284         usb1 = ubh_get_usb_first(uspi);
1285         usb2 = ubh_get_usb_second(uspi);
1286         usb3 = ubh_get_usb_third(uspi);
1287
1288         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1289                 buf->f_type = UFS2_MAGIC;
1290                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1291         } else {
1292                 buf->f_type = UFS_MAGIC;
1293                 buf->f_blocks = uspi->s_dsize;
1294         }
1295         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1296                 uspi->cs_total.cs_nffree;
1297         buf->f_ffree = uspi->cs_total.cs_nifree;
1298         buf->f_bsize = sb->s_blocksize;
1299         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1300                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1301         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1302         buf->f_namelen = UFS_MAXNAMLEN;
1303         buf->f_fsid.val[0] = (u32)id;
1304         buf->f_fsid.val[1] = (u32)(id >> 32);
1305
1306         unlock_kernel();
1307
1308         return 0;
1309 }
1310
1311 static struct kmem_cache * ufs_inode_cachep;
1312
1313 static struct inode *ufs_alloc_inode(struct super_block *sb)
1314 {
1315         struct ufs_inode_info *ei;
1316         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1317         if (!ei)
1318                 return NULL;
1319         ei->vfs_inode.i_version = 1;
1320         return &ei->vfs_inode;
1321 }
1322
1323 static void ufs_destroy_inode(struct inode *inode)
1324 {
1325         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1326 }
1327
1328 static void init_once(void *foo)
1329 {
1330         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1331
1332         inode_init_once(&ei->vfs_inode);
1333 }
1334
1335 static int init_inodecache(void)
1336 {
1337         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1338                                              sizeof(struct ufs_inode_info),
1339                                              0, (SLAB_RECLAIM_ACCOUNT|
1340                                                 SLAB_MEM_SPREAD),
1341                                              init_once);
1342         if (ufs_inode_cachep == NULL)
1343                 return -ENOMEM;
1344         return 0;
1345 }
1346
1347 static void destroy_inodecache(void)
1348 {
1349         kmem_cache_destroy(ufs_inode_cachep);
1350 }
1351
1352 #ifdef CONFIG_QUOTA
1353 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1354 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1355 #endif
1356
1357 static const struct super_operations ufs_super_ops = {
1358         .alloc_inode    = ufs_alloc_inode,
1359         .destroy_inode  = ufs_destroy_inode,
1360         .write_inode    = ufs_write_inode,
1361         .delete_inode   = ufs_delete_inode,
1362         .put_super      = ufs_put_super,
1363         .write_super    = ufs_write_super,
1364         .statfs         = ufs_statfs,
1365         .remount_fs     = ufs_remount,
1366         .show_options   = ufs_show_options,
1367 #ifdef CONFIG_QUOTA
1368         .quota_read     = ufs_quota_read,
1369         .quota_write    = ufs_quota_write,
1370 #endif
1371 };
1372
1373 #ifdef CONFIG_QUOTA
1374
1375 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1376  * acquiring the locks... As quota files are never truncated and quota code
1377  * itself serializes the operations (and noone else should touch the files)
1378  * we don't have to be afraid of races */
1379 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1380                                size_t len, loff_t off)
1381 {
1382         struct inode *inode = sb_dqopt(sb)->files[type];
1383         sector_t blk = off >> sb->s_blocksize_bits;
1384         int err = 0;
1385         int offset = off & (sb->s_blocksize - 1);
1386         int tocopy;
1387         size_t toread;
1388         struct buffer_head *bh;
1389         loff_t i_size = i_size_read(inode);
1390
1391         if (off > i_size)
1392                 return 0;
1393         if (off+len > i_size)
1394                 len = i_size-off;
1395         toread = len;
1396         while (toread > 0) {
1397                 tocopy = sb->s_blocksize - offset < toread ?
1398                                 sb->s_blocksize - offset : toread;
1399
1400                 bh = ufs_bread(inode, blk, 0, &err);
1401                 if (err)
1402                         return err;
1403                 if (!bh)        /* A hole? */
1404                         memset(data, 0, tocopy);
1405                 else {
1406                         memcpy(data, bh->b_data+offset, tocopy);
1407                         brelse(bh);
1408                 }
1409                 offset = 0;
1410                 toread -= tocopy;
1411                 data += tocopy;
1412                 blk++;
1413         }
1414         return len;
1415 }
1416
1417 /* Write to quotafile */
1418 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1419                                 const char *data, size_t len, loff_t off)
1420 {
1421         struct inode *inode = sb_dqopt(sb)->files[type];
1422         sector_t blk = off >> sb->s_blocksize_bits;
1423         int err = 0;
1424         int offset = off & (sb->s_blocksize - 1);
1425         int tocopy;
1426         size_t towrite = len;
1427         struct buffer_head *bh;
1428
1429         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1430         while (towrite > 0) {
1431                 tocopy = sb->s_blocksize - offset < towrite ?
1432                                 sb->s_blocksize - offset : towrite;
1433
1434                 bh = ufs_bread(inode, blk, 1, &err);
1435                 if (!bh)
1436                         goto out;
1437                 lock_buffer(bh);
1438                 memcpy(bh->b_data+offset, data, tocopy);
1439                 flush_dcache_page(bh->b_page);
1440                 set_buffer_uptodate(bh);
1441                 mark_buffer_dirty(bh);
1442                 unlock_buffer(bh);
1443                 brelse(bh);
1444                 offset = 0;
1445                 towrite -= tocopy;
1446                 data += tocopy;
1447                 blk++;
1448         }
1449 out:
1450         if (len == towrite) {
1451                 mutex_unlock(&inode->i_mutex);
1452                 return err;
1453         }
1454         if (inode->i_size < off+len-towrite)
1455                 i_size_write(inode, off+len-towrite);
1456         inode->i_version++;
1457         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1458         mark_inode_dirty(inode);
1459         mutex_unlock(&inode->i_mutex);
1460         return len - towrite;
1461 }
1462
1463 #endif
1464
1465 static int ufs_get_sb(struct file_system_type *fs_type,
1466         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1467 {
1468         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1469 }
1470
1471 static struct file_system_type ufs_fs_type = {
1472         .owner          = THIS_MODULE,
1473         .name           = "ufs",
1474         .get_sb         = ufs_get_sb,
1475         .kill_sb        = kill_block_super,
1476         .fs_flags       = FS_REQUIRES_DEV,
1477 };
1478
1479 static int __init init_ufs_fs(void)
1480 {
1481         int err = init_inodecache();
1482         if (err)
1483                 goto out1;
1484         err = register_filesystem(&ufs_fs_type);
1485         if (err)
1486                 goto out;
1487         return 0;
1488 out:
1489         destroy_inodecache();
1490 out1:
1491         return err;
1492 }
1493
1494 static void __exit exit_ufs_fs(void)
1495 {
1496         unregister_filesystem(&ufs_fs_type);
1497         destroy_inodecache();
1498 }
1499
1500 module_init(init_ufs_fs)
1501 module_exit(exit_ufs_fs)
1502 MODULE_LICENSE("GPL");