git.oblomov.eu Git - linux-2.6/blob - fs/ufs/super.c

   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <gertjan@cs.vu.nl>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68
  69 #include <linux/module.h>
  70 #include <linux/bitops.h>
  71
  72 #include <stdarg.h>
  73
  74 #include <asm/uaccess.h>
  75 #include <asm/system.h>
  76
  77 #include <linux/errno.h>
  78 #include <linux/fs.h>
  79 #include <linux/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
  91 #include "swab.h"
  92 #include "util.h"
  93
  94 #ifdef CONFIG_UFS_DEBUG
  95 /*
  96  * Print contents of ufs_super_block, useful for debugging
  97  */
  98 static void ufs_print_super_stuff(struct super_block *sb,
  99                                   struct ufs_super_block_first *usb1,
 100                                   struct ufs_super_block_second *usb2,
 101                                   struct ufs_super_block_third *usb3)
 102 {
 103         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 104
 105         printk("ufs_print_super_stuff\n");
 106         printk("  magic:     0x%x\n", magic);
 107         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 108                 printk("  fs_size:   %llu\n", (unsigned long long)
 109                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 110                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 111                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 112                 printk("  bsize:         %u\n",
 113                        fs32_to_cpu(sb, usb1->fs_bsize));
 114                 printk("  fsize:         %u\n",
 115                        fs32_to_cpu(sb, usb1->fs_fsize));
 116                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 117                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 118                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 119                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 120                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 121                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 122                        (unsigned long long)
 123                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 124                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 125                        (unsigned long long)
 126                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 127                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 128                        (unsigned long long)
 129                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 130         } else {
 131                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 132                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 133                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 134                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 135                 printk(" cgoffset:    %u\n",
 136                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 137                 printk(" ~cgmask:     0x%x\n",
 138                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 139                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 140                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 141                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 142                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 143                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 144                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 145                 printk(" fragshift:   %u\n",
 146                        fs32_to_cpu(sb, usb1->fs_fragshift));
 147                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 148                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 149                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 150                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 151                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 152                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 153                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 154                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 155                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 156                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 157                 printk(" fstodb:      %u\n",
 158                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 159                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 160                 printk(" ndir         %u\n",
 161                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 162                 printk(" nifree       %u\n",
 163                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 164                 printk(" nbfree       %u\n",
 165                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 166                 printk(" nffree       %u\n",
 167                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 168         }
 169         printk("\n");
 170 }
 171
 172 /*
 173  * Print contents of ufs_cylinder_group, useful for debugging
 174  */
 175 static void ufs_print_cylinder_stuff(struct super_block *sb,
 176                                      struct ufs_cylinder_group *cg)
 177 {
 178         printk("\nufs_print_cylinder_stuff\n");
 179         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 180         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 181         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 182         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 183         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 184         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 185         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 186         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 187         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 188         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 189         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 190         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 191         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 192         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 193         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 194             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 195             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 196             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 197             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 198         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 199         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 200         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 201         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 202         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 203         printk("  clustersumoff %u\n",
 204                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 205         printk("  clusteroff    %u\n",
 206                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 207         printk("  nclusterblks  %u\n",
 208                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 209         printk("\n");
 210 }
 211 #else
 212 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 213 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 214 #endif /* CONFIG_UFS_DEBUG */
 215
 216 static const struct super_operations ufs_super_ops;
 217
 218 static char error_buf[1024];
 219
 220 void ufs_error (struct super_block * sb, const char * function,
 221         const char * fmt, ...)
 222 {
 223         struct ufs_sb_private_info * uspi;
 224         struct ufs_super_block_first * usb1;
 225         va_list args;
 226
 227         uspi = UFS_SB(sb)->s_uspi;
 228         usb1 = ubh_get_usb_first(uspi);
 229
 230         if (!(sb->s_flags & MS_RDONLY)) {
 231                 usb1->fs_clean = UFS_FSBAD;
 232                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 233                 sb->s_dirt = 1;
 234                 sb->s_flags |= MS_RDONLY;
 235         }
 236         va_start (args, fmt);
 237         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 238         va_end (args);
 239         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 240         case UFS_MOUNT_ONERROR_PANIC:
 241                 panic ("UFS-fs panic (device %s): %s: %s\n",
 242                         sb->s_id, function, error_buf);
 243
 244         case UFS_MOUNT_ONERROR_LOCK:
 245         case UFS_MOUNT_ONERROR_UMOUNT:
 246         case UFS_MOUNT_ONERROR_REPAIR:
 247                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 248                         sb->s_id, function, error_buf);
 249         }
 250 }
 251
 252 void ufs_panic (struct super_block * sb, const char * function,
 253         const char * fmt, ...)
 254 {
 255         struct ufs_sb_private_info * uspi;
 256         struct ufs_super_block_first * usb1;
 257         va_list args;
 258
 259         uspi = UFS_SB(sb)->s_uspi;
 260         usb1 = ubh_get_usb_first(uspi);
 261
 262         if (!(sb->s_flags & MS_RDONLY)) {
 263                 usb1->fs_clean = UFS_FSBAD;
 264                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 265                 sb->s_dirt = 1;
 266         }
 267         va_start (args, fmt);
 268         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 269         va_end (args);
 270         sb->s_flags |= MS_RDONLY;
 271         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 272                 sb->s_id, function, error_buf);
 273 }
 274
 275 void ufs_warning (struct super_block * sb, const char * function,
 276         const char * fmt, ...)
 277 {
 278         va_list args;
 279
 280         va_start (args, fmt);
 281         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 282         va_end (args);
 283         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 284                 sb->s_id, function, error_buf);
 285 }
 286
 287 enum {
 288         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
 289         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 290         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 291         Opt_onerror_umount, Opt_onerror_repair, Opt_err
 292 };
 293
 294 static match_table_t tokens = {
 295         {Opt_type_old, "ufstype=old"},
 296         {Opt_type_sunx86, "ufstype=sunx86"},
 297         {Opt_type_sun, "ufstype=sun"},
 298         {Opt_type_44bsd, "ufstype=44bsd"},
 299         {Opt_type_ufs2, "ufstype=ufs2"},
 300         {Opt_type_ufs2, "ufstype=5xbsd"},
 301         {Opt_type_hp, "ufstype=hp"},
 302         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 303         {Opt_type_nextstep, "ufstype=nextstep"},
 304         {Opt_type_openstep, "ufstype=openstep"},
 305         {Opt_onerror_panic, "onerror=panic"},
 306         {Opt_onerror_lock, "onerror=lock"},
 307         {Opt_onerror_umount, "onerror=umount"},
 308         {Opt_onerror_repair, "onerror=repair"},
 309         {Opt_err, NULL}
 310 };
 311
 312 static int ufs_parse_options (char * options, unsigned * mount_options)
 313 {
 314         char * p;
 315
 316         UFSD("ENTER\n");
 317
 318         if (!options)
 319                 return 1;
 320
 321         while ((p = strsep(&options, ",")) != NULL) {
 322                 substring_t args[MAX_OPT_ARGS];
 323                 int token;
 324                 if (!*p)
 325                         continue;
 326
 327                 token = match_token(p, tokens, args);
 328                 switch (token) {
 329                 case Opt_type_old:
 330                         ufs_clear_opt (*mount_options, UFSTYPE);
 331                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 332                         break;
 333                 case Opt_type_sunx86:
 334                         ufs_clear_opt (*mount_options, UFSTYPE);
 335                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 336                         break;
 337                 case Opt_type_sun:
 338                         ufs_clear_opt (*mount_options, UFSTYPE);
 339                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 340                         break;
 341                 case Opt_type_44bsd:
 342                         ufs_clear_opt (*mount_options, UFSTYPE);
 343                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 344                         break;
 345                 case Opt_type_ufs2:
 346                         ufs_clear_opt(*mount_options, UFSTYPE);
 347                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 348                         break;
 349                 case Opt_type_hp:
 350                         ufs_clear_opt (*mount_options, UFSTYPE);
 351                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 352                         break;
 353                 case Opt_type_nextstepcd:
 354                         ufs_clear_opt (*mount_options, UFSTYPE);
 355                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 356                         break;
 357                 case Opt_type_nextstep:
 358                         ufs_clear_opt (*mount_options, UFSTYPE);
 359                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 360                         break;
 361                 case Opt_type_openstep:
 362                         ufs_clear_opt (*mount_options, UFSTYPE);
 363                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 364                         break;
 365                 case Opt_onerror_panic:
 366                         ufs_clear_opt (*mount_options, ONERROR);
 367                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 368                         break;
 369                 case Opt_onerror_lock:
 370                         ufs_clear_opt (*mount_options, ONERROR);
 371                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 372                         break;
 373                 case Opt_onerror_umount:
 374                         ufs_clear_opt (*mount_options, ONERROR);
 375                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 376                         break;
 377                 case Opt_onerror_repair:
 378                         printk("UFS-fs: Unable to do repair on error, "
 379                                 "will lock lock instead\n");
 380                         ufs_clear_opt (*mount_options, ONERROR);
 381                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 382                         break;
 383                 default:
 384                         printk("UFS-fs: Invalid option: \"%s\" "
 385                                         "or missing value\n", p);
 386                         return 0;
 387                 }
 388         }
 389         return 1;
 390 }
 391
 392 /*
 393  * Diffrent types of UFS hold fs_cstotal in different
 394  * places, and use diffrent data structure for it.
 395  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 396  */
 397 static void ufs_setup_cstotal(struct super_block *sb)
 398 {
 399         struct ufs_sb_info *sbi = UFS_SB(sb);
 400         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 401         struct ufs_super_block_first *usb1;
 402         struct ufs_super_block_second *usb2;
 403         struct ufs_super_block_third *usb3;
 404         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 405
 406         UFSD("ENTER, mtype=%u\n", mtype);
 407         usb1 = ubh_get_usb_first(uspi);
 408         usb2 = ubh_get_usb_second(uspi);
 409         usb3 = ubh_get_usb_third(uspi);
 410
 411         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 412              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 413             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 414                 /*we have statistic in different place, then usual*/
 415                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 416                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 417                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 418                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 419         } else {
 420                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 421                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 422                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 423                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 424         }
 425         UFSD("EXIT\n");
 426 }
 427
 428 /*
 429  * Read on-disk structures associated with cylinder groups
 430  */
 431 static int ufs_read_cylinder_structures(struct super_block *sb)
 432 {
 433         struct ufs_sb_info *sbi = UFS_SB(sb);
 434         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 435         struct ufs_buffer_head * ubh;
 436         unsigned char * base, * space;
 437         unsigned size, blks, i;
 438         struct ufs_super_block_third *usb3;
 439
 440         UFSD("ENTER\n");
 441
 442         usb3 = ubh_get_usb_third(uspi);
 443         /*
 444          * Read cs structures from (usually) first data block
 445          * on the device.
 446          */
 447         size = uspi->s_cssize;
 448         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 449         base = space = kmalloc(size, GFP_KERNEL);
 450         if (!base)
 451                 goto failed;
 452         sbi->s_csp = (struct ufs_csum *)space;
 453         for (i = 0; i < blks; i += uspi->s_fpb) {
 454                 size = uspi->s_bsize;
 455                 if (i + uspi->s_fpb > blks)
 456                         size = (blks - i) * uspi->s_fsize;
 457
 458                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 459
 460                 if (!ubh)
 461                         goto failed;
 462
 463                 ubh_ubhcpymem (space, ubh, size);
 464
 465                 space += size;
 466                 ubh_brelse (ubh);
 467                 ubh = NULL;
 468         }
 469
 470         /*
 471          * Read cylinder group (we read only first fragment from block
 472          * at this time) and prepare internal data structures for cg caching.
 473          */
 474         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 475                 goto failed;
 476         for (i = 0; i < uspi->s_ncg; i++)
 477                 sbi->s_ucg[i] = NULL;
 478         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 479                 sbi->s_ucpi[i] = NULL;
 480                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 481         }
 482         for (i = 0; i < uspi->s_ncg; i++) {
 483                 UFSD("read cg %u\n", i);
 484                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 485                         goto failed;
 486                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 487                         goto failed;
 488
 489                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 490         }
 491         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 492                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 493                         goto failed;
 494                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 495         }
 496         sbi->s_cg_loaded = 0;
 497         UFSD("EXIT\n");
 498         return 1;
 499
 500 failed:
 501         kfree (base);
 502         if (sbi->s_ucg) {
 503                 for (i = 0; i < uspi->s_ncg; i++)
 504                         if (sbi->s_ucg[i])
 505                                 brelse (sbi->s_ucg[i]);
 506                 kfree (sbi->s_ucg);
 507                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 508                         kfree (sbi->s_ucpi[i]);
 509         }
 510         UFSD("EXIT (FAILED)\n");
 511         return 0;
 512 }
 513
 514 /*
 515  * Sync our internal copy of fs_cstotal with disk
 516  */
 517 static void ufs_put_cstotal(struct super_block *sb)
 518 {
 519         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 520         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 521         struct ufs_super_block_first *usb1;
 522         struct ufs_super_block_second *usb2;
 523         struct ufs_super_block_third *usb3;
 524
 525         UFSD("ENTER\n");
 526         usb1 = ubh_get_usb_first(uspi);
 527         usb2 = ubh_get_usb_second(uspi);
 528         usb3 = ubh_get_usb_third(uspi);
 529
 530         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 531              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 532             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 533                 /*we have statistic in different place, then usual*/
 534                 usb2->fs_un.fs_u2.cs_ndir =
 535                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 536                 usb2->fs_un.fs_u2.cs_nbfree =
 537                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 538                 usb3->fs_un1.fs_u2.cs_nifree =
 539                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 540                 usb3->fs_un1.fs_u2.cs_nffree =
 541                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 542         } else {
 543                 usb1->fs_cstotal.cs_ndir =
 544                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 545                 usb1->fs_cstotal.cs_nbfree =
 546                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 547                 usb1->fs_cstotal.cs_nifree =
 548                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 549                 usb1->fs_cstotal.cs_nffree =
 550                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 551         }
 552         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 553         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 554         UFSD("EXIT\n");
 555 }
 556
 557 /**
 558  * ufs_put_super_internal() - put on-disk intrenal structures
 559  * @sb: pointer to super_block structure
 560  * Put on-disk structures associated with cylinder groups
 561  * and write them back to disk, also update cs_total on disk
 562  */
 563 static void ufs_put_super_internal(struct super_block *sb)
 564 {
 565         struct ufs_sb_info *sbi = UFS_SB(sb);
 566         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 567         struct ufs_buffer_head * ubh;
 568         unsigned char * base, * space;
 569         unsigned blks, size, i;
 570
 571
 572         UFSD("ENTER\n");
 573         ufs_put_cstotal(sb);
 574         size = uspi->s_cssize;
 575         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 576         base = space = (char*) sbi->s_csp;
 577         for (i = 0; i < blks; i += uspi->s_fpb) {
 578                 size = uspi->s_bsize;
 579                 if (i + uspi->s_fpb > blks)
 580                         size = (blks - i) * uspi->s_fsize;
 581
 582                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 583
 584                 ubh_memcpyubh (ubh, space, size);
 585                 space += size;
 586                 ubh_mark_buffer_uptodate (ubh, 1);
 587                 ubh_mark_buffer_dirty (ubh);
 588                 ubh_brelse (ubh);
 589         }
 590         for (i = 0; i < sbi->s_cg_loaded; i++) {
 591                 ufs_put_cylinder (sb, i);
 592                 kfree (sbi->s_ucpi[i]);
 593         }
 594         for (; i < UFS_MAX_GROUP_LOADED; i++)
 595                 kfree (sbi->s_ucpi[i]);
 596         for (i = 0; i < uspi->s_ncg; i++)
 597                 brelse (sbi->s_ucg[i]);
 598         kfree (sbi->s_ucg);
 599         kfree (base);
 600         UFSD("EXIT\n");
 601 }
 602
 603 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 604 {
 605         struct ufs_sb_info * sbi;
 606         struct ufs_sb_private_info * uspi;
 607         struct ufs_super_block_first * usb1;
 608         struct ufs_super_block_second * usb2;
 609         struct ufs_super_block_third * usb3;
 610         struct ufs_buffer_head * ubh;
 611         struct inode *inode;
 612         unsigned block_size, super_block_size;
 613         unsigned flags;
 614         unsigned super_block_offset;
 615
 616         uspi = NULL;
 617         ubh = NULL;
 618         flags = 0;
 619
 620         UFSD("ENTER\n");
 621
 622         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 623         if (!sbi)
 624                 goto failed_nomem;
 625         sb->s_fs_info = sbi;
 626
 627         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 628
 629 #ifndef CONFIG_UFS_FS_WRITE
 630         if (!(sb->s_flags & MS_RDONLY)) {
 631                 printk("ufs was compiled with read-only support, "
 632                 "can't be mounted as read-write\n");
 633                 goto failed;
 634         }
 635 #endif
 636         /*
 637          * Set default mount options
 638          * Parse mount options
 639          */
 640         sbi->s_mount_opt = 0;
 641         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 642         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 643                 printk("wrong mount options\n");
 644                 goto failed;
 645         }
 646         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 647                 if (!silent)
 648                         printk("You didn't specify the type of your ufs filesystem\n\n"
 649                         "mount -t ufs -o ufstype="
 650                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 651                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 652                         "default is ufstype=old\n");
 653                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 654         }
 655
 656         sbi->s_uspi = uspi =
 657                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 658         if (!uspi)
 659                 goto failed;
 660         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 661         super_block_offset=UFS_SBLOCK;
 662
 663         /* Keep 2Gig file limit. Some UFS variants need to override
 664            this but as I don't know which I'll let those in the know loosen
 665            the rules */
 666         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 667         case UFS_MOUNT_UFSTYPE_44BSD:
 668                 UFSD("ufstype=44bsd\n");
 669                 uspi->s_fsize = block_size = 512;
 670                 uspi->s_fmask = ~(512 - 1);
 671                 uspi->s_fshift = 9;
 672                 uspi->s_sbsize = super_block_size = 1536;
 673                 uspi->s_sbbase = 0;
 674                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 675                 break;
 676         case UFS_MOUNT_UFSTYPE_UFS2:
 677                 UFSD("ufstype=ufs2\n");
 678                 super_block_offset=SBLOCK_UFS2;
 679                 uspi->s_fsize = block_size = 512;
 680                 uspi->s_fmask = ~(512 - 1);
 681                 uspi->s_fshift = 9;
 682                 uspi->s_sbsize = super_block_size = 1536;
 683                 uspi->s_sbbase =  0;
 684                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 685                 break;
 686
 687         case UFS_MOUNT_UFSTYPE_SUN:
 688                 UFSD("ufstype=sun\n");
 689                 uspi->s_fsize = block_size = 1024;
 690                 uspi->s_fmask = ~(1024 - 1);
 691                 uspi->s_fshift = 10;
 692                 uspi->s_sbsize = super_block_size = 2048;
 693                 uspi->s_sbbase = 0;
 694                 uspi->s_maxsymlinklen = 56;
 695                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 696                 break;
 697
 698         case UFS_MOUNT_UFSTYPE_SUNx86:
 699                 UFSD("ufstype=sunx86\n");
 700                 uspi->s_fsize = block_size = 1024;
 701                 uspi->s_fmask = ~(1024 - 1);
 702                 uspi->s_fshift = 10;
 703                 uspi->s_sbsize = super_block_size = 2048;
 704                 uspi->s_sbbase = 0;
 705                 uspi->s_maxsymlinklen = 56;
 706                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 707                 break;
 708
 709         case UFS_MOUNT_UFSTYPE_OLD:
 710                 UFSD("ufstype=old\n");
 711                 uspi->s_fsize = block_size = 1024;
 712                 uspi->s_fmask = ~(1024 - 1);
 713                 uspi->s_fshift = 10;
 714                 uspi->s_sbsize = super_block_size = 2048;
 715                 uspi->s_sbbase = 0;
 716                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 717                 if (!(sb->s_flags & MS_RDONLY)) {
 718                         if (!silent)
 719                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 720                         sb->s_flags |= MS_RDONLY;
 721                 }
 722                 break;
 723
 724         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 725                 /*TODO: check may be we need set special dir block size?*/
 726                 UFSD("ufstype=nextstep\n");
 727                 uspi->s_fsize = block_size = 1024;
 728                 uspi->s_fmask = ~(1024 - 1);
 729                 uspi->s_fshift = 10;
 730                 uspi->s_sbsize = super_block_size = 2048;
 731                 uspi->s_sbbase = 0;
 732                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 733                 if (!(sb->s_flags & MS_RDONLY)) {
 734                         if (!silent)
 735                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 736                         sb->s_flags |= MS_RDONLY;
 737                 }
 738                 break;
 739
 740         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 741                 /*TODO: check may be we need set special dir block size?*/
 742                 UFSD("ufstype=nextstep-cd\n");
 743                 uspi->s_fsize = block_size = 2048;
 744                 uspi->s_fmask = ~(2048 - 1);
 745                 uspi->s_fshift = 11;
 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=nextstep-cd is supported read-only\n");
 752                         sb->s_flags |= MS_RDONLY;
 753                 }
 754                 break;
 755
 756         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 757                 UFSD("ufstype=openstep\n");
 758                 uspi->s_fsize = block_size = 1024;
 759                 uspi->s_fmask = ~(1024 - 1);
 760                 uspi->s_fshift = 10;
 761                 uspi->s_sbsize = super_block_size = 2048;
 762                 uspi->s_sbbase = 0;
 763                 uspi->s_dirblksize = 1024;
 764                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 765                 if (!(sb->s_flags & MS_RDONLY)) {
 766                         if (!silent)
 767                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 768                         sb->s_flags |= MS_RDONLY;
 769                 }
 770                 break;
 771
 772         case UFS_MOUNT_UFSTYPE_HP:
 773                 UFSD("ufstype=hp\n");
 774                 uspi->s_fsize = block_size = 1024;
 775                 uspi->s_fmask = ~(1024 - 1);
 776                 uspi->s_fshift = 10;
 777                 uspi->s_sbsize = super_block_size = 2048;
 778                 uspi->s_sbbase = 0;
 779                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 780                 if (!(sb->s_flags & MS_RDONLY)) {
 781                         if (!silent)
 782                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 783                         sb->s_flags |= MS_RDONLY;
 784                 }
 785                 break;
 786         default:
 787                 if (!silent)
 788                         printk("unknown ufstype\n");
 789                 goto failed;
 790         }
 791
 792 again:
 793         if (!sb_set_blocksize(sb, block_size)) {
 794                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 795                 goto failed;
 796         }
 797
 798         /*
 799          * read ufs super block from device
 800          */
 801
 802         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 803
 804         if (!ubh)
 805             goto failed;
 806
 807
 808         usb1 = ubh_get_usb_first(uspi);
 809         usb2 = ubh_get_usb_second(uspi);
 810         usb3 = ubh_get_usb_third(uspi);
 811
 812         /*
 813          * Check ufs magic number
 814          */
 815         sbi->s_bytesex = BYTESEX_LE;
 816         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 817                 case UFS_MAGIC:
 818                 case UFS2_MAGIC:
 819                 case UFS_MAGIC_LFN:
 820                 case UFS_MAGIC_FEA:
 821                 case UFS_MAGIC_4GB:
 822                         goto magic_found;
 823         }
 824         sbi->s_bytesex = BYTESEX_BE;
 825         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 826                 case UFS_MAGIC:
 827                 case UFS2_MAGIC:
 828                 case UFS_MAGIC_LFN:
 829                 case UFS_MAGIC_FEA:
 830                 case UFS_MAGIC_4GB:
 831                         goto magic_found;
 832         }
 833
 834         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 835           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 836           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 837           && uspi->s_sbbase < 256) {
 838                 ubh_brelse_uspi(uspi);
 839                 ubh = NULL;
 840                 uspi->s_sbbase += 8;
 841                 goto again;
 842         }
 843         if (!silent)
 844                 printk("ufs_read_super: bad magic number\n");
 845         goto failed;
 846
 847 magic_found:
 848         /*
 849          * Check block and fragment sizes
 850          */
 851         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 852         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 853         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 854         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 855         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 856
 857         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
 858                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 859                         uspi->s_fsize);
 860                         goto failed;
 861         }
 862         if (uspi->s_fsize < 512) {
 863                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 864                         uspi->s_fsize);
 865                 goto failed;
 866         }
 867         if (uspi->s_fsize > 4096) {
 868                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 869                         uspi->s_fsize);
 870                 goto failed;
 871         }
 872         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
 873                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 874                         uspi->s_bsize);
 875                 goto failed;
 876         }
 877         if (uspi->s_bsize < 4096) {
 878                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 879                         uspi->s_bsize);
 880                 goto failed;
 881         }
 882         if (uspi->s_bsize / uspi->s_fsize > 8) {
 883                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 884                         uspi->s_bsize / uspi->s_fsize);
 885                 goto failed;
 886         }
 887         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 888                 ubh_brelse_uspi(uspi);
 889                 ubh = NULL;
 890                 block_size = uspi->s_fsize;
 891                 super_block_size = uspi->s_sbsize;
 892                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 893                 goto again;
 894         }
 895
 896
 897         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 898
 899         /*
 900          * Check, if file system was correctly unmounted.
 901          * If not, make it read only.
 902          */
 903         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 904           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 905           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 906           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 907           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 908                 switch(usb1->fs_clean) {
 909                 case UFS_FSCLEAN:
 910                         UFSD("fs is clean\n");
 911                         break;
 912                 case UFS_FSSTABLE:
 913                         UFSD("fs is stable\n");
 914                         break;
 915                 case UFS_FSOSF1:
 916                         UFSD("fs is DEC OSF/1\n");
 917                         break;
 918                 case UFS_FSACTIVE:
 919                         printk("ufs_read_super: fs is active\n");
 920                         sb->s_flags |= MS_RDONLY;
 921                         break;
 922                 case UFS_FSBAD:
 923                         printk("ufs_read_super: fs is bad\n");
 924                         sb->s_flags |= MS_RDONLY;
 925                         break;
 926                 default:
 927                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 928                         sb->s_flags |= MS_RDONLY;
 929                         break;
 930                 }
 931         } else {
 932                 printk("ufs_read_super: fs needs fsck\n");
 933                 sb->s_flags |= MS_RDONLY;
 934         }
 935
 936         /*
 937          * Read ufs_super_block into internal data structures
 938          */
 939         sb->s_op = &ufs_super_ops;
 940         sb->dq_op = NULL; /***/
 941         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 942
 943         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 944         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 945         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 946         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 947         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 948         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 949
 950         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 951                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 952                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 953         } else {
 954                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 955                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 956         }
 957
 958         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 959         /* s_bsize already set */
 960         /* s_fsize already set */
 961         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 962         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 963         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 964         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 965         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 966         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 967         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
 968                 uspi->s_fshift);
 969         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 970         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 971         /* s_sbsize already set */
 972         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 973         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 974         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 975         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 976         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 977         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 978         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 979         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 980
 981         if (uspi->fs_magic == UFS2_MAGIC)
 982                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
 983         else
 984                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 985
 986         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 987         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 988         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 989         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 990         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 991         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 992         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 993         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
 994         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
 995         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 996         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 997         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 998         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 999         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1000         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1001
1002         /*
1003          * Compute another frequently used values
1004          */
1005         uspi->s_fpbmask = uspi->s_fpb - 1;
1006         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1007                 uspi->s_apbshift = uspi->s_bshift - 3;
1008         else
1009                 uspi->s_apbshift = uspi->s_bshift - 2;
1010
1011         uspi->s_2apbshift = uspi->s_apbshift * 2;
1012         uspi->s_3apbshift = uspi->s_apbshift * 3;
1013         uspi->s_apb = 1 << uspi->s_apbshift;
1014         uspi->s_2apb = 1 << uspi->s_2apbshift;
1015         uspi->s_3apb = 1 << uspi->s_3apbshift;
1016         uspi->s_apbmask = uspi->s_apb - 1;
1017         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1018         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1019         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1020         uspi->s_bpf = uspi->s_fsize << 3;
1021         uspi->s_bpfshift = uspi->s_fshift + 3;
1022         uspi->s_bpfmask = uspi->s_bpf - 1;
1023         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1024             UFS_MOUNT_UFSTYPE_44BSD)
1025                 uspi->s_maxsymlinklen =
1026                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1027
1028         sbi->s_flags = flags;
1029
1030         inode = iget(sb, UFS_ROOTINO);
1031         if (!inode || is_bad_inode(inode))
1032                 goto failed;
1033         sb->s_root = d_alloc_root(inode);
1034         if (!sb->s_root)
1035                 goto dalloc_failed;
1036
1037         ufs_setup_cstotal(sb);
1038         /*
1039          * Read cylinder group structures
1040          */
1041         if (!(sb->s_flags & MS_RDONLY))
1042                 if (!ufs_read_cylinder_structures(sb))
1043                         goto failed;
1044
1045         UFSD("EXIT\n");
1046         return 0;
1047
1048 dalloc_failed:
1049         iput(inode);
1050 failed:
1051         if (ubh)
1052                 ubh_brelse_uspi (uspi);
1053         kfree (uspi);
1054         kfree(sbi);
1055         sb->s_fs_info = NULL;
1056         UFSD("EXIT (FAILED)\n");
1057         return -EINVAL;
1058
1059 failed_nomem:
1060         UFSD("EXIT (NOMEM)\n");
1061         return -ENOMEM;
1062 }
1063
1064 static void ufs_write_super(struct super_block *sb)
1065 {
1066         struct ufs_sb_private_info * uspi;
1067         struct ufs_super_block_first * usb1;
1068         struct ufs_super_block_third * usb3;
1069         unsigned flags;
1070
1071         lock_kernel();
1072         UFSD("ENTER\n");
1073         flags = UFS_SB(sb)->s_flags;
1074         uspi = UFS_SB(sb)->s_uspi;
1075         usb1 = ubh_get_usb_first(uspi);
1076         usb3 = ubh_get_usb_third(uspi);
1077
1078         if (!(sb->s_flags & MS_RDONLY)) {
1079                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1080                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1081                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1082                         ufs_set_fs_state(sb, usb1, usb3,
1083                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1084                 ufs_put_cstotal(sb);
1085         }
1086         sb->s_dirt = 0;
1087         UFSD("EXIT\n");
1088         unlock_kernel();
1089 }
1090
1091 static void ufs_put_super(struct super_block *sb)
1092 {
1093         struct ufs_sb_info * sbi = UFS_SB(sb);
1094
1095         UFSD("ENTER\n");
1096
1097         if (!(sb->s_flags & MS_RDONLY))
1098                 ufs_put_super_internal(sb);
1099
1100         ubh_brelse_uspi (sbi->s_uspi);
1101         kfree (sbi->s_uspi);
1102         kfree (sbi);
1103         sb->s_fs_info = NULL;
1104         UFSD("EXIT\n");
1105         return;
1106 }
1107
1108
1109 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1110 {
1111         struct ufs_sb_private_info * uspi;
1112         struct ufs_super_block_first * usb1;
1113         struct ufs_super_block_third * usb3;
1114         unsigned new_mount_opt, ufstype;
1115         unsigned flags;
1116
1117         uspi = UFS_SB(sb)->s_uspi;
1118         flags = UFS_SB(sb)->s_flags;
1119         usb1 = ubh_get_usb_first(uspi);
1120         usb3 = ubh_get_usb_third(uspi);
1121
1122         /*
1123          * Allow the "check" option to be passed as a remount option.
1124          * It is not possible to change ufstype option during remount
1125          */
1126         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1127         new_mount_opt = 0;
1128         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1129         if (!ufs_parse_options (data, &new_mount_opt))
1130                 return -EINVAL;
1131         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1132                 new_mount_opt |= ufstype;
1133         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1134                 printk("ufstype can't be changed during remount\n");
1135                 return -EINVAL;
1136         }
1137
1138         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1139                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1140                 return 0;
1141         }
1142
1143         /*
1144          * fs was mouted as rw, remounting ro
1145          */
1146         if (*mount_flags & MS_RDONLY) {
1147                 ufs_put_super_internal(sb);
1148                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1149                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1150                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1151                         ufs_set_fs_state(sb, usb1, usb3,
1152                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1153                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1154                 sb->s_dirt = 0;
1155                 sb->s_flags |= MS_RDONLY;
1156         } else {
1157         /*
1158          * fs was mounted as ro, remounting rw
1159          */
1160 #ifndef CONFIG_UFS_FS_WRITE
1161                 printk("ufs was compiled with read-only support, "
1162                 "can't be mounted as read-write\n");
1163                 return -EINVAL;
1164 #else
1165                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1166                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1167                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1168                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1169                         printk("this ufstype is read-only supported\n");
1170                         return -EINVAL;
1171                 }
1172                 if (!ufs_read_cylinder_structures(sb)) {
1173                         printk("failed during remounting\n");
1174                         return -EPERM;
1175                 }
1176                 sb->s_flags &= ~MS_RDONLY;
1177 #endif
1178         }
1179         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1180         return 0;
1181 }
1182
1183 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1184 {
1185         struct super_block *sb = dentry->d_sb;
1186         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1187         unsigned  flags = UFS_SB(sb)->s_flags;
1188         struct ufs_super_block_first *usb1;
1189         struct ufs_super_block_second *usb2;
1190         struct ufs_super_block_third *usb3;
1191
1192         lock_kernel();
1193
1194         usb1 = ubh_get_usb_first(uspi);
1195         usb2 = ubh_get_usb_second(uspi);
1196         usb3 = ubh_get_usb_third(uspi);
1197
1198         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1199                 buf->f_type = UFS2_MAGIC;
1200                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1201         } else {
1202                 buf->f_type = UFS_MAGIC;
1203                 buf->f_blocks = uspi->s_dsize;
1204         }
1205         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1206                 uspi->cs_total.cs_nffree;
1207         buf->f_ffree = uspi->cs_total.cs_nifree;
1208         buf->f_bsize = sb->s_blocksize;
1209         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1210                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1211         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1212         buf->f_namelen = UFS_MAXNAMLEN;
1213
1214         unlock_kernel();
1215
1216         return 0;
1217 }
1218
1219 static struct kmem_cache * ufs_inode_cachep;
1220
1221 static struct inode *ufs_alloc_inode(struct super_block *sb)
1222 {
1223         struct ufs_inode_info *ei;
1224         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1225         if (!ei)
1226                 return NULL;
1227         ei->vfs_inode.i_version = 1;
1228         return &ei->vfs_inode;
1229 }
1230
1231 static void ufs_destroy_inode(struct inode *inode)
1232 {
1233         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1234 }
1235
1236 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1237 {
1238         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1239
1240         inode_init_once(&ei->vfs_inode);
1241 }
1242
1243 static int init_inodecache(void)
1244 {
1245         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1246                                              sizeof(struct ufs_inode_info),
1247                                              0, (SLAB_RECLAIM_ACCOUNT|
1248                                                 SLAB_MEM_SPREAD),
1249                                              init_once, NULL);
1250         if (ufs_inode_cachep == NULL)
1251                 return -ENOMEM;
1252         return 0;
1253 }
1254
1255 static void destroy_inodecache(void)
1256 {
1257         kmem_cache_destroy(ufs_inode_cachep);
1258 }
1259
1260 #ifdef CONFIG_QUOTA
1261 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1262 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1263 #endif
1264
1265 static const struct super_operations ufs_super_ops = {
1266         .alloc_inode    = ufs_alloc_inode,
1267         .destroy_inode  = ufs_destroy_inode,
1268         .read_inode     = ufs_read_inode,
1269         .write_inode    = ufs_write_inode,
1270         .delete_inode   = ufs_delete_inode,
1271         .put_super      = ufs_put_super,
1272         .write_super    = ufs_write_super,
1273         .statfs         = ufs_statfs,
1274         .remount_fs     = ufs_remount,
1275 #ifdef CONFIG_QUOTA
1276         .quota_read     = ufs_quota_read,
1277         .quota_write    = ufs_quota_write,
1278 #endif
1279 };
1280
1281 #ifdef CONFIG_QUOTA
1282
1283 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1284  * acquiring the locks... As quota files are never truncated and quota code
1285  * itself serializes the operations (and noone else should touch the files)
1286  * we don't have to be afraid of races */
1287 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1288                                size_t len, loff_t off)
1289 {
1290         struct inode *inode = sb_dqopt(sb)->files[type];
1291         sector_t blk = off >> sb->s_blocksize_bits;
1292         int err = 0;
1293         int offset = off & (sb->s_blocksize - 1);
1294         int tocopy;
1295         size_t toread;
1296         struct buffer_head *bh;
1297         loff_t i_size = i_size_read(inode);
1298
1299         if (off > i_size)
1300                 return 0;
1301         if (off+len > i_size)
1302                 len = i_size-off;
1303         toread = len;
1304         while (toread > 0) {
1305                 tocopy = sb->s_blocksize - offset < toread ?
1306                                 sb->s_blocksize - offset : toread;
1307
1308                 bh = ufs_bread(inode, blk, 0, &err);
1309                 if (err)
1310                         return err;
1311                 if (!bh)        /* A hole? */
1312                         memset(data, 0, tocopy);
1313                 else {
1314                         memcpy(data, bh->b_data+offset, tocopy);
1315                         brelse(bh);
1316                 }
1317                 offset = 0;
1318                 toread -= tocopy;
1319                 data += tocopy;
1320                 blk++;
1321         }
1322         return len;
1323 }
1324
1325 /* Write to quotafile */
1326 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1327                                 const char *data, size_t len, loff_t off)
1328 {
1329         struct inode *inode = sb_dqopt(sb)->files[type];
1330         sector_t blk = off >> sb->s_blocksize_bits;
1331         int err = 0;
1332         int offset = off & (sb->s_blocksize - 1);
1333         int tocopy;
1334         size_t towrite = len;
1335         struct buffer_head *bh;
1336
1337         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1338         while (towrite > 0) {
1339                 tocopy = sb->s_blocksize - offset < towrite ?
1340                                 sb->s_blocksize - offset : towrite;
1341
1342                 bh = ufs_bread(inode, blk, 1, &err);
1343                 if (!bh)
1344                         goto out;
1345                 lock_buffer(bh);
1346                 memcpy(bh->b_data+offset, data, tocopy);
1347                 flush_dcache_page(bh->b_page);
1348                 set_buffer_uptodate(bh);
1349                 mark_buffer_dirty(bh);
1350                 unlock_buffer(bh);
1351                 brelse(bh);
1352                 offset = 0;
1353                 towrite -= tocopy;
1354                 data += tocopy;
1355                 blk++;
1356         }
1357 out:
1358         if (len == towrite) {
1359                 mutex_unlock(&inode->i_mutex);
1360                 return err;
1361         }
1362         if (inode->i_size < off+len-towrite)
1363                 i_size_write(inode, off+len-towrite);
1364         inode->i_version++;
1365         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1366         mark_inode_dirty(inode);
1367         mutex_unlock(&inode->i_mutex);
1368         return len - towrite;
1369 }
1370
1371 #endif
1372
1373 static int ufs_get_sb(struct file_system_type *fs_type,
1374         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1375 {
1376         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1377 }
1378
1379 static struct file_system_type ufs_fs_type = {
1380         .owner          = THIS_MODULE,
1381         .name           = "ufs",
1382         .get_sb         = ufs_get_sb,
1383         .kill_sb        = kill_block_super,
1384         .fs_flags       = FS_REQUIRES_DEV,
1385 };
1386
1387 static int __init init_ufs_fs(void)
1388 {
1389         int err = init_inodecache();
1390         if (err)
1391                 goto out1;
1392         err = register_filesystem(&ufs_fs_type);
1393         if (err)
1394                 goto out;
1395         return 0;
1396 out:
1397         destroy_inodecache();
1398 out1:
1399         return err;
1400 }
1401
1402 static void __exit exit_ufs_fs(void)
1403 {
1404         unregister_filesystem(&ufs_fs_type);
1405         destroy_inodecache();
1406 }
1407
1408 module_init(init_ufs_fs)
1409 module_exit(exit_ufs_fs)
1410 MODULE_LICENSE("GPL");