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 #include <linux/log2.h>
  91
  92 #include "swab.h"
  93 #include "util.h"
  94
  95 #ifdef CONFIG_UFS_DEBUG
  96 /*
  97  * Print contents of ufs_super_block, useful for debugging
  98  */
  99 static void ufs_print_super_stuff(struct super_block *sb,
 100                                   struct ufs_super_block_first *usb1,
 101                                   struct ufs_super_block_second *usb2,
 102                                   struct ufs_super_block_third *usb3)
 103 {
 104         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 105
 106         printk("ufs_print_super_stuff\n");
 107         printk("  magic:     0x%x\n", magic);
 108         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 109                 printk("  fs_size:   %llu\n", (unsigned long long)
 110                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 111                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 112                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 113                 printk("  bsize:         %u\n",
 114                        fs32_to_cpu(sb, usb1->fs_bsize));
 115                 printk("  fsize:         %u\n",
 116                        fs32_to_cpu(sb, usb1->fs_fsize));
 117                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 118                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 119                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 120                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 121                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 122                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 123                        (unsigned long long)
 124                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 125                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 126                        (unsigned long long)
 127                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 128                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 129                        (unsigned long long)
 130                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 131         } else {
 132                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 133                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 134                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 135                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 136                 printk(" cgoffset:    %u\n",
 137                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 138                 printk(" ~cgmask:     0x%x\n",
 139                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 140                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 141                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 142                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 143                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 144                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 145                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 146                 printk(" fragshift:   %u\n",
 147                        fs32_to_cpu(sb, usb1->fs_fragshift));
 148                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 149                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 150                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 151                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 152                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 153                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 154                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 155                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 156                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 157                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 158                 printk(" fstodb:      %u\n",
 159                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 160                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 161                 printk(" ndir         %u\n",
 162                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 163                 printk(" nifree       %u\n",
 164                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 165                 printk(" nbfree       %u\n",
 166                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 167                 printk(" nffree       %u\n",
 168                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 169         }
 170         printk("\n");
 171 }
 172
 173 /*
 174  * Print contents of ufs_cylinder_group, useful for debugging
 175  */
 176 static void ufs_print_cylinder_stuff(struct super_block *sb,
 177                                      struct ufs_cylinder_group *cg)
 178 {
 179         printk("\nufs_print_cylinder_stuff\n");
 180         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 181         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 182         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 183         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 184         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 185         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 186         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 187         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 188         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 189         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 190         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 191         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 192         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 193         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 194         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 195             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 196             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 197             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 198             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 199         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 200         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 201         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 202         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 203         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 204         printk("  clustersumoff %u\n",
 205                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 206         printk("  clusteroff    %u\n",
 207                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 208         printk("  nclusterblks  %u\n",
 209                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 210         printk("\n");
 211 }
 212 #else
 213 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 214 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 215 #endif /* CONFIG_UFS_DEBUG */
 216
 217 static const struct super_operations ufs_super_ops;
 218
 219 static char error_buf[1024];
 220
 221 void ufs_error (struct super_block * sb, const char * function,
 222         const char * fmt, ...)
 223 {
 224         struct ufs_sb_private_info * uspi;
 225         struct ufs_super_block_first * usb1;
 226         va_list args;
 227
 228         uspi = UFS_SB(sb)->s_uspi;
 229         usb1 = ubh_get_usb_first(uspi);
 230
 231         if (!(sb->s_flags & MS_RDONLY)) {
 232                 usb1->fs_clean = UFS_FSBAD;
 233                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 234                 sb->s_dirt = 1;
 235                 sb->s_flags |= MS_RDONLY;
 236         }
 237         va_start (args, fmt);
 238         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 239         va_end (args);
 240         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 241         case UFS_MOUNT_ONERROR_PANIC:
 242                 panic ("UFS-fs panic (device %s): %s: %s\n",
 243                         sb->s_id, function, error_buf);
 244
 245         case UFS_MOUNT_ONERROR_LOCK:
 246         case UFS_MOUNT_ONERROR_UMOUNT:
 247         case UFS_MOUNT_ONERROR_REPAIR:
 248                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 249                         sb->s_id, function, error_buf);
 250         }
 251 }
 252
 253 void ufs_panic (struct super_block * sb, const char * function,
 254         const char * fmt, ...)
 255 {
 256         struct ufs_sb_private_info * uspi;
 257         struct ufs_super_block_first * usb1;
 258         va_list args;
 259
 260         uspi = UFS_SB(sb)->s_uspi;
 261         usb1 = ubh_get_usb_first(uspi);
 262
 263         if (!(sb->s_flags & MS_RDONLY)) {
 264                 usb1->fs_clean = UFS_FSBAD;
 265                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 266                 sb->s_dirt = 1;
 267         }
 268         va_start (args, fmt);
 269         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 270         va_end (args);
 271         sb->s_flags |= MS_RDONLY;
 272         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 273                 sb->s_id, function, error_buf);
 274 }
 275
 276 void ufs_warning (struct super_block * sb, const char * function,
 277         const char * fmt, ...)
 278 {
 279         va_list args;
 280
 281         va_start (args, fmt);
 282         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 283         va_end (args);
 284         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 285                 sb->s_id, function, error_buf);
 286 }
 287
 288 enum {
 289         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
 290         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 291         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 292         Opt_onerror_umount, Opt_onerror_repair, Opt_err
 293 };
 294
 295 static match_table_t tokens = {
 296         {Opt_type_old, "ufstype=old"},
 297         {Opt_type_sunx86, "ufstype=sunx86"},
 298         {Opt_type_sun, "ufstype=sun"},
 299         {Opt_type_44bsd, "ufstype=44bsd"},
 300         {Opt_type_ufs2, "ufstype=ufs2"},
 301         {Opt_type_ufs2, "ufstype=5xbsd"},
 302         {Opt_type_hp, "ufstype=hp"},
 303         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 304         {Opt_type_nextstep, "ufstype=nextstep"},
 305         {Opt_type_openstep, "ufstype=openstep"},
 306         {Opt_onerror_panic, "onerror=panic"},
 307         {Opt_onerror_lock, "onerror=lock"},
 308         {Opt_onerror_umount, "onerror=umount"},
 309         {Opt_onerror_repair, "onerror=repair"},
 310         {Opt_err, NULL}
 311 };
 312
 313 static int ufs_parse_options (char * options, unsigned * mount_options)
 314 {
 315         char * p;
 316
 317         UFSD("ENTER\n");
 318
 319         if (!options)
 320                 return 1;
 321
 322         while ((p = strsep(&options, ",")) != NULL) {
 323                 substring_t args[MAX_OPT_ARGS];
 324                 int token;
 325                 if (!*p)
 326                         continue;
 327
 328                 token = match_token(p, tokens, args);
 329                 switch (token) {
 330                 case Opt_type_old:
 331                         ufs_clear_opt (*mount_options, UFSTYPE);
 332                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 333                         break;
 334                 case Opt_type_sunx86:
 335                         ufs_clear_opt (*mount_options, UFSTYPE);
 336                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 337                         break;
 338                 case Opt_type_sun:
 339                         ufs_clear_opt (*mount_options, UFSTYPE);
 340                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 341                         break;
 342                 case Opt_type_44bsd:
 343                         ufs_clear_opt (*mount_options, UFSTYPE);
 344                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 345                         break;
 346                 case Opt_type_ufs2:
 347                         ufs_clear_opt(*mount_options, UFSTYPE);
 348                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 349                         break;
 350                 case Opt_type_hp:
 351                         ufs_clear_opt (*mount_options, UFSTYPE);
 352                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 353                         break;
 354                 case Opt_type_nextstepcd:
 355                         ufs_clear_opt (*mount_options, UFSTYPE);
 356                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 357                         break;
 358                 case Opt_type_nextstep:
 359                         ufs_clear_opt (*mount_options, UFSTYPE);
 360                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 361                         break;
 362                 case Opt_type_openstep:
 363                         ufs_clear_opt (*mount_options, UFSTYPE);
 364                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 365                         break;
 366                 case Opt_onerror_panic:
 367                         ufs_clear_opt (*mount_options, ONERROR);
 368                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 369                         break;
 370                 case Opt_onerror_lock:
 371                         ufs_clear_opt (*mount_options, ONERROR);
 372                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 373                         break;
 374                 case Opt_onerror_umount:
 375                         ufs_clear_opt (*mount_options, ONERROR);
 376                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 377                         break;
 378                 case Opt_onerror_repair:
 379                         printk("UFS-fs: Unable to do repair on error, "
 380                                 "will lock lock instead\n");
 381                         ufs_clear_opt (*mount_options, ONERROR);
 382                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 383                         break;
 384                 default:
 385                         printk("UFS-fs: Invalid option: \"%s\" "
 386                                         "or missing value\n", p);
 387                         return 0;
 388                 }
 389         }
 390         return 1;
 391 }
 392
 393 /*
 394  * Diffrent types of UFS hold fs_cstotal in different
 395  * places, and use diffrent data structure for it.
 396  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 397  */
 398 static void ufs_setup_cstotal(struct super_block *sb)
 399 {
 400         struct ufs_sb_info *sbi = UFS_SB(sb);
 401         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 402         struct ufs_super_block_first *usb1;
 403         struct ufs_super_block_second *usb2;
 404         struct ufs_super_block_third *usb3;
 405         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 406
 407         UFSD("ENTER, mtype=%u\n", mtype);
 408         usb1 = ubh_get_usb_first(uspi);
 409         usb2 = ubh_get_usb_second(uspi);
 410         usb3 = ubh_get_usb_third(uspi);
 411
 412         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 413              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 414             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 415                 /*we have statistic in different place, then usual*/
 416                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 417                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 418                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 419                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 420         } else {
 421                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 422                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 423                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 424                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 425         }
 426         UFSD("EXIT\n");
 427 }
 428
 429 /*
 430  * Read on-disk structures associated with cylinder groups
 431  */
 432 static int ufs_read_cylinder_structures(struct super_block *sb)
 433 {
 434         struct ufs_sb_info *sbi = UFS_SB(sb);
 435         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 436         struct ufs_buffer_head * ubh;
 437         unsigned char * base, * space;
 438         unsigned size, blks, i;
 439         struct ufs_super_block_third *usb3;
 440
 441         UFSD("ENTER\n");
 442
 443         usb3 = ubh_get_usb_third(uspi);
 444         /*
 445          * Read cs structures from (usually) first data block
 446          * on the device.
 447          */
 448         size = uspi->s_cssize;
 449         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 450         base = space = kmalloc(size, GFP_KERNEL);
 451         if (!base)
 452                 goto failed;
 453         sbi->s_csp = (struct ufs_csum *)space;
 454         for (i = 0; i < blks; i += uspi->s_fpb) {
 455                 size = uspi->s_bsize;
 456                 if (i + uspi->s_fpb > blks)
 457                         size = (blks - i) * uspi->s_fsize;
 458
 459                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 460
 461                 if (!ubh)
 462                         goto failed;
 463
 464                 ubh_ubhcpymem (space, ubh, size);
 465
 466                 space += size;
 467                 ubh_brelse (ubh);
 468                 ubh = NULL;
 469         }
 470
 471         /*
 472          * Read cylinder group (we read only first fragment from block
 473          * at this time) and prepare internal data structures for cg caching.
 474          */
 475         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 476                 goto failed;
 477         for (i = 0; i < uspi->s_ncg; i++)
 478                 sbi->s_ucg[i] = NULL;
 479         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 480                 sbi->s_ucpi[i] = NULL;
 481                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 482         }
 483         for (i = 0; i < uspi->s_ncg; i++) {
 484                 UFSD("read cg %u\n", i);
 485                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 486                         goto failed;
 487                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 488                         goto failed;
 489
 490                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 491         }
 492         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 493                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 494                         goto failed;
 495                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 496         }
 497         sbi->s_cg_loaded = 0;
 498         UFSD("EXIT\n");
 499         return 1;
 500
 501 failed:
 502         kfree (base);
 503         if (sbi->s_ucg) {
 504                 for (i = 0; i < uspi->s_ncg; i++)
 505                         if (sbi->s_ucg[i])
 506                                 brelse (sbi->s_ucg[i]);
 507                 kfree (sbi->s_ucg);
 508                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 509                         kfree (sbi->s_ucpi[i]);
 510         }
 511         UFSD("EXIT (FAILED)\n");
 512         return 0;
 513 }
 514
 515 /*
 516  * Sync our internal copy of fs_cstotal with disk
 517  */
 518 static void ufs_put_cstotal(struct super_block *sb)
 519 {
 520         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 521         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 522         struct ufs_super_block_first *usb1;
 523         struct ufs_super_block_second *usb2;
 524         struct ufs_super_block_third *usb3;
 525
 526         UFSD("ENTER\n");
 527         usb1 = ubh_get_usb_first(uspi);
 528         usb2 = ubh_get_usb_second(uspi);
 529         usb3 = ubh_get_usb_third(uspi);
 530
 531         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 532              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 533             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 534                 /*we have statistic in different place, then usual*/
 535                 usb2->fs_un.fs_u2.cs_ndir =
 536                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 537                 usb2->fs_un.fs_u2.cs_nbfree =
 538                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 539                 usb3->fs_un1.fs_u2.cs_nifree =
 540                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 541                 usb3->fs_un1.fs_u2.cs_nffree =
 542                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 543         } else {
 544                 usb1->fs_cstotal.cs_ndir =
 545                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 546                 usb1->fs_cstotal.cs_nbfree =
 547                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 548                 usb1->fs_cstotal.cs_nifree =
 549                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 550                 usb1->fs_cstotal.cs_nffree =
 551                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 552         }
 553         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 554         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 555         UFSD("EXIT\n");
 556 }
 557
 558 /**
 559  * ufs_put_super_internal() - put on-disk intrenal structures
 560  * @sb: pointer to super_block structure
 561  * Put on-disk structures associated with cylinder groups
 562  * and write them back to disk, also update cs_total on disk
 563  */
 564 static void ufs_put_super_internal(struct super_block *sb)
 565 {
 566         struct ufs_sb_info *sbi = UFS_SB(sb);
 567         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 568         struct ufs_buffer_head * ubh;
 569         unsigned char * base, * space;
 570         unsigned blks, size, i;
 571
 572
 573         UFSD("ENTER\n");
 574         ufs_put_cstotal(sb);
 575         size = uspi->s_cssize;
 576         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 577         base = space = (char*) sbi->s_csp;
 578         for (i = 0; i < blks; i += uspi->s_fpb) {
 579                 size = uspi->s_bsize;
 580                 if (i + uspi->s_fpb > blks)
 581                         size = (blks - i) * uspi->s_fsize;
 582
 583                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 584
 585                 ubh_memcpyubh (ubh, space, size);
 586                 space += size;
 587                 ubh_mark_buffer_uptodate (ubh, 1);
 588                 ubh_mark_buffer_dirty (ubh);
 589                 ubh_brelse (ubh);
 590         }
 591         for (i = 0; i < sbi->s_cg_loaded; i++) {
 592                 ufs_put_cylinder (sb, i);
 593                 kfree (sbi->s_ucpi[i]);
 594         }
 595         for (; i < UFS_MAX_GROUP_LOADED; i++)
 596                 kfree (sbi->s_ucpi[i]);
 597         for (i = 0; i < uspi->s_ncg; i++)
 598                 brelse (sbi->s_ucg[i]);
 599         kfree (sbi->s_ucg);
 600         kfree (base);
 601         UFSD("EXIT\n");
 602 }
 603
 604 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 605 {
 606         struct ufs_sb_info * sbi;
 607         struct ufs_sb_private_info * uspi;
 608         struct ufs_super_block_first * usb1;
 609         struct ufs_super_block_second * usb2;
 610         struct ufs_super_block_third * usb3;
 611         struct ufs_buffer_head * ubh;
 612         struct inode *inode;
 613         unsigned block_size, super_block_size;
 614         unsigned flags;
 615         unsigned super_block_offset;
 616
 617         uspi = NULL;
 618         ubh = NULL;
 619         flags = 0;
 620
 621         UFSD("ENTER\n");
 622
 623         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 624         if (!sbi)
 625                 goto failed_nomem;
 626         sb->s_fs_info = sbi;
 627
 628         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 629
 630 #ifndef CONFIG_UFS_FS_WRITE
 631         if (!(sb->s_flags & MS_RDONLY)) {
 632                 printk("ufs was compiled with read-only support, "
 633                 "can't be mounted as read-write\n");
 634                 goto failed;
 635         }
 636 #endif
 637         /*
 638          * Set default mount options
 639          * Parse mount options
 640          */
 641         sbi->s_mount_opt = 0;
 642         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 643         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 644                 printk("wrong mount options\n");
 645                 goto failed;
 646         }
 647         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 648                 if (!silent)
 649                         printk("You didn't specify the type of your ufs filesystem\n\n"
 650                         "mount -t ufs -o ufstype="
 651                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 652                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 653                         "default is ufstype=old\n");
 654                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 655         }
 656
 657         sbi->s_uspi = uspi =
 658                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 659         if (!uspi)
 660                 goto failed;
 661         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 662         super_block_offset=UFS_SBLOCK;
 663
 664         /* Keep 2Gig file limit. Some UFS variants need to override
 665            this but as I don't know which I'll let those in the know loosen
 666            the rules */
 667         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 668         case UFS_MOUNT_UFSTYPE_44BSD:
 669                 UFSD("ufstype=44bsd\n");
 670                 uspi->s_fsize = block_size = 512;
 671                 uspi->s_fmask = ~(512 - 1);
 672                 uspi->s_fshift = 9;
 673                 uspi->s_sbsize = super_block_size = 1536;
 674                 uspi->s_sbbase = 0;
 675                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 676                 break;
 677         case UFS_MOUNT_UFSTYPE_UFS2:
 678                 UFSD("ufstype=ufs2\n");
 679                 super_block_offset=SBLOCK_UFS2;
 680                 uspi->s_fsize = block_size = 512;
 681                 uspi->s_fmask = ~(512 - 1);
 682                 uspi->s_fshift = 9;
 683                 uspi->s_sbsize = super_block_size = 1536;
 684                 uspi->s_sbbase =  0;
 685                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 686                 break;
 687
 688         case UFS_MOUNT_UFSTYPE_SUN:
 689                 UFSD("ufstype=sun\n");
 690                 uspi->s_fsize = block_size = 1024;
 691                 uspi->s_fmask = ~(1024 - 1);
 692                 uspi->s_fshift = 10;
 693                 uspi->s_sbsize = super_block_size = 2048;
 694                 uspi->s_sbbase = 0;
 695                 uspi->s_maxsymlinklen = 56;
 696                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 697                 break;
 698
 699         case UFS_MOUNT_UFSTYPE_SUNx86:
 700                 UFSD("ufstype=sunx86\n");
 701                 uspi->s_fsize = block_size = 1024;
 702                 uspi->s_fmask = ~(1024 - 1);
 703                 uspi->s_fshift = 10;
 704                 uspi->s_sbsize = super_block_size = 2048;
 705                 uspi->s_sbbase = 0;
 706                 uspi->s_maxsymlinklen = 56;
 707                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 708                 break;
 709
 710         case UFS_MOUNT_UFSTYPE_OLD:
 711                 UFSD("ufstype=old\n");
 712                 uspi->s_fsize = block_size = 1024;
 713                 uspi->s_fmask = ~(1024 - 1);
 714                 uspi->s_fshift = 10;
 715                 uspi->s_sbsize = super_block_size = 2048;
 716                 uspi->s_sbbase = 0;
 717                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 718                 if (!(sb->s_flags & MS_RDONLY)) {
 719                         if (!silent)
 720                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 721                         sb->s_flags |= MS_RDONLY;
 722                 }
 723                 break;
 724
 725         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 726                 /*TODO: check may be we need set special dir block size?*/
 727                 UFSD("ufstype=nextstep\n");
 728                 uspi->s_fsize = block_size = 1024;
 729                 uspi->s_fmask = ~(1024 - 1);
 730                 uspi->s_fshift = 10;
 731                 uspi->s_sbsize = super_block_size = 2048;
 732                 uspi->s_sbbase = 0;
 733                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 734                 if (!(sb->s_flags & MS_RDONLY)) {
 735                         if (!silent)
 736                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 737                         sb->s_flags |= MS_RDONLY;
 738                 }
 739                 break;
 740
 741         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 742                 /*TODO: check may be we need set special dir block size?*/
 743                 UFSD("ufstype=nextstep-cd\n");
 744                 uspi->s_fsize = block_size = 2048;
 745                 uspi->s_fmask = ~(2048 - 1);
 746                 uspi->s_fshift = 11;
 747                 uspi->s_sbsize = super_block_size = 2048;
 748                 uspi->s_sbbase = 0;
 749                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 750                 if (!(sb->s_flags & MS_RDONLY)) {
 751                         if (!silent)
 752                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 753                         sb->s_flags |= MS_RDONLY;
 754                 }
 755                 break;
 756
 757         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 758                 UFSD("ufstype=openstep\n");
 759                 uspi->s_fsize = block_size = 1024;
 760                 uspi->s_fmask = ~(1024 - 1);
 761                 uspi->s_fshift = 10;
 762                 uspi->s_sbsize = super_block_size = 2048;
 763                 uspi->s_sbbase = 0;
 764                 uspi->s_dirblksize = 1024;
 765                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 766                 if (!(sb->s_flags & MS_RDONLY)) {
 767                         if (!silent)
 768                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 769                         sb->s_flags |= MS_RDONLY;
 770                 }
 771                 break;
 772
 773         case UFS_MOUNT_UFSTYPE_HP:
 774                 UFSD("ufstype=hp\n");
 775                 uspi->s_fsize = block_size = 1024;
 776                 uspi->s_fmask = ~(1024 - 1);
 777                 uspi->s_fshift = 10;
 778                 uspi->s_sbsize = super_block_size = 2048;
 779                 uspi->s_sbbase = 0;
 780                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 781                 if (!(sb->s_flags & MS_RDONLY)) {
 782                         if (!silent)
 783                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 784                         sb->s_flags |= MS_RDONLY;
 785                 }
 786                 break;
 787         default:
 788                 if (!silent)
 789                         printk("unknown ufstype\n");
 790                 goto failed;
 791         }
 792
 793 again:
 794         if (!sb_set_blocksize(sb, block_size)) {
 795                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 796                 goto failed;
 797         }
 798
 799         /*
 800          * read ufs super block from device
 801          */
 802
 803         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 804
 805         if (!ubh)
 806             goto failed;
 807
 808
 809         usb1 = ubh_get_usb_first(uspi);
 810         usb2 = ubh_get_usb_second(uspi);
 811         usb3 = ubh_get_usb_third(uspi);
 812
 813         /*
 814          * Check ufs magic number
 815          */
 816         sbi->s_bytesex = BYTESEX_LE;
 817         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 818                 case UFS_MAGIC:
 819                 case UFS2_MAGIC:
 820                 case UFS_MAGIC_LFN:
 821                 case UFS_MAGIC_FEA:
 822                 case UFS_MAGIC_4GB:
 823                         goto magic_found;
 824         }
 825         sbi->s_bytesex = BYTESEX_BE;
 826         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 827                 case UFS_MAGIC:
 828                 case UFS2_MAGIC:
 829                 case UFS_MAGIC_LFN:
 830                 case UFS_MAGIC_FEA:
 831                 case UFS_MAGIC_4GB:
 832                         goto magic_found;
 833         }
 834
 835         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 836           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 837           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 838           && uspi->s_sbbase < 256) {
 839                 ubh_brelse_uspi(uspi);
 840                 ubh = NULL;
 841                 uspi->s_sbbase += 8;
 842                 goto again;
 843         }
 844         if (!silent)
 845                 printk("ufs_read_super: bad magic number\n");
 846         goto failed;
 847
 848 magic_found:
 849         /*
 850          * Check block and fragment sizes
 851          */
 852         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 853         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 854         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 855         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 856         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 857
 858         if (!is_power_of_2(uspi->s_fsize)) {
 859                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 860                         uspi->s_fsize);
 861                         goto failed;
 862         }
 863         if (uspi->s_fsize < 512) {
 864                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 865                         uspi->s_fsize);
 866                 goto failed;
 867         }
 868         if (uspi->s_fsize > 4096) {
 869                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 870                         uspi->s_fsize);
 871                 goto failed;
 872         }
 873         if (!is_power_of_2(uspi->s_bsize)) {
 874                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 875                         uspi->s_bsize);
 876                 goto failed;
 877         }
 878         if (uspi->s_bsize < 4096) {
 879                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 880                         uspi->s_bsize);
 881                 goto failed;
 882         }
 883         if (uspi->s_bsize / uspi->s_fsize > 8) {
 884                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 885                         uspi->s_bsize / uspi->s_fsize);
 886                 goto failed;
 887         }
 888         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 889                 ubh_brelse_uspi(uspi);
 890                 ubh = NULL;
 891                 block_size = uspi->s_fsize;
 892                 super_block_size = uspi->s_sbsize;
 893                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 894                 goto again;
 895         }
 896
 897         sbi->s_flags = flags;/*after that line some functions use s_flags*/
 898         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 899
 900         /*
 901          * Check, if file system was correctly unmounted.
 902          * If not, make it read only.
 903          */
 904         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 905           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 906           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 907           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 908           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 909                 switch(usb1->fs_clean) {
 910                 case UFS_FSCLEAN:
 911                         UFSD("fs is clean\n");
 912                         break;
 913                 case UFS_FSSTABLE:
 914                         UFSD("fs is stable\n");
 915                         break;
 916                 case UFS_FSOSF1:
 917                         UFSD("fs is DEC OSF/1\n");
 918                         break;
 919                 case UFS_FSACTIVE:
 920                         printk("ufs_read_super: fs is active\n");
 921                         sb->s_flags |= MS_RDONLY;
 922                         break;
 923                 case UFS_FSBAD:
 924                         printk("ufs_read_super: fs is bad\n");
 925                         sb->s_flags |= MS_RDONLY;
 926                         break;
 927                 default:
 928                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 929                         sb->s_flags |= MS_RDONLY;
 930                         break;
 931                 }
 932         } else {
 933                 printk("ufs_read_super: fs needs fsck\n");
 934                 sb->s_flags |= MS_RDONLY;
 935         }
 936
 937         /*
 938          * Read ufs_super_block into internal data structures
 939          */
 940         sb->s_op = &ufs_super_ops;
 941         sb->dq_op = NULL; /***/
 942         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 943
 944         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 945         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 946         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 947         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 948         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 949         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 950
 951         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 952                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
 953                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
 954         } else {
 955                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 956                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 957         }
 958
 959         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 960         /* s_bsize already set */
 961         /* s_fsize already set */
 962         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 963         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 964         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 965         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 966         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 967         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 968         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
 969                 uspi->s_fshift);
 970         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 971         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 972         /* s_sbsize already set */
 973         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 974         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 975         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 976         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 977         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 978         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 979         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 980         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 981
 982         if (uspi->fs_magic == UFS2_MAGIC)
 983                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
 984         else
 985                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 986
 987         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 988         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 989         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 990         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 991         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 992         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 993         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 994         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
 995         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
 996         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 997         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 998         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 999         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1000         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1001         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1002
1003         /*
1004          * Compute another frequently used values
1005          */
1006         uspi->s_fpbmask = uspi->s_fpb - 1;
1007         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1008                 uspi->s_apbshift = uspi->s_bshift - 3;
1009         else
1010                 uspi->s_apbshift = uspi->s_bshift - 2;
1011
1012         uspi->s_2apbshift = uspi->s_apbshift * 2;
1013         uspi->s_3apbshift = uspi->s_apbshift * 3;
1014         uspi->s_apb = 1 << uspi->s_apbshift;
1015         uspi->s_2apb = 1 << uspi->s_2apbshift;
1016         uspi->s_3apb = 1 << uspi->s_3apbshift;
1017         uspi->s_apbmask = uspi->s_apb - 1;
1018         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1019         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1020         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1021         uspi->s_bpf = uspi->s_fsize << 3;
1022         uspi->s_bpfshift = uspi->s_fshift + 3;
1023         uspi->s_bpfmask = uspi->s_bpf - 1;
1024         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
1025             UFS_MOUNT_UFSTYPE_44BSD)
1026                 uspi->s_maxsymlinklen =
1027                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1028
1029         inode = iget(sb, UFS_ROOTINO);
1030         if (!inode || is_bad_inode(inode))
1031                 goto failed;
1032         sb->s_root = d_alloc_root(inode);
1033         if (!sb->s_root)
1034                 goto dalloc_failed;
1035
1036         ufs_setup_cstotal(sb);
1037         /*
1038          * Read cylinder group structures
1039          */
1040         if (!(sb->s_flags & MS_RDONLY))
1041                 if (!ufs_read_cylinder_structures(sb))
1042                         goto failed;
1043
1044         UFSD("EXIT\n");
1045         return 0;
1046
1047 dalloc_failed:
1048         iput(inode);
1049 failed:
1050         if (ubh)
1051                 ubh_brelse_uspi (uspi);
1052         kfree (uspi);
1053         kfree(sbi);
1054         sb->s_fs_info = NULL;
1055         UFSD("EXIT (FAILED)\n");
1056         return -EINVAL;
1057
1058 failed_nomem:
1059         UFSD("EXIT (NOMEM)\n");
1060         return -ENOMEM;
1061 }
1062
1063 static void ufs_write_super(struct super_block *sb)
1064 {
1065         struct ufs_sb_private_info * uspi;
1066         struct ufs_super_block_first * usb1;
1067         struct ufs_super_block_third * usb3;
1068         unsigned flags;
1069
1070         lock_kernel();
1071         UFSD("ENTER\n");
1072         flags = UFS_SB(sb)->s_flags;
1073         uspi = UFS_SB(sb)->s_uspi;
1074         usb1 = ubh_get_usb_first(uspi);
1075         usb3 = ubh_get_usb_third(uspi);
1076
1077         if (!(sb->s_flags & MS_RDONLY)) {
1078                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1079                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1080                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1081                         ufs_set_fs_state(sb, usb1, usb3,
1082                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1083                 ufs_put_cstotal(sb);
1084         }
1085         sb->s_dirt = 0;
1086         UFSD("EXIT\n");
1087         unlock_kernel();
1088 }
1089
1090 static void ufs_put_super(struct super_block *sb)
1091 {
1092         struct ufs_sb_info * sbi = UFS_SB(sb);
1093
1094         UFSD("ENTER\n");
1095
1096         if (!(sb->s_flags & MS_RDONLY))
1097                 ufs_put_super_internal(sb);
1098
1099         ubh_brelse_uspi (sbi->s_uspi);
1100         kfree (sbi->s_uspi);
1101         kfree (sbi);
1102         sb->s_fs_info = NULL;
1103         UFSD("EXIT\n");
1104         return;
1105 }
1106
1107
1108 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1109 {
1110         struct ufs_sb_private_info * uspi;
1111         struct ufs_super_block_first * usb1;
1112         struct ufs_super_block_third * usb3;
1113         unsigned new_mount_opt, ufstype;
1114         unsigned flags;
1115
1116         uspi = UFS_SB(sb)->s_uspi;
1117         flags = UFS_SB(sb)->s_flags;
1118         usb1 = ubh_get_usb_first(uspi);
1119         usb3 = ubh_get_usb_third(uspi);
1120
1121         /*
1122          * Allow the "check" option to be passed as a remount option.
1123          * It is not possible to change ufstype option during remount
1124          */
1125         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1126         new_mount_opt = 0;
1127         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1128         if (!ufs_parse_options (data, &new_mount_opt))
1129                 return -EINVAL;
1130         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1131                 new_mount_opt |= ufstype;
1132         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1133                 printk("ufstype can't be changed during remount\n");
1134                 return -EINVAL;
1135         }
1136
1137         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1138                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1139                 return 0;
1140         }
1141
1142         /*
1143          * fs was mouted as rw, remounting ro
1144          */
1145         if (*mount_flags & MS_RDONLY) {
1146                 ufs_put_super_internal(sb);
1147                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1148                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1149                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1150                         ufs_set_fs_state(sb, usb1, usb3,
1151                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1152                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1153                 sb->s_dirt = 0;
1154                 sb->s_flags |= MS_RDONLY;
1155         } else {
1156         /*
1157          * fs was mounted as ro, remounting rw
1158          */
1159 #ifndef CONFIG_UFS_FS_WRITE
1160                 printk("ufs was compiled with read-only support, "
1161                 "can't be mounted as read-write\n");
1162                 return -EINVAL;
1163 #else
1164                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1165                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1166                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1167                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1168                         printk("this ufstype is read-only supported\n");
1169                         return -EINVAL;
1170                 }
1171                 if (!ufs_read_cylinder_structures(sb)) {
1172                         printk("failed during remounting\n");
1173                         return -EPERM;
1174                 }
1175                 sb->s_flags &= ~MS_RDONLY;
1176 #endif
1177         }
1178         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1179         return 0;
1180 }
1181
1182 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1183 {
1184         struct super_block *sb = dentry->d_sb;
1185         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1186         unsigned  flags = UFS_SB(sb)->s_flags;
1187         struct ufs_super_block_first *usb1;
1188         struct ufs_super_block_second *usb2;
1189         struct ufs_super_block_third *usb3;
1190
1191         lock_kernel();
1192
1193         usb1 = ubh_get_usb_first(uspi);
1194         usb2 = ubh_get_usb_second(uspi);
1195         usb3 = ubh_get_usb_third(uspi);
1196
1197         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1198                 buf->f_type = UFS2_MAGIC;
1199                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1200         } else {
1201                 buf->f_type = UFS_MAGIC;
1202                 buf->f_blocks = uspi->s_dsize;
1203         }
1204         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1205                 uspi->cs_total.cs_nffree;
1206         buf->f_ffree = uspi->cs_total.cs_nifree;
1207         buf->f_bsize = sb->s_blocksize;
1208         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1209                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1210         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1211         buf->f_namelen = UFS_MAXNAMLEN;
1212
1213         unlock_kernel();
1214
1215         return 0;
1216 }
1217
1218 static struct kmem_cache * ufs_inode_cachep;
1219
1220 static struct inode *ufs_alloc_inode(struct super_block *sb)
1221 {
1222         struct ufs_inode_info *ei;
1223         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1224         if (!ei)
1225                 return NULL;
1226         ei->vfs_inode.i_version = 1;
1227         return &ei->vfs_inode;
1228 }
1229
1230 static void ufs_destroy_inode(struct inode *inode)
1231 {
1232         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1233 }
1234
1235 static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
1236 {
1237         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1238
1239         inode_init_once(&ei->vfs_inode);
1240 }
1241
1242 static int init_inodecache(void)
1243 {
1244         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1245                                              sizeof(struct ufs_inode_info),
1246                                              0, (SLAB_RECLAIM_ACCOUNT|
1247                                                 SLAB_MEM_SPREAD),
1248                                              init_once);
1249         if (ufs_inode_cachep == NULL)
1250                 return -ENOMEM;
1251         return 0;
1252 }
1253
1254 static void destroy_inodecache(void)
1255 {
1256         kmem_cache_destroy(ufs_inode_cachep);
1257 }
1258
1259 #ifdef CONFIG_QUOTA
1260 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1261 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1262 #endif
1263
1264 static const struct super_operations ufs_super_ops = {
1265         .alloc_inode    = ufs_alloc_inode,
1266         .destroy_inode  = ufs_destroy_inode,
1267         .read_inode     = ufs_read_inode,
1268         .write_inode    = ufs_write_inode,
1269         .delete_inode   = ufs_delete_inode,
1270         .put_super      = ufs_put_super,
1271         .write_super    = ufs_write_super,
1272         .statfs         = ufs_statfs,
1273         .remount_fs     = ufs_remount,
1274 #ifdef CONFIG_QUOTA
1275         .quota_read     = ufs_quota_read,
1276         .quota_write    = ufs_quota_write,
1277 #endif
1278 };
1279
1280 #ifdef CONFIG_QUOTA
1281
1282 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1283  * acquiring the locks... As quota files are never truncated and quota code
1284  * itself serializes the operations (and noone else should touch the files)
1285  * we don't have to be afraid of races */
1286 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1287                                size_t len, loff_t off)
1288 {
1289         struct inode *inode = sb_dqopt(sb)->files[type];
1290         sector_t blk = off >> sb->s_blocksize_bits;
1291         int err = 0;
1292         int offset = off & (sb->s_blocksize - 1);
1293         int tocopy;
1294         size_t toread;
1295         struct buffer_head *bh;
1296         loff_t i_size = i_size_read(inode);
1297
1298         if (off > i_size)
1299                 return 0;
1300         if (off+len > i_size)
1301                 len = i_size-off;
1302         toread = len;
1303         while (toread > 0) {
1304                 tocopy = sb->s_blocksize - offset < toread ?
1305                                 sb->s_blocksize - offset : toread;
1306
1307                 bh = ufs_bread(inode, blk, 0, &err);
1308                 if (err)
1309                         return err;
1310                 if (!bh)        /* A hole? */
1311                         memset(data, 0, tocopy);
1312                 else {
1313                         memcpy(data, bh->b_data+offset, tocopy);
1314                         brelse(bh);
1315                 }
1316                 offset = 0;
1317                 toread -= tocopy;
1318                 data += tocopy;
1319                 blk++;
1320         }
1321         return len;
1322 }
1323
1324 /* Write to quotafile */
1325 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1326                                 const char *data, size_t len, loff_t off)
1327 {
1328         struct inode *inode = sb_dqopt(sb)->files[type];
1329         sector_t blk = off >> sb->s_blocksize_bits;
1330         int err = 0;
1331         int offset = off & (sb->s_blocksize - 1);
1332         int tocopy;
1333         size_t towrite = len;
1334         struct buffer_head *bh;
1335
1336         mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
1337         while (towrite > 0) {
1338                 tocopy = sb->s_blocksize - offset < towrite ?
1339                                 sb->s_blocksize - offset : towrite;
1340
1341                 bh = ufs_bread(inode, blk, 1, &err);
1342                 if (!bh)
1343                         goto out;
1344                 lock_buffer(bh);
1345                 memcpy(bh->b_data+offset, data, tocopy);
1346                 flush_dcache_page(bh->b_page);
1347                 set_buffer_uptodate(bh);
1348                 mark_buffer_dirty(bh);
1349                 unlock_buffer(bh);
1350                 brelse(bh);
1351                 offset = 0;
1352                 towrite -= tocopy;
1353                 data += tocopy;
1354                 blk++;
1355         }
1356 out:
1357         if (len == towrite) {
1358                 mutex_unlock(&inode->i_mutex);
1359                 return err;
1360         }
1361         if (inode->i_size < off+len-towrite)
1362                 i_size_write(inode, off+len-towrite);
1363         inode->i_version++;
1364         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1365         mark_inode_dirty(inode);
1366         mutex_unlock(&inode->i_mutex);
1367         return len - towrite;
1368 }
1369
1370 #endif
1371
1372 static int ufs_get_sb(struct file_system_type *fs_type,
1373         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1374 {
1375         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1376 }
1377
1378 static struct file_system_type ufs_fs_type = {
1379         .owner          = THIS_MODULE,
1380         .name           = "ufs",
1381         .get_sb         = ufs_get_sb,
1382         .kill_sb        = kill_block_super,
1383         .fs_flags       = FS_REQUIRES_DEV,
1384 };
1385
1386 static int __init init_ufs_fs(void)
1387 {
1388         int err = init_inodecache();
1389         if (err)
1390                 goto out1;
1391         err = register_filesystem(&ufs_fs_type);
1392         if (err)
1393                 goto out;
1394         return 0;
1395 out:
1396         destroy_inodecache();
1397 out1:
1398         return err;
1399 }
1400
1401 static void __exit exit_ufs_fs(void)
1402 {
1403         unregister_filesystem(&ufs_fs_type);
1404         destroy_inodecache();
1405 }
1406
1407 module_init(init_ufs_fs)
1408 module_exit(exit_ufs_fs)
1409 MODULE_LICENSE("GPL");