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   1 /*
   2  *  linux/fs/ufs/super.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  */
   8
   9 /* Derived from
  10  *
  11  *  linux/fs/ext2/super.c
  12  *
  13  * Copyright (C) 1992, 1993, 1994, 1995
  14  * Remy Card (card@masi.ibp.fr)
  15  * Laboratoire MASI - Institut Blaise Pascal
  16  * Universite Pierre et Marie Curie (Paris VI)
  17  *
  18  *  from
  19  *
  20  *  linux/fs/minix/inode.c
  21  *
  22  *  Copyright (C) 1991, 1992  Linus Torvalds
  23  *
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 /*
  29  * Inspired by
  30  *
  31  *  linux/fs/ufs/super.c
  32  *
  33  * Copyright (C) 1996
  34  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
  35  * Laboratory for Computer Science Research Computing Facility
  36  * Rutgers, The State University of New Jersey
  37  *
  38  * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
  39  *
  40  * Kernel module support added on 96/04/26 by
  41  * Stefan Reinauer <stepan@home.culture.mipt.ru>
  42  *
  43  * Module usage counts added on 96/04/29 by
  44  * Gertjan van Wingerde <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  */
  65
  66
  67 #include <linux/config.h>
  68 #include <linux/module.h>
  69 #include <linux/bitops.h>
  70
  71 #include <stdarg.h>
  72
  73 #include <asm/uaccess.h>
  74 #include <asm/system.h>
  75
  76 #include <linux/errno.h>
  77 #include <linux/fs.h>
  78 #include <linux/ufs_fs.h>
  79 #include <linux/slab.h>
  80 #include <linux/time.h>
  81 #include <linux/stat.h>
  82 #include <linux/string.h>
  83 #include <linux/blkdev.h>
  84 #include <linux/init.h>
  85 #include <linux/parser.h>
  86 #include <linux/smp_lock.h>
  87 #include <linux/buffer_head.h>
  88 #include <linux/vfs.h>
  89
  90 #include "swab.h"
  91 #include "util.h"
  92
  93 #ifdef CONFIG_UFS_DEBUG
  94 /*
  95  * Print contents of ufs_super_block, useful for debugging
  96  */
  97 void ufs_print_super_stuff(struct super_block *sb,
  98         struct ufs_super_block_first * usb1,
  99         struct ufs_super_block_second * usb2,
 100         struct ufs_super_block_third * usb3)
 101 {
 102         printk("ufs_print_super_stuff\n");
 103         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
 104         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
 105         printk("  sblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 106         printk("  cblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 107         printk("  iblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 108         printk("  dblkno:        %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 109         printk("  cgoffset:      %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset));
 110         printk("  ~cgmask:       0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask));
 111         printk("  size:          %u\n", fs32_to_cpu(sb, usb1->fs_size));
 112         printk("  dsize:         %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 113         printk("  ncg:           %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 114         printk("  bsize:         %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 115         printk("  fsize:         %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 116         printk("  frag:          %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 117         printk("  fragshift:     %u\n", fs32_to_cpu(sb, usb1->fs_fragshift));
 118         printk("  ~fmask:        %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 119         printk("  fshift:        %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 120         printk("  sbsize:        %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 121         printk("  spc:           %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 122         printk("  cpg:           %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 123         printk("  ipg:           %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 124         printk("  fpg:           %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 125         printk("  csaddr:        %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 126         printk("  cssize:        %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 127         printk("  cgsize:        %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 128         printk("  fstodb:        %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb));
 129         printk("  contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize));
 130         printk("  postblformat:  %u\n", fs32_to_cpu(sb, usb3->fs_postblformat));
 131         printk("  nrpos:         %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 132         printk("  ndir           %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 133         printk("  nifree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 134         printk("  nbfree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 135         printk("  nffree         %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 136         printk("\n");
 137 }
 138
 139 /*
 140  * Print contents of ufs2 ufs_super_block, useful for debugging
 141  */
 142 void ufs2_print_super_stuff(
 143      struct super_block *sb,
 144       struct ufs_super_block *usb)
 145 {
 146         printk("ufs_print_super_stuff\n");
 147         printk("size of usb:     %u\n", sizeof(struct ufs_super_block));
 148         printk("  magic:         0x%x\n", fs32_to_cpu(sb, usb->fs_magic));
 149         printk("  fs_size:   %llu\n",
 150                (unsigned long long)fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size));
 151         printk("  fs_dsize:  %llu\n",
 152                (unsigned long long)fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize));
 153         printk("  bsize:         %u\n", fs32_to_cpu(sb, usb->fs_bsize));
 154         printk("  fsize:         %u\n", fs32_to_cpu(sb, usb->fs_fsize));
 155         printk("  fs_volname:  %s\n", usb->fs_u11.fs_u2.fs_volname);
 156         printk("  fs_fsmnt:  %s\n", usb->fs_u11.fs_u2.fs_fsmnt);
 157         printk("  fs_sblockloc: %llu\n",
 158                (unsigned long long)fs64_to_cpu(sb,
 159                                                usb->fs_u11.fs_u2.fs_sblockloc));
 160         printk("  cs_ndir(No of dirs):  %llu\n",
 161                (unsigned long long)fs64_to_cpu(sb,
 162                                          usb->fs_u11.fs_u2.fs_cstotal.cs_ndir));
 163         printk("  cs_nbfree(No of free blocks):  %llu\n",
 164                (unsigned long long)fs64_to_cpu(sb,
 165                                        usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree));
 166         printk("\n");
 167 }
 168
 169 /*
 170  * Print contents of ufs_cylinder_group, useful for debugging
 171  */
 172 void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg)
 173 {
 174         printk("\nufs_print_cylinder_stuff\n");
 175         printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group));
 176         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 177         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 178         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 179         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 180         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 181         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 182         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 183         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 184         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 185         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 186         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 187         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 188         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 189         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 190             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 191             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 192             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 193             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 194         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 195         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 196         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 197         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 198         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 199         printk("  clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 200         printk("  clusteroff    %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 201         printk("  nclusterblks  %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 202         printk("\n");
 203 }
 204 #endif /* CONFIG_UFS_DEBUG */
 205
 206 static struct super_operations ufs_super_ops;
 207
 208 static char error_buf[1024];
 209
 210 void ufs_error (struct super_block * sb, const char * function,
 211         const char * fmt, ...)
 212 {
 213         struct ufs_sb_private_info * uspi;
 214         struct ufs_super_block_first * usb1;
 215         va_list args;
 216
 217         uspi = UFS_SB(sb)->s_uspi;
 218         usb1 = ubh_get_usb_first(uspi);
 219
 220         if (!(sb->s_flags & MS_RDONLY)) {
 221                 usb1->fs_clean = UFS_FSBAD;
 222                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 223                 sb->s_dirt = 1;
 224                 sb->s_flags |= MS_RDONLY;
 225         }
 226         va_start (args, fmt);
 227         vsprintf (error_buf, fmt, args);
 228         va_end (args);
 229         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 230         case UFS_MOUNT_ONERROR_PANIC:
 231                 panic ("UFS-fs panic (device %s): %s: %s\n",
 232                         sb->s_id, function, error_buf);
 233
 234         case UFS_MOUNT_ONERROR_LOCK:
 235         case UFS_MOUNT_ONERROR_UMOUNT:
 236         case UFS_MOUNT_ONERROR_REPAIR:
 237                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 238                         sb->s_id, function, error_buf);
 239         }
 240 }
 241
 242 void ufs_panic (struct super_block * sb, const char * function,
 243         const char * fmt, ...)
 244 {
 245         struct ufs_sb_private_info * uspi;
 246         struct ufs_super_block_first * usb1;
 247         va_list args;
 248
 249         uspi = UFS_SB(sb)->s_uspi;
 250         usb1 = ubh_get_usb_first(uspi);
 251
 252         if (!(sb->s_flags & MS_RDONLY)) {
 253                 usb1->fs_clean = UFS_FSBAD;
 254                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 255                 sb->s_dirt = 1;
 256         }
 257         va_start (args, fmt);
 258         vsprintf (error_buf, fmt, args);
 259         va_end (args);
 260         sb->s_flags |= MS_RDONLY;
 261         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 262                 sb->s_id, function, error_buf);
 263 }
 264
 265 void ufs_warning (struct super_block * sb, const char * function,
 266         const char * fmt, ...)
 267 {
 268         va_list args;
 269
 270         va_start (args, fmt);
 271         vsprintf (error_buf, fmt, args);
 272         va_end (args);
 273         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 274                 sb->s_id, function, error_buf);
 275 }
 276
 277 enum {
 278         Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
 279         Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
 280         Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
 281         Opt_onerror_umount, Opt_onerror_repair, Opt_err
 282 };
 283
 284 static match_table_t tokens = {
 285         {Opt_type_old, "ufstype=old"},
 286         {Opt_type_sunx86, "ufstype=sunx86"},
 287         {Opt_type_sun, "ufstype=sun"},
 288         {Opt_type_44bsd, "ufstype=44bsd"},
 289         {Opt_type_ufs2, "ufstype=ufs2"},
 290         {Opt_type_ufs2, "ufstype=5xbsd"},
 291         {Opt_type_hp, "ufstype=hp"},
 292         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 293         {Opt_type_nextstep, "ufstype=nextstep"},
 294         {Opt_type_openstep, "ufstype=openstep"},
 295         {Opt_onerror_panic, "onerror=panic"},
 296         {Opt_onerror_lock, "onerror=lock"},
 297         {Opt_onerror_umount, "onerror=umount"},
 298         {Opt_onerror_repair, "onerror=repair"},
 299         {Opt_err, NULL}
 300 };
 301
 302 static int ufs_parse_options (char * options, unsigned * mount_options)
 303 {
 304         char * p;
 305
 306         UFSD("ENTER\n");
 307
 308         if (!options)
 309                 return 1;
 310
 311         while ((p = strsep(&options, ",")) != NULL) {
 312                 substring_t args[MAX_OPT_ARGS];
 313                 int token;
 314                 if (!*p)
 315                         continue;
 316
 317                 token = match_token(p, tokens, args);
 318                 switch (token) {
 319                 case Opt_type_old:
 320                         ufs_clear_opt (*mount_options, UFSTYPE);
 321                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 322                         break;
 323                 case Opt_type_sunx86:
 324                         ufs_clear_opt (*mount_options, UFSTYPE);
 325                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 326                         break;
 327                 case Opt_type_sun:
 328                         ufs_clear_opt (*mount_options, UFSTYPE);
 329                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 330                         break;
 331                 case Opt_type_44bsd:
 332                         ufs_clear_opt (*mount_options, UFSTYPE);
 333                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 334                         break;
 335                 case Opt_type_ufs2:
 336                         ufs_clear_opt(*mount_options, UFSTYPE);
 337                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 338                         break;
 339                 case Opt_type_hp:
 340                         ufs_clear_opt (*mount_options, UFSTYPE);
 341                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 342                         break;
 343                 case Opt_type_nextstepcd:
 344                         ufs_clear_opt (*mount_options, UFSTYPE);
 345                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 346                         break;
 347                 case Opt_type_nextstep:
 348                         ufs_clear_opt (*mount_options, UFSTYPE);
 349                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 350                         break;
 351                 case Opt_type_openstep:
 352                         ufs_clear_opt (*mount_options, UFSTYPE);
 353                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 354                         break;
 355                 case Opt_onerror_panic:
 356                         ufs_clear_opt (*mount_options, ONERROR);
 357                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 358                         break;
 359                 case Opt_onerror_lock:
 360                         ufs_clear_opt (*mount_options, ONERROR);
 361                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 362                         break;
 363                 case Opt_onerror_umount:
 364                         ufs_clear_opt (*mount_options, ONERROR);
 365                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 366                         break;
 367                 case Opt_onerror_repair:
 368                         printk("UFS-fs: Unable to do repair on error, "
 369                                 "will lock lock instead\n");
 370                         ufs_clear_opt (*mount_options, ONERROR);
 371                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 372                         break;
 373                 default:
 374                         printk("UFS-fs: Invalid option: \"%s\" "
 375                                         "or missing value\n", p);
 376                         return 0;
 377                 }
 378         }
 379         return 1;
 380 }
 381
 382 /*
 383  * Read on-disk structures associated with cylinder groups
 384  */
 385 static int ufs_read_cylinder_structures (struct super_block *sb)
 386 {
 387         struct ufs_sb_info * sbi = UFS_SB(sb);
 388         struct ufs_sb_private_info * uspi;
 389         struct ufs_super_block *usb;
 390         struct ufs_buffer_head * ubh;
 391         unsigned char * base, * space;
 392         unsigned size, blks, i;
 393         unsigned flags = 0;
 394
 395         UFSD("ENTER\n");
 396
 397         uspi = sbi->s_uspi;
 398
 399         usb  = (struct ufs_super_block *)
 400                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data;
 401
 402         flags = UFS_SB(sb)->s_flags;
 403
 404         /*
 405          * Read cs structures from (usually) first data block
 406          * on the device.
 407          */
 408         size = uspi->s_cssize;
 409         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 410         base = space = kmalloc(size, GFP_KERNEL);
 411         if (!base)
 412                 goto failed;
 413         sbi->s_csp = (struct ufs_csum *)space;
 414         for (i = 0; i < blks; i += uspi->s_fpb) {
 415                 size = uspi->s_bsize;
 416                 if (i + uspi->s_fpb > blks)
 417                         size = (blks - i) * uspi->s_fsize;
 418
 419                 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 420                         ubh = ubh_bread(sb,
 421                                 fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size);
 422                 else
 423                         ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 424
 425                 if (!ubh)
 426                         goto failed;
 427
 428                 ubh_ubhcpymem (space, ubh, size);
 429
 430                 space += size;
 431                 ubh_brelse (ubh);
 432                 ubh = NULL;
 433         }
 434
 435         /*
 436          * Read cylinder group (we read only first fragment from block
 437          * at this time) and prepare internal data structures for cg caching.
 438          */
 439         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 440                 goto failed;
 441         for (i = 0; i < uspi->s_ncg; i++)
 442                 sbi->s_ucg[i] = NULL;
 443         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 444                 sbi->s_ucpi[i] = NULL;
 445                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 446         }
 447         for (i = 0; i < uspi->s_ncg; i++) {
 448                 UFSD("read cg %u\n", i);
 449                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 450                         goto failed;
 451                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 452                         goto failed;
 453 #ifdef CONFIG_UFS_DEBUG
 454                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 455 #endif
 456         }
 457         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 458                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 459                         goto failed;
 460                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 461         }
 462         sbi->s_cg_loaded = 0;
 463         UFSD("EXIT\n");
 464         return 1;
 465
 466 failed:
 467         kfree (base);
 468         if (sbi->s_ucg) {
 469                 for (i = 0; i < uspi->s_ncg; i++)
 470                         if (sbi->s_ucg[i])
 471                                 brelse (sbi->s_ucg[i]);
 472                 kfree (sbi->s_ucg);
 473                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 474                         kfree (sbi->s_ucpi[i]);
 475         }
 476         UFSD("EXIT (FAILED)\n");
 477         return 0;
 478 }
 479
 480 /*
 481  * Put on-disk structures associated with cylinder groups and
 482  * write them back to disk
 483  */
 484 static void ufs_put_cylinder_structures (struct super_block *sb)
 485 {
 486         struct ufs_sb_info * sbi = UFS_SB(sb);
 487         struct ufs_sb_private_info * uspi;
 488         struct ufs_buffer_head * ubh;
 489         unsigned char * base, * space;
 490         unsigned blks, size, i;
 491
 492         UFSD("ENTER\n");
 493
 494         uspi = sbi->s_uspi;
 495
 496         size = uspi->s_cssize;
 497         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 498         base = space = (char*) sbi->s_csp;
 499         for (i = 0; i < blks; i += uspi->s_fpb) {
 500                 size = uspi->s_bsize;
 501                 if (i + uspi->s_fpb > blks)
 502                         size = (blks - i) * uspi->s_fsize;
 503                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 504                 ubh_memcpyubh (ubh, space, size);
 505                 space += size;
 506                 ubh_mark_buffer_uptodate (ubh, 1);
 507                 ubh_mark_buffer_dirty (ubh);
 508                 ubh_brelse (ubh);
 509         }
 510         for (i = 0; i < sbi->s_cg_loaded; i++) {
 511                 ufs_put_cylinder (sb, i);
 512                 kfree (sbi->s_ucpi[i]);
 513         }
 514         for (; i < UFS_MAX_GROUP_LOADED; i++)
 515                 kfree (sbi->s_ucpi[i]);
 516         for (i = 0; i < uspi->s_ncg; i++)
 517                 brelse (sbi->s_ucg[i]);
 518         kfree (sbi->s_ucg);
 519         kfree (base);
 520         UFSD("EXIT\n");
 521 }
 522
 523 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 524 {
 525         struct ufs_sb_info * sbi;
 526         struct ufs_sb_private_info * uspi;
 527         struct ufs_super_block_first * usb1;
 528         struct ufs_super_block_second * usb2;
 529         struct ufs_super_block_third * usb3;
 530         struct ufs_super_block *usb;
 531         struct ufs_buffer_head * ubh;
 532         struct inode *inode;
 533         unsigned block_size, super_block_size;
 534         unsigned flags;
 535         unsigned super_block_offset;
 536
 537         uspi = NULL;
 538         ubh = NULL;
 539         flags = 0;
 540
 541         UFSD("ENTER\n");
 542
 543         sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 544         if (!sbi)
 545                 goto failed_nomem;
 546         sb->s_fs_info = sbi;
 547         memset(sbi, 0, sizeof(struct ufs_sb_info));
 548
 549         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 550
 551 #ifndef CONFIG_UFS_FS_WRITE
 552         if (!(sb->s_flags & MS_RDONLY)) {
 553                 printk("ufs was compiled with read-only support, "
 554                 "can't be mounted as read-write\n");
 555                 goto failed;
 556         }
 557 #endif
 558         /*
 559          * Set default mount options
 560          * Parse mount options
 561          */
 562         sbi->s_mount_opt = 0;
 563         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 564         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 565                 printk("wrong mount options\n");
 566                 goto failed;
 567         }
 568         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 569                 if (!silent)
 570                         printk("You didn't specify the type of your ufs filesystem\n\n"
 571                         "mount -t ufs -o ufstype="
 572                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 573                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 574                         "default is ufstype=old\n");
 575                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 576         }
 577
 578         sbi->s_uspi = uspi =
 579                 kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 580         if (!uspi)
 581                 goto failed;
 582
 583         super_block_offset=UFS_SBLOCK;
 584
 585         /* Keep 2Gig file limit. Some UFS variants need to override
 586            this but as I don't know which I'll let those in the know loosen
 587            the rules */
 588         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 589         case UFS_MOUNT_UFSTYPE_44BSD:
 590                 UFSD("ufstype=44bsd\n");
 591                 uspi->s_fsize = block_size = 512;
 592                 uspi->s_fmask = ~(512 - 1);
 593                 uspi->s_fshift = 9;
 594                 uspi->s_sbsize = super_block_size = 1536;
 595                 uspi->s_sbbase = 0;
 596                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 597                 break;
 598         case UFS_MOUNT_UFSTYPE_UFS2:
 599                 UFSD("ufstype=ufs2\n");
 600                 super_block_offset=SBLOCK_UFS2;
 601                 uspi->s_fsize = block_size = 512;
 602                 uspi->s_fmask = ~(512 - 1);
 603                 uspi->s_fshift = 9;
 604                 uspi->s_sbsize = super_block_size = 1536;
 605                 uspi->s_sbbase =  0;
 606                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 607                 if (!(sb->s_flags & MS_RDONLY)) {
 608                         printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
 609                         sb->s_flags |= MS_RDONLY;
 610                 }
 611                 break;
 612
 613         case UFS_MOUNT_UFSTYPE_SUN:
 614                 UFSD("ufstype=sun\n");
 615                 uspi->s_fsize = block_size = 1024;
 616                 uspi->s_fmask = ~(1024 - 1);
 617                 uspi->s_fshift = 10;
 618                 uspi->s_sbsize = super_block_size = 2048;
 619                 uspi->s_sbbase = 0;
 620                 uspi->s_maxsymlinklen = 56;
 621                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 622                 break;
 623
 624         case UFS_MOUNT_UFSTYPE_SUNx86:
 625                 UFSD("ufstype=sunx86\n");
 626                 uspi->s_fsize = block_size = 1024;
 627                 uspi->s_fmask = ~(1024 - 1);
 628                 uspi->s_fshift = 10;
 629                 uspi->s_sbsize = super_block_size = 2048;
 630                 uspi->s_sbbase = 0;
 631                 uspi->s_maxsymlinklen = 56;
 632                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 633                 break;
 634
 635         case UFS_MOUNT_UFSTYPE_OLD:
 636                 UFSD("ufstype=old\n");
 637                 uspi->s_fsize = block_size = 1024;
 638                 uspi->s_fmask = ~(1024 - 1);
 639                 uspi->s_fshift = 10;
 640                 uspi->s_sbsize = super_block_size = 2048;
 641                 uspi->s_sbbase = 0;
 642                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 643                 if (!(sb->s_flags & MS_RDONLY)) {
 644                         if (!silent)
 645                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 646                         sb->s_flags |= MS_RDONLY;
 647                 }
 648                 break;
 649
 650         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 651                 UFSD("ufstype=nextstep\n");
 652                 uspi->s_fsize = block_size = 1024;
 653                 uspi->s_fmask = ~(1024 - 1);
 654                 uspi->s_fshift = 10;
 655                 uspi->s_sbsize = super_block_size = 2048;
 656                 uspi->s_sbbase = 0;
 657                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 658                 if (!(sb->s_flags & MS_RDONLY)) {
 659                         if (!silent)
 660                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 661                         sb->s_flags |= MS_RDONLY;
 662                 }
 663                 break;
 664
 665         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 666                 UFSD("ufstype=nextstep-cd\n");
 667                 uspi->s_fsize = block_size = 2048;
 668                 uspi->s_fmask = ~(2048 - 1);
 669                 uspi->s_fshift = 11;
 670                 uspi->s_sbsize = super_block_size = 2048;
 671                 uspi->s_sbbase = 0;
 672                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 673                 if (!(sb->s_flags & MS_RDONLY)) {
 674                         if (!silent)
 675                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 676                         sb->s_flags |= MS_RDONLY;
 677                 }
 678                 break;
 679
 680         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 681                 UFSD("ufstype=openstep\n");
 682                 uspi->s_fsize = block_size = 1024;
 683                 uspi->s_fmask = ~(1024 - 1);
 684                 uspi->s_fshift = 10;
 685                 uspi->s_sbsize = super_block_size = 2048;
 686                 uspi->s_sbbase = 0;
 687                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 688                 if (!(sb->s_flags & MS_RDONLY)) {
 689                         if (!silent)
 690                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 691                         sb->s_flags |= MS_RDONLY;
 692                 }
 693                 break;
 694
 695         case UFS_MOUNT_UFSTYPE_HP:
 696                 UFSD("ufstype=hp\n");
 697                 uspi->s_fsize = block_size = 1024;
 698                 uspi->s_fmask = ~(1024 - 1);
 699                 uspi->s_fshift = 10;
 700                 uspi->s_sbsize = super_block_size = 2048;
 701                 uspi->s_sbbase = 0;
 702                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 703                 if (!(sb->s_flags & MS_RDONLY)) {
 704                         if (!silent)
 705                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 706                         sb->s_flags |= MS_RDONLY;
 707                 }
 708                 break;
 709         default:
 710                 if (!silent)
 711                         printk("unknown ufstype\n");
 712                 goto failed;
 713         }
 714
 715 again:
 716         if (!sb_set_blocksize(sb, block_size)) {
 717                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 718                 goto failed;
 719         }
 720
 721         /*
 722          * read ufs super block from device
 723          */
 724
 725         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 726
 727         if (!ubh)
 728             goto failed;
 729
 730
 731         usb1 = ubh_get_usb_first(uspi);
 732         usb2 = ubh_get_usb_second(uspi);
 733         usb3 = ubh_get_usb_third(uspi);
 734         usb  = (struct ufs_super_block *)
 735                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
 736
 737         /*
 738          * Check ufs magic number
 739          */
 740         sbi->s_bytesex = BYTESEX_LE;
 741         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 742                 case UFS_MAGIC:
 743                 case UFS2_MAGIC:
 744                 case UFS_MAGIC_LFN:
 745                 case UFS_MAGIC_FEA:
 746                 case UFS_MAGIC_4GB:
 747                         goto magic_found;
 748         }
 749         sbi->s_bytesex = BYTESEX_BE;
 750         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 751                 case UFS_MAGIC:
 752                 case UFS2_MAGIC:
 753                 case UFS_MAGIC_LFN:
 754                 case UFS_MAGIC_FEA:
 755                 case UFS_MAGIC_4GB:
 756                         goto magic_found;
 757         }
 758
 759         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 760           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 761           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 762           && uspi->s_sbbase < 256) {
 763                 ubh_brelse_uspi(uspi);
 764                 ubh = NULL;
 765                 uspi->s_sbbase += 8;
 766                 goto again;
 767         }
 768         if (!silent)
 769                 printk("ufs_read_super: bad magic number\n");
 770         goto failed;
 771
 772 magic_found:
 773         /*
 774          * Check block and fragment sizes
 775          */
 776         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 777         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 778         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 779         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 780         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 781
 782         if (uspi->s_fsize & (uspi->s_fsize - 1)) {
 783                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 784                         uspi->s_fsize);
 785                         goto failed;
 786         }
 787         if (uspi->s_fsize < 512) {
 788                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 789                         uspi->s_fsize);
 790                 goto failed;
 791         }
 792         if (uspi->s_fsize > 4096) {
 793                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 794                         uspi->s_fsize);
 795                 goto failed;
 796         }
 797         if (uspi->s_bsize & (uspi->s_bsize - 1)) {
 798                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 799                         uspi->s_bsize);
 800                 goto failed;
 801         }
 802         if (uspi->s_bsize < 4096) {
 803                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 804                         uspi->s_bsize);
 805                 goto failed;
 806         }
 807         if (uspi->s_bsize / uspi->s_fsize > 8) {
 808                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 809                         uspi->s_bsize / uspi->s_fsize);
 810                 goto failed;
 811         }
 812         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 813                 ubh_brelse_uspi(uspi);
 814                 ubh = NULL;
 815                 block_size = uspi->s_fsize;
 816                 super_block_size = uspi->s_sbsize;
 817                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 818                 goto again;
 819         }
 820
 821 #ifdef CONFIG_UFS_DEBUG
 822         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 823                 ufs2_print_super_stuff(sb,usb);
 824         else
 825                 ufs_print_super_stuff(sb, usb1, usb2, usb3);
 826 #endif
 827
 828         /*
 829          * Check, if file system was correctly unmounted.
 830          * If not, make it read only.
 831          */
 832         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
 833           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
 834           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
 835           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
 836           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
 837                 switch(usb1->fs_clean) {
 838                 case UFS_FSCLEAN:
 839                         UFSD("fs is clean\n");
 840                         break;
 841                 case UFS_FSSTABLE:
 842                         UFSD("fs is stable\n");
 843                         break;
 844                 case UFS_FSOSF1:
 845                         UFSD("fs is DEC OSF/1\n");
 846                         break;
 847                 case UFS_FSACTIVE:
 848                         printk("ufs_read_super: fs is active\n");
 849                         sb->s_flags |= MS_RDONLY;
 850                         break;
 851                 case UFS_FSBAD:
 852                         printk("ufs_read_super: fs is bad\n");
 853                         sb->s_flags |= MS_RDONLY;
 854                         break;
 855                 default:
 856                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
 857                         sb->s_flags |= MS_RDONLY;
 858                         break;
 859                 }
 860         }
 861         else {
 862                 printk("ufs_read_super: fs needs fsck\n");
 863                 sb->s_flags |= MS_RDONLY;
 864         }
 865
 866         /*
 867          * Read ufs_super_block into internal data structures
 868          */
 869         sb->s_op = &ufs_super_ops;
 870         sb->dq_op = NULL; /***/
 871         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 872
 873         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
 874         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
 875         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
 876         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
 877         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
 878         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
 879
 880         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 881                 uspi->s_u2_size  = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size);
 882                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
 883         }
 884         else {
 885                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
 886                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
 887         }
 888
 889         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
 890         /* s_bsize already set */
 891         /* s_fsize already set */
 892         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
 893         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
 894         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
 895         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 896         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
 897         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 898         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
 899                 uspi->s_fshift);
 900         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
 901         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
 902         /* s_sbsize already set */
 903         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
 904         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
 905         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
 906         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
 907         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
 908         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
 909         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
 910         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
 911         uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
 912         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
 913         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
 914         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
 915         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
 916         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
 917         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
 918         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
 919         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc);
 920         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize);
 921         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
 922         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
 923         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 924         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
 925         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
 926         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
 927
 928         /*
 929          * Compute another frequently used values
 930          */
 931         uspi->s_fpbmask = uspi->s_fpb - 1;
 932         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 933                 uspi->s_apbshift = uspi->s_bshift - 3;
 934         else
 935                 uspi->s_apbshift = uspi->s_bshift - 2;
 936
 937         uspi->s_2apbshift = uspi->s_apbshift * 2;
 938         uspi->s_3apbshift = uspi->s_apbshift * 3;
 939         uspi->s_apb = 1 << uspi->s_apbshift;
 940         uspi->s_2apb = 1 << uspi->s_2apbshift;
 941         uspi->s_3apb = 1 << uspi->s_3apbshift;
 942         uspi->s_apbmask = uspi->s_apb - 1;
 943         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
 944         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
 945         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
 946         uspi->s_bpf = uspi->s_fsize << 3;
 947         uspi->s_bpfshift = uspi->s_fshift + 3;
 948         uspi->s_bpfmask = uspi->s_bpf - 1;
 949         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
 950             UFS_MOUNT_UFSTYPE_44BSD)
 951                 uspi->s_maxsymlinklen =
 952                     fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen);
 953
 954         sbi->s_flags = flags;
 955
 956         inode = iget(sb, UFS_ROOTINO);
 957         if (!inode || is_bad_inode(inode))
 958                 goto failed;
 959         sb->s_root = d_alloc_root(inode);
 960         if (!sb->s_root)
 961                 goto dalloc_failed;
 962
 963
 964         /*
 965          * Read cylinder group structures
 966          */
 967         if (!(sb->s_flags & MS_RDONLY))
 968                 if (!ufs_read_cylinder_structures(sb))
 969                         goto failed;
 970
 971         UFSD("EXIT\n");
 972         return 0;
 973
 974 dalloc_failed:
 975         iput(inode);
 976 failed:
 977         if (ubh)
 978                 ubh_brelse_uspi (uspi);
 979         kfree (uspi);
 980         kfree(sbi);
 981         sb->s_fs_info = NULL;
 982         UFSD("EXIT (FAILED)\n");
 983         return -EINVAL;
 984
 985 failed_nomem:
 986         UFSD("EXIT (NOMEM)\n");
 987         return -ENOMEM;
 988 }
 989
 990 static void ufs_write_super (struct super_block *sb) {
 991         struct ufs_sb_private_info * uspi;
 992         struct ufs_super_block_first * usb1;
 993         struct ufs_super_block_third * usb3;
 994         unsigned flags;
 995
 996         lock_kernel();
 997
 998         UFSD("ENTER\n");
 999         flags = UFS_SB(sb)->s_flags;
1000         uspi = UFS_SB(sb)->s_uspi;
1001         usb1 = ubh_get_usb_first(uspi);
1002         usb3 = ubh_get_usb_third(uspi);
1003
1004         if (!(sb->s_flags & MS_RDONLY)) {
1005                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1006                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1007                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1008                         ufs_set_fs_state(sb, usb1, usb3,
1009                                         UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1010                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1011         }
1012         sb->s_dirt = 0;
1013         UFSD("EXIT\n");
1014         unlock_kernel();
1015 }
1016
1017 static void ufs_put_super(struct super_block *sb)
1018 {
1019         struct ufs_sb_info * sbi = UFS_SB(sb);
1020
1021         UFSD("ENTER\n");
1022
1023         if (!(sb->s_flags & MS_RDONLY))
1024                 ufs_put_cylinder_structures (sb);
1025
1026         ubh_brelse_uspi (sbi->s_uspi);
1027         kfree (sbi->s_uspi);
1028         kfree (sbi);
1029         sb->s_fs_info = NULL;
1030 UFSD("EXIT\n");
1031         return;
1032 }
1033
1034
1035 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1036 {
1037         struct ufs_sb_private_info * uspi;
1038         struct ufs_super_block_first * usb1;
1039         struct ufs_super_block_third * usb3;
1040         unsigned new_mount_opt, ufstype;
1041         unsigned flags;
1042
1043         uspi = UFS_SB(sb)->s_uspi;
1044         flags = UFS_SB(sb)->s_flags;
1045         usb1 = ubh_get_usb_first(uspi);
1046         usb3 = ubh_get_usb_third(uspi);
1047
1048         /*
1049          * Allow the "check" option to be passed as a remount option.
1050          * It is not possible to change ufstype option during remount
1051          */
1052         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1053         new_mount_opt = 0;
1054         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1055         if (!ufs_parse_options (data, &new_mount_opt))
1056                 return -EINVAL;
1057         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1058                 new_mount_opt |= ufstype;
1059         }
1060         else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1061                 printk("ufstype can't be changed during remount\n");
1062                 return -EINVAL;
1063         }
1064
1065         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1066                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1067                 return 0;
1068         }
1069
1070         /*
1071          * fs was mouted as rw, remounting ro
1072          */
1073         if (*mount_flags & MS_RDONLY) {
1074                 ufs_put_cylinder_structures(sb);
1075                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1076                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1077                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1078                         ufs_set_fs_state(sb, usb1, usb3,
1079                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1080                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1081                 sb->s_dirt = 0;
1082                 sb->s_flags |= MS_RDONLY;
1083         }
1084         /*
1085          * fs was mounted as ro, remounting rw
1086          */
1087         else {
1088 #ifndef CONFIG_UFS_FS_WRITE
1089                 printk("ufs was compiled with read-only support, "
1090                 "can't be mounted as read-write\n");
1091                 return -EINVAL;
1092 #else
1093                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1094                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1095                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
1096                         printk("this ufstype is read-only supported\n");
1097                         return -EINVAL;
1098                 }
1099                 if (!ufs_read_cylinder_structures (sb)) {
1100                         printk("failed during remounting\n");
1101                         return -EPERM;
1102                 }
1103                 sb->s_flags &= ~MS_RDONLY;
1104 #endif
1105         }
1106         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1107         return 0;
1108 }
1109
1110 static int ufs_statfs (struct dentry *dentry, struct kstatfs *buf)
1111 {
1112         struct super_block *sb = dentry->d_sb;
1113         struct ufs_sb_private_info * uspi;
1114         struct ufs_super_block_first * usb1;
1115         struct ufs_super_block * usb;
1116         unsigned  flags = 0;
1117
1118         lock_kernel();
1119
1120         uspi = UFS_SB(sb)->s_uspi;
1121         usb1 = ubh_get_usb_first (uspi);
1122         usb  = (struct ufs_super_block *)
1123                 ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ;
1124
1125         flags = UFS_SB(sb)->s_flags;
1126         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1127                 buf->f_type = UFS2_MAGIC;
1128                 buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize);
1129                 buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) +
1130                         fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree);
1131                 buf->f_ffree = fs64_to_cpu(sb,
1132                         usb->fs_u11.fs_u2.fs_cstotal.cs_nifree);
1133         }
1134         else {
1135                 buf->f_type = UFS_MAGIC;
1136                 buf->f_blocks = uspi->s_dsize;
1137                 buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) +
1138                         fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
1139                 buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
1140         }
1141         buf->f_bsize = sb->s_blocksize;
1142         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1143                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1144         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1145         buf->f_namelen = UFS_MAXNAMLEN;
1146
1147         unlock_kernel();
1148
1149         return 0;
1150 }
1151
1152 static kmem_cache_t * ufs_inode_cachep;
1153
1154 static struct inode *ufs_alloc_inode(struct super_block *sb)
1155 {
1156         struct ufs_inode_info *ei;
1157         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL);
1158         if (!ei)
1159                 return NULL;
1160         ei->vfs_inode.i_version = 1;
1161         return &ei->vfs_inode;
1162 }
1163
1164 static void ufs_destroy_inode(struct inode *inode)
1165 {
1166         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1167 }
1168
1169 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
1170 {
1171         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1172
1173         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
1174             SLAB_CTOR_CONSTRUCTOR)
1175                 inode_init_once(&ei->vfs_inode);
1176 }
1177
1178 static int init_inodecache(void)
1179 {
1180         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1181                                              sizeof(struct ufs_inode_info),
1182                                              0, (SLAB_RECLAIM_ACCOUNT|
1183                                                 SLAB_MEM_SPREAD),
1184                                              init_once, NULL);
1185         if (ufs_inode_cachep == NULL)
1186                 return -ENOMEM;
1187         return 0;
1188 }
1189
1190 static void destroy_inodecache(void)
1191 {
1192         if (kmem_cache_destroy(ufs_inode_cachep))
1193                 printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n");
1194 }
1195
1196 #ifdef CONFIG_QUOTA
1197 static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
1198 static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
1199 #endif
1200
1201 static struct super_operations ufs_super_ops = {
1202         .alloc_inode    = ufs_alloc_inode,
1203         .destroy_inode  = ufs_destroy_inode,
1204         .read_inode     = ufs_read_inode,
1205         .write_inode    = ufs_write_inode,
1206         .delete_inode   = ufs_delete_inode,
1207         .put_super      = ufs_put_super,
1208         .write_super    = ufs_write_super,
1209         .statfs         = ufs_statfs,
1210         .remount_fs     = ufs_remount,
1211 #ifdef CONFIG_QUOTA
1212         .quota_read     = ufs_quota_read,
1213         .quota_write    = ufs_quota_write,
1214 #endif
1215 };
1216
1217 #ifdef CONFIG_QUOTA
1218
1219 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1220  * acquiring the locks... As quota files are never truncated and quota code
1221  * itself serializes the operations (and noone else should touch the files)
1222  * we don't have to be afraid of races */
1223 static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
1224                                size_t len, loff_t off)
1225 {
1226         struct inode *inode = sb_dqopt(sb)->files[type];
1227         sector_t blk = off >> sb->s_blocksize_bits;
1228         int err = 0;
1229         int offset = off & (sb->s_blocksize - 1);
1230         int tocopy;
1231         size_t toread;
1232         struct buffer_head *bh;
1233         loff_t i_size = i_size_read(inode);
1234
1235         if (off > i_size)
1236                 return 0;
1237         if (off+len > i_size)
1238                 len = i_size-off;
1239         toread = len;
1240         while (toread > 0) {
1241                 tocopy = sb->s_blocksize - offset < toread ?
1242                                 sb->s_blocksize - offset : toread;
1243
1244                 bh = ufs_bread(inode, blk, 0, &err);
1245                 if (err)
1246                         return err;
1247                 if (!bh)        /* A hole? */
1248                         memset(data, 0, tocopy);
1249                 else {
1250                         memcpy(data, bh->b_data+offset, tocopy);
1251                         brelse(bh);
1252                 }
1253                 offset = 0;
1254                 toread -= tocopy;
1255                 data += tocopy;
1256                 blk++;
1257         }
1258         return len;
1259 }
1260
1261 /* Write to quotafile */
1262 static ssize_t ufs_quota_write(struct super_block *sb, int type,
1263                                 const char *data, size_t len, loff_t off)
1264 {
1265         struct inode *inode = sb_dqopt(sb)->files[type];
1266         sector_t blk = off >> sb->s_blocksize_bits;
1267         int err = 0;
1268         int offset = off & (sb->s_blocksize - 1);
1269         int tocopy;
1270         size_t towrite = len;
1271         struct buffer_head *bh;
1272
1273         mutex_lock(&inode->i_mutex);
1274         while (towrite > 0) {
1275                 tocopy = sb->s_blocksize - offset < towrite ?
1276                                 sb->s_blocksize - offset : towrite;
1277
1278                 bh = ufs_bread(inode, blk, 1, &err);
1279                 if (!bh)
1280                         goto out;
1281                 lock_buffer(bh);
1282                 memcpy(bh->b_data+offset, data, tocopy);
1283                 flush_dcache_page(bh->b_page);
1284                 set_buffer_uptodate(bh);
1285                 mark_buffer_dirty(bh);
1286                 unlock_buffer(bh);
1287                 brelse(bh);
1288                 offset = 0;
1289                 towrite -= tocopy;
1290                 data += tocopy;
1291                 blk++;
1292         }
1293 out:
1294         if (len == towrite) {
1295                 mutex_unlock(&inode->i_mutex);
1296                 return err;
1297         }
1298         if (inode->i_size < off+len-towrite)
1299                 i_size_write(inode, off+len-towrite);
1300         inode->i_version++;
1301         inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
1302         mark_inode_dirty(inode);
1303         mutex_unlock(&inode->i_mutex);
1304         return len - towrite;
1305 }
1306
1307 #endif
1308
1309 static int ufs_get_sb(struct file_system_type *fs_type,
1310         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1311 {
1312         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1313 }
1314
1315 static struct file_system_type ufs_fs_type = {
1316         .owner          = THIS_MODULE,
1317         .name           = "ufs",
1318         .get_sb         = ufs_get_sb,
1319         .kill_sb        = kill_block_super,
1320         .fs_flags       = FS_REQUIRES_DEV,
1321 };
1322
1323 static int __init init_ufs_fs(void)
1324 {
1325         int err = init_inodecache();
1326         if (err)
1327                 goto out1;
1328         err = register_filesystem(&ufs_fs_type);
1329         if (err)
1330                 goto out;
1331         return 0;
1332 out:
1333         destroy_inodecache();
1334 out1:
1335         return err;
1336 }
1337
1338 static void __exit exit_ufs_fs(void)
1339 {
1340         unregister_filesystem(&ufs_fs_type);
1341         destroy_inodecache();
1342 }
1343
1344 module_init(init_ufs_fs)
1345 module_exit(exit_ufs_fs)
1346 MODULE_LICENSE("GPL");