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 <gwingerde@gmail.com>
  45  *
  46  * Clean swab support on 19970406 by
  47  * Francois-Rene Rideau <fare@tunes.org>
  48  *
  49  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  50  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  51  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  52  *
  53  * NeXTstep support added on February 5th 1998 by
  54  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  55  *
  56  * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
  57  *
  58  * HP/UX hfs filesystem support added by
  59  * Martin K. Petersen <mkp@mkp.net>, August 1999
  60  *
  61  * UFS2 (of FreeBSD 5.x) support added by
  62  * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
  63  *
  64  * UFS2 write support added by
  65  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  66  */
  67
  68
  69 #include <linux/exportfs.h>
  70 #include <linux/module.h>
  71 #include <linux/bitops.h>
  72
  73 #include <stdarg.h>
  74
  75 #include <asm/uaccess.h>
  76 #include <asm/system.h>
  77
  78 #include <linux/errno.h>
  79 #include <linux/fs.h>
  80 #include <linux/slab.h>
  81 #include <linux/time.h>
  82 #include <linux/stat.h>
  83 #include <linux/string.h>
  84 #include <linux/blkdev.h>
  85 #include <linux/init.h>
  86 #include <linux/parser.h>
  87 #include <linux/smp_lock.h>
  88 #include <linux/buffer_head.h>
  89 #include <linux/vfs.h>
  90 #include <linux/log2.h>
  91 #include <linux/mount.h>
  92 #include <linux/seq_file.h>
  93
  94 #include "ufs_fs.h"
  95 #include "ufs.h"
  96 #include "swab.h"
  97 #include "util.h"
  98
  99 static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
 100 {
 101         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 102         struct inode *inode;
 103
 104         if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
 105                 return ERR_PTR(-ESTALE);
 106
 107         inode = ufs_iget(sb, ino);
 108         if (IS_ERR(inode))
 109                 return ERR_CAST(inode);
 110         if (generation && inode->i_generation != generation) {
 111                 iput(inode);
 112                 return ERR_PTR(-ESTALE);
 113         }
 114         return inode;
 115 }
 116
 117 static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
 118                                        int fh_len, int fh_type)
 119 {
 120         return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 121 }
 122
 123 static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
 124                                        int fh_len, int fh_type)
 125 {
 126         return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
 127 }
 128
 129 static struct dentry *ufs_get_parent(struct dentry *child)
 130 {
 131         struct qstr dot_dot = {
 132                 .name   = "..",
 133                 .len    = 2,
 134         };
 135         ino_t ino;
 136
 137         ino = ufs_inode_by_name(child->d_inode, &dot_dot);
 138         if (!ino)
 139                 return ERR_PTR(-ENOENT);
 140         return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
 141 }
 142
 143 static const struct export_operations ufs_export_ops = {
 144         .fh_to_dentry   = ufs_fh_to_dentry,
 145         .fh_to_parent   = ufs_fh_to_parent,
 146         .get_parent     = ufs_get_parent,
 147 };
 148
 149 #ifdef CONFIG_UFS_DEBUG
 150 /*
 151  * Print contents of ufs_super_block, useful for debugging
 152  */
 153 static void ufs_print_super_stuff(struct super_block *sb,
 154                                   struct ufs_super_block_first *usb1,
 155                                   struct ufs_super_block_second *usb2,
 156                                   struct ufs_super_block_third *usb3)
 157 {
 158         u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 159
 160         printk("ufs_print_super_stuff\n");
 161         printk("  magic:     0x%x\n", magic);
 162         if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
 163                 printk("  fs_size:   %llu\n", (unsigned long long)
 164                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
 165                 printk("  fs_dsize:  %llu\n", (unsigned long long)
 166                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
 167                 printk("  bsize:         %u\n",
 168                        fs32_to_cpu(sb, usb1->fs_bsize));
 169                 printk("  fsize:         %u\n",
 170                        fs32_to_cpu(sb, usb1->fs_fsize));
 171                 printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
 172                 printk("  fs_sblockloc: %llu\n", (unsigned long long)
 173                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
 174                 printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
 175                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
 176                 printk("  cs_nbfree(No of free blocks):  %llu\n",
 177                        (unsigned long long)
 178                        fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
 179                 printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
 180                        (unsigned long long)
 181                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
 182                 printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
 183                        (unsigned long long)
 184                        fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
 185                 printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
 186                        fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 187         } else {
 188                 printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
 189                 printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
 190                 printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
 191                 printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
 192                 printk(" cgoffset:    %u\n",
 193                        fs32_to_cpu(sb, usb1->fs_cgoffset));
 194                 printk(" ~cgmask:     0x%x\n",
 195                        ~fs32_to_cpu(sb, usb1->fs_cgmask));
 196                 printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
 197                 printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
 198                 printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
 199                 printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
 200                 printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
 201                 printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
 202                 printk(" fragshift:   %u\n",
 203                        fs32_to_cpu(sb, usb1->fs_fragshift));
 204                 printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
 205                 printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
 206                 printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
 207                 printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
 208                 printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
 209                 printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
 210                 printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
 211                 printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
 212                 printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
 213                 printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
 214                 printk(" fstodb:      %u\n",
 215                        fs32_to_cpu(sb, usb1->fs_fsbtodb));
 216                 printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
 217                 printk(" ndir         %u\n",
 218                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
 219                 printk(" nifree       %u\n",
 220                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
 221                 printk(" nbfree       %u\n",
 222                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
 223                 printk(" nffree       %u\n",
 224                        fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 225         }
 226         printk("\n");
 227 }
 228
 229 /*
 230  * Print contents of ufs_cylinder_group, useful for debugging
 231  */
 232 static void ufs_print_cylinder_stuff(struct super_block *sb,
 233                                      struct ufs_cylinder_group *cg)
 234 {
 235         printk("\nufs_print_cylinder_stuff\n");
 236         printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
 237         printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
 238         printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
 239         printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
 240         printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
 241         printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
 242         printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
 243         printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
 244         printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
 245         printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
 246         printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
 247         printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
 248         printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
 249         printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
 250         printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 251             fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 252             fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 253             fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 254             fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
 255         printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
 256         printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
 257         printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
 258         printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
 259         printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
 260         printk("  clustersumoff %u\n",
 261                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
 262         printk("  clusteroff    %u\n",
 263                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
 264         printk("  nclusterblks  %u\n",
 265                fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
 266         printk("\n");
 267 }
 268 #else
 269 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
 270 #  define ufs_print_cylinder_stuff(sb, cg) /**/
 271 #endif /* CONFIG_UFS_DEBUG */
 272
 273 static const struct super_operations ufs_super_ops;
 274
 275 static char error_buf[1024];
 276
 277 void ufs_error (struct super_block * sb, const char * function,
 278         const char * fmt, ...)
 279 {
 280         struct ufs_sb_private_info * uspi;
 281         struct ufs_super_block_first * usb1;
 282         va_list args;
 283
 284         uspi = UFS_SB(sb)->s_uspi;
 285         usb1 = ubh_get_usb_first(uspi);
 286
 287         if (!(sb->s_flags & MS_RDONLY)) {
 288                 usb1->fs_clean = UFS_FSBAD;
 289                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 290                 sb->s_dirt = 1;
 291                 sb->s_flags |= MS_RDONLY;
 292         }
 293         va_start (args, fmt);
 294         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 295         va_end (args);
 296         switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 297         case UFS_MOUNT_ONERROR_PANIC:
 298                 panic ("UFS-fs panic (device %s): %s: %s\n",
 299                         sb->s_id, function, error_buf);
 300
 301         case UFS_MOUNT_ONERROR_LOCK:
 302         case UFS_MOUNT_ONERROR_UMOUNT:
 303         case UFS_MOUNT_ONERROR_REPAIR:
 304                 printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
 305                         sb->s_id, function, error_buf);
 306         }
 307 }
 308
 309 void ufs_panic (struct super_block * sb, const char * function,
 310         const char * fmt, ...)
 311 {
 312         struct ufs_sb_private_info * uspi;
 313         struct ufs_super_block_first * usb1;
 314         va_list args;
 315
 316         lock_kernel();
 317         uspi = UFS_SB(sb)->s_uspi;
 318         usb1 = ubh_get_usb_first(uspi);
 319
 320         if (!(sb->s_flags & MS_RDONLY)) {
 321                 usb1->fs_clean = UFS_FSBAD;
 322                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
 323                 sb->s_dirt = 1;
 324         }
 325         va_start (args, fmt);
 326         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 327         va_end (args);
 328         sb->s_flags |= MS_RDONLY;
 329         printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
 330                 sb->s_id, function, error_buf);
 331 }
 332
 333 void ufs_warning (struct super_block * sb, const char * function,
 334         const char * fmt, ...)
 335 {
 336         va_list args;
 337
 338         va_start (args, fmt);
 339         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
 340         va_end (args);
 341         printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
 342                 sb->s_id, function, error_buf);
 343 }
 344
 345 enum {
 346        Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
 347        Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
 348        Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
 349        Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
 350        Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
 351        Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
 352        Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
 353        Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
 354        Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
 355        Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
 356        Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
 357        Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
 358        Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
 359        Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
 360        Opt_err
 361 };
 362
 363 static const match_table_t tokens = {
 364         {Opt_type_old, "ufstype=old"},
 365         {Opt_type_sunx86, "ufstype=sunx86"},
 366         {Opt_type_sun, "ufstype=sun"},
 367         {Opt_type_sunos, "ufstype=sunos"},
 368         {Opt_type_44bsd, "ufstype=44bsd"},
 369         {Opt_type_ufs2, "ufstype=ufs2"},
 370         {Opt_type_ufs2, "ufstype=5xbsd"},
 371         {Opt_type_hp, "ufstype=hp"},
 372         {Opt_type_nextstepcd, "ufstype=nextstep-cd"},
 373         {Opt_type_nextstep, "ufstype=nextstep"},
 374         {Opt_type_openstep, "ufstype=openstep"},
 375 /*end of possible ufs types */
 376         {Opt_onerror_panic, "onerror=panic"},
 377         {Opt_onerror_lock, "onerror=lock"},
 378         {Opt_onerror_umount, "onerror=umount"},
 379         {Opt_onerror_repair, "onerror=repair"},
 380         {Opt_err, NULL}
 381 };
 382
 383 static int ufs_parse_options (char * options, unsigned * mount_options)
 384 {
 385         char * p;
 386
 387         UFSD("ENTER\n");
 388
 389         if (!options)
 390                 return 1;
 391
 392         while ((p = strsep(&options, ",")) != NULL) {
 393                 substring_t args[MAX_OPT_ARGS];
 394                 int token;
 395                 if (!*p)
 396                         continue;
 397
 398                 token = match_token(p, tokens, args);
 399                 switch (token) {
 400                 case Opt_type_old:
 401                         ufs_clear_opt (*mount_options, UFSTYPE);
 402                         ufs_set_opt (*mount_options, UFSTYPE_OLD);
 403                         break;
 404                 case Opt_type_sunx86:
 405                         ufs_clear_opt (*mount_options, UFSTYPE);
 406                         ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
 407                         break;
 408                 case Opt_type_sun:
 409                         ufs_clear_opt (*mount_options, UFSTYPE);
 410                         ufs_set_opt (*mount_options, UFSTYPE_SUN);
 411                         break;
 412                 case Opt_type_sunos:
 413                         ufs_clear_opt(*mount_options, UFSTYPE);
 414                         ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
 415                         break;
 416                 case Opt_type_44bsd:
 417                         ufs_clear_opt (*mount_options, UFSTYPE);
 418                         ufs_set_opt (*mount_options, UFSTYPE_44BSD);
 419                         break;
 420                 case Opt_type_ufs2:
 421                         ufs_clear_opt(*mount_options, UFSTYPE);
 422                         ufs_set_opt(*mount_options, UFSTYPE_UFS2);
 423                         break;
 424                 case Opt_type_hp:
 425                         ufs_clear_opt (*mount_options, UFSTYPE);
 426                         ufs_set_opt (*mount_options, UFSTYPE_HP);
 427                         break;
 428                 case Opt_type_nextstepcd:
 429                         ufs_clear_opt (*mount_options, UFSTYPE);
 430                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
 431                         break;
 432                 case Opt_type_nextstep:
 433                         ufs_clear_opt (*mount_options, UFSTYPE);
 434                         ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
 435                         break;
 436                 case Opt_type_openstep:
 437                         ufs_clear_opt (*mount_options, UFSTYPE);
 438                         ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
 439                         break;
 440                 case Opt_onerror_panic:
 441                         ufs_clear_opt (*mount_options, ONERROR);
 442                         ufs_set_opt (*mount_options, ONERROR_PANIC);
 443                         break;
 444                 case Opt_onerror_lock:
 445                         ufs_clear_opt (*mount_options, ONERROR);
 446                         ufs_set_opt (*mount_options, ONERROR_LOCK);
 447                         break;
 448                 case Opt_onerror_umount:
 449                         ufs_clear_opt (*mount_options, ONERROR);
 450                         ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 451                         break;
 452                 case Opt_onerror_repair:
 453                         printk("UFS-fs: Unable to do repair on error, "
 454                                 "will lock lock instead\n");
 455                         ufs_clear_opt (*mount_options, ONERROR);
 456                         ufs_set_opt (*mount_options, ONERROR_REPAIR);
 457                         break;
 458                 default:
 459                         printk("UFS-fs: Invalid option: \"%s\" "
 460                                         "or missing value\n", p);
 461                         return 0;
 462                 }
 463         }
 464         return 1;
 465 }
 466
 467 /*
 468  * Diffrent types of UFS hold fs_cstotal in different
 469  * places, and use diffrent data structure for it.
 470  * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
 471  */
 472 static void ufs_setup_cstotal(struct super_block *sb)
 473 {
 474         struct ufs_sb_info *sbi = UFS_SB(sb);
 475         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 476         struct ufs_super_block_first *usb1;
 477         struct ufs_super_block_second *usb2;
 478         struct ufs_super_block_third *usb3;
 479         unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
 480
 481         UFSD("ENTER, mtype=%u\n", mtype);
 482         usb1 = ubh_get_usb_first(uspi);
 483         usb2 = ubh_get_usb_second(uspi);
 484         usb3 = ubh_get_usb_third(uspi);
 485
 486         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 487              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 488             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 489                 /*we have statistic in different place, then usual*/
 490                 uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
 491                 uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
 492                 uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
 493                 uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
 494         } else {
 495                 uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
 496                 uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
 497                 uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
 498                 uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
 499         }
 500         UFSD("EXIT\n");
 501 }
 502
 503 /*
 504  * Read on-disk structures associated with cylinder groups
 505  */
 506 static int ufs_read_cylinder_structures(struct super_block *sb)
 507 {
 508         struct ufs_sb_info *sbi = UFS_SB(sb);
 509         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 510         struct ufs_buffer_head * ubh;
 511         unsigned char * base, * space;
 512         unsigned size, blks, i;
 513         struct ufs_super_block_third *usb3;
 514
 515         UFSD("ENTER\n");
 516
 517         usb3 = ubh_get_usb_third(uspi);
 518         /*
 519          * Read cs structures from (usually) first data block
 520          * on the device.
 521          */
 522         size = uspi->s_cssize;
 523         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 524         base = space = kmalloc(size, GFP_KERNEL);
 525         if (!base)
 526                 goto failed;
 527         sbi->s_csp = (struct ufs_csum *)space;
 528         for (i = 0; i < blks; i += uspi->s_fpb) {
 529                 size = uspi->s_bsize;
 530                 if (i + uspi->s_fpb > blks)
 531                         size = (blks - i) * uspi->s_fsize;
 532
 533                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 534
 535                 if (!ubh)
 536                         goto failed;
 537
 538                 ubh_ubhcpymem (space, ubh, size);
 539
 540                 space += size;
 541                 ubh_brelse (ubh);
 542                 ubh = NULL;
 543         }
 544
 545         /*
 546          * Read cylinder group (we read only first fragment from block
 547          * at this time) and prepare internal data structures for cg caching.
 548          */
 549         if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
 550                 goto failed;
 551         for (i = 0; i < uspi->s_ncg; i++)
 552                 sbi->s_ucg[i] = NULL;
 553         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 554                 sbi->s_ucpi[i] = NULL;
 555                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 556         }
 557         for (i = 0; i < uspi->s_ncg; i++) {
 558                 UFSD("read cg %u\n", i);
 559                 if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
 560                         goto failed;
 561                 if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
 562                         goto failed;
 563
 564                 ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
 565         }
 566         for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
 567                 if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
 568                         goto failed;
 569                 sbi->s_cgno[i] = UFS_CGNO_EMPTY;
 570         }
 571         sbi->s_cg_loaded = 0;
 572         UFSD("EXIT\n");
 573         return 1;
 574
 575 failed:
 576         kfree (base);
 577         if (sbi->s_ucg) {
 578                 for (i = 0; i < uspi->s_ncg; i++)
 579                         if (sbi->s_ucg[i])
 580                                 brelse (sbi->s_ucg[i]);
 581                 kfree (sbi->s_ucg);
 582                 for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
 583                         kfree (sbi->s_ucpi[i]);
 584         }
 585         UFSD("EXIT (FAILED)\n");
 586         return 0;
 587 }
 588
 589 /*
 590  * Sync our internal copy of fs_cstotal with disk
 591  */
 592 static void ufs_put_cstotal(struct super_block *sb)
 593 {
 594         unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
 595         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 596         struct ufs_super_block_first *usb1;
 597         struct ufs_super_block_second *usb2;
 598         struct ufs_super_block_third *usb3;
 599
 600         UFSD("ENTER\n");
 601         usb1 = ubh_get_usb_first(uspi);
 602         usb2 = ubh_get_usb_second(uspi);
 603         usb3 = ubh_get_usb_third(uspi);
 604
 605         if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
 606              (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
 607             mtype == UFS_MOUNT_UFSTYPE_UFS2) {
 608                 /*we have statistic in different place, then usual*/
 609                 usb2->fs_un.fs_u2.cs_ndir =
 610                         cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
 611                 usb2->fs_un.fs_u2.cs_nbfree =
 612                         cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
 613                 usb3->fs_un1.fs_u2.cs_nifree =
 614                         cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
 615                 usb3->fs_un1.fs_u2.cs_nffree =
 616                         cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
 617         } else {
 618                 usb1->fs_cstotal.cs_ndir =
 619                         cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
 620                 usb1->fs_cstotal.cs_nbfree =
 621                         cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
 622                 usb1->fs_cstotal.cs_nifree =
 623                         cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
 624                 usb1->fs_cstotal.cs_nffree =
 625                         cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
 626         }
 627         ubh_mark_buffer_dirty(USPI_UBH(uspi));
 628         ufs_print_super_stuff(sb, usb1, usb2, usb3);
 629         UFSD("EXIT\n");
 630 }
 631
 632 /**
 633  * ufs_put_super_internal() - put on-disk intrenal structures
 634  * @sb: pointer to super_block structure
 635  * Put on-disk structures associated with cylinder groups
 636  * and write them back to disk, also update cs_total on disk
 637  */
 638 static void ufs_put_super_internal(struct super_block *sb)
 639 {
 640         struct ufs_sb_info *sbi = UFS_SB(sb);
 641         struct ufs_sb_private_info *uspi = sbi->s_uspi;
 642         struct ufs_buffer_head * ubh;
 643         unsigned char * base, * space;
 644         unsigned blks, size, i;
 645
 646
 647         UFSD("ENTER\n");
 648
 649         lock_kernel();
 650
 651         ufs_put_cstotal(sb);
 652         size = uspi->s_cssize;
 653         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 654         base = space = (char*) sbi->s_csp;
 655         for (i = 0; i < blks; i += uspi->s_fpb) {
 656                 size = uspi->s_bsize;
 657                 if (i + uspi->s_fpb > blks)
 658                         size = (blks - i) * uspi->s_fsize;
 659
 660                 ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
 661
 662                 ubh_memcpyubh (ubh, space, size);
 663                 space += size;
 664                 ubh_mark_buffer_uptodate (ubh, 1);
 665                 ubh_mark_buffer_dirty (ubh);
 666                 ubh_brelse (ubh);
 667         }
 668         for (i = 0; i < sbi->s_cg_loaded; i++) {
 669                 ufs_put_cylinder (sb, i);
 670                 kfree (sbi->s_ucpi[i]);
 671         }
 672         for (; i < UFS_MAX_GROUP_LOADED; i++)
 673                 kfree (sbi->s_ucpi[i]);
 674         for (i = 0; i < uspi->s_ncg; i++)
 675                 brelse (sbi->s_ucg[i]);
 676         kfree (sbi->s_ucg);
 677         kfree (base);
 678
 679         unlock_kernel();
 680
 681         UFSD("EXIT\n");
 682 }
 683
 684 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 685 {
 686         struct ufs_sb_info * sbi;
 687         struct ufs_sb_private_info * uspi;
 688         struct ufs_super_block_first * usb1;
 689         struct ufs_super_block_second * usb2;
 690         struct ufs_super_block_third * usb3;
 691         struct ufs_buffer_head * ubh;
 692         struct inode *inode;
 693         unsigned block_size, super_block_size;
 694         unsigned flags;
 695         unsigned super_block_offset;
 696         unsigned maxsymlen;
 697         int ret = -EINVAL;
 698
 699         uspi = NULL;
 700         ubh = NULL;
 701         flags = 0;
 702
 703         UFSD("ENTER\n");
 704
 705         sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
 706         if (!sbi)
 707                 goto failed_nomem;
 708         sb->s_fs_info = sbi;
 709
 710         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
 711
 712 #ifndef CONFIG_UFS_FS_WRITE
 713         if (!(sb->s_flags & MS_RDONLY)) {
 714                 printk("ufs was compiled with read-only support, "
 715                 "can't be mounted as read-write\n");
 716                 goto failed;
 717         }
 718 #endif
 719         /*
 720          * Set default mount options
 721          * Parse mount options
 722          */
 723         sbi->s_mount_opt = 0;
 724         ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 725         if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
 726                 printk("wrong mount options\n");
 727                 goto failed;
 728         }
 729         if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 730                 if (!silent)
 731                         printk("You didn't specify the type of your ufs filesystem\n\n"
 732                         "mount -t ufs -o ufstype="
 733                         "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 734                         ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
 735                         "default is ufstype=old\n");
 736                 ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
 737         }
 738
 739         uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
 740         sbi->s_uspi = uspi;
 741         if (!uspi)
 742                 goto failed;
 743         uspi->s_dirblksize = UFS_SECTOR_SIZE;
 744         super_block_offset=UFS_SBLOCK;
 745
 746         /* Keep 2Gig file limit. Some UFS variants need to override
 747            this but as I don't know which I'll let those in the know loosen
 748            the rules */
 749         switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 750         case UFS_MOUNT_UFSTYPE_44BSD:
 751                 UFSD("ufstype=44bsd\n");
 752                 uspi->s_fsize = block_size = 512;
 753                 uspi->s_fmask = ~(512 - 1);
 754                 uspi->s_fshift = 9;
 755                 uspi->s_sbsize = super_block_size = 1536;
 756                 uspi->s_sbbase = 0;
 757                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 758                 break;
 759         case UFS_MOUNT_UFSTYPE_UFS2:
 760                 UFSD("ufstype=ufs2\n");
 761                 super_block_offset=SBLOCK_UFS2;
 762                 uspi->s_fsize = block_size = 512;
 763                 uspi->s_fmask = ~(512 - 1);
 764                 uspi->s_fshift = 9;
 765                 uspi->s_sbsize = super_block_size = 1536;
 766                 uspi->s_sbbase =  0;
 767                 flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 768                 break;
 769
 770         case UFS_MOUNT_UFSTYPE_SUN:
 771                 UFSD("ufstype=sun\n");
 772                 uspi->s_fsize = block_size = 1024;
 773                 uspi->s_fmask = ~(1024 - 1);
 774                 uspi->s_fshift = 10;
 775                 uspi->s_sbsize = super_block_size = 2048;
 776                 uspi->s_sbbase = 0;
 777                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 778                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
 779                 break;
 780
 781         case UFS_MOUNT_UFSTYPE_SUNOS:
 782                 UFSD(("ufstype=sunos\n"))
 783                 uspi->s_fsize = block_size = 1024;
 784                 uspi->s_fmask = ~(1024 - 1);
 785                 uspi->s_fshift = 10;
 786                 uspi->s_sbsize = 2048;
 787                 super_block_size = 2048;
 788                 uspi->s_sbbase = 0;
 789                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 790                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
 791                 break;
 792
 793         case UFS_MOUNT_UFSTYPE_SUNx86:
 794                 UFSD("ufstype=sunx86\n");
 795                 uspi->s_fsize = block_size = 1024;
 796                 uspi->s_fmask = ~(1024 - 1);
 797                 uspi->s_fshift = 10;
 798                 uspi->s_sbsize = super_block_size = 2048;
 799                 uspi->s_sbbase = 0;
 800                 uspi->s_maxsymlinklen = 0; /* Not supported on disk */
 801                 flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
 802                 break;
 803
 804         case UFS_MOUNT_UFSTYPE_OLD:
 805                 UFSD("ufstype=old\n");
 806                 uspi->s_fsize = block_size = 1024;
 807                 uspi->s_fmask = ~(1024 - 1);
 808                 uspi->s_fshift = 10;
 809                 uspi->s_sbsize = super_block_size = 2048;
 810                 uspi->s_sbbase = 0;
 811                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 812                 if (!(sb->s_flags & MS_RDONLY)) {
 813                         if (!silent)
 814                                 printk(KERN_INFO "ufstype=old is supported read-only\n");
 815                         sb->s_flags |= MS_RDONLY;
 816                 }
 817                 break;
 818
 819         case UFS_MOUNT_UFSTYPE_NEXTSTEP:
 820                 UFSD("ufstype=nextstep\n");
 821                 uspi->s_fsize = block_size = 1024;
 822                 uspi->s_fmask = ~(1024 - 1);
 823                 uspi->s_fshift = 10;
 824                 uspi->s_sbsize = super_block_size = 2048;
 825                 uspi->s_sbbase = 0;
 826                 uspi->s_dirblksize = 1024;
 827                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 828                 if (!(sb->s_flags & MS_RDONLY)) {
 829                         if (!silent)
 830                                 printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
 831                         sb->s_flags |= MS_RDONLY;
 832                 }
 833                 break;
 834
 835         case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
 836                 UFSD("ufstype=nextstep-cd\n");
 837                 uspi->s_fsize = block_size = 2048;
 838                 uspi->s_fmask = ~(2048 - 1);
 839                 uspi->s_fshift = 11;
 840                 uspi->s_sbsize = super_block_size = 2048;
 841                 uspi->s_sbbase = 0;
 842                 uspi->s_dirblksize = 1024;
 843                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 844                 if (!(sb->s_flags & MS_RDONLY)) {
 845                         if (!silent)
 846                                 printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
 847                         sb->s_flags |= MS_RDONLY;
 848                 }
 849                 break;
 850
 851         case UFS_MOUNT_UFSTYPE_OPENSTEP:
 852                 UFSD("ufstype=openstep\n");
 853                 uspi->s_fsize = block_size = 1024;
 854                 uspi->s_fmask = ~(1024 - 1);
 855                 uspi->s_fshift = 10;
 856                 uspi->s_sbsize = super_block_size = 2048;
 857                 uspi->s_sbbase = 0;
 858                 uspi->s_dirblksize = 1024;
 859                 flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 860                 if (!(sb->s_flags & MS_RDONLY)) {
 861                         if (!silent)
 862                                 printk(KERN_INFO "ufstype=openstep is supported read-only\n");
 863                         sb->s_flags |= MS_RDONLY;
 864                 }
 865                 break;
 866
 867         case UFS_MOUNT_UFSTYPE_HP:
 868                 UFSD("ufstype=hp\n");
 869                 uspi->s_fsize = block_size = 1024;
 870                 uspi->s_fmask = ~(1024 - 1);
 871                 uspi->s_fshift = 10;
 872                 uspi->s_sbsize = super_block_size = 2048;
 873                 uspi->s_sbbase = 0;
 874                 flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 875                 if (!(sb->s_flags & MS_RDONLY)) {
 876                         if (!silent)
 877                                 printk(KERN_INFO "ufstype=hp is supported read-only\n");
 878                         sb->s_flags |= MS_RDONLY;
 879                 }
 880                 break;
 881         default:
 882                 if (!silent)
 883                         printk("unknown ufstype\n");
 884                 goto failed;
 885         }
 886
 887 again:
 888         if (!sb_set_blocksize(sb, block_size)) {
 889                 printk(KERN_ERR "UFS: failed to set blocksize\n");
 890                 goto failed;
 891         }
 892
 893         /*
 894          * read ufs super block from device
 895          */
 896
 897         ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
 898
 899         if (!ubh)
 900             goto failed;
 901
 902         usb1 = ubh_get_usb_first(uspi);
 903         usb2 = ubh_get_usb_second(uspi);
 904         usb3 = ubh_get_usb_third(uspi);
 905
 906         /* Sort out mod used on SunOS 4.1.3 for fs_state */
 907         uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
 908         if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
 909             (uspi->s_postblformat != UFS_42POSTBLFMT)) {
 910                 flags &= ~UFS_ST_MASK;
 911                 flags |=  UFS_ST_SUN;
 912         }
 913
 914         /*
 915          * Check ufs magic number
 916          */
 917         sbi->s_bytesex = BYTESEX_LE;
 918         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 919                 case UFS_MAGIC:
 920                 case UFS_MAGIC_BW:
 921                 case UFS2_MAGIC:
 922                 case UFS_MAGIC_LFN:
 923                 case UFS_MAGIC_FEA:
 924                 case UFS_MAGIC_4GB:
 925                         goto magic_found;
 926         }
 927         sbi->s_bytesex = BYTESEX_BE;
 928         switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
 929                 case UFS_MAGIC:
 930                 case UFS_MAGIC_BW:
 931                 case UFS2_MAGIC:
 932                 case UFS_MAGIC_LFN:
 933                 case UFS_MAGIC_FEA:
 934                 case UFS_MAGIC_4GB:
 935                         goto magic_found;
 936         }
 937
 938         if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
 939           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
 940           || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
 941           && uspi->s_sbbase < 256) {
 942                 ubh_brelse_uspi(uspi);
 943                 ubh = NULL;
 944                 uspi->s_sbbase += 8;
 945                 goto again;
 946         }
 947         if (!silent)
 948                 printk("ufs_read_super: bad magic number\n");
 949         goto failed;
 950
 951 magic_found:
 952         /*
 953          * Check block and fragment sizes
 954          */
 955         uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
 956         uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
 957         uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
 958         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 959         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 960
 961         if (!is_power_of_2(uspi->s_fsize)) {
 962                 printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 963                         uspi->s_fsize);
 964                         goto failed;
 965         }
 966         if (uspi->s_fsize < 512) {
 967                 printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
 968                         uspi->s_fsize);
 969                 goto failed;
 970         }
 971         if (uspi->s_fsize > 4096) {
 972                 printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
 973                         uspi->s_fsize);
 974                 goto failed;
 975         }
 976         if (!is_power_of_2(uspi->s_bsize)) {
 977                 printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 978                         uspi->s_bsize);
 979                 goto failed;
 980         }
 981         if (uspi->s_bsize < 4096) {
 982                 printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
 983                         uspi->s_bsize);
 984                 goto failed;
 985         }
 986         if (uspi->s_bsize / uspi->s_fsize > 8) {
 987                 printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
 988                         uspi->s_bsize / uspi->s_fsize);
 989                 goto failed;
 990         }
 991         if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
 992                 ubh_brelse_uspi(uspi);
 993                 ubh = NULL;
 994                 block_size = uspi->s_fsize;
 995                 super_block_size = uspi->s_sbsize;
 996                 UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
 997                 goto again;
 998         }
 999
1000         sbi->s_flags = flags;/*after that line some functions use s_flags*/
1001         ufs_print_super_stuff(sb, usb1, usb2, usb3);
1002
1003         /*
1004          * Check, if file system was correctly unmounted.
1005          * If not, make it read only.
1006          */
1007         if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
1008           ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
1009           (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
1010             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1011           (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
1012           (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
1013                 switch(usb1->fs_clean) {
1014                 case UFS_FSCLEAN:
1015                         UFSD("fs is clean\n");
1016                         break;
1017                 case UFS_FSSTABLE:
1018                         UFSD("fs is stable\n");
1019                         break;
1020                 case UFS_FSLOG:
1021                         UFSD("fs is logging fs\n");
1022                         break;
1023                 case UFS_FSOSF1:
1024                         UFSD("fs is DEC OSF/1\n");
1025                         break;
1026                 case UFS_FSACTIVE:
1027                         printk("ufs_read_super: fs is active\n");
1028                         sb->s_flags |= MS_RDONLY;
1029                         break;
1030                 case UFS_FSBAD:
1031                         printk("ufs_read_super: fs is bad\n");
1032                         sb->s_flags |= MS_RDONLY;
1033                         break;
1034                 default:
1035                         printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
1036                         sb->s_flags |= MS_RDONLY;
1037                         break;
1038                 }
1039         } else {
1040                 printk("ufs_read_super: fs needs fsck\n");
1041                 sb->s_flags |= MS_RDONLY;
1042         }
1043
1044         /*
1045          * Read ufs_super_block into internal data structures
1046          */
1047         sb->s_op = &ufs_super_ops;
1048         sb->s_export_op = &ufs_export_ops;
1049
1050         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
1051
1052         uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
1053         uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
1054         uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
1055         uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
1056         uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
1057         uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);
1058
1059         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1060                 uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
1061                 uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1062         } else {
1063                 uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
1064                 uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
1065         }
1066
1067         uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
1068         /* s_bsize already set */
1069         /* s_fsize already set */
1070         uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
1071         uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
1072         uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
1073         uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
1074         uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
1075         uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
1076         UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
1077                 uspi->s_fshift);
1078         uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
1079         uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
1080         /* s_sbsize already set */
1081         uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
1082         uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
1083         uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
1084         uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
1085         uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
1086         uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
1087         uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
1088         uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
1089
1090         if (uspi->fs_magic == UFS2_MAGIC)
1091                 uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
1092         else
1093                 uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
1094
1095         uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
1096         uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
1097         uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
1098         uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
1099         uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
1100         uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
1101         uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
1102         uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
1103         uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
1104         uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
1105         uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
1106         uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
1107         uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
1108         uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);
1109
1110         /*
1111          * Compute another frequently used values
1112          */
1113         uspi->s_fpbmask = uspi->s_fpb - 1;
1114         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
1115                 uspi->s_apbshift = uspi->s_bshift - 3;
1116         else
1117                 uspi->s_apbshift = uspi->s_bshift - 2;
1118
1119         uspi->s_2apbshift = uspi->s_apbshift * 2;
1120         uspi->s_3apbshift = uspi->s_apbshift * 3;
1121         uspi->s_apb = 1 << uspi->s_apbshift;
1122         uspi->s_2apb = 1 << uspi->s_2apbshift;
1123         uspi->s_3apb = 1 << uspi->s_3apbshift;
1124         uspi->s_apbmask = uspi->s_apb - 1;
1125         uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
1126         uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
1127         uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
1128         uspi->s_bpf = uspi->s_fsize << 3;
1129         uspi->s_bpfshift = uspi->s_fshift + 3;
1130         uspi->s_bpfmask = uspi->s_bpf - 1;
1131         if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD ||
1132             (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
1133                 uspi->s_maxsymlinklen =
1134                     fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
1135
1136         if (uspi->fs_magic == UFS2_MAGIC)
1137                 maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
1138         else
1139                 maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
1140         if (uspi->s_maxsymlinklen > maxsymlen) {
1141                 ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
1142                             "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
1143                 uspi->s_maxsymlinklen = maxsymlen;
1144         }
1145
1146         inode = ufs_iget(sb, UFS_ROOTINO);
1147         if (IS_ERR(inode)) {
1148                 ret = PTR_ERR(inode);
1149                 goto failed;
1150         }
1151         sb->s_root = d_alloc_root(inode);
1152         if (!sb->s_root) {
1153                 ret = -ENOMEM;
1154                 goto dalloc_failed;
1155         }
1156
1157         ufs_setup_cstotal(sb);
1158         /*
1159          * Read cylinder group structures
1160          */
1161         if (!(sb->s_flags & MS_RDONLY))
1162                 if (!ufs_read_cylinder_structures(sb))
1163                         goto failed;
1164
1165         UFSD("EXIT\n");
1166         return 0;
1167
1168 dalloc_failed:
1169         iput(inode);
1170 failed:
1171         if (ubh)
1172                 ubh_brelse_uspi (uspi);
1173         kfree (uspi);
1174         kfree(sbi);
1175         sb->s_fs_info = NULL;
1176         UFSD("EXIT (FAILED)\n");
1177         return ret;
1178
1179 failed_nomem:
1180         UFSD("EXIT (NOMEM)\n");
1181         return -ENOMEM;
1182 }
1183
1184 static int ufs_sync_fs(struct super_block *sb, int wait)
1185 {
1186         struct ufs_sb_private_info * uspi;
1187         struct ufs_super_block_first * usb1;
1188         struct ufs_super_block_third * usb3;
1189         unsigned flags;
1190
1191         lock_super(sb);
1192         lock_kernel();
1193
1194         UFSD("ENTER\n");
1195
1196         flags = UFS_SB(sb)->s_flags;
1197         uspi = UFS_SB(sb)->s_uspi;
1198         usb1 = ubh_get_usb_first(uspi);
1199         usb3 = ubh_get_usb_third(uspi);
1200
1201         usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1202         if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
1203             (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
1204             (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1205                 ufs_set_fs_state(sb, usb1, usb3,
1206                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1207         ufs_put_cstotal(sb);
1208         sb->s_dirt = 0;
1209
1210         UFSD("EXIT\n");
1211         unlock_kernel();
1212         unlock_super(sb);
1213
1214         return 0;
1215 }
1216
1217 static void ufs_write_super(struct super_block *sb)
1218 {
1219         if (!(sb->s_flags & MS_RDONLY))
1220                 ufs_sync_fs(sb, 1);
1221         else
1222                 sb->s_dirt = 0;
1223 }
1224
1225 static void ufs_put_super(struct super_block *sb)
1226 {
1227         struct ufs_sb_info * sbi = UFS_SB(sb);
1228
1229         UFSD("ENTER\n");
1230
1231         if (sb->s_dirt)
1232                 ufs_write_super(sb);
1233
1234         if (!(sb->s_flags & MS_RDONLY))
1235                 ufs_put_super_internal(sb);
1236
1237         ubh_brelse_uspi (sbi->s_uspi);
1238         kfree (sbi->s_uspi);
1239         kfree (sbi);
1240         sb->s_fs_info = NULL;
1241         UFSD("EXIT\n");
1242         return;
1243 }
1244
1245
1246 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
1247 {
1248         struct ufs_sb_private_info * uspi;
1249         struct ufs_super_block_first * usb1;
1250         struct ufs_super_block_third * usb3;
1251         unsigned new_mount_opt, ufstype;
1252         unsigned flags;
1253
1254         lock_kernel();
1255         lock_super(sb);
1256         uspi = UFS_SB(sb)->s_uspi;
1257         flags = UFS_SB(sb)->s_flags;
1258         usb1 = ubh_get_usb_first(uspi);
1259         usb3 = ubh_get_usb_third(uspi);
1260
1261         /*
1262          * Allow the "check" option to be passed as a remount option.
1263          * It is not possible to change ufstype option during remount
1264          */
1265         ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
1266         new_mount_opt = 0;
1267         ufs_set_opt (new_mount_opt, ONERROR_LOCK);
1268         if (!ufs_parse_options (data, &new_mount_opt)) {
1269                 unlock_super(sb);
1270                 unlock_kernel();
1271                 return -EINVAL;
1272         }
1273         if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
1274                 new_mount_opt |= ufstype;
1275         } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
1276                 printk("ufstype can't be changed during remount\n");
1277                 unlock_super(sb);
1278                 unlock_kernel();
1279                 return -EINVAL;
1280         }
1281
1282         if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
1283                 UFS_SB(sb)->s_mount_opt = new_mount_opt;
1284                 unlock_super(sb);
1285                 unlock_kernel();
1286                 return 0;
1287         }
1288
1289         /*
1290          * fs was mouted as rw, remounting ro
1291          */
1292         if (*mount_flags & MS_RDONLY) {
1293                 ufs_put_super_internal(sb);
1294                 usb1->fs_time = cpu_to_fs32(sb, get_seconds());
1295                 if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1296                   || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
1297                   || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
1298                         ufs_set_fs_state(sb, usb1, usb3,
1299                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1300                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
1301                 sb->s_dirt = 0;
1302                 sb->s_flags |= MS_RDONLY;
1303         } else {
1304         /*
1305          * fs was mounted as ro, remounting rw
1306          */
1307 #ifndef CONFIG_UFS_FS_WRITE
1308                 printk("ufs was compiled with read-only support, "
1309                 "can't be mounted as read-write\n");
1310                 unlock_super(sb);
1311                 unlock_kernel();
1312                 return -EINVAL;
1313 #else
1314                 if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
1315                     ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
1316                     ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1317                     ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
1318                     ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
1319                         printk("this ufstype is read-only supported\n");
1320                         unlock_super(sb);
1321                         unlock_kernel();
1322                         return -EINVAL;
1323                 }
1324                 if (!ufs_read_cylinder_structures(sb)) {
1325                         printk("failed during remounting\n");
1326                         unlock_super(sb);
1327                         unlock_kernel();
1328                         return -EPERM;
1329                 }
1330                 sb->s_flags &= ~MS_RDONLY;
1331 #endif
1332         }
1333         UFS_SB(sb)->s_mount_opt = new_mount_opt;
1334         unlock_super(sb);
1335         unlock_kernel();
1336         return 0;
1337 }
1338
1339 static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
1340 {
1341         struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
1342         unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
1343         const struct match_token *tp = tokens;
1344
1345         while (tp->token != Opt_onerror_panic && tp->token != mval)
1346                 ++tp;
1347         BUG_ON(tp->token == Opt_onerror_panic);
1348         seq_printf(seq, ",%s", tp->pattern);
1349
1350         mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
1351         while (tp->token != Opt_err && tp->token != mval)
1352                 ++tp;
1353         BUG_ON(tp->token == Opt_err);
1354         seq_printf(seq, ",%s", tp->pattern);
1355
1356         return 0;
1357 }
1358
1359 static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
1360 {
1361         struct super_block *sb = dentry->d_sb;
1362         struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
1363         unsigned  flags = UFS_SB(sb)->s_flags;
1364         struct ufs_super_block_first *usb1;
1365         struct ufs_super_block_second *usb2;
1366         struct ufs_super_block_third *usb3;
1367         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1368
1369         lock_kernel();
1370
1371         usb1 = ubh_get_usb_first(uspi);
1372         usb2 = ubh_get_usb_second(uspi);
1373         usb3 = ubh_get_usb_third(uspi);
1374
1375         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
1376                 buf->f_type = UFS2_MAGIC;
1377                 buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
1378         } else {
1379                 buf->f_type = UFS_MAGIC;
1380                 buf->f_blocks = uspi->s_dsize;
1381         }
1382         buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
1383                 uspi->cs_total.cs_nffree;
1384         buf->f_ffree = uspi->cs_total.cs_nifree;
1385         buf->f_bsize = sb->s_blocksize;
1386         buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
1387                 ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
1388         buf->f_files = uspi->s_ncg * uspi->s_ipg;
1389         buf->f_namelen = UFS_MAXNAMLEN;
1390         buf->f_fsid.val[0] = (u32)id;
1391         buf->f_fsid.val[1] = (u32)(id >> 32);
1392
1393         unlock_kernel();
1394
1395         return 0;
1396 }
1397
1398 static struct kmem_cache * ufs_inode_cachep;
1399
1400 static struct inode *ufs_alloc_inode(struct super_block *sb)
1401 {
1402         struct ufs_inode_info *ei;
1403         ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
1404         if (!ei)
1405                 return NULL;
1406         ei->vfs_inode.i_version = 1;
1407         return &ei->vfs_inode;
1408 }
1409
1410 static void ufs_destroy_inode(struct inode *inode)
1411 {
1412         kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
1413 }
1414
1415 static void init_once(void *foo)
1416 {
1417         struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
1418
1419         inode_init_once(&ei->vfs_inode);
1420 }
1421
1422 static int init_inodecache(void)
1423 {
1424         ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
1425                                              sizeof(struct ufs_inode_info),
1426                                              0, (SLAB_RECLAIM_ACCOUNT|
1427                                                 SLAB_MEM_SPREAD),
1428                                              init_once);
1429         if (ufs_inode_cachep == NULL)
1430                 return -ENOMEM;
1431         return 0;
1432 }
1433
1434 static void destroy_inodecache(void)
1435 {
1436         kmem_cache_destroy(ufs_inode_cachep);
1437 }
1438
1439 static const struct super_operations ufs_super_ops = {
1440         .alloc_inode    = ufs_alloc_inode,
1441         .destroy_inode  = ufs_destroy_inode,
1442         .write_inode    = ufs_write_inode,
1443         .delete_inode   = ufs_delete_inode,
1444         .put_super      = ufs_put_super,
1445         .write_super    = ufs_write_super,
1446         .sync_fs        = ufs_sync_fs,
1447         .statfs         = ufs_statfs,
1448         .remount_fs     = ufs_remount,
1449         .show_options   = ufs_show_options,
1450 };
1451
1452 static int ufs_get_sb(struct file_system_type *fs_type,
1453         int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1454 {
1455         return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
1456 }
1457
1458 static struct file_system_type ufs_fs_type = {
1459         .owner          = THIS_MODULE,
1460         .name           = "ufs",
1461         .get_sb         = ufs_get_sb,
1462         .kill_sb        = kill_block_super,
1463         .fs_flags       = FS_REQUIRES_DEV,
1464 };
1465
1466 static int __init init_ufs_fs(void)
1467 {
1468         int err = init_inodecache();
1469         if (err)
1470                 goto out1;
1471         err = register_filesystem(&ufs_fs_type);
1472         if (err)
1473                 goto out;
1474         return 0;
1475 out:
1476         destroy_inodecache();
1477 out1:
1478         return err;
1479 }
1480
1481 static void __exit exit_ufs_fs(void)
1482 {
1483         unregister_filesystem(&ufs_fs_type);
1484         destroy_inodecache();
1485 }
1486
1487 module_init(init_ufs_fs)
1488 module_exit(exit_ufs_fs)
1489 MODULE_LICENSE("GPL");