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