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   1 /*
   2  *  linux/fs/ufs/inode.c
   3  *
   4  * Copyright (C) 1998
   5  * Daniel Pirkl <daniel.pirkl@email.cz>
   6  * Charles University, Faculty of Mathematics and Physics
   7  *
   8  *  from
   9  *
  10  *  linux/fs/ext2/inode.c
  11  *
  12  * Copyright (C) 1992, 1993, 1994, 1995
  13  * Remy Card (card@masi.ibp.fr)
  14  * Laboratoire MASI - Institut Blaise Pascal
  15  * Universite Pierre et Marie Curie (Paris VI)
  16  *
  17  *  from
  18  *
  19  *  linux/fs/minix/inode.c
  20  *
  21  *  Copyright (C) 1991, 1992  Linus Torvalds
  22  *
  23  *  Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  24  *  Big-endian to little-endian byte-swapping/bitmaps by
  25  *        David S. Miller (davem@caip.rutgers.edu), 1995
  26  */
  27
  28 #include <asm/uaccess.h>
  29 #include <asm/system.h>
  30
  31 #include <linux/errno.h>
  32 #include <linux/fs.h>
  33 #include <linux/time.h>
  34 #include <linux/stat.h>
  35 #include <linux/string.h>
  36 #include <linux/mm.h>
  37 #include <linux/smp_lock.h>
  38 #include <linux/buffer_head.h>
  39
  40 #include "ufs_fs.h"
  41 #include "ufs.h"
  42 #include "swab.h"
  43 #include "util.h"
  44
  45 static u64 ufs_frag_map(struct inode *inode, sector_t frag);
  46
  47 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
  48 {
  49         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
  50         int ptrs = uspi->s_apb;
  51         int ptrs_bits = uspi->s_apbshift;
  52         const long direct_blocks = UFS_NDADDR,
  53                 indirect_blocks = ptrs,
  54                 double_blocks = (1 << (ptrs_bits * 2));
  55         int n = 0;
  56
  57
  58         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
  59         if (i_block < direct_blocks) {
  60                 offsets[n++] = i_block;
  61         } else if ((i_block -= direct_blocks) < indirect_blocks) {
  62                 offsets[n++] = UFS_IND_BLOCK;
  63                 offsets[n++] = i_block;
  64         } else if ((i_block -= indirect_blocks) < double_blocks) {
  65                 offsets[n++] = UFS_DIND_BLOCK;
  66                 offsets[n++] = i_block >> ptrs_bits;
  67                 offsets[n++] = i_block & (ptrs - 1);
  68         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  69                 offsets[n++] = UFS_TIND_BLOCK;
  70                 offsets[n++] = i_block >> (ptrs_bits * 2);
  71                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  72                 offsets[n++] = i_block & (ptrs - 1);
  73         } else {
  74                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  75         }
  76         return n;
  77 }
  78
  79 /*
  80  * Returns the location of the fragment from
  81  * the begining of the filesystem.
  82  */
  83
  84 static u64 ufs_frag_map(struct inode *inode, sector_t frag)
  85 {
  86         struct ufs_inode_info *ufsi = UFS_I(inode);
  87         struct super_block *sb = inode->i_sb;
  88         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
  89         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
  90         int shift = uspi->s_apbshift-uspi->s_fpbshift;
  91         sector_t offsets[4], *p;
  92         int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
  93         u64  ret = 0L;
  94         __fs32 block;
  95         __fs64 u2_block = 0L;
  96         unsigned flags = UFS_SB(sb)->s_flags;
  97         u64 temp = 0L;
  98
  99         UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
 100         UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
 101                 uspi->s_fpbshift, uspi->s_apbmask,
 102                 (unsigned long long)mask);
 103
 104         if (depth == 0)
 105                 return 0;
 106
 107         p = offsets;
 108
 109         lock_kernel();
 110         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 111                 goto ufs2;
 112
 113         block = ufsi->i_u1.i_data[*p++];
 114         if (!block)
 115                 goto out;
 116         while (--depth) {
 117                 struct buffer_head *bh;
 118                 sector_t n = *p++;
 119
 120                 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
 121                 if (!bh)
 122                         goto out;
 123                 block = ((__fs32 *) bh->b_data)[n & mask];
 124                 brelse (bh);
 125                 if (!block)
 126                         goto out;
 127         }
 128         ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
 129         goto out;
 130 ufs2:
 131         u2_block = ufsi->i_u1.u2_i_data[*p++];
 132         if (!u2_block)
 133                 goto out;
 134
 135
 136         while (--depth) {
 137                 struct buffer_head *bh;
 138                 sector_t n = *p++;
 139
 140
 141                 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
 142                 bh = sb_bread(sb, temp +(u64) (n>>shift));
 143                 if (!bh)
 144                         goto out;
 145                 u2_block = ((__fs64 *)bh->b_data)[n & mask];
 146                 brelse(bh);
 147                 if (!u2_block)
 148                         goto out;
 149         }
 150         temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
 151         ret = temp + (u64) (frag & uspi->s_fpbmask);
 152
 153 out:
 154         unlock_kernel();
 155         return ret;
 156 }
 157
 158 /**
 159  * ufs_inode_getfrag() - allocate new fragment(s)
 160  * @inode - pointer to inode
 161  * @fragment - number of `fragment' which hold pointer
 162  *   to new allocated fragment(s)
 163  * @new_fragment - number of new allocated fragment(s)
 164  * @required - how many fragment(s) we require
 165  * @err - we set it if something wrong
 166  * @phys - pointer to where we save physical number of new allocated fragments,
 167  *   NULL if we allocate not data(indirect blocks for example).
 168  * @new - we set it if we allocate new block
 169  * @locked_page - for ufs_new_fragments()
 170  */
 171 static struct buffer_head *
 172 ufs_inode_getfrag(struct inode *inode, u64 fragment,
 173                   sector_t new_fragment, unsigned int required, int *err,
 174                   long *phys, int *new, struct page *locked_page)
 175 {
 176         struct ufs_inode_info *ufsi = UFS_I(inode);
 177         struct super_block *sb = inode->i_sb;
 178         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 179         struct buffer_head * result;
 180         unsigned blockoff, lastblockoff;
 181         u64 tmp, goal, lastfrag, block, lastblock;
 182         void *p, *p2;
 183
 184         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
 185              "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
 186              (unsigned long long)new_fragment, required, !phys);
 187
 188         /* TODO : to be done for write support
 189         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 190              goto ufs2;
 191          */
 192
 193         block = ufs_fragstoblks (fragment);
 194         blockoff = ufs_fragnum (fragment);
 195         p = ufs_get_direct_data_ptr(uspi, ufsi, block);
 196
 197         goal = 0;
 198
 199 repeat:
 200         tmp = ufs_data_ptr_to_cpu(sb, p);
 201
 202         lastfrag = ufsi->i_lastfrag;
 203         if (tmp && fragment < lastfrag) {
 204                 if (!phys) {
 205                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 206                         if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
 207                                 UFSD("EXIT, result %llu\n",
 208                                      (unsigned long long)tmp + blockoff);
 209                                 return result;
 210                         }
 211                         brelse (result);
 212                         goto repeat;
 213                 } else {
 214                         *phys = uspi->s_sbbase + tmp + blockoff;
 215                         return NULL;
 216                 }
 217         }
 218
 219         lastblock = ufs_fragstoblks (lastfrag);
 220         lastblockoff = ufs_fragnum (lastfrag);
 221         /*
 222          * We will extend file into new block beyond last allocated block
 223          */
 224         if (lastblock < block) {
 225                 /*
 226                  * We must reallocate last allocated block
 227                  */
 228                 if (lastblockoff) {
 229                         p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
 230                         tmp = ufs_new_fragments(inode, p2, lastfrag,
 231                                                 ufs_data_ptr_to_cpu(sb, p2),
 232                                                 uspi->s_fpb - lastblockoff,
 233                                                 err, locked_page);
 234                         if (!tmp) {
 235                                 if (lastfrag != ufsi->i_lastfrag)
 236                                         goto repeat;
 237                                 else
 238                                         return NULL;
 239                         }
 240                         lastfrag = ufsi->i_lastfrag;
 241
 242                 }
 243                 tmp = ufs_data_ptr_to_cpu(sb,
 244                                          ufs_get_direct_data_ptr(uspi, ufsi,
 245                                                                  lastblock));
 246                 if (tmp)
 247                         goal = tmp + uspi->s_fpb;
 248                 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
 249                                          goal, required + blockoff,
 250                                          err,
 251                                          phys != NULL ? locked_page : NULL);
 252         } else if (lastblock == block) {
 253         /*
 254          * We will extend last allocated block
 255          */
 256                 tmp = ufs_new_fragments(inode, p, fragment -
 257                                         (blockoff - lastblockoff),
 258                                         ufs_data_ptr_to_cpu(sb, p),
 259                                         required +  (blockoff - lastblockoff),
 260                                         err, phys != NULL ? locked_page : NULL);
 261         } else /* (lastblock > block) */ {
 262         /*
 263          * We will allocate new block before last allocated block
 264          */
 265                 if (block) {
 266                         tmp = ufs_data_ptr_to_cpu(sb,
 267                                                  ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
 268                         if (tmp)
 269                                 goal = tmp + uspi->s_fpb;
 270                 }
 271                 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
 272                                         goal, uspi->s_fpb, err,
 273                                         phys != NULL ? locked_page : NULL);
 274         }
 275         if (!tmp) {
 276                 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
 277                     (blockoff && lastfrag != ufsi->i_lastfrag))
 278                         goto repeat;
 279                 *err = -ENOSPC;
 280                 return NULL;
 281         }
 282
 283         if (!phys) {
 284                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 285         } else {
 286                 *phys = uspi->s_sbbase + tmp + blockoff;
 287                 result = NULL;
 288                 *err = 0;
 289                 *new = 1;
 290         }
 291
 292         inode->i_ctime = CURRENT_TIME_SEC;
 293         if (IS_SYNC(inode))
 294                 ufs_sync_inode (inode);
 295         mark_inode_dirty(inode);
 296         UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
 297         return result;
 298
 299      /* This part : To be implemented ....
 300         Required only for writing, not required for READ-ONLY.
 301 ufs2:
 302
 303         u2_block = ufs_fragstoblks(fragment);
 304         u2_blockoff = ufs_fragnum(fragment);
 305         p = ufsi->i_u1.u2_i_data + block;
 306         goal = 0;
 307
 308 repeat2:
 309         tmp = fs32_to_cpu(sb, *p);
 310         lastfrag = ufsi->i_lastfrag;
 311
 312      */
 313 }
 314
 315 /**
 316  * ufs_inode_getblock() - allocate new block
 317  * @inode - pointer to inode
 318  * @bh - pointer to block which hold "pointer" to new allocated block
 319  * @fragment - number of `fragment' which hold pointer
 320  *   to new allocated block
 321  * @new_fragment - number of new allocated fragment
 322  *  (block will hold this fragment and also uspi->s_fpb-1)
 323  * @err - see ufs_inode_getfrag()
 324  * @phys - see ufs_inode_getfrag()
 325  * @new - see ufs_inode_getfrag()
 326  * @locked_page - see ufs_inode_getfrag()
 327  */
 328 static struct buffer_head *
 329 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
 330                   u64 fragment, sector_t new_fragment, int *err,
 331                   long *phys, int *new, struct page *locked_page)
 332 {
 333         struct super_block *sb = inode->i_sb;
 334         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 335         struct buffer_head * result;
 336         unsigned blockoff;
 337         u64 tmp, goal, block;
 338         void *p;
 339
 340         block = ufs_fragstoblks (fragment);
 341         blockoff = ufs_fragnum (fragment);
 342
 343         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
 344              inode->i_ino, (unsigned long long)fragment,
 345              (unsigned long long)new_fragment, !phys);
 346
 347         result = NULL;
 348         if (!bh)
 349                 goto out;
 350         if (!buffer_uptodate(bh)) {
 351                 ll_rw_block (READ, 1, &bh);
 352                 wait_on_buffer (bh);
 353                 if (!buffer_uptodate(bh))
 354                         goto out;
 355         }
 356         if (uspi->fs_magic == UFS2_MAGIC)
 357                 p = (__fs64 *)bh->b_data + block;
 358         else
 359                 p = (__fs32 *)bh->b_data + block;
 360 repeat:
 361         tmp = ufs_data_ptr_to_cpu(sb, p);
 362         if (tmp) {
 363                 if (!phys) {
 364                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 365                         if (tmp == ufs_data_ptr_to_cpu(sb, p))
 366                                 goto out;
 367                         brelse (result);
 368                         goto repeat;
 369                 } else {
 370                         *phys = uspi->s_sbbase + tmp + blockoff;
 371                         goto out;
 372                 }
 373         }
 374
 375         if (block && (uspi->fs_magic == UFS2_MAGIC ?
 376                       (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
 377                       (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
 378                 goal = tmp + uspi->s_fpb;
 379         else
 380                 goal = bh->b_blocknr + uspi->s_fpb;
 381         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
 382                                 uspi->s_fpb, err, locked_page);
 383         if (!tmp) {
 384                 if (ufs_data_ptr_to_cpu(sb, p))
 385                         goto repeat;
 386                 goto out;
 387         }
 388
 389
 390         if (!phys) {
 391                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 392         } else {
 393                 *phys = uspi->s_sbbase + tmp + blockoff;
 394                 *new = 1;
 395         }
 396
 397         mark_buffer_dirty(bh);
 398         if (IS_SYNC(inode))
 399                 sync_dirty_buffer(bh);
 400         inode->i_ctime = CURRENT_TIME_SEC;
 401         mark_inode_dirty(inode);
 402         UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
 403 out:
 404         brelse (bh);
 405         UFSD("EXIT\n");
 406         return result;
 407 }
 408
 409 /**
 410  * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
 411  * readpage, writepage and so on
 412  */
 413
 414 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 415 {
 416         struct super_block * sb = inode->i_sb;
 417         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
 418         struct buffer_head * bh;
 419         int ret, err, new;
 420         unsigned long ptr,phys;
 421         u64 phys64 = 0;
 422
 423         if (!create) {
 424                 phys64 = ufs_frag_map(inode, fragment);
 425                 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
 426                 if (phys64)
 427                         map_bh(bh_result, sb, phys64);
 428                 return 0;
 429         }
 430
 431         /* This code entered only while writing ....? */
 432
 433         err = -EIO;
 434         new = 0;
 435         ret = 0;
 436         bh = NULL;
 437
 438         lock_kernel();
 439
 440         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
 441         if (fragment >
 442             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 443              << uspi->s_fpbshift))
 444                 goto abort_too_big;
 445
 446         err = 0;
 447         ptr = fragment;
 448
 449         /*
 450          * ok, these macros clean the logic up a bit and make
 451          * it much more readable:
 452          */
 453 #define GET_INODE_DATABLOCK(x) \
 454         ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
 455                           bh_result->b_page)
 456 #define GET_INODE_PTR(x) \
 457         ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
 458                           bh_result->b_page)
 459 #define GET_INDIRECT_DATABLOCK(x) \
 460         ufs_inode_getblock(inode, bh, x, fragment,      \
 461                           &err, &phys, &new, bh_result->b_page)
 462 #define GET_INDIRECT_PTR(x) \
 463         ufs_inode_getblock(inode, bh, x, fragment,      \
 464                           &err, NULL, NULL, NULL)
 465
 466         if (ptr < UFS_NDIR_FRAGMENT) {
 467                 bh = GET_INODE_DATABLOCK(ptr);
 468                 goto out;
 469         }
 470         ptr -= UFS_NDIR_FRAGMENT;
 471         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 472                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 473                 goto get_indirect;
 474         }
 475         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 476         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 477                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 478                 goto get_double;
 479         }
 480         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 481         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 482         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 483 get_double:
 484         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 485 get_indirect:
 486         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 487
 488 #undef GET_INODE_DATABLOCK
 489 #undef GET_INODE_PTR
 490 #undef GET_INDIRECT_DATABLOCK
 491 #undef GET_INDIRECT_PTR
 492
 493 out:
 494         if (err)
 495                 goto abort;
 496         if (new)
 497                 set_buffer_new(bh_result);
 498         map_bh(bh_result, sb, phys);
 499 abort:
 500         unlock_kernel();
 501         return err;
 502
 503 abort_too_big:
 504         ufs_warning(sb, "ufs_get_block", "block > big");
 505         goto abort;
 506 }
 507
 508 static struct buffer_head *ufs_getfrag(struct inode *inode,
 509                                        unsigned int fragment,
 510                                        int create, int *err)
 511 {
 512         struct buffer_head dummy;
 513         int error;
 514
 515         dummy.b_state = 0;
 516         dummy.b_blocknr = -1000;
 517         error = ufs_getfrag_block(inode, fragment, &dummy, create);
 518         *err = error;
 519         if (!error && buffer_mapped(&dummy)) {
 520                 struct buffer_head *bh;
 521                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
 522                 if (buffer_new(&dummy)) {
 523                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
 524                         set_buffer_uptodate(bh);
 525                         mark_buffer_dirty(bh);
 526                 }
 527                 return bh;
 528         }
 529         return NULL;
 530 }
 531
 532 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
 533         int create, int * err)
 534 {
 535         struct buffer_head * bh;
 536
 537         UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
 538         bh = ufs_getfrag (inode, fragment, create, err);
 539         if (!bh || buffer_uptodate(bh))
 540                 return bh;
 541         ll_rw_block (READ, 1, &bh);
 542         wait_on_buffer (bh);
 543         if (buffer_uptodate(bh))
 544                 return bh;
 545         brelse (bh);
 546         *err = -EIO;
 547         return NULL;
 548 }
 549
 550 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 551 {
 552         return block_write_full_page(page,ufs_getfrag_block,wbc);
 553 }
 554
 555 static int ufs_readpage(struct file *file, struct page *page)
 556 {
 557         return block_read_full_page(page,ufs_getfrag_block);
 558 }
 559
 560 int __ufs_write_begin(struct file *file, struct address_space *mapping,
 561                         loff_t pos, unsigned len, unsigned flags,
 562                         struct page **pagep, void **fsdata)
 563 {
 564         return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 565                                 ufs_getfrag_block);
 566 }
 567
 568 static int ufs_write_begin(struct file *file, struct address_space *mapping,
 569                         loff_t pos, unsigned len, unsigned flags,
 570                         struct page **pagep, void **fsdata)
 571 {
 572         *pagep = NULL;
 573         return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
 574 }
 575
 576 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 577 {
 578         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 579 }
 580
 581 const struct address_space_operations ufs_aops = {
 582         .readpage = ufs_readpage,
 583         .writepage = ufs_writepage,
 584         .sync_page = block_sync_page,
 585         .write_begin = ufs_write_begin,
 586         .write_end = generic_write_end,
 587         .bmap = ufs_bmap
 588 };
 589
 590 static void ufs_set_inode_ops(struct inode *inode)
 591 {
 592         if (S_ISREG(inode->i_mode)) {
 593                 inode->i_op = &ufs_file_inode_operations;
 594                 inode->i_fop = &ufs_file_operations;
 595                 inode->i_mapping->a_ops = &ufs_aops;
 596         } else if (S_ISDIR(inode->i_mode)) {
 597                 inode->i_op = &ufs_dir_inode_operations;
 598                 inode->i_fop = &ufs_dir_operations;
 599                 inode->i_mapping->a_ops = &ufs_aops;
 600         } else if (S_ISLNK(inode->i_mode)) {
 601                 if (!inode->i_blocks)
 602                         inode->i_op = &ufs_fast_symlink_inode_operations;
 603                 else {
 604                         inode->i_op = &page_symlink_inode_operations;
 605                         inode->i_mapping->a_ops = &ufs_aops;
 606                 }
 607         } else
 608                 init_special_inode(inode, inode->i_mode,
 609                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
 610 }
 611
 612 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 613 {
 614         struct ufs_inode_info *ufsi = UFS_I(inode);
 615         struct super_block *sb = inode->i_sb;
 616         mode_t mode;
 617
 618         /*
 619          * Copy data to the in-core inode.
 620          */
 621         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 622         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
 623         if (inode->i_nlink == 0) {
 624                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 625                 return -1;
 626         }
 627
 628         /*
 629          * Linux now has 32-bit uid and gid, so we can support EFT.
 630          */
 631         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 632         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 633
 634         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 635         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 636         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 637         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 638         inode->i_mtime.tv_nsec = 0;
 639         inode->i_atime.tv_nsec = 0;
 640         inode->i_ctime.tv_nsec = 0;
 641         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 642         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
 643         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 644         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 645         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 646
 647
 648         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 649                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
 650                        sizeof(ufs_inode->ui_u2.ui_addr));
 651         } else {
 652                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
 653                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
 654                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
 655         }
 656         return 0;
 657 }
 658
 659 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
 660 {
 661         struct ufs_inode_info *ufsi = UFS_I(inode);
 662         struct super_block *sb = inode->i_sb;
 663         mode_t mode;
 664
 665         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
 666         /*
 667          * Copy data to the in-core inode.
 668          */
 669         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 670         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
 671         if (inode->i_nlink == 0) {
 672                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 673                 return -1;
 674         }
 675
 676         /*
 677          * Linux now has 32-bit uid and gid, so we can support EFT.
 678          */
 679         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 680         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 681
 682         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 683         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
 684         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
 685         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
 686         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
 687         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
 688         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
 689         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 690         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 691         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 692         /*
 693         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 694         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 695         */
 696
 697         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 698                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
 699                        sizeof(ufs2_inode->ui_u2.ui_addr));
 700         } else {
 701                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
 702                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
 703                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
 704         }
 705         return 0;
 706 }
 707
 708 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
 709 {
 710         struct ufs_inode_info *ufsi;
 711         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 712         struct buffer_head * bh;
 713         struct inode *inode;
 714         int err;
 715
 716         UFSD("ENTER, ino %lu\n", ino);
 717
 718         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
 719                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
 720                             ino);
 721                 return ERR_PTR(-EIO);
 722         }
 723
 724         inode = iget_locked(sb, ino);
 725         if (!inode)
 726                 return ERR_PTR(-ENOMEM);
 727         if (!(inode->i_state & I_NEW))
 728                 return inode;
 729
 730         ufsi = UFS_I(inode);
 731
 732         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 733         if (!bh) {
 734                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
 735                             inode->i_ino);
 736                 goto bad_inode;
 737         }
 738         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 739                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 740
 741                 err = ufs2_read_inode(inode,
 742                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
 743         } else {
 744                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
 745
 746                 err = ufs1_read_inode(inode,
 747                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
 748         }
 749
 750         if (err)
 751                 goto bad_inode;
 752         inode->i_version++;
 753         ufsi->i_lastfrag =
 754                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 755         ufsi->i_dir_start_lookup = 0;
 756         ufsi->i_osync = 0;
 757
 758         ufs_set_inode_ops(inode);
 759
 760         brelse(bh);
 761
 762         UFSD("EXIT\n");
 763         unlock_new_inode(inode);
 764         return inode;
 765
 766 bad_inode:
 767         iget_failed(inode);
 768         return ERR_PTR(-EIO);
 769 }
 770
 771 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 772 {
 773         struct super_block *sb = inode->i_sb;
 774         struct ufs_inode_info *ufsi = UFS_I(inode);
 775
 776         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 777         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 778
 779         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 780         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 781
 782         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 783         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 784         ufs_inode->ui_atime.tv_usec = 0;
 785         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 786         ufs_inode->ui_ctime.tv_usec = 0;
 787         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 788         ufs_inode->ui_mtime.tv_usec = 0;
 789         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 790         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 791         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 792
 793         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
 794                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 795                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 796         }
 797
 798         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 799                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 800                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 801         } else if (inode->i_blocks) {
 802                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
 803                        sizeof(ufs_inode->ui_u2.ui_addr));
 804         }
 805         else {
 806                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 807                        sizeof(ufs_inode->ui_u2.ui_symlink));
 808         }
 809
 810         if (!inode->i_nlink)
 811                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
 812 }
 813
 814 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
 815 {
 816         struct super_block *sb = inode->i_sb;
 817         struct ufs_inode_info *ufsi = UFS_I(inode);
 818
 819         UFSD("ENTER\n");
 820         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 821         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 822
 823         ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
 824         ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
 825
 826         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 827         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
 828         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
 829         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
 830         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
 831         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
 832         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
 833
 834         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
 835         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 836         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 837
 838         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 839                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 840                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
 841         } else if (inode->i_blocks) {
 842                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
 843                        sizeof(ufs_inode->ui_u2.ui_addr));
 844         } else {
 845                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 846                        sizeof(ufs_inode->ui_u2.ui_symlink));
 847         }
 848
 849         if (!inode->i_nlink)
 850                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
 851         UFSD("EXIT\n");
 852 }
 853
 854 static int ufs_update_inode(struct inode * inode, int do_sync)
 855 {
 856         struct super_block *sb = inode->i_sb;
 857         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 858         struct buffer_head * bh;
 859
 860         UFSD("ENTER, ino %lu\n", inode->i_ino);
 861
 862         if (inode->i_ino < UFS_ROOTINO ||
 863             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 864                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 865                 return -1;
 866         }
 867
 868         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 869         if (!bh) {
 870                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 871                 return -1;
 872         }
 873         if (uspi->fs_magic == UFS2_MAGIC) {
 874                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 875
 876                 ufs2_update_inode(inode,
 877                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
 878         } else {
 879                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
 880
 881                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
 882         }
 883
 884         mark_buffer_dirty(bh);
 885         if (do_sync)
 886                 sync_dirty_buffer(bh);
 887         brelse (bh);
 888
 889         UFSD("EXIT\n");
 890         return 0;
 891 }
 892
 893 int ufs_write_inode (struct inode * inode, int wait)
 894 {
 895         int ret;
 896         lock_kernel();
 897         ret = ufs_update_inode (inode, wait);
 898         unlock_kernel();
 899         return ret;
 900 }
 901
 902 int ufs_sync_inode (struct inode *inode)
 903 {
 904         return ufs_update_inode (inode, 1);
 905 }
 906
 907 void ufs_delete_inode (struct inode * inode)
 908 {
 909         loff_t old_i_size;
 910
 911         truncate_inode_pages(&inode->i_data, 0);
 912         if (is_bad_inode(inode))
 913                 goto no_delete;
 914         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 915         lock_kernel();
 916         mark_inode_dirty(inode);
 917         ufs_update_inode(inode, IS_SYNC(inode));
 918         old_i_size = inode->i_size;
 919         inode->i_size = 0;
 920         if (inode->i_blocks && ufs_truncate(inode, old_i_size))
 921                 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
 922         ufs_free_inode (inode);
 923         unlock_kernel();
 924         return;
 925 no_delete:
 926         clear_inode(inode);     /* We must guarantee clearing of inode... */
 927 }