fs/ufs/inode.c

   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/ufs_fs.h>
  34 #include <linux/time.h>
  35 #include <linux/stat.h>
  36 #include <linux/string.h>
  37 #include <linux/mm.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/buffer_head.h>
  40
  41 #include "swab.h"
  42 #include "util.h"
  43
  44 #undef UFS_INODE_DEBUG
  45 #undef UFS_INODE_DEBUG_MORE
  46
  47 #ifdef UFS_INODE_DEBUG
  48 #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
  49 #else
  50 #define UFSD(x)
  51 #endif
  52
  53 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
  54 {
  55         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
  56         int ptrs = uspi->s_apb;
  57         int ptrs_bits = uspi->s_apbshift;
  58         const long direct_blocks = UFS_NDADDR,
  59                 indirect_blocks = ptrs,
  60                 double_blocks = (1 << (ptrs_bits * 2));
  61         int n = 0;
  62
  63
  64         UFSD(("ptrs=uspi->s_apb = %d,double_blocks=%d \n",ptrs,double_blocks));
  65         if (i_block < 0) {
  66                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0");
  67         } else if (i_block < direct_blocks) {
  68                 offsets[n++] = i_block;
  69         } else if ((i_block -= direct_blocks) < indirect_blocks) {
  70                 offsets[n++] = UFS_IND_BLOCK;
  71                 offsets[n++] = i_block;
  72         } else if ((i_block -= indirect_blocks) < double_blocks) {
  73                 offsets[n++] = UFS_DIND_BLOCK;
  74                 offsets[n++] = i_block >> ptrs_bits;
  75                 offsets[n++] = i_block & (ptrs - 1);
  76         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  77                 offsets[n++] = UFS_TIND_BLOCK;
  78                 offsets[n++] = i_block >> (ptrs_bits * 2);
  79                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  80                 offsets[n++] = i_block & (ptrs - 1);
  81         } else {
  82                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  83         }
  84         return n;
  85 }
  86
  87 /*
  88  * Returns the location of the fragment from
  89  * the begining of the filesystem.
  90  */
  91
  92 u64  ufs_frag_map(struct inode *inode, sector_t frag)
  93 {
  94         struct ufs_inode_info *ufsi = UFS_I(inode);
  95         struct super_block *sb = inode->i_sb;
  96         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
  97         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
  98         int shift = uspi->s_apbshift-uspi->s_fpbshift;
  99         sector_t offsets[4], *p;
 100         int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
 101         u64  ret = 0L;
 102         __fs32 block;
 103         __fs64 u2_block = 0L;
 104         unsigned flags = UFS_SB(sb)->s_flags;
 105         u64 temp = 0L;
 106
 107         UFSD((": frag = %lu  depth = %d\n",frag,depth));
 108         UFSD((": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",uspi->s_fpbshift,uspi->s_apbmask,mask));
 109
 110         if (depth == 0)
 111                 return 0;
 112
 113         p = offsets;
 114
 115         lock_kernel();
 116         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 117                 goto ufs2;
 118
 119         block = ufsi->i_u1.i_data[*p++];
 120         if (!block)
 121                 goto out;
 122         while (--depth) {
 123                 struct buffer_head *bh;
 124                 sector_t n = *p++;
 125
 126                 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
 127                 if (!bh)
 128                         goto out;
 129                 block = ((__fs32 *) bh->b_data)[n & mask];
 130                 brelse (bh);
 131                 if (!block)
 132                         goto out;
 133         }
 134         ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
 135         goto out;
 136 ufs2:
 137         u2_block = ufsi->i_u1.u2_i_data[*p++];
 138         if (!u2_block)
 139                 goto out;
 140
 141
 142         while (--depth) {
 143                 struct buffer_head *bh;
 144                 sector_t n = *p++;
 145
 146
 147                 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
 148                 bh = sb_bread(sb, temp +(u64) (n>>shift));
 149                 if (!bh)
 150                         goto out;
 151                 u2_block = ((__fs64 *)bh->b_data)[n & mask];
 152                 brelse(bh);
 153                 if (!u2_block)
 154                         goto out;
 155         }
 156         temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
 157         ret = temp + (u64) (frag & uspi->s_fpbmask);
 158
 159 out:
 160         unlock_kernel();
 161         return ret;
 162 }
 163
 164 static struct buffer_head * ufs_inode_getfrag (struct inode *inode,
 165         unsigned int fragment, unsigned int new_fragment,
 166         unsigned int required, int *err, int metadata, long *phys, int *new)
 167 {
 168         struct ufs_inode_info *ufsi = UFS_I(inode);
 169         struct super_block * sb;
 170         struct ufs_sb_private_info * uspi;
 171         struct buffer_head * result;
 172         unsigned block, blockoff, lastfrag, lastblock, lastblockoff;
 173         unsigned tmp, goal;
 174         __fs32 * p, * p2;
 175         unsigned flags = 0;
 176
 177         UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u, required %u\n",
 178                 inode->i_ino, fragment, new_fragment, required))
 179
 180         sb = inode->i_sb;
 181         uspi = UFS_SB(sb)->s_uspi;
 182
 183         flags = UFS_SB(sb)->s_flags;
 184         /* TODO : to be done for write support
 185         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 186              goto ufs2;
 187          */
 188
 189         block = ufs_fragstoblks (fragment);
 190         blockoff = ufs_fragnum (fragment);
 191         p = ufsi->i_u1.i_data + block;
 192         goal = 0;
 193
 194 repeat:
 195         tmp = fs32_to_cpu(sb, *p);
 196         lastfrag = ufsi->i_lastfrag;
 197         if (tmp && fragment < lastfrag) {
 198                 if (metadata) {
 199                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 200                         if (tmp == fs32_to_cpu(sb, *p)) {
 201                                 UFSD(("EXIT, result %u\n", tmp + blockoff))
 202                                 return result;
 203                         }
 204                         brelse (result);
 205                         goto repeat;
 206                 } else {
 207                         *phys = tmp;
 208                         return NULL;
 209                 }
 210         }
 211
 212         lastblock = ufs_fragstoblks (lastfrag);
 213         lastblockoff = ufs_fragnum (lastfrag);
 214         /*
 215          * We will extend file into new block beyond last allocated block
 216          */
 217         if (lastblock < block) {
 218                 /*
 219                  * We must reallocate last allocated block
 220                  */
 221                 if (lastblockoff) {
 222                         p2 = ufsi->i_u1.i_data + lastblock;
 223                         tmp = ufs_new_fragments (inode, p2, lastfrag,
 224                                 fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, err);
 225                         if (!tmp) {
 226                                 if (lastfrag != ufsi->i_lastfrag)
 227                                         goto repeat;
 228                                 else
 229                                         return NULL;
 230                         }
 231                         lastfrag = ufsi->i_lastfrag;
 232
 233                 }
 234                 goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb;
 235                 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
 236                         goal, required + blockoff, err);
 237         }
 238         /*
 239          * We will extend last allocated block
 240          */
 241         else if (lastblock == block) {
 242                 tmp = ufs_new_fragments (inode, p, fragment - (blockoff - lastblockoff),
 243                         fs32_to_cpu(sb, *p), required +  (blockoff - lastblockoff), err);
 244         }
 245         /*
 246          * We will allocate new block before last allocated block
 247          */
 248         else /* (lastblock > block) */ {
 249                 if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1])))
 250                         goal = tmp + uspi->s_fpb;
 251                 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
 252                         goal, uspi->s_fpb, err);
 253         }
 254         if (!tmp) {
 255                 if ((!blockoff && *p) ||
 256                     (blockoff && lastfrag != ufsi->i_lastfrag))
 257                         goto repeat;
 258                 *err = -ENOSPC;
 259                 return NULL;
 260         }
 261
 262         /* The nullification of framgents done in ufs/balloc.c is
 263          * something I don't have the stomache to move into here right
 264          * now. -DaveM
 265          */
 266         if (metadata) {
 267                 result = sb_getblk(inode->i_sb, tmp + blockoff);
 268         } else {
 269                 *phys = tmp;
 270                 result = NULL;
 271                 *err = 0;
 272                 *new = 1;
 273         }
 274
 275         inode->i_ctime = CURRENT_TIME_SEC;
 276         if (IS_SYNC(inode))
 277                 ufs_sync_inode (inode);
 278         mark_inode_dirty(inode);
 279         UFSD(("EXIT, result %u\n", tmp + blockoff))
 280         return result;
 281
 282      /* This part : To be implemented ....
 283         Required only for writing, not required for READ-ONLY.
 284 ufs2:
 285
 286         u2_block = ufs_fragstoblks(fragment);
 287         u2_blockoff = ufs_fragnum(fragment);
 288         p = ufsi->i_u1.u2_i_data + block;
 289         goal = 0;
 290
 291 repeat2:
 292         tmp = fs32_to_cpu(sb, *p);
 293         lastfrag = ufsi->i_lastfrag;
 294
 295      */
 296 }
 297
 298 static struct buffer_head * ufs_block_getfrag (struct inode *inode,
 299         struct buffer_head *bh, unsigned int fragment, unsigned int new_fragment,
 300         unsigned int blocksize, int * err, int metadata, long *phys, int *new)
 301 {
 302         struct super_block * sb;
 303         struct ufs_sb_private_info * uspi;
 304         struct buffer_head * result;
 305         unsigned tmp, goal, block, blockoff;
 306         __fs32 * p;
 307
 308         sb = inode->i_sb;
 309         uspi = UFS_SB(sb)->s_uspi;
 310         block = ufs_fragstoblks (fragment);
 311         blockoff = ufs_fragnum (fragment);
 312
 313         UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u\n", inode->i_ino, fragment, new_fragment))
 314
 315         result = NULL;
 316         if (!bh)
 317                 goto out;
 318         if (!buffer_uptodate(bh)) {
 319                 ll_rw_block (READ, 1, &bh);
 320                 wait_on_buffer (bh);
 321                 if (!buffer_uptodate(bh))
 322                         goto out;
 323         }
 324
 325         p = (__fs32 *) bh->b_data + block;
 326 repeat:
 327         tmp = fs32_to_cpu(sb, *p);
 328         if (tmp) {
 329                 if (metadata) {
 330                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 331                         if (tmp == fs32_to_cpu(sb, *p))
 332                                 goto out;
 333                         brelse (result);
 334                         goto repeat;
 335                 } else {
 336                         *phys = tmp;
 337                         goto out;
 338                 }
 339         }
 340
 341         if (block && (tmp = fs32_to_cpu(sb, ((__fs32*)bh->b_data)[block-1]) + uspi->s_fpb))
 342                 goal = tmp + uspi->s_fpb;
 343         else
 344                 goal = bh->b_blocknr + uspi->s_fpb;
 345         tmp = ufs_new_fragments (inode, p, ufs_blknum(new_fragment), goal, uspi->s_fpb, err);
 346         if (!tmp) {
 347                 if (fs32_to_cpu(sb, *p))
 348                         goto repeat;
 349                 goto out;
 350         }
 351
 352         /* The nullification of framgents done in ufs/balloc.c is
 353          * something I don't have the stomache to move into here right
 354          * now. -DaveM
 355          */
 356         if (metadata) {
 357                 result = sb_getblk(sb, tmp + blockoff);
 358         } else {
 359                 *phys = tmp;
 360                 *new = 1;
 361         }
 362
 363         mark_buffer_dirty(bh);
 364         if (IS_SYNC(inode))
 365                 sync_dirty_buffer(bh);
 366         inode->i_ctime = CURRENT_TIME_SEC;
 367         mark_inode_dirty(inode);
 368 out:
 369         brelse (bh);
 370         UFSD(("EXIT, result %u\n", tmp + blockoff))
 371         return result;
 372 }
 373
 374 /*
 375  * This function gets the block which contains the fragment.
 376  */
 377
 378 static int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 379 {
 380         struct super_block * sb = inode->i_sb;
 381         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
 382         struct buffer_head * bh;
 383         int ret, err, new;
 384         unsigned long ptr,phys;
 385         u64 phys64 = 0;
 386
 387         if (!create) {
 388                 phys64 = ufs_frag_map(inode, fragment);
 389                 UFSD(("phys64 = %lu \n",phys64));
 390                 if (phys64)
 391                         map_bh(bh_result, sb, phys64);
 392                 return 0;
 393         }
 394
 395         /* This code entered only while writing ....? */
 396
 397         err = -EIO;
 398         new = 0;
 399         ret = 0;
 400         bh = NULL;
 401
 402         lock_kernel();
 403
 404         UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment))
 405         if (fragment < 0)
 406                 goto abort_negative;
 407         if (fragment >
 408             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 409              << uspi->s_fpbshift))
 410                 goto abort_too_big;
 411
 412         err = 0;
 413         ptr = fragment;
 414
 415         /*
 416          * ok, these macros clean the logic up a bit and make
 417          * it much more readable:
 418          */
 419 #define GET_INODE_DATABLOCK(x) \
 420                 ufs_inode_getfrag(inode, x, fragment, 1, &err, 0, &phys, &new)
 421 #define GET_INODE_PTR(x) \
 422                 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, 1, NULL, NULL)
 423 #define GET_INDIRECT_DATABLOCK(x) \
 424                 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
 425                                   &err, 0, &phys, &new);
 426 #define GET_INDIRECT_PTR(x) \
 427                 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
 428                                   &err, 1, NULL, NULL);
 429
 430         if (ptr < UFS_NDIR_FRAGMENT) {
 431                 bh = GET_INODE_DATABLOCK(ptr);
 432                 goto out;
 433         }
 434         ptr -= UFS_NDIR_FRAGMENT;
 435         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 436                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 437                 goto get_indirect;
 438         }
 439         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 440         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 441                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 442                 goto get_double;
 443         }
 444         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 445         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 446         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 447 get_double:
 448         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 449 get_indirect:
 450         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 451
 452 #undef GET_INODE_DATABLOCK
 453 #undef GET_INODE_PTR
 454 #undef GET_INDIRECT_DATABLOCK
 455 #undef GET_INDIRECT_PTR
 456
 457 out:
 458         if (err)
 459                 goto abort;
 460         if (new)
 461                 set_buffer_new(bh_result);
 462         map_bh(bh_result, sb, phys);
 463 abort:
 464         unlock_kernel();
 465         return err;
 466
 467 abort_negative:
 468         ufs_warning(sb, "ufs_get_block", "block < 0");
 469         goto abort;
 470
 471 abort_too_big:
 472         ufs_warning(sb, "ufs_get_block", "block > big");
 473         goto abort;
 474 }
 475
 476 struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment,
 477                                 int create, int *err)
 478 {
 479         struct buffer_head dummy;
 480         int error;
 481
 482         dummy.b_state = 0;
 483         dummy.b_blocknr = -1000;
 484         error = ufs_getfrag_block(inode, fragment, &dummy, create);
 485         *err = error;
 486         if (!error && buffer_mapped(&dummy)) {
 487                 struct buffer_head *bh;
 488                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
 489                 if (buffer_new(&dummy)) {
 490                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
 491                         set_buffer_uptodate(bh);
 492                         mark_buffer_dirty(bh);
 493                 }
 494                 return bh;
 495         }
 496         return NULL;
 497 }
 498
 499 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
 500         int create, int * err)
 501 {
 502         struct buffer_head * bh;
 503
 504         UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment))
 505         bh = ufs_getfrag (inode, fragment, create, err);
 506         if (!bh || buffer_uptodate(bh))
 507                 return bh;
 508         ll_rw_block (READ, 1, &bh);
 509         wait_on_buffer (bh);
 510         if (buffer_uptodate(bh))
 511                 return bh;
 512         brelse (bh);
 513         *err = -EIO;
 514         return NULL;
 515 }
 516
 517 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 518 {
 519         return block_write_full_page(page,ufs_getfrag_block,wbc);
 520 }
 521 static int ufs_readpage(struct file *file, struct page *page)
 522 {
 523         return block_read_full_page(page,ufs_getfrag_block);
 524 }
 525 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
 526 {
 527         return block_prepare_write(page,from,to,ufs_getfrag_block);
 528 }
 529 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 530 {
 531         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 532 }
 533 struct address_space_operations ufs_aops = {
 534         .readpage = ufs_readpage,
 535         .writepage = ufs_writepage,
 536         .sync_page = block_sync_page,
 537         .prepare_write = ufs_prepare_write,
 538         .commit_write = generic_commit_write,
 539         .bmap = ufs_bmap
 540 };
 541
 542 void ufs_read_inode (struct inode * inode)
 543 {
 544         struct ufs_inode_info *ufsi = UFS_I(inode);
 545         struct super_block * sb;
 546         struct ufs_sb_private_info * uspi;
 547         struct ufs_inode * ufs_inode;
 548         struct ufs2_inode *ufs2_inode;
 549         struct buffer_head * bh;
 550         mode_t mode;
 551         unsigned i;
 552         unsigned flags;
 553
 554         UFSD(("ENTER, ino %lu\n", inode->i_ino))
 555
 556         sb = inode->i_sb;
 557         uspi = UFS_SB(sb)->s_uspi;
 558         flags = UFS_SB(sb)->s_flags;
 559
 560         if (inode->i_ino < UFS_ROOTINO ||
 561             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 562                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 563                 goto bad_inode;
 564         }
 565
 566         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 567         if (!bh) {
 568                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 569                 goto bad_inode;
 570         }
 571         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 572                 goto ufs2_inode;
 573
 574         ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino));
 575
 576         /*
 577          * Copy data to the in-core inode.
 578          */
 579         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 580         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
 581         if (inode->i_nlink == 0)
 582                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 583
 584         /*
 585          * Linux now has 32-bit uid and gid, so we can support EFT.
 586          */
 587         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 588         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 589
 590         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 591         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 592         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 593         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 594         inode->i_mtime.tv_nsec = 0;
 595         inode->i_atime.tv_nsec = 0;
 596         inode->i_ctime.tv_nsec = 0;
 597         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 598         inode->i_blksize = PAGE_SIZE;   /* This is the optimal IO size (for stat) */
 599         inode->i_version++;
 600         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 601         ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen);
 602         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 603         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 604         ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 605
 606         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 607                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 608                         ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
 609         }
 610         else {
 611                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 612                         ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
 613         }
 614         ufsi->i_osync = 0;
 615
 616         if (S_ISREG(inode->i_mode)) {
 617                 inode->i_op = &ufs_file_inode_operations;
 618                 inode->i_fop = &ufs_file_operations;
 619                 inode->i_mapping->a_ops = &ufs_aops;
 620         } else if (S_ISDIR(inode->i_mode)) {
 621                 inode->i_op = &ufs_dir_inode_operations;
 622                 inode->i_fop = &ufs_dir_operations;
 623         } else if (S_ISLNK(inode->i_mode)) {
 624                 if (!inode->i_blocks)
 625                         inode->i_op = &ufs_fast_symlink_inode_operations;
 626                 else {
 627                         inode->i_op = &page_symlink_inode_operations;
 628                         inode->i_mapping->a_ops = &ufs_aops;
 629                 }
 630         } else
 631                 init_special_inode(inode, inode->i_mode,
 632                         ufs_get_inode_dev(sb, ufsi));
 633
 634         brelse (bh);
 635
 636         UFSD(("EXIT\n"))
 637         return;
 638
 639 bad_inode:
 640         make_bad_inode(inode);
 641         return;
 642
 643 ufs2_inode :
 644         UFSD(("Reading ufs2 inode, ino %lu\n", inode->i_ino))
 645
 646         ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino));
 647
 648         /*
 649          * Copy data to the in-core inode.
 650          */
 651         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 652         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
 653         if (inode->i_nlink == 0)
 654                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 655
 656         /*
 657          * Linux now has 32-bit uid and gid, so we can support EFT.
 658          */
 659         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 660         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 661
 662         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 663         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec);
 664         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec);
 665         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec);
 666         inode->i_mtime.tv_nsec = 0;
 667         inode->i_atime.tv_nsec = 0;
 668         inode->i_ctime.tv_nsec = 0;
 669         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 670         inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/
 671
 672         inode->i_version++;
 673         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 674         ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 675         /*
 676         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 677         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 678         */
 679         ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift;
 680
 681         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 682                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 683                         ufsi->i_u1.u2_i_data[i] =
 684                                 ufs2_inode->ui_u2.ui_addr.ui_db[i];
 685         }
 686         else {
 687                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 688                         ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
 689         }
 690         ufsi->i_osync = 0;
 691
 692         if (S_ISREG(inode->i_mode)) {
 693                 inode->i_op = &ufs_file_inode_operations;
 694                 inode->i_fop = &ufs_file_operations;
 695                 inode->i_mapping->a_ops = &ufs_aops;
 696         } else if (S_ISDIR(inode->i_mode)) {
 697                 inode->i_op = &ufs_dir_inode_operations;
 698                 inode->i_fop = &ufs_dir_operations;
 699         } else if (S_ISLNK(inode->i_mode)) {
 700                 if (!inode->i_blocks)
 701                         inode->i_op = &ufs_fast_symlink_inode_operations;
 702                 else {
 703                         inode->i_op = &page_symlink_inode_operations;
 704                         inode->i_mapping->a_ops = &ufs_aops;
 705                 }
 706         } else   /* TODO  : here ...*/
 707                 init_special_inode(inode, inode->i_mode,
 708                         ufs_get_inode_dev(sb, ufsi));
 709
 710         brelse(bh);
 711
 712         UFSD(("EXIT\n"))
 713         return;
 714 }
 715
 716 static int ufs_update_inode(struct inode * inode, int do_sync)
 717 {
 718         struct ufs_inode_info *ufsi = UFS_I(inode);
 719         struct super_block * sb;
 720         struct ufs_sb_private_info * uspi;
 721         struct buffer_head * bh;
 722         struct ufs_inode * ufs_inode;
 723         unsigned i;
 724         unsigned flags;
 725
 726         UFSD(("ENTER, ino %lu\n", inode->i_ino))
 727
 728         sb = inode->i_sb;
 729         uspi = UFS_SB(sb)->s_uspi;
 730         flags = UFS_SB(sb)->s_flags;
 731
 732         if (inode->i_ino < UFS_ROOTINO ||
 733             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 734                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 735                 return -1;
 736         }
 737
 738         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 739         if (!bh) {
 740                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 741                 return -1;
 742         }
 743         ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode));
 744
 745         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 746         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 747
 748         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 749         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 750
 751         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 752         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 753         ufs_inode->ui_atime.tv_usec = 0;
 754         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 755         ufs_inode->ui_ctime.tv_usec = 0;
 756         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 757         ufs_inode->ui_mtime.tv_usec = 0;
 758         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 759         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 760         ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen);
 761
 762         if ((flags & UFS_UID_MASK) == UFS_UID_EFT) {
 763                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 764                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 765         }
 766
 767         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 768                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 769                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 770         } else if (inode->i_blocks) {
 771                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 772                         ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
 773         }
 774         else {
 775                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 776                         ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
 777         }
 778
 779         if (!inode->i_nlink)
 780                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
 781
 782         mark_buffer_dirty(bh);
 783         if (do_sync)
 784                 sync_dirty_buffer(bh);
 785         brelse (bh);
 786
 787         UFSD(("EXIT\n"))
 788         return 0;
 789 }
 790
 791 int ufs_write_inode (struct inode * inode, int wait)
 792 {
 793         int ret;
 794         lock_kernel();
 795         ret = ufs_update_inode (inode, wait);
 796         unlock_kernel();
 797         return ret;
 798 }
 799
 800 int ufs_sync_inode (struct inode *inode)
 801 {
 802         return ufs_update_inode (inode, 1);
 803 }
 804
 805 void ufs_delete_inode (struct inode * inode)
 806 {
 807         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 808         lock_kernel();
 809         mark_inode_dirty(inode);
 810         ufs_update_inode(inode, IS_SYNC(inode));
 811         inode->i_size = 0;
 812         if (inode->i_blocks)
 813                 ufs_truncate (inode);
 814         ufs_free_inode (inode);
 815         unlock_kernel();
 816 }