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=%ld \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 = %llu  depth = %d\n", (unsigned long long)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         UFSD(("result %u\n", tmp + blockoff));
 369 out:
 370         brelse (bh);
 371         UFSD(("EXIT\n"));
 372         return result;
 373 }
 374
 375 /*
 376  * This function gets the block which contains the fragment.
 377  */
 378
 379 int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 380 {
 381         struct super_block * sb = inode->i_sb;
 382         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
 383         struct buffer_head * bh;
 384         int ret, err, new;
 385         unsigned long ptr,phys;
 386         u64 phys64 = 0;
 387
 388         if (!create) {
 389                 phys64 = ufs_frag_map(inode, fragment);
 390                 UFSD(("phys64 = %llu \n",phys64));
 391                 if (phys64)
 392                         map_bh(bh_result, sb, phys64);
 393                 return 0;
 394         }
 395
 396         /* This code entered only while writing ....? */
 397
 398         err = -EIO;
 399         new = 0;
 400         ret = 0;
 401         bh = NULL;
 402
 403         lock_kernel();
 404
 405         UFSD(("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment))
 406         if (fragment < 0)
 407                 goto abort_negative;
 408         if (fragment >
 409             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 410              << uspi->s_fpbshift))
 411                 goto abort_too_big;
 412
 413         err = 0;
 414         ptr = fragment;
 415
 416         /*
 417          * ok, these macros clean the logic up a bit and make
 418          * it much more readable:
 419          */
 420 #define GET_INODE_DATABLOCK(x) \
 421                 ufs_inode_getfrag(inode, x, fragment, 1, &err, 0, &phys, &new)
 422 #define GET_INODE_PTR(x) \
 423                 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, 1, NULL, NULL)
 424 #define GET_INDIRECT_DATABLOCK(x) \
 425                 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
 426                                   &err, 0, &phys, &new);
 427 #define GET_INDIRECT_PTR(x) \
 428                 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
 429                                   &err, 1, NULL, NULL);
 430
 431         if (ptr < UFS_NDIR_FRAGMENT) {
 432                 bh = GET_INODE_DATABLOCK(ptr);
 433                 goto out;
 434         }
 435         ptr -= UFS_NDIR_FRAGMENT;
 436         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 437                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 438                 goto get_indirect;
 439         }
 440         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 441         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 442                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 443                 goto get_double;
 444         }
 445         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 446         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 447         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 448 get_double:
 449         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 450 get_indirect:
 451         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 452
 453 #undef GET_INODE_DATABLOCK
 454 #undef GET_INODE_PTR
 455 #undef GET_INDIRECT_DATABLOCK
 456 #undef GET_INDIRECT_PTR
 457
 458 out:
 459         if (err)
 460                 goto abort;
 461         if (new)
 462                 set_buffer_new(bh_result);
 463         map_bh(bh_result, sb, phys);
 464 abort:
 465         unlock_kernel();
 466         return err;
 467
 468 abort_negative:
 469         ufs_warning(sb, "ufs_get_block", "block < 0");
 470         goto abort;
 471
 472 abort_too_big:
 473         ufs_warning(sb, "ufs_get_block", "block > big");
 474         goto abort;
 475 }
 476
 477 struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment,
 478                                 int create, int *err)
 479 {
 480         struct buffer_head dummy;
 481         int error;
 482
 483         dummy.b_state = 0;
 484         dummy.b_blocknr = -1000;
 485         error = ufs_getfrag_block(inode, fragment, &dummy, create);
 486         *err = error;
 487         if (!error && buffer_mapped(&dummy)) {
 488                 struct buffer_head *bh;
 489                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
 490                 if (buffer_new(&dummy)) {
 491                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
 492                         set_buffer_uptodate(bh);
 493                         mark_buffer_dirty(bh);
 494                 }
 495                 return bh;
 496         }
 497         return NULL;
 498 }
 499
 500 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
 501         int create, int * err)
 502 {
 503         struct buffer_head * bh;
 504
 505         UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment))
 506         bh = ufs_getfrag (inode, fragment, create, err);
 507         if (!bh || buffer_uptodate(bh))
 508                 return bh;
 509         ll_rw_block (READ, 1, &bh);
 510         wait_on_buffer (bh);
 511         if (buffer_uptodate(bh))
 512                 return bh;
 513         brelse (bh);
 514         *err = -EIO;
 515         return NULL;
 516 }
 517
 518 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 519 {
 520         return block_write_full_page(page,ufs_getfrag_block,wbc);
 521 }
 522 static int ufs_readpage(struct file *file, struct page *page)
 523 {
 524         return block_read_full_page(page,ufs_getfrag_block);
 525 }
 526 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
 527 {
 528         return block_prepare_write(page,from,to,ufs_getfrag_block);
 529 }
 530 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 531 {
 532         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 533 }
 534 struct address_space_operations ufs_aops = {
 535         .readpage = ufs_readpage,
 536         .writepage = ufs_writepage,
 537         .sync_page = block_sync_page,
 538         .prepare_write = ufs_prepare_write,
 539         .commit_write = generic_commit_write,
 540         .bmap = ufs_bmap
 541 };
 542
 543 void ufs_read_inode (struct inode * inode)
 544 {
 545         struct ufs_inode_info *ufsi = UFS_I(inode);
 546         struct super_block * sb;
 547         struct ufs_sb_private_info * uspi;
 548         struct ufs_inode * ufs_inode;
 549         struct ufs2_inode *ufs2_inode;
 550         struct buffer_head * bh;
 551         mode_t mode;
 552         unsigned i;
 553         unsigned flags;
 554
 555         UFSD(("ENTER, ino %lu\n", inode->i_ino))
 556
 557         sb = inode->i_sb;
 558         uspi = UFS_SB(sb)->s_uspi;
 559         flags = UFS_SB(sb)->s_flags;
 560
 561         if (inode->i_ino < UFS_ROOTINO ||
 562             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 563                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 564                 goto bad_inode;
 565         }
 566
 567         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 568         if (!bh) {
 569                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 570                 goto bad_inode;
 571         }
 572         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 573                 goto ufs2_inode;
 574
 575         ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino));
 576
 577         /*
 578          * Copy data to the in-core inode.
 579          */
 580         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 581         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
 582         if (inode->i_nlink == 0)
 583                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 584
 585         /*
 586          * Linux now has 32-bit uid and gid, so we can support EFT.
 587          */
 588         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 589         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 590
 591         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 592         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 593         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 594         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 595         inode->i_mtime.tv_nsec = 0;
 596         inode->i_atime.tv_nsec = 0;
 597         inode->i_ctime.tv_nsec = 0;
 598         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 599         inode->i_blksize = PAGE_SIZE;   /* This is the optimal IO size (for stat) */
 600         inode->i_version++;
 601         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 602         ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen);
 603         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 604         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 605         ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 606
 607         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 608                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 609                         ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
 610         }
 611         else {
 612                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 613                         ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
 614         }
 615         ufsi->i_osync = 0;
 616
 617         if (S_ISREG(inode->i_mode)) {
 618                 inode->i_op = &ufs_file_inode_operations;
 619                 inode->i_fop = &ufs_file_operations;
 620                 inode->i_mapping->a_ops = &ufs_aops;
 621         } else if (S_ISDIR(inode->i_mode)) {
 622                 inode->i_op = &ufs_dir_inode_operations;
 623                 inode->i_fop = &ufs_dir_operations;
 624         } else if (S_ISLNK(inode->i_mode)) {
 625                 if (!inode->i_blocks)
 626                         inode->i_op = &ufs_fast_symlink_inode_operations;
 627                 else {
 628                         inode->i_op = &page_symlink_inode_operations;
 629                         inode->i_mapping->a_ops = &ufs_aops;
 630                 }
 631         } else
 632                 init_special_inode(inode, inode->i_mode,
 633                         ufs_get_inode_dev(sb, ufsi));
 634
 635         brelse (bh);
 636
 637         UFSD(("EXIT\n"))
 638         return;
 639
 640 bad_inode:
 641         make_bad_inode(inode);
 642         return;
 643
 644 ufs2_inode :
 645         UFSD(("Reading ufs2 inode, ino %lu\n", inode->i_ino))
 646
 647         ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino));
 648
 649         /*
 650          * Copy data to the in-core inode.
 651          */
 652         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 653         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
 654         if (inode->i_nlink == 0)
 655                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 656
 657         /*
 658          * Linux now has 32-bit uid and gid, so we can support EFT.
 659          */
 660         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 661         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 662
 663         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 664         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec);
 665         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec);
 666         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec);
 667         inode->i_mtime.tv_nsec = 0;
 668         inode->i_atime.tv_nsec = 0;
 669         inode->i_ctime.tv_nsec = 0;
 670         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 671         inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/
 672
 673         inode->i_version++;
 674         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 675         ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 676         /*
 677         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 678         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 679         */
 680         ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift;
 681
 682         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 683                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 684                         ufsi->i_u1.u2_i_data[i] =
 685                                 ufs2_inode->ui_u2.ui_addr.ui_db[i];
 686         }
 687         else {
 688                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 689                         ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
 690         }
 691         ufsi->i_osync = 0;
 692
 693         if (S_ISREG(inode->i_mode)) {
 694                 inode->i_op = &ufs_file_inode_operations;
 695                 inode->i_fop = &ufs_file_operations;
 696                 inode->i_mapping->a_ops = &ufs_aops;
 697         } else if (S_ISDIR(inode->i_mode)) {
 698                 inode->i_op = &ufs_dir_inode_operations;
 699                 inode->i_fop = &ufs_dir_operations;
 700         } else if (S_ISLNK(inode->i_mode)) {
 701                 if (!inode->i_blocks)
 702                         inode->i_op = &ufs_fast_symlink_inode_operations;
 703                 else {
 704                         inode->i_op = &page_symlink_inode_operations;
 705                         inode->i_mapping->a_ops = &ufs_aops;
 706                 }
 707         } else   /* TODO  : here ...*/
 708                 init_special_inode(inode, inode->i_mode,
 709                         ufs_get_inode_dev(sb, ufsi));
 710
 711         brelse(bh);
 712
 713         UFSD(("EXIT\n"))
 714         return;
 715 }
 716
 717 static int ufs_update_inode(struct inode * inode, int do_sync)
 718 {
 719         struct ufs_inode_info *ufsi = UFS_I(inode);
 720         struct super_block * sb;
 721         struct ufs_sb_private_info * uspi;
 722         struct buffer_head * bh;
 723         struct ufs_inode * ufs_inode;
 724         unsigned i;
 725         unsigned flags;
 726
 727         UFSD(("ENTER, ino %lu\n", inode->i_ino))
 728
 729         sb = inode->i_sb;
 730         uspi = UFS_SB(sb)->s_uspi;
 731         flags = UFS_SB(sb)->s_flags;
 732
 733         if (inode->i_ino < UFS_ROOTINO ||
 734             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 735                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 736                 return -1;
 737         }
 738
 739         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 740         if (!bh) {
 741                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 742                 return -1;
 743         }
 744         ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode));
 745
 746         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 747         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 748
 749         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 750         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 751
 752         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 753         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 754         ufs_inode->ui_atime.tv_usec = 0;
 755         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 756         ufs_inode->ui_ctime.tv_usec = 0;
 757         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 758         ufs_inode->ui_mtime.tv_usec = 0;
 759         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 760         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 761         ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen);
 762
 763         if ((flags & UFS_UID_MASK) == UFS_UID_EFT) {
 764                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 765                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 766         }
 767
 768         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 769                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 770                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 771         } else if (inode->i_blocks) {
 772                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 773                         ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
 774         }
 775         else {
 776                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 777                         ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
 778         }
 779
 780         if (!inode->i_nlink)
 781                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
 782
 783         mark_buffer_dirty(bh);
 784         if (do_sync)
 785                 sync_dirty_buffer(bh);
 786         brelse (bh);
 787
 788         UFSD(("EXIT\n"))
 789         return 0;
 790 }
 791
 792 int ufs_write_inode (struct inode * inode, int wait)
 793 {
 794         int ret;
 795         lock_kernel();
 796         ret = ufs_update_inode (inode, wait);
 797         unlock_kernel();
 798         return ret;
 799 }
 800
 801 int ufs_sync_inode (struct inode *inode)
 802 {
 803         return ufs_update_inode (inode, 1);
 804 }
 805
 806 void ufs_delete_inode (struct inode * inode)
 807 {
 808         truncate_inode_pages(&inode->i_data, 0);
 809         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 810         lock_kernel();
 811         mark_inode_dirty(inode);
 812         ufs_update_inode(inode, IS_SYNC(inode));
 813         inode->i_size = 0;
 814         if (inode->i_blocks)
 815                 ufs_truncate (inode);
 816         ufs_free_inode (inode);
 817         unlock_kernel();
 818 }