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, long i_block, int 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         if (i_block < 0) {
  64                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block < 0");
  65         } else if (i_block < direct_blocks) {
  66                 offsets[n++] = i_block;
  67         } else if ((i_block -= direct_blocks) < indirect_blocks) {
  68                 offsets[n++] = UFS_IND_BLOCK;
  69                 offsets[n++] = i_block;
  70         } else if ((i_block -= indirect_blocks) < double_blocks) {
  71                 offsets[n++] = UFS_DIND_BLOCK;
  72                 offsets[n++] = i_block >> ptrs_bits;
  73                 offsets[n++] = i_block & (ptrs - 1);
  74         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  75                 offsets[n++] = UFS_TIND_BLOCK;
  76                 offsets[n++] = i_block >> (ptrs_bits * 2);
  77                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  78                 offsets[n++] = i_block & (ptrs - 1);
  79         } else {
  80                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  81         }
  82         return n;
  83 }
  84
  85 /*
  86  * Returns the location of the fragment from
  87  * the begining of the filesystem.
  88  */
  89
  90 u64  ufs_frag_map(struct inode *inode, int frag)
  91 {
  92         struct ufs_inode_info *ufsi = UFS_I(inode);
  93         struct super_block *sb = inode->i_sb;
  94         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
  95         int mask = uspi->s_apbmask>>uspi->s_fpbshift;
  96         int shift = uspi->s_apbshift-uspi->s_fpbshift;
  97         int offsets[4], *p;
  98         int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
  99         int ret = 0;
 100         u32 block;
 101         u64 u2_block = 0;
 102         unsigned flags = UFS_SB(sb)->s_flags;
 103         u64 temp = 0;
 104
 105         if (depth == 0)
 106                 return 0;
 107
 108         p = offsets;
 109
 110         lock_kernel();
 111         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 112                 goto ufs2;
 113
 114         block = ufsi->i_u1.i_data[*p++];
 115         if (!block)
 116                 goto out;
 117         while (--depth) {
 118                 struct buffer_head *bh;
 119                 int n = *p++;
 120
 121                 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
 122                 if (!bh)
 123                         goto out;
 124                 block = ((u32*) bh->b_data)[n & mask];
 125                 brelse (bh);
 126                 if (!block)
 127                         goto out;
 128         }
 129         ret = uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask);
 130         goto out;
 131 ufs2:
 132         u2_block = ufsi->i_u1.u2_i_data[*p++];
 133         if (!u2_block)
 134                 goto out;
 135
 136         temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
 137
 138         while (--depth) {
 139                 struct buffer_head *bh;
 140                 u64 n = *p++;
 141
 142                 bh = sb_bread(sb, temp +(n>>shift));
 143                 if (!bh)
 144                         goto out;
 145                 u2_block = ((u64*)bh->b_data)[n & mask];
 146                 brelse(bh);
 147                 if (!u2_block)
 148                         goto out;
 149         }
 150         ret = temp + (frag & uspi->s_fpbmask);
 151
 152 out:
 153         unlock_kernel();
 154         return ret;
 155 }
 156
 157 static struct buffer_head * ufs_inode_getfrag (struct inode *inode,
 158         unsigned int fragment, unsigned int new_fragment,
 159         unsigned int required, int *err, int metadata, long *phys, int *new)
 160 {
 161         struct ufs_inode_info *ufsi = UFS_I(inode);
 162         struct super_block * sb;
 163         struct ufs_sb_private_info * uspi;
 164         struct buffer_head * result;
 165         unsigned block, blockoff, lastfrag, lastblock, lastblockoff;
 166         unsigned tmp, goal;
 167         u32 * p, * p2;
 168         unsigned flags = 0;
 169
 170         UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u, required %u\n",
 171                 inode->i_ino, fragment, new_fragment, required))
 172
 173         sb = inode->i_sb;
 174         uspi = UFS_SB(sb)->s_uspi;
 175
 176         flags = UFS_SB(sb)->s_flags;
 177         /* TODO : to be done for write support
 178         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 179              goto ufs2;
 180          */
 181
 182         block = ufs_fragstoblks (fragment);
 183         blockoff = ufs_fragnum (fragment);
 184         p = ufsi->i_u1.i_data + block;
 185         goal = 0;
 186
 187 repeat:
 188         tmp = fs32_to_cpu(sb, *p);
 189         lastfrag = ufsi->i_lastfrag;
 190         if (tmp && fragment < lastfrag) {
 191                 if (metadata) {
 192                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 193                         if (tmp == fs32_to_cpu(sb, *p)) {
 194                                 UFSD(("EXIT, result %u\n", tmp + blockoff))
 195                                 return result;
 196                         }
 197                         brelse (result);
 198                         goto repeat;
 199                 } else {
 200                         *phys = tmp;
 201                         return NULL;
 202                 }
 203         }
 204
 205         lastblock = ufs_fragstoblks (lastfrag);
 206         lastblockoff = ufs_fragnum (lastfrag);
 207         /*
 208          * We will extend file into new block beyond last allocated block
 209          */
 210         if (lastblock < block) {
 211                 /*
 212                  * We must reallocate last allocated block
 213                  */
 214                 if (lastblockoff) {
 215                         p2 = ufsi->i_u1.i_data + lastblock;
 216                         tmp = ufs_new_fragments (inode, p2, lastfrag,
 217                                 fs32_to_cpu(sb, *p2), uspi->s_fpb - lastblockoff, err);
 218                         if (!tmp) {
 219                                 if (lastfrag != ufsi->i_lastfrag)
 220                                         goto repeat;
 221                                 else
 222                                         return NULL;
 223                         }
 224                         lastfrag = ufsi->i_lastfrag;
 225
 226                 }
 227                 goal = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock]) + uspi->s_fpb;
 228                 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
 229                         goal, required + blockoff, err);
 230         }
 231         /*
 232          * We will extend last allocated block
 233          */
 234         else if (lastblock == block) {
 235                 tmp = ufs_new_fragments (inode, p, fragment - (blockoff - lastblockoff),
 236                         fs32_to_cpu(sb, *p), required +  (blockoff - lastblockoff), err);
 237         }
 238         /*
 239          * We will allocate new block before last allocated block
 240          */
 241         else /* (lastblock > block) */ {
 242                 if (lastblock && (tmp = fs32_to_cpu(sb, ufsi->i_u1.i_data[lastblock-1])))
 243                         goal = tmp + uspi->s_fpb;
 244                 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
 245                         goal, uspi->s_fpb, err);
 246         }
 247         if (!tmp) {
 248                 if ((!blockoff && *p) ||
 249                     (blockoff && lastfrag != ufsi->i_lastfrag))
 250                         goto repeat;
 251                 *err = -ENOSPC;
 252                 return NULL;
 253         }
 254
 255         /* The nullification of framgents done in ufs/balloc.c is
 256          * something I don't have the stomache to move into here right
 257          * now. -DaveM
 258          */
 259         if (metadata) {
 260                 result = sb_getblk(inode->i_sb, tmp + blockoff);
 261         } else {
 262                 *phys = tmp;
 263                 result = NULL;
 264                 *err = 0;
 265                 *new = 1;
 266         }
 267
 268         inode->i_ctime = CURRENT_TIME;
 269         if (IS_SYNC(inode))
 270                 ufs_sync_inode (inode);
 271         mark_inode_dirty(inode);
 272         UFSD(("EXIT, result %u\n", tmp + blockoff))
 273         return result;
 274
 275      /* This part : To be implemented ....
 276         Required only for writing, not required for READ-ONLY.
 277 ufs2:
 278
 279         u2_block = ufs_fragstoblks(fragment);
 280         u2_blockoff = ufs_fragnum(fragment);
 281         p = ufsi->i_u1.u2_i_data + block;
 282         goal = 0;
 283
 284 repeat2:
 285         tmp = fs32_to_cpu(sb, *p);
 286         lastfrag = ufsi->i_lastfrag;
 287
 288      */
 289 }
 290
 291 static struct buffer_head * ufs_block_getfrag (struct inode *inode,
 292         struct buffer_head *bh, unsigned int fragment, unsigned int new_fragment,
 293         unsigned int blocksize, int * err, int metadata, long *phys, int *new)
 294 {
 295         struct super_block * sb;
 296         struct ufs_sb_private_info * uspi;
 297         struct buffer_head * result;
 298         unsigned tmp, goal, block, blockoff;
 299         u32 * p;
 300
 301         sb = inode->i_sb;
 302         uspi = UFS_SB(sb)->s_uspi;
 303         block = ufs_fragstoblks (fragment);
 304         blockoff = ufs_fragnum (fragment);
 305
 306         UFSD(("ENTER, ino %lu, fragment %u, new_fragment %u\n", inode->i_ino, fragment, new_fragment))
 307
 308         result = NULL;
 309         if (!bh)
 310                 goto out;
 311         if (!buffer_uptodate(bh)) {
 312                 ll_rw_block (READ, 1, &bh);
 313                 wait_on_buffer (bh);
 314                 if (!buffer_uptodate(bh))
 315                         goto out;
 316         }
 317
 318         p = (u32 *) bh->b_data + block;
 319 repeat:
 320         tmp = fs32_to_cpu(sb, *p);
 321         if (tmp) {
 322                 if (metadata) {
 323                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 324                         if (tmp == fs32_to_cpu(sb, *p))
 325                                 goto out;
 326                         brelse (result);
 327                         goto repeat;
 328                 } else {
 329                         *phys = tmp;
 330                         goto out;
 331                 }
 332         }
 333
 334         if (block && (tmp = fs32_to_cpu(sb, ((u32*)bh->b_data)[block-1]) + uspi->s_fpb))
 335                 goal = tmp + uspi->s_fpb;
 336         else
 337                 goal = bh->b_blocknr + uspi->s_fpb;
 338         tmp = ufs_new_fragments (inode, p, ufs_blknum(new_fragment), goal, uspi->s_fpb, err);
 339         if (!tmp) {
 340                 if (fs32_to_cpu(sb, *p))
 341                         goto repeat;
 342                 goto out;
 343         }
 344
 345         /* The nullification of framgents done in ufs/balloc.c is
 346          * something I don't have the stomache to move into here right
 347          * now. -DaveM
 348          */
 349         if (metadata) {
 350                 result = sb_getblk(sb, tmp + blockoff);
 351         } else {
 352                 *phys = tmp;
 353                 *new = 1;
 354         }
 355
 356         mark_buffer_dirty(bh);
 357         if (IS_SYNC(inode))
 358                 sync_dirty_buffer(bh);
 359         inode->i_ctime = CURRENT_TIME;
 360         mark_inode_dirty(inode);
 361 out:
 362         brelse (bh);
 363         UFSD(("EXIT, result %u\n", tmp + blockoff))
 364         return result;
 365 }
 366
 367 /*
 368  * This function gets the block which contains the fragment.
 369  */
 370
 371 static int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 372 {
 373         struct super_block * sb = inode->i_sb;
 374         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
 375         struct buffer_head * bh;
 376         int ret, err, new;
 377         unsigned long ptr,phys;
 378         u64 phys64 = 0;
 379
 380         if (!create) {
 381                 phys64 = ufs_frag_map(inode, fragment);
 382                 if (phys64)
 383                         map_bh(bh_result, sb, phys64);
 384                 return 0;
 385         }
 386
 387         /* This code entered only while writing ....? */
 388
 389         err = -EIO;
 390         new = 0;
 391         ret = 0;
 392         bh = NULL;
 393
 394         lock_kernel();
 395
 396         UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment))
 397         if (fragment < 0)
 398                 goto abort_negative;
 399         if (fragment >
 400             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 401              << uspi->s_fpbshift))
 402                 goto abort_too_big;
 403
 404         err = 0;
 405         ptr = fragment;
 406
 407         /*
 408          * ok, these macros clean the logic up a bit and make
 409          * it much more readable:
 410          */
 411 #define GET_INODE_DATABLOCK(x) \
 412                 ufs_inode_getfrag(inode, x, fragment, 1, &err, 0, &phys, &new)
 413 #define GET_INODE_PTR(x) \
 414                 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, 1, NULL, NULL)
 415 #define GET_INDIRECT_DATABLOCK(x) \
 416                 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
 417                                   &err, 0, &phys, &new);
 418 #define GET_INDIRECT_PTR(x) \
 419                 ufs_block_getfrag(inode, bh, x, fragment, sb->s_blocksize, \
 420                                   &err, 1, NULL, NULL);
 421
 422         if (ptr < UFS_NDIR_FRAGMENT) {
 423                 bh = GET_INODE_DATABLOCK(ptr);
 424                 goto out;
 425         }
 426         ptr -= UFS_NDIR_FRAGMENT;
 427         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 428                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 429                 goto get_indirect;
 430         }
 431         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 432         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 433                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 434                 goto get_double;
 435         }
 436         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 437         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 438         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 439 get_double:
 440         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 441 get_indirect:
 442         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 443
 444 #undef GET_INODE_DATABLOCK
 445 #undef GET_INODE_PTR
 446 #undef GET_INDIRECT_DATABLOCK
 447 #undef GET_INDIRECT_PTR
 448
 449 out:
 450         if (err)
 451                 goto abort;
 452         if (new)
 453                 set_buffer_new(bh_result);
 454         map_bh(bh_result, sb, phys);
 455 abort:
 456         unlock_kernel();
 457         return err;
 458
 459 abort_negative:
 460         ufs_warning(sb, "ufs_get_block", "block < 0");
 461         goto abort;
 462
 463 abort_too_big:
 464         ufs_warning(sb, "ufs_get_block", "block > big");
 465         goto abort;
 466 }
 467
 468 struct buffer_head *ufs_getfrag(struct inode *inode, unsigned int fragment,
 469                                 int create, int *err)
 470 {
 471         struct buffer_head dummy;
 472         int error;
 473
 474         dummy.b_state = 0;
 475         dummy.b_blocknr = -1000;
 476         error = ufs_getfrag_block(inode, fragment, &dummy, create);
 477         *err = error;
 478         if (!error && buffer_mapped(&dummy)) {
 479                 struct buffer_head *bh;
 480                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
 481                 if (buffer_new(&dummy)) {
 482                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
 483                         set_buffer_uptodate(bh);
 484                         mark_buffer_dirty(bh);
 485                 }
 486                 return bh;
 487         }
 488         return NULL;
 489 }
 490
 491 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
 492         int create, int * err)
 493 {
 494         struct buffer_head * bh;
 495
 496         UFSD(("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment))
 497         bh = ufs_getfrag (inode, fragment, create, err);
 498         if (!bh || buffer_uptodate(bh))
 499                 return bh;
 500         ll_rw_block (READ, 1, &bh);
 501         wait_on_buffer (bh);
 502         if (buffer_uptodate(bh))
 503                 return bh;
 504         brelse (bh);
 505         *err = -EIO;
 506         return NULL;
 507 }
 508
 509 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 510 {
 511         return block_write_full_page(page,ufs_getfrag_block,wbc);
 512 }
 513 static int ufs_readpage(struct file *file, struct page *page)
 514 {
 515         return block_read_full_page(page,ufs_getfrag_block);
 516 }
 517 static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
 518 {
 519         return block_prepare_write(page,from,to,ufs_getfrag_block);
 520 }
 521 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 522 {
 523         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 524 }
 525 struct address_space_operations ufs_aops = {
 526         .readpage = ufs_readpage,
 527         .writepage = ufs_writepage,
 528         .sync_page = block_sync_page,
 529         .prepare_write = ufs_prepare_write,
 530         .commit_write = generic_commit_write,
 531         .bmap = ufs_bmap
 532 };
 533
 534 void ufs_read_inode (struct inode * inode)
 535 {
 536         struct ufs_inode_info *ufsi = UFS_I(inode);
 537         struct super_block * sb;
 538         struct ufs_sb_private_info * uspi;
 539         struct ufs_inode * ufs_inode;
 540         struct ufs2_inode *ufs2_inode;
 541         struct buffer_head * bh;
 542         mode_t mode;
 543         unsigned i;
 544         unsigned flags;
 545
 546         UFSD(("ENTER, ino %lu\n", inode->i_ino))
 547
 548         sb = inode->i_sb;
 549         uspi = UFS_SB(sb)->s_uspi;
 550         flags = UFS_SB(sb)->s_flags;
 551
 552         if (inode->i_ino < UFS_ROOTINO ||
 553             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 554                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 555                 goto bad_inode;
 556         }
 557
 558         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 559         if (!bh) {
 560                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 561                 goto bad_inode;
 562         }
 563         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 564                 goto ufs2_inode;
 565
 566         ufs_inode = (struct ufs_inode *) (bh->b_data + sizeof(struct ufs_inode) * ufs_inotofsbo(inode->i_ino));
 567
 568         /*
 569          * Copy data to the in-core inode.
 570          */
 571         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 572         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
 573         if (inode->i_nlink == 0)
 574                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 575
 576         /*
 577          * Linux now has 32-bit uid and gid, so we can support EFT.
 578          */
 579         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 580         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 581
 582         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 583         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 584         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 585         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 586         inode->i_mtime.tv_nsec = 0;
 587         inode->i_atime.tv_nsec = 0;
 588         inode->i_ctime.tv_nsec = 0;
 589         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 590         inode->i_blksize = PAGE_SIZE;   /* This is the optimal IO size (for stat) */
 591         inode->i_version++;
 592         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 593         ufsi->i_gen = fs32_to_cpu(sb, ufs_inode->ui_gen);
 594         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 595         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 596         ufsi->i_lastfrag = (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 597
 598         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 599                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 600                         ufsi->i_u1.i_data[i] = ufs_inode->ui_u2.ui_addr.ui_db[i];
 601         }
 602         else {
 603                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 604                         ufsi->i_u1.i_symlink[i] = ufs_inode->ui_u2.ui_symlink[i];
 605         }
 606         ufsi->i_osync = 0;
 607
 608         if (S_ISREG(inode->i_mode)) {
 609                 inode->i_op = &ufs_file_inode_operations;
 610                 inode->i_fop = &ufs_file_operations;
 611                 inode->i_mapping->a_ops = &ufs_aops;
 612         } else if (S_ISDIR(inode->i_mode)) {
 613                 inode->i_op = &ufs_dir_inode_operations;
 614                 inode->i_fop = &ufs_dir_operations;
 615         } else if (S_ISLNK(inode->i_mode)) {
 616                 if (!inode->i_blocks)
 617                         inode->i_op = &ufs_fast_symlink_inode_operations;
 618                 else {
 619                         inode->i_op = &page_symlink_inode_operations;
 620                         inode->i_mapping->a_ops = &ufs_aops;
 621                 }
 622         } else
 623                 init_special_inode(inode, inode->i_mode,
 624                         old_decode_dev(fs32_to_cpu(sb, ufsi->i_u1.i_data[0])));
 625
 626         brelse (bh);
 627
 628         UFSD(("EXIT\n"))
 629         return;
 630
 631 bad_inode:
 632         make_bad_inode(inode);
 633         return;
 634
 635 ufs2_inode :
 636         UFSD(("Reading ufs2 inode, ino %lu\n", inode->i_ino))
 637
 638         ufs2_inode = (struct ufs2_inode *)(bh->b_data + sizeof(struct ufs2_inode) * ufs_inotofsbo(inode->i_ino));
 639
 640         /*
 641          * Copy data to the in-core inode.
 642          */
 643         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 644         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
 645         if (inode->i_nlink == 0)
 646                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 647
 648         /*
 649          * Linux now has 32-bit uid and gid, so we can support EFT.
 650          */
 651         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 652         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 653
 654         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 655         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_atime.tv_sec);
 656         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_ctime.tv_sec);
 657         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs2_inode->ui_mtime.tv_sec);
 658         inode->i_mtime.tv_nsec = 0;
 659         inode->i_atime.tv_nsec = 0;
 660         inode->i_ctime.tv_nsec = 0;
 661         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 662         inode->i_blksize = PAGE_SIZE; /*This is the optimal IO size(for stat)*/
 663
 664         inode->i_version++;
 665         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 666         ufsi->i_gen = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 667         /*
 668         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 669         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 670         */
 671         ufsi->i_lastfrag= (inode->i_size + uspi->s_fsize- 1) >> uspi->s_fshift;
 672
 673         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 674                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 675                         ufsi->i_u1.u2_i_data[i] =
 676                                 ufs2_inode->ui_u2.ui_addr.ui_db[i];
 677         }
 678         else {
 679                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 680                         ufsi->i_u1.i_symlink[i] = ufs2_inode->ui_u2.ui_symlink[i];
 681         }
 682         ufsi->i_osync = 0;
 683
 684         if (S_ISREG(inode->i_mode)) {
 685                 inode->i_op = &ufs_file_inode_operations;
 686                 inode->i_fop = &ufs_file_operations;
 687                 inode->i_mapping->a_ops = &ufs_aops;
 688         } else if (S_ISDIR(inode->i_mode)) {
 689                 inode->i_op = &ufs_dir_inode_operations;
 690                 inode->i_fop = &ufs_dir_operations;
 691         } else if (S_ISLNK(inode->i_mode)) {
 692                 if (!inode->i_blocks)
 693                         inode->i_op = &ufs_fast_symlink_inode_operations;
 694                 else {
 695                         inode->i_op = &page_symlink_inode_operations;
 696                         inode->i_mapping->a_ops = &ufs_aops;
 697                 }
 698         } else   /* TODO  : here ...*/
 699                 init_special_inode(inode, inode->i_mode,
 700                         old_decode_dev(fs32_to_cpu(sb, ufsi->i_u1.i_data[0])));
 701
 702         brelse(bh);
 703
 704         UFSD(("EXIT\n"))
 705         return;
 706 }
 707
 708 static int ufs_update_inode(struct inode * inode, int do_sync)
 709 {
 710         struct ufs_inode_info *ufsi = UFS_I(inode);
 711         struct super_block * sb;
 712         struct ufs_sb_private_info * uspi;
 713         struct buffer_head * bh;
 714         struct ufs_inode * ufs_inode;
 715         unsigned i;
 716         unsigned flags;
 717
 718         UFSD(("ENTER, ino %lu\n", inode->i_ino))
 719
 720         sb = inode->i_sb;
 721         uspi = UFS_SB(sb)->s_uspi;
 722         flags = UFS_SB(sb)->s_flags;
 723
 724         if (inode->i_ino < UFS_ROOTINO ||
 725             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 726                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 727                 return -1;
 728         }
 729
 730         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 731         if (!bh) {
 732                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 733                 return -1;
 734         }
 735         ufs_inode = (struct ufs_inode *) (bh->b_data + ufs_inotofsbo(inode->i_ino) * sizeof(struct ufs_inode));
 736
 737         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 738         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 739
 740         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 741         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 742
 743         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 744         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 745         ufs_inode->ui_atime.tv_usec = 0;
 746         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 747         ufs_inode->ui_ctime.tv_usec = 0;
 748         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 749         ufs_inode->ui_mtime.tv_usec = 0;
 750         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 751         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 752         ufs_inode->ui_gen = cpu_to_fs32(sb, ufsi->i_gen);
 753
 754         if ((flags & UFS_UID_MASK) == UFS_UID_EFT) {
 755                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 756                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 757         }
 758
 759         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 760                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 761                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 762         } else if (inode->i_blocks) {
 763                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR); i++)
 764                         ufs_inode->ui_u2.ui_addr.ui_db[i] = ufsi->i_u1.i_data[i];
 765         }
 766         else {
 767                 for (i = 0; i < (UFS_NDADDR + UFS_NINDIR) * 4; i++)
 768                         ufs_inode->ui_u2.ui_symlink[i] = ufsi->i_u1.i_symlink[i];
 769         }
 770
 771         if (!inode->i_nlink)
 772                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
 773
 774         mark_buffer_dirty(bh);
 775         if (do_sync)
 776                 sync_dirty_buffer(bh);
 777         brelse (bh);
 778
 779         UFSD(("EXIT\n"))
 780         return 0;
 781 }
 782
 783 void ufs_write_inode (struct inode * inode, int wait)
 784 {
 785         lock_kernel();
 786         ufs_update_inode (inode, wait);
 787         unlock_kernel();
 788 }
 789
 790 int ufs_sync_inode (struct inode *inode)
 791 {
 792         return ufs_update_inode (inode, 1);
 793 }
 794
 795 void ufs_delete_inode (struct inode * inode)
 796 {
 797         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 798         lock_kernel();
 799         mark_inode_dirty(inode);
 800         ufs_update_inode(inode, IS_SYNC(inode));
 801         inode->i_size = 0;
 802         if (inode->i_blocks)
 803                 ufs_truncate (inode);
 804         ufs_free_inode (inode);
 805         unlock_kernel();
 806 }