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