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