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/time.h>
  34 #include <linux/stat.h>
  35 #include <linux/string.h>
  36 #include <linux/mm.h>
  37 #include <linux/smp_lock.h>
  38 #include <linux/buffer_head.h>
  39 #include <linux/writeback.h>
  40 #include <linux/quotaops.h>
  41
  42 #include "ufs_fs.h"
  43 #include "ufs.h"
  44 #include "swab.h"
  45 #include "util.h"
  46
  47 static u64 ufs_frag_map(struct inode *inode, sector_t frag);
  48
  49 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
  50 {
  51         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
  52         int ptrs = uspi->s_apb;
  53         int ptrs_bits = uspi->s_apbshift;
  54         const long direct_blocks = UFS_NDADDR,
  55                 indirect_blocks = ptrs,
  56                 double_blocks = (1 << (ptrs_bits * 2));
  57         int n = 0;
  58
  59
  60         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
  61         if (i_block < direct_blocks) {
  62                 offsets[n++] = i_block;
  63         } else if ((i_block -= direct_blocks) < indirect_blocks) {
  64                 offsets[n++] = UFS_IND_BLOCK;
  65                 offsets[n++] = i_block;
  66         } else if ((i_block -= indirect_blocks) < double_blocks) {
  67                 offsets[n++] = UFS_DIND_BLOCK;
  68                 offsets[n++] = i_block >> ptrs_bits;
  69                 offsets[n++] = i_block & (ptrs - 1);
  70         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  71                 offsets[n++] = UFS_TIND_BLOCK;
  72                 offsets[n++] = i_block >> (ptrs_bits * 2);
  73                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  74                 offsets[n++] = i_block & (ptrs - 1);
  75         } else {
  76                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  77         }
  78         return n;
  79 }
  80
  81 /*
  82  * Returns the location of the fragment from
  83  * the begining of the filesystem.
  84  */
  85
  86 static u64 ufs_frag_map(struct inode *inode, sector_t frag)
  87 {
  88         struct ufs_inode_info *ufsi = UFS_I(inode);
  89         struct super_block *sb = inode->i_sb;
  90         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
  91         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
  92         int shift = uspi->s_apbshift-uspi->s_fpbshift;
  93         sector_t offsets[4], *p;
  94         int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
  95         u64  ret = 0L;
  96         __fs32 block;
  97         __fs64 u2_block = 0L;
  98         unsigned flags = UFS_SB(sb)->s_flags;
  99         u64 temp = 0L;
 100
 101         UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
 102         UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
 103                 uspi->s_fpbshift, uspi->s_apbmask,
 104                 (unsigned long long)mask);
 105
 106         if (depth == 0)
 107                 return 0;
 108
 109         p = offsets;
 110
 111         lock_kernel();
 112         if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 113                 goto ufs2;
 114
 115         block = ufsi->i_u1.i_data[*p++];
 116         if (!block)
 117                 goto out;
 118         while (--depth) {
 119                 struct buffer_head *bh;
 120                 sector_t n = *p++;
 121
 122                 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift));
 123                 if (!bh)
 124                         goto out;
 125                 block = ((__fs32 *) bh->b_data)[n & mask];
 126                 brelse (bh);
 127                 if (!block)
 128                         goto out;
 129         }
 130         ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask));
 131         goto out;
 132 ufs2:
 133         u2_block = ufsi->i_u1.u2_i_data[*p++];
 134         if (!u2_block)
 135                 goto out;
 136
 137
 138         while (--depth) {
 139                 struct buffer_head *bh;
 140                 sector_t n = *p++;
 141
 142
 143                 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block);
 144                 bh = sb_bread(sb, temp +(u64) (n>>shift));
 145                 if (!bh)
 146                         goto out;
 147                 u2_block = ((__fs64 *)bh->b_data)[n & mask];
 148                 brelse(bh);
 149                 if (!u2_block)
 150                         goto out;
 151         }
 152         temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block);
 153         ret = temp + (u64) (frag & uspi->s_fpbmask);
 154
 155 out:
 156         unlock_kernel();
 157         return ret;
 158 }
 159
 160 /**
 161  * ufs_inode_getfrag() - allocate new fragment(s)
 162  * @inode - pointer to inode
 163  * @fragment - number of `fragment' which hold pointer
 164  *   to new allocated fragment(s)
 165  * @new_fragment - number of new allocated fragment(s)
 166  * @required - how many fragment(s) we require
 167  * @err - we set it if something wrong
 168  * @phys - pointer to where we save physical number of new allocated fragments,
 169  *   NULL if we allocate not data(indirect blocks for example).
 170  * @new - we set it if we allocate new block
 171  * @locked_page - for ufs_new_fragments()
 172  */
 173 static struct buffer_head *
 174 ufs_inode_getfrag(struct inode *inode, u64 fragment,
 175                   sector_t new_fragment, unsigned int required, int *err,
 176                   long *phys, int *new, struct page *locked_page)
 177 {
 178         struct ufs_inode_info *ufsi = UFS_I(inode);
 179         struct super_block *sb = inode->i_sb;
 180         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 181         struct buffer_head * result;
 182         unsigned blockoff, lastblockoff;
 183         u64 tmp, goal, lastfrag, block, lastblock;
 184         void *p, *p2;
 185
 186         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, "
 187              "metadata %d\n", inode->i_ino, (unsigned long long)fragment,
 188              (unsigned long long)new_fragment, required, !phys);
 189
 190         /* TODO : to be done for write support
 191         if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
 192              goto ufs2;
 193          */
 194
 195         block = ufs_fragstoblks (fragment);
 196         blockoff = ufs_fragnum (fragment);
 197         p = ufs_get_direct_data_ptr(uspi, ufsi, block);
 198
 199         goal = 0;
 200
 201 repeat:
 202         tmp = ufs_data_ptr_to_cpu(sb, p);
 203
 204         lastfrag = ufsi->i_lastfrag;
 205         if (tmp && fragment < lastfrag) {
 206                 if (!phys) {
 207                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 208                         if (tmp == ufs_data_ptr_to_cpu(sb, p)) {
 209                                 UFSD("EXIT, result %llu\n",
 210                                      (unsigned long long)tmp + blockoff);
 211                                 return result;
 212                         }
 213                         brelse (result);
 214                         goto repeat;
 215                 } else {
 216                         *phys = uspi->s_sbbase + tmp + blockoff;
 217                         return NULL;
 218                 }
 219         }
 220
 221         lastblock = ufs_fragstoblks (lastfrag);
 222         lastblockoff = ufs_fragnum (lastfrag);
 223         /*
 224          * We will extend file into new block beyond last allocated block
 225          */
 226         if (lastblock < block) {
 227                 /*
 228                  * We must reallocate last allocated block
 229                  */
 230                 if (lastblockoff) {
 231                         p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock);
 232                         tmp = ufs_new_fragments(inode, p2, lastfrag,
 233                                                 ufs_data_ptr_to_cpu(sb, p2),
 234                                                 uspi->s_fpb - lastblockoff,
 235                                                 err, locked_page);
 236                         if (!tmp) {
 237                                 if (lastfrag != ufsi->i_lastfrag)
 238                                         goto repeat;
 239                                 else
 240                                         return NULL;
 241                         }
 242                         lastfrag = ufsi->i_lastfrag;
 243
 244                 }
 245                 tmp = ufs_data_ptr_to_cpu(sb,
 246                                          ufs_get_direct_data_ptr(uspi, ufsi,
 247                                                                  lastblock));
 248                 if (tmp)
 249                         goal = tmp + uspi->s_fpb;
 250                 tmp = ufs_new_fragments (inode, p, fragment - blockoff,
 251                                          goal, required + blockoff,
 252                                          err,
 253                                          phys != NULL ? locked_page : NULL);
 254         } else if (lastblock == block) {
 255         /*
 256          * We will extend last allocated block
 257          */
 258                 tmp = ufs_new_fragments(inode, p, fragment -
 259                                         (blockoff - lastblockoff),
 260                                         ufs_data_ptr_to_cpu(sb, p),
 261                                         required +  (blockoff - lastblockoff),
 262                                         err, phys != NULL ? locked_page : NULL);
 263         } else /* (lastblock > block) */ {
 264         /*
 265          * We will allocate new block before last allocated block
 266          */
 267                 if (block) {
 268                         tmp = ufs_data_ptr_to_cpu(sb,
 269                                                  ufs_get_direct_data_ptr(uspi, ufsi, block - 1));
 270                         if (tmp)
 271                                 goal = tmp + uspi->s_fpb;
 272                 }
 273                 tmp = ufs_new_fragments(inode, p, fragment - blockoff,
 274                                         goal, uspi->s_fpb, err,
 275                                         phys != NULL ? locked_page : NULL);
 276         }
 277         if (!tmp) {
 278                 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) ||
 279                     (blockoff && lastfrag != ufsi->i_lastfrag))
 280                         goto repeat;
 281                 *err = -ENOSPC;
 282                 return NULL;
 283         }
 284
 285         if (!phys) {
 286                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 287         } else {
 288                 *phys = uspi->s_sbbase + tmp + blockoff;
 289                 result = NULL;
 290                 *err = 0;
 291                 *new = 1;
 292         }
 293
 294         inode->i_ctime = CURRENT_TIME_SEC;
 295         if (IS_SYNC(inode))
 296                 ufs_sync_inode (inode);
 297         mark_inode_dirty(inode);
 298         UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff);
 299         return result;
 300
 301      /* This part : To be implemented ....
 302         Required only for writing, not required for READ-ONLY.
 303 ufs2:
 304
 305         u2_block = ufs_fragstoblks(fragment);
 306         u2_blockoff = ufs_fragnum(fragment);
 307         p = ufsi->i_u1.u2_i_data + block;
 308         goal = 0;
 309
 310 repeat2:
 311         tmp = fs32_to_cpu(sb, *p);
 312         lastfrag = ufsi->i_lastfrag;
 313
 314      */
 315 }
 316
 317 /**
 318  * ufs_inode_getblock() - allocate new block
 319  * @inode - pointer to inode
 320  * @bh - pointer to block which hold "pointer" to new allocated block
 321  * @fragment - number of `fragment' which hold pointer
 322  *   to new allocated block
 323  * @new_fragment - number of new allocated fragment
 324  *  (block will hold this fragment and also uspi->s_fpb-1)
 325  * @err - see ufs_inode_getfrag()
 326  * @phys - see ufs_inode_getfrag()
 327  * @new - see ufs_inode_getfrag()
 328  * @locked_page - see ufs_inode_getfrag()
 329  */
 330 static struct buffer_head *
 331 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
 332                   u64 fragment, sector_t new_fragment, int *err,
 333                   long *phys, int *new, struct page *locked_page)
 334 {
 335         struct super_block *sb = inode->i_sb;
 336         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 337         struct buffer_head * result;
 338         unsigned blockoff;
 339         u64 tmp, goal, block;
 340         void *p;
 341
 342         block = ufs_fragstoblks (fragment);
 343         blockoff = ufs_fragnum (fragment);
 344
 345         UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n",
 346              inode->i_ino, (unsigned long long)fragment,
 347              (unsigned long long)new_fragment, !phys);
 348
 349         result = NULL;
 350         if (!bh)
 351                 goto out;
 352         if (!buffer_uptodate(bh)) {
 353                 ll_rw_block (READ, 1, &bh);
 354                 wait_on_buffer (bh);
 355                 if (!buffer_uptodate(bh))
 356                         goto out;
 357         }
 358         if (uspi->fs_magic == UFS2_MAGIC)
 359                 p = (__fs64 *)bh->b_data + block;
 360         else
 361                 p = (__fs32 *)bh->b_data + block;
 362 repeat:
 363         tmp = ufs_data_ptr_to_cpu(sb, p);
 364         if (tmp) {
 365                 if (!phys) {
 366                         result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 367                         if (tmp == ufs_data_ptr_to_cpu(sb, p))
 368                                 goto out;
 369                         brelse (result);
 370                         goto repeat;
 371                 } else {
 372                         *phys = uspi->s_sbbase + tmp + blockoff;
 373                         goto out;
 374                 }
 375         }
 376
 377         if (block && (uspi->fs_magic == UFS2_MAGIC ?
 378                       (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) :
 379                       (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1]))))
 380                 goal = tmp + uspi->s_fpb;
 381         else
 382                 goal = bh->b_blocknr + uspi->s_fpb;
 383         tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal,
 384                                 uspi->s_fpb, err, locked_page);
 385         if (!tmp) {
 386                 if (ufs_data_ptr_to_cpu(sb, p))
 387                         goto repeat;
 388                 goto out;
 389         }
 390
 391
 392         if (!phys) {
 393                 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff);
 394         } else {
 395                 *phys = uspi->s_sbbase + tmp + blockoff;
 396                 *new = 1;
 397         }
 398
 399         mark_buffer_dirty(bh);
 400         if (IS_SYNC(inode))
 401                 sync_dirty_buffer(bh);
 402         inode->i_ctime = CURRENT_TIME_SEC;
 403         mark_inode_dirty(inode);
 404         UFSD("result %llu\n", (unsigned long long)tmp + blockoff);
 405 out:
 406         brelse (bh);
 407         UFSD("EXIT\n");
 408         return result;
 409 }
 410
 411 /**
 412  * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and
 413  * readpage, writepage and so on
 414  */
 415
 416 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
 417 {
 418         struct super_block * sb = inode->i_sb;
 419         struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi;
 420         struct buffer_head * bh;
 421         int ret, err, new;
 422         unsigned long ptr,phys;
 423         u64 phys64 = 0;
 424
 425         if (!create) {
 426                 phys64 = ufs_frag_map(inode, fragment);
 427                 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
 428                 if (phys64)
 429                         map_bh(bh_result, sb, phys64);
 430                 return 0;
 431         }
 432
 433         /* This code entered only while writing ....? */
 434
 435         err = -EIO;
 436         new = 0;
 437         ret = 0;
 438         bh = NULL;
 439
 440         lock_kernel();
 441
 442         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
 443         if (fragment >
 444             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 445              << uspi->s_fpbshift))
 446                 goto abort_too_big;
 447
 448         err = 0;
 449         ptr = fragment;
 450
 451         /*
 452          * ok, these macros clean the logic up a bit and make
 453          * it much more readable:
 454          */
 455 #define GET_INODE_DATABLOCK(x) \
 456         ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
 457                           bh_result->b_page)
 458 #define GET_INODE_PTR(x) \
 459         ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
 460                           bh_result->b_page)
 461 #define GET_INDIRECT_DATABLOCK(x) \
 462         ufs_inode_getblock(inode, bh, x, fragment,      \
 463                           &err, &phys, &new, bh_result->b_page)
 464 #define GET_INDIRECT_PTR(x) \
 465         ufs_inode_getblock(inode, bh, x, fragment,      \
 466                           &err, NULL, NULL, NULL)
 467
 468         if (ptr < UFS_NDIR_FRAGMENT) {
 469                 bh = GET_INODE_DATABLOCK(ptr);
 470                 goto out;
 471         }
 472         ptr -= UFS_NDIR_FRAGMENT;
 473         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 474                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 475                 goto get_indirect;
 476         }
 477         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 478         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 479                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 480                 goto get_double;
 481         }
 482         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 483         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 484         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 485 get_double:
 486         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 487 get_indirect:
 488         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 489
 490 #undef GET_INODE_DATABLOCK
 491 #undef GET_INODE_PTR
 492 #undef GET_INDIRECT_DATABLOCK
 493 #undef GET_INDIRECT_PTR
 494
 495 out:
 496         if (err)
 497                 goto abort;
 498         if (new)
 499                 set_buffer_new(bh_result);
 500         map_bh(bh_result, sb, phys);
 501 abort:
 502         unlock_kernel();
 503         return err;
 504
 505 abort_too_big:
 506         ufs_warning(sb, "ufs_get_block", "block > big");
 507         goto abort;
 508 }
 509
 510 static struct buffer_head *ufs_getfrag(struct inode *inode,
 511                                        unsigned int fragment,
 512                                        int create, int *err)
 513 {
 514         struct buffer_head dummy;
 515         int error;
 516
 517         dummy.b_state = 0;
 518         dummy.b_blocknr = -1000;
 519         error = ufs_getfrag_block(inode, fragment, &dummy, create);
 520         *err = error;
 521         if (!error && buffer_mapped(&dummy)) {
 522                 struct buffer_head *bh;
 523                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
 524                 if (buffer_new(&dummy)) {
 525                         memset(bh->b_data, 0, inode->i_sb->s_blocksize);
 526                         set_buffer_uptodate(bh);
 527                         mark_buffer_dirty(bh);
 528                 }
 529                 return bh;
 530         }
 531         return NULL;
 532 }
 533
 534 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment,
 535         int create, int * err)
 536 {
 537         struct buffer_head * bh;
 538
 539         UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment);
 540         bh = ufs_getfrag (inode, fragment, create, err);
 541         if (!bh || buffer_uptodate(bh))
 542                 return bh;
 543         ll_rw_block (READ, 1, &bh);
 544         wait_on_buffer (bh);
 545         if (buffer_uptodate(bh))
 546                 return bh;
 547         brelse (bh);
 548         *err = -EIO;
 549         return NULL;
 550 }
 551
 552 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 553 {
 554         return block_write_full_page(page,ufs_getfrag_block,wbc);
 555 }
 556
 557 static int ufs_readpage(struct file *file, struct page *page)
 558 {
 559         return block_read_full_page(page,ufs_getfrag_block);
 560 }
 561
 562 int __ufs_write_begin(struct file *file, struct address_space *mapping,
 563                         loff_t pos, unsigned len, unsigned flags,
 564                         struct page **pagep, void **fsdata)
 565 {
 566         return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 567                                 ufs_getfrag_block);
 568 }
 569
 570 static int ufs_write_begin(struct file *file, struct address_space *mapping,
 571                         loff_t pos, unsigned len, unsigned flags,
 572                         struct page **pagep, void **fsdata)
 573 {
 574         *pagep = NULL;
 575         return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
 576 }
 577
 578 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 579 {
 580         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 581 }
 582
 583 const struct address_space_operations ufs_aops = {
 584         .readpage = ufs_readpage,
 585         .writepage = ufs_writepage,
 586         .sync_page = block_sync_page,
 587         .write_begin = ufs_write_begin,
 588         .write_end = generic_write_end,
 589         .bmap = ufs_bmap
 590 };
 591
 592 static void ufs_set_inode_ops(struct inode *inode)
 593 {
 594         if (S_ISREG(inode->i_mode)) {
 595                 inode->i_op = &ufs_file_inode_operations;
 596                 inode->i_fop = &ufs_file_operations;
 597                 inode->i_mapping->a_ops = &ufs_aops;
 598         } else if (S_ISDIR(inode->i_mode)) {
 599                 inode->i_op = &ufs_dir_inode_operations;
 600                 inode->i_fop = &ufs_dir_operations;
 601                 inode->i_mapping->a_ops = &ufs_aops;
 602         } else if (S_ISLNK(inode->i_mode)) {
 603                 if (!inode->i_blocks)
 604                         inode->i_op = &ufs_fast_symlink_inode_operations;
 605                 else {
 606                         inode->i_op = &page_symlink_inode_operations;
 607                         inode->i_mapping->a_ops = &ufs_aops;
 608                 }
 609         } else
 610                 init_special_inode(inode, inode->i_mode,
 611                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
 612 }
 613
 614 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 615 {
 616         struct ufs_inode_info *ufsi = UFS_I(inode);
 617         struct super_block *sb = inode->i_sb;
 618         mode_t mode;
 619
 620         /*
 621          * Copy data to the in-core inode.
 622          */
 623         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 624         inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink);
 625         if (inode->i_nlink == 0) {
 626                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 627                 return -1;
 628         }
 629
 630         /*
 631          * Linux now has 32-bit uid and gid, so we can support EFT.
 632          */
 633         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 634         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 635
 636         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 637         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 638         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 639         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 640         inode->i_mtime.tv_nsec = 0;
 641         inode->i_atime.tv_nsec = 0;
 642         inode->i_ctime.tv_nsec = 0;
 643         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 644         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
 645         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 646         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 647         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 648
 649
 650         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 651                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
 652                        sizeof(ufs_inode->ui_u2.ui_addr));
 653         } else {
 654                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
 655                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
 656                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
 657         }
 658         return 0;
 659 }
 660
 661 static int 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
 667         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
 668         /*
 669          * Copy data to the in-core inode.
 670          */
 671         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 672         inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink);
 673         if (inode->i_nlink == 0) {
 674                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 675                 return -1;
 676         }
 677
 678         /*
 679          * Linux now has 32-bit uid and gid, so we can support EFT.
 680          */
 681         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 682         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 683
 684         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 685         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
 686         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
 687         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
 688         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
 689         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
 690         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
 691         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 692         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 693         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 694         /*
 695         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 696         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 697         */
 698
 699         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 700                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
 701                        sizeof(ufs2_inode->ui_u2.ui_addr));
 702         } else {
 703                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
 704                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
 705                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
 706         }
 707         return 0;
 708 }
 709
 710 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
 711 {
 712         struct ufs_inode_info *ufsi;
 713         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 714         struct buffer_head * bh;
 715         struct inode *inode;
 716         int err;
 717
 718         UFSD("ENTER, ino %lu\n", ino);
 719
 720         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
 721                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
 722                             ino);
 723                 return ERR_PTR(-EIO);
 724         }
 725
 726         inode = iget_locked(sb, ino);
 727         if (!inode)
 728                 return ERR_PTR(-ENOMEM);
 729         if (!(inode->i_state & I_NEW))
 730                 return inode;
 731
 732         ufsi = UFS_I(inode);
 733
 734         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 735         if (!bh) {
 736                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
 737                             inode->i_ino);
 738                 goto bad_inode;
 739         }
 740         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 741                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 742
 743                 err = ufs2_read_inode(inode,
 744                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
 745         } else {
 746                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
 747
 748                 err = ufs1_read_inode(inode,
 749                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
 750         }
 751
 752         if (err)
 753                 goto bad_inode;
 754         inode->i_version++;
 755         ufsi->i_lastfrag =
 756                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 757         ufsi->i_dir_start_lookup = 0;
 758         ufsi->i_osync = 0;
 759
 760         ufs_set_inode_ops(inode);
 761
 762         brelse(bh);
 763
 764         UFSD("EXIT\n");
 765         unlock_new_inode(inode);
 766         return inode;
 767
 768 bad_inode:
 769         iget_failed(inode);
 770         return ERR_PTR(-EIO);
 771 }
 772
 773 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 774 {
 775         struct super_block *sb = inode->i_sb;
 776         struct ufs_inode_info *ufsi = UFS_I(inode);
 777
 778         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 779         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 780
 781         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 782         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 783
 784         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 785         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 786         ufs_inode->ui_atime.tv_usec = 0;
 787         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 788         ufs_inode->ui_ctime.tv_usec = 0;
 789         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 790         ufs_inode->ui_mtime.tv_usec = 0;
 791         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 792         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 793         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 794
 795         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
 796                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 797                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 798         }
 799
 800         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 801                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 802                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 803         } else if (inode->i_blocks) {
 804                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
 805                        sizeof(ufs_inode->ui_u2.ui_addr));
 806         }
 807         else {
 808                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 809                        sizeof(ufs_inode->ui_u2.ui_symlink));
 810         }
 811
 812         if (!inode->i_nlink)
 813                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
 814 }
 815
 816 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
 817 {
 818         struct super_block *sb = inode->i_sb;
 819         struct ufs_inode_info *ufsi = UFS_I(inode);
 820
 821         UFSD("ENTER\n");
 822         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 823         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 824
 825         ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
 826         ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
 827
 828         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 829         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
 830         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
 831         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
 832         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
 833         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
 834         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
 835
 836         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
 837         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 838         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 839
 840         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 841                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 842                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
 843         } else if (inode->i_blocks) {
 844                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
 845                        sizeof(ufs_inode->ui_u2.ui_addr));
 846         } else {
 847                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 848                        sizeof(ufs_inode->ui_u2.ui_symlink));
 849         }
 850
 851         if (!inode->i_nlink)
 852                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
 853         UFSD("EXIT\n");
 854 }
 855
 856 static int ufs_update_inode(struct inode * inode, int do_sync)
 857 {
 858         struct super_block *sb = inode->i_sb;
 859         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 860         struct buffer_head * bh;
 861
 862         UFSD("ENTER, ino %lu\n", inode->i_ino);
 863
 864         if (inode->i_ino < UFS_ROOTINO ||
 865             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 866                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 867                 return -1;
 868         }
 869
 870         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 871         if (!bh) {
 872                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 873                 return -1;
 874         }
 875         if (uspi->fs_magic == UFS2_MAGIC) {
 876                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 877
 878                 ufs2_update_inode(inode,
 879                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
 880         } else {
 881                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
 882
 883                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
 884         }
 885
 886         mark_buffer_dirty(bh);
 887         if (do_sync)
 888                 sync_dirty_buffer(bh);
 889         brelse (bh);
 890
 891         UFSD("EXIT\n");
 892         return 0;
 893 }
 894
 895 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
 896 {
 897         int ret;
 898         lock_kernel();
 899         ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
 900         unlock_kernel();
 901         return ret;
 902 }
 903
 904 int ufs_sync_inode (struct inode *inode)
 905 {
 906         return ufs_update_inode (inode, 1);
 907 }
 908
 909 void ufs_delete_inode (struct inode * inode)
 910 {
 911         loff_t old_i_size;
 912
 913         if (!is_bad_inode(inode))
 914                 dquot_initialize(inode);
 915
 916         truncate_inode_pages(&inode->i_data, 0);
 917         if (is_bad_inode(inode))
 918                 goto no_delete;
 919         /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 920         lock_kernel();
 921         mark_inode_dirty(inode);
 922         ufs_update_inode(inode, IS_SYNC(inode));
 923         old_i_size = inode->i_size;
 924         inode->i_size = 0;
 925         if (inode->i_blocks && ufs_truncate(inode, old_i_size))
 926                 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
 927         ufs_free_inode (inode);
 928         unlock_kernel();
 929         return;
 930 no_delete:
 931         clear_inode(inode);     /* We must guarantee clearing of inode... */
 932 }