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