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/buffer_head.h>
  38 #include <linux/writeback.h>
  39
  40 #include "ufs_fs.h"
  41 #include "ufs.h"
  42 #include "swab.h"
  43 #include "util.h"
  44
  45 static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock);
  46
  47 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4])
  48 {
  49         struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi;
  50         int ptrs = uspi->s_apb;
  51         int ptrs_bits = uspi->s_apbshift;
  52         const long direct_blocks = UFS_NDADDR,
  53                 indirect_blocks = ptrs,
  54                 double_blocks = (1 << (ptrs_bits * 2));
  55         int n = 0;
  56
  57
  58         UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks);
  59         if (i_block < direct_blocks) {
  60                 offsets[n++] = i_block;
  61         } else if ((i_block -= direct_blocks) < indirect_blocks) {
  62                 offsets[n++] = UFS_IND_BLOCK;
  63                 offsets[n++] = i_block;
  64         } else if ((i_block -= indirect_blocks) < double_blocks) {
  65                 offsets[n++] = UFS_DIND_BLOCK;
  66                 offsets[n++] = i_block >> ptrs_bits;
  67                 offsets[n++] = i_block & (ptrs - 1);
  68         } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) {
  69                 offsets[n++] = UFS_TIND_BLOCK;
  70                 offsets[n++] = i_block >> (ptrs_bits * 2);
  71                 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1);
  72                 offsets[n++] = i_block & (ptrs - 1);
  73         } else {
  74                 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big");
  75         }
  76         return n;
  77 }
  78
  79 /*
  80  * Returns the location of the fragment from
  81  * the beginning of the filesystem.
  82  */
  83
  84 static u64 ufs_frag_map(struct inode *inode, sector_t frag, bool needs_lock)
  85 {
  86         struct ufs_inode_info *ufsi = UFS_I(inode);
  87         struct super_block *sb = inode->i_sb;
  88         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
  89         u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift;
  90         int shift = uspi->s_apbshift-uspi->s_fpbshift;
  91         sector_t offsets[4], *p;
  92         int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets);
  93         u64  ret = 0L;
  94         __fs32 block;
  95         __fs64 u2_block = 0L;
  96         unsigned flags = UFS_SB(sb)->s_flags;
  97         u64 temp = 0L;
  98
  99         UFSD(": frag = %llu  depth = %d\n", (unsigned long long)frag, depth);
 100         UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n",
 101                 uspi->s_fpbshift, uspi->s_apbmask,
 102                 (unsigned long long)mask);
 103
 104         if (depth == 0)
 105                 return 0;
 106
 107         p = offsets;
 108
 109         if (needs_lock)
 110                 lock_ufs(sb);
 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         if (needs_lock)
 156                 unlock_ufs(sb);
 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_block() - `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_info * sbi = UFS_SB(sb);
 420         struct ufs_sb_private_info * uspi = sbi->s_uspi;
 421         struct buffer_head * bh;
 422         int ret, err, new;
 423         unsigned long ptr,phys;
 424         u64 phys64 = 0;
 425         bool needs_lock = (sbi->mutex_owner != current);
 426
 427         if (!create) {
 428                 phys64 = ufs_frag_map(inode, fragment, needs_lock);
 429                 UFSD("phys64 = %llu\n", (unsigned long long)phys64);
 430                 if (phys64)
 431                         map_bh(bh_result, sb, phys64);
 432                 return 0;
 433         }
 434
 435         /* This code entered only while writing ....? */
 436
 437         err = -EIO;
 438         new = 0;
 439         ret = 0;
 440         bh = NULL;
 441
 442         if (needs_lock)
 443                 lock_ufs(sb);
 444
 445         UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
 446         if (fragment >
 447             ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb)
 448              << uspi->s_fpbshift))
 449                 goto abort_too_big;
 450
 451         err = 0;
 452         ptr = fragment;
 453
 454         /*
 455          * ok, these macros clean the logic up a bit and make
 456          * it much more readable:
 457          */
 458 #define GET_INODE_DATABLOCK(x) \
 459         ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\
 460                           bh_result->b_page)
 461 #define GET_INODE_PTR(x) \
 462         ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\
 463                           bh_result->b_page)
 464 #define GET_INDIRECT_DATABLOCK(x) \
 465         ufs_inode_getblock(inode, bh, x, fragment,      \
 466                           &err, &phys, &new, bh_result->b_page)
 467 #define GET_INDIRECT_PTR(x) \
 468         ufs_inode_getblock(inode, bh, x, fragment,      \
 469                           &err, NULL, NULL, NULL)
 470
 471         if (ptr < UFS_NDIR_FRAGMENT) {
 472                 bh = GET_INODE_DATABLOCK(ptr);
 473                 goto out;
 474         }
 475         ptr -= UFS_NDIR_FRAGMENT;
 476         if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) {
 477                 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift));
 478                 goto get_indirect;
 479         }
 480         ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
 481         if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) {
 482                 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift));
 483                 goto get_double;
 484         }
 485         ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
 486         bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift));
 487         bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask);
 488 get_double:
 489         bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask);
 490 get_indirect:
 491         bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask);
 492
 493 #undef GET_INODE_DATABLOCK
 494 #undef GET_INODE_PTR
 495 #undef GET_INDIRECT_DATABLOCK
 496 #undef GET_INDIRECT_PTR
 497
 498 out:
 499         if (err)
 500                 goto abort;
 501         if (new)
 502                 set_buffer_new(bh_result);
 503         map_bh(bh_result, sb, phys);
 504 abort:
 505         if (needs_lock)
 506                 unlock_ufs(sb);
 507
 508         return err;
 509
 510 abort_too_big:
 511         ufs_warning(sb, "ufs_get_block", "block > big");
 512         goto abort;
 513 }
 514
 515 static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 516 {
 517         return block_write_full_page(page,ufs_getfrag_block,wbc);
 518 }
 519
 520 static int ufs_readpage(struct file *file, struct page *page)
 521 {
 522         return block_read_full_page(page,ufs_getfrag_block);
 523 }
 524
 525 int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
 526 {
 527         return __block_write_begin(page, pos, len, ufs_getfrag_block);
 528 }
 529
 530 static int ufs_write_begin(struct file *file, struct address_space *mapping,
 531                         loff_t pos, unsigned len, unsigned flags,
 532                         struct page **pagep, void **fsdata)
 533 {
 534         int ret;
 535
 536         ret = block_write_begin(mapping, pos, len, flags, pagep,
 537                                 ufs_getfrag_block);
 538         if (unlikely(ret)) {
 539                 loff_t isize = mapping->host->i_size;
 540                 if (pos + len > isize)
 541                         vmtruncate(mapping->host, isize);
 542         }
 543
 544         return ret;
 545 }
 546
 547 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 548 {
 549         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 550 }
 551
 552 const struct address_space_operations ufs_aops = {
 553         .readpage = ufs_readpage,
 554         .writepage = ufs_writepage,
 555         .write_begin = ufs_write_begin,
 556         .write_end = generic_write_end,
 557         .bmap = ufs_bmap
 558 };
 559
 560 static void ufs_set_inode_ops(struct inode *inode)
 561 {
 562         if (S_ISREG(inode->i_mode)) {
 563                 inode->i_op = &ufs_file_inode_operations;
 564                 inode->i_fop = &ufs_file_operations;
 565                 inode->i_mapping->a_ops = &ufs_aops;
 566         } else if (S_ISDIR(inode->i_mode)) {
 567                 inode->i_op = &ufs_dir_inode_operations;
 568                 inode->i_fop = &ufs_dir_operations;
 569                 inode->i_mapping->a_ops = &ufs_aops;
 570         } else if (S_ISLNK(inode->i_mode)) {
 571                 if (!inode->i_blocks)
 572                         inode->i_op = &ufs_fast_symlink_inode_operations;
 573                 else {
 574                         inode->i_op = &ufs_symlink_inode_operations;
 575                         inode->i_mapping->a_ops = &ufs_aops;
 576                 }
 577         } else
 578                 init_special_inode(inode, inode->i_mode,
 579                                    ufs_get_inode_dev(inode->i_sb, UFS_I(inode)));
 580 }
 581
 582 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 583 {
 584         struct ufs_inode_info *ufsi = UFS_I(inode);
 585         struct super_block *sb = inode->i_sb;
 586         mode_t mode;
 587
 588         /*
 589          * Copy data to the in-core inode.
 590          */
 591         inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode);
 592         set_nlink(inode, fs16_to_cpu(sb, ufs_inode->ui_nlink));
 593         if (inode->i_nlink == 0) {
 594                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 595                 return -1;
 596         }
 597
 598         /*
 599          * Linux now has 32-bit uid and gid, so we can support EFT.
 600          */
 601         inode->i_uid = ufs_get_inode_uid(sb, ufs_inode);
 602         inode->i_gid = ufs_get_inode_gid(sb, ufs_inode);
 603
 604         inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size);
 605         inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec);
 606         inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec);
 607         inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec);
 608         inode->i_mtime.tv_nsec = 0;
 609         inode->i_atime.tv_nsec = 0;
 610         inode->i_ctime.tv_nsec = 0;
 611         inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks);
 612         inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen);
 613         ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags);
 614         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 615         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 616
 617
 618         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 619                 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr,
 620                        sizeof(ufs_inode->ui_u2.ui_addr));
 621         } else {
 622                 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink,
 623                        sizeof(ufs_inode->ui_u2.ui_symlink) - 1);
 624                 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0;
 625         }
 626         return 0;
 627 }
 628
 629 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode)
 630 {
 631         struct ufs_inode_info *ufsi = UFS_I(inode);
 632         struct super_block *sb = inode->i_sb;
 633         mode_t mode;
 634
 635         UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino);
 636         /*
 637          * Copy data to the in-core inode.
 638          */
 639         inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode);
 640         set_nlink(inode, fs16_to_cpu(sb, ufs2_inode->ui_nlink));
 641         if (inode->i_nlink == 0) {
 642                 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino);
 643                 return -1;
 644         }
 645
 646         /*
 647          * Linux now has 32-bit uid and gid, so we can support EFT.
 648          */
 649         inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid);
 650         inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid);
 651
 652         inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size);
 653         inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime);
 654         inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime);
 655         inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime);
 656         inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec);
 657         inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec);
 658         inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec);
 659         inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks);
 660         inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen);
 661         ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags);
 662         /*
 663         ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow);
 664         ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag);
 665         */
 666
 667         if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) {
 668                 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr,
 669                        sizeof(ufs2_inode->ui_u2.ui_addr));
 670         } else {
 671                 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink,
 672                        sizeof(ufs2_inode->ui_u2.ui_symlink) - 1);
 673                 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0;
 674         }
 675         return 0;
 676 }
 677
 678 struct inode *ufs_iget(struct super_block *sb, unsigned long ino)
 679 {
 680         struct ufs_inode_info *ufsi;
 681         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 682         struct buffer_head * bh;
 683         struct inode *inode;
 684         int err;
 685
 686         UFSD("ENTER, ino %lu\n", ino);
 687
 688         if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) {
 689                 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n",
 690                             ino);
 691                 return ERR_PTR(-EIO);
 692         }
 693
 694         inode = iget_locked(sb, ino);
 695         if (!inode)
 696                 return ERR_PTR(-ENOMEM);
 697         if (!(inode->i_state & I_NEW))
 698                 return inode;
 699
 700         ufsi = UFS_I(inode);
 701
 702         bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
 703         if (!bh) {
 704                 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n",
 705                             inode->i_ino);
 706                 goto bad_inode;
 707         }
 708         if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
 709                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 710
 711                 err = ufs2_read_inode(inode,
 712                                       ufs2_inode + ufs_inotofsbo(inode->i_ino));
 713         } else {
 714                 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data;
 715
 716                 err = ufs1_read_inode(inode,
 717                                       ufs_inode + ufs_inotofsbo(inode->i_ino));
 718         }
 719
 720         if (err)
 721                 goto bad_inode;
 722         inode->i_version++;
 723         ufsi->i_lastfrag =
 724                 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift;
 725         ufsi->i_dir_start_lookup = 0;
 726         ufsi->i_osync = 0;
 727
 728         ufs_set_inode_ops(inode);
 729
 730         brelse(bh);
 731
 732         UFSD("EXIT\n");
 733         unlock_new_inode(inode);
 734         return inode;
 735
 736 bad_inode:
 737         iget_failed(inode);
 738         return ERR_PTR(-EIO);
 739 }
 740
 741 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode)
 742 {
 743         struct super_block *sb = inode->i_sb;
 744         struct ufs_inode_info *ufsi = UFS_I(inode);
 745
 746         ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode);
 747         ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink);
 748
 749         ufs_set_inode_uid(sb, ufs_inode, inode->i_uid);
 750         ufs_set_inode_gid(sb, ufs_inode, inode->i_gid);
 751
 752         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 753         ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec);
 754         ufs_inode->ui_atime.tv_usec = 0;
 755         ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec);
 756         ufs_inode->ui_ctime.tv_usec = 0;
 757         ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec);
 758         ufs_inode->ui_mtime.tv_usec = 0;
 759         ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks);
 760         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 761         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 762
 763         if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) {
 764                 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow);
 765                 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag);
 766         }
 767
 768         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 769                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 770                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0];
 771         } else if (inode->i_blocks) {
 772                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data,
 773                        sizeof(ufs_inode->ui_u2.ui_addr));
 774         }
 775         else {
 776                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 777                        sizeof(ufs_inode->ui_u2.ui_symlink));
 778         }
 779
 780         if (!inode->i_nlink)
 781                 memset (ufs_inode, 0, sizeof(struct ufs_inode));
 782 }
 783
 784 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode)
 785 {
 786         struct super_block *sb = inode->i_sb;
 787         struct ufs_inode_info *ufsi = UFS_I(inode);
 788
 789         UFSD("ENTER\n");
 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_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid);
 794         ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid);
 795
 796         ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size);
 797         ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec);
 798         ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec);
 799         ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec);
 800         ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec);
 801         ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec);
 802         ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec);
 803
 804         ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks);
 805         ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags);
 806         ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation);
 807
 808         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 809                 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */
 810                 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0];
 811         } else if (inode->i_blocks) {
 812                 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data,
 813                        sizeof(ufs_inode->ui_u2.ui_addr));
 814         } else {
 815                 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink,
 816                        sizeof(ufs_inode->ui_u2.ui_symlink));
 817         }
 818
 819         if (!inode->i_nlink)
 820                 memset (ufs_inode, 0, sizeof(struct ufs2_inode));
 821         UFSD("EXIT\n");
 822 }
 823
 824 static int ufs_update_inode(struct inode * inode, int do_sync)
 825 {
 826         struct super_block *sb = inode->i_sb;
 827         struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
 828         struct buffer_head * bh;
 829
 830         UFSD("ENTER, ino %lu\n", inode->i_ino);
 831
 832         if (inode->i_ino < UFS_ROOTINO ||
 833             inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) {
 834                 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino);
 835                 return -1;
 836         }
 837
 838         bh = sb_bread(sb, ufs_inotofsba(inode->i_ino));
 839         if (!bh) {
 840                 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino);
 841                 return -1;
 842         }
 843         if (uspi->fs_magic == UFS2_MAGIC) {
 844                 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data;
 845
 846                 ufs2_update_inode(inode,
 847                                   ufs2_inode + ufs_inotofsbo(inode->i_ino));
 848         } else {
 849                 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data;
 850
 851                 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino));
 852         }
 853
 854         mark_buffer_dirty(bh);
 855         if (do_sync)
 856                 sync_dirty_buffer(bh);
 857         brelse (bh);
 858
 859         UFSD("EXIT\n");
 860         return 0;
 861 }
 862
 863 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc)
 864 {
 865         int ret;
 866         lock_ufs(inode->i_sb);
 867         ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
 868         unlock_ufs(inode->i_sb);
 869         return ret;
 870 }
 871
 872 int ufs_sync_inode (struct inode *inode)
 873 {
 874         return ufs_update_inode (inode, 1);
 875 }
 876
 877 void ufs_evict_inode(struct inode * inode)
 878 {
 879         int want_delete = 0;
 880
 881         if (!inode->i_nlink && !is_bad_inode(inode))
 882                 want_delete = 1;
 883
 884         truncate_inode_pages(&inode->i_data, 0);
 885         if (want_delete) {
 886                 loff_t old_i_size;
 887                 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/
 888                 lock_ufs(inode->i_sb);
 889                 mark_inode_dirty(inode);
 890                 ufs_update_inode(inode, IS_SYNC(inode));
 891                 old_i_size = inode->i_size;
 892                 inode->i_size = 0;
 893                 if (inode->i_blocks && ufs_truncate(inode, old_i_size))
 894                         ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n");
 895                 unlock_ufs(inode->i_sb);
 896         }
 897
 898         invalidate_inode_buffers(inode);
 899         end_writeback(inode);
 900
 901         if (want_delete) {
 902                 lock_ufs(inode->i_sb);
 903                 ufs_free_inode (inode);
 904                 unlock_ufs(inode->i_sb);
 905         }
 906 }