fs/reiserfs/inode.c

   1 /*
   2  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
   3  */
   4
   5 #include <linux/time.h>
   6 #include <linux/fs.h>
   7 #include <linux/reiserfs_fs.h>
   8 #include <linux/reiserfs_acl.h>
   9 #include <linux/reiserfs_xattr.h>
  10 #include <linux/exportfs.h>
  11 #include <linux/smp_lock.h>
  12 #include <linux/pagemap.h>
  13 #include <linux/highmem.h>
  14 #include <asm/uaccess.h>
  15 #include <asm/unaligned.h>
  16 #include <linux/buffer_head.h>
  17 #include <linux/mpage.h>
  18 #include <linux/writeback.h>
  19 #include <linux/quotaops.h>
  20 #include <linux/swap.h>
  21
  22 int reiserfs_commit_write(struct file *f, struct page *page,
  23                           unsigned from, unsigned to);
  24 int reiserfs_prepare_write(struct file *f, struct page *page,
  25                            unsigned from, unsigned to);
  26
  27 void reiserfs_delete_inode(struct inode *inode)
  28 {
  29         /* We need blocks for transaction + (user+group) quota update (possibly delete) */
  30         int jbegin_count =
  31             JOURNAL_PER_BALANCE_CNT * 2 +
  32             2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb);
  33         struct reiserfs_transaction_handle th;
  34         int err;
  35
  36         truncate_inode_pages(&inode->i_data, 0);
  37
  38         reiserfs_write_lock(inode->i_sb);
  39
  40         /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
  41         if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {  /* also handles bad_inode case */
  42                 reiserfs_delete_xattrs(inode);
  43
  44                 if (journal_begin(&th, inode->i_sb, jbegin_count))
  45                         goto out;
  46                 reiserfs_update_inode_transaction(inode);
  47
  48                 reiserfs_discard_prealloc(&th, inode);
  49
  50                 err = reiserfs_delete_object(&th, inode);
  51
  52                 /* Do quota update inside a transaction for journaled quotas. We must do that
  53                  * after delete_object so that quota updates go into the same transaction as
  54                  * stat data deletion */
  55                 if (!err)
  56                         vfs_dq_free_inode(inode);
  57
  58                 if (journal_end(&th, inode->i_sb, jbegin_count))
  59                         goto out;
  60
  61                 /* check return value from reiserfs_delete_object after
  62                  * ending the transaction
  63                  */
  64                 if (err)
  65                     goto out;
  66
  67                 /* all items of file are deleted, so we can remove "save" link */
  68                 remove_save_link(inode, 0 /* not truncate */ ); /* we can't do anything
  69                                                                  * about an error here */
  70         } else {
  71                 /* no object items are in the tree */
  72                 ;
  73         }
  74       out:
  75         clear_inode(inode);     /* note this must go after the journal_end to prevent deadlock */
  76         inode->i_blocks = 0;
  77         reiserfs_write_unlock(inode->i_sb);
  78 }
  79
  80 static void _make_cpu_key(struct cpu_key *key, int version, __u32 dirid,
  81                           __u32 objectid, loff_t offset, int type, int length)
  82 {
  83         key->version = version;
  84
  85         key->on_disk_key.k_dir_id = dirid;
  86         key->on_disk_key.k_objectid = objectid;
  87         set_cpu_key_k_offset(key, offset);
  88         set_cpu_key_k_type(key, type);
  89         key->key_length = length;
  90 }
  91
  92 /* take base of inode_key (it comes from inode always) (dirid, objectid) and version from an inode, set
  93    offset and type of key */
  94 void make_cpu_key(struct cpu_key *key, struct inode *inode, loff_t offset,
  95                   int type, int length)
  96 {
  97         _make_cpu_key(key, get_inode_item_key_version(inode),
  98                       le32_to_cpu(INODE_PKEY(inode)->k_dir_id),
  99                       le32_to_cpu(INODE_PKEY(inode)->k_objectid), offset, type,
 100                       length);
 101 }
 102
 103 //
 104 // when key is 0, do not set version and short key
 105 //
 106 inline void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
 107                               int version,
 108                               loff_t offset, int type, int length,
 109                               int entry_count /*or ih_free_space */ )
 110 {
 111         if (key) {
 112                 ih->ih_key.k_dir_id = cpu_to_le32(key->on_disk_key.k_dir_id);
 113                 ih->ih_key.k_objectid =
 114                     cpu_to_le32(key->on_disk_key.k_objectid);
 115         }
 116         put_ih_version(ih, version);
 117         set_le_ih_k_offset(ih, offset);
 118         set_le_ih_k_type(ih, type);
 119         put_ih_item_len(ih, length);
 120         /*    set_ih_free_space (ih, 0); */
 121         // for directory items it is entry count, for directs and stat
 122         // datas - 0xffff, for indirects - 0
 123         put_ih_entry_count(ih, entry_count);
 124 }
 125
 126 //
 127 // FIXME: we might cache recently accessed indirect item
 128
 129 // Ugh.  Not too eager for that....
 130 //  I cut the code until such time as I see a convincing argument (benchmark).
 131 // I don't want a bloated inode struct..., and I don't like code complexity....
 132
 133 /* cutting the code is fine, since it really isn't in use yet and is easy
 134 ** to add back in.  But, Vladimir has a really good idea here.  Think
 135 ** about what happens for reading a file.  For each page,
 136 ** The VFS layer calls reiserfs_readpage, who searches the tree to find
 137 ** an indirect item.  This indirect item has X number of pointers, where
 138 ** X is a big number if we've done the block allocation right.  But,
 139 ** we only use one or two of these pointers during each call to readpage,
 140 ** needlessly researching again later on.
 141 **
 142 ** The size of the cache could be dynamic based on the size of the file.
 143 **
 144 ** I'd also like to see us cache the location the stat data item, since
 145 ** we are needlessly researching for that frequently.
 146 **
 147 ** --chris
 148 */
 149
 150 /* If this page has a file tail in it, and
 151 ** it was read in by get_block_create_0, the page data is valid,
 152 ** but tail is still sitting in a direct item, and we can't write to
 153 ** it.  So, look through this page, and check all the mapped buffers
 154 ** to make sure they have valid block numbers.  Any that don't need
 155 ** to be unmapped, so that block_prepare_write will correctly call
 156 ** reiserfs_get_block to convert the tail into an unformatted node
 157 */
 158 static inline void fix_tail_page_for_writing(struct page *page)
 159 {
 160         struct buffer_head *head, *next, *bh;
 161
 162         if (page && page_has_buffers(page)) {
 163                 head = page_buffers(page);
 164                 bh = head;
 165                 do {
 166                         next = bh->b_this_page;
 167                         if (buffer_mapped(bh) && bh->b_blocknr == 0) {
 168                                 reiserfs_unmap_buffer(bh);
 169                         }
 170                         bh = next;
 171                 } while (bh != head);
 172         }
 173 }
 174
 175 /* reiserfs_get_block does not need to allocate a block only if it has been
 176    done already or non-hole position has been found in the indirect item */
 177 static inline int allocation_needed(int retval, b_blocknr_t allocated,
 178                                     struct item_head *ih,
 179                                     __le32 * item, int pos_in_item)
 180 {
 181         if (allocated)
 182                 return 0;
 183         if (retval == POSITION_FOUND && is_indirect_le_ih(ih) &&
 184             get_block_num(item, pos_in_item))
 185                 return 0;
 186         return 1;
 187 }
 188
 189 static inline int indirect_item_found(int retval, struct item_head *ih)
 190 {
 191         return (retval == POSITION_FOUND) && is_indirect_le_ih(ih);
 192 }
 193
 194 static inline void set_block_dev_mapped(struct buffer_head *bh,
 195                                         b_blocknr_t block, struct inode *inode)
 196 {
 197         map_bh(bh, inode->i_sb, block);
 198 }
 199
 200 //
 201 // files which were created in the earlier version can not be longer,
 202 // than 2 gb
 203 //
 204 static int file_capable(struct inode *inode, sector_t block)
 205 {
 206         if (get_inode_item_key_version(inode) != KEY_FORMAT_3_5 ||      // it is new file.
 207             block < (1 << (31 - inode->i_sb->s_blocksize_bits)))        // old file, but 'block' is inside of 2gb
 208                 return 1;
 209
 210         return 0;
 211 }
 212
 213 static int restart_transaction(struct reiserfs_transaction_handle *th,
 214                                struct inode *inode, struct treepath *path)
 215 {
 216         struct super_block *s = th->t_super;
 217         int len = th->t_blocks_allocated;
 218         int err;
 219
 220         BUG_ON(!th->t_trans_id);
 221         BUG_ON(!th->t_refcount);
 222
 223         pathrelse(path);
 224
 225         /* we cannot restart while nested */
 226         if (th->t_refcount > 1) {
 227                 return 0;
 228         }
 229         reiserfs_update_sd(th, inode);
 230         err = journal_end(th, s, len);
 231         if (!err) {
 232                 err = journal_begin(th, s, JOURNAL_PER_BALANCE_CNT * 6);
 233                 if (!err)
 234                         reiserfs_update_inode_transaction(inode);
 235         }
 236         return err;
 237 }
 238
 239 // it is called by get_block when create == 0. Returns block number
 240 // for 'block'-th logical block of file. When it hits direct item it
 241 // returns 0 (being called from bmap) or read direct item into piece
 242 // of page (bh_result)
 243
 244 // Please improve the english/clarity in the comment above, as it is
 245 // hard to understand.
 246
 247 static int _get_block_create_0(struct inode *inode, sector_t block,
 248                                struct buffer_head *bh_result, int args)
 249 {
 250         INITIALIZE_PATH(path);
 251         struct cpu_key key;
 252         struct buffer_head *bh;
 253         struct item_head *ih, tmp_ih;
 254         int fs_gen;
 255         b_blocknr_t blocknr;
 256         char *p = NULL;
 257         int chars;
 258         int ret;
 259         int result;
 260         int done = 0;
 261         unsigned long offset;
 262
 263         // prepare the key to look for the 'block'-th block of file
 264         make_cpu_key(&key, inode,
 265                      (loff_t) block * inode->i_sb->s_blocksize + 1, TYPE_ANY,
 266                      3);
 267
 268       research:
 269         result = search_for_position_by_key(inode->i_sb, &key, &path);
 270         if (result != POSITION_FOUND) {
 271                 pathrelse(&path);
 272                 if (p)
 273                         kunmap(bh_result->b_page);
 274                 if (result == IO_ERROR)
 275                         return -EIO;
 276                 // We do not return -ENOENT if there is a hole but page is uptodate, because it means
 277                 // That there is some MMAPED data associated with it that is yet to be written to disk.
 278                 if ((args & GET_BLOCK_NO_HOLE)
 279                     && !PageUptodate(bh_result->b_page)) {
 280                         return -ENOENT;
 281                 }
 282                 return 0;
 283         }
 284         //
 285         bh = get_last_bh(&path);
 286         ih = get_ih(&path);
 287         if (is_indirect_le_ih(ih)) {
 288                 __le32 *ind_item = (__le32 *) B_I_PITEM(bh, ih);
 289
 290                 /* FIXME: here we could cache indirect item or part of it in
 291                    the inode to avoid search_by_key in case of subsequent
 292                    access to file */
 293                 blocknr = get_block_num(ind_item, path.pos_in_item);
 294                 ret = 0;
 295                 if (blocknr) {
 296                         map_bh(bh_result, inode->i_sb, blocknr);
 297                         if (path.pos_in_item ==
 298                             ((ih_item_len(ih) / UNFM_P_SIZE) - 1)) {
 299                                 set_buffer_boundary(bh_result);
 300                         }
 301                 } else
 302                         // We do not return -ENOENT if there is a hole but page is uptodate, because it means
 303                         // That there is some MMAPED data associated with it that is yet to  be written to disk.
 304                 if ((args & GET_BLOCK_NO_HOLE)
 305                             && !PageUptodate(bh_result->b_page)) {
 306                         ret = -ENOENT;
 307                 }
 308
 309                 pathrelse(&path);
 310                 if (p)
 311                         kunmap(bh_result->b_page);
 312                 return ret;
 313         }
 314         // requested data are in direct item(s)
 315         if (!(args & GET_BLOCK_READ_DIRECT)) {
 316                 // we are called by bmap. FIXME: we can not map block of file
 317                 // when it is stored in direct item(s)
 318                 pathrelse(&path);
 319                 if (p)
 320                         kunmap(bh_result->b_page);
 321                 return -ENOENT;
 322         }
 323
 324         /* if we've got a direct item, and the buffer or page was uptodate,
 325          ** we don't want to pull data off disk again.  skip to the
 326          ** end, where we map the buffer and return
 327          */
 328         if (buffer_uptodate(bh_result)) {
 329                 goto finished;
 330         } else
 331                 /*
 332                  ** grab_tail_page can trigger calls to reiserfs_get_block on up to date
 333                  ** pages without any buffers.  If the page is up to date, we don't want
 334                  ** read old data off disk.  Set the up to date bit on the buffer instead
 335                  ** and jump to the end
 336                  */
 337         if (!bh_result->b_page || PageUptodate(bh_result->b_page)) {
 338                 set_buffer_uptodate(bh_result);
 339                 goto finished;
 340         }
 341         // read file tail into part of page
 342         offset = (cpu_key_k_offset(&key) - 1) & (PAGE_CACHE_SIZE - 1);
 343         fs_gen = get_generation(inode->i_sb);
 344         copy_item_head(&tmp_ih, ih);
 345
 346         /* we only want to kmap if we are reading the tail into the page.
 347          ** this is not the common case, so we don't kmap until we are
 348          ** sure we need to.  But, this means the item might move if
 349          ** kmap schedules
 350          */
 351         if (!p) {
 352                 p = (char *)kmap(bh_result->b_page);
 353                 if (fs_changed(fs_gen, inode->i_sb)
 354                     && item_moved(&tmp_ih, &path)) {
 355                         goto research;
 356                 }
 357         }
 358         p += offset;
 359         memset(p, 0, inode->i_sb->s_blocksize);
 360         do {
 361                 if (!is_direct_le_ih(ih)) {
 362                         BUG();
 363                 }
 364                 /* make sure we don't read more bytes than actually exist in
 365                  ** the file.  This can happen in odd cases where i_size isn't
 366                  ** correct, and when direct item padding results in a few
 367                  ** extra bytes at the end of the direct item
 368                  */
 369                 if ((le_ih_k_offset(ih) + path.pos_in_item) > inode->i_size)
 370                         break;
 371                 if ((le_ih_k_offset(ih) - 1 + ih_item_len(ih)) > inode->i_size) {
 372                         chars =
 373                             inode->i_size - (le_ih_k_offset(ih) - 1) -
 374                             path.pos_in_item;
 375                         done = 1;
 376                 } else {
 377                         chars = ih_item_len(ih) - path.pos_in_item;
 378                 }
 379                 memcpy(p, B_I_PITEM(bh, ih) + path.pos_in_item, chars);
 380
 381                 if (done)
 382                         break;
 383
 384                 p += chars;
 385
 386                 if (PATH_LAST_POSITION(&path) != (B_NR_ITEMS(bh) - 1))
 387                         // we done, if read direct item is not the last item of
 388                         // node FIXME: we could try to check right delimiting key
 389                         // to see whether direct item continues in the right
 390                         // neighbor or rely on i_size
 391                         break;
 392
 393                 // update key to look for the next piece
 394                 set_cpu_key_k_offset(&key, cpu_key_k_offset(&key) + chars);
 395                 result = search_for_position_by_key(inode->i_sb, &key, &path);
 396                 if (result != POSITION_FOUND)
 397                         // i/o error most likely
 398                         break;
 399                 bh = get_last_bh(&path);
 400                 ih = get_ih(&path);
 401         } while (1);
 402
 403         flush_dcache_page(bh_result->b_page);
 404         kunmap(bh_result->b_page);
 405
 406       finished:
 407         pathrelse(&path);
 408
 409         if (result == IO_ERROR)
 410                 return -EIO;
 411
 412         /* this buffer has valid data, but isn't valid for io.  mapping it to
 413          * block #0 tells the rest of reiserfs it just has a tail in it
 414          */
 415         map_bh(bh_result, inode->i_sb, 0);
 416         set_buffer_uptodate(bh_result);
 417         return 0;
 418 }
 419
 420 // this is called to create file map. So, _get_block_create_0 will not
 421 // read direct item
 422 static int reiserfs_bmap(struct inode *inode, sector_t block,
 423                          struct buffer_head *bh_result, int create)
 424 {
 425         if (!file_capable(inode, block))
 426                 return -EFBIG;
 427
 428         reiserfs_write_lock(inode->i_sb);
 429         /* do not read the direct item */
 430         _get_block_create_0(inode, block, bh_result, 0);
 431         reiserfs_write_unlock(inode->i_sb);
 432         return 0;
 433 }
 434
 435 /* special version of get_block that is only used by grab_tail_page right
 436 ** now.  It is sent to block_prepare_write, and when you try to get a
 437 ** block past the end of the file (or a block from a hole) it returns
 438 ** -ENOENT instead of a valid buffer.  block_prepare_write expects to
 439 ** be able to do i/o on the buffers returned, unless an error value
 440 ** is also returned.
 441 **
 442 ** So, this allows block_prepare_write to be used for reading a single block
 443 ** in a page.  Where it does not produce a valid page for holes, or past the
 444 ** end of the file.  This turns out to be exactly what we need for reading
 445 ** tails for conversion.
 446 **
 447 ** The point of the wrapper is forcing a certain value for create, even
 448 ** though the VFS layer is calling this function with create==1.  If you
 449 ** don't want to send create == GET_BLOCK_NO_HOLE to reiserfs_get_block,
 450 ** don't use this function.
 451 */
 452 static int reiserfs_get_block_create_0(struct inode *inode, sector_t block,
 453                                        struct buffer_head *bh_result,
 454                                        int create)
 455 {
 456         return reiserfs_get_block(inode, block, bh_result, GET_BLOCK_NO_HOLE);
 457 }
 458
 459 /* This is special helper for reiserfs_get_block in case we are executing
 460    direct_IO request. */
 461 static int reiserfs_get_blocks_direct_io(struct inode *inode,
 462                                          sector_t iblock,
 463                                          struct buffer_head *bh_result,
 464                                          int create)
 465 {
 466         int ret;
 467
 468         bh_result->b_page = NULL;
 469
 470         /* We set the b_size before reiserfs_get_block call since it is
 471            referenced in convert_tail_for_hole() that may be called from
 472            reiserfs_get_block() */
 473         bh_result->b_size = (1 << inode->i_blkbits);
 474
 475         ret = reiserfs_get_block(inode, iblock, bh_result,
 476                                  create | GET_BLOCK_NO_DANGLE);
 477         if (ret)
 478                 goto out;
 479
 480         /* don't allow direct io onto tail pages */
 481         if (buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
 482                 /* make sure future calls to the direct io funcs for this offset
 483                  ** in the file fail by unmapping the buffer
 484                  */
 485                 clear_buffer_mapped(bh_result);
 486                 ret = -EINVAL;
 487         }
 488         /* Possible unpacked tail. Flush the data before pages have
 489            disappeared */
 490         if (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) {
 491                 int err;
 492                 lock_kernel();
 493                 err = reiserfs_commit_for_inode(inode);
 494                 REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
 495                 unlock_kernel();
 496                 if (err < 0)
 497                         ret = err;
 498         }
 499       out:
 500         return ret;
 501 }
 502
 503 /*
 504 ** helper function for when reiserfs_get_block is called for a hole
 505 ** but the file tail is still in a direct item
 506 ** bh_result is the buffer head for the hole
 507 ** tail_offset is the offset of the start of the tail in the file
 508 **
 509 ** This calls prepare_write, which will start a new transaction
 510 ** you should not be in a transaction, or have any paths held when you
 511 ** call this.
 512 */
 513 static int convert_tail_for_hole(struct inode *inode,
 514                                  struct buffer_head *bh_result,
 515                                  loff_t tail_offset)
 516 {
 517         unsigned long index;
 518         unsigned long tail_end;
 519         unsigned long tail_start;
 520         struct page *tail_page;
 521         struct page *hole_page = bh_result->b_page;
 522         int retval = 0;
 523
 524         if ((tail_offset & (bh_result->b_size - 1)) != 1)
 525                 return -EIO;
 526
 527         /* always try to read until the end of the block */
 528         tail_start = tail_offset & (PAGE_CACHE_SIZE - 1);
 529         tail_end = (tail_start | (bh_result->b_size - 1)) + 1;
 530
 531         index = tail_offset >> PAGE_CACHE_SHIFT;
 532         /* hole_page can be zero in case of direct_io, we are sure
 533            that we cannot get here if we write with O_DIRECT into
 534            tail page */
 535         if (!hole_page || index != hole_page->index) {
 536                 tail_page = grab_cache_page(inode->i_mapping, index);
 537                 retval = -ENOMEM;
 538                 if (!tail_page) {
 539                         goto out;
 540                 }
 541         } else {
 542                 tail_page = hole_page;
 543         }
 544
 545         /* we don't have to make sure the conversion did not happen while
 546          ** we were locking the page because anyone that could convert
 547          ** must first take i_mutex.
 548          **
 549          ** We must fix the tail page for writing because it might have buffers
 550          ** that are mapped, but have a block number of 0.  This indicates tail
 551          ** data that has been read directly into the page, and block_prepare_write
 552          ** won't trigger a get_block in this case.
 553          */
 554         fix_tail_page_for_writing(tail_page);
 555         retval = reiserfs_prepare_write(NULL, tail_page, tail_start, tail_end);
 556         if (retval)
 557                 goto unlock;
 558
 559         /* tail conversion might change the data in the page */
 560         flush_dcache_page(tail_page);
 561
 562         retval = reiserfs_commit_write(NULL, tail_page, tail_start, tail_end);
 563
 564       unlock:
 565         if (tail_page != hole_page) {
 566                 unlock_page(tail_page);
 567                 page_cache_release(tail_page);
 568         }
 569       out:
 570         return retval;
 571 }
 572
 573 static inline int _allocate_block(struct reiserfs_transaction_handle *th,
 574                                   sector_t block,
 575                                   struct inode *inode,
 576                                   b_blocknr_t * allocated_block_nr,
 577                                   struct treepath *path, int flags)
 578 {
 579         BUG_ON(!th->t_trans_id);
 580
 581 #ifdef REISERFS_PREALLOCATE
 582         if (!(flags & GET_BLOCK_NO_IMUX)) {
 583                 return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
 584                                                   path, block);
 585         }
 586 #endif
 587         return reiserfs_new_unf_blocknrs(th, inode, allocated_block_nr, path,
 588                                          block);
 589 }
 590
 591 int reiserfs_get_block(struct inode *inode, sector_t block,
 592                        struct buffer_head *bh_result, int create)
 593 {
 594         int repeat, retval = 0;
 595         b_blocknr_t allocated_block_nr = 0;     // b_blocknr_t is (unsigned) 32 bit int
 596         INITIALIZE_PATH(path);
 597         int pos_in_item;
 598         struct cpu_key key;
 599         struct buffer_head *bh, *unbh = NULL;
 600         struct item_head *ih, tmp_ih;
 601         __le32 *item;
 602         int done;
 603         int fs_gen;
 604         struct reiserfs_transaction_handle *th = NULL;
 605         /* space reserved in transaction batch:
 606            . 3 balancings in direct->indirect conversion
 607            . 1 block involved into reiserfs_update_sd()
 608            XXX in practically impossible worst case direct2indirect()
 609            can incur (much) more than 3 balancings.
 610            quota update for user, group */
 611         int jbegin_count =
 612             JOURNAL_PER_BALANCE_CNT * 3 + 1 +
 613             2 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
 614         int version;
 615         int dangle = 1;
 616         loff_t new_offset =
 617             (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1;
 618
 619         /* bad.... */
 620         reiserfs_write_lock(inode->i_sb);
 621         version = get_inode_item_key_version(inode);
 622
 623         if (!file_capable(inode, block)) {
 624                 reiserfs_write_unlock(inode->i_sb);
 625                 return -EFBIG;
 626         }
 627
 628         /* if !create, we aren't changing the FS, so we don't need to
 629          ** log anything, so we don't need to start a transaction
 630          */
 631         if (!(create & GET_BLOCK_CREATE)) {
 632                 int ret;
 633                 /* find number of block-th logical block of the file */
 634                 ret = _get_block_create_0(inode, block, bh_result,
 635                                           create | GET_BLOCK_READ_DIRECT);
 636                 reiserfs_write_unlock(inode->i_sb);
 637                 return ret;
 638         }
 639         /*
 640          * if we're already in a transaction, make sure to close
 641          * any new transactions we start in this func
 642          */
 643         if ((create & GET_BLOCK_NO_DANGLE) ||
 644             reiserfs_transaction_running(inode->i_sb))
 645                 dangle = 0;
 646
 647         /* If file is of such a size, that it might have a tail and tails are enabled
 648          ** we should mark it as possibly needing tail packing on close
 649          */
 650         if ((have_large_tails(inode->i_sb)
 651              && inode->i_size < i_block_size(inode) * 4)
 652             || (have_small_tails(inode->i_sb)
 653                 && inode->i_size < i_block_size(inode)))
 654                 REISERFS_I(inode)->i_flags |= i_pack_on_close_mask;
 655
 656         /* set the key of the first byte in the 'block'-th block of file */
 657         make_cpu_key(&key, inode, new_offset, TYPE_ANY, 3 /*key length */ );
 658         if ((new_offset + inode->i_sb->s_blocksize - 1) > inode->i_size) {
 659               start_trans:
 660                 th = reiserfs_persistent_transaction(inode->i_sb, jbegin_count);
 661                 if (!th) {
 662                         retval = -ENOMEM;
 663                         goto failure;
 664                 }
 665                 reiserfs_update_inode_transaction(inode);
 666         }
 667       research:
 668
 669         retval = search_for_position_by_key(inode->i_sb, &key, &path);
 670         if (retval == IO_ERROR) {
 671                 retval = -EIO;
 672                 goto failure;
 673         }
 674
 675         bh = get_last_bh(&path);
 676         ih = get_ih(&path);
 677         item = get_item(&path);
 678         pos_in_item = path.pos_in_item;
 679
 680         fs_gen = get_generation(inode->i_sb);
 681         copy_item_head(&tmp_ih, ih);
 682
 683         if (allocation_needed
 684             (retval, allocated_block_nr, ih, item, pos_in_item)) {
 685                 /* we have to allocate block for the unformatted node */
 686                 if (!th) {
 687                         pathrelse(&path);
 688                         goto start_trans;
 689                 }
 690
 691                 repeat =
 692                     _allocate_block(th, block, inode, &allocated_block_nr,
 693                                     &path, create);
 694
 695                 if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) {
 696                         /* restart the transaction to give the journal a chance to free
 697                          ** some blocks.  releases the path, so we have to go back to
 698                          ** research if we succeed on the second try
 699                          */
 700                         SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1;
 701                         retval = restart_transaction(th, inode, &path);
 702                         if (retval)
 703                                 goto failure;
 704                         repeat =
 705                             _allocate_block(th, block, inode,
 706                                             &allocated_block_nr, NULL, create);
 707
 708                         if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) {
 709                                 goto research;
 710                         }
 711                         if (repeat == QUOTA_EXCEEDED)
 712                                 retval = -EDQUOT;
 713                         else
 714                                 retval = -ENOSPC;
 715                         goto failure;
 716                 }
 717
 718                 if (fs_changed(fs_gen, inode->i_sb)
 719                     && item_moved(&tmp_ih, &path)) {
 720                         goto research;
 721                 }
 722         }
 723
 724         if (indirect_item_found(retval, ih)) {
 725                 b_blocknr_t unfm_ptr;
 726                 /* 'block'-th block is in the file already (there is
 727                    corresponding cell in some indirect item). But it may be
 728                    zero unformatted node pointer (hole) */
 729                 unfm_ptr = get_block_num(item, pos_in_item);
 730                 if (unfm_ptr == 0) {
 731                         /* use allocated block to plug the hole */
 732                         reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
 733                         if (fs_changed(fs_gen, inode->i_sb)
 734                             && item_moved(&tmp_ih, &path)) {
 735                                 reiserfs_restore_prepared_buffer(inode->i_sb,
 736                                                                  bh);
 737                                 goto research;
 738                         }
 739                         set_buffer_new(bh_result);
 740                         if (buffer_dirty(bh_result)
 741                             && reiserfs_data_ordered(inode->i_sb))
 742                                 reiserfs_add_ordered_list(inode, bh_result);
 743                         put_block_num(item, pos_in_item, allocated_block_nr);
 744                         unfm_ptr = allocated_block_nr;
 745                         journal_mark_dirty(th, inode->i_sb, bh);
 746                         reiserfs_update_sd(th, inode);
 747                 }
 748                 set_block_dev_mapped(bh_result, unfm_ptr, inode);
 749                 pathrelse(&path);
 750                 retval = 0;
 751                 if (!dangle && th)
 752                         retval = reiserfs_end_persistent_transaction(th);
 753
 754                 reiserfs_write_unlock(inode->i_sb);
 755
 756                 /* the item was found, so new blocks were not added to the file
 757                  ** there is no need to make sure the inode is updated with this
 758                  ** transaction
 759                  */
 760                 return retval;
 761         }
 762
 763         if (!th) {
 764                 pathrelse(&path);
 765                 goto start_trans;
 766         }
 767
 768         /* desired position is not found or is in the direct item. We have
 769            to append file with holes up to 'block'-th block converting
 770            direct items to indirect one if necessary */
 771         done = 0;
 772         do {
 773                 if (is_statdata_le_ih(ih)) {
 774                         __le32 unp = 0;
 775                         struct cpu_key tmp_key;
 776
 777                         /* indirect item has to be inserted */
 778                         make_le_item_head(&tmp_ih, &key, version, 1,
 779                                           TYPE_INDIRECT, UNFM_P_SIZE,
 780                                           0 /* free_space */ );
 781
 782                         if (cpu_key_k_offset(&key) == 1) {
 783                                 /* we are going to add 'block'-th block to the file. Use
 784                                    allocated block for that */
 785                                 unp = cpu_to_le32(allocated_block_nr);
 786                                 set_block_dev_mapped(bh_result,
 787                                                      allocated_block_nr, inode);
 788                                 set_buffer_new(bh_result);
 789                                 done = 1;
 790                         }
 791                         tmp_key = key;  // ;)
 792                         set_cpu_key_k_offset(&tmp_key, 1);
 793                         PATH_LAST_POSITION(&path)++;
 794
 795                         retval =
 796                             reiserfs_insert_item(th, &path, &tmp_key, &tmp_ih,
 797                                                  inode, (char *)&unp);
 798                         if (retval) {
 799                                 reiserfs_free_block(th, inode,
 800                                                     allocated_block_nr, 1);
 801                                 goto failure;   // retval == -ENOSPC, -EDQUOT or -EIO or -EEXIST
 802                         }
 803                         //mark_tail_converted (inode);
 804                 } else if (is_direct_le_ih(ih)) {
 805                         /* direct item has to be converted */
 806                         loff_t tail_offset;
 807
 808                         tail_offset =
 809                             ((le_ih_k_offset(ih) -
 810                               1) & ~(inode->i_sb->s_blocksize - 1)) + 1;
 811                         if (tail_offset == cpu_key_k_offset(&key)) {
 812                                 /* direct item we just found fits into block we have
 813                                    to map. Convert it into unformatted node: use
 814                                    bh_result for the conversion */
 815                                 set_block_dev_mapped(bh_result,
 816                                                      allocated_block_nr, inode);
 817                                 unbh = bh_result;
 818                                 done = 1;
 819                         } else {
 820                                 /* we have to padd file tail stored in direct item(s)
 821                                    up to block size and convert it to unformatted
 822                                    node. FIXME: this should also get into page cache */
 823
 824                                 pathrelse(&path);
 825                                 /*
 826                                  * ugly, but we can only end the transaction if
 827                                  * we aren't nested
 828                                  */
 829                                 BUG_ON(!th->t_refcount);
 830                                 if (th->t_refcount == 1) {
 831                                         retval =
 832                                             reiserfs_end_persistent_transaction
 833                                             (th);
 834                                         th = NULL;
 835                                         if (retval)
 836                                                 goto failure;
 837                                 }
 838
 839                                 retval =
 840                                     convert_tail_for_hole(inode, bh_result,
 841                                                           tail_offset);
 842                                 if (retval) {
 843                                         if (retval != -ENOSPC)
 844                                                 reiserfs_error(inode->i_sb,
 845                                                         "clm-6004",
 846                                                         "convert tail failed "
 847                                                         "inode %lu, error %d",
 848                                                         inode->i_ino,
 849                                                         retval);
 850                                         if (allocated_block_nr) {
 851                                                 /* the bitmap, the super, and the stat data == 3 */
 852                                                 if (!th)
 853                                                         th = reiserfs_persistent_transaction(inode->i_sb, 3);
 854                                                 if (th)
 855                                                         reiserfs_free_block(th,
 856                                                                             inode,
 857                                                                             allocated_block_nr,
 858                                                                             1);
 859                                         }
 860                                         goto failure;
 861                                 }
 862                                 goto research;
 863                         }
 864                         retval =
 865                             direct2indirect(th, inode, &path, unbh,
 866                                             tail_offset);
 867                         if (retval) {
 868                                 reiserfs_unmap_buffer(unbh);
 869                                 reiserfs_free_block(th, inode,
 870                                                     allocated_block_nr, 1);
 871                                 goto failure;
 872                         }
 873                         /* it is important the set_buffer_uptodate is done after
 874                          ** the direct2indirect.  The buffer might contain valid
 875                          ** data newer than the data on disk (read by readpage, changed,
 876                          ** and then sent here by writepage).  direct2indirect needs
 877                          ** to know if unbh was already up to date, so it can decide
 878                          ** if the data in unbh needs to be replaced with data from
 879                          ** the disk
 880                          */
 881                         set_buffer_uptodate(unbh);
 882
 883                         /* unbh->b_page == NULL in case of DIRECT_IO request, this means
 884                            buffer will disappear shortly, so it should not be added to
 885                          */
 886                         if (unbh->b_page) {
 887                                 /* we've converted the tail, so we must
 888                                  ** flush unbh before the transaction commits
 889                                  */
 890                                 reiserfs_add_tail_list(inode, unbh);
 891
 892                                 /* mark it dirty now to prevent commit_write from adding
 893                                  ** this buffer to the inode's dirty buffer list
 894                                  */
 895                                 /*
 896                                  * AKPM: changed __mark_buffer_dirty to mark_buffer_dirty().
 897                                  * It's still atomic, but it sets the page dirty too,
 898                                  * which makes it eligible for writeback at any time by the
 899                                  * VM (which was also the case with __mark_buffer_dirty())
 900                                  */
 901                                 mark_buffer_dirty(unbh);
 902                         }
 903                 } else {
 904                         /* append indirect item with holes if needed, when appending
 905                            pointer to 'block'-th block use block, which is already
 906                            allocated */
 907                         struct cpu_key tmp_key;
 908                         unp_t unf_single = 0;   // We use this in case we need to allocate only
 909                         // one block which is a fastpath
 910                         unp_t *un;
 911                         __u64 max_to_insert =
 912                             MAX_ITEM_LEN(inode->i_sb->s_blocksize) /
 913                             UNFM_P_SIZE;
 914                         __u64 blocks_needed;
 915
 916                         RFALSE(pos_in_item != ih_item_len(ih) / UNFM_P_SIZE,
 917                                "vs-804: invalid position for append");
 918                         /* indirect item has to be appended, set up key of that position */
 919                         make_cpu_key(&tmp_key, inode,
 920                                      le_key_k_offset(version,
 921                                                      &(ih->ih_key)) +
 922                                      op_bytes_number(ih,
 923                                                      inode->i_sb->s_blocksize),
 924                                      //pos_in_item * inode->i_sb->s_blocksize,
 925                                      TYPE_INDIRECT, 3); // key type is unimportant
 926
 927                         RFALSE(cpu_key_k_offset(&tmp_key) > cpu_key_k_offset(&key),
 928                                "green-805: invalid offset");
 929                         blocks_needed =
 930                             1 +
 931                             ((cpu_key_k_offset(&key) -
 932                               cpu_key_k_offset(&tmp_key)) >> inode->i_sb->
 933                              s_blocksize_bits);
 934
 935                         if (blocks_needed == 1) {
 936                                 un = &unf_single;
 937                         } else {
 938                                 un = kzalloc(min(blocks_needed, max_to_insert) * UNFM_P_SIZE, GFP_ATOMIC);      // We need to avoid scheduling.
 939                                 if (!un) {
 940                                         un = &unf_single;
 941                                         blocks_needed = 1;
 942                                         max_to_insert = 0;
 943                                 }
 944                         }
 945                         if (blocks_needed <= max_to_insert) {
 946                                 /* we are going to add target block to the file. Use allocated
 947                                    block for that */
 948                                 un[blocks_needed - 1] =
 949                                     cpu_to_le32(allocated_block_nr);
 950                                 set_block_dev_mapped(bh_result,
 951                                                      allocated_block_nr, inode);
 952                                 set_buffer_new(bh_result);
 953                                 done = 1;
 954                         } else {
 955                                 /* paste hole to the indirect item */
 956                                 /* If kmalloc failed, max_to_insert becomes zero and it means we
 957                                    only have space for one block */
 958                                 blocks_needed =
 959                                     max_to_insert ? max_to_insert : 1;
 960                         }
 961                         retval =
 962                             reiserfs_paste_into_item(th, &path, &tmp_key, inode,
 963                                                      (char *)un,
 964                                                      UNFM_P_SIZE *
 965                                                      blocks_needed);
 966
 967                         if (blocks_needed != 1)
 968                                 kfree(un);
 969
 970                         if (retval) {
 971                                 reiserfs_free_block(th, inode,
 972                                                     allocated_block_nr, 1);
 973                                 goto failure;
 974                         }
 975                         if (!done) {
 976                                 /* We need to mark new file size in case this function will be
 977                                    interrupted/aborted later on. And we may do this only for
 978                                    holes. */
 979                                 inode->i_size +=
 980                                     inode->i_sb->s_blocksize * blocks_needed;
 981                         }
 982                 }
 983
 984                 if (done == 1)
 985                         break;
 986
 987                 /* this loop could log more blocks than we had originally asked
 988                  ** for.  So, we have to allow the transaction to end if it is
 989                  ** too big or too full.  Update the inode so things are
 990                  ** consistent if we crash before the function returns
 991                  **
 992                  ** release the path so that anybody waiting on the path before
 993                  ** ending their transaction will be able to continue.
 994                  */
 995                 if (journal_transaction_should_end(th, th->t_blocks_allocated)) {
 996                         retval = restart_transaction(th, inode, &path);
 997                         if (retval)
 998                                 goto failure;
 999                 }
1000                 /* inserting indirect pointers for a hole can take a
1001                  ** long time.  reschedule if needed
1002                  */
1003                 cond_resched();
1004
1005                 retval = search_for_position_by_key(inode->i_sb, &key, &path);
1006                 if (retval == IO_ERROR) {
1007                         retval = -EIO;
1008                         goto failure;
1009                 }
1010                 if (retval == POSITION_FOUND) {
1011                         reiserfs_warning(inode->i_sb, "vs-825",
1012                                          "%K should not be found", &key);
1013                         retval = -EEXIST;
1014                         if (allocated_block_nr)
1015                                 reiserfs_free_block(th, inode,
1016                                                     allocated_block_nr, 1);
1017                         pathrelse(&path);
1018                         goto failure;
1019                 }
1020                 bh = get_last_bh(&path);
1021                 ih = get_ih(&path);
1022                 item = get_item(&path);
1023                 pos_in_item = path.pos_in_item;
1024         } while (1);
1025
1026         retval = 0;
1027
1028       failure:
1029         if (th && (!dangle || (retval && !th->t_trans_id))) {
1030                 int err;
1031                 if (th->t_trans_id)
1032                         reiserfs_update_sd(th, inode);
1033                 err = reiserfs_end_persistent_transaction(th);
1034                 if (err)
1035                         retval = err;
1036         }
1037
1038         reiserfs_write_unlock(inode->i_sb);
1039         reiserfs_check_path(&path);
1040         return retval;
1041 }
1042
1043 static int
1044 reiserfs_readpages(struct file *file, struct address_space *mapping,
1045                    struct list_head *pages, unsigned nr_pages)
1046 {
1047         return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block);
1048 }
1049
1050 /* Compute real number of used bytes by file
1051  * Following three functions can go away when we'll have enough space in stat item
1052  */
1053 static int real_space_diff(struct inode *inode, int sd_size)
1054 {
1055         int bytes;
1056         loff_t blocksize = inode->i_sb->s_blocksize;
1057
1058         if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode))
1059                 return sd_size;
1060
1061         /* End of file is also in full block with indirect reference, so round
1062          ** up to the next block.
1063          **
1064          ** there is just no way to know if the tail is actually packed
1065          ** on the file, so we have to assume it isn't.  When we pack the
1066          ** tail, we add 4 bytes to pretend there really is an unformatted
1067          ** node pointer
1068          */
1069         bytes =
1070             ((inode->i_size +
1071               (blocksize - 1)) >> inode->i_sb->s_blocksize_bits) * UNFM_P_SIZE +
1072             sd_size;
1073         return bytes;
1074 }
1075
1076 static inline loff_t to_real_used_space(struct inode *inode, ulong blocks,
1077                                         int sd_size)
1078 {
1079         if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
1080                 return inode->i_size +
1081                     (loff_t) (real_space_diff(inode, sd_size));
1082         }
1083         return ((loff_t) real_space_diff(inode, sd_size)) +
1084             (((loff_t) blocks) << 9);
1085 }
1086
1087 /* Compute number of blocks used by file in ReiserFS counting */
1088 static inline ulong to_fake_used_blocks(struct inode *inode, int sd_size)
1089 {
1090         loff_t bytes = inode_get_bytes(inode);
1091         loff_t real_space = real_space_diff(inode, sd_size);
1092
1093         /* keeps fsck and non-quota versions of reiserfs happy */
1094         if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
1095                 bytes += (loff_t) 511;
1096         }
1097
1098         /* files from before the quota patch might i_blocks such that
1099          ** bytes < real_space.  Deal with that here to prevent it from
1100          ** going negative.
1101          */
1102         if (bytes < real_space)
1103                 return 0;
1104         return (bytes - real_space) >> 9;
1105 }
1106
1107 //
1108 // BAD: new directories have stat data of new type and all other items
1109 // of old type. Version stored in the inode says about body items, so
1110 // in update_stat_data we can not rely on inode, but have to check
1111 // item version directly
1112 //
1113
1114 // called by read_locked_inode
1115 static void init_inode(struct inode *inode, struct treepath *path)
1116 {
1117         struct buffer_head *bh;
1118         struct item_head *ih;
1119         __u32 rdev;
1120         //int version = ITEM_VERSION_1;
1121
1122         bh = PATH_PLAST_BUFFER(path);
1123         ih = PATH_PITEM_HEAD(path);
1124
1125         copy_key(INODE_PKEY(inode), &(ih->ih_key));
1126
1127         INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list));
1128         REISERFS_I(inode)->i_flags = 0;
1129         REISERFS_I(inode)->i_prealloc_block = 0;
1130         REISERFS_I(inode)->i_prealloc_count = 0;
1131         REISERFS_I(inode)->i_trans_id = 0;
1132         REISERFS_I(inode)->i_jl = NULL;
1133         mutex_init(&(REISERFS_I(inode)->i_mmap));
1134         reiserfs_init_xattr_rwsem(inode);
1135
1136         if (stat_data_v1(ih)) {
1137                 struct stat_data_v1 *sd =
1138                     (struct stat_data_v1 *)B_I_PITEM(bh, ih);
1139                 unsigned long blocks;
1140
1141                 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1142                 set_inode_sd_version(inode, STAT_DATA_V1);
1143                 inode->i_mode = sd_v1_mode(sd);
1144                 inode->i_nlink = sd_v1_nlink(sd);
1145                 inode->i_uid = sd_v1_uid(sd);
1146                 inode->i_gid = sd_v1_gid(sd);
1147                 inode->i_size = sd_v1_size(sd);
1148                 inode->i_atime.tv_sec = sd_v1_atime(sd);
1149                 inode->i_mtime.tv_sec = sd_v1_mtime(sd);
1150                 inode->i_ctime.tv_sec = sd_v1_ctime(sd);
1151                 inode->i_atime.tv_nsec = 0;
1152                 inode->i_ctime.tv_nsec = 0;
1153                 inode->i_mtime.tv_nsec = 0;
1154
1155                 inode->i_blocks = sd_v1_blocks(sd);
1156                 inode->i_generation = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1157                 blocks = (inode->i_size + 511) >> 9;
1158                 blocks = _ROUND_UP(blocks, inode->i_sb->s_blocksize >> 9);
1159                 if (inode->i_blocks > blocks) {
1160                         // there was a bug in <=3.5.23 when i_blocks could take negative
1161                         // values. Starting from 3.5.17 this value could even be stored in
1162                         // stat data. For such files we set i_blocks based on file
1163                         // size. Just 2 notes: this can be wrong for sparce files. On-disk value will be
1164                         // only updated if file's inode will ever change
1165                         inode->i_blocks = blocks;
1166                 }
1167
1168                 rdev = sd_v1_rdev(sd);
1169                 REISERFS_I(inode)->i_first_direct_byte =
1170                     sd_v1_first_direct_byte(sd);
1171                 /* an early bug in the quota code can give us an odd number for the
1172                  ** block count.  This is incorrect, fix it here.
1173                  */
1174                 if (inode->i_blocks & 1) {
1175                         inode->i_blocks++;
1176                 }
1177                 inode_set_bytes(inode,
1178                                 to_real_used_space(inode, inode->i_blocks,
1179                                                    SD_V1_SIZE));
1180                 /* nopack is initially zero for v1 objects. For v2 objects,
1181                    nopack is initialised from sd_attrs */
1182                 REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
1183         } else {
1184                 // new stat data found, but object may have old items
1185                 // (directories and symlinks)
1186                 struct stat_data *sd = (struct stat_data *)B_I_PITEM(bh, ih);
1187
1188                 inode->i_mode = sd_v2_mode(sd);
1189                 inode->i_nlink = sd_v2_nlink(sd);
1190                 inode->i_uid = sd_v2_uid(sd);
1191                 inode->i_size = sd_v2_size(sd);
1192                 inode->i_gid = sd_v2_gid(sd);
1193                 inode->i_mtime.tv_sec = sd_v2_mtime(sd);
1194                 inode->i_atime.tv_sec = sd_v2_atime(sd);
1195                 inode->i_ctime.tv_sec = sd_v2_ctime(sd);
1196                 inode->i_ctime.tv_nsec = 0;
1197                 inode->i_mtime.tv_nsec = 0;
1198                 inode->i_atime.tv_nsec = 0;
1199                 inode->i_blocks = sd_v2_blocks(sd);
1200                 rdev = sd_v2_rdev(sd);
1201                 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1202                         inode->i_generation =
1203                             le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1204                 else
1205                         inode->i_generation = sd_v2_generation(sd);
1206
1207                 if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
1208                         set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1209                 else
1210                         set_inode_item_key_version(inode, KEY_FORMAT_3_6);
1211                 REISERFS_I(inode)->i_first_direct_byte = 0;
1212                 set_inode_sd_version(inode, STAT_DATA_V2);
1213                 inode_set_bytes(inode,
1214                                 to_real_used_space(inode, inode->i_blocks,
1215                                                    SD_V2_SIZE));
1216                 /* read persistent inode attributes from sd and initalise
1217                    generic inode flags from them */
1218                 REISERFS_I(inode)->i_attrs = sd_v2_attrs(sd);
1219                 sd_attrs_to_i_attrs(sd_v2_attrs(sd), inode);
1220         }
1221
1222         pathrelse(path);
1223         if (S_ISREG(inode->i_mode)) {
1224                 inode->i_op = &reiserfs_file_inode_operations;
1225                 inode->i_fop = &reiserfs_file_operations;
1226                 inode->i_mapping->a_ops = &reiserfs_address_space_operations;
1227         } else if (S_ISDIR(inode->i_mode)) {
1228                 inode->i_op = &reiserfs_dir_inode_operations;
1229                 inode->i_fop = &reiserfs_dir_operations;
1230         } else if (S_ISLNK(inode->i_mode)) {
1231                 inode->i_op = &reiserfs_symlink_inode_operations;
1232                 inode->i_mapping->a_ops = &reiserfs_address_space_operations;
1233         } else {
1234                 inode->i_blocks = 0;
1235                 inode->i_op = &reiserfs_special_inode_operations;
1236                 init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
1237         }
1238 }
1239
1240 // update new stat data with inode fields
1241 static void inode2sd(void *sd, struct inode *inode, loff_t size)
1242 {
1243         struct stat_data *sd_v2 = (struct stat_data *)sd;
1244         __u16 flags;
1245
1246         set_sd_v2_mode(sd_v2, inode->i_mode);
1247         set_sd_v2_nlink(sd_v2, inode->i_nlink);
1248         set_sd_v2_uid(sd_v2, inode->i_uid);
1249         set_sd_v2_size(sd_v2, size);
1250         set_sd_v2_gid(sd_v2, inode->i_gid);
1251         set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec);
1252         set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec);
1253         set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec);
1254         set_sd_v2_blocks(sd_v2, to_fake_used_blocks(inode, SD_V2_SIZE));
1255         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1256                 set_sd_v2_rdev(sd_v2, new_encode_dev(inode->i_rdev));
1257         else
1258                 set_sd_v2_generation(sd_v2, inode->i_generation);
1259         flags = REISERFS_I(inode)->i_attrs;
1260         i_attrs_to_sd_attrs(inode, &flags);
1261         set_sd_v2_attrs(sd_v2, flags);
1262 }
1263
1264 // used to copy inode's fields to old stat data
1265 static void inode2sd_v1(void *sd, struct inode *inode, loff_t size)
1266 {
1267         struct stat_data_v1 *sd_v1 = (struct stat_data_v1 *)sd;
1268
1269         set_sd_v1_mode(sd_v1, inode->i_mode);
1270         set_sd_v1_uid(sd_v1, inode->i_uid);
1271         set_sd_v1_gid(sd_v1, inode->i_gid);
1272         set_sd_v1_nlink(sd_v1, inode->i_nlink);
1273         set_sd_v1_size(sd_v1, size);
1274         set_sd_v1_atime(sd_v1, inode->i_atime.tv_sec);
1275         set_sd_v1_ctime(sd_v1, inode->i_ctime.tv_sec);
1276         set_sd_v1_mtime(sd_v1, inode->i_mtime.tv_sec);
1277
1278         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1279                 set_sd_v1_rdev(sd_v1, new_encode_dev(inode->i_rdev));
1280         else
1281                 set_sd_v1_blocks(sd_v1, to_fake_used_blocks(inode, SD_V1_SIZE));
1282
1283         // Sigh. i_first_direct_byte is back
1284         set_sd_v1_first_direct_byte(sd_v1,
1285                                     REISERFS_I(inode)->i_first_direct_byte);
1286 }
1287
1288 /* NOTE, you must prepare the buffer head before sending it here,
1289 ** and then log it after the call
1290 */
1291 static void update_stat_data(struct treepath *path, struct inode *inode,
1292                              loff_t size)
1293 {
1294         struct buffer_head *bh;
1295         struct item_head *ih;
1296
1297         bh = PATH_PLAST_BUFFER(path);
1298         ih = PATH_PITEM_HEAD(path);
1299
1300         if (!is_statdata_le_ih(ih))
1301                 reiserfs_panic(inode->i_sb, "vs-13065", "key %k, found item %h",
1302                                INODE_PKEY(inode), ih);
1303
1304         if (stat_data_v1(ih)) {
1305                 // path points to old stat data
1306                 inode2sd_v1(B_I_PITEM(bh, ih), inode, size);
1307         } else {
1308                 inode2sd(B_I_PITEM(bh, ih), inode, size);
1309         }
1310
1311         return;
1312 }
1313
1314 void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
1315                              struct inode *inode, loff_t size)
1316 {
1317         struct cpu_key key;
1318         INITIALIZE_PATH(path);
1319         struct buffer_head *bh;
1320         int fs_gen;
1321         struct item_head *ih, tmp_ih;
1322         int retval;
1323
1324         BUG_ON(!th->t_trans_id);
1325
1326         make_cpu_key(&key, inode, SD_OFFSET, TYPE_STAT_DATA, 3);        //key type is unimportant
1327
1328         for (;;) {
1329                 int pos;
1330                 /* look for the object's stat data */
1331                 retval = search_item(inode->i_sb, &key, &path);
1332                 if (retval == IO_ERROR) {
1333                         reiserfs_error(inode->i_sb, "vs-13050",
1334                                        "i/o failure occurred trying to "
1335                                        "update %K stat data", &key);
1336                         return;
1337                 }
1338                 if (retval == ITEM_NOT_FOUND) {
1339                         pos = PATH_LAST_POSITION(&path);
1340                         pathrelse(&path);
1341                         if (inode->i_nlink == 0) {
1342                                 /*reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: i_nlink == 0, stat data not found"); */
1343                                 return;
1344                         }
1345                         reiserfs_warning(inode->i_sb, "vs-13060",
1346                                          "stat data of object %k (nlink == %d) "
1347                                          "not found (pos %d)",
1348                                          INODE_PKEY(inode), inode->i_nlink,
1349                                          pos);
1350                         reiserfs_check_path(&path);
1351                         return;
1352                 }
1353
1354                 /* sigh, prepare_for_journal might schedule.  When it schedules the
1355                  ** FS might change.  We have to detect that, and loop back to the
1356                  ** search if the stat data item has moved
1357                  */
1358                 bh = get_last_bh(&path);
1359                 ih = get_ih(&path);
1360                 copy_item_head(&tmp_ih, ih);
1361                 fs_gen = get_generation(inode->i_sb);
1362                 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
1363                 if (fs_changed(fs_gen, inode->i_sb)
1364                     && item_moved(&tmp_ih, &path)) {
1365                         reiserfs_restore_prepared_buffer(inode->i_sb, bh);
1366                         continue;       /* Stat_data item has been moved after scheduling. */
1367                 }
1368                 break;
1369         }
1370         update_stat_data(&path, inode, size);
1371         journal_mark_dirty(th, th->t_super, bh);
1372         pathrelse(&path);
1373         return;
1374 }
1375
1376 /* reiserfs_read_locked_inode is called to read the inode off disk, and it
1377 ** does a make_bad_inode when things go wrong.  But, we need to make sure
1378 ** and clear the key in the private portion of the inode, otherwise a
1379 ** corresponding iput might try to delete whatever object the inode last
1380 ** represented.
1381 */
1382 static void reiserfs_make_bad_inode(struct inode *inode)
1383 {
1384         memset(INODE_PKEY(inode), 0, KEY_SIZE);
1385         make_bad_inode(inode);
1386 }
1387
1388 //
1389 // initially this function was derived from minix or ext2's analog and
1390 // evolved as the prototype did
1391 //
1392
1393 int reiserfs_init_locked_inode(struct inode *inode, void *p)
1394 {
1395         struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p;
1396         inode->i_ino = args->objectid;
1397         INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->dirid);
1398         return 0;
1399 }
1400
1401 /* looks for stat data in the tree, and fills up the fields of in-core
1402    inode stat data fields */
1403 void reiserfs_read_locked_inode(struct inode *inode,
1404                                 struct reiserfs_iget_args *args)
1405 {
1406         INITIALIZE_PATH(path_to_sd);
1407         struct cpu_key key;
1408         unsigned long dirino;
1409         int retval;
1410
1411         dirino = args->dirid;
1412
1413         /* set version 1, version 2 could be used too, because stat data
1414            key is the same in both versions */
1415         key.version = KEY_FORMAT_3_5;
1416         key.on_disk_key.k_dir_id = dirino;
1417         key.on_disk_key.k_objectid = inode->i_ino;
1418         key.on_disk_key.k_offset = 0;
1419         key.on_disk_key.k_type = 0;
1420
1421         /* look for the object's stat data */
1422         retval = search_item(inode->i_sb, &key, &path_to_sd);
1423         if (retval == IO_ERROR) {
1424                 reiserfs_error(inode->i_sb, "vs-13070",
1425                                "i/o failure occurred trying to find "
1426                                "stat data of %K", &key);
1427                 reiserfs_make_bad_inode(inode);
1428                 return;
1429         }
1430         if (retval != ITEM_FOUND) {
1431                 /* a stale NFS handle can trigger this without it being an error */
1432                 pathrelse(&path_to_sd);
1433                 reiserfs_make_bad_inode(inode);
1434                 inode->i_nlink = 0;
1435                 return;
1436         }
1437
1438         init_inode(inode, &path_to_sd);
1439
1440         /* It is possible that knfsd is trying to access inode of a file
1441            that is being removed from the disk by some other thread. As we
1442            update sd on unlink all that is required is to check for nlink
1443            here. This bug was first found by Sizif when debugging
1444            SquidNG/Butterfly, forgotten, and found again after Philippe
1445            Gramoulle <philippe.gramoulle@mmania.com> reproduced it.
1446
1447            More logical fix would require changes in fs/inode.c:iput() to
1448            remove inode from hash-table _after_ fs cleaned disk stuff up and
1449            in iget() to return NULL if I_FREEING inode is found in
1450            hash-table. */
1451         /* Currently there is one place where it's ok to meet inode with
1452            nlink==0: processing of open-unlinked and half-truncated files
1453            during mount (fs/reiserfs/super.c:finish_unfinished()). */
1454         if ((inode->i_nlink == 0) &&
1455             !REISERFS_SB(inode->i_sb)->s_is_unlinked_ok) {
1456                 reiserfs_warning(inode->i_sb, "vs-13075",
1457                                  "dead inode read from disk %K. "
1458                                  "This is likely to be race with knfsd. Ignore",
1459                                  &key);
1460                 reiserfs_make_bad_inode(inode);
1461         }
1462
1463         reiserfs_check_path(&path_to_sd);       /* init inode should be relsing */
1464
1465 }
1466
1467 /**
1468  * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked().
1469  *
1470  * @inode:    inode from hash table to check
1471  * @opaque:   "cookie" passed to iget5_locked(). This is &reiserfs_iget_args.
1472  *
1473  * This function is called by iget5_locked() to distinguish reiserfs inodes
1474  * having the same inode numbers. Such inodes can only exist due to some
1475  * error condition. One of them should be bad. Inodes with identical
1476  * inode numbers (objectids) are distinguished by parent directory ids.
1477  *
1478  */
1479 int reiserfs_find_actor(struct inode *inode, void *opaque)
1480 {
1481         struct reiserfs_iget_args *args;
1482
1483         args = opaque;
1484         /* args is already in CPU order */
1485         return (inode->i_ino == args->objectid) &&
1486             (le32_to_cpu(INODE_PKEY(inode)->k_dir_id) == args->dirid);
1487 }
1488
1489 struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key)
1490 {
1491         struct inode *inode;
1492         struct reiserfs_iget_args args;
1493
1494         args.objectid = key->on_disk_key.k_objectid;
1495         args.dirid = key->on_disk_key.k_dir_id;
1496         inode = iget5_locked(s, key->on_disk_key.k_objectid,
1497                              reiserfs_find_actor, reiserfs_init_locked_inode,
1498                              (void *)(&args));
1499         if (!inode)
1500                 return ERR_PTR(-ENOMEM);
1501
1502         if (inode->i_state & I_NEW) {
1503                 reiserfs_read_locked_inode(inode, &args);
1504                 unlock_new_inode(inode);
1505         }
1506
1507         if (comp_short_keys(INODE_PKEY(inode), key) || is_bad_inode(inode)) {
1508                 /* either due to i/o error or a stale NFS handle */
1509                 iput(inode);
1510                 inode = NULL;
1511         }
1512         return inode;
1513 }
1514
1515 static struct dentry *reiserfs_get_dentry(struct super_block *sb,
1516         u32 objectid, u32 dir_id, u32 generation)
1517
1518 {
1519         struct cpu_key key;
1520         struct inode *inode;
1521
1522         key.on_disk_key.k_objectid = objectid;
1523         key.on_disk_key.k_dir_id = dir_id;
1524         reiserfs_write_lock(sb);
1525         inode = reiserfs_iget(sb, &key);
1526         if (inode && !IS_ERR(inode) && generation != 0 &&
1527             generation != inode->i_generation) {
1528                 iput(inode);
1529                 inode = NULL;
1530         }
1531         reiserfs_write_unlock(sb);
1532
1533         return d_obtain_alias(inode);
1534 }
1535
1536 struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
1537                 int fh_len, int fh_type)
1538 {
1539         /* fhtype happens to reflect the number of u32s encoded.
1540          * due to a bug in earlier code, fhtype might indicate there
1541          * are more u32s then actually fitted.
1542          * so if fhtype seems to be more than len, reduce fhtype.
1543          * Valid types are:
1544          *   2 - objectid + dir_id - legacy support
1545          *   3 - objectid + dir_id + generation
1546          *   4 - objectid + dir_id + objectid and dirid of parent - legacy
1547          *   5 - objectid + dir_id + generation + objectid and dirid of parent
1548          *   6 - as above plus generation of directory
1549          * 6 does not fit in NFSv2 handles
1550          */
1551         if (fh_type > fh_len) {
1552                 if (fh_type != 6 || fh_len != 5)
1553                         reiserfs_warning(sb, "reiserfs-13077",
1554                                 "nfsd/reiserfs, fhtype=%d, len=%d - odd",
1555                                 fh_type, fh_len);
1556                 fh_type = 5;
1557         }
1558
1559         return reiserfs_get_dentry(sb, fid->raw[0], fid->raw[1],
1560                 (fh_type == 3 || fh_type >= 5) ? fid->raw[2] : 0);
1561 }
1562
1563 struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid,
1564                 int fh_len, int fh_type)
1565 {
1566         if (fh_type < 4)
1567                 return NULL;
1568
1569         return reiserfs_get_dentry(sb,
1570                 (fh_type >= 5) ? fid->raw[3] : fid->raw[2],
1571                 (fh_type >= 5) ? fid->raw[4] : fid->raw[3],
1572                 (fh_type == 6) ? fid->raw[5] : 0);
1573 }
1574
1575 int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
1576                        int need_parent)
1577 {
1578         struct inode *inode = dentry->d_inode;
1579         int maxlen = *lenp;
1580
1581         if (maxlen < 3)
1582                 return 255;
1583
1584         data[0] = inode->i_ino;
1585         data[1] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1586         data[2] = inode->i_generation;
1587         *lenp = 3;
1588         /* no room for directory info? return what we've stored so far */
1589         if (maxlen < 5 || !need_parent)
1590                 return 3;
1591
1592         spin_lock(&dentry->d_lock);
1593         inode = dentry->d_parent->d_inode;
1594         data[3] = inode->i_ino;
1595         data[4] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1596         *lenp = 5;
1597         if (maxlen >= 6) {
1598                 data[5] = inode->i_generation;
1599                 *lenp = 6;
1600         }
1601         spin_unlock(&dentry->d_lock);
1602         return *lenp;
1603 }
1604
1605 /* looks for stat data, then copies fields to it, marks the buffer
1606    containing stat data as dirty */
1607 /* reiserfs inodes are never really dirty, since the dirty inode call
1608 ** always logs them.  This call allows the VFS inode marking routines
1609 ** to properly mark inodes for datasync and such, but only actually
1610 ** does something when called for a synchronous update.
1611 */
1612 int reiserfs_write_inode(struct inode *inode, int do_sync)
1613 {
1614         struct reiserfs_transaction_handle th;
1615         int jbegin_count = 1;
1616
1617         if (inode->i_sb->s_flags & MS_RDONLY)
1618                 return -EROFS;
1619         /* memory pressure can sometimes initiate write_inode calls with sync == 1,
1620          ** these cases are just when the system needs ram, not when the
1621          ** inode needs to reach disk for safety, and they can safely be
1622          ** ignored because the altered inode has already been logged.
1623          */
1624         if (do_sync && !(current->flags & PF_MEMALLOC)) {
1625                 reiserfs_write_lock(inode->i_sb);
1626                 if (!journal_begin(&th, inode->i_sb, jbegin_count)) {
1627                         reiserfs_update_sd(&th, inode);
1628                         journal_end_sync(&th, inode->i_sb, jbegin_count);
1629                 }
1630                 reiserfs_write_unlock(inode->i_sb);
1631         }
1632         return 0;
1633 }
1634
1635 /* stat data of new object is inserted already, this inserts the item
1636    containing "." and ".." entries */
1637 static int reiserfs_new_directory(struct reiserfs_transaction_handle *th,
1638                                   struct inode *inode,
1639                                   struct item_head *ih, struct treepath *path,
1640                                   struct inode *dir)
1641 {
1642         struct super_block *sb = th->t_super;
1643         char empty_dir[EMPTY_DIR_SIZE];
1644         char *body = empty_dir;
1645         struct cpu_key key;
1646         int retval;
1647
1648         BUG_ON(!th->t_trans_id);
1649
1650         _make_cpu_key(&key, KEY_FORMAT_3_5, le32_to_cpu(ih->ih_key.k_dir_id),
1651                       le32_to_cpu(ih->ih_key.k_objectid), DOT_OFFSET,
1652                       TYPE_DIRENTRY, 3 /*key length */ );
1653
1654         /* compose item head for new item. Directories consist of items of
1655            old type (ITEM_VERSION_1). Do not set key (second arg is 0), it
1656            is done by reiserfs_new_inode */
1657         if (old_format_only(sb)) {
1658                 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
1659                                   TYPE_DIRENTRY, EMPTY_DIR_SIZE_V1, 2);
1660
1661                 make_empty_dir_item_v1(body, ih->ih_key.k_dir_id,
1662                                        ih->ih_key.k_objectid,
1663                                        INODE_PKEY(dir)->k_dir_id,
1664                                        INODE_PKEY(dir)->k_objectid);
1665         } else {
1666                 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
1667                                   TYPE_DIRENTRY, EMPTY_DIR_SIZE, 2);
1668
1669                 make_empty_dir_item(body, ih->ih_key.k_dir_id,
1670                                     ih->ih_key.k_objectid,
1671                                     INODE_PKEY(dir)->k_dir_id,
1672                                     INODE_PKEY(dir)->k_objectid);
1673         }
1674
1675         /* look for place in the tree for new item */
1676         retval = search_item(sb, &key, path);
1677         if (retval == IO_ERROR) {
1678                 reiserfs_error(sb, "vs-13080",
1679                                "i/o failure occurred creating new directory");
1680                 return -EIO;
1681         }
1682         if (retval == ITEM_FOUND) {
1683                 pathrelse(path);
1684                 reiserfs_warning(sb, "vs-13070",
1685                                  "object with this key exists (%k)",
1686                                  &(ih->ih_key));
1687                 return -EEXIST;
1688         }
1689
1690         /* insert item, that is empty directory item */
1691         return reiserfs_insert_item(th, path, &key, ih, inode, body);
1692 }
1693
1694 /* stat data of object has been inserted, this inserts the item
1695    containing the body of symlink */
1696 static int reiserfs_new_symlink(struct reiserfs_transaction_handle *th, struct inode *inode,    /* Inode of symlink */
1697                                 struct item_head *ih,
1698                                 struct treepath *path, const char *symname,
1699                                 int item_len)
1700 {
1701         struct super_block *sb = th->t_super;
1702         struct cpu_key key;
1703         int retval;
1704
1705         BUG_ON(!th->t_trans_id);
1706
1707         _make_cpu_key(&key, KEY_FORMAT_3_5,
1708                       le32_to_cpu(ih->ih_key.k_dir_id),
1709                       le32_to_cpu(ih->ih_key.k_objectid),
1710                       1, TYPE_DIRECT, 3 /*key length */ );
1711
1712         make_le_item_head(ih, NULL, KEY_FORMAT_3_5, 1, TYPE_DIRECT, item_len,
1713                           0 /*free_space */ );
1714
1715         /* look for place in the tree for new item */
1716         retval = search_item(sb, &key, path);
1717         if (retval == IO_ERROR) {
1718                 reiserfs_error(sb, "vs-13080",
1719                                "i/o failure occurred creating new symlink");
1720                 return -EIO;
1721         }
1722         if (retval == ITEM_FOUND) {
1723                 pathrelse(path);
1724                 reiserfs_warning(sb, "vs-13080",
1725                                  "object with this key exists (%k)",
1726                                  &(ih->ih_key));
1727                 return -EEXIST;
1728         }
1729
1730         /* insert item, that is body of symlink */
1731         return reiserfs_insert_item(th, path, &key, ih, inode, symname);
1732 }
1733
1734 /* inserts the stat data into the tree, and then calls
1735    reiserfs_new_directory (to insert ".", ".." item if new object is
1736    directory) or reiserfs_new_symlink (to insert symlink body if new
1737    object is symlink) or nothing (if new object is regular file)
1738
1739    NOTE! uid and gid must already be set in the inode.  If we return
1740    non-zero due to an error, we have to drop the quota previously allocated
1741    for the fresh inode.  This can only be done outside a transaction, so
1742    if we return non-zero, we also end the transaction.  */
1743 int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
1744                        struct inode *dir, int mode, const char *symname,
1745                        /* 0 for regular, EMTRY_DIR_SIZE for dirs,
1746                           strlen (symname) for symlinks) */
1747                        loff_t i_size, struct dentry *dentry,
1748                        struct inode *inode,
1749                        struct reiserfs_security_handle *security)
1750 {
1751         struct super_block *sb;
1752         struct reiserfs_iget_args args;
1753         INITIALIZE_PATH(path_to_key);
1754         struct cpu_key key;
1755         struct item_head ih;
1756         struct stat_data sd;
1757         int retval;
1758         int err;
1759
1760         BUG_ON(!th->t_trans_id);
1761
1762         if (vfs_dq_alloc_inode(inode)) {
1763                 err = -EDQUOT;
1764                 goto out_end_trans;
1765         }
1766         if (!dir->i_nlink) {
1767                 err = -EPERM;
1768                 goto out_bad_inode;
1769         }
1770
1771         sb = dir->i_sb;
1772
1773         /* item head of new item */
1774         ih.ih_key.k_dir_id = reiserfs_choose_packing(dir);
1775         ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th));
1776         if (!ih.ih_key.k_objectid) {
1777                 err = -ENOMEM;
1778                 goto out_bad_inode;
1779         }
1780         args.objectid = inode->i_ino = le32_to_cpu(ih.ih_key.k_objectid);
1781         if (old_format_only(sb))
1782                 make_le_item_head(&ih, NULL, KEY_FORMAT_3_5, SD_OFFSET,
1783                                   TYPE_STAT_DATA, SD_V1_SIZE, MAX_US_INT);
1784         else
1785                 make_le_item_head(&ih, NULL, KEY_FORMAT_3_6, SD_OFFSET,
1786                                   TYPE_STAT_DATA, SD_SIZE, MAX_US_INT);
1787         memcpy(INODE_PKEY(inode), &(ih.ih_key), KEY_SIZE);
1788         args.dirid = le32_to_cpu(ih.ih_key.k_dir_id);
1789         if (insert_inode_locked4(inode, args.objectid,
1790                              reiserfs_find_actor, &args) < 0) {
1791                 err = -EINVAL;
1792                 goto out_bad_inode;
1793         }
1794         if (old_format_only(sb))
1795                 /* not a perfect generation count, as object ids can be reused, but
1796                  ** this is as good as reiserfs can do right now.
1797                  ** note that the private part of inode isn't filled in yet, we have
1798                  ** to use the directory.
1799                  */
1800                 inode->i_generation = le32_to_cpu(INODE_PKEY(dir)->k_objectid);
1801         else
1802 #if defined( USE_INODE_GENERATION_COUNTER )
1803                 inode->i_generation =
1804                     le32_to_cpu(REISERFS_SB(sb)->s_rs->s_inode_generation);
1805 #else
1806                 inode->i_generation = ++event;
1807 #endif
1808
1809         /* fill stat data */
1810         inode->i_nlink = (S_ISDIR(mode) ? 2 : 1);
1811
1812         /* uid and gid must already be set by the caller for quota init */
1813
1814         /* symlink cannot be immutable or append only, right? */
1815         if (S_ISLNK(inode->i_mode))
1816                 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND);
1817
1818         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
1819         inode->i_size = i_size;
1820         inode->i_blocks = 0;
1821         inode->i_bytes = 0;
1822         REISERFS_I(inode)->i_first_direct_byte = S_ISLNK(mode) ? 1 :
1823             U32_MAX /*NO_BYTES_IN_DIRECT_ITEM */ ;
1824
1825         INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list));
1826         REISERFS_I(inode)->i_flags = 0;
1827         REISERFS_I(inode)->i_prealloc_block = 0;
1828         REISERFS_I(inode)->i_prealloc_count = 0;
1829         REISERFS_I(inode)->i_trans_id = 0;
1830         REISERFS_I(inode)->i_jl = NULL;
1831         REISERFS_I(inode)->i_attrs =
1832             REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK;
1833         sd_attrs_to_i_attrs(REISERFS_I(inode)->i_attrs, inode);
1834         mutex_init(&(REISERFS_I(inode)->i_mmap));
1835         reiserfs_init_xattr_rwsem(inode);
1836
1837         /* key to search for correct place for new stat data */
1838         _make_cpu_key(&key, KEY_FORMAT_3_6, le32_to_cpu(ih.ih_key.k_dir_id),
1839                       le32_to_cpu(ih.ih_key.k_objectid), SD_OFFSET,
1840                       TYPE_STAT_DATA, 3 /*key length */ );
1841
1842         /* find proper place for inserting of stat data */
1843         retval = search_item(sb, &key, &path_to_key);
1844         if (retval == IO_ERROR) {
1845                 err = -EIO;
1846                 goto out_bad_inode;
1847         }
1848         if (retval == ITEM_FOUND) {
1849                 pathrelse(&path_to_key);
1850                 err = -EEXIST;
1851                 goto out_bad_inode;
1852         }
1853         if (old_format_only(sb)) {
1854                 if (inode->i_uid & ~0xffff || inode->i_gid & ~0xffff) {
1855                         pathrelse(&path_to_key);
1856                         /* i_uid or i_gid is too big to be stored in stat data v3.5 */
1857                         err = -EINVAL;
1858                         goto out_bad_inode;
1859                 }
1860                 inode2sd_v1(&sd, inode, inode->i_size);
1861         } else {
1862                 inode2sd(&sd, inode, inode->i_size);
1863         }
1864         // store in in-core inode the key of stat data and version all
1865         // object items will have (directory items will have old offset
1866         // format, other new objects will consist of new items)
1867         if (old_format_only(sb) || S_ISDIR(mode) || S_ISLNK(mode))
1868                 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1869         else
1870                 set_inode_item_key_version(inode, KEY_FORMAT_3_6);
1871         if (old_format_only(sb))
1872                 set_inode_sd_version(inode, STAT_DATA_V1);
1873         else
1874                 set_inode_sd_version(inode, STAT_DATA_V2);
1875
1876         /* insert the stat data into the tree */
1877 #ifdef DISPLACE_NEW_PACKING_LOCALITIES
1878         if (REISERFS_I(dir)->new_packing_locality)
1879                 th->displace_new_blocks = 1;
1880 #endif
1881         retval =
1882             reiserfs_insert_item(th, &path_to_key, &key, &ih, inode,
1883                                  (char *)(&sd));
1884         if (retval) {
1885                 err = retval;
1886                 reiserfs_check_path(&path_to_key);
1887                 goto out_bad_inode;
1888         }
1889 #ifdef DISPLACE_NEW_PACKING_LOCALITIES
1890         if (!th->displace_new_blocks)
1891                 REISERFS_I(dir)->new_packing_locality = 0;
1892 #endif
1893         if (S_ISDIR(mode)) {
1894                 /* insert item with "." and ".." */
1895                 retval =
1896                     reiserfs_new_directory(th, inode, &ih, &path_to_key, dir);
1897         }
1898
1899         if (S_ISLNK(mode)) {
1900                 /* insert body of symlink */
1901                 if (!old_format_only(sb))
1902                         i_size = ROUND_UP(i_size);
1903                 retval =
1904                     reiserfs_new_symlink(th, inode, &ih, &path_to_key, symname,
1905                                          i_size);
1906         }
1907         if (retval) {
1908                 err = retval;
1909                 reiserfs_check_path(&path_to_key);
1910                 journal_end(th, th->t_super, th->t_blocks_allocated);
1911                 goto out_inserted_sd;
1912         }
1913
1914         if (reiserfs_posixacl(inode->i_sb)) {
1915                 retval = reiserfs_inherit_default_acl(th, dir, dentry, inode);
1916                 if (retval) {
1917                         err = retval;
1918                         reiserfs_check_path(&path_to_key);
1919                         journal_end(th, th->t_super, th->t_blocks_allocated);
1920                         goto out_inserted_sd;
1921                 }
1922         } else if (inode->i_sb->s_flags & MS_POSIXACL) {
1923                 reiserfs_warning(inode->i_sb, "jdm-13090",
1924                                  "ACLs aren't enabled in the fs, "
1925                                  "but vfs thinks they are!");
1926         } else if (IS_PRIVATE(dir))
1927                 inode->i_flags |= S_PRIVATE;
1928
1929         if (security->name) {
1930                 retval = reiserfs_security_write(th, inode, security);
1931                 if (retval) {
1932                         err = retval;
1933                         reiserfs_check_path(&path_to_key);
1934                         retval = journal_end(th, th->t_super,
1935                                              th->t_blocks_allocated);
1936                         if (retval)
1937                                 err = retval;
1938                         goto out_inserted_sd;
1939                 }
1940         }
1941
1942         reiserfs_update_sd(th, inode);
1943         reiserfs_check_path(&path_to_key);
1944
1945         return 0;
1946
1947 /* it looks like you can easily compress these two goto targets into
1948  * one.  Keeping it like this doesn't actually hurt anything, and they
1949  * are place holders for what the quota code actually needs.
1950  */
1951       out_bad_inode:
1952         /* Invalidate the object, nothing was inserted yet */
1953         INODE_PKEY(inode)->k_objectid = 0;
1954
1955         /* Quota change must be inside a transaction for journaling */
1956         vfs_dq_free_inode(inode);
1957
1958       out_end_trans:
1959         journal_end(th, th->t_super, th->t_blocks_allocated);
1960         /* Drop can be outside and it needs more credits so it's better to have it outside */
1961         vfs_dq_drop(inode);
1962         inode->i_flags |= S_NOQUOTA;
1963         make_bad_inode(inode);
1964
1965       out_inserted_sd:
1966         inode->i_nlink = 0;
1967         th->t_trans_id = 0;     /* so the caller can't use this handle later */
1968         unlock_new_inode(inode); /* OK to do even if we hadn't locked it */
1969         iput(inode);
1970         return err;
1971 }
1972
1973 /*
1974 ** finds the tail page in the page cache,
1975 ** reads the last block in.
1976 **
1977 ** On success, page_result is set to a locked, pinned page, and bh_result
1978 ** is set to an up to date buffer for the last block in the file.  returns 0.
1979 **
1980 ** tail conversion is not done, so bh_result might not be valid for writing
1981 ** check buffer_mapped(bh_result) and bh_result->b_blocknr != 0 before
1982 ** trying to write the block.
1983 **
1984 ** on failure, nonzero is returned, page_result and bh_result are untouched.
1985 */
1986 static int grab_tail_page(struct inode *inode,
1987                           struct page **page_result,
1988                           struct buffer_head **bh_result)
1989 {
1990
1991         /* we want the page with the last byte in the file,
1992          ** not the page that will hold the next byte for appending
1993          */
1994         unsigned long index = (inode->i_size - 1) >> PAGE_CACHE_SHIFT;
1995         unsigned long pos = 0;
1996         unsigned long start = 0;
1997         unsigned long blocksize = inode->i_sb->s_blocksize;
1998         unsigned long offset = (inode->i_size) & (PAGE_CACHE_SIZE - 1);
1999         struct buffer_head *bh;
2000         struct buffer_head *head;
2001         struct page *page;
2002         int error;
2003
2004         /* we know that we are only called with inode->i_size > 0.
2005          ** we also know that a file tail can never be as big as a block
2006          ** If i_size % blocksize == 0, our file is currently block aligned
2007          ** and it won't need converting or zeroing after a truncate.
2008          */
2009         if ((offset & (blocksize - 1)) == 0) {
2010                 return -ENOENT;
2011         }
2012         page = grab_cache_page(inode->i_mapping, index);
2013         error = -ENOMEM;
2014         if (!page) {
2015                 goto out;
2016         }
2017         /* start within the page of the last block in the file */
2018         start = (offset / blocksize) * blocksize;
2019
2020         error = block_prepare_write(page, start, offset,
2021                                     reiserfs_get_block_create_0);
2022         if (error)
2023                 goto unlock;
2024
2025         head = page_buffers(page);
2026         bh = head;
2027         do {
2028                 if (pos >= start) {
2029                         break;
2030                 }
2031                 bh = bh->b_this_page;
2032                 pos += blocksize;
2033         } while (bh != head);
2034
2035         if (!buffer_uptodate(bh)) {
2036                 /* note, this should never happen, prepare_write should
2037                  ** be taking care of this for us.  If the buffer isn't up to date,
2038                  ** I've screwed up the code to find the buffer, or the code to
2039                  ** call prepare_write
2040                  */
2041                 reiserfs_error(inode->i_sb, "clm-6000",
2042                                "error reading block %lu", bh->b_blocknr);
2043                 error = -EIO;
2044                 goto unlock;
2045         }
2046         *bh_result = bh;
2047         *page_result = page;
2048
2049       out:
2050         return error;
2051
2052       unlock:
2053         unlock_page(page);
2054         page_cache_release(page);
2055         return error;
2056 }
2057
2058 /*
2059 ** vfs version of truncate file.  Must NOT be called with
2060 ** a transaction already started.
2061 **
2062 ** some code taken from block_truncate_page
2063 */
2064 int reiserfs_truncate_file(struct inode *inode, int update_timestamps)
2065 {
2066         struct reiserfs_transaction_handle th;
2067         /* we want the offset for the first byte after the end of the file */
2068         unsigned long offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
2069         unsigned blocksize = inode->i_sb->s_blocksize;
2070         unsigned length;
2071         struct page *page = NULL;
2072         int error;
2073         struct buffer_head *bh = NULL;
2074         int err2;
2075
2076         reiserfs_write_lock(inode->i_sb);
2077
2078         if (inode->i_size > 0) {
2079                 error = grab_tail_page(inode, &page, &bh);
2080                 if (error) {
2081                         // -ENOENT means we truncated past the end of the file,
2082                         // and get_block_create_0 could not find a block to read in,
2083                         // which is ok.
2084                         if (error != -ENOENT)
2085                                 reiserfs_error(inode->i_sb, "clm-6001",
2086                                                "grab_tail_page failed %d",
2087                                                error);
2088                         page = NULL;
2089                         bh = NULL;
2090                 }
2091         }
2092
2093         /* so, if page != NULL, we have a buffer head for the offset at
2094          ** the end of the file. if the bh is mapped, and bh->b_blocknr != 0,
2095          ** then we have an unformatted node.  Otherwise, we have a direct item,
2096          ** and no zeroing is required on disk.  We zero after the truncate,
2097          ** because the truncate might pack the item anyway
2098          ** (it will unmap bh if it packs).
2099          */
2100         /* it is enough to reserve space in transaction for 2 balancings:
2101            one for "save" link adding and another for the first
2102            cut_from_item. 1 is for update_sd */
2103         error = journal_begin(&th, inode->i_sb,
2104                               JOURNAL_PER_BALANCE_CNT * 2 + 1);
2105         if (error)
2106                 goto out;
2107         reiserfs_update_inode_transaction(inode);
2108         if (update_timestamps)
2109                 /* we are doing real truncate: if the system crashes before the last
2110                    transaction of truncating gets committed - on reboot the file
2111                    either appears truncated properly or not truncated at all */
2112                 add_save_link(&th, inode, 1);
2113         err2 = reiserfs_do_truncate(&th, inode, page, update_timestamps);
2114         error =
2115             journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT * 2 + 1);
2116         if (error)
2117                 goto out;
2118
2119         /* check reiserfs_do_truncate after ending the transaction */
2120         if (err2) {
2121                 error = err2;
2122                 goto out;
2123         }
2124
2125         if (update_timestamps) {
2126                 error = remove_save_link(inode, 1 /* truncate */);
2127                 if (error)
2128                         goto out;
2129         }
2130
2131         if (page) {
2132                 length = offset & (blocksize - 1);
2133                 /* if we are not on a block boundary */
2134                 if (length) {
2135                         length = blocksize - length;
2136                         zero_user(page, offset, length);
2137                         if (buffer_mapped(bh) && bh->b_blocknr != 0) {
2138                                 mark_buffer_dirty(bh);
2139                         }
2140                 }
2141                 unlock_page(page);
2142                 page_cache_release(page);
2143         }
2144
2145         reiserfs_write_unlock(inode->i_sb);
2146         return 0;
2147       out:
2148         if (page) {
2149                 unlock_page(page);
2150                 page_cache_release(page);
2151         }
2152         reiserfs_write_unlock(inode->i_sb);
2153         return error;
2154 }
2155
2156 static int map_block_for_writepage(struct inode *inode,
2157                                    struct buffer_head *bh_result,
2158                                    unsigned long block)
2159 {
2160         struct reiserfs_transaction_handle th;
2161         int fs_gen;
2162         struct item_head tmp_ih;
2163         struct item_head *ih;
2164         struct buffer_head *bh;
2165         __le32 *item;
2166         struct cpu_key key;
2167         INITIALIZE_PATH(path);
2168         int pos_in_item;
2169         int jbegin_count = JOURNAL_PER_BALANCE_CNT;
2170         loff_t byte_offset = ((loff_t)block << inode->i_sb->s_blocksize_bits)+1;
2171         int retval;
2172         int use_get_block = 0;
2173         int bytes_copied = 0;
2174         int copy_size;
2175         int trans_running = 0;
2176
2177         /* catch places below that try to log something without starting a trans */
2178         th.t_trans_id = 0;
2179
2180         if (!buffer_uptodate(bh_result)) {
2181                 return -EIO;
2182         }
2183
2184         kmap(bh_result->b_page);
2185       start_over:
2186         reiserfs_write_lock(inode->i_sb);
2187         make_cpu_key(&key, inode, byte_offset, TYPE_ANY, 3);
2188
2189       research:
2190         retval = search_for_position_by_key(inode->i_sb, &key, &path);
2191         if (retval != POSITION_FOUND) {
2192                 use_get_block = 1;
2193                 goto out;
2194         }
2195
2196         bh = get_last_bh(&path);
2197         ih = get_ih(&path);
2198         item = get_item(&path);
2199         pos_in_item = path.pos_in_item;
2200
2201         /* we've found an unformatted node */
2202         if (indirect_item_found(retval, ih)) {
2203                 if (bytes_copied > 0) {
2204                         reiserfs_warning(inode->i_sb, "clm-6002",
2205                                          "bytes_copied %d", bytes_copied);
2206                 }
2207                 if (!get_block_num(item, pos_in_item)) {
2208                         /* crap, we are writing to a hole */
2209                         use_get_block = 1;
2210                         goto out;
2211                 }
2212                 set_block_dev_mapped(bh_result,
2213                                      get_block_num(item, pos_in_item), inode);
2214         } else if (is_direct_le_ih(ih)) {
2215                 char *p;
2216                 p = page_address(bh_result->b_page);
2217                 p += (byte_offset - 1) & (PAGE_CACHE_SIZE - 1);
2218                 copy_size = ih_item_len(ih) - pos_in_item;
2219
2220                 fs_gen = get_generation(inode->i_sb);
2221                 copy_item_head(&tmp_ih, ih);
2222
2223                 if (!trans_running) {
2224                         /* vs-3050 is gone, no need to drop the path */
2225                         retval = journal_begin(&th, inode->i_sb, jbegin_count);
2226                         if (retval)
2227                                 goto out;
2228                         reiserfs_update_inode_transaction(inode);
2229                         trans_running = 1;
2230                         if (fs_changed(fs_gen, inode->i_sb)
2231                             && item_moved(&tmp_ih, &path)) {
2232                                 reiserfs_restore_prepared_buffer(inode->i_sb,
2233                                                                  bh);
2234                                 goto research;
2235                         }
2236                 }
2237
2238                 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
2239
2240                 if (fs_changed(fs_gen, inode->i_sb)
2241                     && item_moved(&tmp_ih, &path)) {
2242                         reiserfs_restore_prepared_buffer(inode->i_sb, bh);
2243                         goto research;
2244                 }
2245
2246                 memcpy(B_I_PITEM(bh, ih) + pos_in_item, p + bytes_copied,
2247                        copy_size);
2248
2249                 journal_mark_dirty(&th, inode->i_sb, bh);
2250                 bytes_copied += copy_size;
2251                 set_block_dev_mapped(bh_result, 0, inode);
2252
2253                 /* are there still bytes left? */
2254                 if (bytes_copied < bh_result->b_size &&
2255                     (byte_offset + bytes_copied) < inode->i_size) {
2256                         set_cpu_key_k_offset(&key,
2257                                              cpu_key_k_offset(&key) +
2258                                              copy_size);
2259                         goto research;
2260                 }
2261         } else {
2262                 reiserfs_warning(inode->i_sb, "clm-6003",
2263                                  "bad item inode %lu", inode->i_ino);
2264                 retval = -EIO;
2265                 goto out;
2266         }
2267         retval = 0;
2268
2269       out:
2270         pathrelse(&path);
2271         if (trans_running) {
2272                 int err = journal_end(&th, inode->i_sb, jbegin_count);
2273                 if (err)
2274                         retval = err;
2275                 trans_running = 0;
2276         }
2277         reiserfs_write_unlock(inode->i_sb);
2278
2279         /* this is where we fill in holes in the file. */
2280         if (use_get_block) {
2281                 retval = reiserfs_get_block(inode, block, bh_result,
2282                                             GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
2283                                             | GET_BLOCK_NO_DANGLE);
2284                 if (!retval) {
2285                         if (!buffer_mapped(bh_result)
2286                             || bh_result->b_blocknr == 0) {
2287                                 /* get_block failed to find a mapped unformatted node. */
2288                                 use_get_block = 0;
2289                                 goto start_over;
2290                         }
2291                 }
2292         }
2293         kunmap(bh_result->b_page);
2294
2295         if (!retval && buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
2296                 /* we've copied data from the page into the direct item, so the
2297                  * buffer in the page is now clean, mark it to reflect that.
2298                  */
2299                 lock_buffer(bh_result);
2300                 clear_buffer_dirty(bh_result);
2301                 unlock_buffer(bh_result);
2302         }
2303         return retval;
2304 }
2305
2306 /*
2307  * mason@suse.com: updated in 2.5.54 to follow the same general io
2308  * start/recovery path as __block_write_full_page, along with special
2309  * code to handle reiserfs tails.
2310  */
2311 static int reiserfs_write_full_page(struct page *page,
2312                                     struct writeback_control *wbc)
2313 {
2314         struct inode *inode = page->mapping->host;
2315         unsigned long end_index = inode->i_size >> PAGE_CACHE_SHIFT;
2316         int error = 0;
2317         unsigned long block;
2318         sector_t last_block;
2319         struct buffer_head *head, *bh;
2320         int partial = 0;
2321         int nr = 0;
2322         int checked = PageChecked(page);
2323         struct reiserfs_transaction_handle th;
2324         struct super_block *s = inode->i_sb;
2325         int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
2326         th.t_trans_id = 0;
2327
2328         /* no logging allowed when nonblocking or from PF_MEMALLOC */
2329         if (checked && (current->flags & PF_MEMALLOC)) {
2330                 redirty_page_for_writepage(wbc, page);
2331                 unlock_page(page);
2332                 return 0;
2333         }
2334
2335         /* The page dirty bit is cleared before writepage is called, which
2336          * means we have to tell create_empty_buffers to make dirty buffers
2337          * The page really should be up to date at this point, so tossing
2338          * in the BH_Uptodate is just a sanity check.
2339          */
2340         if (!page_has_buffers(page)) {
2341                 create_empty_buffers(page, s->s_blocksize,
2342                                      (1 << BH_Dirty) | (1 << BH_Uptodate));
2343         }
2344         head = page_buffers(page);
2345
2346         /* last page in the file, zero out any contents past the
2347          ** last byte in the file
2348          */
2349         if (page->index >= end_index) {
2350                 unsigned last_offset;
2351
2352                 last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
2353                 /* no file contents in this page */
2354                 if (page->index >= end_index + 1 || !last_offset) {
2355                         unlock_page(page);
2356                         return 0;
2357                 }
2358                 zero_user_segment(page, last_offset, PAGE_CACHE_SIZE);
2359         }
2360         bh = head;
2361         block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits);
2362         last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
2363         /* first map all the buffers, logging any direct items we find */
2364         do {
2365                 if (block > last_block) {
2366                         /*
2367                          * This can happen when the block size is less than
2368                          * the page size.  The corresponding bytes in the page
2369                          * were zero filled above
2370                          */
2371                         clear_buffer_dirty(bh);
2372                         set_buffer_uptodate(bh);
2373                 } else if ((checked || buffer_dirty(bh)) &&
2374                            (!buffer_mapped(bh) || (buffer_mapped(bh)
2375                                                        && bh->b_blocknr ==
2376                                                        0))) {
2377                         /* not mapped yet, or it points to a direct item, search
2378                          * the btree for the mapping info, and log any direct
2379                          * items found
2380                          */
2381                         if ((error = map_block_for_writepage(inode, bh, block))) {
2382                                 goto fail;
2383                         }
2384                 }
2385                 bh = bh->b_this_page;
2386                 block++;
2387         } while (bh != head);
2388
2389         /*
2390          * we start the transaction after map_block_for_writepage,
2391          * because it can create holes in the file (an unbounded operation).
2392          * starting it here, we can make a reliable estimate for how many
2393          * blocks we're going to log
2394          */
2395         if (checked) {
2396                 ClearPageChecked(page);
2397                 reiserfs_write_lock(s);
2398                 error = journal_begin(&th, s, bh_per_page + 1);
2399                 if (error) {
2400                         reiserfs_write_unlock(s);
2401                         goto fail;
2402                 }
2403                 reiserfs_update_inode_transaction(inode);
2404         }
2405         /* now go through and lock any dirty buffers on the page */
2406         do {
2407                 get_bh(bh);
2408                 if (!buffer_mapped(bh))
2409                         continue;
2410                 if (buffer_mapped(bh) && bh->b_blocknr == 0)
2411                         continue;
2412
2413                 if (checked) {
2414                         reiserfs_prepare_for_journal(s, bh, 1);
2415                         journal_mark_dirty(&th, s, bh);
2416                         continue;
2417                 }
2418                 /* from this point on, we know the buffer is mapped to a
2419                  * real block and not a direct item
2420                  */
2421                 if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
2422                         lock_buffer(bh);
2423                 } else {
2424                         if (!trylock_buffer(bh)) {
2425                                 redirty_page_for_writepage(wbc, page);
2426                                 continue;
2427                         }
2428                 }
2429                 if (test_clear_buffer_dirty(bh)) {
2430                         mark_buffer_async_write(bh);
2431                 } else {
2432                         unlock_buffer(bh);
2433                 }
2434         } while ((bh = bh->b_this_page) != head);
2435
2436         if (checked) {
2437                 error = journal_end(&th, s, bh_per_page + 1);
2438                 reiserfs_write_unlock(s);
2439                 if (error)
2440                         goto fail;
2441         }
2442         BUG_ON(PageWriteback(page));
2443         set_page_writeback(page);
2444         unlock_page(page);
2445
2446         /*
2447          * since any buffer might be the only dirty buffer on the page,
2448          * the first submit_bh can bring the page out of writeback.
2449          * be careful with the buffers.
2450          */
2451         do {
2452                 struct buffer_head *next = bh->b_this_page;
2453                 if (buffer_async_write(bh)) {
2454                         submit_bh(WRITE, bh);
2455                         nr++;
2456                 }
2457                 put_bh(bh);
2458                 bh = next;
2459         } while (bh != head);
2460
2461         error = 0;
2462       done:
2463         if (nr == 0) {
2464                 /*
2465                  * if this page only had a direct item, it is very possible for
2466                  * no io to be required without there being an error.  Or,
2467                  * someone else could have locked them and sent them down the
2468                  * pipe without locking the page
2469                  */
2470                 bh = head;
2471                 do {
2472                         if (!buffer_uptodate(bh)) {
2473                                 partial = 1;
2474                                 break;
2475                         }
2476                         bh = bh->b_this_page;
2477                 } while (bh != head);
2478                 if (!partial)
2479                         SetPageUptodate(page);
2480                 end_page_writeback(page);
2481         }
2482         return error;
2483
2484       fail:
2485         /* catches various errors, we need to make sure any valid dirty blocks
2486          * get to the media.  The page is currently locked and not marked for
2487          * writeback
2488          */
2489         ClearPageUptodate(page);
2490         bh = head;
2491         do {
2492                 get_bh(bh);
2493                 if (buffer_mapped(bh) && buffer_dirty(bh) && bh->b_blocknr) {
2494                         lock_buffer(bh);
2495                         mark_buffer_async_write(bh);
2496                 } else {
2497                         /*
2498                          * clear any dirty bits that might have come from getting
2499                          * attached to a dirty page
2500                          */
2501                         clear_buffer_dirty(bh);
2502                 }
2503                 bh = bh->b_this_page;
2504         } while (bh != head);
2505         SetPageError(page);
2506         BUG_ON(PageWriteback(page));
2507         set_page_writeback(page);
2508         unlock_page(page);
2509         do {
2510                 struct buffer_head *next = bh->b_this_page;
2511                 if (buffer_async_write(bh)) {
2512                         clear_buffer_dirty(bh);
2513                         submit_bh(WRITE, bh);
2514                         nr++;
2515                 }
2516                 put_bh(bh);
2517                 bh = next;
2518         } while (bh != head);
2519         goto done;
2520 }
2521
2522 static int reiserfs_readpage(struct file *f, struct page *page)
2523 {
2524         return block_read_full_page(page, reiserfs_get_block);
2525 }
2526
2527 static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
2528 {
2529         struct inode *inode = page->mapping->host;
2530         reiserfs_wait_on_write_block(inode->i_sb);
2531         return reiserfs_write_full_page(page, wbc);
2532 }
2533
2534 static int reiserfs_write_begin(struct file *file,
2535                                 struct address_space *mapping,
2536                                 loff_t pos, unsigned len, unsigned flags,
2537                                 struct page **pagep, void **fsdata)
2538 {
2539         struct inode *inode;
2540         struct page *page;
2541         pgoff_t index;
2542         int ret;
2543         int old_ref = 0;
2544
2545         inode = mapping->host;
2546         *fsdata = 0;
2547         if (flags & AOP_FLAG_CONT_EXPAND &&
2548             (pos & (inode->i_sb->s_blocksize - 1)) == 0) {
2549                 pos ++;
2550                 *fsdata = (void *)(unsigned long)flags;
2551         }
2552
2553         index = pos >> PAGE_CACHE_SHIFT;
2554         page = grab_cache_page_write_begin(mapping, index, flags);
2555         if (!page)
2556                 return -ENOMEM;
2557         *pagep = page;
2558
2559         reiserfs_wait_on_write_block(inode->i_sb);
2560         fix_tail_page_for_writing(page);
2561         if (reiserfs_transaction_running(inode->i_sb)) {
2562                 struct reiserfs_transaction_handle *th;
2563                 th = (struct reiserfs_transaction_handle *)current->
2564                     journal_info;
2565                 BUG_ON(!th->t_refcount);
2566                 BUG_ON(!th->t_trans_id);
2567                 old_ref = th->t_refcount;
2568                 th->t_refcount++;
2569         }
2570         ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
2571                                 reiserfs_get_block);
2572         if (ret && reiserfs_transaction_running(inode->i_sb)) {
2573                 struct reiserfs_transaction_handle *th = current->journal_info;
2574                 /* this gets a little ugly.  If reiserfs_get_block returned an
2575                  * error and left a transacstion running, we've got to close it,
2576                  * and we've got to free handle if it was a persistent transaction.
2577                  *
2578                  * But, if we had nested into an existing transaction, we need
2579                  * to just drop the ref count on the handle.
2580                  *
2581                  * If old_ref == 0, the transaction is from reiserfs_get_block,
2582                  * and it was a persistent trans.  Otherwise, it was nested above.
2583                  */
2584                 if (th->t_refcount > old_ref) {
2585                         if (old_ref)
2586                                 th->t_refcount--;
2587                         else {
2588                                 int err;
2589                                 reiserfs_write_lock(inode->i_sb);
2590                                 err = reiserfs_end_persistent_transaction(th);
2591                                 reiserfs_write_unlock(inode->i_sb);
2592                                 if (err)
2593                                         ret = err;
2594                         }
2595                 }
2596         }
2597         if (ret) {
2598                 unlock_page(page);
2599                 page_cache_release(page);
2600         }
2601         return ret;
2602 }
2603
2604 int reiserfs_prepare_write(struct file *f, struct page *page,
2605                            unsigned from, unsigned to)
2606 {
2607         struct inode *inode = page->mapping->host;
2608         int ret;
2609         int old_ref = 0;
2610
2611         reiserfs_wait_on_write_block(inode->i_sb);
2612         fix_tail_page_for_writing(page);
2613         if (reiserfs_transaction_running(inode->i_sb)) {
2614                 struct reiserfs_transaction_handle *th;
2615                 th = (struct reiserfs_transaction_handle *)current->
2616                     journal_info;
2617                 BUG_ON(!th->t_refcount);
2618                 BUG_ON(!th->t_trans_id);
2619                 old_ref = th->t_refcount;
2620                 th->t_refcount++;
2621         }
2622
2623         ret = block_prepare_write(page, from, to, reiserfs_get_block);
2624         if (ret && reiserfs_transaction_running(inode->i_sb)) {
2625                 struct reiserfs_transaction_handle *th = current->journal_info;
2626                 /* this gets a little ugly.  If reiserfs_get_block returned an
2627                  * error and left a transacstion running, we've got to close it,
2628                  * and we've got to free handle if it was a persistent transaction.
2629                  *
2630                  * But, if we had nested into an existing transaction, we need
2631                  * to just drop the ref count on the handle.
2632                  *
2633                  * If old_ref == 0, the transaction is from reiserfs_get_block,
2634                  * and it was a persistent trans.  Otherwise, it was nested above.
2635                  */
2636                 if (th->t_refcount > old_ref) {
2637                         if (old_ref)
2638                                 th->t_refcount--;
2639                         else {
2640                                 int err;
2641                                 reiserfs_write_lock(inode->i_sb);
2642                                 err = reiserfs_end_persistent_transaction(th);
2643                                 reiserfs_write_unlock(inode->i_sb);
2644                                 if (err)
2645                                         ret = err;
2646                         }
2647                 }
2648         }
2649         return ret;
2650
2651 }
2652
2653 static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block)
2654 {
2655         return generic_block_bmap(as, block, reiserfs_bmap);
2656 }
2657
2658 static int reiserfs_write_end(struct file *file, struct address_space *mapping,
2659                               loff_t pos, unsigned len, unsigned copied,
2660                               struct page *page, void *fsdata)
2661 {
2662         struct inode *inode = page->mapping->host;
2663         int ret = 0;
2664         int update_sd = 0;
2665         struct reiserfs_transaction_handle *th;
2666         unsigned start;
2667
2668         if ((unsigned long)fsdata & AOP_FLAG_CONT_EXPAND)
2669                 pos ++;
2670
2671         reiserfs_wait_on_write_block(inode->i_sb);
2672         if (reiserfs_transaction_running(inode->i_sb))
2673                 th = current->journal_info;
2674         else
2675                 th = NULL;
2676
2677         start = pos & (PAGE_CACHE_SIZE - 1);
2678         if (unlikely(copied < len)) {
2679                 if (!PageUptodate(page))
2680                         copied = 0;
2681
2682                 page_zero_new_buffers(page, start + copied, start + len);
2683         }
2684         flush_dcache_page(page);
2685
2686         reiserfs_commit_page(inode, page, start, start + copied);
2687
2688         /* generic_commit_write does this for us, but does not update the
2689          ** transaction tracking stuff when the size changes.  So, we have
2690          ** to do the i_size updates here.
2691          */
2692         pos += copied;
2693         if (pos > inode->i_size) {
2694                 struct reiserfs_transaction_handle myth;
2695                 reiserfs_write_lock(inode->i_sb);
2696                 /* If the file have grown beyond the border where it
2697                    can have a tail, unmark it as needing a tail
2698                    packing */
2699                 if ((have_large_tails(inode->i_sb)
2700                      && inode->i_size > i_block_size(inode) * 4)
2701                     || (have_small_tails(inode->i_sb)
2702                         && inode->i_size > i_block_size(inode)))
2703                         REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
2704
2705                 ret = journal_begin(&myth, inode->i_sb, 1);
2706                 if (ret) {
2707                         reiserfs_write_unlock(inode->i_sb);
2708                         goto journal_error;
2709                 }
2710                 reiserfs_update_inode_transaction(inode);
2711                 inode->i_size = pos;
2712                 /*
2713                  * this will just nest into our transaction.  It's important
2714                  * to use mark_inode_dirty so the inode gets pushed around on the
2715                  * dirty lists, and so that O_SYNC works as expected
2716                  */
2717                 mark_inode_dirty(inode);
2718                 reiserfs_update_sd(&myth, inode);
2719                 update_sd = 1;
2720                 ret = journal_end(&myth, inode->i_sb, 1);
2721                 reiserfs_write_unlock(inode->i_sb);
2722                 if (ret)
2723                         goto journal_error;
2724         }
2725         if (th) {
2726                 reiserfs_write_lock(inode->i_sb);
2727                 if (!update_sd)
2728                         mark_inode_dirty(inode);
2729                 ret = reiserfs_end_persistent_transaction(th);
2730                 reiserfs_write_unlock(inode->i_sb);
2731                 if (ret)
2732                         goto out;
2733         }
2734
2735       out:
2736         unlock_page(page);
2737         page_cache_release(page);
2738         return ret == 0 ? copied : ret;
2739
2740       journal_error:
2741         if (th) {
2742                 reiserfs_write_lock(inode->i_sb);
2743                 if (!update_sd)
2744                         reiserfs_update_sd(th, inode);
2745                 ret = reiserfs_end_persistent_transaction(th);
2746                 reiserfs_write_unlock(inode->i_sb);
2747         }
2748
2749         goto out;
2750 }
2751
2752 int reiserfs_commit_write(struct file *f, struct page *page,
2753                           unsigned from, unsigned to)
2754 {
2755         struct inode *inode = page->mapping->host;
2756         loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + to;
2757         int ret = 0;
2758         int update_sd = 0;
2759         struct reiserfs_transaction_handle *th = NULL;
2760
2761         reiserfs_wait_on_write_block(inode->i_sb);
2762         if (reiserfs_transaction_running(inode->i_sb)) {
2763                 th = current->journal_info;
2764         }
2765         reiserfs_commit_page(inode, page, from, to);
2766
2767         /* generic_commit_write does this for us, but does not update the
2768          ** transaction tracking stuff when the size changes.  So, we have
2769          ** to do the i_size updates here.
2770          */
2771         if (pos > inode->i_size) {
2772                 struct reiserfs_transaction_handle myth;
2773                 reiserfs_write_lock(inode->i_sb);
2774                 /* If the file have grown beyond the border where it
2775                    can have a tail, unmark it as needing a tail
2776                    packing */
2777                 if ((have_large_tails(inode->i_sb)
2778                      && inode->i_size > i_block_size(inode) * 4)
2779                     || (have_small_tails(inode->i_sb)
2780                         && inode->i_size > i_block_size(inode)))
2781                         REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
2782
2783                 ret = journal_begin(&myth, inode->i_sb, 1);
2784                 if (ret) {
2785                         reiserfs_write_unlock(inode->i_sb);
2786                         goto journal_error;
2787                 }
2788                 reiserfs_update_inode_transaction(inode);
2789                 inode->i_size = pos;
2790                 /*
2791                  * this will just nest into our transaction.  It's important
2792                  * to use mark_inode_dirty so the inode gets pushed around on the
2793                  * dirty lists, and so that O_SYNC works as expected
2794                  */
2795                 mark_inode_dirty(inode);
2796                 reiserfs_update_sd(&myth, inode);
2797                 update_sd = 1;
2798                 ret = journal_end(&myth, inode->i_sb, 1);
2799                 reiserfs_write_unlock(inode->i_sb);
2800                 if (ret)
2801                         goto journal_error;
2802         }
2803         if (th) {
2804                 reiserfs_write_lock(inode->i_sb);
2805                 if (!update_sd)
2806                         mark_inode_dirty(inode);
2807                 ret = reiserfs_end_persistent_transaction(th);
2808                 reiserfs_write_unlock(inode->i_sb);
2809                 if (ret)
2810                         goto out;
2811         }
2812
2813       out:
2814         return ret;
2815
2816       journal_error:
2817         if (th) {
2818                 reiserfs_write_lock(inode->i_sb);
2819                 if (!update_sd)
2820                         reiserfs_update_sd(th, inode);
2821                 ret = reiserfs_end_persistent_transaction(th);
2822                 reiserfs_write_unlock(inode->i_sb);
2823         }
2824
2825         return ret;
2826 }
2827
2828 void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode)
2829 {
2830         if (reiserfs_attrs(inode->i_sb)) {
2831                 if (sd_attrs & REISERFS_SYNC_FL)
2832                         inode->i_flags |= S_SYNC;
2833                 else
2834                         inode->i_flags &= ~S_SYNC;
2835                 if (sd_attrs & REISERFS_IMMUTABLE_FL)
2836                         inode->i_flags |= S_IMMUTABLE;
2837                 else
2838                         inode->i_flags &= ~S_IMMUTABLE;
2839                 if (sd_attrs & REISERFS_APPEND_FL)
2840                         inode->i_flags |= S_APPEND;
2841                 else
2842                         inode->i_flags &= ~S_APPEND;
2843                 if (sd_attrs & REISERFS_NOATIME_FL)
2844                         inode->i_flags |= S_NOATIME;
2845                 else
2846                         inode->i_flags &= ~S_NOATIME;
2847                 if (sd_attrs & REISERFS_NOTAIL_FL)
2848                         REISERFS_I(inode)->i_flags |= i_nopack_mask;
2849                 else
2850                         REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
2851         }
2852 }
2853
2854 void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs)
2855 {
2856         if (reiserfs_attrs(inode->i_sb)) {
2857                 if (inode->i_flags & S_IMMUTABLE)
2858                         *sd_attrs |= REISERFS_IMMUTABLE_FL;
2859                 else
2860                         *sd_attrs &= ~REISERFS_IMMUTABLE_FL;
2861                 if (inode->i_flags & S_SYNC)
2862                         *sd_attrs |= REISERFS_SYNC_FL;
2863                 else
2864                         *sd_attrs &= ~REISERFS_SYNC_FL;
2865                 if (inode->i_flags & S_NOATIME)
2866                         *sd_attrs |= REISERFS_NOATIME_FL;
2867                 else
2868                         *sd_attrs &= ~REISERFS_NOATIME_FL;
2869                 if (REISERFS_I(inode)->i_flags & i_nopack_mask)
2870                         *sd_attrs |= REISERFS_NOTAIL_FL;
2871                 else
2872                         *sd_attrs &= ~REISERFS_NOTAIL_FL;
2873         }
2874 }
2875
2876 /* decide if this buffer needs to stay around for data logging or ordered
2877 ** write purposes
2878 */
2879 static int invalidatepage_can_drop(struct inode *inode, struct buffer_head *bh)
2880 {
2881         int ret = 1;
2882         struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
2883
2884         lock_buffer(bh);
2885         spin_lock(&j->j_dirty_buffers_lock);
2886         if (!buffer_mapped(bh)) {
2887                 goto free_jh;
2888         }
2889         /* the page is locked, and the only places that log a data buffer
2890          * also lock the page.
2891          */
2892         if (reiserfs_file_data_log(inode)) {
2893                 /*
2894                  * very conservative, leave the buffer pinned if
2895                  * anyone might need it.
2896                  */
2897                 if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
2898                         ret = 0;
2899                 }
2900         } else  if (buffer_dirty(bh)) {
2901                 struct reiserfs_journal_list *jl;
2902                 struct reiserfs_jh *jh = bh->b_private;
2903
2904                 /* why is this safe?
2905                  * reiserfs_setattr updates i_size in the on disk
2906                  * stat data before allowing vmtruncate to be called.
2907                  *
2908                  * If buffer was put onto the ordered list for this
2909                  * transaction, we know for sure either this transaction
2910                  * or an older one already has updated i_size on disk,
2911                  * and this ordered data won't be referenced in the file
2912                  * if we crash.
2913                  *
2914                  * if the buffer was put onto the ordered list for an older
2915                  * transaction, we need to leave it around
2916                  */
2917                 if (jh && (jl = jh->jl)
2918                     && jl != SB_JOURNAL(inode->i_sb)->j_current_jl)
2919                         ret = 0;
2920         }
2921       free_jh:
2922         if (ret && bh->b_private) {
2923                 reiserfs_free_jh(bh);
2924         }
2925         spin_unlock(&j->j_dirty_buffers_lock);
2926         unlock_buffer(bh);
2927         return ret;
2928 }
2929
2930 /* clm -- taken from fs/buffer.c:block_invalidate_page */
2931 static void reiserfs_invalidatepage(struct page *page, unsigned long offset)
2932 {
2933         struct buffer_head *head, *bh, *next;
2934         struct inode *inode = page->mapping->host;
2935         unsigned int curr_off = 0;
2936         int ret = 1;
2937
2938         BUG_ON(!PageLocked(page));
2939
2940         if (offset == 0)
2941                 ClearPageChecked(page);
2942
2943         if (!page_has_buffers(page))
2944                 goto out;
2945
2946         head = page_buffers(page);
2947         bh = head;
2948         do {
2949                 unsigned int next_off = curr_off + bh->b_size;
2950                 next = bh->b_this_page;
2951
2952                 /*
2953                  * is this block fully invalidated?
2954                  */
2955                 if (offset <= curr_off) {
2956                         if (invalidatepage_can_drop(inode, bh))
2957                                 reiserfs_unmap_buffer(bh);
2958                         else
2959                                 ret = 0;
2960                 }
2961                 curr_off = next_off;
2962                 bh = next;
2963         } while (bh != head);
2964
2965         /*
2966          * We release buffers only if the entire page is being invalidated.
2967          * The get_block cached value has been unconditionally invalidated,
2968          * so real IO is not possible anymore.
2969          */
2970         if (!offset && ret) {
2971                 ret = try_to_release_page(page, 0);
2972                 /* maybe should BUG_ON(!ret); - neilb */
2973         }
2974       out:
2975         return;
2976 }
2977
2978 static int reiserfs_set_page_dirty(struct page *page)
2979 {
2980         struct inode *inode = page->mapping->host;
2981         if (reiserfs_file_data_log(inode)) {
2982                 SetPageChecked(page);
2983                 return __set_page_dirty_nobuffers(page);
2984         }
2985         return __set_page_dirty_buffers(page);
2986 }
2987
2988 /*
2989  * Returns 1 if the page's buffers were dropped.  The page is locked.
2990  *
2991  * Takes j_dirty_buffers_lock to protect the b_assoc_buffers list_heads
2992  * in the buffers at page_buffers(page).
2993  *
2994  * even in -o notail mode, we can't be sure an old mount without -o notail
2995  * didn't create files with tails.
2996  */
2997 static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags)
2998 {
2999         struct inode *inode = page->mapping->host;
3000         struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
3001         struct buffer_head *head;
3002         struct buffer_head *bh;
3003         int ret = 1;
3004
3005         WARN_ON(PageChecked(page));
3006         spin_lock(&j->j_dirty_buffers_lock);
3007         head = page_buffers(page);
3008         bh = head;
3009         do {
3010                 if (bh->b_private) {
3011                         if (!buffer_dirty(bh) && !buffer_locked(bh)) {
3012                                 reiserfs_free_jh(bh);
3013                         } else {
3014                                 ret = 0;
3015                                 break;
3016                         }
3017                 }
3018                 bh = bh->b_this_page;
3019         } while (bh != head);
3020         if (ret)
3021                 ret = try_to_free_buffers(page);
3022         spin_unlock(&j->j_dirty_buffers_lock);
3023         return ret;
3024 }
3025
3026 /* We thank Mingming Cao for helping us understand in great detail what
3027    to do in this section of the code. */
3028 static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
3029                                   const struct iovec *iov, loff_t offset,
3030                                   unsigned long nr_segs)
3031 {
3032         struct file *file = iocb->ki_filp;
3033         struct inode *inode = file->f_mapping->host;
3034
3035         return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
3036                                   offset, nr_segs,
3037                                   reiserfs_get_blocks_direct_io, NULL);
3038 }
3039
3040 int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
3041 {
3042         struct inode *inode = dentry->d_inode;
3043         int error;
3044         unsigned int ia_valid;
3045
3046         /* must be turned off for recursive notify_change calls */
3047         ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
3048
3049         reiserfs_write_lock(inode->i_sb);
3050         if (attr->ia_valid & ATTR_SIZE) {
3051                 /* version 2 items will be caught by the s_maxbytes check
3052                  ** done for us in vmtruncate
3053                  */
3054                 if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
3055                     attr->ia_size > MAX_NON_LFS) {
3056                         error = -EFBIG;
3057                         goto out;
3058                 }
3059                 /* fill in hole pointers in the expanding truncate case. */
3060                 if (attr->ia_size > inode->i_size) {
3061                         error = generic_cont_expand_simple(inode, attr->ia_size);
3062                         if (REISERFS_I(inode)->i_prealloc_count > 0) {
3063                                 int err;
3064                                 struct reiserfs_transaction_handle th;
3065                                 /* we're changing at most 2 bitmaps, inode + super */
3066                                 err = journal_begin(&th, inode->i_sb, 4);
3067                                 if (!err) {
3068                                         reiserfs_discard_prealloc(&th, inode);
3069                                         err = journal_end(&th, inode->i_sb, 4);
3070                                 }
3071                                 if (err)
3072                                         error = err;
3073                         }
3074                         if (error)
3075                                 goto out;
3076                         /*
3077                          * file size is changed, ctime and mtime are
3078                          * to be updated
3079                          */
3080                         attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME);
3081                 }
3082         }
3083
3084         if ((((attr->ia_valid & ATTR_UID) && (attr->ia_uid & ~0xffff)) ||
3085              ((attr->ia_valid & ATTR_GID) && (attr->ia_gid & ~0xffff))) &&
3086             (get_inode_sd_version(inode) == STAT_DATA_V1)) {
3087                 /* stat data of format v3.5 has 16 bit uid and gid */
3088                 error = -EINVAL;
3089                 goto out;
3090         }
3091
3092         error = inode_change_ok(inode, attr);
3093         if (!error) {
3094                 if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
3095                     (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
3096                         error = reiserfs_chown_xattrs(inode, attr);
3097
3098                         if (!error) {
3099                                 struct reiserfs_transaction_handle th;
3100                                 int jbegin_count =
3101                                     2 *
3102                                     (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) +
3103                                      REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) +
3104                                     2;
3105
3106                                 /* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
3107                                 error =
3108                                     journal_begin(&th, inode->i_sb,
3109                                                   jbegin_count);
3110                                 if (error)
3111                                         goto out;
3112                                 error =
3113                                     vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
3114                                 if (error) {
3115                                         journal_end(&th, inode->i_sb,
3116                                                     jbegin_count);
3117                                         goto out;
3118                                 }
3119                                 /* Update corresponding info in inode so that everything is in
3120                                  * one transaction */
3121                                 if (attr->ia_valid & ATTR_UID)
3122                                         inode->i_uid = attr->ia_uid;
3123                                 if (attr->ia_valid & ATTR_GID)
3124                                         inode->i_gid = attr->ia_gid;
3125                                 mark_inode_dirty(inode);
3126                                 error =
3127                                     journal_end(&th, inode->i_sb, jbegin_count);
3128                         }
3129                 }
3130                 if (!error)
3131                         error = inode_setattr(inode, attr);
3132         }
3133
3134         if (!error && reiserfs_posixacl(inode->i_sb)) {
3135                 if (attr->ia_valid & ATTR_MODE)
3136                         error = reiserfs_acl_chmod(inode);
3137         }
3138
3139       out:
3140         reiserfs_write_unlock(inode->i_sb);
3141         return error;
3142 }
3143
3144 const struct address_space_operations reiserfs_address_space_operations = {
3145         .writepage = reiserfs_writepage,
3146         .readpage = reiserfs_readpage,
3147         .readpages = reiserfs_readpages,
3148         .releasepage = reiserfs_releasepage,
3149         .invalidatepage = reiserfs_invalidatepage,
3150         .sync_page = block_sync_page,
3151         .write_begin = reiserfs_write_begin,
3152         .write_end = reiserfs_write_end,
3153         .bmap = reiserfs_aop_bmap,
3154         .direct_IO = reiserfs_direct_IO,
3155         .set_page_dirty = reiserfs_set_page_dirty,
3156 };