fs/reiserfs/inode.c

   1 /*
   2  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
   3  */
   4
   5 #include <linux/config.h>
   6 #include <linux/time.h>
   7 #include <linux/fs.h>
   8 #include <linux/reiserfs_fs.h>
   9 #include <linux/reiserfs_acl.h>
  10 #include <linux/reiserfs_xattr.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/vs_dlimit.h>
  21 #include <linux/vserver/xid.h>
  22
  23 extern int reiserfs_default_io_size;    /* default io size devuned in super.c */
  24
  25 static int reiserfs_commit_write(struct file *f, struct page *page,
  26                                  unsigned from, unsigned to);
  27 static int reiserfs_prepare_write(struct file *f, struct page *page,
  28                                   unsigned from, unsigned to);
  29
  30 void reiserfs_delete_inode(struct inode *inode)
  31 {
  32         /* We need blocks for transaction + (user+group) quota update (possibly delete) */
  33         int jbegin_count =
  34             JOURNAL_PER_BALANCE_CNT * 2 +
  35             2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb);
  36         struct reiserfs_transaction_handle th;
  37         int err;
  38
  39         truncate_inode_pages(&inode->i_data, 0);
  40
  41         reiserfs_write_lock(inode->i_sb);
  42
  43         /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
  44         if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {  /* also handles bad_inode case */
  45                 mutex_lock(&inode->i_mutex);
  46
  47                 reiserfs_delete_xattrs(inode);
  48
  49                 if (journal_begin(&th, inode->i_sb, jbegin_count)) {
  50                         mutex_unlock(&inode->i_mutex);
  51                         goto out;
  52                 }
  53                 reiserfs_update_inode_transaction(inode);
  54
  55                 err = reiserfs_delete_object(&th, inode);
  56
  57                 /* Do quota update inside a transaction for journaled quotas. We must do that
  58                  * after delete_object so that quota updates go into the same transaction as
  59                  * stat data deletion */
  60                 if (!err)
  61                         DQUOT_FREE_INODE(inode);
  62                 DLIMIT_FREE_INODE(inode);
  63
  64                 if (journal_end(&th, inode->i_sb, jbegin_count)) {
  65                         mutex_unlock(&inode->i_mutex);
  66                         goto out;
  67                 }
  68
  69                 mutex_unlock(&inode->i_mutex);
  70
  71                 /* check return value from reiserfs_delete_object after
  72                  * ending the transaction
  73                  */
  74                 if (err)
  75                     goto out;
  76
  77                 /* all items of file are deleted, so we can remove "save" link */
  78                 remove_save_link(inode, 0 /* not truncate */ ); /* we can't do anything
  79                                                                  * about an error here */
  80         } else {
  81                 /* no object items are in the tree */
  82                 ;
  83         }
  84       out:
  85         clear_inode(inode);     /* note this must go after the journal_end to prevent deadlock */
  86         inode->i_blocks = 0;
  87         reiserfs_write_unlock(inode->i_sb);
  88 }
  89
  90 static void _make_cpu_key(struct cpu_key *key, int version, __u32 dirid,
  91                           __u32 objectid, loff_t offset, int type, int length)
  92 {
  93         key->version = version;
  94
  95         key->on_disk_key.k_dir_id = dirid;
  96         key->on_disk_key.k_objectid = objectid;
  97         set_cpu_key_k_offset(key, offset);
  98         set_cpu_key_k_type(key, type);
  99         key->key_length = length;
 100 }
 101
 102 /* take base of inode_key (it comes from inode always) (dirid, objectid) and version from an inode, set
 103    offset and type of key */
 104 void make_cpu_key(struct cpu_key *key, struct inode *inode, loff_t offset,
 105                   int type, int length)
 106 {
 107         _make_cpu_key(key, get_inode_item_key_version(inode),
 108                       le32_to_cpu(INODE_PKEY(inode)->k_dir_id),
 109                       le32_to_cpu(INODE_PKEY(inode)->k_objectid), offset, type,
 110                       length);
 111 }
 112
 113 //
 114 // when key is 0, do not set version and short key
 115 //
 116 inline void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
 117                               int version,
 118                               loff_t offset, int type, int length,
 119                               int entry_count /*or ih_free_space */ )
 120 {
 121         if (key) {
 122                 ih->ih_key.k_dir_id = cpu_to_le32(key->on_disk_key.k_dir_id);
 123                 ih->ih_key.k_objectid =
 124                     cpu_to_le32(key->on_disk_key.k_objectid);
 125         }
 126         put_ih_version(ih, version);
 127         set_le_ih_k_offset(ih, offset);
 128         set_le_ih_k_type(ih, type);
 129         put_ih_item_len(ih, length);
 130         /*    set_ih_free_space (ih, 0); */
 131         // for directory items it is entry count, for directs and stat
 132         // datas - 0xffff, for indirects - 0
 133         put_ih_entry_count(ih, entry_count);
 134 }
 135
 136 //
 137 // FIXME: we might cache recently accessed indirect item
 138
 139 // Ugh.  Not too eager for that....
 140 //  I cut the code until such time as I see a convincing argument (benchmark).
 141 // I don't want a bloated inode struct..., and I don't like code complexity....
 142
 143 /* cutting the code is fine, since it really isn't in use yet and is easy
 144 ** to add back in.  But, Vladimir has a really good idea here.  Think
 145 ** about what happens for reading a file.  For each page,
 146 ** The VFS layer calls reiserfs_readpage, who searches the tree to find
 147 ** an indirect item.  This indirect item has X number of pointers, where
 148 ** X is a big number if we've done the block allocation right.  But,
 149 ** we only use one or two of these pointers during each call to readpage,
 150 ** needlessly researching again later on.
 151 **
 152 ** The size of the cache could be dynamic based on the size of the file.
 153 **
 154 ** I'd also like to see us cache the location the stat data item, since
 155 ** we are needlessly researching for that frequently.
 156 **
 157 ** --chris
 158 */
 159
 160 /* If this page has a file tail in it, and
 161 ** it was read in by get_block_create_0, the page data is valid,
 162 ** but tail is still sitting in a direct item, and we can't write to
 163 ** it.  So, look through this page, and check all the mapped buffers
 164 ** to make sure they have valid block numbers.  Any that don't need
 165 ** to be unmapped, so that block_prepare_write will correctly call
 166 ** reiserfs_get_block to convert the tail into an unformatted node
 167 */
 168 static inline void fix_tail_page_for_writing(struct page *page)
 169 {
 170         struct buffer_head *head, *next, *bh;
 171
 172         if (page && page_has_buffers(page)) {
 173                 head = page_buffers(page);
 174                 bh = head;
 175                 do {
 176                         next = bh->b_this_page;
 177                         if (buffer_mapped(bh) && bh->b_blocknr == 0) {
 178                                 reiserfs_unmap_buffer(bh);
 179                         }
 180                         bh = next;
 181                 } while (bh != head);
 182         }
 183 }
 184
 185 /* reiserfs_get_block does not need to allocate a block only if it has been
 186    done already or non-hole position has been found in the indirect item */
 187 static inline int allocation_needed(int retval, b_blocknr_t allocated,
 188                                     struct item_head *ih,
 189                                     __le32 * item, int pos_in_item)
 190 {
 191         if (allocated)
 192                 return 0;
 193         if (retval == POSITION_FOUND && is_indirect_le_ih(ih) &&
 194             get_block_num(item, pos_in_item))
 195                 return 0;
 196         return 1;
 197 }
 198
 199 static inline int indirect_item_found(int retval, struct item_head *ih)
 200 {
 201         return (retval == POSITION_FOUND) && is_indirect_le_ih(ih);
 202 }
 203
 204 static inline void set_block_dev_mapped(struct buffer_head *bh,
 205                                         b_blocknr_t block, struct inode *inode)
 206 {
 207         map_bh(bh, inode->i_sb, block);
 208 }
 209
 210 //
 211 // files which were created in the earlier version can not be longer,
 212 // than 2 gb
 213 //
 214 static int file_capable(struct inode *inode, long block)
 215 {
 216         if (get_inode_item_key_version(inode) != KEY_FORMAT_3_5 ||      // it is new file.
 217             block < (1 << (31 - inode->i_sb->s_blocksize_bits)))        // old file, but 'block' is inside of 2gb
 218                 return 1;
 219
 220         return 0;
 221 }
 222
 223 /*static*/ int restart_transaction(struct reiserfs_transaction_handle *th,
 224                                    struct inode *inode, struct path *path)
 225 {
 226         struct super_block *s = th->t_super;
 227         int len = th->t_blocks_allocated;
 228         int err;
 229
 230         BUG_ON(!th->t_trans_id);
 231         BUG_ON(!th->t_refcount);
 232
 233         /* we cannot restart while nested */
 234         if (th->t_refcount > 1) {
 235                 return 0;
 236         }
 237         pathrelse(path);
 238         reiserfs_update_sd(th, inode);
 239         err = journal_end(th, s, len);
 240         if (!err) {
 241                 err = journal_begin(th, s, JOURNAL_PER_BALANCE_CNT * 6);
 242                 if (!err)
 243                         reiserfs_update_inode_transaction(inode);
 244         }
 245         return err;
 246 }
 247
 248 // it is called by get_block when create == 0. Returns block number
 249 // for 'block'-th logical block of file. When it hits direct item it
 250 // returns 0 (being called from bmap) or read direct item into piece
 251 // of page (bh_result)
 252
 253 // Please improve the english/clarity in the comment above, as it is
 254 // hard to understand.
 255
 256 static int _get_block_create_0(struct inode *inode, long block,
 257                                struct buffer_head *bh_result, int args)
 258 {
 259         INITIALIZE_PATH(path);
 260         struct cpu_key key;
 261         struct buffer_head *bh;
 262         struct item_head *ih, tmp_ih;
 263         int fs_gen;
 264         int blocknr;
 265         char *p = NULL;
 266         int chars;
 267         int ret;
 268         int result;
 269         int done = 0;
 270         unsigned long offset;
 271
 272         // prepare the key to look for the 'block'-th block of file
 273         make_cpu_key(&key, inode,
 274                      (loff_t) block * inode->i_sb->s_blocksize + 1, TYPE_ANY,
 275                      3);
 276
 277       research:
 278         result = search_for_position_by_key(inode->i_sb, &key, &path);
 279         if (result != POSITION_FOUND) {
 280                 pathrelse(&path);
 281                 if (p)
 282                         kunmap(bh_result->b_page);
 283                 if (result == IO_ERROR)
 284                         return -EIO;
 285                 // We do not return -ENOENT if there is a hole but page is uptodate, because it means
 286                 // That there is some MMAPED data associated with it that is yet to be written to disk.
 287                 if ((args & GET_BLOCK_NO_HOLE)
 288                     && !PageUptodate(bh_result->b_page)) {
 289                         return -ENOENT;
 290                 }
 291                 return 0;
 292         }
 293         //
 294         bh = get_last_bh(&path);
 295         ih = get_ih(&path);
 296         if (is_indirect_le_ih(ih)) {
 297                 __le32 *ind_item = (__le32 *) B_I_PITEM(bh, ih);
 298
 299                 /* FIXME: here we could cache indirect item or part of it in
 300                    the inode to avoid search_by_key in case of subsequent
 301                    access to file */
 302                 blocknr = get_block_num(ind_item, path.pos_in_item);
 303                 ret = 0;
 304                 if (blocknr) {
 305                         map_bh(bh_result, inode->i_sb, blocknr);
 306                         if (path.pos_in_item ==
 307                             ((ih_item_len(ih) / UNFM_P_SIZE) - 1)) {
 308                                 set_buffer_boundary(bh_result);
 309                         }
 310                 } else
 311                         // We do not return -ENOENT if there is a hole but page is uptodate, because it means
 312                         // That there is some MMAPED data associated with it that is yet to  be written to disk.
 313                 if ((args & GET_BLOCK_NO_HOLE)
 314                             && !PageUptodate(bh_result->b_page)) {
 315                         ret = -ENOENT;
 316                 }
 317
 318                 pathrelse(&path);
 319                 if (p)
 320                         kunmap(bh_result->b_page);
 321                 return ret;
 322         }
 323         // requested data are in direct item(s)
 324         if (!(args & GET_BLOCK_READ_DIRECT)) {
 325                 // we are called by bmap. FIXME: we can not map block of file
 326                 // when it is stored in direct item(s)
 327                 pathrelse(&path);
 328                 if (p)
 329                         kunmap(bh_result->b_page);
 330                 return -ENOENT;
 331         }
 332
 333         /* if we've got a direct item, and the buffer or page was uptodate,
 334          ** we don't want to pull data off disk again.  skip to the
 335          ** end, where we map the buffer and return
 336          */
 337         if (buffer_uptodate(bh_result)) {
 338                 goto finished;
 339         } else
 340                 /*
 341                  ** grab_tail_page can trigger calls to reiserfs_get_block on up to date
 342                  ** pages without any buffers.  If the page is up to date, we don't want
 343                  ** read old data off disk.  Set the up to date bit on the buffer instead
 344                  ** and jump to the end
 345                  */
 346         if (!bh_result->b_page || PageUptodate(bh_result->b_page)) {
 347                 set_buffer_uptodate(bh_result);
 348                 goto finished;
 349         }
 350         // read file tail into part of page
 351         offset = (cpu_key_k_offset(&key) - 1) & (PAGE_CACHE_SIZE - 1);
 352         fs_gen = get_generation(inode->i_sb);
 353         copy_item_head(&tmp_ih, ih);
 354
 355         /* we only want to kmap if we are reading the tail into the page.
 356          ** this is not the common case, so we don't kmap until we are
 357          ** sure we need to.  But, this means the item might move if
 358          ** kmap schedules
 359          */
 360         if (!p) {
 361                 p = (char *)kmap(bh_result->b_page);
 362                 if (fs_changed(fs_gen, inode->i_sb)
 363                     && item_moved(&tmp_ih, &path)) {
 364                         goto research;
 365                 }
 366         }
 367         p += offset;
 368         memset(p, 0, inode->i_sb->s_blocksize);
 369         do {
 370                 if (!is_direct_le_ih(ih)) {
 371                         BUG();
 372                 }
 373                 /* make sure we don't read more bytes than actually exist in
 374                  ** the file.  This can happen in odd cases where i_size isn't
 375                  ** correct, and when direct item padding results in a few
 376                  ** extra bytes at the end of the direct item
 377                  */
 378                 if ((le_ih_k_offset(ih) + path.pos_in_item) > inode->i_size)
 379                         break;
 380                 if ((le_ih_k_offset(ih) - 1 + ih_item_len(ih)) > inode->i_size) {
 381                         chars =
 382                             inode->i_size - (le_ih_k_offset(ih) - 1) -
 383                             path.pos_in_item;
 384                         done = 1;
 385                 } else {
 386                         chars = ih_item_len(ih) - path.pos_in_item;
 387                 }
 388                 memcpy(p, B_I_PITEM(bh, ih) + path.pos_in_item, chars);
 389
 390                 if (done)
 391                         break;
 392
 393                 p += chars;
 394
 395                 if (PATH_LAST_POSITION(&path) != (B_NR_ITEMS(bh) - 1))
 396                         // we done, if read direct item is not the last item of
 397                         // node FIXME: we could try to check right delimiting key
 398                         // to see whether direct item continues in the right
 399                         // neighbor or rely on i_size
 400                         break;
 401
 402                 // update key to look for the next piece
 403                 set_cpu_key_k_offset(&key, cpu_key_k_offset(&key) + chars);
 404                 result = search_for_position_by_key(inode->i_sb, &key, &path);
 405                 if (result != POSITION_FOUND)
 406                         // i/o error most likely
 407                         break;
 408                 bh = get_last_bh(&path);
 409                 ih = get_ih(&path);
 410         } while (1);
 411
 412         flush_dcache_page(bh_result->b_page);
 413         kunmap(bh_result->b_page);
 414
 415       finished:
 416         pathrelse(&path);
 417
 418         if (result == IO_ERROR)
 419                 return -EIO;
 420
 421         /* this buffer has valid data, but isn't valid for io.  mapping it to
 422          * block #0 tells the rest of reiserfs it just has a tail in it
 423          */
 424         map_bh(bh_result, inode->i_sb, 0);
 425         set_buffer_uptodate(bh_result);
 426         return 0;
 427 }
 428
 429 // this is called to create file map. So, _get_block_create_0 will not
 430 // read direct item
 431 static int reiserfs_bmap(struct inode *inode, sector_t block,
 432                          struct buffer_head *bh_result, int create)
 433 {
 434         if (!file_capable(inode, block))
 435                 return -EFBIG;
 436
 437         reiserfs_write_lock(inode->i_sb);
 438         /* do not read the direct item */
 439         _get_block_create_0(inode, block, bh_result, 0);
 440         reiserfs_write_unlock(inode->i_sb);
 441         return 0;
 442 }
 443
 444 /* special version of get_block that is only used by grab_tail_page right
 445 ** now.  It is sent to block_prepare_write, and when you try to get a
 446 ** block past the end of the file (or a block from a hole) it returns
 447 ** -ENOENT instead of a valid buffer.  block_prepare_write expects to
 448 ** be able to do i/o on the buffers returned, unless an error value
 449 ** is also returned.
 450 **
 451 ** So, this allows block_prepare_write to be used for reading a single block
 452 ** in a page.  Where it does not produce a valid page for holes, or past the
 453 ** end of the file.  This turns out to be exactly what we need for reading
 454 ** tails for conversion.
 455 **
 456 ** The point of the wrapper is forcing a certain value for create, even
 457 ** though the VFS layer is calling this function with create==1.  If you
 458 ** don't want to send create == GET_BLOCK_NO_HOLE to reiserfs_get_block,
 459 ** don't use this function.
 460 */
 461 static int reiserfs_get_block_create_0(struct inode *inode, sector_t block,
 462                                        struct buffer_head *bh_result,
 463                                        int create)
 464 {
 465         return reiserfs_get_block(inode, block, bh_result, GET_BLOCK_NO_HOLE);
 466 }
 467
 468 /* This is special helper for reiserfs_get_block in case we are executing
 469    direct_IO request. */
 470 static int reiserfs_get_blocks_direct_io(struct inode *inode,
 471                                          sector_t iblock,
 472                                          struct buffer_head *bh_result,
 473                                          int create)
 474 {
 475         int ret;
 476
 477         bh_result->b_page = NULL;
 478
 479         /* We set the b_size before reiserfs_get_block call since it is
 480            referenced in convert_tail_for_hole() that may be called from
 481            reiserfs_get_block() */
 482         bh_result->b_size = (1 << inode->i_blkbits);
 483
 484         ret = reiserfs_get_block(inode, iblock, bh_result,
 485                                  create | GET_BLOCK_NO_DANGLE);
 486         if (ret)
 487                 goto out;
 488
 489         /* don't allow direct io onto tail pages */
 490         if (buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
 491                 /* make sure future calls to the direct io funcs for this offset
 492                  ** in the file fail by unmapping the buffer
 493                  */
 494                 clear_buffer_mapped(bh_result);
 495                 ret = -EINVAL;
 496         }
 497         /* Possible unpacked tail. Flush the data before pages have
 498            disappeared */
 499         if (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) {
 500                 int err;
 501                 lock_kernel();
 502                 err = reiserfs_commit_for_inode(inode);
 503                 REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
 504                 unlock_kernel();
 505                 if (err < 0)
 506                         ret = err;
 507         }
 508       out:
 509         return ret;
 510 }
 511
 512 /*
 513 ** helper function for when reiserfs_get_block is called for a hole
 514 ** but the file tail is still in a direct item
 515 ** bh_result is the buffer head for the hole
 516 ** tail_offset is the offset of the start of the tail in the file
 517 **
 518 ** This calls prepare_write, which will start a new transaction
 519 ** you should not be in a transaction, or have any paths held when you
 520 ** call this.
 521 */
 522 static int convert_tail_for_hole(struct inode *inode,
 523                                  struct buffer_head *bh_result,
 524                                  loff_t tail_offset)
 525 {
 526         unsigned long index;
 527         unsigned long tail_end;
 528         unsigned long tail_start;
 529         struct page *tail_page;
 530         struct page *hole_page = bh_result->b_page;
 531         int retval = 0;
 532
 533         if ((tail_offset & (bh_result->b_size - 1)) != 1)
 534                 return -EIO;
 535
 536         /* always try to read until the end of the block */
 537         tail_start = tail_offset & (PAGE_CACHE_SIZE - 1);
 538         tail_end = (tail_start | (bh_result->b_size - 1)) + 1;
 539
 540         index = tail_offset >> PAGE_CACHE_SHIFT;
 541         /* hole_page can be zero in case of direct_io, we are sure
 542            that we cannot get here if we write with O_DIRECT into
 543            tail page */
 544         if (!hole_page || index != hole_page->index) {
 545                 tail_page = grab_cache_page(inode->i_mapping, index);
 546                 retval = -ENOMEM;
 547                 if (!tail_page) {
 548                         goto out;
 549                 }
 550         } else {
 551                 tail_page = hole_page;
 552         }
 553
 554         /* we don't have to make sure the conversion did not happen while
 555          ** we were locking the page because anyone that could convert
 556          ** must first take i_mutex.
 557          **
 558          ** We must fix the tail page for writing because it might have buffers
 559          ** that are mapped, but have a block number of 0.  This indicates tail
 560          ** data that has been read directly into the page, and block_prepare_write
 561          ** won't trigger a get_block in this case.
 562          */
 563         fix_tail_page_for_writing(tail_page);
 564         retval = reiserfs_prepare_write(NULL, tail_page, tail_start, tail_end);
 565         if (retval)
 566                 goto unlock;
 567
 568         /* tail conversion might change the data in the page */
 569         flush_dcache_page(tail_page);
 570
 571         retval = reiserfs_commit_write(NULL, tail_page, tail_start, tail_end);
 572
 573       unlock:
 574         if (tail_page != hole_page) {
 575                 unlock_page(tail_page);
 576                 page_cache_release(tail_page);
 577         }
 578       out:
 579         return retval;
 580 }
 581
 582 static inline int _allocate_block(struct reiserfs_transaction_handle *th,
 583                                   long block,
 584                                   struct inode *inode,
 585                                   b_blocknr_t * allocated_block_nr,
 586                                   struct path *path, int flags)
 587 {
 588         BUG_ON(!th->t_trans_id);
 589
 590 #ifdef REISERFS_PREALLOCATE
 591         if (!(flags & GET_BLOCK_NO_IMUX)) {
 592                 return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
 593                                                   path, block);
 594         }
 595 #endif
 596         return reiserfs_new_unf_blocknrs(th, inode, allocated_block_nr, path,
 597                                          block);
 598 }
 599
 600 int reiserfs_get_block(struct inode *inode, sector_t block,
 601                        struct buffer_head *bh_result, int create)
 602 {
 603         int repeat, retval = 0;
 604         b_blocknr_t allocated_block_nr = 0;     // b_blocknr_t is (unsigned) 32 bit int
 605         INITIALIZE_PATH(path);
 606         int pos_in_item;
 607         struct cpu_key key;
 608         struct buffer_head *bh, *unbh = NULL;
 609         struct item_head *ih, tmp_ih;
 610         __le32 *item;
 611         int done;
 612         int fs_gen;
 613         struct reiserfs_transaction_handle *th = NULL;
 614         /* space reserved in transaction batch:
 615            . 3 balancings in direct->indirect conversion
 616            . 1 block involved into reiserfs_update_sd()
 617            XXX in practically impossible worst case direct2indirect()
 618            can incur (much) more than 3 balancings.
 619            quota update for user, group */
 620         int jbegin_count =
 621             JOURNAL_PER_BALANCE_CNT * 3 + 1 +
 622             2 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
 623         int version;
 624         int dangle = 1;
 625         loff_t new_offset =
 626             (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1;
 627
 628         /* bad.... */
 629         reiserfs_write_lock(inode->i_sb);
 630         version = get_inode_item_key_version(inode);
 631
 632         if (!file_capable(inode, block)) {
 633                 reiserfs_write_unlock(inode->i_sb);
 634                 return -EFBIG;
 635         }
 636
 637         /* if !create, we aren't changing the FS, so we don't need to
 638          ** log anything, so we don't need to start a transaction
 639          */
 640         if (!(create & GET_BLOCK_CREATE)) {
 641                 int ret;
 642                 /* find number of block-th logical block of the file */
 643                 ret = _get_block_create_0(inode, block, bh_result,
 644                                           create | GET_BLOCK_READ_DIRECT);
 645                 reiserfs_write_unlock(inode->i_sb);
 646                 return ret;
 647         }
 648         /*
 649          * if we're already in a transaction, make sure to close
 650          * any new transactions we start in this func
 651          */
 652         if ((create & GET_BLOCK_NO_DANGLE) ||
 653             reiserfs_transaction_running(inode->i_sb))
 654                 dangle = 0;
 655
 656         /* If file is of such a size, that it might have a tail and tails are enabled
 657          ** we should mark it as possibly needing tail packing on close
 658          */
 659         if ((have_large_tails(inode->i_sb)
 660              && inode->i_size < i_block_size(inode) * 4)
 661             || (have_small_tails(inode->i_sb)
 662                 && inode->i_size < i_block_size(inode)))
 663                 REISERFS_I(inode)->i_flags |= i_pack_on_close_mask;
 664
 665         /* set the key of the first byte in the 'block'-th block of file */
 666         make_cpu_key(&key, inode, new_offset, TYPE_ANY, 3 /*key length */ );
 667         if ((new_offset + inode->i_sb->s_blocksize - 1) > inode->i_size) {
 668               start_trans:
 669                 th = reiserfs_persistent_transaction(inode->i_sb, jbegin_count);
 670                 if (!th) {
 671                         retval = -ENOMEM;
 672                         goto failure;
 673                 }
 674                 reiserfs_update_inode_transaction(inode);
 675         }
 676       research:
 677
 678         retval = search_for_position_by_key(inode->i_sb, &key, &path);
 679         if (retval == IO_ERROR) {
 680                 retval = -EIO;
 681                 goto failure;
 682         }
 683
 684         bh = get_last_bh(&path);
 685         ih = get_ih(&path);
 686         item = get_item(&path);
 687         pos_in_item = path.pos_in_item;
 688
 689         fs_gen = get_generation(inode->i_sb);
 690         copy_item_head(&tmp_ih, ih);
 691
 692         if (allocation_needed
 693             (retval, allocated_block_nr, ih, item, pos_in_item)) {
 694                 /* we have to allocate block for the unformatted node */
 695                 if (!th) {
 696                         pathrelse(&path);
 697                         goto start_trans;
 698                 }
 699
 700                 repeat =
 701                     _allocate_block(th, block, inode, &allocated_block_nr,
 702                                     &path, create);
 703
 704                 if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) {
 705                         /* restart the transaction to give the journal a chance to free
 706                          ** some blocks.  releases the path, so we have to go back to
 707                          ** research if we succeed on the second try
 708                          */
 709                         SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1;
 710                         retval = restart_transaction(th, inode, &path);
 711                         if (retval)
 712                                 goto failure;
 713                         repeat =
 714                             _allocate_block(th, block, inode,
 715                                             &allocated_block_nr, NULL, create);
 716
 717                         if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) {
 718                                 goto research;
 719                         }
 720                         if (repeat == QUOTA_EXCEEDED)
 721                                 retval = -EDQUOT;
 722                         else
 723                                 retval = -ENOSPC;
 724                         goto failure;
 725                 }
 726
 727                 if (fs_changed(fs_gen, inode->i_sb)
 728                     && item_moved(&tmp_ih, &path)) {
 729                         goto research;
 730                 }
 731         }
 732
 733         if (indirect_item_found(retval, ih)) {
 734                 b_blocknr_t unfm_ptr;
 735                 /* 'block'-th block is in the file already (there is
 736                    corresponding cell in some indirect item). But it may be
 737                    zero unformatted node pointer (hole) */
 738                 unfm_ptr = get_block_num(item, pos_in_item);
 739                 if (unfm_ptr == 0) {
 740                         /* use allocated block to plug the hole */
 741                         reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
 742                         if (fs_changed(fs_gen, inode->i_sb)
 743                             && item_moved(&tmp_ih, &path)) {
 744                                 reiserfs_restore_prepared_buffer(inode->i_sb,
 745                                                                  bh);
 746                                 goto research;
 747                         }
 748                         set_buffer_new(bh_result);
 749                         if (buffer_dirty(bh_result)
 750                             && reiserfs_data_ordered(inode->i_sb))
 751                                 reiserfs_add_ordered_list(inode, bh_result);
 752                         put_block_num(item, pos_in_item, allocated_block_nr);
 753                         unfm_ptr = allocated_block_nr;
 754                         journal_mark_dirty(th, inode->i_sb, bh);
 755                         reiserfs_update_sd(th, inode);
 756                 }
 757                 set_block_dev_mapped(bh_result, unfm_ptr, inode);
 758                 pathrelse(&path);
 759                 retval = 0;
 760                 if (!dangle && th)
 761                         retval = reiserfs_end_persistent_transaction(th);
 762
 763                 reiserfs_write_unlock(inode->i_sb);
 764
 765                 /* the item was found, so new blocks were not added to the file
 766                  ** there is no need to make sure the inode is updated with this
 767                  ** transaction
 768                  */
 769                 return retval;
 770         }
 771
 772         if (!th) {
 773                 pathrelse(&path);
 774                 goto start_trans;
 775         }
 776
 777         /* desired position is not found or is in the direct item. We have
 778            to append file with holes up to 'block'-th block converting
 779            direct items to indirect one if necessary */
 780         done = 0;
 781         do {
 782                 if (is_statdata_le_ih(ih)) {
 783                         __le32 unp = 0;
 784                         struct cpu_key tmp_key;
 785
 786                         /* indirect item has to be inserted */
 787                         make_le_item_head(&tmp_ih, &key, version, 1,
 788                                           TYPE_INDIRECT, UNFM_P_SIZE,
 789                                           0 /* free_space */ );
 790
 791                         if (cpu_key_k_offset(&key) == 1) {
 792                                 /* we are going to add 'block'-th block to the file. Use
 793                                    allocated block for that */
 794                                 unp = cpu_to_le32(allocated_block_nr);
 795                                 set_block_dev_mapped(bh_result,
 796                                                      allocated_block_nr, inode);
 797                                 set_buffer_new(bh_result);
 798                                 done = 1;
 799                         }
 800                         tmp_key = key;  // ;)
 801                         set_cpu_key_k_offset(&tmp_key, 1);
 802                         PATH_LAST_POSITION(&path)++;
 803
 804                         retval =
 805                             reiserfs_insert_item(th, &path, &tmp_key, &tmp_ih,
 806                                                  inode, (char *)&unp);
 807                         if (retval) {
 808                                 reiserfs_free_block(th, inode,
 809                                                     allocated_block_nr, 1);
 810                                 goto failure;   // retval == -ENOSPC, -EDQUOT or -EIO or -EEXIST
 811                         }
 812                         //mark_tail_converted (inode);
 813                 } else if (is_direct_le_ih(ih)) {
 814                         /* direct item has to be converted */
 815                         loff_t tail_offset;
 816
 817                         tail_offset =
 818                             ((le_ih_k_offset(ih) -
 819                               1) & ~(inode->i_sb->s_blocksize - 1)) + 1;
 820                         if (tail_offset == cpu_key_k_offset(&key)) {
 821                                 /* direct item we just found fits into block we have
 822                                    to map. Convert it into unformatted node: use
 823                                    bh_result for the conversion */
 824                                 set_block_dev_mapped(bh_result,
 825                                                      allocated_block_nr, inode);
 826                                 unbh = bh_result;
 827                                 done = 1;
 828                         } else {
 829                                 /* we have to padd file tail stored in direct item(s)
 830                                    up to block size and convert it to unformatted
 831                                    node. FIXME: this should also get into page cache */
 832
 833                                 pathrelse(&path);
 834                                 /*
 835                                  * ugly, but we can only end the transaction if
 836                                  * we aren't nested
 837                                  */
 838                                 BUG_ON(!th->t_refcount);
 839                                 if (th->t_refcount == 1) {
 840                                         retval =
 841                                             reiserfs_end_persistent_transaction
 842                                             (th);
 843                                         th = NULL;
 844                                         if (retval)
 845                                                 goto failure;
 846                                 }
 847
 848                                 retval =
 849                                     convert_tail_for_hole(inode, bh_result,
 850                                                           tail_offset);
 851                                 if (retval) {
 852                                         if (retval != -ENOSPC)
 853                                                 reiserfs_warning(inode->i_sb,
 854                                                                  "clm-6004: convert tail failed inode %lu, error %d",
 855                                                                  inode->i_ino,
 856                                                                  retval);
 857                                         if (allocated_block_nr) {
 858                                                 /* the bitmap, the super, and the stat data == 3 */
 859                                                 if (!th)
 860                                                         th = reiserfs_persistent_transaction(inode->i_sb, 3);
 861                                                 if (th)
 862                                                         reiserfs_free_block(th,
 863                                                                             inode,
 864                                                                             allocated_block_nr,
 865                                                                             1);
 866                                         }
 867                                         goto failure;
 868                                 }
 869                                 goto research;
 870                         }
 871                         retval =
 872                             direct2indirect(th, inode, &path, unbh,
 873                                             tail_offset);
 874                         if (retval) {
 875                                 reiserfs_unmap_buffer(unbh);
 876                                 reiserfs_free_block(th, inode,
 877                                                     allocated_block_nr, 1);
 878                                 goto failure;
 879                         }
 880                         /* it is important the set_buffer_uptodate is done after
 881                          ** the direct2indirect.  The buffer might contain valid
 882                          ** data newer than the data on disk (read by readpage, changed,
 883                          ** and then sent here by writepage).  direct2indirect needs
 884                          ** to know if unbh was already up to date, so it can decide
 885                          ** if the data in unbh needs to be replaced with data from
 886                          ** the disk
 887                          */
 888                         set_buffer_uptodate(unbh);
 889
 890                         /* unbh->b_page == NULL in case of DIRECT_IO request, this means
 891                            buffer will disappear shortly, so it should not be added to
 892                          */
 893                         if (unbh->b_page) {
 894                                 /* we've converted the tail, so we must
 895                                  ** flush unbh before the transaction commits
 896                                  */
 897                                 reiserfs_add_tail_list(inode, unbh);
 898
 899                                 /* mark it dirty now to prevent commit_write from adding
 900                                  ** this buffer to the inode's dirty buffer list
 901                                  */
 902                                 /*
 903                                  * AKPM: changed __mark_buffer_dirty to mark_buffer_dirty().
 904                                  * It's still atomic, but it sets the page dirty too,
 905                                  * which makes it eligible for writeback at any time by the
 906                                  * VM (which was also the case with __mark_buffer_dirty())
 907                                  */
 908                                 mark_buffer_dirty(unbh);
 909                         }
 910                 } else {
 911                         /* append indirect item with holes if needed, when appending
 912                            pointer to 'block'-th block use block, which is already
 913                            allocated */
 914                         struct cpu_key tmp_key;
 915                         unp_t unf_single = 0;   // We use this in case we need to allocate only
 916                         // one block which is a fastpath
 917                         unp_t *un;
 918                         __u64 max_to_insert =
 919                             MAX_ITEM_LEN(inode->i_sb->s_blocksize) /
 920                             UNFM_P_SIZE;
 921                         __u64 blocks_needed;
 922
 923                         RFALSE(pos_in_item != ih_item_len(ih) / UNFM_P_SIZE,
 924                                "vs-804: invalid position for append");
 925                         /* indirect item has to be appended, set up key of that position */
 926                         make_cpu_key(&tmp_key, inode,
 927                                      le_key_k_offset(version,
 928                                                      &(ih->ih_key)) +
 929                                      op_bytes_number(ih,
 930                                                      inode->i_sb->s_blocksize),
 931                                      //pos_in_item * inode->i_sb->s_blocksize,
 932                                      TYPE_INDIRECT, 3); // key type is unimportant
 933
 934                         RFALSE(cpu_key_k_offset(&tmp_key) > cpu_key_k_offset(&key),
 935                                "green-805: invalid offset");
 936                         blocks_needed =
 937                             1 +
 938                             ((cpu_key_k_offset(&key) -
 939                               cpu_key_k_offset(&tmp_key)) >> inode->i_sb->
 940                              s_blocksize_bits);
 941
 942                         if (blocks_needed == 1) {
 943                                 un = &unf_single;
 944                         } else {
 945                                 un = kmalloc(min(blocks_needed, max_to_insert) * UNFM_P_SIZE, GFP_ATOMIC);      // We need to avoid scheduling.
 946                                 if (!un) {
 947                                         un = &unf_single;
 948                                         blocks_needed = 1;
 949                                         max_to_insert = 0;
 950                                 } else
 951                                         memset(un, 0,
 952                                                UNFM_P_SIZE * min(blocks_needed,
 953                                                                  max_to_insert));
 954                         }
 955                         if (blocks_needed <= max_to_insert) {
 956                                 /* we are going to add target block to the file. Use allocated
 957                                    block for that */
 958                                 un[blocks_needed - 1] =
 959                                     cpu_to_le32(allocated_block_nr);
 960                                 set_block_dev_mapped(bh_result,
 961                                                      allocated_block_nr, inode);
 962                                 set_buffer_new(bh_result);
 963                                 done = 1;
 964                         } else {
 965                                 /* paste hole to the indirect item */
 966                                 /* If kmalloc failed, max_to_insert becomes zero and it means we
 967                                    only have space for one block */
 968                                 blocks_needed =
 969                                     max_to_insert ? max_to_insert : 1;
 970                         }
 971                         retval =
 972                             reiserfs_paste_into_item(th, &path, &tmp_key, inode,
 973                                                      (char *)un,
 974                                                      UNFM_P_SIZE *
 975                                                      blocks_needed);
 976
 977                         if (blocks_needed != 1)
 978                                 kfree(un);
 979
 980                         if (retval) {
 981                                 reiserfs_free_block(th, inode,
 982                                                     allocated_block_nr, 1);
 983                                 goto failure;
 984                         }
 985                         if (!done) {
 986                                 /* We need to mark new file size in case this function will be
 987                                    interrupted/aborted later on. And we may do this only for
 988                                    holes. */
 989                                 inode->i_size +=
 990                                     inode->i_sb->s_blocksize * blocks_needed;
 991                         }
 992                 }
 993
 994                 if (done == 1)
 995                         break;
 996
 997                 /* this loop could log more blocks than we had originally asked
 998                  ** for.  So, we have to allow the transaction to end if it is
 999                  ** too big or too full.  Update the inode so things are
1000                  ** consistent if we crash before the function returns
1001                  **
1002                  ** release the path so that anybody waiting on the path before
1003                  ** ending their transaction will be able to continue.
1004                  */
1005                 if (journal_transaction_should_end(th, th->t_blocks_allocated)) {
1006                         retval = restart_transaction(th, inode, &path);
1007                         if (retval)
1008                                 goto failure;
1009                 }
1010                 /* inserting indirect pointers for a hole can take a
1011                  ** long time.  reschedule if needed
1012                  */
1013                 cond_resched();
1014
1015                 retval = search_for_position_by_key(inode->i_sb, &key, &path);
1016                 if (retval == IO_ERROR) {
1017                         retval = -EIO;
1018                         goto failure;
1019                 }
1020                 if (retval == POSITION_FOUND) {
1021                         reiserfs_warning(inode->i_sb,
1022                                          "vs-825: reiserfs_get_block: "
1023                                          "%K should not be found", &key);
1024                         retval = -EEXIST;
1025                         if (allocated_block_nr)
1026                                 reiserfs_free_block(th, inode,
1027                                                     allocated_block_nr, 1);
1028                         pathrelse(&path);
1029                         goto failure;
1030                 }
1031                 bh = get_last_bh(&path);
1032                 ih = get_ih(&path);
1033                 item = get_item(&path);
1034                 pos_in_item = path.pos_in_item;
1035         } while (1);
1036
1037         retval = 0;
1038
1039       failure:
1040         if (th && (!dangle || (retval && !th->t_trans_id))) {
1041                 int err;
1042                 if (th->t_trans_id)
1043                         reiserfs_update_sd(th, inode);
1044                 err = reiserfs_end_persistent_transaction(th);
1045                 if (err)
1046                         retval = err;
1047         }
1048
1049         reiserfs_write_unlock(inode->i_sb);
1050         reiserfs_check_path(&path);
1051         return retval;
1052 }
1053
1054 static int
1055 reiserfs_readpages(struct file *file, struct address_space *mapping,
1056                    struct list_head *pages, unsigned nr_pages)
1057 {
1058         return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block);
1059 }
1060
1061 /* Compute real number of used bytes by file
1062  * Following three functions can go away when we'll have enough space in stat item
1063  */
1064 static int real_space_diff(struct inode *inode, int sd_size)
1065 {
1066         int bytes;
1067         loff_t blocksize = inode->i_sb->s_blocksize;
1068
1069         if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode))
1070                 return sd_size;
1071
1072         /* End of file is also in full block with indirect reference, so round
1073          ** up to the next block.
1074          **
1075          ** there is just no way to know if the tail is actually packed
1076          ** on the file, so we have to assume it isn't.  When we pack the
1077          ** tail, we add 4 bytes to pretend there really is an unformatted
1078          ** node pointer
1079          */
1080         bytes =
1081             ((inode->i_size +
1082               (blocksize - 1)) >> inode->i_sb->s_blocksize_bits) * UNFM_P_SIZE +
1083             sd_size;
1084         return bytes;
1085 }
1086
1087 static inline loff_t to_real_used_space(struct inode *inode, ulong blocks,
1088                                         int sd_size)
1089 {
1090         if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
1091                 return inode->i_size +
1092                     (loff_t) (real_space_diff(inode, sd_size));
1093         }
1094         return ((loff_t) real_space_diff(inode, sd_size)) +
1095             (((loff_t) blocks) << 9);
1096 }
1097
1098 /* Compute number of blocks used by file in ReiserFS counting */
1099 static inline ulong to_fake_used_blocks(struct inode *inode, int sd_size)
1100 {
1101         loff_t bytes = inode_get_bytes(inode);
1102         loff_t real_space = real_space_diff(inode, sd_size);
1103
1104         /* keeps fsck and non-quota versions of reiserfs happy */
1105         if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
1106                 bytes += (loff_t) 511;
1107         }
1108
1109         /* files from before the quota patch might i_blocks such that
1110          ** bytes < real_space.  Deal with that here to prevent it from
1111          ** going negative.
1112          */
1113         if (bytes < real_space)
1114                 return 0;
1115         return (bytes - real_space) >> 9;
1116 }
1117
1118 //
1119 // BAD: new directories have stat data of new type and all other items
1120 // of old type. Version stored in the inode says about body items, so
1121 // in update_stat_data we can not rely on inode, but have to check
1122 // item version directly
1123 //
1124
1125 // called by read_locked_inode
1126 static void init_inode(struct inode *inode, struct path *path)
1127 {
1128         struct buffer_head *bh;
1129         struct item_head *ih;
1130         __u32 rdev;
1131         uid_t uid;
1132         gid_t gid;
1133         //int version = ITEM_VERSION_1;
1134
1135         bh = PATH_PLAST_BUFFER(path);
1136         ih = PATH_PITEM_HEAD(path);
1137
1138         copy_key(INODE_PKEY(inode), &(ih->ih_key));
1139         inode->i_blksize = reiserfs_default_io_size;
1140
1141         INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list));
1142         REISERFS_I(inode)->i_flags = 0;
1143         REISERFS_I(inode)->i_prealloc_block = 0;
1144         REISERFS_I(inode)->i_prealloc_count = 0;
1145         REISERFS_I(inode)->i_trans_id = 0;
1146         REISERFS_I(inode)->i_jl = NULL;
1147         REISERFS_I(inode)->i_acl_access = NULL;
1148         REISERFS_I(inode)->i_acl_default = NULL;
1149         init_rwsem(&REISERFS_I(inode)->xattr_sem);
1150
1151         if (stat_data_v1(ih)) {
1152                 struct stat_data_v1 *sd =
1153                     (struct stat_data_v1 *)B_I_PITEM(bh, ih);
1154                 unsigned long blocks;
1155
1156                 uid = sd_v1_uid(sd);
1157                 gid = sd_v1_gid(sd);
1158
1159                 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1160                 set_inode_sd_version(inode, STAT_DATA_V1);
1161                 inode->i_mode = sd_v1_mode(sd);
1162                 inode->i_nlink = sd_v1_nlink(sd);
1163                 inode->i_size = sd_v1_size(sd);
1164                 inode->i_atime.tv_sec = sd_v1_atime(sd);
1165                 inode->i_mtime.tv_sec = sd_v1_mtime(sd);
1166                 inode->i_ctime.tv_sec = sd_v1_ctime(sd);
1167                 inode->i_atime.tv_nsec = 0;
1168                 inode->i_ctime.tv_nsec = 0;
1169                 inode->i_mtime.tv_nsec = 0;
1170
1171                 inode->i_blocks = sd_v1_blocks(sd);
1172                 inode->i_generation = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1173                 blocks = (inode->i_size + 511) >> 9;
1174                 blocks = _ROUND_UP(blocks, inode->i_sb->s_blocksize >> 9);
1175                 if (inode->i_blocks > blocks) {
1176                         // there was a bug in <=3.5.23 when i_blocks could take negative
1177                         // values. Starting from 3.5.17 this value could even be stored in
1178                         // stat data. For such files we set i_blocks based on file
1179                         // size. Just 2 notes: this can be wrong for sparce files. On-disk value will be
1180                         // only updated if file's inode will ever change
1181                         inode->i_blocks = blocks;
1182                 }
1183
1184                 rdev = sd_v1_rdev(sd);
1185                 REISERFS_I(inode)->i_first_direct_byte =
1186                     sd_v1_first_direct_byte(sd);
1187                 /* an early bug in the quota code can give us an odd number for the
1188                  ** block count.  This is incorrect, fix it here.
1189                  */
1190                 if (inode->i_blocks & 1) {
1191                         inode->i_blocks++;
1192                 }
1193                 inode_set_bytes(inode,
1194                                 to_real_used_space(inode, inode->i_blocks,
1195                                                    SD_V1_SIZE));
1196                 /* nopack is initially zero for v1 objects. For v2 objects,
1197                    nopack is initialised from sd_attrs */
1198                 REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
1199         } else {
1200                 // new stat data found, but object may have old items
1201                 // (directories and symlinks)
1202                 struct stat_data *sd = (struct stat_data *)B_I_PITEM(bh, ih);
1203
1204                 uid    = sd_v2_uid(sd);
1205                 gid    = sd_v2_gid(sd);
1206
1207                 inode->i_mode = sd_v2_mode(sd);
1208                 inode->i_nlink = sd_v2_nlink(sd);
1209                 inode->i_size = sd_v2_size(sd);
1210                 inode->i_mtime.tv_sec = sd_v2_mtime(sd);
1211                 inode->i_atime.tv_sec = sd_v2_atime(sd);
1212                 inode->i_ctime.tv_sec = sd_v2_ctime(sd);
1213                 inode->i_ctime.tv_nsec = 0;
1214                 inode->i_mtime.tv_nsec = 0;
1215                 inode->i_atime.tv_nsec = 0;
1216                 inode->i_blocks = sd_v2_blocks(sd);
1217                 rdev = sd_v2_rdev(sd);
1218                 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1219                         inode->i_generation =
1220                             le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1221                 else
1222                         inode->i_generation = sd_v2_generation(sd);
1223
1224                 if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
1225                         set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1226                 else
1227                         set_inode_item_key_version(inode, KEY_FORMAT_3_6);
1228                 REISERFS_I(inode)->i_first_direct_byte = 0;
1229                 set_inode_sd_version(inode, STAT_DATA_V2);
1230                 inode_set_bytes(inode,
1231                                 to_real_used_space(inode, inode->i_blocks,
1232                                                    SD_V2_SIZE));
1233                 /* read persistent inode attributes from sd and initalise
1234                    generic inode flags from them */
1235                 REISERFS_I(inode)->i_attrs = sd_v2_attrs(sd);
1236                 sd_attrs_to_i_attrs(sd_v2_attrs(sd), inode);
1237         }
1238
1239         inode->i_uid = INOXID_UID(XID_TAG(inode), uid, gid);
1240         inode->i_gid = INOXID_GID(XID_TAG(inode), uid, gid);
1241         inode->i_xid = INOXID_XID(XID_TAG(inode), uid, gid, 0);
1242
1243         pathrelse(path);
1244         if (S_ISREG(inode->i_mode)) {
1245                 inode->i_op = &reiserfs_file_inode_operations;
1246                 inode->i_fop = &reiserfs_file_operations;
1247                 inode->i_mapping->a_ops = &reiserfs_address_space_operations;
1248         } else if (S_ISDIR(inode->i_mode)) {
1249                 inode->i_op = &reiserfs_dir_inode_operations;
1250                 inode->i_fop = &reiserfs_dir_operations;
1251         } else if (S_ISLNK(inode->i_mode)) {
1252                 inode->i_op = &reiserfs_symlink_inode_operations;
1253                 inode->i_mapping->a_ops = &reiserfs_address_space_operations;
1254         } else {
1255                 inode->i_blocks = 0;
1256                 inode->i_op = &reiserfs_special_inode_operations;
1257                 init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
1258         }
1259 }
1260
1261 // update new stat data with inode fields
1262 static void inode2sd(void *sd, struct inode *inode, loff_t size)
1263 {
1264         struct stat_data *sd_v2 = (struct stat_data *)sd;
1265         uid_t uid = XIDINO_UID(XID_TAG(inode), inode->i_uid, inode->i_xid);
1266         gid_t gid = XIDINO_GID(XID_TAG(inode), inode->i_gid, inode->i_xid);
1267         __u16 flags;
1268
1269         set_sd_v2_uid(sd_v2, uid);
1270         set_sd_v2_gid(sd_v2, gid);
1271         set_sd_v2_mode(sd_v2, inode->i_mode);
1272         set_sd_v2_nlink(sd_v2, inode->i_nlink);
1273         set_sd_v2_size(sd_v2, size);
1274         set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec);
1275         set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec);
1276         set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec);
1277         set_sd_v2_blocks(sd_v2, to_fake_used_blocks(inode, SD_V2_SIZE));
1278         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1279                 set_sd_v2_rdev(sd_v2, new_encode_dev(inode->i_rdev));
1280         else
1281                 set_sd_v2_generation(sd_v2, inode->i_generation);
1282         flags = REISERFS_I(inode)->i_attrs;
1283         i_attrs_to_sd_attrs(inode, &flags);
1284         set_sd_v2_attrs(sd_v2, flags);
1285 }
1286
1287 // used to copy inode's fields to old stat data
1288 static void inode2sd_v1(void *sd, struct inode *inode, loff_t size)
1289 {
1290         struct stat_data_v1 *sd_v1 = (struct stat_data_v1 *)sd;
1291
1292         set_sd_v1_mode(sd_v1, inode->i_mode);
1293         set_sd_v1_uid(sd_v1, inode->i_uid);
1294         set_sd_v1_gid(sd_v1, inode->i_gid);
1295         set_sd_v1_nlink(sd_v1, inode->i_nlink);
1296         set_sd_v1_size(sd_v1, size);
1297         set_sd_v1_atime(sd_v1, inode->i_atime.tv_sec);
1298         set_sd_v1_ctime(sd_v1, inode->i_ctime.tv_sec);
1299         set_sd_v1_mtime(sd_v1, inode->i_mtime.tv_sec);
1300
1301         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1302                 set_sd_v1_rdev(sd_v1, new_encode_dev(inode->i_rdev));
1303         else
1304                 set_sd_v1_blocks(sd_v1, to_fake_used_blocks(inode, SD_V1_SIZE));
1305
1306         // Sigh. i_first_direct_byte is back
1307         set_sd_v1_first_direct_byte(sd_v1,
1308                                     REISERFS_I(inode)->i_first_direct_byte);
1309 }
1310
1311 /* NOTE, you must prepare the buffer head before sending it here,
1312 ** and then log it after the call
1313 */
1314 static void update_stat_data(struct path *path, struct inode *inode,
1315                              loff_t size)
1316 {
1317         struct buffer_head *bh;
1318         struct item_head *ih;
1319
1320         bh = PATH_PLAST_BUFFER(path);
1321         ih = PATH_PITEM_HEAD(path);
1322
1323         if (!is_statdata_le_ih(ih))
1324                 reiserfs_panic(inode->i_sb,
1325                                "vs-13065: update_stat_data: key %k, found item %h",
1326                                INODE_PKEY(inode), ih);
1327
1328         if (stat_data_v1(ih)) {
1329                 // path points to old stat data
1330                 inode2sd_v1(B_I_PITEM(bh, ih), inode, size);
1331         } else {
1332                 inode2sd(B_I_PITEM(bh, ih), inode, size);
1333         }
1334
1335         return;
1336 }
1337
1338 void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
1339                              struct inode *inode, loff_t size)
1340 {
1341         struct cpu_key key;
1342         INITIALIZE_PATH(path);
1343         struct buffer_head *bh;
1344         int fs_gen;
1345         struct item_head *ih, tmp_ih;
1346         int retval;
1347
1348         BUG_ON(!th->t_trans_id);
1349
1350         make_cpu_key(&key, inode, SD_OFFSET, TYPE_STAT_DATA, 3);        //key type is unimportant
1351
1352         for (;;) {
1353                 int pos;
1354                 /* look for the object's stat data */
1355                 retval = search_item(inode->i_sb, &key, &path);
1356                 if (retval == IO_ERROR) {
1357                         reiserfs_warning(inode->i_sb,
1358                                          "vs-13050: reiserfs_update_sd: "
1359                                          "i/o failure occurred trying to update %K stat data",
1360                                          &key);
1361                         return;
1362                 }
1363                 if (retval == ITEM_NOT_FOUND) {
1364                         pos = PATH_LAST_POSITION(&path);
1365                         pathrelse(&path);
1366                         if (inode->i_nlink == 0) {
1367                                 /*reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: i_nlink == 0, stat data not found"); */
1368                                 return;
1369                         }
1370                         reiserfs_warning(inode->i_sb,
1371                                          "vs-13060: reiserfs_update_sd: "
1372                                          "stat data of object %k (nlink == %d) not found (pos %d)",
1373                                          INODE_PKEY(inode), inode->i_nlink,
1374                                          pos);
1375                         reiserfs_check_path(&path);
1376                         return;
1377                 }
1378
1379                 /* sigh, prepare_for_journal might schedule.  When it schedules the
1380                  ** FS might change.  We have to detect that, and loop back to the
1381                  ** search if the stat data item has moved
1382                  */
1383                 bh = get_last_bh(&path);
1384                 ih = get_ih(&path);
1385                 copy_item_head(&tmp_ih, ih);
1386                 fs_gen = get_generation(inode->i_sb);
1387                 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
1388                 if (fs_changed(fs_gen, inode->i_sb)
1389                     && item_moved(&tmp_ih, &path)) {
1390                         reiserfs_restore_prepared_buffer(inode->i_sb, bh);
1391                         continue;       /* Stat_data item has been moved after scheduling. */
1392                 }
1393                 break;
1394         }
1395         update_stat_data(&path, inode, size);
1396         journal_mark_dirty(th, th->t_super, bh);
1397         pathrelse(&path);
1398         return;
1399 }
1400
1401 /* reiserfs_read_locked_inode is called to read the inode off disk, and it
1402 ** does a make_bad_inode when things go wrong.  But, we need to make sure
1403 ** and clear the key in the private portion of the inode, otherwise a
1404 ** corresponding iput might try to delete whatever object the inode last
1405 ** represented.
1406 */
1407 static void reiserfs_make_bad_inode(struct inode *inode)
1408 {
1409         memset(INODE_PKEY(inode), 0, KEY_SIZE);
1410         make_bad_inode(inode);
1411 }
1412
1413 //
1414 // initially this function was derived from minix or ext2's analog and
1415 // evolved as the prototype did
1416 //
1417
1418 int reiserfs_init_locked_inode(struct inode *inode, void *p)
1419 {
1420         struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p;
1421         inode->i_ino = args->objectid;
1422         INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->dirid);
1423         return 0;
1424 }
1425
1426 /* looks for stat data in the tree, and fills up the fields of in-core
1427    inode stat data fields */
1428 void reiserfs_read_locked_inode(struct inode *inode,
1429                                 struct reiserfs_iget_args *args)
1430 {
1431         INITIALIZE_PATH(path_to_sd);
1432         struct cpu_key key;
1433         unsigned long dirino;
1434         int retval;
1435
1436         dirino = args->dirid;
1437
1438         /* set version 1, version 2 could be used too, because stat data
1439            key is the same in both versions */
1440         key.version = KEY_FORMAT_3_5;
1441         key.on_disk_key.k_dir_id = dirino;
1442         key.on_disk_key.k_objectid = inode->i_ino;
1443         key.on_disk_key.k_offset = 0;
1444         key.on_disk_key.k_type = 0;
1445
1446         /* look for the object's stat data */
1447         retval = search_item(inode->i_sb, &key, &path_to_sd);
1448         if (retval == IO_ERROR) {
1449                 reiserfs_warning(inode->i_sb,
1450                                  "vs-13070: reiserfs_read_locked_inode: "
1451                                  "i/o failure occurred trying to find stat data of %K",
1452                                  &key);
1453                 reiserfs_make_bad_inode(inode);
1454                 return;
1455         }
1456         if (retval != ITEM_FOUND) {
1457                 /* a stale NFS handle can trigger this without it being an error */
1458                 pathrelse(&path_to_sd);
1459                 reiserfs_make_bad_inode(inode);
1460                 inode->i_nlink = 0;
1461                 return;
1462         }
1463
1464         init_inode(inode, &path_to_sd);
1465
1466         /* It is possible that knfsd is trying to access inode of a file
1467            that is being removed from the disk by some other thread. As we
1468            update sd on unlink all that is required is to check for nlink
1469            here. This bug was first found by Sizif when debugging
1470            SquidNG/Butterfly, forgotten, and found again after Philippe
1471            Gramoulle <philippe.gramoulle@mmania.com> reproduced it.
1472
1473            More logical fix would require changes in fs/inode.c:iput() to
1474            remove inode from hash-table _after_ fs cleaned disk stuff up and
1475            in iget() to return NULL if I_FREEING inode is found in
1476            hash-table. */
1477         /* Currently there is one place where it's ok to meet inode with
1478            nlink==0: processing of open-unlinked and half-truncated files
1479            during mount (fs/reiserfs/super.c:finish_unfinished()). */
1480         if ((inode->i_nlink == 0) &&
1481             !REISERFS_SB(inode->i_sb)->s_is_unlinked_ok) {
1482                 reiserfs_warning(inode->i_sb,
1483                                  "vs-13075: reiserfs_read_locked_inode: "
1484                                  "dead inode read from disk %K. "
1485                                  "This is likely to be race with knfsd. Ignore",
1486                                  &key);
1487                 reiserfs_make_bad_inode(inode);
1488         }
1489
1490         reiserfs_check_path(&path_to_sd);       /* init inode should be relsing */
1491
1492 }
1493
1494 /**
1495  * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked().
1496  *
1497  * @inode:    inode from hash table to check
1498  * @opaque:   "cookie" passed to iget5_locked(). This is &reiserfs_iget_args.
1499  *
1500  * This function is called by iget5_locked() to distinguish reiserfs inodes
1501  * having the same inode numbers. Such inodes can only exist due to some
1502  * error condition. One of them should be bad. Inodes with identical
1503  * inode numbers (objectids) are distinguished by parent directory ids.
1504  *
1505  */
1506 int reiserfs_find_actor(struct inode *inode, void *opaque)
1507 {
1508         struct reiserfs_iget_args *args;
1509
1510         args = opaque;
1511         /* args is already in CPU order */
1512         return (inode->i_ino == args->objectid) &&
1513             (le32_to_cpu(INODE_PKEY(inode)->k_dir_id) == args->dirid);
1514 }
1515
1516 struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key)
1517 {
1518         struct inode *inode;
1519         struct reiserfs_iget_args args;
1520
1521         args.objectid = key->on_disk_key.k_objectid;
1522         args.dirid = key->on_disk_key.k_dir_id;
1523         inode = iget5_locked(s, key->on_disk_key.k_objectid,
1524                              reiserfs_find_actor, reiserfs_init_locked_inode,
1525                              (void *)(&args));
1526         if (!inode)
1527                 return ERR_PTR(-ENOMEM);
1528
1529         if (inode->i_state & I_NEW) {
1530                 reiserfs_read_locked_inode(inode, &args);
1531                 unlock_new_inode(inode);
1532         }
1533
1534         if (comp_short_keys(INODE_PKEY(inode), key) || is_bad_inode(inode)) {
1535                 /* either due to i/o error or a stale NFS handle */
1536                 iput(inode);
1537                 inode = NULL;
1538         }
1539         return inode;
1540 }
1541
1542 struct dentry *reiserfs_get_dentry(struct super_block *sb, void *vobjp)
1543 {
1544         __u32 *data = vobjp;
1545         struct cpu_key key;
1546         struct dentry *result;
1547         struct inode *inode;
1548
1549         key.on_disk_key.k_objectid = data[0];
1550         key.on_disk_key.k_dir_id = data[1];
1551         reiserfs_write_lock(sb);
1552         inode = reiserfs_iget(sb, &key);
1553         if (inode && !IS_ERR(inode) && data[2] != 0 &&
1554             data[2] != inode->i_generation) {
1555                 iput(inode);
1556                 inode = NULL;
1557         }
1558         reiserfs_write_unlock(sb);
1559         if (!inode)
1560                 inode = ERR_PTR(-ESTALE);
1561         if (IS_ERR(inode))
1562                 return ERR_PTR(PTR_ERR(inode));
1563         result = d_alloc_anon(inode);
1564         if (!result) {
1565                 iput(inode);
1566                 return ERR_PTR(-ENOMEM);
1567         }
1568         return result;
1569 }
1570
1571 struct dentry *reiserfs_decode_fh(struct super_block *sb, __u32 * data,
1572                                   int len, int fhtype,
1573                                   int (*acceptable) (void *contect,
1574                                                      struct dentry * de),
1575                                   void *context)
1576 {
1577         __u32 obj[3], parent[3];
1578
1579         /* fhtype happens to reflect the number of u32s encoded.
1580          * due to a bug in earlier code, fhtype might indicate there
1581          * are more u32s then actually fitted.
1582          * so if fhtype seems to be more than len, reduce fhtype.
1583          * Valid types are:
1584          *   2 - objectid + dir_id - legacy support
1585          *   3 - objectid + dir_id + generation
1586          *   4 - objectid + dir_id + objectid and dirid of parent - legacy
1587          *   5 - objectid + dir_id + generation + objectid and dirid of parent
1588          *   6 - as above plus generation of directory
1589          * 6 does not fit in NFSv2 handles
1590          */
1591         if (fhtype > len) {
1592                 if (fhtype != 6 || len != 5)
1593                         reiserfs_warning(sb,
1594                                          "nfsd/reiserfs, fhtype=%d, len=%d - odd",
1595                                          fhtype, len);
1596                 fhtype = 5;
1597         }
1598
1599         obj[0] = data[0];
1600         obj[1] = data[1];
1601         if (fhtype == 3 || fhtype >= 5)
1602                 obj[2] = data[2];
1603         else
1604                 obj[2] = 0;     /* generation number */
1605
1606         if (fhtype >= 4) {
1607                 parent[0] = data[fhtype >= 5 ? 3 : 2];
1608                 parent[1] = data[fhtype >= 5 ? 4 : 3];
1609                 if (fhtype == 6)
1610                         parent[2] = data[5];
1611                 else
1612                         parent[2] = 0;
1613         }
1614         return sb->s_export_op->find_exported_dentry(sb, obj,
1615                                                      fhtype < 4 ? NULL : parent,
1616                                                      acceptable, context);
1617 }
1618
1619 int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
1620                        int need_parent)
1621 {
1622         struct inode *inode = dentry->d_inode;
1623         int maxlen = *lenp;
1624
1625         if (maxlen < 3)
1626                 return 255;
1627
1628         data[0] = inode->i_ino;
1629         data[1] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1630         data[2] = inode->i_generation;
1631         *lenp = 3;
1632         /* no room for directory info? return what we've stored so far */
1633         if (maxlen < 5 || !need_parent)
1634                 return 3;
1635
1636         spin_lock(&dentry->d_lock);
1637         inode = dentry->d_parent->d_inode;
1638         data[3] = inode->i_ino;
1639         data[4] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1640         *lenp = 5;
1641         if (maxlen >= 6) {
1642                 data[5] = inode->i_generation;
1643                 *lenp = 6;
1644         }
1645         spin_unlock(&dentry->d_lock);
1646         return *lenp;
1647 }
1648
1649 /* looks for stat data, then copies fields to it, marks the buffer
1650    containing stat data as dirty */
1651 /* reiserfs inodes are never really dirty, since the dirty inode call
1652 ** always logs them.  This call allows the VFS inode marking routines
1653 ** to properly mark inodes for datasync and such, but only actually
1654 ** does something when called for a synchronous update.
1655 */
1656 int reiserfs_write_inode(struct inode *inode, int do_sync)
1657 {
1658         struct reiserfs_transaction_handle th;
1659         int jbegin_count = 1;
1660
1661         if (inode->i_sb->s_flags & MS_RDONLY)
1662                 return -EROFS;
1663         /* memory pressure can sometimes initiate write_inode calls with sync == 1,
1664          ** these cases are just when the system needs ram, not when the
1665          ** inode needs to reach disk for safety, and they can safely be
1666          ** ignored because the altered inode has already been logged.
1667          */
1668         if (do_sync && !(current->flags & PF_MEMALLOC)) {
1669                 reiserfs_write_lock(inode->i_sb);
1670                 if (!journal_begin(&th, inode->i_sb, jbegin_count)) {
1671                         reiserfs_update_sd(&th, inode);
1672                         journal_end_sync(&th, inode->i_sb, jbegin_count);
1673                 }
1674                 reiserfs_write_unlock(inode->i_sb);
1675         }
1676         return 0;
1677 }
1678
1679 /* stat data of new object is inserted already, this inserts the item
1680    containing "." and ".." entries */
1681 static int reiserfs_new_directory(struct reiserfs_transaction_handle *th,
1682                                   struct inode *inode,
1683                                   struct item_head *ih, struct path *path,
1684                                   struct inode *dir)
1685 {
1686         struct super_block *sb = th->t_super;
1687         char empty_dir[EMPTY_DIR_SIZE];
1688         char *body = empty_dir;
1689         struct cpu_key key;
1690         int retval;
1691
1692         BUG_ON(!th->t_trans_id);
1693
1694         _make_cpu_key(&key, KEY_FORMAT_3_5, le32_to_cpu(ih->ih_key.k_dir_id),
1695                       le32_to_cpu(ih->ih_key.k_objectid), DOT_OFFSET,
1696                       TYPE_DIRENTRY, 3 /*key length */ );
1697
1698         /* compose item head for new item. Directories consist of items of
1699            old type (ITEM_VERSION_1). Do not set key (second arg is 0), it
1700            is done by reiserfs_new_inode */
1701         if (old_format_only(sb)) {
1702                 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
1703                                   TYPE_DIRENTRY, EMPTY_DIR_SIZE_V1, 2);
1704
1705                 make_empty_dir_item_v1(body, ih->ih_key.k_dir_id,
1706                                        ih->ih_key.k_objectid,
1707                                        INODE_PKEY(dir)->k_dir_id,
1708                                        INODE_PKEY(dir)->k_objectid);
1709         } else {
1710                 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
1711                                   TYPE_DIRENTRY, EMPTY_DIR_SIZE, 2);
1712
1713                 make_empty_dir_item(body, ih->ih_key.k_dir_id,
1714                                     ih->ih_key.k_objectid,
1715                                     INODE_PKEY(dir)->k_dir_id,
1716                                     INODE_PKEY(dir)->k_objectid);
1717         }
1718
1719         /* look for place in the tree for new item */
1720         retval = search_item(sb, &key, path);
1721         if (retval == IO_ERROR) {
1722                 reiserfs_warning(sb, "vs-13080: reiserfs_new_directory: "
1723                                  "i/o failure occurred creating new directory");
1724                 return -EIO;
1725         }
1726         if (retval == ITEM_FOUND) {
1727                 pathrelse(path);
1728                 reiserfs_warning(sb, "vs-13070: reiserfs_new_directory: "
1729                                  "object with this key exists (%k)",
1730                                  &(ih->ih_key));
1731                 return -EEXIST;
1732         }
1733
1734         /* insert item, that is empty directory item */
1735         return reiserfs_insert_item(th, path, &key, ih, inode, body);
1736 }
1737
1738 /* stat data of object has been inserted, this inserts the item
1739    containing the body of symlink */
1740 static int reiserfs_new_symlink(struct reiserfs_transaction_handle *th, struct inode *inode,    /* Inode of symlink */
1741                                 struct item_head *ih,
1742                                 struct path *path, const char *symname,
1743                                 int item_len)
1744 {
1745         struct super_block *sb = th->t_super;
1746         struct cpu_key key;
1747         int retval;
1748
1749         BUG_ON(!th->t_trans_id);
1750
1751         _make_cpu_key(&key, KEY_FORMAT_3_5,
1752                       le32_to_cpu(ih->ih_key.k_dir_id),
1753                       le32_to_cpu(ih->ih_key.k_objectid),
1754                       1, TYPE_DIRECT, 3 /*key length */ );
1755
1756         make_le_item_head(ih, NULL, KEY_FORMAT_3_5, 1, TYPE_DIRECT, item_len,
1757                           0 /*free_space */ );
1758
1759         /* look for place in the tree for new item */
1760         retval = search_item(sb, &key, path);
1761         if (retval == IO_ERROR) {
1762                 reiserfs_warning(sb, "vs-13080: reiserfs_new_symlinik: "
1763                                  "i/o failure occurred creating new symlink");
1764                 return -EIO;
1765         }
1766         if (retval == ITEM_FOUND) {
1767                 pathrelse(path);
1768                 reiserfs_warning(sb, "vs-13080: reiserfs_new_symlink: "
1769                                  "object with this key exists (%k)",
1770                                  &(ih->ih_key));
1771                 return -EEXIST;
1772         }
1773
1774         /* insert item, that is body of symlink */
1775         return reiserfs_insert_item(th, path, &key, ih, inode, symname);
1776 }
1777
1778 /* inserts the stat data into the tree, and then calls
1779    reiserfs_new_directory (to insert ".", ".." item if new object is
1780    directory) or reiserfs_new_symlink (to insert symlink body if new
1781    object is symlink) or nothing (if new object is regular file)
1782
1783    NOTE! uid and gid must already be set in the inode.  If we return
1784    non-zero due to an error, we have to drop the quota previously allocated
1785    for the fresh inode.  This can only be done outside a transaction, so
1786    if we return non-zero, we also end the transaction.  */
1787 int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
1788                        struct inode *dir, int mode, const char *symname,
1789                        /* 0 for regular, EMTRY_DIR_SIZE for dirs,
1790                           strlen (symname) for symlinks) */
1791                        loff_t i_size, struct dentry *dentry,
1792                        struct inode *inode)
1793 {
1794         struct super_block *sb;
1795         INITIALIZE_PATH(path_to_key);
1796         struct cpu_key key;
1797         struct item_head ih;
1798         struct stat_data sd;
1799         int retval;
1800         int err;
1801
1802         BUG_ON(!th->t_trans_id);
1803
1804         if (DLIMIT_ALLOC_INODE(inode)) {
1805                 err = -ENOSPC;
1806                 goto out_bad_dlimit;
1807         }
1808         if (DQUOT_ALLOC_INODE(inode)) {
1809                 err = -EDQUOT;
1810                 goto out_end_trans;
1811         }
1812         if (!dir || !dir->i_nlink) {
1813                 err = -EPERM;
1814                 goto out_bad_inode;
1815         }
1816
1817         sb = dir->i_sb;
1818
1819         /* item head of new item */
1820         ih.ih_key.k_dir_id = reiserfs_choose_packing(dir);
1821         ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th));
1822         if (!ih.ih_key.k_objectid) {
1823                 err = -ENOMEM;
1824                 goto out_bad_inode;
1825         }
1826         if (old_format_only(sb))
1827                 /* not a perfect generation count, as object ids can be reused, but
1828                  ** this is as good as reiserfs can do right now.
1829                  ** note that the private part of inode isn't filled in yet, we have
1830                  ** to use the directory.
1831                  */
1832                 inode->i_generation = le32_to_cpu(INODE_PKEY(dir)->k_objectid);
1833         else
1834 #if defined( USE_INODE_GENERATION_COUNTER )
1835                 inode->i_generation =
1836                     le32_to_cpu(REISERFS_SB(sb)->s_rs->s_inode_generation);
1837 #else
1838                 inode->i_generation = ++event;
1839 #endif
1840
1841         /* fill stat data */
1842         inode->i_nlink = (S_ISDIR(mode) ? 2 : 1);
1843
1844         /* uid and gid must already be set by the caller for quota init */
1845
1846         /* symlink cannot be immutable or append only, right? */
1847         if (S_ISLNK(inode->i_mode))
1848                 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND);
1849
1850         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
1851         inode->i_size = i_size;
1852         inode->i_blocks = 0;
1853         inode->i_bytes = 0;
1854         REISERFS_I(inode)->i_first_direct_byte = S_ISLNK(mode) ? 1 :
1855             U32_MAX /*NO_BYTES_IN_DIRECT_ITEM */ ;
1856
1857         INIT_LIST_HEAD(&(REISERFS_I(inode)->i_prealloc_list));
1858         REISERFS_I(inode)->i_flags = 0;
1859         REISERFS_I(inode)->i_prealloc_block = 0;
1860         REISERFS_I(inode)->i_prealloc_count = 0;
1861         REISERFS_I(inode)->i_trans_id = 0;
1862         REISERFS_I(inode)->i_jl = NULL;
1863         REISERFS_I(inode)->i_attrs =
1864             REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK;
1865         sd_attrs_to_i_attrs(REISERFS_I(inode)->i_attrs, inode);
1866         REISERFS_I(inode)->i_acl_access = NULL;
1867         REISERFS_I(inode)->i_acl_default = NULL;
1868         init_rwsem(&REISERFS_I(inode)->xattr_sem);
1869
1870         if (old_format_only(sb))
1871                 make_le_item_head(&ih, NULL, KEY_FORMAT_3_5, SD_OFFSET,
1872                                   TYPE_STAT_DATA, SD_V1_SIZE, MAX_US_INT);
1873         else
1874                 make_le_item_head(&ih, NULL, KEY_FORMAT_3_6, SD_OFFSET,
1875                                   TYPE_STAT_DATA, SD_SIZE, MAX_US_INT);
1876
1877         /* key to search for correct place for new stat data */
1878         _make_cpu_key(&key, KEY_FORMAT_3_6, le32_to_cpu(ih.ih_key.k_dir_id),
1879                       le32_to_cpu(ih.ih_key.k_objectid), SD_OFFSET,
1880                       TYPE_STAT_DATA, 3 /*key length */ );
1881
1882         /* find proper place for inserting of stat data */
1883         retval = search_item(sb, &key, &path_to_key);
1884         if (retval == IO_ERROR) {
1885                 err = -EIO;
1886                 goto out_bad_inode;
1887         }
1888         if (retval == ITEM_FOUND) {
1889                 pathrelse(&path_to_key);
1890                 err = -EEXIST;
1891                 goto out_bad_inode;
1892         }
1893         if (old_format_only(sb)) {
1894                 if (inode->i_uid & ~0xffff || inode->i_gid & ~0xffff) {
1895                         pathrelse(&path_to_key);
1896                         /* i_uid or i_gid is too big to be stored in stat data v3.5 */
1897                         err = -EINVAL;
1898                         goto out_bad_inode;
1899                 }
1900                 inode2sd_v1(&sd, inode, inode->i_size);
1901         } else {
1902                 inode2sd(&sd, inode, inode->i_size);
1903         }
1904         // these do not go to on-disk stat data
1905         inode->i_ino = le32_to_cpu(ih.ih_key.k_objectid);
1906         inode->i_blksize = reiserfs_default_io_size;
1907
1908         // store in in-core inode the key of stat data and version all
1909         // object items will have (directory items will have old offset
1910         // format, other new objects will consist of new items)
1911         memcpy(INODE_PKEY(inode), &(ih.ih_key), KEY_SIZE);
1912         if (old_format_only(sb) || S_ISDIR(mode) || S_ISLNK(mode))
1913                 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1914         else
1915                 set_inode_item_key_version(inode, KEY_FORMAT_3_6);
1916         if (old_format_only(sb))
1917                 set_inode_sd_version(inode, STAT_DATA_V1);
1918         else
1919                 set_inode_sd_version(inode, STAT_DATA_V2);
1920
1921         /* insert the stat data into the tree */
1922 #ifdef DISPLACE_NEW_PACKING_LOCALITIES
1923         if (REISERFS_I(dir)->new_packing_locality)
1924                 th->displace_new_blocks = 1;
1925 #endif
1926         retval =
1927             reiserfs_insert_item(th, &path_to_key, &key, &ih, inode,
1928                                  (char *)(&sd));
1929         if (retval) {
1930                 err = retval;
1931                 reiserfs_check_path(&path_to_key);
1932                 goto out_bad_inode;
1933         }
1934 #ifdef DISPLACE_NEW_PACKING_LOCALITIES
1935         if (!th->displace_new_blocks)
1936                 REISERFS_I(dir)->new_packing_locality = 0;
1937 #endif
1938         if (S_ISDIR(mode)) {
1939                 /* insert item with "." and ".." */
1940                 retval =
1941                     reiserfs_new_directory(th, inode, &ih, &path_to_key, dir);
1942         }
1943
1944         if (S_ISLNK(mode)) {
1945                 /* insert body of symlink */
1946                 if (!old_format_only(sb))
1947                         i_size = ROUND_UP(i_size);
1948                 retval =
1949                     reiserfs_new_symlink(th, inode, &ih, &path_to_key, symname,
1950                                          i_size);
1951         }
1952         if (retval) {
1953                 err = retval;
1954                 reiserfs_check_path(&path_to_key);
1955                 journal_end(th, th->t_super, th->t_blocks_allocated);
1956                 goto out_inserted_sd;
1957         }
1958
1959         /* XXX CHECK THIS */
1960         if (reiserfs_posixacl(inode->i_sb)) {
1961                 retval = reiserfs_inherit_default_acl(dir, dentry, inode);
1962                 if (retval) {
1963                         err = retval;
1964                         reiserfs_check_path(&path_to_key);
1965                         journal_end(th, th->t_super, th->t_blocks_allocated);
1966                         goto out_inserted_sd;
1967                 }
1968         } else if (inode->i_sb->s_flags & MS_POSIXACL) {
1969                 reiserfs_warning(inode->i_sb, "ACLs aren't enabled in the fs, "
1970                                  "but vfs thinks they are!");
1971         } else if (is_reiserfs_priv_object(dir)) {
1972                 reiserfs_mark_inode_private(inode);
1973         }
1974
1975         insert_inode_hash(inode);
1976         reiserfs_update_sd(th, inode);
1977         reiserfs_check_path(&path_to_key);
1978
1979         return 0;
1980
1981 /* it looks like you can easily compress these two goto targets into
1982  * one.  Keeping it like this doesn't actually hurt anything, and they
1983  * are place holders for what the quota code actually needs.
1984  */
1985       out_bad_inode:
1986         /* Invalidate the object, nothing was inserted yet */
1987         INODE_PKEY(inode)->k_objectid = 0;
1988
1989         /* Quota change must be inside a transaction for journaling */
1990         DQUOT_FREE_INODE(inode);
1991
1992       out_end_trans:
1993         DLIMIT_FREE_INODE(inode);
1994
1995       out_bad_dlimit:
1996         journal_end(th, th->t_super, th->t_blocks_allocated);
1997         /* Drop can be outside and it needs more credits so it's better to have it outside */
1998         DQUOT_DROP(inode);
1999         inode->i_flags |= S_NOQUOTA;
2000         make_bad_inode(inode);
2001
2002       out_inserted_sd:
2003         inode->i_nlink = 0;
2004         th->t_trans_id = 0;     /* so the caller can't use this handle later */
2005
2006         /* If we were inheriting an ACL, we need to release the lock so that
2007          * iput doesn't deadlock in reiserfs_delete_xattrs. The locking
2008          * code really needs to be reworked, but this will take care of it
2009          * for now. -jeffm */
2010         if (REISERFS_I(dir)->i_acl_default && !IS_ERR(REISERFS_I(dir)->i_acl_default)) {
2011                 reiserfs_write_unlock_xattrs(dir->i_sb);
2012                 iput(inode);
2013                 reiserfs_write_lock_xattrs(dir->i_sb);
2014         } else
2015                 iput(inode);
2016         return err;
2017 }
2018
2019 /*
2020 ** finds the tail page in the page cache,
2021 ** reads the last block in.
2022 **
2023 ** On success, page_result is set to a locked, pinned page, and bh_result
2024 ** is set to an up to date buffer for the last block in the file.  returns 0.
2025 **
2026 ** tail conversion is not done, so bh_result might not be valid for writing
2027 ** check buffer_mapped(bh_result) and bh_result->b_blocknr != 0 before
2028 ** trying to write the block.
2029 **
2030 ** on failure, nonzero is returned, page_result and bh_result are untouched.
2031 */
2032 static int grab_tail_page(struct inode *p_s_inode,
2033                           struct page **page_result,
2034                           struct buffer_head **bh_result)
2035 {
2036
2037         /* we want the page with the last byte in the file,
2038          ** not the page that will hold the next byte for appending
2039          */
2040         unsigned long index = (p_s_inode->i_size - 1) >> PAGE_CACHE_SHIFT;
2041         unsigned long pos = 0;
2042         unsigned long start = 0;
2043         unsigned long blocksize = p_s_inode->i_sb->s_blocksize;
2044         unsigned long offset = (p_s_inode->i_size) & (PAGE_CACHE_SIZE - 1);
2045         struct buffer_head *bh;
2046         struct buffer_head *head;
2047         struct page *page;
2048         int error;
2049
2050         /* we know that we are only called with inode->i_size > 0.
2051          ** we also know that a file tail can never be as big as a block
2052          ** If i_size % blocksize == 0, our file is currently block aligned
2053          ** and it won't need converting or zeroing after a truncate.
2054          */
2055         if ((offset & (blocksize - 1)) == 0) {
2056                 return -ENOENT;
2057         }
2058         page = grab_cache_page(p_s_inode->i_mapping, index);
2059         error = -ENOMEM;
2060         if (!page) {
2061                 goto out;
2062         }
2063         /* start within the page of the last block in the file */
2064         start = (offset / blocksize) * blocksize;
2065
2066         error = block_prepare_write(page, start, offset,
2067                                     reiserfs_get_block_create_0);
2068         if (error)
2069                 goto unlock;
2070
2071         head = page_buffers(page);
2072         bh = head;
2073         do {
2074                 if (pos >= start) {
2075                         break;
2076                 }
2077                 bh = bh->b_this_page;
2078                 pos += blocksize;
2079         } while (bh != head);
2080
2081         if (!buffer_uptodate(bh)) {
2082                 /* note, this should never happen, prepare_write should
2083                  ** be taking care of this for us.  If the buffer isn't up to date,
2084                  ** I've screwed up the code to find the buffer, or the code to
2085                  ** call prepare_write
2086                  */
2087                 reiserfs_warning(p_s_inode->i_sb,
2088                                  "clm-6000: error reading block %lu on dev %s",
2089                                  bh->b_blocknr,
2090                                  reiserfs_bdevname(p_s_inode->i_sb));
2091                 error = -EIO;
2092                 goto unlock;
2093         }
2094         *bh_result = bh;
2095         *page_result = page;
2096
2097       out:
2098         return error;
2099
2100       unlock:
2101         unlock_page(page);
2102         page_cache_release(page);
2103         return error;
2104 }
2105
2106 /*
2107 ** vfs version of truncate file.  Must NOT be called with
2108 ** a transaction already started.
2109 **
2110 ** some code taken from block_truncate_page
2111 */
2112 int reiserfs_truncate_file(struct inode *p_s_inode, int update_timestamps)
2113 {
2114         struct reiserfs_transaction_handle th;
2115         /* we want the offset for the first byte after the end of the file */
2116         unsigned long offset = p_s_inode->i_size & (PAGE_CACHE_SIZE - 1);
2117         unsigned blocksize = p_s_inode->i_sb->s_blocksize;
2118         unsigned length;
2119         struct page *page = NULL;
2120         int error;
2121         struct buffer_head *bh = NULL;
2122         int err2;
2123
2124         reiserfs_write_lock(p_s_inode->i_sb);
2125
2126         if (p_s_inode->i_size > 0) {
2127                 if ((error = grab_tail_page(p_s_inode, &page, &bh))) {
2128                         // -ENOENT means we truncated past the end of the file,
2129                         // and get_block_create_0 could not find a block to read in,
2130                         // which is ok.
2131                         if (error != -ENOENT)
2132                                 reiserfs_warning(p_s_inode->i_sb,
2133                                                  "clm-6001: grab_tail_page failed %d",
2134                                                  error);
2135                         page = NULL;
2136                         bh = NULL;
2137                 }
2138         }
2139
2140         /* so, if page != NULL, we have a buffer head for the offset at
2141          ** the end of the file. if the bh is mapped, and bh->b_blocknr != 0,
2142          ** then we have an unformatted node.  Otherwise, we have a direct item,
2143          ** and no zeroing is required on disk.  We zero after the truncate,
2144          ** because the truncate might pack the item anyway
2145          ** (it will unmap bh if it packs).
2146          */
2147         /* it is enough to reserve space in transaction for 2 balancings:
2148            one for "save" link adding and another for the first
2149            cut_from_item. 1 is for update_sd */
2150         error = journal_begin(&th, p_s_inode->i_sb,
2151                               JOURNAL_PER_BALANCE_CNT * 2 + 1);
2152         if (error)
2153                 goto out;
2154         reiserfs_update_inode_transaction(p_s_inode);
2155         if (update_timestamps)
2156                 /* we are doing real truncate: if the system crashes before the last
2157                    transaction of truncating gets committed - on reboot the file
2158                    either appears truncated properly or not truncated at all */
2159                 add_save_link(&th, p_s_inode, 1);
2160         err2 = reiserfs_do_truncate(&th, p_s_inode, page, update_timestamps);
2161         error =
2162             journal_end(&th, p_s_inode->i_sb, JOURNAL_PER_BALANCE_CNT * 2 + 1);
2163         if (error)
2164                 goto out;
2165
2166         /* check reiserfs_do_truncate after ending the transaction */
2167         if (err2) {
2168                 error = err2;
2169                 goto out;
2170         }
2171
2172         if (update_timestamps) {
2173                 error = remove_save_link(p_s_inode, 1 /* truncate */ );
2174                 if (error)
2175                         goto out;
2176         }
2177
2178         if (page) {
2179                 length = offset & (blocksize - 1);
2180                 /* if we are not on a block boundary */
2181                 if (length) {
2182                         char *kaddr;
2183
2184                         length = blocksize - length;
2185                         kaddr = kmap_atomic(page, KM_USER0);
2186                         memset(kaddr + offset, 0, length);
2187                         flush_dcache_page(page);
2188                         kunmap_atomic(kaddr, KM_USER0);
2189                         if (buffer_mapped(bh) && bh->b_blocknr != 0) {
2190                                 mark_buffer_dirty(bh);
2191                         }
2192                 }
2193                 unlock_page(page);
2194                 page_cache_release(page);
2195         }
2196
2197         reiserfs_write_unlock(p_s_inode->i_sb);
2198         return 0;
2199       out:
2200         if (page) {
2201                 unlock_page(page);
2202                 page_cache_release(page);
2203         }
2204         reiserfs_write_unlock(p_s_inode->i_sb);
2205         return error;
2206 }
2207
2208 static int map_block_for_writepage(struct inode *inode,
2209                                    struct buffer_head *bh_result,
2210                                    unsigned long block)
2211 {
2212         struct reiserfs_transaction_handle th;
2213         int fs_gen;
2214         struct item_head tmp_ih;
2215         struct item_head *ih;
2216         struct buffer_head *bh;
2217         __le32 *item;
2218         struct cpu_key key;
2219         INITIALIZE_PATH(path);
2220         int pos_in_item;
2221         int jbegin_count = JOURNAL_PER_BALANCE_CNT;
2222         loff_t byte_offset = ((loff_t)block << inode->i_sb->s_blocksize_bits)+1;
2223         int retval;
2224         int use_get_block = 0;
2225         int bytes_copied = 0;
2226         int copy_size;
2227         int trans_running = 0;
2228
2229         /* catch places below that try to log something without starting a trans */
2230         th.t_trans_id = 0;
2231
2232         if (!buffer_uptodate(bh_result)) {
2233                 return -EIO;
2234         }
2235
2236         kmap(bh_result->b_page);
2237       start_over:
2238         reiserfs_write_lock(inode->i_sb);
2239         make_cpu_key(&key, inode, byte_offset, TYPE_ANY, 3);
2240
2241       research:
2242         retval = search_for_position_by_key(inode->i_sb, &key, &path);
2243         if (retval != POSITION_FOUND) {
2244                 use_get_block = 1;
2245                 goto out;
2246         }
2247
2248         bh = get_last_bh(&path);
2249         ih = get_ih(&path);
2250         item = get_item(&path);
2251         pos_in_item = path.pos_in_item;
2252
2253         /* we've found an unformatted node */
2254         if (indirect_item_found(retval, ih)) {
2255                 if (bytes_copied > 0) {
2256                         reiserfs_warning(inode->i_sb,
2257                                          "clm-6002: bytes_copied %d",
2258                                          bytes_copied);
2259                 }
2260                 if (!get_block_num(item, pos_in_item)) {
2261                         /* crap, we are writing to a hole */
2262                         use_get_block = 1;
2263                         goto out;
2264                 }
2265                 set_block_dev_mapped(bh_result,
2266                                      get_block_num(item, pos_in_item), inode);
2267         } else if (is_direct_le_ih(ih)) {
2268                 char *p;
2269                 p = page_address(bh_result->b_page);
2270                 p += (byte_offset - 1) & (PAGE_CACHE_SIZE - 1);
2271                 copy_size = ih_item_len(ih) - pos_in_item;
2272
2273                 fs_gen = get_generation(inode->i_sb);
2274                 copy_item_head(&tmp_ih, ih);
2275
2276                 if (!trans_running) {
2277                         /* vs-3050 is gone, no need to drop the path */
2278                         retval = journal_begin(&th, inode->i_sb, jbegin_count);
2279                         if (retval)
2280                                 goto out;
2281                         reiserfs_update_inode_transaction(inode);
2282                         trans_running = 1;
2283                         if (fs_changed(fs_gen, inode->i_sb)
2284                             && item_moved(&tmp_ih, &path)) {
2285                                 reiserfs_restore_prepared_buffer(inode->i_sb,
2286                                                                  bh);
2287                                 goto research;
2288                         }
2289                 }
2290
2291                 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
2292
2293                 if (fs_changed(fs_gen, inode->i_sb)
2294                     && item_moved(&tmp_ih, &path)) {
2295                         reiserfs_restore_prepared_buffer(inode->i_sb, bh);
2296                         goto research;
2297                 }
2298
2299                 memcpy(B_I_PITEM(bh, ih) + pos_in_item, p + bytes_copied,
2300                        copy_size);
2301
2302                 journal_mark_dirty(&th, inode->i_sb, bh);
2303                 bytes_copied += copy_size;
2304                 set_block_dev_mapped(bh_result, 0, inode);
2305
2306                 /* are there still bytes left? */
2307                 if (bytes_copied < bh_result->b_size &&
2308                     (byte_offset + bytes_copied) < inode->i_size) {
2309                         set_cpu_key_k_offset(&key,
2310                                              cpu_key_k_offset(&key) +
2311                                              copy_size);
2312                         goto research;
2313                 }
2314         } else {
2315                 reiserfs_warning(inode->i_sb,
2316                                  "clm-6003: bad item inode %lu, device %s",
2317                                  inode->i_ino, reiserfs_bdevname(inode->i_sb));
2318                 retval = -EIO;
2319                 goto out;
2320         }
2321         retval = 0;
2322
2323       out:
2324         pathrelse(&path);
2325         if (trans_running) {
2326                 int err = journal_end(&th, inode->i_sb, jbegin_count);
2327                 if (err)
2328                         retval = err;
2329                 trans_running = 0;
2330         }
2331         reiserfs_write_unlock(inode->i_sb);
2332
2333         /* this is where we fill in holes in the file. */
2334         if (use_get_block) {
2335                 retval = reiserfs_get_block(inode, block, bh_result,
2336                                             GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
2337                                             | GET_BLOCK_NO_DANGLE);
2338                 if (!retval) {
2339                         if (!buffer_mapped(bh_result)
2340                             || bh_result->b_blocknr == 0) {
2341                                 /* get_block failed to find a mapped unformatted node. */
2342                                 use_get_block = 0;
2343                                 goto start_over;
2344                         }
2345                 }
2346         }
2347         kunmap(bh_result->b_page);
2348
2349         if (!retval && buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
2350                 /* we've copied data from the page into the direct item, so the
2351                  * buffer in the page is now clean, mark it to reflect that.
2352                  */
2353                 lock_buffer(bh_result);
2354                 clear_buffer_dirty(bh_result);
2355                 unlock_buffer(bh_result);
2356         }
2357         return retval;
2358 }
2359
2360 /*
2361  * mason@suse.com: updated in 2.5.54 to follow the same general io
2362  * start/recovery path as __block_write_full_page, along with special
2363  * code to handle reiserfs tails.
2364  */
2365 static int reiserfs_write_full_page(struct page *page,
2366                                     struct writeback_control *wbc)
2367 {
2368         struct inode *inode = page->mapping->host;
2369         unsigned long end_index = inode->i_size >> PAGE_CACHE_SHIFT;
2370         int error = 0;
2371         unsigned long block;
2372         struct buffer_head *head, *bh;
2373         int partial = 0;
2374         int nr = 0;
2375         int checked = PageChecked(page);
2376         struct reiserfs_transaction_handle th;
2377         struct super_block *s = inode->i_sb;
2378         int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
2379         th.t_trans_id = 0;
2380
2381         /* no logging allowed when nonblocking or from PF_MEMALLOC */
2382         if (checked && (current->flags & PF_MEMALLOC)) {
2383                 redirty_page_for_writepage(wbc, page);
2384                 unlock_page(page);
2385                 return 0;
2386         }
2387
2388         /* The page dirty bit is cleared before writepage is called, which
2389          * means we have to tell create_empty_buffers to make dirty buffers
2390          * The page really should be up to date at this point, so tossing
2391          * in the BH_Uptodate is just a sanity check.
2392          */
2393         if (!page_has_buffers(page)) {
2394                 create_empty_buffers(page, s->s_blocksize,
2395                                      (1 << BH_Dirty) | (1 << BH_Uptodate));
2396         }
2397         head = page_buffers(page);
2398
2399         /* last page in the file, zero out any contents past the
2400          ** last byte in the file
2401          */
2402         if (page->index >= end_index) {
2403                 char *kaddr;
2404                 unsigned last_offset;
2405
2406                 last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
2407                 /* no file contents in this page */
2408                 if (page->index >= end_index + 1 || !last_offset) {
2409                         unlock_page(page);
2410                         return 0;
2411                 }
2412                 kaddr = kmap_atomic(page, KM_USER0);
2413                 memset(kaddr + last_offset, 0, PAGE_CACHE_SIZE - last_offset);
2414                 flush_dcache_page(page);
2415                 kunmap_atomic(kaddr, KM_USER0);
2416         }
2417         bh = head;
2418         block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits);
2419         /* first map all the buffers, logging any direct items we find */
2420         do {
2421                 if ((checked || buffer_dirty(bh)) && (!buffer_mapped(bh) ||
2422                                                       (buffer_mapped(bh)
2423                                                        && bh->b_blocknr ==
2424                                                        0))) {
2425                         /* not mapped yet, or it points to a direct item, search
2426                          * the btree for the mapping info, and log any direct
2427                          * items found
2428                          */
2429                         if ((error = map_block_for_writepage(inode, bh, block))) {
2430                                 goto fail;
2431                         }
2432                 }
2433                 bh = bh->b_this_page;
2434                 block++;
2435         } while (bh != head);
2436
2437         /*
2438          * we start the transaction after map_block_for_writepage,
2439          * because it can create holes in the file (an unbounded operation).
2440          * starting it here, we can make a reliable estimate for how many
2441          * blocks we're going to log
2442          */
2443         if (checked) {
2444                 ClearPageChecked(page);
2445                 reiserfs_write_lock(s);
2446                 error = journal_begin(&th, s, bh_per_page + 1);
2447                 if (error) {
2448                         reiserfs_write_unlock(s);
2449                         goto fail;
2450                 }
2451                 reiserfs_update_inode_transaction(inode);
2452         }
2453         /* now go through and lock any dirty buffers on the page */
2454         do {
2455                 get_bh(bh);
2456                 if (!buffer_mapped(bh))
2457                         continue;
2458                 if (buffer_mapped(bh) && bh->b_blocknr == 0)
2459                         continue;
2460
2461                 if (checked) {
2462                         reiserfs_prepare_for_journal(s, bh, 1);
2463                         journal_mark_dirty(&th, s, bh);
2464                         continue;
2465                 }
2466                 /* from this point on, we know the buffer is mapped to a
2467                  * real block and not a direct item
2468                  */
2469                 if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
2470                         lock_buffer(bh);
2471                 } else {
2472                         if (test_set_buffer_locked(bh)) {
2473                                 redirty_page_for_writepage(wbc, page);
2474                                 continue;
2475                         }
2476                 }
2477                 if (test_clear_buffer_dirty(bh)) {
2478                         mark_buffer_async_write(bh);
2479                 } else {
2480                         unlock_buffer(bh);
2481                 }
2482         } while ((bh = bh->b_this_page) != head);
2483
2484         if (checked) {
2485                 error = journal_end(&th, s, bh_per_page + 1);
2486                 reiserfs_write_unlock(s);
2487                 if (error)
2488                         goto fail;
2489         }
2490         BUG_ON(PageWriteback(page));
2491         set_page_writeback(page);
2492         unlock_page(page);
2493
2494         /*
2495          * since any buffer might be the only dirty buffer on the page,
2496          * the first submit_bh can bring the page out of writeback.
2497          * be careful with the buffers.
2498          */
2499         do {
2500                 struct buffer_head *next = bh->b_this_page;
2501                 if (buffer_async_write(bh)) {
2502                         submit_bh(WRITE, bh);
2503                         nr++;
2504                 }
2505                 put_bh(bh);
2506                 bh = next;
2507         } while (bh != head);
2508
2509         error = 0;
2510       done:
2511         if (nr == 0) {
2512                 /*
2513                  * if this page only had a direct item, it is very possible for
2514                  * no io to be required without there being an error.  Or,
2515                  * someone else could have locked them and sent them down the
2516                  * pipe without locking the page
2517                  */
2518                 bh = head;
2519                 do {
2520                         if (!buffer_uptodate(bh)) {
2521                                 partial = 1;
2522                                 break;
2523                         }
2524                         bh = bh->b_this_page;
2525                 } while (bh != head);
2526                 if (!partial)
2527                         SetPageUptodate(page);
2528                 end_page_writeback(page);
2529         }
2530         return error;
2531
2532       fail:
2533         /* catches various errors, we need to make sure any valid dirty blocks
2534          * get to the media.  The page is currently locked and not marked for
2535          * writeback
2536          */
2537         ClearPageUptodate(page);
2538         bh = head;
2539         do {
2540                 get_bh(bh);
2541                 if (buffer_mapped(bh) && buffer_dirty(bh) && bh->b_blocknr) {
2542                         lock_buffer(bh);
2543                         mark_buffer_async_write(bh);
2544                 } else {
2545                         /*
2546                          * clear any dirty bits that might have come from getting
2547                          * attached to a dirty page
2548                          */
2549                         clear_buffer_dirty(bh);
2550                 }
2551                 bh = bh->b_this_page;
2552         } while (bh != head);
2553         SetPageError(page);
2554         BUG_ON(PageWriteback(page));
2555         set_page_writeback(page);
2556         unlock_page(page);
2557         do {
2558                 struct buffer_head *next = bh->b_this_page;
2559                 if (buffer_async_write(bh)) {
2560                         clear_buffer_dirty(bh);
2561                         submit_bh(WRITE, bh);
2562                         nr++;
2563                 }
2564                 put_bh(bh);
2565                 bh = next;
2566         } while (bh != head);
2567         goto done;
2568 }
2569
2570 static int reiserfs_readpage(struct file *f, struct page *page)
2571 {
2572         return block_read_full_page(page, reiserfs_get_block);
2573 }
2574
2575 static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
2576 {
2577         struct inode *inode = page->mapping->host;
2578         reiserfs_wait_on_write_block(inode->i_sb);
2579         return reiserfs_write_full_page(page, wbc);
2580 }
2581
2582 static int reiserfs_prepare_write(struct file *f, struct page *page,
2583                                   unsigned from, unsigned to)
2584 {
2585         struct inode *inode = page->mapping->host;
2586         int ret;
2587         int old_ref = 0;
2588
2589         reiserfs_wait_on_write_block(inode->i_sb);
2590         fix_tail_page_for_writing(page);
2591         if (reiserfs_transaction_running(inode->i_sb)) {
2592                 struct reiserfs_transaction_handle *th;
2593                 th = (struct reiserfs_transaction_handle *)current->
2594                     journal_info;
2595                 BUG_ON(!th->t_refcount);
2596                 BUG_ON(!th->t_trans_id);
2597                 old_ref = th->t_refcount;
2598                 th->t_refcount++;
2599         }
2600
2601         ret = block_prepare_write(page, from, to, reiserfs_get_block);
2602         if (ret && reiserfs_transaction_running(inode->i_sb)) {
2603                 struct reiserfs_transaction_handle *th = current->journal_info;
2604                 /* this gets a little ugly.  If reiserfs_get_block returned an
2605                  * error and left a transacstion running, we've got to close it,
2606                  * and we've got to free handle if it was a persistent transaction.
2607                  *
2608                  * But, if we had nested into an existing transaction, we need
2609                  * to just drop the ref count on the handle.
2610                  *
2611                  * If old_ref == 0, the transaction is from reiserfs_get_block,
2612                  * and it was a persistent trans.  Otherwise, it was nested above.
2613                  */
2614                 if (th->t_refcount > old_ref) {
2615                         if (old_ref)
2616                                 th->t_refcount--;
2617                         else {
2618                                 int err;
2619                                 reiserfs_write_lock(inode->i_sb);
2620                                 err = reiserfs_end_persistent_transaction(th);
2621                                 reiserfs_write_unlock(inode->i_sb);
2622                                 if (err)
2623                                         ret = err;
2624                         }
2625                 }
2626         }
2627         return ret;
2628
2629 }
2630
2631 static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block)
2632 {
2633         return generic_block_bmap(as, block, reiserfs_bmap);
2634 }
2635
2636 static int reiserfs_commit_write(struct file *f, struct page *page,
2637                                  unsigned from, unsigned to)
2638 {
2639         struct inode *inode = page->mapping->host;
2640         loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + to;
2641         int ret = 0;
2642         int update_sd = 0;
2643         struct reiserfs_transaction_handle *th = NULL;
2644
2645         reiserfs_wait_on_write_block(inode->i_sb);
2646         if (reiserfs_transaction_running(inode->i_sb)) {
2647                 th = current->journal_info;
2648         }
2649         reiserfs_commit_page(inode, page, from, to);
2650
2651         /* generic_commit_write does this for us, but does not update the
2652          ** transaction tracking stuff when the size changes.  So, we have
2653          ** to do the i_size updates here.
2654          */
2655         if (pos > inode->i_size) {
2656                 struct reiserfs_transaction_handle myth;
2657                 reiserfs_write_lock(inode->i_sb);
2658                 /* If the file have grown beyond the border where it
2659                    can have a tail, unmark it as needing a tail
2660                    packing */
2661                 if ((have_large_tails(inode->i_sb)
2662                      && inode->i_size > i_block_size(inode) * 4)
2663                     || (have_small_tails(inode->i_sb)
2664                         && inode->i_size > i_block_size(inode)))
2665                         REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
2666
2667                 ret = journal_begin(&myth, inode->i_sb, 1);
2668                 if (ret) {
2669                         reiserfs_write_unlock(inode->i_sb);
2670                         goto journal_error;
2671                 }
2672                 reiserfs_update_inode_transaction(inode);
2673                 inode->i_size = pos;
2674                 /*
2675                  * this will just nest into our transaction.  It's important
2676                  * to use mark_inode_dirty so the inode gets pushed around on the
2677                  * dirty lists, and so that O_SYNC works as expected
2678                  */
2679                 mark_inode_dirty(inode);
2680                 reiserfs_update_sd(&myth, inode);
2681                 update_sd = 1;
2682                 ret = journal_end(&myth, inode->i_sb, 1);
2683                 reiserfs_write_unlock(inode->i_sb);
2684                 if (ret)
2685                         goto journal_error;
2686         }
2687         if (th) {
2688                 reiserfs_write_lock(inode->i_sb);
2689                 if (!update_sd)
2690                         mark_inode_dirty(inode);
2691                 ret = reiserfs_end_persistent_transaction(th);
2692                 reiserfs_write_unlock(inode->i_sb);
2693                 if (ret)
2694                         goto out;
2695         }
2696
2697       out:
2698         return ret;
2699
2700       journal_error:
2701         if (th) {
2702                 reiserfs_write_lock(inode->i_sb);
2703                 if (!update_sd)
2704                         reiserfs_update_sd(th, inode);
2705                 ret = reiserfs_end_persistent_transaction(th);
2706                 reiserfs_write_unlock(inode->i_sb);
2707         }
2708
2709         return ret;
2710 }
2711
2712 void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode)
2713 {
2714         if (reiserfs_attrs(inode->i_sb)) {
2715                 if (sd_attrs & REISERFS_SYNC_FL)
2716                         inode->i_flags |= S_SYNC;
2717                 else
2718                         inode->i_flags &= ~S_SYNC;
2719                 if (sd_attrs & REISERFS_IMMUTABLE_FL)
2720                         inode->i_flags |= S_IMMUTABLE;
2721                 else
2722                         inode->i_flags &= ~S_IMMUTABLE;
2723                 if (sd_attrs & REISERFS_IUNLINK_FL)
2724                         inode->i_flags |= S_IUNLINK;
2725                 else
2726                         inode->i_flags &= ~S_IUNLINK;
2727                 if (sd_attrs & REISERFS_BARRIER_FL)
2728                         inode->i_flags |= S_BARRIER;
2729                 else
2730                         inode->i_flags &= ~S_BARRIER;
2731                 if (sd_attrs & REISERFS_APPEND_FL)
2732                         inode->i_flags |= S_APPEND;
2733                 else
2734                         inode->i_flags &= ~S_APPEND;
2735                 if (sd_attrs & REISERFS_NOATIME_FL)
2736                         inode->i_flags |= S_NOATIME;
2737                 else
2738                         inode->i_flags &= ~S_NOATIME;
2739                 if (sd_attrs & REISERFS_NOTAIL_FL)
2740                         REISERFS_I(inode)->i_flags |= i_nopack_mask;
2741                 else
2742                         REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
2743         }
2744 }
2745
2746 void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs)
2747 {
2748         if (reiserfs_attrs(inode->i_sb)) {
2749                 if (inode->i_flags & S_IMMUTABLE)
2750                         *sd_attrs |= REISERFS_IMMUTABLE_FL;
2751                 else
2752                         *sd_attrs &= ~REISERFS_IMMUTABLE_FL;
2753                 if (inode->i_flags & S_IUNLINK)
2754                         *sd_attrs |= REISERFS_IUNLINK_FL;
2755                 else
2756                         *sd_attrs &= ~REISERFS_IUNLINK_FL;
2757                 if (inode->i_flags & S_BARRIER)
2758                         *sd_attrs |= REISERFS_BARRIER_FL;
2759                 else
2760                         *sd_attrs &= ~REISERFS_BARRIER_FL;
2761                 if (inode->i_flags & S_SYNC)
2762                         *sd_attrs |= REISERFS_SYNC_FL;
2763                 else
2764                         *sd_attrs &= ~REISERFS_SYNC_FL;
2765                 if (inode->i_flags & S_NOATIME)
2766                         *sd_attrs |= REISERFS_NOATIME_FL;
2767                 else
2768                         *sd_attrs &= ~REISERFS_NOATIME_FL;
2769                 if (REISERFS_I(inode)->i_flags & i_nopack_mask)
2770                         *sd_attrs |= REISERFS_NOTAIL_FL;
2771                 else
2772                         *sd_attrs &= ~REISERFS_NOTAIL_FL;
2773         }
2774 }
2775
2776 /* decide if this buffer needs to stay around for data logging or ordered
2777 ** write purposes
2778 */
2779 static int invalidatepage_can_drop(struct inode *inode, struct buffer_head *bh)
2780 {
2781         int ret = 1;
2782         struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
2783
2784         lock_buffer(bh);
2785         spin_lock(&j->j_dirty_buffers_lock);
2786         if (!buffer_mapped(bh)) {
2787                 goto free_jh;
2788         }
2789         /* the page is locked, and the only places that log a data buffer
2790          * also lock the page.
2791          */
2792         if (reiserfs_file_data_log(inode)) {
2793                 /*
2794                  * very conservative, leave the buffer pinned if
2795                  * anyone might need it.
2796                  */
2797                 if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
2798                         ret = 0;
2799                 }
2800         } else  if (buffer_dirty(bh)) {
2801                 struct reiserfs_journal_list *jl;
2802                 struct reiserfs_jh *jh = bh->b_private;
2803
2804                 /* why is this safe?
2805                  * reiserfs_setattr updates i_size in the on disk
2806                  * stat data before allowing vmtruncate to be called.
2807                  *
2808                  * If buffer was put onto the ordered list for this
2809                  * transaction, we know for sure either this transaction
2810                  * or an older one already has updated i_size on disk,
2811                  * and this ordered data won't be referenced in the file
2812                  * if we crash.
2813                  *
2814                  * if the buffer was put onto the ordered list for an older
2815                  * transaction, we need to leave it around
2816                  */
2817                 if (jh && (jl = jh->jl)
2818                     && jl != SB_JOURNAL(inode->i_sb)->j_current_jl)
2819                         ret = 0;
2820         }
2821       free_jh:
2822         if (ret && bh->b_private) {
2823                 reiserfs_free_jh(bh);
2824         }
2825         spin_unlock(&j->j_dirty_buffers_lock);
2826         unlock_buffer(bh);
2827         return ret;
2828 }
2829
2830 /* clm -- taken from fs/buffer.c:block_invalidate_page */
2831 static void reiserfs_invalidatepage(struct page *page, unsigned long offset)
2832 {
2833         struct buffer_head *head, *bh, *next;
2834         struct inode *inode = page->mapping->host;
2835         unsigned int curr_off = 0;
2836         int ret = 1;
2837
2838         BUG_ON(!PageLocked(page));
2839
2840         if (offset == 0)
2841                 ClearPageChecked(page);
2842
2843         if (!page_has_buffers(page))
2844                 goto out;
2845
2846         head = page_buffers(page);
2847         bh = head;
2848         do {
2849                 unsigned int next_off = curr_off + bh->b_size;
2850                 next = bh->b_this_page;
2851
2852                 /*
2853                  * is this block fully invalidated?
2854                  */
2855                 if (offset <= curr_off) {
2856                         if (invalidatepage_can_drop(inode, bh))
2857                                 reiserfs_unmap_buffer(bh);
2858                         else
2859                                 ret = 0;
2860                 }
2861                 curr_off = next_off;
2862                 bh = next;
2863         } while (bh != head);
2864
2865         /*
2866          * We release buffers only if the entire page is being invalidated.
2867          * The get_block cached value has been unconditionally invalidated,
2868          * so real IO is not possible anymore.
2869          */
2870         if (!offset && ret) {
2871                 ret = try_to_release_page(page, 0);
2872                 /* maybe should BUG_ON(!ret); - neilb */
2873         }
2874       out:
2875         return;
2876 }
2877
2878 static int reiserfs_set_page_dirty(struct page *page)
2879 {
2880         struct inode *inode = page->mapping->host;
2881         if (reiserfs_file_data_log(inode)) {
2882                 SetPageChecked(page);
2883                 return __set_page_dirty_nobuffers(page);
2884         }
2885         return __set_page_dirty_buffers(page);
2886 }
2887
2888 /*
2889  * Returns 1 if the page's buffers were dropped.  The page is locked.
2890  *
2891  * Takes j_dirty_buffers_lock to protect the b_assoc_buffers list_heads
2892  * in the buffers at page_buffers(page).
2893  *
2894  * even in -o notail mode, we can't be sure an old mount without -o notail
2895  * didn't create files with tails.
2896  */
2897 static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags)
2898 {
2899         struct inode *inode = page->mapping->host;
2900         struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
2901         struct buffer_head *head;
2902         struct buffer_head *bh;
2903         int ret = 1;
2904
2905         WARN_ON(PageChecked(page));
2906         spin_lock(&j->j_dirty_buffers_lock);
2907         head = page_buffers(page);
2908         bh = head;
2909         do {
2910                 if (bh->b_private) {
2911                         if (!buffer_dirty(bh) && !buffer_locked(bh)) {
2912                                 reiserfs_free_jh(bh);
2913                         } else {
2914                                 ret = 0;
2915                                 break;
2916                         }
2917                 }
2918                 bh = bh->b_this_page;
2919         } while (bh != head);
2920         if (ret)
2921                 ret = try_to_free_buffers(page);
2922         spin_unlock(&j->j_dirty_buffers_lock);
2923         return ret;
2924 }
2925
2926 /* We thank Mingming Cao for helping us understand in great detail what
2927    to do in this section of the code. */
2928 static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
2929                                   const struct iovec *iov, loff_t offset,
2930                                   unsigned long nr_segs)
2931 {
2932         struct file *file = iocb->ki_filp;
2933         struct inode *inode = file->f_mapping->host;
2934
2935         return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
2936                                   offset, nr_segs,
2937                                   reiserfs_get_blocks_direct_io, NULL);
2938 }
2939
2940 int reiserfs_sync_flags(struct inode *inode)
2941 {
2942         u16 oldflags, newflags;
2943
2944         oldflags = REISERFS_I(inode)->i_attrs;
2945         newflags = oldflags;
2946         i_attrs_to_sd_attrs(inode, &newflags);
2947
2948         if (oldflags ^ newflags) {
2949                 REISERFS_I(inode)->i_attrs = newflags;
2950                 inode->i_ctime = CURRENT_TIME_SEC;
2951                 mark_inode_dirty(inode);
2952         }
2953         return 0;
2954 }
2955
2956 int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
2957 {
2958         struct inode *inode = dentry->d_inode;
2959         int error;
2960         unsigned int ia_valid = attr->ia_valid;
2961         reiserfs_write_lock(inode->i_sb);
2962         if (attr->ia_valid & ATTR_SIZE) {
2963                 /* version 2 items will be caught by the s_maxbytes check
2964                  ** done for us in vmtruncate
2965                  */
2966                 if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
2967                     attr->ia_size > MAX_NON_LFS) {
2968                         error = -EFBIG;
2969                         goto out;
2970                 }
2971                 /* fill in hole pointers in the expanding truncate case. */
2972                 if (attr->ia_size > inode->i_size) {
2973                         error = generic_cont_expand(inode, attr->ia_size);
2974                         if (REISERFS_I(inode)->i_prealloc_count > 0) {
2975                                 int err;
2976                                 struct reiserfs_transaction_handle th;
2977                                 /* we're changing at most 2 bitmaps, inode + super */
2978                                 err = journal_begin(&th, inode->i_sb, 4);
2979                                 if (!err) {
2980                                         reiserfs_discard_prealloc(&th, inode);
2981                                         err = journal_end(&th, inode->i_sb, 4);
2982                                 }
2983                                 if (err)
2984                                         error = err;
2985                         }
2986                         if (error)
2987                                 goto out;
2988                 }
2989         }
2990
2991         if ((((attr->ia_valid & ATTR_UID) && (attr->ia_uid & ~0xffff)) ||
2992              ((attr->ia_valid & ATTR_GID) && (attr->ia_gid & ~0xffff))) &&
2993             (get_inode_sd_version(inode) == STAT_DATA_V1)) {
2994                 /* stat data of format v3.5 has 16 bit uid and gid */
2995                 error = -EINVAL;
2996                 goto out;
2997         }
2998
2999         error = inode_change_ok(inode, attr);
3000
3001         if (!error) {
3002                 if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
3003                     (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid) ||
3004                     (ia_valid & ATTR_XID && attr->ia_xid != inode->i_xid)) {
3005                         error = reiserfs_chown_xattrs(inode, attr);
3006
3007                         if (!error) {
3008                                 struct reiserfs_transaction_handle th;
3009                                 int jbegin_count =
3010                                     2 *
3011                                     (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) +
3012                                      REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) +
3013                                     2;
3014
3015                                 /* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
3016                                 error =
3017                                     journal_begin(&th, inode->i_sb,
3018                                                   jbegin_count);
3019                                 if (error)
3020                                         goto out;
3021                                 error =
3022                                     DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0;
3023                                 if (error) {
3024                                         journal_end(&th, inode->i_sb,
3025                                                     jbegin_count);
3026                                         goto out;
3027                                 }
3028                                 /* Update corresponding info in inode so that everything is in
3029                                  * one transaction */
3030                                 if (attr->ia_valid & ATTR_UID)
3031                                         inode->i_uid = attr->ia_uid;
3032                                 if (attr->ia_valid & ATTR_GID)
3033                                         inode->i_gid = attr->ia_gid;
3034                                 if ((attr->ia_valid & ATTR_XID) &&
3035                                         IS_TAGXID(inode))
3036                                         inode->i_xid = attr->ia_xid;
3037                                 mark_inode_dirty(inode);
3038                                 error =
3039                                     journal_end(&th, inode->i_sb, jbegin_count);
3040                         }
3041                 }
3042                 if (!error)
3043                         error = inode_setattr(inode, attr);
3044         }
3045
3046         if (!error && reiserfs_posixacl(inode->i_sb)) {
3047                 if (attr->ia_valid & ATTR_MODE)
3048                         error = reiserfs_acl_chmod(inode);
3049         }
3050
3051       out:
3052         reiserfs_write_unlock(inode->i_sb);
3053         return error;
3054 }
3055
3056 struct address_space_operations reiserfs_address_space_operations = {
3057         .writepage = reiserfs_writepage,
3058         .readpage = reiserfs_readpage,
3059         .readpages = reiserfs_readpages,
3060         .releasepage = reiserfs_releasepage,
3061         .invalidatepage = reiserfs_invalidatepage,
3062         .sync_page = block_sync_page,
3063         .prepare_write = reiserfs_prepare_write,
3064         .commit_write = reiserfs_commit_write,
3065         .bmap = reiserfs_aop_bmap,
3066         .direct_IO = reiserfs_direct_IO,
3067         .set_page_dirty = reiserfs_set_page_dirty,
3068 };